elf32-s390.c revision 1.6
1 /* IBM S/390-specific support for 32-bit ELF 2 Copyright (C) 2000-2016 Free Software Foundation, Inc. 3 Contributed by Carl B. Pedersen and Martin Schwidefsky. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 20 02110-1301, USA. */ 21 22 #include "sysdep.h" 23 #include "bfd.h" 24 #include "bfdlink.h" 25 #include "libbfd.h" 26 #include "elf-bfd.h" 27 #include "elf/s390.h" 28 29 static bfd_reloc_status_type 30 s390_tls_reloc (bfd *, arelent *, asymbol *, void *, 31 asection *, bfd *, char **); 32 static bfd_reloc_status_type 33 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *, 34 asection *, bfd *, char **); 35 36 /* The relocation "howto" table. */ 37 38 static reloc_howto_type elf_howto_table[] = 39 { 40 HOWTO (R_390_NONE, /* type */ 41 0, /* rightshift */ 42 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */ 43 0, /* bitsize */ 44 FALSE, /* pc_relative */ 45 0, /* bitpos */ 46 complain_overflow_dont, /* complain_on_overflow */ 47 bfd_elf_generic_reloc, /* special_function */ 48 "R_390_NONE", /* name */ 49 FALSE, /* partial_inplace */ 50 0, /* src_mask */ 51 0, /* dst_mask */ 52 FALSE), /* pcrel_offset */ 53 54 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 55 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), 56 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 57 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), 58 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 59 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), 60 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 61 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), 62 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 63 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), 64 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield, 65 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), 66 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 67 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), 68 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 69 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), 70 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 71 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE), 72 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 73 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE), 74 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 75 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE), 76 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 77 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE), 78 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 79 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE), 80 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 81 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE), 82 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 83 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), 84 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, 85 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), 86 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, 87 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), 88 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, 89 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), 90 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 91 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), 92 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 93 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), 94 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 95 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE), 96 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */ 97 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */ 98 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */ 99 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */ 100 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 101 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE), 102 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 103 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), 104 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */ 105 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 106 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), 107 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 108 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), 109 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 110 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), 111 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */ 112 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 113 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE), 114 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 115 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), 116 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 117 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), 118 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */ 119 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, 120 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), 121 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, 122 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), 123 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, 124 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), 125 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 126 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE), 127 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */ 128 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 129 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), 130 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 131 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE), 132 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */ 133 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 134 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE), 135 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */ 136 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 137 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE), 138 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */ 139 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 140 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE), 141 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 142 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE), 143 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */ 144 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 145 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE), 146 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */ 147 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 148 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE), 149 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 150 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE), 151 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 152 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE), 153 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 154 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE), 155 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 156 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE), 157 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 158 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE), 159 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 160 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE), 161 HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 162 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE), 163 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, 164 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE), 165 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, 166 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE), 167 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, 168 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE), 169 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, 170 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE), 171 }; 172 173 /* GNU extension to record C++ vtable hierarchy. */ 174 static reloc_howto_type elf32_s390_vtinherit_howto = 175 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); 176 static reloc_howto_type elf32_s390_vtentry_howto = 177 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); 178 179 static reloc_howto_type * 180 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 181 bfd_reloc_code_real_type code) 182 { 183 switch (code) 184 { 185 case BFD_RELOC_NONE: 186 return &elf_howto_table[(int) R_390_NONE]; 187 case BFD_RELOC_8: 188 return &elf_howto_table[(int) R_390_8]; 189 case BFD_RELOC_390_12: 190 return &elf_howto_table[(int) R_390_12]; 191 case BFD_RELOC_16: 192 return &elf_howto_table[(int) R_390_16]; 193 case BFD_RELOC_32: 194 return &elf_howto_table[(int) R_390_32]; 195 case BFD_RELOC_CTOR: 196 return &elf_howto_table[(int) R_390_32]; 197 case BFD_RELOC_32_PCREL: 198 return &elf_howto_table[(int) R_390_PC32]; 199 case BFD_RELOC_390_GOT12: 200 return &elf_howto_table[(int) R_390_GOT12]; 201 case BFD_RELOC_32_GOT_PCREL: 202 return &elf_howto_table[(int) R_390_GOT32]; 203 case BFD_RELOC_390_PLT32: 204 return &elf_howto_table[(int) R_390_PLT32]; 205 case BFD_RELOC_390_COPY: 206 return &elf_howto_table[(int) R_390_COPY]; 207 case BFD_RELOC_390_GLOB_DAT: 208 return &elf_howto_table[(int) R_390_GLOB_DAT]; 209 case BFD_RELOC_390_JMP_SLOT: 210 return &elf_howto_table[(int) R_390_JMP_SLOT]; 211 case BFD_RELOC_390_RELATIVE: 212 return &elf_howto_table[(int) R_390_RELATIVE]; 213 case BFD_RELOC_32_GOTOFF: 214 return &elf_howto_table[(int) R_390_GOTOFF32]; 215 case BFD_RELOC_390_GOTPC: 216 return &elf_howto_table[(int) R_390_GOTPC]; 217 case BFD_RELOC_390_GOT16: 218 return &elf_howto_table[(int) R_390_GOT16]; 219 case BFD_RELOC_16_PCREL: 220 return &elf_howto_table[(int) R_390_PC16]; 221 case BFD_RELOC_390_PC12DBL: 222 return &elf_howto_table[(int) R_390_PC12DBL]; 223 case BFD_RELOC_390_PLT12DBL: 224 return &elf_howto_table[(int) R_390_PLT12DBL]; 225 case BFD_RELOC_390_PC16DBL: 226 return &elf_howto_table[(int) R_390_PC16DBL]; 227 case BFD_RELOC_390_PLT16DBL: 228 return &elf_howto_table[(int) R_390_PLT16DBL]; 229 case BFD_RELOC_390_PC24DBL: 230 return &elf_howto_table[(int) R_390_PC24DBL]; 231 case BFD_RELOC_390_PLT24DBL: 232 return &elf_howto_table[(int) R_390_PLT24DBL]; 233 case BFD_RELOC_390_PC32DBL: 234 return &elf_howto_table[(int) R_390_PC32DBL]; 235 case BFD_RELOC_390_PLT32DBL: 236 return &elf_howto_table[(int) R_390_PLT32DBL]; 237 case BFD_RELOC_390_GOTPCDBL: 238 return &elf_howto_table[(int) R_390_GOTPCDBL]; 239 case BFD_RELOC_390_GOTENT: 240 return &elf_howto_table[(int) R_390_GOTENT]; 241 case BFD_RELOC_16_GOTOFF: 242 return &elf_howto_table[(int) R_390_GOTOFF16]; 243 case BFD_RELOC_390_GOTPLT12: 244 return &elf_howto_table[(int) R_390_GOTPLT12]; 245 case BFD_RELOC_390_GOTPLT16: 246 return &elf_howto_table[(int) R_390_GOTPLT16]; 247 case BFD_RELOC_390_GOTPLT32: 248 return &elf_howto_table[(int) R_390_GOTPLT32]; 249 case BFD_RELOC_390_GOTPLTENT: 250 return &elf_howto_table[(int) R_390_GOTPLTENT]; 251 case BFD_RELOC_390_PLTOFF16: 252 return &elf_howto_table[(int) R_390_PLTOFF16]; 253 case BFD_RELOC_390_PLTOFF32: 254 return &elf_howto_table[(int) R_390_PLTOFF32]; 255 case BFD_RELOC_390_TLS_LOAD: 256 return &elf_howto_table[(int) R_390_TLS_LOAD]; 257 case BFD_RELOC_390_TLS_GDCALL: 258 return &elf_howto_table[(int) R_390_TLS_GDCALL]; 259 case BFD_RELOC_390_TLS_LDCALL: 260 return &elf_howto_table[(int) R_390_TLS_LDCALL]; 261 case BFD_RELOC_390_TLS_GD32: 262 return &elf_howto_table[(int) R_390_TLS_GD32]; 263 case BFD_RELOC_390_TLS_GOTIE12: 264 return &elf_howto_table[(int) R_390_TLS_GOTIE12]; 265 case BFD_RELOC_390_TLS_GOTIE32: 266 return &elf_howto_table[(int) R_390_TLS_GOTIE32]; 267 case BFD_RELOC_390_TLS_LDM32: 268 return &elf_howto_table[(int) R_390_TLS_LDM32]; 269 case BFD_RELOC_390_TLS_IE32: 270 return &elf_howto_table[(int) R_390_TLS_IE32]; 271 case BFD_RELOC_390_TLS_IEENT: 272 return &elf_howto_table[(int) R_390_TLS_IEENT]; 273 case BFD_RELOC_390_TLS_LE32: 274 return &elf_howto_table[(int) R_390_TLS_LE32]; 275 case BFD_RELOC_390_TLS_LDO32: 276 return &elf_howto_table[(int) R_390_TLS_LDO32]; 277 case BFD_RELOC_390_TLS_DTPMOD: 278 return &elf_howto_table[(int) R_390_TLS_DTPMOD]; 279 case BFD_RELOC_390_TLS_DTPOFF: 280 return &elf_howto_table[(int) R_390_TLS_DTPOFF]; 281 case BFD_RELOC_390_TLS_TPOFF: 282 return &elf_howto_table[(int) R_390_TLS_TPOFF]; 283 case BFD_RELOC_390_20: 284 return &elf_howto_table[(int) R_390_20]; 285 case BFD_RELOC_390_GOT20: 286 return &elf_howto_table[(int) R_390_GOT20]; 287 case BFD_RELOC_390_GOTPLT20: 288 return &elf_howto_table[(int) R_390_GOTPLT20]; 289 case BFD_RELOC_390_TLS_GOTIE20: 290 return &elf_howto_table[(int) R_390_TLS_GOTIE20]; 291 case BFD_RELOC_390_IRELATIVE: 292 return &elf_howto_table[(int) R_390_IRELATIVE]; 293 case BFD_RELOC_VTABLE_INHERIT: 294 return &elf32_s390_vtinherit_howto; 295 case BFD_RELOC_VTABLE_ENTRY: 296 return &elf32_s390_vtentry_howto; 297 default: 298 break; 299 } 300 return 0; 301 } 302 303 static reloc_howto_type * 304 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 305 const char *r_name) 306 { 307 unsigned int i; 308 309 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) 310 if (elf_howto_table[i].name != NULL 311 && strcasecmp (elf_howto_table[i].name, r_name) == 0) 312 return &elf_howto_table[i]; 313 314 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0) 315 return &elf32_s390_vtinherit_howto; 316 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0) 317 return &elf32_s390_vtentry_howto; 318 319 return NULL; 320 } 321 322 /* We need to use ELF32_R_TYPE so we have our own copy of this function, 323 and elf32-s390.c has its own copy. */ 324 325 static void 326 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 327 arelent *cache_ptr, 328 Elf_Internal_Rela *dst) 329 { 330 unsigned int r_type = ELF32_R_TYPE(dst->r_info); 331 switch (r_type) 332 { 333 case R_390_GNU_VTINHERIT: 334 cache_ptr->howto = &elf32_s390_vtinherit_howto; 335 break; 336 337 case R_390_GNU_VTENTRY: 338 cache_ptr->howto = &elf32_s390_vtentry_howto; 339 break; 340 341 default: 342 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0])) 343 { 344 (*_bfd_error_handler) (_("%B: invalid relocation type %d"), 345 abfd, (int) r_type); 346 r_type = R_390_NONE; 347 } 348 cache_ptr->howto = &elf_howto_table[r_type]; 349 } 350 } 351 352 /* A relocation function which doesn't do anything. */ 353 static bfd_reloc_status_type 354 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED, 355 arelent *reloc_entry, 356 asymbol *symbol ATTRIBUTE_UNUSED, 357 void * data ATTRIBUTE_UNUSED, 358 asection *input_section, 359 bfd *output_bfd, 360 char **error_message ATTRIBUTE_UNUSED) 361 { 362 if (output_bfd) 363 reloc_entry->address += input_section->output_offset; 364 return bfd_reloc_ok; 365 } 366 367 /* Handle the large displacement relocs. */ 368 static bfd_reloc_status_type 369 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED, 370 arelent *reloc_entry, 371 asymbol *symbol, 372 void * data ATTRIBUTE_UNUSED, 373 asection *input_section, 374 bfd *output_bfd, 375 char **error_message ATTRIBUTE_UNUSED) 376 { 377 reloc_howto_type *howto = reloc_entry->howto; 378 bfd_vma relocation; 379 bfd_vma insn; 380 381 if (output_bfd != (bfd *) NULL 382 && (symbol->flags & BSF_SECTION_SYM) == 0 383 && (! howto->partial_inplace 384 || reloc_entry->addend == 0)) 385 { 386 reloc_entry->address += input_section->output_offset; 387 return bfd_reloc_ok; 388 } 389 390 if (output_bfd != NULL) 391 return bfd_reloc_continue; 392 393 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 394 return bfd_reloc_outofrange; 395 396 relocation = (symbol->value 397 + symbol->section->output_section->vma 398 + symbol->section->output_offset); 399 relocation += reloc_entry->addend; 400 if (howto->pc_relative) 401 { 402 relocation -= (input_section->output_section->vma 403 + input_section->output_offset); 404 relocation -= reloc_entry->address; 405 } 406 407 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); 408 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; 409 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); 410 411 if ((bfd_signed_vma) relocation < - 0x80000 412 || (bfd_signed_vma) relocation > 0x7ffff) 413 return bfd_reloc_overflow; 414 else 415 return bfd_reloc_ok; 416 } 417 418 static bfd_boolean 419 elf_s390_is_local_label_name (bfd *abfd, const char *name) 420 { 421 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) 422 return TRUE; 423 424 return _bfd_elf_is_local_label_name (abfd, name); 425 } 426 427 /* Functions for the 390 ELF linker. */ 428 429 /* The name of the dynamic interpreter. This is put in the .interp 430 section. */ 431 432 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" 433 434 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 435 copying dynamic variables from a shared lib into an app's dynbss 436 section, and instead use a dynamic relocation to point into the 437 shared lib. */ 438 #define ELIMINATE_COPY_RELOCS 1 439 440 /* The size in bytes of the first entry in the procedure linkage table. */ 441 #define PLT_FIRST_ENTRY_SIZE 32 442 /* The size in bytes of an entry in the procedure linkage table. */ 443 #define PLT_ENTRY_SIZE 32 444 445 #define GOT_ENTRY_SIZE 4 446 447 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela) 448 449 /* The first three entries in a procedure linkage table are reserved, 450 and the initial contents are unimportant (we zero them out). 