1/* IBM S/390-specific support for 32-bit ELF 2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006 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 "bfd.h" 24#include "sysdep.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} 336 337/* We need to use ELF32_R_TYPE so we have our own copy of this function, 338 and elf32-s390.c has its own copy. */ 339 340static void 341elf_s390_info_to_howto (abfd, cache_ptr, dst) 342 bfd *abfd ATTRIBUTE_UNUSED; 343 arelent *cache_ptr; 344 Elf_Internal_Rela *dst; 345{ 346 unsigned int r_type = ELF32_R_TYPE(dst->r_info); 347 switch (r_type) 348 { 349 case R_390_GNU_VTINHERIT: 350 cache_ptr->howto = &elf32_s390_vtinherit_howto; 351 break; 352 353 case R_390_GNU_VTENTRY: 354 cache_ptr->howto = &elf32_s390_vtentry_howto; 355 break; 356 357 default: 358 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0])) 359 { 360 (*_bfd_error_handler) (_("%B: invalid relocation type %d"), 361 abfd, (int) r_type); 362 r_type = R_390_NONE; 363 } 364 cache_ptr->howto = &elf_howto_table[r_type]; 365 } 366} 367 368/* A relocation function which doesn't do anything. */ 369static bfd_reloc_status_type 370s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section, 371 output_bfd, error_message) 372 bfd *abfd ATTRIBUTE_UNUSED; 373 arelent *reloc_entry; 374 asymbol *symbol ATTRIBUTE_UNUSED; 375 PTR data ATTRIBUTE_UNUSED; 376 asection *input_section; 377 bfd *output_bfd; 378 char **error_message ATTRIBUTE_UNUSED; 379{ 380 if (output_bfd) 381 reloc_entry->address += input_section->output_offset; 382 return bfd_reloc_ok; 383} 384 385/* Handle the large displacement relocs. */ 386static bfd_reloc_status_type 387s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section, 388 output_bfd, error_message) 389 bfd *abfd ATTRIBUTE_UNUSED; 390 arelent *reloc_entry; 391 asymbol *symbol; 392 PTR data ATTRIBUTE_UNUSED; 393 asection *input_section; 394 bfd *output_bfd; 395 char **error_message ATTRIBUTE_UNUSED; 396{ 397 reloc_howto_type *howto = reloc_entry->howto; 398 bfd_vma relocation; 399 bfd_vma insn; 400 401 if (output_bfd != (bfd *) NULL 402 && (symbol->flags & BSF_SECTION_SYM) == 0 403 && (! howto->partial_inplace 404 || reloc_entry->addend == 0)) 405 { 406 reloc_entry->address += input_section->output_offset; 407 return bfd_reloc_ok; 408 } 409 410 if (output_bfd != NULL) 411 return bfd_reloc_continue; 412 413 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 414 return bfd_reloc_outofrange; 415 416 relocation = (symbol->value 417 + symbol->section->output_section->vma 418 + symbol->section->output_offset); 419 relocation += reloc_entry->addend; 420 if (howto->pc_relative) 421 { 422 relocation -= (input_section->output_section->vma 423 + input_section->output_offset); 424 relocation -= reloc_entry->address; 425 } 426 427 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); 428 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; 429 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); 430 431 if ((bfd_signed_vma) relocation < - 0x80000 432 || (bfd_signed_vma) relocation > 0x7ffff) 433 return bfd_reloc_overflow; 434 else 435 return bfd_reloc_ok; 436} 437 438static bfd_boolean 439elf_s390_is_local_label_name (abfd, name) 440 bfd *abfd; 441 const char *name; 442{ 443 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) 444 return TRUE; 445 446 return _bfd_elf_is_local_label_name (abfd, name); 447} 448 449/* Functions for the 390 ELF linker. */ 450 451/* The name of the dynamic interpreter. This is put in the .interp 452 section. */ 453 454#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 455 456/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 457 copying dynamic variables from a shared lib into an app's dynbss 458 section, and instead use a dynamic relocation to point into the 459 shared lib. */ 460#define ELIMINATE_COPY_RELOCS 1 461 462/* The size in bytes of the first entry in the procedure linkage table. */ 463#define PLT_FIRST_ENTRY_SIZE 32 464/* The size in bytes of an entry in the procedure linkage table. */ 465#define PLT_ENTRY_SIZE 32 466 467#define GOT_ENTRY_SIZE 4 468 469/* The first three entries in a procedure linkage table are reserved, 470 and the initial contents are unimportant (we zero them out). 471 Subsequent entries look like this. See the SVR4 ABI 386 472 supplement to see how this works. */ 473 474/* For the s390, simple addr offset can only be 0 - 4096. 475 To use the full 2 GB address space, several instructions 476 are needed to load an address in a register and execute 477 a branch( or just saving the address) 478 479 Furthermore, only r 0 and 1 are free to use!!! */ 480 481/* The first 3 words in the GOT are then reserved. 482 Word 0 is the address of the dynamic table. 483 Word 1 is a pointer to a structure describing the object 484 Word 2 is used to point to the loader entry address. 485 486 The code for position independent PLT entries looks like this: 487 488 r12 holds addr of the current GOT at entry to the PLT 489 490 The GOT holds the address in the PLT to be executed. 491 The loader then gets: 492 24(15) = Pointer to the structure describing the object. 493 28(15) = Offset in symbol table 494 495 The loader must then find the module where the function is 496 and insert the address in the GOT. 497 498 Note: 390 can only address +- 64 K relative. 499 We check if offset > 65536, then make a relative branch -64xxx 500 back to a previous defined branch 501 502PLT1: BASR 1,0 # 2 bytes 503 L 1,22(1) # 4 bytes Load offset in GOT in r 1 504 L 1,(1,12) # 4 bytes Load address from GOT in r1 505 BCR 15,1 # 2 bytes Jump to address 506RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 507 L 1,14(1) # 4 bytes Load offset in symol table in r1 508 BRC 15,-x # 4 bytes Jump to start of PLT 509 .word 0 # 2 bytes filler 510 .long ? # 4 bytes offset in GOT 511 .long ? # 4 bytes offset into symbol table 512 513 This was the general case. There are two additional, optimizes PLT 514 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768. 515 First the one for GOT offsets < 4096: 516 517PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1 518 BCR 15,1 # 2 bytes Jump to address 519 .word 0,0,0 # 6 bytes filler 520RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 521 L 1,14(1) # 4 bytes Load offset in symbol table in r1 522 BRC 15,-x # 4 bytes Jump to start of PLT 523 .word 0,0,0 # 6 bytes filler 524 .long ? # 4 bytes offset into symbol table 525 526 Second the one for GOT offsets < 32768: 527 528PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1 529 L 1,(1,12) # 4 bytes Load address from GOT to r1 530 BCR 15,1 # 2 bytes Jump to address 531 .word 0 # 2 bytes filler 532RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 533 L 1,14(1) # 4 bytes Load offset in symbol table in r1 534 BRC 15,-x # 4 bytes Jump to start of PLT 535 .word 0,0,0 # 6 bytes filler 536 .long ? # 4 bytes offset into symbol table 537 538Total = 32 bytes per PLT entry 539 540 The code for static build PLT entries looks like this: 541 542PLT1: BASR 1,0 # 2 bytes 543 L 1,22(1) # 4 bytes Load address of GOT entry 544 L 1,0(0,1) # 4 bytes Load address from GOT in r1 545 BCR 15,1 # 2 bytes Jump to address 546RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 547 L 1,14(1) # 4 bytes Load offset in symbol table in r1 548 BRC 15,-x # 4 bytes Jump to start of PLT 549 .word 0 # 2 bytes filler 550 .long ? # 4 bytes address of GOT entry 551 .long ? # 4 bytes offset into symbol table */ 552 553#define PLT_PIC_ENTRY_WORD0 0x0d105810 554#define PLT_PIC_ENTRY_WORD1 0x10165811 555#define PLT_PIC_ENTRY_WORD2 0xc00007f1 556#define PLT_PIC_ENTRY_WORD3 0x0d105810 557#define PLT_PIC_ENTRY_WORD4 0x100ea7f4 558 559#define PLT_PIC12_ENTRY_WORD0 0x5810c000 560#define PLT_PIC12_ENTRY_WORD1 0x07f10000 561#define PLT_PIC12_ENTRY_WORD2 0x00000000 562#define PLT_PIC12_ENTRY_WORD3 0x0d105810 563#define PLT_PIC12_ENTRY_WORD4 0x100ea7f4 564 565#define PLT_PIC16_ENTRY_WORD0 0xa7180000 566#define PLT_PIC16_ENTRY_WORD1 0x5811c000 567#define PLT_PIC16_ENTRY_WORD2 0x07f10000 568#define PLT_PIC16_ENTRY_WORD3 0x0d105810 569#define PLT_PIC16_ENTRY_WORD4 0x100ea7f4 570 571#define PLT_ENTRY_WORD0 0x0d105810 572#define PLT_ENTRY_WORD1 0x10165810 573#define PLT_ENTRY_WORD2 0x100007f1 574#define PLT_ENTRY_WORD3 0x0d105810 575#define PLT_ENTRY_WORD4 0x100ea7f4 576 577/* The first PLT entry pushes the offset into the symbol table 578 from R1 onto the stack at 8(15) and the loader object info 579 at 12(15), loads the loader address in R1 and jumps to it. */ 580 581/* The first entry in the PLT for PIC code: 582 583PLT0: 584 ST 1,28(15) # R1 has offset into symbol table 585 L 1,4(12) # Get loader ino(object struct address) 586 ST 1,24(15) # Store address 587 L 1,8(12) # Entry address of loader in R1 588 BR 1 # Jump to loader 589 590 The first entry in the PLT for static code: 591 592PLT0: 593 ST 1,28(15) # R1 has offset into symbol table 594 BASR 1,0 595 L 1,18(0,1) # Get address of GOT 596 MVC 24(4,15),4(1) # Move loader ino to stack 597 L 1,8(1) # Get address of loader 598 BR 1 # Jump to loader 599 .word 0 # filler 600 .long got # address of GOT */ 601 602#define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c 603#define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004 604#define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018 605#define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008 606#define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000 607 608#define PLT_FIRST_ENTRY_WORD0 0x5010f01c 609#define PLT_FIRST_ENTRY_WORD1 0x0d105810 610#define PLT_FIRST_ENTRY_WORD2 0x1012D203 611#define PLT_FIRST_ENTRY_WORD3 0xf0181004 612#define PLT_FIRST_ENTRY_WORD4 0x58101008 613#define PLT_FIRST_ENTRY_WORD5 0x07f10000 614 615/* The s390 linker needs to keep track of the number of relocs that it 616 decides to copy as dynamic relocs in check_relocs for each symbol. 617 This is so that it can later discard them if they are found to be 618 unnecessary. We store the information in a field extending the 619 regular ELF linker hash table. */ 620 621struct elf_s390_dyn_relocs 622{ 623 struct elf_s390_dyn_relocs *next; 624 625 /* The input section of the reloc. */ 626 asection *sec; 627 628 /* Total number of relocs copied for the input section. */ 629 bfd_size_type count; 630 631 /* Number of pc-relative relocs copied for the input section. */ 632 bfd_size_type pc_count; 633}; 634 635/* s390 ELF linker hash entry. */ 636 637struct elf_s390_link_hash_entry 638{ 639 struct elf_link_hash_entry elf; 640 641 /* Track dynamic relocs copied for this symbol. */ 642 struct elf_s390_dyn_relocs *dyn_relocs; 643 644 /* Number of GOTPLT references for a function. */ 645 bfd_signed_vma gotplt_refcount; 646 647#define GOT_UNKNOWN 0 648#define GOT_NORMAL 1 649#define GOT_TLS_GD 2 650#define GOT_TLS_IE 3 651#define GOT_TLS_IE_NLT 4 652 unsigned char tls_type; 653}; 654 655#define elf_s390_hash_entry(ent) \ 656 ((struct elf_s390_link_hash_entry *)(ent)) 657 658struct elf_s390_obj_tdata 659{ 660 struct elf_obj_tdata root; 661 662 /* tls_type for each local got entry. */ 663 char *local_got_tls_type; 664}; 665 666#define elf_s390_tdata(abfd) \ 667 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) 668 669#define elf_s390_local_got_tls_type(abfd) \ 670 (elf_s390_tdata (abfd)->local_got_tls_type) 671 672static bfd_boolean 673elf_s390_mkobject (bfd *abfd) 674{ 675 if (abfd->tdata.any == NULL) 676 { 677 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); 678 abfd->tdata.any = bfd_zalloc (abfd, amt); 679 if (abfd->tdata.any == NULL) 680 return FALSE; 681 } 682 return bfd_elf_mkobject (abfd); 683} 684 685static bfd_boolean 686elf_s390_object_p (abfd) 687 bfd *abfd; 688{ 689 /* Set the right machine number for an s390 elf32 file. */ 690 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31); 691} 692 693/* s390 ELF linker hash table. */ 694 695struct elf_s390_link_hash_table 696{ 697 struct elf_link_hash_table elf; 698 699 /* Short-cuts to get to dynamic linker