elf64-s390.c revision 1.8
1 /* IBM S/390-specific support for 64-bit ELF 2 Copyright (C) 2000-2019 Free Software Foundation, Inc. 3 Contributed Martin Schwidefsky (schwidefsky (at) de.ibm.com). 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 20 02110-1301, USA. */ 21 22 #include "sysdep.h" 23 #include "bfd.h" 24 #include "bfdlink.h" 25 #include "libbfd.h" 26 #include "elf-bfd.h" 27 #include "elf/s390.h" 28 #include "elf-s390.h" 29 #include <stdarg.h> 30 31 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value 32 from smaller values. Start with zero, widen, *then* decrement. */ 33 #define MINUS_ONE (((bfd_vma)0) - 1) 34 35 static bfd_reloc_status_type 36 s390_tls_reloc (bfd *, arelent *, asymbol *, void *, 37 asection *, bfd *, char **); 38 static bfd_reloc_status_type 39 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *, 40 asection *, bfd *, char **); 41 42 /* The relocation "howto" table. */ 43 static reloc_howto_type elf_howto_table[] = 44 { 45 HOWTO (R_390_NONE, /* type */ 46 0, /* rightshift */ 47 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */ 48 0, /* bitsize */ 49 FALSE, /* pc_relative */ 50 0, /* bitpos */ 51 complain_overflow_dont, /* complain_on_overflow */ 52 bfd_elf_generic_reloc, /* special_function */ 53 "R_390_NONE", /* name */ 54 FALSE, /* partial_inplace */ 55 0, /* src_mask */ 56 0, /* dst_mask */ 57 FALSE), /* pcrel_offset */ 58 59 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 60 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), 61 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 62 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), 63 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 64 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), 65 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 66 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), 67 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 68 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), 69 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield, 70 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), 71 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 72 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), 73 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 74 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), 75 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 76 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE), 77 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 78 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE), 79 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 80 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE), 81 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, 82 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE), 83 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 84 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE), 85 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, 86 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE), 87 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 88 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), 89 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, 90 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), 91 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, 92 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), 93 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, 94 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), 95 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 96 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), 97 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 98 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), 99 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 100 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE), 101 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 102 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE), 103 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, 104 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE), 105 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 106 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE), 107 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, 108 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE), 109 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 110 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE), 111 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 112 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), 113 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 114 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE), 115 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 116 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), 117 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 118 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), 119 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 120 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), 121 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 122 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE), 123 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 124 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE), 125 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 126 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), 127 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 128 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), 129 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 130 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE), 131 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, 132 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), 133 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, 134 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), 135 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, 136 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), 137 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */ 138 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 139 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE), 140 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 141 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), 142 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */ 143 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 144 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE), 145 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */ 146 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 147 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE), 148 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */ 149 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 150 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE), 151 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 152 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE), 153 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */ 154 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 155 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE), 156 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */ 157 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 158 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE), 159 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 160 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE), 161 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 162 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE), 163 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 164 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE), 165 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 166 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE), 167 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 168 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE), 169 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 170 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE), 171 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 172 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE), 173 HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 174 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE), 175 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, 176 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE), 177 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, 178 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE), 179 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, 180 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE), 181 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, 182 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE), 183 }; 184 185 /* GNU extension to record C++ vtable hierarchy. */ 186 static reloc_howto_type elf64_s390_vtinherit_howto = 187 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); 188 static reloc_howto_type elf64_s390_vtentry_howto = 189 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); 190 191 static reloc_howto_type * 192 elf_s390_reloc_type_lookup (bfd *abfd, 193 bfd_reloc_code_real_type code) 194 { 195 switch (code) 196 { 197 case BFD_RELOC_NONE: 198 return &elf_howto_table[(int) R_390_NONE]; 199 case BFD_RELOC_8: 200 return &elf_howto_table[(int) R_390_8]; 201 case BFD_RELOC_390_12: 202 return &elf_howto_table[(int) R_390_12]; 203 case BFD_RELOC_16: 204 return &elf_howto_table[(int) R_390_16]; 205 case BFD_RELOC_32: 206 return &elf_howto_table[(int) R_390_32]; 207 case BFD_RELOC_CTOR: 208 return &elf_howto_table[(int) R_390_32]; 209 case BFD_RELOC_32_PCREL: 210 return &elf_howto_table[(int) R_390_PC32]; 211 case BFD_RELOC_390_GOT12: 212 return &elf_howto_table[(int) R_390_GOT12]; 213 case BFD_RELOC_32_GOT_PCREL: 214 return &elf_howto_table[(int) R_390_GOT32]; 215 case BFD_RELOC_390_PLT32: 216 return &elf_howto_table[(int) R_390_PLT32]; 217 case BFD_RELOC_390_COPY: 218 return &elf_howto_table[(int) R_390_COPY]; 219 case BFD_RELOC_390_GLOB_DAT: 220 return &elf_howto_table[(int) R_390_GLOB_DAT]; 221 case BFD_RELOC_390_JMP_SLOT: 222 return &elf_howto_table[(int) R_390_JMP_SLOT]; 223 case BFD_RELOC_390_RELATIVE: 224 return &elf_howto_table[(int) R_390_RELATIVE]; 225 case BFD_RELOC_32_GOTOFF: 226 return &elf_howto_table[(int) R_390_GOTOFF32]; 227 case BFD_RELOC_390_GOTPC: 228 return &elf_howto_table[(int) R_390_GOTPC]; 229 case BFD_RELOC_390_GOT16: 230 return &elf_howto_table[(int) R_390_GOT16]; 231 case BFD_RELOC_16_PCREL: 232 return &elf_howto_table[(int) R_390_PC16]; 233 case BFD_RELOC_390_PC12DBL: 234 return &elf_howto_table[(int) R_390_PC12DBL]; 235 case BFD_RELOC_390_PLT12DBL: 236 return &elf_howto_table[(int) R_390_PLT12DBL]; 237 case BFD_RELOC_390_PC16DBL: 238 return &elf_howto_table[(int) R_390_PC16DBL]; 239 case BFD_RELOC_390_PLT16DBL: 240 return &elf_howto_table[(int) R_390_PLT16DBL]; 241 case BFD_RELOC_390_PC24DBL: 242 return &elf_howto_table[(int) R_390_PC24DBL]; 243 case BFD_RELOC_390_PLT24DBL: 244 return &elf_howto_table[(int) R_390_PLT24DBL]; 245 case BFD_RELOC_390_PC32DBL: 246 return &elf_howto_table[(int) R_390_PC32DBL]; 247 case BFD_RELOC_390_PLT32DBL: 248 return &elf_howto_table[(int) R_390_PLT32DBL]; 249 case BFD_RELOC_390_GOTPCDBL: 250 return &elf_howto_table[(int) R_390_GOTPCDBL]; 251 case BFD_RELOC_64: 252 return &elf_howto_table[(int) R_390_64]; 253 case BFD_RELOC_64_PCREL: 254 return &elf_howto_table[(int) R_390_PC64]; 255 case BFD_RELOC_390_GOT64: 256 return &elf_howto_table[(int) R_390_GOT64]; 257 case BFD_RELOC_390_PLT64: 258 return &elf_howto_table[(int) R_390_PLT64]; 259 case BFD_RELOC_390_GOTENT: 260 return &elf_howto_table[(int) R_390_GOTENT]; 261 case BFD_RELOC_16_GOTOFF: 262 return &elf_howto_table[(int) R_390_GOTOFF16]; 263 case BFD_RELOC_390_GOTOFF64: 264 return &elf_howto_table[(int) R_390_GOTOFF64]; 265 case BFD_RELOC_390_GOTPLT12: 266 return &elf_howto_table[(int) R_390_GOTPLT12]; 267 case BFD_RELOC_390_GOTPLT16: 268 return &elf_howto_table[(int) R_390_GOTPLT16]; 269 case BFD_RELOC_390_GOTPLT32: 270 return &elf_howto_table[(int) R_390_GOTPLT32]; 271 case BFD_RELOC_390_GOTPLT64: 272 return &elf_howto_table[(int) R_390_GOTPLT64]; 273 case BFD_RELOC_390_GOTPLTENT: 274 return &elf_howto_table[(int) R_390_GOTPLTENT]; 275 case BFD_RELOC_390_PLTOFF16: 276 return &elf_howto_table[(int) R_390_PLTOFF16]; 277 case BFD_RELOC_390_PLTOFF32: 278 return &elf_howto_table[(int) R_390_PLTOFF32]; 279 case BFD_RELOC_390_PLTOFF64: 280 return &elf_howto_table[(int) R_390_PLTOFF64]; 281 case BFD_RELOC_390_TLS_LOAD: 282 return &elf_howto_table[(int) R_390_TLS_LOAD]; 283 case BFD_RELOC_390_TLS_GDCALL: 284 return &elf_howto_table[(int) R_390_TLS_GDCALL]; 285 case BFD_RELOC_390_TLS_LDCALL: 286 return &elf_howto_table[(int) R_390_TLS_LDCALL]; 287 case BFD_RELOC_390_TLS_GD64: 288 return &elf_howto_table[(int) R_390_TLS_GD64]; 289 case BFD_RELOC_390_TLS_GOTIE12: 290 return &elf_howto_table[(int) R_390_TLS_GOTIE12]; 291 case BFD_RELOC_390_TLS_GOTIE64: 292 return &elf_howto_table[(int) R_390_TLS_GOTIE64]; 293 case BFD_RELOC_390_TLS_LDM64: 294 return &elf_howto_table[(int) R_390_TLS_LDM64]; 295 case BFD_RELOC_390_TLS_IE64: 296 return &elf_howto_table[(int) R_390_TLS_IE64]; 297 case BFD_RELOC_390_TLS_IEENT: 298 return &elf_howto_table[(int) R_390_TLS_IEENT]; 299 case BFD_RELOC_390_TLS_LE64: 300 return &elf_howto_table[(int) R_390_TLS_LE64]; 301 case BFD_RELOC_390_TLS_LDO64: 302 return &elf_howto_table[(int) R_390_TLS_LDO64]; 303 case BFD_RELOC_390_TLS_DTPMOD: 304 return &elf_howto_table[(int) R_390_TLS_DTPMOD]; 305 case BFD_RELOC_390_TLS_DTPOFF: 306 return &elf_howto_table[(int) R_390_TLS_DTPOFF]; 307 case BFD_RELOC_390_TLS_TPOFF: 308 return &elf_howto_table[(int) R_390_TLS_TPOFF]; 309 case BFD_RELOC_390_20: 310 return &elf_howto_table[(int) R_390_20]; 311 case BFD_RELOC_390_GOT20: 312 return &elf_howto_table[(int) R_390_GOT20]; 313 case BFD_RELOC_390_GOTPLT20: 314 return &elf_howto_table[(int) R_390_GOTPLT20]; 315 case BFD_RELOC_390_TLS_GOTIE20: 316 return &elf_howto_table[(int) R_390_TLS_GOTIE20]; 317 case BFD_RELOC_390_IRELATIVE: 318 return &elf_howto_table[(int) R_390_IRELATIVE]; 319 case BFD_RELOC_VTABLE_INHERIT: 320 return &elf64_s390_vtinherit_howto; 321 case BFD_RELOC_VTABLE_ENTRY: 322 return &elf64_s390_vtentry_howto; 323 default: 324 break; 325 } 326 327 /* xgettext:c-format */ 328 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code); 329 bfd_set_error (bfd_error_bad_value); 330 return NULL; 331 } 332 333 static reloc_howto_type * 334 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 335 const char *r_name) 336 { 337 unsigned int i; 338 339 for (i = 0; 340 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); 341 i++) 342 if (elf_howto_table[i].name != NULL 343 && strcasecmp (elf_howto_table[i].name, r_name) == 0) 344 return &elf_howto_table[i]; 345 346 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0) 347 return &elf64_s390_vtinherit_howto; 348 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0) 349 return &elf64_s390_vtentry_howto; 350 351 return NULL; 352 } 353 354 /* We need to use ELF64_R_TYPE so we have our own copy of this function, 355 and elf64-s390.c has its own copy. */ 356 357 static bfd_boolean 358 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 359 arelent *cache_ptr, 360 Elf_Internal_Rela *dst) 361 { 362 unsigned int r_type = ELF64_R_TYPE(dst->r_info); 363 364 switch (r_type) 365 { 366 case R_390_GNU_VTINHERIT: 367 cache_ptr->howto = &elf64_s390_vtinherit_howto; 368 break; 369 370 case R_390_GNU_VTENTRY: 371 cache_ptr->howto = &elf64_s390_vtentry_howto; 372 break; 373 374 