451 Subsequent entries look like this. See the SVR4 ABI 386 452 supplement to see how this works. */ 453 454 /* For the s390, simple addr offset can only be 0 - 4096. 455 To use the full 2 GB address space, several instructions 456 are needed to load an address in a register and execute 457 a branch( or just saving the address) 458 459 Furthermore, only r 0 and 1 are free to use!!! */ 460 461 /* The first 3 words in the GOT are then reserved. 462 Word 0 is the address of the dynamic table. 463 Word 1 is a pointer to a structure describing the object 464 Word 2 is used to point to the loader entry address. 465 466 The code for position independent PLT entries looks like this: 467 468 r12 holds addr of the current GOT at entry to the PLT 469 470 The GOT holds the address in the PLT to be executed. 471 The loader then gets: 472 24(15) = Pointer to the structure describing the object. 473 28(15) = Offset into rela.plt 474 475 The loader must then find the module where the function is 476 and insert the address in the GOT. 477 478 Note: 390 can only address +- 64 K relative. 479 We check if offset > 65536, then make a relative branch -64xxx 480 back to a previous defined branch 481 482 PLT1: BASR 1,0 # 2 bytes 483 L 1,22(1) # 4 bytes Load offset in GOT in r 1 484 L 1,(1,12) # 4 bytes Load address from GOT in r1 485 BCR 15,1 # 2 bytes Jump to address 486 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 487 L 1,14(1) # 4 bytes Load offset in symol table in r1 488 BRC 15,-x # 4 bytes Jump to start of PLT 489 .word 0 # 2 bytes filler 490 .long ? # 4 bytes offset in GOT 491 .long ? # 4 bytes offset into rela.plt 492 493 This was the general case. There are two additional, optimizes PLT 494 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768. 495 First the one for GOT offsets < 4096: 496 497 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1 498 BCR 15,1 # 2 bytes Jump to address 499 .word 0,0,0 # 6 bytes filler 500 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 501 L 1,14(1) # 4 bytes Load offset in rela.plt in r1 502 BRC 15,-x # 4 bytes Jump to start of PLT 503 .word 0,0,0 # 6 bytes filler 504 .long ? # 4 bytes offset into rela.plt 505 506 Second the one for GOT offsets < 32768: 507 508 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1 509 L 1,(1,12) # 4 bytes Load address from GOT to r1 510 BCR 15,1 # 2 bytes Jump to address 511 .word 0 # 2 bytes filler 512 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 513 L 1,14(1) # 4 bytes Load offset in rela.plt in r1 514 BRC 15,-x # 4 bytes Jump to start of PLT 515 .word 0,0,0 # 6 bytes filler 516 .long ? # 4 bytes offset into rela.plt 517 518 Total = 32 bytes per PLT entry 519 520 The code for static build PLT entries looks like this: 521 522 PLT1: BASR 1,0 # 2 bytes 523 L 1,22(1) # 4 bytes Load address of GOT entry 524 L 1,0(0,1) # 4 bytes Load address from GOT in r1 525 BCR 15,1 # 2 bytes Jump to address 526 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 527 L 1,14(1) # 4 bytes Load offset in symbol table in r1 528 BRC 15,-x # 4 bytes Jump to start of PLT 529 .word 0 # 2 bytes filler 530 .long ? # 4 bytes address of GOT entry 531 .long ? # 4 bytes offset into rela.plt */ 532 533 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] = 534 { 535 0x0d, 0x10, /* basr %r1,%r0 */ 536 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */ 537 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */ 538 0x07, 0xf1, /* br %r1 */ 539 0x0d, 0x10, /* basr %r1,%r0 */ 540 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */ 541 0xa7, 0xf4, 0x00, 0x00, /* j first plt */ 542 0x00, 0x00, /* padding */ 543 0x00, 0x00, 0x00, 0x00, /* GOT offset */ 544 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */ 545 }; 546 547 /* Generic PLT pic entry. */ 548 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] = 549 { 550 0x0d, 0x10, /* basr %r1,%r0 */ 551 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */ 552 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */ 553 0x07, 0xf1, /* br %r1 */ 554 0x0d, 0x10, /* basr %r1,%r0 */ 555 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */ 556 0xa7, 0xf4, 0x00, 0x00, /* j first plt */ 557 0x00, 0x00, /* padding */ 558 0x00, 0x00, 0x00, 0x00, /* GOT offset */ 559 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */ 560 }; 561 562 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced 563 when generating the PLT slot with the GOT offset. */ 564 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] = 565 { 566 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */ 567 0x07, 0xf1, /* br %r1 */ 568 0x00, 0x00, 0x00, 0x00, /* padding */ 569 0x00, 0x00, 570 0x0d, 0x10, /* basr %r1,%r0 */ 571 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */ 572 0xa7, 0xf4, 0x00, 0x00, /* j first plt */ 573 0x00, 0x00, 0x00, 0x00, 574 0x00, 0x00, 0x00, 0x00 575 }; 576 577 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced 578 when generating the PLT slot with the GOT offset. */ 579 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] = 580 { 581 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */ 582 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */ 583 0x07, 0xf1, /* br %r1 */ 584 0x00, 0x00, 585 0x0d, 0x10, /* basr %r1,%r0 */ 586 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */ 587 0xa7, 0xf4, 0x00, 0x00, /* j first plt */ 588 0x00, 0x00, 0x00, 0x00, 589 0x00, 0x00, 0x00, 0x00, 590 0x00, 0x00 591 }; 592 593 /* The first PLT entry pushes the offset into the rela.plt 594 from R1 onto the stack at 8(15) and the loader object info 595 at 12(15), loads the loader address in R1 and jumps to it. */ 596 597 /* The first entry in the PLT for PIC code: 598 599 PLT0: 600 ST 1,28(15) # R1 has offset into rela.plt 601 L 1,4(12) # Get loader ino(object struct address) 602 ST 1,24(15) # Store address 603 L 1,8(12) # Entry address of loader in R1 604 BR 1 # Jump to loader 605 606 The first entry in the PLT for static code: 607 608 PLT0: 609 ST 1,28(15) # R1 has offset into rela.plt 610 BASR 1,0 611 L 1,18(0,1) # Get address of GOT 612 MVC 24(4,15),4(1) # Move loader ino to stack 613 L 1,8(1) # Get address of loader 614 BR 1 # Jump to loader 615 .word 0 # filler 616 .long got # address of GOT */ 617 618 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] = 619 { 620 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */ 621 0x0d, 0x10, /* basr %r1,%r0 */ 622 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */ 623 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */ 624 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */ 625 0x07, 0xf1, /* br %r1 */ 626 0x00, 0x00, 0x00, 0x00, 627 0x00, 0x00, 0x00, 0x00, 628 0x00, 0x00 629 }; 630 631 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] = 632 { 633 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */ 634 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */ 635 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */ 636 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */ 637 0x07, 0xf1, /* br %r1 */ 638 0x00, 0x00, 0x00, 0x00, 639 0x00, 0x00, 0x00, 0x00, 640 0x00, 0x00, 0x00, 0x00, 641 0x00, 0x00 642 }; 643 644 645 /* s390 ELF linker hash entry. */ 646 647 struct elf_s390_link_hash_entry 648 { 649 struct elf_link_hash_entry elf; 650 651 /* Track dynamic relocs copied for this symbol. */ 652 struct elf_dyn_relocs *dyn_relocs; 653 654 /* Number of GOTPLT references for a function. */ 655 bfd_signed_vma gotplt_refcount; 656 657 #define GOT_UNKNOWN 0 658 #define GOT_NORMAL 1 659 #define GOT_TLS_GD 2 660 #define GOT_TLS_IE 3 661 #define GOT_TLS_IE_NLT 4 662 unsigned char tls_type; 663 664 /* For pointer equality reasons we might need to change the symbol 665 type from STT_GNU_IFUNC to STT_FUNC together with its value and 666 section entry. So after alloc_dynrelocs only these values should 667 be used. In order to check whether a symbol is IFUNC use 668 s390_is_ifunc_symbol_p. */ 669 bfd_vma ifunc_resolver_address; 670 asection *ifunc_resolver_section; 671 }; 672 673 #define elf_s390_hash_entry(ent) \ 674 ((struct elf_s390_link_hash_entry *)(ent)) 675 676 /* This structure represents an entry in the local PLT list needed for 677 local IFUNC symbols. */ 678 struct plt_entry 679 { 680 /* The section of the local symbol. 681 Set in relocate_section and used in finish_dynamic_sections. */ 682 asection *sec; 683 684 union 685 { 686 bfd_signed_vma refcount; 687 bfd_vma offset; 688 } plt; 689 }; 690 691 /* NOTE: Keep this structure in sync with 692 the one declared in elf64-s390.c. */ 693 struct elf_s390_obj_tdata 694 { 695 struct elf_obj_tdata root; 696 697 /* A local PLT is needed for ifunc symbols. */ 698 struct plt_entry *local_plt; 699 700 /* TLS type for each local got entry. */ 701 char *local_got_tls_type; 702 }; 703 704 #define elf_s390_tdata(abfd) \ 705 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) 706 707 #define elf_s390_local_plt(abfd) \ 708 (elf_s390_tdata (abfd)->local_plt) 709 710 #define elf_s390_local_got_tls_type(abfd) \ 711 (elf_s390_tdata (abfd)->local_got_tls_type) 712 713 #define is_s390_elf(bfd) \ 714 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 715 && elf_tdata (bfd) != NULL \ 716 && elf_object_id (bfd) == S390_ELF_DATA) 717 718 static bfd_boolean 719 elf_s390_mkobject (bfd *abfd) 720 { 721 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata), 722 S390_ELF_DATA); 723 } 724 725 static bfd_boolean 726 elf_s390_object_p (bfd *abfd) 727 { 728 /* Set the right machine number for an s390 elf32 file. */ 729 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31); 730 } 731 732 /* s390 ELF linker hash table. */ 733 734 struct elf_s390_link_hash_table 735 { 736 struct elf_link_hash_table elf; 737 738 /* Short-cuts to get to dynamic linker sections. */ 739 asection *sdynbss; 740 asection *srelbss; 741 asection *irelifunc; 742 743 union 744 { 745 bfd_signed_vma refcount; 746 bfd_vma offset; 747 } tls_ldm_got; 748 749 /* Small local sym cache. */ 750 struct sym_cache sym_cache; 751 }; 752 753 /* Get the s390 ELF linker hash table from a link_info structure. */ 754 755 #define elf_s390_hash_table(p) \ 756 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 757 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL) 758 759 #undef ELF64 760 #include "elf-s390-common.c" 761 762 /* Create an entry in an s390 ELF linker hash table. */ 763 764 static struct bfd_hash_entry * 765 link_hash_newfunc (struct bfd_hash_entry *entry, 766 struct bfd_hash_table *table, 767 const char *string) 768 { 769 /* Allocate the structure if it has not already been allocated by a 770 subclass. */ 771 if (entry == NULL) 772 { 773 entry = bfd_hash_allocate (table, 774 sizeof (struct elf_s390_link_hash_entry)); 775 if (entry == NULL) 776 return entry; 777 } 778 779 /* Call the allocation method of the superclass. */ 780 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 781 if (entry != NULL) 782 { 783 struct elf_s390_link_hash_entry *eh; 784 785 eh = (struct elf_s390_link_hash_entry *) entry; 786 eh->dyn_relocs = NULL; 787 eh->gotplt_refcount = 0; 788 eh->tls_type = GOT_UNKNOWN; 789 eh->ifunc_resolver_address = 0; 790 eh->ifunc_resolver_section = NULL; 791 } 792 793 return entry; 794 } 795 796 /* Create an s390 ELF linker hash table. */ 797 798 static struct bfd_link_hash_table * 799 elf_s390_link_hash_table_create (bfd *abfd) 800 { 801 struct elf_s390_link_hash_table *ret; 802 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); 803 804 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt); 805 if (ret == NULL) 806 return NULL; 807 808 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, 809 sizeof (struct elf_s390_link_hash_entry), 810 S390_ELF_DATA)) 811 { 812 free (ret); 813 return NULL; 814 } 815 816 return &ret->elf.root; 817 } 818 819 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up 820 shortcuts to them in our hash table. */ 821 822 static bfd_boolean 823 create_got_section (bfd *dynobj, struct bfd_link_info *info) 824 { 825 struct elf_s390_link_hash_table *htab; 826 827 if (! _bfd_elf_create_got_section (dynobj, info)) 828 return FALSE; 829 830 htab = elf_s390_hash_table (info); 831 htab->elf.sgot = bfd_get_linker_section (dynobj, ".got"); 832 htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); 833 htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 834 if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot) 835 abort (); 836 837 return TRUE; 838 } 839 840 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and 841 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our 842 hash table. */ 843 844 static bfd_boolean 845 elf_s390_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) 846 { 847 struct elf_s390_link_hash_table *htab; 848 849 htab = elf_s390_hash_table (info); 850 if (!htab->elf.sgot && !create_got_section (dynobj, info)) 851 return FALSE; 852 853 if (!