elf32-s390.c revision 130562
1/* IBM S/390-specific support for 32-bit ELF 2 Copyright 2000, 2001, 2002, 2003, 2004 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 2 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., 59 Temple Place - Suite 330, Boston, MA 20 02111-1307, USA. */ 21 22#include "bfd.h" 23#include "sysdep.h" 24#include "bfdlink.h" 25#include "libbfd.h" 26#include "elf-bfd.h" 27 28static reloc_howto_type *elf_s390_reloc_type_lookup 29 PARAMS ((bfd *, bfd_reloc_code_real_type)); 30static void elf_s390_info_to_howto 31 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); 32static bfd_boolean elf_s390_is_local_label_name 33 PARAMS ((bfd *, const char *)); 34static struct bfd_hash_entry *link_hash_newfunc 35 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); 36static struct bfd_link_hash_table *elf_s390_link_hash_table_create 37 PARAMS ((bfd *)); 38static bfd_boolean create_got_section 39 PARAMS((bfd *, struct bfd_link_info *)); 40static bfd_boolean elf_s390_create_dynamic_sections 41 PARAMS((bfd *, struct bfd_link_info *)); 42static void elf_s390_copy_indirect_symbol 43 PARAMS ((const struct elf_backend_data *, struct elf_link_hash_entry *, 44 struct elf_link_hash_entry *)); 45static bfd_boolean elf_s390_check_relocs 46 PARAMS ((bfd *, struct bfd_link_info *, asection *, 47 const Elf_Internal_Rela *)); 48static asection *elf_s390_gc_mark_hook 49 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, 50 struct elf_link_hash_entry *, Elf_Internal_Sym *)); 51static bfd_boolean elf_s390_gc_sweep_hook 52 PARAMS ((bfd *, struct bfd_link_info *, asection *, 53 const Elf_Internal_Rela *)); 54struct elf_s390_link_hash_entry; 55static void elf_s390_adjust_gotplt 56 PARAMS ((struct elf_s390_link_hash_entry *)); 57static bfd_boolean elf_s390_adjust_dynamic_symbol 58 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); 59static bfd_boolean allocate_dynrelocs 60 PARAMS ((struct elf_link_hash_entry *, PTR)); 61static bfd_boolean readonly_dynrelocs 62 PARAMS ((struct elf_link_hash_entry *, PTR)); 63static bfd_boolean elf_s390_size_dynamic_sections 64 PARAMS ((bfd *, struct bfd_link_info *)); 65static bfd_boolean elf_s390_relocate_section 66 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, 67 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); 68static bfd_boolean elf_s390_finish_dynamic_symbol 69 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, 70 Elf_Internal_Sym *)); 71static enum elf_reloc_type_class elf_s390_reloc_type_class 72 PARAMS ((const Elf_Internal_Rela *)); 73static bfd_boolean elf_s390_finish_dynamic_sections 74 PARAMS ((bfd *, struct bfd_link_info *)); 75static bfd_boolean elf_s390_mkobject 76 PARAMS ((bfd *)); 77static bfd_boolean elf_s390_object_p 78 PARAMS ((bfd *)); 79static bfd_boolean elf_s390_grok_prstatus 80 PARAMS ((bfd *, Elf_Internal_Note *)); 81static int elf_s390_tls_transition 82 PARAMS ((struct bfd_link_info *, int, int)); 83static bfd_reloc_status_type s390_tls_reloc 84 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); 85static bfd_vma dtpoff_base 86 PARAMS ((struct bfd_link_info *)); 87static bfd_vma tpoff 88 PARAMS ((struct bfd_link_info *, bfd_vma)); 89static void invalid_tls_insn 90 PARAMS ((bfd *, asection *, Elf_Internal_Rela *)); 91static bfd_reloc_status_type s390_elf_ldisp_reloc 92 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); 93 94#include "elf/s390.h" 95 96/* The relocation "howto" table. */ 97 98static reloc_howto_type elf_howto_table[] = 99{ 100 HOWTO (R_390_NONE, /* type */ 101 0, /* rightshift */ 102 0, /* size (0 = byte, 1 = short, 2 = long) */ 103 0, /* bitsize */ 104 FALSE, /* pc_relative */ 105 0, /* bitpos */ 106 complain_overflow_dont, /* complain_on_overflow */ 107 bfd_elf_generic_reloc, /* special_function */ 108 "R_390_NONE", /* name */ 109 FALSE, /* partial_inplace */ 110 0, /* src_mask */ 111 0, /* dst_mask */ 112 FALSE), /* pcrel_offset */ 113 114 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 115 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), 116 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 117 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), 118 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 119 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), 120 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 121 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), 122 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 123 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), 124 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield, 125 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), 126 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 127 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), 128 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 129 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), 130 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 131 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE), 132 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 133 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE), 134 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 135 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE), 136 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 137 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE), 138 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 139 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE), 140 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 141 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE), 142 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 143 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), 144 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, 145 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), 146 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, 147 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), 148 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, 149 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), 150 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 151 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), 152 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 153 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), 154 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 155 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE), 156 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */ 157 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */ 158 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */ 159 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */ 160 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 161 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE), 162 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 163 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), 164 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */ 165 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 166 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), 167 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 168 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), 169 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 170 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), 171 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */ 172 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 173 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE), 174 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 175 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), 176 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 177 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), 178 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */ 179 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, 180 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), 181 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, 182 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), 183 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, 184 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), 185 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 186 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE), 187 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */ 188 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 189 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), 190 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 191 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE), 192 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */ 193 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 194 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE), 195 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */ 196 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 197 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE), 198 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */ 199 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 200 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE), 201 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 202 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE), 203 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */ 204 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 205 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE), 206 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */ 207 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 208 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE), 209 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 210 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE), 211 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 212 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE), 213 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 214 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE), 215 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 216 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE), 217 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 218 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE), 219 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 220 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE), 221}; 222 223/* GNU extension to record C++ vtable hierarchy. */ 224static reloc_howto_type elf32_s390_vtinherit_howto = 225 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); 226static reloc_howto_type elf32_s390_vtentry_howto = 227 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); 228 229static reloc_howto_type * 230elf_s390_reloc_type_lookup (abfd, code) 231 bfd *abfd ATTRIBUTE_UNUSED; 232 bfd_reloc_code_real_type code; 233{ 234 switch (code) 235 { 236 case BFD_RELOC_NONE: 237 return &elf_howto_table[(int) R_390_NONE]; 238 case BFD_RELOC_8: 239 return &elf_howto_table[(int) R_390_8]; 240 case BFD_RELOC_390_12: 241 return &elf_howto_table[(int) R_390_12]; 242 case BFD_RELOC_16: 243 return &elf_howto_table[(int) R_390_16]; 244 case BFD_RELOC_32: 245 return &elf_howto_table[(int) R_390_32]; 246 case BFD_RELOC_CTOR: 247 return &elf_howto_table[(int) R_390_32]; 248 case BFD_RELOC_32_PCREL: 249 return &elf_howto_table[(int) R_390_PC32]; 250 case BFD_RELOC_390_GOT12: 251 return &elf_howto_table[(int) R_390_GOT12]; 252 case BFD_RELOC_32_GOT_PCREL: 253 return &elf_howto_table[(int) R_390_GOT32]; 254 case BFD_RELOC_390_PLT32: 255 return &elf_howto_table[(int) R_390_PLT32]; 256 case BFD_RELOC_390_COPY: 257 return &elf_howto_table[(int) R_390_COPY]; 258 case BFD_RELOC_390_GLOB_DAT: 259 return &elf_howto_table[(int) R_390_GLOB_DAT]; 260 case BFD_RELOC_390_JMP_SLOT: 261 return &elf_howto_table[(int) R_390_JMP_SLOT]; 262 case BFD_RELOC_390_RELATIVE: 263 return &elf_howto_table[(int) R_390_RELATIVE]; 264 case BFD_RELOC_32_GOTOFF: 265 return &elf_howto_table[(int) R_390_GOTOFF32]; 266 case BFD_RELOC_390_GOTPC: 267 return &elf_howto_table[(int) R_390_GOTPC]; 268 case BFD_RELOC_390_GOT16: 269 return &elf_howto_table[(int) R_390_GOT16]; 270 case BFD_RELOC_16_PCREL: 271 return &elf_howto_table[(int) R_390_PC16]; 272 case BFD_RELOC_390_PC16DBL: 273 return &elf_howto_table[(int) R_390_PC16DBL]; 274 case BFD_RELOC_390_PLT16DBL: 275 return &elf_howto_table[(int) R_390_PLT16DBL]; 276 case BFD_RELOC_390_PC32DBL: 277 return &elf_howto_table[(int) R_390_PC32DBL]; 278 case BFD_RELOC_390_PLT32DBL: 279 return &elf_howto_table[(int) R_390_PLT32DBL]; 280 case BFD_RELOC_390_GOTPCDBL: 281 return &elf_howto_table[(int) R_390_GOTPCDBL]; 282 case BFD_RELOC_390_GOTENT: 283 return &elf_howto_table[(int) R_390_GOTENT]; 284 case BFD_RELOC_16_GOTOFF: 285 return &elf_howto_table[(int) R_390_GOTOFF16]; 286 case BFD_RELOC_390_GOTPLT12: 287 return &elf_howto_table[(int) R_390_GOTPLT12]; 288 case BFD_RELOC_390_GOTPLT16: 289 return &elf_howto_table[(int) R_390_GOTPLT16]; 290 case BFD_RELOC_390_GOTPLT32: 291 return &elf_howto_table[(int) R_390_GOTPLT32]; 292 case BFD_RELOC_390_GOTPLTENT: 293 return &elf_howto_table[(int) R_390_GOTPLTENT]; 294 case BFD_RELOC_390_PLTOFF16: 295 return &elf_howto_table[(int) R_390_PLTOFF16]; 296 case BFD_RELOC_390_PLTOFF32: 297 return &elf_howto_table[(int) R_390_PLTOFF32]; 298 case BFD_RELOC_390_TLS_LOAD: 299 return &elf_howto_table[(int) R_390_TLS_LOAD]; 300 case BFD_RELOC_390_TLS_GDCALL: 301 return &elf_howto_table[(int) R_390_TLS_GDCALL]; 302 case BFD_RELOC_390_TLS_LDCALL: 303 return &elf_howto_table[(int) R_390_TLS_LDCALL]; 304 case BFD_RELOC_390_TLS_GD32: 305 return &elf_howto_table[(int) R_390_TLS_GD32]; 306 case BFD_RELOC_390_TLS_GOTIE12: 307 return &elf_howto_table[(int) R_390_TLS_GOTIE12]; 308 case BFD_RELOC_390_TLS_GOTIE32: 309 return &elf_howto_table[(int) R_390_TLS_GOTIE32]; 310 case BFD_RELOC_390_TLS_LDM32: 311 return &elf_howto_table[(int) R_390_TLS_LDM32]; 312 case BFD_RELOC_390_TLS_IE32: 313 return &elf_howto_table[(int) R_390_TLS_IE32]; 314 case BFD_RELOC_390_TLS_IEENT: 