1/* IBM S/390-specific support for 32-bit ELF 2 Copyright (C) 2000-2017 Free Software Foundation, Inc. 3 Contributed by Carl B. Pedersen and Martin Schwidefsky. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 20 02110-1301, USA. */ 21 22#include "sysdep.h" 23#include "bfd.h" 24#include "bfdlink.h" 25#include "libbfd.h" 26#include "elf-bfd.h" 27#include "elf/s390.h" 28#include <stdarg.h> 29 30static bfd_reloc_status_type 31s390_tls_reloc (bfd *, arelent *, asymbol *, void *, 32 asection *, bfd *, char **); 33static bfd_reloc_status_type 34s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *, 35 asection *, bfd *, char **); 36 37/* The relocation "howto" table. */ 38 39static reloc_howto_type elf_howto_table[] = 40{ 41 HOWTO (R_390_NONE, /* type */ 42 0, /* rightshift */ 43 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */ 44 0, /* bitsize */ 45 FALSE, /* pc_relative */ 46 0, /* bitpos */ 47 complain_overflow_dont, /* complain_on_overflow */ 48 bfd_elf_generic_reloc, /* special_function */ 49 "R_390_NONE", /* name */ 50 FALSE, /* partial_inplace */ 51 0, /* src_mask */ 52 0, /* dst_mask */ 53 FALSE), /* pcrel_offset */ 54 55 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 56 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), 57 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 58 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), 59 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 60 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), 61 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 62 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), 63 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 64 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), 65 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield, 66 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), 67 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 68 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), 69 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 70 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), 71 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 72 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE), 73 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 74 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE), 75 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 76 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE), 77 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 78 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE), 79 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 80 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE), 81 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 82 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE), 83 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 84 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), 85 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, 86 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), 87 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, 88 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), 89 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, 90 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), 91 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 92 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), 93 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 94 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), 95 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 96 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE), 97 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */ 98 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */ 99 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */ 100 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */ 101 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 102 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE), 103 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 104 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), 105 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */ 106 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 107 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), 108 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 109 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), 110 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 111 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), 112 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */ 113 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 114 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE), 115 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 116 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), 117 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 118 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), 119 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */ 120 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, 121 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), 122 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, 123 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), 124 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, 125 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), 126 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 127 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE), 128 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */ 129 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 130 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), 131 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 132 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE), 133 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */ 134 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 135 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE), 136 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */ 137 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 138 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE), 139 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */ 140 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 141 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE), 142 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 143 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE), 144 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */ 145 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 146 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE), 147 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */ 148 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 149 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE), 150 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 151 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE), 152 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 153 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE), 154 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 155 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE), 156 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 157 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE), 158 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 159 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE), 160 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 161 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE), 162 HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 163 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE), 164 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, 165 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE), 166 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, 167 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE), 168 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, 169 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE), 170 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, 171 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE), 172}; 173 174/* GNU extension to record C++ vtable hierarchy. */ 175static reloc_howto_type elf32_s390_vtinherit_howto = 176 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); 177static reloc_howto_type elf32_s390_vtentry_howto = 178 HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE); 179 180static reloc_howto_type * 181elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 182 bfd_reloc_code_real_type code) 183{ 184 switch (code) 185 { 186 case BFD_RELOC_NONE: 187 return &elf_howto_table[(int) R_390_NONE]; 188 case BFD_RELOC_8: 189 return &elf_howto_table[(int) R_390_8]; 190 case BFD_RELOC_390_12: 191 return &elf_howto_table[(int) R_390_12]; 192 case BFD_RELOC_16: 193 return &elf_howto_table[(int) R_390_16]; 194 case BFD_RELOC_32: 195 return &elf_howto_table[(int) R_390_32]; 196 case BFD_RELOC_CTOR: 197 return &elf_howto_table[(int) R_390_32]; 198 case BFD_RELOC_32_PCREL: 199 return &elf_howto_table[(int) R_390_PC32]; 200 case BFD_RELOC_390_GOT12: 201 return &elf_howto_table[(int) R_390_GOT12]; 202 case BFD_RELOC_32_GOT_PCREL: 203 return &elf_howto_table[(int) R_390_GOT32]; 204 case BFD_RELOC_390_PLT32: 205 return &elf_howto_table[(int) R_390_PLT32]; 206 case BFD_RELOC_390_COPY: 207 return &elf_howto_table[(int) R_390_COPY]; 208 case BFD_RELOC_390_GLOB_DAT: 209 return &elf_howto_table[(int) R_390_GLOB_DAT]; 210 case BFD_RELOC_390_JMP_SLOT: 211 return &elf_howto_table[(int) R_390_JMP_SLOT]; 212 case BFD_RELOC_390_RELATIVE: 213 return &elf_howto_table[(int) R_390_RELATIVE]; 214 case BFD_RELOC_32_GOTOFF: 215 return &elf_howto_table[(int) R_390_GOTOFF32]; 216 case BFD_RELOC_390_GOTPC: 217 return &elf_howto_table[(int) R_390_GOTPC]; 218 case BFD_RELOC_390_GOT16: 219 return &elf_howto_table[(int) R_390_GOT16]; 220 case BFD_RELOC_16_PCREL: 221 return &elf_howto_table[(int) R_390_PC16]; 222 case BFD_RELOC_390_PC12DBL: 223 return &elf_howto_table[(int) R_390_PC12DBL]; 224 case BFD_RELOC_390_PLT12DBL: 225 return &elf_howto_table[(int) R_390_PLT12DBL]; 226 case BFD_RELOC_390_PC16DBL: 227 return &elf_howto_table[(int) R_390_PC16DBL]; 228 case BFD_RELOC_390_PLT16DBL: 229 return &elf_howto_table[(int) R_390_PLT16DBL]; 230 case BFD_RELOC_390_PC24DBL: 231 return &elf_howto_table[(int) R_390_PC24DBL]; 232 case BFD_RELOC_390_PLT24DBL: 233 return &elf_howto_table[(int) R_390_PLT24DBL]; 234 case BFD_RELOC_390_PC32DBL: 235 return &elf_howto_table[(int) R_390_PC32DBL]; 236 case BFD_RELOC_390_PLT32DBL: 237 return &elf_howto_table[(int) R_390_PLT32DBL]; 238 case BFD_RELOC_390_GOTPCDBL: 239 return &elf_howto_table[(int) R_390_GOTPCDBL]; 240 case BFD_RELOC_390_GOTENT: 241 return &elf_howto_table[(int) R_390_GOTENT]; 242 case BFD_RELOC_16_GOTOFF: 243 return &elf_howto_table[(int) R_390_GOTOFF16]; 244 case BFD_RELOC_390_GOTPLT12: 245 return &elf_howto_table[(int) R_390_GOTPLT12]; 246 case BFD_RELOC_390_GOTPLT16: 247 return &elf_howto_table[(int) R_390_GOTPLT16]; 248 case BFD_RELOC_390_GOTPLT32: 249 return &elf_howto_table[(int) R_390_GOTPLT32]; 250 case BFD_RELOC_390_GOTPLTENT: 251 return &elf_howto_table[(int) R_390_GOTPLTENT]; 252 case BFD_RELOC_390_PLTOFF16: 253 return &elf_howto_table[(int) R_390_PLTOFF16]; 254 case BFD_RELOC_390_PLTOFF32: 255 return &elf_howto_table[(int) R_390_PLTOFF32]; 256 case BFD_RELOC_390_TLS_LOAD: 257 return &elf_howto_table[(int) R_390_TLS_LOAD]; 258 case BFD_RELOC_390_TLS_GDCALL: 259 return &elf_howto_table[(int) R_390_TLS_GDCALL]; 260 case BFD_RELOC_390_TLS_LDCALL: 261 return &elf_howto_table[(int) R_390_TLS_LDCALL]; 262 case BFD_RELOC_390_TLS_GD32: 263 return &elf_howto_table[(int) R_390_TLS_GD32]; 264 case BFD_RELOC_390_TLS_GOTIE12: 265 return &elf_howto_table[(int) R_390_TLS_GOTIE12]; 266 case BFD_RELOC_390_TLS_GOTIE32: 267 return &elf_howto_table[(int) R_390_TLS_GOTIE32]; 268 case BFD_RELOC_390_TLS_LDM32: 269 return &elf_howto_table[(int) R_390_TLS_LDM32]; 270 case BFD_RELOC_390_TLS_IE32: 271 return &elf_howto_table[(int) R_390_TLS_IE32]; 272 case BFD_RELOC_390_TLS_IEENT: 273 return &elf_howto_table[(int) R_390_TLS_IEENT]; 274 case BFD_RELOC_390_TLS_LE32: 275 return &elf_howto_table[(int) R_390_TLS_LE32]; 276 case BFD_RELOC_390_TLS_LDO32: 277 return &elf_howto_table[(int) R_390_TLS_LDO32]; 278 case BFD_RELOC_390_TLS_DTPMOD: 279 return &elf_howto_table[(int) R_390_TLS_DTPMOD]; 280 case BFD_RELOC_390_TLS_DTPOFF: 281 return &elf_howto_table[(int) R_390_TLS_DTPOFF]; 282 case BFD_RELOC_390_TLS_TPOFF: 283 return &elf_howto_table[(int) R_390_TLS_TPOFF]; 284 case BFD_RELOC_390_20: 285 return &elf_howto_table[(int) R_390_20]; 286 case BFD_RELOC_390_GOT20: 287 return &elf_howto_table[(int) R_390_GOT20]; 288 case BFD_RELOC_390_GOTPLT20: 289 return &elf_howto_table[(int) R_390_GOTPLT20]; 290 case BFD_RELOC_390_TLS_GOTIE20: 291 return &elf_howto_table[(int) R_390_TLS_GOTIE20]; 292 case BFD_RELOC_390_IRELATIVE: 293 return &elf_howto_table[(int) R_390_IRELATIVE]; 294 case BFD_RELOC_VTABLE_INHERIT: 295 return &elf32_s390_vtinherit_howto; 296 case BFD_RELOC_VTABLE_ENTRY: 297 return &elf32_s390_vtentry_howto; 298 default: 299 break; 300 } 301 return 0; 302} 303 304static reloc_howto_type * 305elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 306 const char *r_name) 307{ 308 unsigned int i; 309 310 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) 311 if (elf_howto_table[i].name != NULL 312 && strcasecmp (elf_howto_table[i].name, r_name) == 0) 313 return &elf_howto_table[i]; 314 315 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0) 316 return &elf32_s390_vtinherit_howto; 317 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0) 318 return &elf32_s390_vtentry_howto; 319 320 return NULL; 321} 322 323/* We need to use ELF32_R_TYPE so we have our own copy of this function, 324 and elf32-s390.c has its own copy. */ 325 326static void 327elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 328 arelent *cache_ptr, 329 Elf_Internal_Rela *dst) 330{ 331 unsigned int r_type = ELF32_R_TYPE(dst->r_info); 332 switch (r_type) 333 { 334 case R_390_GNU_VTINHERIT: 335 cache_ptr->howto = &elf32_s390_vtinherit_howto; 336 break; 337 338 case R_390_GNU_VTENTRY: 339 cache_ptr->howto = &elf32_s390_vtentry_howto; 340 break; 341 342 default: 343 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0])) 344 { 345 /* xgettext:c-format */ 346 _bfd_error_handler (_("%B: invalid relocation type %d"), 347 abfd, (int) r_type); 348 r_type = R_390_NONE; 349 } 350 cache_ptr->howto = &elf_howto_table[r_type]; 351 } 352} 353 354/* A relocation function which doesn't do anything. */ 355static bfd_reloc_status_type 356s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED, 357 arelent *reloc_entry, 358 asymbol *symbol ATTRIBUTE_UNUSED, 359 void * data ATTRIBUTE_UNUSED, 360 asection *input_section, 361 bfd *output_bfd, 362 char **error_message ATTRIBUTE_UNUSED) 363{ 364 if (output_bfd) 365 reloc_entry->address += input_section->output_offset; 366 return bfd_reloc_ok; 367} 368 369/* Handle the large displacement relocs. */ 370static bfd_reloc_status_type 371s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED, 372 arelent *reloc_entry, 373 asymbol *symbol, 374 void * data ATTRIBUTE_UNUSED, 375 asection *input_section, 376 bfd *output_bfd, 377 char **error_message ATTRIBUTE_UNUSED) 378{ 379 reloc_howto_type *howto = reloc_entry->howto; 380 bfd_vma relocation; 381 bfd_vma insn; 382 383 if (output_bfd != (bfd *) NULL 384 && (symbol->flags & BSF_SECTION_SYM) == 0 385 && (! howto->partial_inplace 386 || reloc_entry->addend == 0)) 387 { 388 reloc_entry->address += input_section->output_offset; 389 return bfd_reloc_ok; 390 } 391 392 if (output_bfd != NULL) 393 return bfd_reloc_continue; 394 395 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 396 return bfd_reloc_outofrange; 397 398 relocation = (symbol->value 399 + symbol->section->output_section->vma 400 + symbol->section->output_offset); 401 relocation += reloc_entry->addend; 402 if (howto->pc_relative) 403 { 404 relocation -= (input_section->output_section->vma 405 + input_section->output_offset); 406 relocation -= reloc_entry->address; 407 } 408 409 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); 410 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; 411 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); 412 413 if ((bfd_signed_vma) relocation < - 0x80000 414 || (bfd_signed_vma) relocation > 0x7ffff) 415 return bfd_reloc_overflow; 416 else 417 return bfd_reloc_ok; 418} 419 420static bfd_boolean 421elf_s390_is_local_label_name (bfd *abfd, const char *name) 422{ 423 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) 424 return TRUE; 425 426 return _bfd_elf_is_local_label_name (abfd, name); 427} 428 429/* Functions for the 390 ELF linker. */ 430 431/* The name of the dynamic interpreter. This is put in the .interp 432 section. */ 433 434#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" 435 436/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 437 copying dynamic variables from a shared lib into an app's dynbss 438 section, and instead use a dynamic relocation to point into the 439 shared lib. */ 440#define ELIMINATE_COPY_RELOCS 1 441 442/* The size in bytes of the first entry in the procedure linkage table. */ 443#define PLT_FIRST_ENTRY_SIZE 32 444/* The size in bytes of an entry in the procedure linkage table. */ 445#define PLT_ENTRY_SIZE 32 446 447#define GOT_ENTRY_SIZE 4 448 449#define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela) 450 451/* The first three entries in a procedure linkage table are reserved, 452 and the initial contents are unimportant (we zero them out). 