default: 375 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0])) 376 { 377 /* xgettext:c-format */ 378 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 379 abfd, r_type); 380 bfd_set_error (bfd_error_bad_value); 381 return FALSE; 382 } 383 cache_ptr->howto = &elf_howto_table[r_type]; 384 } 385 return TRUE; 386 } 387 388 /* A relocation function which doesn't do anything. */ 389 static bfd_reloc_status_type 390 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED, 391 arelent *reloc_entry, 392 asymbol *symbol ATTRIBUTE_UNUSED, 393 void * data ATTRIBUTE_UNUSED, 394 asection *input_section, 395 bfd *output_bfd, 396 char **error_message ATTRIBUTE_UNUSED) 397 { 398 if (output_bfd) 399 reloc_entry->address += input_section->output_offset; 400 return bfd_reloc_ok; 401 } 402 403 /* Handle the large displacement relocs. */ 404 static bfd_reloc_status_type 405 s390_elf_ldisp_reloc (bfd *abfd, 406 arelent *reloc_entry, 407 asymbol *symbol, 408 void * data, 409 asection *input_section, 410 bfd *output_bfd, 411 char **error_message ATTRIBUTE_UNUSED) 412 { 413 reloc_howto_type *howto = reloc_entry->howto; 414 bfd_vma relocation; 415 bfd_vma insn; 416 417 if (output_bfd != (bfd *) NULL 418 && (symbol->flags & BSF_SECTION_SYM) == 0 419 && (! howto->partial_inplace 420 || reloc_entry->addend == 0)) 421 { 422 reloc_entry->address += input_section->output_offset; 423 return bfd_reloc_ok; 424 } 425 if (output_bfd != NULL) 426 return bfd_reloc_continue; 427 428 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 429 return bfd_reloc_outofrange; 430 431 relocation = (symbol->value 432 + symbol->section->output_section->vma 433 + symbol->section->output_offset); 434 relocation += reloc_entry->addend; 435 if (howto->pc_relative) 436 { 437 relocation -= (input_section->output_section->vma 438 + input_section->output_offset); 439 relocation -= reloc_entry->address; 440 } 441 442 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); 443 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; 444 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); 445 446 if ((bfd_signed_vma) relocation < - 0x80000 447 || (bfd_signed_vma) relocation > 0x7ffff) 448 return bfd_reloc_overflow; 449 else 450 return bfd_reloc_ok; 451 } 452 453 static bfd_boolean 454 elf_s390_is_local_label_name (bfd *abfd, const char *name) 455 { 456 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) 457 return TRUE; 458 459 return _bfd_elf_is_local_label_name (abfd, name); 460 } 461 462 /* Functions for the 390 ELF linker. */ 463 464 /* The name of the dynamic interpreter. This is put in the .interp 465 section. */ 466 467 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1" 468 469 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 470 copying dynamic variables from a shared lib into an app's dynbss 471 section, and instead use a dynamic relocation to point into the 472 shared lib. */ 473 #define ELIMINATE_COPY_RELOCS 1 474 475 /* The size in bytes of the first entry in the procedure linkage table. */ 476 #define PLT_FIRST_ENTRY_SIZE 32 477 /* The size in bytes of an entry in the procedure linkage table. */ 478 #define PLT_ENTRY_SIZE 32 479 480 #define GOT_ENTRY_SIZE 8 481 482 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela) 483 484 /* The first three entries in a global offset table are reserved, 485 and the initial contents are unimportant (we zero them out). 486 Subsequent entries look like this. See the SVR4 ABI 386 487 supplement to see how this works. */ 488 489 /* For the s390, simple addr offset can only be 0 - 4096. 490 To use the full 16777216 TB address space, several instructions 491 are needed to load an address in a register and execute 492 a branch( or just saving the address) 493 494 Furthermore, only r 0 and 1 are free to use!!! */ 495 496 /* The first 3 words in the GOT are then reserved. 497 Word 0 is the address of the dynamic table. 498 Word 1 is a pointer to a structure describing the object 499 Word 2 is used to point to the loader entry address. 500 501 The code for PLT entries looks like this: 502 503 The GOT holds the address in the PLT to be executed. 504 The loader then gets: 505 48(15) = Pointer to the structure describing the object. 506 56(15) = Offset in symbol table 507 The loader must then find the module where the function is 508 and insert the address in the GOT. 509 510 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1 511 LG 1,0(1) # 6 bytes Load address from GOT in r1 512 BCR 15,1 # 2 bytes Jump to address 513 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 514 LGF 1,12(1) # 6 bytes Load rela.plt offset into r1 515 BRCL 15,-x # 6 bytes Jump to first PLT entry 516 .long ? # 4 bytes offset into .rela.plt 517 518 Total = 32 bytes per PLT entry 519 Fixup at offset 2: relative address to GOT entry 520 Fixup at offset 22: relative branch to PLT0 521 Fixup at offset 28: 32 bit offset into .rela.plt 522 523 A 32 bit offset into the symbol table is enough. It allows for 524 .rela.plt sections up to a size of 2 gigabyte. A single dynamic 525 object (the main program, any shared library) is limited to 4GB in 526 size. Having a .rela.plt of 2GB would already make the .plt 527 section bigger than 8GB. */ 528 529 static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] = 530 { 531 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */ 532 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */ 533 0x07, 0xf1, /* br %r1 */ 534 0x0d, 0x10, /* basr %r1,%r0 */ 535 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */ 536 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */ 537 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */ 538 }; 539 540 /* The first PLT entry pushes the offset into the symbol table 541 from R1 onto the stack at 56(15) and the loader object info 542 at 48(15), loads the loader address in R1 and jumps to it. */ 543 544 /* The first entry in the PLT: 545 546 PLT0: 547 STG 1,56(15) # r1 contains the offset into the symbol table 548 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table 549 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack 550 LG 1,16(1) # get entry address of loader 551 BCR 15,1 # jump to loader 552 553 Fixup at offset 8: relative address to start of GOT. */ 554 555 static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] = 556 { 557 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */ 558 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */ 559 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */ 560 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */ 561 0x07, 0xf1, /* br %r1 */ 562 0x07, 0x00, /* nopr %r0 */ 563 0x07, 0x00, /* nopr %r0 */ 564 0x07, 0x00 /* nopr %r0 */ 565 }; 566 567 568 /* s390 ELF linker hash entry. */ 569 570 struct elf_s390_link_hash_entry 571 { 572 struct elf_link_hash_entry elf; 573 574 /* Track dynamic relocs copied for this symbol. */ 575 struct elf_dyn_relocs *dyn_relocs; 576 577 /* Number of GOTPLT references for a function. */ 578 bfd_signed_vma gotplt_refcount; 579 580 #define GOT_UNKNOWN 0 581 #define GOT_NORMAL 1 582 #define GOT_TLS_GD 2 583 #define GOT_TLS_IE 3 584 #define GOT_TLS_IE_NLT 3 585 unsigned char tls_type; 586 587 /* For pointer equality reasons we might need to change the symbol 588 type from STT_GNU_IFUNC to STT_FUNC together with its value and 589 section entry. So after alloc_dynrelocs only these values should 590 be used. In order to check whether a symbol is IFUNC use 591 s390_is_ifunc_symbol_p. */ 592 bfd_vma ifunc_resolver_address; 593 asection *ifunc_resolver_section; 594 }; 595 596 #define elf_s390_hash_entry(ent) \ 597 ((struct elf_s390_link_hash_entry *)(ent)) 598 599 /* This structure represents an entry in the local PLT list needed for 600 local IFUNC symbols. */ 601 struct plt_entry 602 { 603 /* The section of the local symbol. 604 Set in relocate_section and used in finish_dynamic_sections. */ 605 asection *sec; 606 607 union 608 { 609 bfd_signed_vma refcount; 610 bfd_vma offset; 611 } plt; 612 }; 613 614 /* NOTE: Keep this structure in sync with 615 the one declared in elf32-s390.c. */ 616 struct elf_s390_obj_tdata 617 { 618 struct elf_obj_tdata root; 619 620 /* A local PLT is needed for ifunc symbols. */ 621 struct plt_entry *local_plt; 622 623 /* TLS type for each local got entry. */ 624 char *local_got_tls_type; 625 }; 626 627 #define elf_s390_tdata(abfd) \ 628 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) 629 630 #define elf_s390_local_plt(abfd) \ 631 (elf_s390_tdata (abfd)->local_plt) 632 633 #define elf_s390_local_got_tls_type(abfd) \ 634 (elf_s390_tdata (abfd)->local_got_tls_type) 635 636 #define is_s390_elf(bfd) \ 637 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 638 && elf_tdata (bfd) != NULL \ 639 && elf_object_id (bfd) == S390_ELF_DATA) 640 641 static bfd_boolean 642 elf_s390_mkobject (bfd *abfd) 643 { 644 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata), 645 S390_ELF_DATA); 646 } 647 648 static bfd_boolean 649 elf_s390_object_p (bfd *abfd) 650 { 651 /* Set the right machine number for an s390 elf32 file. */ 652 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64); 653 } 654 655 /* s390 ELF linker hash table. */ 656 657 struct elf_s390_link_hash_table 658 { 659 struct elf_link_hash_table elf; 660 661 /* Short-cuts to get to dynamic linker sections. */ 662 asection *irelifunc; 663 664 union { 665 bfd_signed_vma refcount; 666 bfd_vma offset; 667 } tls_ldm_got; 668 669 /* Small local sym cache. */ 670 struct sym_cache sym_cache; 671 672 /* Options passed from the linker. */ 673 struct s390_elf_params *params; 674 }; 675 676 /* Get the s390 ELF linker hash table from a link_info structure. */ 677 678 #define elf_s390_hash_table(p) \ 679 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 680 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL) 681 682 #define ELF64 1 683 #include "elf-s390-common.c" 684 685 /* Create an entry in an s390 ELF linker hash table. */ 686 687 static struct bfd_hash_entry * 688 link_hash_newfunc (struct bfd_hash_entry *entry, 689 struct bfd_hash_table *table, 690 const char *string) 691 { 692 /* Allocate the structure if it has not already been allocated by a 693 subclass. */ 694 if (entry == NULL) 695 { 696 entry = bfd_hash_allocate (table, 697 sizeof (struct elf_s390_link_hash_entry)); 698 if (entry == NULL) 699 return entry; 700 } 701 702 /* Call the allocation method of the superclass. */ 703 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 704 if (entry != NULL) 705 { 706 struct elf_s390_link_hash_entry *eh; 707 708 eh = (struct elf_s390_link_hash_entry *) entry; 709 eh->dyn_relocs = NULL; 710 eh->gotplt_refcount = 0; 711 eh->tls_type = GOT_UNKNOWN; 712 eh->ifunc_resolver_address = 0; 713 eh->ifunc_resolver_section = NULL; 714 } 715 716 return entry; 717 } 718 719 /* Create an s390 ELF linker hash table. */ 720 721 static struct bfd_link_hash_table * 722 elf_s390_link_hash_table_create (bfd *abfd) 723 { 724 struct elf_s390_link_hash_table *ret; 725 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); 726 727 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt); 728 if (ret == NULL) 729 return NULL; 730 731 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, 732 sizeof (struct elf_s390_link_hash_entry), 733 S390_ELF_DATA)) 734 { 735 free (ret); 736 return NULL; 737 } 738 739 return &ret->elf.root; 740 } 741 742 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 743 744 static void 745 elf_s390_copy_indirect_symbol (struct bfd_link_info *info, 746 struct elf_link_hash_entry *dir, 747 struct elf_link_hash_entry *ind) 748 { 749 struct elf_s390_link_hash_entry *edir, *eind; 750 751 edir = (struct elf_s390_link_hash_entry *) dir; 752 eind = (struct elf_s390_link_hash_entry *) ind; 753 754 if (eind->dyn_relocs != NULL) 755 { 756 if (edir->dyn_relocs != NULL) 757 { 758 struct elf_dyn_relocs **pp; 759 struct elf_dyn_relocs *p; 760 761 /* Add reloc counts against the indirect sym to the direct sym 762 list. Merge any entries against the same section. */ 763 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 764 { 765 struct elf_dyn_relocs *q; 766 767 for (q = edir->dyn_relocs; q != NULL; q = q->next) 768 if (q->sec == p->sec) 769 { 770 q->pc_count += p->pc_count; 771 q->count += p->count; 772 *pp = p->next; 773 break; 774 } 775 if (q == NULL) 776 pp = &p->next; 777 } 778 *pp = edir->dyn_relocs; 779 } 780 781 edir->dyn_relocs = eind->dyn_relocs; 782 eind->dyn_relocs = NULL; 783 } 784 785 if (ind->root.type == bfd_link_hash_indirect 786 && dir->got.refcount <= 0) 787 { 788 edir->tls_type = eind->tls_type; 789 eind->tls_type = GOT_UNKNOWN; 790 } 791 792 if (ELIMINATE_COPY_RELOCS 793 && ind->root.type != bfd_link_hash_indirect 794 && dir->dynamic_adjusted) 795 { 796 /* If called to transfer flags for a weakdef during processing 797 of elf_adjust_dynamic_symbol, don't copy non_got_ref. 798 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 799 if (dir->versioned != versioned_hidden) 800 dir->ref_dynamic |= ind->ref_dynamic; 801 dir->ref_regular |= ind->ref_regular; 802 dir->ref_regular_nonweak |= ind->ref_regular_nonweak; 803 dir->needs_plt |= ind->needs_plt; 804 } 805 else 806 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 807 } 808 809 static int 810 elf_s390_tls_transition (struct bfd_link_info *info, 811 int r_type, 812 int is_local) 813 { 814 if (bfd_link_pic (info)) 815 return r_type; 816 817 switch (r_type) 818 { 819 case R_390_TLS_GD64: 820 case R_390_TLS_IE64: 821 if (is_local) 822 return R_390_TLS_LE64; 823 return R_390_TLS_IE64; 824 case R_390_TLS_GOTIE64: 825 if (is_local) 826 return R_390_TLS_LE64; 827 return R_390_TLS_GOTIE64; 828 case R_390_TLS_LDM64: 829 return R_390_TLS_LE64; 830 } 831 832 return r_type; 833 } 834 835 /* Look through the relocs for a section during the first phase, and 836 allocate space in the global offset table or procedure linkage 837 table. */ 838 839 static bfd_boolean 840 elf_s390_check_relocs (bfd *abfd, 841 struct bfd_link_info *info, 842 asection *sec, 843 const Elf_Internal_Rela *relocs) 844 { 845 struct elf_s390_link_hash_table *htab; 846 Elf_Internal_Shdr *symtab_hdr; 847 struct elf_link_hash_entry **sym_hashes; 848 const Elf_Internal_Rela *rel; 849 const Elf_Internal_Rela *rel_end; 850 asection *sreloc; 851 bfd_signed_vma *local_got_refcounts; 852 int tls_type, old_tls_type; 853 854 if (bfd_link_relocatable (info)) 855 return TRUE; 856 857 BFD_ASSERT (is_s390_elf (abfd)); 858 859 htab = elf_s390_hash_table (info); 860 if (htab == NULL) 861 return FALSE; 862 863 symtab_hdr = &elf_symtab_hdr (abfd); 864 sym_hashes = elf_sym_hashes (abfd); 865 local_got_refcounts = elf_local_got_refcounts (abfd); 866 867 sreloc = NULL; 868 869 rel_end = relocs + sec->reloc_count; 870 for (rel = relocs; rel < rel_end; rel++) 871 { 872 unsigned int r_type; 873 unsigned int r_symndx; 874 struct elf_link_hash_entry *h; 875 Elf_Internal_Sym *isym; 876 877 r_symndx = ELF64_R_SYM (rel->r_info); 878 879 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) 880 { 881 /* xgettext:c-format */ 882 _bfd_error_handler (_("%pB: bad symbol index: %d"), 883 abfd, r_symndx); 884 return FALSE; 885 } 886 887 if (r_symndx < symtab_hdr->sh_info) 888 { 889 /* A local symbol. */ 890 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 891 abfd, r_symndx); 892 if (isym == NULL) 893 return FALSE; 894 895 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 896 { 897 struct plt_entry *plt; 898 899 if (htab->elf.dynobj == NULL) 900 htab->elf.dynobj = abfd; 901 902 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) 903 return FALSE; 904 905 if (local_got_refcounts == NULL) 