_bfd_elf_create_dynamic_sections (dynobj, info)) 854 return FALSE; 855 856 htab->elf.splt = bfd_get_linker_section (dynobj, ".plt"); 857 htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt"); 858 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); 859 if (!bfd_link_pic (info)) 860 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); 861 862 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss 863 || (!bfd_link_pic (info) && !htab->srelbss)) 864 abort (); 865 866 return TRUE; 867 } 868 869 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 870 871 static void 872 elf_s390_copy_indirect_symbol (struct bfd_link_info *info, 873 struct elf_link_hash_entry *dir, 874 struct elf_link_hash_entry *ind) 875 { 876 struct elf_s390_link_hash_entry *edir, *eind; 877 878 edir = (struct elf_s390_link_hash_entry *) dir; 879 eind = (struct elf_s390_link_hash_entry *) ind; 880 881 if (eind->dyn_relocs != NULL) 882 { 883 if (edir->dyn_relocs != NULL) 884 { 885 struct elf_dyn_relocs **pp; 886 struct elf_dyn_relocs *p; 887 888 /* Add reloc counts against the indirect sym to the direct sym 889 list. Merge any entries against the same section. */ 890 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 891 { 892 struct elf_dyn_relocs *q; 893 894 for (q = edir->dyn_relocs; q != NULL; q = q->next) 895 if (q->sec == p->sec) 896 { 897 q->pc_count += p->pc_count; 898 q->count += p->count; 899 *pp = p->next; 900 break; 901 } 902 if (q == NULL) 903 pp = &p->next; 904 } 905 *pp = edir->dyn_relocs; 906 } 907 908 edir->dyn_relocs = eind->dyn_relocs; 909 eind->dyn_relocs = NULL; 910 } 911 912 if (ind->root.type == bfd_link_hash_indirect 913 && dir->got.refcount <= 0) 914 { 915 edir->tls_type = eind->tls_type; 916 eind->tls_type = GOT_UNKNOWN; 917 } 918 919 if (ELIMINATE_COPY_RELOCS 920 && ind->root.type != bfd_link_hash_indirect 921 && dir->dynamic_adjusted) 922 { 923 /* If called to transfer flags for a weakdef during processing 924 of elf_adjust_dynamic_symbol, don't copy non_got_ref. 925 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 926 dir->ref_dynamic |= ind->ref_dynamic; 927 dir->ref_regular |= ind->ref_regular; 928 dir->ref_regular_nonweak |= ind->ref_regular_nonweak; 929 dir->needs_plt |= ind->needs_plt; 930 } 931 else 932 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 933 } 934 935 static int 936 elf_s390_tls_transition (struct bfd_link_info *info, 937 int r_type, 938 int is_local) 939 { 940 if (bfd_link_pic (info)) 941 return r_type; 942 943 switch (r_type) 944 { 945 case R_390_TLS_GD32: 946 case R_390_TLS_IE32: 947 if (is_local) 948 return R_390_TLS_LE32; 949 return R_390_TLS_IE32; 950 case R_390_TLS_GOTIE32: 951 if (is_local) 952 return R_390_TLS_LE32; 953 return R_390_TLS_GOTIE32; 954 case R_390_TLS_LDM32: 955 return R_390_TLS_LE32; 956 } 957 958 return r_type; 959 } 960 961 /* Look through the relocs for a section during the first phase, and 962 allocate space in the global offset table or procedure linkage 963 table. */ 964 965 static bfd_boolean 966 elf_s390_check_relocs (bfd *abfd, 967 struct bfd_link_info *info, 968 asection *sec, 969 const Elf_Internal_Rela *relocs) 970 { 971 struct elf_s390_link_hash_table *htab; 972 Elf_Internal_Shdr *symtab_hdr; 973 struct elf_link_hash_entry **sym_hashes; 974 const Elf_Internal_Rela *rel; 975 const Elf_Internal_Rela *rel_end; 976 asection *sreloc; 977 bfd_signed_vma *local_got_refcounts; 978 int tls_type, old_tls_type; 979 Elf_Internal_Sym *isym; 980 981 if (bfd_link_relocatable (info)) 982 return TRUE; 983 984 BFD_ASSERT (is_s390_elf (abfd)); 985 986 htab = elf_s390_hash_table (info); 987 symtab_hdr = &elf_symtab_hdr (abfd); 988 sym_hashes = elf_sym_hashes (abfd); 989 local_got_refcounts = elf_local_got_refcounts (abfd); 990 991 sreloc = NULL; 992 993 rel_end = relocs + sec->reloc_count; 994 for (rel = relocs; rel < rel_end; rel++) 995 { 996 unsigned int r_type; 997 unsigned long r_symndx; 998 struct elf_link_hash_entry *h; 999 1000 r_symndx = ELF32_R_SYM (rel->r_info); 1001 1002 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) 1003 { 1004 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), 1005 abfd, r_symndx); 1006 return FALSE; 1007 } 1008 1009 if (r_symndx < symtab_hdr->sh_info) 1010 { 1011 /* A local symbol. */ 1012 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 1013 abfd, r_symndx); 1014 if (isym == NULL) 1015 return FALSE; 1016 1017 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 1018 { 1019 struct plt_entry *plt; 1020 1021 if (htab->elf.dynobj == NULL) 1022 htab->elf.dynobj = abfd; 1023 1024 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) 1025 return FALSE; 1026 1027 if (local_got_refcounts == NULL) 1028 { 1029 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr)) 1030 return FALSE; 1031 local_got_refcounts = elf_local_got_refcounts (abfd); 1032 } 1033 plt = elf_s390_local_plt (abfd); 1034 plt[r_symndx].plt.refcount++; 1035 } 1036 h = NULL; 1037 } 1038 else 1039 { 1040 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1041 while (h->root.type == bfd_link_hash_indirect 1042 || h->root.type == bfd_link_hash_warning) 1043 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1044 1045 /* PR15323, ref flags aren't set for references in the same 1046 object. */ 1047 h->root.non_ir_ref = 1; 1048 } 1049 1050 /* Create got section and local_got_refcounts array if they 1051 are needed. */ 1052 r_type = elf_s390_tls_transition (info, 1053 ELF32_R_TYPE (rel->r_info), 1054 h == NULL); 1055 switch (r_type) 1056 { 1057 case R_390_GOT12: 1058 case R_390_GOT16: 1059 case R_390_GOT20: 1060 case R_390_GOT32: 1061 case R_390_GOTENT: 1062 case R_390_GOTPLT12: 1063 case R_390_GOTPLT16: 1064 case R_390_GOTPLT20: 1065 case R_390_GOTPLT32: 1066 case R_390_GOTPLTENT: 1067 case R_390_TLS_GD32: 1068 case R_390_TLS_GOTIE12: 1069 case R_390_TLS_GOTIE20: 1070 case R_390_TLS_GOTIE32: 1071 case R_390_TLS_IEENT: 1072 case R_390_TLS_IE32: 1073 case R_390_TLS_LDM32: 1074 if (h == NULL 1075 && local_got_refcounts == NULL) 1076 { 1077 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr)) 1078 return FALSE; 1079 local_got_refcounts = elf_local_got_refcounts (abfd); 1080 } 1081 /* Fall through. */ 1082 case R_390_GOTOFF16: 1083 case R_390_GOTOFF32: 1084 case R_390_GOTPC: 1085 case R_390_GOTPCDBL: 1086 if (htab->elf.sgot == NULL) 1087 { 1088 if (htab->elf.dynobj == NULL) 1089 htab->elf.dynobj = abfd; 1090 if (!create_got_section (htab->elf.dynobj, info)) 1091 return FALSE; 1092 } 1093 } 1094 1095 if (h != NULL) 1096 { 1097 if (htab->elf.dynobj == NULL) 1098 htab->elf.dynobj = abfd; 1099 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) 1100 return FALSE; 1101 1102 /* Make sure an IFUNC symbol defined in a non-shared object 1103 always gets a PLT slot. */ 1104 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 1105 { 1106 /* The symbol is called by the dynamic loader in order 1107 to resolve the relocation. So it is in fact also 1108 referenced. */ 1109 h->ref_regular = 1; 1110 h->needs_plt = 1; 1111 } 1112 } 1113 switch (r_type) 1114 { 1115 case R_390_GOTPC: 1116 case R_390_GOTPCDBL: 1117 /* These relocs do not need a GOT slot. They just load the 1118 GOT pointer itself or address something else relative to 1119 the GOT. Since the GOT pointer has been set up above we 1120 are done. */ 1121 break; 1122 case R_390_GOTOFF16: 1123 case R_390_GOTOFF32: 1124 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular) 1125 break; 1126 1127 case R_390_PLT12DBL: 1128 case R_390_PLT16DBL: 1129 case R_390_PLT24DBL: 1130 case R_390_PLT32DBL: 1131 case R_390_PLT32: 1132 case R_390_PLTOFF16: 1133 case R_390_PLTOFF32: 1134 /* This symbol requires a procedure linkage table entry. We 1135 actually build the entry in adjust_dynamic_symbol, 1136 because this might be a case of linking PIC code which is 1137 never referenced by a dynamic object, in which case we 1138 don't need to generate a procedure linkage table entry 1139 after all. */ 1140 1141 /* If this is a local symbol, we resolve it directly without 1142 creating a procedure linkage table entry. */ 1143 if (h != NULL) 1144 { 1145 h->needs_plt = 1; 1146 h->plt.refcount += 1; 1147 } 1148 break; 1149 1150 case R_390_GOTPLT12: 1151 case R_390_GOTPLT16: 1152 case R_390_GOTPLT20: 1153 case R_390_GOTPLT32: 1154 case R_390_GOTPLTENT: 1155 /* This symbol requires either a procedure linkage table entry 1156 or an entry in the local got. We actually build the entry 1157 in adjust_dynamic_symbol because whether this is really a 1158 global reference can change and with it the fact if we have 1159 to create a plt entry or a local got entry. To be able to 1160 make a once global symbol a local one we have to keep track 1161 of the number of gotplt references that exist for this 1162 symbol. */ 1163 if (h != NULL) 1164 { 1165 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; 1166 h->needs_plt = 1; 1167 h->plt.refcount += 1; 1168 } 1169 else 1170 local_got_refcounts[r_symndx] += 1; 1171 break; 1172 1173 case R_390_TLS_LDM32: 1174 htab->tls_ldm_got.refcount += 1; 1175 break; 1176 1177 case R_390_TLS_IE32: 1178 case R_390_TLS_GOTIE12: 1179 case R_390_TLS_GOTIE20: 1180 case R_390_TLS_GOTIE32: 1181 case R_390_TLS_IEENT: 1182 if (bfd_link_pic (info)) 1183 info->flags |= DF_STATIC_TLS; 1184 /* Fall through. */ 1185 1186 case R_390_GOT12: 1187 case R_390_GOT16: 1188 case R_390_GOT20: 1189 case R_390_GOT32: 1190 case R_390_GOTENT: 1191 case R_390_TLS_GD32: 1192 /* This symbol requires a global offset table entry. */ 1193 switch (r_type) 1194 { 1195 default: 1196 case R_390_GOT12: 1197 case R_390_GOT16: 1198 case R_390_GOT20: 1199 case R_390_GOT32: 1200 case R_390_GOTENT: 1201 tls_type = GOT_NORMAL; 1202 break; 1203 case R_390_TLS_GD32: 1204 tls_type = GOT_TLS_GD; 1205 break; 1206 case R_390_TLS_IE32: 1207 case R_390_TLS_GOTIE32: 1208 tls_type = GOT_TLS_IE; 1209 break; 1210 case R_390_TLS_GOTIE12: 1211 case R_390_TLS_GOTIE20: 1212 case R_390_TLS_IEENT: 1213 tls_type = GOT_TLS_IE_NLT; 1214 break; 1215 } 1216 1217 if (h != NULL) 1218 { 1219 h->got.refcount += 1; 1220 old_tls_type = elf_s390_hash_entry(h)->tls_type; 1221 } 1222 else 1223 { 1224 local_got_refcounts[r_symndx] += 1; 1225 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; 1226 } 1227 /* If a TLS symbol is accessed using IE at least once, 1228 there is no point to use dynamic model for it. */ 1229 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) 1230 { 1231 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) 1232 { 1233 (*_bfd_error_handler) 1234 (_("%B: `%s' accessed both as normal and thread local symbol"), 1235 abfd, h->root.root.string); 1236 return FALSE; 1237 } 1238 if (old_tls_type > tls_type) 1239 tls_type = old_tls_type; 1240 } 1241 1242 if (old_tls_type != tls_type) 1243 { 1244 if (h != NULL) 1245 elf_s390_hash_entry (h)->tls_type = tls_type; 1246 else 1247 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; 1248 } 1249 1250 if (r_type != R_390_TLS_IE32) 1251 break; 1252 /* Fall through. */ 1253 1254 case R_390_TLS_LE32: 1255 /* For static linking and executables this reloc will be 1256 calculated at linktime otherwise a TLS_TPOFF runtime 1257 reloc will be generated. */ 1258 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info)) 1259 break; 1260 1261 if (!bfd_link_pic (info)) 1262 break; 1263 info->flags |= DF_STATIC_TLS; 1264 /* Fall through. */ 1265 1266 case R_390_8: 1267 case R_390_16: 1268 case R_390_32: 1269 case R_390_PC16: 1270 case R_390_PC12DBL: 1271 case R_390_PC16DBL: 1272 case R_390_PC24DBL: 1273 case R_390_PC32DBL: 1274 case R_390_PC32: 1275 if (h != NULL && bfd_link_executable (info)) 1276 { 1277 /* If this reloc is in a read-only section, we might 1278 need a copy reloc. We can't check reliably at this 1279 stage whether the section is read-only, as input 1280 sections have not yet been mapped to output sections. 1281 Tentatively set the flag for now, and correct in 1282 adjust_dynamic_symbol. */ 1283 h->non_got_ref = 1; 1284 1285 if (!bfd_link_pic (info)) 1286 { 1287 /* We may need a .plt entry if the function this reloc 1288 refers to is in a shared lib. */ 1289 h->plt.refcount += 1; 1290 } 1291 } 1292 1293 /* If we are creating a shared library, and this is a reloc 1294 against a global symbol, or a non PC relative reloc 1295 against a local symbol, then we need to copy the reloc 1296 into the shared library. However, if we are linking with 1297 -Bsymbolic, we do not need to copy a reloc against a 1298 global symbol which is defined in an object we are 1299 including in the link (i.e., DEF_REGULAR is set). At 1300 this point we have not seen all the input files, so it is 1301 possible that DEF_REGULAR is not set now but will be set 1302 later (it is never cleared). In case of a weak definition, 1303 DEF_REGULAR may be cleared later by a strong definition in 1304 a shared library. We account for that possibility below by 1305 storing information in the relocs_copied field of the hash 1306 table entry. A similar situation occurs when creating 1307 shared libraries and symbol visibility changes render the 1308 symbol local. 1309 1310 If on the other hand, we are creating an executable, we 1311 may need to keep relocations for symbols satisfied by a 1312 dynamic library if we manage to avoid copy relocs for the 1313 symbol. */ 1314 if ((bfd_link_pic (info) 1315 && (sec->flags & SEC_ALLOC) != 0 1316 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16 1317 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL 1318 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL 1319 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL 1320 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL 1321 && ELF32_R_TYPE (rel->r_info) != R_390_PC32) 1322 || (h != NULL 1323 && (! SYMBOLIC_BIND (info, h) 1324 || h->root.type == bfd_link_hash_defweak 1325 || !h->def_regular)))) 1326 || (ELIMINATE_COPY_RELOCS 1327 && !bfd_link_pic (info) 1328 && (sec->flags & SEC_ALLOC) != 0 1329 && h != NULL 1330 && (h->root.type == bfd_link_hash_defweak 1331 || !h->def_regular))) 1332 { 1333 struct elf_dyn_relocs *p; 1334 struct elf_dyn_relocs **head; 1335 1336 /* We must copy these reloc types into the output file. 1337 Create a reloc section in dynobj and make room for 1338 this reloc. */ 1339 if (sreloc == NULL) 1340 { 1341 if (htab->elf.dynobj == NULL) 1342 htab->elf.dynobj = abfd; 1343 1344 sreloc = _bfd_elf_make_dynamic_reloc_section 1345 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE); 1346 1347 if (sreloc == NULL) 1348 return FALSE; 1349 } 1350 1351 /* If this is a global symbol, we count the number of 1352 relocations we need for this symbol. */ 1353 if (h != NULL) 1354 { 1355 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; 1356 } 1357 else 1358 { 1359 /* Track dynamic relocs needed for local syms too. 1360 We really need local syms available to do this 1361 easily. Oh well. */ 1362 asection *s; 1363 void *vpp; 1364 1365 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 1366 abfd, r_symndx); 1367 if (isym == NULL) 1368 return FALSE; 1369 1370 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 1371 if (s == NULL) 1372 s = sec; 1373 1374 vpp = &elf_section_data (s)->local_dynrel; 1375 head = (struct elf_dyn_relocs **) vpp; 1376 } 1377 1378 p = *head; 1379 if (p == NULL || p->sec != sec) 1380 { 1381 bfd_size_type amt = sizeof *p; 1382 1383 p = ((struct elf_dyn_relocs *) 1384 bfd_alloc (htab->elf.dynobj, amt)); 1385 if (p == NULL) 1386 return FALSE; 1387 p->next = *head; 1388 *head = p; 1389 p->sec = sec; 1390 p->count = 0; 1391 p->pc_count = 0; 1392 } 1393 1394 p->count += 1; 1395 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16 1396 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL 1397 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL 1398 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL 1399 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL 1400 || ELF32_R_TYPE (rel->r_info) == R_390_PC32) 1401 p->pc_count += 1; 1402 } 1403 break; 1404 1405 /* This relocation describes the C++ object vtable hierarchy. 