elf64-s390.c revision 1.1.1.3 1 1.1 christos /* IBM S/390-specific support for 64-bit ELF
2 1.1.1.2 christos Copyright (C) 2000-2015 Free Software Foundation, Inc.
3 1.1 christos Contributed Martin Schwidefsky (schwidefsky (at) de.ibm.com).
4 1.1 christos
5 1.1 christos This file is part of BFD, the Binary File Descriptor library.
6 1.1 christos
7 1.1 christos This program is free software; you can redistribute it and/or modify
8 1.1 christos it under the terms of the GNU General Public License as published by
9 1.1 christos the Free Software Foundation; either version 3 of the License, or
10 1.1 christos (at your option) any later version.
11 1.1 christos
12 1.1 christos This program is distributed in the hope that it will be useful,
13 1.1 christos but WITHOUT ANY WARRANTY; without even the implied warranty of
14 1.1 christos MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 1.1 christos GNU General Public License for more details.
16 1.1 christos
17 1.1 christos You should have received a copy of the GNU General Public License
18 1.1 christos along with this program; if not, write to the Free Software
19 1.1 christos Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
20 1.1 christos 02110-1301, USA. */
21 1.1 christos
22 1.1 christos #include "sysdep.h"
23 1.1 christos #include "bfd.h"
24 1.1 christos #include "bfdlink.h"
25 1.1 christos #include "libbfd.h"
26 1.1 christos #include "elf-bfd.h"
27 1.1 christos #include "elf/s390.h"
28 1.1 christos
29 1.1 christos /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
30 1.1 christos from smaller values. Start with zero, widen, *then* decrement. */
31 1.1 christos #define MINUS_ONE (((bfd_vma)0) - 1)
32 1.1 christos
33 1.1 christos static bfd_reloc_status_type
34 1.1 christos s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
35 1.1 christos asection *, bfd *, char **);
36 1.1 christos static bfd_reloc_status_type
37 1.1 christos s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
38 1.1 christos asection *, bfd *, char **);
39 1.1 christos
40 1.1 christos /* The relocation "howto" table. */
41 1.1 christos static reloc_howto_type elf_howto_table[] =
42 1.1 christos {
43 1.1 christos HOWTO (R_390_NONE, /* type */
44 1.1 christos 0, /* rightshift */
45 1.1.1.3 christos 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
46 1.1 christos 0, /* bitsize */
47 1.1 christos FALSE, /* pc_relative */
48 1.1 christos 0, /* bitpos */
49 1.1 christos complain_overflow_dont, /* complain_on_overflow */
50 1.1 christos bfd_elf_generic_reloc, /* special_function */
51 1.1 christos "R_390_NONE", /* name */
52 1.1 christos FALSE, /* partial_inplace */
53 1.1 christos 0, /* src_mask */
54 1.1 christos 0, /* dst_mask */
55 1.1 christos FALSE), /* pcrel_offset */
56 1.1 christos
57 1.1 christos HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
58 1.1 christos bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
59 1.1 christos HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
60 1.1 christos bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
61 1.1 christos HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
62 1.1 christos bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
63 1.1 christos HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
64 1.1 christos bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
65 1.1 christos HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
66 1.1 christos bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
67 1.1 christos HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
68 1.1 christos bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
69 1.1 christos HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
70 1.1 christos bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
71 1.1 christos HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
72 1.1 christos bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
73 1.1 christos HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
74 1.1 christos bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
75 1.1 christos HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
76 1.1 christos bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
77 1.1 christos HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
78 1.1 christos bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
79 1.1 christos HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
80 1.1 christos bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
81 1.1 christos HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
82 1.1 christos bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
83 1.1 christos HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
84 1.1 christos bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
85 1.1 christos HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
86 1.1 christos bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
87 1.1 christos HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
88 1.1 christos bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
89 1.1 christos HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 1.1 christos bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
91 1.1 christos HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
92 1.1 christos bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
93 1.1 christos HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
94 1.1 christos bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
95 1.1 christos HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 1.1 christos bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
97 1.1 christos HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
98 1.1 christos bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
99 1.1 christos HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
100 1.1 christos bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
101 1.1 christos HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
102 1.1 christos bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
103 1.1 christos HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
104 1.1 christos bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
105 1.1 christos HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
106 1.1 christos bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
107 1.1 christos HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
108 1.1 christos bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
109 1.1 christos HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
110 1.1 christos bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
111 1.1 christos HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
112 1.1 christos bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
113 1.1 christos HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
114 1.1 christos bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
115 1.1 christos HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
116 1.1 christos bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
117 1.1 christos HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 1.1 christos bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
119 1.1 christos HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
120 1.1 christos bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
121 1.1 christos HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
122 1.1 christos bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
123 1.1 christos HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
124 1.1 christos bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
125 1.1 christos HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 1.1 christos bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
127 1.1 christos HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
128 1.1 christos bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
129 1.1 christos HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
130 1.1 christos s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
131 1.1 christos HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
132 1.1 christos s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
133 1.1 christos HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
134 1.1 christos s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
135 1.1 christos EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
136 1.1 christos HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
137 1.1 christos bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
138 1.1 christos HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
139 1.1 christos bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
140 1.1 christos EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
141 1.1 christos HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
142 1.1 christos bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
143 1.1 christos EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
144 1.1 christos HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
145 1.1 christos bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
146 1.1 christos EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
147 1.1 christos HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
148 1.1 christos bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
149 1.1 christos HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
150 1.1 christos bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
151 1.1 christos EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
152 1.1 christos HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
153 1.1 christos bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
154 1.1 christos EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
155 1.1 christos HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
156 1.1 christos bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
157 1.1 christos HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
158 1.1 christos bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
159 1.1 christos HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
160 1.1 christos bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
161 1.1 christos HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
162 1.1 christos bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
163 1.1 christos HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
164 1.1 christos s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
165 1.1 christos HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
166 1.1 christos s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
167 1.1 christos HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
168 1.1 christos s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
169 1.1 christos HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
170 1.1 christos s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
171 1.1 christos HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
172 1.1 christos bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE),
173 1.1 christos HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
174 1.1 christos bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
175 1.1 christos HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
176 1.1 christos bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
177 1.1 christos HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
178 1.1 christos bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
179 1.1 christos HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
180 1.1 christos bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
181 1.1 christos };
182 1.1 christos
183 1.1 christos /* GNU extension to record C++ vtable hierarchy. */
184 1.1 christos static reloc_howto_type elf64_s390_vtinherit_howto =
185 1.1 christos HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
186 1.1 christos static reloc_howto_type elf64_s390_vtentry_howto =
187 1.1 christos HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
188 1.1 christos
189 1.1 christos static reloc_howto_type *
190 1.1 christos elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
191 1.1 christos bfd_reloc_code_real_type code)
192 1.1 christos {
193 1.1 christos switch (code)
194 1.1 christos {
195 1.1 christos case BFD_RELOC_NONE:
196 1.1 christos return &elf_howto_table[(int) R_390_NONE];
197 1.1 christos case BFD_RELOC_8:
198 1.1 christos return &elf_howto_table[(int) R_390_8];
199 1.1 christos case BFD_RELOC_390_12:
200 1.1 christos return &elf_howto_table[(int) R_390_12];
201 1.1 christos case BFD_RELOC_16:
202 1.1 christos return &elf_howto_table[(int) R_390_16];
203 1.1 christos case BFD_RELOC_32:
204 1.1 christos return &elf_howto_table[(int) R_390_32];
205 1.1 christos case BFD_RELOC_CTOR:
206 1.1 christos return &elf_howto_table[(int) R_390_32];
207 1.1 christos case BFD_RELOC_32_PCREL:
208 1.1 christos return &elf_howto_table[(int) R_390_PC32];
209 1.1 christos case BFD_RELOC_390_GOT12:
210 1.1 christos return &elf_howto_table[(int) R_390_GOT12];
211 1.1 christos case BFD_RELOC_32_GOT_PCREL:
212 1.1 christos return &elf_howto_table[(int) R_390_GOT32];
213 1.1 christos case BFD_RELOC_390_PLT32:
214 1.1 christos return &elf_howto_table[(int) R_390_PLT32];
215 1.1 christos case BFD_RELOC_390_COPY:
216 1.1 christos return &elf_howto_table[(int) R_390_COPY];
217 1.1 christos case BFD_RELOC_390_GLOB_DAT:
218 1.1 christos return &elf_howto_table[(int) R_390_GLOB_DAT];
219 1.1 christos case BFD_RELOC_390_JMP_SLOT:
220 1.1 christos return &elf_howto_table[(int) R_390_JMP_SLOT];
221 1.1 christos case BFD_RELOC_390_RELATIVE:
222 1.1 christos return &elf_howto_table[(int) R_390_RELATIVE];
223 1.1 christos case BFD_RELOC_32_GOTOFF:
224 1.1 christos return &elf_howto_table[(int) R_390_GOTOFF32];
225 1.1 christos case BFD_RELOC_390_GOTPC:
226 1.1 christos return &elf_howto_table[(int) R_390_GOTPC];
227 1.1 christos case BFD_RELOC_390_GOT16:
228 1.1 christos return &elf_howto_table[(int) R_390_GOT16];
229 1.1 christos case BFD_RELOC_16_PCREL:
230 1.1 christos return &elf_howto_table[(int) R_390_PC16];
231 1.1 christos case BFD_RELOC_390_PC12DBL:
232 1.1 christos return &elf_howto_table[(int) R_390_PC12DBL];
233 1.1 christos case BFD_RELOC_390_PLT12DBL:
234 1.1 christos return &elf_howto_table[(int) R_390_PLT12DBL];
235 1.1 christos case BFD_RELOC_390_PC16DBL:
236 1.1 christos return &elf_howto_table[(int) R_390_PC16DBL];
237 1.1 christos case BFD_RELOC_390_PLT16DBL:
238 1.1 christos return &elf_howto_table[(int) R_390_PLT16DBL];
239 1.1 christos case BFD_RELOC_390_PC24DBL:
240 1.1 christos return &elf_howto_table[(int) R_390_PC24DBL];
241 1.1 christos case BFD_RELOC_390_PLT24DBL:
242 1.1 christos return &elf_howto_table[(int) R_390_PLT24DBL];
243 1.1 christos case BFD_RELOC_390_PC32DBL:
244 1.1 christos return &elf_howto_table[(int) R_390_PC32DBL];
245 1.1 christos case BFD_RELOC_390_PLT32DBL:
246 1.1 christos return &elf_howto_table[(int) R_390_PLT32DBL];
247 1.1 christos case BFD_RELOC_390_GOTPCDBL:
248 1.1 christos return &elf_howto_table[(int) R_390_GOTPCDBL];
249 1.1 christos case BFD_RELOC_64:
250 1.1 christos return &elf_howto_table[(int) R_390_64];
251 1.1 christos case BFD_RELOC_64_PCREL:
252 1.1 christos return &elf_howto_table[(int) R_390_PC64];
253 1.1 christos case BFD_RELOC_390_GOT64:
254 1.1 christos return &elf_howto_table[(int) R_390_GOT64];
255 1.1 christos case BFD_RELOC_390_PLT64:
256 1.1 christos return &elf_howto_table[(int) R_390_PLT64];
257 1.1 christos case BFD_RELOC_390_GOTENT:
258 1.1 christos return &elf_howto_table[(int) R_390_GOTENT];
259 1.1 christos case BFD_RELOC_16_GOTOFF:
260 1.1 christos return &elf_howto_table[(int) R_390_GOTOFF16];
261 1.1 christos case BFD_RELOC_390_GOTOFF64:
262 1.1 christos return &elf_howto_table[(int) R_390_GOTOFF64];
263 1.1 christos case BFD_RELOC_390_GOTPLT12:
264 1.1 christos return &elf_howto_table[(int) R_390_GOTPLT12];
265 1.1 christos case BFD_RELOC_390_GOTPLT16:
266 1.1 christos return &elf_howto_table[(int) R_390_GOTPLT16];
267 1.1 christos case BFD_RELOC_390_GOTPLT32:
268 1.1 christos return &elf_howto_table[(int) R_390_GOTPLT32];
269 1.1 christos case BFD_RELOC_390_GOTPLT64:
270 1.1 christos return &elf_howto_table[(int) R_390_GOTPLT64];
271 1.1 christos case BFD_RELOC_390_GOTPLTENT:
272 1.1 christos return &elf_howto_table[(int) R_390_GOTPLTENT];
273 1.1 christos case BFD_RELOC_390_PLTOFF16:
274 1.1 christos return &elf_howto_table[(int) R_390_PLTOFF16];
275 1.1 christos case BFD_RELOC_390_PLTOFF32:
276 1.1 christos return &elf_howto_table[(int) R_390_PLTOFF32];
277 1.1 christos case BFD_RELOC_390_PLTOFF64:
278 1.1 christos return &elf_howto_table[(int) R_390_PLTOFF64];
279 1.1 christos case BFD_RELOC_390_TLS_LOAD:
280 1.1 christos return &elf_howto_table[(int) R_390_TLS_LOAD];
281 1.1 christos case BFD_RELOC_390_TLS_GDCALL:
282 1.1 christos return &elf_howto_table[(int) R_390_TLS_GDCALL];
283 1.1 christos case BFD_RELOC_390_TLS_LDCALL:
284 1.1 christos return &elf_howto_table[(int) R_390_TLS_LDCALL];
285 1.1 christos case BFD_RELOC_390_TLS_GD64:
286 1.1 christos return &elf_howto_table[(int) R_390_TLS_GD64];
287 1.1 christos case BFD_RELOC_390_TLS_GOTIE12:
288 1.1 christos return &elf_howto_table[(int) R_390_TLS_GOTIE12];
289 1.1 christos case BFD_RELOC_390_TLS_GOTIE64:
290 1.1 christos return &elf_howto_table[(int) R_390_TLS_GOTIE64];
291 1.1 christos case BFD_RELOC_390_TLS_LDM64:
292 1.1 christos return &elf_howto_table[(int) R_390_TLS_LDM64];
293 1.1 christos case BFD_RELOC_390_TLS_IE64:
294 1.1 christos return &elf_howto_table[(int) R_390_TLS_IE64];
295 1.1 christos case BFD_RELOC_390_TLS_IEENT:
296 1.1 christos return &elf_howto_table[(int) R_390_TLS_IEENT];
297 1.1 christos case BFD_RELOC_390_TLS_LE64:
298 1.1 christos return &elf_howto_table[(int) R_390_TLS_LE64];
299 1.1 christos case BFD_RELOC_390_TLS_LDO64:
300 1.1 christos return &elf_howto_table[(int) R_390_TLS_LDO64];
301 1.1 christos case BFD_RELOC_390_TLS_DTPMOD:
302 1.1 christos return &elf_howto_table[(int) R_390_TLS_DTPMOD];
303 1.1 christos case BFD_RELOC_390_TLS_DTPOFF:
304 1.1 christos return &elf_howto_table[(int) R_390_TLS_DTPOFF];
305 1.1 christos case BFD_RELOC_390_TLS_TPOFF:
306 1.1 christos return &elf_howto_table[(int) R_390_TLS_TPOFF];
307 1.1 christos case BFD_RELOC_390_20:
308 1.1 christos return &elf_howto_table[(int) R_390_20];
309 1.1 christos case BFD_RELOC_390_GOT20:
310 1.1 christos return &elf_howto_table[(int) R_390_GOT20];
311 1.1 christos case BFD_RELOC_390_GOTPLT20:
312 1.1 christos return &elf_howto_table[(int) R_390_GOTPLT20];
313 1.1 christos case BFD_RELOC_390_TLS_GOTIE20:
314 1.1 christos return &elf_howto_table[(int) R_390_TLS_GOTIE20];
315 1.1 christos case BFD_RELOC_390_IRELATIVE:
316 1.1 christos return &elf_howto_table[(int) R_390_IRELATIVE];
317 1.1 christos case BFD_RELOC_VTABLE_INHERIT:
318 1.1 christos return &elf64_s390_vtinherit_howto;
319 1.1 christos case BFD_RELOC_VTABLE_ENTRY:
320 1.1 christos return &elf64_s390_vtentry_howto;
321 1.1 christos default:
322 1.1 christos break;
323 1.1 christos }
324 1.1 christos return 0;
325 1.1 christos }
326 1.1 christos
327 1.1 christos static reloc_howto_type *
328 1.1 christos elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
329 1.1 christos const char *r_name)
330 1.1 christos {
331 1.1 christos unsigned int i;
332 1.1 christos
333 1.1 christos for (i = 0;
334 1.1 christos i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
335 1.1 christos i++)
336 1.1 christos if (elf_howto_table[i].name != NULL
337 1.1 christos && strcasecmp (elf_howto_table[i].name, r_name) == 0)
338 1.1 christos return &elf_howto_table[i];
339 1.1 christos
340 1.1 christos if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
341 1.1 christos return &elf64_s390_vtinherit_howto;
342 1.1 christos if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
343 1.1 christos return &elf64_s390_vtentry_howto;
344 1.1 christos
345 1.1 christos return NULL;
346 1.1 christos }
347 1.1 christos
348 1.1 christos /* We need to use ELF64_R_TYPE so we have our own copy of this function,
349 1.1 christos and elf64-s390.c has its own copy. */
350 1.1 christos
351 1.1 christos static void
352 1.1 christos elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
353 1.1 christos arelent *cache_ptr,
354 1.1 christos Elf_Internal_Rela *dst)
355 1.1 christos {
356 1.1 christos unsigned int r_type = ELF64_R_TYPE(dst->r_info);
357 1.1 christos switch (r_type)
358 1.1 christos {
359 1.1 christos case R_390_GNU_VTINHERIT:
360 1.1 christos cache_ptr->howto = &elf64_s390_vtinherit_howto;
361 1.1 christos break;
362 1.1 christos
363 1.1 christos case R_390_GNU_VTENTRY:
364 1.1 christos cache_ptr->howto = &elf64_s390_vtentry_howto;
365 1.1 christos break;
366 1.1 christos
367 1.1 christos default:
368 1.1 christos if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
369 1.1 christos {
370 1.1 christos (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
371 1.1 christos abfd, (int) r_type);
372 1.1 christos r_type = R_390_NONE;
373 1.1 christos }
374 1.1 christos cache_ptr->howto = &elf_howto_table[r_type];
375 1.1 christos }
376 1.1 christos }
377 1.1 christos
378 1.1 christos /* A relocation function which doesn't do anything. */
379 1.1 christos static bfd_reloc_status_type
380 1.1 christos s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
381 1.1 christos arelent *reloc_entry,
382 1.1 christos asymbol *symbol ATTRIBUTE_UNUSED,
383 1.1 christos void * data ATTRIBUTE_UNUSED,
384 1.1 christos asection *input_section,
385 1.1 christos bfd *output_bfd,
386 1.1 christos char **error_message ATTRIBUTE_UNUSED)
387 1.1 christos {
388 1.1 christos if (output_bfd)
389 1.1 christos reloc_entry->address += input_section->output_offset;
390 1.1 christos return bfd_reloc_ok;
391 1.1 christos }
392 1.1 christos
393 1.1 christos /* Handle the large displacement relocs. */
394 1.1 christos static bfd_reloc_status_type
395 1.1 christos s390_elf_ldisp_reloc (bfd *abfd,
396 1.1 christos arelent *reloc_entry,
397 1.1 christos asymbol *symbol,
398 1.1 christos void * data,
399 1.1 christos asection *input_section,
400 1.1 christos bfd *output_bfd,
401 1.1 christos char **error_message ATTRIBUTE_UNUSED)
402 1.1 christos {
403 1.1 christos reloc_howto_type *howto = reloc_entry->howto;
404 1.1 christos bfd_vma relocation;
405 1.1 christos bfd_vma insn;
406 1.1 christos
407 1.1 christos if (output_bfd != (bfd *) NULL
408 1.1 christos && (symbol->flags & BSF_SECTION_SYM) == 0
409 1.1 christos && (! howto->partial_inplace
410 1.1 christos || reloc_entry->addend == 0))
411 1.1 christos {
412 1.1 christos reloc_entry->address += input_section->output_offset;
413 1.1 christos return bfd_reloc_ok;
414 1.1 christos }
415 1.1 christos if (output_bfd != NULL)
416 1.1 christos return bfd_reloc_continue;
417 1.1 christos
418 1.1 christos if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
419 1.1 christos return bfd_reloc_outofrange;
420 1.1 christos
421 1.1 christos relocation = (symbol->value
422 1.1 christos + symbol->section->output_section->vma
423 1.1 christos + symbol->section->output_offset);
424 1.1 christos relocation += reloc_entry->addend;
425 1.1 christos if (howto->pc_relative)
426 1.1 christos {
427 1.1 christos relocation -= (input_section->output_section->vma
428 1.1 christos + input_section->output_offset);
429 1.1 christos relocation -= reloc_entry->address;
430 1.1 christos }
431 1.1 christos
432 1.1 christos insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
433 1.1 christos insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
434 1.1 christos bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
435 1.1 christos
436 1.1 christos if ((bfd_signed_vma) relocation < - 0x80000
437 1.1 christos || (bfd_signed_vma) relocation > 0x7ffff)
438 1.1 christos return bfd_reloc_overflow;
439 1.1 christos else
440 1.1 christos return bfd_reloc_ok;
441 1.1 christos }
442 1.1 christos
443 1.1 christos static bfd_boolean
444 1.1 christos elf_s390_is_local_label_name (bfd *abfd, const char *name)
445 1.1 christos {
446 1.1 christos if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
447 1.1 christos return TRUE;
448 1.1 christos
449 1.1 christos return _bfd_elf_is_local_label_name (abfd, name);
450 1.1 christos }
451 1.1 christos
452 1.1 christos /* Functions for the 390 ELF linker. */
453 1.1 christos
454 1.1 christos /* The name of the dynamic interpreter. This is put in the .interp
455 1.1 christos section. */
456 1.1 christos
457 1.1 christos #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
458 1.1 christos
459 1.1 christos /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
460 1.1 christos copying dynamic variables from a shared lib into an app's dynbss
461 1.1 christos section, and instead use a dynamic relocation to point into the
462 1.1 christos shared lib. */
463 1.1 christos #define ELIMINATE_COPY_RELOCS 1
464 1.1 christos
465 1.1 christos /* The size in bytes of the first entry in the procedure linkage table. */
466 1.1 christos #define PLT_FIRST_ENTRY_SIZE 32
467 1.1 christos /* The size in bytes of an entry in the procedure linkage table. */
468 1.1 christos #define PLT_ENTRY_SIZE 32
469 1.1 christos
470 1.1 christos #define GOT_ENTRY_SIZE 8
471 1.1 christos
472 1.1 christos #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
473 1.1 christos
474 1.1 christos /* The first three entries in a procedure linkage table are reserved,
475 1.1 christos and the initial contents are unimportant (we zero them out).
476 1.1 christos Subsequent entries look like this. See the SVR4 ABI 386
477 1.1 christos supplement to see how this works. */
478 1.1 christos
479 1.1 christos /* For the s390, simple addr offset can only be 0 - 4096.