906 { 907 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr)) 908 return FALSE; 909 local_got_refcounts = elf_local_got_refcounts (abfd); 910 } 911 plt = elf_s390_local_plt (abfd); 912 plt[r_symndx].plt.refcount++; 913 } 914 h = NULL; 915 } 916 else 917 { 918 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 919 while (h->root.type == bfd_link_hash_indirect 920 || h->root.type == bfd_link_hash_warning) 921 h = (struct elf_link_hash_entry *) h->root.u.i.link; 922 } 923 924 /* Create got section and local_got_refcounts array if they 925 are needed. */ 926 r_type = elf_s390_tls_transition (info, 927 ELF64_R_TYPE (rel->r_info), 928 h == NULL); 929 switch (r_type) 930 { 931 case R_390_GOT12: 932 case R_390_GOT16: 933 case R_390_GOT20: 934 case R_390_GOT32: 935 case R_390_GOT64: 936 case R_390_GOTENT: 937 case R_390_GOTPLT12: 938 case R_390_GOTPLT16: 939 case R_390_GOTPLT20: 940 case R_390_GOTPLT32: 941 case R_390_GOTPLT64: 942 case R_390_GOTPLTENT: 943 case R_390_TLS_GD64: 944 case R_390_TLS_GOTIE12: 945 case R_390_TLS_GOTIE20: 946 case R_390_TLS_GOTIE64: 947 case R_390_TLS_IEENT: 948 case R_390_TLS_IE64: 949 case R_390_TLS_LDM64: 950 if (h == NULL 951 && local_got_refcounts == NULL) 952 { 953 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr)) 954 return FALSE; 955 local_got_refcounts = elf_local_got_refcounts (abfd); 956 } 957 958 /* Fall through. */ 959 case R_390_GOTOFF16: 960 case R_390_GOTOFF32: 961 case R_390_GOTOFF64: 962 case R_390_GOTPC: 963 case R_390_GOTPCDBL: 964 if (htab->elf.sgot == NULL) 965 { 966 if (htab->elf.dynobj == NULL) 967 htab->elf.dynobj = abfd; 968 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) 969 return FALSE; 970 } 971 } 972 973 if (h != NULL) 974 { 975 if (htab->elf.dynobj == NULL) 976 htab->elf.dynobj = abfd; 977 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) 978 return FALSE; 979 980 /* Make sure an IFUNC symbol defined in a non-shared object 981 always gets a PLT slot. */ 982 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 983 { 984 /* The symbol is called by the dynamic loader in order 985 to resolve the relocation. So it is in fact also 986 referenced. */ 987 h->ref_regular = 1; 988 h->needs_plt = 1; 989 } 990 } 991 992 switch (r_type) 993 { 994 case R_390_GOTPC: 995 case R_390_GOTPCDBL: 996 /* These relocs do not need a GOT slot. They just load the 997 GOT pointer itself or address something else relative to 998 the GOT. Since the GOT pointer has been set up above we 999 are done. */ 1000 break; 1001 case R_390_GOTOFF16: 1002 case R_390_GOTOFF32: 1003 case R_390_GOTOFF64: 1004 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular) 1005 break; 1006 /* Fall through. */ 1007 1008 case R_390_PLT12DBL: 1009 case R_390_PLT16DBL: 1010 case R_390_PLT24DBL: 1011 case R_390_PLT32: 1012 case R_390_PLT32DBL: 1013 case R_390_PLT64: 1014 case R_390_PLTOFF16: 1015 case R_390_PLTOFF32: 1016 case R_390_PLTOFF64: 1017 /* This symbol requires a procedure linkage table entry. We 1018 actually build the entry in adjust_dynamic_symbol, 1019 because this might be a case of linking PIC code which is 1020 never referenced by a dynamic object, in which case we 1021 don't need to generate a procedure linkage table entry 1022 after all. */ 1023 1024 /* If this is a local symbol, we resolve it directly without 1025 creating a procedure linkage table entry. */ 1026 if (h != NULL) 1027 { 1028 h->needs_plt = 1; 1029 h->plt.refcount += 1; 1030 } 1031 break; 1032 1033 case R_390_GOTPLT12: 1034 case R_390_GOTPLT16: 1035 case R_390_GOTPLT20: 1036 case R_390_GOTPLT32: 1037 case R_390_GOTPLT64: 1038 case R_390_GOTPLTENT: 1039 /* This symbol requires either a procedure linkage table entry 1040 or an entry in the local got. We actually build the entry 1041 in adjust_dynamic_symbol because whether this is really a 1042 global reference can change and with it the fact if we have 1043 to create a plt entry or a local got entry. To be able to 1044 make a once global symbol a local one we have to keep track 1045 of the number of gotplt references that exist for this 1046 symbol. */ 1047 if (h != NULL) 1048 { 1049 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; 1050 h->needs_plt = 1; 1051 h->plt.refcount += 1; 1052 } 1053 else 1054 local_got_refcounts[r_symndx] += 1; 1055 break; 1056 1057 case R_390_TLS_LDM64: 1058 htab->tls_ldm_got.refcount += 1; 1059 break; 1060 1061 case R_390_TLS_IE64: 1062 case R_390_TLS_GOTIE12: 1063 case R_390_TLS_GOTIE20: 1064 case R_390_TLS_GOTIE64: 1065 case R_390_TLS_IEENT: 1066 if (bfd_link_pic (info)) 1067 info->flags |= DF_STATIC_TLS; 1068 /* Fall through */ 1069 1070 case R_390_GOT12: 1071 case R_390_GOT16: 1072 case R_390_GOT20: 1073 case R_390_GOT32: 1074 case R_390_GOT64: 1075 case R_390_GOTENT: 1076 case R_390_TLS_GD64: 1077 /* This symbol requires a global offset table entry. */ 1078 switch (r_type) 1079 { 1080 default: 1081 case R_390_GOT12: 1082 case R_390_GOT16: 1083 case R_390_GOT20: 1084 case R_390_GOT32: 1085 case R_390_GOTENT: 1086 tls_type = GOT_NORMAL; 1087 break; 1088 case R_390_TLS_GD64: 1089 tls_type = GOT_TLS_GD; 1090 break; 1091 case R_390_TLS_IE64: 1092 case R_390_TLS_GOTIE64: 1093 tls_type = GOT_TLS_IE; 1094 break; 1095 case R_390_TLS_GOTIE12: 1096 case R_390_TLS_GOTIE20: 1097 case R_390_TLS_IEENT: 1098 tls_type = GOT_TLS_IE_NLT; 1099 break; 1100 } 1101 1102 if (h != NULL) 1103 { 1104 h->got.refcount += 1; 1105 old_tls_type = elf_s390_hash_entry(h)->tls_type; 1106 } 1107 else 1108 { 1109 local_got_refcounts[r_symndx] += 1; 1110 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; 1111 } 1112 /* If a TLS symbol is accessed using IE at least once, 1113 there is no point to use dynamic model for it. */ 1114 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) 1115 { 1116 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) 1117 { 1118 _bfd_error_handler 1119 /* xgettext:c-format */ 1120 (_("%pB: `%s' accessed both as normal and thread local symbol"), 1121 abfd, h->root.root.string); 1122 return FALSE; 1123 } 1124 if (old_tls_type > tls_type) 1125 tls_type = old_tls_type; 1126 } 1127 1128 if (old_tls_type != tls_type) 1129 { 1130 if (h != NULL) 1131 elf_s390_hash_entry (h)->tls_type = tls_type; 1132 else 1133 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; 1134 } 1135 1136 if (r_type != R_390_TLS_IE64) 1137 break; 1138 /* Fall through */ 1139 1140 case R_390_TLS_LE64: 1141 /* For static linking and executables this reloc will be 1142 calculated at linktime otherwise a TLS_TPOFF runtime 1143 reloc will be generated. */ 1144 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info)) 1145 break; 1146 1147 if (!bfd_link_pic (info)) 1148 break; 1149 info->flags |= DF_STATIC_TLS; 1150 /* Fall through */ 1151 1152 case R_390_8: 1153 case R_390_16: 1154 case R_390_32: 1155 case R_390_64: 1156 case R_390_PC12DBL: 1157 case R_390_PC16: 1158 case R_390_PC16DBL: 1159 case R_390_PC24DBL: 1160 case R_390_PC32: 1161 case R_390_PC32DBL: 1162 case R_390_PC64: 1163 if (h != NULL && bfd_link_executable (info)) 1164 { 1165 /* If this reloc is in a read-only section, we might 1166 need a copy reloc. We can't check reliably at this 1167 stage whether the section is read-only, as input 1168 sections have not yet been mapped to output sections. 1169 Tentatively set the flag for now, and correct in 1170 adjust_dynamic_symbol. */ 1171 h->non_got_ref = 1; 1172 1173 if (!bfd_link_pic (info)) 1174 { 1175 /* We may need a .plt entry if the function this reloc 1176 refers to is in a shared lib. */ 1177 h->plt.refcount += 1; 1178 } 1179 } 1180 1181 /* If we are creating a shared library, and this is a reloc 1182 against a global symbol, or a non PC relative reloc 1183 against a local symbol, then we need to copy the reloc 1184 into the shared library. However, if we are linking with 1185 -Bsymbolic, we do not need to copy a reloc against a 1186 global symbol which is defined in an object we are 1187 including in the link (i.e., DEF_REGULAR is set). At 1188 this point we have not seen all the input files, so it is 1189 possible that DEF_REGULAR is not set now but will be set 1190 later (it is never cleared). In case of a weak definition, 1191 DEF_REGULAR may be cleared later by a strong definition in 1192 a shared library. We account for that possibility below by 1193 storing information in the relocs_copied field of the hash 1194 table entry. A similar situation occurs when creating 1195 shared libraries and symbol visibility changes render the 1196 symbol local. 1197 1198 If on the other hand, we are creating an executable, we 1199 may need to keep relocations for symbols satisfied by a 1200 dynamic library if we manage to avoid copy relocs for the 1201 symbol. */ 1202 if ((bfd_link_pic (info) 1203 && (sec->flags & SEC_ALLOC) != 0 1204 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16 1205 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL 1206 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL 1207 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL 1208 && ELF64_R_TYPE (rel->r_info) != R_390_PC32 1209 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL 1210 && ELF64_R_TYPE (rel->r_info) != R_390_PC64) 1211 || (h != NULL 1212 && (! SYMBOLIC_BIND (info, h) 1213 || h->root.type == bfd_link_hash_defweak 1214 || !h->def_regular)))) 1215 || (ELIMINATE_COPY_RELOCS 1216 && !bfd_link_pic (info) 1217 && (sec->flags & SEC_ALLOC) != 0 1218 && h != NULL 1219 && (h->root.type == bfd_link_hash_defweak 1220 || !h->def_regular))) 1221 { 1222 struct elf_dyn_relocs *p; 1223 struct elf_dyn_relocs **head; 1224 1225 /* We must copy these reloc types into the output file. 1226 Create a reloc section in dynobj and make room for 1227 this reloc. */ 1228 if (sreloc == NULL) 1229 { 1230 if (htab->elf.dynobj == NULL) 1231 htab->elf.dynobj = abfd; 1232 1233 sreloc = _bfd_elf_make_dynamic_reloc_section 1234 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE); 1235 1236 if (sreloc == NULL) 1237 return FALSE; 1238 } 1239 1240 /* If this is a global symbol, we count the number of 1241 relocations we need for this symbol. */ 1242 if (h != NULL) 1243 { 1244 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; 1245 } 1246 else 1247 { 1248 /* Track dynamic relocs needed for local syms too. 1249 We really need local syms available to do this 1250 easily. Oh well. */ 1251 asection *s; 1252 void *vpp; 1253 1254 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 1255 abfd, r_symndx); 1256 if (isym == NULL) 1257 return FALSE; 1258 1259 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 1260 if (s == NULL) 1261 s = sec; 1262 1263 vpp = &elf_section_data (s)->local_dynrel; 1264 head = (struct elf_dyn_relocs **) vpp; 1265 } 1266 1267 p = *head; 1268 if (p == NULL || p->sec != sec) 1269 { 1270 bfd_size_type amt = sizeof *p; 1271 p = ((struct elf_dyn_relocs *) 1272 bfd_alloc (htab->elf.dynobj, amt)); 1273 if (p == NULL) 1274 return FALSE; 1275 p->next = *head; 1276 *head = p; 1277 p->sec = sec; 1278 p->count = 0; 1279 p->pc_count = 0; 1280 } 1281 1282 p->count += 1; 1283 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16 1284 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL 1285 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL 1286 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL 1287 || ELF64_R_TYPE (rel->r_info) == R_390_PC32 1288 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL 1289 || ELF64_R_TYPE (rel->r_info) == R_390_PC64) 1290 p->pc_count += 1; 1291 } 1292 break; 1293 1294 /* This relocation describes the C++ object vtable hierarchy. 1295 Reconstruct it for later use during GC. */ 1296 case R_390_GNU_VTINHERIT: 1297 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1298 return FALSE; 1299 break; 1300 1301 /* This relocation describes which C++ vtable entries are actually 1302 used. Record for later use during GC. */ 1303 case R_390_GNU_VTENTRY: 1304 BFD_ASSERT (h != NULL); 1305 if (h != NULL 1306 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1307 return FALSE; 1308 break; 1309 1310 default: 1311 break; 1312 } 1313 } 1314 1315 return TRUE; 1316 } 1317 1318 /* Return the section that should be marked against GC for a given 1319 relocation. */ 1320 1321 static asection * 1322 elf_s390_gc_mark_hook (asection *sec, 1323 struct bfd_link_info *info, 1324 Elf_Internal_Rela *rel, 1325 struct elf_link_hash_entry *h, 1326 Elf_Internal_Sym *sym) 1327 { 1328 if (h != NULL) 1329 switch (ELF64_R_TYPE (rel->r_info)) 1330 { 1331 case R_390_GNU_VTINHERIT: 1332 case R_390_GNU_VTENTRY: 1333 return NULL; 1334 } 1335 1336 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1337 } 1338 1339 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT 1340 entry but we found we will not create any. Called when we find we will 1341 not have any PLT for this symbol, by for example 1342 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, 1343 or elf_s390_size_dynamic_sections if no dynamic sections will be 1344 created (we're only linking static objects). */ 1345 1346 static void 1347 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h) 1348 { 1349 if (h->elf.root.type == bfd_link_hash_warning) 1350 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; 1351 1352 if (h->gotplt_refcount <= 0) 1353 return; 1354 1355 /* We simply add the number of gotplt references to the number 1356 * of got references for this symbol. */ 1357 h->elf.got.refcount += h->gotplt_refcount; 1358 h->gotplt_refcount = -1; 1359 } 1360 1361 /* Find dynamic relocs for H that apply to read-only sections. */ 1362 1363 static asection * 1364 readonly_dynrelocs (struct elf_link_hash_entry *h) 1365 { 1366 struct elf_dyn_relocs *p; 1367 1368 for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) 1369 { 1370 asection *s = p->sec->output_section; 1371 1372 if (s != NULL && (s->flags & SEC_READONLY) != 0) 1373 return p->sec; 1374 } 1375 return NULL; 1376 } 1377 1378 /* Adjust a symbol defined by a dynamic object and referenced by a 1379 regular object. The current definition is in some section of the 1380 dynamic object, but we're not including those sections. We have to 1381 change the definition to something the rest of the link can 1382 understand. */ 1383 1384 static bfd_boolean 1385 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info, 1386 struct elf_link_hash_entry *h) 1387 { 1388 struct elf_s390_link_hash_table *htab; 1389 asection *s, *srel; 1390 1391 /* STT_GNU_IFUNC symbol must go through PLT. */ 1392 if (s390_is_ifunc_symbol_p (h)) 1393 { 1394 /* All local STT_GNU_IFUNC references must be treated as local 1395 calls via local PLT. */ 1396 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h)) 1397 { 1398 bfd_size_type pc_count = 0, count = 0; 1399 struct elf_dyn_relocs **pp; 1400 struct elf_s390_link_hash_entry *eh; 1401 struct elf_dyn_relocs *p; 1402 1403 eh = (struct elf_s390_link_hash_entry *) h; 1404 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 1405 { 1406 pc_count += p->pc_count; 1407 p->count -= p->pc_count; 1408 p->pc_count = 0; 1409 count += p->count; 1410 if (p->count == 0) 1411 *pp = p->next; 1412 else 1413 pp = &p->next; 1414 } 1415 1416 if (pc_count || count) 1417 { 1418 h->needs_plt = 1; 1419 h->non_got_ref = 1; 1420 if (h->plt.refcount <= 0) 1421 h->plt.refcount = 1; 1422 else 1423 h->plt.refcount += 1; 1424 } 1425 } 1426 1427 if (h->plt.refcount <= 0) 1428 { 1429 h->plt.offset = (bfd_vma) -1; 1430 h->needs_plt = 0; 1431 } 1432 return TRUE; 1433 } 1434 1435 /* If this is a function, put it in the procedure linkage table. We 1436 will fill in the contents of the procedure linkage table later 1437 (although we could actually do it here). */ 1438 if (h->type == STT_FUNC 1439 || h->needs_plt) 1440 { 1441 if (h->plt.refcount <= 0 1442 || SYMBOL_CALLS_LOCAL (info, h) 1443 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) 1444 { 1445 /* This case can occur if we saw a PLT32 reloc in an input 1446 file, but the symbol was never referred to by a dynamic 1447 object, or if all references were garbage collected. In 1448 such a case, we don't actually need to build a procedure 1449 linkage table, and we can just do a PC32 reloc instead. */ 1450 h->plt.offset = (bfd_vma) -1; 1451 h->needs_plt = 0; 1452 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1453 } 1454 1455 return TRUE; 1456 } 1457 else 1458 /* It's possible that we incorrectly decided a .plt reloc was 1459 needed for an R_390_PC32 reloc to a non-function sym in 1460 check_relocs. We can't decide accurately between function and 1461 non-function syms in check-relocs; Objects loaded later in 1462 the link may change h->type. So fix it now. */ 1463 h->plt.offset = (bfd_vma) -1; 1464 1465 /* If this is a weak symbol, and there is a real definition, the 1466 processor independent code will have arranged for us to see the 1467 real definition first, and we can just use the same value. */ 1468 if (h->is_weakalias) 1469 { 1470 struct elf_link_hash_entry *def = weakdef (h); 1471 BFD_ASSERT (def->root.type == bfd_link_hash_defined); 1472 h->root.u.def.section = def->root.u.def.section; 1473 h->root.u.def.value = def->root.u.def.value; 1474 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) 1475 h->non_got_ref = def->non_got_ref; 1476 return TRUE; 1477 } 1478 1479 /* This is a reference to a symbol defined by a dynamic object which 1480 is not a function. */ 1481 1482 /* If we are creating a shared library, we must presume that the 1483 only references to the symbol are via the global offset table. 