1/* IBM S/390-specific support for 64-bit ELF 2 Copyright (C) 2000-2022 Free Software Foundation, Inc. 3 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com). 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 20 02110-1301, USA. */ 21 22#include "sysdep.h" 23#include "bfd.h" 24#include "bfdlink.h" 25#include "libbfd.h" 26#include "elf-bfd.h" 27#include "elf/s390.h" 28#include "elf-s390.h" 29#include <stdarg.h> 30 31/* In case we're on a 32-bit machine, construct a 64-bit "-1" value 32 from smaller values. Start with zero, widen, *then* decrement. */ 33#define MINUS_ONE (((bfd_vma)0) - 1) 34 35static bfd_reloc_status_type 36s390_tls_reloc (bfd *, arelent *, asymbol *, void *, 37 asection *, bfd *, char **); 38static bfd_reloc_status_type 39s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *, 40 asection *, bfd *, char **); 41 42/* The relocation "howto" table. */ 43static reloc_howto_type elf_howto_table[] = 44{ 45 HOWTO (R_390_NONE, /* type */ 46 0, /* rightshift */ 47 0, /* size */ 48 0, /* bitsize */ 49 false, /* pc_relative */ 50 0, /* bitpos */ 51 complain_overflow_dont, /* complain_on_overflow */ 52 bfd_elf_generic_reloc, /* special_function */ 53 "R_390_NONE", /* name */ 54 false, /* partial_inplace */ 55 0, /* src_mask */ 56 0, /* dst_mask */ 57 false), /* pcrel_offset */ 58 59 HOWTO(R_390_8, 0, 1, 8, false, 0, complain_overflow_bitfield, 60 bfd_elf_generic_reloc, "R_390_8", false, 0,0x000000ff, false), 61 HOWTO(R_390_12, 0, 2, 12, false, 0, complain_overflow_dont, 62 bfd_elf_generic_reloc, "R_390_12", false, 0,0x00000fff, false), 63 HOWTO(R_390_16, 0, 2, 16, false, 0, complain_overflow_bitfield, 64 bfd_elf_generic_reloc, "R_390_16", false, 0,0x0000ffff, false), 65 HOWTO(R_390_32, 0, 4, 32, false, 0, complain_overflow_bitfield, 66 bfd_elf_generic_reloc, "R_390_32", false, 0,0xffffffff, false), 67 HOWTO(R_390_PC32, 0, 4, 32, true, 0, complain_overflow_bitfield, 68 bfd_elf_generic_reloc, "R_390_PC32", false, 0,0xffffffff, true), 69 HOWTO(R_390_GOT12, 0, 2, 12, false, 0, complain_overflow_bitfield, 70 bfd_elf_generic_reloc, "R_390_GOT12", false, 0,0x00000fff, false), 71 HOWTO(R_390_GOT32, 0, 4, 32, false, 0, complain_overflow_bitfield, 72 bfd_elf_generic_reloc, "R_390_GOT32", false, 0,0xffffffff, false), 73 HOWTO(R_390_PLT32, 0, 4, 32, true, 0, complain_overflow_bitfield, 74 bfd_elf_generic_reloc, "R_390_PLT32", false, 0,0xffffffff, true), 75 HOWTO(R_390_COPY, 0, 8, 64, false, 0, complain_overflow_bitfield, 76 bfd_elf_generic_reloc, "R_390_COPY", false, 0,MINUS_ONE, false), 77 HOWTO(R_390_GLOB_DAT, 0, 8, 64, false, 0, complain_overflow_bitfield, 78 bfd_elf_generic_reloc, "R_390_GLOB_DAT", false, 0,MINUS_ONE, false), 79 HOWTO(R_390_JMP_SLOT, 0, 8, 64, false, 0, complain_overflow_bitfield, 80 bfd_elf_generic_reloc, "R_390_JMP_SLOT", false, 0,MINUS_ONE, false), 81 HOWTO(R_390_RELATIVE, 0, 8, 64, true, 0, complain_overflow_bitfield, 82 bfd_elf_generic_reloc, "R_390_RELATIVE", false, 0,MINUS_ONE, false), 83 HOWTO(R_390_GOTOFF32, 0, 4, 32, false, 0, complain_overflow_bitfield, 84 bfd_elf_generic_reloc, "R_390_GOTOFF32", false, 0,MINUS_ONE, false), 85 HOWTO(R_390_GOTPC, 0, 8, 64, true, 0, complain_overflow_bitfield, 86 bfd_elf_generic_reloc, "R_390_GOTPC", false, 0,MINUS_ONE, true), 87 HOWTO(R_390_GOT16, 0, 2, 16, false, 0, complain_overflow_bitfield, 88 bfd_elf_generic_reloc, "R_390_GOT16", false, 0,0x0000ffff, false), 89 HOWTO(R_390_PC16, 0, 2, 16, true, 0, complain_overflow_bitfield, 90 bfd_elf_generic_reloc, "R_390_PC16", false, 0,0x0000ffff, true), 91 HOWTO(R_390_PC16DBL, 1, 2, 16, true, 0, complain_overflow_bitfield, 92 bfd_elf_generic_reloc, "R_390_PC16DBL", false, 0,0x0000ffff, true), 93 HOWTO(R_390_PLT16DBL, 1, 2, 16, true, 0, complain_overflow_bitfield, 94 bfd_elf_generic_reloc, "R_390_PLT16DBL", false, 0,0x0000ffff, true), 95 HOWTO(R_390_PC32DBL, 1, 4, 32, true, 0, complain_overflow_bitfield, 96 bfd_elf_generic_reloc, "R_390_PC32DBL", false, 0,0xffffffff, true), 97 HOWTO(R_390_PLT32DBL, 1, 4, 32, true, 0, complain_overflow_bitfield, 98 bfd_elf_generic_reloc, "R_390_PLT32DBL", false, 0,0xffffffff, true), 99 HOWTO(R_390_GOTPCDBL, 1, 4, 32, true, 0, complain_overflow_bitfield, 100 bfd_elf_generic_reloc, "R_390_GOTPCDBL", false, 0,MINUS_ONE, true), 101 HOWTO(R_390_64, 0, 8, 64, false, 0, complain_overflow_bitfield, 102 bfd_elf_generic_reloc, "R_390_64", false, 0,MINUS_ONE, false), 103 HOWTO(R_390_PC64, 0, 8, 64, true, 0, complain_overflow_bitfield, 104 bfd_elf_generic_reloc, "R_390_PC64", false, 0,MINUS_ONE, true), 105 HOWTO(R_390_GOT64, 0, 8, 64, false, 0, complain_overflow_bitfield, 106 bfd_elf_generic_reloc, "R_390_GOT64", false, 0,MINUS_ONE, false), 107 HOWTO(R_390_PLT64, 0, 8, 64, true, 0, complain_overflow_bitfield, 108 bfd_elf_generic_reloc, "R_390_PLT64", false, 0,MINUS_ONE, true), 109 HOWTO(R_390_GOTENT, 1, 4, 32, true, 0, complain_overflow_bitfield, 110 bfd_elf_generic_reloc, "R_390_GOTENT", false, 0,MINUS_ONE, true), 111 HOWTO(R_390_GOTOFF16, 0, 2, 16, false, 0, complain_overflow_bitfield, 112 bfd_elf_generic_reloc, "R_390_GOTOFF16", false, 0,0x0000ffff, false), 113 HOWTO(R_390_GOTOFF64, 0, 8, 64, false, 0, complain_overflow_bitfield, 114 bfd_elf_generic_reloc, "R_390_GOTOFF64", false, 0,MINUS_ONE, false), 115 HOWTO(R_390_GOTPLT12, 0, 2, 12, false, 0, complain_overflow_dont, 116 bfd_elf_generic_reloc, "R_390_GOTPLT12", false, 0,0x00000fff, false), 117 HOWTO(R_390_GOTPLT16, 0, 2, 16, false, 0, complain_overflow_bitfield, 118 bfd_elf_generic_reloc, "R_390_GOTPLT16", false, 0,0x0000ffff, false), 119 HOWTO(R_390_GOTPLT32, 0, 4, 32, false, 0, complain_overflow_bitfield, 120 bfd_elf_generic_reloc, "R_390_GOTPLT32", false, 0,0xffffffff, false), 121 HOWTO(R_390_GOTPLT64, 0, 8, 64, false, 0, complain_overflow_bitfield, 122 bfd_elf_generic_reloc, "R_390_GOTPLT64", false, 0,MINUS_ONE, false), 123 HOWTO(R_390_GOTPLTENT, 1, 4, 32, true, 0, complain_overflow_bitfield, 124 bfd_elf_generic_reloc, "R_390_GOTPLTENT",false, 0,MINUS_ONE, true), 125 HOWTO(R_390_PLTOFF16, 0, 2, 16, false, 0, complain_overflow_bitfield, 126 bfd_elf_generic_reloc, "R_390_PLTOFF16", false, 0,0x0000ffff, false), 127 HOWTO(R_390_PLTOFF32, 0, 4, 32, false, 0, complain_overflow_bitfield, 128 bfd_elf_generic_reloc, "R_390_PLTOFF32", false, 0,0xffffffff, false), 129 HOWTO(R_390_PLTOFF64, 0, 8, 64, false, 0, complain_overflow_bitfield, 130 bfd_elf_generic_reloc, "R_390_PLTOFF64", false, 0,MINUS_ONE, false), 131 HOWTO(R_390_TLS_LOAD, 0, 0, 0, false, 0, complain_overflow_dont, 132 s390_tls_reloc, "R_390_TLS_LOAD", false, 0, 0, false), 133 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, false, 0, complain_overflow_dont, 134 s390_tls_reloc, "R_390_TLS_GDCALL", false, 0, 0, false), 135 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, false, 0, complain_overflow_dont, 136 s390_tls_reloc, "R_390_TLS_LDCALL", false, 0, 0, false), 137 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */ 138 HOWTO(R_390_TLS_GD64, 0, 8, 64, false, 0, complain_overflow_bitfield, 139 bfd_elf_generic_reloc, "R_390_TLS_GD64", false, 0, MINUS_ONE, false), 140 HOWTO(R_390_TLS_GOTIE12, 0, 2, 12, false, 0, complain_overflow_dont, 141 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", false, 0, 0x00000fff, false), 142 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */ 143 HOWTO(R_390_TLS_GOTIE64, 0, 8, 64, false, 0, complain_overflow_bitfield, 144 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", false, 0, MINUS_ONE, false), 145 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */ 146 HOWTO(R_390_TLS_LDM64, 0, 8, 64, false, 0, complain_overflow_bitfield, 147 bfd_elf_generic_reloc, "R_390_TLS_LDM64", false, 0, MINUS_ONE, false), 148 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */ 149 HOWTO(R_390_TLS_IE64, 0, 8, 64, false, 0, complain_overflow_bitfield, 150 bfd_elf_generic_reloc, "R_390_TLS_IE64", false, 0, MINUS_ONE, false), 151 HOWTO(R_390_TLS_IEENT, 1, 4, 32, true, 0, complain_overflow_bitfield, 152 bfd_elf_generic_reloc, "R_390_TLS_IEENT", false, 0, MINUS_ONE, true), 153 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */ 154 HOWTO(R_390_TLS_LE64, 0, 4, 32, false, 0, complain_overflow_bitfield, 155 bfd_elf_generic_reloc, "R_390_TLS_LE64", false, 0, MINUS_ONE, false), 156 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */ 157 HOWTO(R_390_TLS_LDO64, 0, 8, 64, false, 0, complain_overflow_bitfield, 158 bfd_elf_generic_reloc, "R_390_TLS_LDO64", false, 0, MINUS_ONE, false), 159 HOWTO(R_390_TLS_DTPMOD, 0, 8, 64, false, 0, complain_overflow_bitfield, 160 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", false, 0, MINUS_ONE, false), 161 HOWTO(R_390_TLS_DTPOFF, 0, 8, 64, false, 0, complain_overflow_bitfield, 162 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", false, 0, MINUS_ONE, false), 163 HOWTO(R_390_TLS_TPOFF, 0, 8, 64, false, 0, complain_overflow_bitfield, 164 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", false, 0, MINUS_ONE, false), 165 HOWTO(R_390_20, 