480 1.1 christos To use the full 16777216 TB address space, several instructions
481 1.1 christos are needed to load an address in a register and execute
482 1.1 christos a branch( or just saving the address)
483 1.1 christos
484 1.1 christos Furthermore, only r 0 and 1 are free to use!!! */
485 1.1 christos
486 1.1 christos /* The first 3 words in the GOT are then reserved.
487 1.1 christos Word 0 is the address of the dynamic table.
488 1.1 christos Word 1 is a pointer to a structure describing the object
489 1.1 christos Word 2 is used to point to the loader entry address.
490 1.1 christos
491 1.1 christos The code for PLT entries looks like this:
492 1.1 christos
493 1.1 christos The GOT holds the address in the PLT to be executed.
494 1.1 christos The loader then gets:
495 1.1 christos 24(15) = Pointer to the structure describing the object.
496 1.1 christos 28(15) = Offset in symbol table
497 1.1 christos The loader must then find the module where the function is
498 1.1 christos and insert the address in the GOT.
499 1.1 christos
500 1.1 christos PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
501 1.1 christos LG 1,0(1) # 6 bytes Load address from GOT in r1
502 1.1 christos BCR 15,1 # 2 bytes Jump to address
503 1.1 christos RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
504 1.1 christos LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
505 1.1 christos BRCL 15,-x # 6 bytes Jump to start of PLT
506 1.1 christos .long ? # 4 bytes offset into .rela.plt
507 1.1 christos
508 1.1 christos Total = 32 bytes per PLT entry
509 1.1 christos Fixup at offset 2: relative address to GOT entry
510 1.1 christos Fixup at offset 22: relative branch to PLT0
511 1.1 christos Fixup at offset 28: 32 bit offset into .rela.plt
512 1.1 christos
513 1.1 christos A 32 bit offset into the symbol table is enough. It allows for
514 1.1 christos .rela.plt sections up to a size of 2 gigabyte. A single dynamic
515 1.1 christos object (the main program, any shared library) is limited to 4GB in
516 1.1 christos size. Having a .rela.plt of 2GB would already make the .plt
517 1.1 christos section bigger than 8GB. */
518 1.1 christos
519 1.1 christos static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
520 1.1 christos {
521 1.1 christos 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
522 1.1 christos 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
523 1.1 christos 0x07, 0xf1, /* br %r1 */
524 1.1 christos 0x0d, 0x10, /* basr %r1,%r0 */
525 1.1 christos 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
526 1.1 christos 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
527 1.1 christos 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
528 1.1 christos };
529 1.1 christos
530 1.1 christos /* The first PLT entry pushes the offset into the symbol table
531 1.1 christos from R1 onto the stack at 56(15) and the loader object info
532 1.1 christos at 48(15), loads the loader address in R1 and jumps to it. */
533 1.1 christos
534 1.1 christos /* The first entry in the PLT:
535 1.1 christos
536 1.1 christos PLT0:
537 1.1 christos STG 1,56(15) # r1 contains the offset into the symbol table
538 1.1 christos LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
539 1.1 christos MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
540 1.1 christos LG 1,16(1) # get entry address of loader
541 1.1 christos BCR 15,1 # jump to loader
542 1.1 christos
543 1.1 christos Fixup at offset 8: relative address to start of GOT. */
544 1.1 christos
545 1.1 christos static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
546 1.1 christos {
547 1.1 christos 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
548 1.1 christos 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
549 1.1 christos 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
550 1.1 christos 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
551 1.1 christos 0x07, 0xf1, /* br %r1 */
552 1.1 christos 0x07, 0x00, /* nopr %r0 */
553 1.1 christos 0x07, 0x00, /* nopr %r0 */
554 1.1 christos 0x07, 0x00 /* nopr %r0 */
555 1.1 christos };
556 1.1 christos
557 1.1 christos
558 1.1 christos /* s390 ELF linker hash entry. */
559 1.1 christos
560 1.1 christos struct elf_s390_link_hash_entry
561 1.1 christos {
562 1.1 christos struct elf_link_hash_entry elf;
563 1.1 christos
564 1.1 christos /* Track dynamic relocs copied for this symbol. */
565 1.1 christos struct elf_dyn_relocs *dyn_relocs;
566 1.1 christos
567 1.1 christos /* Number of GOTPLT references for a function. */
568 1.1 christos bfd_signed_vma gotplt_refcount;
569 1.1 christos
570 1.1 christos #define GOT_UNKNOWN 0
571 1.1 christos #define GOT_NORMAL 1
572 1.1 christos #define GOT_TLS_GD 2
573 1.1 christos #define GOT_TLS_IE 3
574 1.1 christos #define GOT_TLS_IE_NLT 3
575 1.1 christos unsigned char tls_type;
576 1.1 christos
577 1.1 christos /* For pointer equality reasons we might need to change the symbol
578 1.1 christos type from STT_GNU_IFUNC to STT_FUNC together with its value and
579 1.1 christos section entry. So after alloc_dynrelocs only these values should
580 1.1 christos be used. In order to check whether a symbol is IFUNC use
581 1.1 christos s390_is_ifunc_symbol_p. */
582 1.1 christos bfd_vma ifunc_resolver_address;
583 1.1 christos asection *ifunc_resolver_section;
584 1.1 christos };
585 1.1 christos
586 1.1 christos #define elf_s390_hash_entry(ent) \
587 1.1 christos ((struct elf_s390_link_hash_entry *)(ent))
588 1.1 christos
589 1.1 christos /* This structure represents an entry in the local PLT list needed for
590 1.1 christos local IFUNC symbols. */
591 1.1 christos struct plt_entry
592 1.1 christos {
593 1.1 christos /* The section of the local symbol.
594 1.1 christos Set in relocate_section and used in finish_dynamic_sections. */
595 1.1 christos asection *sec;
596 1.1 christos
597 1.1 christos union
598 1.1 christos {
599 1.1 christos bfd_signed_vma refcount;
600 1.1 christos bfd_vma offset;
601 1.1 christos } plt;
602 1.1 christos };
603 1.1 christos
604 1.1 christos /* NOTE: Keep this structure in sync with
605 1.1 christos the one declared in elf32-s390.c. */
606 1.1 christos struct elf_s390_obj_tdata
607 1.1 christos {
608 1.1 christos struct elf_obj_tdata root;
609 1.1 christos
610 1.1 christos /* A local PLT is needed for ifunc symbols. */
611 1.1 christos struct plt_entry *local_plt;
612 1.1 christos
613 1.1 christos /* TLS type for each local got entry. */
614 1.1 christos char *local_got_tls_type;
615 1.1 christos };
616 1.1 christos
617 1.1 christos #define elf_s390_tdata(abfd) \
618 1.1 christos ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
619 1.1 christos
620 1.1 christos #define elf_s390_local_plt(abfd) \
621 1.1 christos (elf_s390_tdata (abfd)->local_plt)
622 1.1 christos
623 1.1 christos #define elf_s390_local_got_tls_type(abfd) \
624 1.1 christos (elf_s390_tdata (abfd)->local_got_tls_type)
625 1.1 christos
626 1.1 christos #define is_s390_elf(bfd) \
627 1.1 christos (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
628 1.1 christos && elf_tdata (bfd) != NULL \
629 1.1 christos && elf_object_id (bfd) == S390_ELF_DATA)
630 1.1 christos
631 1.1 christos static bfd_boolean
632 1.1 christos elf_s390_mkobject (bfd *abfd)
633 1.1 christos {
634 1.1 christos return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
635 1.1 christos S390_ELF_DATA);
636 1.1 christos }
637 1.1 christos
638 1.1 christos static bfd_boolean
639 1.1 christos elf_s390_object_p (bfd *abfd)
640 1.1 christos {
641 1.1 christos /* Set the right machine number for an s390 elf32 file. */
642 1.1 christos return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
643 1.1 christos }
644 1.1 christos
645 1.1 christos /* s390 ELF linker hash table. */
646 1.1 christos
647 1.1 christos struct elf_s390_link_hash_table
648 1.1 christos {
649 1.1 christos struct elf_link_hash_table elf;
650 1.1 christos
651 1.1 christos /* Short-cuts to get to dynamic linker sections. */
652 1.1 christos asection *sdynbss;
653 1.1 christos asection *srelbss;
654 1.1 christos asection *irelifunc;
655 1.1 christos
656 1.1 christos union {
657 1.1 christos bfd_signed_vma refcount;
658 1.1 christos bfd_vma offset;
659 1.1 christos } tls_ldm_got;
660 1.1 christos
661 1.1 christos /* Small local sym cache. */
662 1.1 christos struct sym_cache sym_cache;
663 1.1 christos };
664 1.1 christos
665 1.1 christos /* Get the s390 ELF linker hash table from a link_info structure. */
666 1.1 christos
667 1.1 christos #define elf_s390_hash_table(p) \
668 1.1 christos (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
669 1.1 christos == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
670 1.1 christos
671 1.1 christos #define ELF64 1
672 1.1 christos #include "elf-s390-common.c"
673 1.1 christos
674 1.1 christos /* Create an entry in an s390 ELF linker hash table. */
675 1.1 christos
676 1.1 christos static struct bfd_hash_entry *
677 1.1 christos link_hash_newfunc (struct bfd_hash_entry *entry,
678 1.1 christos struct bfd_hash_table *table,
679 1.1 christos const char *string)
680 1.1 christos {
681 1.1 christos /* Allocate the structure if it has not already been allocated by a
682 1.1 christos subclass. */
683 1.1 christos if (entry == NULL)
684 1.1 christos {
685 1.1 christos entry = bfd_hash_allocate (table,
686 1.1 christos sizeof (struct elf_s390_link_hash_entry));
687 1.1 christos if (entry == NULL)
688 1.1 christos return entry;
689 1.1 christos }
690 1.1 christos
691 1.1 christos /* Call the allocation method of the superclass. */
692 1.1 christos entry = _bfd_elf_link_hash_newfunc (entry, table, string);
693 1.1 christos if (entry != NULL)
694 1.1 christos {
695 1.1 christos struct elf_s390_link_hash_entry *eh;
696 1.1 christos
697 1.1 christos eh = (struct elf_s390_link_hash_entry *) entry;
698 1.1 christos eh->dyn_relocs = NULL;
699 1.1 christos eh->gotplt_refcount = 0;
700 1.1 christos eh->tls_type = GOT_UNKNOWN;
701 1.1 christos eh->ifunc_resolver_address = 0;
702 1.1 christos eh->ifunc_resolver_section = NULL;
703 1.1 christos }
704 1.1 christos
705 1.1 christos return entry;
706 1.1 christos }
707 1.1 christos
708 1.1 christos /* Create an s390 ELF linker hash table. */
709 1.1 christos
710 1.1 christos static struct bfd_link_hash_table *
711 1.1 christos elf_s390_link_hash_table_create (bfd *abfd)
712 1.1 christos {
713 1.1 christos struct elf_s390_link_hash_table *ret;
714 1.1 christos bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
715 1.1 christos
716 1.1 christos ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
717 1.1 christos if (ret == NULL)
718 1.1 christos return NULL;
719 1.1 christos
720 1.1 christos if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
721 1.1 christos sizeof (struct elf_s390_link_hash_entry),
722 1.1 christos S390_ELF_DATA))
723 1.1 christos {
724 1.1 christos free (ret);
725 1.1 christos return NULL;
726 1.1 christos }
727 1.1 christos
728 1.1 christos return &ret->elf.root;
729 1.1 christos }
730 1.1 christos
731 1.1 christos /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
732 1.1 christos shortcuts to them in our hash table. */
733 1.1 christos
734 1.1 christos static bfd_boolean
735 1.1 christos create_got_section (bfd *dynobj,
736 1.1 christos struct bfd_link_info *info)
737 1.1 christos {
738 1.1 christos struct elf_s390_link_hash_table *htab;
739 1.1 christos
740 1.1 christos if (! _bfd_elf_create_got_section (dynobj, info))
741 1.1 christos return FALSE;
742 1.1 christos
743 1.1 christos htab = elf_s390_hash_table (info);
744 1.1 christos if (htab == NULL)
745 1.1 christos return FALSE;
746 1.1 christos
747 1.1 christos htab->elf.sgot = bfd_get_linker_section (dynobj, ".got");
748 1.1 christos htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
749 1.1 christos htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got");
750 1.1 christos if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot)
751 1.1 christos abort ();
752 1.1 christos return TRUE;
753 1.1 christos }
754 1.1 christos
755 1.1 christos /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
756 1.1 christos .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
757 1.1 christos hash table. */
758 1.1 christos
759 1.1 christos static bfd_boolean
760 1.1 christos elf_s390_create_dynamic_sections (bfd *dynobj,
761 1.1 christos struct bfd_link_info *info)
762 1.1 christos {
763 1.1 christos struct elf_s390_link_hash_table *htab;
764 1.1 christos
765 1.1 christos htab = elf_s390_hash_table (info);
766 1.1 christos if (htab == NULL)
767 1.1 christos return FALSE;
768 1.1 christos
769 1.1 christos if (!htab->elf.sgot && !create_got_section (dynobj, info))
770 1.1 christos return FALSE;
771 1.1 christos
772 1.1 christos if (!_bfd_elf_create_dynamic_sections (dynobj, info))
773 1.1 christos return FALSE;
774 1.1 christos
775 1.1 christos htab->elf.splt = bfd_get_linker_section (dynobj, ".plt");
776 1.1 christos htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
777 1.1 christos htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
778 1.1 christos if (!info->shared)
779 1.1 christos htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
780 1.1 christos
781 1.1 christos if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
782 1.1 christos || (!info->shared && !htab->srelbss))
783 1.1 christos abort ();
784 1.1 christos
785 1.1 christos return TRUE;
786 1.1 christos }
787 1.1 christos
788 1.1 christos /* Copy the extra info we tack onto an elf_link_hash_entry. */
789 1.1 christos
790 1.1 christos static void
791 1.1 christos elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
792 1.1 christos struct elf_link_hash_entry *dir,
793 1.1 christos struct elf_link_hash_entry *ind)
794 1.1 christos {
795 1.1 christos struct elf_s390_link_hash_entry *edir, *eind;
796 1.1 christos
797 1.1 christos edir = (struct elf_s390_link_hash_entry *) dir;
798 1.1 christos eind = (struct elf_s390_link_hash_entry *) ind;
799 1.1 christos
800 1.1 christos if (eind->dyn_relocs != NULL)
801 1.1 christos {
802 1.1 christos if (edir->dyn_relocs != NULL)
803 1.1 christos {
804 1.1 christos struct elf_dyn_relocs **pp;
805 1.1 christos struct elf_dyn_relocs *p;
806 1.1 christos
807 1.1 christos /* Add reloc counts against the indirect sym to the direct sym
808 1.1 christos list. Merge any entries against the same section. */
809 1.1 christos for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
810 1.1 christos {
811 1.1 christos struct elf_dyn_relocs *q;
812 1.1 christos
813 1.1 christos for (q = edir->dyn_relocs; q != NULL; q = q->next)
814 1.1 christos if (q->sec == p->sec)
815 1.1 christos {
816 1.1 christos q->pc_count += p->pc_count;
817 1.1 christos q->count += p->count;
818 1.1 christos *pp = p->next;
819 1.1 christos break;
820 1.1 christos }
821 1.1 christos if (q == NULL)
822 1.1 christos pp = &p->next;
823 1.1 christos }
824 1.1 christos *pp = edir->dyn_relocs;
825 1.1 christos }
826 1.1 christos
827 1.1 christos edir->dyn_relocs = eind->dyn_relocs;
828 1.1 christos eind->dyn_relocs = NULL;
829 1.1 christos }
830 1.1 christos
831 1.1 christos if (ind->root.type == bfd_link_hash_indirect
832 1.1 christos && dir->got.refcount <= 0)
833 1.1 christos {
834 1.1 christos edir->tls_type = eind->tls_type;
835 1.1 christos eind->tls_type = GOT_UNKNOWN;
836 1.1 christos }
837 1.1 christos
838 1.1 christos if (ELIMINATE_COPY_RELOCS
839 1.1 christos && ind->root.type != bfd_link_hash_indirect
840 1.1 christos && dir->dynamic_adjusted)
841 1.1 christos {
842 1.1 christos /* If called to transfer flags for a weakdef during processing
843 1.1 christos of elf_adjust_dynamic_symbol, don't copy non_got_ref.