453 Subsequent entries look like this. See the SVR4 ABI 386 454 supplement to see how this works. */ 455 456/* For the s390, simple addr offset can only be 0 - 4096. 457 To use the full 2 GB address space, several instructions 458 are needed to load an address in a register and execute 459 a branch( or just saving the address) 460 461 Furthermore, only r 0 and 1 are free to use!!! */ 462 463/* The first 3 words in the GOT are then reserved. 464 Word 0 is the address of the dynamic table. 465 Word 1 is a pointer to a structure describing the object 466 Word 2 is used to point to the loader entry address. 467 468 The code for position independent PLT entries looks like this: 469 470 r12 holds addr of the current GOT at entry to the PLT 471 472 The GOT holds the address in the PLT to be executed. 473 The loader then gets: 474 24(15) = Pointer to the structure describing the object. 475 28(15) = Offset into rela.plt 476 477 The loader must then find the module where the function is 478 and insert the address in the GOT. 479 480 Note: 390 can only address +- 64 K relative. 481 We check if offset > 65536, then make a relative branch -64xxx 482 back to a previous defined branch 483 484PLT1: BASR 1,0 # 2 bytes 485 L 1,22(1) # 4 bytes Load offset in GOT in r 1 486 L 1,(1,12) # 4 bytes Load address from GOT in r1 487 BCR 15,1 # 2 bytes Jump to address 488RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 489 L 1,14(1) # 4 bytes Load offset in symol table in r1 490 BRC 15,-x # 4 bytes Jump to start of PLT 491 .word 0 # 2 bytes filler 492 .long ? # 4 bytes offset in GOT 493 .long ? # 4 bytes offset into rela.plt 494 495 This was the general case. There are two additional, optimizes PLT 496 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768. 497 First the one for GOT offsets < 4096: 498 499PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1 500 BCR 15,1 # 2 bytes Jump to address 501 .word 0,0,0 # 6 bytes filler 502RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 503 L 1,14(1) # 4 bytes Load offset in rela.plt in r1 504 BRC 15,-x # 4 bytes Jump to start of PLT 505 .word 0,0,0 # 6 bytes filler 506 .long ? # 4 bytes offset into rela.plt 507 508 Second the one for GOT offsets < 32768: 509 510PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1 511 L 1,(1,12) # 4 bytes Load address from GOT to r1 512 BCR 15,1 # 2 bytes Jump to address 513 .word 0 # 2 bytes filler 514RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 515 L 1,14(1) # 4 bytes Load offset in rela.plt in r1 516 BRC 15,-x # 4 bytes Jump to start of PLT 517 .word 0,0,0 # 6 bytes filler 518 .long ? # 4 bytes offset into rela.plt 519 520Total = 32 bytes per PLT entry 521 522 The code for static build PLT entries looks like this: 523 524PLT1: BASR 1,0 # 2 bytes 525 L 1,22(1) # 4 bytes Load address of GOT entry 526 L 1,0(0,1) # 4 bytes Load address from GOT in r1 527 BCR 15,1 # 2 bytes Jump to address 528RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 529 L 1,14(1) # 4 bytes Load offset in symbol table in r1 530 BRC 15,-x # 4 bytes Jump to start of PLT 531 .word 0 # 2 bytes filler 532 .long ? # 4 bytes address of GOT entry 533 .long ? # 4 bytes offset into rela.plt */ 534 535static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] = 536 { 537 0x0d, 0x10, /* basr %r1,%r0 */ 538 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */ 539 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */ 540 0x07, 0xf1, /* br %r1 */ 541 0x0d, 0x10, /* basr %r1,%r0 */ 542 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */ 543 0xa7, 0xf4, 0x00, 0x00, /* j first plt */ 544 0x00, 0x00, /* padding */ 545 0x00, 0x00, 0x00, 0x00, /* GOT offset */ 546 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */ 547 }; 548 549/* Generic PLT pic entry. */ 550static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] = 551 { 552 0x0d, 0x10, /* basr %r1,%r0 */ 553 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */ 554 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */ 555 0x07, 0xf1, /* br %r1 */ 556 0x0d, 0x10, /* basr %r1,%r0 */ 557 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */ 558 0xa7, 0xf4, 0x00, 0x00, /* j first plt */ 559 0x00, 0x00, /* padding */ 560 0x00, 0x00, 0x00, 0x00, /* GOT offset */ 561 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */ 562 }; 563 564/* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced 565 when generating the PLT slot with the GOT offset. */ 566static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] = 567 { 568 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */ 569 0x07, 0xf1, /* br %r1 */ 570 0x00, 0x00, 0x00, 0x00, /* padding */ 571 0x00, 0x00, 572 0x0d, 0x10, /* basr %r1,%r0 */ 573 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */ 574 0xa7, 0xf4, 0x00, 0x00, /* j first plt */ 575 0x00, 0x00, 0x00, 0x00, 576 0x00, 0x00, 0x00, 0x00 577 }; 578 579/* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced 580 when generating the PLT slot with the GOT offset. */ 581static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] = 582 { 583 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */ 584 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */ 585 0x07, 0xf1, /* br %r1 */ 586 0x00, 0x00, 587 0x0d, 0x10, /* basr %r1,%r0 */ 588 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */ 589 0xa7, 0xf4, 0x00, 0x00, /* j first plt */ 590 0x00, 0x00, 0x00, 0x00, 591 0x00, 0x00, 0x00, 0x00, 592 0x00, 0x00 593 }; 594 595/* The first PLT entry pushes the offset into the rela.plt 596 from R1 onto the stack at 8(15) and the loader object info 597 at 12(15), loads the loader address in R1 and jumps to it. */ 598 599/* The first entry in the PLT for PIC code: 600 601PLT0: 602 ST 1,28(15) # R1 has offset into rela.plt 603 L 1,4(12) # Get loader ino(object struct address) 604 ST 1,24(15) # Store address 605 L 1,8(12) # Entry address of loader in R1 606 BR 1 # Jump to loader 607 608 The first entry in the PLT for static code: 609 610PLT0: 611 ST 1,28(15) # R1 has offset into rela.plt 612 BASR 1,0 613 L 1,18(0,1) # Get address of GOT 614 MVC 24(4,15),4(1) # Move loader ino to stack 615 L 1,8(1) # Get address of loader 616 BR 1 # Jump to loader 617 .word 0 # filler 618 .long got # address of GOT */ 619 620static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] = 621 { 622 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */ 623 0x0d, 0x10, /* basr %r1,%r0 */ 624 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */ 625 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */ 626 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */ 627 0x07, 0xf1, /* br %r1 */ 628 0x00, 0x00, 0x00, 0x00, 629 0x00, 0x00, 0x00, 0x00, 630 0x00, 0x00 631 }; 632 633static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] = 634 { 635 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */ 636 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */ 637 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */ 638 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */ 639 0x07, 0xf1, /* br %r1 */ 640 0x00, 0x00, 0x00, 0x00, 641 0x00, 0x00, 0x00, 0x00, 642 0x00, 0x00, 0x00, 0x00, 643 0x00, 0x00 644 }; 645 646 647/* s390 ELF linker hash entry. */ 648 649struct elf_s390_link_hash_entry 650{ 651 struct elf_link_hash_entry elf; 652 653 /* Track dynamic relocs copied for this symbol. */ 654 struct elf_dyn_relocs *dyn_relocs; 655 656 /* Number of GOTPLT references for a function. */ 657 bfd_signed_vma gotplt_refcount; 658 659#define GOT_UNKNOWN 0 660#define GOT_NORMAL 1 661#define GOT_TLS_GD 2 662#define GOT_TLS_IE 3 663#define GOT_TLS_IE_NLT 4 664 unsigned char tls_type; 665 666 /* For pointer equality reasons we might need to change the symbol 667 type from STT_GNU_IFUNC to STT_FUNC together with its value and 668 section entry. So after alloc_dynrelocs only these values should 669 be used. In order to check whether a symbol is IFUNC use 670 s390_is_ifunc_symbol_p. */ 671 bfd_vma ifunc_resolver_address; 672 asection *ifunc_resolver_section; 673}; 674 675#define elf_s390_hash_entry(ent) \ 676 ((struct elf_s390_link_hash_entry *)(ent)) 677 678/* This structure represents an entry in the local PLT list needed for 679 local IFUNC symbols. */ 680struct plt_entry 681{ 682 /* The section of the local symbol. 683 Set in relocate_section and used in finish_dynamic_sections. */ 684 asection *sec; 685 686 union 687 { 688 bfd_signed_vma refcount; 689 bfd_vma offset; 690 } plt; 691}; 692 693/* NOTE: Keep this structure in sync with 694 the one declared in elf64-s390.c. */ 695struct elf_s390_obj_tdata 696{ 697 struct elf_obj_tdata root; 698 699 /* A local PLT is needed for ifunc symbols. */ 700 struct plt_entry *local_plt; 701 702 /* TLS type for each local got entry. */ 703 char *local_got_tls_type; 704}; 705 706#define elf_s390_tdata(abfd) \ 707 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) 708 709#define elf_s390_local_plt(abfd) \ 710 (elf_s390_tdata (abfd)->local_plt) 711 712#define elf_s390_local_got_tls_type(abfd) \ 713 (elf_s390_tdata (abfd)->local_got_tls_type) 714 715#define is_s390_elf(bfd) \ 716 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 717 && elf_tdata (bfd) != NULL \ 718 && elf_object_id (bfd) == S390_ELF_DATA) 719 720static bfd_boolean 721elf_s390_mkobject (bfd *abfd) 722{ 723 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata), 724 S390_ELF_DATA); 725} 726 727static bfd_boolean 728elf_s390_object_p (bfd *abfd) 729{ 730 /* Set the right machine number for an s390 elf32 file. */ 731 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31); 732} 733 734/* s390 ELF linker hash table. */ 735 736struct elf_s390_link_hash_table 737{ 738 struct elf_link_hash_table elf; 739 740 /* Short-cuts to get to dynamic linker sections. */ 741 asection *irelifunc; 742 743 union 744 { 745 bfd_signed_vma refcount; 746 bfd_vma offset; 747 } tls_ldm_got; 748 749 /* Small local sym cache. */ 750 struct sym_cache sym_cache; 751}; 752 753/* Get the s390 ELF linker hash table from a link_info structure. */ 754 755#define elf_s390_hash_table(p) \ 756 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 757 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL) 758 759#undef ELF64 760#include "elf-s390-common.c" 761 762/* Create an entry in an s390 ELF linker hash table. */ 763 764static struct bfd_hash_entry * 765link_hash_newfunc (struct bfd_hash_entry *entry, 766 struct bfd_hash_table *table, 767 const char *string) 768{ 769 /* Allocate the structure if it has not already been allocated by a 770 subclass. */ 771 if (entry == NULL) 772 { 773 entry = bfd_hash_allocate (table, 774 sizeof (struct elf_s390_link_hash_entry)); 775 if (entry == NULL) 776 return entry; 777 } 778 779 /* Call the allocation method of the superclass. */ 780 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 781 if (entry != NULL) 782 { 783 struct elf_s390_link_hash_entry *eh; 784 785 eh = (struct elf_s390_link_hash_entry *) entry; 786 eh->dyn_relocs = NULL; 787 eh->gotplt_refcount = 0; 788 eh->tls_type = GOT_UNKNOWN; 789 eh->ifunc_resolver_address = 0; 790 eh->ifunc_resolver_section = NULL; 791 } 792 793 return entry; 794} 795 796/* Create an s390 ELF linker hash table. */ 797 798static struct bfd_link_hash_table * 799elf_s390_link_hash_table_create (bfd *abfd) 800{ 801 struct elf_s390_link_hash_table *ret; 802 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); 803 804 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt); 805 if (ret == NULL) 806 return NULL; 807 808 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, 809 sizeof (struct elf_s390_link_hash_entry), 810 S390_ELF_DATA)) 811 { 812 free (ret); 813 return NULL; 814 } 815 816 return &ret->elf.root; 817} 818 819/* Copy the extra info we tack onto an elf_link_hash_entry. */ 820 821static void 822elf_s390_copy_indirect_symbol (struct bfd_link_info *info, 823 struct elf_link_hash_entry *dir, 824 struct elf_link_hash_entry *ind) 825{ 826 struct elf_s390_link_hash_entry *edir, *eind; 827 828 edir = (struct elf_s390_link_hash_entry *) dir; 829 eind = (struct elf_s390_link_hash_entry *) ind; 830 831 if (eind->dyn_relocs != NULL) 832 { 833 if (edir->dyn_relocs != NULL) 834 { 835 struct elf_dyn_relocs **pp; 836 struct elf_dyn_relocs *p; 837 838 /* Add reloc counts against the indirect sym to the direct sym 839 list. Merge any entries against the same section. */ 840 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 841 { 842 struct elf_dyn_relocs *q; 843 844 for (q = edir->dyn_relocs; q != NULL; q = q->next) 845 if (q->sec == p->sec) 846 { 847 q->pc_count += p->pc_count; 848 q->count += p->count; 849 *pp = p->next; 850 break; 851 } 852 if (q == NULL) 853 pp = &p->next; 854 } 855 *pp = edir->dyn_relocs; 856 } 857 858 edir->dyn_relocs = eind->dyn_relocs; 859 eind->dyn_relocs = NULL; 860 } 861 862 if (ind->root.type == bfd_link_hash_indirect 863 && dir->got.refcount <= 0) 864 { 865 edir->tls_type = eind->tls_type; 866 eind->tls_type = GOT_UNKNOWN; 867 } 868 869 if (ELIMINATE_COPY_RELOCS 870 && ind->root.type != bfd_link_hash_indirect 871 && dir->dynamic_adjusted) 872 { 873 /* If called to transfer flags for a weakdef during processing 874 of elf_adjust_dynamic_symbol, don't copy non_got_ref. 875 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 876 if (dir->versioned != versioned_hidden) 877 dir->ref_dynamic |= ind->ref_dynamic; 878 dir->ref_regular |= ind->ref_regular; 879 dir->ref_regular_nonweak |= ind->ref_regular_nonweak; 880 dir->needs_plt |= ind->needs_plt; 881 } 882 else 883 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 884} 885 886static int 887elf_s390_tls_transition (struct bfd_link_info *info, 888 int r_type, 889 int is_local) 890{ 891 if (bfd_link_pic (info)) 892 return r_type; 893 894 switch (r_type) 895 { 896 case R_390_TLS_GD32: 897 case R_390_TLS_IE32: 898 if (is_local) 899 return R_390_TLS_LE32; 900 return R_390_TLS_IE32; 901 case R_390_TLS_GOTIE32: 902 if (is_local) 903 return R_390_TLS_LE32; 904 return R_390_TLS_GOTIE32; 905 case R_390_TLS_LDM32: 906 return R_390_TLS_LE32; 907 } 908 909 return r_type; 910} 911 912/* Look through the relocs for a section during the first phase, and 913 allocate space in the global offset table or procedure linkage 914 table. */ 915 916static bfd_boolean 917elf_s390_check_relocs (bfd *abfd, 918 struct bfd_link_info *info, 919 asection *sec, 920 const Elf_Internal_Rela *relocs) 921{ 922 struct elf_s390_link_hash_table *htab; 923 Elf_Internal_Shdr *symtab_hdr; 924 struct elf_link_hash_entry **sym_hashes; 925 const Elf_Internal_Rela *rel; 926 const Elf_Internal_Rela *rel_end; 927 asection *sreloc; 928 bfd_signed_vma *local_got_refcounts; 929 int tls_type, old_tls_type; 930 Elf_Internal_Sym *isym; 931 932 if (bfd_link_relocatable (info)) 933 return TRUE; 934 935 BFD_ASSERT (is_s390_elf (abfd)); 936 937 htab = elf_s390_hash_table (info); 938 symtab_hdr = &elf_symtab_hdr (abfd); 939 sym_hashes = elf_sym_hashes (abfd); 940 local_got_refcounts = elf_local_got_refcounts (abfd); 941 942 sreloc = NULL; 943 944 rel_end = relocs + sec->reloc_count; 945 for (rel = relocs; rel < rel_end; rel++) 946 { 947 unsigned int r_type; 948 unsigned long r_symndx; 949 struct elf_link_hash_entry *h; 950 951 r_symndx = ELF32_R_SYM (rel->r_info); 952 953 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) 954 { 955 /* xgettext:c-format */ 956 _bfd_error_handler (_("%B: bad symbol index: %d"), 957 abfd, r_symndx); 958 return FALSE; 959 } 960 961 if (r_symndx < symtab_hdr->sh_info) 962 { 963 /* A local symbol. */ 964 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 965 abfd, r_symndx); 966 if (isym == NULL) 967 return FALSE; 968 969 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 970 { 971 struct plt_entry *plt; 972 973 if (htab->elf.dynobj == NULL) 974 htab->elf.dynobj = abfd; 975 976 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) 977 return FALSE; 978 979 if (local_got_refcounts == NULL) 980 { 981 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr)) 982 return FALSE; 983 local_got_refcounts = elf_local_got_refcounts (abfd); 984 } 985 plt = elf_s390_local_plt (abfd); 986 plt[r_symndx].plt.refcount++; 987 } 988 h = NULL; 989 } 990 else 991 { 992 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 993 while (h->root.type == bfd_link_hash_indirect 994 || h->root.type == bfd_link_hash_warning) 995 h = (struct elf_link_hash_entry *) h->root.u.i.link; 996 997 /* PR15323, ref flags aren't set for references in the same 998 object. */ 999 h->root.non_ir_ref = 1; 1000 } 1001 1002 /* Create got section and local_got_refcounts array if they 1003 are needed. */ 1004 r_type = elf_s390_tls_transition (info, 1005 ELF32_R_TYPE (rel->r_info), 1006 h == NULL); 1007 switch (r_type) 1008 { 1009 case R_390_GOT12: 1010 case R_390_GOT16: 1011 case R_390_GOT20: 1012 case R_390_GOT32: 1013 case R_390_GOTENT: 1014 case R_390_GOTPLT12: 1015 case R_390_GOTPLT16: 1016 case R_390_GOTPLT20: 1017 case R_390_GOTPLT32: 1018 case R_390_GOTPLTENT: 1019 case R_390_TLS_GD32: 1020 case R_390_TLS_GOTIE12: 1021 case R_390_TLS_GOTIE20: 1022 case R_390_TLS_GOTIE32: 1023 case R_390_TLS_IEENT: 1024 case R_390_TLS_IE32: 1025 case R_390_TLS_LDM32: 1026 if (h == NULL 1027 && local_got_refcounts == NULL) 1028 { 1029 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr)) 1030 return FALSE; 1031 local_got_refcounts = elf_local_got_refcounts (abfd); 1032 } 1033 /* Fall through. */ 1034 case R_390_GOTOFF16: 1035 case R_390_GOTOFF32: 1036 case R_390_GOTPC: 1037 case R_390_GOTPCDBL: 1038 if (htab->elf.sgot == NULL) 1039 { 1040 if (htab->elf.dynobj == NULL) 1041 htab->elf.dynobj = abfd; 1042 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) 1043 return FALSE; 1044 } 1045 } 1046 1047 if (h != NULL) 1048 { 1049 if (htab->elf.dynobj == NULL) 1050 htab->elf.dynobj = abfd; 1051 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) 1052 return FALSE; 1053 1054 /* Make sure an IFUNC symbol defined in a non-shared object 1055 always gets a PLT slot. */ 1056 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 1057 { 1058 /* The symbol is called by the dynamic loader in order 1059 to resolve the relocation. So it is in fact also 1060 referenced. */ 1061 h->ref_regular = 1; 1062 h->needs_plt = 1; 1063 } 1064 } 1065 switch (r_type) 1066 { 1067 case R_390_GOTPC: 1068 case R_390_GOTPCDBL: 1069 /* These relocs do not need a GOT slot. They just load the 1070 GOT pointer itself or address something else relative to 1071 the GOT. Since the GOT pointer has been set up above we 1072 are done. */ 1073 break; 1074 case R_390_GOTOFF16: 1075 case R_390_GOTOFF32: 1076 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular) 1077 break; 1078 /* Fall through. */ 1079 1080 case R_390_PLT12DBL: 1081 case R_390_PLT16DBL: 1082 case R_390_PLT24DBL: 1083 case R_390_PLT32DBL: 1084 case R_390_PLT32: 1085 case R_390_PLTOFF16: 1086 case R_390_PLTOFF32: 1087 /* This symbol requires a procedure linkage table entry. We 1088 actually build the entry in adjust_dynamic_symbol, 1089 because this might be a case of linking PIC code which is 1090 never referenced by a dynamic object, in which case we 1091 don't need to generate a procedure linkage table entry 1092 after all. */ 1093 1094 /* If this is a local symbol, we resolve it directly without 1095 creating a procedure linkage table entry. */ 1096 if (h != NULL) 1097 { 1098 h->needs_plt = 1; 1099 h->plt.refcount += 1; 1100 } 1101 break; 1102 1103 case R_390_GOTPLT12: 1104 case R_390_GOTPLT16: 1105 case R_390_GOTPLT20: 1106 case R_390_GOTPLT32: 1107 case R_390_GOTPLTENT: 1108 /* This symbol requires either a procedure linkage table entry 1109 or an entry in the local got. We actually build the entry 1110 in adjust_dynamic_symbol because whether this is really a 1111 global reference can change and with it the fact if we have 1112 to create a plt entry or a local got entry. To be able to 1113 make a once global symbol a local one we have to keep track 1114 of the number of gotplt references that exist for this 1115 symbol. */ 1116 if (h != NULL) 1117 { 1118 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; 1119 h->needs_plt = 1; 1120 h->plt.refcount += 1; 1121 } 1122 else 1123 local_got_refcounts[r_symndx] += 1; 1124 break; 1125 1126 case R_390_TLS_LDM32: 1127 htab->tls_ldm_got.refcount += 1; 1128 break; 1129 1130 case R_390_TLS_IE32: 1131 case R_390_TLS_GOTIE12: 1132 case R_390_TLS_GOTIE20: 1133 case R_390_TLS_GOTIE32: 1134 case R_390_TLS_IEENT: 1135 if (bfd_link_pic (info)) 1136 info->flags |= DF_STATIC_TLS; 1137 /* Fall through. */ 1138 1139 case R_390_GOT12: 1140 case R_390_GOT16: 1141 case R_390_GOT20: 1142 case R_390_GOT32: 1143 case R_390_GOTENT: 1144 case R_390_TLS_GD32: 1145 /* This symbol requires a global offset table entry. */ 1146 switch (r_type) 1147 { 1148 default: 1149 case R_390_GOT12: 1150 case R_390_GOT16: 1151 case R_390_GOT20: 1152 case R_390_GOT32: 1153 case R_390_GOTENT: 1154 tls_type = GOT_NORMAL; 1155 break; 1156 case R_390_TLS_GD32: 1157 tls_type = GOT_TLS_GD; 1158 break; 1159 case R_390_TLS_IE32: 1160 case R_390_TLS_GOTIE32: 1161 tls_type = GOT_TLS_IE; 1162 break; 1163 case R_390_TLS_GOTIE12: 1164 case R_390_TLS_GOTIE20: 1165 case R_390_TLS_IEENT: 1166 tls_type = GOT_TLS_IE_NLT; 1167 break; 1168 } 1169 1170 if (h != NULL) 1171 { 1172 h->got.refcount += 1; 1173 old_tls_type = elf_s390_hash_entry(h)->tls_type; 1174 } 1175 else 1176 { 1177 local_got_refcounts[r_symndx] += 1; 1178 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; 1179 } 1180 /* If a TLS symbol is accessed using IE at least once, 1181 there is no point to use dynamic model for it. */ 1182 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) 1183 { 1184 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) 1185 { 1186 _bfd_error_handler 1187 /* xgettext:c-format */ 1188 (_("%B: `%s' accessed both as normal and thread local symbol"), 1189 abfd, h->root.root.string); 1190 return FALSE; 1191 } 1192 if (old_tls_type > tls_type) 1193 tls_type = old_tls_type; 1194 } 1195 1196 if (old_tls_type != tls_type) 1197 { 1198 if (h != NULL) 1199 elf_s390_hash_entry (h)->tls_type = tls_type; 1200 else 1201 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; 1202 } 1203 1204 if (r_type != R_390_TLS_IE32) 1205 break; 1206 /* Fall through. */ 1207 1208 case R_390_TLS_LE32: 1209 /* For static linking and executables this reloc will be 1210 calculated at linktime otherwise a TLS_TPOFF runtime 1211 reloc will be generated. */ 1212 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info)) 1213 break; 1214 1215 if (!bfd_link_pic (info)) 1216 break; 1217 info->flags |= DF_STATIC_TLS; 1218 /* Fall through. */ 1219 1220 case R_390_8: 1221 case R_390_16: 1222 case R_390_32: 1223 case R_390_PC16: 1224 case R_390_PC12DBL: 1225 case R_390_PC16DBL: 1226 case R_390_PC24DBL: 1227 case R_390_PC32DBL: 1228 case R_390_PC32: 1229 if (h != NULL && bfd_link_executable (info)) 1230 { 1231 /* If this reloc is in a read-only section, we might 1232 need a copy reloc. We can't check reliably at this 1233 stage whether the section is read-only, as input 1234 sections have not yet been mapped to output sections. 1235 Tentatively set the flag for now, and correct in 1236 adjust_dynamic_symbol. */ 1237 h->non_got_ref = 1; 1238 1239 if (!bfd_link_pic (info)) 1240 { 1241 /* We may need a .plt entry if the function this reloc 1242 refers to is in a shared lib. */ 1243 h->plt.refcount += 1; 1244 } 1245 } 1246 1247 /* If we are creating a shared library, and this is a reloc 1248 against a global symbol, or a non PC relative reloc 1249 against a local symbol, then we need to copy the reloc 1250 into the shared library. However, if we are linking with 1251 -Bsymbolic, we do not need to copy a reloc against a 1252 global symbol which is defined in an object we are 1253 including in the link (i.e., DEF_REGULAR is set). At 1254 this point we have not seen all the input files, so it is 1255 possible that DEF_REGULAR is not set now but will be set 1256 later (it is never cleared). In case of a weak definition, 1257 DEF_REGULAR may be cleared later by a strong definition in 1258 a shared library. We account for that possibility below by 1259 storing information in the relocs_copied field of the hash 1260 table entry. A similar situation occurs when creating 1261 shared libraries and symbol visibility changes render the 1262 symbol local. 1263 1264 If on the other hand, we are creating an executable, we 1265 may need to keep relocations for symbols satisfied by a 1266 dynamic library if we manage to avoid copy relocs for the 1267 symbol. */ 1268 if ((bfd_link_pic (info) 1269 && (sec->flags & SEC_ALLOC) != 0 1270 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16 1271 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL 1272 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL 1273 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL 1274 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL 1275 && ELF32_R_TYPE (rel->r_info) != R_390_PC32) 1276 || (h != NULL 1277 && (! SYMBOLIC_BIND (info, h) 1278 || h->root.type == bfd_link_hash_defweak 1279 || !h->def_regular)))) 1280 || (ELIMINATE_COPY_RELOCS 1281 && !bfd_link_pic (info) 1282 && (sec->flags & SEC_ALLOC) != 0 1283 && h != NULL 1284 && (h->root.type == bfd_link_hash_defweak 1285 || !h->def_regular))) 1286 { 1287 struct elf_dyn_relocs *p; 1288 struct elf_dyn_relocs **head; 1289 1290 /* We must copy these reloc types into the output file. 1291 Create a reloc section in dynobj and make room for 1292 this reloc. */ 1293 if (sreloc == NULL) 1294 { 1295 if (htab->elf.dynobj == NULL) 1296 htab->elf.dynobj = abfd; 1297 1298 sreloc = _bfd_elf_make_dynamic_reloc_section 1299 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE); 1300 1301 if (sreloc == NULL) 1302 return FALSE; 1303 } 1304 1305 /* If this is a global symbol, we count the number of 1306 relocations we need for this symbol. */ 1307 if (h != NULL) 1308 { 1309 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; 1310 } 1311 else 1312 { 1313 /* Track dynamic relocs needed for local syms too. 1314 We really need local syms available to do this 1315 easily. Oh well. */ 1316 asection *s; 1317 void *vpp; 1318 1319 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 1320 abfd, r_symndx); 1321 if (isym == NULL) 1322 return FALSE; 1323 1324 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 1325 if (s == NULL) 1326 s = sec; 1327 1328 vpp = &elf_section_data (s)->local_dynrel; 1329 head = (struct elf_dyn_relocs **) vpp; 1330 } 1331 1332 p = *head; 1333 if (p == NULL || p->sec != sec) 1334 { 1335 bfd_size_type amt = sizeof *p; 1336 1337 p = ((struct elf_dyn_relocs *) 1338 bfd_alloc (htab->elf.dynobj, amt)); 1339 if (p == NULL) 1340 return FALSE; 1341 p->next = *head; 1342 *head = p; 1343 p->sec = sec; 1344 p->count = 0; 1345 p->pc_count = 0; 1346 } 1347 1348 p->count += 1; 1349 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16 1350 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL 1351 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL 1352 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL 1353 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL 1354 || ELF32_R_TYPE (rel->r_info) == R_390_PC32) 1355 p->pc_count += 1; 1356 } 1357 break; 1358 1359 /* This relocation describes the C++ object vtable hierarchy. 1360 Reconstruct it for later use during GC. */ 1361 case R_390_GNU_VTINHERIT: 1362 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1363 return FALSE; 1364 break; 1365 1366 /* This relocation describes which C++ vtable entries are actually 1367 used. Record for later use during GC. */ 1368 case R_390_GNU_VTENTRY: 1369 BFD_ASSERT (h != NULL); 1370 if (h != NULL 1371 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1372 return FALSE; 1373 break; 1374 1375 default: 1376 break; 1377 } 1378 } 1379 1380 return TRUE; 1381} 1382 1383/* Return the section that should be marked against GC for a given 1384 relocation. */ 1385 1386static asection * 1387elf_s390_gc_mark_hook (asection *sec, 1388 struct bfd_link_info *info, 1389 Elf_Internal_Rela *rel, 1390 struct elf_link_hash_entry *h, 1391 Elf_Internal_Sym *sym) 1392{ 1393 if (h != NULL) 1394 switch (ELF32_R_TYPE (rel->r_info)) 1395 { 1396 case R_390_GNU_VTINHERIT: 1397 case R_390_GNU_VTENTRY: 1398 return NULL; 1399 } 1400 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1401 1402} 1403 1404/* Update the got entry reference counts for the section being removed. */ 1405 1406static bfd_boolean 1407elf_s390_gc_sweep_hook (bfd *abfd, 1408 struct bfd_link_info *info, 1409 asection *sec, 1410 const Elf_Internal_Rela *relocs) 1411{ 1412 struct elf_s390_link_hash_table *htab; 1413 Elf_Internal_Shdr *symtab_hdr; 1414 struct elf_link_hash_entry **sym_hashes; 1415 bfd_signed_vma *local_got_refcounts; 1416 const Elf_Internal_Rela *rel, *relend; 1417 1418 if (bfd_link_relocatable (info)) 1419 return TRUE; 1420 1421 htab = elf_s390_hash_table (info); 1422 if (htab == NULL) 1423 return FALSE; 1424 1425 elf_section_data (sec)->local_dynrel = NULL; 1426 1427 symtab_hdr = &elf_symtab_hdr (abfd); 1428 sym_hashes = elf_sym_hashes (abfd); 1429 local_got_refcounts = elf_local_got_refcounts (abfd); 1430 1431 relend = relocs + sec->reloc_count; 1432 for (rel = relocs; rel < relend; rel++) 1433 { 1434 unsigned long r_symndx; 1435 unsigned int r_type; 1436 struct elf_link_hash_entry *h = NULL; 1437 1438 r_symndx = ELF32_R_SYM (rel->r_info); 1439 if (r_symndx >= symtab_hdr->sh_info) 1440 { 1441 struct elf_s390_link_hash_entry *eh; 1442 struct elf_dyn_relocs **pp; 1443 struct elf_dyn_relocs *p; 1444 1445 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1446 while (h->root.type == bfd_link_hash_indirect 1447 || h->root.type == bfd_link_hash_warning) 1448 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1449 eh = (struct elf_s390_link_hash_entry *) h; 1450 1451 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 1452 if (p->sec == sec) 1453 { 1454 /* Everything must go for SEC. */ 1455 *pp = p->next; 1456 break; 1457 } 1458 } 1459 else 1460 { 1461 Elf_Internal_Sym *isym; 1462 1463 /* A local symbol. */ 1464 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 1465 abfd, r_symndx); 1466 if (isym == NULL) 1467 return FALSE; 1468 1469 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 1470 { 1471 struct plt_entry *plt = elf_s390_local_plt (abfd); 1472 if (plt[r_symndx].plt.refcount > 0) 1473 plt[r_symndx].plt.refcount--; 1474 } 1475 } 1476 1477 r_type = ELF32_R_TYPE (rel->r_info); 1478 r_type = elf_s390_tls_transition (info, r_type, h != NULL); 1479 switch (r_type) 1480 { 1481 case R_390_TLS_LDM32: 1482 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) 1483 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; 1484 break; 1485 1486 case R_390_GOTOFF16: 1487 case R_390_GOTOFF32: 1488 if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular) 1489 { 1490 h->plt.refcount--; 1491 break; 1492 } 1493 1494 case R_390_GOTPC: 1495 case R_390_GOTPCDBL: 1496 break; 1497 1498 case R_390_TLS_GD32: 1499 case R_390_TLS_IE32: 1500 case R_390_TLS_GOTIE12: 1501 case R_390_TLS_GOTIE20: 1502 case R_390_TLS_GOTIE32: 1503 case R_390_TLS_IEENT: 1504 case R_390_GOT12: 1505 case R_390_GOT16: 1506 case R_390_GOT20: 1507 case R_390_GOT32: 