1406 Reconstruct it for later use during GC. */ 1407 case R_390_GNU_VTINHERIT: 1408 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1409 return FALSE; 1410 break; 1411 1412 /* This relocation describes which C++ vtable entries are actually 1413 used. Record for later use during GC. */ 1414 case R_390_GNU_VTENTRY: 1415 BFD_ASSERT (h != NULL); 1416 if (h != NULL 1417 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1418 return FALSE; 1419 break; 1420 1421 default: 1422 break; 1423 } 1424 } 1425 1426 return TRUE; 1427 } 1428 1429 /* Return the section that should be marked against GC for a given 1430 relocation. */ 1431 1432 static asection * 1433 elf_s390_gc_mark_hook (asection *sec, 1434 struct bfd_link_info *info, 1435 Elf_Internal_Rela *rel, 1436 struct elf_link_hash_entry *h, 1437 Elf_Internal_Sym *sym) 1438 { 1439 if (h != NULL) 1440 switch (ELF32_R_TYPE (rel->r_info)) 1441 { 1442 case R_390_GNU_VTINHERIT: 1443 case R_390_GNU_VTENTRY: 1444 return NULL; 1445 } 1446 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1447 1448 } 1449 1450 /* Update the got entry reference counts for the section being removed. */ 1451 1452 static bfd_boolean 1453 elf_s390_gc_sweep_hook (bfd *abfd, 1454 struct bfd_link_info *info, 1455 asection *sec, 1456 const Elf_Internal_Rela *relocs) 1457 { 1458 struct elf_s390_link_hash_table *htab; 1459 Elf_Internal_Shdr *symtab_hdr; 1460 struct elf_link_hash_entry **sym_hashes; 1461 bfd_signed_vma *local_got_refcounts; 1462 const Elf_Internal_Rela *rel, *relend; 1463 1464 if (bfd_link_relocatable (info)) 1465 return TRUE; 1466 1467 htab = elf_s390_hash_table (info); 1468 if (htab == NULL) 1469 return FALSE; 1470 1471 elf_section_data (sec)->local_dynrel = NULL; 1472 1473 symtab_hdr = &elf_symtab_hdr (abfd); 1474 sym_hashes = elf_sym_hashes (abfd); 1475 local_got_refcounts = elf_local_got_refcounts (abfd); 1476 1477 relend = relocs + sec->reloc_count; 1478 for (rel = relocs; rel < relend; rel++) 1479 { 1480 unsigned long r_symndx; 1481 unsigned int r_type; 1482 struct elf_link_hash_entry *h = NULL; 1483 1484 r_symndx = ELF32_R_SYM (rel->r_info); 1485 if (r_symndx >= symtab_hdr->sh_info) 1486 { 1487 struct elf_s390_link_hash_entry *eh; 1488 struct elf_dyn_relocs **pp; 1489 struct elf_dyn_relocs *p; 1490 1491 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1492 while (h->root.type == bfd_link_hash_indirect 1493 || h->root.type == bfd_link_hash_warning) 1494 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1495 eh = (struct elf_s390_link_hash_entry *) h; 1496 1497 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 1498 if (p->sec == sec) 1499 { 1500 /* Everything must go for SEC. */ 1501 *pp = p->next; 1502 break; 1503 } 1504 } 1505 else 1506 { 1507 Elf_Internal_Sym *isym; 1508 1509 /* A local symbol. */ 1510 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 1511 abfd, r_symndx); 1512 if (isym == NULL) 1513 return FALSE; 1514 1515 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 1516 { 1517 struct plt_entry *plt = elf_s390_local_plt (abfd); 1518 if (plt[r_symndx].plt.refcount > 0) 1519 plt[r_symndx].plt.refcount--; 1520 } 1521 } 1522 1523 r_type = ELF32_R_TYPE (rel->r_info); 1524 r_type = elf_s390_tls_transition (info, r_type, h != NULL); 1525 switch (r_type) 1526 { 1527 case R_390_TLS_LDM32: 1528 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) 1529 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; 1530 break; 1531 1532 case R_390_GOTOFF16: 1533 case R_390_GOTOFF32: 1534 if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular) 1535 { 1536 h->plt.refcount--; 1537 break; 1538 } 1539 1540 case R_390_GOTPC: 1541 case R_390_GOTPCDBL: 1542 break; 1543 1544 case R_390_TLS_GD32: 1545 case R_390_TLS_IE32: 1546 case R_390_TLS_GOTIE12: 1547 case R_390_TLS_GOTIE20: 1548 case R_390_TLS_GOTIE32: 1549 case R_390_TLS_IEENT: 1550 case R_390_GOT12: 1551 case R_390_GOT16: 1552 case R_390_GOT20: 1553 case R_390_GOT32: 1554 case R_390_GOTENT: 1555 if (h != NULL) 1556 { 1557 if (h->got.refcount > 0) 1558 h->got.refcount -= 1; 1559 } 1560 else if (local_got_refcounts != NULL) 1561 { 1562 if (local_got_refcounts[r_symndx] > 0) 1563 local_got_refcounts[r_symndx] -= 1; 1564 } 1565 break; 1566 1567 case R_390_8: 1568 case R_390_12: 1569 case R_390_16: 1570 case R_390_20: 1571 case R_390_32: 1572 case R_390_PC16: 1573 case R_390_PC12DBL: 1574 case R_390_PC16DBL: 1575 case R_390_PC24DBL: 1576 case R_390_PC32DBL: 1577 case R_390_PC32: 1578 if (bfd_link_pic (info)) 1579 break; 1580 /* Fall through. */ 1581 1582 case R_390_PLT12DBL: 1583 case R_390_PLT16DBL: 1584 case R_390_PLT24DBL: 1585 case R_390_PLT32DBL: 1586 case R_390_PLT32: 1587 case R_390_PLTOFF16: 1588 case R_390_PLTOFF32: 1589 if (h != NULL) 1590 { 1591 if (h->plt.refcount > 0) 1592 h->plt.refcount -= 1; 1593 } 1594 break; 1595 1596 case R_390_GOTPLT12: 1597 case R_390_GOTPLT16: 1598 case R_390_GOTPLT20: 1599 case R_390_GOTPLT32: 1600 case R_390_GOTPLTENT: 1601 if (h != NULL) 1602 { 1603 if (h->plt.refcount > 0) 1604 { 1605 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; 1606 h->plt.refcount -= 1; 1607 } 1608 } 1609 else if (local_got_refcounts != NULL) 1610 { 1611 if (local_got_refcounts[r_symndx] > 0) 1612 local_got_refcounts[r_symndx] -= 1; 1613 } 1614 break; 1615 1616 default: 1617 break; 1618 } 1619 } 1620 1621 return TRUE; 1622 } 1623 1624 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT 1625 entry but we found we will not create any. Called when we find we will 1626 not have any PLT for this symbol, by for example 1627 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, 1628 or elf_s390_size_dynamic_sections if no dynamic sections will be 1629 created (we're only linking static objects). */ 1630 1631 static void 1632 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h) 1633 { 1634 if (h->elf.root.type == bfd_link_hash_warning) 1635 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; 1636 1637 if (h->gotplt_refcount <= 0) 1638 return; 1639 1640 /* We simply add the number of gotplt references to the number 1641 * of got references for this symbol. */ 1642 h->elf.got.refcount += h->gotplt_refcount; 1643 h->gotplt_refcount = -1; 1644 } 1645 1646 /* Adjust a symbol defined by a dynamic object and referenced by a 1647 regular object. The current definition is in some section of the 1648 dynamic object, but we're not including those sections. We have to 1649 change the definition to something the rest of the link can 1650 understand. */ 1651 1652 static bfd_boolean 1653 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info, 1654 struct elf_link_hash_entry *h) 1655 { 1656 struct elf_s390_link_hash_table *htab; 1657 asection *s; 1658 1659 /* STT_GNU_IFUNC symbol must go through PLT. */ 1660 if (s390_is_ifunc_symbol_p (h)) 1661 { 1662 /* All local STT_GNU_IFUNC references must be treated as local 1663 calls via local PLT. */ 1664 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h)) 1665 { 1666 bfd_size_type pc_count = 0, count = 0; 1667 struct elf_dyn_relocs **pp; 1668 struct elf_s390_link_hash_entry *eh; 1669 struct elf_dyn_relocs *p; 1670 1671 eh = (struct elf_s390_link_hash_entry *) h; 1672 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 1673 { 1674 pc_count += p->pc_count; 1675 p->count -= p->pc_count; 1676 p->pc_count = 0; 1677 count += p->count; 1678 if (p->count == 0) 1679 *pp = p->next; 1680 else 1681 pp = &p->next; 1682 } 1683 1684 if (pc_count || count) 1685 { 1686 h->needs_plt = 1; 1687 h->non_got_ref = 1; 1688 if (h->plt.refcount <= 0) 1689 h->plt.refcount = 1; 1690 else 1691 h->plt.refcount += 1; 1692 } 1693 } 1694 1695 if (h->plt.refcount <= 0) 1696 { 1697 h->plt.offset = (bfd_vma) -1; 1698 h->needs_plt = 0; 1699 } 1700 return TRUE; 1701 } 1702 1703 /* If this is a function, put it in the procedure linkage table. We 1704 will fill in the contents of the procedure linkage table later 1705 (although we could actually do it here). */ 1706 if (h->type == STT_FUNC 1707 || h->needs_plt) 1708 { 1709 if (h->plt.refcount <= 0 1710 || SYMBOL_CALLS_LOCAL (info, h) 1711 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 1712 && h->root.type != bfd_link_hash_undefweak)) 1713 { 1714 /* This case can occur if we saw a PLT32 reloc in an input 1715 file, but the symbol was never referred to by a dynamic 1716 object, or if all references were garbage collected. In 1717 such a case, we don't actually need to build a procedure 1718 linkage table, and we can just do a PC32 reloc instead. */ 1719 h->plt.offset = (bfd_vma) -1; 1720 h->needs_plt = 0; 1721 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1722 } 1723 1724 return TRUE; 1725 } 1726 else 1727 /* It's possible that we incorrectly decided a .plt reloc was 1728 needed for an R_390_PC32 reloc to a non-function sym in 1729 check_relocs. We can't decide accurately between function and 1730 non-function syms in check-relocs; Objects loaded later in 1731 the link may change h->type. So fix it now. */ 1732 h->plt.offset = (bfd_vma) -1; 1733 1734 /* If this is a weak symbol, and there is a real definition, the 1735 processor independent code will have arranged for us to see the 1736 real definition first, and we can just use the same value. */ 1737 if (h->u.weakdef != NULL) 1738 { 1739 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 1740 || h->u.weakdef->root.type == bfd_link_hash_defweak); 1741 h->root.u.def.section = h->u.weakdef->root.u.def.section; 1742 h->root.u.def.value = h->u.weakdef->root.u.def.value; 1743 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) 1744 h->non_got_ref = h->u.weakdef->non_got_ref; 1745 return TRUE; 1746 } 1747 1748 /* This is a reference to a symbol defined by a dynamic object which 1749 is not a function. */ 1750 1751 /* If we are creating a shared library, we must presume that the 1752 only references to the symbol are via the global offset table. 1753 For such cases we need not do anything here; the relocations will 1754 be handled correctly by relocate_section. */ 1755 if (bfd_link_pic (info)) 1756 return TRUE; 1757 1758 /* If there are no references to this symbol that do not use the 1759 GOT, we don't need to generate a copy reloc. */ 1760 if (!h->non_got_ref) 1761 return TRUE; 1762 1763 /* If -z nocopyreloc was given, we won't generate them either. */ 1764 if (info->nocopyreloc) 1765 { 1766 h->non_got_ref = 0; 1767 return TRUE; 1768 } 1769 1770 if (ELIMINATE_COPY_RELOCS) 1771 { 1772 struct elf_s390_link_hash_entry * eh; 1773 struct elf_dyn_relocs *p; 1774 1775 eh = (struct elf_s390_link_hash_entry *) h; 1776 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1777 { 1778 s = p->sec->output_section; 1779 if (s != NULL && (s->flags & SEC_READONLY) != 0) 1780 break; 1781 } 1782 1783 /* If we didn't find any dynamic relocs in read-only sections, then 1784 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 1785 if (p == NULL) 1786 { 1787 h->non_got_ref = 0; 1788 return TRUE; 1789 } 1790 } 1791 1792 /* We must allocate the symbol in our .dynbss section, which will 1793 become part of the .bss section of the executable. There will be 1794 an entry for this symbol in the .dynsym section. The dynamic 1795 object will contain position independent code, so all references 1796 from the dynamic object to this symbol will go through the global 1797 offset table. The dynamic linker will use the .dynsym entry to 1798 determine the address it must put in the global offset table, so 1799 both the dynamic object and the regular object will refer to the 1800 same memory location for the variable. */ 1801 1802 htab = elf_s390_hash_table (info); 1803 1804 /* We must generate a R_390_COPY reloc to tell the dynamic linker to 1805 copy the initial value out of the dynamic object and into the 1806 runtime process image. */ 1807 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 1808 { 1809 htab->srelbss->size += sizeof (Elf32_External_Rela); 1810 h->needs_copy = 1; 1811 } 1812 1813 s = htab->sdynbss; 1814 1815 return _bfd_elf_adjust_dynamic_copy (info, h, s); 1816 } 1817 1818 /* Allocate space in .plt, .got and associated reloc sections for 1819 dynamic relocs. */ 1820 1821 static bfd_boolean 1822 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) 1823 { 1824 struct bfd_link_info *info; 1825 struct elf_s390_link_hash_table *htab; 1826 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h; 1827 struct elf_dyn_relocs *p; 1828 1829 if (h->root.type == bfd_link_hash_indirect) 1830 return TRUE; 1831 1832 info = (struct bfd_link_info *) inf; 1833 htab = elf_s390_hash_table (info); 1834 1835 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it 1836 here if it is defined and referenced in a non-shared object. */ 1837 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 1838 return s390_elf_allocate_ifunc_dyn_relocs (info, h); 1839 else if (htab->elf.dynamic_sections_created 1840 && h->plt.refcount > 0) 1841 { 1842 /* Make sure this symbol is output as a dynamic symbol. 1843 Undefined weak syms won't yet be marked as dynamic. */ 1844 if (h->dynindx == -1 1845 && !h->forced_local) 1846 { 1847 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1848 return FALSE; 1849 } 1850 1851 if (bfd_link_pic (info) 1852 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) 1853 { 1854 asection *s = htab->elf.splt; 1855 1856 /* If this is the first .plt entry, make room for the special 1857 first entry. */ 1858 if (s->size == 0) 1859 s->size += PLT_FIRST_ENTRY_SIZE; 1860 1861 h->plt.offset = s->size; 1862 1863 /* If this symbol is not defined in a regular file, and we are 1864 not generating a shared library, then set the symbol to this 1865 location in the .plt. This is required to make function 1866 pointers compare as equal between the normal executable and 1867 the shared library. */ 1868 if (! bfd_link_pic (info) 1869 && !h->def_regular) 1870 { 1871 h->root.u.def.section = s; 1872 h->root.u.def.value = h->plt.offset; 1873 } 1874 1875 /* Make room for this entry. */ 1876 s->size += PLT_ENTRY_SIZE; 1877 1878 /* We also need to make an entry in the .got.plt section, which 1879 will be placed in the .got section by the linker script. */ 1880 htab->elf.sgotplt->size += GOT_ENTRY_SIZE; 1881 1882 /* We also need to make an entry in the .rela.plt section. */ 1883 htab->elf.srelplt->size += sizeof (Elf32_External_Rela); 1884 } 1885 else 1886 { 1887 h->plt.offset = (bfd_vma) -1; 1888 h->needs_plt = 0; 1889 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1890 } 1891 } 1892 else 1893 { 1894 h->plt.offset = (bfd_vma) -1; 1895 h->needs_plt = 0; 1896 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1897 } 1898 1899 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to 1900 the binary, we can optimize a bit. IE32 and GOTIE32 get converted 1901 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT 1902 we can save the dynamic TLS relocation. */ 1903 if (h->got.refcount > 0 1904 && !bfd_link_pic (info) 1905 && h->dynindx == -1 1906 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) 1907 { 1908 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) 1909 /* For the GOTIE access without a literal pool entry the offset has 1910 to be stored somewhere. The immediate value in the instruction 1911 is not bit enough so the value is stored in the got. */ 1912 { 1913 h->got.offset = htab->elf.sgot->size; 1914 htab->elf.sgot->size += GOT_ENTRY_SIZE; 1915 } 1916 else 1917 h->got.offset = (bfd_vma) -1; 1918 } 1919 else if (h->got.refcount > 0) 1920 { 1921 asection *s; 1922 bfd_boolean dyn; 1923 int tls_type = elf_s390_hash_entry(h)->tls_type; 1924 1925 /* Make sure this symbol is output as a dynamic symbol. 1926 Undefined weak syms won't yet be marked as dynamic. */ 1927 if (h->dynindx == -1 1928 && !h->forced_local) 1929 { 1930 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1931 return FALSE; 1932 } 1933 1934 s = htab->elf.sgot; 1935 h->got.offset = s->size; 1936 s->size += GOT_ENTRY_SIZE; 1937 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */ 1938 if (tls_type == GOT_TLS_GD) 1939 s->size += GOT_ENTRY_SIZE; 1940 dyn = htab->elf.dynamic_sections_created; 1941 /* R_390_TLS_IE32 needs one dynamic relocation, 1942 R_390_TLS_GD32 needs one if local symbol and two if global. */ 1943 if ((tls_type == GOT_TLS_GD && h->dynindx == -1) 1944 || tls_type >= GOT_TLS_IE) 1945 htab->elf.srelgot->size += sizeof (Elf32_External_Rela); 1946 else if (tls_type == GOT_TLS_GD) 1947 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela); 1948 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1949 || h->root.type != bfd_link_hash_undefweak) 1950 && (bfd_link_pic (info) 1951 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) 1952 htab->elf.srelgot->size += sizeof (Elf32_External_Rela); 1953 } 1954 else 1955 h->got.offset = (bfd_vma) -1; 1956 1957 if (eh->dyn_relocs == NULL) 1958 return TRUE; 1959 1960 /* In the shared -Bsymbolic case, discard space allocated for 1961 dynamic pc-relative relocs against symbols which turn out to be 1962 defined in regular objects. For the normal shared case, discard 1963 space for pc-relative relocs that have become local due to symbol 1964 visibility changes. */ 1965 1966 if (bfd_link_pic (info)) 1967 { 1968 if (SYMBOL_CALLS_LOCAL (info, h)) 1969 { 1970 struct elf_dyn_relocs **pp; 1971 1972 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 1973 { 1974 p->count -= p->pc_count; 1975 p->pc_count = 0; 1976 if (p->count == 0) 1977 *pp = p->next; 1978 else 1979 pp = &p->next; 1980 } 1981 } 1982 1983 /* Also discard relocs on undefined weak syms with non-default 1984 visibility. */ 1985 if (eh->dyn_relocs != NULL 1986 && h->root.type == bfd_link_hash_undefweak) 1987 { 1988 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 1989 eh->dyn_relocs = NULL; 1990 1991 /* Make sure undefined weak symbols are output as a dynamic 1992 symbol in PIEs. */ 1993 else if (h->dynindx == -1 1994 && !h->forced_local) 1995 { 1996 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1997 return FALSE; 1998 } 1999 } 2000 } 2001 else if (ELIMINATE_COPY_RELOCS) 2002 { 2003 /* For the non-shared case, discard space for relocs against 2004 symbols which turn out to need copy relocs or are not 2005 dynamic. */ 2006 2007 if (!h->non_got_ref 2008 && ((h->def_dynamic 2009 && !h->def_regular) 2010 || (htab->elf.dynamic_sections_created 2011 && (h->root.type == bfd_link_hash_undefweak 2012 || h->root.type == bfd_link_hash_undefined)))) 2013 { 2014 /* Make sure this symbol is output as a dynamic symbol. 