sections. */ 700 asection *sgot; 701 asection *sgotplt; 702 asection *srelgot; 703 asection *splt; 704 asection *srelplt; 705 asection *sdynbss; 706 asection *srelbss; 707 708 union { 709 bfd_signed_vma refcount; 710 bfd_vma offset; 711 } tls_ldm_got; 712 713 /* Small local sym to section mapping cache. */ 714 struct sym_sec_cache sym_sec; 715}; 716 717/* Get the s390 ELF linker hash table from a link_info structure. */ 718 719#define elf_s390_hash_table(p) \ 720 ((struct elf_s390_link_hash_table *) ((p)->hash)) 721 722/* Create an entry in an s390 ELF linker hash table. */ 723 724static struct bfd_hash_entry * 725link_hash_newfunc (entry, table, string) 726 struct bfd_hash_entry *entry; 727 struct bfd_hash_table *table; 728 const char *string; 729{ 730 /* Allocate the structure if it has not already been allocated by a 731 subclass. */ 732 if (entry == NULL) 733 { 734 entry = bfd_hash_allocate (table, 735 sizeof (struct elf_s390_link_hash_entry)); 736 if (entry == NULL) 737 return entry; 738 } 739 740 /* Call the allocation method of the superclass. */ 741 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 742 if (entry != NULL) 743 { 744 struct elf_s390_link_hash_entry *eh; 745 746 eh = (struct elf_s390_link_hash_entry *) entry; 747 eh->dyn_relocs = NULL; 748 eh->gotplt_refcount = 0; 749 eh->tls_type = GOT_UNKNOWN; 750 } 751 752 return entry; 753} 754 755/* Create an s390 ELF linker hash table. */ 756 757static struct bfd_link_hash_table * 758elf_s390_link_hash_table_create (abfd) 759 bfd *abfd; 760{ 761 struct elf_s390_link_hash_table *ret; 762 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); 763 764 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt); 765 if (ret == NULL) 766 return NULL; 767 768 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, 769 sizeof (struct elf_s390_link_hash_entry))) 770 { 771 free (ret); 772 return NULL; 773 } 774 775 ret->sgot = NULL; 776 ret->sgotplt = NULL; 777 ret->srelgot = NULL; 778 ret->splt = NULL; 779 ret->srelplt = NULL; 780 ret->sdynbss = NULL; 781 ret->srelbss = NULL; 782 ret->tls_ldm_got.refcount = 0; 783 ret->sym_sec.abfd = NULL; 784 785 return &ret->elf.root; 786} 787 788/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up 789 shortcuts to them in our hash table. */ 790 791static bfd_boolean 792create_got_section (dynobj, info) 793 bfd *dynobj; 794 struct bfd_link_info *info; 795{ 796 struct elf_s390_link_hash_table *htab; 797 798 if (! _bfd_elf_create_got_section (dynobj, info)) 799 return FALSE; 800 801 htab = elf_s390_hash_table (info); 802 htab->sgot = bfd_get_section_by_name (dynobj, ".got"); 803 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); 804 if (!htab->sgot || !htab->sgotplt) 805 abort (); 806 807 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got", 808 (SEC_ALLOC | SEC_LOAD 809 | SEC_HAS_CONTENTS 810 | SEC_IN_MEMORY 811 | SEC_LINKER_CREATED 812 | SEC_READONLY)); 813 if (htab->srelgot == NULL 814 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) 815 return FALSE; 816 return TRUE; 817} 818 819/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and 820 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our 821 hash table. */ 822 823static bfd_boolean 824elf_s390_create_dynamic_sections (dynobj, info) 825 bfd *dynobj; 826 struct bfd_link_info *info; 827{ 828 struct elf_s390_link_hash_table *htab; 829 830 htab = elf_s390_hash_table (info); 831 if (!htab->sgot && !create_got_section (dynobj, info)) 832 return FALSE; 833 834 if (!_bfd_elf_create_dynamic_sections (dynobj, info)) 835 return FALSE; 836 837 htab->splt = bfd_get_section_by_name (dynobj, ".plt"); 838 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); 839 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); 840 if (!info->shared) 841 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); 842 843 if (!htab->splt || !htab->srelplt || !htab->sdynbss 844 || (!info->shared && !htab->srelbss)) 845 abort (); 846 847 return TRUE; 848} 849 850/* Copy the extra info we tack onto an elf_link_hash_entry. */ 851 852static void 853elf_s390_copy_indirect_symbol (info, dir, ind) 854 struct bfd_link_info *info; 855 struct elf_link_hash_entry *dir, *ind; 856{ 857 struct elf_s390_link_hash_entry *edir, *eind; 858 859 edir = (struct elf_s390_link_hash_entry *) dir; 860 eind = (struct elf_s390_link_hash_entry *) ind; 861 862 if (eind->dyn_relocs != NULL) 863 { 864 if (edir->dyn_relocs != NULL) 865 { 866 struct elf_s390_dyn_relocs **pp; 867 struct elf_s390_dyn_relocs *p; 868 869 /* Add reloc counts against the indirect sym to the direct sym 870 list. Merge any entries against the same section. */ 871 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 872 { 873 struct elf_s390_dyn_relocs *q; 874 875 for (q = edir->dyn_relocs; q != NULL; q = q->next) 876 if (q->sec == p->sec) 877 { 878 q->pc_count += p->pc_count; 879 q->count += p->count; 880 *pp = p->next; 881 break; 882 } 883 if (q == NULL) 884 pp = &p->next; 885 } 886 *pp = edir->dyn_relocs; 887 } 888 889 edir->dyn_relocs = eind->dyn_relocs; 890 eind->dyn_relocs = NULL; 891 } 892 893 if (ind->root.type == bfd_link_hash_indirect 894 && dir->got.refcount <= 0) 895 { 896 edir->tls_type = eind->tls_type; 897 eind->tls_type = GOT_UNKNOWN; 898 } 899 900 if (ELIMINATE_COPY_RELOCS 901 && ind->root.type != bfd_link_hash_indirect 902 && dir->dynamic_adjusted) 903 { 904 /* If called to transfer flags for a weakdef during processing 905 of elf_adjust_dynamic_symbol, don't copy non_got_ref. 906 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 907 dir->ref_dynamic |= ind->ref_dynamic; 908 dir->ref_regular |= ind->ref_regular; 909 dir->ref_regular_nonweak |= ind->ref_regular_nonweak; 910 dir->needs_plt |= ind->needs_plt; 911 } 912 else 913 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 914} 915 916static int 917elf_s390_tls_transition (info, r_type, is_local) 918 struct bfd_link_info *info; 919 int r_type; 920 int is_local; 921{ 922 if (info->shared) 923 return r_type; 924 925 switch (r_type) 926 { 927 case R_390_TLS_GD32: 928 case R_390_TLS_IE32: 929 if (is_local) 930 return R_390_TLS_LE32; 931 return R_390_TLS_IE32; 932 case R_390_TLS_GOTIE32: 933 if (is_local) 934 return R_390_TLS_LE32; 935 return R_390_TLS_GOTIE32; 936 case R_390_TLS_LDM32: 937 return R_390_TLS_LE32; 938 } 939 940 return r_type; 941} 942 943/* Look through the relocs for a section during the first phase, and 944 allocate space in the global offset table or procedure linkage 945 table. */ 946 947static bfd_boolean 948elf_s390_check_relocs (abfd, info, sec, relocs) 949 bfd *abfd; 950 struct bfd_link_info *info; 951 asection *sec; 952 const Elf_Internal_Rela *relocs; 953{ 954 struct elf_s390_link_hash_table *htab; 955 Elf_Internal_Shdr *symtab_hdr; 956 struct elf_link_hash_entry **sym_hashes; 957 const Elf_Internal_Rela *rel; 958 const Elf_Internal_Rela *rel_end; 959 asection *sreloc; 960 bfd_signed_vma *local_got_refcounts; 961 int tls_type, old_tls_type; 962 963 if (info->relocatable) 964 return TRUE; 965 966 htab = elf_s390_hash_table (info); 967 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 968 sym_hashes = elf_sym_hashes (abfd); 969 local_got_refcounts = elf_local_got_refcounts (abfd); 970 971 sreloc = NULL; 972 973 rel_end = relocs + sec->reloc_count; 974 for (rel = relocs; rel < rel_end; rel++) 975 { 976 unsigned int r_type; 977 unsigned long r_symndx; 978 struct elf_link_hash_entry *h; 979 980 r_symndx = ELF32_R_SYM (rel->r_info); 981 982 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) 983 { 984 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), 985 abfd, r_symndx); 986 return FALSE; 987 } 988 989 if (r_symndx < symtab_hdr->sh_info) 990 h = NULL; 991 else 992 { 993 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 994 while (h->root.type == bfd_link_hash_indirect 995 || h->root.type == bfd_link_hash_warning) 996 h = (struct elf_link_hash_entry *) h->root.u.i.link; 997 } 998 999 /* Create got section and local_got_refcounts array if they 1000 are needed. */ 1001 r_type = elf_s390_tls_transition (info, 1002 ELF32_R_TYPE (rel->r_info), 1003 h == NULL); 1004 switch (r_type) 1005 { 1006 case R_390_GOT12: 1007 case R_390_GOT16: 1008 case R_390_GOT20: 1009 case R_390_GOT32: 1010 case R_390_GOTENT: 1011 case R_390_GOTPLT12: 1012 case R_390_GOTPLT16: 1013 case R_390_GOTPLT20: 1014 case R_390_GOTPLT32: 1015 case R_390_GOTPLTENT: 1016 case R_390_TLS_GD32: 1017 case R_390_TLS_GOTIE12: 1018 case R_390_TLS_GOTIE20: 1019 case R_390_TLS_GOTIE32: 1020 case R_390_TLS_IEENT: 1021 case R_390_TLS_IE32: 1022 case R_390_TLS_LDM32: 1023 if (h == NULL 1024 && local_got_refcounts == NULL) 1025 { 1026 bfd_size_type size; 1027 1028 size = symtab_hdr->sh_info; 1029 size *= (sizeof (bfd_signed_vma) + sizeof(char)); 1030 local_got_refcounts = ((bfd_signed_vma *) 1031 bfd_zalloc (abfd, size)); 1032 if (local_got_refcounts == NULL) 1033 return FALSE; 1034 elf_local_got_refcounts (abfd) = local_got_refcounts; 1035 elf_s390_local_got_tls_type (abfd) 1036 = (char *) (local_got_refcounts + symtab_hdr->sh_info); 1037 } 1038 /* Fall through. */ 1039 case R_390_GOTOFF16: 1040 case R_390_GOTOFF32: 1041 case R_390_GOTPC: 1042 case R_390_GOTPCDBL: 1043 if (htab->sgot == NULL) 1044 { 1045 if (htab->elf.dynobj == NULL) 1046 htab->elf.dynobj = abfd; 1047 if (!create_got_section (htab->elf.dynobj, info)) 1048 return FALSE; 1049 } 1050 } 1051 1052 switch (r_type) 1053 { 1054 case R_390_GOTOFF16: 1055 case R_390_GOTOFF32: 1056 case R_390_GOTPC: 1057 case R_390_GOTPCDBL: 1058 /* Got is created, nothing to be done. */ 1059 break; 1060 1061 case R_390_PLT16DBL: 1062 case R_390_PLT32DBL: 1063 case R_390_PLT32: 1064 case R_390_PLTOFF16: 1065 case R_390_PLTOFF32: 1066 /* This symbol requires a procedure linkage table entry. We 1067 actually build the entry in adjust_dynamic_symbol, 1068 because this might be a case of linking PIC code which is 1069 never referenced by a dynamic object, in which case we 1070 don't need to generate a procedure linkage table entry 1071 after all. */ 1072 1073 /* If this is a local symbol, we resolve it directly without 1074 creating a procedure linkage table entry. */ 1075 if (h != NULL) 1076 { 1077 h->needs_plt = 1; 1078 h->plt.refcount += 1; 1079 } 1080 break; 1081 1082 case R_390_GOTPLT12: 1083 case R_390_GOTPLT16: 1084 case R_390_GOTPLT20: 1085 case R_390_GOTPLT32: 1086 case R_390_GOTPLTENT: 1087 /* This symbol requires either a procedure linkage table entry 1088 or an entry in the local got. We actually build the entry 1089 in adjust_dynamic_symbol because whether this is really a 1090 global reference can change and with it the fact if we have 1091 to create a plt entry or a local got entry. To be able to 1092 make a once global symbol a local one we have to keep track 1093 of the number of gotplt references that exist for this 1094 symbol. */ 1095 if (h != NULL) 1096 { 1097 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; 1098 h->needs_plt = 1; 1099 h->plt.refcount += 1; 1100 } 1101 else 1102 local_got_refcounts[r_symndx] += 1; 1103 break; 1104 1105 case R_390_TLS_LDM32: 1106 htab->tls_ldm_got.refcount += 1; 1107 break; 1108 1109 case R_390_TLS_IE32: 1110 case R_390_TLS_GOTIE12: 1111 case R_390_TLS_GOTIE20: 1112 case R_390_TLS_GOTIE32: 1113 case R_390_TLS_IEENT: 1114 if (info->shared) 1115 info->flags |= DF_STATIC_TLS; 1116 /* Fall through. */ 1117 1118 case R_390_GOT12: 1119 case R_390_GOT16: 1120 case R_390_GOT20: 1121 case R_390_GOT32: 1122 case R_390_GOTENT: 1123 case R_390_TLS_GD32: 1124 /* This symbol requires a global offset table entry. */ 1125 switch (r_type) 1126 { 1127 default: 1128 case R_390_GOT12: 1129 case R_390_GOT16: 1130 case R_390_GOT20: 1131 case R_390_GOT32: 1132 case R_390_GOTENT: 1133 tls_type = GOT_NORMAL; 1134 break; 1135 case R_390_TLS_GD32: 1136 tls_type = GOT_TLS_GD; 1137 break; 1138 case R_390_TLS_IE32: 1139 case R_390_TLS_GOTIE32: 1140 tls_type = GOT_TLS_IE; 1141 break; 1142 case R_390_TLS_GOTIE12: 1143 case R_390_TLS_GOTIE20: 1144 case R_390_TLS_IEENT: 1145 tls_type = GOT_TLS_IE_NLT; 1146 break; 1147 } 1148 1149 if (h != NULL) 1150 { 1151 h->got.refcount += 1; 1152 old_tls_type = elf_s390_hash_entry(h)->tls_type; 1153 } 1154 else 1155 { 1156 local_got_refcounts[r_symndx] += 1; 1157 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; 1158 } 1159 /* If a TLS symbol is accessed using IE at least once, 1160 there is no point to use dynamic model for it. */ 1161 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) 1162 { 1163 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) 1164 { 1165 (*_bfd_error_handler) 1166 (_("%B: `%s' accessed both as normal and thread local symbol"), 1167 abfd, h->root.root.string); 1168 return FALSE; 1169 } 1170 if (old_tls_type > tls_type) 1171 tls_type = old_tls_type; 1172 } 1173 1174 if (old_tls_type != tls_type) 1175 { 1176 if (h != NULL) 1177 elf_s390_hash_entry (h)->tls_type = tls_type; 1178 else 1179 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; 1180 } 1181 1182 if (r_type != R_390_TLS_IE32) 1183 break; 1184 /* Fall through. */ 1185 1186 case R_390_TLS_LE32: 1187 if (!info->shared) 1188 break; 1189 info->flags |= DF_STATIC_TLS; 1190 /* Fall through. */ 1191 1192 case R_390_8: 1193 case R_390_16: 1194 case R_390_32: 1195 case R_390_PC16: 1196 case R_390_PC16DBL: 1197 case R_390_PC32DBL: 1198 case R_390_PC32: 1199 if (h != NULL && !info->shared) 1200 { 1201 /* If this reloc is in a read-only section, we might 1202 need a copy reloc. We can't check reliably at this 1203 stage whether the section is read-only, as input 1204 sections have not yet been mapped to output sections. 