844 1.1 christos We clear it ourselves for ELIMINATE_COPY_RELOCS. */
845 1.1 christos dir->ref_dynamic |= ind->ref_dynamic;
846 1.1 christos dir->ref_regular |= ind->ref_regular;
847 1.1 christos dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
848 1.1 christos dir->needs_plt |= ind->needs_plt;
849 1.1 christos }
850 1.1 christos else
851 1.1 christos _bfd_elf_link_hash_copy_indirect (info, dir, ind);
852 1.1 christos }
853 1.1 christos
854 1.1 christos static int
855 1.1 christos elf_s390_tls_transition (struct bfd_link_info *info,
856 1.1 christos int r_type,
857 1.1 christos int is_local)
858 1.1 christos {
859 1.1 christos if (info->shared)
860 1.1 christos return r_type;
861 1.1 christos
862 1.1 christos switch (r_type)
863 1.1 christos {
864 1.1 christos case R_390_TLS_GD64:
865 1.1 christos case R_390_TLS_IE64:
866 1.1 christos if (is_local)
867 1.1 christos return R_390_TLS_LE64;
868 1.1 christos return R_390_TLS_IE64;
869 1.1 christos case R_390_TLS_GOTIE64:
870 1.1 christos if (is_local)
871 1.1 christos return R_390_TLS_LE64;
872 1.1 christos return R_390_TLS_GOTIE64;
873 1.1 christos case R_390_TLS_LDM64:
874 1.1 christos return R_390_TLS_LE64;
875 1.1 christos }
876 1.1 christos
877 1.1 christos return r_type;
878 1.1 christos }
879 1.1 christos
880 1.1 christos /* Look through the relocs for a section during the first phase, and
881 1.1 christos allocate space in the global offset table or procedure linkage
882 1.1 christos table. */
883 1.1 christos
884 1.1 christos static bfd_boolean
885 1.1 christos elf_s390_check_relocs (bfd *abfd,
886 1.1 christos struct bfd_link_info *info,
887 1.1 christos asection *sec,
888 1.1 christos const Elf_Internal_Rela *relocs)
889 1.1 christos {
890 1.1 christos struct elf_s390_link_hash_table *htab;
891 1.1 christos Elf_Internal_Shdr *symtab_hdr;
892 1.1 christos struct elf_link_hash_entry **sym_hashes;
893 1.1 christos const Elf_Internal_Rela *rel;
894 1.1 christos const Elf_Internal_Rela *rel_end;
895 1.1 christos asection *sreloc;
896 1.1 christos bfd_signed_vma *local_got_refcounts;
897 1.1 christos int tls_type, old_tls_type;
898 1.1 christos
899 1.1 christos if (info->relocatable)
900 1.1 christos return TRUE;
901 1.1 christos
902 1.1 christos BFD_ASSERT (is_s390_elf (abfd));
903 1.1 christos
904 1.1 christos htab = elf_s390_hash_table (info);
905 1.1 christos if (htab == NULL)
906 1.1 christos return FALSE;
907 1.1 christos
908 1.1 christos symtab_hdr = &elf_symtab_hdr (abfd);
909 1.1 christos sym_hashes = elf_sym_hashes (abfd);
910 1.1 christos local_got_refcounts = elf_local_got_refcounts (abfd);
911 1.1 christos
912 1.1 christos sreloc = NULL;
913 1.1 christos
914 1.1 christos rel_end = relocs + sec->reloc_count;
915 1.1 christos for (rel = relocs; rel < rel_end; rel++)
916 1.1 christos {
917 1.1 christos unsigned int r_type;
918 1.1 christos unsigned long r_symndx;
919 1.1 christos struct elf_link_hash_entry *h;
920 1.1 christos Elf_Internal_Sym *isym;
921 1.1 christos
922 1.1 christos r_symndx = ELF64_R_SYM (rel->r_info);
923 1.1 christos
924 1.1 christos if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
925 1.1 christos {
926 1.1 christos (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
927 1.1 christos abfd,
928 1.1 christos r_symndx);
929 1.1 christos return FALSE;
930 1.1 christos }
931 1.1 christos
932 1.1 christos if (r_symndx < symtab_hdr->sh_info)
933 1.1 christos {
934 1.1 christos /* A local symbol. */
935 1.1 christos isym = bfd_sym_from_r_symndx (&htab->sym_cache,
936 1.1 christos abfd, r_symndx);
937 1.1 christos if (isym == NULL)
938 1.1 christos return FALSE;
939 1.1 christos
940 1.1 christos if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
941 1.1 christos {
942 1.1 christos struct plt_entry *plt;
943 1.1 christos
944 1.1 christos if (htab->elf.dynobj == NULL)
945 1.1 christos htab->elf.dynobj = abfd;
946 1.1 christos
947 1.1 christos if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
948 1.1 christos return FALSE;
949 1.1 christos
950 1.1 christos if (local_got_refcounts == NULL)
951 1.1 christos {
952 1.1 christos if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
953 1.1 christos return FALSE;
954 1.1 christos local_got_refcounts = elf_local_got_refcounts (abfd);
955 1.1 christos }
956 1.1 christos plt = elf_s390_local_plt (abfd);
957 1.1 christos plt[r_symndx].plt.refcount++;
958 1.1 christos }
959 1.1 christos h = NULL;
960 1.1 christos }
961 1.1 christos else
962 1.1 christos {
963 1.1 christos h = sym_hashes[r_symndx - symtab_hdr->sh_info];
964 1.1 christos while (h->root.type == bfd_link_hash_indirect
965 1.1 christos || h->root.type == bfd_link_hash_warning)
966 1.1 christos h = (struct elf_link_hash_entry *) h->root.u.i.link;
967 1.1 christos
968 1.1 christos /* PR15323, ref flags aren't set for references in the same
969 1.1 christos object. */
970 1.1 christos h->root.non_ir_ref = 1;
971 1.1 christos }
972 1.1 christos
973 1.1 christos /* Create got section and local_got_refcounts array if they
974 1.1 christos are needed. */
975 1.1 christos r_type = elf_s390_tls_transition (info,
976 1.1 christos ELF64_R_TYPE (rel->r_info),
977 1.1 christos h == NULL);
978 1.1 christos switch (r_type)
979 1.1 christos {
980 1.1 christos case R_390_GOT12:
981 1.1 christos case R_390_GOT16:
982 1.1 christos case R_390_GOT20:
983 1.1 christos case R_390_GOT32:
984 1.1 christos case R_390_GOT64:
985 1.1 christos case R_390_GOTENT:
986 1.1 christos case R_390_GOTPLT12:
987 1.1 christos case R_390_GOTPLT16:
988 1.1 christos case R_390_GOTPLT20:
989 1.1 christos case R_390_GOTPLT32:
990 1.1 christos case R_390_GOTPLT64:
991 1.1 christos case R_390_GOTPLTENT:
992 1.1 christos case R_390_TLS_GD64:
993 1.1 christos case R_390_TLS_GOTIE12:
994 1.1 christos case R_390_TLS_GOTIE20:
995 1.1 christos case R_390_TLS_GOTIE64:
996 1.1 christos case R_390_TLS_IEENT:
997 1.1 christos case R_390_TLS_IE64:
998 1.1 christos case R_390_TLS_LDM64:
999 1.1 christos if (h == NULL
1000 1.1 christos && local_got_refcounts == NULL)
1001 1.1 christos {
1002 1.1 christos if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1003 1.1 christos return FALSE;
1004 1.1 christos local_got_refcounts = elf_local_got_refcounts (abfd);
1005 1.1 christos }
1006 1.1 christos
1007 1.1 christos /* Fall through. */
1008 1.1 christos case R_390_GOTOFF16:
1009 1.1 christos case R_390_GOTOFF32:
1010 1.1 christos case R_390_GOTOFF64:
1011 1.1 christos case R_390_GOTPC:
1012 1.1 christos case R_390_GOTPCDBL:
1013 1.1 christos if (htab->elf.sgot == NULL)
1014 1.1 christos {
1015 1.1 christos if (htab->elf.dynobj == NULL)
1016 1.1 christos htab->elf.dynobj = abfd;
1017 1.1 christos if (!create_got_section (htab->elf.dynobj, info))
1018 1.1 christos return FALSE;
1019 1.1 christos }
1020 1.1 christos }
1021 1.1 christos
1022 1.1 christos if (h != NULL)
1023 1.1 christos {
1024 1.1 christos if (htab->elf.dynobj == NULL)
1025 1.1 christos htab->elf.dynobj = abfd;
1026 1.1 christos if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1027 1.1 christos return FALSE;
1028 1.1 christos
1029 1.1 christos /* Make sure an IFUNC symbol defined in a non-shared object
1030 1.1 christos always gets a PLT slot. */
1031 1.1 christos if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1032 1.1 christos {
1033 1.1 christos /* The symbol is called by the dynamic loader in order
1034 1.1 christos to resolve the relocation. So it is in fact also
1035 1.1 christos referenced. */
1036 1.1 christos h->ref_regular = 1;
1037 1.1 christos h->needs_plt = 1;
1038 1.1 christos }
1039 1.1 christos }
1040 1.1 christos
1041 1.1 christos switch (r_type)
1042 1.1 christos {
1043 1.1 christos case R_390_GOTOFF16:
1044 1.1 christos case R_390_GOTOFF32:
1045 1.1 christos case R_390_GOTOFF64:
1046 1.1 christos case R_390_GOTPC:
1047 1.1 christos case R_390_GOTPCDBL:
1048 1.1 christos /* These relocs do not need a GOT slot. They just load the
1049 1.1 christos GOT pointer itself or address something else relative to
1050 1.1 christos the GOT. Since the GOT pointer has been set up above we
1051 1.1 christos are done. */
1052 1.1 christos break;
1053 1.1 christos
1054 1.1 christos case R_390_PLT12DBL:
1055 1.1 christos case R_390_PLT16DBL:
1056 1.1 christos case R_390_PLT24DBL:
1057 1.1 christos case R_390_PLT32:
1058 1.1 christos case R_390_PLT32DBL:
1059 1.1 christos case R_390_PLT64:
1060 1.1 christos case R_390_PLTOFF16:
1061 1.1 christos case R_390_PLTOFF32:
1062 1.1 christos case R_390_PLTOFF64:
1063 1.1 christos /* This symbol requires a procedure linkage table entry. We
1064 1.1 christos actually build the entry in adjust_dynamic_symbol,
1065 1.1 christos because this might be a case of linking PIC code which is
1066 1.1 christos never referenced by a dynamic object, in which case we
1067 1.1 christos don't need to generate a procedure linkage table entry
1068 1.1 christos after all. */
1069 1.1 christos
1070 1.1 christos /* If this is a local symbol, we resolve it directly without
1071 1.1 christos creating a procedure linkage table entry. */
1072 1.1 christos if (h != NULL)
1073 1.1 christos {
1074 1.1 christos h->needs_plt = 1;
1075 1.1 christos h->plt.refcount += 1;
1076 1.1 christos }
1077 1.1 christos break;
1078 1.1 christos
1079 1.1 christos case R_390_GOTPLT12:
1080 1.1 christos case R_390_GOTPLT16:
1081 1.1 christos case R_390_GOTPLT20:
1082 1.1 christos case R_390_GOTPLT32:
1083 1.1 christos case R_390_GOTPLT64:
1084 1.1 christos case R_390_GOTPLTENT:
1085 1.1 christos /* This symbol requires either a procedure linkage table entry
1086 1.1 christos or an entry in the local got. We actually build the entry
1087 1.1 christos in adjust_dynamic_symbol because whether this is really a
1088 1.1 christos global reference can change and with it the fact if we have
1089 1.1 christos to create a plt entry or a local got entry. To be able to
1090 1.1 christos make a once global symbol a local one we have to keep track
1091 1.1 christos of the number of gotplt references that exist for this
1092 1.1 christos symbol. */
1093 1.1 christos if (h != NULL)
1094 1.1 christos {
1095 1.1 christos ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1096 1.1 christos h->needs_plt = 1;
1097 1.1 christos h->plt.refcount += 1;
1098 1.1 christos }
1099 1.1 christos else
1100 1.1 christos local_got_refcounts[r_symndx] += 1;
1101 1.1 christos break;
1102 1.1 christos
1103 1.1 christos case R_390_TLS_LDM64:
1104 1.1 christos htab->tls_ldm_got.refcount += 1;
1105 1.1 christos break;
1106 1.1 christos
1107 1.1 christos case R_390_TLS_IE64:
1108 1.1 christos case R_390_TLS_GOTIE12:
1109 1.1 christos case R_390_TLS_GOTIE20:
1110 1.1 christos case R_390_TLS_GOTIE64:
1111 1.1 christos case R_390_TLS_IEENT:
1112 1.1 christos if (info->shared)
1113 1.1 christos info->flags |= DF_STATIC_TLS;
1114 1.1 christos /* Fall through */
1115 1.1 christos
1116 1.1 christos case R_390_GOT12:
1117 1.1 christos case R_390_GOT16:
1118 1.1 christos case R_390_GOT20:
1119 1.1 christos case R_390_GOT32:
1120 1.1 christos case R_390_GOT64:
1121 1.1 christos case R_390_GOTENT:
1122 1.1 christos case R_390_TLS_GD64:
1123 1.1 christos /* This symbol requires a global offset table entry. */
1124 1.1 christos switch (r_type)
1125 1.1 christos {
1126 1.1 christos default:
1127 1.1 christos case R_390_GOT12:
1128 1.1 christos case R_390_GOT16:
1129 1.1 christos case R_390_GOT20:
1130 1.1 christos case R_390_GOT32:
1131 1.1 christos case R_390_GOTENT:
1132 1.1 christos tls_type = GOT_NORMAL;
1133 1.1 christos break;
1134 1.1 christos case R_390_TLS_GD64:
1135 1.1 christos tls_type = GOT_TLS_GD;
1136 1.1 christos break;
1137 1.1 christos case R_390_TLS_IE64:
1138 1.1 christos case R_390_TLS_GOTIE64:
1139 1.1 christos tls_type = GOT_TLS_IE;
1140 1.1 christos break;
1141 1.1 christos case R_390_TLS_GOTIE12:
1142 1.1 christos case R_390_TLS_GOTIE20:
1143 1.1 christos case R_390_TLS_IEENT:
1144 1.1 christos tls_type = GOT_TLS_IE_NLT;
1145 1.1 christos break;
1146 1.1 christos }
1147 1.1 christos
1148 1.1 christos if (h != NULL)
1149 1.1 christos {
1150 1.1 christos h->got.refcount += 1;
1151 1.1 christos old_tls_type = elf_s390_hash_entry(h)->tls_type;
1152 1.1 christos }
1153 1.1 christos else
1154 1.1 christos {
1155 1.1 christos local_got_refcounts[r_symndx] += 1;
1156 1.1 christos old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1157 1.1 christos }
1158 1.1 christos /* If a TLS symbol is accessed using IE at least once,
1159 1.1 christos there is no point to use dynamic model for it. */
1160 1.1 christos if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1161 1.1 christos {
1162 1.1 christos if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1163 1.1 christos {
1164 1.1 christos (*_bfd_error_handler)
1165 1.1 christos (_("%B: `%s' accessed both as normal and thread local symbol"),
1166 1.1 christos abfd, h->root.root.string);
1167 1.1 christos return FALSE;
1168 1.1 christos }
1169 1.1 christos if (old_tls_type > tls_type)
1170 1.1 christos tls_type = old_tls_type;
1171 1.1 christos }
1172 1.1 christos
1173 1.1 christos if (old_tls_type != tls_type)
1174 1.1 christos {
1175 1.1 christos if (h != NULL)
1176 1.1 christos elf_s390_hash_entry (h)->tls_type = tls_type;
1177 1.1 christos else
1178 1.1 christos elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1179 1.1 christos }
1180 1.1 christos
1181 1.1 christos if (r_type != R_390_TLS_IE64)
1182 1.1 christos break;
1183 1.1 christos /* Fall through */
1184 1.1 christos
1185 1.1 christos case R_390_TLS_LE64:
1186 1.1.1.2 christos /* For static linking and executables this reloc will be
1187 1.1.1.2 christos calculated at linktime otherwise a TLS_TPOFF runtime
1188 1.1.1.2 christos reloc will be generated. */
1189 1.1.1.2 christos if (r_type == R_390_TLS_LE64 && info->pie)
1190 1.1.1.2 christos break;
1191 1.1.1.2 christos
1192 1.1 christos if (!info->shared)
1193 1.1 christos break;
1194 1.1 christos info->flags |= DF_STATIC_TLS;
1195 1.1 christos /* Fall through */
1196 1.1 christos
1197 1.1 christos case R_390_8:
1198 1.1 christos case R_390_16:
1199 1.1 christos case R_390_32:
1200 1.1 christos case R_390_64:
1201 1.1 christos case R_390_PC12DBL:
1202 1.1 christos case R_390_PC16:
1203 1.1 christos case R_390_PC16DBL:
1204 1.1 christos case R_390_PC24DBL:
1205 1.1 christos case R_390_PC32:
1206 1.1 christos case R_390_PC32DBL:
1207 1.1 christos case R_390_PC64:
1208 1.1 christos if (h != NULL)
1209 1.1 christos {
1210 1.1 christos /* If this reloc is in a read-only section, we might
1211 1.1 christos need a copy reloc. We can't check reliably at this
1212 1.1 christos stage whether the section is read-only, as input
1213 1.1 christos sections have not yet been mapped to output sections.
1214 1.1 christos Tentatively set the flag for now, and correct in
1215 1.1 christos adjust_dynamic_symbol. */
1216 1.1 christos h->non_got_ref = 1;
1217 1.1 christos
1218 1.1 christos if (!info->shared)
1219 1.1 christos {
1220 1.1 christos /* We may need a .plt entry if the function this reloc
1221 1.1 christos refers to is in a shared lib. */
1222 1.1 christos h->plt.refcount += 1;
1223 1.1 christos }
1224 1.1 christos }
1225 1.1 christos
1226 1.1 christos /* If we are creating a shared library, and this is a reloc
1227 1.1 christos against a global symbol, or a non PC relative reloc
1228 1.1 christos against a local symbol, then we need to copy the reloc
1229 1.1 christos into the shared library. However, if we are linking with
1230 1.1 christos -Bsymbolic, we do not need to copy a reloc against a
1231 1.1 christos global symbol which is defined in an object we are
1232 1.1 christos including in the link (i.e., DEF_REGULAR is set). At
1233 1.1 christos this point we have not seen all the input files, so it is
1234 1.1 christos possible that DEF_REGULAR is not set now but will be set
1235 1.1 christos later (it is never cleared). In case of a weak definition,
1236 1.1 christos DEF_REGULAR may be cleared later by a strong definition in
1237 1.1 christos a shared library. We account for that possibility below by
1238 1.1 christos storing information in the relocs_copied field of the hash
1239 1.1 christos table entry. A similar situation occurs when creating
1240 1.1 christos shared libraries and symbol visibility changes render the
1241 1.1 christos symbol local.
1242 1.1 christos
1243 1.1 christos If on the other hand, we are creating an executable, we
1244 1.1 christos may need to keep relocations for symbols satisfied by a
1245 1.1 christos dynamic library if we manage to avoid copy relocs for the
1246 1.1 christos symbol. */
1247 1.1 christos if ((info->shared
1248 1.1 christos && (sec->flags & SEC_ALLOC) != 0
1249 1.1 christos && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1250 1.1 christos && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1251 1.1 christos && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1252 1.1 christos && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1253 1.1 christos && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1254 1.1 christos && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1255 1.1 christos && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1256 1.1 christos || (h != NULL
1257 1.1 christos && (! SYMBOLIC_BIND (info, h)
1258 1.1 christos || h->root.type == bfd_link_hash_defweak
1259 1.1 christos || !h->def_regular))))
1260 1.1 christos || (ELIMINATE_COPY_RELOCS
1261 1.1 christos && !info->shared
1262 1.1 christos && (sec->flags & SEC_ALLOC) != 0
1263 1.1 christos && h != NULL
1264 1.1 christos && (h->root.type == bfd_link_hash_defweak
1265 1.1 christos || !h->def_regular)))
1266 1.1 christos {
1267 1.1 christos struct elf_dyn_relocs *p;
1268 1.1 christos struct elf_dyn_relocs **head;
1269 1.1 christos
1270 1.1 christos /* We must copy these reloc types into the output file.
1271 1.1 christos Create a reloc section in dynobj and make room for
1272 1.1 christos this reloc. */
1273 1.1 christos if (sreloc == NULL)
1274 1.1 christos {
1275 1.1 christos if (htab->elf.dynobj == NULL)
1276 1.1 christos htab->elf.dynobj = abfd;
1277 1.1 christos
1278 1.1 christos sreloc = _bfd_elf_make_dynamic_reloc_section
1279 1.1 christos (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1280 1.1 christos
1281 1.1 christos if (sreloc == NULL)
1282 1.1 christos return FALSE;
1283 1.1 christos }
1284 1.1 christos
1285 1.1 christos /* If this is a global symbol, we count the number of
1286 1.1 christos relocations we need for this symbol. */
1287 1.1 christos if (h != NULL)
1288 1.1 christos {
1289 1.1 christos head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1290 1.1 christos }
1291 1.1 christos else
1292 1.1 christos {
1293 1.1 christos /* Track dynamic relocs needed for local syms too.
1294 1.1 christos We really need local syms available to do this
1295 1.1 christos easily. Oh well. */
1296 1.1 christos asection *s;
1297 1.1 christos void *vpp;
1298 1.1 christos
1299 1.1 christos isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1300 1.1 christos abfd, r_symndx);
1301 1.1 christos if (isym == NULL)
1302 1.1 christos return FALSE;
1303 1.1 christos
1304 1.1 christos s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1305 1.1 christos if (s == NULL)
1306 1.1 christos s = sec;
1307 1.1 christos
1308 1.1 christos vpp = &elf_section_data (s)->local_dynrel;
1309 1.1 christos head = (struct elf_dyn_relocs **) vpp;
1310 1.1 christos }
1311 1.1 christos
1312 1.1 christos p = *head;
1313 1.1 christos if (p == NULL || p->sec != sec)
1314 1.1 christos {
1315 1.1 christos bfd_size_type amt = sizeof *p;
1316 1.1 christos p = ((struct elf_dyn_relocs *)
1317 1.1 christos bfd_alloc (htab->elf.dynobj, amt));
1318 1.1 christos if (p == NULL)
1319 1.1 christos return FALSE;
1320 1.1 christos p->next = *head;
1321 1.1 christos *head = p;
1322 1.1 christos p->sec = sec;
1323 1.1 christos p->count = 0;
1324 1.1 christos p->pc_count = 0;
1325 1.1 christos }
1326 1.1 christos
1327 1.1 christos p->count += 1;
1328 1.1 christos if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1329 1.1 christos || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1330 1.1 christos || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1331 1.1 christos || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1332 1.1 christos || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1333 1.1 christos || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1334 1.1 christos || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1335 1.1 christos p->pc_count += 1;
1336 1.1 christos }
1337 1.1 christos break;
1338 1.1 christos
1339 1.1 christos /* This relocation describes the C++ object vtable hierarchy.