2015 Undefined weak syms won't yet be marked as dynamic. */ 2016 if (h->dynindx == -1 2017 && !h->forced_local) 2018 { 2019 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2020 return FALSE; 2021 } 2022 2023 /* If that succeeded, we know we'll be keeping all the 2024 relocs. */ 2025 if (h->dynindx != -1) 2026 goto keep; 2027 } 2028 2029 eh->dyn_relocs = NULL; 2030 2031 keep: ; 2032 } 2033 2034 /* Finally, allocate space. */ 2035 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2036 { 2037 asection *sreloc = elf_section_data (p->sec)->sreloc; 2038 2039 sreloc->size += p->count * sizeof (Elf32_External_Rela); 2040 } 2041 2042 return TRUE; 2043 } 2044 2045 /* Find any dynamic relocs that apply to read-only sections. */ 2046 2047 static bfd_boolean 2048 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) 2049 { 2050 struct elf_s390_link_hash_entry *eh; 2051 struct elf_dyn_relocs *p; 2052 2053 eh = (struct elf_s390_link_hash_entry *) h; 2054 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2055 { 2056 asection *s = p->sec->output_section; 2057 2058 if (s != NULL && (s->flags & SEC_READONLY) != 0) 2059 { 2060 struct bfd_link_info *info = (struct bfd_link_info *) inf; 2061 2062 info->flags |= DF_TEXTREL; 2063 2064 /* Not an error, just cut short the traversal. */ 2065 return FALSE; 2066 } 2067 } 2068 return TRUE; 2069 } 2070 2071 /* Set the sizes of the dynamic sections. */ 2072 2073 static bfd_boolean 2074 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 2075 struct bfd_link_info *info) 2076 { 2077 struct elf_s390_link_hash_table *htab; 2078 bfd *dynobj; 2079 asection *s; 2080 bfd_boolean relocs; 2081 bfd *ibfd; 2082 2083 htab = elf_s390_hash_table (info); 2084 dynobj = htab->elf.dynobj; 2085 if (dynobj == NULL) 2086 abort (); 2087 2088 if (htab->elf.dynamic_sections_created) 2089 { 2090 /* Set the contents of the .interp section to the interpreter. */ 2091 if (bfd_link_executable (info) && !info->nointerp) 2092 { 2093 s = bfd_get_linker_section (dynobj, ".interp"); 2094 if (s == NULL) 2095 abort (); 2096 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 2097 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 2098 } 2099 } 2100 2101 /* Set up .got offsets for local syms, and space for local dynamic 2102 relocs. */ 2103 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 2104 { 2105 bfd_signed_vma *local_got; 2106 bfd_signed_vma *end_local_got; 2107 char *local_tls_type; 2108 bfd_size_type locsymcount; 2109 Elf_Internal_Shdr *symtab_hdr; 2110 asection *srela; 2111 struct plt_entry *local_plt; 2112 unsigned int i; 2113 2114 if (! is_s390_elf (ibfd)) 2115 continue; 2116 2117 for (s = ibfd->sections; s != NULL; s = s->next) 2118 { 2119 struct elf_dyn_relocs *p; 2120 2121 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) 2122 { 2123 if (!bfd_is_abs_section (p->sec) 2124 && bfd_is_abs_section (p->sec->output_section)) 2125 { 2126 /* Input section has been discarded, either because 2127 it is a copy of a linkonce section or due to 2128 linker script /DISCARD/, so we'll be discarding 2129 the relocs too. */ 2130 } 2131 else if (p->count != 0) 2132 { 2133 srela = elf_section_data (p->sec)->sreloc; 2134 srela->size += p->count * sizeof (Elf32_External_Rela); 2135 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2136 info->flags |= DF_TEXTREL; 2137 } 2138 } 2139 } 2140 2141 local_got = elf_local_got_refcounts (ibfd); 2142 if (!local_got) 2143 continue; 2144 2145 symtab_hdr = &elf_symtab_hdr (ibfd); 2146 locsymcount = symtab_hdr->sh_info; 2147 end_local_got = local_got + locsymcount; 2148 local_tls_type = elf_s390_local_got_tls_type (ibfd); 2149 s = htab->elf.sgot; 2150 srela = htab->elf.srelgot; 2151 for (; local_got < end_local_got; ++local_got, ++local_tls_type) 2152 { 2153 if (*local_got > 0) 2154 { 2155 *local_got = s->size; 2156 s->size += GOT_ENTRY_SIZE; 2157 if (*local_tls_type == GOT_TLS_GD) 2158 s->size += GOT_ENTRY_SIZE; 2159 if (bfd_link_pic (info)) 2160 srela->size += sizeof (Elf32_External_Rela); 2161 } 2162 else 2163 *local_got = (bfd_vma) -1; 2164 } 2165 local_plt = elf_s390_local_plt (ibfd); 2166 for (i = 0; i < symtab_hdr->sh_info; i++) 2167 { 2168 if (local_plt[i].plt.refcount > 0) 2169 { 2170 local_plt[i].plt.offset = htab->elf.iplt->size; 2171 htab->elf.iplt->size += PLT_ENTRY_SIZE; 2172 htab->elf.igotplt->size += GOT_ENTRY_SIZE; 2173 htab->elf.irelplt->size += RELA_ENTRY_SIZE; 2174 } 2175 else 2176 local_plt[i].plt.offset = (bfd_vma) -1; 2177 } 2178 } 2179 2180 if (htab->tls_ldm_got.refcount > 0) 2181 { 2182 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32 2183 relocs. */ 2184 htab->tls_ldm_got.offset = htab->elf.sgot->size; 2185 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; 2186 htab->elf.srelgot->size += sizeof (Elf32_External_Rela); 2187 } 2188 else 2189 htab->tls_ldm_got.offset = -1; 2190 2191 /* Allocate global sym .plt and .got entries, and space for global 2192 sym dynamic relocs. */ 2193 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); 2194 2195 /* We now have determined the sizes of the various dynamic sections. 2196 Allocate memory for them. */ 2197 relocs = FALSE; 2198 for (s = dynobj->sections; s != NULL; s = s->next) 2199 { 2200 if ((s->flags & SEC_LINKER_CREATED) == 0) 2201 continue; 2202 2203 if (s == htab->elf.splt 2204 || s == htab->elf.sgot 2205 || s == htab->elf.sgotplt 2206 || s == htab->sdynbss 2207 || s == htab->elf.iplt 2208 || s == htab->elf.igotplt 2209 || s == htab->irelifunc) 2210 { 2211 /* Strip this section if we don't need it; see the 2212 comment below. */ 2213 } 2214 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) 2215 { 2216 if (s->size != 0) 2217 relocs = TRUE; 2218 2219 /* We use the reloc_count field as a counter if we need 2220 to copy relocs into the output file. */ 2221 s->reloc_count = 0; 2222 } 2223 else 2224 { 2225 /* It's not one of our sections, so don't allocate space. */ 2226 continue; 2227 } 2228 2229 if (s->size == 0) 2230 { 2231 /* If we don't need this section, strip it from the 2232 output file. This is to handle .rela.bss and 2233 .rela.plt. We must create it in 2234 create_dynamic_sections, because it must be created 2235 before the linker maps input sections to output 2236 sections. The linker does that before 2237 adjust_dynamic_symbol is called, and it is that 2238 function which decides whether anything needs to go 2239 into these sections. */ 2240 2241 s->flags |= SEC_EXCLUDE; 2242 continue; 2243 } 2244 2245 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2246 continue; 2247 2248 /* Allocate memory for the section contents. We use bfd_zalloc 2249 here in case unused entries are not reclaimed before the 2250 section's contents are written out. This should not happen, 2251 but this way if it does, we get a R_390_NONE reloc instead 2252 of garbage. */ 2253 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 2254 if (s->contents == NULL) 2255 return FALSE; 2256 } 2257 2258 if (htab->elf.dynamic_sections_created) 2259 { 2260 /* Add some entries to the .dynamic section. We fill in the 2261 values later, in elf_s390_finish_dynamic_sections, but we 2262 must add the entries now so that we get the correct size for 2263 the .dynamic section. The DT_DEBUG entry is filled in by the 2264 dynamic linker and used by the debugger. */ 2265 #define add_dynamic_entry(TAG, VAL) \ 2266 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2267 2268 if (bfd_link_executable (info)) 2269 { 2270 if (!add_dynamic_entry (DT_DEBUG, 0)) 2271 return FALSE; 2272 } 2273 2274 if (htab->elf.splt->size != 0) 2275 { 2276 if (!add_dynamic_entry (DT_PLTGOT, 0) 2277 || !add_dynamic_entry (DT_PLTRELSZ, 0) 2278 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 2279 || !add_dynamic_entry (DT_JMPREL, 0)) 2280 return FALSE; 2281 } 2282 2283 if (relocs) 2284 { 2285 if (!add_dynamic_entry (DT_RELA, 0) 2286 || !add_dynamic_entry (DT_RELASZ, 0) 2287 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 2288 return FALSE; 2289 2290 /* If any dynamic relocs apply to a read-only section, 2291 then we need a DT_TEXTREL entry. */ 2292 if ((info->flags & DF_TEXTREL) == 0) 2293 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info); 2294 2295 if ((info->flags & DF_TEXTREL) != 0) 2296 { 2297 if (!add_dynamic_entry (DT_TEXTREL, 0)) 2298 return FALSE; 2299 } 2300 } 2301 } 2302 #undef add_dynamic_entry 2303 2304 return TRUE; 2305 } 2306 2307 /* Return the base VMA address which should be subtracted from real addresses 2308 when resolving @dtpoff relocation. 2309 This is PT_TLS segment p_vaddr. */ 2310 2311 static bfd_vma 2312 dtpoff_base (struct bfd_link_info *info) 2313 { 2314 /* If tls_sec is NULL, we should have signalled an error already. */ 2315 if (elf_hash_table (info)->tls_sec == NULL) 2316 return 0; 2317 return elf_hash_table (info)->tls_sec->vma; 2318 } 2319 2320 /* Return the relocation value for @tpoff relocation 2321 if STT_TLS virtual address is ADDRESS. */ 2322 2323 static bfd_vma 2324 tpoff (struct bfd_link_info *info, bfd_vma address) 2325 { 2326 struct elf_link_hash_table *htab = elf_hash_table (info); 2327 2328 /* If tls_sec is NULL, we should have signalled an error already. */ 2329 if (htab->tls_sec == NULL) 2330 return 0; 2331 return htab->tls_size + htab->tls_sec->vma - address; 2332 } 2333 2334 /* Complain if TLS instruction relocation is against an invalid 2335 instruction. */ 2336 2337 static void 2338 invalid_tls_insn (bfd *input_bfd, 2339 asection *input_section, 2340 Elf_Internal_Rela *rel) 2341 { 2342 reloc_howto_type *howto; 2343 2344 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info); 2345 (*_bfd_error_handler) 2346 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"), 2347 input_bfd, 2348 input_section, 2349 (long) rel->r_offset, 2350 howto->name); 2351 bfd_set_error (bfd_error_bad_value); 2352 } 2353 2354 /* Relocate a 390 ELF section. */ 2355 2356 static bfd_boolean 2357 elf_s390_relocate_section (bfd *output_bfd, 2358 struct bfd_link_info *info, 2359 bfd *input_bfd, 2360 asection *input_section, 2361 bfd_byte *contents, 2362 Elf_Internal_Rela *relocs, 2363 Elf_Internal_Sym *local_syms, 2364 asection **local_sections) 2365 { 2366 struct elf_s390_link_hash_table *htab; 2367 Elf_Internal_Shdr *symtab_hdr; 2368 struct elf_link_hash_entry **sym_hashes; 2369 bfd_vma *local_got_offsets; 2370 Elf_Internal_Rela *rel; 2371 Elf_Internal_Rela *relend; 2372 2373 BFD_ASSERT (is_s390_elf (input_bfd)); 2374 2375 htab = elf_s390_hash_table (info); 2376 symtab_hdr = &elf_symtab_hdr (input_bfd); 2377 sym_hashes = elf_sym_hashes (input_bfd); 2378 local_got_offsets = elf_local_got_offsets (input_bfd); 2379 2380 rel = relocs; 2381 relend = relocs + input_section->reloc_count; 2382 for (; rel < relend; rel++) 2383 { 2384 unsigned int r_type; 2385 reloc_howto_type *howto; 2386 unsigned long r_symndx; 2387 struct elf_link_hash_entry *h; 2388 Elf_Internal_Sym *sym; 2389 asection *sec; 2390 bfd_vma off; 2391 bfd_vma relocation; 2392 bfd_boolean unresolved_reloc; 2393 bfd_reloc_status_type r; 2394 int tls_type; 2395 asection *base_got = htab->elf.sgot; 2396 2397 r_type = ELF32_R_TYPE (rel->r_info); 2398 if (r_type == (int) R_390_GNU_VTINHERIT 2399 || r_type == (int) R_390_GNU_VTENTRY) 2400 continue; 2401 if (r_type >= (int) R_390_max) 2402 { 2403 bfd_set_error (bfd_error_bad_value); 2404 return FALSE; 2405 } 2406 2407 howto = elf_howto_table + r_type; 2408 r_symndx = ELF32_R_SYM (rel->r_info); 2409 2410 h = NULL; 2411 sym = NULL; 2412 sec = NULL; 2413 unresolved_reloc = FALSE; 2414 if (r_symndx < symtab_hdr->sh_info) 2415 { 2416 sym = local_syms + r_symndx; 2417 sec = local_sections[r_symndx]; 2418 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 2419 { 2420 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd); 2421 if (local_plt == NULL) 2422 return FALSE; 2423 2424 /* Address of the PLT slot. */ 2425 relocation = (htab->elf.iplt->output_section->vma 2426 + htab->elf.iplt->output_offset 2427 + local_plt[r_symndx].plt.offset); 2428 2429 switch (r_type) 2430 { 2431 case R_390_PLTOFF16: 2432 case R_390_PLTOFF32: 2433 relocation -= htab->elf.sgot->output_section->vma; 2434 break; 2435 case R_390_GOTPLT12: 2436 case R_390_GOTPLT16: 2437 case R_390_GOTPLT20: 2438 case R_390_GOTPLT32: 2439 case R_390_GOTPLTENT: 2440 case R_390_GOT12: 2441 case R_390_GOT16: 2442 case R_390_GOT20: 2443 case R_390_GOT32: 2444 case R_390_GOTENT: 2445 { 2446 /* Write the PLT slot address into the GOT slot. */ 2447 bfd_put_32 (output_bfd, relocation, 2448 htab->elf.sgot->contents + 2449 local_got_offsets[r_symndx]); 2450 relocation = (local_got_offsets[r_symndx] + 2451 htab->elf.sgot->output_offset); 2452 2453 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) 2454 relocation += htab->elf.sgot->output_section->vma; 2455 break; 2456 } 2457 default: 2458 break; 2459 } 2460 /* The output section is needed later in 2461 finish_dynamic_section when creating the dynamic 2462 relocation. */ 2463 local_plt[r_symndx].sec = sec; 2464 goto do_relocation; 2465 } 2466 else 2467 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2468 } 2469 else 2470 { 2471 bfd_boolean warned ATTRIBUTE_UNUSED; 2472 bfd_boolean ignored ATTRIBUTE_UNUSED; 2473 2474 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 2475 r_symndx, symtab_hdr, sym_hashes, 2476 h, sec, relocation, 2477 unresolved_reloc, warned, ignored); 2478 } 2479 2480 if (sec != NULL && discarded_section (sec)) 2481 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2482 rel, 1, relend, howto, 0, contents); 2483 2484 if (bfd_link_relocatable (info)) 2485 continue; 2486 2487 switch (r_type) 2488 { 2489 case R_390_GOTPLT12: 2490 case R_390_GOTPLT16: 2491 case R_390_GOTPLT20: 2492 case R_390_GOTPLT32: 2493 case R_390_GOTPLTENT: 2494 /* There are three cases for a GOTPLT relocation. 1) The 2495 relocation is against the jump slot entry of a plt that 2496 will get emitted to the output file. 2) The relocation 2497 is against the jump slot of a plt entry that has been 2498 removed. elf_s390_adjust_gotplt has created a GOT entry 2499 as replacement. 3) The relocation is against a local symbol. 2500 Cases 2) and 3) are the same as the GOT relocation code 2501 so we just have to test for case 1 and fall through for 2502 the other two. */ 2503 if (h != NULL && h->plt.offset != (bfd_vma) -1) 2504 { 2505 bfd_vma plt_index; 2506 2507 if (s390_is_ifunc_symbol_p (h)) 2508 { 2509 plt_index = h->plt.offset / PLT_ENTRY_SIZE; 2510 relocation = (plt_index * GOT_ENTRY_SIZE + 2511 htab->elf.igotplt->output_offset); 2512 if (r_type == R_390_GOTPLTENT) 2513 relocation += htab->elf.igotplt->output_section->vma; 2514 } 2515 else 2516 { 2517 /* Calc. index no. 2518 Current offset - size first entry / entry size. */ 2519 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / 2520 PLT_ENTRY_SIZE; 2521 2522 /* Offset in GOT is PLT index plus GOT headers(3) 2523 times 4, addr & GOT addr. */ 2524 relocation = (plt_index + 3) * GOT_ENTRY_SIZE; 2525 if (r_type == R_390_GOTPLTENT) 2526 relocation += htab->elf.sgot->output_section->vma; 2527 } 2528 unresolved_reloc = FALSE; 2529 2530 } 2531 /* Fall through. */ 2532 2533 case R_390_GOT12: 2534 case R_390_GOT16: 2535 case R_390_GOT20: 2536 case R_390_GOT32: 2537 case R_390_GOTENT: 2538 /* Relocation is to the entry for this symbol in the global 2539 offset table. */ 2540 if (base_got == NULL) 2541 abort (); 2542 2543 if (h != NULL) 2544 { 2545 bfd_boolean dyn; 2546 2547 off = h->got.offset; 2548 dyn = htab->elf.dynamic_sections_created; 2549 2550 if (s390_is_ifunc_symbol_p (h)) 2551 { 2552 BFD_ASSERT (h->plt.offset != (bfd_vma) -1); 2553 if (off == (bfd_vma)-1) 2554 { 2555 /* No explicit GOT usage so redirect to the 2556 got.iplt slot. */ 2557 base_got = htab->elf.igotplt; 2558 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE; 2559 } 2560 else 2561 { 2562 /* Explicit GOT slots must contain the address 2563 of the PLT slot. This will be handled in 2564 finish_dynamic_symbol. */ 2565 } 2566 } 2567 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 2568 bfd_link_pic (info), 2569 h) 2570 || (bfd_link_pic (info) 2571 && SYMBOL_REFERENCES_LOCAL (info, h)) 2572 || (ELF_ST_VISIBILITY (h->other) 2573 && h->root.type == bfd_link_hash_undefweak)) 2574 2575 { 2576 /* This is actually a static link, or it is a 2577 -Bsymbolic link and the symbol is defined 2578 locally, or the symbol was forced to be local 2579 because of a version file. We must initialize 2580 this entry in the global offset table. Since the 2581 offset must always be a multiple of 2, we use the 2582 least significant bit to record whether we have 2583 initialized it already. 