1484 For such cases we need not do anything here; the relocations will 1485 be handled correctly by relocate_section. */ 1486 if (bfd_link_pic (info)) 1487 return TRUE; 1488 1489 /* If there are no references to this symbol that do not use the 1490 GOT, we don't need to generate a copy reloc. */ 1491 if (!h->non_got_ref) 1492 return TRUE; 1493 1494 /* If -z nocopyreloc was given, we won't generate them either. */ 1495 if (info->nocopyreloc) 1496 { 1497 h->non_got_ref = 0; 1498 return TRUE; 1499 } 1500 1501 /* If we don't find any dynamic relocs in read-only sections, then 1502 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 1503 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h)) 1504 { 1505 h->non_got_ref = 0; 1506 return TRUE; 1507 } 1508 1509 /* We must allocate the symbol in our .dynbss section, which will 1510 become part of the .bss section of the executable. There will be 1511 an entry for this symbol in the .dynsym section. The dynamic 1512 object will contain position independent code, so all references 1513 from the dynamic object to this symbol will go through the global 1514 offset table. The dynamic linker will use the .dynsym entry to 1515 determine the address it must put in the global offset table, so 1516 both the dynamic object and the regular object will refer to the 1517 same memory location for the variable. */ 1518 1519 htab = elf_s390_hash_table (info); 1520 if (htab == NULL) 1521 return FALSE; 1522 1523 /* We must generate a R_390_COPY reloc to tell the dynamic linker to 1524 copy the initial value out of the dynamic object and into the 1525 runtime process image. */ 1526 if ((h->root.u.def.section->flags & SEC_READONLY) != 0) 1527 { 1528 s = htab->elf.sdynrelro; 1529 srel = htab->elf.sreldynrelro; 1530 } 1531 else 1532 { 1533 s = htab->elf.sdynbss; 1534 srel = htab->elf.srelbss; 1535 } 1536 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 1537 { 1538 srel->size += sizeof (Elf64_External_Rela); 1539 h->needs_copy = 1; 1540 } 1541 1542 return _bfd_elf_adjust_dynamic_copy (info, h, s); 1543 } 1544 1545 /* Allocate space in .plt, .got and associated reloc sections for 1546 dynamic relocs. */ 1547 1548 static bfd_boolean 1549 allocate_dynrelocs (struct elf_link_hash_entry *h, 1550 void * inf) 1551 { 1552 struct bfd_link_info *info; 1553 struct elf_s390_link_hash_table *htab; 1554 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h; 1555 struct elf_dyn_relocs *p; 1556 1557 if (h->root.type == bfd_link_hash_indirect) 1558 return TRUE; 1559 1560 info = (struct bfd_link_info *) inf; 1561 htab = elf_s390_hash_table (info); 1562 if (htab == NULL) 1563 return FALSE; 1564 1565 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it 1566 here if it is defined and referenced in a non-shared object. */ 1567 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 1568 return s390_elf_allocate_ifunc_dyn_relocs (info, h); 1569 else if (htab->elf.dynamic_sections_created 1570 && h->plt.refcount > 0) 1571 { 1572 /* Make sure this symbol is output as a dynamic symbol. 1573 Undefined weak syms won't yet be marked as dynamic. */ 1574 if (h->dynindx == -1 1575 && !h->forced_local) 1576 { 1577 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1578 return FALSE; 1579 } 1580 1581 if (bfd_link_pic (info) 1582 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) 1583 { 1584 asection *s = htab->elf.splt; 1585 1586 /* If this is the first .plt entry, make room for the special 1587 first entry. */ 1588 if (s->size == 0) 1589 s->size += PLT_FIRST_ENTRY_SIZE; 1590 1591 h->plt.offset = s->size; 1592 1593 /* If this symbol is not defined in a regular file, and we are 1594 not generating a shared library, then set the symbol to this 1595 location in the .plt. This is required to make function 1596 pointers compare as equal between the normal executable and 1597 the shared library. */ 1598 if (! bfd_link_pic (info) 1599 && !h->def_regular) 1600 { 1601 h->root.u.def.section = s; 1602 h->root.u.def.value = h->plt.offset; 1603 } 1604 1605 /* Make room for this entry. */ 1606 s->size += PLT_ENTRY_SIZE; 1607 1608 /* We also need to make an entry in the .got.plt section. */ 1609 htab->elf.sgotplt->size += GOT_ENTRY_SIZE; 1610 1611 /* We also need to make an entry in the .rela.plt section. */ 1612 htab->elf.srelplt->size += sizeof (Elf64_External_Rela); 1613 } 1614 else 1615 { 1616 h->plt.offset = (bfd_vma) -1; 1617 h->needs_plt = 0; 1618 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1619 } 1620 } 1621 else 1622 { 1623 h->plt.offset = (bfd_vma) -1; 1624 h->needs_plt = 0; 1625 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1626 } 1627 1628 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to 1629 the binary, we can optimize a bit. IE64 and GOTIE64 get converted 1630 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT 1631 we can save the dynamic TLS relocation. */ 1632 if (h->got.refcount > 0 1633 && !bfd_link_pic (info) 1634 && h->dynindx == -1 1635 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) 1636 { 1637 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) 1638 /* For the GOTIE access without a literal pool entry the offset has 1639 to be stored somewhere. The immediate value in the instruction 1640 is not bit enough so the value is stored in the got. */ 1641 { 1642 h->got.offset = htab->elf.sgot->size; 1643 htab->elf.sgot->size += GOT_ENTRY_SIZE; 1644 } 1645 else 1646 h->got.offset = (bfd_vma) -1; 1647 } 1648 else if (h->got.refcount > 0) 1649 { 1650 asection *s; 1651 bfd_boolean dyn; 1652 int tls_type = elf_s390_hash_entry(h)->tls_type; 1653 1654 /* Make sure this symbol is output as a dynamic symbol. 1655 Undefined weak syms won't yet be marked as dynamic. */ 1656 if (h->dynindx == -1 1657 && !h->forced_local) 1658 { 1659 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1660 return FALSE; 1661 } 1662 1663 s = htab->elf.sgot; 1664 h->got.offset = s->size; 1665 s->size += GOT_ENTRY_SIZE; 1666 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */ 1667 if (tls_type == GOT_TLS_GD) 1668 s->size += GOT_ENTRY_SIZE; 1669 dyn = htab->elf.dynamic_sections_created; 1670 /* R_390_TLS_IE64 needs one dynamic relocation, 1671 R_390_TLS_GD64 needs one if local symbol and two if global. */ 1672 if ((tls_type == GOT_TLS_GD && h->dynindx == -1) 1673 || tls_type >= GOT_TLS_IE) 1674 htab->elf.srelgot->size += sizeof (Elf64_External_Rela); 1675 else if (tls_type == GOT_TLS_GD) 1676 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela); 1677 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h) 1678 && (bfd_link_pic (info) 1679 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) 1680 htab->elf.srelgot->size += sizeof (Elf64_External_Rela); 1681 } 1682 else 1683 h->got.offset = (bfd_vma) -1; 1684 1685 if (eh->dyn_relocs == NULL) 1686 return TRUE; 1687 1688 /* In the shared -Bsymbolic case, discard space allocated for 1689 dynamic pc-relative relocs against symbols which turn out to be 1690 defined in regular objects. For the normal shared case, discard 1691 space for pc-relative relocs that have become local due to symbol 1692 visibility changes. */ 1693 1694 if (bfd_link_pic (info)) 1695 { 1696 if (SYMBOL_CALLS_LOCAL (info, h)) 1697 { 1698 struct elf_dyn_relocs **pp; 1699 1700 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 1701 { 1702 p->count -= p->pc_count; 1703 p->pc_count = 0; 1704 if (p->count == 0) 1705 *pp = p->next; 1706 else 1707 pp = &p->next; 1708 } 1709 } 1710 1711 /* Also discard relocs on undefined weak syms with non-default 1712 visibility. */ 1713 if (eh->dyn_relocs != NULL 1714 && h->root.type == bfd_link_hash_undefweak) 1715 { 1716 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 1717 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) 1718 eh->dyn_relocs = NULL; 1719 1720 /* Make sure undefined weak symbols are output as a dynamic 1721 symbol in PIEs. */ 1722 else if (h->dynindx == -1 1723 && !h->forced_local) 1724 { 1725 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1726 return FALSE; 1727 } 1728 } 1729 } 1730 else if (ELIMINATE_COPY_RELOCS) 1731 { 1732 /* For the non-shared case, discard space for relocs against 1733 symbols which turn out to need copy relocs or are not 1734 dynamic. */ 1735 1736 if (!h->non_got_ref 1737 && ((h->def_dynamic 1738 && !h->def_regular) 1739 || (htab->elf.dynamic_sections_created 1740 && (h->root.type == bfd_link_hash_undefweak 1741 || h->root.type == bfd_link_hash_undefined)))) 1742 { 1743 /* Make sure this symbol is output as a dynamic symbol. 1744 Undefined weak syms won't yet be marked as dynamic. */ 1745 if (h->dynindx == -1 1746 && !h->forced_local) 1747 { 1748 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1749 return FALSE; 1750 } 1751 1752 /* If that succeeded, we know we'll be keeping all the 1753 relocs. */ 1754 if (h->dynindx != -1) 1755 goto keep; 1756 } 1757 1758 eh->dyn_relocs = NULL; 1759 1760 keep: ; 1761 } 1762 1763 /* Finally, allocate space. */ 1764 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1765 { 1766 asection *sreloc = elf_section_data (p->sec)->sreloc; 1767 sreloc->size += p->count * sizeof (Elf64_External_Rela); 1768 } 1769 1770 return TRUE; 1771 } 1772 1773 /* Set DF_TEXTREL if we find any dynamic relocs that apply to 1774 read-only sections. */ 1775 1776 static bfd_boolean 1777 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p) 1778 { 1779 asection *sec; 1780 1781 if (h->root.type == bfd_link_hash_indirect) 1782 return TRUE; 1783 1784 sec = readonly_dynrelocs (h); 1785 if (sec != NULL) 1786 { 1787 struct bfd_link_info *info = (struct bfd_link_info *) info_p; 1788 1789 info->flags |= DF_TEXTREL; 1790 info->callbacks->minfo 1791 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"), 1792 sec->owner, h->root.root.string, sec); 1793 1794 /* Not an error, just cut short the traversal. */ 1795 return FALSE; 1796 } 1797 return TRUE; 1798 } 1799 1800 /* Set the sizes of the dynamic sections. */ 1801 1802 static bfd_boolean 1803 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 1804 struct bfd_link_info *info) 1805 { 1806 struct elf_s390_link_hash_table *htab; 1807 bfd *dynobj; 1808 asection *s; 1809 bfd_boolean relocs; 1810 bfd *ibfd; 1811 1812 htab = elf_s390_hash_table (info); 1813 if (htab == NULL) 1814 return FALSE; 1815 1816 dynobj = htab->elf.dynobj; 1817 if (dynobj == NULL) 1818 abort (); 1819 1820 if (htab->elf.dynamic_sections_created) 1821 { 1822 /* Set the contents of the .interp section to the interpreter. */ 1823 if (bfd_link_executable (info) && !info->nointerp) 1824 { 1825 s = bfd_get_linker_section (dynobj, ".interp"); 1826 if (s == NULL) 1827 abort (); 1828 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 1829 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 1830 } 1831 } 1832 1833 if (htab->elf.sgot && s390_gotplt_after_got_p (info)) 1834 { 1835 /* _bfd_elf_create_got_section adds the got header size always 1836 to .got.plt but we need it in .got if this section comes 1837 first. */ 1838 htab->elf.sgot->size += 3 * GOT_ENTRY_SIZE; 1839 htab->elf.sgotplt->size -= 3 * GOT_ENTRY_SIZE; 1840 1841 /* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got 1842 instead of .got.plt. */ 1843 htab->elf.hgot->root.u.def.section = htab->elf.sgot; 1844 htab->elf.hgot->root.u.def.value = 0; 1845 } 1846 1847 /* Set up .got offsets for local syms, and space for local dynamic 1848 relocs. */ 1849 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 1850 { 1851 bfd_signed_vma *local_got; 1852 bfd_signed_vma *end_local_got; 1853 char *local_tls_type; 1854 bfd_size_type locsymcount; 1855 Elf_Internal_Shdr *symtab_hdr; 1856 asection *srela; 1857 struct plt_entry *local_plt; 1858 unsigned int i; 1859 1860 if (! is_s390_elf (ibfd)) 1861 continue; 1862 1863 for (s = ibfd->sections; s != NULL; s = s->next) 1864 { 1865 struct elf_dyn_relocs *p; 1866 1867 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) 1868 { 1869 if (!bfd_is_abs_section (p->sec) 1870 && bfd_is_abs_section (p->sec->output_section)) 1871 { 1872 /* Input section has been discarded, either because 1873 it is a copy of a linkonce section or due to 1874 linker script /DISCARD/, so we'll be discarding 1875 the relocs too. */ 1876 } 1877 else if (p->count != 0) 1878 { 1879 srela = elf_section_data (p->sec)->sreloc; 1880 srela->size += p->count * sizeof (Elf64_External_Rela); 1881 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 1882 info->flags |= DF_TEXTREL; 1883 } 1884 } 1885 } 1886 1887 local_got = elf_local_got_refcounts (ibfd); 1888 if (!local_got) 1889 continue; 1890 1891 symtab_hdr = &elf_symtab_hdr (ibfd); 1892 locsymcount = symtab_hdr->sh_info; 1893 end_local_got = local_got + locsymcount; 1894 local_tls_type = elf_s390_local_got_tls_type (ibfd); 1895 s = htab->elf.sgot; 1896 srela = htab->elf.srelgot; 1897 for (; local_got < end_local_got; ++local_got, ++local_tls_type) 1898 { 1899 if (*local_got > 0) 1900 { 1901 *local_got = s->size; 1902 s->size += GOT_ENTRY_SIZE; 1903 if (*local_tls_type == GOT_TLS_GD) 1904 s->size += GOT_ENTRY_SIZE; 1905 if (bfd_link_pic (info)) 1906 srela->size += sizeof (Elf64_External_Rela); 1907 } 1908 else 1909 *local_got = (bfd_vma) -1; 1910 } 1911 1912 local_plt = elf_s390_local_plt (ibfd); 1913 for (i = 0; i < symtab_hdr->sh_info; i++) 1914 { 1915 if (local_plt[i].plt.refcount > 0) 1916 { 1917 local_plt[i].plt.offset = htab->elf.iplt->size; 1918 htab->elf.iplt->size += PLT_ENTRY_SIZE; 1919 htab->elf.igotplt->size += GOT_ENTRY_SIZE; 1920 htab->elf.irelplt->size += sizeof (Elf64_External_Rela); 1921 } 1922 else 1923 local_plt[i].plt.offset = (bfd_vma) -1; 1924 } 1925 } 1926 1927 if (htab->tls_ldm_got.refcount > 0) 1928 { 1929 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64 1930 relocs. */ 1931 htab->tls_ldm_got.offset = htab->elf.sgot->size; 1932 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; 1933 htab->elf.srelgot->size += sizeof (Elf64_External_Rela); 1934 } 1935 else 1936 htab->tls_ldm_got.offset = -1; 1937 1938 /* Allocate global sym .plt and .got entries, and space for global 1939 sym dynamic relocs. */ 1940 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); 1941 1942 /* We now have determined the sizes of the various dynamic sections. 