1340 1.1 christos Reconstruct it for later use during GC. */
1341 1.1 christos case R_390_GNU_VTINHERIT:
1342 1.1 christos if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1343 1.1 christos return FALSE;
1344 1.1 christos break;
1345 1.1 christos
1346 1.1 christos /* This relocation describes which C++ vtable entries are actually
1347 1.1 christos used. Record for later use during GC. */
1348 1.1 christos case R_390_GNU_VTENTRY:
1349 1.1 christos BFD_ASSERT (h != NULL);
1350 1.1 christos if (h != NULL
1351 1.1 christos && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1352 1.1 christos return FALSE;
1353 1.1 christos break;
1354 1.1 christos
1355 1.1 christos default:
1356 1.1 christos break;
1357 1.1 christos }
1358 1.1 christos }
1359 1.1 christos
1360 1.1 christos return TRUE;
1361 1.1 christos }
1362 1.1 christos
1363 1.1 christos /* Return the section that should be marked against GC for a given
1364 1.1 christos relocation. */
1365 1.1 christos
1366 1.1 christos static asection *
1367 1.1 christos elf_s390_gc_mark_hook (asection *sec,
1368 1.1 christos struct bfd_link_info *info,
1369 1.1 christos Elf_Internal_Rela *rel,
1370 1.1 christos struct elf_link_hash_entry *h,
1371 1.1 christos Elf_Internal_Sym *sym)
1372 1.1 christos {
1373 1.1 christos if (h != NULL)
1374 1.1 christos switch (ELF64_R_TYPE (rel->r_info))
1375 1.1 christos {
1376 1.1 christos case R_390_GNU_VTINHERIT:
1377 1.1 christos case R_390_GNU_VTENTRY:
1378 1.1 christos return NULL;
1379 1.1 christos }
1380 1.1 christos
1381 1.1 christos return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1382 1.1 christos }
1383 1.1 christos
1384 1.1 christos /* Update the got entry reference counts for the section being removed. */
1385 1.1 christos
1386 1.1 christos static bfd_boolean
1387 1.1 christos elf_s390_gc_sweep_hook (bfd *abfd,
1388 1.1 christos struct bfd_link_info *info,
1389 1.1 christos asection *sec,
1390 1.1 christos const Elf_Internal_Rela *relocs)
1391 1.1 christos {
1392 1.1 christos struct elf_s390_link_hash_table *htab;
1393 1.1 christos Elf_Internal_Shdr *symtab_hdr;
1394 1.1 christos struct elf_link_hash_entry **sym_hashes;
1395 1.1 christos bfd_signed_vma *local_got_refcounts;
1396 1.1 christos const Elf_Internal_Rela *rel, *relend;
1397 1.1 christos
1398 1.1 christos if (info->relocatable)
1399 1.1 christos return TRUE;
1400 1.1 christos
1401 1.1 christos htab = elf_s390_hash_table (info);
1402 1.1 christos if (htab == NULL)
1403 1.1 christos return FALSE;
1404 1.1 christos
1405 1.1 christos elf_section_data (sec)->local_dynrel = NULL;
1406 1.1 christos
1407 1.1 christos symtab_hdr = &elf_symtab_hdr (abfd);
1408 1.1 christos sym_hashes = elf_sym_hashes (abfd);
1409 1.1 christos local_got_refcounts = elf_local_got_refcounts (abfd);
1410 1.1 christos
1411 1.1 christos relend = relocs + sec->reloc_count;
1412 1.1 christos for (rel = relocs; rel < relend; rel++)
1413 1.1 christos {
1414 1.1 christos unsigned long r_symndx;
1415 1.1 christos unsigned int r_type;
1416 1.1 christos struct elf_link_hash_entry *h = NULL;
1417 1.1 christos
1418 1.1 christos r_symndx = ELF64_R_SYM (rel->r_info);
1419 1.1 christos if (r_symndx >= symtab_hdr->sh_info)
1420 1.1 christos {
1421 1.1 christos struct elf_s390_link_hash_entry *eh;
1422 1.1 christos struct elf_dyn_relocs **pp;
1423 1.1 christos struct elf_dyn_relocs *p;
1424 1.1 christos
1425 1.1 christos h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1426 1.1 christos while (h->root.type == bfd_link_hash_indirect
1427 1.1 christos || h->root.type == bfd_link_hash_warning)
1428 1.1 christos h = (struct elf_link_hash_entry *) h->root.u.i.link;
1429 1.1 christos eh = (struct elf_s390_link_hash_entry *) h;
1430 1.1 christos
1431 1.1 christos for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1432 1.1 christos if (p->sec == sec)
1433 1.1 christos {
1434 1.1 christos /* Everything must go for SEC. */
1435 1.1 christos *pp = p->next;
1436 1.1 christos break;
1437 1.1 christos }
1438 1.1 christos }
1439 1.1 christos else
1440 1.1 christos {
1441 1.1 christos Elf_Internal_Sym *isym;
1442 1.1 christos
1443 1.1 christos /* A local symbol. */
1444 1.1 christos isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1445 1.1 christos abfd, r_symndx);
1446 1.1 christos if (isym == NULL)
1447 1.1 christos return FALSE;
1448 1.1 christos
1449 1.1 christos if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1450 1.1 christos {
1451 1.1 christos struct plt_entry *plt = elf_s390_local_plt (abfd);
1452 1.1 christos if (plt[r_symndx].plt.refcount > 0)
1453 1.1 christos plt[r_symndx].plt.refcount--;
1454 1.1 christos }
1455 1.1 christos }
1456 1.1 christos
1457 1.1 christos r_type = ELF64_R_TYPE (rel->r_info);
1458 1.1 christos r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1459 1.1 christos switch (r_type)
1460 1.1 christos {
1461 1.1 christos case R_390_TLS_LDM64:
1462 1.1 christos if (htab->tls_ldm_got.refcount > 0)
1463 1.1 christos htab->tls_ldm_got.refcount -= 1;
1464 1.1 christos break;
1465 1.1 christos
1466 1.1 christos case R_390_TLS_GD64:
1467 1.1 christos case R_390_TLS_IE64:
1468 1.1 christos case R_390_TLS_GOTIE12:
1469 1.1 christos case R_390_TLS_GOTIE20:
1470 1.1 christos case R_390_TLS_GOTIE64:
1471 1.1 christos case R_390_TLS_IEENT:
1472 1.1 christos case R_390_GOT12:
1473 1.1 christos case R_390_GOT16:
1474 1.1 christos case R_390_GOT20:
1475 1.1 christos case R_390_GOT32:
1476 1.1 christos case R_390_GOT64:
1477 1.1 christos case R_390_GOTOFF16:
1478 1.1 christos case R_390_GOTOFF32:
1479 1.1 christos case R_390_GOTOFF64:
1480 1.1 christos case R_390_GOTPC:
1481 1.1 christos case R_390_GOTPCDBL:
1482 1.1 christos case R_390_GOTENT:
1483 1.1 christos if (h != NULL)
1484 1.1 christos {
1485 1.1 christos if (h->got.refcount > 0)
1486 1.1 christos h->got.refcount -= 1;
1487 1.1 christos }
1488 1.1 christos else if (local_got_refcounts != NULL)
1489 1.1 christos {
1490 1.1 christos if (local_got_refcounts[r_symndx] > 0)
1491 1.1 christos local_got_refcounts[r_symndx] -= 1;
1492 1.1 christos }
1493 1.1 christos break;
1494 1.1 christos
1495 1.1 christos case R_390_8:
1496 1.1 christos case R_390_12:
1497 1.1 christos case R_390_16:
1498 1.1 christos case R_390_20:
1499 1.1 christos case R_390_32:
1500 1.1 christos case R_390_64:
1501 1.1 christos case R_390_PC16:
1502 1.1 christos case R_390_PC12DBL:
1503 1.1 christos case R_390_PC16DBL:
1504 1.1 christos case R_390_PC24DBL:
1505 1.1 christos case R_390_PC32:
1506 1.1 christos case R_390_PC32DBL:
1507 1.1 christos case R_390_PC64:
1508 1.1 christos if (info->shared)
1509 1.1 christos break;
1510 1.1 christos /* Fall through */
1511 1.1 christos
1512 1.1 christos case R_390_PLT12DBL:
1513 1.1 christos case R_390_PLT16DBL:
1514 1.1 christos case R_390_PLT24DBL:
1515 1.1 christos case R_390_PLT32:
1516 1.1 christos case R_390_PLT32DBL:
1517 1.1 christos case R_390_PLT64:
1518 1.1 christos case R_390_PLTOFF16:
1519 1.1 christos case R_390_PLTOFF32:
1520 1.1 christos case R_390_PLTOFF64:
1521 1.1 christos if (h != NULL)
1522 1.1 christos {
1523 1.1 christos if (h->plt.refcount > 0)
1524 1.1 christos h->plt.refcount -= 1;
1525 1.1 christos }
1526 1.1 christos break;
1527 1.1 christos
1528 1.1 christos case R_390_GOTPLT12:
1529 1.1 christos case R_390_GOTPLT16:
1530 1.1 christos case R_390_GOTPLT20:
1531 1.1 christos case R_390_GOTPLT32:
1532 1.1 christos case R_390_GOTPLT64:
1533 1.1 christos case R_390_GOTPLTENT:
1534 1.1 christos if (h != NULL)
1535 1.1 christos {
1536 1.1 christos if (h->plt.refcount > 0)
1537 1.1 christos {
1538 1.1 christos ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1539 1.1 christos h->plt.refcount -= 1;
1540 1.1 christos }
1541 1.1 christos }
1542 1.1 christos else if (local_got_refcounts != NULL)
1543 1.1 christos {
1544 1.1 christos if (local_got_refcounts[r_symndx] > 0)
1545 1.1 christos local_got_refcounts[r_symndx] -= 1;
1546 1.1 christos }
1547 1.1 christos break;
1548 1.1 christos
1549 1.1 christos default:
1550 1.1 christos break;
1551 1.1 christos }
1552 1.1 christos }
1553 1.1 christos
1554 1.1 christos return TRUE;
1555 1.1 christos }
1556 1.1 christos
1557 1.1 christos /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1558 1.1 christos entry but we found we will not create any. Called when we find we will
1559 1.1 christos not have any PLT for this symbol, by for example
1560 1.1 christos elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1561 1.1 christos or elf_s390_size_dynamic_sections if no dynamic sections will be
1562 1.1 christos created (we're only linking static objects). */
1563 1.1 christos
1564 1.1 christos static void
1565 1.1 christos elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1566 1.1 christos {
1567 1.1 christos if (h->elf.root.type == bfd_link_hash_warning)
1568 1.1 christos h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1569 1.1 christos
1570 1.1 christos if (h->gotplt_refcount <= 0)
1571 1.1 christos return;
1572 1.1 christos
1573 1.1 christos /* We simply add the number of gotplt references to the number
1574 1.1 christos * of got references for this symbol. */
1575 1.1 christos h->elf.got.refcount += h->gotplt_refcount;
1576 1.1 christos h->gotplt_refcount = -1;
1577 1.1 christos }
1578 1.1 christos
1579 1.1 christos /* Adjust a symbol defined by a dynamic object and referenced by a
1580 1.1 christos regular object. The current definition is in some section of the
1581 1.1 christos dynamic object, but we're not including those sections. We have to
1582 1.1 christos change the definition to something the rest of the link can
1583 1.1 christos understand. */
1584 1.1 christos
1585 1.1 christos static bfd_boolean
1586 1.1 christos elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1587 1.1 christos struct elf_link_hash_entry *h)
1588 1.1 christos {
1589 1.1 christos struct elf_s390_link_hash_table *htab;
1590 1.1 christos asection *s;
1591 1.1 christos
1592 1.1 christos /* STT_GNU_IFUNC symbol must go through PLT. */
1593 1.1 christos if (s390_is_ifunc_symbol_p (h))
1594 1.1 christos return TRUE;
1595 1.1 christos
1596 1.1 christos /* If this is a function, put it in the procedure linkage table. We
1597 1.1 christos will fill in the contents of the procedure linkage table later
1598 1.1 christos (although we could actually do it here). */
1599 1.1 christos if (h->type == STT_FUNC
1600 1.1 christos || h->needs_plt)
1601 1.1 christos {
1602 1.1 christos if (h->plt.refcount <= 0
1603 1.1 christos || SYMBOL_CALLS_LOCAL (info, h)
1604 1.1 christos || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1605 1.1 christos && h->root.type == bfd_link_hash_undefweak))
1606 1.1 christos {
1607 1.1 christos /* This case can occur if we saw a PLT32 reloc in an input
1608 1.1 christos file, but the symbol was never referred to by a dynamic
1609 1.1 christos object, or if all references were garbage collected. In
1610 1.1 christos such a case, we don't actually need to build a procedure
1611 1.1 christos linkage table, and we can just do a PC32 reloc instead. */
1612 1.1 christos h->plt.offset = (bfd_vma) -1;
1613 1.1 christos h->needs_plt = 0;
1614 1.1 christos elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1615 1.1 christos }
1616 1.1 christos
1617 1.1 christos return TRUE;
1618 1.1 christos }
1619 1.1 christos else
1620 1.1 christos /* It's possible that we incorrectly decided a .plt reloc was
1621 1.1 christos needed for an R_390_PC32 reloc to a non-function sym in
1622 1.1 christos check_relocs. We can't decide accurately between function and
1623 1.1 christos non-function syms in check-relocs; Objects loaded later in
1624 1.1 christos the link may change h->type. So fix it now. */
1625 1.1 christos h->plt.offset = (bfd_vma) -1;
1626 1.1 christos
1627 1.1 christos /* If this is a weak symbol, and there is a real definition, the
1628 1.1 christos processor independent code will have arranged for us to see the
1629 1.1 christos real definition first, and we can just use the same value. */
1630 1.1 christos if (h->u.weakdef != NULL)
1631 1.1 christos {
1632 1.1 christos BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1633 1.1 christos || h->u.weakdef->root.type == bfd_link_hash_defweak);
1634 1.1 christos h->root.u.def.section = h->u.weakdef->root.u.def.section;
1635 1.1 christos h->root.u.def.value = h->u.weakdef->root.u.def.value;
1636 1.1 christos if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1637 1.1 christos h->non_got_ref = h->u.weakdef->non_got_ref;
1638 1.1 christos return TRUE;
1639 1.1 christos }
1640 1.1 christos
1641 1.1 christos /* This is a reference to a symbol defined by a dynamic object which
1642 1.1 christos is not a function. */
1643 1.1 christos
1644 1.1 christos /* If we are creating a shared library, we must presume that the
1645 1.1 christos only references to the symbol are via the global offset table.
1646 1.1 christos For such cases we need not do anything here; the relocations will
1647 1.1 christos be handled correctly by relocate_section. */
1648 1.1 christos if (info->shared)
1649 1.1 christos return TRUE;
1650 1.1 christos
1651 1.1 christos /* If there are no references to this symbol that do not use the
1652 1.1 christos GOT, we don't need to generate a copy reloc. */
1653 1.1 christos if (!h->non_got_ref)
1654 1.1 christos return TRUE;
1655 1.1 christos
1656 1.1 christos /* If -z nocopyreloc was given, we won't generate them either. */
1657 1.1 christos if (info->nocopyreloc)
1658 1.1 christos {
1659 1.1 christos h->non_got_ref = 0;
1660 1.1 christos return TRUE;
1661 1.1 christos }
1662 1.1 christos
1663 1.1 christos if (ELIMINATE_COPY_RELOCS)
1664 1.1 christos {
1665 1.1 christos struct elf_s390_link_hash_entry * eh;
1666 1.1 christos struct elf_dyn_relocs *p;
1667 1.1 christos
1668 1.1 christos eh = (struct elf_s390_link_hash_entry *) h;
1669 1.1 christos for (p = eh->dyn_relocs; p != NULL; p = p->next)
1670 1.1 christos {
1671 1.1 christos s = p->sec->output_section;
1672 1.1 christos if (s != NULL && (s->flags & SEC_READONLY) != 0)
1673 1.1 christos break;
1674 1.1 christos }
1675 1.1 christos
1676 1.1 christos /* If we didn't find any dynamic relocs in read-only sections, then
1677 1.1 christos we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1678 1.1 christos if (p == NULL)
1679 1.1 christos {
1680 1.1 christos h->non_got_ref = 0;
1681 1.1 christos return TRUE;
1682 1.1 christos }
1683 1.1 christos }
1684 1.1 christos
1685 1.1 christos /* We must allocate the symbol in our .dynbss section, which will
1686 1.1 christos become part of the .bss section of the executable. There will be
1687 1.1 christos an entry for this symbol in the .dynsym section. The dynamic
1688 1.1 christos object will contain position independent code, so all references
1689 1.1 christos from the dynamic object to this symbol will go through the global
1690 1.1 christos offset table. The dynamic linker will use the .dynsym entry to
1691 1.1 christos determine the address it must put in the global offset table, so
1692 1.1 christos both the dynamic object and the regular object will refer to the
1693 1.1 christos same memory location for the variable. */
1694 1.1 christos
1695 1.1 christos htab = elf_s390_hash_table (info);
1696 1.1 christos if (htab == NULL)
1697 1.1 christos return FALSE;
1698 1.1 christos
1699 1.1 christos /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1700 1.1 christos copy the initial value out of the dynamic object and into the
1701 1.1 christos runtime process image. */
1702 1.1 christos if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1703 1.1 christos {
1704 1.1 christos htab->srelbss->size += sizeof (Elf64_External_Rela);
1705 1.1 christos h->needs_copy = 1;
1706 1.1 christos }
1707 1.1 christos
1708 1.1 christos s = htab->sdynbss;
1709 1.1 christos
1710 1.1.1.2 christos return _bfd_elf_adjust_dynamic_copy (info, h, s);
1711 1.1 christos }
1712 1.1 christos
1713 1.1 christos /* Allocate space in .plt, .got and associated reloc sections for
1714 1.1 christos dynamic relocs. */
1715 1.1 christos
1716 1.1 christos static bfd_boolean
1717 1.1 christos allocate_dynrelocs (struct elf_link_hash_entry *h,
1718 1.1 christos void * inf)
1719 1.1 christos {
1720 1.1 christos struct bfd_link_info *info;
1721 1.1 christos struct elf_s390_link_hash_table *htab;
1722 1.1 christos struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1723 1.1 christos struct elf_dyn_relocs *p;
1724 1.1 christos
1725 1.1 christos if (h->root.type == bfd_link_hash_indirect)
1726 1.1 christos return TRUE;
1727 1.1 christos
1728 1.1 christos info = (struct bfd_link_info *) inf;
1729 1.1 christos htab = elf_s390_hash_table (info);
1730 1.1 christos if (htab == NULL)
1731 1.1 christos return FALSE;
1732 1.1 christos
1733 1.1 christos /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1734 1.1 christos here if it is defined and referenced in a non-shared object. */
1735 1.1 christos if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1736 1.1 christos return s390_elf_allocate_ifunc_dyn_relocs (info, h,
1737 1.1 christos &eh->dyn_relocs);
1738 1.1 christos else if (htab->elf.dynamic_sections_created
1739 1.1 christos && h->plt.refcount > 0)
1740 1.1 christos {
1741 1.1 christos /* Make sure this symbol is output as a dynamic symbol.
1742 1.1 christos Undefined weak syms won't yet be marked as dynamic. */
1743 1.1 christos if (h->dynindx == -1
1744 1.1 christos && !h->forced_local)
1745 1.1 christos {
1746 1.1 christos if (! bfd_elf_link_record_dynamic_symbol (info, h))
1747 1.1 christos return FALSE;
1748 1.1 christos }
1749 1.1 christos
1750 1.1 christos if (info->shared
1751 1.1 christos || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1752 1.1 christos {
1753 1.1 christos asection *s = htab->elf.splt;
1754 1.1 christos
1755 1.1 christos /* If this is the first .plt entry, make room for the special
1756 1.1 christos first entry. */
1757 1.1 christos if (s->size == 0)
1758 1.1 christos s->size += PLT_FIRST_ENTRY_SIZE;
1759 1.1 christos
1760 1.1 christos h->plt.offset = s->size;
1761 1.1 christos
1762 1.1 christos /* If this symbol is not defined in a regular file, and we are
1763 1.1 christos not generating a shared library, then set the symbol to this
1764 1.1 christos location in the .plt. This is required to make function
1765 1.1 christos pointers compare as equal between the normal executable and
1766 1.1 christos the shared library. */
1767 1.1 christos if (! info->shared
1768 1.1 christos && !h->def_regular)
1769 1.1 christos {
1770 1.1 christos h->root.u.def.section = s;
1771 1.1 christos h->root.u.def.value = h->plt.offset;
1772 1.1 christos }
1773 1.1 christos
1774 1.1 christos /* Make room for this entry. */
1775 1.1 christos s->size += PLT_ENTRY_SIZE;
1776 1.1 christos
1777 1.1 christos /* We also need to make an entry in the .got.plt section, which
1778 1.1 christos will be placed in the .got section by the linker script. */
1779 1.1 christos htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1780 1.1 christos
1781 1.1 christos /* We also need to make an entry in the .rela.plt section. */
1782 1.1 christos htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1783 1.1 christos }
1784 1.1 christos else
1785 1.1 christos {
1786 1.1 christos h->plt.offset = (bfd_vma) -1;
1787 1.1 christos h->needs_plt = 0;
1788 1.1 christos elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1789 1.1 christos }
1790 1.1 christos }
1791 1.1 christos else
1792 1.1 christos {
1793 1.1 christos h->plt.offset = (bfd_vma) -1;
1794 1.1 christos h->needs_plt = 0;
1795 1.1 christos elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1796 1.1 christos }
1797 1.1 christos
1798 1.1 christos /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1799 1.1 christos the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1800 1.1 christos to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1801 1.1 christos we can save the dynamic TLS relocation. */
1802 1.1 christos if (h->got.refcount > 0
1803 1.1 christos && !info->shared
1804 1.1 christos && h->dynindx == -1
1805 1.1 christos && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1806 1.1 christos {
1807 1.1 christos if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1808 1.1 christos /* For the GOTIE access without a literal pool entry the offset has
1809 1.1 christos to be stored somewhere. The immediate value in the instruction
1810 1.1 christos is not bit enough so the value is stored in the got. */
1811 1.1 christos {
1812 1.1 christos h->got.offset = htab->elf.sgot->size;
1813 1.1 christos htab->elf.sgot->size += GOT_ENTRY_SIZE;
1814 1.1 christos }
1815 1.1 christos else
1816 1.1 christos h->got.offset = (bfd_vma) -1;
1817 1.1 christos }
1818 1.1 christos else if (h->got.refcount > 0)
1819 1.1 christos {
1820 1.1 christos asection *s;
1821 1.1 christos bfd_boolean dyn;
1822 1.1 christos int tls_type = elf_s390_hash_entry(h)->tls_type;
1823 1.1 christos
1824 1.1 christos /* Make sure this symbol is output as a dynamic symbol.
1825 1.1 christos Undefined weak syms won't yet be marked as dynamic. */
1826 1.1 christos if (h->dynindx == -1
1827 1.1 christos && !h->forced_local)
1828 1.1 christos {
1829 1.1 christos if (! bfd_elf_link_record_dynamic_symbol (info, h))
1830 1.1 christos return FALSE;
1831 1.1 christos }
1832 1.1 christos
1833 1.1 christos s = htab->elf.sgot;
1834 1.1 christos h->got.offset = s->size;
1835 1.1 christos s->size += GOT_ENTRY_SIZE;
1836 1.1 christos /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1837 1.1 christos if (tls_type == GOT_TLS_GD)
1838 1.1 christos s->size += GOT_ENTRY_SIZE;
1839 1.1 christos dyn = htab->elf.dynamic_sections_created;
1840 1.1 christos /* R_390_TLS_IE64 needs one dynamic relocation,
1841 1.1 christos R_390_TLS_GD64 needs one if local symbol and two if global. */
1842 1.1 christos if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1843 1.1 christos || tls_type >= GOT_TLS_IE)
1844 1.1 christos htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1845 1.1 christos else if (tls_type == GOT_TLS_GD)
1846 1.1 christos htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1847 1.1 christos else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1848 1.1 christos || h->root.type != bfd_link_hash_undefweak)
1849 1.1 christos && (info->shared
1850 1.1 christos || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1851 1.1 christos htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1852 1.1 christos }
1853 1.1 christos else
1854 1.1 christos h->got.offset = (bfd_vma) -1;
1855 1.1 christos
1856 1.1 christos if (eh->dyn_relocs == NULL)
1857 1.1 christos return TRUE;
1858 1.1 christos
1859 1.1 christos /* In the shared -Bsymbolic case, discard space allocated for
1860 1.1 christos dynamic pc-relative relocs against symbols which turn out to be
1861 1.1 christos defined in regular objects. For the normal shared case, discard
1862 1.1 christos space for pc-relative relocs that have become local due to symbol
1863 1.1 christos visibility changes. */
1864 1.1 christos
1865 1.1 christos if (info->shared)
1866 1.1 christos {
1867 1.1 christos if (SYMBOL_CALLS_LOCAL (info, h))
1868 1.1 christos {
1869 1.1 christos struct elf_dyn_relocs **pp;
1870 1.1 christos
1871 1.1 christos for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1872 1.1 christos {
1873 1.1 christos p->count -= p->pc_count;
1874 1.1 christos p->pc_count = 0;
1875 1.1 christos if (p->count == 0)
1876 1.1 christos *pp = p->next;
1877 1.1 christos else
1878 1.1 christos pp = &p->next;
1879 1.1 christos }
1880 1.1 christos }
1881 1.1 christos
1882 1.1 christos /* Also discard relocs on undefined weak syms with non-default
1883 1.1 christos visibility. */
1884 1.1 christos if (eh->dyn_relocs != NULL
1885 1.1 christos && h->root.type == bfd_link_hash_undefweak)
1886 1.1 christos {
1887 1.1 christos if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1888 1.1 christos eh->dyn_relocs = NULL;
1889 1.1 christos
1890 1.1 christos /* Make sure undefined weak symbols are output as a dynamic
1891 1.1 christos symbol in PIEs. */
1892 1.1 christos else if (h->dynindx == -1
1893 1.1 christos && !h->forced_local)
1894 1.1 christos {
1895 1.1 christos if (! bfd_elf_link_record_dynamic_symbol (info, h))
1896 1.1 christos return FALSE;
1897 1.1 christos }
1898 1.1 christos }
1899 1.1 christos }
1900 1.1 christos else if (ELIMINATE_COPY_RELOCS)
1901 1.1 christos {
1902 1.1 christos /* For the non-shared case, discard space for relocs against
1903 1.1 christos symbols which turn out to need copy relocs or are not
1904 1.1 christos dynamic. */
1905 1.1 christos
1906 1.1 christos if (!h->non_got_ref
1907 1.1 christos && ((h->def_dynamic
1908 1.1 christos && !h->def_regular)
1909 1.1 christos || (htab->elf.dynamic_sections_created
1910 1.1 christos && (h->root.type == bfd_link_hash_undefweak
1911 1.1 christos || h->root.type == bfd_link_hash_undefined))))
1912 1.1 christos {
1913 1.1 christos /* Make sure this symbol is output as a dynamic symbol.