315 return &elf_howto_table[(int) R_390_TLS_IEENT]; 316 case BFD_RELOC_390_TLS_LE32: 317 return &elf_howto_table[(int) R_390_TLS_LE32]; 318 case BFD_RELOC_390_TLS_LDO32: 319 return &elf_howto_table[(int) R_390_TLS_LDO32]; 320 case BFD_RELOC_390_TLS_DTPMOD: 321 return &elf_howto_table[(int) R_390_TLS_DTPMOD]; 322 case BFD_RELOC_390_TLS_DTPOFF: 323 return &elf_howto_table[(int) R_390_TLS_DTPOFF]; 324 case BFD_RELOC_390_TLS_TPOFF: 325 return &elf_howto_table[(int) R_390_TLS_TPOFF]; 326 case BFD_RELOC_390_20: 327 return &elf_howto_table[(int) R_390_20]; 328 case BFD_RELOC_390_GOT20: 329 return &elf_howto_table[(int) R_390_GOT20]; 330 case BFD_RELOC_390_GOTPLT20: 331 return &elf_howto_table[(int) R_390_GOTPLT20]; 332 case BFD_RELOC_390_TLS_GOTIE20: 333 return &elf_howto_table[(int) R_390_TLS_GOTIE20]; 334 case BFD_RELOC_VTABLE_INHERIT: 335 return &elf32_s390_vtinherit_howto; 336 case BFD_RELOC_VTABLE_ENTRY: 337 return &elf32_s390_vtentry_howto; 338 default: 339 break; 340 } 341 return 0; 342} 343 344/* We need to use ELF32_R_TYPE so we have our own copy of this function, 345 and elf32-s390.c has its own copy. */ 346 347static void 348elf_s390_info_to_howto (abfd, cache_ptr, dst) 349 bfd *abfd ATTRIBUTE_UNUSED; 350 arelent *cache_ptr; 351 Elf_Internal_Rela *dst; 352{ 353 switch (ELF32_R_TYPE(dst->r_info)) 354 { 355 case R_390_GNU_VTINHERIT: 356 cache_ptr->howto = &elf32_s390_vtinherit_howto; 357 break; 358 359 case R_390_GNU_VTENTRY: 360 cache_ptr->howto = &elf32_s390_vtentry_howto; 361 break; 362 363 default: 364 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_390_max); 365 cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)]; 366 } 367} 368 369/* A relocation function which doesn't do anything. */ 370static bfd_reloc_status_type 371s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section, 372 output_bfd, error_message) 373 bfd *abfd ATTRIBUTE_UNUSED; 374 arelent *reloc_entry; 375 asymbol *symbol ATTRIBUTE_UNUSED; 376 PTR data ATTRIBUTE_UNUSED; 377 asection *input_section; 378 bfd *output_bfd; 379 char **error_message ATTRIBUTE_UNUSED; 380{ 381 if (output_bfd) 382 reloc_entry->address += input_section->output_offset; 383 return bfd_reloc_ok; 384} 385 386/* Handle the large displacement relocs. */ 387static bfd_reloc_status_type 388s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section, 389 output_bfd, error_message) 390 bfd *abfd ATTRIBUTE_UNUSED; 391 arelent *reloc_entry; 392 asymbol *symbol; 393 PTR data ATTRIBUTE_UNUSED; 394 asection *input_section; 395 bfd *output_bfd; 396 char **error_message ATTRIBUTE_UNUSED; 397{ 398 reloc_howto_type *howto = reloc_entry->howto; 399 bfd_vma relocation; 400 bfd_vma insn; 401 402 if (output_bfd != (bfd *) NULL 403 && (symbol->flags & BSF_SECTION_SYM) == 0 404 && (! howto->partial_inplace 405 || reloc_entry->addend == 0)) 406 { 407 reloc_entry->address += input_section->output_offset; 408 return bfd_reloc_ok; 409 } 410 411 if (output_bfd != NULL) 412 return bfd_reloc_continue; 413 414 if (reloc_entry->address > input_section->_cooked_size) 415 return bfd_reloc_outofrange; 416 417 relocation = (symbol->value 418 + symbol->section->output_section->vma 419 + symbol->section->output_offset); 420 relocation += reloc_entry->addend; 421 if (howto->pc_relative) 422 { 423 relocation -= (input_section->output_section->vma 424 + input_section->output_offset); 425 relocation -= reloc_entry->address; 426 } 427 428 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); 429 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; 430 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); 431 432 if ((bfd_signed_vma) relocation < - 0x80000 433 || (bfd_signed_vma) relocation > 0x7ffff) 434 return bfd_reloc_overflow; 435 else 436 return bfd_reloc_ok; 437} 438 439static bfd_boolean 440elf_s390_is_local_label_name (abfd, name) 441 bfd *abfd; 442 const char *name; 443{ 444 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) 445 return TRUE; 446 447 return _bfd_elf_is_local_label_name (abfd, name); 448} 449 450/* Functions for the 390 ELF linker. */ 451 452/* The name of the dynamic interpreter. This is put in the .interp 453 section. */ 454 455#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 456 457/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 458 copying dynamic variables from a shared lib into an app's dynbss 459 section, and instead use a dynamic relocation to point into the 460 shared lib. */ 461#define ELIMINATE_COPY_RELOCS 1 462 463/* The size in bytes of the first entry in the procedure linkage table. */ 464#define PLT_FIRST_ENTRY_SIZE 32 465/* The size in bytes of an entry in the procedure linkage table. */ 466#define PLT_ENTRY_SIZE 32 467 468#define GOT_ENTRY_SIZE 4 469 470/* The first three entries in a procedure linkage table are reserved, 471 and the initial contents are unimportant (we zero them out). 472 Subsequent entries look like this. See the SVR4 ABI 386 473 supplement to see how this works. */ 474 475/* For the s390, simple addr offset can only be 0 - 4096. 476 To use the full 2 GB address space, several instructions 477 are needed to load an address in a register and execute 478 a branch( or just saving the address) 479 480 Furthermore, only r 0 and 1 are free to use!!! */ 481 482/* The first 3 words in the GOT are then reserved. 483 Word 0 is the address of the dynamic table. 484 Word 1 is a pointer to a structure describing the object 485 Word 2 is used to point to the loader entry address. 486 487 The code for position independent PLT entries looks like this: 488 489 r12 holds addr of the current GOT at entry to the PLT 490 491 The GOT holds the address in the PLT to be executed. 492 The loader then gets: 493 24(15) = Pointer to the structure describing the object. 494 28(15) = Offset in symbol table 495 496 The loader must then find the module where the function is 497 and insert the address in the GOT. 498 499 Note: 390 can only address +- 64 K relative. 500 We check if offset > 65536, then make a relative branch -64xxx 501 back to a previous defined branch 502 503PLT1: BASR 1,0 # 2 bytes 504 L 1,22(1) # 4 bytes Load offset in GOT in r 1 505 L 1,(1,12) # 4 bytes Load address from GOT in r1 506 BCR 15,1 # 2 bytes Jump to address 507RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 508 L 1,14(1) # 4 bytes Load offset in symol table in r1 509 BRC 15,-x # 4 bytes Jump to start of PLT 510 .word 0 # 2 bytes filler 511 .long ? # 4 bytes offset in GOT 512 .long ? # 4 bytes offset into symbol table 513 514 This was the general case. There are two additional, optimizes PLT 515 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768. 516 First the one for GOT offsets < 4096: 517 518PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1 519 BCR 15,1 # 2 bytes Jump to address 520 .word 0,0,0 # 6 bytes filler 521RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 522 L 1,14(1) # 4 bytes Load offset in symbol table in r1 523 BRC 15,-x # 4 bytes Jump to start of PLT 524 .word 0,0,0 # 6 bytes filler 525 .long ? # 4 bytes offset into symbol table 526 527 Second the one for GOT offsets < 32768: 528 529PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1 530 L 1,(1,12) # 4 bytes Load address from GOT to r1 531 BCR 15,1 # 2 bytes Jump to address 532 .word 0 # 2 bytes filler 533RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 534 L 1,14(1) # 4 bytes Load offset in symbol table in r1 535 BRC 15,-x # 4 bytes Jump to start of PLT 536 .word 0,0,0 # 6 bytes filler 537 .long ? # 4 bytes offset into symbol table 538 539Total = 32 bytes per PLT entry 540 541 The code for static build PLT entries looks like this: 542 543PLT1: BASR 1,0 # 2 bytes 544 L 1,22(1) # 4 bytes Load address of GOT entry 545 L 1,0(0,1) # 4 bytes Load address from GOT in r1 546 BCR 15,1 # 2 bytes Jump to address 547RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 548 L 1,14(1) # 4 bytes Load offset in symbol table in r1 549 BRC 15,-x # 4 bytes Jump to start of PLT 550 .word 0 # 2 bytes filler 551 .long ? # 4 bytes address of GOT entry 552 .long ? # 4 bytes offset into symbol table */ 553 554#define PLT_PIC_ENTRY_WORD0 0x0d105810 555#define PLT_PIC_ENTRY_WORD1 0x10165811 556#define PLT_PIC_ENTRY_WORD2 0xc00007f1 557#define PLT_PIC_ENTRY_WORD3 0x0d105810 558#define PLT_PIC_ENTRY_WORD4 0x100ea7f4 559 560#define PLT_PIC12_ENTRY_WORD0 0x5810c000 561#define PLT_PIC12_ENTRY_WORD1 0x07f10000 562#define PLT_PIC12_ENTRY_WORD2 0x00000000 563#define PLT_PIC12_ENTRY_WORD3 0x0d105810 564#define PLT_PIC12_ENTRY_WORD4 0x100ea7f4 565 566#define PLT_PIC16_ENTRY_WORD0 0xa7180000 567#define PLT_PIC16_ENTRY_WORD1 0x5811c000 568#define PLT_PIC16_ENTRY_WORD2 0x07f10000 569#define PLT_PIC16_ENTRY_WORD3 0x0d105810 570#define PLT_PIC16_ENTRY_WORD4 0x100ea7f4 571 572#define PLT_ENTRY_WORD0 0x0d105810 573#define PLT_ENTRY_WORD1 0x10165810 574#define PLT_ENTRY_WORD2 0x100007f1 575#define PLT_ENTRY_WORD3 0x0d105810 576#define PLT_ENTRY_WORD4 0x100ea7f4 577 578/* The first PLT entry pushes the offset into the symbol table 579 from R1 onto the stack at 8(15) and the loader object info 580 at 12(15), loads the loader address in R1 and jumps to it. */ 581 582/* The first entry in the PLT for PIC code: 583 584PLT0: 585 ST 1,28(15) # R1 has offset into symbol table 586 L 1,4(12) # Get loader ino(object struct address) 587 ST 1,24(15) # Store address 588 L 1,8(12) # Entry address of loader in R1 589 BR 1 # Jump to loader 590 591 The first entry in the PLT for static code: 592 593PLT0: 594 ST 1,28(15) # R1 has offset into symbol table 595 BASR 1,0 596 L 1,18(0,1) # Get address of GOT 597 MVC 24(4,15),4(1) # Move loader ino to stack 598 L 1,8(1) # Get address of loader 599 BR 1 # Jump to loader 600 .word 0 # filler 601 .long got # address of GOT */ 602 603#define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c 604#define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004 605#define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018 606#define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008 607#define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000 608 609#define PLT_FIRST_ENTRY_WORD0 0x5010f01c 610#define PLT_FIRST_ENTRY_WORD1 0x0d105810 611#define PLT_FIRST_ENTRY_WORD2 0x1012D203 612#define PLT_FIRST_ENTRY_WORD3 0xf0181004 613#define PLT_FIRST_ENTRY_WORD4 0x58101008 614#define PLT_FIRST_ENTRY_WORD5 0x07f10000 615 616/* The s390 linker needs to keep track of the number of relocs that it 617 decides to copy as dynamic relocs in check_relocs for each symbol. 618 This is so that it can later discard them if they are found to be 619 unnecessary. We store the information in a field extending the 620 regular ELF linker hash table. */ 621 622struct elf_s390_dyn_relocs 623{ 624 struct elf_s390_dyn_relocs *next; 625 626 /* The input section of the reloc. */ 627 asection *sec; 628 629 /* Total number of relocs copied for the input section. */ 630 bfd_size_type count; 631 632 /* Number of pc-relative relocs copied for the input section. */ 633 bfd_size_type pc_count; 634}; 635 636/* s390 ELF linker hash entry. */ 637 638struct elf_s390_link_hash_entry 639{ 640 struct elf_link_hash_entry elf; 641 642 /* Track dynamic relocs copied for this symbol. */ 643 struct elf_s390_dyn_relocs *dyn_relocs; 644 645 /* Number of GOTPLT references for a function. */ 646 bfd_signed_vma gotplt_refcount; 647 648#define GOT_UNKNOWN 0 649#define GOT_NORMAL 1 650#define GOT_TLS_GD 2 651#define GOT_TLS_IE 3 652#define GOT_TLS_IE_NLT 4 653 unsigned char tls_type; 654}; 655 656#define elf_s390_hash_entry(ent) \ 657 ((struct elf_s390_link_hash_entry *)(ent)) 658 659struct elf_s390_obj_tdata 660{ 661 struct elf_obj_tdata root; 662 663 /* tls_type for each local got entry. */ 664 char *local_got_tls_type; 665}; 666 667#define elf_s390_tdata(abfd) \ 668 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) 669 670#define elf_s390_local_got_tls_type(abfd) \ 671 (elf_s390_tdata (abfd)->local_got_tls_type) 672 673static bfd_boolean 674elf_s390_mkobject (abfd) 675 bfd *abfd; 676{ 677 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); 678 abfd->tdata.any = bfd_zalloc (abfd, amt); 679 if (abfd->tdata.any == NULL) 680 return FALSE; 681 return TRUE; 682} 683 684static bfd_boolean 685elf_s390_object_p (abfd) 686 bfd *abfd; 687{ 688 /* Set the right machine number for an s390 elf32 file. */ 689 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31); 690} 691 692/* s390 ELF linker hash table. */ 693 694struct elf_s390_link_hash_table 695{ 696 struct elf_link_hash_table elf; 697 698 /* Short-cuts to get to dynamic linker sections. */ 699 asection *sgot; 700 asection *sgotplt; 701 asection *srelgot; 702 asection *splt; 703 asection *srelplt; 704 asection *sdynbss; 705 asection *srelbss; 706 707 union { 708 bfd_signed_vma refcount; 709 bfd_vma offset; 710 } tls_ldm_got; 711 712 /* Small local sym to section mapping cache. */ 713 struct sym_sec_cache sym_sec; 714}; 715 716/* Get the s390 ELF linker hash table from a link_info structure. */ 717 718#define elf_s390_hash_table(p) \ 719 ((struct elf_s390_link_hash_table *) ((p)->hash)) 720 721/* Create an entry in an s390 ELF linker hash table. */ 722 723static struct bfd_hash_entry * 724link_hash_newfunc (entry, table, string) 725 struct bfd_hash_entry *entry; 726 struct bfd_hash_table *table; 727 const char *string; 728{ 729 /* Allocate the structure if it has not already been allocated by a 730 subclass. */ 731 if (entry == NULL) 732 { 733 entry = bfd_hash_allocate (table, 734 sizeof (struct elf_s390_link_hash_entry)); 735 if (entry == NULL) 736 return entry; 737 } 738 739 /* Call the allocation method of the superclass. */ 740 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 741 if (entry != NULL) 742 { 743 struct elf_s390_link_hash_entry *eh; 744 745 eh = (struct elf_s390_link_hash_entry *) entry; 746 eh->dyn_relocs = NULL; 747 eh->gotplt_refcount = 0; 748 eh->tls_type = GOT_UNKNOWN; 749 } 750 751 return