0, 4, 20, false, 8, complain_overflow_dont, 166 s390_elf_ldisp_reloc, "R_390_20", false, 0,0x0fffff00, false), 167 HOWTO(R_390_GOT20, 0, 4, 20, false, 8, complain_overflow_dont, 168 s390_elf_ldisp_reloc, "R_390_GOT20", false, 0,0x0fffff00, false), 169 HOWTO(R_390_GOTPLT20, 0, 4, 20, false, 8, complain_overflow_dont, 170 s390_elf_ldisp_reloc, "R_390_GOTPLT20", false, 0,0x0fffff00, false), 171 HOWTO(R_390_TLS_GOTIE20, 0, 4, 20, false, 8, complain_overflow_dont, 172 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", false, 0,0x0fffff00, false), 173 HOWTO(R_390_IRELATIVE, 0, 8, 64, false, 0, complain_overflow_bitfield, 174 bfd_elf_generic_reloc, "R_390_IRELATIVE", false, 0, MINUS_ONE, false), 175 HOWTO(R_390_PC12DBL, 1, 2, 12, true, 0, complain_overflow_bitfield, 176 bfd_elf_generic_reloc, "R_390_PC12DBL", false, 0,0x00000fff, true), 177 HOWTO(R_390_PLT12DBL, 1, 2, 12, true, 0, complain_overflow_bitfield, 178 bfd_elf_generic_reloc, "R_390_PLT12DBL", false, 0,0x00000fff, true), 179 HOWTO(R_390_PC24DBL, 1, 4, 24, true, 0, complain_overflow_bitfield, 180 bfd_elf_generic_reloc, "R_390_PC24DBL", false, 0,0x00ffffff, true), 181 HOWTO(R_390_PLT24DBL, 1, 4, 24, true, 0, complain_overflow_bitfield, 182 bfd_elf_generic_reloc, "R_390_PLT24DBL", false, 0,0x00ffffff, true), 183}; 184 185/* GNU extension to record C++ vtable hierarchy. */ 186static reloc_howto_type elf64_s390_vtinherit_howto = 187 HOWTO (R_390_GNU_VTINHERIT, 0,8,0,false,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", false,0, 0, false); 188static reloc_howto_type elf64_s390_vtentry_howto = 189 HOWTO (R_390_GNU_VTENTRY, 0,8,0,false,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", false,0,0, false); 190 191static reloc_howto_type * 192elf_s390_reloc_type_lookup (bfd *abfd, 193 bfd_reloc_code_real_type code) 194{ 195 switch (code) 196 { 197 case BFD_RELOC_NONE: 198 return &elf_howto_table[(int) R_390_NONE]; 199 case BFD_RELOC_8: 200 return &elf_howto_table[(int) R_390_8]; 201 case BFD_RELOC_390_12: 202 return &elf_howto_table[(int) R_390_12]; 203 case BFD_RELOC_16: 204 return &elf_howto_table[(int) R_390_16]; 205 case BFD_RELOC_32: 206 return &elf_howto_table[(int) R_390_32]; 207 case BFD_RELOC_CTOR: 208 return &elf_howto_table[(int) R_390_32]; 209 case BFD_RELOC_32_PCREL: 210 return &elf_howto_table[(int) R_390_PC32]; 211 case BFD_RELOC_390_GOT12: 212 return &elf_howto_table[(int) R_390_GOT12]; 213 case BFD_RELOC_32_GOT_PCREL: 214 return &elf_howto_table[(int) R_390_GOT32]; 215 case BFD_RELOC_390_PLT32: 216 return &elf_howto_table[(int) R_390_PLT32]; 217 case BFD_RELOC_390_COPY: 218 return &elf_howto_table[(int) R_390_COPY]; 219 case BFD_RELOC_390_GLOB_DAT: 220 return &elf_howto_table[(int) R_390_GLOB_DAT]; 221 case BFD_RELOC_390_JMP_SLOT: 222 return &elf_howto_table[(int) R_390_JMP_SLOT]; 223 case BFD_RELOC_390_RELATIVE: 224 return &elf_howto_table[(int) R_390_RELATIVE]; 225 case BFD_RELOC_32_GOTOFF: 226 return &elf_howto_table[(int) R_390_GOTOFF32]; 227 case BFD_RELOC_390_GOTPC: 228 return &elf_howto_table[(int) R_390_GOTPC]; 229 case BFD_RELOC_390_GOT16: 230 return &elf_howto_table[(int) R_390_GOT16]; 231 case BFD_RELOC_16_PCREL: 232 return &elf_howto_table[(int) R_390_PC16]; 233 case BFD_RELOC_390_PC12DBL: 234 return &elf_howto_table[(int) R_390_PC12DBL]; 235 case BFD_RELOC_390_PLT12DBL: 236 return &elf_howto_table[(int) R_390_PLT12DBL]; 237 case BFD_RELOC_390_PC16DBL: 238 return &elf_howto_table[(int) R_390_PC16DBL]; 239 case BFD_RELOC_390_PLT16DBL: 240 return &elf_howto_table[(int) R_390_PLT16DBL]; 241 case BFD_RELOC_390_PC24DBL: 242 return &elf_howto_table[(int) R_390_PC24DBL]; 243 case BFD_RELOC_390_PLT24DBL: 244 return &elf_howto_table[(int) R_390_PLT24DBL]; 245 case BFD_RELOC_390_PC32DBL: 246 return &elf_howto_table[(int) R_390_PC32DBL]; 247 case BFD_RELOC_390_PLT32DBL: 248 return &elf_howto_table[(int) R_390_PLT32DBL]; 249 case BFD_RELOC_390_GOTPCDBL: 250 return &elf_howto_table[(int) R_390_GOTPCDBL]; 251 case BFD_RELOC_64: 252 return &elf_howto_table[(int) R_390_64]; 253 case BFD_RELOC_64_PCREL: 254 return &elf_howto_table[(int) R_390_PC64]; 255 case BFD_RELOC_390_GOT64: 256 return &elf_howto_table[(int) R_390_GOT64]; 257 case BFD_RELOC_390_PLT64: 258 return &elf_howto_table[(int) R_390_PLT64]; 259 case BFD_RELOC_390_GOTENT: 260 return &elf_howto_table[(int) R_390_GOTENT]; 261 case BFD_RELOC_16_GOTOFF: 262 return &elf_howto_table[(int) R_390_GOTOFF16]; 263 case BFD_RELOC_390_GOTOFF64: 264 return &elf_howto_table[(int) R_390_GOTOFF64]; 265 case BFD_RELOC_390_GOTPLT12: 266 return &elf_howto_table[(int) R_390_GOTPLT12]; 267 case BFD_RELOC_390_GOTPLT16: 268 return &elf_howto_table[(int) R_390_GOTPLT16]; 269 case BFD_RELOC_390_GOTPLT32: 270 return &elf_howto_table[(int) R_390_GOTPLT32]; 271 case BFD_RELOC_390_GOTPLT64: 272 return &elf_howto_table[(int) R_390_GOTPLT64]; 273 case BFD_RELOC_390_GOTPLTENT: 274 return &elf_howto_table[(int) R_390_GOTPLTENT]; 275 case BFD_RELOC_390_PLTOFF16: 276 return &elf_howto_table[(int) R_390_PLTOFF16]; 277 case BFD_RELOC_390_PLTOFF32: 278 return &elf_howto_table[(int) R_390_PLTOFF32]; 279 case BFD_RELOC_390_PLTOFF64: 280 return &elf_howto_table[(int) R_390_PLTOFF64]; 281 case BFD_RELOC_390_TLS_LOAD: 282 return &elf_howto_table[(int) R_390_TLS_LOAD]; 283 case BFD_RELOC_390_TLS_GDCALL: 284 return &elf_howto_table[(int) R_390_TLS_GDCALL]; 285 case BFD_RELOC_390_TLS_LDCALL: 286 return &elf_howto_table[(int) R_390_TLS_LDCALL]; 287 case BFD_RELOC_390_TLS_GD64: 288 return &elf_howto_table[(int) R_390_TLS_GD64]; 289 case BFD_RELOC_390_TLS_GOTIE12: 290 return &elf_howto_table[(int) R_390_TLS_GOTIE12]; 291 case BFD_RELOC_390_TLS_GOTIE64: 292 return &elf_howto_table[(int) R_390_TLS_GOTIE64]; 293 case BFD_RELOC_390_TLS_LDM64: 294 return &elf_howto_table[(int) R_390_TLS_LDM64]; 295 case BFD_RELOC_390_TLS_IE64: 296 return &elf_howto_table[(int) R_390_TLS_IE64]; 297 case BFD_RELOC_390_TLS_IEENT: 298 return &elf_howto_table[(int) R_390_TLS_IEENT]; 299 case BFD_RELOC_390_TLS_LE64: 300 return &elf_howto_table[(int) R_390_TLS_LE64]; 301 case BFD_RELOC_390_TLS_LDO64: 302 return &elf_howto_table[(int) R_390_TLS_LDO64]; 303 case BFD_RELOC_390_TLS_DTPMOD: 304 return &elf_howto_table[(int) R_390_TLS_DTPMOD]; 305 case BFD_RELOC_390_TLS_DTPOFF: 306 return &elf_howto_table[(int) R_390_TLS_DTPOFF]; 307 case BFD_RELOC_390_TLS_TPOFF: 308 return &elf_howto_table[(int) R_390_TLS_TPOFF]; 309 case BFD_RELOC_390_20: 310 return &elf_howto_table[(int) R_390_20]; 311 case BFD_RELOC_390_GOT20: 312 return &elf_howto_table[(int) R_390_GOT20]; 313 case BFD_RELOC_390_GOTPLT20: 314 return &elf_howto_table[(int) R_390_GOTPLT20]; 315 case BFD_RELOC_390_TLS_GOTIE20: 316 return &elf_howto_table[(int) R_390_TLS_GOTIE20]; 317 case BFD_RELOC_390_IRELATIVE: 318 return &elf_howto_table[(int) R_390_IRELATIVE]; 319 case BFD_RELOC_VTABLE_INHERIT: 320 return &elf64_s390_vtinherit_howto; 321 case BFD_RELOC_VTABLE_ENTRY: 322 return &elf64_s390_vtentry_howto; 323 default: 324 break; 325 } 326 327 /* xgettext:c-format */ 328 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code); 329 bfd_set_error (bfd_error_bad_value); 330 return NULL; 331} 332 333static reloc_howto_type * 334elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 335 const char *r_name) 336{ 337 unsigned int i; 338 339 for (i = 0; 340 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); 341 i++) 342 if (elf_howto_table[i].name != NULL 343 && strcasecmp (elf_howto_table[i].name, r_name) == 0) 344 return &elf_howto_table[i]; 345 346 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0) 347 return &elf64_s390_vtinherit_howto; 348 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0) 349 return &elf64_s390_vtentry_howto; 350 351 return NULL; 352} 353 354/* We need to use ELF64_R_TYPE so we have our own copy of this function, 355 and elf64-s390.c has its own copy. */ 356 357static bool 358elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 359 arelent *cache_ptr, 360 Elf_Internal_Rela *dst) 361{ 362 unsigned int r_type = ELF64_R_TYPE(dst->r_info); 363 364 switch (r_type) 365 { 366 case R_390_GNU_VTINHERIT: 367 cache_ptr->howto = &elf64_s390_vtinherit_howto; 368 break; 369 370 case R_390_GNU_VTENTRY: 371 cache_ptr->howto = &elf64_s390_vtentry_howto; 372 break; 373 374 default: 375 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0])) 376 { 377 /* xgettext:c-format */ 378 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 379 abfd, r_type); 380 bfd_set_error (bfd_error_bad_value); 381 return false; 382 } 383 cache_ptr->howto = &elf_howto_table[r_type]; 384 } 385 return true; 386} 387 388/* A relocation function which doesn't do anything. */ 389static bfd_reloc_status_type 390s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED, 391 arelent *reloc_entry, 392 asymbol *symbol ATTRIBUTE_UNUSED, 393 void * data ATTRIBUTE_UNUSED, 394 asection *input_section, 395 bfd *output_bfd, 396 char **error_message ATTRIBUTE_UNUSED) 397{ 398 if (output_bfd) 