elf64-s390.c revision 1.1
1 /* IBM S/390-specific support for 64-bit ELF 2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 3 2010, 2011, 2012 Free Software Foundation, Inc. 4 Contributed Martin Schwidefsky (schwidefsky (at) de.ibm.com). 5 6 This file is part of BFD, the Binary File Descriptor library. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 21 02110-1301, USA. */ 22 23 #include "sysdep.h" 24 #include "bfd.h" 25 #include "bfdlink.h" 26 #include "libbfd.h" 27 #include "elf-bfd.h" 28 #include "elf/s390.h" 29 30 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value 31 from smaller values. Start with zero, widen, *then* decrement. */ 32 #define MINUS_ONE (((bfd_vma)0) - 1) 33 34 static bfd_reloc_status_type 35 s390_tls_reloc (bfd *, arelent *, asymbol *, void *, 36 asection *, bfd *, char **); 37 static bfd_reloc_status_type 38 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *, 39 asection *, bfd *, char **); 40 41 /* The relocation "howto" table. */ 42 static reloc_howto_type elf_howto_table[] = 43 { 44 HOWTO (R_390_NONE, /* type */ 45 0, /* rightshift */ 46 0, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */ 47 0, /* bitsize */ 48 FALSE, /* pc_relative */ 49 0, /* bitpos */ 50 complain_overflow_dont, /* complain_on_overflow */ 51 bfd_elf_generic_reloc, /* special_function */ 52 "R_390_NONE", /* name */ 53 FALSE, /* partial_inplace */ 54 0, /* src_mask */ 55 0, /* dst_mask */ 56 FALSE), /* pcrel_offset */ 57 58 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 59 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), 60 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 61 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), 62 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 63 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), 64 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 65 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), 66 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 67 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), 68 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield, 69 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), 70 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 71 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), 72 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 73 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), 74 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 75 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE), 76 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 77 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE), 78 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 79 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE), 80 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, 81 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE), 82 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 83 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE), 84 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, 85 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE), 86 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 87 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), 88 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, 89 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), 90 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, 91 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), 92 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, 93 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), 94 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 95 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), 96 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 97 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), 98 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 99 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE), 100 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 101 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE), 102 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, 103 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE), 104 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 105 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE), 106 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, 107 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE), 108 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 109 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE), 110 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 111 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), 112 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 113 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE), 114 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 115 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), 116 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 117 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), 118 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 119 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), 120 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 121 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE), 122 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 123 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE), 124 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 125 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), 126 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 127 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), 128 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 129 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE), 130 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, 131 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), 132 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, 133 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), 134 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, 135 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), 136 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */ 137 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 138 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE), 139 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 140 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), 141 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */ 142 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 143 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE), 144 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */ 145 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 146 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE), 147 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */ 148 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 149 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE), 150 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 151 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE), 152 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */ 153 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 154 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE), 155 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */ 156 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 157 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE), 158 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 159 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE), 160 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 161 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE), 162 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 163 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE), 164 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 165 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE), 166 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 167 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE), 168 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 169 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE), 170 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 171 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE), 172 HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 173 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE), 174 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, 175 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE), 176 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, 177 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE), 178 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, 179 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE), 180 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, 181 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE), 182 }; 183 184 /* GNU extension to record C++ vtable hierarchy. */ 185 static reloc_howto_type elf64_s390_vtinherit_howto = 186 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); 187 static reloc_howto_type elf64_s390_vtentry_howto = 188 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); 189 190 static reloc_howto_type * 191 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 192 bfd_reloc_code_real_type code) 193 { 194 switch (code) 195 { 196 case BFD_RELOC_NONE: 197 return &elf_howto_table[(int) R_390_NONE]; 198 case BFD_RELOC_8: 199 return &elf_howto_table[(int) R_390_8]; 200 case BFD_RELOC_390_12: 201 return &elf_howto_table[(int) R_390_12]; 202 case BFD_RELOC_16: 203 return &elf_howto_table[(int) R_390_16]; 204 case BFD_RELOC_32: 205 return &elf_howto_table[(int) R_390_32]; 206 case BFD_RELOC_CTOR: 207 return &elf_howto_table[(int) R_390_32]; 208 case BFD_RELOC_32_PCREL: 209 return &elf_howto_table[(int) R_390_PC32]; 210 case BFD_RELOC_390_GOT12: 211 return &elf_howto_table[(int) R_390_GOT12]; 212 case BFD_RELOC_32_GOT_PCREL: 213 return &elf_howto_table[(int) R_390_GOT32]; 214 case BFD_RELOC_390_PLT32: 215 return &elf_howto_table[(int) R_390_PLT32]; 216 case BFD_RELOC_390_COPY: 217 return &elf_howto_table[(int) R_390_COPY]; 218 case BFD_RELOC_390_GLOB_DAT: 219 return &elf_howto_table[(int) R_390_GLOB_DAT]; 220 case BFD_RELOC_390_JMP_SLOT: 221 return &elf_howto_table[(int) R_390_JMP_SLOT]; 222 case BFD_RELOC_390_RELATIVE: 223 return &elf_howto_table[(int) R_390_RELATIVE]; 224 case BFD_RELOC_32_GOTOFF: 225 return &elf_howto_table[(int) R_390_GOTOFF32]; 226 case BFD_RELOC_390_GOTPC: 227 return &elf_howto_table[(int) R_390_GOTPC]; 228 case BFD_RELOC_390_GOT16: 229 return &elf_howto_table[(int) R_390_GOT16]; 230 case BFD_RELOC_16_PCREL: 231 return &elf_howto_table[(int) R_390_PC16]; 232 case BFD_RELOC_390_PC12DBL: 233 return &elf_howto_table[(int) R_390_PC12DBL]; 234 case BFD_RELOC_390_PLT12DBL: 235 return &elf_howto_table[(int) R_390_PLT12DBL]; 236 case BFD_RELOC_390_PC16DBL: 237 return &elf_howto_table[(int) R_390_PC16DBL]; 238 case BFD_RELOC_390_PLT16DBL: 239 return &elf_howto_table[(int) R_390_PLT16DBL]; 240 case BFD_RELOC_390_PC24DBL: 241 return &elf_howto_table[(int) R_390_PC24DBL]; 242 case BFD_RELOC_390_PLT24DBL: 243 return &elf_howto_table[(int) R_390_PLT24DBL]; 244 case BFD_RELOC_390_PC32DBL: 245 return &elf_howto_table[(int) R_390_PC32DBL]; 246 case BFD_RELOC_390_PLT32DBL: 247 return &elf_howto_table[(int) R_390_PLT32DBL]; 248 case BFD_RELOC_390_GOTPCDBL: 249 return &elf_howto_table[(int) R_390_GOTPCDBL]; 250 case BFD_RELOC_64: 251 return &elf_howto_table[(int) R_390_64]; 252 case BFD_RELOC_64_PCREL: 253 return &elf_howto_table[(int) R_390_PC64]; 254 case BFD_RELOC_390_GOT64: 255 return &elf_howto_table[(int) R_390_GOT64]; 256 case BFD_RELOC_390_PLT64: 257 return &elf_howto_table[(int) R_390_PLT64]; 258 case BFD_RELOC_390_GOTENT: 259 return &elf_howto_table[(int) R_390_GOTENT]; 260 case BFD_RELOC_16_GOTOFF: 261 return &elf_howto_table[(int) R_390_GOTOFF16]; 262 case BFD_RELOC_390_GOTOFF64: 263 return &elf_howto_table[(int) R_390_GOTOFF64]; 264 case BFD_RELOC_390_GOTPLT12: 265 return &elf_howto_table[(int) R_390_GOTPLT12]; 266 case BFD_RELOC_390_GOTPLT16: 267 return &elf_howto_table[(int) R_390_GOTPLT16]; 268 case BFD_RELOC_390_GOTPLT32: 269 return &elf_howto_table[(int) R_390_GOTPLT32]; 270 case BFD_RELOC_390_GOTPLT64: 271 return &elf_howto_table[(int) R_390_GOTPLT64]; 272 case BFD_RELOC_390_GOTPLTENT: 273 return &elf_howto_table[(int) R_390_GOTPLTENT]; 274 case BFD_RELOC_390_PLTOFF16: 275 return &elf_howto_table[(int) R_390_PLTOFF16]; 276 case BFD_RELOC_390_PLTOFF32: 277 return &elf_howto_table[(int) R_390_PLTOFF32]; 278 case BFD_RELOC_390_PLTOFF64: 279 return &elf_howto_table[(int) R_390_PLTOFF64]; 280 case BFD_RELOC_390_TLS_LOAD: 281 return &elf_howto_table[(int) R_390_TLS_LOAD]; 282 case BFD_RELOC_390_TLS_GDCALL: 283 return &elf_howto_table[(int) R_390_TLS_GDCALL]; 284 case BFD_RELOC_390_TLS_LDCALL: 285 return &elf_howto_table[(int) R_390_TLS_LDCALL]; 286 case BFD_RELOC_390_TLS_GD64: 287 return &elf_howto_table[(int) R_390_TLS_GD64]; 288 case BFD_RELOC_390_TLS_GOTIE12: 289 return &elf_howto_table[(int) R_390_TLS_GOTIE12]; 290 case BFD_RELOC_390_TLS_GOTIE64: 291 return &elf_howto_table[(int) R_390_TLS_GOTIE64]; 292 case BFD_RELOC_390_TLS_LDM64: 293 return &elf_howto_table[(int) R_390_TLS_LDM64]; 294 case BFD_RELOC_390_TLS_IE64: 295 return &elf_howto_table[(int) R_390_TLS_IE64]; 296 case BFD_RELOC_390_TLS_IEENT: 297 return &elf_howto_table[(int) R_390_TLS_IEENT]; 298 case BFD_RELOC_390_TLS_LE64: 299 return &elf_howto_table[(int) R_390_TLS_LE64]; 300 case BFD_RELOC_390_TLS_LDO64: 301 return &elf_howto_table[(int) R_390_TLS_LDO64]; 302 case BFD_RELOC_390_TLS_DTPMOD: 303 return &elf_howto_table[(int) R_390_TLS_DTPMOD]; 304 case BFD_RELOC_390_TLS_DTPOFF: 305 return &elf_howto_table[(int) R_390_TLS_DTPOFF]; 306 case BFD_RELOC_390_TLS_TPOFF: 307 return &elf_howto_table[(int) R_390_TLS_TPOFF]; 308 case BFD_RELOC_390_20: 309 return &elf_howto_table[(int) R_390_20]; 310 case BFD_RELOC_390_GOT20: 311 return &elf_howto_table[(int) R_390_GOT20]; 312 case BFD_RELOC_390_GOTPLT20: 313 return &elf_howto_table[(int) R_390_GOTPLT20]; 314 case BFD_RELOC_390_TLS_GOTIE20: 315 return &elf_howto_table[(int) R_390_TLS_GOTIE20]; 316 case BFD_RELOC_390_IRELATIVE: 317 return &elf_howto_table[(int) R_390_IRELATIVE]; 318 case BFD_RELOC_VTABLE_INHERIT: 319 return &elf64_s390_vtinherit_howto; 320 case BFD_RELOC_VTABLE_ENTRY: 321 return &elf64_s390_vtentry_howto; 322 default: 323 break; 324 } 325 return 0; 326 } 327 328 static reloc_howto_type * 329 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 330 const char *r_name) 331 { 332 unsigned int i; 333 334 for (i = 0; 335 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); 336 i++) 337 if (elf_howto_table[i].name != NULL 338 && strcasecmp (elf_howto_table[i].name, r_name) == 0) 339 return &elf_howto_table[i]; 340 341 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0) 342 return &elf64_s390_vtinherit_howto; 343 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0) 344 return &elf64_s390_vtentry_howto; 345 346 return NULL; 347 } 348 349 /* We need to use ELF64_R_TYPE