entry; 752} 753 754/* Create an s390 ELF linker hash table. */ 755 756static struct bfd_link_hash_table * 757elf_s390_link_hash_table_create (abfd) 758 bfd *abfd; 759{ 760 struct elf_s390_link_hash_table *ret; 761 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); 762 763 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt); 764 if (ret == NULL) 765 return NULL; 766 767 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc)) 768 { 769 free (ret); 770 return NULL; 771 } 772 773 ret->sgot = NULL; 774 ret->sgotplt = NULL; 775 ret->srelgot = NULL; 776 ret->splt = NULL; 777 ret->srelplt = NULL; 778 ret->sdynbss = NULL; 779 ret->srelbss = NULL; 780 ret->tls_ldm_got.refcount = 0; 781 ret->sym_sec.abfd = NULL; 782 783 return &ret->elf.root; 784} 785 786/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up 787 shortcuts to them in our hash table. */ 788 789static bfd_boolean 790create_got_section (dynobj, info) 791 bfd *dynobj; 792 struct bfd_link_info *info; 793{ 794 struct elf_s390_link_hash_table *htab; 795 796 if (! _bfd_elf_create_got_section (dynobj, info)) 797 return FALSE; 798 799 htab = elf_s390_hash_table (info); 800 htab->sgot = bfd_get_section_by_name (dynobj, ".got"); 801 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); 802 if (!htab->sgot || !htab->sgotplt) 803 abort (); 804 805 htab->srelgot = bfd_make_section (dynobj, ".rela.got"); 806 if (htab->srelgot == NULL 807 || ! bfd_set_section_flags (dynobj, htab->srelgot, 808 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 809 | SEC_IN_MEMORY | SEC_LINKER_CREATED 810 | SEC_READONLY)) 811 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) 812 return FALSE; 813 return TRUE; 814} 815 816/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and 817 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our 818 hash table. */ 819 820static bfd_boolean 821elf_s390_create_dynamic_sections (dynobj, info) 822 bfd *dynobj; 823 struct bfd_link_info *info; 824{ 825 struct elf_s390_link_hash_table *htab; 826 827 htab = elf_s390_hash_table (info); 828 if (!htab->sgot && !create_got_section (dynobj, info)) 829 return FALSE; 830 831 if (!_bfd_elf_create_dynamic_sections (dynobj, info)) 832 return FALSE; 833 834 htab->splt = bfd_get_section_by_name (dynobj, ".plt"); 835 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); 836 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); 837 if (!info->shared) 838 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); 839 840 if (!htab->splt || !htab->srelplt || !htab->sdynbss 841 || (!info->shared && !htab->srelbss)) 842 abort (); 843 844 return TRUE; 845} 846 847/* Copy the extra info we tack onto an elf_link_hash_entry. */ 848 849static void 850elf_s390_copy_indirect_symbol (bed, dir, ind) 851 const struct elf_backend_data *bed; 852 struct elf_link_hash_entry *dir, *ind; 853{ 854 struct elf_s390_link_hash_entry *edir, *eind; 855 856 edir = (struct elf_s390_link_hash_entry *) dir; 857 eind = (struct elf_s390_link_hash_entry *) ind; 858 859 if (eind->dyn_relocs != NULL) 860 { 861 if (edir->dyn_relocs != NULL) 862 { 863 struct elf_s390_dyn_relocs **pp; 864 struct elf_s390_dyn_relocs *p; 865 866 if (ind->root.type == bfd_link_hash_indirect) 867 abort (); 868 869 /* Add reloc counts against the weak sym to the strong sym 870 list. Merge any entries against the same section. */ 871 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 872 { 873 struct elf_s390_dyn_relocs *q; 874 875 for (q = edir->dyn_relocs; q != NULL; q = q->next) 876 if (q->sec == p->sec) 877 { 878 q->pc_count += p->pc_count; 879 q->count += p->count; 880 *pp = p->next; 881 break; 882 } 883 if (q == NULL) 884 pp = &p->next; 885 } 886 *pp = edir->dyn_relocs; 887 } 888 889 edir->dyn_relocs = eind->dyn_relocs; 890 eind->dyn_relocs = NULL; 891 } 892 893 if (ind->root.type == bfd_link_hash_indirect 894 && dir->got.refcount <= 0) 895 { 896 edir->tls_type = eind->tls_type; 897 eind->tls_type = GOT_UNKNOWN; 898 } 899 900 if (ELIMINATE_COPY_RELOCS 901 && ind->root.type != bfd_link_hash_indirect 902 && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) 903 /* If called to transfer flags for a weakdef during processing 904 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF. 905 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 906 dir->elf_link_hash_flags |= 907 (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC 908 | ELF_LINK_HASH_REF_REGULAR 909 | ELF_LINK_HASH_REF_REGULAR_NONWEAK 910 | ELF_LINK_HASH_NEEDS_PLT)); 911 else 912 _bfd_elf_link_hash_copy_indirect (bed, dir, ind); 913} 914 915static int 916elf_s390_tls_transition (info, r_type, is_local) 917 struct bfd_link_info *info; 918 int r_type; 919 int is_local; 920{ 921 if (info->shared) 922 return r_type; 923 924 switch (r_type) 925 { 926 case R_390_TLS_GD32: 927 case R_390_TLS_IE32: 928 if (is_local) 929 return R_390_TLS_LE32; 930 return R_390_TLS_IE32; 931 case R_390_TLS_GOTIE32: 932 if (is_local) 933 return R_390_TLS_LE32; 934 return R_390_TLS_GOTIE32; 935 case R_390_TLS_LDM32: 936 return R_390_TLS_LE32; 937 } 938 939 return r_type; 940} 941 942/* Look through the relocs for a section during the first phase, and 943 allocate space in the global offset table or procedure linkage 944 table. */ 945 946static bfd_boolean 947elf_s390_check_relocs (abfd, info, sec, relocs) 948 bfd *abfd; 949 struct bfd_link_info *info; 950 asection *sec; 951 const Elf_Internal_Rela *relocs; 952{ 953 struct elf_s390_link_hash_table *htab; 954 Elf_Internal_Shdr *symtab_hdr; 955 struct elf_link_hash_entry **sym_hashes; 956 const Elf_Internal_Rela *rel; 957 const Elf_Internal_Rela *rel_end; 958 asection *sreloc; 959 bfd_signed_vma *local_got_refcounts; 960 int tls_type, old_tls_type; 961 962 if (info->relocatable) 963 return TRUE; 964 965 htab = elf_s390_hash_table (info); 966 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 967 sym_hashes = elf_sym_hashes (abfd); 968 local_got_refcounts = elf_local_got_refcounts (abfd); 969 970 sreloc = NULL; 971 972 rel_end = relocs + sec->reloc_count; 973 for (rel = relocs; rel < rel_end; rel++) 974 { 975 unsigned int r_type; 976 unsigned long r_symndx; 977 struct elf_link_hash_entry *h; 978 979 r_symndx = ELF32_R_SYM (rel->r_info); 980 981 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) 982 { 983 (*_bfd_error_handler) (_("%s: bad symbol index: %d"), 984 bfd_archive_filename (abfd), 985 r_symndx); 986 return FALSE; 987 } 988 989 if (r_symndx < symtab_hdr->sh_info) 990 h = NULL; 991 else 992 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 993 994 /* Create got section and local_got_refcounts array if they 995 are needed. */ 996 r_type = elf_s390_tls_transition (info, 997 ELF32_R_TYPE (rel->r_info), 998 h == NULL); 999 switch (r_type) 1000 { 1001 case R_390_GOT12: 1002 case R_390_GOT16: 1003 case R_390_GOT20: 1004 case R_390_GOT32: 1005 case R_390_GOTENT: 1006 case R_390_GOTPLT12: 1007 case R_390_GOTPLT16: 1008 case R_390_GOTPLT20: 1009 case R_390_GOTPLT32: 1010 case R_390_GOTPLTENT: 1011 case R_390_TLS_GD32: 1012 case R_390_TLS_GOTIE12: 1013 case R_390_TLS_GOTIE20: 1014 case R_390_TLS_GOTIE32: 1015 case R_390_TLS_IEENT: 1016 case R_390_TLS_IE32: 1017 case R_390_TLS_LDM32: 1018 if (h == NULL 1019 && local_got_refcounts == NULL) 1020 { 1021 bfd_size_type size; 1022 1023 size = symtab_hdr->sh_info; 1024 size *= (sizeof (bfd_signed_vma) + sizeof(char)); 1025 local_got_refcounts = ((bfd_signed_vma *) 1026 bfd_zalloc (abfd, size)); 1027 if (local_got_refcounts == NULL) 1028 return FALSE; 1029 elf_local_got_refcounts (abfd) = local_got_refcounts; 1030 elf_s390_local_got_tls_type (abfd) 1031 = (char *) (local_got_refcounts + symtab_hdr->sh_info); 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->sgot == NULL) 1039 { 1040 if (htab->elf.dynobj == NULL) 1041 htab->elf.dynobj = abfd; 1042 if (!create_got_section (htab->elf.dynobj, info)) 1043 return FALSE; 1044 } 1045 } 1046 1047 switch (r_type) 1048 { 1049 case R_390_GOTOFF16: 1050 case R_390_GOTOFF32: 1051 case R_390_GOTPC: 1052 case R_390_GOTPCDBL: 1053 /* Got is created, nothing to be done. */ 1054 break; 1055 1056 case R_390_PLT16DBL: 1057 case R_390_PLT32DBL: 1058 case R_390_PLT32: 1059 case R_390_PLTOFF16: 1060 case R_390_PLTOFF32: 1061 /* This symbol requires a procedure linkage table entry. We 1062 actually build the entry in adjust_dynamic_symbol, 1063 because this might be a case of linking PIC code which is 1064 never referenced by a dynamic object, in which case we 1065 don't need to generate a procedure linkage table entry 1066 after all. */ 1067 1068 /* If this is a local symbol, we resolve it directly without 1069 creating a procedure linkage table entry. */ 1070 if (h != NULL) 1071 { 1072 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; 1073 h->plt.refcount += 1; 1074 } 1075 break; 1076 1077 case R_390_GOTPLT12: 1078 case R_390_GOTPLT16: 1079 case R_390_GOTPLT20: 1080 case R_390_GOTPLT32: 1081 case R_390_GOTPLTENT: 1082 /* This symbol requires either a procedure linkage table entry 1083 or an entry in the local got. We actually build the entry 1084 in adjust_dynamic_symbol because whether this is really a 1085 global reference can change and with it the fact if we have 1086 to create a plt entry or a local got entry. To be able to 1087 make a once global symbol a local one we have to keep track 1088 of the number of gotplt references that exist for this 1089 symbol. */ 1090 if (h != NULL) 1091 { 1092 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; 1093 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; 1094 h->plt.refcount += 1; 1095 } 1096 else 1097 local_got_refcounts[r_symndx] += 1; 1098 break; 1099 1100 case R_390_TLS_LDM32: 1101 htab->tls_ldm_got.refcount += 1; 1102 break; 1103 1104 case R_390_TLS_IE32: 1105 case R_390_TLS_GOTIE12: 1106 case R_390_TLS_GOTIE20: 1107 case R_390_TLS_GOTIE32: 1108 case R_390_TLS_IEENT: 1109 if (info->shared) 1110 info->flags |= DF_STATIC_TLS; 1111 /* Fall through. */ 1112 1113 case R_390_GOT12: 1114 case R_390_GOT16: 1115 case R_390_GOT20: 1116 case R_390_GOT32: 1117 case R_390_GOTENT: 1118 case R_390_TLS_GD32: 1119 /* This symbol requires a global offset table entry. */ 1120 switch (r_type) 1121 { 1122 default: 1123 case R_390_GOT12: 1124 case R_390_GOT16: 1125 case R_390_GOT20: 1126 case R_390_GOT32: 1127 case R_390_GOTENT: 1128 tls_type = GOT_NORMAL; 1129 break; 1130 case R_390_TLS_GD32: 1131 tls_type = GOT_TLS_GD; 1132 break; 1133 case R_390_TLS_IE32: 1134 case R_390_TLS_GOTIE32: 1135 tls_type = GOT_TLS_IE; 1136 break; 1137 case R_390_TLS_GOTIE12: 1138 case R_390_TLS_GOTIE20: 1139 case R_390_TLS_IEENT: 1140 tls_type = GOT_TLS_IE_NLT; 1141 break; 1142 } 1143 1144 if (h != NULL) 1145 { 1146 h->got.refcount += 1; 1147 old_tls_type = elf_s390_hash_entry(h)->tls_type; 1148 } 1149 else 1150 { 1151 local_got_refcounts[r_symndx] += 1; 1152 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; 1153 } 1154 /* If a TLS symbol is accessed using IE at least once, 1155 there is no point to use dynamic model for it. */ 1156 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) 1157 { 1158 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) 1159 { 1160 (*_bfd_error_handler) 1161 (_("%s: `%s' accessed both as normal and thread local symbol"), 1162 bfd_archive_filename (abfd), h->root.root.string); 1163 return FALSE; 1164 } 1165 if (old_tls_type > tls_type) 1166 tls_type = old_tls_type; 1167 } 1168 1169 if (old_tls_type != tls_type) 1170 { 1171 if (h != NULL) 1172 elf_s390_hash_entry (h)->tls_type = tls_type; 1173 else 1174 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; 1175 } 1176 1177 if (r_type != R_390_TLS_IE32) 1178 break; 1179 /* Fall through. */ 1180 1181 case R_390_TLS_LE32: 1182 if (!info->shared) 1183 break; 1184 info->flags |= DF_STATIC_TLS; 1185 /* Fall through. */ 1186 1187 case R_390_8: 1188 case R_390_16: 1189 case R_390_32: 1190 case R_390_PC16: 1191 case R_390_PC16DBL: 1192 case R_390_PC32DBL: 1193 case R_390_PC32: 1194 if (h != NULL && !info->shared) 1195 { 1196 /* If this reloc is in a read-only section, we might 1197 need a copy reloc. We can't check reliably at this 1198 stage whether the section is read-only, as input 1199 sections have not yet been mapped to output sections. 1200 Tentatively set the flag for now, and correct in 1201 adjust_dynamic_symbol. */ 1202 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; 1203 1204 /* We may need a .plt entry if the function this reloc 1205 refers to is in a shared lib. */ 1206 h->plt.refcount += 1; 1207 } 1208 1209 /* If we are creating a shared library, and this is a reloc 1210 against a global symbol, or a non PC relative reloc 1211 against a local symbol, then we need to copy the reloc 1212 into the shared library. However, if we are linking with 1213 -Bsymbolic, we do not need to copy a reloc against a 1214 global symbol which is defined in an object we are 1215 including in the link (i.e., DEF_REGULAR is set). At 1216 this point we have not seen all the input files, so it is 1217 possible that DEF_REGULAR is not set now but will be set 1218 later (it is never cleared). In case of a weak definition, 1219 DEF_REGULAR may be cleared later by a strong definition in 1220 a shared library. We account for that possibility below by 1221 storing information in the relocs_copied field of the hash 1222 table entry. A similar situation occurs when creating 1223 shared libraries and symbol visibility changes render the 1224 symbol local. 