1914 1.1 christos Undefined weak syms won't yet be marked as dynamic. */
1915 1.1 christos if (h->dynindx == -1
1916 1.1 christos && !h->forced_local)
1917 1.1 christos {
1918 1.1 christos if (! bfd_elf_link_record_dynamic_symbol (info, h))
1919 1.1 christos return FALSE;
1920 1.1 christos }
1921 1.1 christos
1922 1.1 christos /* If that succeeded, we know we'll be keeping all the
1923 1.1 christos relocs. */
1924 1.1 christos if (h->dynindx != -1)
1925 1.1 christos goto keep;
1926 1.1 christos }
1927 1.1 christos
1928 1.1 christos eh->dyn_relocs = NULL;
1929 1.1 christos
1930 1.1 christos keep: ;
1931 1.1 christos }
1932 1.1 christos
1933 1.1 christos /* Finally, allocate space. */
1934 1.1 christos for (p = eh->dyn_relocs; p != NULL; p = p->next)
1935 1.1 christos {
1936 1.1 christos asection *sreloc = elf_section_data (p->sec)->sreloc;
1937 1.1 christos sreloc->size += p->count * sizeof (Elf64_External_Rela);
1938 1.1 christos }
1939 1.1 christos
1940 1.1 christos return TRUE;
1941 1.1 christos }
1942 1.1 christos
1943 1.1 christos /* Find any dynamic relocs that apply to read-only sections. */
1944 1.1 christos
1945 1.1 christos static bfd_boolean
1946 1.1 christos readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1947 1.1 christos {
1948 1.1 christos struct elf_s390_link_hash_entry *eh;
1949 1.1 christos struct elf_dyn_relocs *p;
1950 1.1 christos
1951 1.1 christos eh = (struct elf_s390_link_hash_entry *) h;
1952 1.1 christos for (p = eh->dyn_relocs; p != NULL; p = p->next)
1953 1.1 christos {
1954 1.1 christos asection *s = p->sec->output_section;
1955 1.1 christos
1956 1.1 christos if (s != NULL && (s->flags & SEC_READONLY) != 0)
1957 1.1 christos {
1958 1.1 christos struct bfd_link_info *info = (struct bfd_link_info *) inf;
1959 1.1 christos
1960 1.1 christos info->flags |= DF_TEXTREL;
1961 1.1 christos
1962 1.1 christos /* Not an error, just cut short the traversal. */
1963 1.1 christos return FALSE;
1964 1.1 christos }
1965 1.1 christos }
1966 1.1 christos return TRUE;
1967 1.1 christos }
1968 1.1 christos
1969 1.1 christos /* Set the sizes of the dynamic sections. */
1970 1.1 christos
1971 1.1 christos static bfd_boolean
1972 1.1 christos elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1973 1.1 christos struct bfd_link_info *info)
1974 1.1 christos {
1975 1.1 christos struct elf_s390_link_hash_table *htab;
1976 1.1 christos bfd *dynobj;
1977 1.1 christos asection *s;
1978 1.1 christos bfd_boolean relocs;
1979 1.1 christos bfd *ibfd;
1980 1.1 christos
1981 1.1 christos htab = elf_s390_hash_table (info);
1982 1.1 christos if (htab == NULL)
1983 1.1 christos return FALSE;
1984 1.1 christos
1985 1.1 christos dynobj = htab->elf.dynobj;
1986 1.1 christos if (dynobj == NULL)
1987 1.1 christos abort ();
1988 1.1 christos
1989 1.1 christos if (htab->elf.dynamic_sections_created)
1990 1.1 christos {
1991 1.1 christos /* Set the contents of the .interp section to the interpreter. */
1992 1.1 christos if (info->executable)
1993 1.1 christos {
1994 1.1 christos s = bfd_get_linker_section (dynobj, ".interp");
1995 1.1 christos if (s == NULL)
1996 1.1 christos abort ();
1997 1.1 christos s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1998 1.1 christos s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1999 1.1 christos }
2000 1.1 christos }
2001 1.1 christos
2002 1.1 christos /* Set up .got offsets for local syms, and space for local dynamic
2003 1.1 christos relocs. */
2004 1.1.1.2 christos for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2005 1.1 christos {
2006 1.1 christos bfd_signed_vma *local_got;
2007 1.1 christos bfd_signed_vma *end_local_got;
2008 1.1 christos char *local_tls_type;
2009 1.1 christos bfd_size_type locsymcount;
2010 1.1 christos Elf_Internal_Shdr *symtab_hdr;
2011 1.1 christos asection *srela;
2012 1.1 christos struct plt_entry *local_plt;
2013 1.1 christos unsigned int i;
2014 1.1 christos
2015 1.1 christos if (! is_s390_elf (ibfd))
2016 1.1 christos continue;
2017 1.1 christos
2018 1.1 christos for (s = ibfd->sections; s != NULL; s = s->next)
2019 1.1 christos {
2020 1.1 christos struct elf_dyn_relocs *p;
2021 1.1 christos
2022 1.1 christos for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2023 1.1 christos {
2024 1.1 christos if (!bfd_is_abs_section (p->sec)
2025 1.1 christos && bfd_is_abs_section (p->sec->output_section))
2026 1.1 christos {
2027 1.1 christos /* Input section has been discarded, either because
2028 1.1 christos it is a copy of a linkonce section or due to
2029 1.1 christos linker script /DISCARD/, so we'll be discarding
2030 1.1 christos the relocs too. */
2031 1.1 christos }
2032 1.1 christos else if (p->count != 0)
2033 1.1 christos {
2034 1.1 christos srela = elf_section_data (p->sec)->sreloc;
2035 1.1 christos srela->size += p->count * sizeof (Elf64_External_Rela);
2036 1.1 christos if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2037 1.1 christos info->flags |= DF_TEXTREL;
2038 1.1 christos }
2039 1.1 christos }
2040 1.1 christos }
2041 1.1 christos
2042 1.1 christos local_got = elf_local_got_refcounts (ibfd);
2043 1.1 christos if (!local_got)
2044 1.1 christos continue;
2045 1.1 christos
2046 1.1 christos symtab_hdr = &elf_symtab_hdr (ibfd);
2047 1.1 christos locsymcount = symtab_hdr->sh_info;
2048 1.1 christos end_local_got = local_got + locsymcount;
2049 1.1 christos local_tls_type = elf_s390_local_got_tls_type (ibfd);
2050 1.1 christos s = htab->elf.sgot;
2051 1.1 christos srela = htab->elf.srelgot;
2052 1.1 christos for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2053 1.1 christos {
2054 1.1 christos if (*local_got > 0)
2055 1.1 christos {
2056 1.1 christos *local_got = s->size;
2057 1.1 christos s->size += GOT_ENTRY_SIZE;
2058 1.1 christos if (*local_tls_type == GOT_TLS_GD)
2059 1.1 christos s->size += GOT_ENTRY_SIZE;
2060 1.1 christos if (info->shared)
2061 1.1 christos srela->size += sizeof (Elf64_External_Rela);
2062 1.1 christos }
2063 1.1 christos else
2064 1.1 christos *local_got = (bfd_vma) -1;
2065 1.1 christos }
2066 1.1 christos
2067 1.1 christos local_plt = elf_s390_local_plt (ibfd);
2068 1.1 christos for (i = 0; i < symtab_hdr->sh_info; i++)
2069 1.1 christos {
2070 1.1 christos if (local_plt[i].plt.refcount > 0)
2071 1.1 christos {
2072 1.1 christos local_plt[i].plt.offset = htab->elf.iplt->size;
2073 1.1 christos htab->elf.iplt->size += PLT_ENTRY_SIZE;
2074 1.1 christos htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2075 1.1 christos htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
2076 1.1 christos }
2077 1.1 christos else
2078 1.1 christos local_plt[i].plt.offset = (bfd_vma) -1;
2079 1.1 christos }
2080 1.1 christos }
2081 1.1 christos
2082 1.1 christos if (htab->tls_ldm_got.refcount > 0)
2083 1.1 christos {
2084 1.1 christos /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2085 1.1 christos relocs. */
2086 1.1 christos htab->tls_ldm_got.offset = htab->elf.sgot->size;
2087 1.1 christos htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2088 1.1 christos htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
2089 1.1 christos }
2090 1.1 christos else
2091 1.1 christos htab->tls_ldm_got.offset = -1;
2092 1.1 christos
2093 1.1 christos /* Allocate global sym .plt and .got entries, and space for global
2094 1.1 christos sym dynamic relocs. */
2095 1.1 christos elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2096 1.1 christos
2097 1.1 christos /* We now have determined the sizes of the various dynamic sections.
2098 1.1 christos Allocate memory for them. */
2099 1.1 christos relocs = FALSE;
2100 1.1 christos for (s = dynobj->sections; s != NULL; s = s->next)
2101 1.1 christos {
2102 1.1 christos if ((s->flags & SEC_LINKER_CREATED) == 0)
2103 1.1 christos continue;
2104 1.1 christos
2105 1.1 christos if (s == htab->elf.splt
2106 1.1 christos || s == htab->elf.sgot
2107 1.1 christos || s == htab->elf.sgotplt
2108 1.1 christos || s == htab->sdynbss
2109 1.1 christos || s == htab->elf.iplt
2110 1.1 christos || s == htab->elf.igotplt
2111 1.1 christos || s == htab->irelifunc)
2112 1.1 christos {
2113 1.1 christos /* Strip this section if we don't need it; see the
2114 1.1 christos comment below. */
2115 1.1 christos }
2116 1.1 christos else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2117 1.1 christos {
2118 1.1 christos if (s->size != 0 && s != htab->elf.srelplt)
2119 1.1 christos relocs = TRUE;
2120 1.1 christos
2121 1.1 christos /* We use the reloc_count field as a counter if we need
2122 1.1 christos to copy relocs into the output file. */
2123 1.1 christos s->reloc_count = 0;
2124 1.1 christos }
2125 1.1 christos else
2126 1.1 christos {
2127 1.1 christos /* It's not one of our sections, so don't allocate space. */
2128 1.1 christos continue;
2129 1.1 christos }
2130 1.1 christos
2131 1.1 christos if (s->size == 0)
2132 1.1 christos {
2133 1.1 christos /* If we don't need this section, strip it from the
2134 1.1 christos output file. This is to handle .rela.bss and
2135 1.1 christos .rela.plt. We must create it in
2136 1.1 christos create_dynamic_sections, because it must be created
2137 1.1 christos before the linker maps input sections to output
2138 1.1 christos sections. The linker does that before
2139 1.1 christos adjust_dynamic_symbol is called, and it is that
2140 1.1 christos function which decides whether anything needs to go
2141 1.1 christos into these sections. */
2142 1.1 christos
2143 1.1 christos s->flags |= SEC_EXCLUDE;
2144 1.1 christos continue;
2145 1.1 christos }
2146 1.1 christos
2147 1.1 christos if ((s->flags & SEC_HAS_CONTENTS) == 0)
2148 1.1 christos continue;
2149 1.1 christos
2150 1.1 christos /* Allocate memory for the section contents. We use bfd_zalloc
2151 1.1 christos here in case unused entries are not reclaimed before the
2152 1.1 christos section's contents are written out. This should not happen,
2153 1.1 christos but this way if it does, we get a R_390_NONE reloc instead
2154 1.1 christos of garbage. */
2155 1.1 christos s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2156 1.1 christos if (s->contents == NULL)
2157 1.1 christos return FALSE;
2158 1.1 christos }
2159 1.1 christos
2160 1.1 christos if (htab->elf.dynamic_sections_created)
2161 1.1 christos {
2162 1.1 christos /* Add some entries to the .dynamic section. We fill in the
2163 1.1 christos values later, in elf_s390_finish_dynamic_sections, but we
2164 1.1 christos must add the entries now so that we get the correct size for
2165 1.1 christos the .dynamic section. The DT_DEBUG entry is filled in by the
2166 1.1 christos dynamic linker and used by the debugger. */
2167 1.1 christos #define add_dynamic_entry(TAG, VAL) \
2168 1.1 christos _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2169 1.1 christos
2170 1.1 christos if (info->executable)
2171 1.1 christos {
2172 1.1 christos if (!add_dynamic_entry (DT_DEBUG, 0))
2173 1.1 christos return FALSE;
2174 1.1 christos }
2175 1.1 christos
2176 1.1 christos if (htab->elf.splt->size != 0)
2177 1.1 christos {
2178 1.1 christos if (!add_dynamic_entry (DT_PLTGOT, 0)
2179 1.1 christos || !add_dynamic_entry (DT_PLTRELSZ, 0)
2180 1.1 christos || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2181 1.1 christos || !add_dynamic_entry (DT_JMPREL, 0))
2182 1.1 christos return FALSE;
2183 1.1 christos }
2184 1.1 christos
2185 1.1 christos if (relocs)
2186 1.1 christos {
2187 1.1 christos if (!add_dynamic_entry (DT_RELA, 0)
2188 1.1 christos || !add_dynamic_entry (DT_RELASZ, 0)
2189 1.1 christos || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2190 1.1 christos return FALSE;
2191 1.1 christos
2192 1.1 christos /* If any dynamic relocs apply to a read-only section,
2193 1.1 christos then we need a DT_TEXTREL entry. */
2194 1.1 christos if ((info->flags & DF_TEXTREL) == 0)
2195 1.1 christos elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2196 1.1 christos info);
2197 1.1 christos
2198 1.1 christos if ((info->flags & DF_TEXTREL) != 0)
2199 1.1 christos {
2200 1.1 christos if (!add_dynamic_entry (DT_TEXTREL, 0))
2201 1.1 christos return FALSE;
2202 1.1 christos }
2203 1.1 christos }
2204 1.1 christos }
2205 1.1 christos #undef add_dynamic_entry
2206 1.1 christos
2207 1.1 christos return TRUE;
2208 1.1 christos }
2209 1.1 christos
2210 1.1 christos /* Return the base VMA address which should be subtracted from real addresses
2211 1.1 christos when resolving @dtpoff relocation.
2212 1.1 christos This is PT_TLS segment p_vaddr. */
2213 1.1 christos
2214 1.1 christos static bfd_vma
2215 1.1 christos dtpoff_base (struct bfd_link_info *info)
2216 1.1 christos {
2217 1.1 christos /* If tls_sec is NULL, we should have signalled an error already. */
2218 1.1 christos if (elf_hash_table (info)->tls_sec == NULL)
2219 1.1 christos return 0;
2220 1.1 christos return elf_hash_table (info)->tls_sec->vma;
2221 1.1 christos }
2222 1.1 christos
2223 1.1 christos /* Return the relocation value for @tpoff relocation
2224 1.1 christos if STT_TLS virtual address is ADDRESS. */
2225 1.1 christos
2226 1.1 christos static bfd_vma
2227 1.1 christos tpoff (struct bfd_link_info *info, bfd_vma address)
2228 1.1 christos {
2229 1.1 christos struct elf_link_hash_table *htab = elf_hash_table (info);
2230 1.1 christos
2231 1.1 christos /* If tls_sec is NULL, we should have signalled an error already. */
2232 1.1 christos if (htab->tls_sec == NULL)
2233 1.1 christos return 0;
2234 1.1 christos return htab->tls_size + htab->tls_sec->vma - address;
2235 1.1 christos }
2236 1.1 christos
2237 1.1 christos /* Complain if TLS instruction relocation is against an invalid
2238 1.1 christos instruction. */
2239 1.1 christos
2240 1.1 christos static void
2241 1.1 christos invalid_tls_insn (bfd *input_bfd,
2242 1.1 christos asection *input_section,
2243 1.1 christos Elf_Internal_Rela *rel)
2244 1.1 christos {
2245 1.1 christos reloc_howto_type *howto;
2246 1.1 christos
2247 1.1 christos howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2248 1.1 christos (*_bfd_error_handler)
2249 1.1 christos (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2250 1.1 christos input_bfd,
2251 1.1 christos input_section,
2252 1.1 christos (long) rel->r_offset,
2253 1.1 christos howto->name);
2254 1.1 christos bfd_set_error (bfd_error_bad_value);
2255 1.1 christos }
2256 1.1 christos
2257 1.1 christos /* Relocate a 390 ELF section. */
2258 1.1 christos
2259 1.1 christos static bfd_boolean
2260 1.1 christos elf_s390_relocate_section (bfd *output_bfd,
2261 1.1 christos struct bfd_link_info *info,
2262 1.1 christos bfd *input_bfd,
2263 1.1 christos asection *input_section,
2264 1.1 christos bfd_byte *contents,
2265 1.1 christos Elf_Internal_Rela *relocs,
2266 1.1 christos Elf_Internal_Sym *local_syms,
2267 1.1 christos asection **local_sections)
2268 1.1 christos {
2269 1.1 christos struct elf_s390_link_hash_table *htab;
2270 1.1 christos Elf_Internal_Shdr *symtab_hdr;
2271 1.1 christos struct elf_link_hash_entry **sym_hashes;
2272 1.1 christos bfd_vma *local_got_offsets;
2273 1.1 christos Elf_Internal_Rela *rel;
2274 1.1 christos Elf_Internal_Rela *relend;
2275 1.1 christos
2276 1.1 christos BFD_ASSERT (is_s390_elf (input_bfd));
2277 1.1 christos
2278 1.1 christos htab = elf_s390_hash_table (info);
2279 1.1 christos if (htab == NULL)
2280 1.1 christos return FALSE;
2281 1.1 christos
2282 1.1 christos symtab_hdr = &elf_symtab_hdr (input_bfd);
2283 1.1 christos sym_hashes = elf_sym_hashes (input_bfd);
2284 1.1 christos local_got_offsets = elf_local_got_offsets (input_bfd);
2285 1.1 christos
2286 1.1 christos rel = relocs;
2287 1.1 christos relend = relocs + input_section->reloc_count;
2288 1.1 christos for (; rel < relend; rel++)
2289 1.1 christos {
2290 1.1 christos unsigned int r_type;
2291 1.1 christos reloc_howto_type *howto;
2292 1.1 christos unsigned long r_symndx;
2293 1.1 christos struct elf_link_hash_entry *h;
2294 1.1 christos Elf_Internal_Sym *sym;
2295 1.1 christos asection *sec;
2296 1.1 christos bfd_vma off;
2297 1.1 christos bfd_vma relocation;
2298 1.1 christos bfd_boolean unresolved_reloc;
2299 1.1 christos bfd_reloc_status_type r;
2300 1.1 christos int tls_type;
2301 1.1 christos asection *base_got = htab->elf.sgot;
2302 1.1 christos
2303 1.1 christos r_type = ELF64_R_TYPE (rel->r_info);
2304 1.1 christos if (r_type == (int) R_390_GNU_VTINHERIT
2305 1.1 christos || r_type == (int) R_390_GNU_VTENTRY)
2306 1.1 christos continue;
2307 1.1 christos if (r_type >= (int) R_390_max)
2308 1.1 christos {
2309 1.1 christos bfd_set_error (bfd_error_bad_value);
2310 1.1 christos return FALSE;
2311 1.1 christos }
2312 1.1 christos
2313 1.1 christos howto = elf_howto_table + r_type;
2314 1.1 christos r_symndx = ELF64_R_SYM (rel->r_info);
2315 1.1 christos
2316 1.1 christos h = NULL;
2317 1.1 christos sym = NULL;
2318 1.1 christos sec = NULL;
2319 1.1 christos unresolved_reloc = FALSE;
2320 1.1 christos if (r_symndx < symtab_hdr->sh_info)
2321 1.1 christos {
2322 1.1 christos sym = local_syms + r_symndx;
2323 1.1 christos sec = local_sections[r_symndx];
2324 1.1 christos
2325 1.1 christos if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2326 1.1 christos {
2327 1.1 christos struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2328 1.1 christos if (local_plt == NULL)
2329 1.1 christos return FALSE;
2330 1.1 christos
2331 1.1 christos /* Address of the PLT slot. */
2332 1.1 christos relocation = (htab->elf.iplt->output_section->vma
2333 1.1 christos + htab->elf.iplt->output_offset
2334 1.1 christos + local_plt[r_symndx].plt.offset);
2335 1.1 christos
2336 1.1 christos switch (r_type)
2337 1.1 christos {
2338 1.1 christos case R_390_PLTOFF16:
2339 1.1 christos case R_390_PLTOFF32:
2340 1.1 christos case R_390_PLTOFF64:
2341 1.1 christos relocation -= htab->elf.sgot->output_section->vma;
2342 1.1 christos break;
2343 1.1 christos case R_390_GOTPLT12:
2344 1.1 christos case R_390_GOTPLT16:
2345 1.1 christos case R_390_GOTPLT20:
2346 1.1 christos case R_390_GOTPLT32:
2347 1.1 christos case R_390_GOTPLT64:
2348 1.1 christos case R_390_GOTPLTENT:
2349 1.1 christos case R_390_GOT12:
2350 1.1 christos case R_390_GOT16:
2351 1.1 christos case R_390_GOT20:
2352 1.1 christos case R_390_GOT32:
2353 1.1 christos case R_390_GOT64:
2354 1.1 christos case R_390_GOTENT:
2355 1.1 christos {
2356 1.1 christos /* Write the PLT slot address into the GOT slot. */
2357 1.1 christos bfd_put_64 (output_bfd, relocation,
2358 1.1 christos htab->elf.sgot->contents +
2359 1.1 christos local_got_offsets[r_symndx]);
2360 1.1 christos relocation = (local_got_offsets[r_symndx] +
2361 1.1 christos htab->elf.sgot->output_offset);
2362 1.1 christos
2363 1.1 christos if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2364 1.1 christos relocation += htab->elf.sgot->output_section->vma;
2365 1.1 christos break;
2366 1.1 christos }
2367 1.1 christos default:
2368 1.1 christos break;
2369 1.1 christos }
2370 1.1 christos /* The output section is needed later in
2371 1.1 christos finish_dynamic_section when creating the dynamic
2372 1.1 christos relocation. */
2373 1.1 christos local_plt[r_symndx].sec = sec;
2374 1.1 christos goto do_relocation;
2375 1.1 christos }
2376 1.1 christos else
2377 1.1 christos relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2378 1.1 christos }
2379 1.1 christos else
2380 1.1 christos {
2381 1.1 christos bfd_boolean warned ATTRIBUTE_UNUSED;
2382 1.1 christos bfd_boolean ignored ATTRIBUTE_UNUSED;
2383 1.1 christos
2384 1.1 christos RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2385 1.1 christos r_symndx, symtab_hdr, sym_hashes,
2386 1.1 christos h, sec, relocation,
2387 1.1 christos unresolved_reloc, warned, ignored);
2388 1.1 christos }
2389 1.1 christos
2390 1.1 christos if (sec != NULL && discarded_section (sec))
2391 1.1 christos RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2392 1.1 christos rel, 1, relend, howto, 0, contents);
2393 1.1 christos
2394 1.1 christos if (info->relocatable)
2395 1.1 christos continue;
2396 1.1 christos
2397 1.1 christos switch (r_type)
2398 1.1 christos {
2399 1.1 christos case R_390_GOTPLT12:
2400 1.1 christos case R_390_GOTPLT16:
2401 1.1 christos case R_390_GOTPLT20:
2402 1.1 christos case R_390_GOTPLT32:
2403 1.1 christos case R_390_GOTPLT64:
2404 1.1 christos case R_390_GOTPLTENT:
2405 1.1 christos /* There are three cases for a GOTPLT relocation. 1) The
2406 1.1 christos relocation is against the jump slot entry of a plt that
2407 1.1 christos will get emitted to the output file. 2) The relocation
2408 1.1 christos is against the jump slot of a plt entry that has been
2409 1.1 christos removed. elf_s390_adjust_gotplt has created a GOT entry
2410 1.1 christos as replacement. 3) The relocation is against a local symbol.
2411 1.1 christos Cases 2) and 3) are the same as the GOT relocation code
2412 1.1 christos so we just have to test for case 1 and fall through for
2413 1.1 christos the other two. */
2414 1.1 christos if (h != NULL && h->plt.offset != (bfd_vma) -1)
2415 1.1 christos {
2416 1.1 christos bfd_vma plt_index;
2417 1.1 christos
2418 1.1 christos if (s390_is_ifunc_symbol_p (h))
2419 1.1 christos {
2420 1.1 christos plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2421 1.1 christos relocation = (plt_index * GOT_ENTRY_SIZE +
2422 1.1 christos htab->elf.igotplt->output_offset);
2423 1.1 christos if (r_type == R_390_GOTPLTENT)
2424 1.1 christos relocation += htab->elf.igotplt->output_section->vma;
2425 1.1 christos }
2426 1.1 christos else
2427 1.1 christos {
2428 1.1 christos /* Calc. index no.
