1/* IBM S/390-specific support for 32-bit ELF 2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 3 Free Software Foundation, Inc. 4 Contributed by Carl B. Pedersen and Martin Schwidefsky. 5 6 This file is part of BFD, the Binary File Descriptor library. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 2 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 21 02110-1301, USA. */ 22 23#include "sysdep.h" 24#include "bfd.h" 25#include "bfdlink.h" 26#include "libbfd.h" 27#include "elf-bfd.h" 28 29static reloc_howto_type *elf_s390_reloc_type_lookup 30 PARAMS ((bfd *, bfd_reloc_code_real_type)); 31static void elf_s390_info_to_howto 32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); 33static bfd_boolean elf_s390_is_local_label_name 34 PARAMS ((bfd *, const char *)); 35static struct bfd_hash_entry *link_hash_newfunc 36 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); 37static struct bfd_link_hash_table *elf_s390_link_hash_table_create 38 PARAMS ((bfd *)); 39static bfd_boolean create_got_section 40 PARAMS((bfd *, struct bfd_link_info *)); 41static bfd_boolean elf_s390_create_dynamic_sections 42 PARAMS((bfd *, struct bfd_link_info *)); 43static void elf_s390_copy_indirect_symbol 44 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, 45 struct elf_link_hash_entry *)); 46static bfd_boolean elf_s390_check_relocs 47 PARAMS ((bfd *, struct bfd_link_info *, asection *, 48 const Elf_Internal_Rela *)); 49struct elf_s390_link_hash_entry; 50static void elf_s390_adjust_gotplt 51 PARAMS ((struct elf_s390_link_hash_entry *)); 52static bfd_boolean elf_s390_adjust_dynamic_symbol 53 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); 54static bfd_boolean allocate_dynrelocs 55 PARAMS ((struct elf_link_hash_entry *, PTR)); 56static bfd_boolean readonly_dynrelocs 57 PARAMS ((struct elf_link_hash_entry *, PTR)); 58static bfd_boolean elf_s390_size_dynamic_sections 59 PARAMS ((bfd *, struct bfd_link_info *)); 60static bfd_boolean elf_s390_relocate_section 61 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, 62 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); 63static bfd_boolean elf_s390_finish_dynamic_symbol 64 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, 65 Elf_Internal_Sym *)); 66static enum elf_reloc_type_class elf_s390_reloc_type_class 67 PARAMS ((const Elf_Internal_Rela *)); 68static bfd_boolean elf_s390_finish_dynamic_sections 69 PARAMS ((bfd *, struct bfd_link_info *)); 70static bfd_boolean elf_s390_object_p 71 PARAMS ((bfd *)); 72static bfd_boolean elf_s390_grok_prstatus 73 PARAMS ((bfd *, Elf_Internal_Note *)); 74static int elf_s390_tls_transition 75 PARAMS ((struct bfd_link_info *, int, int)); 76static bfd_reloc_status_type s390_tls_reloc 77 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); 78static bfd_vma dtpoff_base 79 PARAMS ((struct bfd_link_info *)); 80static bfd_vma tpoff 81 PARAMS ((struct bfd_link_info *, bfd_vma)); 82static void invalid_tls_insn 83 PARAMS ((bfd *, asection *, Elf_Internal_Rela *)); 84static bfd_reloc_status_type s390_elf_ldisp_reloc 85 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); 86 87#include "elf/s390.h" 88 89/* The relocation "howto" table. */ 90 91static reloc_howto_type elf_howto_table[] = 92{ 93 HOWTO (R_390_NONE, /* type */ 94 0, /* rightshift */ 95 0, /* size (0 = byte, 1 = short, 2 = long) */ 96 0, /* bitsize */ 97 FALSE, /* pc_relative */ 98 0, /* bitpos */ 99 complain_overflow_dont, /* complain_on_overflow */ 100 bfd_elf_generic_reloc, /* special_function */ 101 "R_390_NONE", /* name */ 102 FALSE, /* partial_inplace */ 103 0, /* src_mask */ 104 0, /* dst_mask */ 105 FALSE), /* pcrel_offset */ 106 107 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 108 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), 109 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 110 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), 111 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 112 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), 113 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 114 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), 115 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 116 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), 117 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield, 118 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), 119 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 120 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), 121 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 122 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), 123 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 124 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE), 125 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 126 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE), 127 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 128 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE), 129 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 130 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE), 131 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 132 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE), 133 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 134 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE), 135 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 136 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), 137 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, 138 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), 139 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, 140 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), 141 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, 142 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), 143 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 144 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), 145 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 146 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), 147 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 148 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE), 149 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */ 150 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */ 151 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */ 152 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */ 153 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 154 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE), 155 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 156 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), 157 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */ 158 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 159 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), 160 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 161 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), 162 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 163 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), 164 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */ 165 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 166 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE), 167 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 168 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), 169 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 170 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), 171 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */ 172 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, 173 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), 174 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, 175 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), 176 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, 177 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), 178 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 179 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE), 180 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */ 181 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 182 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), 183 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 184 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE), 185 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */ 186 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 187 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE), 188 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */ 189 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 190 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE), 191 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */ 192 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 193 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE), 194 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 195 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE), 196 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */ 197 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 198 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE), 199 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */ 200 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 201 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE), 202 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 203 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE), 204 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 205 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE), 206 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 207 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE), 208 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 209 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE), 210 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 211 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE), 212 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 213 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE), 214}; 215 216/* GNU extension to record C++ vtable hierarchy. */ 217static reloc_howto_type elf32_s390_vtinherit_howto = 218 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); 219static reloc_howto_type elf32_s390_vtentry_howto = 220 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); 221 222static reloc_howto_type * 223elf_s390_reloc_type_lookup (abfd, code) 224 bfd *abfd ATTRIBUTE_UNUSED; 225 bfd_reloc_code_real_type code; 226{ 227 switch (code) 228 { 229 case BFD_RELOC_NONE: 230 return &elf_howto_table[(int) R_390_NONE]; 231 case BFD_RELOC_8: 232 return &elf_howto_table[(int) R_390_8]; 233 case BFD_RELOC_390_12: 234 return &elf_howto_table[(int) R_390_12]; 235 case BFD_RELOC_16: 236 return &elf_howto_table[(int) R_390_16]; 237 case BFD_RELOC_32: 238 return &elf_howto_table[(int) R_390_32]; 239 case BFD_RELOC_CTOR: 240 return &elf_howto_table[(int) R_390_32]; 241 case BFD_RELOC_32_PCREL: 242 return &elf_howto_table[(int) R_390_PC32]; 243 case BFD_RELOC_390_GOT12: 244 return &elf_howto_table[(int) R_390_GOT12]; 245 case BFD_RELOC_32_GOT_PCREL: 246 return &elf_howto_table[(int) R_390_GOT32]; 247 case BFD_RELOC_390_PLT32: 248 return &elf_howto_table[(int) R_390_PLT32]; 249 case BFD_RELOC_390_COPY: 250 return &elf_howto_table[(int) R_390_COPY]; 251 case BFD_RELOC_390_GLOB_DAT: 252 return &elf_howto_table[(int) R_390_GLOB_DAT]; 253 case BFD_RELOC_390_JMP_SLOT: 254 return &elf_howto_table[(int) R_390_JMP_SLOT]; 255 case BFD_RELOC_390_RELATIVE: 256 return &elf_howto_table[(int) R_390_RELATIVE]; 257 case BFD_RELOC_32_GOTOFF: 258 return &elf_howto_table[(int) R_390_GOTOFF32]; 259 case BFD_RELOC_390_GOTPC: 260 return &elf_howto_table[(int) R_390_GOTPC]; 261 case BFD_RELOC_390_GOT16: 262 return &elf_howto_table[(int) R_390_GOT16]; 263 case BFD_RELOC_16_PCREL: 264 return &elf_howto_table[(int) R_390_PC16]; 265 case BFD_RELOC_390_PC16DBL: 266 return &elf_howto_table[(int) R_390_PC16DBL]; 267 case BFD_RELOC_390_PLT16DBL: 268 return &elf_howto_table[(int) R_390_PLT16DBL]; 269 case BFD_RELOC_390_PC32DBL: 270 return &elf_howto_table[(int) R_390_PC32DBL]; 271 case BFD_RELOC_390_PLT32DBL: 272 return &elf_howto_table[(int) R_390_PLT32DBL]; 273 case BFD_RELOC_390_GOTPCDBL: 274 return &elf_howto_table[(int) R_390_GOTPCDBL]; 275 case BFD_RELOC_390_GOTENT: 276 return &elf_howto_table[(int) R_390_GOTENT]; 277 case BFD_RELOC_16_GOTOFF: 278 return &elf_howto_table[(int) R_390_GOTOFF16]; 279 case BFD_RELOC_390_GOTPLT12: 280 return &elf_howto_table[(int) R_390_GOTPLT12]; 281 case BFD_RELOC_390_GOTPLT16: 282 return &elf_howto_table[(int) R_390_GOTPLT16]; 283 case BFD_RELOC_390_GOTPLT32: 284 return &elf_howto_table[(int) R_390_GOTPLT32]; 285 case BFD_RELOC_390_GOTPLTENT: 286 return &elf_howto_table[(int) R_390_GOTPLTENT]; 287 case BFD_RELOC_390_PLTOFF16: 288 return &elf_howto_table[(int) R_390_PLTOFF16]; 289 case BFD_RELOC_390_PLTOFF32: 290 return &elf_howto_table[(int) R_390_PLTOFF32]; 291 case BFD_RELOC_390_TLS_LOAD: 292 return &elf_howto_table[(int) R_390_TLS_LOAD]; 293 case BFD_RELOC_390_TLS_GDCALL: 294 return &elf_howto_table[(int) R_390_TLS_GDCALL]; 295 case BFD_RELOC_390_TLS_LDCALL: 296 return &elf_howto_table[(int) R_390_TLS_LDCALL]; 297 case BFD_RELOC_390_TLS_GD32: 298 return &elf_howto_table[(int) R_390_TLS_GD32]; 299 case BFD_RELOC_390_TLS_GOTIE12: 300 return &elf_howto_table[(int) R_390_TLS_GOTIE12]; 301 case BFD_RELOC_390_TLS_GOTIE32: 302 return &elf_howto_table[(int) R_390_TLS_GOTIE32]; 303 case BFD_RELOC_390_TLS_LDM32: 304 return &elf_howto_table[(int) R_390_TLS_LDM32]; 305 case BFD_RELOC_390_TLS_IE32: 306 return &elf_howto_table[(int) R_390_TLS_IE32]; 307 case BFD_RELOC_390_TLS_IEENT: 308 return &elf_howto_table[(int) R_390_TLS_IEENT]; 309 case