1205 Tentatively set the flag for now, and correct in 1206 adjust_dynamic_symbol. */ 1207 h->non_got_ref = 1; 1208 1209 /* We may need a .plt entry if the function this reloc 1210 refers to is in a shared lib. */ 1211 h->plt.refcount += 1; 1212 } 1213 1214 /* If we are creating a shared library, and this is a reloc 1215 against a global symbol, or a non PC relative reloc 1216 against a local symbol, then we need to copy the reloc 1217 into the shared library. However, if we are linking with 1218 -Bsymbolic, we do not need to copy a reloc against a 1219 global symbol which is defined in an object we are 1220 including in the link (i.e., DEF_REGULAR is set). At 1221 this point we have not seen all the input files, so it is 1222 possible that DEF_REGULAR is not set now but will be set 1223 later (it is never cleared). In case of a weak definition, 1224 DEF_REGULAR may be cleared later by a strong definition in 1225 a shared library. We account for that possibility below by 1226 storing information in the relocs_copied field of the hash 1227 table entry. A similar situation occurs when creating 1228 shared libraries and symbol visibility changes render the 1229 symbol local. 1230 1231 If on the other hand, we are creating an executable, we 1232 may need to keep relocations for symbols satisfied by a 1233 dynamic library if we manage to avoid copy relocs for the 1234 symbol. */ 1235 if ((info->shared 1236 && (sec->flags & SEC_ALLOC) != 0 1237 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16 1238 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL 1239 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL 1240 && ELF32_R_TYPE (rel->r_info) != R_390_PC32) 1241 || (h != NULL 1242 && (! info->symbolic 1243 || h->root.type == bfd_link_hash_defweak 1244 || !h->def_regular)))) 1245 || (ELIMINATE_COPY_RELOCS 1246 && !info->shared 1247 && (sec->flags & SEC_ALLOC) != 0 1248 && h != NULL 1249 && (h->root.type == bfd_link_hash_defweak 1250 || !h->def_regular))) 1251 { 1252 struct elf_s390_dyn_relocs *p; 1253 struct elf_s390_dyn_relocs **head; 1254 1255 /* We must copy these reloc types into the output file. 1256 Create a reloc section in dynobj and make room for 1257 this reloc. */ 1258 if (sreloc == NULL) 1259 { 1260 const char *name; 1261 bfd *dynobj; 1262 1263 name = (bfd_elf_string_from_elf_section 1264 (abfd, 1265 elf_elfheader (abfd)->e_shstrndx, 1266 elf_section_data (sec)->rel_hdr.sh_name)); 1267 if (name == NULL) 1268 return FALSE; 1269 1270 if (! CONST_STRNEQ (name, ".rela") 1271 || strcmp (bfd_get_section_name (abfd, sec), 1272 name + 5) != 0) 1273 { 1274 (*_bfd_error_handler) 1275 (_("%B: bad relocation section name `%s\'"), 1276 abfd, name); 1277 } 1278 1279 if (htab->elf.dynobj == NULL) 1280 htab->elf.dynobj = abfd; 1281 1282 dynobj = htab->elf.dynobj; 1283 sreloc = bfd_get_section_by_name (dynobj, name); 1284 if (sreloc == NULL) 1285 { 1286 flagword flags; 1287 1288 flags = (SEC_HAS_CONTENTS | SEC_READONLY 1289 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 1290 if ((sec->flags & SEC_ALLOC) != 0) 1291 flags |= SEC_ALLOC | SEC_LOAD; 1292 sreloc = bfd_make_section_with_flags (dynobj, 1293 name, 1294 flags); 1295 if (sreloc == NULL 1296 || ! bfd_set_section_alignment (dynobj, sreloc, 2)) 1297 return FALSE; 1298 } 1299 elf_section_data (sec)->sreloc = sreloc; 1300 } 1301 1302 /* If this is a global symbol, we count the number of 1303 relocations we need for this symbol. */ 1304 if (h != NULL) 1305 { 1306 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; 1307 } 1308 else 1309 { 1310 /* Track dynamic relocs needed for local syms too. 1311 We really need local syms available to do this 1312 easily. Oh well. */ 1313 asection *s; 1314 void *vpp; 1315 1316 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, 1317 sec, r_symndx); 1318 if (s == NULL) 1319 return FALSE; 1320 1321 vpp = &elf_section_data (s)->local_dynrel; 1322 head = (struct elf_s390_dyn_relocs **) vpp; 1323 } 1324 1325 p = *head; 1326 if (p == NULL || p->sec != sec) 1327 { 1328 bfd_size_type amt = sizeof *p; 1329 1330 p = ((struct elf_s390_dyn_relocs *) 1331 bfd_alloc (htab->elf.dynobj, amt)); 1332 if (p == NULL) 1333 return FALSE; 1334 p->next = *head; 1335 *head = p; 1336 p->sec = sec; 1337 p->count = 0; 1338 p->pc_count = 0; 1339 } 1340 1341 p->count += 1; 1342 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16 1343 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL 1344 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL 1345 || ELF32_R_TYPE (rel->r_info) == R_390_PC32) 1346 p->pc_count += 1; 1347 } 1348 break; 1349 1350 /* This relocation describes the C++ object vtable hierarchy. 1351 Reconstruct it for later use during GC. */ 1352 case R_390_GNU_VTINHERIT: 1353 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1354 return FALSE; 1355 break; 1356 1357 /* This relocation describes which C++ vtable entries are actually 1358 used. Record for later use during GC. */ 1359 case R_390_GNU_VTENTRY: 1360 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1361 return FALSE; 1362 break; 1363 1364 default: 1365 break; 1366 } 1367 } 1368 1369 return TRUE; 1370} 1371 1372/* Return the section that should be marked against GC for a given 1373 relocation. */ 1374 1375static asection * 1376elf_s390_gc_mark_hook (asection *sec, 1377 struct bfd_link_info *info, 1378 Elf_Internal_Rela *rel, 1379 struct elf_link_hash_entry *h, 1380 Elf_Internal_Sym *sym) 1381{ 1382 if (h != NULL) 1383 switch (ELF32_R_TYPE (rel->r_info)) 1384 { 1385 case R_390_GNU_VTINHERIT: 1386 case R_390_GNU_VTENTRY: 1387 return NULL; 1388 } 1389 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1390 1391} 1392 1393/* Update the got entry reference counts for the section being removed. */ 1394 1395static bfd_boolean 1396elf_s390_gc_sweep_hook (bfd *abfd, 1397 struct bfd_link_info *info, 1398 asection *sec, 1399 const Elf_Internal_Rela *relocs) 1400{ 1401 Elf_Internal_Shdr *symtab_hdr; 1402 struct elf_link_hash_entry **sym_hashes; 1403 bfd_signed_vma *local_got_refcounts; 1404 const Elf_Internal_Rela *rel, *relend; 1405 1406 elf_section_data (sec)->local_dynrel = NULL; 1407 1408 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1409 sym_hashes = elf_sym_hashes (abfd); 1410 local_got_refcounts = elf_local_got_refcounts (abfd); 1411 1412 relend = relocs + sec->reloc_count; 1413 for (rel = relocs; rel < relend; rel++) 1414 { 1415 unsigned long r_symndx; 1416 unsigned int r_type; 1417 struct elf_link_hash_entry *h = NULL; 1418 1419 r_symndx = ELF32_R_SYM (rel->r_info); 1420 if (r_symndx >= symtab_hdr->sh_info) 1421 { 1422 struct elf_s390_link_hash_entry *eh; 1423 struct elf_s390_dyn_relocs **pp; 1424 struct elf_s390_dyn_relocs *p; 1425 1426 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1427 while (h->root.type == bfd_link_hash_indirect 1428 || h->root.type == bfd_link_hash_warning) 1429 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1430 eh = (struct elf_s390_link_hash_entry *) h; 1431 1432 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 1433 if (p->sec == sec) 1434 { 1435 /* Everything must go for SEC. */ 1436 *pp = p->next; 1437 break; 1438 } 1439 } 1440 1441 r_type = ELF32_R_TYPE (rel->r_info); 1442 r_type = elf_s390_tls_transition (info, r_type, h != NULL); 1443 switch (r_type) 1444 { 1445 case R_390_TLS_LDM32: 1446 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) 1447 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; 1448 break; 1449 1450 case R_390_TLS_GD32: 1451 case R_390_TLS_IE32: 1452 case R_390_TLS_GOTIE12: 1453 case R_390_TLS_GOTIE20: 1454 case R_390_TLS_GOTIE32: 1455 case R_390_TLS_IEENT: 1456 case R_390_GOT12: 1457 case R_390_GOT16: 1458 case R_390_GOT20: 1459 case R_390_GOT32: 1460 case R_390_GOTOFF16: 1461 case R_390_GOTOFF32: 1462 case R_390_GOTPC: 1463 case R_390_GOTPCDBL: 1464 case R_390_GOTENT: 1465 if (h != NULL) 1466 { 1467 if (h->got.refcount > 0) 1468 h->got.refcount -= 1; 1469 } 1470 else if (local_got_refcounts != NULL) 1471 { 1472 if (local_got_refcounts[r_symndx] > 0) 1473 local_got_refcounts[r_symndx] -= 1; 1474 } 1475 break; 1476 1477 case R_390_8: 1478 case R_390_12: 1479 case R_390_16: 1480 case R_390_20: 1481 case R_390_32: 1482 case R_390_PC16: 1483 case R_390_PC16DBL: 1484 case R_390_PC32DBL: 1485 case R_390_PC32: 1486 if (info->shared) 1487 break; 1488 /* Fall through. */ 1489 1490 case R_390_PLT16DBL: 1491 case R_390_PLT32DBL: 1492 case R_390_PLT32: 1493 case R_390_PLTOFF16: 1494 case R_390_PLTOFF32: 1495 if (h != NULL) 1496 { 1497 if (h->plt.refcount > 0) 1498 h->plt.refcount -= 1; 1499 } 1500 break; 1501 1502 case R_390_GOTPLT12: 1503 case R_390_GOTPLT16: 1504 case R_390_GOTPLT20: 1505 case R_390_GOTPLT32: 1506 case R_390_GOTPLTENT: 1507 if (h != NULL) 1508 { 1509 if (h->plt.refcount > 0) 1510 { 1511 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; 1512 h->plt.refcount -= 1; 1513 } 1514 } 1515 else if (local_got_refcounts != NULL) 1516 { 1517 if (local_got_refcounts[r_symndx] > 0) 1518 local_got_refcounts[r_symndx] -= 1; 1519 } 1520 break; 1521 1522 default: 1523 break; 1524 } 1525 } 1526 1527 return TRUE; 1528} 1529 1530/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT 1531 entry but we found we will not create any. Called when we find we will 1532 not have any PLT for this symbol, by for example 1533 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, 1534 or elf_s390_size_dynamic_sections if no dynamic sections will be 1535 created (we're only linking static objects). */ 1536 1537static void 1538elf_s390_adjust_gotplt (h) 1539 struct elf_s390_link_hash_entry *h; 1540{ 1541 if (h->elf.root.type == bfd_link_hash_warning) 1542 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; 1543 1544 if (h->gotplt_refcount <= 0) 1545 return; 1546 1547 /* We simply add the number of gotplt references to the number 1548 * of got references for this symbol. */ 1549 h->elf.got.refcount += h->gotplt_refcount; 1550 h->gotplt_refcount = -1; 1551} 1552 1553/* Adjust a symbol defined by a dynamic object and referenced by a 1554 regular object. The current definition is in some section of the 1555 dynamic object, but we're not including those sections. We have to 1556 change the definition to something the rest of the link can 1557 understand. */ 1558 1559static bfd_boolean 1560elf_s390_adjust_dynamic_symbol (info, h) 1561 struct bfd_link_info *info; 1562 struct