1943 Allocate memory for them. */ 1944 relocs = FALSE; 1945 for (s = dynobj->sections; s != NULL; s = s->next) 1946 { 1947 if ((s->flags & SEC_LINKER_CREATED) == 0) 1948 continue; 1949 1950 if (s == htab->elf.splt 1951 || s == htab->elf.sgot 1952 || s == htab->elf.sgotplt 1953 || s == htab->elf.sdynbss 1954 || s == htab->elf.sdynrelro 1955 || s == htab->elf.iplt 1956 || s == htab->elf.igotplt 1957 || s == htab->irelifunc) 1958 { 1959 /* Strip this section if we don't need it; see the 1960 comment below. */ 1961 } 1962 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) 1963 { 1964 if (s->size != 0 && s != htab->elf.srelplt) 1965 relocs = TRUE; 1966 1967 /* We use the reloc_count field as a counter if we need 1968 to copy relocs into the output file. */ 1969 s->reloc_count = 0; 1970 } 1971 else 1972 { 1973 /* It's not one of our sections, so don't allocate space. */ 1974 continue; 1975 } 1976 1977 if (s->size == 0) 1978 { 1979 /* If we don't need this section, strip it from the 1980 output file. This is to handle .rela.bss and 1981 .rela.plt. We must create it in 1982 create_dynamic_sections, because it must be created 1983 before the linker maps input sections to output 1984 sections. The linker does that before 1985 adjust_dynamic_symbol is called, and it is that 1986 function which decides whether anything needs to go 1987 into these sections. */ 1988 1989 s->flags |= SEC_EXCLUDE; 1990 continue; 1991 } 1992 1993 if ((s->flags & SEC_HAS_CONTENTS) == 0) 1994 continue; 1995 1996 /* Allocate memory for the section contents. We use bfd_zalloc 1997 here in case unused entries are not reclaimed before the 1998 section's contents are written out. This should not happen, 1999 but this way if it does, we get a R_390_NONE reloc instead 2000 of garbage. */ 2001 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 2002 if (s->contents == NULL) 2003 return FALSE; 2004 } 2005 2006 if (htab->elf.dynamic_sections_created) 2007 { 2008 /* Add some entries to the .dynamic section. We fill in the 2009 values later, in elf_s390_finish_dynamic_sections, but we 2010 must add the entries now so that we get the correct size for 2011 the .dynamic section. The DT_DEBUG entry is filled in by the 2012 dynamic linker and used by the debugger. */ 2013 #define add_dynamic_entry(TAG, VAL) \ 2014 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2015 2016 if (bfd_link_executable (info)) 2017 { 2018 if (!add_dynamic_entry (DT_DEBUG, 0)) 2019 return FALSE; 2020 } 2021 2022 if (htab->elf.splt->size != 0) 2023 { 2024 if (!add_dynamic_entry (DT_PLTGOT, 0) 2025 || !add_dynamic_entry (DT_PLTRELSZ, 0) 2026 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 2027 || !add_dynamic_entry (DT_JMPREL, 0)) 2028 return FALSE; 2029 } 2030 2031 if (relocs) 2032 { 2033 if (!add_dynamic_entry (DT_RELA, 0) 2034 || !add_dynamic_entry (DT_RELASZ, 0) 2035 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) 2036 return FALSE; 2037 2038 /* If any dynamic relocs apply to a read-only section, 2039 then we need a DT_TEXTREL entry. */ 2040 if ((info->flags & DF_TEXTREL) == 0) 2041 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info); 2042 2043 if ((info->flags & DF_TEXTREL) != 0) 2044 { 2045 if (!add_dynamic_entry (DT_TEXTREL, 0)) 2046 return FALSE; 2047 } 2048 } 2049 } 2050 #undef add_dynamic_entry 2051 2052 return TRUE; 2053 } 2054 2055 /* Return the base VMA address which should be subtracted from real addresses 2056 when resolving @dtpoff relocation. 2057 This is PT_TLS segment p_vaddr. */ 2058 2059 static bfd_vma 2060 dtpoff_base (struct bfd_link_info *info) 2061 { 2062 /* If tls_sec is NULL, we should have signalled an error already. */ 2063 if (elf_hash_table (info)->tls_sec == NULL) 2064 return 0; 2065 return elf_hash_table (info)->tls_sec->vma; 2066 } 2067 2068 /* Return the relocation value for @tpoff relocation 2069 if STT_TLS virtual address is ADDRESS. */ 2070 2071 static bfd_vma 2072 tpoff (struct bfd_link_info *info, bfd_vma address) 2073 { 2074 struct elf_link_hash_table *htab = elf_hash_table (info); 2075 2076 /* If tls_sec is NULL, we should have signalled an error already. */ 2077 if (htab->tls_sec == NULL) 2078 return 0; 2079 return htab->tls_size + htab->tls_sec->vma - address; 2080 } 2081 2082 /* Complain if TLS instruction relocation is against an invalid 2083 instruction. */ 2084 2085 static void 2086 invalid_tls_insn (bfd *input_bfd, 2087 asection *input_section, 2088 Elf_Internal_Rela *rel) 2089 { 2090 reloc_howto_type *howto; 2091 2092 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info); 2093 _bfd_error_handler 2094 /* xgettext:c-format */ 2095 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"), 2096 input_bfd, 2097 input_section, 2098 (uint64_t) rel->r_offset, 2099 howto->name); 2100 bfd_set_error (bfd_error_bad_value); 2101 } 2102 2103 /* Relocate a 390 ELF section. */ 2104 2105 static bfd_boolean 2106 elf_s390_relocate_section (bfd *output_bfd, 2107 struct bfd_link_info *info, 2108 bfd *input_bfd, 2109 asection *input_section, 2110 bfd_byte *contents, 2111 Elf_Internal_Rela *relocs, 2112 Elf_Internal_Sym *local_syms, 2113 asection **local_sections) 2114 { 2115 struct elf_s390_link_hash_table *htab; 2116 Elf_Internal_Shdr *symtab_hdr; 2117 struct elf_link_hash_entry **sym_hashes; 2118 bfd_vma *local_got_offsets; 2119 Elf_Internal_Rela *rel; 2120 Elf_Internal_Rela *relend; 2121 2122 if (!is_s390_elf (input_bfd)) 2123 { 2124 bfd_set_error (bfd_error_wrong_format); 2125 return FALSE; 2126 } 2127 2128 htab = elf_s390_hash_table (info); 2129 if (htab == NULL) 2130 return FALSE; 2131 2132 symtab_hdr = &elf_symtab_hdr (input_bfd); 2133 sym_hashes = elf_sym_hashes (input_bfd); 2134 local_got_offsets = elf_local_got_offsets (input_bfd); 2135 2136 rel = relocs; 2137 relend = relocs + input_section->reloc_count; 2138 for (; rel < relend; rel++) 2139 { 2140 unsigned int r_type; 2141 reloc_howto_type *howto; 2142 unsigned long r_symndx; 2143 struct elf_link_hash_entry *h; 2144 Elf_Internal_Sym *sym; 2145 asection *sec; 2146 bfd_vma off; 2147 bfd_vma relocation; 2148 bfd_boolean unresolved_reloc; 2149 bfd_reloc_status_type r; 2150 int tls_type; 2151 bfd_boolean resolved_to_zero; 2152 2153 r_type = ELF64_R_TYPE (rel->r_info); 2154 if (r_type == (int) R_390_GNU_VTINHERIT 2155 || r_type == (int) R_390_GNU_VTENTRY) 2156 continue; 2157 if (r_type >= (int) R_390_max) 2158 { 2159 bfd_set_error (bfd_error_bad_value); 2160 return FALSE; 2161 } 2162 2163 howto = elf_howto_table + r_type; 2164 r_symndx = ELF64_R_SYM (rel->r_info); 2165 2166 h = NULL; 2167 sym = NULL; 2168 sec = NULL; 2169 unresolved_reloc = FALSE; 2170 if (r_symndx < symtab_hdr->sh_info) 2171 { 2172 sym = local_syms + r_symndx; 2173 sec = local_sections[r_symndx]; 2174 2175 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 2176 { 2177 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd); 2178 if (local_plt == NULL) 2179 return FALSE; 2180 2181 /* Address of the PLT slot. */ 2182 relocation = (htab->elf.iplt->output_section->vma 2183 + htab->elf.iplt->output_offset 2184 + local_plt[r_symndx].plt.offset); 2185 2186 switch (r_type) 2187 { 2188 case R_390_PLTOFF16: 2189 case R_390_PLTOFF32: 2190 case R_390_PLTOFF64: 2191 relocation -= s390_got_pointer (info); 2192 break; 2193 case R_390_GOTPLT12: 2194 case R_390_GOTPLT16: 2195 case R_390_GOTPLT20: 2196 case R_390_GOTPLT32: 2197 case R_390_GOTPLT64: 2198 case R_390_GOTPLTENT: 2199 case R_390_GOT12: 2200 case R_390_GOT16: 2201 case R_390_GOT20: 2202 case R_390_GOT32: 2203 case R_390_GOT64: 2204 case R_390_GOTENT: 2205 { 2206 /* Write the PLT slot address into the GOT slot. */ 2207 bfd_put_64 (output_bfd, relocation, 2208 htab->elf.sgot->contents + 2209 local_got_offsets[r_symndx]); 2210 relocation = (local_got_offsets[r_symndx] + 2211 s390_got_offset (info)); 2212 2213 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) 2214 relocation += s390_got_pointer (info); 2215 break; 2216 } 2217 default: 2218 break; 2219 } 2220 /* The output section is needed later in 2221 finish_dynamic_section when creating the dynamic 2222 relocation. */ 2223 local_plt[r_symndx].sec = sec; 2224 goto do_relocation; 2225 } 2226 else 2227 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2228 } 2229 else 2230 { 2231 bfd_boolean warned ATTRIBUTE_UNUSED; 2232 bfd_boolean ignored ATTRIBUTE_UNUSED; 2233 2234 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 2235 r_symndx, symtab_hdr, sym_hashes, 2236 h, sec, relocation, 2237 unresolved_reloc, warned, ignored); 2238 } 2239 2240 if (sec != NULL && discarded_section (sec)) 2241 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2242 rel, 1, relend, howto, 0, contents); 2243 2244 if (bfd_link_relocatable (info)) 2245 continue; 2246 2247 resolved_to_zero = (h != NULL 2248 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); 2249 2250 switch (r_type) 2251 { 2252 case R_390_GOTPLT12: 2253 case R_390_GOTPLT16: 2254 case R_390_GOTPLT20: 2255 case R_390_GOTPLT32: 2256 case R_390_GOTPLT64: 2257 case R_390_GOTPLTENT: 2258 /* There are three cases for a GOTPLT relocation. 1) The 2259 relocation is against the jump slot entry of a plt that 2260 will get emitted to the output file. 2) The relocation 2261 is against the jump slot of a plt entry that has been 2262 removed. elf_s390_adjust_gotplt has created a GOT entry 2263 as replacement. 3) The relocation is against a local symbol. 2264 Cases 2) and 3) are the same as the GOT relocation code 2265 so we just have to test for case 1 and fall through for 2266 the other two. */ 2267 if (h != NULL && h->plt.offset != (bfd_vma) -1) 2268 { 2269 bfd_vma plt_index; 2270 2271 if (s390_is_ifunc_symbol_p (h)) 2272 { 2273 /* Entry indices of .iplt and .igot.plt match 2274 1:1. No magic PLT first entry here. */ 2275 plt_index = h->plt.offset / PLT_ENTRY_SIZE; 2276 relocation = (plt_index * GOT_ENTRY_SIZE 2277 + s390_gotplt_offset (info) 2278 + htab->elf.igotplt->output_offset); 2279 } 2280 else 2281 { 2282 plt_index = ((h->plt.offset - PLT_FIRST_ENTRY_SIZE) 2283 / PLT_ENTRY_SIZE); 2284 2285 relocation = (plt_index * GOT_ENTRY_SIZE 2286 + s390_gotplt_offset (info)); 2287 } 2288 if (r_type == R_390_GOTPLTENT) 2289 relocation += s390_got_pointer (info); 2290 unresolved_reloc = FALSE; 2291 break; 2292 } 2293 /* Fall through. */ 2294 2295 case R_390_GOT12: 2296 case R_390_GOT16: 2297 case R_390_GOT20: 2298 case R_390_GOT32: 2299 case R_390_GOT64: 2300 case R_390_GOTENT: 2301 /* Relocation is to the entry for this symbol in the global 2302 offset table. */ 2303 if (htab->elf.sgot == NULL) 2304 abort (); 2305 2306 if (h != NULL) 2307 { 2308 bfd_boolean dyn; 2309 2310 off = h->got.offset; 2311 dyn = htab->elf.dynamic_sections_created; 2312 2313 if (s390_is_ifunc_symbol_p (h)) 2314 { 2315 BFD_ASSERT (h->plt.offset != (bfd_vma) -1); 2316 if (off == (bfd_vma)-1) 2317 { 2318 /* No explicit GOT usage so redirect to the 2319 got.iplt slot. */ 2320 relocation = (s390_gotplt_offset (info) 2321 + htab->elf.igotplt->output_offset 2322 + (h->plt.offset / PLT_ENTRY_SIZE 2323 * GOT_ENTRY_SIZE)); 2324 2325 /* For @GOTENT the relocation is against the offset between 2326 the instruction and the symbols entry in the GOT and not 2327 between the start of the GOT and the symbols entry. We 2328 add the vma of the GOT to get the correct value. */ 2329 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) 2330 relocation += s390_got_pointer (info); 2331 2332 break; 2333 } 2334 else 2335 { 2336 /* Explicit GOT slots must contain the address 2337 of the PLT slot. This will be handled in 2338 finish_dynamic_symbol. */ 2339 } 2340 } 2341 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 2342 bfd_link_pic (info), 2343 h) 2344 || (bfd_link_pic (info) 2345 && SYMBOL_REFERENCES_LOCAL (info, h)) 2346 || resolved_to_zero) 2347 { 2348 Elf_Internal_Sym *isym; 2349 asection *sym_sec; 2350 2351 /* This is actually a static link, or it is a 2352 -Bsymbolic link and the symbol is defined 2353 locally, or the symbol was forced to be local 2354 because of a version file. We must initialize 2355 this entry in the global offset table. Since the 2356 offset must always be a multiple of 2, we use the 2357 least significant bit to record whether we have 2358 initialized it already. 2359 2360 When doing a dynamic link, we create a .rel.got 2361 relocation entry to initialize the value. This 2362 is done in the finish_dynamic_symbol routine. */ 2363 if ((off & 1) != 0) 2364 off &= ~1; 2365 else 2366 { 2367 bfd_put_64 (output_bfd, relocation, 2368 htab->elf.sgot->contents + off); 2369 h->got.offset |= 1; 2370 } 2371 2372 /* When turning a GOT slot dereference into a direct 2373 reference using larl we have to make sure that 2374 the symbol is 1. properly aligned and 2. it is no 2375 ABS symbol or will become one. */ 2376 if ((h->def_regular 2377 && bfd_link_pic (info) 2378 && SYMBOL_REFERENCES_LOCAL (info, h)) 2379 /* lgrl rx,sym@GOTENT -> larl rx, sym */ 2380 && ((r_type == R_390_GOTENT 2381 && (bfd_get_16 (input_bfd, 2382 contents + rel->r_offset - 2) 2383 & 0xff0f) == 0xc408) 2384 /* lg rx, sym@GOT(r12) -> larl rx, sym */ 2385 || (r_type == R_390_GOT20 2386 && (bfd_get_32 (input_bfd, 2387 contents + rel->r_offset - 2) 2388 & 0xff00f000) == 0xe300c000 2389 && bfd_get_8 (input_bfd, 2390 contents + rel->r_offset + 3) == 0x04)) 2391 && (isym = bfd_sym_from_r_symndx (&htab->sym_cache, 2392 input_bfd, r_symndx)) 2393 && isym->st_shndx != SHN_ABS 2394 && h != htab->elf.hdynamic 2395 && h != htab->elf.hgot 2396 && h != htab->elf.hplt 2397 && !