399 reloc_entry->address += input_section->output_offset; 400 return bfd_reloc_ok; 401} 402 403/* Handle the large displacement relocs. */ 404static bfd_reloc_status_type 405s390_elf_ldisp_reloc (bfd *abfd, 406 arelent *reloc_entry, 407 asymbol *symbol, 408 void * data, 409 asection *input_section, 410 bfd *output_bfd, 411 char **error_message ATTRIBUTE_UNUSED) 412{ 413 reloc_howto_type *howto = reloc_entry->howto; 414 bfd_vma relocation; 415 bfd_vma insn; 416 417 if (output_bfd != (bfd *) NULL 418 && (symbol->flags & BSF_SECTION_SYM) == 0 419 && (! howto->partial_inplace 420 || reloc_entry->addend == 0)) 421 { 422 reloc_entry->address += input_section->output_offset; 423 return bfd_reloc_ok; 424 } 425 if (output_bfd != NULL) 426 return bfd_reloc_continue; 427 428 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 429 return bfd_reloc_outofrange; 430 431 relocation = (symbol->value 432 + symbol->section->output_section->vma 433 + symbol->section->output_offset); 434 relocation += reloc_entry->addend; 435 if (howto->pc_relative) 436 { 437 relocation -= (input_section->output_section->vma 438 + input_section->output_offset); 439 relocation -= reloc_entry->address; 440 } 441 442 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); 443 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; 444 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); 445 446 if ((bfd_signed_vma) relocation < - 0x80000 447 || (bfd_signed_vma) relocation > 0x7ffff) 448 return bfd_reloc_overflow; 449 else 450 return bfd_reloc_ok; 451} 452 453static bool 454elf_s390_is_local_label_name (bfd *abfd, const char *name) 455{ 456 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) 457 return true; 458 459 return _bfd_elf_is_local_label_name (abfd, name); 460} 461 462/* Functions for the 390 ELF linker. */ 463 464/* The name of the dynamic interpreter. This is put in the .interp 465 section. */ 466 467#define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1" 468 469/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 470 copying dynamic variables from a shared lib into an app's dynbss 471 section, and instead use a dynamic relocation to point into the 472 shared lib. */ 473#define ELIMINATE_COPY_RELOCS 1 474 475/* The size in bytes of the first entry in the procedure linkage table. */ 476#define PLT_FIRST_ENTRY_SIZE 32 477/* The size in bytes of an entry in the procedure linkage table. */ 478#define PLT_ENTRY_SIZE 32 479 480#define GOT_ENTRY_SIZE 8 481 482#define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela) 483 484/* The first three entries in a global offset table are reserved, 485 and the initial contents are unimportant (we zero them out). 486 Subsequent entries look like this. See the SVR4 ABI 386 487 supplement to see how this works. */ 488 489/* For the s390, simple addr offset can only be 0 - 4096. 490 To use the full 16777216 TB address space, several instructions 491 are needed to load an address in a register and execute 492 a branch( or just saving the address) 493 494 Furthermore, only r 0 and 1 are free to use!!! */ 495 496/* The first 3 words in the GOT are then reserved. 497 Word 0 is the address of the dynamic table. 498 Word 1 is a pointer to a structure describing the object 499 Word 2 is used to point to the loader entry address. 500 501 The code for PLT entries looks like this: 502 503 The GOT holds the address in the PLT to be executed. 504 The loader then gets: 505 48(15) = Pointer to the structure describing the object. 506 56(15) = Offset in symbol table 507 The loader must then find the module where the function is 508 and insert the address in the GOT. 509 510 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1 511 LG 1,0(1) # 6 bytes Load address from GOT in r1 512 BCR 15,1 # 2 bytes Jump to address 513 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 514 LGF 1,12(1) # 6 bytes Load rela.plt offset into r1 515 BRCL 15,-x # 6 bytes Jump to first PLT entry 516 .long ? # 4 bytes offset into .rela.plt 517 518 Total = 32 bytes per PLT entry 519 Fixup at offset 2: relative address to GOT entry 520 Fixup at offset 22: relative branch to PLT0 521 Fixup at offset 28: 32 bit offset into .rela.plt 522 523 A 32 bit offset into the symbol table is enough. It allows for 524 .rela.plt sections up to a size of 2 gigabyte. A single dynamic 525 object (the main program, any shared library) is limited to 4GB in 526 size. Having a .rela.plt of 2GB would already make the .plt 527 section bigger than 8GB. */ 528 529static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] = 530 { 531 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */ 532 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */ 533 0x07, 0xf1, /* br %r1 */ 534 0x0d, 0x10, /* basr %r1,%r0 */ 535 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */ 536 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */ 537 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */ 538 }; 539 540/* The first PLT entry pushes the offset into the symbol table 541 from R1 onto the stack at 56(15) and the loader object info 542 at 48(15), loads the loader address in R1 and jumps to it. */ 543 544/* The first entry in the PLT: 545 546 PLT0: 547 STG 1,56(15) # r1 contains the offset into the symbol table 548 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table 549 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack 550 LG 1,16(1) # get entry address of loader 551 BCR 15,1 # jump to loader 552 553 Fixup at offset 8: relative address to start of GOT. */ 554 555static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] = 556 { 557 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */ 558 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */ 559 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */ 560 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */ 561 0x07, 0xf1, /* br %r1 */ 562 0x07, 0x00, /* nopr %r0 */ 563 0x07, 0x00, /* nopr %r0 */ 564 0x07, 0x00 /* nopr %r0 */ 565 }; 566 567 568/* s390 ELF linker hash entry. */ 569 570struct elf_s390_link_hash_entry 571{ 572 struct elf_link_hash_entry elf; 573 574 /* Number of GOTPLT references for a function. */ 575 bfd_signed_vma gotplt_refcount; 576 577#define GOT_UNKNOWN 0 578#define GOT_NORMAL 1 579#define GOT_TLS_GD 2 580#define GOT_TLS_IE 3 581#define GOT_TLS_IE_NLT 3 582 unsigned char tls_type; 583 584 /* For pointer equality reasons we might need to change the symbol 585 type from STT_GNU_IFUNC to STT_FUNC together with its value and 586 section entry. So after alloc_dynrelocs only these values should 587 be used. In order to check whether a symbol is IFUNC use 588 s390_is_ifunc_symbol_p. */ 589 bfd_vma ifunc_resolver_address; 590 asection *ifunc_resolver_section; 591}; 592 593#define elf_s390_hash_entry(ent) \ 594 ((struct elf_s390_link_hash_entry *)(ent)) 595 596/* This structure represents an entry in the local PLT list needed for 597 local IFUNC symbols. */ 598struct plt_entry 599{ 600 /* The section of the local symbol. 601 Set in relocate_section and used in finish_dynamic_sections. */ 602 asection *sec; 603 604 union 605 { 606 bfd_signed_vma refcount; 607 bfd_vma offset; 608 } plt; 609}; 610 611/* NOTE: Keep this structure in sync with 612 the one declared in elf32-s390.c. */ 613struct elf_s390_obj_tdata 614{ 615 struct elf_obj_tdata root; 616 617 /* A local PLT is needed for ifunc symbols. */ 618 struct plt_entry *local_plt; 619 620 /* TLS type for each local got entry. */ 621 char *local_got_tls_type; 622}; 623 624#define elf_s390_tdata(abfd) \ 625 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) 626 627#define elf_s390_local_plt(abfd) \ 628 (elf_s390_tdata (abfd)->local_plt) 629 630#define elf_s390_local_got_tls_type(abfd) \ 631 (elf_s390_tdata (abfd)->local_got_tls_type) 632 633#define is_s390_elf(bfd) \ 634 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 635 && elf_tdata (bfd) != NULL \ 636 && elf_object_id (bfd) == S390_ELF_DATA) 637 638static bool 639elf_s390_mkobject (bfd *abfd) 640{ 641 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata), 642 S390_ELF_DATA); 643} 644 645static bool 646elf_s390_object_p (bfd *abfd) 647{ 648 /* Set the right machine number for an s390 elf32 file. */ 649 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64); 650} 651 652/* s390 ELF linker hash table. */ 653 654struct elf_s390_link_hash_table 655{ 656 struct elf_link_hash_table elf; 657 658 /* Short-cuts to get to dynamic linker sections. */ 659 asection *irelifunc; 660 661 union { 662 bfd_signed_vma refcount; 663 bfd_vma offset; 664 } tls_ldm_got; 665 666 /* Options passed from the linker. */ 667 struct s390_elf_params *params; 668}; 669 670/* Get the s390 ELF linker hash table from a link_info structure. */ 671 672#define elf_s390_hash_table(p) \ 673 ((is_elf_hash_table ((p)->hash) \ 674 && elf_hash_table_id (elf_hash_table (p)) == S390_ELF_DATA) \ 675 ? (struct elf_s390_link_hash_table *) (p)->hash : NULL) 676 677#define