elf_link_hash_entry *h; 1563{ 1564 struct elf_s390_link_hash_table *htab; 1565 asection *s; 1566 unsigned int power_of_two; 1567 1568 /* If this is a function, put it in the procedure linkage table. We 1569 will fill in the contents of the procedure linkage table later 1570 (although we could actually do it here). */ 1571 if (h->type == STT_FUNC 1572 || h->needs_plt) 1573 { 1574 if (h->plt.refcount <= 0 1575 || (! info->shared 1576 && !h->def_dynamic 1577 && !h->ref_dynamic 1578 && h->root.type != bfd_link_hash_undefweak 1579 && h->root.type != bfd_link_hash_undefined)) 1580 { 1581 /* This case can occur if we saw a PLT32 reloc in an input 1582 file, but the symbol was never referred to by a dynamic 1583 object, or if all references were garbage collected. In 1584 such a case, we don't actually need to build a procedure 1585 linkage table, and we can just do a PC32 reloc instead. */ 1586 h->plt.offset = (bfd_vma) -1; 1587 h->needs_plt = 0; 1588 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1589 } 1590 1591 return TRUE; 1592 } 1593 else 1594 /* It's possible that we incorrectly decided a .plt reloc was 1595 needed for an R_390_PC32 reloc to a non-function sym in 1596 check_relocs. We can't decide accurately between function and 1597 non-function syms in check-relocs; Objects loaded later in 1598 the link may change h->type. So fix it now. */ 1599 h->plt.offset = (bfd_vma) -1; 1600 1601 /* If this is a weak symbol, and there is a real definition, the 1602 processor independent code will have arranged for us to see the 1603 real definition first, and we can just use the same value. */ 1604 if (h->u.weakdef != NULL) 1605 { 1606 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 1607 || h->u.weakdef->root.type == bfd_link_hash_defweak); 1608 h->root.u.def.section = h->u.weakdef->root.u.def.section; 1609 h->root.u.def.value = h->u.weakdef->root.u.def.value; 1610 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) 1611 h->non_got_ref = h->u.weakdef->non_got_ref; 1612 return TRUE; 1613 } 1614 1615 /* This is a reference to a symbol defined by a dynamic object which 1616 is not a function. */ 1617 1618 /* If we are creating a shared library, we must presume that the 1619 only references to the symbol are via the global offset table. 1620 For such cases we need not do anything here; the relocations will 1621 be handled correctly by relocate_section. */ 1622 if (info->shared) 1623 return TRUE; 1624 1625 /* If there are no references to this symbol that do not use the 1626 GOT, we don't need to generate a copy reloc. */ 1627 if (!h->non_got_ref) 1628 return TRUE; 1629 1630 /* If -z nocopyreloc was given, we won't generate them either. */ 1631 if (info->nocopyreloc) 1632 { 1633 h->non_got_ref = 0; 1634 return TRUE; 1635 } 1636 1637 if (ELIMINATE_COPY_RELOCS) 1638 { 1639 struct elf_s390_link_hash_entry * eh; 1640 struct elf_s390_dyn_relocs *p; 1641 1642 eh = (struct elf_s390_link_hash_entry *) h; 1643 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1644 { 1645 s = p->sec->output_section; 1646 if (s != NULL && (s->flags & SEC_READONLY) != 0) 1647 break; 1648 } 1649 1650 /* If we didn't find any dynamic relocs in read-only sections, then 1651 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 1652 if (p == NULL) 1653 { 1654 h->non_got_ref = 0; 1655 return TRUE; 1656 } 1657 } 1658 1659 if (h->size == 0) 1660 { 1661 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), 1662 h->root.root.string); 1663 return TRUE; 1664 } 1665 1666 /* We must allocate the symbol in our .dynbss section, which will 1667 become part of the .bss section of the executable. There will be 1668 an entry for this symbol in the .dynsym section. The dynamic 1669 object will contain position independent code, so all references 1670 from the dynamic object to this symbol will go through the global 1671 offset table. The dynamic linker will use the .dynsym entry to 1672 determine the address it must put in the global offset table, so 1673 both the dynamic object and the regular object will refer to the 1674 same memory location for the variable. */ 1675 1676 htab = elf_s390_hash_table (info); 1677 1678 /* We must generate a R_390_COPY reloc to tell the dynamic linker to 1679 copy the initial value out of the dynamic object and into the 1680 runtime process image. */ 1681 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) 1682 { 1683 htab->srelbss->size += sizeof (Elf32_External_Rela); 1684 h->needs_copy = 1; 1685 } 1686 1687 /* We need to figure out the alignment required for this symbol. I 1688 have no idea how ELF linkers handle this. */ 1689 power_of_two = bfd_log2 (h->size); 1690 if (power_of_two > 3) 1691 power_of_two = 3; 1692 1693 /* Apply the required alignment. */ 1694 s = htab->sdynbss; 1695 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); 1696 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) 1697 { 1698 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) 1699 return FALSE; 1700 } 1701 1702 /* Define the symbol as being at this point in the section. */ 1703 h->root.u.def.section = s; 1704 h->root.u.def.value = s->size; 1705 1706 /* Increment the section size to make room for the symbol. */ 1707 s->size += h->size; 1708 1709 return TRUE; 1710} 1711 1712/* Allocate space in .plt, .got and associated reloc sections for 1713 dynamic relocs. */ 1714 1715static bfd_boolean 1716allocate_dynrelocs (h, inf) 1717 struct elf_link_hash_entry *h; 1718 PTR inf; 1719{ 1720 struct bfd_link_info *info; 1721 struct elf_s390_link_hash_table *htab; 1722 struct elf_s390_link_hash_entry *eh; 1723 struct elf_s390_dyn_relocs *p; 1724 1725 if (h->root.type == bfd_link_hash_indirect) 1726 return TRUE; 1727 1728 if (h->root.type == bfd_link_hash_warning) 1729 /* When warning symbols are created, they **replace** the "real" 1730 entry in the hash table, thus we never get to see the real 1731 symbol in a hash traversal. So look at it now. */ 1732 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1733 1734 info = (struct bfd_link_info *) inf; 1735 htab = elf_s390_hash_table (info); 1736 1737 if (htab->elf.dynamic_sections_created 1738 && h->plt.refcount > 0 1739 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1740 || h->root.type != bfd_link_hash_undefweak)) 1741 { 1742 /* Make sure this symbol is output as a dynamic symbol. 1743 Undefined weak syms won't yet be marked as dynamic. */ 1744 if (h->dynindx == -1 1745 && !h->forced_local) 1746 { 1747 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1748 return FALSE; 1749 } 1750 1751 if (info->shared 1752 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) 1753 { 1754 asection *s = htab->splt; 1755 1756 /* If this is the first .plt entry, make room for the special 1757 first entry. */ 1758 if (s->size == 0) 1759 s->size += PLT_FIRST_ENTRY_SIZE; 1760 1761 h->plt.offset = s->size; 1762 1763 /* If this symbol is not defined in a regular file, and we are 1764 not generating a shared library, then set the symbol to this 1765 location in the .plt. This is required to make function 1766 pointers compare as equal between the normal executable and 1767 the shared library. */ 1768 if (! info->shared 1769 && !h->def_regular) 1770 { 1771 h->root.u.def.section = s; 1772 h->root.u.def.value = h->plt.offset; 1773 } 1774 1775 /* Make room for this entry. */ 1776 s->size += PLT_ENTRY_SIZE; 1777 1778 /* We also need to make an entry in the .got.plt section, which 1779 will be placed in the .got section by the linker script. */ 1780 htab->sgotplt->size += GOT_ENTRY_SIZE; 1781 1782 /* We also need to make an entry in the .rela.plt section. */ 1783 htab->srelplt->size += sizeof (Elf32_External_Rela); 1784 } 1785 else 1786 { 1787 h->plt.offset = (bfd_vma) -1; 1788 h->needs_plt = 0; 1789 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1790 } 1791 } 1792 else 1793 { 1794 h->plt.offset = (bfd_vma) -1; 1795 h->needs_plt = 0; 1796 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1797 } 1798 1799 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to 1800 the binary, we can optimize a bit. IE32 and GOTIE32 get converted 1801 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT 1802 we can save the dynamic TLS relocation. */ 1803 if (h->got.refcount > 0 1804 && !info->shared 1805 && h->dynindx == -1 1806 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) 1807 { 1808 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) 1809 /* For the GOTIE access without a literal pool entry the offset has 1810 to be stored somewhere. The immediate value in the instruction 1811 is not bit enough so the value is stored in the got. */ 1812 { 1813 h->got.offset = htab->sgot->size; 1814 htab->sgot->size += GOT_ENTRY_SIZE; 1815 } 1816 else 1817 h->got.offset = (bfd_vma) -1; 1818 } 1819 else if (h->got.refcount > 0) 1820 { 1821 asection *s; 1822 bfd_boolean dyn; 1823 int tls_type = elf_s390_hash_entry(h)->tls_type; 1824 1825 /* Make sure this symbol is output as a dynamic symbol. 1826 Undefined weak syms won't yet be marked as dynamic. */ 1827 if (h->dynindx == -1 1828 && !h->forced_local) 1829 { 1830 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1831 return FALSE; 1832 } 1833 1834 s = htab->sgot; 1835 h->got.offset = s->size; 1836 s->size += GOT_ENTRY_SIZE; 1837 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */ 1838 if (tls_type == GOT_TLS_GD) 1839 s->size += GOT_ENTRY_SIZE; 1840 dyn = htab->elf.dynamic_sections_created; 1841 /* R_390_TLS_IE32 needs one dynamic relocation, 1842 R_390_TLS_GD32 needs one if local symbol and two if global. */ 1843 if ((tls_type == GOT_TLS_GD && h->dynindx == -1) 1844 || tls_type >= GOT_TLS_IE) 1845 htab->srelgot->size += sizeof (Elf32_External_Rela); 1846 else if (tls_type == GOT_TLS_GD) 1847 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela); 1848 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1849 || h->root.type != bfd_link_hash_undefweak) 1850 && (info->shared 1851 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) 1852 htab->srelgot->size += sizeof (Elf32_External_Rela); 1853 } 1854 else 1855 h->got.offset = (bfd_vma) -1; 1856 1857 eh = (struct elf_s390_link_hash_entry *) h; 1858 if (eh->dyn_relocs == NULL) 1859 return TRUE; 1860 1861 /* In the shared -Bsymbolic case, discard space allocated for 1862 dynamic pc-relative relocs against symbols which turn out to be 1863 defined in regular objects. For the normal shared case, discard 1864 space for pc-relative relocs that have become local due to symbol 1865 visibility changes. */ 1866 1867 if (info->shared) 1868 { 1869 if (SYMBOL_REFERENCES_LOCAL (info, h)) 1870 { 1871 struct elf_s390_dyn_relocs **pp; 1872 1873 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 1874 { 1875 p->count -= p->pc_count; 1876 p->pc_count = 0; 1877 if (p->count == 0) 1878 *pp = p->next; 1879 else 1880 pp = &p->next; 1881 } 1882 } 1883 1884 /* Also discard relocs on undefined weak syms with non-default 1885 visibility. */ 1886 if (eh->dyn_relocs != NULL 1887 && h->root.type == bfd_link_hash_undefweak) 1888 { 1889 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 1890 eh->dyn_relocs = NULL; 1891 1892 /* Make sure undefined weak symbols are output as a dynamic 1893 symbol in PIEs. */ 1894 else if (h->dynindx == -1 1895 && !h->forced_local) 1896 { 1897 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1898 return FALSE; 1899 } 1900 } 1901 } 1902 else if (ELIMINATE_COPY_RELOCS) 1903 { 1904 /* For the non-shared case, discard space for relocs against 1905 symbols which turn out to need copy relocs or are not 1906 dynamic. */ 1907 1908 if (!h->non_got_ref 1909 && ((h->def_dynamic 1910 && !h->def_regular) 1911 || (htab->elf.dynamic_sections_created 1912 && (h->root.type == bfd_link_hash_undefweak 1913 || h->root.type == bfd_link_hash_undefined)))) 1914 { 1915 /* Make sure this symbol is output as a dynamic symbol. 