1225 1226 If on the other hand, we are creating an executable, we 1227 may need to keep relocations for symbols satisfied by a 1228 dynamic library if we manage to avoid copy relocs for the 1229 symbol. */ 1230 if ((info->shared 1231 && (sec->flags & SEC_ALLOC) != 0 1232 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16 1233 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL 1234 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL 1235 && ELF32_R_TYPE (rel->r_info) != R_390_PC32) 1236 || (h != NULL 1237 && (! info->symbolic 1238 || h->root.type == bfd_link_hash_defweak 1239 || (h->elf_link_hash_flags 1240 & ELF_LINK_HASH_DEF_REGULAR) == 0)))) 1241 || (ELIMINATE_COPY_RELOCS 1242 && !info->shared 1243 && (sec->flags & SEC_ALLOC) != 0 1244 && h != NULL 1245 && (h->root.type == bfd_link_hash_defweak 1246 || (h->elf_link_hash_flags 1247 & ELF_LINK_HASH_DEF_REGULAR) == 0))) 1248 { 1249 struct elf_s390_dyn_relocs *p; 1250 struct elf_s390_dyn_relocs **head; 1251 1252 /* We must copy these reloc types into the output file. 1253 Create a reloc section in dynobj and make room for 1254 this reloc. */ 1255 if (sreloc == NULL) 1256 { 1257 const char *name; 1258 bfd *dynobj; 1259 1260 name = (bfd_elf_string_from_elf_section 1261 (abfd, 1262 elf_elfheader (abfd)->e_shstrndx, 1263 elf_section_data (sec)->rel_hdr.sh_name)); 1264 if (name == NULL) 1265 return FALSE; 1266 1267 if (strncmp (name, ".rela", 5) != 0 1268 || strcmp (bfd_get_section_name (abfd, sec), 1269 name + 5) != 0) 1270 { 1271 (*_bfd_error_handler) 1272 (_("%s: bad relocation section name `%s\'"), 1273 bfd_archive_filename (abfd), name); 1274 } 1275 1276 if (htab->elf.dynobj == NULL) 1277 htab->elf.dynobj = abfd; 1278 1279 dynobj = htab->elf.dynobj; 1280 sreloc = bfd_get_section_by_name (dynobj, name); 1281 if (sreloc == NULL) 1282 { 1283 flagword flags; 1284 1285 sreloc = bfd_make_section (dynobj, name); 1286 flags = (SEC_HAS_CONTENTS | SEC_READONLY 1287 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 1288 if ((sec->flags & SEC_ALLOC) != 0) 1289 flags |= SEC_ALLOC | SEC_LOAD; 1290 if (sreloc == NULL 1291 || ! bfd_set_section_flags (dynobj, sreloc, flags) 1292 || ! bfd_set_section_alignment (dynobj, sreloc, 2)) 1293 return FALSE; 1294 } 1295 elf_section_data (sec)->sreloc = sreloc; 1296 } 1297 1298 /* If this is a global symbol, we count the number of 1299 relocations we need for this symbol. */ 1300 if (h != NULL) 1301 { 1302 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; 1303 } 1304 else 1305 { 1306 /* Track dynamic relocs needed for local syms too. 1307 We really need local syms available to do this 1308 easily. Oh well. */ 1309 asection *s; 1310 1311 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, 1312 sec, r_symndx); 1313 if (s == NULL) 1314 return FALSE; 1315 1316 head = ((struct elf_s390_dyn_relocs **) 1317 &elf_section_data (s)->local_dynrel); 1318 } 1319 1320 p = *head; 1321 if (p == NULL || p->sec != sec) 1322 { 1323 bfd_size_type amt = sizeof *p; 1324 1325 p = ((struct elf_s390_dyn_relocs *) 1326 bfd_alloc (htab->elf.dynobj, amt)); 1327 if (p == NULL) 1328 return FALSE; 1329 p->next = *head; 1330 *head = p; 1331 p->sec = sec; 1332 p->count = 0; 1333 p->pc_count = 0; 1334 } 1335 1336 p->count += 1; 1337 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16 1338 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL 1339 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL 1340 || ELF32_R_TYPE (rel->r_info) == R_390_PC32) 1341 p->pc_count += 1; 1342 } 1343 break; 1344 1345 /* This relocation describes the C++ object vtable hierarchy. 1346 Reconstruct it for later use during GC. */ 1347 case R_390_GNU_VTINHERIT: 1348 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1349 return FALSE; 1350 break; 1351 1352 /* This relocation describes which C++ vtable entries are actually 1353 used. Record for later use during GC. */ 1354 case R_390_GNU_VTENTRY: 1355 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1356 return FALSE; 1357 break; 1358 1359 default: 1360 break; 1361 } 1362 } 1363 1364 return TRUE; 1365} 1366 1367/* Return the section that should be marked against GC for a given 1368 relocation. */ 1369 1370static asection * 1371elf_s390_gc_mark_hook (sec, info, rel, h, sym) 1372 asection *sec; 1373 struct bfd_link_info *info ATTRIBUTE_UNUSED; 1374 Elf_Internal_Rela *rel; 1375 struct elf_link_hash_entry *h; 1376 Elf_Internal_Sym *sym; 1377{ 1378 if (h != NULL) 1379 { 1380 switch (ELF32_R_TYPE (rel->r_info)) 1381 { 1382 case R_390_GNU_VTINHERIT: 1383 case R_390_GNU_VTENTRY: 1384 break; 1385 1386 default: 1387 switch (h->root.type) 1388 { 1389 case bfd_link_hash_defined: 1390 case bfd_link_hash_defweak: 1391 return h->root.u.def.section; 1392 1393 case bfd_link_hash_common: 1394 return h->root.u.c.p->section; 1395 1396 default: 1397 break; 1398 } 1399 } 1400 } 1401 else 1402 return bfd_section_from_elf_index (sec->owner, sym->st_shndx); 1403 1404 return NULL; 1405} 1406 1407/* Update the got entry reference counts for the section being removed. */ 1408 1409static bfd_boolean 1410elf_s390_gc_sweep_hook (abfd, info, sec, relocs) 1411 bfd *abfd; 1412 struct bfd_link_info *info; 1413 asection *sec; 1414 const Elf_Internal_Rela *relocs; 1415{ 1416 Elf_Internal_Shdr *symtab_hdr; 1417 struct elf_link_hash_entry **sym_hashes; 1418 bfd_signed_vma *local_got_refcounts; 1419 const Elf_Internal_Rela *rel, *relend; 1420 1421 elf_section_data (sec)->local_dynrel = NULL; 1422 1423 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1424 sym_hashes = elf_sym_hashes (abfd); 1425 local_got_refcounts = elf_local_got_refcounts (abfd); 1426 1427 relend = relocs + sec->reloc_count; 1428 for (rel = relocs; rel < relend; rel++) 1429 { 1430 unsigned long r_symndx; 1431 unsigned int r_type; 1432 struct elf_link_hash_entry *h = NULL; 1433 1434 r_symndx = ELF32_R_SYM (rel->r_info); 1435 if (r_symndx >= symtab_hdr->sh_info) 1436 { 1437 struct elf_s390_link_hash_entry *eh; 1438 struct elf_s390_dyn_relocs **pp; 1439 struct elf_s390_dyn_relocs *p; 1440 1441 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1442 eh = (struct elf_s390_link_hash_entry *) h; 1443 1444 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 1445 if (p->sec == sec) 1446 { 1447 /* Everything must go for SEC. */ 1448 *pp = p->next; 1449 break; 1450 } 1451 } 1452 1453 r_type = ELF32_R_TYPE (rel->r_info); 1454 r_type = elf_s390_tls_transition (info, r_type, h != NULL); 1455 switch (r_type) 1456 { 1457 case R_390_TLS_LDM32: 1458 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) 1459 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; 1460 break; 1461 1462 case R_390_TLS_GD32: 1463 case R_390_TLS_IE32: 1464 case R_390_TLS_GOTIE12: 1465 case R_390_TLS_GOTIE20: 1466 case R_390_TLS_GOTIE32: 1467 case R_390_TLS_IEENT: 1468 case R_390_GOT12: 1469 case R_390_GOT16: 1470 case R_390_GOT20: 1471 case R_390_GOT32: 1472 case R_390_GOTOFF16: 1473 case R_390_GOTOFF32: 1474 case R_390_GOTPC: 1475 case R_390_GOTPCDBL: 1476 case R_390_GOTENT: 1477 if (h != NULL) 1478 { 1479 if (h->got.refcount > 0) 1480 h->got.refcount -= 1; 1481 } 1482 else if (local_got_refcounts != NULL) 1483 { 1484 if (local_got_refcounts[r_symndx] > 0) 1485 local_got_refcounts[r_symndx] -= 1; 1486 } 1487 break; 1488 1489 case R_390_8: 1490 case R_390_12: 1491 case R_390_16: 1492 case R_390_20: 1493 case R_390_32: 1494 case R_390_PC16: 1495 case R_390_PC16DBL: 1496 case R_390_PC32DBL: 1497 case R_390_PC32: 1498 if (info->shared) 1499 break; 1500 /* Fall through. */ 1501 1502 case R_390_PLT16DBL: 1503 case R_390_PLT32DBL: 1504 case R_390_PLT32: 1505 case R_390_PLTOFF16: 1506 case R_390_PLTOFF32: 1507 if (h != NULL) 1508 { 1509 if (h->plt.refcount > 0) 1510 h->plt.refcount -= 1; 1511 } 1512 break; 1513 1514 case R_390_GOTPLT12: 1515 case R_390_GOTPLT16: 1516 case R_390_GOTPLT20: 1517 case R_390_GOTPLT32: 1518 case R_390_GOTPLTENT: 1519 if (h != NULL) 1520 { 1521 if (h->plt.refcount > 0) 1522 { 1523 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; 1524 h->plt.refcount -= 1; 1525 } 1526 } 1527 else if (local_got_refcounts != NULL) 1528 { 1529 if (local_got_refcounts[r_symndx] > 0) 1530 local_got_refcounts[r_symndx] -= 1; 1531 } 1532 break; 1533 1534 default: 1535 break; 1536 } 1537 } 1538 1539 return TRUE; 1540} 1541 1542/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT 1543 entry but we found we will not create any. Called when we find we will 1544 not have any PLT for this symbol, by for example 1545 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, 1546 or elf_s390_size_dynamic_sections if no dynamic sections will be 1547 created (we're only linking static objects). */ 1548 1549static void 1550elf_s390_adjust_gotplt (h) 1551 struct elf_s390_link_hash_entry *h; 1552{ 1553 if (h->elf.root.type == bfd_link_hash_warning) 1554 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; 1555 1556 if (h->gotplt_refcount <= 0) 1557 return; 1558 1559 /* We simply add the number of gotplt references to the number 1560 * of got references for this symbol. */ 1561 h->elf.got.refcount += h->gotplt_refcount; 1562 h->gotplt_refcount = -1; 1563} 1564 1565/* Adjust a symbol defined by a dynamic object and referenced by a 1566 regular object. The current definition is in some section of the 1567 dynamic object, but we're not including those sections. We have to 1568 change the definition to something the rest of the link can 1569 understand. */ 1570 1571static bfd_boolean 1572elf_s390_adjust_dynamic_symbol (info, h) 1573 struct bfd_link_info *info; 1574 struct elf_link_hash_entry *h; 1575{ 1576 struct elf_s390_link_hash_table *htab; 1577 asection *s; 1578 unsigned int power_of_two; 1579 1580 /* If this is a function, put it in the procedure linkage table. We 1581 will fill in the contents of the procedure linkage table later 1582 (although we could actually do it here). */ 1583 if (h->type == STT_FUNC 1584 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) 1585 { 1586 if (h->plt.refcount <= 0 1587 || (! info->shared 1588 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 1589 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 1590 && h->root.type != bfd_link_hash_undefweak 1591 && h->root.type != bfd_link_hash_undefined)) 1592 { 1593 /* This case can occur if we saw a PLT32 reloc in an input 1594 file, but the symbol was never referred to by a dynamic 1595 object, or if all references were garbage collected. In 1596 such a case, we don't actually need to build a procedure 1597 linkage table, and we can just do a PC32 reloc instead. */ 1598 h->plt.offset = (bfd_vma) -1; 1599 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; 1600 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1601 } 1602 1603 return TRUE; 1604 } 1605 else 1606 /* It's possible that we incorrectly decided a .plt reloc was 1607 needed for an R_390_PC32 reloc to a non-function sym in 1608 check_relocs. We can't decide accurately between function and 1609 non-function syms in check-relocs; Objects loaded later in 1610 the link may change h->type. So fix it now. */ 1611 h->plt.offset = (bfd_vma) -1; 1612 1613 /* If this is a weak symbol, and there is a real definition, the 1614 processor independent code will have arranged for us to see the 1615 real definition first, and we can just use the same value. */ 1616 if (h->weakdef != NULL) 1617 { 1618 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined 1619 || h->weakdef->root.type == bfd_link_hash_defweak); 1620 h->root.u.def.section = h->weakdef->root.u.def.section; 1621 h->root.u.def.value = h->weakdef->root.u.def.value; 1622 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) 1623 h->elf_link_hash_flags 1624 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF) 1625 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF)); 1626 return TRUE; 1627 } 1628 1629 /* This is a reference to a symbol defined by a dynamic object which 1630 is not a function. */ 1631 1632 /* If we are creating a shared library, we must presume that the 1633 only references to the symbol are via the global offset table. 1634 For such cases we need not do anything here; the relocations will 1635 be handled correctly by relocate_section. */ 1636 if (info->shared) 1637 return TRUE; 1638 1639 /* If there are no references to this symbol that do not use the 1640 GOT, we don't need to generate a copy reloc. */ 1641 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) 1642 return TRUE; 1643 1644 /* If -z nocopyreloc was given, we won't generate them either. */ 1645 if (info->nocopyreloc) 1646 { 1647 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; 1648 return TRUE; 1649 } 1650 1651 if (ELIMINATE_COPY_RELOCS) 1652 { 1653 struct elf_s390_link_hash_entry * eh; 1654 struct elf_s390_dyn_relocs *p; 1655 1656 eh = (struct elf_s390_link_hash_entry *) h; 1657 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1658 { 1659 s = p->sec->output_section; 1660 if (s != NULL && (s->flags & SEC_READONLY) != 0) 1661 break; 1662 } 1663 1664 /* If we didn't find any dynamic relocs in read-only sections, then 1665 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 1666 if (p == NULL) 1667 { 1668 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; 1669 return TRUE; 1670 } 1671 } 1672 1673 /* We must allocate the symbol in our .dynbss section, which will 1674 become part of the .bss section of the executable. There will be 1675 an entry for this symbol in the .dynsym section. The dynamic 1676 object will contain position independent code, so all references 1677 from the dynamic object to this symbol will go through the global 1678 offset table. The dynamic linker will use the .dynsym entry to 1679 determine the address it must put in the global offset table, so 1680 both the dynamic object and the regular object will refer to the 1681 same memory location for the variable. */ 1682 1683 htab = elf_s390_hash_table (info); 1684 1685 /* We must generate a R_390_COPY reloc to tell the dynamic linker to 1686 copy the initial value out of the dynamic object and into the 1687 runtime process image. */ 1688 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) 1689 { 1690 htab->srelbss->_raw_size += sizeof (Elf32_External_Rela); 1691 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; 1692 } 1693 1694 /* We need to figure out the alignment required for this symbol. I 1695 have no idea how ELF linkers handle this. */ 1696 power_of_two = bfd_log2 (h->size); 1697 if (power_of_two > 3) 1698 power_of_two = 3; 1699 1700 /* Apply the required alignment. */ 1701 s = htab->sdynbss; 1702 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); 1703 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) 1704 { 1705 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) 1706 return FALSE; 1707 } 1708 1709 /* Define the symbol as being at this point in the section. */ 1710 h->root.u.def.section = s; 1711 h->root.u.def.value = s->_raw_size; 1712 1713 /* Increment the section size to make room for the symbol. */ 1714 s->_raw_size += h->size; 1715 1716 return TRUE; 1717} 1718 1719/* Allocate space in .plt, .got and associated reloc sections for 1720 dynamic relocs. */ 1721 1722static bfd_boolean 1723allocate_dynrelocs (h, inf) 1724 struct elf_link_hash_entry *h; 1725 PTR inf; 1726{ 1727 struct bfd_link_info *info; 1728 struct elf_s390_link_hash_table *htab; 1729 struct elf_s390_link_hash_entry *eh; 1730 struct elf_s390_dyn_relocs *p; 1731 1732 if (h->root.type == bfd_link_hash_indirect) 1733 return TRUE; 1734 1735 if (h->root.type == bfd_link_hash_warning) 1736 /* When warning symbols are created, they **replace** the "real" 1737 entry in the hash table, thus we never get to see the real 1738 symbol in a hash traversal. So look at it now. */ 1739 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1740 1741 info = (struct bfd_link_info *) inf; 1742 htab = elf_s390_hash_table (info); 1743 1744 if (htab->elf.dynamic_sections_created 1745 && h->plt.refcount > 0 1746 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1747 || h->root.type != bfd_link_hash_undefweak)) 1748 { 1749 /* Make sure this symbol is output as a dynamic symbol. 