ELF64 1 678#include "elf-s390-common.c" 679 680/* Create an entry in an s390 ELF linker hash table. */ 681 682static struct bfd_hash_entry * 683link_hash_newfunc (struct bfd_hash_entry *entry, 684 struct bfd_hash_table *table, 685 const char *string) 686{ 687 /* Allocate the structure if it has not already been allocated by a 688 subclass. */ 689 if (entry == NULL) 690 { 691 entry = bfd_hash_allocate (table, 692 sizeof (struct elf_s390_link_hash_entry)); 693 if (entry == NULL) 694 return entry; 695 } 696 697 /* Call the allocation method of the superclass. */ 698 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 699 if (entry != NULL) 700 { 701 struct elf_s390_link_hash_entry *eh; 702 703 eh = (struct elf_s390_link_hash_entry *) entry; 704 eh->gotplt_refcount = 0; 705 eh->tls_type = GOT_UNKNOWN; 706 eh->ifunc_resolver_address = 0; 707 eh->ifunc_resolver_section = NULL; 708 } 709 710 return entry; 711} 712 713/* Create an s390 ELF linker hash table. */ 714 715static struct bfd_link_hash_table * 716elf_s390_link_hash_table_create (bfd *abfd) 717{ 718 struct elf_s390_link_hash_table *ret; 719 size_t amt = sizeof (struct elf_s390_link_hash_table); 720 721 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt); 722 if (ret == NULL) 723 return NULL; 724 725 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, 726 sizeof (struct elf_s390_link_hash_entry), 727 S390_ELF_DATA)) 728 { 729 free (ret); 730 return NULL; 731 } 732 733 return &ret->elf.root; 734} 735 736/* Copy the extra info we tack onto an elf_link_hash_entry. */ 737 738static void 739elf_s390_copy_indirect_symbol (struct bfd_link_info *info, 740 struct elf_link_hash_entry *dir, 741 struct elf_link_hash_entry *ind) 742{ 743 struct elf_s390_link_hash_entry *edir, *eind; 744 745 edir = (struct elf_s390_link_hash_entry *) dir; 746 eind = (struct elf_s390_link_hash_entry *) ind; 747 748 if (ind->root.type == bfd_link_hash_indirect 749 && dir->got.refcount <= 0) 750 { 751 edir->tls_type = eind->tls_type; 752 eind->tls_type = GOT_UNKNOWN; 753 } 754 755 if (ELIMINATE_COPY_RELOCS 756 && ind->root.type != bfd_link_hash_indirect 757 && dir->dynamic_adjusted) 758 { 759 /* If called to transfer flags for a weakdef during processing 760 of elf_adjust_dynamic_symbol, don't copy non_got_ref. 761 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 762 if (dir->versioned != versioned_hidden) 763 dir->ref_dynamic |= ind->ref_dynamic; 764 dir->ref_regular |= ind->ref_regular; 765 dir->ref_regular_nonweak |= ind->ref_regular_nonweak; 766 dir->needs_plt |= ind->needs_plt; 767 } 768 else 769 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 770} 771 772static int 773elf_s390_tls_transition (struct bfd_link_info *info, 774 int r_type, 775 int is_local) 776{ 777 if (bfd_link_dll (info)) 778 return r_type; 779 780 switch (r_type) 781 { 782 case R_390_TLS_GD64: 783 case R_390_TLS_IE64: 784 if (is_local) 785 return R_390_TLS_LE64; 786 return R_390_TLS_IE64; 787 case R_390_TLS_GOTIE64: 788 if (is_local) 789 return R_390_TLS_LE64; 790 return R_390_TLS_GOTIE64; 791 case R_390_TLS_LDM64: 792 return R_390_TLS_LE64; 793 } 794 795 return r_type; 796} 797 798/* Look through the relocs for a section during the first phase, and 799 allocate space in the global offset table or procedure linkage 800 table. */ 801 802static bool 803elf_s390_check_relocs (bfd *abfd, 804 struct bfd_link_info *info, 805 asection *sec, 806 const Elf_Internal_Rela *relocs) 807{ 808 struct elf_s390_link_hash_table *htab; 809 Elf_Internal_Shdr *symtab_hdr; 810 struct elf_link_hash_entry **sym_hashes; 811 const Elf_Internal_Rela *rel; 812 const Elf_Internal_Rela *rel_end; 813 asection *sreloc; 814 bfd_signed_vma *local_got_refcounts; 815 int tls_type, old_tls_type; 816 817 if (bfd_link_relocatable (info)) 818 return true; 819 820 BFD_ASSERT (is_s390_elf (abfd)); 821 822 htab = elf_s390_hash_table (info); 823 if (htab == NULL) 824 return false; 825 826 symtab_hdr = &elf_symtab_hdr (abfd); 827 sym_hashes = elf_sym_hashes (abfd); 828 local_got_refcounts = elf_local_got_refcounts (abfd); 829 830 sreloc = NULL; 831 832 rel_end = relocs + sec->reloc_count; 833 for (rel = relocs; rel < rel_end; rel++) 834 { 835 unsigned int r_type; 836 unsigned int r_symndx; 837 struct elf_link_hash_entry *h; 838 Elf_Internal_Sym *isym; 839 840 r_symndx = ELF64_R_SYM (rel->r_info); 841 842 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) 843 { 844 /* xgettext:c-format */ 845 _bfd_error_handler (_("%pB: bad symbol index: %d"), 846 abfd, r_symndx); 847 return false; 848 } 849 850 if (r_symndx < symtab_hdr->sh_info) 851 { 852 /* A local symbol. */ 853 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, 854 abfd, r_symndx); 855 if (isym == NULL) 856 return false; 857 858 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 859 { 860 struct plt_entry *plt; 861 862 if (htab->elf.dynobj == NULL) 863 htab->elf.dynobj = abfd; 864 865 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) 866 return false; 867 868 if (local_got_refcounts == NULL) 869 { 870 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr)) 871 return false; 872 local_got_refcounts = elf_local_got_refcounts (abfd); 873 } 874 plt = elf_s390_local_plt (abfd); 875 plt[r_symndx].plt.refcount++; 876 } 877 h = NULL; 878 } 879 else 880 { 881 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 882 while (h->root.type == bfd_link_hash_indirect 883 || h->root.type == bfd_link_hash_warning) 884 h = (struct elf_link_hash_entry *) h->root.u.i.link; 885 } 886 887 /* Create got section and local_got_refcounts array if they 888 are needed. */ 889 r_type = elf_s390_tls_transition (info, 890 ELF64_R_TYPE (rel->r_info), 891 h == NULL); 892 switch (r_type) 893 { 894 case R_390_GOT12: 895 case R_390_GOT16: 896 case R_390_GOT20: 897 case R_390_GOT32: 898 case R_390_GOT64: 899 case R_390_GOTENT: 900 case R_390_GOTPLT12: 901 case R_390_GOTPLT16: 902 case R_390_GOTPLT20: 903 case R_390_GOTPLT32: 904 case R_390_GOTPLT64: 905 case R_390_GOTPLTENT: 906 case R_390_TLS_GD64: 907 case R_390_TLS_GOTIE12: 908 case R_390_TLS_GOTIE20: 909 case R_390_TLS_GOTIE64: 910 case R_390_TLS_IEENT: 911 case R_390_TLS_IE64: 912 case R_390_TLS_LDM64: 913 if (h == NULL 914 && local_got_refcounts == NULL) 915 { 916 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr)) 917 return false; 918 local_got_refcounts = elf_local_got_refcounts (abfd); 919 } 920 921 /* Fall through. */ 922 case R_390_GOTOFF16: 923 case R_390_GOTOFF32: 924 case R_390_GOTOFF64: 925 case R_390_GOTPC: 926 case R_390_GOTPCDBL: 927 if (htab->elf.sgot == NULL) 928 { 929 if (htab->elf.dynobj == NULL) 930 htab->elf.dynobj = abfd; 931 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) 932 return false; 933 } 934 } 935 936 if (h != NULL) 937 { 938 if (htab->elf.dynobj == NULL) 939 htab->elf.dynobj = abfd; 940 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) 941 return false; 942 943 /* Make sure an IFUNC symbol defined in a non-shared object 944 always gets a PLT slot. */ 945 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 946 { 947 /* The symbol is called by the dynamic loader in order 948 to resolve the relocation. So it is in fact also 949 referenced. */ 950 h->ref_regular = 1; 951 h->needs_plt = 1; 952 } 953 } 954 955 switch (r_type) 956 { 957 case R_390_GOTPC: 958 case R_390_GOTPCDBL: 959 /* These relocs do not need a GOT slot. They just load the 960 GOT pointer itself or address something else relative to 961 the GOT. Since the GOT pointer has been set up above we 962 are done. */ 963 break; 964 case R_390_GOTOFF16: 965 case R_390_GOTOFF32: 966 case R_390_GOTOFF64: 967 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular) 968 break; 969 /* Fall through. */ 970 971 case R_390_PLT12DBL: 972 case R_390_PLT16DBL: 973 case R_390_PLT24DBL: 974 case R_390_PLT32: 975 case R_390_PLT32DBL: 976 case R_390_PLT64: 977 case R_390_PLTOFF16: 978 case R_390_PLTOFF32: 979 case R_390_PLTOFF64: 980 /* This symbol requires a procedure linkage table entry. We 981 actually build the entry in adjust_dynamic_symbol, 982 because this might be a case of linking PIC code which is 983 never referenced by a dynamic object, in which case we 984 don't need to generate a procedure linkage table entry 985 after all. */ 986 987 /* If this is a local symbol, we resolve it directly without 988 creating a procedure linkage table entry. */ 989 if (h != NULL) 990 { 991 h->needs_plt = 1; 992 h->plt.refcount += 1; 993 } 994 break; 995 996 case R_390_GOTPLT12: 997 case R_390_GOTPLT16: 998 case R_390_GOTPLT20: 999 case R_390_GOTPLT32: 1000 case R_390_GOTPLT64: 1001 case R_390_GOTPLTENT: 1002 /* This symbol requires either a procedure linkage table entry 1003 or an entry in the local got. We actually build the entry 1004 in adjust_dynamic_symbol because whether this is really a 1005 global reference can change and with it the fact if we have 1006 to create a plt entry or a local got entry. To be able to 1007 make a