so we have our own copy of this function, 350 and elf64-s390.c has its own copy. */ 351 352 static void 353 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 354 arelent *cache_ptr, 355 Elf_Internal_Rela *dst) 356 { 357 unsigned int r_type = ELF64_R_TYPE(dst->r_info); 358 switch (r_type) 359 { 360 case R_390_GNU_VTINHERIT: 361 cache_ptr->howto = &elf64_s390_vtinherit_howto; 362 break; 363 364 case R_390_GNU_VTENTRY: 365 cache_ptr->howto = &elf64_s390_vtentry_howto; 366 break; 367 368 default: 369 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0])) 370 { 371 (*_bfd_error_handler) (_("%B: invalid relocation type %d"), 372 abfd, (int) r_type); 373 r_type = R_390_NONE; 374 } 375 cache_ptr->howto = &elf_howto_table[r_type]; 376 } 377 } 378 379 /* A relocation function which doesn't do anything. */ 380 static bfd_reloc_status_type 381 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED, 382 arelent *reloc_entry, 383 asymbol *symbol ATTRIBUTE_UNUSED, 384 void * data ATTRIBUTE_UNUSED, 385 asection *input_section, 386 bfd *output_bfd, 387 char **error_message ATTRIBUTE_UNUSED) 388 { 389 if (output_bfd) 390 reloc_entry->address += input_section->output_offset; 391 return bfd_reloc_ok; 392 } 393 394 /* Handle the large displacement relocs. */ 395 static bfd_reloc_status_type 396 s390_elf_ldisp_reloc (bfd *abfd, 397 arelent *reloc_entry, 398 asymbol *symbol, 399 void * data, 400 asection *input_section, 401 bfd *output_bfd, 402 char **error_message ATTRIBUTE_UNUSED) 403 { 404 reloc_howto_type *howto = reloc_entry->howto; 405 bfd_vma relocation; 406 bfd_vma insn; 407 408 if (output_bfd != (bfd *) NULL 409 && (symbol->flags & BSF_SECTION_SYM) == 0 410 && (! howto->partial_inplace 411 || reloc_entry->addend == 0)) 412 { 413 reloc_entry->address += input_section->output_offset; 414 return bfd_reloc_ok; 415 } 416 if (output_bfd != NULL) 417 return bfd_reloc_continue; 418 419 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 420 return bfd_reloc_outofrange; 421 422 relocation = (symbol->value 423 + symbol->section->output_section->vma 424 + symbol->section->output_offset); 425 relocation += reloc_entry->addend; 426 if (howto->pc_relative) 427 { 428 relocation -= (input_section->output_section->vma 429 + input_section->output_offset); 430 relocation -= reloc_entry->address; 431 } 432 433 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); 434 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; 435 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); 436 437 if ((bfd_signed_vma) relocation < - 0x80000 438 || (bfd_signed_vma) relocation > 0x7ffff) 439 return bfd_reloc_overflow; 440 else 441 return bfd_reloc_ok; 442 } 443 444 static bfd_boolean 445 elf_s390_is_local_label_name (bfd *abfd, const char *name) 446 { 447 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) 448 return TRUE; 449 450 return _bfd_elf_is_local_label_name (abfd, name); 451 } 452 453 /* Functions for the 390 ELF linker. */ 454 455 /* The name of the dynamic interpreter. This is put in the .interp 456 section. */ 457 458 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1" 459 460 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 461 copying dynamic variables from a shared lib into an app's dynbss 462 section, and instead use a dynamic relocation to point into the 463 shared lib. */ 464 #define ELIMINATE_COPY_RELOCS 1 465 466 /* The size in bytes of the first entry in the procedure linkage table. */ 467 #define PLT_FIRST_ENTRY_SIZE 32 468 /* The size in bytes of an entry in the procedure linkage table. */ 469 #define PLT_ENTRY_SIZE 32 470 471 #define GOT_ENTRY_SIZE 8 472 473 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela) 474 475 /* The first three entries in a procedure linkage table are reserved, 476 and the initial contents are unimportant (we zero them out). 477 Subsequent entries look like this. See the SVR4 ABI 386 478 supplement to see how this works. */ 479 480 /* For the s390, simple addr offset can only be 0 - 4096. 481 To use the full 16777216 TB address space, several instructions 482 are needed to load an address in a register and execute 483 a branch( or just saving the address) 484 485 Furthermore, only r 0 and 1 are free to use!!! */ 486 487 /* The first 3 words in the GOT are then reserved. 488 Word 0 is the address of the dynamic table. 489 Word 1 is a pointer to a structure describing the object 490 Word 2 is used to point to the loader entry address. 491 492 The code for PLT entries looks like this: 493 494 The GOT holds the address in the PLT to be executed. 495 The loader then gets: 496 24(15) = Pointer to the structure describing the object. 497 28(15) = Offset in symbol table 498 The loader must then find the module where the function is 499 and insert the address in the GOT. 500 501 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1 502 LG 1,0(1) # 6 bytes Load address from GOT in r1 503 BCR 15,1 # 2 bytes Jump to address 504 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 505 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1 506 BRCL 15,-x # 6 bytes Jump to start of PLT 507 .long ? # 4 bytes offset into .rela.plt 508 509 Total = 32 bytes per PLT entry 510 Fixup at offset 2: relative address to GOT entry 511 Fixup at offset 22: relative branch to PLT0 512 Fixup at offset 28: 32 bit offset into .rela.plt 513 514 A 32 bit offset into the symbol table is enough. It allows for 515 .rela.plt sections up to a size of 2 gigabyte. A single dynamic 516 object (the main program, any shared library) is limited to 4GB in 517 size. Having a .rela.plt of 2GB would already make the .plt 518 section bigger than 8GB. */ 519 520 static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] = 521 { 522 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */ 523 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */ 524 0x07, 0xf1, /* br %r1 */ 525 0x0d, 0x10, /* basr %r1,%r0 */ 526 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */ 527 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */ 528 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */ 529 }; 530 531 /* The first PLT entry pushes the offset into the symbol table 532 from R1 onto the stack at 56(15) and the loader object info 533 at 48(15), loads the loader address in R1 and jumps to it. */ 534 535 /* The first entry in the PLT: 536 537 PLT0: 538 STG 1,56(15) # r1 contains the offset into the symbol table 539 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table 540 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack 541 LG 1,16(1) # get entry address of loader 542 BCR 15,1 # jump to loader 543 544 Fixup at offset 8: relative address to start of GOT. */ 545 546 static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] = 547 { 548 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */ 549 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */ 550 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */ 551 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */ 552 0x07, 0xf1, /* br %r1 */ 553 0x07, 0x00, /* nopr %r0 */ 554 0x07, 0x00, /* nopr %r0 */ 555 0x07, 0x00 /* nopr %r0 */ 556 }; 557 558 559 /* s390 ELF linker hash entry. */ 560 561 struct elf_s390_link_hash_entry 562 { 563 struct elf_link_hash_entry elf; 564 565 /* Track dynamic relocs copied for this symbol. */ 566 struct elf_dyn_relocs *dyn_relocs; 567 568 /* Number of GOTPLT references for a function. */ 569 bfd_signed_vma gotplt_refcount; 570 571 #define GOT_UNKNOWN 0 572 #define GOT_NORMAL 1 573 #define GOT_TLS_GD 2 574 #define GOT_TLS_IE 3 575 #define GOT_TLS_IE_NLT 3 576 unsigned char tls_type; 577 578 /* For pointer equality reasons we might need to change the symbol 579 type from STT_GNU_IFUNC to STT_FUNC together with its value and 580 section entry. So after alloc_dynrelocs only these values should 581 be used. In order to check whether a symbol is IFUNC use 582 s390_is_ifunc_symbol_p. */ 583 bfd_vma ifunc_resolver_address; 584 asection *ifunc_resolver_section; 585 }; 586 587 #define elf_s390_hash_entry(ent) \ 588 ((struct elf_s390_link_hash_entry *)(ent)) 589 590 /* This structure represents an entry in the local PLT list needed for 591 local IFUNC symbols. */ 592 struct plt_entry 593 { 594 /* The section of the local symbol. 595 Set in relocate_section and used in finish_dynamic_sections. */ 596 asection *sec; 597 598 union 599 { 600 bfd_signed_vma refcount; 601 bfd_vma offset; 602 } plt; 603 }; 604 605 /* NOTE: Keep this structure in sync with 606 the one declared in elf32-s390.c. */ 607 struct elf_s390_obj_tdata 608 { 609 struct elf_obj_tdata root; 610 611 /* A local PLT is needed for ifunc symbols. */ 612 struct plt_entry *local_plt; 613 614 /* TLS type for each local got entry. */ 615 char *local_got_tls_type; 616 }; 617 618 #define elf_s390_tdata(abfd) \ 619 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) 620 621 #define elf_s390_local_plt(abfd) \ 622 (elf_s390_tdata (abfd)->local_plt) 623 624 #define elf_s390_local_got_tls_type(abfd) \ 625 (elf_s390_tdata (abfd)->local_got_tls_type) 626 627 #define is_s390_elf(bfd) \ 628 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 629 && elf_tdata (bfd) != NULL \ 630 && elf_object_id (bfd) == S390_ELF_DATA) 631 632 static bfd_boolean 633 elf_s390_mkobject (bfd *abfd) 634 { 635 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata), 636 S390_ELF_DATA); 637 } 638 639 static bfd_boolean 640 elf_s390_object_p (bfd *abfd) 641 { 642 /* Set the right machine number for an s390 elf32 file. */ 643 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64); 644 } 645 646 /* s390 ELF linker hash table. */ 647 648 struct elf_s390_link_hash_table 649 { 650 struct elf_link_hash_table elf; 651 652 /* Short-cuts to get to dynamic linker sections. */ 653 asection *sdynbss; 654 asection *srelbss; 655 asection *irelifunc; 656 657 union { 658 bfd_signed_vma refcount; 659 bfd_vma offset; 660 } tls_ldm_got; 661 662 /* Small local sym cache. */ 663 struct sym_cache sym_cache; 664 }; 665 666 /* Get the s390 ELF linker hash table from a link_info structure. */ 667 668 #define elf_s390_hash_table(p) \ 669 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 670 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL) 671 672 #define ELF64 1 673 #include "elf-s390-common.c" 674 675 /* Create an entry in an s390 ELF linker hash table. */ 676 677 static struct bfd_hash_entry * 678 link_hash_newfunc (struct bfd_hash_entry *entry, 679 struct bfd_hash_table *table, 680 const char *string) 681 { 682 /* Allocate the structure if it has not already been allocated by a 683 subclass. */ 684 if (entry == NULL) 685 { 686 entry = bfd_hash_allocate (table, 687 sizeof (struct elf_s390_link_hash_entry)); 688 if (entry == NULL) 689 return entry; 690 } 691 692 /* Call the allocation method of the superclass. */ 693 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 694 if (entry != NULL) 695 { 696 struct elf_s390_link_hash_entry *eh; 697 698 eh = (struct elf_s390_link_hash_entry *) entry; 699 eh->dyn_relocs = NULL; 700 eh->gotplt_refcount = 0; 701 eh->tls_type = GOT_UNKNOWN; 702 eh->ifunc_resolver_address = 0; 703 eh->ifunc_resolver_section = NULL; 704 } 705 706 return entry; 707 } 708 709 /* Create an s390 ELF linker hash table. */ 710 711 static struct bfd_link_hash_table * 712 elf_s390_link_hash_table_create (bfd *abfd) 713 { 714 struct elf_s390_link_hash_table *ret; 715 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); 716 717 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt); 718 if (ret == NULL) 719 return NULL; 720 721 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, 722 sizeof (struct elf_s390_link_hash_entry), 723 S390_ELF_DATA)) 724 { 725 free (ret); 726 return NULL; 727 } 728 729 return &ret->elf.root; 730 } 731 732 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up 733 shortcuts to them in our hash table. */ 734 735 static bfd_boolean 736 create_got_section (bfd *dynobj, 737 struct bfd_link_info *info) 738 { 739 struct elf_s390_link_hash_table *htab; 740 741 if (! _bfd_elf_create_got_section (dynobj, info)) 742 return FALSE; 743 744 htab = elf_s390_hash_table (info); 745 if (htab == NULL) 746 return FALSE; 747 748 htab->elf.sgot = bfd_get_linker_section (dynobj, ".got"); 749 htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); 750 htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 751 if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot) 752 abort (); 753 return TRUE; 754 } 755 756 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and 757 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our 758 hash table. */ 759 760 static bfd_boolean 761 elf_s390_create_dynamic_sections (bfd *dynobj, 762 struct bfd_link_info *info) 763 { 764 struct elf_s390_link_hash_table *htab; 765 766 htab = elf_s390_hash_table (info); 767 if (htab == NULL) 768 return FALSE; 769 770 if (!htab->elf.sgot && !create_got_section (dynobj, info)) 771 return FALSE; 772 773 if (!