1508 case R_390_GOTENT: 1509 if (h != NULL) 1510 { 1511 if (h->got.refcount > 0) 1512 h->got.refcount -= 1; 1513 } 1514 else if (local_got_refcounts != NULL) 1515 { 1516 if (local_got_refcounts[r_symndx] > 0) 1517 local_got_refcounts[r_symndx] -= 1; 1518 } 1519 break; 1520 1521 case R_390_8: 1522 case R_390_12: 1523 case R_390_16: 1524 case R_390_20: 1525 case R_390_32: 1526 case R_390_PC16: 1527 case R_390_PC12DBL: 1528 case R_390_PC16DBL: 1529 case R_390_PC24DBL: 1530 case R_390_PC32DBL: 1531 case R_390_PC32: 1532 if (bfd_link_pic (info)) 1533 break; 1534 /* Fall through. */ 1535 1536 case R_390_PLT12DBL: 1537 case R_390_PLT16DBL: 1538 case R_390_PLT24DBL: 1539 case R_390_PLT32DBL: 1540 case R_390_PLT32: 1541 case R_390_PLTOFF16: 1542 case R_390_PLTOFF32: 1543 if (h != NULL) 1544 { 1545 if (h->plt.refcount > 0) 1546 h->plt.refcount -= 1; 1547 } 1548 break; 1549 1550 case R_390_GOTPLT12: 1551 case R_390_GOTPLT16: 1552 case R_390_GOTPLT20: 1553 case R_390_GOTPLT32: 1554 case R_390_GOTPLTENT: 1555 if (h != NULL) 1556 { 1557 if (h->plt.refcount > 0) 1558 { 1559 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; 1560 h->plt.refcount -= 1; 1561 } 1562 } 1563 else if (local_got_refcounts != NULL) 1564 { 1565 if (local_got_refcounts[r_symndx] > 0) 1566 local_got_refcounts[r_symndx] -= 1; 1567 } 1568 break; 1569 1570 default: 1571 break; 1572 } 1573 } 1574 1575 return TRUE; 1576} 1577 1578/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT 1579 entry but we found we will not create any. Called when we find we will 1580 not have any PLT for this symbol, by for example 1581 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, 1582 or elf_s390_size_dynamic_sections if no dynamic sections will be 1583 created (we're only linking static objects). */ 1584 1585static void 1586elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h) 1587{ 1588 if (h->elf.root.type == bfd_link_hash_warning) 1589 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; 1590 1591 if (h->gotplt_refcount <= 0) 1592 return; 1593 1594 /* We simply add the number of gotplt references to the number 1595 * of got references for this symbol. */ 1596 h->elf.got.refcount += h->gotplt_refcount; 1597 h->gotplt_refcount = -1; 1598} 1599 1600/* Adjust a symbol defined by a dynamic object and referenced by a 1601 regular object. The current definition is in some section of the 1602 dynamic object, but we're not including those sections. We have to 1603 change the definition to something the rest of the link can 1604 understand. */ 1605 1606static bfd_boolean 1607elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info, 1608 struct elf_link_hash_entry *h) 1609{ 1610 struct elf_s390_link_hash_table *htab; 1611 asection *s, *srel; 1612 1613 /* STT_GNU_IFUNC symbol must go through PLT. */ 1614 if (s390_is_ifunc_symbol_p (h)) 1615 { 1616 /* All local STT_GNU_IFUNC references must be treated as local 1617 calls via local PLT. */ 1618 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h)) 1619 { 1620 bfd_size_type pc_count = 0, count = 0; 1621 struct elf_dyn_relocs **pp; 1622 struct elf_s390_link_hash_entry *eh; 1623 struct elf_dyn_relocs *p; 1624 1625 eh = (struct elf_s390_link_hash_entry *) h; 1626 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 1627 { 1628 pc_count += p->pc_count; 1629 p->count -= p->pc_count; 1630 p->pc_count = 0; 1631 count += p->count; 1632 if (p->count == 0) 1633 *pp = p->next; 1634 else 1635 pp = &p->next; 1636 } 1637 1638 if (pc_count || count) 1639 { 1640 h->needs_plt = 1; 1641 h->non_got_ref = 1; 1642 if (h->plt.refcount <= 0) 1643 h->plt.refcount = 1; 1644 else 1645 h->plt.refcount += 1; 1646 } 1647 } 1648 1649 if (h->plt.refcount <= 0) 1650 { 1651 h->plt.offset = (bfd_vma) -1; 1652 h->needs_plt = 0; 1653 } 1654 return TRUE; 1655 } 1656 1657 /* If this is a function, put it in the procedure linkage table. We 1658 will fill in the contents of the procedure linkage table later 1659 (although we could actually do it here). */ 1660 if (h->type == STT_FUNC 1661 || h->needs_plt) 1662 { 1663 if (h->plt.refcount <= 0 1664 || SYMBOL_CALLS_LOCAL (info, h) 1665 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 1666 && h->root.type != bfd_link_hash_undefweak)) 1667 { 1668 /* This case can occur if we saw a PLT32 reloc in an input 1669 file, but the symbol was never referred to by a dynamic 1670 object, or if all references were garbage collected. In 1671 such a case, we don't actually need to build a procedure 1672 linkage table, and we can just do a PC32 reloc instead. */ 1673 h->plt.offset = (bfd_vma) -1; 1674 h->needs_plt = 0; 1675 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1676 } 1677 1678 return TRUE; 1679 } 1680 else 1681 /* It's possible that we incorrectly decided a .plt reloc was 1682 needed for an R_390_PC32 reloc to a non-function sym in 1683 check_relocs. We can't decide accurately between function and 1684 non-function syms in check-relocs; Objects loaded later in 1685 the link may change h->type. So fix it now. */ 1686 h->plt.offset = (bfd_vma) -1; 1687 1688 /* If this is a weak symbol, and there is a real definition, the 1689 processor independent code will have arranged for us to see the 1690 real definition first, and we can just use the same value. */ 1691 if (h->u.weakdef != NULL) 1692 { 1693 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 1694 || h->u.weakdef->root.type == bfd_link_hash_defweak); 1695 h->root.u.def.section = h->u.weakdef->root.u.def.section; 1696 h->root.u.def.value = h->u.weakdef->root.u.def.value; 1697 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) 1698 h->non_got_ref = h->u.weakdef->non_got_ref; 1699 return TRUE; 1700 } 1701 1702 /* This is a reference to a symbol defined by a dynamic object which 1703 is not a function. */ 1704 1705 /* If we are creating a shared library, we must presume that the 1706 only references to the symbol are via the global offset table. 1707 For such cases we need not do anything here; the relocations will 1708 be handled correctly by relocate_section. */ 1709 if (bfd_link_pic (info)) 1710 return TRUE; 1711 1712 /* If there are no references to this symbol that do not use the 1713 GOT, we don't need to generate a copy reloc. */ 1714 if (!h->non_got_ref) 1715 return TRUE; 1716 1717 /* If -z nocopyreloc was given, we won't generate them either. */ 1718 if (info->nocopyreloc) 1719 { 1720 h->non_got_ref = 0; 1721 return TRUE; 1722 } 1723 1724 if (ELIMINATE_COPY_RELOCS) 1725 { 1726 struct elf_s390_link_hash_entry * eh; 1727 struct elf_dyn_relocs *p; 1728 1729 eh = (struct elf_s390_link_hash_entry *) h; 1730 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1731 { 1732 s = p->sec->output_section; 1733 if (s != NULL && (s->flags & SEC_READONLY) != 0) 1734 break; 1735 } 1736 1737 /* If we didn't find any dynamic relocs in read-only sections, then 1738 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 1739 if (p == NULL) 1740 { 1741 h->non_got_ref = 0; 1742 return TRUE; 1743 } 1744 } 1745 1746 /* We must allocate the symbol in our .dynbss section, which will 1747 become part of the .bss section of the executable. There will be 1748 an entry for this symbol in the .dynsym section. The dynamic 1749 object will contain position independent code, so all references 1750 from the dynamic object to this symbol will go through the global 1751 offset table. The dynamic linker will use the .dynsym entry to 1752 determine the address it must put in the global offset table, so 1753 both the dynamic object and the regular object will refer to the 1754 same memory location for the variable. */ 1755 1756 htab = elf_s390_hash_table (info); 1757 1758 /* We must generate a R_390_COPY reloc to tell the dynamic linker to 1759 copy the initial value out of the dynamic object and into the 1760 runtime process image. */ 1761 if ((h->root.u.def.section->flags & SEC_READONLY) != 0) 1762 { 1763 s = htab->elf.sdynrelro; 1764 srel = htab->elf.sreldynrelro; 1765 } 1766 else 1767 { 1768 s = htab->elf.sdynbss; 1769 srel = htab->elf.srelbss; 1770 } 1771 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 1772 { 1773 srel->size += sizeof (Elf32_External_Rela); 1774 h->needs_copy = 1; 1775 } 1776 1777 return _bfd_elf_adjust_dynamic_copy (info, h, s); 1778} 1779 1780/* Allocate space in .plt, .got and associated reloc sections for 1781 dynamic relocs. */ 1782 1783static bfd_boolean 1784allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) 1785{ 1786 struct bfd_link_info *info; 1787 struct elf_s390_link_hash_table *htab; 1788 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h; 1789 struct elf_dyn_relocs *p; 1790 1791 if (h->root.type == bfd_link_hash_indirect) 1792 return TRUE; 1793 1794 info = (struct bfd_link_info *) inf; 1795 htab = elf_s390_hash_table (info); 1796 1797 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it 1798 here if it is defined and referenced in a non-shared object. */ 1799 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 1800 return s390_elf_allocate_ifunc_dyn_relocs (info, h); 1801 else if (htab->elf.dynamic_sections_created 1802 && h->plt.refcount > 0) 1803 { 1804 /* Make sure this symbol is output as a dynamic symbol. 1805 Undefined weak syms won't yet be marked as dynamic. */ 1806 if (h->dynindx == -1 1807 && !h->forced_local) 1808 { 1809 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1810 return FALSE; 1811 } 1812 1813 if (bfd_link_pic (info) 1814 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) 1815 { 1816 asection *s = htab->elf.splt; 1817 1818 /* If this is the first .plt entry, make room for the special 1819 first entry. */ 1820 if (s->size == 0) 1821 s->size += PLT_FIRST_ENTRY_SIZE; 1822 1823 h->plt.offset = s->size; 1824 1825 /* If this symbol is not defined in a regular file, and we are 1826 not generating a shared library, then set the symbol to this 1827 location in the .plt. This is required to make function 1828 pointers compare as equal between the normal executable and 1829 the shared library. */ 1830 if (! bfd_link_pic (info) 1831 && !h->def_regular) 1832 { 1833 h->root.u.def.section = s; 1834 h->root.u.def.value = h->plt.offset; 1835 } 1836 1837 /* Make room for this entry. */ 1838 s->size += PLT_ENTRY_SIZE; 1839 1840 /* We also need to make an entry in the .got.plt section, which 1841 will be placed in the .got section by the linker script. */ 1842 htab->elf.sgotplt->size += GOT_ENTRY_SIZE; 1843 1844 /* We also need to make an entry in the .rela.plt section. */ 1845 htab->elf.srelplt->size += sizeof (Elf32_External_Rela); 1846 } 1847 else 1848 { 1849 h->plt.offset = (bfd_vma) -1; 1850 h->needs_plt = 0; 1851 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1852 } 1853 } 1854 else 1855 { 1856 h->plt.offset = (bfd_vma) -1; 1857 h->needs_plt = 0; 1858 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1859 } 1860 1861 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to 1862 the binary, we can optimize a bit. IE32 and GOTIE32 get converted 1863 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT 1864 we can save the dynamic TLS relocation. */ 1865 if (h->got.refcount > 0 1866 && !bfd_link_pic (info) 1867 && h->dynindx == -1 1868 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) 1869 { 1870 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) 1871 /* For the GOTIE access without a literal pool entry the offset has 1872 to be stored somewhere. The immediate value in the instruction 1873 is not bit enough so the value is stored in the got. */ 1874 { 1875 h->got.offset = htab->elf.sgot->size; 1876 htab->elf.sgot->size += GOT_ENTRY_SIZE; 1877 } 1878 else 1879 h->got.offset = (bfd_vma) -1; 1880 } 1881 else if (h->got.refcount > 0) 1882 { 1883 asection *s; 1884 bfd_boolean dyn; 1885 int tls_type = elf_s390_hash_entry(h)->tls_type; 1886 1887 /* Make sure this symbol is output as a dynamic symbol. 1888 Undefined weak syms won't yet be marked as dynamic. */ 1889 if (h->dynindx == -1 1890 && !h->forced_local) 1891 { 1892 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1893 return FALSE; 1894 } 1895 1896 s = htab->elf.sgot; 1897 h->got.offset = s->size; 1898 s->size += GOT_ENTRY_SIZE; 1899 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */ 1900 if (tls_type == GOT_TLS_GD) 1901 s->size += GOT_ENTRY_SIZE; 1902 dyn = htab->elf.dynamic_sections_created; 1903 /* R_390_TLS_IE32 needs one dynamic relocation, 1904 R_390_TLS_GD32 needs one if local symbol and two if global. */ 1905 if ((tls_type == GOT_TLS_GD && h->dynindx == -1) 1906 || tls_type >= GOT_TLS_IE) 1907 htab->elf.srelgot->size += sizeof (Elf32_External_Rela); 1908 else if (tls_type == GOT_TLS_GD) 1909 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela); 1910 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1911 || h->root.type != bfd_link_hash_undefweak) 1912 && (bfd_link_pic (info) 1913 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) 1914 htab->elf.srelgot->size += sizeof (Elf32_External_Rela); 1915 } 1916 else 1917 h->got.offset = (bfd_vma) -1; 1918 1919 if (eh->dyn_relocs == NULL) 1920 return TRUE; 1921 1922 /* In the shared -Bsymbolic case, discard space allocated for 1923 dynamic pc-relative relocs against symbols which turn out to be 1924 defined in regular objects. For the normal shared case, discard 1925 space for pc-relative relocs that have become local due to symbol 1926 visibility changes. */ 1927 1928 if (bfd_link_pic (info)) 1929 { 1930 if (SYMBOL_CALLS_LOCAL (info, h)) 1931 { 1932 struct elf_dyn_relocs **pp; 1933 1934 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 1935 { 1936 p->count -= p->pc_count; 1937 p->pc_count = 0; 1938 if (p->count == 0) 1939 *pp = p->next; 1940 else 1941 pp = &p->next; 1942 } 1943 } 1944 1945 /* Also discard relocs on undefined weak syms with non-default 1946 visibility. */ 1947 if (eh->dyn_relocs != NULL 1948 && h->root.type == bfd_link_hash_undefweak) 1949 { 1950 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 1951 eh->dyn_relocs = NULL; 1952 1953 /* Make sure undefined weak symbols are output as a dynamic 1954 symbol in PIEs. */ 1955 else if (h->dynindx == -1 1956 && !h->forced_local) 1957 { 1958 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1959 return FALSE; 1960 } 1961 } 1962 } 1963 else if (ELIMINATE_COPY_RELOCS) 1964 { 1965 /* For the non-shared case, discard space for relocs against 1966 symbols which turn out to need copy relocs or are not 1967 dynamic. */ 1968 1969 if (!h->non_got_ref 1970 && ((h->def_dynamic 1971 && !h->def_regular) 1972 || (htab->elf.dynamic_sections_created 1973 && (h->root.type == bfd_link_hash_undefweak 1974 || h->root.type == bfd_link_hash_undefined)))) 1975 { 1976 /* Make sure this symbol is output as a dynamic symbol. 