once global symbol a local one we have to keep track 1008 of the number of gotplt references that exist for this 1009 symbol. */ 1010 if (h != NULL) 1011 { 1012 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; 1013 h->needs_plt = 1; 1014 h->plt.refcount += 1; 1015 } 1016 else 1017 local_got_refcounts[r_symndx] += 1; 1018 break; 1019 1020 case R_390_TLS_LDM64: 1021 htab->tls_ldm_got.refcount += 1; 1022 break; 1023 1024 case R_390_TLS_IE64: 1025 case R_390_TLS_GOTIE12: 1026 case R_390_TLS_GOTIE20: 1027 case R_390_TLS_GOTIE64: 1028 case R_390_TLS_IEENT: 1029 if (bfd_link_dll (info)) 1030 info->flags |= DF_STATIC_TLS; 1031 /* Fall through */ 1032 1033 case R_390_GOT12: 1034 case R_390_GOT16: 1035 case R_390_GOT20: 1036 case R_390_GOT32: 1037 case R_390_GOT64: 1038 case R_390_GOTENT: 1039 case R_390_TLS_GD64: 1040 /* This symbol requires a global offset table entry. */ 1041 switch (r_type) 1042 { 1043 default: 1044 case R_390_GOT12: 1045 case R_390_GOT16: 1046 case R_390_GOT20: 1047 case R_390_GOT32: 1048 case R_390_GOTENT: 1049 tls_type = GOT_NORMAL; 1050 break; 1051 case R_390_TLS_GD64: 1052 tls_type = GOT_TLS_GD; 1053 break; 1054 case R_390_TLS_IE64: 1055 case R_390_TLS_GOTIE64: 1056 tls_type = GOT_TLS_IE; 1057 break; 1058 case R_390_TLS_GOTIE12: 1059 case R_390_TLS_GOTIE20: 1060 case R_390_TLS_IEENT: 1061 tls_type = GOT_TLS_IE_NLT; 1062 break; 1063 } 1064 1065 if (h != NULL) 1066 { 1067 h->got.refcount += 1; 1068 old_tls_type = elf_s390_hash_entry(h)->tls_type; 1069 } 1070 else 1071 { 1072 local_got_refcounts[r_symndx] += 1; 1073 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; 1074 } 1075 /* If a TLS symbol is accessed using IE at least once, 1076 there is no point to use dynamic model for it. */ 1077 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) 1078 { 1079 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) 1080 { 1081 _bfd_error_handler 1082 /* xgettext:c-format */ 1083 (_("%pB: `%s' accessed both as normal and thread local symbol"), 1084 abfd, h->root.root.string); 1085 return false; 1086 } 1087 if (old_tls_type > tls_type) 1088 tls_type = old_tls_type; 1089 } 1090 1091 if (old_tls_type != tls_type) 1092 { 1093 if (h != NULL) 1094 elf_s390_hash_entry (h)->tls_type = tls_type; 1095 else 1096 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; 1097 } 1098 1099 if (r_type != R_390_TLS_IE64) 1100 break; 1101 /* Fall through */ 1102 1103 case R_390_TLS_LE64: 1104 /* For static linking and executables this reloc will be 1105 calculated at linktime otherwise a TLS_TPOFF runtime 1106 reloc will be generated. */ 1107 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info)) 1108 break; 1109 1110 if (!bfd_link_dll (info)) 1111 break; 1112 info->flags |= DF_STATIC_TLS; 1113 /* Fall through */ 1114 1115 case R_390_8: 1116 case R_390_16: 1117 case R_390_32: 1118 case R_390_64: 1119 case R_390_PC12DBL: 1120 case R_390_PC16: 1121 case R_390_PC16DBL: 1122 case R_390_PC24DBL: 1123 case R_390_PC32: 1124 case R_390_PC32DBL: 1125 case R_390_PC64: 1126 if (h != NULL && bfd_link_executable (info)) 1127 { 1128 /* If this reloc is in a read-only section, we might 1129 need a copy reloc. We can't check reliably at this 1130 stage whether the section is read-only, as input 1131 sections have not yet been mapped to output sections. 1132 Tentatively set the flag for now, and correct in 1133 adjust_dynamic_symbol. */ 1134 h->non_got_ref = 1; 1135 1136 if (!bfd_link_pic (info)) 1137 { 1138 /* We may need a .plt entry if the function this reloc 1139 refers to is in a shared lib. */ 1140 h->plt.refcount += 1; 1141 } 1142 } 1143 1144 /* If we are creating a shared library, and this is a reloc 1145 against a global symbol, or a non PC relative reloc 1146 against a local symbol, then we need to copy the reloc 1147 into the shared library. However, if we are linking with 1148 -Bsymbolic, we do not need to copy a reloc against a 1149 global symbol which is defined in an object we are 1150 including in the link (i.e., DEF_REGULAR is set). At 1151 this point we have not seen all the input files, so it is 1152 possible that DEF_REGULAR is not set now but will be set 1153 later (it is never cleared). In case of a weak definition, 1154 DEF_REGULAR may be cleared later by a strong definition in 1155 a shared library. We account for that possibility below by 1156 storing information in the relocs_copied field of the hash 1157 table entry. A similar situation occurs when creating 1158 shared libraries and symbol visibility changes render the 1159 symbol local. 1160 1161 If on the other hand, we are creating an executable, we 1162 may need to keep relocations for symbols satisfied by a 1163 dynamic library if we manage to avoid copy relocs for the 1164 symbol. */ 1165 if ((bfd_link_pic (info) 1166 && (sec->flags & SEC_ALLOC) != 0 1167 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16 1168 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL 1169 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL 1170 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL 1171 && ELF64_R_TYPE (rel->r_info) != R_390_PC32 1172 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL 1173 && ELF64_R_TYPE (rel->r_info) != R_390_PC64) 1174 || (h != NULL 1175 && (! SYMBOLIC_BIND (info, h) 1176 || h->root.type == bfd_link_hash_defweak 1177 || !h->def_regular)))) 1178 || (ELIMINATE_COPY_RELOCS 1179 && !bfd_link_pic (info) 1180 && (sec->flags & SEC_ALLOC) != 0 1181 && h != NULL 1182 && (h->root.type == bfd_link_hash_defweak 1183 || !h->def_regular))) 1184 { 1185 struct elf_dyn_relocs *p; 1186 struct elf_dyn_relocs **head; 1187 1188 /* We must copy these reloc types into the output file. 1189 Create a reloc section in dynobj and make room for 1190 this reloc. */ 1191 if (sreloc == NULL) 1192 { 1193 if (htab->elf.dynobj == NULL) 1194 htab->elf.dynobj = abfd; 1195 1196 sreloc = _bfd_elf_make_dynamic_reloc_section 1197 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ true); 1198 1199 if (sreloc == NULL) 1200 return false; 1201 } 1202 1203 /* If this is a global symbol, we count the number of 1204 relocations we need for this symbol. */ 1205 if (h != NULL) 1206 { 1207 head = &h->dyn_relocs; 1208 } 1209 else 1210 { 1211 /* Track dynamic relocs needed for local syms too. 1212 We really need local syms available to do this 1213 easily. Oh well. */ 1214 asection *s; 1215 void *vpp; 1216 1217 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, 1218 abfd, r_symndx); 1219 if (isym == NULL) 1220 return false; 1221 1222 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 1223 if (s == NULL) 1224 s = sec; 1225 1226 vpp = &elf_section_data (s)->local_dynrel; 1227 head = (struct elf_dyn_relocs **) vpp; 1228 } 1229 1230 p = *head; 1231 if (p == NULL || p->sec != sec) 1232 { 1233 size_t amt = sizeof *p; 1234 p = ((struct elf_dyn_relocs *) 1235 bfd_alloc (htab->elf.dynobj, amt)); 1236 if (p == NULL) 1237 return false; 1238 p->next = *head; 1239 *head = p; 1240 p->sec = sec; 1241 p->count = 0; 1242 p->pc_count = 0; 1243 } 1244 1245 p->count += 1; 1246 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16 1247 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL 1248 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL 1249 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL 1250 || ELF64_R_TYPE (rel->r_info) == R_390_PC32 1251 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL 1252 || ELF64_R_TYPE (rel->r_info) == R_390_PC64) 1253 p->pc_count += 1; 1254 } 1255 break; 1256 1257 /* This relocation describes the C++ object vtable hierarchy. 1258 Reconstruct it for later use during GC. */ 1259 case R_390_GNU_VTINHERIT: 1260 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1261 return false; 1262 break; 1263 1264 /* This relocation describes which C++ vtable entries are actually 1265 used. Record for later use during GC. */ 1266 case R_390_GNU_VTENTRY: 1267 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1268 return false; 1269 break; 1270 1271 default: 1272 break; 1273 } 1274 } 1275 1276 return true; 1277} 1278 1279/* Return the section that should be marked against GC for a given 1280 relocation. */ 1281 1282static asection * 1283elf_s390_gc_mark_hook (asection *sec, 1284 struct bfd_link_info *info, 1285 Elf_Internal_Rela *rel, 1286 struct elf_link_hash_entry *h, 1287 Elf_Internal_Sym *sym) 1288{ 1289 if (h != NULL) 1290 switch (ELF64_R_TYPE (rel->r_info)) 1291 { 1292 case R_390_GNU_VTINHERIT: 1293 case R_390_GNU_VTENTRY: 1294 return NULL; 1295 } 1296 1297 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1298} 1299 1300/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT 1301 entry but we found we will not create any. Called when we find we will 1302 not have any PLT for this symbol, by for example 1303 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, 1304 or elf_s390_size_dynamic_sections if no dynamic sections will be 1305 created (we're only linking static objects). */ 1306 