1750 Undefined weak syms won't yet be marked as dynamic. */ 1751 if (h->dynindx == -1 1752 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) 1753 { 1754 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1755 return FALSE; 1756 } 1757 1758 if (info->shared 1759 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) 1760 { 1761 asection *s = htab->splt; 1762 1763 /* If this is the first .plt entry, make room for the special 1764 first entry. */ 1765 if (s->_raw_size == 0) 1766 s->_raw_size += PLT_FIRST_ENTRY_SIZE; 1767 1768 h->plt.offset = s->_raw_size; 1769 1770 /* If this symbol is not defined in a regular file, and we are 1771 not generating a shared library, then set the symbol to this 1772 location in the .plt. This is required to make function 1773 pointers compare as equal between the normal executable and 1774 the shared library. */ 1775 if (! info->shared 1776 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) 1777 { 1778 h->root.u.def.section = s; 1779 h->root.u.def.value = h->plt.offset; 1780 } 1781 1782 /* Make room for this entry. */ 1783 s->_raw_size += PLT_ENTRY_SIZE; 1784 1785 /* We also need to make an entry in the .got.plt section, which 1786 will be placed in the .got section by the linker script. */ 1787 htab->sgotplt->_raw_size += GOT_ENTRY_SIZE; 1788 1789 /* We also need to make an entry in the .rela.plt section. */ 1790 htab->srelplt->_raw_size += sizeof (Elf32_External_Rela); 1791 } 1792 else 1793 { 1794 h->plt.offset = (bfd_vma) -1; 1795 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; 1796 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1797 } 1798 } 1799 else 1800 { 1801 h->plt.offset = (bfd_vma) -1; 1802 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; 1803 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1804 } 1805 1806 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to 1807 the binary, we can optimize a bit. IE32 and GOTIE32 get converted 1808 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT 1809 we can save the dynamic TLS relocation. */ 1810 if (h->got.refcount > 0 1811 && !info->shared 1812 && h->dynindx == -1 1813 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) 1814 { 1815 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) 1816 /* For the GOTIE access without a literal pool entry the offset has 1817 to be stored somewhere. The immediate value in the instruction 1818 is not bit enough so the value is stored in the got. */ 1819 { 1820 h->got.offset = htab->sgot->_raw_size; 1821 htab->sgot->_raw_size += GOT_ENTRY_SIZE; 1822 } 1823 else 1824 h->got.offset = (bfd_vma) -1; 1825 } 1826 else if (h->got.refcount > 0) 1827 { 1828 asection *s; 1829 bfd_boolean dyn; 1830 int tls_type = elf_s390_hash_entry(h)->tls_type; 1831 1832 /* Make sure this symbol is output as a dynamic symbol. 1833 Undefined weak syms won't yet be marked as dynamic. */ 1834 if (h->dynindx == -1 1835 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) 1836 { 1837 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1838 return FALSE; 1839 } 1840 1841 s = htab->sgot; 1842 h->got.offset = s->_raw_size; 1843 s->_raw_size += GOT_ENTRY_SIZE; 1844 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */ 1845 if (tls_type == GOT_TLS_GD) 1846 s->_raw_size += GOT_ENTRY_SIZE; 1847 dyn = htab->elf.dynamic_sections_created; 1848 /* R_390_TLS_IE32 needs one dynamic relocation, 1849 R_390_TLS_GD32 needs one if local symbol and two if global. */ 1850 if ((tls_type == GOT_TLS_GD && h->dynindx == -1) 1851 || tls_type >= GOT_TLS_IE) 1852 htab->srelgot->_raw_size += sizeof (Elf32_External_Rela); 1853 else if (tls_type == GOT_TLS_GD) 1854 htab->srelgot->_raw_size += 2 * sizeof (Elf32_External_Rela); 1855 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1856 || h->root.type != bfd_link_hash_undefweak) 1857 && (info->shared 1858 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) 1859 htab->srelgot->_raw_size += sizeof (Elf32_External_Rela); 1860 } 1861 else 1862 h->got.offset = (bfd_vma) -1; 1863 1864 eh = (struct elf_s390_link_hash_entry *) h; 1865 if (eh->dyn_relocs == NULL) 1866 return TRUE; 1867 1868 /* In the shared -Bsymbolic case, discard space allocated for 1869 dynamic pc-relative relocs against symbols which turn out to be 1870 defined in regular objects. For the normal shared case, discard 1871 space for pc-relative relocs that have become local due to symbol 1872 visibility changes. */ 1873 1874 if (info->shared) 1875 { 1876 if (SYMBOL_REFERENCES_LOCAL (info, h)) 1877 { 1878 struct elf_s390_dyn_relocs **pp; 1879 1880 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 1881 { 1882 p->count -= p->pc_count; 1883 p->pc_count = 0; 1884 if (p->count == 0) 1885 *pp = p->next; 1886 else 1887 pp = &p->next; 1888 } 1889 } 1890 1891 /* Also discard relocs on undefined weak syms with non-default 1892 visibility. */ 1893 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 1894 && h->root.type == bfd_link_hash_undefweak) 1895 eh->dyn_relocs = NULL; 1896 } 1897 else if (ELIMINATE_COPY_RELOCS) 1898 { 1899 /* For the non-shared case, discard space for relocs against 1900 symbols which turn out to need copy relocs or are not 1901 dynamic. */ 1902 1903 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 1904 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 1905 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) 1906 || (htab->elf.dynamic_sections_created 1907 && (h->root.type == bfd_link_hash_undefweak 1908 || h->root.type == bfd_link_hash_undefined)))) 1909 { 1910 /* Make sure this symbol is output as a dynamic symbol. 1911 Undefined weak syms won't yet be marked as dynamic. */ 1912 if (h->dynindx == -1 1913 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) 1914 { 1915 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1916 return FALSE; 1917 } 1918 1919 /* If that succeeded, we know we'll be keeping all the 1920 relocs. */ 1921 if (h->dynindx != -1) 1922 goto keep; 1923 } 1924 1925 eh->dyn_relocs = NULL; 1926 1927 keep: ; 1928 } 1929 1930 /* Finally, allocate space. */ 1931 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1932 { 1933 asection *sreloc = elf_section_data (p->sec)->sreloc; 1934 1935 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela); 1936 } 1937 1938 return TRUE; 1939} 1940 1941/* Find any dynamic relocs that apply to read-only sections. */ 1942 1943static bfd_boolean 1944readonly_dynrelocs (h, inf) 1945 struct elf_link_hash_entry *h; 1946 PTR inf; 1947{ 1948 struct elf_s390_link_hash_entry *eh; 1949 struct elf_s390_dyn_relocs *p; 1950 1951 if (h->root.type == bfd_link_hash_warning) 1952 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1953 1954 eh = (struct elf_s390_link_hash_entry *) h; 1955 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1956 { 1957 asection *s = p->sec->output_section; 1958 1959 if (s != NULL && (s->flags & SEC_READONLY) != 0) 1960 { 1961 struct bfd_link_info *info = (struct bfd_link_info *) inf; 1962 1963 info->flags |= DF_TEXTREL; 1964 1965 /* Not an error, just cut short the traversal. */ 1966 return FALSE; 1967 } 1968 } 1969 return TRUE; 1970} 1971 1972/* Set the sizes of the dynamic sections. */ 1973 1974static bfd_boolean 1975elf_s390_size_dynamic_sections (output_bfd, info) 1976 bfd *output_bfd ATTRIBUTE_UNUSED; 1977 struct bfd_link_info *info; 1978{ 1979 struct elf_s390_link_hash_table *htab; 1980 bfd *dynobj; 1981 asection *s; 1982 bfd_boolean relocs; 1983 bfd *ibfd; 1984 1985 htab = elf_s390_hash_table (info); 1986 dynobj = htab->elf.dynobj; 1987 if (dynobj == NULL) 1988 abort (); 1989 1990 if (htab->elf.dynamic_sections_created) 1991 { 1992 /* Set the contents of the .interp section to the interpreter. */ 1993 if (info->executable) 1994 { 1995 s = bfd_get_section_by_name (dynobj, ".interp"); 1996 if (s == NULL) 1997 abort (); 1998 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; 1999 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 2000 } 2001 } 2002 2003 /* Set up .got offsets for local syms, and space for local dynamic 2004 relocs. */ 2005 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 2006 { 2007 bfd_signed_vma *local_got; 2008 bfd_signed_vma *end_local_got; 2009 char *local_tls_type; 2010 bfd_size_type locsymcount; 2011 Elf_Internal_Shdr *symtab_hdr; 2012 asection *srela; 2013 2014 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 2015 continue; 2016 2017 for (s = ibfd->sections; s != NULL; s = s->next) 2018 { 2019 struct elf_s390_dyn_relocs *p; 2020 2021 for (p = *((struct elf_s390_dyn_relocs **) 2022 &elf_section_data (s)->local_dynrel); 2023 p != NULL; 2024 p = p->next) 2025 { 2026 if (!bfd_is_abs_section (p->sec) 2027 && bfd_is_abs_section (p->sec->output_section)) 2028 { 2029 /* Input section has been discarded, either because 2030 it is a copy of a linkonce section or due to 2031 linker script /DISCARD/, so we'll be discarding 2032 the relocs too. */ 2033 } 2034 else if (p->count != 0) 2035 { 2036 srela = elf_section_data (p->sec)->sreloc; 2037 srela->_raw_size += p->count * sizeof (Elf32_External_Rela); 2038 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2039 info->flags |= DF_TEXTREL; 2040 } 2041 } 2042 } 2043 2044 local_got = elf_local_got_refcounts (ibfd); 2045 if (!local_got) 2046 continue; 2047 2048 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2049 locsymcount = symtab_hdr->sh_info; 2050 end_local_got = local_got + locsymcount; 2051 local_tls_type = elf_s390_local_got_tls_type (ibfd); 2052 s = htab->sgot; 2053 srela = htab->srelgot; 2054 for (; local_got < end_local_got; ++local_got, ++local_tls_type) 2055 { 2056 if (*local_got > 0) 2057 { 2058 *local_got = s->_raw_size; 2059 s->_raw_size += GOT_ENTRY_SIZE; 2060 if (*local_tls_type == GOT_TLS_GD) 2061 s->_raw_size += GOT_ENTRY_SIZE; 2062 if (info->shared) 2063 srela->_raw_size += sizeof (Elf32_External_Rela); 2064 } 2065 else 2066 *local_got = (bfd_vma) -1; 2067 } 2068 } 2069 2070 if (htab->tls_ldm_got.refcount > 0) 2071 { 2072 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32 2073 relocs. */ 2074 htab->tls_ldm_got.offset = htab->sgot->_raw_size; 2075 htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE; 2076 htab->srelgot->_raw_size += sizeof (Elf32_External_Rela); 2077 } 2078 else 2079 htab->tls_ldm_got.offset = -1; 2080 2081 /* Allocate global sym .plt and .got entries, and space for global 2082 sym dynamic relocs. */ 2083 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); 2084 2085 /* We now have determined the sizes of the various dynamic sections. 2086 Allocate memory for them. */ 2087 relocs = FALSE; 2088 for (s = dynobj->sections; s != NULL; s = s->next) 2089 { 2090 if ((s->flags & SEC_LINKER_CREATED) == 0) 2091 continue; 2092 2093 if (s == htab->splt 2094 || s == htab->sgot 2095 || s == htab->sgotplt) 2096 { 2097 /* Strip this section if we don't need it; see the 2098 comment below. */ 2099 } 2100 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) 2101 { 2102 if (s->_raw_size != 0) 2103 relocs = TRUE; 2104 2105 /* We use the reloc_count field as a counter if we need 2106 to copy relocs into the output file. */ 2107 s->reloc_count = 0; 2108 } 2109 else 2110 { 2111 /* It's not one of our sections, so don't allocate space. */ 2112 continue; 2113 } 2114 2115 if (s->_raw_size == 0) 2116 { 2117 /* If we don't need this section, strip it from the 2118 output file. This is to handle .rela.bss and 2119 .rela.plt. We must create it in 2120 create_dynamic_sections, because it must be created 2121 before the linker maps input sections to output 2122 sections. The linker does that before 2123 adjust_dynamic_symbol is called, and it is that 2124 function which decides whether anything needs to go 2125 into these sections. */ 2126 2127 _bfd_strip_section_from_output (info, s); 2128 continue; 2129 } 2130 2131 /* Allocate memory for the section contents. We use bfd_zalloc 2132 here in case unused entries are not reclaimed before the 2133 section's contents are written out. This should not happen, 2134 but this way if it does, we get a R_390_NONE reloc instead 2135 of garbage. */ 2136 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); 2137 if (s->contents == NULL) 2138 return FALSE; 2139 } 2140 2141 if (htab->elf.dynamic_sections_created) 2142 { 2143 /* Add some entries to the .dynamic section. We fill in the 2144 values later, in elf_s390_finish_dynamic_sections, but we 2145 must add the entries now so that we get the correct size for 2146 the .dynamic section. The DT_DEBUG entry is filled in by the 2147 dynamic linker and used by the debugger. */ 2148#define add_dynamic_entry(TAG, VAL) \ 2149 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2150 2151 if (info->executable) 2152 { 2153 if (!add_dynamic_entry (DT_DEBUG, 0)) 2154 return FALSE; 2155 } 2156 2157 if (htab->splt->_raw_size != 0) 2158 { 2159 if (!add_dynamic_entry (DT_PLTGOT, 0) 2160 || !add_dynamic_entry (DT_PLTRELSZ, 0) 2161 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 2162 || !add_dynamic_entry (DT_JMPREL, 0)) 2163 return FALSE; 2164 } 2165 2166 if (relocs) 2167 { 2168 if (!add_dynamic_entry (DT_RELA, 0) 2169 || !add_dynamic_entry (DT_RELASZ, 0) 2170 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 2171 return FALSE; 2172 2173 /* If any dynamic relocs apply to a read-only section, 2174 then we need a DT_TEXTREL entry. */ 2175 if ((info->flags & DF_TEXTREL) == 0) 2176 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, 2177 (PTR) info); 2178 2179 if ((info->flags & DF_TEXTREL) != 0) 2180 { 2181 if (!add_dynamic_entry (DT_TEXTREL, 0)) 2182 return FALSE; 2183 } 2184 } 2185 } 2186#undef add_dynamic_entry 2187 2188 return TRUE; 2189} 2190 2191/* Return the base VMA address which should be subtracted from real addresses 2192 when resolving @dtpoff relocation. 