_bfd_elf_create_dynamic_sections (dynobj, info)) 774 return FALSE; 775 776 htab->elf.splt = bfd_get_linker_section (dynobj, ".plt"); 777 htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt"); 778 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); 779 if (!info->shared) 780 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); 781 782 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss 783 || (!info->shared && !htab->srelbss)) 784 abort (); 785 786 return TRUE; 787 } 788 789 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 790 791 static void 792 elf_s390_copy_indirect_symbol (struct bfd_link_info *info, 793 struct elf_link_hash_entry *dir, 794 struct elf_link_hash_entry *ind) 795 { 796 struct elf_s390_link_hash_entry *edir, *eind; 797 798 edir = (struct elf_s390_link_hash_entry *) dir; 799 eind = (struct elf_s390_link_hash_entry *) ind; 800 801 if (eind->dyn_relocs != NULL) 802 { 803 if (edir->dyn_relocs != NULL) 804 { 805 struct elf_dyn_relocs **pp; 806 struct elf_dyn_relocs *p; 807 808 /* Add reloc counts against the indirect sym to the direct sym 809 list. Merge any entries against the same section. */ 810 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 811 { 812 struct elf_dyn_relocs *q; 813 814 for (q = edir->dyn_relocs; q != NULL; q = q->next) 815 if (q->sec == p->sec) 816 { 817 q->pc_count += p->pc_count; 818 q->count += p->count; 819 *pp = p->next; 820 break; 821 } 822 if (q == NULL) 823 pp = &p->next; 824 } 825 *pp = edir->dyn_relocs; 826 } 827 828 edir->dyn_relocs = eind->dyn_relocs; 829 eind->dyn_relocs = NULL; 830 } 831 832 if (ind->root.type == bfd_link_hash_indirect 833 && dir->got.refcount <= 0) 834 { 835 edir->tls_type = eind->tls_type; 836 eind->tls_type = GOT_UNKNOWN; 837 } 838 839 if (ELIMINATE_COPY_RELOCS 840 && ind->root.type != bfd_link_hash_indirect 841 && dir->dynamic_adjusted) 842 { 843 /* If called to transfer flags for a weakdef during processing 844 of elf_adjust_dynamic_symbol, don't copy non_got_ref. 845 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 846 dir->ref_dynamic |= ind->ref_dynamic; 847 dir->ref_regular |= ind->ref_regular; 848 dir->ref_regular_nonweak |= ind->ref_regular_nonweak; 849 dir->needs_plt |= ind->needs_plt; 850 } 851 else 852 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 853 } 854 855 static int 856 elf_s390_tls_transition (struct bfd_link_info *info, 857 int r_type, 858 int is_local) 859 { 860 if (info->shared) 861 return r_type; 862 863 switch (r_type) 864 { 865 case R_390_TLS_GD64: 866 case R_390_TLS_IE64: 867 if (is_local) 868 return R_390_TLS_LE64; 869 return R_390_TLS_IE64; 870 case R_390_TLS_GOTIE64: 871 if (is_local) 872 return R_390_TLS_LE64; 873 return R_390_TLS_GOTIE64; 874 case R_390_TLS_LDM64: 875 return R_390_TLS_LE64; 876 } 877 878 return r_type; 879 } 880 881 /* Look through the relocs for a section during the first phase, and 882 allocate space in the global offset table or procedure linkage 883 table. */ 884 885 static bfd_boolean 886 elf_s390_check_relocs (bfd *abfd, 887 struct bfd_link_info *info, 888 asection *sec, 889 const Elf_Internal_Rela *relocs) 890 { 891 struct elf_s390_link_hash_table *htab; 892 Elf_Internal_Shdr *symtab_hdr; 893 struct elf_link_hash_entry **sym_hashes; 894 const Elf_Internal_Rela *rel; 895 const Elf_Internal_Rela *rel_end; 896 asection *sreloc; 897 bfd_signed_vma *local_got_refcounts; 898 int tls_type, old_tls_type; 899 900 if (info->relocatable) 901 return TRUE; 902 903 BFD_ASSERT (is_s390_elf (abfd)); 904 905 htab = elf_s390_hash_table (info); 906 if (htab == NULL) 907 return FALSE; 908 909 symtab_hdr = &elf_symtab_hdr (abfd); 910 sym_hashes = elf_sym_hashes (abfd); 911 local_got_refcounts = elf_local_got_refcounts (abfd); 912 913 sreloc = NULL; 914 915 rel_end = relocs + sec->reloc_count; 916 for (rel = relocs; rel < rel_end; rel++) 917 { 918 unsigned int r_type; 919 unsigned long r_symndx; 920 struct elf_link_hash_entry *h; 921 Elf_Internal_Sym *isym; 922 923 r_symndx = ELF64_R_SYM (rel->r_info); 924 925 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) 926 { 927 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), 928 abfd, 929 r_symndx); 930 return FALSE; 931 } 932 933 if (r_symndx < symtab_hdr->sh_info) 934 { 935 /* A local symbol. */ 936 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 937 abfd, r_symndx); 938 if (isym == NULL) 939 return FALSE; 940 941 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 942 { 943 struct plt_entry *plt; 944 945 if (htab->elf.dynobj == NULL) 946 htab->elf.dynobj = abfd; 947 948 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) 949 return FALSE; 950 951 if (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 plt = elf_s390_local_plt (abfd); 958 plt[r_symndx].plt.refcount++; 959 } 960 h = NULL; 961 } 962 else 963 { 964 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 965 while (h->root.type == bfd_link_hash_indirect 966 || h->root.type == bfd_link_hash_warning) 967 h = (struct elf_link_hash_entry *) h->root.u.i.link; 968 969 /* PR15323, ref flags aren't set for references in the same 970 object. */ 971 h->root.non_ir_ref = 1; 972 } 973 974 /* Create got section and local_got_refcounts array if they 975 are needed. */ 976 r_type = elf_s390_tls_transition (info, 977 ELF64_R_TYPE (rel->r_info), 978 h == NULL); 979 switch (r_type) 980 { 981 case R_390_GOT12: 982 case R_390_GOT16: 983 case R_390_GOT20: 984 case R_390_GOT32: 985 case R_390_GOT64: 986 case R_390_GOTENT: 987 case R_390_GOTPLT12: 988 case R_390_GOTPLT16: 989 case R_390_GOTPLT20: 990 case R_390_GOTPLT32: 991 case R_390_GOTPLT64: 992 case R_390_GOTPLTENT: 993 case R_390_TLS_GD64: 994 case R_390_TLS_GOTIE12: 995 case R_390_TLS_GOTIE20: 996 case R_390_TLS_GOTIE64: 997 case R_390_TLS_IEENT: 998 case R_390_TLS_IE64: 999 case R_390_TLS_LDM64: 1000 if (h == NULL 1001 && local_got_refcounts == NULL) 1002 { 1003 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr)) 1004 return FALSE; 1005 local_got_refcounts = elf_local_got_refcounts (abfd); 1006 } 1007 1008 /* Fall through. */ 1009 case R_390_GOTOFF16: 1010 case R_390_GOTOFF32: 1011 case R_390_GOTOFF64: 1012 case R_390_GOTPC: 1013 case R_390_GOTPCDBL: 1014 if (htab->elf.sgot == NULL) 1015 { 1016 if (htab->elf.dynobj == NULL) 1017 htab->elf.dynobj = abfd; 1018 if (!create_got_section (htab->elf.dynobj, info)) 1019 return FALSE; 1020 } 1021 } 1022 1023 if (h != NULL) 1024 { 1025 if (htab->elf.dynobj == NULL) 1026 htab->elf.dynobj = abfd; 1027 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) 1028 return FALSE; 1029 1030 /* Make sure an IFUNC symbol defined in a non-shared object 1031 always gets a PLT slot. */ 1032 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 1033 { 1034 /* The symbol is called by the dynamic loader in order 1035 to resolve the relocation. So it is in fact also 1036 referenced. */ 1037 h->ref_regular = 1; 1038 h->needs_plt = 1; 1039 } 1040 } 1041 1042 switch (r_type) 1043 { 1044 case R_390_GOTOFF16: 1045 case R_390_GOTOFF32: 1046 case R_390_GOTOFF64: 1047 case R_390_GOTPC: 1048 case R_390_GOTPCDBL: 1049 /* These relocs do not need a GOT slot. They just load the 1050 GOT pointer itself or address something else relative to 1051 the GOT. Since the GOT pointer has been set up above we 1052 are done. */ 1053 break; 1054 1055 case R_390_PLT12DBL: 1056 case R_390_PLT16DBL: 1057 case R_390_PLT24DBL: 1058 case R_390_PLT32: 1059 case R_390_PLT32DBL: 1060 case R_390_PLT64: 1061 case R_390_PLTOFF16: 1062 case R_390_PLTOFF32: 1063 case R_390_PLTOFF64: 1064 /* This symbol requires a procedure linkage table entry. We 1065 actually build the entry in adjust_dynamic_symbol, 1066 because this might be a case of linking PIC code which is 1067 never referenced by a dynamic object, in which case we 1068 don't need to generate a procedure linkage table entry 1069 after all. */ 1070 1071 /* If this is a local symbol, we resolve it directly without 1072 creating a procedure linkage table entry. */ 1073 if (h != NULL) 1074 { 1075 h->needs_plt = 1; 1076 h->plt.refcount += 1; 1077 } 1078 break; 1079 1080 case R_390_GOTPLT12: 1081 case R_390_GOTPLT16: 1082 case R_390_GOTPLT20: 1083 case R_390_GOTPLT32: 1084 case R_390_GOTPLT64: 1085 case R_390_GOTPLTENT: 1086 /* This symbol requires either a procedure linkage table entry 1087 or an entry in the local got. We actually build the entry 1088 in adjust_dynamic_symbol because whether this is really a 1089 global reference can change and with it the fact if we have 1090 to create a plt entry or a local got entry. To be able to 1091 make a once global symbol a local one we have to keep track 1092 of the number of gotplt references that exist for this 1093 symbol. */ 1094 if (h != NULL) 1095 { 1096 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; 1097 h->needs_plt = 1; 1098 h->plt.refcount += 1; 1099 } 1100 else 1101 local_got_refcounts[r_symndx] += 1; 1102 break; 1103 1104 case R_390_TLS_LDM64: 1105 htab->tls_ldm_got.refcount += 1; 1106 break; 1107 1108 case R_390_TLS_IE64: 1109 case R_390_TLS_GOTIE12: 1110 case R_390_TLS_GOTIE20: 1111 case R_390_TLS_GOTIE64: 1112 case R_390_TLS_IEENT: 1113 if (info->shared) 1114 info->flags |= DF_STATIC_TLS; 1115 /* Fall through */ 1116 1117 case R_390_GOT12: 1118 case R_390_GOT16: 1119 case R_390_GOT20: 1120 case R_390_GOT32: 1121 case R_390_GOT64: 1122 case R_390_GOTENT: 1123 case R_390_TLS_GD64: 1124 /* This symbol requires a global offset table entry. */ 1125 switch (r_type) 1126 { 1127 default: 1128 case R_390_GOT12: 1129 case R_390_GOT16: 1130 case R_390_GOT20: 1131 case R_390_GOT32: 1132 case R_390_GOTENT: 1133 tls_type = GOT_NORMAL; 1134 break; 1135 case R_390_TLS_GD64: 1136 tls_type = GOT_TLS_GD; 1137 break; 1138 case R_390_TLS_IE64: 1139 case R_390_TLS_GOTIE64: 1140 tls_type = GOT_TLS_IE; 1141 break; 1142 case R_390_TLS_GOTIE12: 1143 case R_390_TLS_GOTIE20: 1144 case R_390_TLS_IEENT: 1145 tls_type = GOT_TLS_IE_NLT; 1146 break; 1147 } 1148 1149 if (h != NULL) 1150 { 1151 h->got.refcount += 1; 1152 old_tls_type = elf_s390_hash_entry(h)->tls_type; 1153 } 1154 else 1155 { 1156 local_got_refcounts[r_symndx] += 1; 1157 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; 1158 } 1159 /* If a TLS symbol is accessed using IE at least once, 1160 there is no point to use dynamic model for it. */ 1161 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) 1162 { 1163 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) 1164 { 1165 (*_bfd_error_handler) 1166 (_("%B: `%s' accessed both as normal and thread local symbol"), 1167 abfd, h->root.root.string); 1168 return FALSE; 1169 } 1170 if (old_tls_type > tls_type) 1171 tls_type = old_tls_type; 1172 } 1173 1174 if (old_tls_type != tls_type) 1175 { 1176 if (h != NULL) 1177 elf_s390_hash_entry (h)->tls_type = tls_type; 1178 else 1179 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; 1180 } 1181 1182 if (r_type != R_390_TLS_IE64) 1183 break; 1184 /* Fall through */ 1185 1186 case R_390_TLS_LE64: 1187 if (!info->shared) 1188 break; 1189 info->flags |= DF_STATIC_TLS; 1190 /* Fall through */ 1191 1192 case R_390_8: 1193 case R_390_16: 1194 case R_390_32: 1195 case R_390_64: 1196 case R_390_PC12DBL: 1197 case R_390_PC16: 1198 case R_390_PC16DBL: 1199 case R_390_PC24DBL: 1200 case R_390_PC32: 1201 case R_390_PC32DBL: 1202 case R_390_PC64: 1203 if (h != NULL) 1204 { 1205 /* If this reloc is in a read-only section, we might 1206 need a copy reloc. We can't check reliably at this 1207 stage whether the section is read-only, as input 1208 sections have not yet been mapped to output sections. 1209 Tentatively set the flag for now, and correct in 1210 adjust_dynamic_symbol. */ 1211 h->non_got_ref = 1; 1212 1213 if (!info->shared) 1214 { 1215 /* We may need a .plt entry if the function this reloc 1216 refers to is in a shared lib. */ 1217 h->plt.refcount += 1; 1218 } 1219 } 1220 1221 /* If we are creating a shared library, and this is a reloc 1222 against a global symbol, or a non PC relative reloc 1223 against a local symbol, then we need to copy the reloc 1224 into the shared library. However, if we are linking with 1225 -Bsymbolic, we do not need to copy a reloc against a 1226 global symbol which is defined in an object we are 1227 including in the link (i.e., DEF_REGULAR is set). At 1228 this point we have not seen all the input files, so it is 1229 possible that DEF_REGULAR is not set now but will be set 1230 later (it is never cleared). In case of a weak definition, 1231 DEF_REGULAR may be cleared later by a strong definition in 1232 a shared library. We account for that possibility below by 1233 storing information in the relocs_copied field of the hash 1234 table entry. A similar situation occurs when creating 1235 shared libraries and symbol visibility changes render the 1236 symbol local. 1237 1238 If on the other hand, we are creating an executable, we 1239 may need to keep relocations for symbols satisfied by a 1240 dynamic library if we manage to avoid copy relocs for the 1241 symbol. */ 1242 if ((info->shared 1243 && (sec->flags & SEC_ALLOC) != 0 1244 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16 1245 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL 1246 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL 1247 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL 1248 && ELF64_R_TYPE (rel->r_info) != R_390_PC32 1249 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL 1250 && ELF64_R_TYPE (rel->r_info) != R_390_PC64) 1251 || (h != NULL 1252 && (! SYMBOLIC_BIND (info, h) 1253 || h->root.type == bfd_link_hash_defweak 1254 || !h->def_regular)))) 1255 || (ELIMINATE_COPY_RELOCS 1256 && !info->shared 1257 && (sec->flags & SEC_ALLOC) != 0 1258 && h != NULL 1259 && (h->root.type == bfd_link_hash_defweak 1260 || !h->def_regular))) 1261 { 1262 struct elf_dyn_relocs *p; 1263 struct elf_dyn_relocs **head; 1264 1265 /* We must copy these reloc types into the output file. 1266 Create a reloc section in dynobj and make room for 1267 this reloc. */ 1268 if (sreloc == NULL) 1269 { 1270 if (htab->elf.dynobj == NULL) 1271 htab->elf.dynobj = abfd; 1272 1273 sreloc = _bfd_elf_make_dynamic_reloc_section 1274 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE); 1275 1276 if (sreloc == NULL) 1277 return FALSE; 1278 } 1279 1280 /* If this is a global symbol, we count the number of 1281 relocations we need for this symbol. */ 1282 if (h != NULL) 1283 { 1284 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; 1285 } 1286 else 1287 { 1288 /* Track dynamic relocs needed for local syms too. 1289 We really need local syms available to do this 1290 easily. Oh well. */ 1291 asection *s; 1292 void *vpp; 1293 1294 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 1295 abfd, r_symndx); 1296 if (isym == NULL) 1297 return FALSE; 1298 1299 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 1300 if (s == NULL) 1301 s = sec; 1302 1303 vpp = &elf_section_data (s)->local_dynrel; 1304 head = (struct elf_dyn_relocs **) vpp; 1305 } 1306 1307 p = *head; 1308 if (p == NULL || p->sec != sec) 1309 { 1310 bfd_size_type amt = sizeof *p; 1311 p = ((struct elf_dyn_relocs *) 1312 bfd_alloc (htab->elf.dynobj, amt)); 1313 if (p == NULL) 1314 return FALSE; 1315 p->next = *head; 1316 *head = p; 1317 p->sec = sec; 1318 p->count = 0; 1319 p->pc_count = 0; 1320 } 1321 1322 p->count += 1; 1323 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16 1324 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL 1325 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL 1326 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL 1327 || ELF64_R_TYPE (rel->r_info) == R_390_PC32 1328 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL 1329 || ELF64_R_TYPE (rel->r_info) == R_390_PC64) 1330 p->pc_count += 1; 1331 } 1332 break; 1333 1334 /* This relocation describes the C++ object vtable hierarchy. 