2584 2585 When doing a dynamic link, we create a .rel.got 2586 relocation entry to initialize the value. This 2587 is done in the finish_dynamic_symbol routine. */ 2588 if ((off & 1) != 0) 2589 off &= ~1; 2590 else 2591 { 2592 bfd_put_32 (output_bfd, relocation, 2593 base_got->contents + off); 2594 h->got.offset |= 1; 2595 } 2596 2597 if ((h->def_regular 2598 && bfd_link_pic (info) 2599 && SYMBOL_REFERENCES_LOCAL (info, h)) 2600 /* lrl rx,sym@GOTENT -> larl rx, sym */ 2601 && ((r_type == R_390_GOTENT 2602 && (bfd_get_16 (input_bfd, 2603 contents + rel->r_offset - 2) 2604 & 0xff0f) == 0xc40d) 2605 /* ly rx, sym@GOT(r12) -> larl rx, sym */ 2606 || (r_type == R_390_GOT20 2607 && (bfd_get_32 (input_bfd, 2608 contents + rel->r_offset - 2) 2609 & 0xff00f000) == 0xe300c000 2610 && bfd_get_8 (input_bfd, 2611 contents + rel->r_offset + 3) == 0x58))) 2612 { 2613 unsigned short new_insn = 2614 (0xc000 | (bfd_get_8 (input_bfd, 2615 contents + rel->r_offset - 1) & 0xf0)); 2616 bfd_put_16 (output_bfd, new_insn, 2617 contents + rel->r_offset - 2); 2618 r_type = R_390_PC32DBL; 2619 rel->r_addend = 2; 2620 howto = elf_howto_table + r_type; 2621 relocation = h->root.u.def.value 2622 + h->root.u.def.section->output_section->vma 2623 + h->root.u.def.section->output_offset; 2624 goto do_relocation; 2625 } 2626 } 2627 else 2628 unresolved_reloc = FALSE; 2629 } 2630 else 2631 { 2632 if (local_got_offsets == NULL) 2633 abort (); 2634 2635 off = local_got_offsets[r_symndx]; 2636 2637 /* The offset must always be a multiple of 4. We use 2638 the least significant bit to record whether we have 2639 already generated the necessary reloc. */ 2640 if ((off & 1) != 0) 2641 off &= ~1; 2642 else 2643 { 2644 bfd_put_32 (output_bfd, relocation, 2645 htab->elf.sgot->contents + off); 2646 2647 if (bfd_link_pic (info)) 2648 { 2649 asection *srelgot; 2650 Elf_Internal_Rela outrel; 2651 bfd_byte *loc; 2652 2653 srelgot = htab->elf.srelgot; 2654 if (srelgot == NULL) 2655 abort (); 2656 2657 outrel.r_offset = (htab->elf.sgot->output_section->vma 2658 + htab->elf.sgot->output_offset 2659 + off); 2660 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 2661 outrel.r_addend = relocation; 2662 loc = srelgot->contents; 2663 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 2664 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2665 } 2666 2667 local_got_offsets[r_symndx] |= 1; 2668 } 2669 } 2670 2671 if (off >= (bfd_vma) -2) 2672 abort (); 2673 2674 relocation = base_got->output_offset + off; 2675 2676 /* For @GOTENT the relocation is against the offset between 2677 the instruction and the symbols entry in the GOT and not 2678 between the start of the GOT and the symbols entry. We 2679 add the vma of the GOT to get the correct value. */ 2680 if ( r_type == R_390_GOTENT 2681 || r_type == R_390_GOTPLTENT) 2682 relocation += base_got->output_section->vma; 2683 2684 break; 2685 2686 case R_390_GOTOFF16: 2687 case R_390_GOTOFF32: 2688 /* Relocation is relative to the start of the global offset 2689 table. */ 2690 2691 if (h != NULL 2692 && s390_is_ifunc_symbol_p (h) 2693 && h->def_regular 2694 && !bfd_link_executable (info)) 2695 { 2696 relocation = (htab->elf.iplt->output_section->vma 2697 + htab->elf.iplt->output_offset 2698 + h->plt.offset 2699 - htab->elf.sgot->output_section->vma); 2700 goto do_relocation; 2701 } 2702 2703 /* Note that sgot->output_offset is not involved in this 2704 calculation. We always want the start of .got. If we 2705 defined _GLOBAL_OFFSET_TABLE in a different way, as is 2706 permitted by the ABI, we might have to change this 2707 calculation. */ 2708 relocation -= htab->elf.sgot->output_section->vma; 2709 break; 2710 2711 case R_390_GOTPC: 2712 case R_390_GOTPCDBL: 2713 /* Use global offset table as symbol value. */ 2714 relocation = htab->elf.sgot->output_section->vma; 2715 unresolved_reloc = FALSE; 2716 break; 2717 2718 case R_390_PLT12DBL: 2719 case R_390_PLT16DBL: 2720 case R_390_PLT24DBL: 2721 case R_390_PLT32DBL: 2722 case R_390_PLT32: 2723 /* Relocation is to the entry for this symbol in the 2724 procedure linkage table. */ 2725 2726 /* Resolve a PLT32 reloc against a local symbol directly, 2727 without using the procedure linkage table. */ 2728 if (h == NULL) 2729 break; 2730 2731 if (h->plt.offset == (bfd_vma) -1 2732 || (htab->elf.splt == NULL && htab->elf.iplt == NULL)) 2733 { 2734 /* We didn't make a PLT entry for this symbol. This 2735 happens when statically linking PIC code, or when 2736 using -Bsymbolic. */ 2737 break; 2738 } 2739 2740 if (s390_is_ifunc_symbol_p (h)) 2741 relocation = (htab->elf.iplt->output_section->vma 2742 + htab->elf.iplt->output_offset 2743 + h->plt.offset); 2744 else 2745 relocation = (htab->elf.splt->output_section->vma 2746 + htab->elf.splt->output_offset 2747 + h->plt.offset); 2748 unresolved_reloc = FALSE; 2749 break; 2750 2751 case R_390_PLTOFF16: 2752 case R_390_PLTOFF32: 2753 /* Relocation is to the entry for this symbol in the 2754 procedure linkage table relative to the start of the GOT. */ 2755 2756 /* For local symbols or if we didn't make a PLT entry for 2757 this symbol resolve the symbol directly. */ 2758 if (h == NULL 2759 || h->plt.offset == (bfd_vma) -1 2760 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) 2761 { 2762 relocation -= htab->elf.sgot->output_section->vma; 2763 break; 2764 } 2765 2766 if (s390_is_ifunc_symbol_p (h)) 2767 relocation = (htab->elf.iplt->output_section->vma 2768 + htab->elf.iplt->output_offset 2769 + h->plt.offset 2770 - htab->elf.sgot->output_section->vma); 2771 else 2772 relocation = (htab->elf.splt->output_section->vma 2773 + htab->elf.splt->output_offset 2774 + h->plt.offset 2775 - htab->elf.sgot->output_section->vma); 2776 unresolved_reloc = FALSE; 2777 break; 2778 2779 case R_390_PC16: 2780 case R_390_PC12DBL: 2781 case R_390_PC16DBL: 2782 case R_390_PC24DBL: 2783 case R_390_PC32DBL: 2784 case R_390_PC32: 2785 if (h != NULL 2786 && s390_is_ifunc_symbol_p (h) 2787 && h->def_regular 2788 && !bfd_link_executable (info)) 2789 { 2790 /* This will not work our if the function does not 2791 happen to set up the GOT pointer for some other 2792 reason. 31 bit PLT entries require r12 to hold the 2793 GOT pointer. 2794 FIXME: Implement an errorcheck. 2795 NOTE: It will work when brasl is not available 2796 (e.g. with -m31 -march=g5) since a local function 2797 call then does use GOTOFF which implies r12 being set 2798 up. */ 2799 relocation = (htab->elf.iplt->output_section->vma 2800 + htab->elf.iplt->output_offset 2801 + h ->plt.offset); 2802 goto do_relocation; 2803 } 2804 2805 case R_390_8: 2806 case R_390_16: 2807 case R_390_32: 2808 if (h != NULL 2809 && s390_is_ifunc_symbol_p (h) 2810 && h->def_regular) 2811 { 2812 if (!bfd_link_pic (info) || !h->non_got_ref) 2813 { 2814 /* For a non-shared object STT_GNU_IFUNC symbol must 2815 go through PLT. */ 2816 relocation = (htab->elf.iplt->output_section->vma 2817 + htab->elf.iplt->output_offset 2818 + h ->plt.offset); 2819 goto do_relocation; 2820 } 2821 else 2822 { 2823 /* For shared objects a runtime relocation is needed. */ 2824 2825 Elf_Internal_Rela outrel; 2826 asection *sreloc; 2827 2828 /* Need a dynamic relocation to get the real function 2829 address. */ 2830 outrel.r_offset = _bfd_elf_section_offset (output_bfd, 2831 info, 2832 input_section, 2833 rel->r_offset); 2834 if (outrel.r_offset == (bfd_vma) -1 2835 || outrel.r_offset == (bfd_vma) -2) 2836 abort (); 2837 2838 outrel.r_offset += (input_section->output_section->vma 2839 + input_section->output_offset); 2840 2841 if (h->dynindx == -1 2842 || h->forced_local 2843 || bfd_link_executable (info)) 2844 { 2845 /* This symbol is resolved locally. */ 2846 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE); 2847 outrel.r_addend = (h->root.u.def.value 2848 + h->root.u.def.section->output_section->vma 2849 + h->root.u.def.section->output_offset); 2850 } 2851 else 2852 { 2853 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 2854 outrel.r_addend = 0; 2855 } 2856 2857 sreloc = htab->elf.irelifunc; 2858 elf_append_rela (output_bfd, sreloc, &outrel); 2859 2860 /* If this reloc is against an external symbol, we 2861 do not want to fiddle with the addend. Otherwise, 2862 we need to include the symbol value so that it 2863 becomes an addend for the dynamic reloc. For an 2864 internal symbol, we have updated addend. */ 2865 continue; 2866 } 2867 } 2868 2869 if ((input_section->flags & SEC_ALLOC) == 0) 2870 break; 2871 2872 if ((bfd_link_pic (info) 2873 && (h == NULL 2874 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 2875 || h->root.type != bfd_link_hash_undefweak) 2876 && ((r_type != R_390_PC16 2877 && r_type != R_390_PC12DBL 2878 && r_type != R_390_PC16DBL 2879 && r_type != R_390_PC24DBL 2880 && r_type != R_390_PC32DBL 2881 && r_type != R_390_PC32) 2882 || !SYMBOL_CALLS_LOCAL (info, h))) 2883 || (ELIMINATE_COPY_RELOCS 2884 && !bfd_link_pic (info) 2885 && h != NULL 2886 && h->dynindx != -1 2887 && !h->non_got_ref 2888 && ((h->def_dynamic 2889 && !h->def_regular) 2890 || h->root.type == bfd_link_hash_undefweak 2891 || h->root.type == bfd_link_hash_undefined))) 2892 { 2893 Elf_Internal_Rela outrel; 2894 bfd_boolean skip, relocate; 2895 asection *sreloc; 2896 bfd_byte *loc; 2897 2898 /* When generating a shared object, these relocations 2899 are copied into the output file to be resolved at run 2900 time. */ 2901 2902 skip = FALSE; 2903 relocate = FALSE; 2904 2905 outrel.r_offset = 2906 _bfd_elf_section_offset (output_bfd, info, input_section, 2907 rel->r_offset); 2908 if (outrel.r_offset == (bfd_vma) -1) 2909 skip = TRUE; 2910 else if (outrel.r_offset == (bfd_vma) -2) 2911 skip = TRUE, relocate = TRUE; 2912 outrel.r_offset += (input_section->output_section->vma 2913 + input_section->output_offset); 2914 2915 if (skip) 2916 memset (&outrel, 0, sizeof outrel); 2917 else if (h != NULL 2918 && h->dynindx != -1 2919 && (r_type == R_390_PC16 2920 || r_type == R_390_PC12DBL 2921 || r_type == R_390_PC16DBL 2922 || r_type == R_390_PC24DBL 2923 || r_type == R_390_PC32DBL 2924 || r_type == R_390_PC32 2925 || !bfd_link_pic (info) 2926 || !SYMBOLIC_BIND (info, h) 2927 || !h->def_regular)) 2928 { 2929 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 2930 outrel.r_addend = rel->r_addend; 2931 } 2932 else 2933 { 2934 /* This symbol is local, or marked to become local. */ 2935 outrel.r_addend = relocation + rel->r_addend; 2936 if (r_type == R_390_32) 2937 { 2938 relocate = TRUE; 2939 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 2940 } 2941 else 2942 { 2943 long sindx; 2944 2945 if (bfd_is_abs_section (sec)) 2946 sindx = 0; 2947 else if (sec == NULL || sec->owner == NULL) 2948 { 2949 bfd_set_error(bfd_error_bad_value); 2950 return FALSE; 2951 } 2952 else 2953 { 2954 asection *osec; 2955 2956 osec = sec->output_section; 2957 sindx = elf_section_data (osec)->dynindx; 2958 if (sindx == 0) 2959 { 2960 osec = htab->elf.text_index_section; 2961 sindx = elf_section_data (osec)->dynindx; 2962 } 2963 BFD_ASSERT (sindx != 0); 2964 2965 /* We are turning this relocation into one 2966 against a section symbol, so subtract out 2967 the output section's address but not the 2968 offset of the input section in the output 2969 section. */ 2970 outrel.r_addend -= osec->vma; 2971 } 2972 outrel.r_info = ELF32_R_INFO (sindx, r_type); 2973 } 2974 } 2975 2976 sreloc = elf_section_data (input_section)->sreloc; 2977 if (sreloc == NULL) 2978 abort (); 2979 2980 loc = sreloc->contents; 2981 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 2982 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 2983 2984 /* If this reloc is against an external symbol, we do 2985 not want to fiddle with the addend. Otherwise, we 2986 need to include the symbol value so that it becomes 2987 an addend for the dynamic reloc. */ 2988 if (! relocate) 2989 continue; 2990 } 2991 break; 2992 2993 /* Relocations for tls literal pool entries. */ 2994 case R_390_TLS_IE32: 2995 if (bfd_link_pic (info)) 2996 { 2997 Elf_Internal_Rela outrel; 2998 asection *sreloc; 2999 bfd_byte *loc; 3000 3001 outrel.r_offset = rel->r_offset 3002 + input_section->output_section->vma 3003 + input_section->output_offset; 3004 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 3005 sreloc = elf_section_data (input_section)->sreloc; 3006 if (sreloc == NULL) 3007 abort (); 3008 loc = sreloc->contents; 3009 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 3010 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); 3011 } 3012 /* Fall through. */ 3013 3014 case R_390_TLS_GD32: 3015 case R_390_TLS_GOTIE32: 3016 r_type = elf_s390_tls_transition (info, r_type, h == NULL); 3017 tls_type = GOT_UNKNOWN; 3018 if (h == NULL && local_got_offsets) 3019 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 3020 else if (h != NULL) 3021 { 3022 tls_type = elf_s390_hash_entry(h)->tls_type; 3023 if (!bfd_link_pic (info) 3024 && h->dynindx == -1 3025 && tls_type >= GOT_TLS_IE) 3026 r_type = R_390_TLS_LE32; 3027 } 3028 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE) 3029 r_type = R_390_TLS_IE32; 3030 3031 if (r_type == R_390_TLS_LE32) 3032 { 3033 /* This relocation gets optimized away by the local exec 3034 access optimization. */ 3035 BFD_ASSERT (! unresolved_reloc); 3036 bfd_put_32 (output_bfd, -tpoff (info, relocation), 3037 contents + rel->r_offset); 3038 continue; 3039 } 3040 3041 if (htab->elf.sgot == NULL) 3042 abort (); 3043 3044 if (h != NULL) 3045 off = h->got.offset; 3046 else 3047 { 3048 if (local_got_offsets == NULL) 3049 abort (); 3050 3051 off = local_got_offsets[r_symndx]; 3052 } 3053 3054 emit_tls_relocs: 3055 3056 if ((off & 1) != 0) 3057 off &= ~1; 3058 else 3059 { 3060 Elf_Internal_Rela outrel; 3061 bfd_byte *loc; 3062 int dr_type, indx; 3063 3064 if (htab->elf.srelgot == NULL) 3065 abort (); 3066 3067 outrel.r_offset = (htab->elf.sgot->output_section->vma 3068 + htab->elf.sgot->output_offset + off); 3069 3070 indx = h && h->dynindx != -1 ? h->dynindx : 0; 3071 if (r_type == R_390_TLS_GD32) 3072 dr_type = R_390_TLS_DTPMOD; 3073 else 3074 dr_type = R_390_TLS_TPOFF; 3075 if (dr_type == R_390_TLS_TPOFF && indx == 0) 3076 outrel.r_addend = relocation - dtpoff_base (info); 3077 else 3078 outrel.r_addend = 0; 3079 outrel.r_info = ELF32_R_INFO (indx, dr_type); 3080 loc = htab->elf.srelgot->contents; 3081 loc += htab->elf.srelgot->reloc_count++ 3082 * sizeof (Elf32_External_Rela); 3083 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 3084 3085 if (r_type == R_390_TLS_GD32) 3086 { 3087 if (indx == 0) 3088 { 3089 BFD_ASSERT (! unresolved_reloc); 3090 bfd_put_32 (output_bfd, 3091 relocation - dtpoff_base (info), 3092 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); 3093 } 3094 else 3095 { 3096 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF); 3097 outrel.r_offset += GOT_ENTRY_SIZE; 3098 outrel.r_addend = 0; 3099 htab->elf.srelgot->reloc_count++; 3100 loc += sizeof (Elf32_External_Rela); 3101 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 3102 } 3103 } 3104 3105 if (h != NULL) 3106 h->got.offset |= 1; 3107 else 3108 local_got_offsets[r_symndx] |= 1; 3109 } 3110 3111 if (off >= (bfd_vma) -2) 3112 abort (); 3113 if (r_type == ELF32_R_TYPE (rel->r_info)) 3114 { 3115 relocation = htab->elf.sgot->output_offset + off; 3116 