1307static void 1308elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h) 1309{ 1310 if (h->elf.root.type == bfd_link_hash_warning) 1311 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; 1312 1313 if (h->gotplt_refcount <= 0) 1314 return; 1315 1316 /* We simply add the number of gotplt references to the number 1317 * of got references for this symbol. */ 1318 h->elf.got.refcount += h->gotplt_refcount; 1319 h->gotplt_refcount = -1; 1320} 1321 1322/* Adjust a symbol defined by a dynamic object and referenced by a 1323 regular object. The current definition is in some section of the 1324 dynamic object, but we're not including those sections. We have to 1325 change the definition to something the rest of the link can 1326 understand. */ 1327 1328static bool 1329elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info, 1330 struct elf_link_hash_entry *h) 1331{ 1332 struct elf_s390_link_hash_table *htab; 1333 asection *s, *srel; 1334 1335 /* STT_GNU_IFUNC symbol must go through PLT. */ 1336 if (s390_is_ifunc_symbol_p (h)) 1337 { 1338 /* All local STT_GNU_IFUNC references must be treated as local 1339 calls via local PLT. */ 1340 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h)) 1341 { 1342 bfd_size_type pc_count = 0, count = 0; 1343 struct elf_dyn_relocs **pp; 1344 struct elf_dyn_relocs *p; 1345 1346 for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) 1347 { 1348 pc_count += p->pc_count; 1349 p->count -= p->pc_count; 1350 p->pc_count = 0; 1351 count += p->count; 1352 if (p->count == 0) 1353 *pp = p->next; 1354 else 1355 pp = &p->next; 1356 } 1357 1358 if (pc_count || count) 1359 { 1360 h->needs_plt = 1; 1361 h->non_got_ref = 1; 1362 if (h->plt.refcount <= 0) 1363 h->plt.refcount = 1; 1364 else 1365 h->plt.refcount += 1; 1366 } 1367 } 1368 1369 if (h->plt.refcount <= 0) 1370 { 1371 h->plt.offset = (bfd_vma) -1; 1372 h->needs_plt = 0; 1373 } 1374 return true; 1375 } 1376 1377 /* If this is a function, put it in the procedure linkage table. We 1378 will fill in the contents of the procedure linkage table later 1379 (although we could actually do it here). */ 1380 if (h->type == STT_FUNC 1381 || h->needs_plt) 1382 { 1383 if (h->plt.refcount <= 0 1384 || SYMBOL_CALLS_LOCAL (info, h) 1385 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) 1386 { 1387 /* This case can occur if we saw a PLT32 reloc in an input 1388 file, but the symbol was never referred to by a dynamic 1389 object, or if all references were garbage collected. In 1390 such a case, we don't actually need to build a procedure 1391 linkage table, and we can just do a PC32 reloc instead. */ 1392 h->plt.offset = (bfd_vma) -1; 1393 h->needs_plt = 0; 1394 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1395 } 1396 1397 return true; 1398 } 1399 else 1400 /* It's possible that we incorrectly decided a .plt reloc was 1401 needed for an R_390_PC32 reloc to a non-function sym in 1402 check_relocs. We can't decide accurately between function and 1403 non-function syms in check-relocs; Objects loaded later in 1404 the link may change h->type. So fix it now. */ 1405 h->plt.offset = (bfd_vma) -1; 1406 1407 /* If this is a weak symbol, and there is a real definition, the 1408 processor independent code will have arranged for us to see the 1409 real definition first, and we can just use the same value. */ 1410 if (h->is_weakalias) 1411 { 1412 struct elf_link_hash_entry *def = weakdef (h); 1413 BFD_ASSERT (def->root.type == bfd_link_hash_defined); 1414 h->root.u.def.section = def->root.u.def.section; 1415 h->root.u.def.value = def->root.u.def.value; 1416 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) 1417 h->non_got_ref = def->non_got_ref; 1418 return true; 1419 } 1420 1421 /* This is a reference to a symbol defined by a dynamic object which 1422 is not a function. */ 1423 1424 /* If we are creating a shared library, we must presume that the 1425 only references to the symbol are via the global offset table. 1426 For such cases we need not do anything here; the relocations will 1427 be handled correctly by relocate_section. */ 1428 if (bfd_link_pic (info)) 1429 return true; 1430 1431 /* If there are no references to this symbol that do not use the 1432 GOT, we don't need to generate a copy reloc. */ 1433 if (!h->non_got_ref) 1434 return true; 1435 1436 /* If -z nocopyreloc was given, we won't generate them either. */ 1437 if (info->nocopyreloc) 1438 { 1439 h->non_got_ref = 0; 1440 return true; 1441 } 1442 1443 /* If we don't find any dynamic relocs in read-only sections, then 1444 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 1445 if (ELIMINATE_COPY_RELOCS && !_bfd_elf_readonly_dynrelocs (h)) 1446 { 1447 h->non_got_ref = 0; 1448 return true; 1449 } 1450 1451 /* We must allocate the symbol in our .dynbss section, which will 1452 become part of the .bss section of the executable. There will be 1453 an entry for this symbol in the .dynsym section. The dynamic 1454 object will contain position independent code, so all references 1455 from the dynamic object to this symbol will go through the global 1456 offset table. The dynamic linker will use the .dynsym entry to 1457 determine the address it must put in the global offset table, so 1458 both the dynamic object and the regular object will refer to the 1459 same memory location for the variable. */ 1460 1461 htab = elf_s390_hash_table (info); 1462 if (htab == NULL) 1463 return false; 1464 1465 /* We must generate a R_390_COPY reloc to tell the dynamic linker to 1466 copy the initial value out of the dynamic object and into the 1467 runtime process image. */ 1468 if ((h->root.u.def.section->flags & SEC_READONLY) != 0) 1469 { 1470 s = htab->elf.sdynrelro; 1471 srel = htab->elf.sreldynrelro; 1472 } 1473 else 1474 { 1475 s = htab->elf.sdynbss; 1476 srel = htab->elf.srelbss; 1477 } 1478 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 1479 { 1480 srel->size += sizeof (Elf64_External_Rela); 1481 h->needs_copy = 1; 1482 } 1483 1484 return _bfd_elf_adjust_dynamic_copy (info, h, s); 1485} 1486 1487/* Allocate space in .plt, .got and associated reloc sections for 1488 dynamic relocs. */ 1489 1490static bool 1491allocate_dynrelocs (struct elf_link_hash_entry *h, 1492 void * inf) 1493{ 1494 struct bfd_link_info *info; 1495 struct elf_s390_link_hash_table *htab; 1496 struct elf_dyn_relocs *p; 1497 1498 if (h->root.type == bfd_link_hash_indirect) 1499 return true; 1500 1501 info = (struct bfd_link_info *) inf; 1502 htab = elf_s390_hash_table (info); 1503 if (htab == NULL) 1504 return false; 1505 1506 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it 1507 here if it is defined and referenced in a non-shared object. */ 1508 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 1509 return s390_elf_allocate_ifunc_dyn_relocs (info, h); 1510 else if (htab->elf.dynamic_sections_created 1511 && h->plt.refcount > 0) 1512 { 1513 /* Make sure this symbol is output as a dynamic symbol. 1514 Undefined weak syms won't yet be marked as dynamic. */ 1515 if (h->dynindx == -1 1516 && !h->forced_local) 1517 { 1518 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1519 return false; 1520 } 1521 1522 if (bfd_link_pic (info) 1523 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) 1524 { 1525 asection *s = htab->elf.splt; 1526 1527 /* If this is the first .plt entry, make room for the special 1528 first entry. */ 1529 if (s->size == 0) 1530 s->size += PLT_FIRST_ENTRY_SIZE; 1531 1532 h->plt.offset = s->size; 1533 1534 /* If this symbol is not defined in a regular file, and we are 1535 not generating a shared library, then set the symbol to this 1536 location in the .plt. This is required to make function 1537 pointers compare as equal between the normal executable and 1538 the shared library. */ 1539 if (! bfd_link_pic (info) 1540 && !h->def_regular) 1541 { 1542 h->root.u.def.section = s; 1543 h->root.u.def.value = h->plt.offset; 1544 } 1545 1546 /* Make room for this entry. */ 1547 s->size += PLT_ENTRY_SIZE; 1548 1549 /* We also need to make an entry in the .got.plt section. */ 1550 htab->elf.sgotplt->size += GOT_ENTRY_SIZE; 1551 1552 /* We also need to make an entry in the .rela.plt section. */ 1553 htab->elf.srelplt->size += sizeof (Elf64_External_Rela); 1554 } 1555 else 1556 { 1557 h->plt.offset = (bfd_vma) -1; 1558 h->needs_plt = 0; 1559 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1560 } 1561 } 1562 else 1563 { 1564 h->plt.offset = (bfd_vma) -1; 1565 h->needs_plt = 0; 1566 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1567 } 1568 1569 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to 1570 the binary, we can optimize a bit. IE64 and GOTIE64 get converted 1571 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT 1572 we can save the dynamic TLS relocation. */ 1573 if (h->got.refcount > 0 1574 && !bfd_link_dll (info) 1575 && h->dynindx == -1 1576 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) 1577 { 1578 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) 1579 /* For the GOTIE access without a literal pool entry the offset has 1580 to be stored somewhere. The immediate value in the instruction 1581 is not bit enough so the value is stored in the got. */ 1582 { 1583 h->got.offset = htab->elf.sgot->size; 1584 htab->elf.sgot->size += GOT_ENTRY_SIZE; 1585 } 1586 else 1587 h->got.offset = (bfd_vma) -1; 1588 } 1589 else if (h->got.refcount > 0) 1590 { 1591 asection *s; 1592 bool dyn; 1593 int tls_type = elf_s390_hash_entry(h)->tls_type; 1594 1595 /* Make sure this symbol is output as a dynamic symbol. 