BFD_RELOC_390_TLS_LE32: 310 return &elf_howto_table[(int) R_390_TLS_LE32]; 311 case BFD_RELOC_390_TLS_LDO32: 312 return &elf_howto_table[(int) R_390_TLS_LDO32]; 313 case BFD_RELOC_390_TLS_DTPMOD: 314 return &elf_howto_table[(int) R_390_TLS_DTPMOD]; 315 case BFD_RELOC_390_TLS_DTPOFF: 316 return &elf_howto_table[(int) R_390_TLS_DTPOFF]; 317 case BFD_RELOC_390_TLS_TPOFF: 318 return &elf_howto_table[(int) R_390_TLS_TPOFF]; 319 case BFD_RELOC_390_20: 320 return &elf_howto_table[(int) R_390_20]; 321 case BFD_RELOC_390_GOT20: 322 return &elf_howto_table[(int) R_390_GOT20]; 323 case BFD_RELOC_390_GOTPLT20: 324 return &elf_howto_table[(int) R_390_GOTPLT20]; 325 case BFD_RELOC_390_TLS_GOTIE20: 326 return &elf_howto_table[(int) R_390_TLS_GOTIE20]; 327 case BFD_RELOC_VTABLE_INHERIT: 328 return &elf32_s390_vtinherit_howto; 329 case BFD_RELOC_VTABLE_ENTRY: 330 return &elf32_s390_vtentry_howto; 331 default: 332 break; 333 } 334 return 0; 335} 336 337static reloc_howto_type * 338elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 339 const char *r_name) 340{ 341 unsigned int i; 342 343 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) 344 if (elf_howto_table[i].name != NULL 345 && strcasecmp (elf_howto_table[i].name, r_name) == 0) 346 return &elf_howto_table[i]; 347 348 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0) 349 return &elf32_s390_vtinherit_howto; 350 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0) 351 return &elf32_s390_vtentry_howto; 352 353 return NULL; 354} 355 356/* We need to use ELF32_R_TYPE so we have our own copy of this function, 357 and elf32-s390.c has its own copy. */ 358 359static void 360elf_s390_info_to_howto (abfd, cache_ptr, dst) 361 bfd *abfd ATTRIBUTE_UNUSED; 362 arelent *cache_ptr; 363 Elf_Internal_Rela *dst; 364{ 365 unsigned int r_type = ELF32_R_TYPE(dst->r_info); 366 switch (r_type) 367 { 368 case R_390_GNU_VTINHERIT: 369 cache_ptr->howto = &elf32_s390_vtinherit_howto; 370 break; 371 372 case R_390_GNU_VTENTRY: 373 cache_ptr->howto = &elf32_s390_vtentry_howto; 374 break; 375 376 default: 377 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0])) 378 { 379 (*_bfd_error_handler) (_("%B: invalid relocation type %d"), 380 abfd, (int) r_type); 381 r_type = R_390_NONE; 382 } 383 cache_ptr->howto = &elf_howto_table[r_type]; 384 } 385} 386 387/* A relocation function which doesn't do anything. */ 388static bfd_reloc_status_type 389s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section, 390 output_bfd, error_message) 391 bfd *abfd ATTRIBUTE_UNUSED; 392 arelent *reloc_entry; 393 asymbol *symbol ATTRIBUTE_UNUSED; 394 PTR data ATTRIBUTE_UNUSED; 395 asection *input_section; 396 bfd *output_bfd; 397 char **error_message ATTRIBUTE_UNUSED; 398{ 399 if (output_bfd) 400 reloc_entry->address += input_section->output_offset; 401 return bfd_reloc_ok; 402} 403 404/* Handle the large displacement relocs. */ 405static bfd_reloc_status_type 406s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section, 407 output_bfd, error_message) 408 bfd *abfd ATTRIBUTE_UNUSED; 409 arelent *reloc_entry; 410 asymbol *symbol; 411 PTR data ATTRIBUTE_UNUSED; 412 asection *input_section; 413 bfd *output_bfd; 414 char **error_message ATTRIBUTE_UNUSED; 415{ 416 reloc_howto_type *howto = reloc_entry->howto; 417 bfd_vma relocation; 418 bfd_vma insn; 419 420 if (output_bfd != (bfd *) NULL 421 && (symbol->flags & BSF_SECTION_SYM) == 0 422 && (! howto->partial_inplace 423 || reloc_entry->addend == 0)) 424 { 425 reloc_entry->address += input_section->output_offset; 426 return bfd_reloc_ok; 427 } 428 429 if (output_bfd != NULL) 430 return bfd_reloc_continue; 431 432 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 433 return bfd_reloc_outofrange; 434 435 relocation = (symbol->value 436 + symbol->section->output_section->vma 437 + symbol->section->output_offset); 438 relocation += reloc_entry->addend; 439 if (howto->pc_relative) 440 { 441 relocation -= (input_section->output_section->vma 442 + input_section->output_offset); 443 relocation -= reloc_entry->address; 444 } 445 446 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); 447 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; 448 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); 449 450 if ((bfd_signed_vma) relocation < - 0x80000 451 || (bfd_signed_vma) relocation > 0x7ffff) 452 return bfd_reloc_overflow; 453 else 454 return bfd_reloc_ok; 455} 456 457static bfd_boolean 458elf_s390_is_local_label_name (abfd, name) 459 bfd *abfd; 460 const char *name; 461{ 462 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) 463 return TRUE; 464 465 return _bfd_elf_is_local_label_name (abfd, name); 466} 467 468/* Functions for the 390 ELF linker. */ 469 470/* The name of the dynamic interpreter. This is put in the .interp 471 section. */ 472 473#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 474 475/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 476 copying dynamic variables from a shared lib into an app's dynbss 477 section, and instead use a dynamic relocation to point into the 478 shared lib. */ 479#define ELIMINATE_COPY_RELOCS 1 480 481/* The size in bytes of the first entry in the procedure linkage table. */ 482#define PLT_FIRST_ENTRY_SIZE 32 483/* The size in bytes of an entry in the procedure linkage table. */ 484#define PLT_ENTRY_SIZE 32 485 486#define GOT_ENTRY_SIZE 4 487 488/* The first three entries in a procedure linkage table are reserved, 489 and the initial contents are unimportant (we zero them out). 490 Subsequent entries look like this. See the SVR4 ABI 386 491 supplement to see how this works. */ 492 493/* For the s390, simple addr offset can only be 0 - 4096. 494 To use the full 2 GB address space, several instructions 495 are needed to load an address in a register and execute 496 a branch( or just saving the address) 497 498 Furthermore, only r 0 and 1 are free to use!!! */ 499 500/* The first 3 words in the GOT are then reserved. 501 Word 0 is the address of the dynamic table. 502 Word 1 is a pointer to a structure describing the object 503 Word 2 is used to point to the loader entry address. 504 505 The code for position independent PLT entries looks like this: 506 507 r12 holds addr of the current GOT at entry to the PLT 508 509 The GOT holds the address in the PLT to be executed. 510 The loader then gets: 511 24(15) = Pointer to the structure describing the object. 512 28(15) = Offset in symbol table 513 514 The loader must then find the module where the function is 515 and insert the address in the GOT. 516 517 Note: 390 can only address +- 64 K relative. 518 We check if offset > 65536, then make a relative branch -64xxx 519 back to a previous defined branch 520 521PLT1: BASR 1,0 # 2 bytes 522 L 1,22(1) # 4 bytes Load offset in GOT in r 1 523 L 1,(1,12) # 4 bytes Load address from GOT in r1 524 BCR 15,1 # 2 bytes Jump to address 525RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 526 L 1,14(1) # 4 bytes Load offset in symol table in r1 527 BRC 15,-x # 4 bytes Jump to start of PLT 528 .word 0 # 2 bytes filler 529 .long ? # 4 bytes offset in GOT 530 .long ? # 4 bytes offset into symbol table 531 532 This was the general case. There are two additional, optimizes PLT 533 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768. 534 First the one for GOT offsets < 4096: 535 536PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1 537 BCR 15,1 # 2 bytes Jump to address 538 .word 0,0,0 # 6 bytes filler 539RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 540 L 1,14(1) # 4 bytes Load offset in symbol table in r1 541 BRC 15,-x # 4 bytes Jump to start of PLT 542 .word 0,0,0 # 6 bytes filler 543 .long ? # 4 bytes offset into symbol table 544 545 Second the one for GOT offsets < 32768: 546 547PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1 548 L 1,(1,12) # 4 bytes Load address from GOT to r1 549 BCR 15,1 # 2 bytes Jump to address 550 .word 0 # 2 bytes filler 551RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 552 L 1,14(1) # 4 bytes Load offset in symbol table in r1 553 BRC 15,-x # 4 bytes Jump to start of PLT 554 .word 0,0,0 # 6 bytes filler 555 .long ? # 4 bytes offset into symbol table 556 557Total = 32 bytes per PLT entry 558 559 The code for static build PLT entries looks like this: 560 561PLT1: BASR 1,0 # 2 bytes 562 L 1,22(1) # 4 bytes Load address of GOT entry 563 L 1,0(0,1) # 4 bytes Load address from GOT in r1 564 BCR 15,1 # 2 bytes Jump to address 565RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 566 L 1,14(1) # 4 bytes Load offset in symbol table in r1 567 BRC 15,-x # 4 bytes Jump to start of PLT 568 .word 0 # 2 bytes filler 569 .long ? # 4 bytes address of GOT entry 570 .long ? # 4 bytes offset into symbol table */ 571 572#define PLT_PIC_ENTRY_WORD0 0x0d105810 573#define PLT_PIC_ENTRY_WORD1 0x10165811 574#define PLT_PIC_ENTRY_WORD2 0xc00007f1 575#define PLT_PIC_ENTRY_WORD3 0x0d105810 576#define PLT_PIC_ENTRY_WORD4 0x100ea7f4 577 578#define PLT_PIC12_ENTRY_WORD0 0x5810c000 579#define PLT_PIC12_ENTRY_WORD1 0x07f10000 580#define PLT_PIC12_ENTRY_WORD2 0x00000000 581#define PLT_PIC12_ENTRY_WORD3 0x0d105810 582#define PLT_PIC12_ENTRY_WORD4 0x100ea7f4 583 584#define PLT_PIC16_ENTRY_WORD0 0xa7180000 585#define PLT_PIC16_ENTRY_WORD1 0x5811c000 586#define PLT_PIC16_ENTRY_WORD2 0x07f10000 587#define PLT_PIC16_ENTRY_WORD3 0x0d105810 588#define PLT_PIC16_ENTRY_WORD4 0x100ea7f4 589 590#define PLT_ENTRY_WORD0 0x0d105810 591#define PLT_ENTRY_WORD1 0x10165810 592#define PLT_ENTRY_WORD2 0x100007f1 593#define PLT_ENTRY_WORD3 0x0d105810 594#define PLT_ENTRY_WORD4 0x100ea7f4 595 596/* The first PLT entry pushes the offset into the symbol table 597 from R1 onto the stack at 8(15) and the loader object info 598 at 12(15), loads the loader address in R1 and jumps to it. */ 599 600/* The first entry in the PLT for PIC code: 601 602PLT0: 603 ST 1,28(15) # R1 has offset into symbol table 604 L 1,4(12) # Get loader ino(object struct address) 605 ST 1,24(15) # Store address 606 L 1,8(12) # Entry address of loader in R1 607 BR 1 # Jump to loader 608 609 The first entry in the PLT for static code: 610 611PLT0: 612 ST 1,28(15) # R1 has offset into symbol table 613 BASR 1,0 614 L 1,18(0,1) # Get address of GOT 615 MVC 24(4,15),4(1) # Move loader ino to stack 616 L 1,8(1) # Get address of loader 617 BR 1 # Jump to loader 618 .word 0 # filler 619 .long got # address of GOT */ 620 621#define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c 622#define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004 623#define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018 624#define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008 625#define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000 626 627#define PLT_FIRST_ENTRY_WORD0 0x5010f01c 628#define PLT_FIRST_ENTRY_WORD1 0x0d105810 629#define PLT_FIRST_ENTRY_WORD2 0x1012D203 630#define PLT_FIRST_ENTRY_WORD3 0xf0181004 631#define PLT_FIRST_ENTRY_WORD4 0x58101008 632#define PLT_FIRST_ENTRY_WORD5 0x07f10000 633 634/* The s390 linker needs to keep track of the number of relocs that it 635 decides to copy as dynamic relocs in check_relocs for each symbol. 636 This is so that it can later discard them if they are found to be 637 unnecessary. We store the information in a field extending the 638 regular ELF linker hash table. */ 639 640struct elf_s390_dyn_relocs 641{ 642 struct elf_s390_dyn_relocs *next; 643 644 /* The input section of the reloc. */ 645 asection *sec; 646 647 /* Total number of relocs copied for the input section. */ 648 bfd_size_type count; 649 650 /* Number of pc-relative relocs copied for the input section. */ 651 bfd_size_type pc_count; 652}; 653 654/* s390 ELF linker hash entry. */ 655 656struct elf_s390_link_hash_entry 657{ 658 struct elf_link_hash_entry elf; 659 660 /* Track dynamic relocs copied for this symbol. */ 661 struct elf_s390_dyn_relocs *dyn_relocs; 662 663 /* Number of GOTPLT references for a function. */ 664 bfd_signed_vma gotplt_refcount; 665 666#define GOT_UNKNOWN 0 667#define GOT_NORMAL 1 668#define GOT_TLS_GD 2 669#define GOT_TLS_IE 3 670#define GOT_TLS_IE_NLT 4 671 unsigned char tls_type; 672}; 673 674#define elf_s390_hash_entry(ent) \ 675 ((struct elf_s390_link_hash_entry *)(ent)) 676 677struct elf_s390_obj_tdata 678{ 679 struct elf_obj_tdata root; 680 681 /* tls_type for each local got entry. */ 682 char *local_got_tls_type; 683}; 684 685#define elf_s390_tdata(abfd) \ 686 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) 687 688#define elf_s390_local_got_tls_type(abfd) \ 689 (elf_s390_tdata (abfd)->local_got_tls_type) 690 691static bfd_boolean 692elf_s390_mkobject (bfd *abfd) 693{ 694 if (abfd->tdata.any == NULL) 695 { 696 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); 697 abfd->tdata.any = bfd_zalloc (abfd, amt); 698 if (abfd->tdata.any == NULL) 699 return FALSE; 700 } 701 return bfd_elf_mkobject (abfd); 702} 703 704static bfd_boolean 705elf_s390_object_p (abfd) 706 bfd *abfd; 707{ 708 /* Set the right machine number for an s390 elf32 file. */ 709 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31); 710} 711 712/* s390 ELF linker hash table. */ 713 714struct elf_s390_link_hash_table 715{ 716 struct elf_link_hash_table elf; 717 718 /* Short-cuts to get to dynamic linker sections. */ 719 asection *sgot; 720 asection *sgotplt; 721 asection *srelgot; 722 asection *splt; 723 asection *srelplt; 724 asection *sdynbss; 725 asection *srelbss; 726 727 union { 728 bfd_signed_vma refcount; 729 bfd_vma offset; 730 } tls_ldm_got; 731 732 /* Small local sym to section mapping cache. */ 733 struct sym_sec_cache sym_sec; 734}; 735 736/* Get the s390 ELF linker hash table from a link_info structure. */ 737 738#define elf_s390_hash_table(p) \ 