1916 Undefined weak syms won't yet be marked as dynamic. */ 1917 if (h->dynindx == -1 1918 && !h->forced_local) 1919 { 1920 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1921 return FALSE; 1922 } 1923 1924 /* If that succeeded, we know we'll be keeping all the 1925 relocs. */ 1926 if (h->dynindx != -1) 1927 goto keep; 1928 } 1929 1930 eh->dyn_relocs = NULL; 1931 1932 keep: ; 1933 } 1934 1935 /* Finally, allocate space. */ 1936 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1937 { 1938 asection *sreloc = elf_section_data (p->sec)->sreloc; 1939 1940 sreloc->size += p->count * sizeof (Elf32_External_Rela); 1941 } 1942 1943 return TRUE; 1944} 1945 1946/* Find any dynamic relocs that apply to read-only sections. */ 1947 1948static bfd_boolean 1949readonly_dynrelocs (h, inf) 1950 struct elf_link_hash_entry *h; 1951 PTR inf; 1952{ 1953 struct elf_s390_link_hash_entry *eh; 1954 struct elf_s390_dyn_relocs *p; 1955 1956 if (h->root.type == bfd_link_hash_warning) 1957 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1958 1959 eh = (struct elf_s390_link_hash_entry *) h; 1960 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1961 { 1962 asection *s = p->sec->output_section; 1963 1964 if (s != NULL && (s->flags & SEC_READONLY) != 0) 1965 { 1966 struct bfd_link_info *info = (struct bfd_link_info *) inf; 1967 1968 info->flags |= DF_TEXTREL; 1969 1970 /* Not an error, just cut short the traversal. */ 1971 return FALSE; 1972 } 1973 } 1974 return TRUE; 1975} 1976 1977/* Set the sizes of the dynamic sections. */ 1978 1979static bfd_boolean 1980elf_s390_size_dynamic_sections (output_bfd, info) 1981 bfd *output_bfd ATTRIBUTE_UNUSED; 1982 struct bfd_link_info *info; 1983{ 1984 struct elf_s390_link_hash_table *htab; 1985 bfd *dynobj; 1986 asection *s; 1987 bfd_boolean relocs; 1988 bfd *ibfd; 1989 1990 htab = elf_s390_hash_table (info); 1991 dynobj = htab->elf.dynobj; 1992 if (dynobj == NULL) 1993 abort (); 1994 1995 if (htab->elf.dynamic_sections_created) 1996 { 1997 /* Set the contents of the .interp section to the interpreter. */ 1998 if (info->executable) 1999 { 2000 s = bfd_get_section_by_name (dynobj, ".interp"); 2001 if (s == NULL) 2002 abort (); 2003 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 2004 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 2005 } 2006 } 2007 2008 /* Set up .got offsets for local syms, and space for local dynamic 2009 relocs. */ 2010 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 2011 { 2012 bfd_signed_vma *local_got; 2013 bfd_signed_vma *end_local_got; 2014 char *local_tls_type; 2015 bfd_size_type locsymcount; 2016 Elf_Internal_Shdr *symtab_hdr; 2017 asection *srela; 2018 2019 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 2020 continue; 2021 2022 for (s = ibfd->sections; s != NULL; s = s->next) 2023 { 2024 struct elf_s390_dyn_relocs *p; 2025 2026 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) 2027 { 2028 if (!bfd_is_abs_section (p->sec) 2029 && bfd_is_abs_section (p->sec->output_section)) 2030 { 2031 /* Input section has been discarded, either because 2032 it is a copy of a linkonce section or due to 2033 linker script /DISCARD/, so we'll be discarding 2034 the relocs too. */ 2035 } 2036 else if (p->count != 0) 2037 { 2038 srela = elf_section_data (p->sec)->sreloc; 2039 srela->size += p->count * sizeof (Elf32_External_Rela); 2040 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2041 info->flags |= DF_TEXTREL; 2042 } 2043 } 2044 } 2045 2046 local_got = elf_local_got_refcounts (ibfd); 2047 if (!local_got) 2048 continue; 2049 2050 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2051 locsymcount = symtab_hdr->sh_info; 2052 end_local_got = local_got + locsymcount; 2053 local_tls_type = elf_s390_local_got_tls_type (ibfd); 2054 s = htab->sgot; 2055 srela = htab->srelgot; 2056 for (; local_got < end_local_got; ++local_got, ++local_tls_type) 2057 { 2058 if (*local_got > 0) 2059 { 2060 *local_got = s->size; 2061 s->size += GOT_ENTRY_SIZE; 2062 if (*local_tls_type == GOT_TLS_GD) 2063 s->size += GOT_ENTRY_SIZE; 2064 if (info->shared) 2065 srela->size += sizeof (Elf32_External_Rela); 2066 } 2067 else 2068 *local_got = (bfd_vma) -1; 2069 } 2070 } 2071 2072 if (htab->tls_ldm_got.refcount > 0) 2073 { 2074 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32 2075 relocs. */ 2076 htab->tls_ldm_got.offset = htab->sgot->size; 2077 htab->sgot->size += 2 * GOT_ENTRY_SIZE; 2078 htab->srelgot->size += sizeof (Elf32_External_Rela); 2079 } 2080 else 2081 htab->tls_ldm_got.offset = -1; 2082 2083 /* Allocate global sym .plt and .got entries, and space for global 2084 sym dynamic relocs. */ 2085 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); 2086 2087 /* We now have determined the sizes of the various dynamic sections. 2088 Allocate memory for them. */ 2089 relocs = FALSE; 2090 for (s = dynobj->sections; s != NULL; s = s->next) 2091 { 2092 if ((s->flags & SEC_LINKER_CREATED) == 0) 2093 continue; 2094 2095 if (s == htab->splt 2096 || s == htab->sgot 2097 || s == htab->sgotplt 2098 || s == htab->sdynbss) 2099 { 2100 /* Strip this section if we don't need it; see the 2101 comment below. */ 2102 } 2103 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) 2104 { 2105 if (s->size != 0) 2106 relocs = TRUE; 2107 2108 /* We use the reloc_count field as a counter if we need 2109 to copy relocs into the output file. */ 2110 s->reloc_count = 0; 2111 } 2112 else 2113 { 2114 /* It's not one of our sections, so don't allocate space. */ 2115 continue; 2116 } 2117 2118 if (s->size == 0) 2119 { 2120 /* If we don't need this section, strip it from the 2121 output file. This is to handle .rela.bss and 2122 .rela.plt. We must create it in 2123 create_dynamic_sections, because it must be created 2124 before the linker maps input sections to output 2125 sections. The linker does that before 2126 adjust_dynamic_symbol is called, and it is that 2127 function which decides whether anything needs to go 2128 into these sections. */ 2129 2130 s->flags |= SEC_EXCLUDE; 2131 continue; 2132 } 2133 2134 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2135 continue; 2136 2137 /* Allocate memory for the section contents. We use bfd_zalloc 2138 here in case unused entries are not reclaimed before the 2139 section's contents are written out. This should not happen, 2140 but this way if it does, we get a R_390_NONE reloc instead 2141 of garbage. */ 2142 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 2143 if (s->contents == NULL) 2144 return FALSE; 2145 } 2146 2147 if (htab->elf.dynamic_sections_created) 2148 { 2149 /* Add some entries to the .dynamic section. We fill in the 2150 values later, in elf_s390_finish_dynamic_sections, but we 2151 must add the entries now so that we get the correct size for 2152 the .dynamic section. The DT_DEBUG entry is filled in by the 2153 dynamic linker and used by the debugger. */ 2154#define add_dynamic_entry(TAG, VAL) \ 2155 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2156 2157 if (info->executable) 2158 { 2159 if (!add_dynamic_entry (DT_DEBUG, 0)) 2160 return FALSE; 2161 } 2162 2163 if (htab->splt->size != 0) 2164 { 2165 if (!add_dynamic_entry (DT_PLTGOT, 0) 2166 || !add_dynamic_entry (DT_PLTRELSZ, 0) 2167 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 2168 || !add_dynamic_entry (DT_JMPREL, 0)) 2169 return FALSE; 2170 } 2171 2172 if (relocs) 2173 { 2174 if (!add_dynamic_entry (DT_RELA, 0) 2175 || !add_dynamic_entry (DT_RELASZ, 0) 2176 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 2177 return FALSE; 2178 2179 /* If any dynamic relocs apply to a read-only section, 2180 then we need a DT_TEXTREL entry. */ 2181 if ((info->flags & DF_TEXTREL) == 0) 2182 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, 2183 (PTR) info); 2184 2185 if ((info->flags & DF_TEXTREL) != 0) 2186 { 2187 if (!add_dynamic_entry (DT_TEXTREL, 0)) 2188 return FALSE; 2189 } 2190 } 2191 } 2192#undef add_dynamic_entry 2193 2194 return TRUE; 2195} 2196 2197/* Return the base VMA address which should be subtracted from real addresses 2198 when resolving @dtpoff relocation. 2199 This is PT_TLS segment p_vaddr. */ 2200 2201static bfd_vma 2202dtpoff_base (info) 2203 struct bfd_link_info *info; 2204{ 2205 /* If tls_sec is NULL, we should have signalled an error already. */ 2206 if (elf_hash_table (info)->tls_sec == NULL) 2207 return 0; 2208 return elf_hash_table (info)->tls_sec->vma; 2209} 2210 2211/* Return the relocation value for @tpoff relocation 2212 if STT_TLS virtual address is ADDRESS. */ 2213 2214static bfd_vma 2215tpoff (info, address) 2216 struct bfd_link_info *info; 2217 bfd_vma address; 2218{ 2219 struct elf_link_hash_table *htab = elf_hash_table (info); 2220 2221 /* If tls_sec is NULL, we should have signalled an error already. */ 2222 if (htab->tls_sec == NULL) 2223 return 0; 2224 return htab->tls_size + htab->tls_sec->vma - address; 2225} 2226 2227/* Complain if TLS instruction relocation is against an invalid 2228 instruction. */ 2229 2230static void 2231invalid_tls_insn (input_bfd, input_section, rel) 2232 bfd *input_bfd; 2233 asection *input_section; 2234 Elf_Internal_Rela *rel; 2235{ 2236 reloc_howto_type *howto; 2237 2238 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info); 2239 (*_bfd_error_handler) 2240 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"), 2241 input_bfd, 2242 input_section, 2243 (long) rel->r_offset, 2244 howto->name); 2245 bfd_set_error (bfd_error_bad_value); 2246} 2247 2248/* Relocate a 390 ELF section. */ 2249 2250static bfd_boolean 2251elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, 2252 contents, relocs, local_syms, local_sections) 2253 bfd *output_bfd; 2254 struct bfd_link_info *info; 2255 bfd *input_bfd; 2256 asection *input_section; 2257 bfd_byte *contents; 2258 Elf_Internal_Rela *relocs; 2259 Elf_Internal_Sym *local_syms; 2260 asection **local_sections; 2261{ 2262 struct elf_s390_link_hash_table *htab; 2263 Elf_Internal_Shdr *symtab_hdr; 2264 struct elf_link_hash_entry **sym_hashes; 2265 bfd_vma *local_got_offsets; 2266 Elf_Internal_Rela *rel; 2267 Elf_Internal_Rela *relend; 2268 2269 if (info->relocatable) 2270 return TRUE; 2271 2272 htab = elf_s390_hash_table (info); 2273 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 2274 sym_hashes = elf_sym_hashes (input_bfd); 2275 local_got_offsets = elf_local_got_offsets (input_bfd); 2276 2277 rel = relocs; 2278 relend = relocs + input_section->reloc_count; 2279 for (; rel < relend; rel++) 2280 { 2281 unsigned int r_type; 2282 reloc_howto_type *howto; 2283 unsigned long r_symndx; 2284 struct elf_link_hash_entry *h; 2285 Elf_Internal_Sym *sym; 2286 asection *sec; 2287 bfd_vma off; 2288 bfd_vma relocation; 2289 bfd_boolean unresolved_reloc; 2290 bfd_reloc_status_type r; 2291 int tls_type; 2292 2293 r_type = ELF32_R_TYPE (rel->r_info); 2294 if (r_type == (int) R_390_GNU_VTINHERIT 2295 || r_type == (int) R_390_GNU_VTENTRY) 2296 continue; 2297 if (r_type >= (int) R_390_max) 2298 { 2299 bfd_set_error (bfd_error_bad_value); 2300 return FALSE; 2301 } 2302 2303 howto = elf_howto_table + r_type; 2304 r_symndx = ELF32_R_SYM (rel->r_info); 2305 2306 /* This is a final link. */ 2307 h = NULL; 2308 sym = NULL; 2309 sec = NULL; 2310 unresolved_reloc = FALSE; 2311 if (r_symndx < symtab_hdr->sh_info) 2312 { 2313 sym = local_syms + r_symndx; 2314 sec = local_sections[r_symndx]; 2315 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2316 } 2317 else 2318 { 2319 bfd_boolean warned ATTRIBUTE_UNUSED; 2320 2321 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 2322 r_symndx, symtab_hdr, sym_hashes, 2323 h, sec, relocation, 2324 unresolved_reloc, warned); 2325 } 2326 2327 switch (r_type) 2328 { 2329 case R_390_GOTPLT12: 2330 case R_390_GOTPLT16: 2331 case R_390_GOTPLT20: 2332 case R_390_GOTPLT32: 2333 case R_390_GOTPLTENT: 2334 /* There are three cases for a GOTPLT relocation. 1) The 2335 relocation is against the jump slot entry of a plt that 2336 will get emitted to the output file. 2) The relocation 2337 is against the jump slot of a plt entry that has been 2338 removed. elf_s390_adjust_gotplt has created a GOT entry 2339 as replacement. 3) The relocation is against a local symbol. 