1596 Undefined weak syms won't yet be marked as dynamic. */ 1597 if (h->dynindx == -1 1598 && !h->forced_local) 1599 { 1600 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1601 return false; 1602 } 1603 1604 s = htab->elf.sgot; 1605 h->got.offset = s->size; 1606 s->size += GOT_ENTRY_SIZE; 1607 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */ 1608 if (tls_type == GOT_TLS_GD) 1609 s->size += GOT_ENTRY_SIZE; 1610 dyn = htab->elf.dynamic_sections_created; 1611 /* R_390_TLS_IE64 needs one dynamic relocation, 1612 R_390_TLS_GD64 needs one if local symbol and two if global. */ 1613 if ((tls_type == GOT_TLS_GD && h->dynindx == -1) 1614 || tls_type >= GOT_TLS_IE) 1615 htab->elf.srelgot->size += sizeof (Elf64_External_Rela); 1616 else if (tls_type == GOT_TLS_GD) 1617 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela); 1618 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h) 1619 && (bfd_link_pic (info) 1620 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) 1621 htab->elf.srelgot->size += sizeof (Elf64_External_Rela); 1622 } 1623 else 1624 h->got.offset = (bfd_vma) -1; 1625 1626 if (h->dyn_relocs == NULL) 1627 return true; 1628 1629 /* In the shared -Bsymbolic case, discard space allocated for 1630 dynamic pc-relative relocs against symbols which turn out to be 1631 defined in regular objects. For the normal shared case, discard 1632 space for pc-relative relocs that have become local due to symbol 1633 visibility changes. */ 1634 1635 if (bfd_link_pic (info)) 1636 { 1637 if (SYMBOL_CALLS_LOCAL (info, h)) 1638 { 1639 struct elf_dyn_relocs **pp; 1640 1641 for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) 1642 { 1643 p->count -= p->pc_count; 1644 p->pc_count = 0; 1645 if (p->count == 0) 1646 *pp = p->next; 1647 else 1648 pp = &p->next; 1649 } 1650 } 1651 1652 /* Also discard relocs on undefined weak syms with non-default 1653 visibility. */ 1654 if (h->dyn_relocs != NULL 1655 && h->root.type == bfd_link_hash_undefweak) 1656 { 1657 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 1658 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) 1659 h->dyn_relocs = NULL; 1660 1661 /* Make sure undefined weak symbols are output as a dynamic 1662 symbol in PIEs. */ 1663 else if (h->dynindx == -1 1664 && !h->forced_local) 1665 { 1666 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1667 return false; 1668 } 1669 } 1670 } 1671 else if (ELIMINATE_COPY_RELOCS) 1672 { 1673 /* For the non-shared case, discard space for relocs against 1674 symbols which turn out to need copy relocs or are not 1675 dynamic. */ 1676 1677 if (!h->non_got_ref 1678 && ((h->def_dynamic 1679 && !h->def_regular) 1680 || (htab->elf.dynamic_sections_created 1681 && (h->root.type == bfd_link_hash_undefweak 1682 || h->root.type == bfd_link_hash_undefined)))) 1683 { 1684 /* Make sure this symbol is output as a dynamic symbol. 1685 Undefined weak syms won't yet be marked as dynamic. */ 1686 if (h->dynindx == -1 1687 && !h->forced_local) 1688 { 1689 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1690 return false; 1691 } 1692 1693 /* If that succeeded, we know we'll be keeping all the 1694 relocs. */ 1695 if (h->dynindx != -1) 1696 goto keep; 1697 } 1698 1699 h->dyn_relocs = NULL; 1700 1701 keep: ; 1702 } 1703 1704 /* Finally, allocate space. */ 1705 for (p = h->dyn_relocs; p != NULL; p = p->next) 1706 { 1707 asection *sreloc = elf_section_data (p->sec)->sreloc; 1708 sreloc->size += p->count * sizeof (Elf64_External_Rela); 1709 } 1710 1711 return true; 1712} 1713 1714/* Set the sizes of the dynamic sections. */ 1715 1716static bool 1717elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 1718 struct bfd_link_info *info) 1719{ 1720 struct elf_s390_link_hash_table *htab; 1721 bfd *dynobj; 1722 asection *s; 1723 bool relocs; 1724 bfd *ibfd; 1725 1726 htab = elf_s390_hash_table (info); 1727 if (htab == NULL) 1728 return false; 1729 1730 dynobj = htab->elf.dynobj; 1731 if (dynobj == NULL) 1732 abort (); 1733 1734 if (htab->elf.dynamic_sections_created) 1735 { 1736 /* Set the contents of the .interp section to the interpreter. */ 1737 if (bfd_link_executable (info) && !info->nointerp) 1738 { 1739 s = bfd_get_linker_section (dynobj, ".interp"); 1740 if (s == NULL) 1741 abort (); 1742 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 1743 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 1744 } 1745 } 1746 1747 if (htab->elf.sgot && s390_gotplt_after_got_p (info)) 1748 { 1749 /* _bfd_elf_create_got_section adds the got header size always 1750 to .got.plt but we need it in .got if this section comes 1751 first. */ 1752 htab->elf.sgot->size += 3 * GOT_ENTRY_SIZE; 1753 htab->elf.sgotplt->size -= 3 * GOT_ENTRY_SIZE; 1754 1755 /* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got 1756 instead of .got.plt. */ 1757 htab->elf.hgot->root.u.def.section = htab->elf.sgot; 1758 htab->elf.hgot->root.u.def.value = 0; 1759 } 1760 1761 /* Set up .got offsets for local syms, and space for local dynamic 1762 relocs. */ 1763 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 1764 { 1765 bfd_signed_vma *local_got; 1766 bfd_signed_vma *end_local_got; 1767 char *local_tls_type; 1768 bfd_size_type locsymcount; 1769 Elf_Internal_Shdr *symtab_hdr; 1770 asection *srela; 1771 struct plt_entry *local_plt; 1772 unsigned int i; 1773 1774 if (! is_s390_elf (ibfd)) 1775 continue; 1776 1777 for (s = ibfd->sections; s != NULL; s = s->next) 1778 { 1779 struct elf_dyn_relocs *p; 1780 1781 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) 1782 { 1783 if (!bfd_is_abs_section (p->sec) 1784 && bfd_is_abs_section (p->sec->output_section)) 1785 { 1786 /* Input section has been discarded, either because 1787 it is a copy of a linkonce section or due to 1788 linker script /DISCARD/, so we'll be discarding 1789 the relocs too. */ 1790 } 1791 else if (p->count != 0) 1792 { 1793 srela = elf_section_data (p->sec)->sreloc; 1794 srela->size += p->count * sizeof (Elf64_External_Rela); 1795 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 1796 info->flags |= DF_TEXTREL; 1797 } 1798 } 1799 } 1800 1801 local_got = elf_local_got_refcounts (ibfd); 1802 if (!local_got) 1803 continue; 1804 1805 symtab_hdr = &elf_symtab_hdr (ibfd); 1806 locsymcount = symtab_hdr->sh_info; 1807 end_local_got = local_got + locsymcount; 1808 local_tls_type = elf_s390_local_got_tls_type (ibfd); 1809 s = htab->elf.sgot; 1810 srela = htab->elf.srelgot; 1811 for (; local_got < end_local_got; ++local_got, ++local_tls_type) 1812 { 1813 if (*local_got > 0) 1814 { 1815 *local_got = s->size; 1816 s->size += GOT_ENTRY_SIZE; 1817 if (*local_tls_type == GOT_TLS_GD) 1818 s->size += GOT_ENTRY_SIZE; 1819 if (bfd_link_pic (info)) 1820 srela->size += sizeof (Elf64_External_Rela); 1821 } 1822 else 1823 *local_got = (bfd_vma) -1; 1824 } 1825 1826 local_plt = elf_s390_local_plt (ibfd); 1827 for (i = 0; i < symtab_hdr->sh_info; i++) 1828 { 1829 if (local_plt[i].plt.refcount > 0) 1830 { 1831 local_plt[i].plt.offset = htab->elf.iplt->size; 1832 htab->elf.iplt->size += PLT_ENTRY_SIZE; 1833 htab->elf.igotplt->size += GOT_ENTRY_SIZE; 1834 htab->elf.irelplt->size += sizeof (Elf64_External_Rela); 1835 } 1836 else 1837 local_plt[i].plt.offset = (bfd_vma) -1; 1838 } 1839 } 1840 1841 if (htab->tls_ldm_got.refcount > 0) 1842 { 1843 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64 1844 relocs. */ 1845 htab->tls_ldm_got.offset = htab->elf.sgot->size; 1846 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; 1847 htab->elf.srelgot->size += sizeof (Elf64_External_Rela); 1848 } 1849 else 1850 htab->tls_ldm_got.offset = -1; 1851 1852 /* Allocate global sym .plt and .got entries, and space for global 1853 sym dynamic relocs. */ 1854 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); 1855 1856 /* We now have determined the sizes of the various dynamic sections. 1857 Allocate memory for them. */ 1858 relocs = false; 1859 for (s = dynobj->sections; s != NULL; s = s->next) 1860 { 1861 if ((s->flags & SEC_LINKER_CREATED) == 0) 1862 continue; 1863 1864 if (s == htab->elf.splt 1865 || s == htab->elf.sgot 1866 || s == htab->elf.sgotplt 1867 || s == htab->elf.sdynbss 1868 || s == htab->elf.sdynrelro 1869 || s == htab->elf.iplt 1870 || s == htab->elf.igotplt 1871 || s == htab->irelifunc) 1872 { 1873 /* Strip this section if we don't need it; see the 1874 comment below. */ 1875 } 1876 else if (startswith (bfd_section_name (s), ".rela")) 1877 { 1878 if (s->size != 0 && s != htab->elf.srelplt) 1879 { 1880 relocs = true; 1881 if (s == htab->elf.irelplt) 1882 { 1883 /* In static-pie case, there are IRELATIVE-relocs in 1884 .rela.iplt (htab->irelplt), which will later be grouped 1885 to .rela.plt. On s390, the IRELATIVE relocations are 1886 always located in .rela.iplt - even for non-static case. 1887 Ensure that DT_JMPREL, DT_PLTRELA, DT_PLTRELASZ is added 1888 to the dynamic section even if htab->srelplt->size == 0. 