739 ((struct elf_s390_link_hash_table *) ((p)->hash)) 740 741/* Create an entry in an s390 ELF linker hash table. */ 742 743static struct bfd_hash_entry * 744link_hash_newfunc (entry, table, string) 745 struct bfd_hash_entry *entry; 746 struct bfd_hash_table *table; 747 const char *string; 748{ 749 /* Allocate the structure if it has not already been allocated by a 750 subclass. */ 751 if (entry == NULL) 752 { 753 entry = bfd_hash_allocate (table, 754 sizeof (struct elf_s390_link_hash_entry)); 755 if (entry == NULL) 756 return entry; 757 } 758 759 /* Call the allocation method of the superclass. */ 760 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 761 if (entry != NULL) 762 { 763 struct elf_s390_link_hash_entry *eh; 764 765 eh = (struct elf_s390_link_hash_entry *) entry; 766 eh->dyn_relocs = NULL; 767 eh->gotplt_refcount = 0; 768 eh->tls_type = GOT_UNKNOWN; 769 } 770 771 return entry; 772} 773 774/* Create an s390 ELF linker hash table. */ 775 776static struct bfd_link_hash_table * 777elf_s390_link_hash_table_create (abfd) 778 bfd *abfd; 779{ 780 struct elf_s390_link_hash_table *ret; 781 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); 782 783 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt); 784 if (ret == NULL) 785 return NULL; 786 787 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, 788 sizeof (struct elf_s390_link_hash_entry))) 789 { 790 free (ret); 791 return NULL; 792 } 793 794 ret->sgot = NULL; 795 ret->sgotplt = NULL; 796 ret->srelgot = NULL; 797 ret->splt = NULL; 798 ret->srelplt = NULL; 799 ret->sdynbss = NULL; 800 ret->srelbss = NULL; 801 ret->tls_ldm_got.refcount = 0; 802 ret->sym_sec.abfd = NULL; 803 804 return &ret->elf.root; 805} 806 807/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up 808 shortcuts to them in our hash table. */ 809 810static bfd_boolean 811create_got_section (dynobj, info) 812 bfd *dynobj; 813 struct bfd_link_info *info; 814{ 815 struct elf_s390_link_hash_table *htab; 816 817 if (! _bfd_elf_create_got_section (dynobj, info)) 818 return FALSE; 819 820 htab = elf_s390_hash_table (info); 821 htab->sgot = bfd_get_section_by_name (dynobj, ".got"); 822 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); 823 if (!htab->sgot || !htab->sgotplt) 824 abort (); 825 826 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got", 827 (SEC_ALLOC | SEC_LOAD 828 | SEC_HAS_CONTENTS 829 | SEC_IN_MEMORY 830 | SEC_LINKER_CREATED 831 | SEC_READONLY)); 832 if (htab->srelgot == NULL 833 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) 834 return FALSE; 835 return TRUE; 836} 837 838/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and 839 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our 840 hash table. */ 841 842static bfd_boolean 843elf_s390_create_dynamic_sections (dynobj, info) 844 bfd *dynobj; 845 struct bfd_link_info *info; 846{ 847 struct elf_s390_link_hash_table *htab; 848 849 htab = elf_s390_hash_table (info); 850 if (!htab->sgot && !create_got_section (dynobj, info)) 851 return FALSE; 852 853 if (!_bfd_elf_create_dynamic_sections (dynobj, info)) 854 return FALSE; 855 856 htab->splt = bfd_get_section_by_name (dynobj, ".plt"); 857 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); 858 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); 859 if (!info->shared) 860 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); 861 862 if (!htab->splt || !htab->srelplt || !htab->sdynbss 863 || (!info->shared && !htab->srelbss)) 864 abort (); 865 866 return TRUE; 867} 868 869/* Copy the extra info we tack onto an elf_link_hash_entry. */ 870 871static void 872elf_s390_copy_indirect_symbol (info, dir, ind) 873 struct bfd_link_info *info; 874 struct elf_link_hash_entry *dir, *ind; 875{ 876 struct elf_s390_link_hash_entry *edir, *eind; 877 878 edir = (struct elf_s390_link_hash_entry *) dir; 879 eind = (struct elf_s390_link_hash_entry *) ind; 880 881 if (eind->dyn_relocs != NULL) 882 { 883 if (edir->dyn_relocs != NULL) 884 { 885 struct elf_s390_dyn_relocs **pp; 886 struct elf_s390_dyn_relocs *p; 887 888 /* Add reloc counts against the indirect sym to the direct sym 889 list. Merge any entries against the same section. */ 890 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 891 { 892 struct elf_s390_dyn_relocs *q; 893 894 for (q = edir->dyn_relocs; q != NULL; q = q->next) 895 if (q->sec == p->sec) 896 { 897 q->pc_count += p->pc_count; 898 q->count += p->count; 899 *pp = p->next; 900 break; 901 } 902 if (q == NULL) 903 pp = &p->next; 904 } 905 *pp = edir->dyn_relocs; 906 } 907 908 edir->dyn_relocs = eind->dyn_relocs; 909 eind->dyn_relocs = NULL; 910 } 911 912 if (ind->root.type == bfd_link_hash_indirect 913 && dir->got.refcount <= 0) 914 { 915 edir->tls_type = eind->tls_type; 916 eind->tls_type = GOT_UNKNOWN; 917 } 918 919 if (ELIMINATE_COPY_RELOCS 920 && ind->root.type != bfd_link_hash_indirect 921 && dir->dynamic_adjusted) 922 { 923 /* If called to transfer flags for a weakdef during processing 924 of elf_adjust_dynamic_symbol, don't copy non_got_ref. 925 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 926 dir->ref_dynamic |= ind->ref_dynamic; 927 dir->ref_regular |= ind->ref_regular; 928 dir->ref_regular_nonweak |= ind->ref_regular_nonweak; 929 dir->needs_plt |= ind->needs_plt; 930 } 931 else 932 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 933} 934 935static int 936elf_s390_tls_transition (info, r_type, is_local) 937 struct bfd_link_info *info; 938 int r_type; 939 int is_local; 940{ 941 if (info->shared) 942 return r_type; 943 944 switch (r_type) 945 { 946 case R_390_TLS_GD32: 947 case R_390_TLS_IE32: 948 if (is_local) 949 return R_390_TLS_LE32; 950 return R_390_TLS_IE32; 951 case R_390_TLS_GOTIE32: 952 if (is_local) 953 return R_390_TLS_LE32; 954 return R_390_TLS_GOTIE32; 955 case R_390_TLS_LDM32: 956 return R_390_TLS_LE32; 957 } 958 959 return r_type; 960} 961 962/* Look through the relocs for a section during the first phase, and 963 allocate space in the global offset table or procedure linkage 964 table. */ 965 966static bfd_boolean 967elf_s390_check_relocs (abfd, info, sec, relocs) 968 bfd *abfd; 969 struct bfd_link_info *info; 970 asection *sec; 971 const Elf_Internal_Rela *relocs; 972{ 973 struct elf_s390_link_hash_table *htab; 974 Elf_Internal_Shdr *symtab_hdr; 975 struct elf_link_hash_entry **sym_hashes; 976 const Elf_Internal_Rela *rel; 977 const Elf_Internal_Rela *rel_end; 978 asection *sreloc; 979 bfd_signed_vma *local_got_refcounts; 980 int tls_type, old_tls_type; 981 982 if (info->relocatable) 983 return TRUE; 984 985 htab = elf_s390_hash_table (info); 986 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 987 sym_hashes = elf_sym_hashes (abfd); 988 local_got_refcounts = elf_local_got_refcounts (abfd); 989 990 sreloc = NULL; 991 992 rel_end = relocs + sec->reloc_count; 993 for (rel = relocs; rel < rel_end; rel++) 994 { 995 unsigned int r_type; 996 unsigned long r_symndx; 997 struct elf_link_hash_entry *h; 998 999 r_symndx = ELF32_R_SYM (rel->r_info); 1000 1001 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) 1002 { 1003 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), 1004 abfd, r_symndx); 1005 return FALSE; 1006 } 1007 1008 if (r_symndx < symtab_hdr->sh_info) 1009 h = NULL; 1010 else 1011 { 1012 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1013 while (h->root.type == bfd_link_hash_indirect 1014 || h->root.type == bfd_link_hash_warning) 1015 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1016 } 1017 1018 /* Create got section and local_got_refcounts array if they 1019 are needed. */ 1020 r_type = elf_s390_tls_transition (info, 1021 ELF32_R_TYPE (rel->r_info), 1022 h == NULL); 1023 switch (r_type) 1024 { 1025 case R_390_GOT12: 1026 case R_390_GOT16: 1027 case R_390_GOT20: 1028 case R_390_GOT32: 1029 case R_390_GOTENT: 1030 case R_390_GOTPLT12: 1031 case R_390_GOTPLT16: 1032 case R_390_GOTPLT20: 1033 case R_390_GOTPLT32: 1034 case R_390_GOTPLTENT: 1035 case R_390_TLS_GD32: 1036 case R_390_TLS_GOTIE12: 1037 case R_390_TLS_GOTIE20: 1038 case R_390_TLS_GOTIE32: 1039 case R_390_TLS_IEENT: 1040 case R_390_TLS_IE32: 1041 case R_390_TLS_LDM32: 1042 if (h == NULL 1043 && local_got_refcounts == NULL) 1044 { 1045 bfd_size_type size; 1046 1047 size = symtab_hdr->sh_info; 1048 size *= (sizeof (bfd_signed_vma) + sizeof(char)); 1049 local_got_refcounts = ((bfd_signed_vma *) 1050 bfd_zalloc (abfd, size)); 1051 if (local_got_refcounts == NULL) 1052 return FALSE; 1053 elf_local_got_refcounts (abfd) = local_got_refcounts; 1054 elf_s390_local_got_tls_type (abfd) 1055 = (char *) (local_got_refcounts + symtab_hdr->sh_info); 1056 } 1057 /* Fall through. */ 1058 case R_390_GOTOFF16: 1059 case R_390_GOTOFF32: 1060 case R_390_GOTPC: 1061 case R_390_GOTPCDBL: 1062 if (htab->sgot == NULL) 1063 { 1064 if (htab->elf.dynobj == NULL) 1065 htab->elf.dynobj = abfd; 1066 if (!create_got_section (htab->elf.dynobj, info)) 1067 return FALSE; 1068 } 1069 } 1070 1071 switch (r_type) 1072 { 1073 case R_390_GOTOFF16: 1074 case R_390_GOTOFF32: 1075 case R_390_GOTPC: 1076 case R_390_GOTPCDBL: 1077 /* Got is created, nothing to be done. */ 1078 break; 1079 1080 case R_390_PLT16DBL: 1081 case R_390_PLT32DBL: 1082 case R_390_PLT32: 1083 case R_390_PLTOFF16: 1084 case R_390_PLTOFF32: 1085 /* This symbol requires a procedure linkage table entry. We 1086 actually build the entry in adjust_dynamic_symbol, 1087 because this might be a case of linking PIC code which is 1088 never referenced by a dynamic object, in which case we 1089 don't need to generate a procedure linkage table entry 1090 after all. */ 1091 1092 /* If this is a local symbol, we resolve it directly without 1093 creating a procedure linkage table entry. */ 1094 if (h != NULL) 1095 { 1096 h->needs_plt = 1; 1097 h->plt.refcount += 1; 1098 } 1099 break; 1100 1101 case R_390_GOTPLT12: 1102 case R_390_GOTPLT16: 1103 case R_390_GOTPLT20: 1104 case R_390_GOTPLT32: 1105 case R_390_GOTPLTENT: 1106 /* This symbol requires either a procedure linkage table entry 1107 or an entry in the local got. We actually build the entry 1108 in adjust_dynamic_symbol because whether this is really a 1109 global reference can change and with it the fact if we have 1110 to create a plt entry or a local got entry. To be able to 1111 make a once global symbol a local one we have to keep track 1112 of the number of gotplt references that exist for this 1113 symbol. */ 1114 if (h != NULL) 1115 { 1116 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; 1117 h->needs_plt = 1; 1118 h->plt.refcount += 1; 1119 } 1120 else 1121 local_got_refcounts[r_symndx] += 1; 1122 break; 1123 1124 case R_390_TLS_LDM32: 1125 htab->tls_ldm_got.refcount += 1; 1126 break; 1127 1128 case R_390_TLS_IE32: 1129 case R_390_TLS_GOTIE12: 1130 case R_390_TLS_GOTIE20: 1131 case R_390_TLS_GOTIE32: 1132 case R_390_TLS_IEENT: 1133 if (info->shared) 1134 info->flags |= DF_STATIC_TLS; 1135 /* Fall through. */ 1136 1137 case R_390_GOT12: 1138 case R_390_GOT16: 1139 case R_390_GOT20: 1140 case R_390_GOT32: 1141 case R_390_GOTENT: 1142 case R_390_TLS_GD32: 1143 /* This symbol requires a global offset table entry. */ 1144 switch (r_type) 1145 { 1146 default: 1147 case R_390_GOT12: 1148 case R_390_GOT16: 1149 case R_390_GOT20: 1150 case R_390_GOT32: 1151 case R_390_GOTENT: 1152 tls_type = GOT_NORMAL; 1153 break; 1154 case R_390_TLS_GD32: 1155 tls_type = GOT_TLS_GD; 1156 break; 1157 case R_390_TLS_IE32: 1158 case R_390_TLS_GOTIE32: 1159 tls_type = GOT_TLS_IE; 1160 break; 1161 case R_390_TLS_GOTIE12: 1162 case R_390_TLS_GOTIE20: 1163 case R_390_TLS_IEENT: 1164 tls_type = GOT_TLS_IE_NLT; 1165 break; 1166 } 1167 1168 if (h != NULL) 1169 { 1170 h->got.refcount += 1; 1171 old_tls_type = elf_s390_hash_entry(h)->tls_type; 1172 } 1173 else 1174 { 1175 local_got_refcounts[r_symndx] += 1; 1176 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; 1177 } 1178 /* If a TLS symbol is accessed using IE at least once, 1179 there is no point to use dynamic model for it. */ 1180 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) 1181 { 1182 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) 1183 { 1184 (*_bfd_error_handler) 1185 (_("%B: `%s' accessed both as normal and thread local symbol"), 1186 abfd, h->root.root.string); 1187 return FALSE; 1188 } 1189 if (old_tls_type > tls_type) 1190 tls_type = old_tls_type; 1191 } 1192 1193 if (old_tls_type != tls_type) 1194 { 1195 if (h != NULL) 1196 elf_s390_hash_entry (h)->tls_type = tls_type; 1197 else 1198 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; 1199 } 1200 1201 if (r_type != R_390_TLS_IE32) 1202 break; 1203 /* Fall through. */ 1204 1205 case R_390_TLS_LE32: 1206 if (!info->shared) 1207 break; 1208 info->flags |= DF_STATIC_TLS; 1209 /* Fall through. */ 1210 1211 case R_390_8: 1212 case R_390_16: 1213 case R_390_32: 1214 case R_390_PC16: 1215 case R_390_PC16DBL: 1216 case R_390_PC32DBL: 1217 case R_390_PC32: 1218 if (h != NULL && !info->shared) 1219 { 1220 /* If this reloc is in a read-only section, we might 1221 need a copy reloc. We can't check reliably at this 1222 stage whether the section is read-only, as input 1223 sections have not yet been mapped to output sections. 