2193 This is PT_TLS segment p_vaddr. */ 2194 2195static bfd_vma 2196dtpoff_base (info) 2197 struct bfd_link_info *info; 2198{ 2199 /* If tls_sec is NULL, we should have signalled an error already. */ 2200 if (elf_hash_table (info)->tls_sec == NULL) 2201 return 0; 2202 return elf_hash_table (info)->tls_sec->vma; 2203} 2204 2205/* Return the relocation value for @tpoff relocation 2206 if STT_TLS virtual address is ADDRESS. */ 2207 2208static bfd_vma 2209tpoff (info, address) 2210 struct bfd_link_info *info; 2211 bfd_vma address; 2212{ 2213 struct elf_link_hash_table *htab = elf_hash_table (info); 2214 2215 /* If tls_sec is NULL, we should have signalled an error already. */ 2216 if (htab->tls_sec == NULL) 2217 return 0; 2218 return htab->tls_size + htab->tls_sec->vma - address; 2219} 2220 2221/* Complain if TLS instruction relocation is against an invalid 2222 instruction. */ 2223 2224static void 2225invalid_tls_insn (input_bfd, input_section, rel) 2226 bfd *input_bfd; 2227 asection *input_section; 2228 Elf_Internal_Rela *rel; 2229{ 2230 reloc_howto_type *howto; 2231 2232 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info); 2233 (*_bfd_error_handler) 2234 (_("%s(%s+0x%lx): invalid instruction for TLS relocation %s"), 2235 bfd_archive_filename (input_bfd), 2236 bfd_get_section_name (input_bfd, input_section), 2237 (long) rel->r_offset, 2238 howto->name); 2239} 2240 2241/* Relocate a 390 ELF section. */ 2242 2243static bfd_boolean 2244elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, 2245 contents, relocs, local_syms, local_sections) 2246 bfd *output_bfd; 2247 struct bfd_link_info *info; 2248 bfd *input_bfd; 2249 asection *input_section; 2250 bfd_byte *contents; 2251 Elf_Internal_Rela *relocs; 2252 Elf_Internal_Sym *local_syms; 2253 asection **local_sections; 2254{ 2255 struct elf_s390_link_hash_table *htab; 2256 Elf_Internal_Shdr *symtab_hdr; 2257 struct elf_link_hash_entry **sym_hashes; 2258 bfd_vma *local_got_offsets; 2259 Elf_Internal_Rela *rel; 2260 Elf_Internal_Rela *relend; 2261 2262 if (info->relocatable) 2263 return TRUE; 2264 2265 htab = elf_s390_hash_table (info); 2266 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 2267 sym_hashes = elf_sym_hashes (input_bfd); 2268 local_got_offsets = elf_local_got_offsets (input_bfd); 2269 2270 rel = relocs; 2271 relend = relocs + input_section->reloc_count; 2272 for (; rel < relend; rel++) 2273 { 2274 unsigned int r_type; 2275 reloc_howto_type *howto; 2276 unsigned long r_symndx; 2277 struct elf_link_hash_entry *h; 2278 Elf_Internal_Sym *sym; 2279 asection *sec; 2280 bfd_vma off; 2281 bfd_vma relocation; 2282 bfd_boolean unresolved_reloc; 2283 bfd_reloc_status_type r; 2284 int tls_type; 2285 2286 r_type = ELF32_R_TYPE (rel->r_info); 2287 if (r_type == (int) R_390_GNU_VTINHERIT 2288 || r_type == (int) R_390_GNU_VTENTRY) 2289 continue; 2290 if (r_type >= (int) R_390_max) 2291 { 2292 bfd_set_error (bfd_error_bad_value); 2293 return FALSE; 2294 } 2295 2296 howto = elf_howto_table + r_type; 2297 r_symndx = ELF32_R_SYM (rel->r_info); 2298 2299 /* This is a final link. */ 2300 h = NULL; 2301 sym = NULL; 2302 sec = NULL; 2303 unresolved_reloc = FALSE; 2304 if (r_symndx < symtab_hdr->sh_info) 2305 { 2306 sym = local_syms + r_symndx; 2307 sec = local_sections[r_symndx]; 2308 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2309 } 2310 else 2311 { 2312 bfd_boolean warned ATTRIBUTE_UNUSED; 2313 2314 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 2315 r_symndx, symtab_hdr, sym_hashes, 2316 h, sec, relocation, 2317 unresolved_reloc, warned); 2318 } 2319 2320 switch (r_type) 2321 { 2322 case R_390_GOTPLT12: 2323 case R_390_GOTPLT16: 2324 case R_390_GOTPLT20: 2325 case R_390_GOTPLT32: 2326 case R_390_GOTPLTENT: 2327 /* There are three cases for a GOTPLT relocation. 1) The 2328 relocation is against the jump slot entry of a plt that 2329 will get emitted to the output file. 2) The relocation 2330 is against the jump slot of a plt entry that has been 2331 removed. elf_s390_adjust_gotplt has created a GOT entry 2332 as replacement. 3) The relocation is against a local symbol. 2333 Cases 2) and 3) are the same as the GOT relocation code 2334 so we just have to test for case 1 and fall through for 2335 the other two. */ 2336 if (h != NULL && h->plt.offset != (bfd_vma) -1) 2337 { 2338 bfd_vma plt_index; 2339 2340 /* Calc. index no. 2341 Current offset - size first entry / entry size. */ 2342 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / 2343 PLT_ENTRY_SIZE; 2344 2345 /* Offset in GOT is PLT index plus GOT headers(3) times 4, 2346 addr & GOT addr. */ 2347 relocation = (plt_index + 3) * GOT_ENTRY_SIZE; 2348 unresolved_reloc = FALSE; 2349 2350 if (r_type == R_390_GOTPLTENT) 2351 relocation += htab->sgot->output_section->vma; 2352 break; 2353 } 2354 /* Fall through. */ 2355 2356 case R_390_GOT12: 2357 case R_390_GOT16: 2358 case R_390_GOT20: 2359 case R_390_GOT32: 2360 case R_390_GOTENT: 2361 /* Relocation is to the entry for this symbol in the global 2362 offset table. */ 2363 if (htab->sgot == NULL) 2364 abort (); 2365 2366 if (h != NULL) 2367 { 2368 bfd_boolean dyn; 2369 2370 off = h->got.offset; 2371 dyn = htab->elf.dynamic_sections_created; 2372 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 2373 || (info->shared 2374 && (info->symbolic 2375 || h->dynindx == -1 2376 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) 2377 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) 2378 || (ELF_ST_VISIBILITY (h->other) 2379 && h->root.type == bfd_link_hash_undefweak)) 2380 { 2381 /* This is actually a static link, or it is a 2382 -Bsymbolic link and the symbol is defined 2383 locally, or the symbol was forced to be local 2384 because of a version file. We must initialize 2385 this entry in the global offset table. Since the 2386 offset must always be a multiple of 2, we use the 2387 least significant bit to record whether we have 2388 initialized it already. 2389 2390 When doing a dynamic link, we create a .rel.got 2391 relocation entry to initialize the value. This 2392 is done in the finish_dynamic_symbol routine. */ 2393 if ((off & 1) != 0) 2394 off &= ~1; 2395 else 2396 { 2397 bfd_put_32 (output_bfd, relocation, 2398 htab->sgot->contents + off); 2399 h->got.offset |= 1; 2400 } 2401 } 2402 else 2403 unresolved_reloc = FALSE; 2404 } 2405 else 2406 { 2407 if (local_got_offsets == NULL) 2408 abort (); 2409 2410 off = local_got_offsets[r_symndx]; 2411 2412 /* The offset must always be a multiple of 4. We use 2413 the least significant bit to record whether we have 2414 already generated the necessary reloc. */ 2415 if ((off & 1) != 0) 2416 off &= ~1; 2417 else 2418 { 2419 bfd_put_32 (output_bfd, relocation, 2420 htab->sgot->contents + off); 2421 2422 if (info->shared) 2423 { 2424 asection *srelgot; 2425 Elf_Internal_Rela outrel; 2426 bfd_byte *loc; 2427 2428 srelgot = htab->srelgot; 2429 if (srelgot == NULL) 2430 abort (); 2431 2432 outrel.r_offset = (htab->sgot->output_section->vma 2433 + htab->sgot->output_offset 2434 + off); 2435 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 2436 outrel.r_addend = relocation; 2437 loc = srelgot->contents; 2438 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 2439 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2440 } 2441 2442 local_got_offsets[r_symndx] |= 1; 2443 } 2444 } 2445 2446 if (off >= (bfd_vma) -2) 2447 abort (); 2448 2449 relocation = htab->sgot->output_offset + off; 2450 2451 /* For @GOTENT the relocation is against the offset between 2452 the instruction and the symbols entry in the GOT and not 2453 between the start of the GOT and the symbols entry. We 2454 add the vma of the GOT to get the correct value. */ 2455 if ( r_type == R_390_GOTENT 2456 || r_type == R_390_GOTPLTENT) 2457 relocation += htab->sgot->output_section->vma; 2458 2459 break; 2460 2461 case R_390_GOTOFF16: 2462 case R_390_GOTOFF32: 2463 /* Relocation is relative to the start of the global offset 2464 table. */ 2465 2466 /* Note that sgot->output_offset is not involved in this 2467 calculation. We always want the start of .got. If we 2468 defined _GLOBAL_OFFSET_TABLE in a different way, as is 2469 permitted by the ABI, we might have to change this 2470 calculation. */ 2471 relocation -= htab->sgot->output_section->vma; 2472 break; 2473 2474 case R_390_GOTPC: 2475 case R_390_GOTPCDBL: 2476 /* Use global offset table as symbol value. */ 2477 relocation = htab->sgot->output_section->vma; 2478 unresolved_reloc = FALSE; 2479 break; 2480 2481 case R_390_PLT16DBL: 2482 case R_390_PLT32DBL: 2483 case R_390_PLT32: 2484 /* Relocation is to the entry for this symbol in the 2485 procedure linkage table. */ 2486 2487 /* Resolve a PLT32 reloc against a local symbol directly, 2488 without using the procedure linkage table. */ 2489 if (h == NULL) 2490 break; 2491 2492 if (h->plt.offset == (bfd_vma) -1 2493 || htab->splt == NULL) 2494 { 2495 /* We didn't make a PLT entry for this symbol. This 2496 happens when statically linking PIC code, or when 2497 using -Bsymbolic. */ 2498 break; 2499 } 2500 2501 relocation = (htab->splt->output_section->vma 2502 + htab->splt->output_offset 2503 + h->plt.offset); 2504 unresolved_reloc = FALSE; 2505 break; 2506 2507 case R_390_PLTOFF16: 2508 case R_390_PLTOFF32: 2509 /* Relocation is to the entry for this symbol in the 2510 procedure linkage table relative to the start of the GOT. */ 2511 2512 /* For local symbols or if we didn't make a PLT entry for 2513 this symbol resolve the symbol directly. */ 2514 if ( h == NULL 2515 || h->plt.offset == (bfd_vma) -1 2516 || htab->splt == NULL) 2517 { 2518 relocation -= htab->sgot->output_section->vma; 2519 break; 2520 } 2521 2522 relocation = (htab->splt->output_section->vma 2523 + htab->splt->output_offset 2524 + h->plt.offset 2525 - htab->sgot->output_section->vma); 2526 unresolved_reloc = FALSE; 2527 break; 2528 2529 case R_390_8: 2530 case R_390_16: 2531 case R_390_32: 2532 case R_390_PC16: 2533 case R_390_PC16DBL: 2534 case R_390_PC32DBL: 2535 case R_390_PC32: 2536 /* r_symndx will be zero only for relocs against symbols 2537 from removed linkonce sections, or sections discarded by 2538 a linker script. */ 2539 if (r_symndx == 0 2540 || (input_section->flags & SEC_ALLOC) == 0) 2541 break; 2542 2543 if ((info->shared 2544 && (h == NULL 2545 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 2546 || h->root.type != bfd_link_hash_undefweak) 2547 && ((r_type != R_390_PC16 2548 && r_type != R_390_PC16DBL 2549 && r_type != R_390_PC32DBL 2550 && r_type != R_390_PC32) 2551 || (h != NULL 2552 && !SYMBOL_REFERENCES_LOCAL (info, h)))) 2553 || (ELIMINATE_COPY_RELOCS 2554 && !info->shared 2555 && h != NULL 2556 && h->dynindx != -1 2557 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 2558 && (((h->elf_link_hash_flags 2559 & ELF_LINK_HASH_DEF_DYNAMIC) != 0 2560 && (h->elf_link_hash_flags 2561 & ELF_LINK_HASH_DEF_REGULAR) == 0) 2562 || h->root.type == bfd_link_hash_undefweak 2563 || h->root.type == bfd_link_hash_undefined))) 2564 { 2565 Elf_Internal_Rela outrel; 2566 bfd_boolean skip, relocate; 2567 asection *sreloc; 2568 bfd_byte *loc; 2569 2570 /* When generating a shared object, these relocations 2571 are copied into the output file to be resolved at run 2572 time. */ 2573 2574 skip = FALSE; 2575 relocate = FALSE; 2576 2577 outrel.r_offset = 2578 _bfd_elf_section_offset (output_bfd, info, input_section, 2579 rel->r_offset); 2580 if (outrel.r_offset == (bfd_vma) -1) 2581 skip = TRUE; 2582 else if (outrel.r_offset == (bfd_vma) -2) 2583 skip = TRUE, relocate = TRUE; 2584 outrel.r_offset += (input_section->output_section->vma 2585 + input_section->output_offset); 2586 2587 if (skip) 2588 memset (&outrel, 0, sizeof outrel); 2589 else if (h != NULL 2590 && h->dynindx != -1 2591 && (r_type == R_390_PC16 2592 || r_type == R_390_PC16DBL 2593 || r_type == R_390_PC32DBL 2594 || r_type == R_390_PC32 2595 || !info->shared 2596 || !info->symbolic 2597 || (h->elf_link_hash_flags 2598 & ELF_LINK_HASH_DEF_REGULAR) == 0)) 2599 { 2600 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 2601 outrel.r_addend = rel->r_addend; 2602 } 2603 else 2604 { 2605 /* This symbol is local, or marked to become local. */ 2606 outrel.r_addend = relocation + rel->r_addend; 2607 if (r_type == R_390_32) 2608 { 2609 relocate = TRUE; 2610 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 2611 } 2612 else 2613 { 2614 long sindx; 2615 2616 if (bfd_is_abs_section (sec)) 2617 sindx = 0; 2618 else if (sec == NULL || sec->owner == NULL) 2619 { 2620 bfd_set_error(bfd_error_bad_value); 2621 return FALSE; 2622 } 2623 else 2624 { 2625 asection *osec; 2626 2627 osec = sec->output_section; 2628 sindx = elf_section_data (osec)->dynindx; 2629 BFD_ASSERT (sindx > 0); 2630 2631 /* We are turning this relocation into one 2632 against a section symbol, so subtract out 2633 the output section's address but not the 2634 offset of the input section in the output 2635 section. */ 2636 2637 outrel.r_addend -= osec->vma; 2638 } 2639 outrel.r_info = ELF32_R_INFO (sindx, r_type); 2640 } 2641 } 2642 2643 sreloc = elf_section_data (input_section)->sreloc; 2644 if (sreloc == NULL) 2645 abort (); 2646 2647 loc = sreloc->contents; 2648 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 2649 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2650 2651 /* If this reloc is against an external symbol, we do 2652 not want to fiddle with the addend. Otherwise, we 2653 need to include the symbol value so that it becomes 2654 an addend for the dynamic reloc. */ 2655 if (! relocate) 2656 continue; 2657 } 2658 break; 2659 2660 /* Relocations for tls literal pool entries. */ 2661 case R_390_TLS_IE32: 2662 if (info->shared) 2663 { 2664 Elf_Internal_Rela outrel; 2665 asection *sreloc; 2666 bfd_byte *loc; 2667 2668 outrel.r_offset = rel->r_offset 2669 + input_section->output_section->vma 2670 + input_section->output_offset; 2671 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 2672 sreloc = elf_section_data (input_section)->sreloc; 2673 if (sreloc == NULL) 2674 abort (); 2675 loc = sreloc->contents; 2676 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 2677 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); 2678 } 2679 /* Fall through. */ 2680 2681 case R_390_TLS_GD32: 2682 case R_390_TLS_GOTIE32: 2683 r_type = elf_s390_tls_transition (info, r_type, h == NULL); 2684 tls_type = GOT_UNKNOWN; 2685 if (h == NULL && local_got_offsets) 2686 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 2687 else if (h != NULL) 2688 { 2689 tls_type = elf_s390_hash_entry(h)->tls_type; 2690 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) 2691 r_type = R_390_TLS_LE32; 2692 } 2693 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE) 2694 r_type = R_390_TLS_IE32; 2695 2696 if (r_type == R_390_TLS_LE32) 2697 { 2698 /* This relocation gets optimized away by the local exec 2699 access optimization. */ 2700 BFD_ASSERT (! unresolved_reloc); 2701 bfd_put_32 (output_bfd, -tpoff (info, relocation), 2702 contents + rel->r_offset); 2703 continue; 2704 } 2705 2706 if (htab->sgot == NULL) 2707 abort (); 2708 2709 if (h != NULL) 2710 off = h->got.offset; 2711 else 2712 { 2713 if (local_got_offsets == NULL) 2714 abort (); 2715 2716 off = local_got_offsets[r_symndx]; 2717 } 2718 2719 emit_tls_relocs: 2720 2721 if ((off & 1) != 0) 2722 off &= ~1; 2723 else 2724 { 2725 Elf_Internal_Rela outrel; 2726 bfd_byte *loc; 2727 int dr_type, indx; 2728 2729 if (htab->srelgot == NULL) 2730 abort (); 2731 2732 outrel.r_offset = (htab->sgot->output_section->vma 2733 + htab->sgot->output_offset + off); 2734 2735 indx = h && h->dynindx != -1 ? h->dynindx : 0; 2736 if (r_type == R_390_TLS_GD32) 2737 dr_type = R_390_TLS_DTPMOD; 2738 else 2739 dr_type = R_390_TLS_TPOFF; 2740 if (dr_type == R_390_TLS_TPOFF && indx == 0) 2741 outrel.r_addend = relocation - dtpoff_base (info); 2742 else 2743 outrel.r_addend = 0; 2744 outrel.r_info = ELF32_R_INFO (indx, dr_type); 2745 loc = htab->srelgot->contents; 2746 loc += htab->srelgot->reloc_count++ 2747 * sizeof (Elf32_External_Rela); 2748 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2749 2750 if (r_type == R_390_TLS_GD32) 2751 { 2752 if (indx == 0) 2753 { 2754 BFD_ASSERT (! unresolved_reloc); 2755 bfd_put_32 (output_bfd, 2756 relocation - dtpoff_base (info), 2757 htab->sgot->contents + off + GOT_ENTRY_SIZE); 2758 } 2759 else 2760 { 2761 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF); 2762 outrel.r_offset += GOT_ENTRY_SIZE; 2763 outrel.r_addend = 0; 2764 htab->srelgot->reloc_count++; 2765 loc += sizeof (Elf32_External_Rela); 2766 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2767 } 2768 } 2769 2770 if (h != NULL) 2771 h->got.offset |= 1; 2772 else 2773 local_got_offsets[r_symndx] |= 1; 2774 } 2775 2776 if (off >= (bfd_vma) -2) 2777 abort (); 2778 if (r_type == ELF32_R_TYPE (rel->r_info)) 2779 { 2780 relocation = htab->sgot->output_offset + off; 2781 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT) 2782 relocation += htab->sgot->output_section->vma; 2783 unresolved_reloc = FALSE; 2784 } 2785 else 2786 { 2787 bfd_put_32 (output_bfd, htab->sgot->output_offset + off, 2788 contents + rel->r_offset); 2789 continue; 2790 } 2791 break; 2792 2793 case R_390_TLS_GOTIE12: 2794 case R_390_TLS_GOTIE20: 2795 case R_390_TLS_IEENT: 2796 if (h == NULL) 2797 { 2798 if (local_got_offsets == NULL) 2799 abort(); 2800 off = local_got_offsets[r_symndx]; 2801 if (info->shared) 2802 goto emit_tls_relocs; 2803 } 2804 else 2805 { 2806 off = h->got.offset; 2807 tls_type = elf_s390_hash_entry(h)->tls_type; 2808 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) 2809 goto emit_tls_relocs; 2810 } 2811 2812 if (htab->sgot == NULL) 2813 abort (); 2814 2815 BFD_ASSERT (! unresolved_reloc); 2816 bfd_put_32 (output_bfd, -tpoff (info, relocation), 2817 htab->sgot->contents + off); 2818 relocation = htab->sgot->output_offset + off; 2819 if (r_type == R_390_TLS_IEENT) 2820 relocation += htab->sgot->output_section->vma; 2821 unresolved_reloc = FALSE; 2822 break; 2823 2824 case R_390_TLS_LDM32: 2825 if (! info->shared) 2826 /* The literal pool entry this relocation refers to gets ignored 2827 by the optimized code of the local exec model. Do nothing 2828 and the value will turn out zero. */ 2829 continue; 2830 2831 if (htab->sgot == NULL) 2832 abort (); 2833 2834 off = htab->tls_ldm_got.offset; 2835 if (off & 1) 2836 off &= ~1; 2837 else 2838 { 2839 Elf_Internal_Rela outrel; 2840 bfd_byte *loc; 2841 2842 if (htab->srelgot == NULL) 2843 abort (); 2844 2845 outrel.r_offset = (htab->sgot->output_section->vma 2846 + htab->sgot->output_offset + off); 2847 2848 bfd_put_32 (output_bfd, 0, 2849 htab->sgot->contents + off + GOT_ENTRY_SIZE); 2850 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD); 2851 outrel.r_addend = 0; 2852 loc = htab->srelgot->contents; 2853 loc += htab->srelgot->reloc_count++ 2854 * sizeof (Elf32_External_Rela); 2855 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2856 htab->tls_ldm_got.offset |= 1; 2857 } 2858 relocation = htab->sgot->output_offset + off; 2859 unresolved_reloc = FALSE; 2860 break; 2861 2862 case R_390_TLS_LE32: 2863 if (info->shared) 2864 { 2865 /* Linking a shared library with non-fpic code requires 2866 a R_390_TLS_TPOFF relocation. */ 2867 Elf_Internal_Rela outrel; 2868 asection *sreloc; 2869 bfd_byte *loc; 2870 int indx; 2871 2872 outrel.r_offset = rel->r_offset 2873 + input_section->output_section->vma 2874 + input_section->output_offset; 2875 if (h != NULL && h->dynindx != -1) 2876 indx = h->dynindx; 2877 else 2878 indx = 0; 2879 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF); 2880 if (indx == 0) 2881 outrel.r_addend = relocation - dtpoff_base (info); 2882 else 2883 outrel.r_addend = 0; 2884 sreloc = elf_section_data (input_section)->sreloc; 2885 if (sreloc == NULL) 2886 abort (); 2887 loc = sreloc->contents; 2888 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 2889 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2890 } 2891 else 2892 { 2893 BFD_ASSERT (! unresolved_reloc); 2894 bfd_put_32 (output_bfd, -tpoff (info, relocation), 2895 contents + rel->r_offset); 2896 } 2897 continue; 2898 2899 case R_390_TLS_LDO32: 2900 if (info->shared || (input_section->flags & SEC_CODE) == 0) 2901 relocation -= dtpoff_base (info); 2902 else 2903 /* When converting LDO to LE, we must negate. */ 2904 relocation = -tpoff (info, relocation); 2905 break; 2906 2907 /* Relocations for tls instructions. */ 2908 case R_390_TLS_LOAD: 2909 case R_390_TLS_GDCALL: 2910 case R_390_TLS_LDCALL: 2911 tls_type = GOT_UNKNOWN; 2912 if (h == NULL && local_got_offsets) 2913 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 2914 else if (h != NULL) 2915 tls_type = elf_s390_hash_entry(h)->tls_type; 2916 2917 if (tls_type == GOT_TLS_GD) 2918 continue; 2919 2920 if (r_type == R_390_TLS_LOAD) 2921 { 2922 if (!info->shared && (h == NULL || h->dynindx == -1)) 2923 { 2924 /* IE->LE transition. Four valid cases: 2925 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 2926 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 2927 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 2928 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ 2929 unsigned int insn, ry; 2930 2931 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 2932 ry = 0; 2933 if ((insn & 0xff00f000) == 0x58000000) 2934 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */ 2935 ry = (insn & 0x000f0000); 2936 else if ((insn & 0xff0f0000) == 0x58000000) 2937 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */ 2938 ry = (insn & 0x0000f000) << 4; 2939 else if ((insn & 0xff00f000) == 0x5800c000) 2940 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */ 2941 ry = (insn & 0x000f0000); 2942 else if ((insn & 0xff0f0000) == 0x580c0000) 2943 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ 2944 ry = (insn & 0x0000f000) << 4; 2945 else 2946 invalid_tls_insn (input_bfd, input_section, rel); 2947 insn = 0x18000700 | (insn & 0x00f00000) | ry; 2948 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 2949 } 2950 } 2951 else if (r_type == R_390_TLS_GDCALL) 2952 { 2953 unsigned int insn; 2954 2955 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 2956 if ((insn & 0xff000fff) != 0x4d000000) 2957 invalid_tls_insn (input_bfd, input_section, rel); 2958 if (!info->shared && (h == NULL || h->dynindx == -1)) 2959 /* GD->LE transition. 2960 bas %r14,0(%rx,%r13) -> bc 0,0 */ 2961 insn = 0x47000000; 2962 else 2963 /* GD->IE transition. 2964 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */ 2965 insn = 0x5822c000; 2966 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 2967 } 2968 else if (r_type == R_390_TLS_LDCALL) 2969 { 2970 if (!info->shared) 2971 { 2972 unsigned int insn; 2973 2974 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 2975 if ((insn & 0xff000fff) != 0x4d000000) 2976 invalid_tls_insn (input_bfd, input_section, rel); 2977 /* LD->LE transition. 2978 bas %r14,0(%rx,%r13) -> bc 0,0 */ 2979 insn = 0x47000000; 2980 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 2981 } 2982 } 2983 continue; 2984 2985 default: 2986 break; 2987 } 2988 2989 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections 2990 because such sections are not SEC_ALLOC and thus ld.so will 2991 not process them. */ 2992 if (unresolved_reloc 2993 && !((input_section->flags & SEC_DEBUGGING) != 0 2994 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) 2995 (*_bfd_error_handler) 2996 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), 2997 bfd_archive_filename (input_bfd), 2998 bfd_get_section_name (input_bfd, input_section), 2999 (long) rel->r_offset, 3000 h->root.root.string); 3001 3002 if (r_type == R_390_20 3003 || r_type == R_390_GOT20 3004 || r_type == R_390_GOTPLT20 3005 || r_type == R_390_TLS_GOTIE20) 3006 { 3007 relocation += rel->r_addend; 3008 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; 3009 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3010 contents, rel->r_offset, 3011 relocation, 0); 3012 } 3013 else 3014 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3015 contents, rel->r_offset, 3016 relocation, rel->r_addend); 3017 3018 if (r != bfd_reloc_ok) 3019 { 3020 const char *name; 3021 3022 if (h != NULL) 3023 name = h->root.root.string; 3024 else 3025 { 3026 name = bfd_elf_string_from_elf_section (input_bfd, 3027 symtab_hdr->sh_link, 3028 sym->st_name); 3029 if (name == NULL) 3030 return FALSE; 3031 if (*name == '\0') 3032 name = bfd_section_name (input_bfd, sec); 3033 } 3034 3035 if (r == bfd_reloc_overflow) 3036 { 3037 3038 if (! ((*info->callbacks->reloc_overflow) 3039 (info, name, howto->name, (bfd_vma) 0, 3040 input_bfd, input_section, rel->r_offset))) 3041 return FALSE; 3042 } 3043 else 3044 { 3045 (*_bfd_error_handler) 3046 (_("%s(%s+0x%lx): reloc against `%s': error %d"), 3047 bfd_archive_filename (input_bfd), 3048 bfd_get_section_name (input_bfd, input_section), 3049 (long) rel->r_offset, name, (int) r); 3050 return FALSE; 3051 } 3052 } 3053 } 3054 3055 return TRUE; 3056} 3057 3058/* Finish up dynamic symbol handling. We set the contents of various 3059 dynamic sections here. */ 3060 3061static bfd_boolean 3062elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) 3063 bfd *output_bfd; 3064 struct bfd_link_info *info; 3065 struct elf_link_hash_entry *h; 3066 Elf_Internal_Sym *sym; 3067{ 3068 struct elf_s390_link_hash_table *htab; 3069 3070 htab = elf_s390_hash_table (info); 3071 3072 if (h->plt.offset != (bfd_vma) -1) 3073 { 3074 bfd_vma plt_index; 3075 bfd_vma got_offset; 3076 Elf_Internal_Rela rela; 3077 bfd_byte *loc; 3078 bfd_vma relative_offset; 3079 3080 /* This symbol has an entry in the procedure linkage table. Set 3081 it up. */ 3082 if (h->dynindx == -1 3083 || htab->splt == NULL 3084 || htab->sgotplt == NULL 3085 || htab->srelplt == NULL) 3086 abort (); 3087 3088 /* Calc. index no. 3089 Current offset - size first entry / entry size. */ 3090 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; 3091 3092 /* Offset in GOT is PLT index plus GOT headers(3) times 4, 3093 addr & GOT addr. */ 3094 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; 3095 3096 /* S390 uses halfwords for relative branch calc! */ 3097 relative_offset = - ((PLT_FIRST_ENTRY_SIZE + 3098 (PLT_ENTRY_SIZE * plt_index) + 18) / 2); 3099 /* If offset is > 32768, branch to a previous branch 3100 390 can only handle +-64 K jumps. */ 3101 if ( -32768 > (int) relative_offset ) 3102 relative_offset 3103 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2); 3104 3105 /* Fill in the entry in the procedure linkage table. */ 3106 if (!info->shared) 3107 { 3108 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0, 3109 htab->splt->contents + h->plt.offset); 3110 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1, 3111 htab->splt->contents + h->plt.offset + 4); 3112 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2, 3113 htab->splt->contents + h->plt.offset + 8); 3114 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3, 3115 htab->splt->contents + h->plt.offset + 12); 3116 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4, 3117 htab->splt->contents + h->plt.offset + 16); 3118 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3119 htab->splt->contents + h->plt.offset + 20); 3120 bfd_put_32 (output_bfd, 3121 (htab->sgotplt->output_section->vma 3122 + htab->sgotplt->output_offset 3123 + got_offset), 3124 htab->splt->contents + h->plt.offset + 24); 3125 } 3126 else if (got_offset < 4096) 3127 { 3128 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset, 3129 htab->splt->contents + h->plt.offset); 3130 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1, 3131 htab->splt->contents + h->plt.offset + 4); 3132 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2, 3133 htab->splt->contents + h->plt.offset + 8); 3134 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3, 3135 htab->splt->contents + h->plt.offset + 12); 3136 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4, 3137 htab->splt->contents + h->plt.offset + 16); 3138 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3139 htab->splt->contents + h->plt.offset + 20); 3140 bfd_put_32 (output_bfd, (bfd_vma) 0, 3141 htab->splt->contents + h->plt.offset + 24); 3142 } 3143 else if (got_offset < 32768) 3144 { 3145 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset, 3146 htab->splt->contents + h->plt.offset); 3147 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1, 3148 htab->splt->contents + h->plt.offset + 4); 3149 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2, 3150 htab->splt->contents + h->plt.offset + 8); 3151 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3, 3152 htab->splt->contents + h->plt.offset + 12); 3153 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4, 3154 htab->splt->contents + h->plt.offset + 16); 3155 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3156 htab->splt->contents + h->plt.offset + 20); 3157 bfd_put_32 (output_bfd, (bfd_vma) 0, 3158 htab->splt->contents + h->plt.offset + 24); 3159 } 3160 else 3161 { 3162 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0, 3163 htab->splt->contents + h->plt.offset); 3164 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1, 3165 htab->splt->contents + h->plt.offset + 4); 3166 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2, 3167 htab->splt->contents + h->plt.offset + 8); 3168 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3, 3169 htab->splt->contents + h->plt.offset + 12); 3170 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4, 3171 htab->splt->contents + h->plt.offset + 16); 3172 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3173 htab->splt->contents + h->plt.offset + 20); 3174 bfd_put_32 (output_bfd, got_offset, 3175 htab->splt->contents + h->plt.offset + 24); 3176 } 3177 /* Insert offset into reloc. table here. */ 3178 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), 3179 htab->splt->contents + h->plt.offset + 28); 3180 3181 /* Fill in the entry in the global offset table. 3182 Points to instruction after GOT offset. */ 3183 bfd_put_32 (output_bfd, 3184 (htab->splt->output_section->vma 3185 + htab->splt->output_offset 3186 + h->plt.offset 3187 + 12), 3188 htab->sgotplt->contents + got_offset); 3189 3190 /* Fill in the entry in the .rela.plt section. */ 3191 rela.r_offset = (htab->sgotplt->output_section->vma 3192 + htab->sgotplt->output_offset 3193 + got_offset); 3194 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT); 3195 rela.r_addend = 0; 3196 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela); 3197 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3198 3199 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) 3200 { 3201 /* Mark the symbol as undefined, rather than as defined in 3202 the .plt section. Leave the value alone. This is a clue 3203 for the dynamic linker, to make function pointer 3204 comparisons work between an application and shared 3205 library. */ 3206 sym->st_shndx = SHN_UNDEF; 3207 } 3208 } 3209 3210 if (h->got.offset != (bfd_vma) -1 3211 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD 3212 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE 3213 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) 3214 { 3215 Elf_Internal_Rela rela; 3216 bfd_byte *loc; 3217 3218 /* This symbol has an entry in the global offset table. Set it 3219 up. */ 3220 3221 if (htab->sgot == NULL || htab->srelgot == NULL) 3222 abort (); 3223 3224 rela.r_offset = (htab->sgot->output_section->vma 3225 + htab->sgot->output_offset 3226 + (h->got.offset &~ (bfd_vma) 1)); 3227 3228 /* If this is a static link, or it is a -Bsymbolic link and the 3229 symbol is defined locally or was forced to be local because 3230 of a version file, we just want to emit a RELATIVE reloc. 3231 The entry in the global offset table will already have been 3232 initialized in the relocate_section function. */ 3233 if (info->shared 3234 && (info->symbolic 3235 || h->dynindx == -1 3236 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) 3237 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) 3238 { 3239 BFD_ASSERT((h->got.offset & 1) != 0); 3240 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 3241 rela.r_addend = (h->root.u.def.value 3242 + h->root.u.def.section->output_section->vma 3243 + h->root.u.def.section->output_offset); 3244 } 3245 else 3246 { 3247 BFD_ASSERT((h->got.offset & 1) == 0); 3248 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset); 3249 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT); 3250 rela.r_addend = 0; 3251 } 3252 3253 loc = htab->srelgot->contents; 3254 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 3255 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3256 } 3257 3258 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) 3259 { 3260 Elf_Internal_Rela rela; 3261 bfd_byte *loc; 3262 3263 /* This symbols needs a copy reloc. Set it up. */ 3264 3265 if (h->dynindx == -1 3266 || (h->root.type != bfd_link_hash_defined 3267 && h->root.type != bfd_link_hash_defweak) 3268 || htab->srelbss == NULL) 3269 abort (); 3270 3271 rela.r_offset = (h->root.u.def.value 3272 + h->root.u.def.section->output_section->vma 3273 + h->root.u.def.section->output_offset); 3274 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY); 3275 rela.r_addend = 0; 3276 loc = htab->srelbss->contents; 3277 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela); 3278 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3279 } 3280 3281 /* Mark some specially defined symbols as absolute. */ 3282 if (strcmp (h->root.root.string, "_DYNAMIC") == 0 3283 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 3284 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) 3285 sym->st_shndx = SHN_ABS; 3286 3287 return TRUE; 3288} 3289 3290/* Used to decide how to sort relocs in an optimal manner for the 3291 dynamic linker, before writing them out. */ 3292 3293static enum elf_reloc_type_class 3294elf_s390_reloc_type_class (rela) 3295 const Elf_Internal_Rela *rela; 3296{ 3297 switch ((int) ELF32_R_TYPE (rela->r_info)) 3298 { 3299 case R_390_RELATIVE: 3300 return reloc_class_relative; 3301 case R_390_JMP_SLOT: 3302 return reloc_class_plt; 3303 case R_390_COPY: 3304 return reloc_class_copy; 3305 default: 3306 return reloc_class_normal; 3307 } 3308} 3309 3310/* Finish up the dynamic sections. */ 3311 3312static bfd_boolean 3313elf_s390_finish_dynamic_sections (output_bfd, info) 3314 bfd *output_bfd; 3315 struct bfd_link_info *info; 3316{ 3317 struct elf_s390_link_hash_table *htab; 3318 bfd *dynobj; 3319 asection *sdyn; 3320 3321 htab = elf_s390_hash_table (info); 3322 dynobj = htab->elf.dynobj; 3323 sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); 3324 3325 if (htab->elf.dynamic_sections_created) 3326 { 3327 Elf32_External_Dyn *dyncon, *dynconend; 3328 3329 if (sdyn == NULL || htab->sgot == NULL) 3330 abort (); 3331 3332 dyncon = (Elf32_External_Dyn *) sdyn->contents; 3333 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); 3334 for (; dyncon < dynconend; dyncon++) 3335 { 3336 Elf_Internal_Dyn dyn; 3337 asection *s; 3338 3339 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 3340 3341 switch (dyn.d_tag) 3342 { 3343 default: 3344 continue; 3345 3346 case DT_PLTGOT: 3347 dyn.d_un.d_ptr = htab->sgot->output_section->vma; 3348 break; 3349 3350 case DT_JMPREL: 3351 dyn.d_un.d_ptr = htab->srelplt->output_section->vma; 3352 break; 3353 3354 case DT_PLTRELSZ: 3355 s = htab->srelplt->output_section; 3356 if (s->_cooked_size != 0) 3357 dyn.d_un.d_val = s->_cooked_size; 3358 else 3359 dyn.d_un.d_val = s->_raw_size; 3360 break; 3361 } 3362 3363 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3364 } 3365 3366 /* Fill in the special first entry in the procedure linkage table. */ 3367 if (htab->splt && htab->splt->_raw_size > 0) 3368 { 3369 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE); 3370 if (info->shared) 3371 { 3372 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0, 3373 htab->splt->contents ); 3374 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1, 3375 htab->splt->contents +4 ); 3376 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2, 3377 htab->splt->contents +8 ); 3378 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3, 3379 htab->splt->contents +12 ); 3380 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4, 3381 htab->splt->contents +16 ); 3382 } 3383 else 3384 { 3385 bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0, 3386 htab->splt->contents ); 3387 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1, 3388 htab->splt->contents +4 ); 3389 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2, 3390 htab->splt->contents +8 ); 3391 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3, 3392 htab->splt->contents +12 ); 3393 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4, 3394 htab->splt->contents +16 ); 3395 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5, 3396 htab->splt->contents +20 ); 3397 bfd_put_32 (output_bfd, 3398 htab->sgotplt->output_section->vma 3399 + htab->sgotplt->output_offset, 3400 htab->splt->contents + 24); 3401 } 3402 elf_section_data (htab->splt->output_section) 3403 ->this_hdr.sh_entsize = 4; 3404 } 3405 3406 } 3407 3408 if (htab->sgotplt) 3409 { 3410 /* Fill in the first three entries in the global offset table. */ 3411 if (htab->sgotplt->_raw_size > 0) 3412 { 3413 bfd_put_32 (output_bfd, 3414 (sdyn == NULL ? (bfd_vma) 0 3415 : sdyn->output_section->vma + sdyn->output_offset), 3416 htab->sgotplt->contents); 3417 /* One entry for shared object struct ptr. */ 3418 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4); 3419 /* One entry for _dl_runtime_resolve. */ 3420 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); 3421 } 3422 3423 elf_section_data (htab->sgotplt->output_section) 3424 ->this_hdr.sh_entsize = 4; 3425 } 3426 return TRUE; 3427} 3428 3429static bfd_boolean 3430elf_s390_grok_prstatus (abfd, note) 3431 bfd * abfd; 3432 Elf_Internal_Note * note; 3433{ 3434 int offset; 3435 unsigned int raw_size; 3436 3437 switch (note->descsz) 3438 { 3439 default: 3440 return FALSE; 3441 3442 case 224: /* S/390 Linux. */ 3443 /* pr_cursig */ 3444 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); 3445 3446 /* pr_pid */ 3447 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); 3448 3449 /* pr_reg */ 3450 offset = 72; 3451 raw_size = 144; 3452 break; 3453 } 3454 3455 /* Make a ".reg/999" section. */ 3456 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 3457 raw_size, note->descpos + offset); 3458} 3459 3460#define TARGET_BIG_SYM bfd_elf32_s390_vec 3461#define TARGET_BIG_NAME "elf32-s390" 3462#define ELF_ARCH bfd_arch_s390 3463#define ELF_MACHINE_CODE EM_S390 3464#define ELF_MACHINE_ALT1 EM_S390_OLD 3465#define ELF_MAXPAGESIZE 0x1000 3466 3467#define elf_backend_can_gc_sections 1 3468#define elf_backend_can_refcount 1 3469#define elf_backend_want_got_plt 1 3470#define elf_backend_plt_readonly 1 3471#define elf_backend_want_plt_sym 0 3472#define elf_backend_got_header_size 12 3473#define elf_backend_rela_normal 1 3474 3475#define elf_info_to_howto elf_s390_info_to_howto 3476 3477#define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name 3478#define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create 3479#define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup 3480 3481#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol 3482#define elf_backend_check_relocs elf_s390_check_relocs 3483#define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol 3484#define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections 3485#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections 3486#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol 3487#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook 3488#define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook 3489#define elf_backend_reloc_type_class elf_s390_reloc_type_class 3490#define elf_backend_relocate_section elf_s390_relocate_section 3491#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections 3492#define elf_backend_reloc_type_class elf_s390_reloc_type_class 3493#define elf_backend_grok_prstatus elf_s390_grok_prstatus 3494 3495#define bfd_elf32_mkobject elf_s390_mkobject 3496#define elf_backend_object_p elf_s390_object_p 3497 3498#include "elf32-target.h" 3499