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT) 3117 relocation += htab->elf.sgot->output_section->vma; 3118 unresolved_reloc = FALSE; 3119 } 3120 else 3121 { 3122 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off, 3123 contents + rel->r_offset); 3124 continue; 3125 } 3126 break; 3127 3128 case R_390_TLS_GOTIE12: 3129 case R_390_TLS_GOTIE20: 3130 case R_390_TLS_IEENT: 3131 if (h == NULL) 3132 { 3133 if (local_got_offsets == NULL) 3134 abort(); 3135 off = local_got_offsets[r_symndx]; 3136 if (bfd_link_pic (info)) 3137 goto emit_tls_relocs; 3138 } 3139 else 3140 { 3141 off = h->got.offset; 3142 tls_type = elf_s390_hash_entry(h)->tls_type; 3143 if (bfd_link_pic (info) 3144 || h->dynindx != -1 3145 || tls_type < GOT_TLS_IE) 3146 goto emit_tls_relocs; 3147 } 3148 3149 if (htab->elf.sgot == NULL) 3150 abort (); 3151 3152 BFD_ASSERT (! unresolved_reloc); 3153 bfd_put_32 (output_bfd, -tpoff (info, relocation), 3154 htab->elf.sgot->contents + off); 3155 relocation = htab->elf.sgot->output_offset + off; 3156 if (r_type == R_390_TLS_IEENT) 3157 relocation += htab->elf.sgot->output_section->vma; 3158 unresolved_reloc = FALSE; 3159 break; 3160 3161 case R_390_TLS_LDM32: 3162 if (! bfd_link_pic (info)) 3163 /* The literal pool entry this relocation refers to gets ignored 3164 by the optimized code of the local exec model. Do nothing 3165 and the value will turn out zero. */ 3166 continue; 3167 3168 if (htab->elf.sgot == NULL) 3169 abort (); 3170 3171 off = htab->tls_ldm_got.offset; 3172 if (off & 1) 3173 off &= ~1; 3174 else 3175 { 3176 Elf_Internal_Rela outrel; 3177 bfd_byte *loc; 3178 3179 if (htab->elf.srelgot == NULL) 3180 abort (); 3181 3182 outrel.r_offset = (htab->elf.sgot->output_section->vma 3183 + htab->elf.sgot->output_offset + off); 3184 3185 bfd_put_32 (output_bfd, 0, 3186 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); 3187 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD); 3188 outrel.r_addend = 0; 3189 loc = htab->elf.srelgot->contents; 3190 loc += htab->elf.srelgot->reloc_count++ 3191 * sizeof (Elf32_External_Rela); 3192 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 3193 htab->tls_ldm_got.offset |= 1; 3194 } 3195 relocation = htab->elf.sgot->output_offset + off; 3196 unresolved_reloc = FALSE; 3197 break; 3198 3199 case R_390_TLS_LE32: 3200 if (bfd_link_dll (info)) 3201 { 3202 /* Linking a shared library with non-fpic code requires 3203 a R_390_TLS_TPOFF relocation. */ 3204 Elf_Internal_Rela outrel; 3205 asection *sreloc; 3206 bfd_byte *loc; 3207 int indx; 3208 3209 outrel.r_offset = rel->r_offset 3210 + input_section->output_section->vma 3211 + input_section->output_offset; 3212 if (h != NULL && h->dynindx != -1) 3213 indx = h->dynindx; 3214 else 3215 indx = 0; 3216 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF); 3217 if (indx == 0) 3218 outrel.r_addend = relocation - dtpoff_base (info); 3219 else 3220 outrel.r_addend = 0; 3221 sreloc = elf_section_data (input_section)->sreloc; 3222 if (sreloc == NULL) 3223 abort (); 3224 loc = sreloc->contents; 3225 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 3226 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 3227 } 3228 else 3229 { 3230 BFD_ASSERT (! unresolved_reloc); 3231 bfd_put_32 (output_bfd, -tpoff (info, relocation), 3232 contents + rel->r_offset); 3233 } 3234 continue; 3235 3236 case R_390_TLS_LDO32: 3237 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING)) 3238 relocation -= dtpoff_base (info); 3239 else 3240 /* When converting LDO to LE, we must negate. */ 3241 relocation = -tpoff (info, relocation); 3242 break; 3243 3244 /* Relocations for tls instructions. */ 3245 case R_390_TLS_LOAD: 3246 case R_390_TLS_GDCALL: 3247 case R_390_TLS_LDCALL: 3248 tls_type = GOT_UNKNOWN; 3249 if (h == NULL && local_got_offsets) 3250 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 3251 else if (h != NULL) 3252 tls_type = elf_s390_hash_entry(h)->tls_type; 3253 3254 if (tls_type == GOT_TLS_GD) 3255 continue; 3256 3257 if (r_type == R_390_TLS_LOAD) 3258 { 3259 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) 3260 { 3261 /* IE->LE transition. Four valid cases: 3262 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 3263 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 3264 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 3265 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ 3266 unsigned int insn, ry; 3267 3268 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 3269 ry = 0; 3270 if ((insn & 0xff00f000) == 0x58000000) 3271 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */ 3272 ry = (insn & 0x000f0000); 3273 else if ((insn & 0xff0f0000) == 0x58000000) 3274 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */ 3275 ry = (insn & 0x0000f000) << 4; 3276 else if ((insn & 0xff00f000) == 0x5800c000) 3277 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */ 3278 ry = (insn & 0x000f0000); 3279 else if ((insn & 0xff0f0000) == 0x580c0000) 3280 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ 3281 ry = (insn & 0x0000f000) << 4; 3282 else 3283 invalid_tls_insn (input_bfd, input_section, rel); 3284 insn = 0x18000700 | (insn & 0x00f00000) | ry; 3285 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 3286 } 3287 } 3288 else if (r_type == R_390_TLS_GDCALL) 3289 { 3290 unsigned int insn; 3291 3292 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 3293 if ((insn & 0xff000fff) != 0x4d000000 && 3294 (insn & 0xffff0000) != 0xc0e50000 && 3295 (insn & 0xff000000) != 0x0d000000) 3296 invalid_tls_insn (input_bfd, input_section, rel); 3297 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) 3298 { 3299 if ((insn & 0xff000000) == 0x0d000000) 3300 { 3301 /* GD->LE transition. 3302 basr rx, ry -> nopr r7 */ 3303 insn = 0x07070000 | (insn & 0xffff); 3304 } 3305 else if ((insn & 0xff000000) == 0x4d000000) 3306 { 3307 /* GD->LE transition. 3308 bas %r14,0(%rx,%r13) -> bc 0,0 */ 3309 insn = 0x47000000; 3310 } 3311 else 3312 { 3313 /* GD->LE transition. 3314 brasl %r14,_tls_get_offset@plt -> brcl 0,. */ 3315 insn = 0xc0040000; 3316 bfd_put_16 (output_bfd, 0x0000, 3317 contents + rel->r_offset + 4); 3318 } 3319 } 3320 else 3321 { 3322 /* If basr is used in the pic case to invoke 3323 _tls_get_offset, something went wrong before. */ 3324 if ((insn & 0xff000000) == 0x0d000000) 3325 invalid_tls_insn (input_bfd, input_section, rel); 3326 3327 if ((insn & 0xff000000) == 0x4d000000) 3328 { 3329 /* GD->IE transition. 3330 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */ 3331 insn = 0x5822c000; 3332 } 3333 else 3334 { 3335 /* GD->IE transition. 3336 brasl %r14,__tls_get_addr@plt -> 3337 l %r2,0(%r2,%r12) ; bcr 0,0 */ 3338 insn = 0x5822c000; 3339 bfd_put_16 (output_bfd, 0x0700, 3340 contents + rel->r_offset + 4); 3341 } 3342 } 3343 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 3344 } 3345 else if (r_type == R_390_TLS_LDCALL) 3346 { 3347 if (!bfd_link_pic (info)) 3348 { 3349 unsigned int insn; 3350 3351 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 3352 if ((insn & 0xff000fff) != 0x4d000000 && 3353 (insn & 0xffff0000) != 0xc0e50000 && 3354 (insn & 0xff000000) != 0x0d000000) 3355 invalid_tls_insn (input_bfd, input_section, rel); 3356 3357 if ((insn & 0xff000000) == 0x0d000000) 3358 { 3359 /* LD->LE transition. 3360 basr rx, ry -> nopr r7 */ 3361 insn = 0x07070000 | (insn & 0xffff); 3362 } 3363 else if ((insn & 0xff000000) == 0x4d000000) 3364 { 3365 /* LD->LE transition. 3366 bas %r14,0(%rx,%r13) -> bc 0,0 */ 3367 insn = 0x47000000; 3368 } 3369 else 3370 { 3371 /* LD->LE transition. 3372 brasl %r14,__tls_get_offset@plt -> brcl 0,. */ 3373 insn = 0xc0040000; 3374 bfd_put_16 (output_bfd, 0x0000, 3375 contents + rel->r_offset + 4); 3376 } 3377 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 3378 } 3379 } 3380 continue; 3381 3382 default: 3383 break; 3384 } 3385 3386 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections 3387 because such sections are not SEC_ALLOC and thus ld.so will 3388 not process them. */ 3389 if (unresolved_reloc 3390 && !((input_section->flags & SEC_DEBUGGING) != 0 3391 && h->def_dynamic) 3392 && _bfd_elf_section_offset (output_bfd, info, input_section, 3393 rel->r_offset) != (bfd_vma) -1) 3394 (*_bfd_error_handler) 3395 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), 3396 input_bfd, 3397 input_section, 3398 (long) rel->r_offset, 3399 howto->name, 3400 h->root.root.string); 3401 3402 do_relocation: 3403 3404 /* When applying a 24 bit reloc we need to start one byte 3405 earlier. Otherwise the 32 bit get/put bfd operations might 3406 access a byte after the actual section. */ 3407 if (r_type == R_390_PC24DBL 3408 || r_type == R_390_PLT24DBL) 3409 rel->r_offset--; 3410 3411 if (r_type == R_390_20 3412 || r_type == R_390_GOT20 3413 || r_type == R_390_GOTPLT20 3414 || r_type == R_390_TLS_GOTIE20) 3415 { 3416 relocation += rel->r_addend; 3417 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; 3418 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3419 contents, rel->r_offset, 3420 relocation, 0); 3421 } 3422 else 3423 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3424 contents, rel->r_offset, 3425 relocation, rel->r_addend); 3426 3427 if (r != bfd_reloc_ok) 3428 { 3429 const char *name; 3430 3431 if (h != NULL) 3432 name = h->root.root.string; 3433 else 3434 { 3435 name = bfd_elf_string_from_elf_section (input_bfd, 3436 symtab_hdr->sh_link, 3437 sym->st_name); 3438 if (name == NULL) 3439 return FALSE; 3440 if (*name == '\0') 3441 name = bfd_section_name (input_bfd, sec); 3442 } 3443 3444 if (r == bfd_reloc_overflow) 3445 (*info->callbacks->reloc_overflow) 3446 (info, (h ? &h->root : NULL), name, howto->name, 3447 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 3448 else 3449 { 3450 (*_bfd_error_handler) 3451 (_("%B(%A+0x%lx): reloc against `%s': error %d"), 3452 input_bfd, input_section, 3453 (long) rel->r_offset, name, (int) r); 3454 return FALSE; 3455 } 3456 } 3457 } 3458 3459 return TRUE; 3460 } 3461 3462 /* Generate the PLT slots together with the dynamic relocations needed 3463 for IFUNC symbols. */ 3464 3465 static void 3466 elf_s390_finish_ifunc_symbol (bfd *output_bfd, 3467 struct bfd_link_info *info, 3468 struct elf_link_hash_entry *h, 3469 struct elf_s390_link_hash_table *htab, 3470 bfd_vma iplt_offset, 3471 bfd_vma resolver_address) 3472 { 3473 bfd_vma iplt_index; 3474 bfd_vma got_offset; 3475 bfd_vma igotiplt_offset; 3476 Elf_Internal_Rela rela; 3477 bfd_byte *loc; 3478 asection *plt, *gotplt, *relplt; 3479 bfd_vma relative_offset; 3480 3481 if (htab->elf.iplt == NULL 3482 || htab->elf.igotplt == NULL 3483 || htab->elf.irelplt == NULL) 3484 abort (); 3485 3486 gotplt = htab->elf.igotplt; 3487 relplt = htab->elf.irelplt; 3488 3489 /* Index of the PLT slot within iplt section. */ 3490 iplt_index = iplt_offset / PLT_ENTRY_SIZE; 3491 plt = htab->elf.iplt; 3492 /* Offset into the igot.plt section. */ 3493 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE; 3494 /* Offset into the got section. */ 3495 got_offset = igotiplt_offset + gotplt->output_offset; 3496 3497 /* S390 uses halfwords for relative branch calc! */ 3498 relative_offset = - (plt->output_offset + 3499 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2; 3500 /* If offset is > 32768, branch to a previous branch 3501 390 can only handle +-64 K jumps. */ 3502 if ( -32768 > (int) relative_offset ) 3503 relative_offset 3504 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2); 3505 3506 /* Fill in the entry in the procedure linkage table. */ 3507 if (!bfd_link_pic (info)) 3508 { 3509 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry, 3510 PLT_ENTRY_SIZE); 3511 3512 /* Adjust jump to the first plt entry. */ 3513 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3514 plt->contents + iplt_offset + 20); 3515 3516 /* Push the GOT offset field. */ 3517 bfd_put_32 (output_bfd, 3518 (gotplt->output_section->vma 3519 + got_offset), 3520 plt->contents + iplt_offset + 24); 3521 } 3522 else if (got_offset < 4096) 3523 { 3524 /* The GOT offset is small enough to be used directly as 3525 displacement. */ 3526 memcpy (plt->contents + iplt_offset, 3527 elf_s390_plt_pic12_entry, 3528 PLT_ENTRY_SIZE); 3529 3530 /* Put in the GOT offset as displacement value. The 0xc000 3531 value comes from the first word of the plt entry. Look 3532 at the elf_s390_plt_pic16_entry content. */ 3533 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset, 3534 plt->contents + iplt_offset + 2); 3535 3536 /* Adjust the jump to the first plt entry. */ 3537 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3538 plt->contents + iplt_offset + 20); 3539 } 3540 else if (got_offset < 32768) 3541 { 3542 /* The GOT offset is too big for a displacement but small 3543 enough to be a signed 16 bit immediate value as it can be 3544 used in an lhi instruction. */ 3545 memcpy (plt->contents + iplt_offset, 3546 elf_s390_plt_pic16_entry, 3547 PLT_ENTRY_SIZE); 3548 3549 /* Put in the GOT offset for the lhi instruction. */ 3550 bfd_put_16 (output_bfd, (bfd_vma)got_offset, 3551 plt->contents + iplt_offset + 2); 3552 3553 /* Adjust the jump to the first plt entry. */ 3554 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3555 plt->contents + iplt_offset + 20); 3556 } 3557 else 3558 { 3559 memcpy (plt->contents + iplt_offset, 3560 elf_s390_plt_pic_entry, 3561 PLT_ENTRY_SIZE); 3562 3563 /* Adjust the jump to the first plt entry. */ 3564 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3565 plt->contents + iplt_offset + 20); 3566 3567 /* Push the GOT offset field. */ 3568 bfd_put_32 (output_bfd, got_offset, 3569 plt->contents + iplt_offset + 24); 3570 } 3571 /* Insert offset into reloc. table here. */ 3572 bfd_put_32 (output_bfd, relplt->output_offset + 3573 iplt_index * RELA_ENTRY_SIZE, 3574 plt->contents + iplt_offset + 28); 3575 3576 /* Fill in the entry in the global offset table. 