1224 Tentatively set the flag for now, and correct in 1225 adjust_dynamic_symbol. */ 1226 h->non_got_ref = 1; 1227 1228 /* We may need a .plt entry if the function this reloc 1229 refers to is in a shared lib. */ 1230 h->plt.refcount += 1; 1231 } 1232 1233 /* If we are creating a shared library, and this is a reloc 1234 against a global symbol, or a non PC relative reloc 1235 against a local symbol, then we need to copy the reloc 1236 into the shared library. However, if we are linking with 1237 -Bsymbolic, we do not need to copy a reloc against a 1238 global symbol which is defined in an object we are 1239 including in the link (i.e., DEF_REGULAR is set). At 1240 this point we have not seen all the input files, so it is 1241 possible that DEF_REGULAR is not set now but will be set 1242 later (it is never cleared). In case of a weak definition, 1243 DEF_REGULAR may be cleared later by a strong definition in 1244 a shared library. We account for that possibility below by 1245 storing information in the relocs_copied field of the hash 1246 table entry. A similar situation occurs when creating 1247 shared libraries and symbol visibility changes render the 1248 symbol local. 1249 1250 If on the other hand, we are creating an executable, we 1251 may need to keep relocations for symbols satisfied by a 1252 dynamic library if we manage to avoid copy relocs for the 1253 symbol. */ 1254 if ((info->shared 1255 && (sec->flags & SEC_ALLOC) != 0 1256 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16 1257 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL 1258 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL 1259 && ELF32_R_TYPE (rel->r_info) != R_390_PC32) 1260 || (h != NULL 1261 && (! info->symbolic 1262 || h->root.type == bfd_link_hash_defweak 1263 || !h->def_regular)))) 1264 || (ELIMINATE_COPY_RELOCS 1265 && !info->shared 1266 && (sec->flags & SEC_ALLOC) != 0 1267 && h != NULL 1268 && (h->root.type == bfd_link_hash_defweak 1269 || !h->def_regular))) 1270 { 1271 struct elf_s390_dyn_relocs *p; 1272 struct elf_s390_dyn_relocs **head; 1273 1274 /* We must copy these reloc types into the output file. 1275 Create a reloc section in dynobj and make room for 1276 this reloc. */ 1277 if (sreloc == NULL) 1278 { 1279 const char *name; 1280 bfd *dynobj; 1281 1282 name = (bfd_elf_string_from_elf_section 1283 (abfd, 1284 elf_elfheader (abfd)->e_shstrndx, 1285 elf_section_data (sec)->rel_hdr.sh_name)); 1286 if (name == NULL) 1287 return FALSE; 1288 1289 if (! CONST_STRNEQ (name, ".rela") 1290 || strcmp (bfd_get_section_name (abfd, sec), 1291 name + 5) != 0) 1292 { 1293 (*_bfd_error_handler) 1294 (_("%B: bad relocation section name `%s\'"), 1295 abfd, name); 1296 } 1297 1298 if (htab->elf.dynobj == NULL) 1299 htab->elf.dynobj = abfd; 1300 1301 dynobj = htab->elf.dynobj; 1302 sreloc = bfd_get_section_by_name (dynobj, name); 1303 if (sreloc == NULL) 1304 { 1305 flagword flags; 1306 1307 flags = (SEC_HAS_CONTENTS | SEC_READONLY 1308 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 1309 if ((sec->flags & SEC_ALLOC) != 0) 1310 flags |= SEC_ALLOC | SEC_LOAD; 1311 sreloc = bfd_make_section_with_flags (dynobj, 1312 name, 1313 flags); 1314 if (sreloc == NULL 1315 || ! bfd_set_section_alignment (dynobj, sreloc, 2)) 1316 return FALSE; 1317 } 1318 elf_section_data (sec)->sreloc = sreloc; 1319 } 1320 1321 /* If this is a global symbol, we count the number of 1322 relocations we need for this symbol. */ 1323 if (h != NULL) 1324 { 1325 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; 1326 } 1327 else 1328 { 1329 /* Track dynamic relocs needed for local syms too. 1330 We really need local syms available to do this 1331 easily. Oh well. */ 1332 asection *s; 1333 void *vpp; 1334 1335 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, 1336 sec, r_symndx); 1337 if (s == NULL) 1338 return FALSE; 1339 1340 vpp = &elf_section_data (s)->local_dynrel; 1341 head = (struct elf_s390_dyn_relocs **) vpp; 1342 } 1343 1344 p = *head; 1345 if (p == NULL || p->sec != sec) 1346 { 1347 bfd_size_type amt = sizeof *p; 1348 1349 p = ((struct elf_s390_dyn_relocs *) 1350 bfd_alloc (htab->elf.dynobj, amt)); 1351 if (p == NULL) 1352 return FALSE; 1353 p->next = *head; 1354 *head = p; 1355 p->sec = sec; 1356 p->count = 0; 1357 p->pc_count = 0; 1358 } 1359 1360 p->count += 1; 1361 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16 1362 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL 1363 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL 1364 || ELF32_R_TYPE (rel->r_info) == R_390_PC32) 1365 p->pc_count += 1; 1366 } 1367 break; 1368 1369 /* This relocation describes the C++ object vtable hierarchy. 1370 Reconstruct it for later use during GC. */ 1371 case R_390_GNU_VTINHERIT: 1372 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1373 return FALSE; 1374 break; 1375 1376 /* This relocation describes which C++ vtable entries are actually 1377 used. Record for later use during GC. */ 1378 case R_390_GNU_VTENTRY: 1379 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1380 return FALSE; 1381 break; 1382 1383 default: 1384 break; 1385 } 1386 } 1387 1388 return TRUE; 1389} 1390 1391/* Return the section that should be marked against GC for a given 1392 relocation. */ 1393 1394static asection * 1395elf_s390_gc_mark_hook (asection *sec, 1396 struct bfd_link_info *info, 1397 Elf_Internal_Rela *rel, 1398 struct elf_link_hash_entry *h, 1399 Elf_Internal_Sym *sym) 1400{ 1401 if (h != NULL) 1402 switch (ELF32_R_TYPE (rel->r_info)) 1403 { 1404 case R_390_GNU_VTINHERIT: 1405 case R_390_GNU_VTENTRY: 1406 return NULL; 1407 } 1408 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1409 1410} 1411 1412/* Update the got entry reference counts for the section being removed. */ 1413 1414static bfd_boolean 1415elf_s390_gc_sweep_hook (bfd *abfd, 1416 struct bfd_link_info *info, 1417 asection *sec, 1418 const Elf_Internal_Rela *relocs) 1419{ 1420 Elf_Internal_Shdr *symtab_hdr; 1421 struct elf_link_hash_entry **sym_hashes; 1422 bfd_signed_vma *local_got_refcounts; 1423 const Elf_Internal_Rela *rel, *relend; 1424 1425 elf_section_data (sec)->local_dynrel = NULL; 1426 1427 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1428 sym_hashes = elf_sym_hashes (abfd); 1429 local_got_refcounts = elf_local_got_refcounts (abfd); 1430 1431 relend = relocs + sec->reloc_count; 1432 for (rel = relocs; rel < relend; rel++) 1433 { 1434 unsigned long r_symndx; 1435 unsigned int r_type; 1436 struct elf_link_hash_entry *h = NULL; 1437 1438 r_symndx = ELF32_R_SYM (rel->r_info); 1439 if (r_symndx >= symtab_hdr->sh_info) 1440 { 1441 struct elf_s390_link_hash_entry *eh; 1442 struct elf_s390_dyn_relocs **pp; 1443 struct elf_s390_dyn_relocs *p; 1444 1445 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1446 while (h->root.type == bfd_link_hash_indirect 1447 || h->root.type == bfd_link_hash_warning) 1448 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1449 eh = (struct elf_s390_link_hash_entry *) h; 1450 1451 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 1452 if (p->sec == sec) 1453 { 1454 /* Everything must go for SEC. */ 1455 *pp = p->next; 1456 break; 1457 } 1458 } 1459 1460 r_type = ELF32_R_TYPE (rel->r_info); 1461 r_type = elf_s390_tls_transition (info, r_type, h != NULL); 1462 switch (r_type) 1463 { 1464 case R_390_TLS_LDM32: 1465 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) 1466 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; 1467 break; 1468 1469 case R_390_TLS_GD32: 1470 case R_390_TLS_IE32: 1471 case R_390_TLS_GOTIE12: 1472 case R_390_TLS_GOTIE20: 1473 case R_390_TLS_GOTIE32: 1474 case R_390_TLS_IEENT: 1475 case R_390_GOT12: 1476 case R_390_GOT16: 1477 case R_390_GOT20: 1478 case R_390_GOT32: 1479 case R_390_GOTOFF16: 1480 case R_390_GOTOFF32: 1481 case R_390_GOTPC: 1482 case R_390_GOTPCDBL: 1483 case R_390_GOTENT: 1484 if (h != NULL) 1485 { 1486 if (h->got.refcount > 0) 1487 h->got.refcount -= 1; 1488 } 1489 else if (local_got_refcounts != NULL) 1490 { 1491 if (local_got_refcounts[r_symndx] > 0) 1492 local_got_refcounts[r_symndx] -= 1; 1493 } 1494 break; 1495 1496 case R_390_8: 1497 case R_390_12: 1498 case R_390_16: 1499 case R_390_20: 1500 case R_390_32: 1501 case R_390_PC16: 1502 case R_390_PC16DBL: 1503 case R_390_PC32DBL: 1504 case R_390_PC32: 1505 if (info->shared) 1506 break; 1507 /* Fall through. */ 1508 1509 case R_390_PLT16DBL: 1510 case R_390_PLT32DBL: 1511 case R_390_PLT32: 1512 case R_390_PLTOFF16: 1513 case R_390_PLTOFF32: 1514 if (h != NULL) 1515 { 1516 if (h->plt.refcount > 0) 1517 h->plt.refcount -= 1; 1518 } 1519 break; 1520 1521 case R_390_GOTPLT12: 1522 case R_390_GOTPLT16: 1523 case R_390_GOTPLT20: 1524 case R_390_GOTPLT32: 1525 case R_390_GOTPLTENT: 1526 if (h != NULL) 1527 { 1528 if (h->plt.refcount > 0) 1529 { 1530 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; 1531 h->plt.refcount -= 1; 1532 } 1533 } 1534 else if (local_got_refcounts != NULL) 1535 { 1536 if (local_got_refcounts[r_symndx] > 0) 1537 local_got_refcounts[r_symndx] -= 1; 1538 } 1539 break; 1540 1541 default: 1542 break; 1543 } 1544 } 1545 1546 return TRUE; 1547} 1548 1549/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT 1550 entry but we found we will not create any. Called when we find we will 1551 not have any PLT for this symbol, by for example 1552 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, 1553 or elf_s390_size_dynamic_sections if no dynamic sections will be 1554 created (we're only linking static objects). */ 1555 1556static void 1557elf_s390_adjust_gotplt (h) 1558 struct elf_s390_link_hash_entry *h; 1559{ 1560 if (h->elf.root.type == bfd_link_hash_warning) 1561 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; 1562 1563 if (h->gotplt_refcount <= 0) 1564 return; 1565 1566 /* We simply add the number of gotplt references to the number 1567 * of got references for this symbol. */ 1568 h->elf.got.refcount += h->gotplt_refcount; 1569 h->gotplt_refcount = -1; 1570} 1571 1572/* Adjust a symbol defined by a dynamic object and referenced by a 1573 regular object. The current definition is in some section of the 1574 dynamic object, but we're not including those sections. We have to 1575 change the definition to something the rest of the link can 1576 understand. */ 1577 1578static bfd_boolean 1579elf_s390_adjust_dynamic_symbol (info, h) 1580 struct bfd_link_info *info; 1581 struct elf_link_hash_entry *h; 1582{ 1583 struct elf_s390_link_hash_table *htab; 1584 asection *s; 1585 1586 /* If this is a function, put it in the procedure linkage table. We 1587 will fill in the contents of the procedure linkage table later 1588 (although we could actually do it here). */ 1589 if (h->type == STT_FUNC 1590 || h->needs_plt) 1591 { 1592 if (h->plt.refcount <= 0 1593 || (! info->shared 1594 && !h->def_dynamic 1595 && !h->ref_dynamic 1596 && h->root.type != bfd_link_hash_undefweak 1597 && h->root.type != bfd_link_hash_undefined)) 1598 { 1599 /* This case can occur if we saw a PLT32 reloc in an input 1600 file, but the symbol was never referred to by a dynamic 1601 object, or if all references were garbage collected. In 1602 such a case, we don't actually need to build a procedure 1603 linkage table, and we can just do a PC32 reloc instead. */ 1604 h->plt.offset = (bfd_vma) -1; 1605 h->needs_plt = 0; 1606 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1607 } 1608 1609 return TRUE; 1610 } 1611 else 1612 /* It's possible that we incorrectly decided a .plt reloc was 1613 needed for an R_390_PC32 reloc to a non-function sym in 1614 check_relocs. We can't decide accurately between function and 1615 non-function syms in check-relocs; Objects loaded later in 1616 the link may change h->type. So fix it now. */ 1617 h->plt.offset = (bfd_vma) -1; 1618 1619 /* If this is a weak symbol, and there is a real definition, the 1620 processor independent code will have arranged for us to see the 1621 real definition first, and we can just use the same value. */ 1622 if (h->u.weakdef != NULL) 1623 { 1624 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 1625 || h->u.weakdef->root.type == bfd_link_hash_defweak); 1626 h->root.u.def.section = h->u.weakdef->root.u.def.section; 1627 h->root.u.def.value = h->u.weakdef->root.u.def.value; 1628 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) 1629 h->non_got_ref = h->u.weakdef->non_got_ref; 1630 return TRUE; 1631 } 1632 1633 /* This is a reference to a symbol defined by a dynamic object which 1634 is not a function. */ 1635 1636 /* If we are creating a shared library, we must presume that the 1637 only references to the symbol are via the global offset table. 