1977 Undefined weak syms won't yet be marked as dynamic. */ 1978 if (h->dynindx == -1 1979 && !h->forced_local) 1980 { 1981 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1982 return FALSE; 1983 } 1984 1985 /* If that succeeded, we know we'll be keeping all the 1986 relocs. */ 1987 if (h->dynindx != -1) 1988 goto keep; 1989 } 1990 1991 eh->dyn_relocs = NULL; 1992 1993 keep: ; 1994 } 1995 1996 /* Finally, allocate space. */ 1997 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1998 { 1999 asection *sreloc = elf_section_data (p->sec)->sreloc; 2000 2001 sreloc->size += p->count * sizeof (Elf32_External_Rela); 2002 } 2003 2004 return TRUE; 2005} 2006 2007/* Find any dynamic relocs that apply to read-only sections. */ 2008 2009static bfd_boolean 2010readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) 2011{ 2012 struct elf_s390_link_hash_entry *eh; 2013 struct elf_dyn_relocs *p; 2014 2015 eh = (struct elf_s390_link_hash_entry *) h; 2016 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2017 { 2018 asection *s = p->sec->output_section; 2019 2020 if (s != NULL && (s->flags & SEC_READONLY) != 0) 2021 { 2022 struct bfd_link_info *info = (struct bfd_link_info *) inf; 2023 2024 info->flags |= DF_TEXTREL; 2025 2026 /* Not an error, just cut short the traversal. */ 2027 return FALSE; 2028 } 2029 } 2030 return TRUE; 2031} 2032 2033/* Set the sizes of the dynamic sections. */ 2034 2035static bfd_boolean 2036elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 2037 struct bfd_link_info *info) 2038{ 2039 struct elf_s390_link_hash_table *htab; 2040 bfd *dynobj; 2041 asection *s; 2042 bfd_boolean relocs; 2043 bfd *ibfd; 2044 2045 htab = elf_s390_hash_table (info); 2046 dynobj = htab->elf.dynobj; 2047 if (dynobj == NULL) 2048 abort (); 2049 2050 if (htab->elf.dynamic_sections_created) 2051 { 2052 /* Set the contents of the .interp section to the interpreter. */ 2053 if (bfd_link_executable (info) && !info->nointerp) 2054 { 2055 s = bfd_get_linker_section (dynobj, ".interp"); 2056 if (s == NULL) 2057 abort (); 2058 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 2059 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 2060 } 2061 } 2062 2063 /* Set up .got offsets for local syms, and space for local dynamic 2064 relocs. */ 2065 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 2066 { 2067 bfd_signed_vma *local_got; 2068 bfd_signed_vma *end_local_got; 2069 char *local_tls_type; 2070 bfd_size_type locsymcount; 2071 Elf_Internal_Shdr *symtab_hdr; 2072 asection *srela; 2073 struct plt_entry *local_plt; 2074 unsigned int i; 2075 2076 if (! is_s390_elf (ibfd)) 2077 continue; 2078 2079 for (s = ibfd->sections; s != NULL; s = s->next) 2080 { 2081 struct elf_dyn_relocs *p; 2082 2083 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) 2084 { 2085 if (!bfd_is_abs_section (p->sec) 2086 && bfd_is_abs_section (p->sec->output_section)) 2087 { 2088 /* Input section has been discarded, either because 2089 it is a copy of a linkonce section or due to 2090 linker script /DISCARD/, so we'll be discarding 2091 the relocs too. */ 2092 } 2093 else if (p->count != 0) 2094 { 2095 srela = elf_section_data (p->sec)->sreloc; 2096 srela->size += p->count * sizeof (Elf32_External_Rela); 2097 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2098 info->flags |= DF_TEXTREL; 2099 } 2100 } 2101 } 2102 2103 local_got = elf_local_got_refcounts (ibfd); 2104 if (!local_got) 2105 continue; 2106 2107 symtab_hdr = &elf_symtab_hdr (ibfd); 2108 locsymcount = symtab_hdr->sh_info; 2109 end_local_got = local_got + locsymcount; 2110 local_tls_type = elf_s390_local_got_tls_type (ibfd); 2111 s = htab->elf.sgot; 2112 srela = htab->elf.srelgot; 2113 for (; local_got < end_local_got; ++local_got, ++local_tls_type) 2114 { 2115 if (*local_got > 0) 2116 { 2117 *local_got = s->size; 2118 s->size += GOT_ENTRY_SIZE; 2119 if (*local_tls_type == GOT_TLS_GD) 2120 s->size += GOT_ENTRY_SIZE; 2121 if (bfd_link_pic (info)) 2122 srela->size += sizeof (Elf32_External_Rela); 2123 } 2124 else 2125 *local_got = (bfd_vma) -1; 2126 } 2127 local_plt = elf_s390_local_plt (ibfd); 2128 for (i = 0; i < symtab_hdr->sh_info; i++) 2129 { 2130 if (local_plt[i].plt.refcount > 0) 2131 { 2132 local_plt[i].plt.offset = htab->elf.iplt->size; 2133 htab->elf.iplt->size += PLT_ENTRY_SIZE; 2134 htab->elf.igotplt->size += GOT_ENTRY_SIZE; 2135 htab->elf.irelplt->size += RELA_ENTRY_SIZE; 2136 } 2137 else 2138 local_plt[i].plt.offset = (bfd_vma) -1; 2139 } 2140 } 2141 2142 if (htab->tls_ldm_got.refcount > 0) 2143 { 2144 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32 2145 relocs. */ 2146 htab->tls_ldm_got.offset = htab->elf.sgot->size; 2147 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; 2148 htab->elf.srelgot->size += sizeof (Elf32_External_Rela); 2149 } 2150 else 2151 htab->tls_ldm_got.offset = -1; 2152 2153 /* Allocate global sym .plt and .got entries, and space for global 2154 sym dynamic relocs. */ 2155 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); 2156 2157 /* We now have determined the sizes of the various dynamic sections. 2158 Allocate memory for them. */ 2159 relocs = FALSE; 2160 for (s = dynobj->sections; s != NULL; s = s->next) 2161 { 2162 if ((s->flags & SEC_LINKER_CREATED) == 0) 2163 continue; 2164 2165 if (s == htab->elf.splt 2166 || s == htab->elf.sgot 2167 || s == htab->elf.sgotplt 2168 || s == htab->elf.sdynbss 2169 || s == htab->elf.sdynrelro 2170 || s == htab->elf.iplt 2171 || s == htab->elf.igotplt 2172 || s == htab->irelifunc) 2173 { 2174 /* Strip this section if we don't need it; see the 2175 comment below. */ 2176 } 2177 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) 2178 { 2179 if (s->size != 0) 2180 relocs = TRUE; 2181 2182 /* We use the reloc_count field as a counter if we need 2183 to copy relocs into the output file. */ 2184 s->reloc_count = 0; 2185 } 2186 else 2187 { 2188 /* It's not one of our sections, so don't allocate space. */ 2189 continue; 2190 } 2191 2192 if (s->size == 0) 2193 { 2194 /* If we don't need this section, strip it from the 2195 output file. This is to handle .rela.bss and 2196 .rela.plt. We must create it in 2197 create_dynamic_sections, because it must be created 2198 before the linker maps input sections to output 2199 sections. The linker does that before 2200 adjust_dynamic_symbol is called, and it is that 2201 function which decides whether anything needs to go 2202 into these sections. */ 2203 2204 s->flags |= SEC_EXCLUDE; 2205 continue; 2206 } 2207 2208 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2209 continue; 2210 2211 /* Allocate memory for the section contents. We use bfd_zalloc 2212 here in case unused entries are not reclaimed before the 2213 section's contents are written out. This should not happen, 2214 but this way if it does, we get a R_390_NONE reloc instead 2215 of garbage. */ 2216 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 2217 if (s->contents == NULL) 2218 return FALSE; 2219 } 2220 2221 if (htab->elf.dynamic_sections_created) 2222 { 2223 /* Add some entries to the .dynamic section. We fill in the 2224 values later, in elf_s390_finish_dynamic_sections, but we 2225 must add the entries now so that we get the correct size for 2226 the .dynamic section. The DT_DEBUG entry is filled in by the 2227 dynamic linker and used by the debugger. */ 2228#define add_dynamic_entry(TAG, VAL) \ 2229 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2230 2231 if (bfd_link_executable (info)) 2232 { 2233 if (!add_dynamic_entry (DT_DEBUG, 0)) 2234 return FALSE; 2235 } 2236 2237 if (htab->elf.splt->size != 0) 2238 { 2239 if (!add_dynamic_entry (DT_PLTGOT, 0) 2240 || !add_dynamic_entry (DT_PLTRELSZ, 0) 2241 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 2242 || !add_dynamic_entry (DT_JMPREL, 0)) 2243 return FALSE; 2244 } 2245 2246 if (relocs) 2247 { 2248 if (!add_dynamic_entry (DT_RELA, 0) 2249 || !add_dynamic_entry (DT_RELASZ, 0) 2250 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 2251 return FALSE; 2252 2253 /* If any dynamic relocs apply to a read-only section, 2254 then we need a DT_TEXTREL entry. */ 2255 if ((info->flags & DF_TEXTREL) == 0) 2256 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info); 2257 2258 if ((info->flags & DF_TEXTREL) != 0) 2259 { 2260 if (!add_dynamic_entry (DT_TEXTREL, 0)) 2261 return FALSE; 2262 } 2263 } 2264 } 2265#undef add_dynamic_entry 2266 2267 return TRUE; 2268} 2269 2270/* Return the base VMA address which should be subtracted from real addresses 2271 when resolving @dtpoff relocation. 2272 This is PT_TLS segment p_vaddr. */ 2273 2274static bfd_vma 2275dtpoff_base (struct bfd_link_info *info) 2276{ 2277 /* If tls_sec is NULL, we should have signalled an error already. */ 2278 if (elf_hash_table (info)->tls_sec == NULL) 2279 return 0; 2280 return elf_hash_table (info)->tls_sec->vma; 2281} 2282 2283/* Return the relocation value for @tpoff relocation 2284 if STT_TLS virtual address is ADDRESS. */ 2285 2286static bfd_vma 2287tpoff (struct bfd_link_info *info, bfd_vma address) 2288{ 2289 struct elf_link_hash_table *htab = elf_hash_table (info); 2290 2291 /* If tls_sec is NULL, we should have signalled an error already. */ 2292 if (htab->tls_sec == NULL) 2293 return 0; 2294 return htab->tls_size + htab->tls_sec->vma - address; 2295} 2296 2297/* Complain if TLS instruction relocation is against an invalid 2298 instruction. */ 2299 2300static void 2301invalid_tls_insn (bfd *input_bfd, 2302 asection *input_section, 2303 Elf_Internal_Rela *rel) 2304{ 2305 reloc_howto_type *howto; 2306 2307 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info); 2308 _bfd_error_handler 2309 /* xgettext:c-format */ 2310 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"), 2311 input_bfd, 2312 input_section, 2313 (long) rel->r_offset, 2314 howto->name); 2315 bfd_set_error (bfd_error_bad_value); 2316} 2317 2318/* Relocate a 390 ELF section. */ 2319 2320static bfd_boolean 2321elf_s390_relocate_section (bfd *output_bfd, 2322 struct bfd_link_info *info, 2323 bfd *input_bfd, 2324 asection *input_section, 2325 bfd_byte *contents, 2326 Elf_Internal_Rela *relocs, 2327 Elf_Internal_Sym *local_syms, 2328 asection **local_sections) 2329{ 2330 struct elf_s390_link_hash_table *htab; 2331 Elf_Internal_Shdr *symtab_hdr; 2332 struct elf_link_hash_entry **sym_hashes; 2333 bfd_vma *local_got_offsets; 2334 Elf_Internal_Rela *rel; 2335 Elf_Internal_Rela *relend; 2336 2337 BFD_ASSERT (is_s390_elf (input_bfd)); 2338 2339 htab = elf_s390_hash_table (info); 2340 symtab_hdr = &elf_symtab_hdr (input_bfd); 2341 sym_hashes = elf_sym_hashes (input_bfd); 2342 local_got_offsets = elf_local_got_offsets (input_bfd); 2343 2344 rel = relocs; 2345 relend = relocs + input_section->reloc_count; 2346 for (; rel < relend; rel++) 2347 { 2348 unsigned int r_type; 2349 reloc_howto_type *howto; 2350 unsigned long r_symndx; 2351 struct elf_link_hash_entry *h; 2352 Elf_Internal_Sym *sym; 2353 asection *sec; 2354 bfd_vma off; 2355 bfd_vma relocation; 2356 bfd_boolean unresolved_reloc; 2357 bfd_reloc_status_type r; 2358 int tls_type; 2359 asection *base_got = htab->elf.sgot; 2360 2361 r_type = ELF32_R_TYPE (rel->r_info); 2362 if (r_type == (int) R_390_GNU_VTINHERIT 2363 || r_type == (int) R_390_GNU_VTENTRY) 2364 continue; 2365 if (r_type >= (int) R_390_max) 2366 { 2367 bfd_set_error (bfd_error_bad_value); 2368 return FALSE; 2369 } 2370 2371 howto = elf_howto_table + r_type; 2372 r_symndx = ELF32_R_SYM (rel->r_info); 2373 2374 h = NULL; 2375 sym = NULL; 2376 sec = NULL; 2377 unresolved_reloc = FALSE; 2378 if (r_symndx < symtab_hdr->sh_info) 2379 { 2380 sym = local_syms + r_symndx; 2381 sec = local_sections[r_symndx]; 2382 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 2383 { 2384 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd); 2385 if (local_plt == NULL) 2386 return FALSE; 2387 2388 /* Address of the PLT slot. */ 2389 relocation = (htab->elf.iplt->output_section->vma 2390 + htab->elf.iplt->output_offset 2391 + local_plt[r_symndx].plt.offset); 2392 2393 switch (r_type) 2394 { 2395 case R_390_PLTOFF16: 2396 case R_390_PLTOFF32: 2397 relocation -= htab->elf.sgot->output_section->vma; 2398 break; 2399 case R_390_GOTPLT12: 2400 case R_390_GOTPLT16: 2401 case R_390_GOTPLT20: 2402 case R_390_GOTPLT32: 2403 case R_390_GOTPLTENT: 2404 case R_390_GOT12: 2405 case R_390_GOT16: 2406 case R_390_GOT20: 2407 case R_390_GOT32: 2408 case R_390_GOTENT: 2409 { 2410 /* Write the PLT slot address into the GOT slot. */ 2411 bfd_put_32 (output_bfd, relocation, 2412 htab->elf.sgot->contents + 2413 local_got_offsets[r_symndx]); 2414 relocation = (local_got_offsets[r_symndx] + 2415 htab->elf.sgot->output_offset); 2416 2417 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) 2418 relocation += htab->elf.sgot->output_section->vma; 2419 break; 2420 } 2421 default: 2422 break; 2423 } 2424 /* The output section is needed later in 2425 finish_dynamic_section when creating the dynamic 2426 relocation. */ 2427 local_plt[r_symndx].sec = sec; 2428 goto do_relocation; 2429 } 2430 else 2431 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2432 } 2433 else 2434 { 2435 bfd_boolean warned ATTRIBUTE_UNUSED; 2436 bfd_boolean ignored ATTRIBUTE_UNUSED; 2437 2438 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 2439 r_symndx, symtab_hdr, sym_hashes, 2440 h, sec, relocation, 2441 unresolved_reloc, warned, ignored); 2442 } 2443 2444 if (sec != NULL && discarded_section (sec)) 2445 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2446 rel, 1, relend, howto, 0, contents); 2447 2448 if (bfd_link_relocatable (info)) 2449 continue; 2450 2451 switch (r_type) 2452 { 2453 case R_390_GOTPLT12: 2454 case R_390_GOTPLT16: 2455 case R_390_GOTPLT20: 2456 case R_390_GOTPLT32: 2457 case R_390_GOTPLTENT: 2458 /* There are three cases for a GOTPLT relocation. 1) The 2459 relocation is against the jump slot entry of a plt that 2460 will get emitted to the output file. 2) The relocation 2461 is against the jump slot of a plt entry that has been 2462 removed. elf_s390_adjust_gotplt has created a GOT entry 2463 as replacement. 3) The relocation is against a local symbol. 2464 Cases 2) and 3) are the same as the GOT relocation code 2465 so we just have to test for case 1 and fall through for 2466 the other two. */ 2467 if (h != NULL && h->plt.offset != (bfd_vma) -1) 2468 { 2469 bfd_vma plt_index; 2470 2471 if (s390_is_ifunc_symbol_p (h)) 2472 { 2473 plt_index = h->plt.offset / PLT_ENTRY_SIZE; 2474 relocation = (plt_index * GOT_ENTRY_SIZE + 2475 htab->elf.igotplt->output_offset); 2476 if (r_type == R_390_GOTPLTENT) 2477 relocation += htab->elf.igotplt->output_section->vma; 2478 } 2479 else 2480 { 2481 /* Calc. index no. 2482 Current offset - size first entry / entry size. */ 2483 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / 2484 PLT_ENTRY_SIZE; 2485 2486 /* Offset in GOT is PLT index plus GOT headers(3) 2487 times 4, addr & GOT addr. */ 2488 relocation = (plt_index + 3) * GOT_ENTRY_SIZE; 2489 if (r_type == R_390_GOTPLTENT) 2490 relocation += htab->elf.sgot->output_section->vma; 2491 } 2492 unresolved_reloc = FALSE; 2493 2494 } 2495 /* Fall through. */ 2496 2497 case R_390_GOT12: 2498 case R_390_GOT16: 2499 case R_390_GOT20: 2500 case R_390_GOT32: 2501 case R_390_GOTENT: 2502 /* Relocation is to the entry for this symbol in the global 2503 offset table. */ 2504 if (base_got == NULL) 2505 abort (); 2506 2507 if (h != NULL) 2508 { 2509 bfd_boolean dyn; 2510 2511 off = h->got.offset; 2512 dyn = htab->elf.dynamic_sections_created; 2513 2514 if (s390_is_ifunc_symbol_p (h)) 2515 { 2516 BFD_ASSERT (h->plt.offset != (bfd_vma) -1); 2517 if (off == (bfd_vma)-1) 2518 { 2519 /* No explicit GOT usage so redirect to the 2520 got.iplt slot. */ 2521 base_got = htab->elf.igotplt; 2522 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE; 2523 } 2524 else 2525 { 2526 /* Explicit GOT slots must contain the address 2527 of the PLT slot. This will be handled in 2528 finish_dynamic_symbol. */ 2529 } 2530 } 2531 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 2532 bfd_link_pic (info), 2533 h) 2534 || (bfd_link_pic (info) 2535 && SYMBOL_REFERENCES_LOCAL (info, h)) 2536 || (ELF_ST_VISIBILITY (h->other) 2537 && h->root.type == bfd_link_hash_undefweak)) 2538 2539 { 2540 /* This is actually a static link, or it is a 2541 -Bsymbolic link and the symbol is defined 2542 locally, or the symbol was forced to be local 2543 because of a version file. We must initialize 2544 this entry in the global offset table. Since the 2545 offset must always be a multiple of 2, we use the 2546 least significant bit to record whether we have 2547 initialized it already. 