1335 Reconstruct it for later use during GC. */ 1336 case R_390_GNU_VTINHERIT: 1337 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1338 return FALSE; 1339 break; 1340 1341 /* This relocation describes which C++ vtable entries are actually 1342 used. Record for later use during GC. */ 1343 case R_390_GNU_VTENTRY: 1344 BFD_ASSERT (h != NULL); 1345 if (h != NULL 1346 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1347 return FALSE; 1348 break; 1349 1350 default: 1351 break; 1352 } 1353 } 1354 1355 return TRUE; 1356 } 1357 1358 /* Return the section that should be marked against GC for a given 1359 relocation. */ 1360 1361 static asection * 1362 elf_s390_gc_mark_hook (asection *sec, 1363 struct bfd_link_info *info, 1364 Elf_Internal_Rela *rel, 1365 struct elf_link_hash_entry *h, 1366 Elf_Internal_Sym *sym) 1367 { 1368 if (h != NULL) 1369 switch (ELF64_R_TYPE (rel->r_info)) 1370 { 1371 case R_390_GNU_VTINHERIT: 1372 case R_390_GNU_VTENTRY: 1373 return NULL; 1374 } 1375 1376 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1377 } 1378 1379 /* Update the got entry reference counts for the section being removed. */ 1380 1381 static bfd_boolean 1382 elf_s390_gc_sweep_hook (bfd *abfd, 1383 struct bfd_link_info *info, 1384 asection *sec, 1385 const Elf_Internal_Rela *relocs) 1386 { 1387 struct elf_s390_link_hash_table *htab; 1388 Elf_Internal_Shdr *symtab_hdr; 1389 struct elf_link_hash_entry **sym_hashes; 1390 bfd_signed_vma *local_got_refcounts; 1391 const Elf_Internal_Rela *rel, *relend; 1392 1393 if (info->relocatable) 1394 return TRUE; 1395 1396 htab = elf_s390_hash_table (info); 1397 if (htab == NULL) 1398 return FALSE; 1399 1400 elf_section_data (sec)->local_dynrel = NULL; 1401 1402 symtab_hdr = &elf_symtab_hdr (abfd); 1403 sym_hashes = elf_sym_hashes (abfd); 1404 local_got_refcounts = elf_local_got_refcounts (abfd); 1405 1406 relend = relocs + sec->reloc_count; 1407 for (rel = relocs; rel < relend; rel++) 1408 { 1409 unsigned long r_symndx; 1410 unsigned int r_type; 1411 struct elf_link_hash_entry *h = NULL; 1412 1413 r_symndx = ELF64_R_SYM (rel->r_info); 1414 if (r_symndx >= symtab_hdr->sh_info) 1415 { 1416 struct elf_s390_link_hash_entry *eh; 1417 struct elf_dyn_relocs **pp; 1418 struct elf_dyn_relocs *p; 1419 1420 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1421 while (h->root.type == bfd_link_hash_indirect 1422 || h->root.type == bfd_link_hash_warning) 1423 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1424 eh = (struct elf_s390_link_hash_entry *) h; 1425 1426 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 1427 if (p->sec == sec) 1428 { 1429 /* Everything must go for SEC. */ 1430 *pp = p->next; 1431 break; 1432 } 1433 } 1434 else 1435 { 1436 Elf_Internal_Sym *isym; 1437 1438 /* A local symbol. */ 1439 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 1440 abfd, r_symndx); 1441 if (isym == NULL) 1442 return FALSE; 1443 1444 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 1445 { 1446 struct plt_entry *plt = elf_s390_local_plt (abfd); 1447 if (plt[r_symndx].plt.refcount > 0) 1448 plt[r_symndx].plt.refcount--; 1449 } 1450 } 1451 1452 r_type = ELF64_R_TYPE (rel->r_info); 1453 r_type = elf_s390_tls_transition (info, r_type, h != NULL); 1454 switch (r_type) 1455 { 1456 case R_390_TLS_LDM64: 1457 if (htab->tls_ldm_got.refcount > 0) 1458 htab->tls_ldm_got.refcount -= 1; 1459 break; 1460 1461 case R_390_TLS_GD64: 1462 case R_390_TLS_IE64: 1463 case R_390_TLS_GOTIE12: 1464 case R_390_TLS_GOTIE20: 1465 case R_390_TLS_GOTIE64: 1466 case R_390_TLS_IEENT: 1467 case R_390_GOT12: 1468 case R_390_GOT16: 1469 case R_390_GOT20: 1470 case R_390_GOT32: 1471 case R_390_GOT64: 1472 case R_390_GOTOFF16: 1473 case R_390_GOTOFF32: 1474 case R_390_GOTOFF64: 1475 case R_390_GOTPC: 1476 case R_390_GOTPCDBL: 1477 case R_390_GOTENT: 1478 if (h != NULL) 1479 { 1480 if (h->got.refcount > 0) 1481 h->got.refcount -= 1; 1482 } 1483 else if (local_got_refcounts != NULL) 1484 { 1485 if (local_got_refcounts[r_symndx] > 0) 1486 local_got_refcounts[r_symndx] -= 1; 1487 } 1488 break; 1489 1490 case R_390_8: 1491 case R_390_12: 1492 case R_390_16: 1493 case R_390_20: 1494 case R_390_32: 1495 case R_390_64: 1496 case R_390_PC16: 1497 case R_390_PC12DBL: 1498 case R_390_PC16DBL: 1499 case R_390_PC24DBL: 1500 case R_390_PC32: 1501 case R_390_PC32DBL: 1502 case R_390_PC64: 1503 if (info->shared) 1504 break; 1505 /* Fall through */ 1506 1507 case R_390_PLT12DBL: 1508 case R_390_PLT16DBL: 1509 case R_390_PLT24DBL: 1510 case R_390_PLT32: 1511 case R_390_PLT32DBL: 1512 case R_390_PLT64: 1513 case R_390_PLTOFF16: 1514 case R_390_PLTOFF32: 1515 case R_390_PLTOFF64: 1516 if (h != NULL) 1517 { 1518 if (h->plt.refcount > 0) 1519 h->plt.refcount -= 1; 1520 } 1521 break; 1522 1523 case R_390_GOTPLT12: 1524 case R_390_GOTPLT16: 1525 case R_390_GOTPLT20: 1526 case R_390_GOTPLT32: 1527 case R_390_GOTPLT64: 1528 case R_390_GOTPLTENT: 1529 if (h != NULL) 1530 { 1531 if (h->plt.refcount > 0) 1532 { 1533 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; 1534 h->plt.refcount -= 1; 1535 } 1536 } 1537 else if (local_got_refcounts != NULL) 1538 { 1539 if (local_got_refcounts[r_symndx] > 0) 1540 local_got_refcounts[r_symndx] -= 1; 1541 } 1542 break; 1543 1544 default: 1545 break; 1546 } 1547 } 1548 1549 return TRUE; 1550 } 1551 1552 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT 1553 entry but we found we will not create any. Called when we find we will 1554 not have any PLT for this symbol, by for example 1555 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, 1556 or elf_s390_size_dynamic_sections if no dynamic sections will be 1557 created (we're only linking static objects). */ 1558 1559 static void 1560 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h) 1561 { 1562 if (h->elf.root.type == bfd_link_hash_warning) 1563 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; 1564 1565 if (h->gotplt_refcount <= 0) 1566 return; 1567 1568 /* We simply add the number of gotplt references to the number 1569 * of got references for this symbol. */ 1570 h->elf.got.refcount += h->gotplt_refcount; 1571 h->gotplt_refcount = -1; 1572 } 1573 1574 /* Adjust a symbol defined by a dynamic object and referenced by a 1575 regular object. The current definition is in some section of the 1576 dynamic object, but we're not including those sections. We have to 1577 change the definition to something the rest of the link can 1578 understand. */ 1579 1580 static bfd_boolean 1581 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info, 1582 struct elf_link_hash_entry *h) 1583 { 1584 struct elf_s390_link_hash_table *htab; 1585 asection *s; 1586 1587 /* STT_GNU_IFUNC symbol must go through PLT. */ 1588 if (s390_is_ifunc_symbol_p (h)) 1589 return TRUE; 1590 1591 /* If this is a function, put it in the procedure linkage table. We 1592 will fill in the contents of the procedure linkage table later 1593 (although we could actually do it here). */ 1594 if (h->type == STT_FUNC 1595 || h->needs_plt) 1596 { 1597 if (h->plt.refcount <= 0 1598 || SYMBOL_CALLS_LOCAL (info, h) 1599 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 1600 && h->root.type == bfd_link_hash_undefweak)) 1601 { 1602 /* This case can occur if we saw a PLT32 reloc in an input 1603 file, but the symbol was never referred to by a dynamic 1604 object, or if all references were garbage collected. In 1605 such a case, we don't actually need to build a procedure 1606 linkage table, and we can just do a PC32 reloc instead. */ 1607 h->plt.offset = (bfd_vma) -1; 1608 h->needs_plt = 0; 1609 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1610 } 1611 1612 return TRUE; 1613 } 1614 else 1615 /* It's possible that we incorrectly decided a .plt reloc was 1616 needed for an R_390_PC32 reloc to a non-function sym in 1617 check_relocs. We can't decide accurately between function and 1618 non-function syms in check-relocs; Objects loaded later in 1619 the link may change h->type. So fix it now. */ 1620 h->plt.offset = (bfd_vma) -1; 1621 1622 /* If this is a weak symbol, and there is a real definition, the 1623 processor independent code will have arranged for us to see the 1624 real definition first, and we can just use the same value. */ 1625 if (h->u.weakdef != NULL) 1626 { 1627 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 1628 || h->u.weakdef->root.type == bfd_link_hash_defweak); 1629 h->root.u.def.section = h->u.weakdef->root.u.def.section; 1630 h->root.u.def.value = h->u.weakdef->root.u.def.value; 1631 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) 1632 h->non_got_ref = h->u.weakdef->non_got_ref; 1633 return TRUE; 1634 } 1635 1636 /* This is a reference to a symbol defined by a dynamic object which 1637 is not a function. */ 1638 1639 /* If we are creating a shared library, we must presume that the 1640 only references to the symbol are via the global offset table. 1641 For such cases we need not do anything here; the relocations will 1642 be handled correctly by relocate_section. */ 1643 if (info->shared) 1644 return TRUE; 1645 1646 /* If there are no references to this symbol that do not use the 1647 GOT, we don't need to generate a copy reloc. */ 1648 if (!h->non_got_ref) 1649 return TRUE; 1650 1651 /* If -z nocopyreloc was given, we won't generate them either. */ 1652 if (info->nocopyreloc) 1653 { 1654 h->non_got_ref = 0; 1655 return TRUE; 1656 } 1657 1658 if (ELIMINATE_COPY_RELOCS) 1659 { 1660 struct elf_s390_link_hash_entry * eh; 1661 struct elf_dyn_relocs *p; 1662 1663 eh = (struct elf_s390_link_hash_entry *) h; 1664 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1665 { 1666 s = p->sec->output_section; 1667 if (s != NULL && (s->flags & SEC_READONLY) != 0) 1668 break; 1669 } 1670 1671 /* If we didn't find any dynamic relocs in read-only sections, then 1672 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 1673 if (p == NULL) 1674 { 1675 h->non_got_ref = 0; 1676 return TRUE; 1677 } 1678 } 1679 1680 /* We must allocate the symbol in our .dynbss section, which will 1681 become part of the .bss section of the executable. There will be 1682 an entry for this symbol in the .dynsym section. The dynamic 1683 object will contain position independent code, so all references 1684 from the dynamic object to this symbol will go through the global 1685 offset table. The dynamic linker will use the .dynsym entry to 1686 determine the address it must put in the global offset table, so 1687 both the dynamic object and the regular object will refer to the 1688 same memory location for the variable. */ 1689 1690 htab = elf_s390_hash_table (info); 1691 if (htab == NULL) 1692 return FALSE; 1693 1694 /* We must generate a R_390_COPY reloc to tell the dynamic linker to 1695 copy the initial value out of the dynamic object and into the 1696 runtime process image. */ 1697 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 1698 { 1699 htab->srelbss->size += sizeof (Elf64_External_Rela); 1700 h->needs_copy = 1; 1701 } 1702 1703 s = htab->sdynbss; 1704 1705 return _bfd_elf_adjust_dynamic_copy (h, s); 1706 } 1707 1708 /* Allocate space in .plt, .got and associated reloc sections for 1709 dynamic relocs. */ 1710 1711 static bfd_boolean 1712 allocate_dynrelocs (struct elf_link_hash_entry *h, 1713 void * inf) 1714 { 1715 struct bfd_link_info *info; 1716 struct elf_s390_link_hash_table *htab; 1717 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h; 1718 struct elf_dyn_relocs *p; 1719 1720 if (h->root.type == bfd_link_hash_indirect) 1721 return TRUE; 1722 1723 info = (struct bfd_link_info *) inf; 1724 htab = elf_s390_hash_table (info); 1725 if (htab == NULL) 1726 return FALSE; 1727 1728 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it 1729 here if it is defined and referenced in a non-shared object. */ 1730 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 1731 return s390_elf_allocate_ifunc_dyn_relocs (info, h, 1732 &eh->dyn_relocs); 1733 else if (htab->elf.dynamic_sections_created 1734 && h->plt.refcount > 0) 1735 { 1736 /* Make sure this symbol is output as a dynamic symbol. 1737 Undefined weak syms won't yet be marked as dynamic. */ 1738 if (h->dynindx == -1 1739 && !h->forced_local) 1740 { 1741 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1742 return FALSE; 1743 } 1744 1745 if (info->shared 1746 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) 1747 { 1748 asection *s = htab->elf.splt; 1749 1750 /* If this is the first .plt entry, make room for the special 1751 first entry. */ 1752 if (s->size == 0) 1753 s->size += PLT_FIRST_ENTRY_SIZE; 1754 1755 h->plt.offset = s->size; 1756 1757 /* If this symbol is not defined in a regular file, and we are 1758 not generating a shared library, then set the symbol to this 1759 location in the .plt. This is required to make function 1760 pointers compare as equal between the normal executable and 1761 the shared library. */ 1762 if (! info->shared 1763 && !h->def_regular) 1764 { 1765 h->root.u.def.section = s; 1766 h->root.u.def.value = h->plt.offset; 1767 } 1768 1769 /* Make room for this entry. */ 1770 s->size += PLT_ENTRY_SIZE; 1771 1772 /* We also need to make an entry in the .got.plt section, which 1773 will be placed in the .got section by the linker script. */ 1774 htab->elf.sgotplt->size += GOT_ENTRY_SIZE; 1775 1776 /* We also need to make an entry in the .rela.plt section. */ 1777 htab->elf.srelplt->size += sizeof (Elf64_External_Rela); 1778 } 1779 else 1780 { 1781 h->plt.offset = (bfd_vma) -1; 1782 h->needs_plt = 0; 1783 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1784 } 1785 } 1786 else 1787 { 1788 h->plt.offset = (bfd_vma) -1; 1789 h->needs_plt = 0; 1790 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1791 } 1792 1793 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to 1794 the binary, we can optimize a bit. IE64 and GOTIE64 get converted 1795 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT 1796 we can save the dynamic TLS relocation. */ 1797 if (h->got.refcount > 0 1798 && !info->shared 1799 && h->dynindx == -1 1800 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) 1801 { 1802 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) 1803 /* For the GOTIE access without a literal pool entry the offset has 1804 to be stored somewhere. The immediate value in the instruction 1805 is not bit enough so the value is stored in the got. */ 1806 { 1807 h->got.offset = htab->elf.sgot->size; 1808 htab->elf.sgot->size += GOT_ENTRY_SIZE; 1809 } 1810 else 1811 h->got.offset = (bfd_vma) -1; 1812 } 1813 else if (h->got.refcount > 0) 1814 { 1815 asection *s; 1816 bfd_boolean dyn; 1817 int tls_type = elf_s390_hash_entry(h)->tls_type; 1818 1819 /* Make sure this symbol is output as a dynamic symbol. 1820 Undefined weak syms won't yet be marked as dynamic. */ 1821 if (h->dynindx == -1 1822 && !h->forced_local) 1823 { 1824 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1825 return FALSE; 1826 } 1827 1828 s = htab->elf.sgot; 1829 h->got.offset = s->size; 1830 s->size += GOT_ENTRY_SIZE; 1831 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */ 1832 if (tls_type == GOT_TLS_GD) 1833 s->size += GOT_ENTRY_SIZE; 1834 dyn = htab->elf.dynamic_sections_created; 1835 /* R_390_TLS_IE64 needs one dynamic relocation, 1836 R_390_TLS_GD64 needs one if local symbol and two if global. */ 1837 if ((tls_type == GOT_TLS_GD && h->dynindx == -1) 1838 || tls_type >= GOT_TLS_IE) 1839 htab->elf.srelgot->size += sizeof (Elf64_External_Rela); 1840 else if (tls_type == GOT_TLS_GD) 1841 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela); 1842 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1843 || h->root.type != bfd_link_hash_undefweak) 1844 && (info->shared 1845 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) 1846 htab->elf.srelgot->size += sizeof (Elf64_External_Rela); 1847 } 1848 else 1849 h->got.offset = (bfd_vma) -1; 1850 1851 if (eh->dyn_relocs == NULL) 1852 return TRUE; 1853 1854 /* In the shared -Bsymbolic case, discard space allocated for 1855 dynamic pc-relative relocs against symbols which turn out to be 1856 defined in regular objects. For the normal shared case, discard 1857 space for pc-relative relocs that have become local due to symbol 1858 visibility changes. */ 1859 1860 if (info->shared) 1861 { 1862 if (SYMBOL_CALLS_LOCAL (info, h)) 1863 { 1864 struct elf_dyn_relocs **pp; 1865 1866 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 1867 { 1868 p->count -= p->pc_count; 1869 p->pc_count = 0; 1870 if (p->count == 0) 1871 *pp = p->next; 1872 else 1873 pp = &p->next; 1874 } 1875 } 1876 1877 /* Also discard relocs on undefined weak syms with non-default 1878 visibility. */ 1879 if (eh->dyn_relocs != NULL 1880 && h->root.type == bfd_link_hash_undefweak) 1881 { 1882 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 1883 eh->dyn_relocs = NULL; 1884 1885 /* Make sure undefined weak symbols are output as a dynamic 1886 symbol in PIEs. */ 1887 else if (h->dynindx == -1 1888 && !h->forced_local) 1889 { 1890 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1891 return FALSE; 1892 } 1893 } 1894 } 1895 else if (ELIMINATE_COPY_RELOCS) 1896 { 1897 /* For the non-shared case, discard space for relocs against 1898 symbols which turn out to need copy relocs or are not 1899 dynamic. */ 1900 1901 if (!h->non_got_ref 1902 && ((h->def_dynamic 1903 && !h->def_regular) 1904 || (htab->elf.dynamic_sections_created 1905 && (h->root.type == bfd_link_hash_undefweak 1906 || h->root.type == bfd_link_hash_undefined)))) 1907 { 1908 /* Make sure this symbol is output as a dynamic symbol. 