1638 For such cases we need not do anything here; the relocations will 1639 be handled correctly by relocate_section. */ 1640 if (info->shared) 1641 return TRUE; 1642 1643 /* If there are no references to this symbol that do not use the 1644 GOT, we don't need to generate a copy reloc. */ 1645 if (!h->non_got_ref) 1646 return TRUE; 1647 1648 /* If -z nocopyreloc was given, we won't generate them either. */ 1649 if (info->nocopyreloc) 1650 { 1651 h->non_got_ref = 0; 1652 return TRUE; 1653 } 1654 1655 if (ELIMINATE_COPY_RELOCS) 1656 { 1657 struct elf_s390_link_hash_entry * eh; 1658 struct elf_s390_dyn_relocs *p; 1659 1660 eh = (struct elf_s390_link_hash_entry *) h; 1661 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1662 { 1663 s = p->sec->output_section; 1664 if (s != NULL && (s->flags & SEC_READONLY) != 0) 1665 break; 1666 } 1667 1668 /* If we didn't find any dynamic relocs in read-only sections, then 1669 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 1670 if (p == NULL) 1671 { 1672 h->non_got_ref = 0; 1673 return TRUE; 1674 } 1675 } 1676 1677 if (h->size == 0) 1678 { 1679 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), 1680 h->root.root.string); 1681 return TRUE; 1682 } 1683 1684 /* We must allocate the symbol in our .dynbss section, which will 1685 become part of the .bss section of the executable. There will be 1686 an entry for this symbol in the .dynsym section. The dynamic 1687 object will contain position independent code, so all references 1688 from the dynamic object to this symbol will go through the global 1689 offset table. The dynamic linker will use the .dynsym entry to 1690 determine the address it must put in the global offset table, so 1691 both the dynamic object and the regular object will refer to the 1692 same memory location for the variable. */ 1693 1694 htab = elf_s390_hash_table (info); 1695 1696 /* We must generate a R_390_COPY reloc to tell the dynamic linker to 1697 copy the initial value out of the dynamic object and into the 1698 runtime process image. */ 1699 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) 1700 { 1701 htab->srelbss->size += sizeof (Elf32_External_Rela); 1702 h->needs_copy = 1; 1703 } 1704 1705 s = htab->sdynbss; 1706 1707 return _bfd_elf_adjust_dynamic_copy (h, s); 1708} 1709 1710/* Allocate space in .plt, .got and associated reloc sections for 1711 dynamic relocs. */ 1712 1713static bfd_boolean 1714allocate_dynrelocs (h, inf) 1715 struct elf_link_hash_entry *h; 1716 PTR inf; 1717{ 1718 struct bfd_link_info *info; 1719 struct elf_s390_link_hash_table *htab; 1720 struct elf_s390_link_hash_entry *eh; 1721 struct elf_s390_dyn_relocs *p; 1722 1723 if (h->root.type == bfd_link_hash_indirect) 1724 return TRUE; 1725 1726 if (h->root.type == bfd_link_hash_warning) 1727 /* When warning symbols are created, they **replace** the "real" 1728 entry in the hash table, thus we never get to see the real 1729 symbol in a hash traversal. So look at it now. */ 1730 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1731 1732 info = (struct bfd_link_info *) inf; 1733 htab = elf_s390_hash_table (info); 1734 1735 if (htab->elf.dynamic_sections_created 1736 && h->plt.refcount > 0 1737 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1738 || h->root.type != bfd_link_hash_undefweak)) 1739 { 1740 /* Make sure this symbol is output as a dynamic symbol. 1741 Undefined weak syms won't yet be marked as dynamic. */ 1742 if (h->dynindx == -1 1743 && !h->forced_local) 1744 { 1745 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1746 return FALSE; 1747 } 1748 1749 if (info->shared 1750 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) 1751 { 1752 asection *s = htab->splt; 1753 1754 /* If this is the first .plt entry, make room for the special 1755 first entry. */ 1756 if (s->size == 0) 1757 s->size += PLT_FIRST_ENTRY_SIZE; 1758 1759 h->plt.offset = s->size; 1760 1761 /* If this symbol is not defined in a regular file, and we are 1762 not generating a shared library, then set the symbol to this 1763 location in the .plt. This is required to make function 1764 pointers compare as equal between the normal executable and 1765 the shared library. */ 1766 if (! info->shared 1767 && !h->def_regular) 1768 { 1769 h->root.u.def.section = s; 1770 h->root.u.def.value = h->plt.offset; 1771 } 1772 1773 /* Make room for this entry. */ 1774 s->size += PLT_ENTRY_SIZE; 1775 1776 /* We also need to make an entry in the .got.plt section, which 1777 will be placed in the .got section by the linker script. */ 1778 htab->sgotplt->size += GOT_ENTRY_SIZE; 1779 1780 /* We also need to make an entry in the .rela.plt section. */ 1781 htab->srelplt->size += sizeof (Elf32_External_Rela); 1782 } 1783 else 1784 { 1785 h->plt.offset = (bfd_vma) -1; 1786 h->needs_plt = 0; 1787 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1788 } 1789 } 1790 else 1791 { 1792 h->plt.offset = (bfd_vma) -1; 1793 h->needs_plt = 0; 1794 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1795 } 1796 1797 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to 1798 the binary, we can optimize a bit. IE32 and GOTIE32 get converted 1799 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT 1800 we can save the dynamic TLS relocation. */ 1801 if (h->got.refcount > 0 1802 && !info->shared 1803 && h->dynindx == -1 1804 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) 1805 { 1806 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) 1807 /* For the GOTIE access without a literal pool entry the offset has 1808 to be stored somewhere. The immediate value in the instruction 1809 is not bit enough so the value is stored in the got. */ 1810 { 1811 h->got.offset = htab->sgot->size; 1812 htab->sgot->size += GOT_ENTRY_SIZE; 1813 } 1814 else 1815 h->got.offset = (bfd_vma) -1; 1816 } 1817 else if (h->got.refcount > 0) 1818 { 1819 asection *s; 1820 bfd_boolean dyn; 1821 int tls_type = elf_s390_hash_entry(h)->tls_type; 1822 1823 /* Make sure this symbol is output as a dynamic symbol. 1824 Undefined weak syms won't yet be marked as dynamic. */ 1825 if (h->dynindx == -1 1826 && !h->forced_local) 1827 { 1828 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1829 return FALSE; 1830 } 1831 1832 s = htab->sgot; 1833 h->got.offset = s->size; 1834 s->size += GOT_ENTRY_SIZE; 1835 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */ 1836 if (tls_type == GOT_TLS_GD) 1837 s->size += GOT_ENTRY_SIZE; 1838 dyn = htab->elf.dynamic_sections_created; 1839 /* R_390_TLS_IE32 needs one dynamic relocation, 1840 R_390_TLS_GD32 needs one if local symbol and two if global. */ 1841 if ((tls_type == GOT_TLS_GD && h->dynindx == -1) 1842 || tls_type >= GOT_TLS_IE) 1843 htab->srelgot->size += sizeof (Elf32_External_Rela); 1844 else if (tls_type == GOT_TLS_GD) 1845 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela); 1846 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1847 || h->root.type != bfd_link_hash_undefweak) 1848 && (info->shared 1849 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) 1850 htab->srelgot->size += sizeof (Elf32_External_Rela); 1851 } 1852 else 1853 h->got.offset = (bfd_vma) -1; 1854 1855 eh = (struct elf_s390_link_hash_entry *) h; 1856 if (eh->dyn_relocs == NULL) 1857 return TRUE; 1858 1859 /* In the shared -Bsymbolic case, discard space allocated for 1860 dynamic pc-relative relocs against symbols which turn out to be 1861 defined in regular objects. For the normal shared case, discard 1862 space for pc-relative relocs that have become local due to symbol 1863 visibility changes. */ 1864 1865 if (info->shared) 1866 { 1867 if (SYMBOL_REFERENCES_LOCAL (info, h)) 1868 { 1869 struct elf_s390_dyn_relocs **pp; 1870 1871 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 1872 { 1873 p->count -= p->pc_count; 1874 p->pc_count = 0; 1875 if (p->count == 0) 1876 *pp = p->next; 1877 else 1878 pp = &p->next; 1879 } 1880 } 1881 1882 /* Also discard relocs on undefined weak syms with non-default 1883 visibility. */ 1884 if (eh->dyn_relocs != NULL 1885 && h->root.type == bfd_link_hash_undefweak) 1886 { 1887 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 1888 eh->dyn_relocs = NULL; 1889 1890 /* Make sure undefined weak symbols are output as a dynamic 1891 symbol in PIEs. */ 1892 else if (h->dynindx == -1 1893 && !h->forced_local) 1894 { 1895 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1896 return FALSE; 1897 } 1898 } 1899 } 1900 else if (ELIMINATE_COPY_RELOCS) 1901 { 1902 /* For the non-shared case, discard space for relocs against 1903 symbols which turn out to need copy relocs or are not 1904 dynamic. */ 1905 1906 if (!h->non_got_ref 1907 && ((h->def_dynamic 1908 && !h->def_regular) 1909 || (htab->elf.dynamic_sections_created 1910 && (h->root.type == bfd_link_hash_undefweak 1911 || h->root.type == bfd_link_hash_undefined)))) 1912 { 1913 /* Make sure this symbol is output as a dynamic symbol. 1914 Undefined weak syms won't yet be marked as dynamic. */ 1915 if (h->dynindx == -1 1916 && !h->forced_local) 1917 { 1918 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1919 return FALSE; 1920 } 1921 1922 /* If that succeeded, we know we'll be keeping all the 1923 relocs. */ 1924 if (h->dynindx != -1) 1925 goto keep; 1926 } 1927 1928 eh->dyn_relocs = NULL; 1929 1930 keep: ; 1931 } 1932 1933 /* Finally, allocate space. */ 1934 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1935 { 1936 asection *sreloc = elf_section_data (p->sec)->sreloc; 1937 1938 sreloc->size += p->count * sizeof (Elf32_External_Rela); 1939 } 1940 1941 return TRUE; 1942} 1943 1944/* Find any dynamic relocs that apply to read-only sections. */ 1945 1946static bfd_boolean 1947readonly_dynrelocs (h, inf) 1948 struct elf_link_hash_entry *h; 1949 PTR inf; 1950{ 1951 struct elf_s390_link_hash_entry *eh; 1952 struct elf_s390_dyn_relocs *p; 1953 1954 if (h->root.type == bfd_link_hash_warning) 1955 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1956 1957 eh = (struct elf_s390_link_hash_entry *) h; 1958 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1959 { 1960 asection *s = p->sec->output_section; 1961 1962 if (s != NULL && (s->flags & SEC_READONLY) != 0) 1963 { 1964 struct bfd_link_info *info = (struct bfd_link_info *) inf; 1965 1966 info->flags |= DF_TEXTREL; 1967 1968 /* Not an error, just cut short the traversal. */ 1969 return FALSE; 1970 } 1971 } 1972 return TRUE; 1973} 1974 1975/* Set the sizes of the dynamic sections. */ 1976 1977static bfd_boolean 1978elf_s390_size_dynamic_sections (output_bfd, info) 1979 bfd *output_bfd ATTRIBUTE_UNUSED; 1980 struct bfd_link_info *info; 1981{ 1982 struct elf_s390_link_hash_table *htab; 1983 bfd *dynobj; 1984 asection *s; 1985 bfd_boolean relocs; 1986 bfd *ibfd; 1987 1988 htab = elf_s390_hash_table (info); 1989 dynobj = htab->elf.dynobj; 1990 if (dynobj == NULL) 1991 abort (); 1992 1993 if (htab->elf.dynamic_sections_created) 1994 { 1995 /* Set the contents of the .interp section to the interpreter. */ 1996 if (info->executable) 1997 { 1998 s = bfd_get_section_by_name (dynobj, ".interp"); 1999 if (s == NULL) 2000 abort (); 2001 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 2002 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 2003 } 2004 } 2005 2006 /* Set up .got offsets for local syms, and space for local dynamic 2007 relocs. */ 2008 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 2009 { 2010 bfd_signed_vma *local_got; 2011 bfd_signed_vma *end_local_got; 2012 char *local_tls_type; 2013 bfd_size_type locsymcount; 2014 Elf_Internal_Shdr *symtab_hdr; 2015 asection *srela; 2016 2017 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 2018 continue; 2019 2020 for (s = ibfd->sections; s != NULL; s = s->next) 2021 { 2022 struct elf_s390_dyn_relocs *p; 2023 2024 for (p = elf_section_data (s)->local_dynrel; p != NULL; 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->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->size; 2059 s->size += GOT_ENTRY_SIZE; 2060 if (*local_tls_type == GOT_TLS_GD) 2061 s->size += GOT_ENTRY_SIZE; 2062 if (info->shared) 2063 srela->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->size; 2075 htab->sgot->size += 2 * GOT_ENTRY_SIZE; 2076 htab->srelgot->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 || s == htab->sdynbss) 2097 { 2098 /* Strip this section if we don't need it; see the 2099 comment below. */ 2100 } 2101 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) 2102 { 2103 if (s->size != 0) 2104 relocs = TRUE; 2105 2106 /* We use the reloc_count field as a counter if we need 2107 to copy relocs into the output file. */ 2108 s->reloc_count = 0; 2109 } 2110 else 2111 { 2112 /* It's not one of our sections, so don't allocate space. */ 2113 continue; 2114 } 2115 2116 if (s->size == 0) 2117 { 2118 /* If we don't need this section, strip it from the 2119 output file. This is to handle .rela.bss and 2120 .rela.plt. We must create it in 2121 create_dynamic_sections, because it must be created 2122 before the linker maps input sections to output 2123 sections. The linker does that before 2124 adjust_dynamic_symbol is called, and it is that 2125 function which decides whether anything needs to go 2126 into these sections. */ 2127 2128 s->flags |= SEC_EXCLUDE; 2129 continue; 2130 } 2131 2132 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2133 continue; 2134 2135 /* Allocate memory for the section contents. We use bfd_zalloc 2136 here in case unused entries are not reclaimed before the 2137 section's contents are written out. This should not happen, 2138 but this way if it does, we get a R_390_NONE reloc instead 2139 of garbage. */ 2140 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 2141 if (s->contents == NULL) 2142 return FALSE; 2143 } 2144 2145 if (htab->elf.dynamic_sections_created) 2146 { 2147 /* Add some entries to the .dynamic section. We fill in the 2148 values later, in elf_s390_finish_dynamic_sections, but we 2149 must add the entries now so that we get the correct size for 2150 the .dynamic section. The DT_DEBUG entry is filled in by the 2151 dynamic linker and used by the debugger. */ 2152#define add_dynamic_entry(TAG, VAL) \ 2153 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2154 2155 if (info->executable) 2156 { 2157 if (!add_dynamic_entry (DT_DEBUG, 0)) 2158 return FALSE; 2159 } 2160 2161 if (htab->splt->size != 0) 2162 { 2163 if (!add_dynamic_entry (DT_PLTGOT, 0) 2164 || !add_dynamic_entry (DT_PLTRELSZ, 0) 2165 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 2166 || !add_dynamic_entry (DT_JMPREL, 0)) 2167 return FALSE; 2168 } 2169 2170 if (relocs) 2171 { 2172 if (!add_dynamic_entry (DT_RELA, 0) 2173 || !add_dynamic_entry (DT_RELASZ, 0) 2174 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 2175 return FALSE; 2176 2177 /* If any dynamic relocs apply to a read-only section, 2178 then we need a DT_TEXTREL entry. */ 2179 if ((info->flags & DF_TEXTREL) == 0) 2180 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, 2181 (PTR) info); 2182 2183 if ((info->flags & DF_TEXTREL) != 0) 2184 { 2185 if (!add_dynamic_entry (DT_TEXTREL, 0)) 2186 return FALSE; 2187 } 2188 } 2189 } 2190#undef add_dynamic_entry 2191 2192 return TRUE; 2193} 2194 2195/* Return the base VMA address which should be subtracted from real addresses 2196 when resolving @dtpoff relocation. 