2548 2549 When doing a dynamic link, we create a .rel.got 2550 relocation entry to initialize the value. This 2551 is done in the finish_dynamic_symbol routine. */ 2552 if ((off & 1) != 0) 2553 off &= ~1; 2554 else 2555 { 2556 bfd_put_32 (output_bfd, relocation, 2557 base_got->contents + off); 2558 h->got.offset |= 1; 2559 } 2560 2561 if ((h->def_regular 2562 && bfd_link_pic (info) 2563 && SYMBOL_REFERENCES_LOCAL (info, h)) 2564 /* lrl rx,sym@GOTENT -> larl rx, sym */ 2565 && ((r_type == R_390_GOTENT 2566 && (bfd_get_16 (input_bfd, 2567 contents + rel->r_offset - 2) 2568 & 0xff0f) == 0xc40d) 2569 /* ly rx, sym@GOT(r12) -> larl rx, sym */ 2570 || (r_type == R_390_GOT20 2571 && (bfd_get_32 (input_bfd, 2572 contents + rel->r_offset - 2) 2573 & 0xff00f000) == 0xe300c000 2574 && bfd_get_8 (input_bfd, 2575 contents + rel->r_offset + 3) == 0x58))) 2576 { 2577 unsigned short new_insn = 2578 (0xc000 | (bfd_get_8 (input_bfd, 2579 contents + rel->r_offset - 1) & 0xf0)); 2580 bfd_put_16 (output_bfd, new_insn, 2581 contents + rel->r_offset - 2); 2582 r_type = R_390_PC32DBL; 2583 rel->r_addend = 2; 2584 howto = elf_howto_table + r_type; 2585 relocation = h->root.u.def.value 2586 + h->root.u.def.section->output_section->vma 2587 + h->root.u.def.section->output_offset; 2588 goto do_relocation; 2589 } 2590 } 2591 else 2592 unresolved_reloc = FALSE; 2593 } 2594 else 2595 { 2596 if (local_got_offsets == NULL) 2597 abort (); 2598 2599 off = local_got_offsets[r_symndx]; 2600 2601 /* The offset must always be a multiple of 4. We use 2602 the least significant bit to record whether we have 2603 already generated the necessary reloc. */ 2604 if ((off & 1) != 0) 2605 off &= ~1; 2606 else 2607 { 2608 bfd_put_32 (output_bfd, relocation, 2609 htab->elf.sgot->contents + off); 2610 2611 if (bfd_link_pic (info)) 2612 { 2613 asection *srelgot; 2614 Elf_Internal_Rela outrel; 2615 bfd_byte *loc; 2616 2617 srelgot = htab->elf.srelgot; 2618 if (srelgot == NULL) 2619 abort (); 2620 2621 outrel.r_offset = (htab->elf.sgot->output_section->vma 2622 + htab->elf.sgot->output_offset 2623 + off); 2624 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 2625 outrel.r_addend = relocation; 2626 loc = srelgot->contents; 2627 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 2628 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2629 } 2630 2631 local_got_offsets[r_symndx] |= 1; 2632 } 2633 } 2634 2635 if (off >= (bfd_vma) -2) 2636 abort (); 2637 2638 relocation = base_got->output_offset + off; 2639 2640 /* For @GOTENT the relocation is against the offset between 2641 the instruction and the symbols entry in the GOT and not 2642 between the start of the GOT and the symbols entry. We 2643 add the vma of the GOT to get the correct value. */ 2644 if ( r_type == R_390_GOTENT 2645 || r_type == R_390_GOTPLTENT) 2646 relocation += base_got->output_section->vma; 2647 2648 break; 2649 2650 case R_390_GOTOFF16: 2651 case R_390_GOTOFF32: 2652 /* Relocation is relative to the start of the global offset 2653 table. */ 2654 2655 if (h != NULL 2656 && s390_is_ifunc_symbol_p (h) 2657 && h->def_regular 2658 && !bfd_link_executable (info)) 2659 { 2660 relocation = (htab->elf.iplt->output_section->vma 2661 + htab->elf.iplt->output_offset 2662 + h->plt.offset 2663 - htab->elf.sgot->output_section->vma); 2664 goto do_relocation; 2665 } 2666 2667 /* Note that sgot->output_offset is not involved in this 2668 calculation. We always want the start of .got. If we 2669 defined _GLOBAL_OFFSET_TABLE in a different way, as is 2670 permitted by the ABI, we might have to change this 2671 calculation. */ 2672 relocation -= htab->elf.sgot->output_section->vma; 2673 break; 2674 2675 case R_390_GOTPC: 2676 case R_390_GOTPCDBL: 2677 /* Use global offset table as symbol value. */ 2678 relocation = htab->elf.sgot->output_section->vma; 2679 unresolved_reloc = FALSE; 2680 break; 2681 2682 case R_390_PLT12DBL: 2683 case R_390_PLT16DBL: 2684 case R_390_PLT24DBL: 2685 case R_390_PLT32DBL: 2686 case R_390_PLT32: 2687 /* Relocation is to the entry for this symbol in the 2688 procedure linkage table. */ 2689 2690 /* Resolve a PLT32 reloc against a local symbol directly, 2691 without using the procedure linkage table. */ 2692 if (h == NULL) 2693 break; 2694 2695 if (h->plt.offset == (bfd_vma) -1 2696 || (htab->elf.splt == NULL && htab->elf.iplt == NULL)) 2697 { 2698 /* We didn't make a PLT entry for this symbol. This 2699 happens when statically linking PIC code, or when 2700 using -Bsymbolic. */ 2701 break; 2702 } 2703 2704 if (s390_is_ifunc_symbol_p (h)) 2705 relocation = (htab->elf.iplt->output_section->vma 2706 + htab->elf.iplt->output_offset 2707 + h->plt.offset); 2708 else 2709 relocation = (htab->elf.splt->output_section->vma 2710 + htab->elf.splt->output_offset 2711 + h->plt.offset); 2712 unresolved_reloc = FALSE; 2713 break; 2714 2715 case R_390_PLTOFF16: 2716 case R_390_PLTOFF32: 2717 /* Relocation is to the entry for this symbol in the 2718 procedure linkage table relative to the start of the GOT. */ 2719 2720 /* For local symbols or if we didn't make a PLT entry for 2721 this symbol resolve the symbol directly. */ 2722 if (h == NULL 2723 || h->plt.offset == (bfd_vma) -1 2724 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) 2725 { 2726 relocation -= htab->elf.sgot->output_section->vma; 2727 break; 2728 } 2729 2730 if (s390_is_ifunc_symbol_p (h)) 2731 relocation = (htab->elf.iplt->output_section->vma 2732 + htab->elf.iplt->output_offset 2733 + h->plt.offset 2734 - htab->elf.sgot->output_section->vma); 2735 else 2736 relocation = (htab->elf.splt->output_section->vma 2737 + htab->elf.splt->output_offset 2738 + h->plt.offset 2739 - htab->elf.sgot->output_section->vma); 2740 unresolved_reloc = FALSE; 2741 break; 2742 2743 case R_390_PC16: 2744 case R_390_PC12DBL: 2745 case R_390_PC16DBL: 2746 case R_390_PC24DBL: 2747 case R_390_PC32DBL: 2748 case R_390_PC32: 2749 if (h != NULL 2750 && s390_is_ifunc_symbol_p (h) 2751 && h->def_regular 2752 && !bfd_link_executable (info)) 2753 { 2754 /* This will not work our if the function does not 2755 happen to set up the GOT pointer for some other 2756 reason. 31 bit PLT entries require r12 to hold the 2757 GOT pointer. 2758 FIXME: Implement an errorcheck. 2759 NOTE: It will work when brasl is not available 2760 (e.g. with -m31 -march=g5) since a local function 2761 call then does use GOTOFF which implies r12 being set 2762 up. */ 2763 relocation = (htab->elf.iplt->output_section->vma 2764 + htab->elf.iplt->output_offset 2765 + h ->plt.offset); 2766 goto do_relocation; 2767 } 2768 /* Fall through. */ 2769 2770 case R_390_8: 2771 case R_390_16: 2772 case R_390_32: 2773 if (h != NULL 2774 && s390_is_ifunc_symbol_p (h) 2775 && h->def_regular) 2776 { 2777 if (!bfd_link_pic (info) || !h->non_got_ref) 2778 { 2779 /* For a non-shared object STT_GNU_IFUNC symbol must 2780 go through PLT. */ 2781 relocation = (htab->elf.iplt->output_section->vma 2782 + htab->elf.iplt->output_offset 2783 + h ->plt.offset); 2784 goto do_relocation; 2785 } 2786 else 2787 { 2788 /* For shared objects a runtime relocation is needed. */ 2789 2790 Elf_Internal_Rela outrel; 2791 asection *sreloc; 2792 2793 /* Need a dynamic relocation to get the real function 2794 address. */ 2795 outrel.r_offset = _bfd_elf_section_offset (output_bfd, 2796 info, 2797 input_section, 2798 rel->r_offset); 2799 if (outrel.r_offset == (bfd_vma) -1 2800 || outrel.r_offset == (bfd_vma) -2) 2801 abort (); 2802 2803 outrel.r_offset += (input_section->output_section->vma 2804 + input_section->output_offset); 2805 2806 if (h->dynindx == -1 2807 || h->forced_local 2808 || bfd_link_executable (info)) 2809 { 2810 /* This symbol is resolved locally. */ 2811 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE); 2812 outrel.r_addend = (h->root.u.def.value 2813 + h->root.u.def.section->output_section->vma 2814 + h->root.u.def.section->output_offset); 2815 } 2816 else 2817 { 2818 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 2819 outrel.r_addend = 0; 2820 } 2821 2822 sreloc = htab->elf.irelifunc; 2823 elf_append_rela (output_bfd, sreloc, &outrel); 2824 2825 /* If this reloc is against an external symbol, we 2826 do not want to fiddle with the addend. Otherwise, 2827 we need to include the symbol value so that it 2828 becomes an addend for the dynamic reloc. For an 2829 internal symbol, we have updated addend. */ 2830 continue; 2831 } 2832 } 2833 2834 if ((input_section->flags & SEC_ALLOC) == 0) 2835 break; 2836 2837 if ((bfd_link_pic (info) 2838 && (h == NULL 2839 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 2840 || h->root.type != bfd_link_hash_undefweak) 2841 && ((r_type != R_390_PC16 2842 && r_type != R_390_PC12DBL 2843 && r_type != R_390_PC16DBL 2844 && r_type != R_390_PC24DBL 2845 && r_type != R_390_PC32DBL 2846 && r_type != R_390_PC32) 2847 || !SYMBOL_CALLS_LOCAL (info, h))) 2848 || (ELIMINATE_COPY_RELOCS 2849 && !bfd_link_pic (info) 2850 && h != NULL 2851 && h->dynindx != -1 2852 && !h->non_got_ref 2853 && ((h->def_dynamic 2854 && !h->def_regular) 2855 || h->root.type == bfd_link_hash_undefweak 2856 || h->root.type == bfd_link_hash_undefined))) 2857 { 2858 Elf_Internal_Rela outrel; 2859 bfd_boolean skip, relocate; 2860 asection *sreloc; 2861 bfd_byte *loc; 2862 2863 /* When generating a shared object, these relocations 2864 are copied into the output file to be resolved at run 2865 time. */ 2866 2867 skip = FALSE; 2868 relocate = FALSE; 2869 2870 outrel.r_offset = 2871 _bfd_elf_section_offset (output_bfd, info, input_section, 2872 rel->r_offset); 2873 if (outrel.r_offset == (bfd_vma) -1) 2874 skip = TRUE; 2875 else if (outrel.r_offset == (bfd_vma) -2) 2876 skip = TRUE, relocate = TRUE; 2877 outrel.r_offset += (input_section->output_section->vma 2878 + input_section->output_offset); 2879 2880 if (skip) 2881 memset (&outrel, 0, sizeof outrel); 2882 else if (h != NULL 2883 && h->dynindx != -1 2884 && (r_type == R_390_PC16 2885 || r_type == R_390_PC12DBL 2886 || r_type == R_390_PC16DBL 2887 || r_type == R_390_PC24DBL 2888 || r_type == R_390_PC32DBL 2889 || r_type == R_390_PC32 2890 || !bfd_link_pic (info) 2891 || !SYMBOLIC_BIND (info, h) 2892 || !h->def_regular)) 2893 { 2894 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 2895 outrel.r_addend = rel->r_addend; 2896 } 2897 else 2898 { 2899 /* This symbol is local, or marked to become local. */ 2900 outrel.r_addend = relocation + rel->r_addend; 2901 if (r_type == R_390_32) 2902 { 2903 relocate = TRUE; 2904 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 2905 } 2906 else 2907 { 2908 long sindx; 2909 2910 if (bfd_is_abs_section (sec)) 2911 sindx = 0; 2912 else if (sec == NULL || sec->owner == NULL) 2913 { 2914 bfd_set_error(bfd_error_bad_value); 2915 return FALSE; 2916 } 2917 else 2918 { 2919 asection *osec; 2920 2921 osec = sec->output_section; 2922 sindx = elf_section_data (osec)->dynindx; 2923 if (sindx == 0) 2924 { 2925 osec = htab->elf.text_index_section; 2926 sindx = elf_section_data (osec)->dynindx; 2927 } 2928 BFD_ASSERT (sindx != 0); 2929 2930 /* We are turning this relocation into one 2931 against a section symbol, so subtract out 2932 the output section's address but not the 2933 offset of the input section in the output 2934 section. */ 2935 outrel.r_addend -= osec->vma; 2936 } 2937 outrel.r_info = ELF32_R_INFO (sindx, r_type); 2938 } 2939 } 2940 2941 sreloc = elf_section_data (input_section)->sreloc; 2942 if (sreloc == NULL) 2943 abort (); 2944 2945 loc = sreloc->contents; 2946 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 2947 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2948 2949 /* If this reloc is against an external symbol, we do 2950 not want to fiddle with the addend. Otherwise, we 2951 need to include the symbol value so that it becomes 2952 an addend for the dynamic reloc. */ 2953 if (! relocate) 2954 continue; 2955 } 2956 break; 2957 2958 /* Relocations for tls literal pool entries. */ 2959 case R_390_TLS_IE32: 2960 if (bfd_link_pic (info)) 2961 { 2962 Elf_Internal_Rela outrel; 2963 asection *sreloc; 2964 bfd_byte *loc; 2965 2966 outrel.r_offset = rel->r_offset 2967 + input_section->output_section->vma 2968 + input_section->output_offset; 2969 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 2970 sreloc = elf_section_data (input_section)->sreloc; 2971 if (sreloc == NULL) 2972 abort (); 2973 loc = sreloc->contents; 2974 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 2975 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); 2976 } 2977 /* Fall through. */ 2978 2979 case R_390_TLS_GD32: 2980 case R_390_TLS_GOTIE32: 2981 r_type = elf_s390_tls_transition (info, r_type, h == NULL); 2982 tls_type = GOT_UNKNOWN; 2983 if (h == NULL && local_got_offsets) 2984 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 2985 else if (h != NULL) 2986 { 2987 tls_type = elf_s390_hash_entry(h)->tls_type; 2988 if (!bfd_link_pic (info) 2989 && h->dynindx == -1 2990 && tls_type >= GOT_TLS_IE) 2991 r_type = R_390_TLS_LE32; 2992 } 2993 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE) 2994 r_type = R_390_TLS_IE32; 2995 2996 if (r_type == R_390_TLS_LE32) 2997 { 2998 /* This relocation gets optimized away by the local exec 2999 access optimization. */ 3000 BFD_ASSERT (! unresolved_reloc); 3001 bfd_put_32 (output_bfd, -tpoff (info, relocation), 3002 contents + rel->r_offset); 3003 continue; 3004 } 3005 3006 if (htab->elf.sgot == NULL) 3007 abort (); 3008 3009 if (h != NULL) 3010 off = h->got.offset; 3011 else 3012 { 3013 if (local_got_offsets == NULL) 3014 abort (); 3015 3016 off = local_got_offsets[r_symndx]; 3017 } 3018 3019 emit_tls_relocs: 3020 3021 if ((off & 1) != 0) 3022 off &= ~1; 3023 else 3024 { 3025 Elf_Internal_Rela outrel; 3026 bfd_byte *loc; 3027 int dr_type, indx; 3028 3029 if (htab->elf.srelgot == NULL) 3030 abort (); 3031 3032 outrel.r_offset = (htab->elf.sgot->output_section->vma 3033 + htab->elf.sgot->output_offset + off); 3034 3035 indx = h && h->dynindx != -1 ? h->dynindx : 0; 3036 if (r_type == R_390_TLS_GD32) 3037 dr_type = R_390_TLS_DTPMOD; 3038 else 3039 dr_type = R_390_TLS_TPOFF; 3040 if (dr_type == R_390_TLS_TPOFF && indx == 0) 3041 outrel.r_addend = relocation - dtpoff_base (info); 3042 else 3043 outrel.r_addend = 0; 3044 outrel.r_info = ELF32_R_INFO (indx, dr_type); 3045 loc = htab->elf.srelgot->contents; 3046 loc += htab->elf.srelgot->reloc_count++ 3047 * sizeof (Elf32_External_Rela); 3048 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 3049 3050 if (r_type == R_390_TLS_GD32) 3051 { 3052 if (indx == 0) 3053 { 3054 BFD_ASSERT (! unresolved_reloc); 3055 bfd_put_32 (output_bfd, 3056 relocation - dtpoff_base (info), 3057 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); 3058 } 3059 else 3060 { 3061 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF); 3062 outrel.r_offset += GOT_ENTRY_SIZE; 3063 outrel.r_addend = 0; 3064 htab->elf.srelgot->reloc_count++; 3065 loc += sizeof (Elf32_External_Rela); 3066 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 3067 } 3068 } 3069 3070 if (h != NULL) 3071 h->got.offset |= 1; 3072 else 3073 local_got_offsets[r_symndx] |= 1; 3074 } 3075 3076 if (off >= (bfd_vma) -2) 3077 abort (); 3078 if (r_type == ELF32_R_TYPE (rel->r_info)) 3079 { 3080 relocation = htab->elf.sgot->output_offset + off; 3081 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT) 3082 relocation += htab->elf.sgot->output_section->vma; 3083 unresolved_reloc = FALSE; 3084 } 3085 else 3086 { 3087 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off, 3088 contents + rel->r_offset); 3089 continue; 3090 } 3091 break; 3092 3093 case R_390_TLS_GOTIE12: 3094 case R_390_TLS_GOTIE20: 3095 case R_390_TLS_IEENT: 3096 if (h == NULL) 3097 { 3098 if (local_got_offsets == NULL) 3099 abort(); 3100 off = local_got_offsets[r_symndx]; 3101 if (bfd_link_pic (info)) 3102 goto emit_tls_relocs; 3103 } 3104 else 3105 { 3106 off = h->got.offset; 3107 tls_type = elf_s390_hash_entry(h)->tls_type; 3108 if (bfd_link_pic (info) 3109 || h->dynindx != -1 3110 || tls_type < GOT_TLS_IE) 3111 goto emit_tls_relocs; 3112 } 3113 3114 if (htab->elf.sgot == NULL) 3115 abort (); 3116 3117 BFD_ASSERT (! unresolved_reloc); 3118 bfd_put_32 (output_bfd, -tpoff (info, relocation), 3119 htab->elf.sgot->contents + off); 3120 relocation = htab->elf.sgot->output_offset + off; 3121 if (r_type == R_390_TLS_IEENT) 3122 relocation += htab->elf.sgot->output_section->vma; 3123 unresolved_reloc = FALSE; 3124 break; 3125 3126 case R_390_TLS_LDM32: 3127 if (! bfd_link_pic (info)) 3128 /* The literal pool entry this relocation refers to gets ignored 3129 by the optimized code of the local exec model. Do nothing 3130 and the value will turn out zero. */ 3131 continue; 3132 3133 if (htab->elf.sgot == NULL) 3134 abort (); 3135 3136 off = htab->tls_ldm_got.offset; 3137 if (off & 1) 3138 off &= ~1; 3139 else 3140 { 3141 Elf_Internal_Rela outrel; 3142 bfd_byte *loc; 3143 3144 if (htab->elf.srelgot == NULL) 3145 abort (); 3146 3147 outrel.r_offset = (htab->elf.sgot->output_section->vma 3148 + htab->elf.sgot->output_offset + off); 3149 3150 bfd_put_32 (output_bfd, 0, 3151 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); 3152 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD); 3153 outrel.r_addend = 0; 3154 loc = htab->elf.srelgot->contents; 3155 loc += htab->elf.srelgot->reloc_count++ 3156 * sizeof (Elf32_External_Rela); 3157 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 3158 htab->tls_ldm_got.offset |= 1; 3159 } 3160 relocation = htab->elf.sgot->output_offset + off; 3161 unresolved_reloc = FALSE; 3162 break; 3163 3164 case R_390_TLS_LE32: 3165 if (bfd_link_dll (info)) 3166 { 3167 /* Linking a shared library with non-fpic code requires 3168 a R_390_TLS_TPOFF relocation. */ 3169 Elf_Internal_Rela outrel; 3170 asection *sreloc; 3171 bfd_byte *loc; 3172 int indx; 3173 3174 outrel.r_offset = rel->r_offset 3175 + input_section->output_section->vma 3176 + input_section->output_offset; 3177 if (h != NULL && h->dynindx != -1) 3178 indx = h->dynindx; 3179 else 3180 indx = 0; 3181 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF); 3182 if (indx == 0) 3183 outrel.r_addend = relocation - dtpoff_base (info); 3184 else 3185 outrel.r_addend = 0; 3186 sreloc = elf_section_data (input_section)->sreloc; 3187 if (sreloc == NULL) 3188 abort (); 3189 loc = sreloc->contents; 3190 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 3191 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 3192 } 3193 else 3194 { 3195 BFD_ASSERT (! unresolved_reloc); 3196 bfd_put_32 (output_bfd, -tpoff (info, relocation), 3197 contents + rel->r_offset); 3198 } 3199 continue; 3200 3201 case R_390_TLS_LDO32: 3202 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING)) 3203 relocation -= dtpoff_base (info); 3204 else 3205 /* When converting LDO to LE, we must negate. */ 3206 relocation = -tpoff (info, relocation); 3207 break; 3208 3209 /* Relocations for tls instructions. */ 3210 case R_390_TLS_LOAD: 3211 case R_390_TLS_GDCALL: 3212 case R_390_TLS_LDCALL: 3213 tls_type = GOT_UNKNOWN; 3214 if (h == NULL && local_got_offsets) 3215 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 3216 else if (h != NULL) 3217 tls_type = elf_s390_hash_entry(h)->tls_type; 3218 3219 if (tls_type == GOT_TLS_GD) 3220 continue; 3221 3222 if (r_type == R_390_TLS_LOAD) 3223 { 3224 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) 3225 { 3226 /* IE->LE transition. Four valid cases: 3227 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 3228 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 3229 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 3230 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ 3231 unsigned int insn, ry; 3232 3233 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 3234 ry = 0; 3235 if ((insn & 0xff00f000) == 0x58000000) 3236 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */ 3237 ry = (insn & 0x000f0000); 3238 else if ((insn & 0xff0f0000) == 0x58000000) 3239 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */ 3240 ry = (insn & 0x0000f000) << 4; 3241 else if ((insn & 0xff00f000) == 0x5800c000) 3242 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */ 3243 ry = (insn & 0x000f0000); 3244 else if ((insn & 0xff0f0000) == 0x580c0000) 3245 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ 3246 ry = (insn & 0x0000f000) << 4; 3247 else 3248 invalid_tls_insn (input_bfd, input_section, rel); 3249 insn = 0x18000700 | (insn & 0x00f00000) | ry; 3250 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 3251 } 3252 } 3253 else if (r_type == R_390_TLS_GDCALL) 3254 { 3255 unsigned int insn; 3256 3257 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 3258 if ((insn & 0xff000fff) != 0x4d000000 && 3259 (insn & 0xffff0000) != 0xc0e50000 && 3260 (insn & 0xff000000) != 0x0d000000) 3261 invalid_tls_insn (input_bfd, input_section, rel); 3262 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) 3263 { 3264 if ((insn & 0xff000000) == 0x0d000000) 3265 { 3266 /* GD->LE transition. 3267 basr rx, ry -> nopr r7 */ 3268 insn = 0x07070000 | (insn & 0xffff); 3269 } 3270 else if ((insn & 0xff000000) == 0x4d000000) 3271 { 3272 /* GD->LE transition. 3273 bas %r14,0(%rx,%r13) -> bc 0,0 */ 3274 insn = 0x47000000; 3275 } 3276 else 3277 { 3278 /* GD->LE transition. 3279 brasl %r14,_tls_get_offset@plt -> brcl 0,. */ 3280 insn = 0xc0040000; 3281 bfd_put_16 (output_bfd, 0x0000, 3282 contents + rel->r_offset + 4); 3283 } 3284 } 3285 else 3286 { 3287 /* If basr is used in the pic case to invoke 3288 _tls_get_offset, something went wrong before. */ 3289 if ((insn & 0xff000000) == 0x0d000000) 3290 invalid_tls_insn (input_bfd, input_section, rel); 3291 3292 if ((insn & 0xff000000) == 0x4d000000) 3293 { 3294 /* GD->IE transition. 3295 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */ 3296 insn = 0x5822c000; 3297 } 3298 else 3299 { 3300 /* GD->IE transition. 3301 brasl %r14,__tls_get_addr@plt -> 3302 l %r2,0(%r2,%r12) ; bcr 0,0 */ 3303 insn = 0x5822c000; 3304 bfd_put_16 (output_bfd, 0x0700, 3305 contents + rel->r_offset + 4); 3306 } 3307 } 3308 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 3309 } 3310 else if (r_type == R_390_TLS_LDCALL) 3311 { 3312 if (!bfd_link_pic (info)) 3313 { 3314 unsigned int insn; 3315 3316 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 3317 if ((insn & 0xff000fff) != 0x4d000000 && 3318 (insn & 0xffff0000) != 0xc0e50000 && 3319 (insn & 0xff000000) != 0x0d000000) 3320 invalid_tls_insn (input_bfd, input_section, rel); 3321 3322 if ((insn & 0xff000000) == 0x0d000000) 3323 { 3324 /* LD->LE transition. 3325 basr rx, ry -> nopr r7 */ 3326 insn = 0x07070000 | (insn & 0xffff); 3327 } 3328 else if ((insn & 0xff000000) == 0x4d000000) 3329 { 3330 /* LD->LE transition. 3331 bas %r14,0(%rx,%r13) -> bc 0,0 */ 3332 insn = 0x47000000; 3333 } 3334 else 3335 { 3336 /* LD->LE transition. 3337 brasl %r14,__tls_get_offset@plt -> brcl 0,. */ 3338 insn = 0xc0040000; 3339 bfd_put_16 (output_bfd, 0x0000, 3340 contents + rel->r_offset + 4); 3341 } 3342 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 3343 } 3344 } 3345 continue; 3346 3347 default: 3348 break; 3349 } 3350 3351 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections 3352 because such sections are not SEC_ALLOC and thus ld.so will 3353 not process them. */ 3354 if (unresolved_reloc 3355 && !((input_section->flags & SEC_DEBUGGING) != 0 3356 && h->def_dynamic) 3357 && _bfd_elf_section_offset (output_bfd, info, input_section, 3358 rel->r_offset) != (bfd_vma) -1) 3359 _bfd_error_handler 3360 /* xgettext:c-format */ 3361 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), 3362 input_bfd, 3363 input_section, 3364 (long) rel->r_offset, 3365 howto->name, 3366 h->root.root.string); 3367 3368 do_relocation: 3369 3370 /* When applying a 24 bit reloc we need to start one byte 3371 earlier. Otherwise the 32 bit get/put bfd operations might 3372 access a byte after the actual section. */ 3373 if (r_type == R_390_PC24DBL 3374 || r_type == R_390_PLT24DBL) 3375 rel->r_offset--; 3376 3377 if (r_type == R_390_20 3378 || r_type == R_390_GOT20 3379 || r_type == R_390_GOTPLT20 3380 || r_type == R_390_TLS_GOTIE20) 3381 { 3382 relocation += rel->r_addend; 3383 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; 3384 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3385 contents, rel->r_offset, 3386 relocation, 0); 3387 } 3388 else 3389 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3390 contents, rel->r_offset, 3391 relocation, rel->r_addend); 3392 3393 if (r != bfd_reloc_ok) 3394 { 3395 const char *name; 3396 3397 if (h != NULL) 3398 name = h->root.root.string; 3399 else 3400 { 3401 name = bfd_elf_string_from_elf_section (input_bfd, 3402 symtab_hdr->sh_link, 3403 sym->st_name); 3404 if (name == NULL) 3405 return FALSE; 3406 if (*name == '\0') 3407 name = bfd_section_name (input_bfd, sec); 3408 } 3409 3410 if (r == bfd_reloc_overflow) 3411 (*info->callbacks->reloc_overflow) 3412 (info, (h ? &h->root : NULL), name, howto->name, 3413 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 3414 else 3415 { 3416 _bfd_error_handler 3417 /* xgettext:c-format */ 3418 (_("%B(%A+0x%lx): reloc against `%s': error %d"), 3419 input_bfd, input_section, 3420 (long) rel->r_offset, name, (int) r); 3421 return FALSE; 3422 } 3423 } 3424 } 3425 3426 return TRUE; 3427} 3428 3429/* Generate the PLT slots together with the dynamic relocations needed 3430 for IFUNC symbols. */ 3431 3432static void 3433elf_s390_finish_ifunc_symbol (bfd *output_bfd, 3434 struct bfd_link_info *info, 3435 struct elf_link_hash_entry *h, 3436 struct elf_s390_link_hash_table *htab, 3437 bfd_vma iplt_offset, 3438 bfd_vma resolver_address) 3439{ 3440 bfd_vma iplt_index; 3441 bfd_vma got_offset; 3442 bfd_vma igotiplt_offset; 3443 Elf_Internal_Rela rela; 3444 bfd_byte *loc; 3445 asection *plt, *gotplt, *relplt; 3446 bfd_vma relative_offset; 3447 3448 if (htab->elf.iplt == NULL 3449 || htab->elf.igotplt == NULL 3450 || htab->elf.irelplt == NULL) 3451 abort (); 3452 3453 gotplt = htab->elf.igotplt; 3454 relplt = htab->elf.irelplt; 3455 3456 /* Index of the PLT slot within iplt section. */ 3457 iplt_index = iplt_offset / PLT_ENTRY_SIZE; 3458 plt = htab->elf.iplt; 3459 /* Offset into the igot.plt section. */ 3460 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE; 3461 /* Offset into the got section. */ 3462 got_offset = igotiplt_offset + gotplt->output_offset; 3463 3464 /* S390 uses halfwords for relative branch calc! */ 3465 relative_offset = - (plt->output_offset + 3466 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2; 3467 /* If offset is > 32768, branch to a previous branch 3468 390 can only handle +-64 K jumps. */ 3469 if ( -32768 > (int) relative_offset ) 3470 relative_offset 3471 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2); 3472 3473 /* Fill in the entry in the procedure linkage table. */ 3474 if (!bfd_link_pic (info)) 3475 { 3476 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry, 3477 PLT_ENTRY_SIZE); 3478 3479 /* Adjust jump to the first plt entry. */ 3480 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3481 plt->contents + iplt_offset + 20); 3482 3483 /* Push the GOT offset field. */ 3484 bfd_put_32 (output_bfd, 3485 (gotplt->output_section->vma 3486 + got_offset), 3487 plt->contents + iplt_offset + 24); 3488 } 3489 else if (got_offset < 4096) 3490 { 3491 /* The GOT offset is small enough to be used directly as 3492 displacement. */ 3493 memcpy (plt->contents + iplt_offset, 3494 elf_s390_plt_pic12_entry, 3495 PLT_ENTRY_SIZE); 3496 3497 /* Put in the GOT offset as displacement value. The 0xc000 3498 value comes from the first word of the plt entry. Look 3499 at the elf_s390_plt_pic16_entry content. */ 3500 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset, 3501 plt->contents + iplt_offset + 2); 3502 3503 /* Adjust the jump to the first plt entry. */ 3504 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3505 plt->contents + iplt_offset + 20); 3506 } 3507 else if (got_offset < 32768) 3508 { 3509 /* The GOT offset is too big for a displacement but small 3510 enough to be a signed 16 bit immediate value as it can be 3511 used in an lhi instruction. */ 3512 memcpy (plt->contents + iplt_offset, 3513 elf_s390_plt_pic16_entry, 3514 PLT_ENTRY_SIZE); 3515 3516 /* Put in the GOT offset for the lhi instruction. */ 3517 bfd_put_16 (output_bfd, (bfd_vma)got_offset, 3518 plt->contents + iplt_offset + 2); 3519 3520 /* Adjust the jump to the first plt entry. */ 3521 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3522 plt->contents + iplt_offset + 20); 3523 } 3524 else 3525 { 3526 memcpy (plt->contents + iplt_offset, 3527 elf_s390_plt_pic_entry, 3528 PLT_ENTRY_SIZE); 3529 3530 /* Adjust the jump to the first plt entry. */ 3531 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3532 plt->contents + iplt_offset + 20); 3533 3534 /* Push the GOT offset field. */ 3535 bfd_put_32 (output_bfd, got_offset, 3536 plt->contents + iplt_offset + 24); 3537 } 3538 /* Insert offset into reloc. table here. */ 3539 bfd_put_32 (output_bfd, relplt->output_offset + 3540 iplt_index * RELA_ENTRY_SIZE, 3541 plt->contents + iplt_offset + 28); 3542 3543 /* Fill in the entry in the global offset table. 3544 Points to instruction after GOT offset. */ 3545 bfd_put_32 (output_bfd, 3546 (plt->output_section->vma 3547 + plt->output_offset 3548 + iplt_offset 3549 + 12), 3550 gotplt->contents + igotiplt_offset); 3551 3552 /* Fill in the entry in the .rela.plt section. */ 3553 rela.r_offset = gotplt->output_section->vma + got_offset; 3554 3555 if (!h 3556 || h->dynindx == -1 3557 || ((bfd_link_executable (info) 3558 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 3559 && h->def_regular)) 3560 { 3561 /* The symbol can be locally resolved. */ 3562 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE); 3563 rela.r_addend = resolver_address; 3564 } 3565 else 3566 { 3567 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT); 3568 rela.r_addend = 0; 3569 } 3570 3571 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE; 3572 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3573} 3574 3575/* Finish up dynamic symbol handling. We set the contents of various 3576 dynamic sections here. */ 3577 3578static bfd_boolean 3579elf_s390_finish_dynamic_symbol (bfd *output_bfd, 3580 struct bfd_link_info *info, 3581 struct elf_link_hash_entry *h, 3582 Elf_Internal_Sym *sym) 3583{ 3584 struct elf_s390_link_hash_table *htab; 3585 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h; 3586 3587 htab = elf_s390_hash_table (info); 3588 3589 if (h->plt.offset != (bfd_vma) -1) 3590 { 3591 bfd_vma plt_index; 3592 bfd_vma got_offset; 3593 Elf_Internal_Rela rela; 3594 bfd_byte *loc; 3595 bfd_vma relative_offset; 3596 3597 /* This symbol has an entry in the procedure linkage table. Set 3598 it up. */ 3599 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 3600 { 3601 elf_s390_finish_ifunc_symbol (output_bfd, info, h, 3602 htab, h->plt.offset, 3603 eh->ifunc_resolver_address + 3604 eh->ifunc_resolver_section->output_offset + 3605 eh->ifunc_resolver_section->output_section->vma); 3606 /* Do not return yet. Handling of explicit GOT slots of 3607 IFUNC symbols is below. */ 3608 } 3609 else 3610 { 3611 if (h->dynindx == -1 3612 || htab->elf.splt == NULL 3613 || htab->elf.sgotplt == NULL 3614 || htab->elf.srelplt == NULL) 3615 abort (); 3616 3617 /* Calc. index no. 3618 Current offset - size first entry / entry size. */ 3619 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; 3620 3621 /* Offset in GOT is PLT index plus GOT headers(3) times 4, 3622 addr & GOT addr. */ 3623 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; 3624 3625 /* S390 uses halfwords for relative branch calc! */ 3626 relative_offset = - ((PLT_FIRST_ENTRY_SIZE + 3627 (PLT_ENTRY_SIZE * plt_index) + 18) / 2); 3628 /* If offset is > 32768, branch to a previous branch 3629 390 can only handle +-64 K jumps. */ 3630 if ( -32768 > (int) relative_offset ) 3631 relative_offset 3632 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2); 3633 3634 /* Fill in the entry in the procedure linkage table. */ 3635 if (!bfd_link_pic (info)) 3636 { 3637 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry, 3638 PLT_ENTRY_SIZE); 3639 3640 /* Adjust jump to the first plt entry. */ 3641 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3642 htab->elf.splt->contents + h->plt.offset + 20); 3643 3644 /* Push the GOT offset field. */ 3645 bfd_put_32 (output_bfd, 3646 (htab->elf.sgotplt->output_section->vma 3647 + htab->elf.sgotplt->output_offset 3648 + got_offset), 3649 htab->elf.splt->contents + h->plt.offset + 24); 3650 } 3651 else if (got_offset < 4096) 3652 { 3653 /* The GOT offset is small enough to be used directly as 3654 displacement. */ 3655 memcpy (htab->elf.splt->contents + h->plt.offset, 3656 elf_s390_plt_pic12_entry, 3657 PLT_ENTRY_SIZE); 3658 3659 /* Put in the GOT offset as displacement value. The 0xc000 3660 value comes from the first word of the plt entry. Look 3661 at the elf_s390_plt_pic12_entry content. */ 3662 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset, 3663 htab->elf.splt->contents + h->plt.offset + 2); 3664 3665 /* Adjust the jump to the first plt entry. */ 3666 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3667 htab->elf.splt->contents + h->plt.offset + 20); 3668 } 3669 else if (got_offset < 32768) 3670 { 3671 /* The GOT offset is too big for a displacement but small 3672 enough to be a signed 16 bit immediate value as it can be 3673 used in an lhi instruction. */ 3674 memcpy (htab->elf.splt->contents + h->plt.offset, 3675 elf_s390_plt_pic16_entry, 3676 PLT_ENTRY_SIZE); 3677 3678 /* Put in the GOT offset for the lhi instruction. */ 3679 bfd_put_16 (output_bfd, (bfd_vma)got_offset, 3680 htab->elf.splt->contents + h->plt.offset + 2); 3681 3682 /* Adjust the jump to the first plt entry. */ 3683 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3684 htab->elf.splt->contents + h->plt.offset + 20); 3685 } 3686 else 3687 { 3688 memcpy (htab->elf.splt->contents + h->plt.offset, 3689 elf_s390_plt_pic_entry, 3690 PLT_ENTRY_SIZE); 3691 3692 /* Adjust the jump to the first plt entry. */ 3693 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3694 htab->elf.splt->contents + h->plt.offset + 20); 3695 3696 /* Push the GOT offset field. */ 3697 bfd_put_32 (output_bfd, got_offset, 3698 htab->elf.splt->contents + h->plt.offset + 24); 3699 } 3700 /* Insert offset into reloc. table here. */ 3701 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), 3702 htab->elf.splt->contents + h->plt.offset + 28); 3703 3704 /* Fill in the entry in the global offset table. 