2429 1.1 christos Current offset - size first entry / entry size. */
2430 1.1 christos plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2431 1.1 christos PLT_ENTRY_SIZE;
2432 1.1 christos
2433 1.1 christos /* Offset in GOT is PLT index plus GOT headers(3)
2434 1.1 christos times 4, addr & GOT addr. */
2435 1.1 christos relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2436 1.1 christos if (r_type == R_390_GOTPLTENT)
2437 1.1 christos relocation += htab->elf.sgot->output_section->vma;
2438 1.1 christos }
2439 1.1 christos unresolved_reloc = FALSE;
2440 1.1 christos break;
2441 1.1 christos }
2442 1.1 christos /* Fall through. */
2443 1.1 christos
2444 1.1 christos case R_390_GOT12:
2445 1.1 christos case R_390_GOT16:
2446 1.1 christos case R_390_GOT20:
2447 1.1 christos case R_390_GOT32:
2448 1.1 christos case R_390_GOT64:
2449 1.1 christos case R_390_GOTENT:
2450 1.1 christos /* Relocation is to the entry for this symbol in the global
2451 1.1 christos offset table. */
2452 1.1 christos if (base_got == NULL)
2453 1.1 christos abort ();
2454 1.1 christos
2455 1.1 christos if (h != NULL)
2456 1.1 christos {
2457 1.1 christos bfd_boolean dyn;
2458 1.1 christos
2459 1.1 christos off = h->got.offset;
2460 1.1 christos dyn = htab->elf.dynamic_sections_created;
2461 1.1 christos
2462 1.1 christos if (s390_is_ifunc_symbol_p (h))
2463 1.1 christos {
2464 1.1 christos BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2465 1.1 christos if (off == (bfd_vma)-1)
2466 1.1 christos {
2467 1.1 christos /* No explicit GOT usage so redirect to the
2468 1.1 christos got.iplt slot. */
2469 1.1 christos base_got = htab->elf.igotplt;
2470 1.1 christos off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2471 1.1 christos }
2472 1.1 christos else
2473 1.1 christos {
2474 1.1 christos /* Explicit GOT slots must contain the address
2475 1.1 christos of the PLT slot. This will be handled in
2476 1.1 christos finish_dynamic_symbol. */
2477 1.1 christos }
2478 1.1 christos }
2479 1.1 christos else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2480 1.1 christos || (info->shared
2481 1.1 christos && SYMBOL_REFERENCES_LOCAL (info, h))
2482 1.1 christos || (ELF_ST_VISIBILITY (h->other)
2483 1.1 christos && h->root.type == bfd_link_hash_undefweak))
2484 1.1 christos {
2485 1.1 christos /* This is actually a static link, or it is a
2486 1.1 christos -Bsymbolic link and the symbol is defined
2487 1.1 christos locally, or the symbol was forced to be local
2488 1.1 christos because of a version file. We must initialize
2489 1.1 christos this entry in the global offset table. Since the
2490 1.1 christos offset must always be a multiple of 2, we use the
2491 1.1 christos least significant bit to record whether we have
2492 1.1 christos initialized it already.
2493 1.1 christos
2494 1.1 christos When doing a dynamic link, we create a .rel.got
2495 1.1 christos relocation entry to initialize the value. This
2496 1.1 christos is done in the finish_dynamic_symbol routine. */
2497 1.1 christos if ((off & 1) != 0)
2498 1.1 christos off &= ~1;
2499 1.1 christos else
2500 1.1 christos {
2501 1.1 christos bfd_put_64 (output_bfd, relocation,
2502 1.1 christos base_got->contents + off);
2503 1.1 christos h->got.offset |= 1;
2504 1.1 christos }
2505 1.1 christos
2506 1.1 christos if ((h->def_regular
2507 1.1 christos && info->shared
2508 1.1 christos && SYMBOL_REFERENCES_LOCAL (info, h))
2509 1.1 christos /* lgrl rx,sym@GOTENT -> larl rx, sym */
2510 1.1 christos && ((r_type == R_390_GOTENT
2511 1.1 christos && (bfd_get_16 (input_bfd,
2512 1.1 christos contents + rel->r_offset - 2)
2513 1.1 christos & 0xff0f) == 0xc408)
2514 1.1 christos /* lg rx, sym@GOT(r12) -> larl rx, sym */
2515 1.1 christos || (r_type == R_390_GOT20
2516 1.1 christos && (bfd_get_32 (input_bfd,
2517 1.1 christos contents + rel->r_offset - 2)
2518 1.1 christos & 0xff00f000) == 0xe300c000
2519 1.1 christos && bfd_get_8 (input_bfd,
2520 1.1 christos contents + rel->r_offset + 3) == 0x04)))
2521 1.1 christos
2522 1.1 christos {
2523 1.1 christos unsigned short new_insn =
2524 1.1 christos (0xc000 | (bfd_get_8 (input_bfd,
2525 1.1 christos contents + rel->r_offset - 1) & 0xf0));
2526 1.1 christos bfd_put_16 (output_bfd, new_insn,
2527 1.1 christos contents + rel->r_offset - 2);
2528 1.1 christos r_type = R_390_PC32DBL;
2529 1.1 christos rel->r_addend = 2;
2530 1.1 christos howto = elf_howto_table + r_type;
2531 1.1 christos relocation = h->root.u.def.value
2532 1.1 christos + h->root.u.def.section->output_section->vma
2533 1.1 christos + h->root.u.def.section->output_offset;
2534 1.1 christos goto do_relocation;
2535 1.1 christos }
2536 1.1 christos }
2537 1.1 christos else
2538 1.1 christos unresolved_reloc = FALSE;
2539 1.1 christos }
2540 1.1 christos else
2541 1.1 christos {
2542 1.1 christos if (local_got_offsets == NULL)
2543 1.1 christos abort ();
2544 1.1 christos
2545 1.1 christos off = local_got_offsets[r_symndx];
2546 1.1 christos
2547 1.1 christos /* The offset must always be a multiple of 8. We use
2548 1.1 christos the least significant bit to record whether we have
2549 1.1 christos already generated the necessary reloc. */
2550 1.1 christos if ((off & 1) != 0)
2551 1.1 christos off &= ~1;
2552 1.1 christos else
2553 1.1 christos {
2554 1.1 christos bfd_put_64 (output_bfd, relocation,
2555 1.1 christos htab->elf.sgot->contents + off);
2556 1.1 christos
2557 1.1 christos if (info->shared)
2558 1.1 christos {
2559 1.1 christos asection *s;
2560 1.1 christos Elf_Internal_Rela outrel;
2561 1.1 christos bfd_byte *loc;
2562 1.1 christos
2563 1.1 christos s = htab->elf.srelgot;
2564 1.1 christos if (s == NULL)
2565 1.1 christos abort ();
2566 1.1 christos
2567 1.1 christos outrel.r_offset = (htab->elf.sgot->output_section->vma
2568 1.1 christos + htab->elf.sgot->output_offset
2569 1.1 christos + off);
2570 1.1 christos outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2571 1.1 christos outrel.r_addend = relocation;
2572 1.1 christos loc = s->contents;
2573 1.1 christos loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2574 1.1 christos bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2575 1.1 christos }
2576 1.1 christos
2577 1.1 christos local_got_offsets[r_symndx] |= 1;
2578 1.1 christos }
2579 1.1 christos }
2580 1.1 christos
2581 1.1 christos if (off >= (bfd_vma) -2)
2582 1.1 christos abort ();
2583 1.1 christos
2584 1.1 christos relocation = base_got->output_offset + off;
2585 1.1 christos
2586 1.1 christos /* For @GOTENT the relocation is against the offset between
2587 1.1 christos the instruction and the symbols entry in the GOT and not
2588 1.1 christos between the start of the GOT and the symbols entry. We
2589 1.1 christos add the vma of the GOT to get the correct value. */
2590 1.1 christos if ( r_type == R_390_GOTENT
2591 1.1 christos || r_type == R_390_GOTPLTENT)
2592 1.1 christos relocation += base_got->output_section->vma;
2593 1.1 christos
2594 1.1 christos break;
2595 1.1 christos
2596 1.1 christos case R_390_GOTOFF16:
2597 1.1 christos case R_390_GOTOFF32:
2598 1.1 christos case R_390_GOTOFF64:
2599 1.1 christos /* Relocation is relative to the start of the global offset
2600 1.1 christos table. */
2601 1.1 christos
2602 1.1 christos /* Note that sgot->output_offset is not involved in this
2603 1.1 christos calculation. We always want the start of .got. If we
2604 1.1 christos defined _GLOBAL_OFFSET_TABLE in a different way, as is
2605 1.1 christos permitted by the ABI, we might have to change this
2606 1.1 christos calculation. */
2607 1.1 christos relocation -= htab->elf.sgot->output_section->vma;
2608 1.1 christos break;
2609 1.1 christos
2610 1.1 christos case R_390_GOTPC:
2611 1.1 christos case R_390_GOTPCDBL:
2612 1.1 christos /* Use global offset table as symbol value. */
2613 1.1 christos relocation = htab->elf.sgot->output_section->vma;
2614 1.1 christos unresolved_reloc = FALSE;
2615 1.1 christos break;
2616 1.1 christos
2617 1.1 christos case R_390_PLT12DBL:
2618 1.1 christos case R_390_PLT16DBL:
2619 1.1 christos case R_390_PLT24DBL:
2620 1.1 christos case R_390_PLT32:
2621 1.1 christos case R_390_PLT32DBL:
2622 1.1 christos case R_390_PLT64:
2623 1.1 christos /* Relocation is to the entry for this symbol in the
2624 1.1 christos procedure linkage table. */
2625 1.1 christos
2626 1.1 christos /* Resolve a PLT32 reloc against a local symbol directly,
2627 1.1 christos without using the procedure linkage table. */
2628 1.1 christos if (h == NULL)
2629 1.1 christos break;
2630 1.1 christos
2631 1.1 christos if (h->plt.offset == (bfd_vma) -1
2632 1.1 christos || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2633 1.1 christos {
2634 1.1 christos /* We didn't make a PLT entry for this symbol. This
2635 1.1 christos happens when statically linking PIC code, or when
2636 1.1 christos using -Bsymbolic. */
2637 1.1 christos break;
2638 1.1 christos }
2639 1.1 christos if (s390_is_ifunc_symbol_p (h))
2640 1.1 christos relocation = (htab->elf.iplt->output_section->vma
2641 1.1 christos + htab->elf.iplt->output_offset
2642 1.1 christos + h->plt.offset);
2643 1.1 christos else
2644 1.1 christos relocation = (htab->elf.splt->output_section->vma
2645 1.1 christos + htab->elf.splt->output_offset
2646 1.1 christos + h->plt.offset);
2647 1.1 christos unresolved_reloc = FALSE;
2648 1.1 christos break;
2649 1.1 christos
2650 1.1 christos case R_390_PLTOFF16:
2651 1.1 christos case R_390_PLTOFF32:
2652 1.1 christos case R_390_PLTOFF64:
2653 1.1 christos /* Relocation is to the entry for this symbol in the
2654 1.1 christos procedure linkage table relative to the start of the GOT. */
2655 1.1 christos
2656 1.1 christos /* For local symbols or if we didn't make a PLT entry for
2657 1.1 christos this symbol resolve the symbol directly. */
2658 1.1 christos if (h == NULL
2659 1.1 christos || h->plt.offset == (bfd_vma) -1
2660 1.1 christos || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2661 1.1 christos {
2662 1.1 christos relocation -= htab->elf.sgot->output_section->vma;
2663 1.1 christos break;
2664 1.1 christos }
2665 1.1 christos
2666 1.1 christos if (s390_is_ifunc_symbol_p (h))
2667 1.1 christos relocation = (htab->elf.iplt->output_section->vma
2668 1.1 christos + htab->elf.iplt->output_offset
2669 1.1 christos + h->plt.offset
2670 1.1 christos - htab->elf.sgot->output_section->vma);
2671 1.1 christos else
2672 1.1 christos relocation = (htab->elf.splt->output_section->vma
2673 1.1 christos + htab->elf.splt->output_offset
2674 1.1 christos + h->plt.offset
2675 1.1 christos - htab->elf.sgot->output_section->vma);
2676 1.1 christos unresolved_reloc = FALSE;
2677 1.1 christos break;
2678 1.1 christos
2679 1.1 christos case R_390_8:
2680 1.1 christos case R_390_16:
2681 1.1 christos case R_390_32:
2682 1.1 christos case R_390_64:
2683 1.1 christos case R_390_PC16:
2684 1.1 christos case R_390_PC12DBL:
2685 1.1 christos case R_390_PC16DBL:
2686 1.1 christos case R_390_PC24DBL:
2687 1.1 christos case R_390_PC32:
2688 1.1 christos case R_390_PC32DBL:
2689 1.1 christos case R_390_PC64:
2690 1.1 christos
2691 1.1 christos if (h != NULL
2692 1.1 christos && s390_is_ifunc_symbol_p (h)
2693 1.1 christos && h->def_regular)
2694 1.1 christos {
2695 1.1 christos if (!info->shared || !h->non_got_ref)
2696 1.1 christos {
2697 1.1 christos /* For a non-shared object STT_GNU_IFUNC symbol must
2698 1.1 christos go through PLT. */
2699 1.1 christos relocation = (htab->elf.iplt->output_section->vma
2700 1.1 christos + htab->elf.iplt->output_offset
2701 1.1 christos + h ->plt.offset);
2702 1.1 christos goto do_relocation;
2703 1.1 christos }
2704 1.1 christos else
2705 1.1 christos {
2706 1.1 christos /* For shared objects a runtime relocation is needed. */
2707 1.1 christos
2708 1.1 christos Elf_Internal_Rela outrel;
2709 1.1 christos asection *sreloc;
2710 1.1 christos
2711 1.1 christos /* Need a dynamic relocation to get the real function
2712 1.1 christos address. */
2713 1.1 christos outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2714 1.1 christos info,
2715 1.1 christos input_section,
2716 1.1 christos rel->r_offset);
2717 1.1 christos if (outrel.r_offset == (bfd_vma) -1
2718 1.1 christos || outrel.r_offset == (bfd_vma) -2)
2719 1.1 christos abort ();
2720 1.1 christos
2721 1.1 christos outrel.r_offset += (input_section->output_section->vma
2722 1.1 christos + input_section->output_offset);
2723 1.1 christos
2724 1.1 christos if (h->dynindx == -1
2725 1.1 christos || h->forced_local
2726 1.1 christos || info->executable)
2727 1.1 christos {
2728 1.1 christos /* This symbol is resolved locally. */
2729 1.1 christos outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2730 1.1 christos outrel.r_addend = (h->root.u.def.value
2731 1.1 christos + h->root.u.def.section->output_section->vma
2732 1.1 christos + h->root.u.def.section->output_offset);
2733 1.1 christos }
2734 1.1 christos else
2735 1.1 christos {
2736 1.1 christos outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2737 1.1 christos outrel.r_addend = 0;
2738 1.1 christos }
2739 1.1 christos
2740 1.1 christos sreloc = htab->elf.irelifunc;
2741 1.1 christos elf_append_rela (output_bfd, sreloc, &outrel);
2742 1.1 christos
2743 1.1 christos /* If this reloc is against an external symbol, we
2744 1.1 christos do not want to fiddle with the addend. Otherwise,
2745 1.1 christos we need to include the symbol value so that it
2746 1.1 christos becomes an addend for the dynamic reloc. For an
2747 1.1 christos internal symbol, we have updated addend. */
2748 1.1 christos continue;
2749 1.1 christos }
2750 1.1 christos }
2751 1.1 christos
2752 1.1 christos if ((input_section->flags & SEC_ALLOC) == 0)
2753 1.1 christos break;
2754 1.1 christos
2755 1.1 christos if ((info->shared
2756 1.1 christos && (h == NULL
2757 1.1 christos || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2758 1.1 christos || h->root.type != bfd_link_hash_undefweak)
2759 1.1 christos && ((r_type != R_390_PC16
2760 1.1 christos && r_type != R_390_PC12DBL
2761 1.1 christos && r_type != R_390_PC16DBL
2762 1.1 christos && r_type != R_390_PC24DBL
2763 1.1 christos && r_type != R_390_PC32
2764 1.1 christos && r_type != R_390_PC32DBL
2765 1.1 christos && r_type != R_390_PC64)
2766 1.1 christos || !SYMBOL_CALLS_LOCAL (info, h)))
2767 1.1 christos || (ELIMINATE_COPY_RELOCS
2768 1.1 christos && !info->shared
2769 1.1 christos && h != NULL
2770 1.1 christos && h->dynindx != -1
2771 1.1 christos && !h->non_got_ref
2772 1.1 christos && ((h->def_dynamic
2773 1.1 christos && !h->def_regular)
2774 1.1 christos || h->root.type == bfd_link_hash_undefweak
2775 1.1 christos || h->root.type == bfd_link_hash_undefined)))
2776 1.1 christos {
2777 1.1 christos Elf_Internal_Rela outrel;
2778 1.1 christos bfd_boolean skip, relocate;
2779 1.1 christos asection *sreloc;
2780 1.1 christos bfd_byte *loc;
2781 1.1 christos
2782 1.1 christos /* When generating a shared object, these relocations
2783 1.1 christos are copied into the output file to be resolved at run
2784 1.1 christos time. */
2785 1.1 christos skip = FALSE;
2786 1.1 christos relocate = FALSE;
2787 1.1 christos
2788 1.1 christos outrel.r_offset =
2789 1.1 christos _bfd_elf_section_offset (output_bfd, info, input_section,
2790 1.1 christos rel->r_offset);
2791 1.1 christos if (outrel.r_offset == (bfd_vma) -1)
2792 1.1 christos skip = TRUE;
2793 1.1 christos else if (outrel.r_offset == (bfd_vma) -2)
2794 1.1 christos skip = TRUE, relocate = TRUE;
2795 1.1 christos
2796 1.1 christos outrel.r_offset += (input_section->output_section->vma
2797 1.1 christos + input_section->output_offset);
2798 1.1 christos
2799 1.1 christos if (skip)
2800 1.1 christos memset (&outrel, 0, sizeof outrel);
2801 1.1 christos else if (h != NULL
2802 1.1 christos && h->dynindx != -1
2803 1.1 christos && (r_type == R_390_PC16
2804 1.1 christos || r_type == R_390_PC12DBL
2805 1.1 christos || r_type == R_390_PC16DBL
2806 1.1 christos || r_type == R_390_PC24DBL
2807 1.1 christos || r_type == R_390_PC32
2808 1.1 christos || r_type == R_390_PC32DBL
2809 1.1 christos || r_type == R_390_PC64
2810 1.1 christos || !info->shared
2811 1.1 christos || !SYMBOLIC_BIND (info, h)
2812 1.1 christos || !h->def_regular))
2813 1.1 christos {
2814 1.1 christos outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2815 1.1 christos outrel.r_addend = rel->r_addend;
2816 1.1 christos }
2817 1.1 christos else
2818 1.1 christos {
2819 1.1 christos /* This symbol is local, or marked to become local. */
2820 1.1 christos outrel.r_addend = relocation + rel->r_addend;
2821 1.1 christos if (r_type == R_390_64)
2822 1.1 christos {
2823 1.1 christos relocate = TRUE;
2824 1.1 christos outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2825 1.1 christos }
2826 1.1 christos else
2827 1.1 christos {
2828 1.1 christos long sindx;
2829 1.1 christos
2830 1.1 christos if (bfd_is_abs_section (sec))
2831 1.1 christos sindx = 0;
2832 1.1 christos else if (sec == NULL || sec->owner == NULL)
2833 1.1 christos {
2834 1.1 christos bfd_set_error(bfd_error_bad_value);
2835 1.1 christos return FALSE;
2836 1.1 christos }
2837 1.1 christos else
2838 1.1 christos {
2839 1.1 christos asection *osec;
2840 1.1 christos
2841 1.1 christos osec = sec->output_section;
2842 1.1 christos sindx = elf_section_data (osec)->dynindx;
2843 1.1 christos
2844 1.1 christos if (sindx == 0)
2845 1.1 christos {
2846 1.1 christos osec = htab->elf.text_index_section;
2847 1.1 christos sindx = elf_section_data (osec)->dynindx;
2848 1.1 christos }
2849 1.1 christos BFD_ASSERT (sindx != 0);
2850 1.1 christos
2851 1.1 christos /* We are turning this relocation into one
2852 1.1 christos against a section symbol, so subtract out
2853 1.1 christos the output section's address but not the
2854 1.1 christos offset of the input section in the output
2855 1.1 christos section. */
2856 1.1 christos outrel.r_addend -= osec->vma;
2857 1.1 christos }
2858 1.1 christos outrel.r_info = ELF64_R_INFO (sindx, r_type);
2859 1.1 christos }
2860 1.1 christos }
2861 1.1 christos
2862 1.1 christos sreloc = elf_section_data (input_section)->sreloc;
2863 1.1 christos if (sreloc == NULL)
2864 1.1 christos abort ();
2865 1.1 christos
2866 1.1 christos loc = sreloc->contents;
2867 1.1 christos loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2868 1.1 christos bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2869 1.1 christos
2870 1.1 christos /* If this reloc is against an external symbol, we do
2871 1.1 christos not want to fiddle with the addend. Otherwise, we
2872 1.1 christos need to include the symbol value so that it becomes
2873 1.1 christos an addend for the dynamic reloc. */
2874 1.1 christos if (! relocate)
2875 1.1 christos continue;
2876 1.1 christos }
2877 1.1 christos
2878 1.1 christos break;
2879 1.1 christos
2880 1.1 christos /* Relocations for tls literal pool entries. */
2881 1.1 christos case R_390_TLS_IE64:
2882 1.1 christos if (info->shared)
2883 1.1 christos {
2884 1.1 christos Elf_Internal_Rela outrel;
2885 1.1 christos asection *sreloc;
2886 1.1 christos bfd_byte *loc;
2887 1.1 christos
2888 1.1 christos outrel.r_offset = rel->r_offset
2889 1.1 christos + input_section->output_section->vma
2890 1.1 christos + input_section->output_offset;
2891 1.1 christos outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2892 1.1 christos sreloc = elf_section_data (input_section)->sreloc;
2893 1.1 christos if (sreloc == NULL)
2894 1.1 christos abort ();
2895 1.1 christos loc = sreloc->contents;
2896 1.1 christos loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2897 1.1 christos bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2898 1.1 christos }
2899 1.1 christos /* Fall through. */
2900 1.1 christos
2901 1.1 christos case R_390_TLS_GD64:
2902 1.1 christos case R_390_TLS_GOTIE64:
2903 1.1 christos r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2904 1.1 christos tls_type = GOT_UNKNOWN;
2905 1.1 christos if (h == NULL && local_got_offsets)
2906 1.1 christos tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2907 1.1 christos else if (h != NULL)
2908 1.1 christos {
2909 1.1 christos tls_type = elf_s390_hash_entry(h)->tls_type;
2910 1.1 christos if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2911 1.1 christos r_type = R_390_TLS_LE64;
2912 1.1 christos }
2913 1.1 christos if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2914 1.1 christos r_type = R_390_TLS_IE64;
2915 1.1 christos
2916 1.1 christos if (r_type == R_390_TLS_LE64)
2917 1.1 christos {
2918 1.1 christos /* This relocation gets optimized away by the local exec
2919 1.1 christos access optimization. */
2920 1.1 christos BFD_ASSERT (! unresolved_reloc);
2921 1.1 christos bfd_put_64 (output_bfd, -tpoff (info, relocation),
2922 1.1 christos contents + rel->r_offset);
2923 1.1 christos continue;
2924 1.1 christos }
2925 1.1 christos
2926 1.1 christos if (htab->elf.sgot == NULL)
2927 1.1 christos abort ();
2928 1.1 christos
2929 1.1 christos if (h != NULL)
2930 1.1 christos off = h->got.offset;
2931 1.1 christos else
2932 1.1 christos {
2933 1.1 christos if (local_got_offsets == NULL)
2934 1.1 christos abort ();
2935 1.1 christos
2936 1.1 christos off = local_got_offsets[r_symndx];
2937 1.1 christos }
2938 1.1 christos