1909 Undefined weak syms won't yet be marked as dynamic. */ 1910 if (h->dynindx == -1 1911 && !h->forced_local) 1912 { 1913 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1914 return FALSE; 1915 } 1916 1917 /* If that succeeded, we know we'll be keeping all the 1918 relocs. */ 1919 if (h->dynindx != -1) 1920 goto keep; 1921 } 1922 1923 eh->dyn_relocs = NULL; 1924 1925 keep: ; 1926 } 1927 1928 /* Finally, allocate space. */ 1929 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1930 { 1931 asection *sreloc = elf_section_data (p->sec)->sreloc; 1932 sreloc->size += p->count * sizeof (Elf64_External_Rela); 1933 } 1934 1935 return TRUE; 1936 } 1937 1938 /* Find any dynamic relocs that apply to read-only sections. */ 1939 1940 static bfd_boolean 1941 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) 1942 { 1943 struct elf_s390_link_hash_entry *eh; 1944 struct elf_dyn_relocs *p; 1945 1946 eh = (struct elf_s390_link_hash_entry *) h; 1947 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1948 { 1949 asection *s = p->sec->output_section; 1950 1951 if (s != NULL && (s->flags & SEC_READONLY) != 0) 1952 { 1953 struct bfd_link_info *info = (struct bfd_link_info *) inf; 1954 1955 info->flags |= DF_TEXTREL; 1956 1957 /* Not an error, just cut short the traversal. */ 1958 return FALSE; 1959 } 1960 } 1961 return TRUE; 1962 } 1963 1964 /* Set the sizes of the dynamic sections. */ 1965 1966 static bfd_boolean 1967 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 1968 struct bfd_link_info *info) 1969 { 1970 struct elf_s390_link_hash_table *htab; 1971 bfd *dynobj; 1972 asection *s; 1973 bfd_boolean relocs; 1974 bfd *ibfd; 1975 1976 htab = elf_s390_hash_table (info); 1977 if (htab == NULL) 1978 return FALSE; 1979 1980 dynobj = htab->elf.dynobj; 1981 if (dynobj == NULL) 1982 abort (); 1983 1984 if (htab->elf.dynamic_sections_created) 1985 { 1986 /* Set the contents of the .interp section to the interpreter. */ 1987 if (info->executable) 1988 { 1989 s = bfd_get_linker_section (dynobj, ".interp"); 1990 if (s == NULL) 1991 abort (); 1992 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 1993 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 1994 } 1995 } 1996 1997 /* Set up .got offsets for local syms, and space for local dynamic 1998 relocs. */ 1999 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 2000 { 2001 bfd_signed_vma *local_got; 2002 bfd_signed_vma *end_local_got; 2003 char *local_tls_type; 2004 bfd_size_type locsymcount; 2005 Elf_Internal_Shdr *symtab_hdr; 2006 asection *srela; 2007 struct plt_entry *local_plt; 2008 unsigned int i; 2009 2010 if (! is_s390_elf (ibfd)) 2011 continue; 2012 2013 for (s = ibfd->sections; s != NULL; s = s->next) 2014 { 2015 struct elf_dyn_relocs *p; 2016 2017 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) 2018 { 2019 if (!bfd_is_abs_section (p->sec) 2020 && bfd_is_abs_section (p->sec->output_section)) 2021 { 2022 /* Input section has been discarded, either because 2023 it is a copy of a linkonce section or due to 2024 linker script /DISCARD/, so we'll be discarding 2025 the relocs too. */ 2026 } 2027 else if (p->count != 0) 2028 { 2029 srela = elf_section_data (p->sec)->sreloc; 2030 srela->size += p->count * sizeof (Elf64_External_Rela); 2031 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2032 info->flags |= DF_TEXTREL; 2033 } 2034 } 2035 } 2036 2037 local_got = elf_local_got_refcounts (ibfd); 2038 if (!local_got) 2039 continue; 2040 2041 symtab_hdr = &elf_symtab_hdr (ibfd); 2042 locsymcount = symtab_hdr->sh_info; 2043 end_local_got = local_got + locsymcount; 2044 local_tls_type = elf_s390_local_got_tls_type (ibfd); 2045 s = htab->elf.sgot; 2046 srela = htab->elf.srelgot; 2047 for (; local_got < end_local_got; ++local_got, ++local_tls_type) 2048 { 2049 if (*local_got > 0) 2050 { 2051 *local_got = s->size; 2052 s->size += GOT_ENTRY_SIZE; 2053 if (*local_tls_type == GOT_TLS_GD) 2054 s->size += GOT_ENTRY_SIZE; 2055 if (info->shared) 2056 srela->size += sizeof (Elf64_External_Rela); 2057 } 2058 else 2059 *local_got = (bfd_vma) -1; 2060 } 2061 2062 local_plt = elf_s390_local_plt (ibfd); 2063 for (i = 0; i < symtab_hdr->sh_info; i++) 2064 { 2065 if (local_plt[i].plt.refcount > 0) 2066 { 2067 local_plt[i].plt.offset = htab->elf.iplt->size; 2068 htab->elf.iplt->size += PLT_ENTRY_SIZE; 2069 htab->elf.igotplt->size += GOT_ENTRY_SIZE; 2070 htab->elf.irelplt->size += sizeof (Elf64_External_Rela); 2071 } 2072 else 2073 local_plt[i].plt.offset = (bfd_vma) -1; 2074 } 2075 } 2076 2077 if (htab->tls_ldm_got.refcount > 0) 2078 { 2079 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64 2080 relocs. */ 2081 htab->tls_ldm_got.offset = htab->elf.sgot->size; 2082 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; 2083 htab->elf.srelgot->size += sizeof (Elf64_External_Rela); 2084 } 2085 else 2086 htab->tls_ldm_got.offset = -1; 2087 2088 /* Allocate global sym .plt and .got entries, and space for global 2089 sym dynamic relocs. */ 2090 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); 2091 2092 /* We now have determined the sizes of the various dynamic sections. 2093 Allocate memory for them. */ 2094 relocs = FALSE; 2095 for (s = dynobj->sections; s != NULL; s = s->next) 2096 { 2097 if ((s->flags & SEC_LINKER_CREATED) == 0) 2098 continue; 2099 2100 if (s == htab->elf.splt 2101 || s == htab->elf.sgot 2102 || s == htab->elf.sgotplt 2103 || s == htab->sdynbss 2104 || s == htab->elf.iplt 2105 || s == htab->elf.igotplt 2106 || s == htab->irelifunc) 2107 { 2108 /* Strip this section if we don't need it; see the 2109 comment below. */ 2110 } 2111 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) 2112 { 2113 if (s->size != 0 && s != htab->elf.srelplt) 2114 relocs = TRUE; 2115 2116 /* We use the reloc_count field as a counter if we need 2117 to copy relocs into the output file. */ 2118 s->reloc_count = 0; 2119 } 2120 else 2121 { 2122 /* It's not one of our sections, so don't allocate space. */ 2123 continue; 2124 } 2125 2126 if (s->size == 0) 2127 { 2128 /* If we don't need this section, strip it from the 2129 output file. This is to handle .rela.bss and 2130 .rela.plt. We must create it in 2131 create_dynamic_sections, because it must be created 2132 before the linker maps input sections to output 2133 sections. The linker does that before 2134 adjust_dynamic_symbol is called, and it is that 2135 function which decides whether anything needs to go 2136 into these sections. */ 2137 2138 s->flags |= SEC_EXCLUDE; 2139 continue; 2140 } 2141 2142 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2143 continue; 2144 2145 /* Allocate memory for the section contents. We use bfd_zalloc 2146 here in case unused entries are not reclaimed before the 2147 section's contents are written out. This should not happen, 2148 but this way if it does, we get a R_390_NONE reloc instead 2149 of garbage. */ 2150 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 2151 if (s->contents == NULL) 2152 return FALSE; 2153 } 2154 2155 if (htab->elf.dynamic_sections_created) 2156 { 2157 /* Add some entries to the .dynamic section. We fill in the 2158 values later, in elf_s390_finish_dynamic_sections, but we 2159 must add the entries now so that we get the correct size for 2160 the .dynamic section. The DT_DEBUG entry is filled in by the 2161 dynamic linker and used by the debugger. */ 2162 #define add_dynamic_entry(TAG, VAL) \ 2163 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2164 2165 if (info->executable) 2166 { 2167 if (!add_dynamic_entry (DT_DEBUG, 0)) 2168 return FALSE; 2169 } 2170 2171 if (htab->elf.splt->size != 0) 2172 { 2173 if (!add_dynamic_entry (DT_PLTGOT, 0) 2174 || !add_dynamic_entry (DT_PLTRELSZ, 0) 2175 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 2176 || !add_dynamic_entry (DT_JMPREL, 0)) 2177 return FALSE; 2178 } 2179 2180 if (relocs) 2181 { 2182 if (!add_dynamic_entry (DT_RELA, 0) 2183 || !add_dynamic_entry (DT_RELASZ, 0) 2184 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) 2185 return FALSE; 2186 2187 /* If any dynamic relocs apply to a read-only section, 2188 then we need a DT_TEXTREL entry. */ 2189 if ((info->flags & DF_TEXTREL) == 0) 2190 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, 2191 info); 2192 2193 if ((info->flags & DF_TEXTREL) != 0) 2194 { 2195 if (!add_dynamic_entry (DT_TEXTREL, 0)) 2196 return FALSE; 2197 } 2198 } 2199 } 2200 #undef add_dynamic_entry 2201 2202 return TRUE; 2203 } 2204 2205 /* Return the base VMA address which should be subtracted from real addresses 2206 when resolving @dtpoff relocation. 2207 This is PT_TLS segment p_vaddr. */ 2208 2209 static bfd_vma 2210 dtpoff_base (struct bfd_link_info *info) 2211 { 2212 /* If tls_sec is NULL, we should have signalled an error already. */ 2213 if (elf_hash_table (info)->tls_sec == NULL) 2214 return 0; 2215 return elf_hash_table (info)->tls_sec->vma; 2216 } 2217 2218 /* Return the relocation value for @tpoff relocation 2219 if STT_TLS virtual address is ADDRESS. */ 2220 2221 static bfd_vma 2222 tpoff (struct bfd_link_info *info, bfd_vma address) 2223 { 2224 struct elf_link_hash_table *htab = elf_hash_table (info); 2225 2226 /* If tls_sec is NULL, we should have signalled an error already. */ 2227 if (htab->tls_sec == NULL) 2228 return 0; 2229 return htab->tls_size + htab->tls_sec->vma - address; 2230 } 2231 2232 /* Complain if TLS instruction relocation is against an invalid 2233 instruction. */ 2234 2235 static void 2236 invalid_tls_insn (bfd *input_bfd, 2237 asection *input_section, 2238 Elf_Internal_Rela *rel) 2239 { 2240 reloc_howto_type *howto; 2241 2242 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info); 2243 (*_bfd_error_handler) 2244 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"), 2245 input_bfd, 2246 input_section, 2247 (long) rel->r_offset, 2248 howto->name); 2249 bfd_set_error (bfd_error_bad_value); 2250 } 2251 2252 /* Relocate a 390 ELF section. */ 2253 2254 static bfd_boolean 2255 elf_s390_relocate_section (bfd *output_bfd, 2256 struct bfd_link_info *info, 2257 bfd *input_bfd, 2258 asection *input_section, 2259 bfd_byte *contents, 2260 Elf_Internal_Rela *relocs, 2261 Elf_Internal_Sym *local_syms, 2262 asection **local_sections) 2263 { 2264 struct elf_s390_link_hash_table *htab; 2265 Elf_Internal_Shdr *symtab_hdr; 2266 struct elf_link_hash_entry **sym_hashes; 2267 bfd_vma *local_got_offsets; 2268 Elf_Internal_Rela *rel; 2269 Elf_Internal_Rela *relend; 2270 2271 BFD_ASSERT (is_s390_elf (input_bfd)); 2272 2273 htab = elf_s390_hash_table (info); 2274 if (htab == NULL) 2275 return FALSE; 2276 2277 symtab_hdr = &elf_symtab_hdr (input_bfd); 2278 sym_hashes = elf_sym_hashes (input_bfd); 2279 local_got_offsets = elf_local_got_offsets (input_bfd); 2280 2281 rel = relocs; 2282 relend = relocs + input_section->reloc_count; 2283 for (; rel < relend; rel++) 2284 { 2285 unsigned int r_type; 2286 reloc_howto_type *howto; 2287 unsigned long r_symndx; 2288 struct elf_link_hash_entry *h; 2289 Elf_Internal_Sym *sym; 2290 asection *sec; 2291 bfd_vma off; 2292 bfd_vma relocation; 2293 bfd_boolean unresolved_reloc; 2294 bfd_reloc_status_type r; 2295 int tls_type; 2296 asection *base_got = htab->elf.sgot; 2297 2298 r_type = ELF64_R_TYPE (rel->r_info); 2299 if (r_type == (int) R_390_GNU_VTINHERIT 2300 || r_type == (int) R_390_GNU_VTENTRY) 2301 continue; 2302 if (r_type >= (int) R_390_max) 2303 { 2304 bfd_set_error (bfd_error_bad_value); 2305 return FALSE; 2306 } 2307 2308 howto = elf_howto_table + r_type; 2309 r_symndx = ELF64_R_SYM (rel->r_info); 2310 2311 h = NULL; 2312 sym = NULL; 2313 sec = NULL; 2314 unresolved_reloc = FALSE; 2315 if (r_symndx < symtab_hdr->sh_info) 2316 { 2317 sym = local_syms + r_symndx; 2318 sec = local_sections[r_symndx]; 2319 2320 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 2321 { 2322 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd); 2323 if (local_plt == NULL) 2324 return FALSE; 2325 2326 /* Address of the PLT slot. */ 2327 relocation = (htab->elf.iplt->output_section->vma 2328 + htab->elf.iplt->output_offset 2329 + local_plt[r_symndx].plt.offset); 2330 2331 switch (r_type) 2332 { 2333 case R_390_PLTOFF16: 2334 case R_390_PLTOFF32: 2335 case R_390_PLTOFF64: 2336 relocation -= htab->elf.sgot->output_section->vma; 2337 break; 2338 case R_390_GOTPLT12: 2339 case R_390_GOTPLT16: 2340 case R_390_GOTPLT20: 2341 case R_390_GOTPLT32: 2342 case R_390_GOTPLT64: 2343 case R_390_GOTPLTENT: 2344 case R_390_GOT12: 2345 case R_390_GOT16: 2346 case R_390_GOT20: 2347 case R_390_GOT32: 2348 case R_390_GOT64: 2349 case R_390_GOTENT: 2350 { 2351 /* Write the PLT slot address into the GOT slot. */ 2352 bfd_put_64 (output_bfd, relocation, 2353 htab->elf.sgot->contents + 2354 local_got_offsets[r_symndx]); 2355 relocation = (local_got_offsets[r_symndx] + 2356 htab->elf.sgot->output_offset); 2357 2358 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) 2359 relocation += htab->elf.sgot->output_section->vma; 2360 break; 2361 } 2362 default: 2363 break; 2364 } 2365 /* The output section is needed later in 2366 finish_dynamic_section when creating the dynamic 2367 relocation. */ 2368 local_plt[r_symndx].sec = sec; 2369 goto do_relocation; 2370 } 2371 else 2372 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2373 } 2374 else 2375 { 2376 bfd_boolean warned ATTRIBUTE_UNUSED; 2377 bfd_boolean ignored ATTRIBUTE_UNUSED; 2378 2379 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 2380 r_symndx, symtab_hdr, sym_hashes, 2381 h, sec, relocation, 2382 unresolved_reloc, warned, ignored); 2383 } 2384 2385 if (sec != NULL && discarded_section (sec)) 2386 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2387 rel, 1, relend, howto, 0, contents); 2388 2389 if (info->relocatable) 2390 continue; 2391 2392 switch (r_type) 2393 { 2394 case R_390_GOTPLT12: 2395 case R_390_GOTPLT16: 2396 case R_390_GOTPLT20: 2397 case R_390_GOTPLT32: 2398 case R_390_GOTPLT64: 2399 case R_390_GOTPLTENT: 2400 /* There are three cases for a GOTPLT relocation. 