2197 This is PT_TLS segment p_vaddr. */ 2198 2199static bfd_vma 2200dtpoff_base (info) 2201 struct bfd_link_info *info; 2202{ 2203 /* If tls_sec is NULL, we should have signalled an error already. */ 2204 if (elf_hash_table (info)->tls_sec == NULL) 2205 return 0; 2206 return elf_hash_table (info)->tls_sec->vma; 2207} 2208 2209/* Return the relocation value for @tpoff relocation 2210 if STT_TLS virtual address is ADDRESS. */ 2211 2212static bfd_vma 2213tpoff (info, address) 2214 struct bfd_link_info *info; 2215 bfd_vma address; 2216{ 2217 struct elf_link_hash_table *htab = elf_hash_table (info); 2218 2219 /* If tls_sec is NULL, we should have signalled an error already. */ 2220 if (htab->tls_sec == NULL) 2221 return 0; 2222 return htab->tls_size + htab->tls_sec->vma - address; 2223} 2224 2225/* Complain if TLS instruction relocation is against an invalid 2226 instruction. */ 2227 2228static void 2229invalid_tls_insn (input_bfd, input_section, rel) 2230 bfd *input_bfd; 2231 asection *input_section; 2232 Elf_Internal_Rela *rel; 2233{ 2234 reloc_howto_type *howto; 2235 2236 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info); 2237 (*_bfd_error_handler) 2238 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"), 2239 input_bfd, 2240 input_section, 2241 (long) rel->r_offset, 2242 howto->name); 2243 bfd_set_error (bfd_error_bad_value); 2244} 2245 2246/* Relocate a 390 ELF section. */ 2247 2248static bfd_boolean 2249elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, 2250 contents, relocs, local_syms, local_sections) 2251 bfd *output_bfd; 2252 struct bfd_link_info *info; 2253 bfd *input_bfd; 2254 asection *input_section; 2255 bfd_byte *contents; 2256 Elf_Internal_Rela *relocs; 2257 Elf_Internal_Sym *local_syms; 2258 asection **local_sections; 2259{ 2260 struct elf_s390_link_hash_table *htab; 2261 Elf_Internal_Shdr *symtab_hdr; 2262 struct elf_link_hash_entry **sym_hashes; 2263 bfd_vma *local_got_offsets; 2264 Elf_Internal_Rela *rel; 2265 Elf_Internal_Rela *relend; 2266 2267 htab = elf_s390_hash_table (info); 2268 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 2269 sym_hashes = elf_sym_hashes (input_bfd); 2270 local_got_offsets = elf_local_got_offsets (input_bfd); 2271 2272 rel = relocs; 2273 relend = relocs + input_section->reloc_count; 2274 for (; rel < relend; rel++) 2275 { 2276 unsigned int r_type; 2277 reloc_howto_type *howto; 2278 unsigned long r_symndx; 2279 struct elf_link_hash_entry *h; 2280 Elf_Internal_Sym *sym; 2281 asection *sec; 2282 bfd_vma off; 2283 bfd_vma relocation; 2284 bfd_boolean unresolved_reloc; 2285 bfd_reloc_status_type r; 2286 int tls_type; 2287 2288 r_type = ELF32_R_TYPE (rel->r_info); 2289 if (r_type == (int) R_390_GNU_VTINHERIT 2290 || r_type == (int) R_390_GNU_VTENTRY) 2291 continue; 2292 if (r_type >= (int) R_390_max) 2293 { 2294 bfd_set_error (bfd_error_bad_value); 2295 return FALSE; 2296 } 2297 2298 howto = elf_howto_table + r_type; 2299 r_symndx = ELF32_R_SYM (rel->r_info); 2300 2301 h = NULL; 2302 sym = NULL; 2303 sec = NULL; 2304 unresolved_reloc = FALSE; 2305 if (r_symndx < symtab_hdr->sh_info) 2306 { 2307 sym = local_syms + r_symndx; 2308 sec = local_sections[r_symndx]; 2309 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2310 } 2311 else 2312 { 2313 bfd_boolean warned ATTRIBUTE_UNUSED; 2314 2315 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 2316 r_symndx, symtab_hdr, sym_hashes, 2317 h, sec, relocation, 2318 unresolved_reloc, warned); 2319 } 2320 2321 if (sec != NULL && elf_discarded_section (sec)) 2322 { 2323 /* For relocs against symbols from removed linkonce sections, 2324 or sections discarded by a linker script, we just want the 2325 section contents zeroed. Avoid any special processing. */ 2326 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); 2327 rel->r_info = 0; 2328 rel->r_addend = 0; 2329 continue; 2330 } 2331 2332 if (info->relocatable) 2333 continue; 2334 2335 switch (r_type) 2336 { 2337 case R_390_GOTPLT12: 2338 case R_390_GOTPLT16: 2339 case R_390_GOTPLT20: 2340 case R_390_GOTPLT32: 2341 case R_390_GOTPLTENT: 2342 /* There are three cases for a GOTPLT relocation. 1) The 2343 relocation is against the jump slot entry of a plt that 2344 will get emitted to the output file. 2) The relocation 2345 is against the jump slot of a plt entry that has been 2346 removed. elf_s390_adjust_gotplt has created a GOT entry 2347 as replacement. 3) The relocation is against a local symbol. 2348 Cases 2) and 3) are the same as the GOT relocation code 2349 so we just have to test for case 1 and fall through for 2350 the other two. */ 2351 if (h != NULL && h->plt.offset != (bfd_vma) -1) 2352 { 2353 bfd_vma plt_index; 2354 2355 /* Calc. index no. 2356 Current offset - size first entry / entry size. */ 2357 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / 2358 PLT_ENTRY_SIZE; 2359 2360 /* Offset in GOT is PLT index plus GOT headers(3) times 4, 2361 addr & GOT addr. */ 2362 relocation = (plt_index + 3) * GOT_ENTRY_SIZE; 2363 unresolved_reloc = FALSE; 2364 2365 if (r_type == R_390_GOTPLTENT) 2366 relocation += htab->sgot->output_section->vma; 2367 break; 2368 } 2369 /* Fall through. */ 2370 2371 case R_390_GOT12: 2372 case R_390_GOT16: 2373 case R_390_GOT20: 2374 case R_390_GOT32: 2375 case R_390_GOTENT: 2376 /* Relocation is to the entry for this symbol in the global 2377 offset table. */ 2378 if (htab->sgot == NULL) 2379 abort (); 2380 2381 if (h != NULL) 2382 { 2383 bfd_boolean dyn; 2384 2385 off = h->got.offset; 2386 dyn = htab->elf.dynamic_sections_created; 2387 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 2388 || (info->shared 2389 && (info->symbolic 2390 || h->dynindx == -1 2391 || h->forced_local) 2392 && h->def_regular) 2393 || (ELF_ST_VISIBILITY (h->other) 2394 && h->root.type == bfd_link_hash_undefweak)) 2395 { 2396 /* This is actually a static link, or it is a 2397 -Bsymbolic link and the symbol is defined 2398 locally, or the symbol was forced to be local 2399 because of a version file. We must initialize 2400 this entry in the global offset table. Since the 2401 offset must always be a multiple of 2, we use the 2402 least significant bit to record whether we have 2403 initialized it already. 2404 2405 When doing a dynamic link, we create a .rel.got 2406 relocation entry to initialize the value. This 2407 is done in the finish_dynamic_symbol routine. */ 2408 if ((off & 1) != 0) 2409 off &= ~1; 2410 else 2411 { 2412 bfd_put_32 (output_bfd, relocation, 2413 htab->sgot->contents + off); 2414 h->got.offset |= 1; 2415 } 2416 } 2417 else 2418 unresolved_reloc = FALSE; 2419 } 2420 else 2421 { 2422 if (local_got_offsets == NULL) 2423 abort (); 2424 2425 off = local_got_offsets[r_symndx]; 2426 2427 /* The offset must always be a multiple of 4. We use 2428 the least significant bit to record whether we have 2429 already generated the necessary reloc. */ 2430 if ((off & 1) != 0) 2431 off &= ~1; 2432 else 2433 { 2434 bfd_put_32 (output_bfd, relocation, 2435 htab->sgot->contents + off); 2436 2437 if (info->shared) 2438 { 2439 asection *srelgot; 2440 Elf_Internal_Rela outrel; 2441 bfd_byte *loc; 2442 2443 srelgot = htab->srelgot; 2444 if (srelgot == NULL) 2445 abort (); 2446 2447 outrel.r_offset = (htab->sgot->output_section->vma 2448 + htab->sgot->output_offset 2449 + off); 2450 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 2451 outrel.r_addend = relocation; 2452 loc = srelgot->contents; 2453 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 2454 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2455 } 2456 2457 local_got_offsets[r_symndx] |= 1; 2458 } 2459 } 2460 2461 if (off >= (bfd_vma) -2) 2462 abort (); 2463 2464 relocation = htab->sgot->output_offset + off; 2465 2466 /* For @GOTENT the relocation is against the offset between 2467 the instruction and the symbols entry in the GOT and not 2468 between the start of the GOT and the symbols entry. We 2469 add the vma of the GOT to get the correct value. */ 2470 if ( r_type == R_390_GOTENT 2471 || r_type == R_390_GOTPLTENT) 2472 relocation += htab->sgot->output_section->vma; 2473 2474 break; 2475 2476 case R_390_GOTOFF16: 2477 case R_390_GOTOFF32: 2478 /* Relocation is relative to the start of the global offset 2479 table. */ 2480 2481 /* Note that sgot->output_offset is not involved in this 2482 calculation. We always want the start of .got. If we 2483 defined _GLOBAL_OFFSET_TABLE in a different way, as is 2484 permitted by the ABI, we might have to change this 2485 calculation. */ 2486 relocation -= htab->sgot->output_section->vma; 2487 break; 2488 2489 case R_390_GOTPC: 2490 case R_390_GOTPCDBL: 2491 /* Use global offset table as symbol value. */ 2492 relocation = htab->sgot->output_section->vma; 2493 unresolved_reloc = FALSE; 2494 break; 2495 2496 case R_390_PLT16DBL: 2497 case R_390_PLT32DBL: 2498 case R_390_PLT32: 2499 /* Relocation is to the entry for this symbol in the 2500 procedure linkage table. */ 2501 2502 /* Resolve a PLT32 reloc against a local symbol directly, 2503 without using the procedure linkage table. */ 2504 if (h == NULL) 2505 break; 2506 2507 if (h->plt.offset == (bfd_vma) -1 2508 || htab->splt == NULL) 2509 { 2510 /* We didn't make a PLT entry for this symbol. This 2511 happens when statically linking PIC code, or when 2512 using -Bsymbolic. */ 2513 break; 2514 } 2515 2516 relocation = (htab->splt->output_section->vma 2517 + htab->splt->output_offset 2518 + h->plt.offset); 2519 unresolved_reloc = FALSE; 2520 break; 2521 2522 case R_390_PLTOFF16: 2523 case R_390_PLTOFF32: 2524 /* Relocation is to the entry for this symbol in the 2525 procedure linkage table relative to the start of the GOT. */ 2526 2527 /* For local symbols or if we didn't make a PLT entry for 2528 this symbol resolve the symbol directly. */ 2529 if ( h == NULL 2530 || h->plt.offset == (bfd_vma) -1 2531 || htab->splt == NULL) 2532 { 2533 relocation -= htab->sgot->output_section->vma; 2534 break; 2535 } 2536 2537 relocation = (htab->splt->output_section->vma 2538 + htab->splt->output_offset 2539 + h->plt.offset 2540 - htab->sgot->output_section->vma); 2541 unresolved_reloc = FALSE; 2542 break; 2543 2544 case R_390_8: 2545 case R_390_16: 2546 case R_390_32: 2547 case R_390_PC16: 2548 case R_390_PC16DBL: 2549 case R_390_PC32DBL: 2550 case R_390_PC32: 2551 if ((input_section->flags & SEC_ALLOC) == 0) 2552 break; 2553 2554 if ((info->shared 2555 && (h == NULL 2556 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 2557 || h->root.type != bfd_link_hash_undefweak) 2558 && ((r_type != R_390_PC16 2559 && r_type != R_390_PC16DBL 2560 && r_type != R_390_PC32DBL 2561 && r_type != R_390_PC32) 2562 || (h != NULL 2563 && !SYMBOL_REFERENCES_LOCAL (info, h)))) 2564 || (ELIMINATE_COPY_RELOCS 2565 && !info->shared 2566 && h != NULL 2567 && h->dynindx != -1 2568 && !h->non_got_ref 2569 && ((h->def_dynamic 2570 && !h->def_regular) 2571 || h->root.type == bfd_link_hash_undefweak 2572 || h->root.type == bfd_link_hash_undefined))) 2573 { 2574 Elf_Internal_Rela outrel; 2575 bfd_boolean skip, relocate; 2576 asection *sreloc; 2577 bfd_byte *loc; 2578 2579 /* When generating a shared object, these relocations 2580 are copied into the output file to be resolved at run 2581 time. */ 2582 2583 skip = FALSE; 2584 relocate = FALSE; 2585 2586 outrel.r_offset = 2587 _bfd_elf_section_offset (output_bfd, info, input_section, 2588 rel->r_offset); 2589 if (outrel.r_offset == (bfd_vma) -1) 2590 skip = TRUE; 2591 else if (outrel.r_offset == (bfd_vma) -2) 2592 skip = TRUE, relocate = TRUE; 2593 outrel.r_offset += (input_section->output_section->vma 2594 + input_section->output_offset); 2595 2596 if (skip) 2597 memset (&outrel, 0, sizeof outrel); 2598 else if (h != NULL 2599 && h->dynindx != -1 2600 && (r_type == R_390_PC16 2601 || r_type == R_390_PC16DBL 2602 || r_type == R_390_PC32DBL 2603 || r_type == R_390_PC32 2604 || !info->shared 2605 || !info->symbolic 2606 || !h->def_regular)) 2607 { 2608 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 2609 outrel.r_addend = rel->r_addend; 2610 } 2611 else 2612 { 2613 /* This symbol is local, or marked to become local. */ 2614 outrel.r_addend = relocation + rel->r_addend; 2615 if (r_type == R_390_32) 2616 { 2617 relocate = TRUE; 2618 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 2619 } 2620 else 2621 { 2622 long sindx; 2623 2624 if (bfd_is_abs_section (sec)) 2625 sindx = 0; 2626 else if (sec == NULL || sec->owner == NULL) 2627 { 2628 bfd_set_error(bfd_error_bad_value); 2629 return FALSE; 2630 } 2631 else 2632 { 2633 asection *osec; 2634 2635 osec = sec->output_section; 2636 sindx = elf_section_data (osec)->dynindx; 2637 if (sindx == 0) 2638 { 2639 osec = htab->elf.text_index_section; 2640 sindx = elf_section_data (osec)->dynindx; 2641 } 2642 BFD_ASSERT (sindx != 0); 2643 2644 /* We are turning this relocation into one 2645 against a section symbol, so subtract out 2646 the output section's address but not the 2647 offset of the input section in the output 2648 section. */ 2649 outrel.r_addend -= osec->vma; 2650 } 2651 outrel.r_info = ELF32_R_INFO (sindx, r_type); 2652 } 2653 } 2654 2655 sreloc = elf_section_data (input_section)->sreloc; 2656 if (sreloc == NULL) 2657 abort (); 2658 2659 loc = sreloc->contents; 2660 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 2661 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2662 2663 /* If this reloc is against an external symbol, we do 2664 not want to fiddle with the addend. Otherwise, we 2665 need to include the symbol value so that it becomes 2666 an addend for the dynamic reloc. */ 2667 if (! relocate) 2668 continue; 2669 } 2670 break; 2671 2672 /* Relocations for tls literal pool entries. */ 2673 case R_390_TLS_IE32: 2674 if (info->shared) 2675 { 2676 Elf_Internal_Rela outrel; 2677 asection *sreloc; 2678 bfd_byte *loc; 2679 2680 outrel.r_offset = rel->r_offset 