3577 Points to instruction after GOT offset. */ 3578 bfd_put_32 (output_bfd, 3579 (plt->output_section->vma 3580 + plt->output_offset 3581 + iplt_offset 3582 + 12), 3583 gotplt->contents + igotiplt_offset); 3584 3585 /* Fill in the entry in the .rela.plt section. */ 3586 rela.r_offset = gotplt->output_section->vma + got_offset; 3587 3588 if (!h 3589 || h->dynindx == -1 3590 || ((bfd_link_executable (info) 3591 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 3592 && h->def_regular)) 3593 { 3594 /* The symbol can be locally resolved. */ 3595 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE); 3596 rela.r_addend = resolver_address; 3597 } 3598 else 3599 { 3600 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT); 3601 rela.r_addend = 0; 3602 } 3603 3604 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE; 3605 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3606 } 3607 3608 /* Finish up dynamic symbol handling. We set the contents of various 3609 dynamic sections here. */ 3610 3611 static bfd_boolean 3612 elf_s390_finish_dynamic_symbol (bfd *output_bfd, 3613 struct bfd_link_info *info, 3614 struct elf_link_hash_entry *h, 3615 Elf_Internal_Sym *sym) 3616 { 3617 struct elf_s390_link_hash_table *htab; 3618 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h; 3619 3620 htab = elf_s390_hash_table (info); 3621 3622 if (h->plt.offset != (bfd_vma) -1) 3623 { 3624 bfd_vma plt_index; 3625 bfd_vma got_offset; 3626 Elf_Internal_Rela rela; 3627 bfd_byte *loc; 3628 bfd_vma relative_offset; 3629 3630 /* This symbol has an entry in the procedure linkage table. Set 3631 it up. */ 3632 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 3633 { 3634 elf_s390_finish_ifunc_symbol (output_bfd, info, h, 3635 htab, h->plt.offset, 3636 eh->ifunc_resolver_address + 3637 eh->ifunc_resolver_section->output_offset + 3638 eh->ifunc_resolver_section->output_section->vma); 3639 /* Do not return yet. Handling of explicit GOT slots of 3640 IFUNC symbols is below. */ 3641 } 3642 else 3643 { 3644 if (h->dynindx == -1 3645 || htab->elf.splt == NULL 3646 || htab->elf.sgotplt == NULL 3647 || htab->elf.srelplt == NULL) 3648 abort (); 3649 3650 /* Calc. index no. 3651 Current offset - size first entry / entry size. */ 3652 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; 3653 3654 /* Offset in GOT is PLT index plus GOT headers(3) times 4, 3655 addr & GOT addr. */ 3656 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; 3657 3658 /* S390 uses halfwords for relative branch calc! */ 3659 relative_offset = - ((PLT_FIRST_ENTRY_SIZE + 3660 (PLT_ENTRY_SIZE * plt_index) + 18) / 2); 3661 /* If offset is > 32768, branch to a previous branch 3662 390 can only handle +-64 K jumps. */ 3663 if ( -32768 > (int) relative_offset ) 3664 relative_offset 3665 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2); 3666 3667 /* Fill in the entry in the procedure linkage table. */ 3668 if (!bfd_link_pic (info)) 3669 { 3670 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry, 3671 PLT_ENTRY_SIZE); 3672 3673 /* Adjust jump to the first plt entry. */ 3674 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3675 htab->elf.splt->contents + h->plt.offset + 20); 3676 3677 /* Push the GOT offset field. */ 3678 bfd_put_32 (output_bfd, 3679 (htab->elf.sgotplt->output_section->vma 3680 + htab->elf.sgotplt->output_offset 3681 + got_offset), 3682 htab->elf.splt->contents + h->plt.offset + 24); 3683 } 3684 else if (got_offset < 4096) 3685 { 3686 /* The GOT offset is small enough to be used directly as 3687 displacement. */ 3688 memcpy (htab->elf.splt->contents + h->plt.offset, 3689 elf_s390_plt_pic12_entry, 3690 PLT_ENTRY_SIZE); 3691 3692 /* Put in the GOT offset as displacement value. The 0xc000 3693 value comes from the first word of the plt entry. Look 3694 at the elf_s390_plt_pic12_entry content. */ 3695 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset, 3696 htab->elf.splt->contents + h->plt.offset + 2); 3697 3698 /* Adjust the jump to the first plt entry. */ 3699 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3700 htab->elf.splt->contents + h->plt.offset + 20); 3701 } 3702 else if (got_offset < 32768) 3703 { 3704 /* The GOT offset is too big for a displacement but small 3705 enough to be a signed 16 bit immediate value as it can be 3706 used in an lhi instruction. */ 3707 memcpy (htab->elf.splt->contents + h->plt.offset, 3708 elf_s390_plt_pic16_entry, 3709 PLT_ENTRY_SIZE); 3710 3711 /* Put in the GOT offset for the lhi instruction. */ 3712 bfd_put_16 (output_bfd, (bfd_vma)got_offset, 3713 htab->elf.splt->contents + h->plt.offset + 2); 3714 3715 /* Adjust the jump to the first plt entry. */ 3716 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3717 htab->elf.splt->contents + h->plt.offset + 20); 3718 } 3719 else 3720 { 3721 memcpy (htab->elf.splt->contents + h->plt.offset, 3722 elf_s390_plt_pic_entry, 3723 PLT_ENTRY_SIZE); 3724 3725 /* Adjust the jump to the first plt entry. */ 3726 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), 3727 htab->elf.splt->contents + h->plt.offset + 20); 3728 3729 /* Push the GOT offset field. */ 3730 bfd_put_32 (output_bfd, got_offset, 3731 htab->elf.splt->contents + h->plt.offset + 24); 3732 } 3733 /* Insert offset into reloc. table here. */ 3734 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), 3735 htab->elf.splt->contents + h->plt.offset + 28); 3736 3737 /* Fill in the entry in the global offset table. 3738 Points to instruction after GOT offset. */ 3739 bfd_put_32 (output_bfd, 3740 (htab->elf.splt->output_section->vma 3741 + htab->elf.splt->output_offset 3742 + h->plt.offset 3743 + 12), 3744 htab->elf.sgotplt->contents + got_offset); 3745 3746 /* Fill in the entry in the .rela.plt section. */ 3747 rela.r_offset = (htab->elf.sgotplt->output_section->vma 3748 + htab->elf.sgotplt->output_offset 3749 + got_offset); 3750 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT); 3751 rela.r_addend = 0; 3752 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela); 3753 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3754 3755 if (!h->def_regular) 3756 { 3757 /* Mark the symbol as undefined, rather than as defined in 3758 the .plt section. Leave the value alone. This is a clue 3759 for the dynamic linker, to make function pointer 3760 comparisons work between an application and shared 3761 library. */ 3762 sym->st_shndx = SHN_UNDEF; 3763 } 3764 } 3765 } 3766 3767 if (h->got.offset != (bfd_vma) -1 3768 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD 3769 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE 3770 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) 3771 { 3772 Elf_Internal_Rela rela; 3773 bfd_byte *loc; 3774 3775 /* This symbol has an entry in the global offset table. Set it 3776 up. */ 3777 3778 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) 3779 abort (); 3780 3781 rela.r_offset = (htab->elf.sgot->output_section->vma 3782 + htab->elf.sgot->output_offset 3783 + (h->got.offset &~ (bfd_vma) 1)); 3784 3785 /* If this is a static link, or it is a -Bsymbolic link and the 3786 symbol is defined locally or was forced to be local because 3787 of a version file, we just want to emit a RELATIVE reloc. 3788 The entry in the global offset table will already have been 3789 initialized in the relocate_section function. */ 3790 if (h->def_regular && s390_is_ifunc_symbol_p (h)) 3791 { 3792 if (bfd_link_pic (info)) 3793 { 3794 /* An explicit GOT slot usage needs GLOB_DAT. If the 3795 symbol references local the implicit got.iplt slot 3796 will be used and the IRELATIVE reloc has been created 3797 above. */ 3798 goto do_glob_dat; 3799 } 3800 else 3801 { 3802 /* For non-shared objects explicit GOT slots must be 3803 filled with the PLT slot address for pointer 3804 equality reasons. */ 3805 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma 3806 + htab->elf.iplt->output_offset 3807 + h->plt.offset), 3808 htab->elf.sgot->contents + h->got.offset); 3809 return TRUE; 3810 } 3811 } 3812 else if (bfd_link_pic (info) 3813 && SYMBOL_REFERENCES_LOCAL (info, h)) 3814 { 3815 /* If this is a static link, or it is a -Bsymbolic link and 3816 the symbol is defined locally or was forced to be local 3817 because of a version file, we just want to emit a 3818 RELATIVE reloc. The entry in the global offset table 3819 will already have been initialized in the 3820 relocate_section function. */ 3821 if (!h->def_regular) 3822 return FALSE; 3823 BFD_ASSERT((h->got.offset & 1) != 0); 3824 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE); 3825 rela.r_addend = (h->root.u.def.value 3826 + h->root.u.def.section->output_section->vma 3827 + h->root.u.def.section->output_offset); 3828 } 3829 else 3830 { 3831 BFD_ASSERT((h->got.offset & 1) == 0); 3832 do_glob_dat: 3833 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset); 3834 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT); 3835 rela.r_addend = 0; 3836 } 3837 3838 loc = htab->elf.srelgot->contents; 3839 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 3840 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3841 } 3842 3843 if (h->needs_copy) 3844 { 3845 Elf_Internal_Rela rela; 3846 bfd_byte *loc; 3847 3848 /* This symbols needs a copy reloc. Set it up. */ 3849 3850 if (h->dynindx == -1 3851 || (h->root.type != bfd_link_hash_defined 3852 && h->root.type != bfd_link_hash_defweak) 3853 || htab->srelbss == NULL) 3854 abort (); 3855 3856 rela.r_offset = (h->root.u.def.value 3857 + h->root.u.def.section->output_section->vma 3858 + h->root.u.def.section->output_offset); 3859 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY); 3860 rela.r_addend = 0; 3861 loc = htab->srelbss->contents; 3862 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela); 3863 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3864 } 3865 3866 /* Mark some specially defined symbols as absolute. */ 3867 if (h == htab->elf.hdynamic 3868 || h == htab->elf.hgot 3869 || h == htab->elf.hplt) 3870 sym->st_shndx = SHN_ABS; 3871 3872 return TRUE; 3873 } 3874 3875 /* Used to decide how to sort relocs in an optimal manner for the 3876 dynamic linker, before writing them out. */ 3877 3878 static enum elf_reloc_type_class 3879 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 3880 const asection *rel_sec ATTRIBUTE_UNUSED, 3881 const Elf_Internal_Rela *rela) 3882 { 3883 bfd *abfd = info->output_bfd; 3884 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 3885 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info); 3886 unsigned long r_symndx = ELF32_R_SYM (rela->r_info); 3887 Elf_Internal_Sym sym; 3888 3889 if (htab->elf.dynsym == NULL 3890 || !bed->s->swap_symbol_in (abfd, 3891 (htab->elf.dynsym->contents 3892 + r_symndx * bed->s->sizeof_sym), 3893 0, &sym)) 3894 abort (); 3895 3896 /* Check relocation against STT_GNU_IFUNC symbol. */ 3897 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) 3898 return reloc_class_ifunc; 3899 3900 switch ((int) ELF32_R_TYPE (rela->r_info)) 3901 { 3902 case R_390_RELATIVE: 3903 return reloc_class_relative; 3904 case R_390_JMP_SLOT: 3905 return reloc_class_plt; 3906 case R_390_COPY: 3907 return reloc_class_copy; 3908 default: 3909 return reloc_class_normal; 3910 } 3911 } 3912 3913 /* Finish up the dynamic sections. */ 3914 3915 static bfd_boolean 3916 elf_s390_finish_dynamic_sections (bfd *output_bfd, 3917 struct bfd_link_info *info) 3918 { 3919 struct elf_s390_link_hash_table *htab; 3920 bfd *dynobj; 3921 asection *sdyn; 3922 bfd *ibfd; 3923 unsigned int i; 3924 3925 htab = elf_s390_hash_table (info); 3926 dynobj = htab->elf.dynobj; 3927 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 3928 3929 if (htab->elf.dynamic_sections_created) 3930 { 3931 Elf32_External_Dyn *dyncon, *dynconend; 3932 3933 if (sdyn == NULL || htab->elf.sgot == NULL) 3934 abort (); 3935 3936 dyncon = (Elf32_External_Dyn *) sdyn->contents; 3937 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 3938 for (; dyncon < dynconend; dyncon++) 3939 { 3940 Elf_Internal_Dyn dyn; 3941 asection *s; 3942 3943 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 3944 3945 switch (dyn.d_tag) 3946 { 3947 default: 3948 continue; 3949 3950 case DT_PLTGOT: 3951 s = htab->elf.sgotplt; 3952 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 3953 break; 3954 3955 case DT_JMPREL: 3956 s = htab->elf.srelplt; 3957 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 3958 break; 3959 3960 case DT_PLTRELSZ: 3961 dyn.d_un.d_val = htab->elf.srelplt->size + htab->elf.irelplt->size; 3962 break; 3963 } 3964 3965 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3966 } 3967 3968 /* Fill in the special first entry in the procedure linkage table. */ 3969 if (htab->elf.splt && htab->elf.splt->size > 0) 3970 { 3971 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE); 3972 if (bfd_link_pic (info)) 3973 { 3974 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry, 3975 PLT_FIRST_ENTRY_SIZE); 3976 } 3977 else 3978 { 3979 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry, 3980 PLT_FIRST_ENTRY_SIZE); 3981 bfd_put_32 (output_bfd, 3982 htab->elf.sgotplt->output_section->vma 3983 + htab->elf.sgotplt->output_offset, 3984 htab->elf.splt->contents + 24); 3985 } 3986 elf_section_data (htab->elf.splt->output_section) 3987 ->this_hdr.sh_entsize = 4; 3988 } 3989 3990 } 3991 3992 if (htab->elf.sgotplt) 3993 { 3994 /* Fill in the first three entries in the global offset table. */ 3995 if (htab->elf.sgotplt->size > 0) 3996 { 3997 bfd_put_32 (output_bfd, 3998 (sdyn == NULL ? (bfd_vma) 0 3999 : sdyn->output_section->vma + sdyn->output_offset), 4000 htab->elf.sgotplt->contents); 4001 /* One entry for shared object struct ptr. */ 4002 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4); 4003 /* One entry for _dl_runtime_resolve. */ 4004 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8); 4005 } 4006 4007 elf_section_data (htab->elf.sgotplt->output_section) 4008 ->this_hdr.sh_entsize = 4; 4009 } 4010 /* Finish dynamic symbol for local IFUNC symbols. */ 4011 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 4012 { 4013 struct plt_entry *local_plt; 4014 Elf_Internal_Sym *isym; 4015 Elf_Internal_Shdr *symtab_hdr; 4016 4017 symtab_hdr = &elf_symtab_hdr (ibfd); 4018 4019 local_plt = elf_s390_local_plt (ibfd); 4020 if (local_plt != NULL) 4021 for (i = 0; i < symtab_hdr->sh_info; i++) 4022 { 4023 if (local_plt[i].plt.offset != (bfd_vma) -1) 4024 { 4025 asection *sec = local_plt[i].sec; 4026 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i); 4027 if (isym == NULL) 4028 return FALSE; 4029 4030 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 4031 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab, 4032 local_plt[i].plt.offset, 4033 isym->st_value 4034 + sec->output_section->vma 4035 + sec->output_offset); 4036 4037 } 4038 } 4039 } 4040 return TRUE; 4041 } 4042 4043 static bfd_boolean 4044 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note) 4045 { 4046 int offset; 4047 unsigned int size; 4048 4049 switch (note->descsz) 4050 { 4051 default: 4052 return FALSE; 4053 4054 case 224: /* S/390 Linux. */ 4055 /* pr_cursig */ 4056 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 4057 4058 /* pr_pid */ 4059 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); 4060 4061 /* pr_reg */ 4062 offset = 72; 4063 size = 144; 4064 break; 4065 } 4066 4067 /* Make a ".reg/999" section. */ 4068 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 4069 size, note->descpos + offset); 4070 } 4071 4072 /* Return address for Ith PLT stub in section PLT, for relocation REL 4073 or (bfd_vma) -1 if it should not be included. */ 4074 4075 static bfd_vma 4076 elf_s390_plt_sym_val (bfd_vma i, const asection *plt, 4077 const arelent *rel ATTRIBUTE_UNUSED) 4078 { 4079 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; 4080 } 4081 4082 /* Merge backend specific data from an object file to the output 4083 object file when linking. */ 4084 4085 static bfd_boolean 4086 elf32_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 4087 { 4088 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd)) 4089 return TRUE; 4090 4091 if (!elf_s390_merge_obj_attributes (ibfd, obfd)) 4092 return FALSE; 4093 4094 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags; 4095 return TRUE; 4096 } 4097 4098 4099 #define TARGET_BIG_SYM s390_elf32_vec 4100 #define TARGET_BIG_NAME "elf32-s390" 4101 #define ELF_ARCH bfd_arch_s390 4102 #define ELF_TARGET_ID S390_ELF_DATA 4103 #define ELF_MACHINE_CODE EM_S390 4104 #define ELF_MACHINE_ALT1 EM_S390_OLD 4105 #define ELF_MAXPAGESIZE 0x1000 4106 4107 #define elf_backend_can_gc_sections 1 4108 #define elf_backend_can_refcount 1 4109 #define elf_backend_want_got_plt 1 4110 #define elf_backend_plt_readonly 1 4111 #define elf_backend_want_plt_sym 0 4112 #define elf_backend_got_header_size 12 4113 #define elf_backend_rela_normal 1 4114 4115 #define elf_info_to_howto elf_s390_info_to_howto 4116 4117 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name 4118 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create 4119 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup 4120 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup 4121 4122 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data 4123 4124 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol 4125 #define elf_backend_check_relocs elf_s390_check_relocs 4126 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol 4127 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections 4128 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections 4129 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol 4130 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook 4131 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook 4132 #define elf_backend_reloc_type_class elf_s390_reloc_type_class 4133 #define elf_backend_relocate_section elf_s390_relocate_section 4134 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections 4135 #define elf_backend_init_index_section _bfd_elf_init_1_index_section 4136 #define elf_backend_grok_prstatus elf_s390_grok_prstatus 4137 #define elf_backend_plt_sym_val elf_s390_plt_sym_val 4138 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook 4139 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p 4140 4141 #define bfd_elf32_mkobject elf_s390_mkobject 4142 #define elf_backend_object_p elf_s390_object_p 4143 4144 #include "elf32-target.h" 4145
Indexes created Sat Apr 18 00:22:28 UTC 2026