2340 Cases 2) and 3) are the same as the GOT relocation code 2341 so we just have to test for case 1 and fall through for 2342 the other two. */ 2343 if (h != NULL && h->plt.offset != (bfd_vma) -1) 2344 { 2345 bfd_vma plt_index; 2346 2347 /* Calc. index no. 2348 Current offset - size first entry / entry size. */ 2349 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / 2350 PLT_ENTRY_SIZE; 2351 2352 /* Offset in GOT is PLT index plus GOT headers(3) times 4, 2353 addr & GOT addr. */ 2354 relocation = (plt_index + 3) * GOT_ENTRY_SIZE; 2355 unresolved_reloc = FALSE; 2356 2357 if (r_type == R_390_GOTPLTENT) 2358 relocation += htab->sgot->output_section->vma; 2359 break; 2360 } 2361 /* Fall through. */ 2362 2363 case R_390_GOT12: 2364 case R_390_GOT16: 2365 case R_390_GOT20: 2366 case R_390_GOT32: 2367 case R_390_GOTENT: 2368 /* Relocation is to the entry for this symbol in the global 2369 offset table. */ 2370 if (htab->sgot == NULL) 2371 abort (); 2372 2373 if (h != NULL) 2374 { 2375 bfd_boolean dyn; 2376 2377 off = h->got.offset; 2378 dyn = htab->elf.dynamic_sections_created; 2379 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 2380 || (info->shared 2381 && (info->symbolic 2382 || h->dynindx == -1 2383 || h->forced_local) 2384 && h->def_regular) 2385 || (ELF_ST_VISIBILITY (h->other) 2386 && h->root.type == bfd_link_hash_undefweak)) 2387 { 2388 /* This is actually a static link, or it is a 2389 -Bsymbolic link and the symbol is defined 2390 locally, or the symbol was forced to be local 2391 because of a version file. We must initialize 2392 this entry in the global offset table. Since the 2393 offset must always be a multiple of 2, we use the 2394 least significant bit to record whether we have 2395 initialized it already. 2396 2397 When doing a dynamic link, we create a .rel.got 2398 relocation entry to initialize the value. This 2399 is done in the finish_dynamic_symbol routine. */ 2400 if ((off & 1) != 0) 2401 off &= ~1; 2402 else 2403 { 2404 bfd_put_32 (output_bfd, relocation, 2405 htab->sgot->contents + off); 2406 h->got.offset |= 1; 2407 } 2408 } 2409 else 2410 unresolved_reloc = FALSE; 2411 } 2412 else 2413 { 2414 if (local_got_offsets == NULL) 2415 abort (); 2416 2417 off = local_got_offsets[r_symndx]; 2418 2419 /* The offset must always be a multiple of 4. We use 2420 the least significant bit to record whether we have 2421 already generated the necessary reloc. */ 2422 if ((off & 1) != 0) 2423 off &= ~1; 2424 else 2425 { 2426 bfd_put_32 (output_bfd, relocation, 2427 htab->sgot->contents + off); 2428 2429 if (info->shared) 2430 { 2431 asection *srelgot; 2432 Elf_Internal_Rela outrel; 2433 bfd_byte *loc; 2434 2435 srelgot = htab->srelgot; 2436 if (srelgot == NULL) 2437 abort (); 2438 2439 outrel.r_offset = (htab->sgot->output_section->vma 2440 + htab->sgot->output_offset 2441 + off); 2442 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 2443 outrel.r_addend = relocation; 2444 loc = srelgot->contents; 2445 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 2446 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2447 } 2448 2449 local_got_offsets[r_symndx] |= 1; 2450 } 2451 } 2452 2453 if (off >= (bfd_vma) -2) 2454 abort (); 2455 2456 relocation = htab->sgot->output_offset + off; 2457 2458 /* For @GOTENT the relocation is against the offset between 2459 the instruction and the symbols entry in the GOT and not 2460 between the start of the GOT and the symbols entry. We 2461 add the vma of the GOT to get the correct value. */ 2462 if ( r_type == R_390_GOTENT 2463 || r_type == R_390_GOTPLTENT) 2464 relocation += htab->sgot->output_section->vma; 2465 2466 break; 2467 2468 case R_390_GOTOFF16: 2469 case R_390_GOTOFF32: 2470 /* Relocation is relative to the start of the global offset 2471 table. */ 2472 2473 /* Note that sgot->output_offset is not involved in this 2474 calculation. We always want the start of .got. If we 2475 defined _GLOBAL_OFFSET_TABLE in a different way, as is 2476 permitted by the ABI, we might have to change this 2477 calculation. */ 2478 relocation -= htab->sgot->output_section->vma; 2479 break; 2480 2481 case R_390_GOTPC: 2482 case R_390_GOTPCDBL: 2483 /* Use global offset table as symbol value. */ 2484 relocation = htab->sgot->output_section->vma; 2485 unresolved_reloc = FALSE; 2486 break; 2487 2488 case R_390_PLT16DBL: 2489 case R_390_PLT32DBL: 2490 case R_390_PLT32: 2491 /* Relocation is to the entry for this symbol in the 2492 procedure linkage table. */ 2493 2494 /* Resolve a PLT32 reloc against a local symbol directly, 2495 without using the procedure linkage table. */ 2496 if (h == NULL) 2497 break; 2498 2499 if (h->plt.offset == (bfd_vma) -1 2500 || htab->splt == NULL) 2501 { 2502 /* We didn't make a PLT entry for this symbol. This 2503 happens when statically linking PIC code, or when 2504 using -Bsymbolic. */ 2505 break; 2506 } 2507 2508 relocation = (htab->splt->output_section->vma 2509 + htab->splt->output_offset 2510 + h->plt.offset); 2511 unresolved_reloc = FALSE; 2512 break; 2513 2514 case R_390_PLTOFF16: 2515 case R_390_PLTOFF32: 2516 /* Relocation is to the entry for this symbol in the 2517 procedure linkage table relative to the start of the GOT. */ 2518 2519 /* For local symbols or if we didn't make a PLT entry for 2520 this symbol resolve the symbol directly. */ 2521 if ( h == NULL 2522 || h->plt.offset == (bfd_vma) -1 2523 || htab->splt == NULL) 2524 { 2525 relocation -= htab->sgot->output_section->vma; 2526 break; 2527 } 2528 2529 relocation = (htab->splt->output_section->vma 2530 + htab->splt->output_offset 2531 + h->plt.offset 2532 - htab->sgot->output_section->vma); 2533 unresolved_reloc = FALSE; 2534 break; 2535 2536 case R_390_8: 2537 case R_390_16: 2538 case R_390_32: 2539 case R_390_PC16: 2540 case R_390_PC16DBL: 2541 case R_390_PC32DBL: 2542 case R_390_PC32: 2543 /* r_symndx will be zero only for relocs against symbols 2544 from removed linkonce sections, or sections discarded by 2545 a linker script. */ 2546 if (r_symndx == 0) 2547 { 2548 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); 2549 break; 2550 } 2551 2552 if ((input_section->flags & SEC_ALLOC) == 0) 2553 break; 2554 2555 if ((info->shared 2556 && (h == NULL 2557 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 2558 || h->root.type != bfd_link_hash_undefweak) 2559 && ((r_type != R_390_PC16 2560 && r_type != R_390_PC16DBL 2561 && r_type != R_390_PC32DBL 2562 && r_type != R_390_PC32) 2563 || (h != NULL 2564 && !SYMBOL_REFERENCES_LOCAL (info, h)))) 2565 || (ELIMINATE_COPY_RELOCS 2566 && !info->shared 2567 && h != NULL 2568 && h->dynindx != -1 2569 && !h->non_got_ref 2570 && ((h->def_dynamic 2571 && !h->def_regular) 2572 || h->root.type == bfd_link_hash_undefweak 2573 || h->root.type == bfd_link_hash_undefined))) 2574 { 2575 Elf_Internal_Rela outrel; 2576 bfd_boolean skip, relocate; 2577 asection *sreloc; 2578 bfd_byte *loc; 2579 2580 /* When generating a shared object, these relocations 2581 are copied into the output file to be resolved at run 2582 time. */ 2583 2584 skip = FALSE; 2585 relocate = FALSE; 2586 2587 outrel.r_offset = 2588 _bfd_elf_section_offset (output_bfd, info, input_section, 2589 rel->r_offset); 2590 if (outrel.r_offset == (bfd_vma) -1) 2591 skip = TRUE; 2592 else if (outrel.r_offset == (bfd_vma) -2) 2593 skip = TRUE, relocate = TRUE; 2594 outrel.r_offset += (input_section->output_section->vma 2595 + input_section->output_offset); 2596 2597 if (skip) 2598 memset (&outrel, 0, sizeof outrel); 2599 else if (h != NULL 2600 && h->dynindx != -1 2601 && (r_type == R_390_PC16 2602 || r_type == R_390_PC16DBL 2603 || r_type == R_390_PC32DBL 2604 || r_type == R_390_PC32 2605 || !info->shared 2606 || !info->symbolic 2607 || !h->def_regular)) 2608 { 2609 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 2610 outrel.r_addend = rel->r_addend; 2611 } 2612 else 2613 { 2614 /* This symbol is local, or marked to become local. */ 2615 outrel.r_addend = relocation + rel->r_addend; 2616 if (r_type == R_390_32) 2617 { 2618 relocate = TRUE; 2619 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 2620 } 2621 else 2622 { 2623 long sindx; 2624 2625 if (bfd_is_abs_section (sec)) 2626 sindx = 0; 2627 else if (sec == NULL || sec->owner == NULL) 2628 { 2629 bfd_set_error(bfd_error_bad_value); 2630 return FALSE; 2631 } 2632 else 2633 { 2634 asection *osec; 2635 2636 osec = sec->output_section; 2637 sindx = elf_section_data (osec)->dynindx; 2638 if (sindx == 0) 2639 { 2640 osec = htab->elf.text_index_section; 2641 sindx = elf_section_data (osec)->dynindx; 2642 } 2643 BFD_ASSERT (sindx != 0); 2644 2645 /* We are turning this relocation into one 2646 against a section symbol, so subtract out 2647 the output section's address but not the 2648 offset of the input section in the output 2649 section. */ 2650 outrel.r_addend -= osec->vma; 2651 } 2652 outrel.r_info = ELF32_R_INFO (sindx, r_type); 2653 } 2654 } 2655 2656 sreloc = elf_section_data (input_section)->sreloc; 2657 if (sreloc == NULL) 2658 abort (); 2659 2660 loc = sreloc->contents; 2661 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 2662 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2663 2664 /* If this reloc is against an external symbol, we do 2665 not want to fiddle with the addend. Otherwise, we 2666 need to include the symbol value so that it becomes 2667 an addend for the dynamic reloc. */ 2668 if (! relocate) 2669 continue; 2670 } 2671 break; 2672 2673 /* Relocations for tls literal pool entries. */ 2674 case R_390_TLS_IE32: 2675 if (info->shared) 2676 { 2677 Elf_Internal_Rela outrel; 2678 asection *sreloc; 2679 bfd_byte *loc; 2680 2681 outrel.r_offset = rel->r_offset 2682 + input_section->output_section->vma 2683 + input_section->output_offset; 2684 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 2685 sreloc = elf_section_data (input_section)->sreloc; 2686 if (sreloc == NULL) 2687 abort (); 2688 loc = sreloc->contents; 2689 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 2690 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); 2691 } 2692 /* Fall through. */ 2693 2694 case R_390_TLS_GD32: 2695 case R_390_TLS_GOTIE32: 2696 r_type = elf_s390_tls_transition (info, r_type, h == NULL); 2697 tls_type = GOT_UNKNOWN; 2698 if (h == NULL && local_got_offsets) 2699 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 2700 else if (h != NULL) 2701 { 2702 tls_type = elf_s390_hash_entry(h)->tls_type; 2703 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) 2704 r_type = R_390_TLS_LE32; 2705 } 2706 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE) 2707 r_type = R_390_TLS_IE32; 2708 2709 if (r_type == R_390_TLS_LE32) 2710 { 2711 /* This relocation gets optimized away by the local exec 2712 access optimization. */ 2713 BFD_ASSERT (! unresolved_reloc); 2714 bfd_put_32 (output_bfd, -tpoff (info, relocation), 2715 contents + rel->r_offset); 2716 continue; 2717 } 2718 2719 if (htab->sgot == NULL) 2720 abort (); 2721 2722 if (h != NULL) 2723 off = h->got.offset; 2724 else 2725 { 2726 if (local_got_offsets == NULL) 2727 abort (); 2728 2729 off = local_got_offsets[r_symndx]; 2730 } 2731 2732 emit_tls_relocs: 2733 2734 if ((off & 1) != 0) 2735 off &= ~1; 2736 else 2737 { 2738 Elf_Internal_Rela outrel; 2739 bfd_byte *loc; 2740 int dr_type, indx; 2741 2742 if (htab->srelgot == NULL) 2743 abort (); 2744 2745 outrel.r_offset = (htab->sgot->output_section->vma 2746 + htab->sgot->output_offset + off); 2747 2748 indx = h && h->dynindx != -1 ? h->dynindx : 0; 2749 if (r_type == R_390_TLS_GD32) 2750 dr_type = R_390_TLS_DTPMOD; 2751 else 2752 dr_type = R_390_TLS_TPOFF; 2753 if (dr_type == R_390_TLS_TPOFF && indx == 0) 2754 outrel.r_addend = relocation - dtpoff_base (info); 2755 else 2756 outrel.r_addend = 0; 2757 outrel.r_info = ELF32_R_INFO (indx, dr_type); 2758 loc = htab->srelgot->contents; 2759 loc += htab->srelgot->reloc_count++ 2760 * sizeof (Elf32_External_Rela); 2761 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2762 2763 if (r_type == R_390_TLS_GD32) 2764 { 2765 if (indx == 0) 2766 { 2767 BFD_ASSERT (! unresolved_reloc); 2768 bfd_put_32 (output_bfd, 2769 relocation - dtpoff_base (info), 2770 htab->sgot->contents + off + GOT_ENTRY_SIZE); 2771 } 2772 else 2773 { 2774 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF); 2775 outrel.r_offset += GOT_ENTRY_SIZE; 2776 outrel.r_addend = 0; 2777 htab->srelgot->reloc_count++; 2778 loc += sizeof (Elf32_External_Rela); 2779 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2780 } 2781 } 2782 2783 if (h != NULL) 2784 h->got.offset |= 1; 2785 else 2786 local_got_offsets[r_symndx] |= 1; 2787 } 2788 2789 if (off >= (bfd_vma) -2) 2790 abort (); 2791 if (r_type == ELF32_R_TYPE (rel->r_info)) 2792 { 2793 relocation = htab->sgot->output_offset + off; 2794 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT) 2795 relocation += htab->sgot->output_section->vma; 2796 unresolved_reloc = FALSE; 2797 } 2798 else 2799 { 2800 bfd_put_32 (output_bfd, htab->sgot->output_offset + off, 2801 contents + rel->r_offset); 2802 continue; 2803 } 2804 break; 2805 2806 case R_390_TLS_GOTIE12: 2807 case R_390_TLS_GOTIE20: 2808 case R_390_TLS_IEENT: 2809 if (h == NULL) 2810 { 2811 if (local_got_offsets == NULL) 2812 abort(); 2813 off = local_got_offsets[r_symndx]; 2814 if (info->shared) 2815 goto emit_tls_relocs; 2816 } 2817 else 2818 { 2819 off = h->got.offset; 2820 tls_type = elf_s390_hash_entry(h)->tls_type; 2821 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) 2822 goto emit_tls_relocs; 2823 } 2824 2825 if (htab->sgot == NULL) 2826 abort (); 2827 2828 BFD_ASSERT (! unresolved_reloc); 2829 bfd_put_32 (output_bfd, -tpoff (info, relocation), 2830 htab->sgot->contents + off); 2831 relocation = htab->sgot->output_offset + off; 2832 if (r_type == R_390_TLS_IEENT) 2833 relocation += htab->sgot->output_section->vma; 2834 unresolved_reloc = FALSE; 2835 break; 2836 2837 case R_390_TLS_LDM32: 2838 if (! info->shared) 2839 /* The literal pool entry this relocation refers to gets ignored 2840 by the optimized code of the local exec model. Do nothing 2841 and the value will turn out zero. */ 2842 continue; 2843 2844 if (htab->sgot == NULL) 2845 abort (); 2846 2847 off = htab->tls_ldm_got.offset; 2848 if (off & 1) 2849 off &= ~1; 2850 else 2851 { 2852 Elf_Internal_Rela outrel; 2853 bfd_byte *loc; 2854 2855 if (htab->srelgot == NULL) 2856 abort (); 2857 2858 outrel.r_offset = (htab->sgot->output_section->vma 2859 + htab->sgot->output_offset + off); 2860 2861 bfd_put_32 (output_bfd, 0, 2862 htab->sgot->contents + off + GOT_ENTRY_SIZE); 2863 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD); 2864 outrel.r_addend = 0; 2865 loc = htab->srelgot->contents; 2866 loc += htab->srelgot->reloc_count++ 2867 * sizeof (Elf32_External_Rela); 2868 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2869 htab->tls_ldm_got.offset |= 1; 2870 } 2871 relocation = htab->sgot->output_offset + off; 2872 unresolved_reloc = FALSE; 2873 break; 2874 2875 case R_390_TLS_LE32: 2876 if (info->shared) 2877 { 2878 /* Linking a shared library with non-fpic code requires 2879 a R_390_TLS_TPOFF relocation. */ 2880 Elf_Internal_Rela outrel; 2881 asection *sreloc; 2882 bfd_byte *loc; 2883 int indx; 2884 2885 outrel.r_offset = rel->r_offset 2886 + input_section->output_section->vma 2887 + input_section->output_offset; 2888 if (h != NULL && h->dynindx != -1) 2889 indx = h->dynindx; 2890 else 2891 indx = 0; 2892 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF); 2893 if (indx == 0) 2894 outrel.r_addend = relocation - dtpoff_base (info); 2895 else 2896 outrel.r_addend = 0; 2897 sreloc = elf_section_data (input_section)->sreloc; 2898 if (sreloc == NULL) 2899 abort (); 2900 loc = sreloc->contents; 2901 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 2902 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2903 } 2904 else 2905 { 2906 BFD_ASSERT (! unresolved_reloc); 2907 bfd_put_32 (output_bfd, -tpoff (info, relocation), 2908 contents + rel->r_offset); 2909 } 2910 continue; 2911 2912 case R_390_TLS_LDO32: 2913 if (info->shared) 2914 relocation -= dtpoff_base (info); 2915 else 2916 /* When converting LDO to LE, we must negate. */ 2917 relocation = -tpoff (info, relocation); 2918 break; 2919 2920 /* Relocations for tls instructions. */ 2921 case R_390_TLS_LOAD: 2922 case R_390_TLS_GDCALL: 2923 case R_390_TLS_LDCALL: 2924 tls_type = GOT_UNKNOWN; 2925 if (h == NULL && local_got_offsets) 2926 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 2927 else if (h != NULL) 2928 tls_type = elf_s390_hash_entry(h)->tls_type; 2929 2930 if (tls_type == GOT_TLS_GD) 2931 continue; 2932 2933 if (r_type == R_390_TLS_LOAD) 2934 { 2935 if (!info->shared && (h == NULL || h->dynindx == -1)) 2936 { 2937 /* IE->LE transition. Four valid cases: 2938 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 2939 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 2940 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 2941 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ 2942 unsigned int insn, ry; 2943 2944 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 2945 ry = 0; 2946 if ((insn & 0xff00f000) == 0x58000000) 2947 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */ 2948 ry = (insn & 0x000f0000); 2949 else if ((insn & 0xff0f0000) == 0x58000000) 2950 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */ 2951 ry = (insn & 0x0000f000) << 4; 2952 else if ((insn & 0xff00f000) == 0x5800c000) 2953 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */ 2954 ry = (insn & 0x000f0000); 2955 else if ((insn & 0xff0f0000) == 0x580c0000) 2956 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ 2957 ry = (insn & 0x0000f000) << 4; 2958 else 2959 invalid_tls_insn (input_bfd, input_section, rel); 2960 insn = 0x18000700 | (insn & 0x00f00000) | ry; 2961 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 2962 } 2963 } 2964 else if (r_type == R_390_TLS_GDCALL) 2965 { 2966 unsigned int insn; 2967 2968 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 2969 if ((insn & 0xff000fff) != 0x4d000000 && 2970 (insn & 0xffff0000) != 0xc0e50000) 2971 invalid_tls_insn (input_bfd, input_section, rel); 2972 if (!info->shared && (h == NULL || h->dynindx == -1)) 2973 { 2974 if ((insn & 0xff000000) == 0x4d000000) 2975 { 2976 /* GD->LE transition. 2977 bas %r14,0(%rx,%r13) -> bc 0,0 */ 2978 insn = 0x47000000; 2979 } 2980 else 2981 { 2982 /* GD->LE transition. 2983 brasl %r14,_tls_get_addr@plt -> brcl 0,. */ 2984 insn = 0xc0040000; 2985 bfd_put_16 (output_bfd, 0x0000, 2986 contents + rel->r_offset + 4); 2987 } 2988 } 2989 else 2990 { 2991 if ((insn & 0xff000000) == 0x4d000000) 2992 { 2993 /* GD->IE transition. 2994 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */ 2995 insn = 0x5822c000; 2996 } 2997 else 2998 { 2999 /* GD->IE transition. 3000 brasl %r14,__tls_get_addr@plt -> 3001 l %r2,0(%r2,%r12) ; bcr 0,0 */ 3002 insn = 0x5822c000; 3003 bfd_put_16 (output_bfd, 0x0700, 3004 contents + rel->r_offset + 4); 3005 } 3006 } 3007 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 3008 } 3009 else if (r_type == R_390_TLS_LDCALL) 3010 { 3011 if (!info->shared) 3012 { 3013 unsigned int insn; 3014 3015 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 3016 if ((insn & 0xff000fff) != 0x4d000000 && 3017 (insn & 0xffff0000) != 0xc0e50000) 3018 invalid_tls_insn (input_bfd, input_section, rel); 3019 if ((insn & 0xff000000) == 0x4d000000) 3020 { 3021 /* LD->LE transition. 3022 bas %r14,0(%rx,%r13) -> bc 0,0 */ 3023 insn = 0x47000000; 3024 } 3025 else 3026 { 3027 /* LD->LE transition. 3028 brasl %r14,__tls_get_addr@plt -> brcl 0,. */ 3029 insn = 0xc0040000; 3030 bfd_put_16 (output_bfd, 0x0000, 3031 contents + rel->r_offset + 4); 3032 } 3033 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 3034 } 3035 } 3036 continue; 3037 3038 default: 3039 break; 3040 } 3041 3042 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections 3043 because such sections are not SEC_ALLOC and thus ld.so will 3044 not process them. */ 3045 if (unresolved_reloc 3046 && !((input_section->flags & SEC_DEBUGGING) != 0 3047 && h->def_dynamic)) 3048 (*_bfd_error_handler) 3049 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), 3050 input_bfd, 3051 input_section, 3052 (long) rel->r_offset, 3053 howto->name, 3054 h->root.root.string); 3055 3056 if (r_type == R_390_20 3057 || r_type == R_390_GOT20 3058 || r_type == R_390_GOTPLT20 3059 || r_type == R_390_TLS_GOTIE20) 3060 { 3061 relocation += rel->r_addend; 3062 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; 3063 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3064 contents, rel->r_offset, 3065 relocation, 0); 3066 } 3067 else 3068 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3069 contents, rel->r_offset, 3070 relocation, rel->r_addend); 3071 3072 if (r != bfd_reloc_ok) 3073 { 3074 const char *name; 3075 3076 if (h != NULL) 3077 name = h->root.root.string; 3078 else 3079 { 3080 name = bfd_elf_string_from_elf_section (input_bfd, 3081 symtab_hdr->sh_link, 3082 sym->st_name); 3083 if (name == NULL) 3084 return FALSE; 3085 if (*name == '\0') 3086 name = bfd_section_name (input_bfd, sec); 3087 } 3088 3089 if (r == bfd_reloc_overflow) 3090 { 3091 3092 if (! ((*info->callbacks->reloc_overflow) 3093 (info, (h ? &h->root : NULL), name, howto->name, 3094 (bfd_vma) 0, input_bfd, input_section, 3095 rel->r_offset))) 3096 return FALSE; 3097 } 3098 else 3099 { 3100 (*_bfd_error_handler) 3101 (_("%B(%A+0x%lx): reloc against `%s': error %d"), 3102 input_bfd, input_section, 3103 (long) rel->r_offset, name, (int) r); 3104 return FALSE; 3105 } 3106 } 3107 } 3108 3109 return TRUE; 3110} 3111 3112/* Finish up dynamic symbol handling. We set the contents of various 3113 dynamic sections here. */ 3114 3115static bfd_boolean 3116elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) 3117 bfd *output_bfd; 3118 struct bfd_link_info *info; 3119 struct elf_link_hash_entry *h; 3120 Elf_Internal_Sym *sym; 3121{ 3122 struct elf_s390_link_hash_table *htab; 3123 3124 htab = elf_s390_hash_table (info); 3125 3126 if (h->plt.offset != (bfd_vma) -1) 3127 { 3128 bfd_vma plt_index; 3129 bfd_vma got_offset; 3130 Elf_Internal_Rela rela; 3131 bfd_byte *loc; 3132 bfd_vma relative_offset; 3133 3134 /* This symbol has an entry in the procedure linkage table. Set 3135 it up. */ 3136 if (h->dynindx == -1 3137 || htab->splt == NULL 3138 || htab->sgotplt == NULL 3139 || htab->srelplt == NULL) 3140 abort (); 3141 3142 /* Calc. index no. 3143 Current offset - size first entry / entry size. */ 3144 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; 3145 3146 /* Offset in GOT is PLT index plus GOT headers(3) times 4, 3147 addr & GOT addr. */ 3148 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; 3149 3150 /* S390 uses halfwords for relative branch calc! */ 3151 relative_offset = - ((PLT_FIRST_ENTRY_SIZE + 3152 (PLT_ENTRY_SIZE * plt_index) + 18) / 2); 3153 /* If offset is > 32768, branch to a previous branch 3154 390 can only handle +-64 K jumps. */ 3155 if ( -32768 > (int) relative_offset ) 3156 relative_offset 3157 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2); 3158 3159 /* Fill in the entry in the procedure linkage table. */ 3160 if (!info->shared) 3161 { 3162 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0, 3163 htab->splt->contents + h->plt.offset); 3164 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1, 3165 htab->splt->contents + h->plt.offset + 4); 3166 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2, 3167 htab->splt->contents + h->plt.offset + 8); 3168 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3, 3169 htab->splt->contents + h->plt.offset + 12); 3170 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4, 3171 htab->splt->contents + h->plt.offset + 16); 3172 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3173 htab->splt->contents + h->plt.offset + 20); 3174 bfd_put_32 (output_bfd, 3175 (htab->sgotplt->output_section->vma 3176 + htab->sgotplt->output_offset 3177 + got_offset), 