2681 + input_section->output_section->vma 2682 + input_section->output_offset; 2683 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 2684 sreloc = elf_section_data (input_section)->sreloc; 2685 if (sreloc == NULL) 2686 abort (); 2687 loc = sreloc->contents; 2688 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 2689 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); 2690 } 2691 /* Fall through. */ 2692 2693 case R_390_TLS_GD32: 2694 case R_390_TLS_GOTIE32: 2695 r_type = elf_s390_tls_transition (info, r_type, h == NULL); 2696 tls_type = GOT_UNKNOWN; 2697 if (h == NULL && local_got_offsets) 2698 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 2699 else if (h != NULL) 2700 { 2701 tls_type = elf_s390_hash_entry(h)->tls_type; 2702 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) 2703 r_type = R_390_TLS_LE32; 2704 } 2705 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE) 2706 r_type = R_390_TLS_IE32; 2707 2708 if (r_type == R_390_TLS_LE32) 2709 { 2710 /* This relocation gets optimized away by the local exec 2711 access optimization. */ 2712 BFD_ASSERT (! unresolved_reloc); 2713 bfd_put_32 (output_bfd, -tpoff (info, relocation), 2714 contents + rel->r_offset); 2715 continue; 2716 } 2717 2718 if (htab->sgot == NULL) 2719 abort (); 2720 2721 if (h != NULL) 2722 off = h->got.offset; 2723 else 2724 { 2725 if (local_got_offsets == NULL) 2726 abort (); 2727 2728 off = local_got_offsets[r_symndx]; 2729 } 2730 2731 emit_tls_relocs: 2732 2733 if ((off & 1) != 0) 2734 off &= ~1; 2735 else 2736 { 2737 Elf_Internal_Rela outrel; 2738 bfd_byte *loc; 2739 int dr_type, indx; 2740 2741 if (htab->srelgot == NULL) 2742 abort (); 2743 2744 outrel.r_offset = (htab->sgot->output_section->vma 2745 + htab->sgot->output_offset + off); 2746 2747 indx = h && h->dynindx != -1 ? h->dynindx : 0; 2748 if (r_type == R_390_TLS_GD32) 2749 dr_type = R_390_TLS_DTPMOD; 2750 else 2751 dr_type = R_390_TLS_TPOFF; 2752 if (dr_type == R_390_TLS_TPOFF && indx == 0) 2753 outrel.r_addend = relocation - dtpoff_base (info); 2754 else 2755 outrel.r_addend = 0; 2756 outrel.r_info = ELF32_R_INFO (indx, dr_type); 2757 loc = htab->srelgot->contents; 2758 loc += htab->srelgot->reloc_count++ 2759 * sizeof (Elf32_External_Rela); 2760 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2761 2762 if (r_type == R_390_TLS_GD32) 2763 { 2764 if (indx == 0) 2765 { 2766 BFD_ASSERT (! unresolved_reloc); 2767 bfd_put_32 (output_bfd, 2768 relocation - dtpoff_base (info), 2769 htab->sgot->contents + off + GOT_ENTRY_SIZE); 2770 } 2771 else 2772 { 2773 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF); 2774 outrel.r_offset += GOT_ENTRY_SIZE; 2775 outrel.r_addend = 0; 2776 htab->srelgot->reloc_count++; 2777 loc += sizeof (Elf32_External_Rela); 2778 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2779 } 2780 } 2781 2782 if (h != NULL) 2783 h->got.offset |= 1; 2784 else 2785 local_got_offsets[r_symndx] |= 1; 2786 } 2787 2788 if (off >= (bfd_vma) -2) 2789 abort (); 2790 if (r_type == ELF32_R_TYPE (rel->r_info)) 2791 { 2792 relocation = htab->sgot->output_offset + off; 2793 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT) 2794 relocation += htab->sgot->output_section->vma; 2795 unresolved_reloc = FALSE; 2796 } 2797 else 2798 { 2799 bfd_put_32 (output_bfd, htab->sgot->output_offset + off, 2800 contents + rel->r_offset); 2801 continue; 2802 } 2803 break; 2804 2805 case R_390_TLS_GOTIE12: 2806 case R_390_TLS_GOTIE20: 2807 case R_390_TLS_IEENT: 2808 if (h == NULL) 2809 { 2810 if (local_got_offsets == NULL) 2811 abort(); 2812 off = local_got_offsets[r_symndx]; 2813 if (info->shared) 2814 goto emit_tls_relocs; 2815 } 2816 else 2817 { 2818 off = h->got.offset; 2819 tls_type = elf_s390_hash_entry(h)->tls_type; 2820 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) 2821 goto emit_tls_relocs; 2822 } 2823 2824 if (htab->sgot == NULL) 2825 abort (); 2826 2827 BFD_ASSERT (! unresolved_reloc); 2828 bfd_put_32 (output_bfd, -tpoff (info, relocation), 2829 htab->sgot->contents + off); 2830 relocation = htab->sgot->output_offset + off; 2831 if (r_type == R_390_TLS_IEENT) 2832 relocation += htab->sgot->output_section->vma; 2833 unresolved_reloc = FALSE; 2834 break; 2835 2836 case R_390_TLS_LDM32: 2837 if (! info->shared) 2838 /* The literal pool entry this relocation refers to gets ignored 2839 by the optimized code of the local exec model. Do nothing 2840 and the value will turn out zero. */ 2841 continue; 2842 2843 if (htab->sgot == NULL) 2844 abort (); 2845 2846 off = htab->tls_ldm_got.offset; 2847 if (off & 1) 2848 off &= ~1; 2849 else 2850 { 2851 Elf_Internal_Rela outrel; 2852 bfd_byte *loc; 2853 2854 if (htab->srelgot == NULL) 2855 abort (); 2856 2857 outrel.r_offset = (htab->sgot->output_section->vma 2858 + htab->sgot->output_offset + off); 2859 2860 bfd_put_32 (output_bfd, 0, 2861 htab->sgot->contents + off + GOT_ENTRY_SIZE); 2862 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD); 2863 outrel.r_addend = 0; 2864 loc = htab->srelgot->contents; 2865 loc += htab->srelgot->reloc_count++ 2866 * sizeof (Elf32_External_Rela); 2867 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2868 htab->tls_ldm_got.offset |= 1; 2869 } 2870 relocation = htab->sgot->output_offset + off; 2871 unresolved_reloc = FALSE; 2872 break; 2873 2874 case R_390_TLS_LE32: 2875 if (info->shared) 2876 { 2877 /* Linking a shared library with non-fpic code requires 2878 a R_390_TLS_TPOFF relocation. */ 2879 Elf_Internal_Rela outrel; 2880 asection *sreloc; 2881 bfd_byte *loc; 2882 int indx; 2883 2884 outrel.r_offset = rel->r_offset 2885 + input_section->output_section->vma 2886 + input_section->output_offset; 2887 if (h != NULL && h->dynindx != -1) 2888 indx = h->dynindx; 2889 else 2890 indx = 0; 2891 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF); 2892 if (indx == 0) 2893 outrel.r_addend = relocation - dtpoff_base (info); 2894 else 2895 outrel.r_addend = 0; 2896 sreloc = elf_section_data (input_section)->sreloc; 2897 if (sreloc == NULL) 2898 abort (); 2899 loc = sreloc->contents; 2900 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 2901 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2902 } 2903 else 2904 { 2905 BFD_ASSERT (! unresolved_reloc); 2906 bfd_put_32 (output_bfd, -tpoff (info, relocation), 2907 contents + rel->r_offset); 2908 } 2909 continue; 2910 2911 case R_390_TLS_LDO32: 2912 if (info->shared) 2913 relocation -= dtpoff_base (info); 2914 else 2915 /* When converting LDO to LE, we must negate. */ 2916 relocation = -tpoff (info, relocation); 2917 break; 2918 2919 /* Relocations for tls instructions. */ 2920 case R_390_TLS_LOAD: 2921 case R_390_TLS_GDCALL: 2922 case R_390_TLS_LDCALL: 2923 tls_type = GOT_UNKNOWN; 2924 if (h == NULL && local_got_offsets) 2925 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 2926 else if (h != NULL) 2927 tls_type = elf_s390_hash_entry(h)->tls_type; 2928 2929 if (tls_type == GOT_TLS_GD) 2930 continue; 2931 2932 if (r_type == R_390_TLS_LOAD) 2933 { 2934 if (!info->shared && (h == NULL || h->dynindx == -1)) 2935 { 2936 /* IE->LE transition. Four valid cases: 2937 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 2938 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 2939 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 2940 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ 2941 unsigned int insn, ry; 2942 2943 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 2944 ry = 0; 2945 if ((insn & 0xff00f000) == 0x58000000) 2946 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */ 2947 ry = (insn & 0x000f0000); 2948 else if ((insn & 0xff0f0000) == 0x58000000) 2949 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */ 2950 ry = (insn & 0x0000f000) << 4; 2951 else if ((insn & 0xff00f000) == 0x5800c000) 2952 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */ 2953 ry = (insn & 0x000f0000); 2954 else if ((insn & 0xff0f0000) == 0x580c0000) 2955 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ 2956 ry = (insn & 0x0000f000) << 4; 2957 else 2958 invalid_tls_insn (input_bfd, input_section, rel); 2959 insn = 0x18000700 | (insn & 0x00f00000) | ry; 2960 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 2961 } 2962 } 2963 else if (r_type == R_390_TLS_GDCALL) 2964 { 2965 unsigned int insn; 2966 2967 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 2968 if ((insn & 0xff000fff) != 0x4d000000 && 2969 (insn & 0xffff0000) != 0xc0e50000) 2970 invalid_tls_insn (input_bfd, input_section, rel); 2971 if (!info->shared && (h == NULL || h->dynindx == -1)) 2972 { 2973 if ((insn & 0xff000000) == 0x4d000000) 2974 { 2975 /* GD->LE transition. 2976 bas %r14,0(%rx,%r13) -> bc 0,0 */ 2977 insn = 0x47000000; 2978 } 2979 else 2980 { 2981 /* GD->LE transition. 2982 brasl %r14,_tls_get_addr@plt -> brcl 0,. */ 2983 insn = 0xc0040000; 2984 bfd_put_16 (output_bfd, 0x0000, 2985 contents + rel->r_offset + 4); 2986 } 2987 } 2988 else 2989 { 2990 if ((insn & 0xff000000) == 0x4d000000) 2991 { 2992 /* GD->IE transition. 2993 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */ 2994 insn = 0x5822c000; 2995 } 2996 else 2997 { 2998 /* GD->IE transition. 2999 brasl %r14,__tls_get_addr@plt -> 3000 l %r2,0(%r2,%r12) ; bcr 0,0 */ 3001 insn = 0x5822c000; 3002 bfd_put_16 (output_bfd, 0x0700, 3003 contents + rel->r_offset + 4); 3004 } 3005 } 3006 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 3007 } 3008 else if (r_type == R_390_TLS_LDCALL) 3009 { 3010 if (!info->shared) 3011 { 3012 unsigned int insn; 3013 3014 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 3015 if ((insn & 0xff000fff) != 0x4d000000 && 3016 (insn & 0xffff0000) != 0xc0e50000) 3017 invalid_tls_insn (input_bfd, input_section, rel); 3018 if ((insn & 0xff000000) == 0x4d000000) 3019 { 3020 /* LD->LE transition. 3021 bas %r14,0(%rx,%r13) -> bc 0,0 */ 3022 insn = 0x47000000; 3023 } 3024 else 3025 { 3026 /* LD->LE transition. 3027 brasl %r14,__tls_get_addr@plt -> brcl 0,. */ 3028 insn = 0xc0040000; 3029 bfd_put_16 (output_bfd, 0x0000, 3030 contents + rel->r_offset + 4); 3031 } 3032 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 3033 } 3034 } 3035 continue; 3036 3037 default: 3038 break; 3039 } 3040 3041 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections 3042 because such sections are not SEC_ALLOC and thus ld.so will 3043 not process them. */ 3044 if (unresolved_reloc 3045 && !((input_section->flags & SEC_DEBUGGING) != 0 3046 && h->def_dynamic)) 3047 (*_bfd_error_handler) 3048 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), 3049 input_bfd, 3050 input_section, 3051 (long) rel->r_offset, 3052 howto->name, 3053 h->root.root.string); 3054 3055 if (r_type == R_390_20 3056 || r_type == R_390_GOT20 3057 || r_type == R_390_GOTPLT20 3058 || r_type == R_390_TLS_GOTIE20) 3059 { 3060 relocation += rel->r_addend; 3061 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; 3062 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3063 contents, rel->r_offset, 3064 relocation, 0); 3065 } 3066 else 3067 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3068 contents, rel->r_offset, 3069 relocation, rel->r_addend); 3070 3071 if (r != bfd_reloc_ok) 3072 { 3073 const char *name; 3074 3075 if (h != NULL) 3076 name = h->root.root.string; 3077 else 3078 { 3079 name = bfd_elf_string_from_elf_section (input_bfd, 3080 symtab_hdr->sh_link, 3081 sym->st_name); 3082 if (name == NULL) 3083 return FALSE; 3084 if (*name == '\0') 3085 name = bfd_section_name (input_bfd, sec); 3086 } 3087 3088 if (r == bfd_reloc_overflow) 3089 { 3090 3091 if (! ((*info->callbacks->reloc_overflow) 3092 (info, (h ? &h->root : NULL), name, howto->name, 3093 (bfd_vma) 0, input_bfd, input_section, 3094 rel->r_offset))) 3095 return FALSE; 3096 } 3097 else 3098 { 3099 (*_bfd_error_handler) 3100 (_("%B(%A+0x%lx): reloc against `%s': error %d"), 3101 input_bfd, input_section, 3102 (long) rel->r_offset, name, (int) r); 3103 return FALSE; 3104 } 3105 } 3106 } 3107 3108 return TRUE; 3109} 3110 3111/* Finish up dynamic symbol handling. We set the contents of various 3112 dynamic sections here. */ 3113 3114static bfd_boolean 3115elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) 3116 bfd *output_bfd; 3117 struct bfd_link_info *info; 3118 struct elf_link_hash_entry *h; 3119 Elf_Internal_Sym *sym; 3120{ 3121 struct elf_s390_link_hash_table *htab; 3122 3123 htab = elf_s390_hash_table (info); 3124 3125 if (h->plt.offset != (bfd_vma) -1) 3126 { 3127 bfd_vma plt_index; 3128 bfd_vma got_offset; 3129 Elf_Internal_Rela rela; 3130 bfd_byte *loc; 3131 bfd_vma relative_offset; 3132 3133 /* This symbol has an entry in the procedure linkage table. Set 3134 it up. */ 3135 if (h->dynindx == -1 3136 || htab->splt == NULL 3137 || htab->sgotplt == NULL 3138 || htab->srelplt == NULL) 3139 abort (); 3140 3141 /* Calc. index no. 3142 Current offset - size first entry / entry size. */ 3143 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; 3144 3145 /* Offset in GOT is PLT index plus GOT headers(3) times 4, 3146 addr & GOT addr. */ 3147 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; 3148 3149 /* S390 uses halfwords for relative branch calc! */ 3150 relative_offset = - ((PLT_FIRST_ENTRY_SIZE + 3151 (PLT_ENTRY_SIZE * plt_index) + 18) / 2); 3152 /* If offset is > 32768, branch to a previous branch 3153 390 can only handle +-64 K jumps. */ 3154 if ( -32768 > (int) relative_offset ) 3155 relative_offset 3156 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2); 3157 3158 /* Fill in the entry in the procedure linkage table. */ 3159 if (!info->shared) 3160 { 3161 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0, 3162 htab->splt->contents + h->plt.offset); 3163 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1, 3164 htab->splt->contents + h->plt.offset + 4); 3165 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2, 3166 htab->splt->contents + h->plt.offset + 8); 3167 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3, 3168 htab->splt->contents + h->plt.offset + 12); 3169 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4, 3170 htab->splt->contents + h->plt.offset + 16); 3171 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3172 htab->splt->contents + h->plt.offset + 20); 3173 bfd_put_32 (output_bfd, 3174 (htab->sgotplt->output_section->vma 3175 + htab->sgotplt->output_offset 3176 + got_offset), 3177 htab->splt->contents + h->plt.offset + 24); 3178 } 3179 else if (got_offset < 4096) 3180 { 3181 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset, 3182 htab->splt->contents + h->plt.offset); 3183 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1, 3184 htab->splt->contents + h->plt.offset + 4); 3185 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2, 3186 htab->splt->contents + h->plt.offset + 8); 3187 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3, 3188 htab->splt->contents + h->plt.offset + 12); 3189 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4, 3190 htab->splt->contents + h->plt.offset + 16); 3191 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3192 htab->splt->contents + h->plt.offset + 20); 3193 bfd_put_32 (output_bfd, (bfd_vma) 0, 3194 htab->splt->contents + h->plt.offset + 24); 3195 } 3196 else if (got_offset < 32768) 3197 { 3198 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset, 3199 htab->splt->contents + h->plt.offset); 3200 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1, 3201 htab->splt->contents + h->plt.offset + 4); 3202 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2, 3203 htab->splt->contents + h->plt.offset + 8); 3204 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3, 3205 htab->splt->contents + h->plt.offset + 12); 3206 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4, 3207 htab->splt->contents + h->plt.offset + 16); 3208 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3209 htab->splt->contents + h->plt.offset + 20); 3210 bfd_put_32 (output_bfd, (bfd_vma) 0, 3211 htab->splt->contents + h->plt.offset + 24); 3212 } 3213 else 3214 { 3215 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0, 3216 htab->splt->contents + h->plt.offset); 3217 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1, 3218 htab->splt->contents + h->plt.offset + 4); 3219 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2, 3220 htab->splt->contents + h->plt.offset + 8); 3221 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3, 3222 htab->splt->contents + h->plt.offset + 12); 3223 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4, 3224 htab->splt->contents + h->plt.offset + 16); 3225 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3226 htab->splt->contents + h->plt.offset + 20); 3227 bfd_put_32 (output_bfd, got_offset, 3228 htab->splt->contents + h->plt.offset + 24); 3229 } 3230 /* Insert offset into reloc. table here. */ 3231 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), 3232 htab->splt->contents + h->plt.offset + 28); 3233 3234 /* Fill in the entry in the global offset table. 3235 Points to instruction after GOT offset. */ 3236 bfd_put_32 (output_bfd, 3237 (htab->splt->output_section->vma 3238 + htab->splt->output_offset 3239 + h->plt.offset 3240 + 12), 3241 htab->sgotplt->contents + got_offset); 3242 3243 /* Fill in the entry in the .rela.plt section. */ 3244 rela.r_offset = (htab->sgotplt->output_section->vma 3245 + htab->sgotplt->output_offset 3246 + got_offset); 3247 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT); 3248 rela.r_addend = 0; 3249 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela); 3250 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3251 3252 if (!h->def_regular) 3253 { 3254 /* Mark the symbol as undefined, rather than as defined in 3255 the .plt section. Leave the value alone. This is a clue 3256 for the dynamic linker, to make function pointer 3257 comparisons work between an application and shared 3258 library. */ 3259 sym->st_shndx = SHN_UNDEF; 3260 } 3261 } 3262 3263 if (h->got.offset != (bfd_vma) -1 3264 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD 3265 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE 3266 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) 3267 { 3268 Elf_Internal_Rela rela; 3269 bfd_byte *loc; 3270 3271 /* This symbol has an entry in the global offset table. Set it 3272 up. */ 3273 3274 if (htab->sgot == NULL || htab->srelgot == NULL) 3275 abort (); 3276 3277 rela.r_offset = (htab->sgot->output_section->vma 3278 + htab->sgot->output_offset 3279 + (h->got.offset &~ (bfd_vma) 1)); 3280 3281 /* If this is a static link, or it is a -Bsymbolic link and the 3282 symbol is defined locally or was forced to be local because 3283 of a version file, we just want to emit a RELATIVE reloc. 3284 The entry in the global offset table will already have been 3285 initialized in the relocate_section function. */ 3286 if (info->shared 3287 && (info->symbolic 3288 || h->dynindx == -1 3289 || h->forced_local) 3290 && h->def_regular) 3291 { 3292 BFD_ASSERT((h->got.offset & 1) != 0); 3293 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 3294 rela.r_addend = (h->root.u.def.value 3295 + h->root.u.def.section->output_section->vma 3296 + h->root.u.def.section->output_offset); 3297 } 3298 else 3299 { 3300 BFD_ASSERT((h->got.offset & 1) == 0); 3301 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset); 3302 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT); 3303 rela.r_addend = 0; 3304 } 3305 3306 loc = htab->srelgot->contents; 3307 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 3308 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3309 } 3310 3311 if (h->needs_copy) 3312 { 3313 Elf_Internal_Rela rela; 3314 bfd_byte *loc; 3315 3316 /* This symbols needs a copy reloc. Set it up. */ 3317 3318 if (h->dynindx == -1 3319 || (h->root.type != bfd_link_hash_defined 3320 && h->root.type != bfd_link_hash_defweak) 3321 || htab->srelbss == NULL) 3322 abort (); 3323 3324 rela.r_offset = (h->root.u.def.value 3325 + h->root.u.def.section->output_section->vma 3326 + h->root.u.def.section->output_offset); 3327 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY); 3328 rela.r_addend = 0; 3329 loc = htab->srelbss->contents; 3330 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela); 3331 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3332 } 3333 3334 /* Mark some specially defined symbols as absolute. */ 3335 if (strcmp (h->root.root.string, "_DYNAMIC") == 0 3336 || h == htab->elf.hgot 3337 || h == htab->elf.hplt) 3338 sym->st_shndx = SHN_ABS; 3339 3340 return TRUE; 3341} 3342 3343/* Used to decide how to sort relocs in an optimal manner for the 3344 dynamic linker, before writing them out. */ 3345 3346static enum elf_reloc_type_class 3347elf_s390_reloc_type_class (rela) 3348 const Elf_Internal_Rela *rela; 3349{ 3350 switch ((int) ELF32_R_TYPE (rela->r_info)) 3351 { 3352 case R_390_RELATIVE: 3353 return reloc_class_relative; 3354 case R_390_JMP_SLOT: 3355 return reloc_class_plt; 3356 case R_390_COPY: 3357 return reloc_class_copy; 3358 default: 3359 return reloc_class_normal; 3360 } 3361} 3362 3363/* Finish up the dynamic sections. */ 3364 3365static bfd_boolean 3366elf_s390_finish_dynamic_sections (output_bfd, info) 3367 bfd *output_bfd; 3368 struct bfd_link_info *info; 3369{ 3370 struct elf_s390_link_hash_table *htab; 3371 bfd *dynobj; 3372 asection *sdyn; 3373 3374 htab = elf_s390_hash_table (info); 3375 dynobj = htab->elf.dynobj; 3376 sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); 3377 3378 if (htab->elf.dynamic_sections_created) 3379 { 3380 Elf32_External_Dyn *dyncon, *dynconend; 3381 3382 if (sdyn == NULL || htab->sgot == NULL) 3383 abort (); 3384 3385 dyncon = (Elf32_External_Dyn *) sdyn->contents; 3386 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 3387 for (; dyncon < dynconend; dyncon++) 3388 { 3389 Elf_Internal_Dyn dyn; 3390 asection *s; 3391 3392 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 3393 3394 switch (dyn.d_tag) 3395 { 3396 default: 3397 continue; 3398 3399 case DT_PLTGOT: 3400 dyn.d_un.d_ptr = htab->sgot->output_section->vma; 3401 break; 3402 3403 case DT_JMPREL: 3404 dyn.d_un.d_ptr = htab->srelplt->output_section->vma; 3405 break; 3406 3407 case DT_PLTRELSZ: 3408 s = htab->srelplt->output_section; 3409 dyn.d_un.d_val = s->size; 3410 break; 3411 } 3412 3413 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3414 } 3415 3416 /* Fill in the special first entry in the procedure linkage table. */ 3417 if (htab->splt && htab->splt->size > 0) 3418 { 3419 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE); 3420 if (info->shared) 3421 { 3422 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0, 3423 htab->splt->contents ); 3424 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1, 3425 htab->splt->contents +4 ); 3426 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2, 3427 htab->splt->contents +8 ); 3428 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3, 3429 htab->splt->contents +12 ); 3430 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4, 3431 htab->splt->contents +16 ); 3432 } 3433 else 3434 { 3435 bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0, 3436 htab->splt->contents ); 3437 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1, 3438 htab->splt->contents +4 ); 3439 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2, 3440 htab->splt->contents +8 ); 3441 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3, 3442 htab->splt->contents +12 ); 3443 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4, 3444 htab->splt->contents +16 ); 3445 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5, 3446 htab->splt->contents +20 ); 3447 bfd_put_32 (output_bfd, 3448 htab->sgotplt->output_section->vma 3449 + htab->sgotplt->output_offset, 3450 htab->splt->contents + 24); 3451 } 3452 elf_section_data (htab->splt->output_section) 3453 ->this_hdr.sh_entsize = 4; 3454 } 3455 3456 } 3457 3458 if (htab->sgotplt) 3459 { 3460 /* Fill in the first three entries in the global offset table. */ 3461 if (htab->sgotplt->size > 0) 3462 { 3463 bfd_put_32 (output_bfd, 3464 (sdyn == NULL ? (bfd_vma) 0 3465 : sdyn->output_section->vma + sdyn->output_offset), 3466 htab->sgotplt->contents); 3467 /* One entry for shared object struct ptr. */ 3468 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4); 3469 /* One entry for _dl_runtime_resolve. */ 3470 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); 3471 } 3472 3473 elf_section_data (htab->sgotplt->output_section) 3474 ->this_hdr.sh_entsize = 4; 3475 } 3476 return TRUE; 3477} 3478 3479static bfd_boolean 3480elf_s390_grok_prstatus (abfd, note) 3481 bfd * abfd; 3482 Elf_Internal_Note * note; 3483{ 3484 int offset; 3485 unsigned int size; 3486 3487 switch (note->descsz) 3488 { 3489 default: 3490 return FALSE; 3491 3492 case 224: /* S/390 Linux. */ 3493 /* pr_cursig */ 3494 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); 3495 3496 /* pr_pid */ 3497 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); 3498 3499 /* pr_reg */ 3500 offset = 72; 3501 size = 144; 3502 break; 3503 } 3504 3505 /* Make a ".reg/999" section. */ 3506 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 3507 size, note->descpos + offset); 3508} 3509 3510/* Return address for Ith PLT stub in section PLT, for relocation REL 3511 or (bfd_vma) -1 if it should not be included. */ 3512 3513static bfd_vma 3514elf_s390_plt_sym_val (bfd_vma i, const asection *plt, 3515 const arelent *rel ATTRIBUTE_UNUSED) 3516{ 3517 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; 3518} 3519 3520 3521#define TARGET_BIG_SYM bfd_elf32_s390_vec 3522#define TARGET_BIG_NAME "elf32-s390" 3523#define ELF_ARCH bfd_arch_s390 3524#define ELF_MACHINE_CODE EM_S390 3525#define ELF_MACHINE_ALT1 EM_S390_OLD 3526#define ELF_MAXPAGESIZE 0x1000 3527 3528#define elf_backend_can_gc_sections 1 3529#define elf_backend_can_refcount 1 3530#define elf_backend_want_got_plt 1 3531#define elf_backend_plt_readonly 1 3532#define elf_backend_want_plt_sym 0 3533#define elf_backend_got_header_size 12 3534#define elf_backend_rela_normal 1 3535 3536#define elf_info_to_howto elf_s390_info_to_howto 3537 3538#define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name 3539#define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create 3540#define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup 3541#define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup 3542 3543#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol 3544#define elf_backend_check_relocs elf_s390_check_relocs 3545#define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol 3546#define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections 3547#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections 3548#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol 3549#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook 3550#define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook 3551#define elf_backend_reloc_type_class elf_s390_reloc_type_class 3552#define elf_backend_relocate_section elf_s390_relocate_section 3553#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections 3554#define elf_backend_init_index_section _bfd_elf_init_1_index_section 3555#define elf_backend_reloc_type_class elf_s390_reloc_type_class 3556#define elf_backend_grok_prstatus elf_s390_grok_prstatus 3557#define elf_backend_plt_sym_val elf_s390_plt_sym_val 3558 3559#define bfd_elf32_mkobject elf_s390_mkobject 3560#define elf_backend_object_p elf_s390_object_p 3561 3562#include "elf32-target.h" 3563