2939 1.1 christos emit_tls_relocs:
2940 1.1 christos
2941 1.1 christos if ((off & 1) != 0)
2942 1.1 christos off &= ~1;
2943 1.1 christos else
2944 1.1 christos {
2945 1.1 christos Elf_Internal_Rela outrel;
2946 1.1 christos bfd_byte *loc;
2947 1.1 christos int dr_type, indx;
2948 1.1 christos
2949 1.1 christos if (htab->elf.srelgot == NULL)
2950 1.1 christos abort ();
2951 1.1 christos
2952 1.1 christos outrel.r_offset = (htab->elf.sgot->output_section->vma
2953 1.1 christos + htab->elf.sgot->output_offset + off);
2954 1.1 christos
2955 1.1 christos indx = h && h->dynindx != -1 ? h->dynindx : 0;
2956 1.1 christos if (r_type == R_390_TLS_GD64)
2957 1.1 christos dr_type = R_390_TLS_DTPMOD;
2958 1.1 christos else
2959 1.1 christos dr_type = R_390_TLS_TPOFF;
2960 1.1 christos if (dr_type == R_390_TLS_TPOFF && indx == 0)
2961 1.1 christos outrel.r_addend = relocation - dtpoff_base (info);
2962 1.1 christos else
2963 1.1 christos outrel.r_addend = 0;
2964 1.1 christos outrel.r_info = ELF64_R_INFO (indx, dr_type);
2965 1.1 christos loc = htab->elf.srelgot->contents;
2966 1.1 christos loc += htab->elf.srelgot->reloc_count++
2967 1.1 christos * sizeof (Elf64_External_Rela);
2968 1.1 christos bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2969 1.1 christos
2970 1.1 christos if (r_type == R_390_TLS_GD64)
2971 1.1 christos {
2972 1.1 christos if (indx == 0)
2973 1.1 christos {
2974 1.1 christos BFD_ASSERT (! unresolved_reloc);
2975 1.1 christos bfd_put_64 (output_bfd,
2976 1.1 christos relocation - dtpoff_base (info),
2977 1.1 christos htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2978 1.1 christos }
2979 1.1 christos else
2980 1.1 christos {
2981 1.1 christos outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2982 1.1 christos outrel.r_offset += GOT_ENTRY_SIZE;
2983 1.1 christos outrel.r_addend = 0;
2984 1.1 christos htab->elf.srelgot->reloc_count++;
2985 1.1 christos loc += sizeof (Elf64_External_Rela);
2986 1.1 christos bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2987 1.1 christos }
2988 1.1 christos }
2989 1.1 christos
2990 1.1 christos if (h != NULL)
2991 1.1 christos h->got.offset |= 1;
2992 1.1 christos else
2993 1.1 christos local_got_offsets[r_symndx] |= 1;
2994 1.1 christos }
2995 1.1 christos
2996 1.1 christos if (off >= (bfd_vma) -2)
2997 1.1 christos abort ();
2998 1.1 christos if (r_type == ELF64_R_TYPE (rel->r_info))
2999 1.1 christos {
3000 1.1 christos relocation = htab->elf.sgot->output_offset + off;
3001 1.1 christos if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
3002 1.1 christos relocation += htab->elf.sgot->output_section->vma;
3003 1.1 christos unresolved_reloc = FALSE;
3004 1.1 christos }
3005 1.1 christos else
3006 1.1 christos {
3007 1.1 christos bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
3008 1.1 christos contents + rel->r_offset);
3009 1.1 christos continue;
3010 1.1 christos }
3011 1.1 christos break;
3012 1.1 christos
3013 1.1 christos case R_390_TLS_GOTIE12:
3014 1.1 christos case R_390_TLS_GOTIE20:
3015 1.1 christos case R_390_TLS_IEENT:
3016 1.1 christos if (h == NULL)
3017 1.1 christos {
3018 1.1 christos if (local_got_offsets == NULL)
3019 1.1 christos abort();
3020 1.1 christos off = local_got_offsets[r_symndx];
3021 1.1 christos if (info->shared)
3022 1.1 christos goto emit_tls_relocs;
3023 1.1 christos }
3024 1.1 christos else
3025 1.1 christos {
3026 1.1 christos off = h->got.offset;
3027 1.1 christos tls_type = elf_s390_hash_entry(h)->tls_type;
3028 1.1 christos if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
3029 1.1 christos goto emit_tls_relocs;
3030 1.1 christos }
3031 1.1 christos
3032 1.1 christos if (htab->elf.sgot == NULL)
3033 1.1 christos abort ();
3034 1.1 christos
3035 1.1 christos BFD_ASSERT (! unresolved_reloc);
3036 1.1 christos bfd_put_64 (output_bfd, -tpoff (info, relocation),
3037 1.1 christos htab->elf.sgot->contents + off);
3038 1.1 christos relocation = htab->elf.sgot->output_offset + off;
3039 1.1 christos if (r_type == R_390_TLS_IEENT)
3040 1.1 christos relocation += htab->elf.sgot->output_section->vma;
3041 1.1 christos unresolved_reloc = FALSE;
3042 1.1 christos break;
3043 1.1 christos
3044 1.1 christos case R_390_TLS_LDM64:
3045 1.1 christos if (! info->shared)
3046 1.1 christos /* The literal pool entry this relocation refers to gets ignored
3047 1.1 christos by the optimized code of the local exec model. Do nothing
3048 1.1 christos and the value will turn out zero. */
3049 1.1 christos continue;
3050 1.1 christos
3051 1.1 christos if (htab->elf.sgot == NULL)
3052 1.1 christos abort ();
3053 1.1 christos
3054 1.1 christos off = htab->tls_ldm_got.offset;
3055 1.1 christos if (off & 1)
3056 1.1 christos off &= ~1;
3057 1.1 christos else
3058 1.1 christos {
3059 1.1 christos Elf_Internal_Rela outrel;
3060 1.1 christos bfd_byte *loc;
3061 1.1 christos
3062 1.1 christos if (htab->elf.srelgot == NULL)
3063 1.1 christos abort ();
3064 1.1 christos
3065 1.1 christos outrel.r_offset = (htab->elf.sgot->output_section->vma
3066 1.1 christos + htab->elf.sgot->output_offset + off);
3067 1.1 christos
3068 1.1 christos bfd_put_64 (output_bfd, 0,
3069 1.1 christos htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3070 1.1 christos outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
3071 1.1 christos outrel.r_addend = 0;
3072 1.1 christos loc = htab->elf.srelgot->contents;
3073 1.1 christos loc += htab->elf.srelgot->reloc_count++
3074 1.1 christos * sizeof (Elf64_External_Rela);
3075 1.1 christos bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3076 1.1 christos htab->tls_ldm_got.offset |= 1;
3077 1.1 christos }
3078 1.1 christos relocation = htab->elf.sgot->output_offset + off;
3079 1.1 christos unresolved_reloc = FALSE;
3080 1.1 christos break;
3081 1.1 christos
3082 1.1 christos case R_390_TLS_LE64:
3083 1.1.1.2 christos if (info->shared && !info->pie)
3084 1.1 christos {
3085 1.1 christos /* Linking a shared library with non-fpic code requires
3086 1.1 christos a R_390_TLS_TPOFF relocation. */
3087 1.1 christos Elf_Internal_Rela outrel;
3088 1.1 christos asection *sreloc;
3089 1.1 christos bfd_byte *loc;
3090 1.1 christos int indx;
3091 1.1 christos
3092 1.1 christos outrel.r_offset = rel->r_offset
3093 1.1 christos + input_section->output_section->vma
3094 1.1 christos + input_section->output_offset;
3095 1.1 christos if (h != NULL && h->dynindx != -1)
3096 1.1 christos indx = h->dynindx;
3097 1.1 christos else
3098 1.1 christos indx = 0;
3099 1.1 christos outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3100 1.1 christos if (indx == 0)
3101 1.1 christos outrel.r_addend = relocation - dtpoff_base (info);
3102 1.1 christos else
3103 1.1 christos outrel.r_addend = 0;
3104 1.1 christos sreloc = elf_section_data (input_section)->sreloc;
3105 1.1 christos if (sreloc == NULL)
3106 1.1 christos abort ();
3107 1.1 christos loc = sreloc->contents;
3108 1.1 christos loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3109 1.1 christos bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3110 1.1 christos }
3111 1.1 christos else
3112 1.1 christos {
3113 1.1 christos BFD_ASSERT (! unresolved_reloc);
3114 1.1 christos bfd_put_64 (output_bfd, -tpoff (info, relocation),
3115 1.1 christos contents + rel->r_offset);
3116 1.1 christos }
3117 1.1 christos continue;
3118 1.1 christos
3119 1.1 christos case R_390_TLS_LDO64:
3120 1.1 christos if (info->shared || (input_section->flags & SEC_DEBUGGING))
3121 1.1 christos relocation -= dtpoff_base (info);
3122 1.1 christos else
3123 1.1 christos /* When converting LDO to LE, we must negate. */
3124 1.1 christos relocation = -tpoff (info, relocation);
3125 1.1 christos break;
3126 1.1 christos
3127 1.1 christos /* Relocations for tls instructions. */
3128 1.1 christos case R_390_TLS_LOAD:
3129 1.1 christos case R_390_TLS_GDCALL:
3130 1.1 christos case R_390_TLS_LDCALL:
3131 1.1 christos tls_type = GOT_UNKNOWN;
3132 1.1 christos if (h == NULL && local_got_offsets)
3133 1.1 christos tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3134 1.1 christos else if (h != NULL)
3135 1.1 christos tls_type = elf_s390_hash_entry(h)->tls_type;
3136 1.1 christos
3137 1.1 christos if (tls_type == GOT_TLS_GD)
3138 1.1 christos continue;
3139 1.1 christos
3140 1.1 christos if (r_type == R_390_TLS_LOAD)
3141 1.1 christos {
3142 1.1 christos if (!info->shared && (h == NULL || h->dynindx == -1))
3143 1.1 christos {
3144 1.1 christos /* IE->LE transition. Four valid cases:
3145 1.1 christos lg %rx,(0,%ry) -> sllg %rx,%ry,0
3146 1.1 christos lg %rx,(%ry,0) -> sllg %rx,%ry,0
3147 1.1 christos lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3148 1.1 christos lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3149 1.1 christos unsigned int insn0, insn1, ry;
3150 1.1 christos
3151 1.1 christos insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3152 1.1 christos insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3153 1.1 christos if (insn1 != 0x0004)
3154 1.1 christos invalid_tls_insn (input_bfd, input_section, rel);
3155 1.1 christos ry = 0;
3156 1.1 christos if ((insn0 & 0xff00f000) == 0xe3000000)
3157 1.1 christos /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3158 1.1 christos ry = (insn0 & 0x000f0000);
3159 1.1 christos else if ((insn0 & 0xff0f0000) == 0xe3000000)
3160 1.1 christos /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3161 1.1 christos ry = (insn0 & 0x0000f000) << 4;
3162 1.1 christos else if ((insn0 & 0xff00f000) == 0xe300c000)
3163 1.1 christos /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3164 1.1 christos ry = (insn0 & 0x000f0000);
3165 1.1 christos else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3166 1.1 christos /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3167 1.1 christos ry = (insn0 & 0x0000f000) << 4;
3168 1.1 christos else
3169 1.1 christos invalid_tls_insn (input_bfd, input_section, rel);
3170 1.1 christos insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3171 1.1 christos insn1 = 0x000d;
3172 1.1 christos bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3173 1.1 christos bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3174 1.1 christos }
3175 1.1 christos }
3176 1.1 christos else if (r_type == R_390_TLS_GDCALL)
3177 1.1 christos {
3178 1.1 christos unsigned int insn0, insn1;
3179 1.1 christos
3180 1.1 christos insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3181 1.1 christos insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3182 1.1 christos if ((insn0 & 0xffff0000) != 0xc0e50000)
3183 1.1 christos invalid_tls_insn (input_bfd, input_section, rel);
3184 1.1 christos if (!info->shared && (h == NULL || h->dynindx == -1))
3185 1.1 christos {
3186 1.1 christos /* GD->LE transition.
3187 1.1 christos brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3188 1.1 christos insn0 = 0xc0040000;
3189 1.1 christos insn1 = 0x0000;
3190 1.1 christos }
3191 1.1 christos else
3192 1.1 christos {
3193 1.1 christos /* GD->IE transition.
3194 1.1 christos brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3195 1.1 christos insn0 = 0xe322c000;
3196 1.1 christos insn1 = 0x0004;
3197 1.1 christos }
3198 1.1 christos bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3199 1.1 christos bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3200 1.1 christos }
3201 1.1 christos else if (r_type == R_390_TLS_LDCALL)
3202 1.1 christos {
3203 1.1 christos if (!info->shared)
3204 1.1 christos {
3205 1.1 christos unsigned int insn0, insn1;
3206 1.1 christos
3207 1.1 christos insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3208 1.1 christos insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3209 1.1 christos if ((insn0 & 0xffff0000) != 0xc0e50000)
3210 1.1 christos invalid_tls_insn (input_bfd, input_section, rel);
3211 1.1 christos /* LD->LE transition.
3212 1.1 christos brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3213 1.1 christos insn0 = 0xc0040000;
3214 1.1 christos insn1 = 0x0000;
3215 1.1 christos bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3216 1.1 christos bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3217 1.1 christos }
3218 1.1 christos }
3219 1.1 christos continue;
3220 1.1 christos
3221 1.1 christos default:
3222 1.1 christos break;
3223 1.1 christos }
3224 1.1 christos
3225 1.1 christos /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3226 1.1 christos because such sections are not SEC_ALLOC and thus ld.so will
3227 1.1 christos not process them. */
3228 1.1 christos if (unresolved_reloc
3229 1.1 christos && !((input_section->flags & SEC_DEBUGGING) != 0
3230 1.1 christos && h->def_dynamic)
3231 1.1 christos && _bfd_elf_section_offset (output_bfd, info, input_section,
3232 1.1 christos rel->r_offset) != (bfd_vma) -1)
3233 1.1 christos (*_bfd_error_handler)
3234 1.1 christos (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3235 1.1 christos input_bfd,
3236 1.1 christos input_section,
3237 1.1 christos (long) rel->r_offset,
3238 1.1 christos howto->name,
3239 1.1 christos h->root.root.string);
3240 1.1 christos
3241 1.1 christos do_relocation:
3242 1.1 christos
3243 1.1 christos /* When applying a 24 bit reloc we need to start one byte
3244 1.1 christos earlier. Otherwise the 32 bit get/put bfd operations might
3245 1.1 christos access a byte after the actual section. */
3246 1.1 christos if (r_type == R_390_PC24DBL
3247 1.1 christos || r_type == R_390_PLT24DBL)
3248 1.1 christos rel->r_offset--;
3249 1.1 christos
3250 1.1 christos if (r_type == R_390_20
3251 1.1 christos || r_type == R_390_GOT20
3252 1.1 christos || r_type == R_390_GOTPLT20
3253 1.1 christos || r_type == R_390_TLS_GOTIE20)
3254 1.1 christos {
3255 1.1 christos relocation += rel->r_addend;
3256 1.1 christos relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3257 1.1 christos r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3258 1.1 christos contents, rel->r_offset,
3259 1.1 christos relocation, 0);
3260 1.1 christos }
3261 1.1 christos else
3262 1.1 christos r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3263 1.1 christos contents, rel->r_offset,
3264 1.1 christos relocation, rel->r_addend);
3265 1.1 christos
3266 1.1 christos if (r != bfd_reloc_ok)
3267 1.1 christos {
3268 1.1 christos const char *name;
3269 1.1 christos
3270 1.1 christos if (h != NULL)
3271 1.1 christos name = h->root.root.string;
3272 1.1 christos else
3273 1.1 christos {
3274 1.1 christos name = bfd_elf_string_from_elf_section (input_bfd,
3275 1.1 christos symtab_hdr->sh_link,
3276 1.1 christos sym->st_name);
3277 1.1 christos if (name == NULL)
3278 1.1 christos return FALSE;
3279 1.1 christos if (*name == '\0')
3280 1.1 christos name = bfd_section_name (input_bfd, sec);
3281 1.1 christos }
3282 1.1 christos
3283 1.1 christos if (r == bfd_reloc_overflow)
3284 1.1 christos {
3285 1.1 christos
3286 1.1 christos if (! ((*info->callbacks->reloc_overflow)
3287 1.1 christos (info, (h ? &h->root : NULL), name, howto->name,
3288 1.1 christos (bfd_vma) 0, input_bfd, input_section,
3289 1.1 christos rel->r_offset)))
3290 1.1 christos return FALSE;
3291 1.1 christos }
3292 1.1 christos else
3293 1.1 christos {
3294 1.1 christos (*_bfd_error_handler)
3295 1.1 christos (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3296 1.1 christos input_bfd, input_section,
3297 1.1 christos (long) rel->r_offset, name, (int) r);
3298 1.1 christos return FALSE;
3299 1.1 christos }
3300 1.1 christos }
3301 1.1 christos }
3302 1.1 christos
3303 1.1 christos return TRUE;
3304 1.1 christos }
3305 1.1 christos
3306 1.1 christos /* Generate the PLT slots together with the dynamic relocations needed
3307 1.1 christos for IFUNC symbols. */
3308 1.1 christos
3309 1.1 christos static void
3310 1.1 christos elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3311 1.1 christos struct bfd_link_info *info,
3312 1.1 christos struct elf_link_hash_entry *h,
3313 1.1 christos struct elf_s390_link_hash_table *htab,
3314 1.1 christos bfd_vma plt_offset,
3315 1.1 christos bfd_vma resolver_address)
3316 1.1 christos {
3317 1.1 christos bfd_vma plt_index;
3318 1.1 christos bfd_vma got_offset;
3319 1.1 christos Elf_Internal_Rela rela;
3320 1.1 christos bfd_byte *loc;
3321 1.1 christos asection *plt, *gotplt, *relplt;
3322 1.1 christos
3323 1.1 christos if (htab->elf.iplt == NULL
3324 1.1 christos || htab->elf.igotplt == NULL
3325 1.1 christos || htab->elf.irelplt == NULL)
3326 1.1 christos abort ();
3327 1.1 christos
3328 1.1 christos /* Index of the PLT slot within iplt section. */
3329 1.1 christos plt_index = plt_offset / PLT_ENTRY_SIZE;
3330 1.1 christos plt = htab->elf.iplt;
3331 1.1 christos /* Offset into the igot.plt section. */
3332 1.1 christos got_offset = plt_index * GOT_ENTRY_SIZE;
3333 1.1 christos gotplt = htab->elf.igotplt;
3334 1.1 christos relplt = htab->elf.irelplt;
3335 1.1 christos
3336 1.1 christos /* Fill in the blueprint of a PLT. */
3337 1.1 christos memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3338 1.1 christos PLT_ENTRY_SIZE);
3339 1.1 christos
3340 1.1 christos /* Fixup the relative address to the GOT entry */
3341 1.1 christos bfd_put_32 (output_bfd,
3342 1.1 christos (gotplt->output_section->vma +
3343 1.1 christos gotplt->output_offset + got_offset
3344 1.1 christos - (plt->output_section->vma +
3345 1.1 christos plt->output_offset +
3346 1.1 christos plt_offset))/2,
3347 1.1 christos plt->contents + plt_offset + 2);
3348 1.1 christos /* Fixup the relative branch to PLT 0 */
3349 1.1 christos bfd_put_32 (output_bfd, - (plt->output_offset +
3350 1.1 christos (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3351 1.1 christos plt->contents + plt_offset + 24);
3352 1.1 christos /* Fixup offset into .rela.plt section. */
3353 1.1 christos bfd_put_32 (output_bfd, relplt->output_offset +
3354 1.1 christos plt_index * sizeof (Elf64_External_Rela),
3355 1.1 christos plt->contents + plt_offset + 28);
3356 1.1 christos
3357 1.1 christos /* Fill in the entry in the global offset table.
3358 1.1 christos Points to instruction after GOT offset. */
3359 1.1 christos bfd_put_64 (output_bfd,
3360 1.1 christos (plt->output_section->vma
3361 1.1 christos + plt->output_offset
3362 1.1 christos + plt_offset
3363 1.1 christos + 14),
3364 1.1 christos gotplt->contents + got_offset);
3365 1.1 christos
3366 1.1 christos /* Fill in the entry in the .rela.plt section. */
3367 1.1 christos rela.r_offset = (gotplt->output_section->vma
3368 1.1 christos + gotplt->output_offset
3369 1.1 christos + got_offset);
3370 1.1 christos
3371 1.1 christos if (!h
3372 1.1 christos || h->dynindx == -1
3373 1.1 christos || ((info->executable
3374 1.1 christos || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3375 1.1 christos && h->def_regular))
3376 1.1 christos {
3377 1.1 christos /* The symbol can be locally resolved. */
3378 1.1 christos rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3379 1.1 christos rela.r_addend = resolver_address;
3380 1.1 christos }
3381 1.1 christos else
3382 1.1 christos {
3383 1.1 christos rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3384 1.1 christos rela.r_addend = 0;
3385 1.1 christos }
3386 1.1 christos
3387 1.1 christos loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3388 1.1 christos bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3389 1.1 christos }
3390 1.1 christos
3391 1.1 christos
3392 1.1 christos /* Finish up dynamic symbol handling. We set the contents of various
3393 1.1 christos dynamic sections here. */
3394 1.1 christos
3395 1.1 christos static bfd_boolean
3396 1.1 christos elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3397 1.1 christos struct bfd_link_info *info,
3398 1.1 christos struct elf_link_hash_entry *h,
3399 1.1 christos Elf_Internal_Sym *sym)
3400 1.1 christos {
3401 1.1 christos struct elf_s390_link_hash_table *htab;
3402 1.1 christos struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3403 1.1 christos
3404 1.1 christos htab = elf_s390_hash_table (info);
3405 1.1 christos if (htab == NULL)
3406 1.1 christos return FALSE;
3407 1.1 christos
3408 1.1 christos if (h->plt.offset != (bfd_vma) -1)
3409 1.1 christos {
3410 1.1 christos bfd_vma plt_index;
3411 1.1 christos bfd_vma got_offset;
3412 1.1 christos Elf_Internal_Rela rela;
3413 1.1 christos bfd_byte *loc;
3414 1.1 christos
3415 1.1 christos /* This symbol has an entry in the procedure linkage table. Set
3416 1.1 christos it up. */
3417 1.1 christos if (s390_is_ifunc_symbol_p (h))
3418 1.1 christos {
3419 1.1 christos /* If we can resolve the IFUNC symbol locally we generate an
3420 1.1 christos IRELATIVE reloc. */
3421 1.1 christos elf_s390_finish_ifunc_symbol (output_bfd, info, h, htab, h->plt.offset,
3422 1.1 christos eh->ifunc_resolver_address +
3423 1.1 christos eh->ifunc_resolver_section->output_offset +
3424 1.1 christos eh->ifunc_resolver_section->output_section->vma);
3425 1.1 christos ;
3426 1.1 christos /* Fallthrough. Handling of explicit GOT slots of IFUNC
3427 1.1 christos symbols is below. */
3428 1.1 christos }
3429 1.1 christos else
3430 1.1 christos {
3431 1.1 christos if (h->dynindx == -1
3432 1.1 christos || htab->elf.splt == NULL
3433 1.1 christos || htab->elf.sgotplt == NULL
3434 1.1 christos || htab->elf.srelplt == NULL)
3435 1.1 christos abort ();
3436 1.1 christos
3437 1.1 christos /* Calc. index no.