3178 htab->splt->contents + h->plt.offset + 24); 3179 } 3180 else if (got_offset < 4096) 3181 { 3182 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset, 3183 htab->splt->contents + h->plt.offset); 3184 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1, 3185 htab->splt->contents + h->plt.offset + 4); 3186 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2, 3187 htab->splt->contents + h->plt.offset + 8); 3188 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3, 3189 htab->splt->contents + h->plt.offset + 12); 3190 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4, 3191 htab->splt->contents + h->plt.offset + 16); 3192 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3193 htab->splt->contents + h->plt.offset + 20); 3194 bfd_put_32 (output_bfd, (bfd_vma) 0, 3195 htab->splt->contents + h->plt.offset + 24); 3196 } 3197 else if (got_offset < 32768) 3198 { 3199 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset, 3200 htab->splt->contents + h->plt.offset); 3201 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1, 3202 htab->splt->contents + h->plt.offset + 4); 3203 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2, 3204 htab->splt->contents + h->plt.offset + 8); 3205 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3, 3206 htab->splt->contents + h->plt.offset + 12); 3207 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4, 3208 htab->splt->contents + h->plt.offset + 16); 3209 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3210 htab->splt->contents + h->plt.offset + 20); 3211 bfd_put_32 (output_bfd, (bfd_vma) 0, 3212 htab->splt->contents + h->plt.offset + 24); 3213 } 3214 else 3215 { 3216 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0, 3217 htab->splt->contents + h->plt.offset); 3218 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1, 3219 htab->splt->contents + h->plt.offset + 4); 3220 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2, 3221 htab->splt->contents + h->plt.offset + 8); 3222 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3, 3223 htab->splt->contents + h->plt.offset + 12); 3224 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4, 3225 htab->splt->contents + h->plt.offset + 16); 3226 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3227 htab->splt->contents + h->plt.offset + 20); 3228 bfd_put_32 (output_bfd, got_offset, 3229 htab->splt->contents + h->plt.offset + 24); 3230 } 3231 /* Insert offset into reloc. table here. */ 3232 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), 3233 htab->splt->contents + h->plt.offset + 28); 3234 3235 /* Fill in the entry in the global offset table. 3236 Points to instruction after GOT offset. */ 3237 bfd_put_32 (output_bfd, 3238 (htab->splt->output_section->vma 3239 + htab->splt->output_offset 3240 + h->plt.offset 3241 + 12), 3242 htab->sgotplt->contents + got_offset); 3243 3244 /* Fill in the entry in the .rela.plt section. */ 3245 rela.r_offset = (htab->sgotplt->output_section->vma 3246 + htab->sgotplt->output_offset 3247 + got_offset); 3248 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT); 3249 rela.r_addend = 0; 3250 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela); 3251 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3252 3253 if (!h->def_regular) 3254 { 3255 /* Mark the symbol as undefined, rather than as defined in 3256 the .plt section. Leave the value alone. This is a clue 3257 for the dynamic linker, to make function pointer 3258 comparisons work between an application and shared 3259 library. */ 3260 sym->st_shndx = SHN_UNDEF; 3261 } 3262 } 3263 3264 if (h->got.offset != (bfd_vma) -1 3265 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD 3266 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE 3267 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) 3268 { 3269 Elf_Internal_Rela rela; 3270 bfd_byte *loc; 3271 3272 /* This symbol has an entry in the global offset table. Set it 3273 up. */ 3274 3275 if (htab->sgot == NULL || htab->srelgot == NULL) 3276 abort (); 3277 3278 rela.r_offset = (htab->sgot->output_section->vma 3279 + htab->sgot->output_offset 3280 + (h->got.offset &~ (bfd_vma) 1)); 3281 3282 /* If this is a static link, or it is a -Bsymbolic link and the 3283 symbol is defined locally or was forced to be local because 3284 of a version file, we just want to emit a RELATIVE reloc. 3285 The entry in the global offset table will already have been 3286 initialized in the relocate_section function. */ 3287 if (info->shared 3288 && (info->symbolic 3289 || h->dynindx == -1 3290 || h->forced_local) 3291 && h->def_regular) 3292 { 3293 BFD_ASSERT((h->got.offset & 1) != 0); 3294 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 3295 rela.r_addend = (h->root.u.def.value 3296 + h->root.u.def.section->output_section->vma 3297 + h->root.u.def.section->output_offset); 3298 } 3299 else 3300 { 3301 BFD_ASSERT((h->got.offset & 1) == 0); 3302 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset); 3303 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT); 3304 rela.r_addend = 0; 3305 } 3306 3307 loc = htab->srelgot->contents; 3308 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 3309 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3310 } 3311 3312 if (h->needs_copy) 3313 { 3314 Elf_Internal_Rela rela; 3315 bfd_byte *loc; 3316 3317 /* This symbols needs a copy reloc. Set it up. */ 3318 3319 if (h->dynindx == -1 3320 || (h->root.type != bfd_link_hash_defined 3321 && h->root.type != bfd_link_hash_defweak) 3322 || htab->srelbss == NULL) 3323 abort (); 3324 3325 rela.r_offset = (h->root.u.def.value 3326 + h->root.u.def.section->output_section->vma 3327 + h->root.u.def.section->output_offset); 3328 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY); 3329 rela.r_addend = 0; 3330 loc = htab->srelbss->contents; 3331 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela); 3332 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3333 } 3334 3335 /* Mark some specially defined symbols as absolute. */ 3336 if (strcmp (h->root.root.string, "_DYNAMIC") == 0 3337 || h == htab->elf.hgot 3338 || h == htab->elf.hplt) 3339 sym->st_shndx = SHN_ABS; 3340 3341 return TRUE; 3342} 3343 3344/* Used to decide how to sort relocs in an optimal manner for the 3345 dynamic linker, before writing them out. */ 3346 3347static enum elf_reloc_type_class 3348elf_s390_reloc_type_class (rela) 3349 const Elf_Internal_Rela *rela; 3350{ 3351 switch ((int) ELF32_R_TYPE (rela->r_info)) 3352 { 3353 case R_390_RELATIVE: 3354 return reloc_class_relative; 3355 case R_390_JMP_SLOT: 3356 return reloc_class_plt; 3357 case R_390_COPY: 3358 return reloc_class_copy; 3359 default: 3360 return reloc_class_normal; 3361 } 3362} 3363 3364/* Finish up the dynamic sections. */ 3365 3366static bfd_boolean 3367elf_s390_finish_dynamic_sections (output_bfd, info) 3368 bfd *output_bfd; 3369 struct bfd_link_info *info; 3370{ 3371 struct elf_s390_link_hash_table *htab; 3372 bfd *dynobj; 3373 asection *sdyn; 3374 3375 htab = elf_s390_hash_table (info); 3376 dynobj = htab->elf.dynobj; 3377 sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); 3378 3379 if (htab->elf.dynamic_sections_created) 3380 { 3381 Elf32_External_Dyn *dyncon, *dynconend; 3382 3383 if (sdyn == NULL || htab->sgot == NULL) 3384 abort (); 3385 3386 dyncon = (Elf32_External_Dyn *) sdyn->contents; 3387 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 3388 for (; dyncon < dynconend; dyncon++) 3389 { 3390 Elf_Internal_Dyn dyn; 3391 asection *s; 3392 3393 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 3394 3395 switch (dyn.d_tag) 3396 { 3397 default: 3398 continue; 3399 3400 case DT_PLTGOT: 3401 dyn.d_un.d_ptr = htab->sgot->output_section->vma; 3402 break; 3403 3404 case DT_JMPREL: 3405 dyn.d_un.d_ptr = htab->srelplt->output_section->vma; 3406 break; 3407 3408 case DT_PLTRELSZ: 3409 s = htab->srelplt->output_section; 3410 dyn.d_un.d_val = s->size; 3411 break; 3412 } 3413 3414 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3415 } 3416 3417 /* Fill in the special first entry in the procedure linkage table. */ 3418 if (htab->splt && htab->splt->size > 0) 3419 { 3420 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE); 3421 if (info->shared) 3422 { 3423 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0, 3424 htab->splt->contents ); 3425 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1, 3426 htab->splt->contents +4 ); 3427 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2, 3428 htab->splt->contents +8 ); 3429 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3, 3430 htab->splt->contents +12 ); 3431 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4, 3432 htab->splt->contents +16 ); 3433 } 3434 else 3435 { 3436 bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0, 3437 htab->splt->contents ); 3438 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1, 3439 htab->splt->contents +4 ); 3440 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2, 3441 htab->splt->contents +8 ); 3442 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3, 3443 htab->splt->contents +12 ); 3444 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4, 3445 htab->splt->contents +16 ); 3446 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5, 3447 htab->splt->contents +20 ); 3448 bfd_put_32 (output_bfd, 3449 htab->sgotplt->output_section->vma 3450 + htab->sgotplt->output_offset, 3451 htab->splt->contents + 24); 3452 } 3453 elf_section_data (htab->splt->output_section) 3454 ->this_hdr.sh_entsize = 4; 3455 } 3456 3457 } 3458 3459 if (htab->sgotplt) 3460 { 3461 /* Fill in the first three entries in the global offset table. */ 3462 if (htab->sgotplt->size > 0) 3463 { 3464 bfd_put_32 (output_bfd, 3465 (sdyn == NULL ? (bfd_vma) 0 3466 : sdyn->output_section->vma + sdyn->output_offset), 3467 htab->sgotplt->contents); 3468 /* One entry for shared object struct ptr. */ 3469 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4); 3470 /* One entry for _dl_runtime_resolve. */ 3471 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); 3472 } 3473 3474 elf_section_data (htab->sgotplt->output_section) 3475 ->this_hdr.sh_entsize = 4; 3476 } 3477 return TRUE; 3478} 3479 3480static bfd_boolean 3481elf_s390_grok_prstatus (abfd, note) 3482 bfd * abfd; 3483 Elf_Internal_Note * note; 3484{ 3485 int offset; 3486 unsigned int size; 3487 3488 switch (note->descsz) 3489 { 3490 default: 3491 return FALSE; 3492 3493 case 224: /* S/390 Linux. */ 3494 /* pr_cursig */ 3495 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); 3496 3497 /* pr_pid */ 3498 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); 3499 3500 /* pr_reg */ 3501 offset = 72; 3502 size = 144; 3503 break; 3504 } 3505 3506 /* Make a ".reg/999" section. */ 3507 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 3508 size, note->descpos + offset); 3509} 3510 3511/* Return address for Ith PLT stub in section PLT, for relocation REL 3512 or (bfd_vma) -1 if it should not be included. */ 3513 3514static bfd_vma 3515elf_s390_plt_sym_val (bfd_vma i, const asection *plt, 3516 const arelent *rel ATTRIBUTE_UNUSED) 3517{ 3518 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; 3519} 3520 3521 3522#define TARGET_BIG_SYM bfd_elf32_s390_vec 3523#define TARGET_BIG_NAME "elf32-s390" 3524#define ELF_ARCH bfd_arch_s390 3525#define ELF_MACHINE_CODE EM_S390 3526#define ELF_MACHINE_ALT1 EM_S390_OLD 3527#define ELF_MAXPAGESIZE 0x1000 3528 3529#define elf_backend_can_gc_sections 1 3530#define elf_backend_can_refcount 1 3531#define elf_backend_want_got_plt 1 3532#define elf_backend_plt_readonly 1 3533#define elf_backend_want_plt_sym 0 3534#define elf_backend_got_header_size 12 3535#define elf_backend_rela_normal 1 3536 3537#define elf_info_to_howto elf_s390_info_to_howto 3538 3539#define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name 3540#define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create 3541#define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_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