1) The 2401 relocation is against the jump slot entry of a plt that 2402 will get emitted to the output file. 2) The relocation 2403 is against the jump slot of a plt entry that has been 2404 removed. elf_s390_adjust_gotplt has created a GOT entry 2405 as replacement. 3) The relocation is against a local symbol. 2406 Cases 2) and 3) are the same as the GOT relocation code 2407 so we just have to test for case 1 and fall through for 2408 the other two. */ 2409 if (h != NULL && h->plt.offset != (bfd_vma) -1) 2410 { 2411 bfd_vma plt_index; 2412 2413 if (s390_is_ifunc_symbol_p (h)) 2414 { 2415 plt_index = h->plt.offset / PLT_ENTRY_SIZE; 2416 relocation = (plt_index * GOT_ENTRY_SIZE + 2417 htab->elf.igotplt->output_offset); 2418 if (r_type == R_390_GOTPLTENT) 2419 relocation += htab->elf.igotplt->output_section->vma; 2420 } 2421 else 2422 { 2423 /* Calc. index no. 2424 Current offset - size first entry / entry size. */ 2425 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / 2426 PLT_ENTRY_SIZE; 2427 2428 /* Offset in GOT is PLT index plus GOT headers(3) 2429 times 4, addr & GOT addr. */ 2430 relocation = (plt_index + 3) * GOT_ENTRY_SIZE; 2431 if (r_type == R_390_GOTPLTENT) 2432 relocation += htab->elf.sgot->output_section->vma; 2433 } 2434 unresolved_reloc = FALSE; 2435 break; 2436 } 2437 /* Fall through. */ 2438 2439 case R_390_GOT12: 2440 case R_390_GOT16: 2441 case R_390_GOT20: 2442 case R_390_GOT32: 2443 case R_390_GOT64: 2444 case R_390_GOTENT: 2445 /* Relocation is to the entry for this symbol in the global 2446 offset table. */ 2447 if (base_got == NULL) 2448 abort (); 2449 2450 if (h != NULL) 2451 { 2452 bfd_boolean dyn; 2453 2454 off = h->got.offset; 2455 dyn = htab->elf.dynamic_sections_created; 2456 2457 if (s390_is_ifunc_symbol_p (h)) 2458 { 2459 BFD_ASSERT (h->plt.offset != (bfd_vma) -1); 2460 if (off == (bfd_vma)-1) 2461 { 2462 /* No explicit GOT usage so redirect to the 2463 got.iplt slot. */ 2464 base_got = htab->elf.igotplt; 2465 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE; 2466 } 2467 else 2468 { 2469 /* Explicit GOT slots must contain the address 2470 of the PLT slot. This will be handled in 2471 finish_dynamic_symbol. */ 2472 } 2473 } 2474 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 2475 || (info->shared 2476 && SYMBOL_REFERENCES_LOCAL (info, h)) 2477 || (ELF_ST_VISIBILITY (h->other) 2478 && h->root.type == bfd_link_hash_undefweak)) 2479 { 2480 /* This is actually a static link, or it is a 2481 -Bsymbolic link and the symbol is defined 2482 locally, or the symbol was forced to be local 2483 because of a version file. We must initialize 2484 this entry in the global offset table. Since the 2485 offset must always be a multiple of 2, we use the 2486 least significant bit to record whether we have 2487 initialized it already. 2488 2489 When doing a dynamic link, we create a .rel.got 2490 relocation entry to initialize the value. This 2491 is done in the finish_dynamic_symbol routine. */ 2492 if ((off & 1) != 0) 2493 off &= ~1; 2494 else 2495 { 2496 bfd_put_64 (output_bfd, relocation, 2497 base_got->contents + off); 2498 h->got.offset |= 1; 2499 } 2500 2501 if ((h->def_regular 2502 && info->shared 2503 && SYMBOL_REFERENCES_LOCAL (info, h)) 2504 /* lgrl rx,sym@GOTENT -> larl rx, sym */ 2505 && ((r_type == R_390_GOTENT 2506 && (bfd_get_16 (input_bfd, 2507 contents + rel->r_offset - 2) 2508 & 0xff0f) == 0xc408) 2509 /* lg rx, sym@GOT(r12) -> larl rx, sym */ 2510 || (r_type == R_390_GOT20 2511 && (bfd_get_32 (input_bfd, 2512 contents + rel->r_offset - 2) 2513 & 0xff00f000) == 0xe300c000 2514 && bfd_get_8 (input_bfd, 2515 contents + rel->r_offset + 3) == 0x04))) 2516 2517 { 2518 unsigned short new_insn = 2519 (0xc000 | (bfd_get_8 (input_bfd, 2520 contents + rel->r_offset - 1) & 0xf0)); 2521 bfd_put_16 (output_bfd, new_insn, 2522 contents + rel->r_offset - 2); 2523 r_type = R_390_PC32DBL; 2524 rel->r_addend = 2; 2525 howto = elf_howto_table + r_type; 2526 relocation = h->root.u.def.value 2527 + h->root.u.def.section->output_section->vma 2528 + h->root.u.def.section->output_offset; 2529 goto do_relocation; 2530 } 2531 } 2532 else 2533 unresolved_reloc = FALSE; 2534 } 2535 else 2536 { 2537 if (local_got_offsets == NULL) 2538 abort (); 2539 2540 off = local_got_offsets[r_symndx]; 2541 2542 /* The offset must always be a multiple of 8. We use 2543 the least significant bit to record whether we have 2544 already generated the necessary reloc. */ 2545 if ((off & 1) != 0) 2546 off &= ~1; 2547 else 2548 { 2549 bfd_put_64 (output_bfd, relocation, 2550 htab->elf.sgot->contents + off); 2551 2552 if (info->shared) 2553 { 2554 asection *s; 2555 Elf_Internal_Rela outrel; 2556 bfd_byte *loc; 2557 2558 s = htab->elf.srelgot; 2559 if (s == NULL) 2560 abort (); 2561 2562 outrel.r_offset = (htab->elf.sgot->output_section->vma 2563 + htab->elf.sgot->output_offset 2564 + off); 2565 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 2566 outrel.r_addend = relocation; 2567 loc = s->contents; 2568 loc += s->reloc_count++ * sizeof (Elf64_External_Rela); 2569 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2570 } 2571 2572 local_got_offsets[r_symndx] |= 1; 2573 } 2574 } 2575 2576 if (off >= (bfd_vma) -2) 2577 abort (); 2578 2579 relocation = base_got->output_offset + off; 2580 2581 /* For @GOTENT the relocation is against the offset between 2582 the instruction and the symbols entry in the GOT and not 2583 between the start of the GOT and the symbols entry. We 2584 add the vma of the GOT to get the correct value. */ 2585 if ( r_type == R_390_GOTENT 2586 || r_type == R_390_GOTPLTENT) 2587 relocation += base_got->output_section->vma; 2588 2589 break; 2590 2591 case R_390_GOTOFF16: 2592 case R_390_GOTOFF32: 2593 case R_390_GOTOFF64: 2594 /* Relocation is relative to the start of the global offset 2595 table. */ 2596 2597 /* Note that sgot->output_offset is not involved in this 2598 calculation. We always want the start of .got. If we 2599 defined _GLOBAL_OFFSET_TABLE in a different way, as is 2600 permitted by the ABI, we might have to change this 2601 calculation. */ 2602 relocation -= htab->elf.sgot->output_section->vma; 2603 break; 2604 2605 case R_390_GOTPC: 2606 case R_390_GOTPCDBL: 2607 /* Use global offset table as symbol value. */ 2608 relocation = htab->elf.sgot->output_section->vma; 2609 unresolved_reloc = FALSE; 2610 break; 2611 2612 case R_390_PLT12DBL: 2613 case R_390_PLT16DBL: 2614 case R_390_PLT24DBL: 2615 case R_390_PLT32: 2616 case R_390_PLT32DBL: 2617 case R_390_PLT64: 2618 /* Relocation is to the entry for this symbol in the 2619 procedure linkage table. */ 2620 2621 /* Resolve a PLT32 reloc against a local symbol directly, 2622 without using the procedure linkage table. */ 2623 if (h == NULL) 2624 break; 2625 2626 if (h->plt.offset == (bfd_vma) -1 2627 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) 2628 { 2629 /* We didn't make a PLT entry for this symbol. This 2630 happens when statically linking PIC code, or when 2631 using -Bsymbolic. */ 2632 break; 2633 } 2634 if (s390_is_ifunc_symbol_p (h)) 2635 relocation = (htab->elf.iplt->output_section->vma 2636 + htab->elf.iplt->output_offset 2637 + h->plt.offset); 2638 else 2639 relocation = (htab->elf.splt->output_section->vma 2640 + htab->elf.splt->output_offset 2641 + h->plt.offset); 2642 unresolved_reloc = FALSE; 2643 break; 2644 2645 case R_390_PLTOFF16: 2646 case R_390_PLTOFF32: 2647 case R_390_PLTOFF64: 2648 /* Relocation is to the entry for this symbol in the 2649 procedure linkage table relative to the start of the GOT. */ 2650 2651 /* For local symbols or if we didn't make a PLT entry for 2652 this symbol resolve the symbol directly. */ 2653 if (h == NULL 2654 || h->plt.offset == (bfd_vma) -1 2655 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) 2656 { 2657 relocation -= htab->elf.sgot->output_section->vma; 2658 break; 2659 } 2660 2661 if (s390_is_ifunc_symbol_p (h)) 2662 relocation = (htab->elf.iplt->output_section->vma 2663 + htab->elf.iplt->output_offset 2664 + h->plt.offset 2665 - htab->elf.sgot->output_section->vma); 2666 else 2667 relocation = (htab->elf.splt->output_section->vma 2668 + htab->elf.splt->output_offset 2669 + h->plt.offset 2670 - htab->elf.sgot->output_section->vma); 2671 unresolved_reloc = FALSE; 2672 break; 2673 2674 case R_390_8: 2675 case R_390_16: 2676 case R_390_32: 2677 case R_390_64: 2678 case R_390_PC16: 2679 case R_390_PC12DBL: 2680 case R_390_PC16DBL: 2681 case R_390_PC24DBL: 2682 case R_390_PC32: 2683 case R_390_PC32DBL: 2684 case R_390_PC64: 2685 2686 if (h != NULL 2687 && s390_is_ifunc_symbol_p (h) 2688 && h->def_regular) 2689 { 2690 if (!info->shared || !h->non_got_ref) 2691 { 2692 /* For a non-shared object STT_GNU_IFUNC symbol must 2693 go through PLT. */ 2694 relocation = (htab->elf.iplt->output_section->vma 2695 + htab->elf.iplt->output_offset 2696 + h ->plt.offset); 2697 goto do_relocation; 2698 } 2699 else 2700 { 2701 /* For shared objects a runtime relocation is needed. */ 2702 2703 Elf_Internal_Rela outrel; 2704 asection *sreloc; 2705 2706 /* Need a dynamic relocation to get the real function 2707 address. */ 2708 outrel.r_offset = _bfd_elf_section_offset (output_bfd, 2709 info, 2710 input_section, 2711 rel->r_offset); 2712 if (outrel.r_offset == (bfd_vma) -1 2713 || outrel.r_offset == (bfd_vma) -2) 2714 abort (); 2715 2716 outrel.r_offset += (input_section->output_section->vma 2717 + input_section->output_offset); 2718 2719 if (h->dynindx == -1 2720 || h->forced_local 2721 || info->executable) 2722 { 2723 /* This symbol is resolved locally. */ 2724 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE); 2725 outrel.r_addend = (h->root.u.def.value 2726 + h->root.u.def.section->output_section->vma 2727 + h->root.u.def.section->output_offset); 2728 } 2729 else 2730 { 2731 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); 2732 outrel.r_addend = 0; 2733 } 2734 2735 sreloc = htab->elf.irelifunc; 2736 elf_append_rela (output_bfd, sreloc, &outrel); 2737 2738 /* If this reloc is against an external symbol, we 2739 do not want to fiddle with the addend. Otherwise, 2740 we need to include the symbol value so that it 2741 becomes an addend for the dynamic reloc. For an 2742 internal symbol, we have updated addend. */ 2743 continue; 2744 } 2745 } 2746 2747 if ((input_section->flags & SEC_ALLOC) == 0) 2748 break; 2749 2750 if ((info->shared 2751 && (h == NULL 2752 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 2753 || h->root.type != bfd_link_hash_undefweak) 2754 && ((r_type != R_390_PC16 2755 && r_type != R_390_PC12DBL 2756 && r_type != R_390_PC16DBL 2757 && r_type != R_390_PC24DBL 2758 && r_type != R_390_PC32 2759 && r_type != R_390_PC32DBL 2760 && r_type != R_390_PC64) 2761 || !SYMBOL_CALLS_LOCAL (info, h))) 2762 || (ELIMINATE_COPY_RELOCS 2763 && !info->shared 2764 && h != NULL 2765 && h->dynindx != -1 2766 && !h->non_got_ref 2767 && ((h->def_dynamic 2768 && !h->def_regular) 2769 || h->root.type == bfd_link_hash_undefweak 2770 || h->root.type == bfd_link_hash_undefined))) 2771 { 2772 Elf_Internal_Rela outrel; 2773 bfd_boolean skip, relocate; 2774 asection *sreloc; 2775 bfd_byte *loc; 2776 2777 /* When generating a shared object, these relocations 2778 are copied into the output file to be resolved at run 2779 time. */ 2780 skip = FALSE; 2781 relocate = FALSE; 2782 2783 outrel.r_offset = 2784 _bfd_elf_section_offset (output_bfd, info, input_section, 2785 rel->r_offset); 2786 if (outrel.r_offset == (bfd_vma) -1) 2787 skip = TRUE; 2788 else if (outrel.r_offset == (bfd_vma) -2) 2789 skip = TRUE, relocate = TRUE; 2790 2791 outrel.r_offset += (input_section->output_section->vma 2792 + input_section->output_offset); 2793 2794 if (skip) 2795 memset (&outrel, 0, sizeof outrel); 2796 else if (h != NULL 2797 && h->dynindx != -1 2798 && (r_type == R_390_PC16 2799 || r_type == R_390_PC12DBL 2800 || r_type == R_390_PC16DBL 2801 || r_type == R_390_PC24DBL 2802 || r_type == R_390_PC32 2803 || r_type == R_390_PC32DBL 2804 || r_type == R_390_PC64 2805 || !info->shared 2806 || !SYMBOLIC_BIND (info, h) 2807 || !h->def_regular)) 2808 { 2809 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); 2810 outrel.r_addend = rel->r_addend; 2811 } 2812 else 2813 { 2814 /* This symbol is local, or marked to become local. */ 2815 outrel.r_addend = relocation + rel->r_addend; 2816 if (r_type == R_390_64) 2817 { 2818 relocate = TRUE; 2819 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 2820 } 2821 else 2822 { 2823 long sindx; 2824 2825 if (bfd_is_abs_section (sec)) 2826 sindx = 0; 2827 else if (sec == NULL || sec->owner == NULL) 2828 { 2829 bfd_set_error(bfd_error_bad_value); 2830 return FALSE; 2831 } 2832 else 2833 { 2834 asection *osec; 2835 2836 osec = sec->output_section; 2837 sindx = elf_section_data (osec)->dynindx; 2838 2839 if (sindx == 0) 2840 { 2841 osec = htab->elf.text_index_section; 2842 sindx = elf_section_data (osec)->dynindx; 2843 } 2844 BFD_ASSERT (sindx != 0); 2845 2846 /* We are turning this relocation into one 2847 against a section symbol, so subtract out 2848 the output section's address but not the 2849 offset of the input section in the output 2850 section. */ 2851 outrel.r_addend -= osec->vma; 2852 } 2853 outrel.r_info = ELF64_R_INFO (sindx, r_type); 2854 } 2855 } 2856 2857 sreloc = elf_section_data (input_section)->sreloc; 2858 if (sreloc == NULL) 2859 abort (); 2860 2861 loc = sreloc->contents; 2862 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 2863 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2864 2865 /* If this reloc is against an external symbol, we do 2866 not want to fiddle with the addend. Otherwise, we 2867 need to include the symbol value so that it becomes 2868 an addend for the dynamic reloc. */ 2869 if (! relocate) 2870 continue; 2871 } 2872 2873 break; 2874 2875 /* Relocations for tls literal pool entries. */ 2876 case R_390_TLS_IE64: 2877 if (info->shared) 2878 { 2879 Elf_Internal_Rela outrel; 2880 asection *sreloc; 2881 bfd_byte *loc; 2882 2883 outrel.r_offset = rel->r_offset 2884 + input_section->output_section->vma 2885 + input_section->output_offset; 2886 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 2887 sreloc = elf_section_data (input_section)->sreloc; 2888 if (sreloc == NULL) 2889 abort (); 2890 loc = sreloc->contents; 2891 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 2892 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc); 2893 } 2894 /* Fall through. */ 2895 2896 case R_390_TLS_GD64: 2897 case R_390_TLS_GOTIE64: 2898 r_type = elf_s390_tls_transition (info, r_type, h == NULL); 2899 tls_type = GOT_UNKNOWN; 2900 if (h == NULL && local_got_offsets) 2901 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 2902 else if (h != NULL) 2903 { 2904 tls_type = elf_s390_hash_entry(h)->tls_type; 2905 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) 2906 r_type = R_390_TLS_LE64; 2907 } 2908 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE) 2909 r_type = R_390_TLS_IE64; 2910 2911 if (r_type == R_390_TLS_LE64) 2912 { 2913 /* This relocation gets optimized away by the local exec 2914 access optimization. */ 2915 BFD_ASSERT (! unresolved_reloc); 2916 bfd_put_64 (output_bfd, -tpoff (info, relocation), 2917 contents + rel->r_offset); 2918 continue; 2919 } 2920 2921 if (htab->elf.sgot == NULL) 2922 abort (); 2923 2924 if (h != NULL) 2925 off = h->got.offset; 2926 else 2927 { 2928 if (local_got_offsets == NULL) 2929 abort (); 2930 2931 off = local_got_offsets[r_symndx]; 2932 } 2933 2934 emit_tls_relocs: 2935 2936 if ((off & 1) != 0) 2937 off &= ~1; 2938 else 2939 { 2940 Elf_Internal_Rela outrel; 2941 bfd_byte *loc; 2942 int dr_type, indx; 2943 2944 if (htab->elf.srelgot == NULL) 2945 abort (); 2946 2947 outrel.r_offset = (htab->elf.sgot->output_section->vma 2948 + htab->elf.sgot->output_offset + off); 2949 2950 indx = h && h->dynindx != -1 ? h->dynindx : 0; 2951 if (r_type == R_390_TLS_GD64) 2952 dr_type = R_390_TLS_DTPMOD; 2953 else 2954 dr_type = R_390_TLS_TPOFF; 2955 if (dr_type == R_390_TLS_TPOFF && indx == 0) 2956 outrel.r_addend = relocation - dtpoff_base (info); 2957 else 2958 outrel.r_addend = 0; 2959 outrel.r_info = ELF64_R_INFO (indx, dr_type); 2960 loc = htab->elf.srelgot->contents; 2961 loc += htab->elf.srelgot->reloc_count++ 2962 * sizeof (Elf64_External_Rela); 2963 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2964 2965 if (r_type == R_390_TLS_GD64) 2966 { 2967 if (indx == 0) 2968 { 2969 BFD_ASSERT (! unresolved_reloc); 2970 bfd_put_64 (output_bfd, 2971 relocation - dtpoff_base (info), 2972 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); 2973 } 2974 else 2975 { 2976 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF); 2977 outrel.r_offset += GOT_ENTRY_SIZE; 2978 outrel.r_addend = 0; 2979 htab->elf.srelgot->reloc_count++; 2980 loc += sizeof (Elf64_External_Rela); 2981 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2982 } 2983 } 2984 2985 if (h != NULL) 2986 h->got.offset |= 1; 2987 else 2988 local_got_offsets[r_symndx] |= 1; 2989 } 2990 2991 if (off >= (bfd_vma) -2) 2992 abort (); 2993 if (r_type == ELF64_R_TYPE (rel->r_info)) 2994 { 2995 relocation = htab->elf.sgot->output_offset + off; 2996 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT) 2997 relocation += htab->elf.sgot->output_section->vma; 2998 unresolved_reloc = FALSE; 2999 } 3000 else 3001 { 3002 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off, 3003 contents + rel->r_offset); 3004 continue; 3005 } 3006 break; 3007 3008 case R_390_TLS_GOTIE12: 3009 case R_390_TLS_GOTIE20: 3010 case R_390_TLS_IEENT: 3011 if (h == NULL) 3012 { 3013 if (local_got_offsets == NULL) 3014 abort(); 3015 off = local_got_offsets[r_symndx]; 3016 if (info->shared) 3017 goto emit_tls_relocs; 3018 } 3019 else 3020 { 3021 off = h->got.offset; 3022 tls_type = elf_s390_hash_entry(h)->tls_type; 3023 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) 3024 goto emit_tls_relocs; 3025 } 3026 3027 if (htab->elf.sgot == NULL) 3028 abort (); 3029 3030 BFD_ASSERT (! unresolved_reloc); 3031 bfd_put_64 (output_bfd, -tpoff (info, relocation), 3032 htab->elf.sgot->contents + off); 3033 relocation = htab->elf.sgot->output_offset + off; 3034 if (r_type == R_390_TLS_IEENT) 3035 relocation += htab->elf.sgot->output_section->vma; 3036 unresolved_reloc = FALSE; 3037 break; 3038 3039 case R_390_TLS_LDM64: 3040 if (! info->shared) 3041 /* The literal pool entry this relocation refers to gets ignored 3042 by the optimized code of the local exec model. Do nothing 3043 and the value will turn out zero. */ 3044 continue; 3045 3046 if (htab->elf.sgot == NULL) 3047 abort (); 3048 3049 off = htab->tls_ldm_got.offset; 3050 if (off & 1) 3051 off &= ~1; 3052 else 3053 { 3054 Elf_Internal_Rela outrel; 3055 bfd_byte *loc; 3056 3057 if (htab->elf.srelgot == NULL) 3058 abort (); 3059 3060 outrel.r_offset = (htab->elf.sgot->output_section->vma 3061 + htab->elf.sgot->output_offset + off); 3062 3063 bfd_put_64 (output_bfd, 0, 3064 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); 3065 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD); 3066 outrel.r_addend = 0; 3067 loc = htab->elf.srelgot->contents; 3068 loc += htab->elf.srelgot->reloc_count++ 3069 * sizeof (Elf64_External_Rela); 3070 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 3071 htab->tls_ldm_got.offset |= 1; 3072 } 3073 relocation = htab->elf.sgot->output_offset + off; 3074 unresolved_reloc = FALSE; 3075 break; 3076 3077 case R_390_TLS_LE64: 3078 if (info->shared) 3079 { 3080 /* Linking a shared library with non-fpic code requires 3081 a R_390_TLS_TPOFF relocation. */ 3082 Elf_Internal_Rela outrel; 3083 asection *sreloc; 3084 bfd_byte *loc; 3085 int indx; 3086 3087 outrel.r_offset = rel->r_offset 3088 + input_section->output_section->vma 3089 + input_section->output_offset; 3090 if (h != NULL && h->dynindx != -1) 3091 indx = h->dynindx; 3092 else 3093 indx = 0; 3094 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF); 3095 if (indx == 0) 3096 outrel.r_addend = relocation - dtpoff_base (info); 3097 else 3098 outrel.r_addend = 0; 3099 sreloc = elf_section_data (input_section)->sreloc; 3100 if (sreloc == NULL) 3101 abort (); 3102 loc = sreloc->contents; 3103 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 3104 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 3105 } 3106 else 3107 { 3108 BFD_ASSERT (! unresolved_reloc); 3109 bfd_put_64 (output_bfd, -tpoff (info, relocation), 3110 contents + rel->r_offset); 3111 } 3112 continue; 3113 3114 case R_390_TLS_LDO64: 3115 if (info->shared || (input_section->flags & SEC_DEBUGGING)) 3116 relocation -= dtpoff_base (info); 3117 else 3118 /* When converting LDO to LE, we must negate. */ 3119 relocation = -tpoff (info, relocation); 3120 break; 3121 3122 /* Relocations for tls instructions. */ 3123 case R_390_TLS_LOAD: 3124 case R_390_TLS_GDCALL: 3125 case R_390_TLS_LDCALL: 3126 tls_type = GOT_UNKNOWN; 3127 if (h == NULL && local_got_offsets) 3128 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 3129 else if (h != NULL) 3130 tls_type = elf_s390_hash_entry(h)->tls_type; 3131 3132 if (tls_type == GOT_TLS_GD) 3133 continue; 3134 3135 if (r_type == R_390_TLS_LOAD) 3136 { 3137 if (!info->shared && (h == NULL || h->dynindx == -1)) 3138 { 3139 /* IE->LE transition. Four valid cases: 3140 lg %rx,(0,%ry) -> sllg %rx,%ry,0 3141 lg %rx,(%ry,0) -> sllg %rx,%ry,0 3142 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0 3143 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */ 3144 unsigned int insn0, insn1, ry; 3145 3146 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); 3147 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); 3148 if (insn1 != 0x0004) 3149 invalid_tls_insn (input_bfd, input_section, rel); 3150 ry = 0; 3151 if ((insn0 & 0xff00f000) == 0xe3000000) 3152 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */ 3153 ry = (insn0 & 0x000f0000); 3154 else if ((insn0 & 0xff0f0000) == 0xe3000000) 3155 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */ 3156 ry = (insn0 & 0x0000f000) << 4; 3157 else if ((insn0 & 0xff00f000) == 0xe300c000) 3158 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */ 3159 ry = (insn0 & 0x000f0000); 3160 else if ((insn0 & 0xff0f0000) == 0xe30c0000) 3161 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */ 3162 ry = (insn0 & 0x0000f000) << 4; 3163 else 3164 invalid_tls_insn (input_bfd, input_section, rel); 3165 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry; 3166 insn1 = 0x000d; 3167 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); 3168 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); 3169 } 3170 } 3171 else if (r_type == R_390_TLS_GDCALL) 3172 { 3173 unsigned int insn0, insn1; 3174 3175 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); 3176 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); 3177 if ((insn0 & 0xffff0000) != 0xc0e50000) 3178 invalid_tls_insn (input_bfd, input_section, rel); 3179 if (!info->shared && (h == NULL || h->dynindx == -1)) 3180 { 3181 /* GD->LE transition. 3182 brasl %r14,__tls_get_addr@plt -> brcl 0,. */ 3183 insn0 = 0xc0040000; 3184 insn1 = 0x0000; 3185 } 3186 else 3187 { 3188 /* GD->IE transition. 3189 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */ 3190 insn0 = 0xe322c000; 3191 insn1 = 0x0004; 3192 } 3193 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); 3194 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); 3195 } 3196 else if (r_type == R_390_TLS_LDCALL) 3197 { 3198 if (!info->shared) 3199 { 3200 unsigned int insn0, insn1; 3201 3202 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); 3203 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); 3204 if ((insn0 & 0xffff0000) != 0xc0e50000) 3205 invalid_tls_insn (input_bfd, input_section, rel); 3206 /* LD->LE transition. 3207 brasl %r14,__tls_get_addr@plt -> brcl 0,. */ 3208 insn0 = 0xc0040000; 3209 insn1 = 0x0000; 3210 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); 3211 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); 3212 } 3213 } 3214 continue; 3215 3216 default: 3217 break; 3218 } 3219 3220 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections 3221 because such sections are not SEC_ALLOC and thus ld.so will 3222 not process them. */ 3223 if (unresolved_reloc 3224 && !((input_section->flags & SEC_DEBUGGING) != 0 3225 && h->def_dynamic) 3226 && _bfd_elf_section_offset (output_bfd, info, input_section, 3227 rel->r_offset) != (bfd_vma) -1) 3228 (*_bfd_error_handler) 3229 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), 3230 input_bfd, 3231 input_section, 3232 (long) rel->r_offset, 3233 howto->name, 3234 h->root.root.string); 3235 3236 do_relocation: 3237 3238 /* When applying a 24 bit reloc we need to start one byte 3239 earlier. Otherwise the 32 bit get/put bfd operations might 3240 access a byte after the actual section. */ 3241 if (r_type == R_390_PC24DBL 3242 || r_type == R_390_PLT24DBL) 3243 rel->r_offset--; 3244 3245 if (r_type == R_390_20 3246 || r_type == R_390_GOT20 3247 || r_type == R_390_GOTPLT20 3248 || r_type == R_390_TLS_GOTIE20) 3249 { 3250 relocation += rel->r_addend; 3251 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; 3252 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3253 contents, rel->r_offset, 3254 relocation, 0); 3255 } 3256 else 3257 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3258 contents, rel->r_offset, 3259 relocation, rel->r_addend); 3260 3261 if (r != bfd_reloc_ok) 3262 { 3263 const char *name; 3264 3265 if (h != NULL) 3266 name = h->root.root.string; 3267 else 3268 { 3269 name = bfd_elf_string_from_elf_section (input_bfd, 3270 symtab_hdr->sh_link, 3271 sym->st_name); 3272 if (name == NULL) 3273 return FALSE; 3274 if (*name == '\0') 3275 name = bfd_section_name (input_bfd, sec); 3276 } 3277 3278 if (r == bfd_reloc_overflow) 3279 { 3280 3281 if (! ((*info->callbacks->reloc_overflow) 3282 (info, (h ? &h->root : NULL), name, howto->name, 3283 (bfd_vma) 0, input_bfd, input_section, 3284 rel->r_offset))) 3285 return FALSE; 3286 } 3287 else 3288 { 3289 (*_bfd_error_handler) 3290 (_("%B(%A+0x%lx): reloc against `%s': error %d"), 3291 input_bfd, input_section, 3292 (long) rel->r_offset, name, (int) r); 3293 return FALSE; 3294 } 3295 } 3296 } 3297 3298 return TRUE; 3299 } 3300 3301 /* Generate the PLT slots together with the dynamic relocations needed 3302 for IFUNC symbols. */ 3303 3304 static void 3305 elf_s390_finish_ifunc_symbol (bfd *output_bfd, 3306 struct bfd_link_info *info, 3307 struct elf_link_hash_entry *h, 3308 struct elf_s390_link_hash_table *htab, 3309 bfd_vma plt_offset, 3310 bfd_vma resolver_address) 3311 { 3312 bfd_vma plt_index; 3313 bfd_vma got_offset; 3314 Elf_Internal_Rela rela; 3315 bfd_byte *loc; 3316 asection *plt, *gotplt, *relplt; 3317 3318 if (htab->elf.iplt == NULL 3319 || htab->elf.igotplt == NULL 3320 || htab->elf.irelplt == NULL) 3321 abort (); 3322 3323 /* Index of the PLT slot within iplt section. */ 3324 plt_index = plt_offset / PLT_ENTRY_SIZE; 3325 plt = htab->elf.iplt; 3326 /* Offset into the igot.plt section. */ 3327 got_offset = plt_index * GOT_ENTRY_SIZE; 3328 gotplt = htab->elf.igotplt; 3329 relplt = htab->elf.irelplt; 3330 3331 /* Fill in the blueprint of a PLT. */ 3332 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry, 3333 PLT_ENTRY_SIZE); 3334 3335 /* Fixup the relative address to the GOT entry */ 3336 bfd_put_32 (output_bfd, 3337 (gotplt->output_section->vma + 3338 gotplt->output_offset + got_offset 3339 - (plt->output_section->vma + 3340 plt->output_offset + 3341 plt_offset))/2, 3342 plt->contents + plt_offset + 2); 3343 /* Fixup the relative branch to PLT 0 */ 3344 bfd_put_32 (output_bfd, - (plt->output_offset + 3345 (PLT_ENTRY_SIZE * plt_index) + 22)/2, 3346 plt->contents + plt_offset + 24); 3347 /* Fixup offset into .rela.plt section. */ 3348 bfd_put_32 (output_bfd, relplt->output_offset + 3349 plt_index * sizeof (Elf64_External_Rela), 3350 plt->contents + plt_offset + 28); 3351 3352 /* Fill in the entry in the global offset table. 3353 Points to instruction after GOT offset. */ 3354 bfd_put_64 (output_bfd, 3355 (plt->output_section->vma 3356 + plt->output_offset 3357 + plt_offset 3358 + 14), 3359 gotplt->contents + got_offset); 3360 3361 /* Fill in the entry in the .rela.plt section. */ 3362 rela.r_offset = (gotplt->output_section->vma 3363 + gotplt->output_offset 3364 + got_offset); 3365 3366 if (!h 3367 || h->dynindx == -1 3368 || ((info->executable 3369 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 3370 && h->def_regular)) 3371 { 3372 /* The symbol can be locally resolved. */ 3373 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE); 3374 rela.r_addend = resolver_address; 3375 } 3376 else 3377 { 3378 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); 3379 rela.r_addend = 0; 3380 } 3381 3382 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela); 3383 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3384 } 3385 3386 3387 /* Finish up dynamic symbol handling. We set the contents of various 3388 dynamic sections here. */ 3389 3390 static bfd_boolean 3391 elf_s390_finish_dynamic_symbol (bfd *output_bfd, 3392 struct bfd_link_info *info, 3393 struct elf_link_hash_entry *h, 3394 Elf_Internal_Sym *sym) 3395 { 3396 struct elf_s390_link_hash_table *htab; 3397 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h; 3398 3399 htab = elf_s390_hash_table (info); 3400 if (htab == NULL) 3401 return FALSE; 3402 3403 if (h->plt.offset != (bfd_vma) -1) 3404 { 3405 bfd_vma plt_index; 3406 bfd_vma got_offset; 3407 Elf_Internal_Rela rela; 3408 bfd_byte *loc; 3409 3410 /* This symbol has an entry in the procedure linkage table. Set 3411 it up. */ 3412 if (s390_is_ifunc_symbol_p (h)) 3413 { 3414 /* If we can resolve the IFUNC symbol locally we generate an 3415 IRELATIVE reloc. */ 3416 elf_s390_finish_ifunc_symbol (output_bfd, info, h, htab, h->plt.offset, 3417 eh->ifunc_resolver_address + 3418 eh->ifunc_resolver_section->output_offset + 3419 eh->ifunc_resolver_section->output_section->vma); 3420 ; 3421 /* Fallthrough. Handling of explicit GOT slots of IFUNC 3422 symbols is below. */ 3423 } 3424 else 3425 { 3426 if (h->dynindx == -1 3427 || htab->elf.splt == NULL 3428 || htab->elf.sgotplt == NULL 3429 || htab->elf.srelplt == NULL) 3430 abort (); 3431 3432 /* Calc. index no. 3433 Current offset - size first entry / entry size. */ 3434 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; 3435 3436 /* Offset in GOT is PLT index plus GOT headers(3) times 8, 3437 addr & GOT addr. */ 3438 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; 3439 3440 /* Fill in the blueprint of a PLT. */ 3441 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry, 3442 PLT_ENTRY_SIZE); 3443 3444 /* Fixup the relative address to the GOT entry */ 3445 bfd_put_32 (output_bfd, 3446 (htab->elf.sgotplt->output_section->vma + 3447 htab->elf.sgotplt->output_offset + got_offset 3448 - (htab->elf.splt->output_section->vma + 3449 htab->elf.splt->output_offset + 3450 h->plt.offset))/2, 3451 htab->elf.splt->contents + h->plt.offset + 2); 3452 /* Fixup the relative branch to PLT 0 */ 3453 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE + 3454 (PLT_ENTRY_SIZE * plt_index) + 22)/2, 3455 htab->elf.splt->contents + h->plt.offset + 24); 3456 /* Fixup offset into .rela.plt section. */ 3457 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela), 3458 htab->elf.splt->contents + h->plt.offset + 28); 3459 3460 /* Fill in the entry in the global offset table. 