(isym->st_value & 1) 2398 && (sym_sec = bfd_section_from_elf_index (input_bfd, 2399 isym->st_shndx)) 2400 && sym_sec->alignment_power) 2401 { 2402 unsigned short new_insn = 2403 (0xc000 | (bfd_get_8 (input_bfd, 2404 contents + rel->r_offset - 1) & 0xf0)); 2405 bfd_put_16 (output_bfd, new_insn, 2406 contents + rel->r_offset - 2); 2407 r_type = R_390_PC32DBL; 2408 rel->r_addend = 2; 2409 howto = elf_howto_table + r_type; 2410 relocation = h->root.u.def.value 2411 + h->root.u.def.section->output_section->vma 2412 + h->root.u.def.section->output_offset; 2413 goto do_relocation; 2414 } 2415 } 2416 else 2417 unresolved_reloc = FALSE; 2418 } 2419 else 2420 { 2421 if (local_got_offsets == NULL) 2422 abort (); 2423 2424 off = local_got_offsets[r_symndx]; 2425 2426 /* The offset must always be a multiple of 8. We use 2427 the least significant bit to record whether we have 2428 already generated the necessary reloc. */ 2429 if ((off & 1) != 0) 2430 off &= ~1; 2431 else 2432 { 2433 bfd_put_64 (output_bfd, relocation, 2434 htab->elf.sgot->contents + off); 2435 2436 if (bfd_link_pic (info)) 2437 { 2438 asection *s; 2439 Elf_Internal_Rela outrel; 2440 bfd_byte *loc; 2441 2442 s = htab->elf.srelgot; 2443 if (s == NULL) 2444 abort (); 2445 2446 outrel.r_offset = (htab->elf.sgot->output_section->vma 2447 + htab->elf.sgot->output_offset 2448 + off); 2449 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 2450 outrel.r_addend = relocation; 2451 loc = s->contents; 2452 loc += s->reloc_count++ * sizeof (Elf64_External_Rela); 2453 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2454 } 2455 2456 local_got_offsets[r_symndx] |= 1; 2457 } 2458 } 2459 2460 if (off >= (bfd_vma) -2) 2461 abort (); 2462 2463 relocation = s390_got_offset (info) + off; 2464 2465 /* For @GOTENT the relocation is against the offset between 2466 the instruction and the symbols entry in the GOT and not 2467 between the start of the GOT and the symbols entry. We 2468 add the vma of the GOT to get the correct value. */ 2469 if ( r_type == R_390_GOTENT 2470 || r_type == R_390_GOTPLTENT) 2471 relocation += s390_got_pointer (info); 2472 2473 break; 2474 2475 case R_390_GOTOFF16: 2476 case R_390_GOTOFF32: 2477 case R_390_GOTOFF64: 2478 /* Relocation is relative to the start of the global offset 2479 table. */ 2480 2481 if (h != NULL 2482 && s390_is_ifunc_symbol_p (h) 2483 && h->def_regular 2484 && !bfd_link_executable (info)) 2485 { 2486 relocation = (htab->elf.iplt->output_section->vma 2487 + htab->elf.iplt->output_offset 2488 + h->plt.offset 2489 - s390_got_pointer (info)); 2490 goto do_relocation; 2491 } 2492 2493 relocation -= s390_got_pointer (info); 2494 break; 2495 2496 case R_390_GOTPC: 2497 case R_390_GOTPCDBL: 2498 /* Use global offset table as symbol value. */ 2499 relocation = s390_got_pointer (info); 2500 unresolved_reloc = FALSE; 2501 break; 2502 2503 case R_390_PLT12DBL: 2504 case R_390_PLT16DBL: 2505 case R_390_PLT24DBL: 2506 case R_390_PLT32: 2507 case R_390_PLT32DBL: 2508 case R_390_PLT64: 2509 /* Relocation is to the entry for this symbol in the 2510 procedure linkage table. */ 2511 2512 /* Resolve a PLT32 reloc against a local symbol directly, 2513 without using the procedure linkage table. */ 2514 if (h == NULL) 2515 break; 2516 2517 if (h->plt.offset == (bfd_vma) -1 2518 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) 2519 { 2520 /* We didn't make a PLT entry for this symbol. This 2521 happens when statically linking PIC code, or when 2522 using -Bsymbolic. */ 2523 break; 2524 } 2525 if (s390_is_ifunc_symbol_p (h)) 2526 relocation = (htab->elf.iplt->output_section->vma 2527 + htab->elf.iplt->output_offset 2528 + h->plt.offset); 2529 else 2530 relocation = (htab->elf.splt->output_section->vma 2531 + htab->elf.splt->output_offset 2532 + h->plt.offset); 2533 unresolved_reloc = FALSE; 2534 break; 2535 2536 case R_390_PLTOFF16: 2537 case R_390_PLTOFF32: 2538 case R_390_PLTOFF64: 2539 /* Relocation is to the entry for this symbol in the 2540 procedure linkage table relative to the start of the GOT. */ 2541 2542 /* For local symbols or if we didn't make a PLT entry for 2543 this symbol resolve the symbol directly. */ 2544 if (h == NULL 2545 || h->plt.offset == (bfd_vma) -1 2546 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) 2547 { 2548 relocation -= s390_got_pointer (info); 2549 break; 2550 } 2551 2552 if (s390_is_ifunc_symbol_p (h)) 2553 relocation = (htab->elf.iplt->output_section->vma 2554 + htab->elf.iplt->output_offset 2555 + h->plt.offset 2556 - s390_got_pointer (info)); 2557 else 2558 relocation = (htab->elf.splt->output_section->vma 2559 + htab->elf.splt->output_offset 2560 + h->plt.offset 2561 - s390_got_pointer (info)); 2562 unresolved_reloc = FALSE; 2563 break; 2564 2565 case R_390_PC16: 2566 case R_390_PC12DBL: 2567 case R_390_PC16DBL: 2568 case R_390_PC24DBL: 2569 case R_390_PC32: 2570 case R_390_PC32DBL: 2571 case R_390_PC64: 2572 if (h != NULL 2573 && bfd_link_pie (info) 2574 && !h->def_regular) 2575 { 2576 _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined " 2577 "in shared library and accessed " 2578 "from executable " 2579 "(rebuild file with -fPIC ?)"), 2580 input_bfd, h->root.root.string); 2581 bfd_set_error (bfd_error_bad_value); 2582 return FALSE; 2583 } 2584 /* The target of these relocs are instruction operands 2585 residing in read-only sections. We cannot emit a runtime 2586 reloc for it. */ 2587 if (h != NULL 2588 && s390_is_ifunc_symbol_p (h) 2589 && h->def_regular 2590 && bfd_link_pic (info)) 2591 { 2592 relocation = (htab->elf.iplt->output_section->vma 2593 + htab->elf.iplt->output_offset 2594 + h->plt.offset); 2595 goto do_relocation; 2596 } 2597 /* Fall through. */ 2598 2599 case R_390_8: 2600 case R_390_16: 2601 case R_390_32: 2602 case R_390_64: 2603 2604 if ((input_section->flags & SEC_ALLOC) == 0) 2605 break; 2606 2607 if (h != NULL 2608 && s390_is_ifunc_symbol_p (h) 2609 && h->def_regular) 2610 { 2611 if (!bfd_link_pic (info)) 2612 { 2613 /* For a non-shared object the symbol will not 2614 change. Hence we can write the address of the 2615 target IPLT slot now. */ 2616 relocation = (htab->elf.iplt->output_section->vma 2617 + htab->elf.iplt->output_offset 2618 + h ->plt.offset); 2619 goto do_relocation; 2620 } 2621 else 2622 { 2623 /* For shared objects a runtime relocation is needed. */ 2624 2625 Elf_Internal_Rela outrel; 2626 asection *sreloc; 2627 2628 /* Need a dynamic relocation to get the real function 2629 address. */ 2630 outrel.r_offset = _bfd_elf_section_offset (output_bfd, 2631 info, 2632 input_section, 2633 rel->r_offset); 2634 if (outrel.r_offset == (bfd_vma) -1 2635 || outrel.r_offset == (bfd_vma) -2) 2636 abort (); 2637 2638 outrel.r_offset += (input_section->output_section->vma 2639 + input_section->output_offset); 2640 2641 if (h->dynindx == -1 2642 || h->forced_local 2643 || bfd_link_executable (info)) 2644 { 2645 /* This symbol is resolved locally. */ 2646 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE); 2647 outrel.r_addend = (h->root.u.def.value 2648 + h->root.u.def.section->output_section->vma 2649 + h->root.u.def.section->output_offset); 2650 } 2651 else 2652 { 2653 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); 2654 outrel.r_addend = 0; 2655 } 2656 2657 sreloc = htab->elf.irelifunc; 2658 elf_append_rela (output_bfd, sreloc, &outrel); 2659 2660 /* If this reloc is against an external symbol, we 2661 do not want to fiddle with the addend. Otherwise, 2662 we need to include the symbol value so that it 2663 becomes an addend for the dynamic reloc. For an 2664 internal symbol, we have updated addend. */ 2665 continue; 2666 } 2667 } 2668 2669 if ((bfd_link_pic (info) 2670 && (h == NULL 2671 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 2672 && !resolved_to_zero) 2673 || h->root.type != bfd_link_hash_undefweak) 2674 && ((r_type != R_390_PC16 2675 && r_type != R_390_PC12DBL 2676 && r_type != R_390_PC16DBL 2677 && r_type != R_390_PC24DBL 2678 && r_type != R_390_PC32 2679 && r_type != R_390_PC32DBL 2680 && r_type != R_390_PC64) 2681 || !SYMBOL_CALLS_LOCAL (info, h))) 2682 || (ELIMINATE_COPY_RELOCS 2683 && !bfd_link_pic (info) 2684 && h != NULL 2685 && h->dynindx != -1 2686 && !h->non_got_ref 2687 && ((h->def_dynamic 2688 && !h->def_regular) 2689 || h->root.type == bfd_link_hash_undefweak 2690 || h->root.type == bfd_link_hash_undefined))) 2691 { 2692 Elf_Internal_Rela outrel; 2693 bfd_boolean skip, relocate; 2694 asection *sreloc; 2695 bfd_byte *loc; 2696 2697 /* When generating a shared object, these relocations 2698 are copied into the output file to be resolved at run 2699 time. */ 2700 skip = FALSE; 2701 relocate = FALSE; 2702 2703 outrel.r_offset = 2704 _bfd_elf_section_offset (output_bfd, info, input_section, 2705 rel->r_offset); 2706 if (outrel.r_offset == (bfd_vma) -1) 2707 skip = TRUE; 2708 else if (outrel.r_offset == (bfd_vma) -2) 2709 skip = TRUE, relocate = TRUE; 2710 2711 outrel.r_offset += (input_section->output_section->vma 2712 + input_section->output_offset); 2713 2714 if (skip) 2715 memset (&outrel, 0, sizeof outrel); 2716 else if (h != NULL 2717 && h->dynindx != -1 2718 && (r_type == R_390_PC16 2719 || r_type == R_390_PC12DBL 2720 || r_type == R_390_PC16DBL 2721 || r_type == R_390_PC24DBL 2722 || r_type == R_390_PC32 2723 || r_type == R_390_PC32DBL 2724 || r_type == R_390_PC64 2725 || !bfd_link_pic (info) 2726 || !SYMBOLIC_BIND (info, h) 2727 || !h->def_regular)) 2728 { 2729 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); 2730 outrel.r_addend = rel->r_addend; 2731 } 2732 else 2733 { 2734 /* This symbol is local, or marked to become local. */ 2735 outrel.r_addend = relocation + rel->r_addend; 2736 if (r_type == R_390_64) 2737 { 2738 relocate = TRUE; 2739 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 2740 } 2741 else 2742 { 2743 long sindx; 2744 2745 if (bfd_is_abs_section (sec)) 2746 sindx = 0; 2747 else if (sec == NULL || sec->owner == NULL) 2748 { 2749 bfd_set_error(bfd_error_bad_value); 2750 return FALSE; 2751 } 2752 else 2753 { 2754 asection *osec; 2755 2756 osec = sec->output_section; 2757 sindx = elf_section_data (osec)->dynindx; 2758 2759 if (sindx == 0) 2760 { 2761 osec = htab->elf.text_index_section; 2762 sindx = elf_section_data (osec)->dynindx; 2763 } 2764 BFD_ASSERT (sindx != 0); 2765 2766 /* We are turning this relocation into one 2767 against a section symbol, so subtract out 2768 the output section's address but not the 2769 offset of the input section in the output 2770 section. */ 2771 outrel.r_addend -= osec->vma; 2772 } 2773 outrel.r_info = ELF64_R_INFO (sindx, r_type); 2774 } 2775 } 2776 2777 sreloc = elf_section_data (input_section)->sreloc; 2778 if (sreloc == NULL) 2779 abort (); 2780 2781 loc = sreloc->contents; 2782 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 2783 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2784 2785 /* If this reloc is against an external symbol, we do 2786 not want to fiddle with the addend. Otherwise, we 2787 need to include the symbol value so that it becomes 2788 an addend for the dynamic reloc. */ 2789 if (! relocate) 2790 continue; 2791 } 2792 2793 break; 2794 2795 /* Relocations for tls literal pool entries. */ 2796 case R_390_TLS_IE64: 2797 if (bfd_link_pic (info)) 2798 { 2799 Elf_Internal_Rela outrel; 2800 asection *sreloc; 2801 bfd_byte *loc; 2802 2803 outrel.r_offset = rel->r_offset 2804 + input_section->output_section->vma 2805 + input_section->output_offset; 2806 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 2807 sreloc = elf_section_data (input_section)->sreloc; 2808 if (sreloc == NULL) 2809 abort (); 2810 loc = sreloc->contents; 2811 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 2812 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc); 2813 } 2814 /* Fall through. */ 2815 2816 case R_390_TLS_GD64: 2817 case R_390_TLS_GOTIE64: 2818 r_type = elf_s390_tls_transition (info, r_type, h == NULL); 2819 tls_type = GOT_UNKNOWN; 2820 if (h == NULL && local_got_offsets) 2821 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 2822 else if (h != NULL) 2823 { 2824 tls_type = elf_s390_hash_entry(h)->tls_type; 2825 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE) 2826 r_type = R_390_TLS_LE64; 2827 } 2828 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE) 2829 r_type = R_390_TLS_IE64; 2830 2831 if (r_type == R_390_TLS_LE64) 2832 { 2833 /* This relocation gets optimized away by the local exec 2834 access optimization. */ 2835 BFD_ASSERT (! unresolved_reloc); 2836 bfd_put_64 (output_bfd, -tpoff (info, relocation), 2837 contents + rel->r_offset); 2838 continue; 2839 } 2840 2841 if (htab->elf.sgot == NULL) 2842 abort (); 2843 2844 if (h != NULL) 2845 off = h->got.offset; 2846 else 2847 { 2848 if (local_got_offsets == NULL) 2849 abort (); 2850 2851 off = local_got_offsets[r_symndx]; 2852 } 2853 2854 emit_tls_relocs: 2855 2856 if ((off & 1) != 0) 2857 off &= ~1; 2858 else 2859 { 2860 Elf_Internal_Rela outrel; 2861 bfd_byte *loc; 2862 int dr_type, indx; 2863 2864 if (htab->elf.srelgot == NULL) 2865 abort (); 2866 2867 outrel.r_offset = (htab->elf.sgot->output_section->vma 2868 + htab->elf.sgot->output_offset + off); 2869 2870 indx = h && h->dynindx != -1 ? h->dynindx : 0; 2871 if (r_type == R_390_TLS_GD64) 2872 dr_type = R_390_TLS_DTPMOD; 2873 else 2874 dr_type = R_390_TLS_TPOFF; 2875 if (dr_type == R_390_TLS_TPOFF && indx == 0) 2876 outrel.r_addend = relocation - dtpoff_base (info); 2877 else 2878 outrel.r_addend = 0; 2879 outrel.r_info = ELF64_R_INFO (indx, dr_type); 2880 loc = htab->elf.srelgot->contents; 2881 loc += htab->elf.srelgot->reloc_count++ 2882 * sizeof (Elf64_External_Rela); 2883 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2884 2885 if (r_type == R_390_TLS_GD64) 2886 { 2887 if (indx == 0) 2888 { 2889 BFD_ASSERT (! unresolved_reloc); 2890 bfd_put_64 (output_bfd, 2891 relocation - dtpoff_base (info), 2892 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); 2893 } 2894 else 2895 { 2896 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF); 2897 outrel.r_offset += GOT_ENTRY_SIZE; 2898 outrel.r_addend = 0; 2899 htab->elf.srelgot->reloc_count++; 2900 loc += sizeof (Elf64_External_Rela); 2901 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2902 } 2903 } 2904 2905 if (h != NULL) 2906 h->got.offset |= 1; 2907 else 2908 local_got_offsets[r_symndx] |= 1; 2909 } 2910 2911 if (off >= (bfd_vma) -2) 2912 abort (); 2913 if (r_type == ELF64_R_TYPE (rel->r_info)) 2914 { 2915 relocation = htab->elf.sgot->output_offset + off; 2916 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT) 2917 relocation += htab->elf.sgot->output_section->vma; 2918 unresolved_reloc = FALSE; 2919 } 2920 else 2921 { 2922 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off, 2923 contents + rel->r_offset); 2924 continue; 2925 } 2926 break; 2927 2928 case R_390_TLS_GOTIE12: 2929 case R_390_TLS_GOTIE20: 2930 case R_390_TLS_IEENT: 2931 if (h == NULL) 2932 { 2933 if (local_got_offsets == NULL) 2934 abort(); 2935 off = local_got_offsets[r_symndx]; 2936 if (bfd_link_pic (info)) 2937 goto emit_tls_relocs; 2938 } 2939 else 2940 { 2941 off = h->got.offset; 2942 tls_type = elf_s390_hash_entry(h)->tls_type; 2943 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE) 2944 goto emit_tls_relocs; 2945 } 2946 2947 if (htab->elf.sgot == NULL) 2948 abort (); 2949 2950 BFD_ASSERT (! unresolved_reloc); 2951 bfd_put_64 (output_bfd, -tpoff (info, relocation), 2952 htab->elf.sgot->contents + off); 2953 relocation = htab->elf.sgot->output_offset + off; 2954 if (r_type == R_390_TLS_IEENT) 2955 relocation += htab->elf.sgot->output_section->vma; 2956 unresolved_reloc = FALSE; 2957 break; 2958 2959 case R_390_TLS_LDM64: 2960 if (! bfd_link_pic (info)) 2961 /* The literal pool entry this relocation refers to gets ignored 2962 by the optimized code of the local exec model. Do nothing 2963 and the value will turn out zero. */ 2964 continue; 2965 2966 if (htab->elf.sgot == NULL) 2967 abort (); 2968 2969 off = htab->tls_ldm_got.offset; 2970 if (off & 1) 2971 off &= ~1; 2972 else 2973 { 2974 Elf_Internal_Rela outrel; 2975 bfd_byte *loc; 2976 2977 if (htab->elf.srelgot == NULL) 2978 abort (); 2979 2980 outrel.r_offset = (htab->elf.sgot->output_section->vma 2981 + htab->elf.sgot->output_offset + off); 2982 2983 bfd_put_64 (output_bfd, 0, 2984 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); 2985 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD); 2986 outrel.r_addend = 0; 2987 loc = htab->elf.srelgot->contents; 2988 loc += htab->elf.srelgot->reloc_count++ 2989 * sizeof (Elf64_External_Rela); 2990 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2991 htab->tls_ldm_got.offset |= 1; 2992 } 2993 relocation = htab->elf.sgot->output_offset + off; 2994 unresolved_reloc = FALSE; 2995 break; 2996 2997 case R_390_TLS_LE64: 2998 if (bfd_link_dll (info)) 2999 { 3000 /* Linking a shared library with non-fpic code requires 3001 a R_390_TLS_TPOFF relocation. */ 3002 Elf_Internal_Rela outrel; 3003 asection *sreloc; 3004 bfd_byte *loc; 3005 int indx; 3006 3007 outrel.r_offset = rel->r_offset 3008 + input_section->output_section->vma 3009 + input_section->output_offset; 3010 if (h != NULL && h->dynindx != -1) 3011 indx = h->dynindx; 3012 else 3013 indx = 0; 3014 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF); 