3705 Points to instruction after GOT offset. */ 3706 bfd_put_32 (output_bfd, 3707 (htab->elf.splt->output_section->vma 3708 + htab->elf.splt->output_offset 3709 + h->plt.offset 3710 + 12), 3711 htab->elf.sgotplt->contents + got_offset); 3712 3713 /* Fill in the entry in the .rela.plt section. */ 3714 rela.r_offset = (htab->elf.sgotplt->output_section->vma 3715 + htab->elf.sgotplt->output_offset 3716 + got_offset); 3717 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT); 3718 rela.r_addend = 0; 3719 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela); 3720 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3721 3722 if (!h->def_regular) 3723 { 3724 /* Mark the symbol as undefined, rather than as defined in 3725 the .plt section. Leave the value alone. This is a clue 3726 for the dynamic linker, to make function pointer 3727 comparisons work between an application and shared 3728 library. */ 3729 sym->st_shndx = SHN_UNDEF; 3730 } 3731 } 3732 } 3733 3734 if (h->got.offset != (bfd_vma) -1 3735 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD 3736 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE 3737 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) 3738 { 3739 Elf_Internal_Rela rela; 3740 bfd_byte *loc; 3741 3742 /* This symbol has an entry in the global offset table. Set it 3743 up. */ 3744 3745 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) 3746 abort (); 3747 3748 rela.r_offset = (htab->elf.sgot->output_section->vma 3749 + htab->elf.sgot->output_offset 3750 + (h->got.offset &~ (bfd_vma) 1)); 3751 3752 /* If this is a static link, or it is a -Bsymbolic link and the 3753 symbol is defined locally or was forced to be local because 3754 of a version file, we just want to emit a RELATIVE reloc. 3755 The entry in the global offset table will already have been 3756 initialized in the relocate_section function. */ 3757 if (h->def_regular && s390_is_ifunc_symbol_p (h)) 3758 { 3759 if (bfd_link_pic (info)) 3760 { 3761 /* An explicit GOT slot usage needs GLOB_DAT. If the 3762 symbol references local the implicit got.iplt slot 3763 will be used and the IRELATIVE reloc has been created 3764 above. */ 3765 goto do_glob_dat; 3766 } 3767 else 3768 { 3769 /* For non-shared objects explicit GOT slots must be 3770 filled with the PLT slot address for pointer 3771 equality reasons. */ 3772 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma 3773 + htab->elf.iplt->output_offset 3774 + h->plt.offset), 3775 htab->elf.sgot->contents + h->got.offset); 3776 return TRUE; 3777 } 3778 } 3779 else if (bfd_link_pic (info) 3780 && SYMBOL_REFERENCES_LOCAL (info, h)) 3781 { 3782 /* If this is a static link, or it is a -Bsymbolic link and 3783 the symbol is defined locally or was forced to be local 3784 because of a version file, we just want to emit a 3785 RELATIVE reloc. The entry in the global offset table 3786 will already have been initialized in the 3787 relocate_section function. */ 3788 if (!(h->def_regular || ELF_COMMON_DEF_P (h))) 3789 return FALSE; 3790 BFD_ASSERT((h->got.offset & 1) != 0); 3791 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 3792 rela.r_addend = (h->root.u.def.value 3793 + h->root.u.def.section->output_section->vma 3794 + h->root.u.def.section->output_offset); 3795 } 3796 else 3797 { 3798 BFD_ASSERT((h->got.offset & 1) == 0); 3799 do_glob_dat: 3800 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset); 3801 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT); 3802 rela.r_addend = 0; 3803 } 3804 3805 loc = htab->elf.srelgot->contents; 3806 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 3807 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3808 } 3809 3810 if (h->needs_copy) 3811 { 3812 Elf_Internal_Rela rela; 3813 asection *s; 3814 bfd_byte *loc; 3815 3816 /* This symbols needs a copy reloc. Set it up. */ 3817 3818 if (h->dynindx == -1 3819 || (h->root.type != bfd_link_hash_defined 3820 && h->root.type != bfd_link_hash_defweak) 3821 || htab->elf.srelbss == NULL 3822 || htab->elf.sreldynrelro == NULL) 3823 abort (); 3824 3825 rela.r_offset = (h->root.u.def.value 3826 + h->root.u.def.section->output_section->vma 3827 + h->root.u.def.section->output_offset); 3828 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY); 3829 rela.r_addend = 0; 3830 if (h->root.u.def.section == htab->elf.sdynrelro) 3831 s = htab->elf.sreldynrelro; 3832 else 3833 s = htab->elf.srelbss; 3834 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 3835 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3836 } 3837 3838 /* Mark some specially defined symbols as absolute. */ 3839 if (h == htab->elf.hdynamic 3840 || h == htab->elf.hgot 3841 || h == htab->elf.hplt) 3842 sym->st_shndx = SHN_ABS; 3843 3844 return TRUE; 3845} 3846 3847/* Used to decide how to sort relocs in an optimal manner for the 3848 dynamic linker, before writing them out. */ 3849 3850static enum elf_reloc_type_class 3851elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 3852 const asection *rel_sec ATTRIBUTE_UNUSED, 3853 const Elf_Internal_Rela *rela) 3854{ 3855 bfd *abfd = info->output_bfd; 3856 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 3857 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info); 3858 unsigned long r_symndx = ELF32_R_SYM (rela->r_info); 3859 Elf_Internal_Sym sym; 3860 3861 if (htab->elf.dynsym == NULL 3862 || !bed->s->swap_symbol_in (abfd, 3863 (htab->elf.dynsym->contents 3864 + r_symndx * bed->s->sizeof_sym), 3865 0, &sym)) 3866 abort (); 3867 3868 /* Check relocation against STT_GNU_IFUNC symbol. */ 3869 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) 3870 return reloc_class_ifunc; 3871 3872 switch ((int) ELF32_R_TYPE (rela->r_info)) 3873 { 3874 case R_390_RELATIVE: 3875 return reloc_class_relative; 3876 case R_390_JMP_SLOT: 3877 return reloc_class_plt; 3878 case R_390_COPY: 3879 return reloc_class_copy; 3880 default: 3881 return reloc_class_normal; 3882 } 3883} 3884 3885/* Finish up the dynamic sections. */ 3886 3887static bfd_boolean 3888elf_s390_finish_dynamic_sections (bfd *output_bfd, 3889 struct bfd_link_info *info) 3890{ 3891 struct elf_s390_link_hash_table *htab; 3892 bfd *dynobj; 3893 asection *sdyn; 3894 bfd *ibfd; 3895 unsigned int i; 3896 3897 htab = elf_s390_hash_table (info); 3898 dynobj = htab->elf.dynobj; 3899 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 3900 3901 if (htab->elf.dynamic_sections_created) 3902 { 3903 Elf32_External_Dyn *dyncon, *dynconend; 3904 3905 if (sdyn == NULL || htab->elf.sgot == NULL) 3906 abort (); 3907 3908 dyncon = (Elf32_External_Dyn *) sdyn->contents; 3909 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 3910 for (; dyncon < dynconend; dyncon++) 3911 { 3912 Elf_Internal_Dyn dyn; 3913 asection *s; 3914 3915 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 3916 3917 switch (dyn.d_tag) 3918 { 3919 default: 3920 continue; 3921 3922 case DT_PLTGOT: 3923 s = htab->elf.sgotplt; 3924 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 3925 break; 3926 3927 case DT_JMPREL: 3928 s = htab->elf.srelplt; 3929 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 3930 break; 3931 3932 case DT_PLTRELSZ: 3933 dyn.d_un.d_val = htab->elf.srelplt->size + htab->elf.irelplt->size; 3934 break; 3935 } 3936 3937 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3938 } 3939 3940 /* Fill in the special first entry in the procedure linkage table. */ 3941 if (htab->elf.splt && htab->elf.splt->size > 0) 3942 { 3943 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE); 3944 if (bfd_link_pic (info)) 3945 { 3946 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry, 3947 PLT_FIRST_ENTRY_SIZE); 3948 } 3949 else 3950 { 3951 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry, 3952 PLT_FIRST_ENTRY_SIZE); 3953 bfd_put_32 (output_bfd, 3954 htab->elf.sgotplt->output_section->vma 3955 + htab->elf.sgotplt->output_offset, 3956 htab->elf.splt->contents + 24); 3957 } 3958 elf_section_data (htab->elf.splt->output_section) 3959 ->this_hdr.sh_entsize = 4; 3960 } 3961 3962 } 3963 3964 if (htab->elf.sgotplt) 3965 { 3966 /* Fill in the first three entries in the global offset table. */ 3967 if (htab->elf.sgotplt->size > 0) 3968 { 3969 bfd_put_32 (output_bfd, 3970 (sdyn == NULL ? (bfd_vma) 0 3971 : sdyn->output_section->vma + sdyn->output_offset), 3972 htab->elf.sgotplt->contents); 3973 /* One entry for shared object struct ptr. */ 3974 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4); 3975 /* One entry for _dl_runtime_resolve. */ 3976 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8); 3977 } 3978 3979 elf_section_data (htab->elf.sgotplt->output_section) 3980 ->this_hdr.sh_entsize = 4; 3981 } 3982 /* Finish dynamic symbol for local IFUNC symbols. */ 3983 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 3984 { 3985 struct plt_entry *local_plt; 3986 Elf_Internal_Sym *isym; 3987 Elf_Internal_Shdr *symtab_hdr; 3988 3989 symtab_hdr = &elf_symtab_hdr (ibfd); 3990 3991 local_plt = elf_s390_local_plt (ibfd); 3992 if (local_plt != NULL) 3993 for (i = 0; i < symtab_hdr->sh_info; i++) 3994 { 3995 if (local_plt[i].plt.offset != (bfd_vma) -1) 3996 { 3997 asection *sec = local_plt[i].sec; 3998 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i); 3999 if (isym == NULL) 4000 return FALSE; 4001 4002 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 4003 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab, 4004 local_plt[i].plt.offset, 4005 isym->st_value 4006 + sec->output_section->vma 4007 + sec->output_offset); 4008 4009 } 4010 } 4011 } 4012 return TRUE; 4013} 4014 4015/* Support for core dump NOTE sections. */ 4016 4017static bfd_boolean 4018elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note) 4019{ 4020 int offset; 4021 unsigned int size; 4022 4023 switch (note->descsz) 4024 { 4025 default: 4026 return FALSE; 4027 4028 case 224: /* S/390 Linux. */ 4029 /* pr_cursig */ 4030 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 4031 4032 /* pr_pid */ 4033 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); 4034 4035 /* pr_reg */ 4036 offset = 72; 4037 size = 144; 4038 break; 4039 } 4040 4041 /* Make a ".reg/999" section. */ 4042 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 4043 size, note->descpos + offset); 4044} 4045 4046static bfd_boolean 4047elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 4048{ 4049 switch (note->descsz) 4050 { 4051 default: 4052 return FALSE; 4053 4054 case 124: /* sizeof(struct elf_prpsinfo) on s390 */ 4055 elf_tdata (abfd)->core->pid 4056 = bfd_get_32 (abfd, note->descdata + 12); 4057 elf_tdata (abfd)->core->program 4058 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); 4059 elf_tdata (abfd)->core->command 4060 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); 4061 break; 4062 } 4063 4064 /* Note that for some reason, a spurious space is tacked 4065 onto the end of the args in some (at least one anyway) 4066 implementations, so strip it off if it exists. */ 4067 4068 { 4069 char *command = elf_tdata (abfd)->core->command; 4070 int n = strlen (command); 4071 4072 if (0 < n && command[n - 1] == ' ') 4073 command[n - 1] = '\0'; 4074 } 4075 4076 return TRUE; 4077} 4078 4079static char * 4080elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz, 4081 int note_type, ...) 4082{ 4083 va_list ap; 4084 4085 switch (note_type) 4086 { 4087 default: 4088 return NULL; 4089 4090 case NT_PRPSINFO: 4091 { 4092 char data[124] = { 0 }; 4093 const char *fname, *psargs; 4094 4095 va_start (ap, note_type); 4096 fname = va_arg (ap, const char *); 4097 psargs = va_arg (ap, const char *); 4098 va_end (ap); 4099 4100 strncpy (data + 28, fname, 16); 4101 strncpy (data + 44, psargs, 80); 4102 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, 4103 &data, sizeof (data)); 4104 } 4105 4106 case NT_PRSTATUS: 4107 { 4108 char data[224] = { 0 }; 4109 long pid; 4110 int cursig; 4111 const void *gregs; 4112 4113 va_start (ap, note_type); 4114 pid = va_arg (ap, long); 4115 cursig = va_arg (ap, int); 4116 gregs = va_arg (ap, const void *); 4117 va_end (ap); 4118 4119 bfd_put_16 (abfd, cursig, data + 12); 4120 bfd_put_32 (abfd, pid, data + 24); 4121 memcpy (data + 72, gregs, 144); 4122 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, 4123 &data, sizeof (data)); 4124 } 4125 } 4126 /* NOTREACHED */ 4127} 4128 4129/* Return address for Ith PLT stub in section PLT, for relocation REL 4130 or (bfd_vma) -1 if it should not be included. */ 4131 4132static bfd_vma 4133elf_s390_plt_sym_val (bfd_vma i, const asection *plt, 4134 const arelent *rel ATTRIBUTE_UNUSED) 4135{ 4136 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; 4137} 4138 4139/* Merge backend specific data from an object file to the output 4140 object file when linking. */ 4141 4142static bfd_boolean 4143elf32_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 4144{ 4145 bfd *obfd = info->output_bfd; 4146 4147 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd)) 4148 return TRUE; 4149 4150 if (!elf_s390_merge_obj_attributes (ibfd, info)) 4151 return FALSE; 4152 4153 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags; 4154 return TRUE; 4155} 4156 4157 4158#define TARGET_BIG_SYM s390_elf32_vec 4159#define TARGET_BIG_NAME "elf32-s390" 4160#define ELF_ARCH bfd_arch_s390 4161#define ELF_TARGET_ID S390_ELF_DATA 4162#define ELF_MACHINE_CODE EM_S390 4163#define ELF_MACHINE_ALT1 EM_S390_OLD 4164#define ELF_MAXPAGESIZE 0x1000 4165 4166#define elf_backend_can_gc_sections 1 4167#define elf_backend_can_refcount 1 4168#define elf_backend_want_got_plt 1 4169#define elf_backend_plt_readonly 1 4170#define elf_backend_want_plt_sym 0 4171#define elf_backend_got_header_size 12 4172#define elf_backend_want_dynrelro 1 4173#define elf_backend_rela_normal 1 4174 4175#define elf_info_to_howto elf_s390_info_to_howto 4176 4177#define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name 4178#define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create 4179#define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup 4180#define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup 4181 4182#define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data 4183 4184#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol 4185#define elf_backend_check_relocs elf_s390_check_relocs 4186#define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol 4187#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections 4188#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections 4189#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol 4190#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook 4191#define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook 4192#define elf_backend_reloc_type_class elf_s390_reloc_type_class 4193#define elf_backend_relocate_section elf_s390_relocate_section 4194#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections 4195#define elf_backend_init_index_section _bfd_elf_init_1_index_section 4196#define elf_backend_grok_prstatus elf_s390_grok_prstatus 4197#define elf_backend_grok_psinfo elf_s390_grok_psinfo 4198#define elf_backend_write_core_note elf_s390_write_core_note 4199#define elf_backend_plt_sym_val elf_s390_plt_sym_val 4200#define elf_backend_add_symbol_hook elf_s390_add_symbol_hook 4201#define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p 4202 4203#define bfd_elf32_mkobject elf_s390_mkobject 4204#define elf_backend_object_p elf_s390_object_p 4205 4206#include "elf32-target.h" 4207