3461 Points to instruction after GOT offset. */ 3462 bfd_put_64 (output_bfd, 3463 (htab->elf.splt->output_section->vma 3464 + htab->elf.splt->output_offset 3465 + h->plt.offset 3466 + 14), 3467 htab->elf.sgotplt->contents + got_offset); 3468 3469 /* Fill in the entry in the .rela.plt section. */ 3470 rela.r_offset = (htab->elf.sgotplt->output_section->vma 3471 + htab->elf.sgotplt->output_offset 3472 + got_offset); 3473 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); 3474 rela.r_addend = 0; 3475 loc = htab->elf.srelplt->contents + plt_index * 3476 sizeof (Elf64_External_Rela); 3477 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3478 3479 if (!h->def_regular) 3480 { 3481 /* Mark the symbol as undefined, rather than as defined in 3482 the .plt section. Leave the value alone. This is a clue 3483 for the dynamic linker, to make function pointer 3484 comparisons work between an application and shared 3485 library. */ 3486 sym->st_shndx = SHN_UNDEF; 3487 } 3488 } 3489 } 3490 3491 if (h->got.offset != (bfd_vma) -1 3492 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD 3493 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE 3494 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) 3495 { 3496 Elf_Internal_Rela rela; 3497 bfd_byte *loc; 3498 3499 /* This symbol has an entry in the global offset table. Set it 3500 up. */ 3501 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) 3502 abort (); 3503 3504 rela.r_offset = (htab->elf.sgot->output_section->vma 3505 + htab->elf.sgot->output_offset 3506 + (h->got.offset &~ (bfd_vma) 1)); 3507 3508 if (h->def_regular && s390_is_ifunc_symbol_p (h)) 3509 { 3510 if (info->shared) 3511 { 3512 /* An explicit GOT slot usage needs GLOB_DAT. If the 3513 symbol references local the implicit got.iplt slot 3514 will be used and the IRELATIVE reloc has been created 3515 above. */ 3516 goto do_glob_dat; 3517 } 3518 else 3519 { 3520 /* For non-shared objects explicit GOT slots must be 3521 filled with the PLT slot address for pointer 3522 equality reasons. */ 3523 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma 3524 + htab->elf.iplt->output_offset 3525 + h->plt.offset), 3526 htab->elf.sgot->contents + h->got.offset); 3527 return TRUE; 3528 } 3529 } 3530 else if (info->shared 3531 && SYMBOL_REFERENCES_LOCAL (info, h)) 3532 { 3533 /* If this is a static link, or it is a -Bsymbolic link and 3534 the symbol is defined locally or was forced to be local 3535 because of a version file, we just want to emit a 3536 RELATIVE reloc. The entry in the global offset table 3537 will already have been initialized in the 3538 relocate_section function. */ 3539 if (!h->def_regular) 3540 return FALSE; 3541 BFD_ASSERT((h->got.offset & 1) != 0); 3542 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 3543 rela.r_addend = (h->root.u.def.value 3544 + h->root.u.def.section->output_section->vma 3545 + h->root.u.def.section->output_offset); 3546 } 3547 else 3548 { 3549 BFD_ASSERT((h->got.offset & 1) == 0); 3550 do_glob_dat: 3551 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset); 3552 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT); 3553 rela.r_addend = 0; 3554 } 3555 3556 loc = htab->elf.srelgot->contents; 3557 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela); 3558 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3559 } 3560 3561 if (h->needs_copy) 3562 { 3563 Elf_Internal_Rela rela; 3564 bfd_byte *loc; 3565 3566 /* This symbols needs a copy reloc. Set it up. */ 3567 3568 if (h->dynindx == -1 3569 || (h->root.type != bfd_link_hash_defined 3570 && h->root.type != bfd_link_hash_defweak) 3571 || htab->srelbss == NULL) 3572 abort (); 3573 3574 rela.r_offset = (h->root.u.def.value 3575 + h->root.u.def.section->output_section->vma 3576 + h->root.u.def.section->output_offset); 3577 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY); 3578 rela.r_addend = 0; 3579 loc = htab->srelbss->contents; 3580 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); 3581 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3582 } 3583 3584 /* Mark some specially defined symbols as absolute. */ 3585 if (h == htab->elf.hdynamic 3586 || h == htab->elf.hgot 3587 || h == htab->elf.hplt) 3588 sym->st_shndx = SHN_ABS; 3589 3590 return TRUE; 3591 } 3592 3593 /* Used to decide how to sort relocs in an optimal manner for the 3594 dynamic linker, before writing them out. */ 3595 3596 static enum elf_reloc_type_class 3597 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 3598 const asection *rel_sec ATTRIBUTE_UNUSED, 3599 const Elf_Internal_Rela *rela) 3600 { 3601 switch ((int) ELF64_R_TYPE (rela->r_info)) 3602 { 3603 case R_390_RELATIVE: 3604 return reloc_class_relative; 3605 case R_390_JMP_SLOT: 3606 return reloc_class_plt; 3607 case R_390_COPY: 3608 return reloc_class_copy; 3609 default: 3610 return reloc_class_normal; 3611 } 3612 } 3613 3614 /* Finish up the dynamic sections. */ 3615 3616 static bfd_boolean 3617 elf_s390_finish_dynamic_sections (bfd *output_bfd, 3618 struct bfd_link_info *info) 3619 { 3620 struct elf_s390_link_hash_table *htab; 3621 bfd *dynobj; 3622 asection *sdyn; 3623 bfd *ibfd; 3624 unsigned int i; 3625 3626 htab = elf_s390_hash_table (info); 3627 if (htab == NULL) 3628 return FALSE; 3629 3630 dynobj = htab->elf.dynobj; 3631 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 3632 3633 if (htab->elf.dynamic_sections_created) 3634 { 3635 Elf64_External_Dyn *dyncon, *dynconend; 3636 3637 if (sdyn == NULL || htab->elf.sgot == NULL) 3638 abort (); 3639 3640 dyncon = (Elf64_External_Dyn *) sdyn->contents; 3641 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); 3642 for (; dyncon < dynconend; dyncon++) 3643 { 3644 Elf_Internal_Dyn dyn; 3645 asection *s; 3646 3647 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); 3648 3649 switch (dyn.d_tag) 3650 { 3651 default: 3652 continue; 3653 3654 case DT_PLTGOT: 3655 dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma; 3656 break; 3657 3658 case DT_JMPREL: 3659 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; 3660 break; 3661 3662 case DT_PLTRELSZ: 3663 s = htab->elf.srelplt->output_section; 3664 dyn.d_un.d_val = s->size; 3665 break; 3666 3667 case DT_RELASZ: 3668 /* The procedure linkage table relocs (DT_JMPREL) should 3669 not be included in the overall relocs (DT_RELA). 3670 Therefore, we override the DT_RELASZ entry here to 3671 make it not include the JMPREL relocs. Since the 3672 linker script arranges for .rela.plt to follow all 3673 other relocation sections, we don't have to worry 3674 about changing the DT_RELA entry. */ 3675 s = htab->elf.srelplt->output_section; 3676 dyn.d_un.d_val -= s->size; 3677 break; 3678 } 3679 3680 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); 3681 } 3682 3683 /* Fill in the special first entry in the procedure linkage table. */ 3684 if (htab->elf.splt && htab->elf.splt->size > 0) 3685 { 3686 /* fill in blueprint for plt 0 entry */ 3687 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry, 3688 PLT_FIRST_ENTRY_SIZE); 3689 /* Fixup relative address to start of GOT */ 3690 bfd_put_32 (output_bfd, 3691 (htab->elf.sgotplt->output_section->vma + 3692 htab->elf.sgotplt->output_offset 3693 - htab->elf.splt->output_section->vma - 6)/2, 3694 htab->elf.splt->contents + 8); 3695 } 3696 if (elf_section_data (htab->elf.splt->output_section) != NULL) 3697 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize 3698 = PLT_ENTRY_SIZE; 3699 } 3700 3701 if (htab->elf.sgotplt) 3702 { 3703 /* Fill in the first three entries in the global offset table. */ 3704 if (htab->elf.sgotplt->size > 0) 3705 { 3706 bfd_put_64 (output_bfd, 3707 (sdyn == NULL ? (bfd_vma) 0 3708 : sdyn->output_section->vma + sdyn->output_offset), 3709 htab->elf.sgotplt->contents); 3710 /* One entry for shared object struct ptr. */ 3711 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8); 3712 /* One entry for _dl_runtime_resolve. */ 3713 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 12); 3714 } 3715 3716 elf_section_data (htab->elf.sgot->output_section) 3717 ->this_hdr.sh_entsize = 8; 3718 } 3719 3720 /* Finish dynamic symbol for local IFUNC symbols. */ 3721 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 3722 { 3723 struct plt_entry *local_plt; 3724 Elf_Internal_Sym *isym; 3725 Elf_Internal_Shdr *symtab_hdr; 3726 3727 symtab_hdr = &elf_symtab_hdr (ibfd); 3728 3729 local_plt = elf_s390_local_plt (ibfd); 3730 if (local_plt != NULL) 3731 for (i = 0; i < symtab_hdr->sh_info; i++) 3732 { 3733 if (local_plt[i].plt.offset != (bfd_vma) -1) 3734 { 3735 asection *sec = local_plt[i].sec; 3736 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i); 3737 if (isym == NULL) 3738 return FALSE; 3739 3740 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 3741 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab, 3742 local_plt[i].plt.offset, 3743 isym->st_value 3744 + sec->output_section->vma 3745 + sec->output_offset); 3746 3747 } 3748 } 3749 } 3750 3751 return TRUE; 3752 } 3753 3754 /* Return address for Ith PLT stub in section PLT, for relocation REL 3755 or (bfd_vma) -1 if it should not be included. */ 3756 3757 static bfd_vma 3758 elf_s390_plt_sym_val (bfd_vma i, const asection *plt, 3759 const arelent *rel ATTRIBUTE_UNUSED) 3760 { 3761 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; 3762 } 3763 3764 /* Why was the hash table entry size definition changed from 3765 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and 3766 this is the only reason for the s390_elf64_size_info structure. */ 3767 3768 const struct elf_size_info s390_elf64_size_info = 3769 { 3770 sizeof (Elf64_External_Ehdr), 3771 sizeof (Elf64_External_Phdr), 3772 sizeof (Elf64_External_Shdr), 3773 sizeof (Elf64_External_Rel), 3774 sizeof (Elf64_External_Rela), 3775 sizeof (Elf64_External_Sym), 3776 sizeof (Elf64_External_Dyn), 3777 sizeof (Elf_External_Note), 3778 8, /* hash-table entry size. */ 3779 1, /* internal relocations per external relocations. */ 3780 64, /* arch_size. */ 3781 3, /* log_file_align. */ 3782 ELFCLASS64, EV_CURRENT, 3783 bfd_elf64_write_out_phdrs, 3784 bfd_elf64_write_shdrs_and_ehdr, 3785 bfd_elf64_checksum_contents, 3786 bfd_elf64_write_relocs, 3787 bfd_elf64_swap_symbol_in, 3788 bfd_elf64_swap_symbol_out, 3789 bfd_elf64_slurp_reloc_table, 3790 bfd_elf64_slurp_symbol_table, 3791 bfd_elf64_swap_dyn_in, 3792 bfd_elf64_swap_dyn_out, 3793 bfd_elf64_swap_reloc_in, 3794 bfd_elf64_swap_reloc_out, 3795 bfd_elf64_swap_reloca_in, 3796 bfd_elf64_swap_reloca_out 3797 }; 3798 3799 #define TARGET_BIG_SYM bfd_elf64_s390_vec 3800 #define TARGET_BIG_NAME "elf64-s390" 3801 #define ELF_ARCH bfd_arch_s390 3802 #define ELF_TARGET_ID S390_ELF_DATA 3803 #define ELF_MACHINE_CODE EM_S390 3804 #define ELF_MACHINE_ALT1 EM_S390_OLD 3805 #define ELF_MAXPAGESIZE 0x1000 3806 3807 #define elf_backend_size_info s390_elf64_size_info 3808 3809 #define elf_backend_can_gc_sections 1 3810 #define elf_backend_can_refcount 1 3811 #define elf_backend_want_got_plt 1 3812 #define elf_backend_plt_readonly 1 3813 #define elf_backend_want_plt_sym 0 3814 #define elf_backend_got_header_size 24 3815 #define elf_backend_rela_normal 1 3816 3817 #define elf_info_to_howto elf_s390_info_to_howto 3818 3819 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name 3820 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create 3821 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup 3822 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup 3823 3824 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol 3825 #define elf_backend_check_relocs elf_s390_check_relocs 3826 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol 3827 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections 3828 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections 3829 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol 3830 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook 3831 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook 3832 #define elf_backend_reloc_type_class elf_s390_reloc_type_class 3833 #define elf_backend_relocate_section elf_s390_relocate_section 3834 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections 3835 #define elf_backend_init_index_section _bfd_elf_init_1_index_section 3836 #define elf_backend_plt_sym_val elf_s390_plt_sym_val 3837 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook 3838 3839 #define bfd_elf64_mkobject elf_s390_mkobject 3840 #define elf_backend_object_p elf_s390_object_p 3841 3842 /* Enable ELF64 archive functions. */ 3843 #define bfd_elf64_archive_functions 3844 extern bfd_boolean bfd_elf64_archive_slurp_armap (bfd *); 3845 extern bfd_boolean bfd_elf64_archive_write_armap (bfd *, unsigned int, struct orl *, unsigned int, int); 3846 3847 #define bfd_elf64_archive_slurp_extended_name_table _bfd_archive_coff_slurp_extended_name_table 3848 #define bfd_elf64_archive_construct_extended_name_table _bfd_archive_coff_construct_extended_name_table 3849 #define bfd_elf64_archive_truncate_arname _bfd_archive_coff_truncate_arname 3850 #define bfd_elf64_archive_read_ar_hdr _bfd_archive_coff_read_ar_hdr 3851 #define bfd_elf64_archive_write_ar_hdr _bfd_archive_coff_write_ar_hdr 3852 #define bfd_elf64_archive_openr_next_archived_file _bfd_archive_coff_openr_next_archived_file 3853 #define bfd_elf64_archive_get_elt_at_index _bfd_archive_coff_get_elt_at_index 3854 #define bfd_elf64_archive_generic_stat_arch_elt _bfd_archive_coff_generic_stat_arch_elt 3855 #define bfd_elf64_archive_update_armap_timestamp _bfd_archive_coff_update_armap_timestamp 3856 3857 #include "elf64-target.h" 3858
Indexes created Fri Apr 24 00:22:58 UTC 2026