3015 if (indx == 0) 3016 outrel.r_addend = relocation - dtpoff_base (info); 3017 else 3018 outrel.r_addend = 0; 3019 sreloc = elf_section_data (input_section)->sreloc; 3020 if (sreloc == NULL) 3021 abort (); 3022 loc = sreloc->contents; 3023 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 3024 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 3025 } 3026 else 3027 { 3028 BFD_ASSERT (! unresolved_reloc); 3029 bfd_put_64 (output_bfd, -tpoff (info, relocation), 3030 contents + rel->r_offset); 3031 } 3032 continue; 3033 3034 case R_390_TLS_LDO64: 3035 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING)) 3036 relocation -= dtpoff_base (info); 3037 else 3038 /* When converting LDO to LE, we must negate. */ 3039 relocation = -tpoff (info, relocation); 3040 break; 3041 3042 /* Relocations for tls instructions. */ 3043 case R_390_TLS_LOAD: 3044 case R_390_TLS_GDCALL: 3045 case R_390_TLS_LDCALL: 3046 tls_type = GOT_UNKNOWN; 3047 if (h == NULL && local_got_offsets) 3048 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 3049 else if (h != NULL) 3050 tls_type = elf_s390_hash_entry(h)->tls_type; 3051 3052 if (tls_type == GOT_TLS_GD) 3053 continue; 3054 3055 if (r_type == R_390_TLS_LOAD) 3056 { 3057 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) 3058 { 3059 /* IE->LE transition. Four valid cases: 3060 lg %rx,(0,%ry) -> sllg %rx,%ry,0 3061 lg %rx,(%ry,0) -> sllg %rx,%ry,0 3062 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0 3063 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */ 3064 unsigned int insn0, insn1, ry; 3065 3066 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); 3067 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); 3068 if (insn1 != 0x0004) 3069 { 3070 invalid_tls_insn (input_bfd, input_section, rel); 3071 return FALSE; 3072 } 3073 if ((insn0 & 0xff00f000) == 0xe3000000) 3074 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */ 3075 ry = (insn0 & 0x000f0000); 3076 else if ((insn0 & 0xff0f0000) == 0xe3000000) 3077 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */ 3078 ry = (insn0 & 0x0000f000) << 4; 3079 else if ((insn0 & 0xff00f000) == 0xe300c000) 3080 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */ 3081 ry = (insn0 & 0x000f0000); 3082 else if ((insn0 & 0xff0f0000) == 0xe30c0000) 3083 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */ 3084 ry = (insn0 & 0x0000f000) << 4; 3085 else 3086 { 3087 invalid_tls_insn (input_bfd, input_section, rel); 3088 return FALSE; 3089 } 3090 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry; 3091 insn1 = 0x000d; 3092 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); 3093 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); 3094 } 3095 } 3096 else if (r_type == R_390_TLS_GDCALL) 3097 { 3098 unsigned int insn0, insn1; 3099 3100 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); 3101 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); 3102 if ((insn0 & 0xffff0000) != 0xc0e50000) 3103 { 3104 invalid_tls_insn (input_bfd, input_section, rel); 3105 return FALSE; 3106 } 3107 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) 3108 { 3109 /* GD->LE transition. 3110 brasl %r14,__tls_get_addr@plt -> brcl 0,. */ 3111 insn0 = 0xc0040000; 3112 insn1 = 0x0000; 3113 } 3114 else 3115 { 3116 /* GD->IE transition. 3117 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */ 3118 insn0 = 0xe322c000; 3119 insn1 = 0x0004; 3120 } 3121 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); 3122 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); 3123 } 3124 else if (r_type == R_390_TLS_LDCALL) 3125 { 3126 if (!bfd_link_pic (info)) 3127 { 3128 unsigned int insn0, insn1; 3129 3130 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); 3131 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); 3132 if ((insn0 & 0xffff0000) != 0xc0e50000) 3133 { 3134 invalid_tls_insn (input_bfd, input_section, rel); 3135 return FALSE; 3136 } 3137 /* LD->LE transition. 3138 brasl %r14,__tls_get_addr@plt -> brcl 0,. */ 3139 insn0 = 0xc0040000; 3140 insn1 = 0x0000; 3141 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); 3142 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); 3143 } 3144 } 3145 continue; 3146 3147 default: 3148 break; 3149 } 3150 3151 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections 3152 because such sections are not SEC_ALLOC and thus ld.so will 3153 not process them. */ 3154 if (unresolved_reloc 3155 && !((input_section->flags & SEC_DEBUGGING) != 0 3156 && h->def_dynamic) 3157 && _bfd_elf_section_offset (output_bfd, info, input_section, 3158 rel->r_offset) != (bfd_vma) -1) 3159 _bfd_error_handler 3160 /* xgettext:c-format */ 3161 (_("%pB(%pA+%#" PRIx64 "): " 3162 "unresolvable %s relocation against symbol `%s'"), 3163 input_bfd, 3164 input_section, 3165 (uint64_t) rel->r_offset, 3166 howto->name, 3167 h->root.root.string); 3168 3169 do_relocation: 3170 3171 /* When applying a 24 bit reloc we need to start one byte 3172 earlier. Otherwise the 32 bit get/put bfd operations might 3173 access a byte after the actual section. */ 3174 if (r_type == R_390_PC24DBL 3175 || r_type == R_390_PLT24DBL) 3176 rel->r_offset--; 3177 3178 if (r_type == R_390_20 3179 || r_type == R_390_GOT20 3180 || r_type == R_390_GOTPLT20 3181 || r_type == R_390_TLS_GOTIE20) 3182 { 3183 relocation += rel->r_addend; 3184 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; 3185 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3186 contents, rel->r_offset, 3187 relocation, 0); 3188 } 3189 else 3190 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3191 contents, rel->r_offset, 3192 relocation, rel->r_addend); 3193 3194 if (r != bfd_reloc_ok) 3195 { 3196 const char *name; 3197 3198 if (h != NULL) 3199 name = h->root.root.string; 3200 else 3201 { 3202 name = bfd_elf_string_from_elf_section (input_bfd, 3203 symtab_hdr->sh_link, 3204 sym->st_name); 3205 if (name == NULL) 3206 return FALSE; 3207 if (*name == '\0') 3208 name = bfd_section_name (input_bfd, sec); 3209 } 3210 3211 if (r == bfd_reloc_overflow) 3212 (*info->callbacks->reloc_overflow) 3213 (info, (h ? &h->root : NULL), name, howto->name, 3214 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 3215 else 3216 { 3217 _bfd_error_handler 3218 /* xgettext:c-format */ 3219 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"), 3220 input_bfd, input_section, 3221 (uint64_t) rel->r_offset, name, (int) r); 3222 return FALSE; 3223 } 3224 } 3225 } 3226 3227 return TRUE; 3228 } 3229 3230 /* Generate the PLT slots together with the dynamic relocations needed 3231 for IFUNC symbols. */ 3232 3233 static void 3234 elf_s390_finish_ifunc_symbol (bfd *output_bfd, 3235 struct bfd_link_info *info, 3236 struct elf_link_hash_entry *h, 3237 struct elf_s390_link_hash_table *htab, 3238 bfd_vma plt_offset, 3239 bfd_vma resolver_address) 3240 { 3241 bfd_vma plt_index; 3242 bfd_vma got_offset; 3243 Elf_Internal_Rela rela; 3244 bfd_byte *loc; 3245 asection *plt, *gotplt, *relplt; 3246 3247 if (htab->elf.iplt == NULL 3248 || htab->elf.igotplt == NULL 3249 || htab->elf.irelplt == NULL) 3250 abort (); 3251 3252 /* Index of the PLT slot within iplt section. */ 3253 plt_index = plt_offset / PLT_ENTRY_SIZE; 3254 plt = htab->elf.iplt; 3255 /* Offset into the igot.plt section. */ 3256 got_offset = plt_index * GOT_ENTRY_SIZE; 3257 gotplt = htab->elf.igotplt; 3258 relplt = htab->elf.irelplt; 3259 3260 /* Fill in the blueprint of a PLT. */ 3261 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry, 3262 PLT_ENTRY_SIZE); 3263 3264 /* Fixup the relative address to the GOT entry */ 3265 bfd_put_32 (output_bfd, 3266 (gotplt->output_section->vma + 3267 gotplt->output_offset + got_offset 3268 - (plt->output_section->vma + 3269 plt->output_offset + 3270 plt_offset))/2, 3271 plt->contents + plt_offset + 2); 3272 /* Fixup the relative branch to PLT 0 */ 3273 bfd_put_32 (output_bfd, - (plt->output_offset + 3274 (PLT_ENTRY_SIZE * plt_index) + 22)/2, 3275 plt->contents + plt_offset + 24); 3276 /* Fixup offset into .rela.plt section. */ 3277 bfd_put_32 (output_bfd, relplt->output_offset + 3278 plt_index * sizeof (Elf64_External_Rela), 3279 plt->contents + plt_offset + 28); 3280 3281 /* Fill in the entry in the global offset table. 3282 Points to instruction after GOT offset. */ 3283 bfd_put_64 (output_bfd, 3284 (plt->output_section->vma 3285 + plt->output_offset 3286 + plt_offset 3287 + 14), 3288 gotplt->contents + got_offset); 3289 3290 /* Fill in the entry in the .rela.plt section. */ 3291 rela.r_offset = (gotplt->output_section->vma 3292 + gotplt->output_offset 3293 + got_offset); 3294 3295 if (!h 3296 || h->dynindx == -1 3297 || ((bfd_link_executable (info) 3298 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 3299 && h->def_regular)) 3300 { 3301 /* The symbol can be locally resolved. */ 3302 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE); 3303 rela.r_addend = resolver_address; 3304 } 3305 else 3306 { 3307 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); 3308 rela.r_addend = 0; 3309 } 3310 3311 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela); 3312 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3313 } 3314 3315 3316 /* Finish up dynamic symbol handling. We set the contents of various 3317 dynamic sections here. */ 3318 3319 static bfd_boolean 3320 elf_s390_finish_dynamic_symbol (bfd *output_bfd, 3321 struct bfd_link_info *info, 3322 struct elf_link_hash_entry *h, 3323 Elf_Internal_Sym *sym) 3324 { 3325 struct elf_s390_link_hash_table *htab; 3326 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h; 3327 3328 htab = elf_s390_hash_table (info); 3329 if (htab == NULL) 3330 return FALSE; 3331 3332 if (h->plt.offset != (bfd_vma) -1) 3333 { 3334 bfd_vma plt_index; 3335 bfd_vma gotplt_offset; 3336 Elf_Internal_Rela rela; 3337 bfd_byte *loc; 3338 3339 /* This symbol has an entry in the procedure linkage table. Set 3340 it up. */ 3341 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 3342 { 3343 elf_s390_finish_ifunc_symbol (output_bfd, info, h, 3344 htab, h->plt.offset, 3345 eh->ifunc_resolver_address + 3346 eh->ifunc_resolver_section->output_offset + 3347 eh->ifunc_resolver_section->output_section->vma); 3348 3349 /* Do not return yet. Handling of explicit GOT slots of 3350 IFUNC symbols is below. */ 3351 } 3352 else 3353 { 3354 if (h->dynindx == -1 3355 || htab->elf.splt == NULL 3356 || htab->elf.sgotplt == NULL 3357 || htab->elf.srelplt == NULL) 3358 abort (); 3359 3360 /* Calc. index no. 3361 Current offset - size first entry / entry size. */ 3362 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; 3363 3364 /* The slots in the .got.plt correspond to the PLT slots in 3365 the same order. */ 3366 gotplt_offset = plt_index * GOT_ENTRY_SIZE; 3367 3368 /* If .got.plt comes first it needs to contain the 3 header 3369 entries. */ 3370 if (!s390_gotplt_after_got_p (info)) 3371 gotplt_offset += 3 * GOT_ENTRY_SIZE; 3372 3373 /* Fill in the blueprint of a PLT. */ 3374 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry, 3375 PLT_ENTRY_SIZE); 3376 3377 /* The first instruction in the PLT entry is a LARL loading 3378 the address of the GOT slot. We write the 4 byte 3379 immediate operand of the LARL instruction here. */ 3380 bfd_put_32 (output_bfd, 3381 (htab->elf.sgotplt->output_section->vma + 3382 htab->elf.sgotplt->output_offset + gotplt_offset 3383 - (htab->elf.splt->output_section->vma + 3384 htab->elf.splt->output_offset + 3385 h->plt.offset))/2, 3386 htab->elf.splt->contents + h->plt.offset + 2); 3387 /* Fixup the relative branch to PLT 0 */ 3388 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE + 3389 (PLT_ENTRY_SIZE * plt_index) + 22)/2, 3390 htab->elf.splt->contents + h->plt.offset + 24); 3391 /* Fixup offset into .rela.plt section. */ 3392 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela), 3393 htab->elf.splt->contents + h->plt.offset + 28); 3394 3395 /* Fill in the entry in the global offset table. 3396 Points to instruction after GOT offset. */ 3397 bfd_put_64 (output_bfd, 3398 (htab->elf.splt->output_section->vma 3399 + htab->elf.splt->output_offset 3400 + h->plt.offset 3401 + 14), 3402 htab->elf.sgotplt->contents + gotplt_offset); 3403 3404 /* Fill in the entry in the .rela.plt section. */ 3405 rela.r_offset = (htab->elf.sgotplt->output_section->vma 3406 + htab->elf.sgotplt->output_offset 3407 + gotplt_offset); 3408 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); 3409 rela.r_addend = 0; 3410 loc = htab->elf.srelplt->contents + plt_index * 3411 sizeof (Elf64_External_Rela); 3412 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3413 3414 if (!h->def_regular) 3415 { 3416 /* Mark the symbol as undefined, rather than as defined in 3417 the .plt section. Leave the value alone. This is a clue 3418 for the dynamic linker, to make function pointer 3419 comparisons work between an application and shared 3420 library. */ 3421 sym->st_shndx = SHN_UNDEF; 3422 } 3423 } 3424 } 3425 3426 if (h->got.offset != (bfd_vma) -1 3427 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD 3428 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE 3429 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) 3430 { 3431 Elf_Internal_Rela rela; 3432 bfd_byte *loc; 3433 3434 /* This symbol has an entry in the global offset table. Set it 3435 up. */ 3436 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) 3437 abort (); 3438 3439 rela.r_offset = (htab->elf.sgot->output_section->vma 3440 + htab->elf.sgot->output_offset 3441 + (h->got.offset &~ (bfd_vma) 1)); 3442 3443 if (h->def_regular && s390_is_ifunc_symbol_p (h)) 3444 { 3445 if (bfd_link_pic (info)) 3446 { 3447 /* An explicit GOT slot usage needs GLOB_DAT. If the 3448 symbol references local the implicit got.iplt slot 3449 will be used and the IRELATIVE reloc has been created 3450 above. */ 3451 goto do_glob_dat; 3452 } 3453 else 3454 { 3455 /* For non-shared objects explicit GOT slots must be 3456 filled with the PLT slot address for pointer 3457 equality reasons. */ 3458 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma 3459 + htab->elf.iplt->output_offset 3460 + h->plt.offset), 3461 htab->elf.sgot->contents + h->got.offset); 3462 return TRUE; 3463 } 3464 } 3465 else if (bfd_link_pic (info) 3466 && SYMBOL_REFERENCES_LOCAL (info, h)) 3467 { 3468 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) 3469 return TRUE; 3470 3471 /* If this is a static link, or it is a -Bsymbolic link and 3472 the symbol is defined locally or was forced to be local 3473 because of a version file, we just want to emit a 3474 RELATIVE reloc. The entry in the global offset table 3475 will already have been initialized in the 3476 relocate_section function. */ 3477 if (!