3438 1.1 christos Current offset - size first entry / entry size. */
3439 1.1 christos plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3440 1.1 christos
3441 1.1 christos /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3442 1.1 christos addr & GOT addr. */
3443 1.1 christos got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3444 1.1 christos
3445 1.1 christos /* Fill in the blueprint of a PLT. */
3446 1.1 christos memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3447 1.1 christos PLT_ENTRY_SIZE);
3448 1.1 christos
3449 1.1 christos /* Fixup the relative address to the GOT entry */
3450 1.1 christos bfd_put_32 (output_bfd,
3451 1.1 christos (htab->elf.sgotplt->output_section->vma +
3452 1.1 christos htab->elf.sgotplt->output_offset + got_offset
3453 1.1 christos - (htab->elf.splt->output_section->vma +
3454 1.1 christos htab->elf.splt->output_offset +
3455 1.1 christos h->plt.offset))/2,
3456 1.1 christos htab->elf.splt->contents + h->plt.offset + 2);
3457 1.1 christos /* Fixup the relative branch to PLT 0 */
3458 1.1 christos bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3459 1.1 christos (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3460 1.1 christos htab->elf.splt->contents + h->plt.offset + 24);
3461 1.1 christos /* Fixup offset into .rela.plt section. */
3462 1.1 christos bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3463 1.1 christos htab->elf.splt->contents + h->plt.offset + 28);
3464 1.1 christos
3465 1.1 christos /* Fill in the entry in the global offset table.
3466 1.1 christos Points to instruction after GOT offset. */
3467 1.1 christos bfd_put_64 (output_bfd,
3468 1.1 christos (htab->elf.splt->output_section->vma
3469 1.1 christos + htab->elf.splt->output_offset
3470 1.1 christos + h->plt.offset
3471 1.1 christos + 14),
3472 1.1 christos htab->elf.sgotplt->contents + got_offset);
3473 1.1 christos
3474 1.1 christos /* Fill in the entry in the .rela.plt section. */
3475 1.1 christos rela.r_offset = (htab->elf.sgotplt->output_section->vma
3476 1.1 christos + htab->elf.sgotplt->output_offset
3477 1.1 christos + got_offset);
3478 1.1 christos rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3479 1.1 christos rela.r_addend = 0;
3480 1.1 christos loc = htab->elf.srelplt->contents + plt_index *
3481 1.1 christos sizeof (Elf64_External_Rela);
3482 1.1 christos bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3483 1.1 christos
3484 1.1 christos if (!h->def_regular)
3485 1.1 christos {
3486 1.1 christos /* Mark the symbol as undefined, rather than as defined in
3487 1.1 christos the .plt section. Leave the value alone. This is a clue
3488 1.1 christos for the dynamic linker, to make function pointer
3489 1.1 christos comparisons work between an application and shared
3490 1.1 christos library. */
3491 1.1 christos sym->st_shndx = SHN_UNDEF;
3492 1.1 christos }
3493 1.1 christos }
3494 1.1 christos }
3495 1.1 christos
3496 1.1 christos if (h->got.offset != (bfd_vma) -1
3497 1.1 christos && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3498 1.1 christos && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3499 1.1 christos && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3500 1.1 christos {
3501 1.1 christos Elf_Internal_Rela rela;
3502 1.1 christos bfd_byte *loc;
3503 1.1 christos
3504 1.1 christos /* This symbol has an entry in the global offset table. Set it
3505 1.1 christos up. */
3506 1.1 christos if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3507 1.1 christos abort ();
3508 1.1 christos
3509 1.1 christos rela.r_offset = (htab->elf.sgot->output_section->vma
3510 1.1 christos + htab->elf.sgot->output_offset
3511 1.1 christos + (h->got.offset &~ (bfd_vma) 1));
3512 1.1 christos
3513 1.1 christos if (h->def_regular && s390_is_ifunc_symbol_p (h))
3514 1.1 christos {
3515 1.1 christos if (info->shared)
3516 1.1 christos {
3517 1.1 christos /* An explicit GOT slot usage needs GLOB_DAT. If the
3518 1.1 christos symbol references local the implicit got.iplt slot
3519 1.1 christos will be used and the IRELATIVE reloc has been created
3520 1.1 christos above. */
3521 1.1 christos goto do_glob_dat;
3522 1.1 christos }
3523 1.1 christos else
3524 1.1 christos {
3525 1.1 christos /* For non-shared objects explicit GOT slots must be
3526 1.1 christos filled with the PLT slot address for pointer
3527 1.1 christos equality reasons. */
3528 1.1 christos bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3529 1.1 christos + htab->elf.iplt->output_offset
3530 1.1 christos + h->plt.offset),
3531 1.1 christos htab->elf.sgot->contents + h->got.offset);
3532 1.1 christos return TRUE;
3533 1.1 christos }
3534 1.1 christos }
3535 1.1 christos else if (info->shared
3536 1.1 christos && SYMBOL_REFERENCES_LOCAL (info, h))
3537 1.1 christos {
3538 1.1 christos /* If this is a static link, or it is a -Bsymbolic link and
3539 1.1 christos the symbol is defined locally or was forced to be local
3540 1.1 christos because of a version file, we just want to emit a
3541 1.1 christos RELATIVE reloc. The entry in the global offset table
3542 1.1 christos will already have been initialized in the
3543 1.1 christos relocate_section function. */
3544 1.1 christos if (!h->def_regular)
3545 1.1 christos return FALSE;
3546 1.1 christos BFD_ASSERT((h->got.offset & 1) != 0);
3547 1.1 christos rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3548 1.1 christos rela.r_addend = (h->root.u.def.value
3549 1.1 christos + h->root.u.def.section->output_section->vma
3550 1.1 christos + h->root.u.def.section->output_offset);
3551 1.1 christos }
3552 1.1 christos else
3553 1.1 christos {
3554 1.1 christos BFD_ASSERT((h->got.offset & 1) == 0);
3555 1.1 christos do_glob_dat:
3556 1.1 christos bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3557 1.1 christos rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3558 1.1 christos rela.r_addend = 0;
3559 1.1 christos }
3560 1.1 christos
3561 1.1 christos loc = htab->elf.srelgot->contents;
3562 1.1 christos loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3563 1.1 christos bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3564 1.1 christos }
3565 1.1 christos
3566 1.1 christos if (h->needs_copy)
3567 1.1 christos {
3568 1.1 christos Elf_Internal_Rela rela;
3569 1.1 christos bfd_byte *loc;
3570 1.1 christos
3571 1.1 christos /* This symbols needs a copy reloc. Set it up. */
3572 1.1 christos
3573 1.1 christos if (h->dynindx == -1
3574 1.1 christos || (h->root.type != bfd_link_hash_defined
3575 1.1 christos && h->root.type != bfd_link_hash_defweak)
3576 1.1 christos || htab->srelbss == NULL)
3577 1.1 christos abort ();
3578 1.1 christos
3579 1.1 christos rela.r_offset = (h->root.u.def.value
3580 1.1 christos + h->root.u.def.section->output_section->vma
3581 1.1 christos + h->root.u.def.section->output_offset);
3582 1.1 christos rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3583 1.1 christos rela.r_addend = 0;
3584 1.1 christos loc = htab->srelbss->contents;
3585 1.1 christos loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3586 1.1 christos bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3587 1.1 christos }
3588 1.1 christos
3589 1.1 christos /* Mark some specially defined symbols as absolute. */
3590 1.1 christos if (h == htab->elf.hdynamic
3591 1.1 christos || h == htab->elf.hgot
3592 1.1 christos || h == htab->elf.hplt)
3593 1.1 christos sym->st_shndx = SHN_ABS;
3594 1.1 christos
3595 1.1 christos return TRUE;
3596 1.1 christos }
3597 1.1 christos
3598 1.1 christos /* Used to decide how to sort relocs in an optimal manner for the
3599 1.1 christos dynamic linker, before writing them out. */
3600 1.1 christos
3601 1.1 christos static enum elf_reloc_type_class
3602 1.1 christos elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3603 1.1 christos const asection *rel_sec ATTRIBUTE_UNUSED,
3604 1.1 christos const Elf_Internal_Rela *rela)
3605 1.1 christos {
3606 1.1 christos switch ((int) ELF64_R_TYPE (rela->r_info))
3607 1.1 christos {
3608 1.1 christos case R_390_RELATIVE:
3609 1.1 christos return reloc_class_relative;
3610 1.1 christos case R_390_JMP_SLOT:
3611 1.1 christos return reloc_class_plt;
3612 1.1 christos case R_390_COPY:
3613 1.1 christos return reloc_class_copy;
3614 1.1 christos default:
3615 1.1 christos return reloc_class_normal;
3616 1.1 christos }
3617 1.1 christos }
3618 1.1 christos
3619 1.1 christos /* Finish up the dynamic sections. */
3620 1.1 christos
3621 1.1 christos static bfd_boolean
3622 1.1 christos elf_s390_finish_dynamic_sections (bfd *output_bfd,
3623 1.1 christos struct bfd_link_info *info)
3624 1.1 christos {
3625 1.1 christos struct elf_s390_link_hash_table *htab;
3626 1.1 christos bfd *dynobj;
3627 1.1 christos asection *sdyn;
3628 1.1 christos bfd *ibfd;
3629 1.1 christos unsigned int i;
3630 1.1 christos
3631 1.1 christos htab = elf_s390_hash_table (info);
3632 1.1 christos if (htab == NULL)
3633 1.1 christos return FALSE;
3634 1.1 christos
3635 1.1 christos dynobj = htab->elf.dynobj;
3636 1.1 christos sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3637 1.1 christos
3638 1.1 christos if (htab->elf.dynamic_sections_created)
3639 1.1 christos {
3640 1.1 christos Elf64_External_Dyn *dyncon, *dynconend;
3641 1.1 christos
3642 1.1 christos if (sdyn == NULL || htab->elf.sgot == NULL)
3643 1.1 christos abort ();
3644 1.1 christos
3645 1.1 christos dyncon = (Elf64_External_Dyn *) sdyn->contents;
3646 1.1 christos dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3647 1.1 christos for (; dyncon < dynconend; dyncon++)
3648 1.1 christos {
3649 1.1 christos Elf_Internal_Dyn dyn;
3650 1.1 christos asection *s;
3651 1.1 christos
3652 1.1 christos bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3653 1.1 christos
3654 1.1 christos switch (dyn.d_tag)
3655 1.1 christos {
3656 1.1 christos default:
3657 1.1 christos continue;
3658 1.1 christos
3659 1.1 christos case DT_PLTGOT:
3660 1.1 christos dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
3661 1.1 christos break;
3662 1.1 christos
3663 1.1 christos case DT_JMPREL:
3664 1.1 christos dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
3665 1.1 christos break;
3666 1.1 christos
3667 1.1 christos case DT_PLTRELSZ:
3668 1.1 christos s = htab->elf.srelplt->output_section;
3669 1.1 christos dyn.d_un.d_val = s->size;
3670 1.1 christos break;
3671 1.1 christos
3672 1.1 christos case DT_RELASZ:
3673 1.1 christos /* The procedure linkage table relocs (DT_JMPREL) should
3674 1.1 christos not be included in the overall relocs (DT_RELA).
3675 1.1 christos Therefore, we override the DT_RELASZ entry here to
3676 1.1 christos make it not include the JMPREL relocs. Since the
3677 1.1 christos linker script arranges for .rela.plt to follow all
3678 1.1 christos other relocation sections, we don't have to worry
3679 1.1 christos about changing the DT_RELA entry. */
3680 1.1 christos s = htab->elf.srelplt->output_section;
3681 1.1 christos dyn.d_un.d_val -= s->size;
3682 1.1 christos break;
3683 1.1 christos }
3684 1.1 christos
3685 1.1 christos bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3686 1.1 christos }
3687 1.1 christos
3688 1.1 christos /* Fill in the special first entry in the procedure linkage table. */
3689 1.1 christos if (htab->elf.splt && htab->elf.splt->size > 0)
3690 1.1 christos {
3691 1.1 christos /* fill in blueprint for plt 0 entry */
3692 1.1 christos memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3693 1.1 christos PLT_FIRST_ENTRY_SIZE);
3694 1.1 christos /* Fixup relative address to start of GOT */
3695 1.1 christos bfd_put_32 (output_bfd,
3696 1.1 christos (htab->elf.sgotplt->output_section->vma +
3697 1.1 christos htab->elf.sgotplt->output_offset
3698 1.1 christos - htab->elf.splt->output_section->vma - 6)/2,
3699 1.1 christos htab->elf.splt->contents + 8);
3700 1.1 christos }
3701 1.1 christos if (elf_section_data (htab->elf.splt->output_section) != NULL)
3702 1.1 christos elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3703 1.1 christos = PLT_ENTRY_SIZE;
3704 1.1 christos }
3705 1.1 christos
3706 1.1 christos if (htab->elf.sgotplt)
3707 1.1 christos {
3708 1.1 christos /* Fill in the first three entries in the global offset table. */
3709 1.1 christos if (htab->elf.sgotplt->size > 0)
3710 1.1 christos {
3711 1.1 christos bfd_put_64 (output_bfd,
3712 1.1 christos (sdyn == NULL ? (bfd_vma) 0
3713 1.1 christos : sdyn->output_section->vma + sdyn->output_offset),
3714 1.1 christos htab->elf.sgotplt->contents);
3715 1.1 christos /* One entry for shared object struct ptr. */
3716 1.1 christos bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3717 1.1 christos /* One entry for _dl_runtime_resolve. */
3718 1.1 christos bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 12);
3719 1.1 christos }
3720 1.1 christos
3721 1.1 christos elf_section_data (htab->elf.sgot->output_section)
3722 1.1 christos ->this_hdr.sh_entsize = 8;
3723 1.1 christos }
3724 1.1 christos
3725 1.1 christos /* Finish dynamic symbol for local IFUNC symbols. */
3726 1.1.1.2 christos for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3727 1.1 christos {
3728 1.1 christos struct plt_entry *local_plt;
3729 1.1 christos Elf_Internal_Sym *isym;
3730 1.1 christos Elf_Internal_Shdr *symtab_hdr;
3731 1.1 christos
3732 1.1 christos symtab_hdr = &elf_symtab_hdr (ibfd);
3733 1.1 christos
3734 1.1 christos local_plt = elf_s390_local_plt (ibfd);
3735 1.1 christos if (local_plt != NULL)
3736 1.1 christos for (i = 0; i < symtab_hdr->sh_info; i++)
3737 1.1 christos {
3738 1.1 christos if (local_plt[i].plt.offset != (bfd_vma) -1)
3739 1.1 christos {
3740 1.1 christos asection *sec = local_plt[i].sec;
3741 1.1 christos isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3742 1.1 christos if (isym == NULL)
3743 1.1 christos return FALSE;
3744 1.1 christos
3745 1.1 christos if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3746 1.1 christos elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3747 1.1 christos local_plt[i].plt.offset,
3748 1.1 christos isym->st_value
3749 1.1 christos + sec->output_section->vma
3750 1.1 christos + sec->output_offset);
3751 1.1 christos
3752 1.1 christos }
3753 1.1 christos }
3754 1.1 christos }
3755 1.1 christos
3756 1.1 christos return TRUE;
3757 1.1 christos }
3758 1.1 christos
3759 1.1 christos /* Return address for Ith PLT stub in section PLT, for relocation REL
3760 1.1 christos or (bfd_vma) -1 if it should not be included. */
3761 1.1 christos
3762 1.1 christos static bfd_vma
3763 1.1 christos elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3764 1.1 christos const arelent *rel ATTRIBUTE_UNUSED)
3765 1.1 christos {
3766 1.1 christos return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3767 1.1 christos }
3768 1.1 christos
3769 1.1.1.3 christos /* Merge backend specific data from an object file to the output
3770 1.1.1.3 christos object file when linking. */
3771 1.1.1.3 christos
3772 1.1.1.3 christos static bfd_boolean
3773 1.1.1.3 christos elf64_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3774 1.1.1.3 christos {
3775 1.1.1.3 christos if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
3776 1.1.1.3 christos return TRUE;
3777 1.1.1.3 christos
3778 1.1.1.3 christos if (!elf_s390_merge_obj_attributes (ibfd, obfd))
3779 1.1.1.3 christos return FALSE;
3780 1.1.1.3 christos
3781 1.1.1.3 christos return TRUE;
3782 1.1.1.3 christos }
3783 1.1.1.3 christos
3784 1.1 christos /* Why was the hash table entry size definition changed from
3785 1.1 christos ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3786 1.1 christos this is the only reason for the s390_elf64_size_info structure. */
3787 1.1 christos
3788 1.1 christos const struct elf_size_info s390_elf64_size_info =
3789 1.1 christos {
3790 1.1 christos sizeof (Elf64_External_Ehdr),
3791 1.1 christos sizeof (Elf64_External_Phdr),
3792 1.1 christos sizeof (Elf64_External_Shdr),
3793 1.1 christos sizeof (Elf64_External_Rel),
3794 1.1 christos sizeof (Elf64_External_Rela),
3795 1.1 christos sizeof (Elf64_External_Sym),
3796 1.1 christos sizeof (Elf64_External_Dyn),
3797 1.1 christos sizeof (Elf_External_Note),
3798 1.1 christos 8, /* hash-table entry size. */
3799 1.1 christos 1, /* internal relocations per external relocations. */
3800 1.1 christos 64, /* arch_size. */
3801 1.1 christos 3, /* log_file_align. */
3802 1.1 christos ELFCLASS64, EV_CURRENT,
3803 1.1 christos bfd_elf64_write_out_phdrs,
3804 1.1 christos bfd_elf64_write_shdrs_and_ehdr,
3805 1.1 christos bfd_elf64_checksum_contents,
3806 1.1 christos bfd_elf64_write_relocs,
3807 1.1 christos bfd_elf64_swap_symbol_in,
3808 1.1 christos bfd_elf64_swap_symbol_out,
3809 1.1 christos bfd_elf64_slurp_reloc_table,
3810 1.1 christos bfd_elf64_slurp_symbol_table,
3811 1.1 christos bfd_elf64_swap_dyn_in,
3812 1.1 christos bfd_elf64_swap_dyn_out,
3813 1.1 christos bfd_elf64_swap_reloc_in,
3814 1.1 christos bfd_elf64_swap_reloc_out,
3815 1.1 christos bfd_elf64_swap_reloca_in,
3816 1.1 christos bfd_elf64_swap_reloca_out
3817 1.1 christos };
3818 1.1 christos
3819 1.1.1.2 christos #define TARGET_BIG_SYM s390_elf64_vec
3820 1.1 christos #define TARGET_BIG_NAME "elf64-s390"
3821 1.1 christos #define ELF_ARCH bfd_arch_s390
3822 1.1 christos #define ELF_TARGET_ID S390_ELF_DATA
3823 1.1 christos #define ELF_MACHINE_CODE EM_S390
3824 1.1 christos #define ELF_MACHINE_ALT1 EM_S390_OLD
3825 1.1 christos #define ELF_MAXPAGESIZE 0x1000
3826 1.1 christos
3827 1.1 christos #define elf_backend_size_info s390_elf64_size_info
3828 1.1 christos
3829 1.1 christos #define elf_backend_can_gc_sections 1
3830 1.1 christos #define elf_backend_can_refcount 1
3831 1.1 christos #define elf_backend_want_got_plt 1
3832 1.1 christos #define elf_backend_plt_readonly 1
3833 1.1 christos #define elf_backend_want_plt_sym 0
3834 1.1 christos #define elf_backend_got_header_size 24
3835 1.1 christos #define elf_backend_rela_normal 1
3836 1.1 christos
3837 1.1 christos #define elf_info_to_howto elf_s390_info_to_howto
3838 1.1 christos
3839 1.1 christos #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3840 1.1 christos #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3841 1.1 christos #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3842 1.1.1.3 christos #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3843 1.1.1.3 christos #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
3844 1.1 christos
3845 1.1 christos #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3846 1.1 christos #define elf_backend_check_relocs elf_s390_check_relocs
3847 1.1 christos #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3848 1.1 christos #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3849 1.1 christos #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3850 1.1 christos #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3851 1.1 christos #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3852 1.1 christos #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3853 1.1 christos #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3854 1.1 christos #define elf_backend_relocate_section elf_s390_relocate_section
3855 1.1 christos #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3856 1.1 christos #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3857 1.1 christos #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3858 1.1 christos #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
3859 1.1.1.3 christos #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
3860 1.1 christos
3861 1.1 christos #define bfd_elf64_mkobject elf_s390_mkobject
3862 1.1 christos #define elf_backend_object_p elf_s390_object_p
3863 1.1 christos
3864 1.1 christos /* Enable ELF64 archive functions. */
3865 1.1 christos #define bfd_elf64_archive_functions
3866 1.1 christos extern bfd_boolean bfd_elf64_archive_slurp_armap (bfd *);
3867 1.1 christos extern bfd_boolean bfd_elf64_archive_write_armap (bfd *, unsigned int, struct orl *, unsigned int, int);
3868 1.1 christos
3869 1.1 christos #define bfd_elf64_archive_slurp_extended_name_table _bfd_archive_coff_slurp_extended_name_table
3870 1.1 christos #define bfd_elf64_archive_construct_extended_name_table _bfd_archive_coff_construct_extended_name_table
3871 1.1 christos #define bfd_elf64_archive_truncate_arname _bfd_archive_coff_truncate_arname
3872 1.1 christos #define bfd_elf64_archive_read_ar_hdr _bfd_archive_coff_read_ar_hdr
3873 1.1 christos #define bfd_elf64_archive_write_ar_hdr _bfd_archive_coff_write_ar_hdr
3874 1.1 christos #define bfd_elf64_archive_openr_next_archived_file _bfd_archive_coff_openr_next_archived_file
3875 1.1 christos #define bfd_elf64_archive_get_elt_at_index _bfd_archive_coff_get_elt_at_index
3876 1.1 christos #define bfd_elf64_archive_generic_stat_arch_elt _bfd_archive_coff_generic_stat_arch_elt
3877 1.1 christos #define bfd_elf64_archive_update_armap_timestamp _bfd_archive_coff_update_armap_timestamp
3878 1.1 christos
3879 1.1 christos #include "elf64-target.h"
3880