(h->def_regular || ELF_COMMON_DEF_P (h))) 3478 return FALSE; 3479 BFD_ASSERT((h->got.offset & 1) != 0); 3480 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 3481 rela.r_addend = (h->root.u.def.value 3482 + h->root.u.def.section->output_section->vma 3483 + h->root.u.def.section->output_offset); 3484 } 3485 else 3486 { 3487 BFD_ASSERT((h->got.offset & 1) == 0); 3488 do_glob_dat: 3489 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset); 3490 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT); 3491 rela.r_addend = 0; 3492 } 3493 3494 loc = htab->elf.srelgot->contents; 3495 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela); 3496 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3497 } 3498 3499 if (h->needs_copy) 3500 { 3501 Elf_Internal_Rela rela; 3502 asection *s; 3503 bfd_byte *loc; 3504 3505 /* This symbols needs a copy reloc. Set it up. */ 3506 3507 if (h->dynindx == -1 3508 || (h->root.type != bfd_link_hash_defined 3509 && h->root.type != bfd_link_hash_defweak) 3510 || htab->elf.srelbss == NULL) 3511 abort (); 3512 3513 rela.r_offset = (h->root.u.def.value 3514 + h->root.u.def.section->output_section->vma 3515 + h->root.u.def.section->output_offset); 3516 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY); 3517 rela.r_addend = 0; 3518 if (h->root.u.def.section == htab->elf.sdynrelro) 3519 s = htab->elf.sreldynrelro; 3520 else 3521 s = htab->elf.srelbss; 3522 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela); 3523 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3524 } 3525 3526 /* Mark some specially defined symbols as absolute. */ 3527 if (h == htab->elf.hdynamic 3528 || h == htab->elf.hgot 3529 || h == htab->elf.hplt) 3530 sym->st_shndx = SHN_ABS; 3531 3532 return TRUE; 3533 } 3534 3535 /* Used to decide how to sort relocs in an optimal manner for the 3536 dynamic linker, before writing them out. */ 3537 3538 static enum elf_reloc_type_class 3539 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 3540 const asection *rel_sec ATTRIBUTE_UNUSED, 3541 const Elf_Internal_Rela *rela) 3542 { 3543 bfd *abfd = info->output_bfd; 3544 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 3545 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info); 3546 unsigned long r_symndx = ELF64_R_SYM (rela->r_info); 3547 Elf_Internal_Sym sym; 3548 3549 if (htab->elf.dynsym == NULL 3550 || !bed->s->swap_symbol_in (abfd, 3551 (htab->elf.dynsym->contents 3552 + r_symndx * bed->s->sizeof_sym), 3553 0, &sym)) 3554 abort (); 3555 3556 /* Check relocation against STT_GNU_IFUNC symbol. */ 3557 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) 3558 return reloc_class_ifunc; 3559 3560 switch ((int) ELF64_R_TYPE (rela->r_info)) 3561 { 3562 case R_390_RELATIVE: 3563 return reloc_class_relative; 3564 case R_390_JMP_SLOT: 3565 return reloc_class_plt; 3566 case R_390_COPY: 3567 return reloc_class_copy; 3568 default: 3569 return reloc_class_normal; 3570 } 3571 } 3572 3573 /* Finish up the dynamic sections. */ 3574 3575 static bfd_boolean 3576 elf_s390_finish_dynamic_sections (bfd *output_bfd, 3577 struct bfd_link_info *info) 3578 { 3579 struct elf_s390_link_hash_table *htab; 3580 bfd *dynobj; 3581 asection *sdyn; 3582 bfd *ibfd; 3583 unsigned int i; 3584 3585 htab = elf_s390_hash_table (info); 3586 if (htab == NULL) 3587 return FALSE; 3588 3589 dynobj = htab->elf.dynobj; 3590 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 3591 3592 if (htab->elf.dynamic_sections_created) 3593 { 3594 Elf64_External_Dyn *dyncon, *dynconend; 3595 3596 if (sdyn == NULL || htab->elf.sgot == NULL) 3597 abort (); 3598 3599 dyncon = (Elf64_External_Dyn *) sdyn->contents; 3600 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); 3601 for (; dyncon < dynconend; dyncon++) 3602 { 3603 Elf_Internal_Dyn dyn; 3604 asection *s; 3605 3606 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); 3607 3608 switch (dyn.d_tag) 3609 { 3610 default: 3611 continue; 3612 3613 case DT_PLTGOT: 3614 /* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */ 3615 dyn.d_un.d_ptr = s390_got_pointer (info); 3616 break; 3617 3618 case DT_JMPREL: 3619 s = htab->elf.srelplt; 3620 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 3621 break; 3622 3623 case DT_PLTRELSZ: 3624 dyn.d_un.d_val = htab->elf.srelplt->size; 3625 if (htab->elf.irelplt) 3626 dyn.d_un.d_val += htab->elf.irelplt->size; 3627 break; 3628 3629 case DT_RELASZ: 3630 /* The procedure linkage table relocs (DT_JMPREL) should 3631 not be included in the overall relocs (DT_RELA). 3632 Therefore, we override the DT_RELASZ entry here to 3633 make it not include the JMPREL relocs. Since the 3634 linker script arranges for .rela.plt to follow all 3635 other relocation sections, we don't have to worry 3636 about changing the DT_RELA entry. */ 3637 dyn.d_un.d_val -= htab->elf.srelplt->size; 3638 if (htab->elf.irelplt) 3639 dyn.d_un.d_val -= htab->elf.irelplt->size; 3640 break; 3641 } 3642 3643 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); 3644 } 3645 3646 /* Fill in the special first entry in the procedure linkage table. */ 3647 if (htab->elf.splt && htab->elf.splt->size > 0) 3648 { 3649 /* fill in blueprint for plt 0 entry */ 3650 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry, 3651 PLT_FIRST_ENTRY_SIZE); 3652 /* The second instruction in the first PLT entry is a LARL 3653 loading the GOT pointer. Fill in the LARL immediate 3654 address. */ 3655 bfd_put_32 (output_bfd, 3656 (s390_got_pointer (info) 3657 - htab->elf.splt->output_section->vma 3658 - htab->elf.splt->output_offset - 6)/2, 3659 htab->elf.splt->contents + 8); 3660 } 3661 if (elf_section_data (htab->elf.splt->output_section) != NULL) 3662 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize 3663 = PLT_ENTRY_SIZE; 3664 } 3665 3666 if (htab->elf.hgot && htab->elf.hgot->root.u.def.section) 3667 { 3668 /* Fill in the first three entries in the global offset table. */ 3669 if (htab->elf.hgot->root.u.def.section->size > 0) 3670 { 3671 bfd_put_64 (output_bfd, 3672 (sdyn == NULL ? (bfd_vma) 0 3673 : sdyn->output_section->vma + sdyn->output_offset), 3674 htab->elf.hgot->root.u.def.section->contents); 3675 /* One entry for shared object struct ptr. */ 3676 bfd_put_64 (output_bfd, (bfd_vma) 0, 3677 htab->elf.hgot->root.u.def.section->contents + 8); 3678 /* One entry for _dl_runtime_resolve. */ 3679 bfd_put_64 (output_bfd, (bfd_vma) 0, 3680 htab->elf.hgot->root.u.def.section->contents + 16); 3681 } 3682 elf_section_data (htab->elf.sgot->output_section) 3683 ->this_hdr.sh_entsize = 8; 3684 } 3685 3686 /* Finish dynamic symbol for local IFUNC symbols. */ 3687 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 3688 { 3689 struct plt_entry *local_plt; 3690 Elf_Internal_Sym *isym; 3691 Elf_Internal_Shdr *symtab_hdr; 3692 3693 symtab_hdr = &elf_symtab_hdr (ibfd); 3694 3695 if (!is_s390_elf (ibfd)) 3696 continue; 3697 3698 local_plt = elf_s390_local_plt (ibfd); 3699 if (local_plt != NULL) 3700 for (i = 0; i < symtab_hdr->sh_info; i++) 3701 { 3702 if (local_plt[i].plt.offset != (bfd_vma) -1) 3703 { 3704 asection *sec = local_plt[i].sec; 3705 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i); 3706 if (isym == NULL) 3707 return FALSE; 3708 3709 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 3710 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab, 3711 local_plt[i].plt.offset, 3712 isym->st_value 3713 + sec->output_section->vma 3714 + sec->output_offset); 3715 3716 } 3717 } 3718 } 3719 3720 return TRUE; 3721 } 3722 3723 /* Support for core dump NOTE sections. */ 3725 3726 static bfd_boolean 3727 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 3728 { 3729 int offset; 3730 size_t size; 3731 3732 switch (note->descsz) 3733 { 3734 default: 3735 return FALSE; 3736 3737 case 336: /* sizeof(struct elf_prstatus) on s390x */ 3738 /* pr_cursig */ 3739 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 3740 3741 /* pr_pid */ 3742 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32); 3743 3744 /* pr_reg */ 3745 offset = 112; 3746 size = 216; 3747 break; 3748 } 3749 3750 /* Make a ".reg/999" section. */ 3751 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 3752 size, note->descpos + offset); 3753 } 3754 3755 static bfd_boolean 3756 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 3757 { 3758 switch (note->descsz) 3759 { 3760 default: 3761 return FALSE; 3762 3763 case 136: /* sizeof(struct elf_prpsinfo) on s390x */ 3764 elf_tdata (abfd)->core->pid 3765 = bfd_get_32 (abfd, note->descdata + 24); 3766 elf_tdata (abfd)->core->program 3767 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); 3768 elf_tdata (abfd)->core->command 3769 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); 3770 } 3771 3772 /* Note that for some reason, a spurious space is tacked 3773 onto the end of the args in some (at least one anyway) 3774 implementations, so strip it off if it exists. */ 3775 3776 { 3777 char *command = elf_tdata (abfd)->core->command; 3778 int n = strlen (command); 3779 3780 if (0 < n && command[n - 1] == ' ') 3781 command[n - 1] = '\0'; 3782 } 3783 3784 return TRUE; 3785 } 3786 3787 static char * 3788 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz, 3789 int note_type, ...) 3790 { 3791 va_list ap; 3792 3793 switch (note_type) 3794 { 3795 default: 3796 return NULL; 3797 3798 case NT_PRPSINFO: 3799 { 3800 char data[136] ATTRIBUTE_NONSTRING = { 0 }; 3801 const char *fname, *psargs; 3802 3803 va_start (ap, note_type); 3804 fname = va_arg (ap, const char *); 3805 psargs = va_arg (ap, const char *); 3806 va_end (ap); 3807 3808 strncpy (data + 40, fname, 16); 3809 #if GCC_VERSION == 8000 || GCC_VERSION == 8001 3810 DIAGNOSTIC_PUSH; 3811 /* GCC 8.0 and 8.1 warn about 80 equals destination size with 3812 -Wstringop-truncation: 3813 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643 3814 */ 3815 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION; 3816 #endif 3817 strncpy (data + 56, psargs, 80); 3818 #if GCC_VERSION == 8000 || GCC_VERSION == 8001 3819 DIAGNOSTIC_POP; 3820 #endif 3821 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, 3822 &data, sizeof (data)); 3823 } 3824 3825 case NT_PRSTATUS: 3826 { 3827 char data[336] = { 0 }; 3828 long pid; 3829 int cursig; 3830 const void *gregs; 3831 3832 va_start (ap, note_type); 3833 pid = va_arg (ap, long); 3834 cursig = va_arg (ap, int); 3835 gregs = va_arg (ap, const void *); 3836 va_end (ap); 3837 3838 bfd_put_16 (abfd, cursig, data + 12); 3839 bfd_put_32 (abfd, pid, data + 32); 3840 memcpy (data + 112, gregs, 216); 3841 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, 3842 &data, sizeof (data)); 3843 } 3844 } 3845 /* NOTREACHED */ 3846 } 3847 3848 /* Return address for Ith PLT stub in section PLT, for relocation REL 3850 or (bfd_vma) -1 if it should not be included. */ 3851 3852 static bfd_vma 3853 elf_s390_plt_sym_val (bfd_vma i, const asection *plt, 3854 const arelent *rel ATTRIBUTE_UNUSED) 3855 { 3856 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; 3857 } 3858 3859 /* Merge backend specific data from an object file to the output 3860 object file when linking. */ 3861 3862 static bfd_boolean 3863 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 3864 { 3865 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd)) 3866 return TRUE; 3867 3868 return elf_s390_merge_obj_attributes (ibfd, info); 3869 } 3870 3871 /* We may add a PT_S390_PGSTE program header. */ 3872 3873 static int 3874 elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED, 3875 struct bfd_link_info *info) 3876 { 3877 struct elf_s390_link_hash_table *htab; 3878 3879 if (info) 3880 { 3881 htab = elf_s390_hash_table (info); 3882 if (htab) 3883 return htab->params->pgste; 3884 } 3885 return 0; 3886 } 3887 3888 3889 /* Add the PT_S390_PGSTE program header. */ 3890 3891 static bfd_boolean 3892 elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info) 3893 { 3894 struct elf_s390_link_hash_table *htab; 3895 struct elf_segment_map *m, *pm = NULL; 3896 3897 if (!abfd || !info) 3898 return TRUE; 3899 3900 htab = elf_s390_hash_table (info); 3901 if (!htab || !htab->params->pgste) 3902 return TRUE; 3903 3904 /* If there is already a PT_S390_PGSTE header, avoid adding 3905 another. */ 3906 m = elf_seg_map (abfd); 3907 while (m && m->p_type != PT_S390_PGSTE) 3908 { 3909 pm = m; 3910 m = m->next; 3911 } 3912 3913 if (m) 3914 return TRUE; 3915 3916 m = (struct elf_segment_map *) 3917 bfd_zalloc (abfd, sizeof (struct elf_segment_map)); 3918 if (m == NULL) 3919 return FALSE; 3920 m->p_type = PT_S390_PGSTE; 3921 m->count = 0; 3922 m->next = NULL; 3923 if (pm) 3924 pm->next = m; 3925 3926 return TRUE; 3927 } 3928 3929 bfd_boolean 3930 bfd_elf_s390_set_options (struct bfd_link_info *info, 3931 struct s390_elf_params *params) 3932 { 3933 struct elf_s390_link_hash_table *htab; 3934 3935 if (info) 3936 { 3937 htab = elf_s390_hash_table (info); 3938 if (htab) 3939 htab->params = params; 3940 } 3941 3942 return TRUE; 3943 } 3944 3945 3946 /* Why was the hash table entry size definition changed from 3947 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and 3948 this is the only reason for the s390_elf64_size_info structure. */ 3949 3950 const struct elf_size_info s390_elf64_size_info = 3951 { 3952 sizeof (Elf64_External_Ehdr), 3953 sizeof (Elf64_External_Phdr), 3954 sizeof (Elf64_External_Shdr), 3955 sizeof (Elf64_External_Rel), 3956 sizeof (Elf64_External_Rela), 3957 sizeof (Elf64_External_Sym), 3958 sizeof (Elf64_External_Dyn), 3959 sizeof (Elf_External_Note), 3960 8, /* hash-table entry size. */ 3961 1, /* internal relocations per external relocations. */ 3962 64, /* arch_size. */ 3963 3, /* log_file_align. */ 3964 ELFCLASS64, EV_CURRENT, 3965 bfd_elf64_write_out_phdrs, 3966 bfd_elf64_write_shdrs_and_ehdr, 3967 bfd_elf64_checksum_contents, 3968 bfd_elf64_write_relocs, 3969 bfd_elf64_swap_symbol_in, 3970 bfd_elf64_swap_symbol_out, 3971 bfd_elf64_slurp_reloc_table, 3972 bfd_elf64_slurp_symbol_table, 3973 bfd_elf64_swap_dyn_in, 3974 bfd_elf64_swap_dyn_out, 3975 bfd_elf64_swap_reloc_in, 3976 bfd_elf64_swap_reloc_out, 3977 bfd_elf64_swap_reloca_in, 3978 bfd_elf64_swap_reloca_out 3979 }; 3980 3981 #define TARGET_BIG_SYM s390_elf64_vec 3982 #define TARGET_BIG_NAME "elf64-s390" 3983 #define ELF_ARCH bfd_arch_s390 3984 #define ELF_TARGET_ID S390_ELF_DATA 3985 #define ELF_MACHINE_CODE EM_S390 3986 #define ELF_MACHINE_ALT1 EM_S390_OLD 3987 #define ELF_MAXPAGESIZE 0x1000 3988 3989 #define elf_backend_size_info s390_elf64_size_info 3990 3991 #define elf_backend_can_gc_sections 1 3992 #define elf_backend_can_refcount 1 3993 #define elf_backend_want_got_plt 1 3994 #define elf_backend_plt_readonly 1 3995 #define elf_backend_want_plt_sym 0 3996 #define elf_backend_got_header_size 24 3997 #define elf_backend_want_dynrelro 1 3998 #define elf_backend_rela_normal 1 3999 4000 #define elf_info_to_howto elf_s390_info_to_howto 4001 4002 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name 4003 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create 4004 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup 4005 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup 4006 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data 4007 4008 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol 4009 #define elf_backend_check_relocs elf_s390_check_relocs 4010 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol 4011 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections 4012 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections 4013 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol 4014 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook 4015 #define elf_backend_reloc_type_class elf_s390_reloc_type_class 4016 #define elf_backend_relocate_section elf_s390_relocate_section 4017 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections 4018 #define elf_backend_init_index_section _bfd_elf_init_1_index_section 4019 #define elf_backend_grok_prstatus elf_s390_grok_prstatus 4020 #define elf_backend_grok_psinfo elf_s390_grok_psinfo 4021 #define elf_backend_write_core_note elf_s390_write_core_note 4022 #define elf_backend_plt_sym_val elf_s390_plt_sym_val 4023 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p 4024 #define elf_backend_additional_program_headers elf_s390_additional_program_headers 4025 #define elf_backend_modify_segment_map elf_s390_modify_segment_map 4026 4027 #define bfd_elf64_mkobject elf_s390_mkobject 4028 #define elf_backend_object_p elf_s390_object_p 4029 4030 #include "elf64-target.h" 4031
Indexes created Mon Apr 27 00:23:16 UTC 2026