1889 See _bfd_elf_add_dynamic_tags in bfd/elflink.c. */ 1890 htab->elf.dt_jmprel_required = true; 1891 } 1892 } 1893 1894 /* We use the reloc_count field as a counter if we need 1895 to copy relocs into the output file. */ 1896 s->reloc_count = 0; 1897 } 1898 else 1899 { 1900 /* It's not one of our sections, so don't allocate space. */ 1901 continue; 1902 } 1903 1904 if (s->size == 0) 1905 { 1906 /* If we don't need this section, strip it from the 1907 output file. This is to handle .rela.bss and 1908 .rela.plt. We must create it in 1909 create_dynamic_sections, because it must be created 1910 before the linker maps input sections to output 1911 sections. The linker does that before 1912 adjust_dynamic_symbol is called, and it is that 1913 function which decides whether anything needs to go 1914 into these sections. */ 1915 1916 s->flags |= SEC_EXCLUDE; 1917 continue; 1918 } 1919 1920 if ((s->flags & SEC_HAS_CONTENTS) == 0) 1921 continue; 1922 1923 /* Allocate memory for the section contents. We use bfd_zalloc 1924 here in case unused entries are not reclaimed before the 1925 section's contents are written out. This should not happen, 1926 but this way if it does, we get a R_390_NONE reloc instead 1927 of garbage. */ 1928 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 1929 if (s->contents == NULL) 1930 return false; 1931 } 1932 1933 return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs); 1934} 1935 1936/* Return the base VMA address which should be subtracted from real addresses 1937 when resolving @dtpoff relocation. 1938 This is PT_TLS segment p_vaddr. */ 1939 1940static bfd_vma 1941dtpoff_base (struct bfd_link_info *info) 1942{ 1943 /* If tls_sec is NULL, we should have signalled an error already. */ 1944 if (elf_hash_table (info)->tls_sec == NULL) 1945 return 0; 1946 return elf_hash_table (info)->tls_sec->vma; 1947} 1948 1949/* Return the relocation value for @tpoff relocation 1950 if STT_TLS virtual address is ADDRESS. */ 1951 1952static bfd_vma 1953tpoff (struct bfd_link_info *info, bfd_vma address) 1954{ 1955 struct elf_link_hash_table *htab = elf_hash_table (info); 1956 1957 /* If tls_sec is NULL, we should have signalled an error already. */ 1958 if (htab->tls_sec == NULL) 1959 return 0; 1960 return htab->tls_size + htab->tls_sec->vma - address; 1961} 1962 1963/* Complain if TLS instruction relocation is against an invalid 1964 instruction. */ 1965 1966static void 1967invalid_tls_insn (bfd *input_bfd, 1968 asection *input_section, 1969 Elf_Internal_Rela *rel) 1970{ 1971 reloc_howto_type *howto; 1972 1973 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info); 1974 _bfd_error_handler 1975 /* xgettext:c-format */ 1976 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"), 1977 input_bfd, 1978 input_section, 1979 (uint64_t) rel->r_offset, 1980 howto->name); 1981 bfd_set_error (bfd_error_bad_value); 1982} 1983 1984/* Relocate a 390 ELF section. */ 1985 1986static int 1987elf_s390_relocate_section (bfd *output_bfd, 1988 struct bfd_link_info *info, 1989 bfd *input_bfd, 1990 asection *input_section, 1991 bfd_byte *contents, 1992 Elf_Internal_Rela *relocs, 1993 Elf_Internal_Sym *local_syms, 1994 asection **local_sections) 1995{ 1996 struct elf_s390_link_hash_table *htab; 1997 Elf_Internal_Shdr *symtab_hdr; 1998 struct elf_link_hash_entry **sym_hashes; 1999 bfd_vma *local_got_offsets; 2000 Elf_Internal_Rela *rel; 2001 Elf_Internal_Rela *relend; 2002 2003 if (!is_s390_elf (input_bfd)) 2004 { 2005 bfd_set_error (bfd_error_wrong_format); 2006 return false; 2007 } 2008 2009 htab = elf_s390_hash_table (info); 2010 if (htab == NULL) 2011 return false; 2012 2013 symtab_hdr = &elf_symtab_hdr (input_bfd); 2014 sym_hashes = elf_sym_hashes (input_bfd); 2015 local_got_offsets = elf_local_got_offsets (input_bfd); 2016 2017 rel = relocs; 2018 relend = relocs + input_section->reloc_count; 2019 for (; rel < relend; rel++) 2020 { 2021 unsigned int r_type; 2022 reloc_howto_type *howto; 2023 unsigned long r_symndx; 2024 struct elf_link_hash_entry *h; 2025 Elf_Internal_Sym *sym; 2026 asection *sec; 2027 bfd_vma off; 2028 bfd_vma relocation; 2029 bool unresolved_reloc; 2030 bfd_reloc_status_type r; 2031 int tls_type; 2032 bool resolved_to_zero; 2033 2034 r_type = ELF64_R_TYPE (rel->r_info); 2035 if (r_type == (int) R_390_GNU_VTINHERIT 2036 || r_type == (int) R_390_GNU_VTENTRY) 2037 continue; 2038 if (r_type >= (int) R_390_max) 2039 { 2040 bfd_set_error (bfd_error_bad_value); 2041 return false; 2042 } 2043 2044 howto = elf_howto_table + r_type; 2045 r_symndx = ELF64_R_SYM (rel->r_info); 2046 2047 h = NULL; 2048 sym = NULL; 2049 sec = NULL; 2050 unresolved_reloc = false; 2051 if (r_symndx < symtab_hdr->sh_info) 2052 { 2053 sym = local_syms + r_symndx; 2054 sec = local_sections[r_symndx]; 2055 2056 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 2057 { 2058 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd); 2059 if (local_plt == NULL) 2060 return false; 2061 2062 /* Address of the PLT slot. */ 2063 relocation = (htab->elf.iplt->output_section->vma 2064 + htab->elf.iplt->output_offset 2065 + local_plt[r_symndx].plt.offset); 2066 2067 switch (r_type) 2068 { 2069 case R_390_PLTOFF16: 2070 case R_390_PLTOFF32: 2071 case R_390_PLTOFF64: 2072 relocation -= s390_got_pointer (info); 2073 break; 2074 case R_390_GOTPLT12: 2075 case R_390_GOTPLT16: 2076 case R_390_GOTPLT20: 2077 case R_390_GOTPLT32: 2078 case R_390_GOTPLT64: 2079 case R_390_GOTPLTENT: 2080 case R_390_GOT12: 2081 case R_390_GOT16: 2082 case R_390_GOT20: 2083 case R_390_GOT32: 2084 case R_390_GOT64: 2085 case R_390_GOTENT: 2086 { 2087 /* Write the PLT slot address into the GOT slot. */ 2088 bfd_put_64 (output_bfd, relocation, 2089 htab->elf.sgot->contents + 2090 local_got_offsets[r_symndx]); 2091 relocation = (local_got_offsets[r_symndx] + 2092 s390_got_offset (info)); 2093 2094 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) 2095 relocation += s390_got_pointer (info); 2096 break; 2097 } 2098 default: 2099 break; 2100 } 2101 /* The output section is needed later in 2102 finish_dynamic_section when creating the dynamic 2103 relocation. */ 2104 local_plt[r_symndx].sec = sec; 2105 goto do_relocation; 2106 } 2107 else 2108 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2109 } 2110 else 2111 { 2112 bool warned ATTRIBUTE_UNUSED; 2113 bool ignored ATTRIBUTE_UNUSED; 2114 2115 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 2116 r_symndx, symtab_hdr, sym_hashes, 2117 h, sec, relocation, 2118 unresolved_reloc, warned, ignored); 2119 } 2120 2121 if (sec != NULL && discarded_section (sec)) 2122 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2123 rel, 1, relend, howto, 0, contents); 2124 2125 if (bfd_link_relocatable (info)) 2126 continue; 2127 2128 resolved_to_zero = (h != NULL 2129 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); 2130 2131 switch (r_type) 2132 { 2133 case R_390_GOTPLT12: 2134 case R_390_GOTPLT16: 2135 case R_390_GOTPLT20: 2136 case R_390_GOTPLT32: 2137 case R_390_GOTPLT64: 2138 case R_390_GOTPLTENT: 2139 /* There are three cases for a GOTPLT relocation. 1) The 2140 relocation is against the jump slot entry of a plt that 2141 will get emitted to the output file. 2) The relocation 2142 is against the jump slot of a plt entry that has been 2143 removed. elf_s390_adjust_gotplt has created a GOT entry 2144 as replacement. 3) The relocation is against a local symbol. 2145 Cases 2) and 3) are the same as the GOT relocation code 2146 so we just have to test for case 1 and fall through for 2147 the other two. */ 2148 if (h != NULL && h->plt.offset != (bfd_vma) -1) 2149 { 2150 bfd_vma plt_index; 2151 2152 if (s390_is_ifunc_symbol_p (h)) 2153 { 2154 /* Entry indices of .iplt and .igot.plt match 2155 1:1. No magic PLT first entry here. */ 2156 plt_index = h->plt.offset / PLT_ENTRY_SIZE; 2157 relocation = (plt_index * GOT_ENTRY_SIZE 2158 + s390_gotplt_offset (info) 2159 + htab->elf.igotplt->output_offset); 2160 } 2161 else 2162 { 2163 plt_index = ((h->plt.offset - PLT_FIRST_ENTRY_SIZE) 2164 / PLT_ENTRY_SIZE); 2165 2166 relocation = (plt_index * GOT_ENTRY_SIZE 2167 + s390_gotplt_offset (info)); 2168 } 2169 if (r_type == R_390_GOTPLTENT) 2170 relocation += s390_got_pointer (info); 2171 unresolved_reloc = false; 2172 break; 2173 } 2174 /* Fall through. */ 2175 2176 case R_390_GOT12: 2177 case R_390_GOT16: 2178 case R_390_GOT20: 2179 case R_390_GOT32: 2180 case R_390_GOT64: 2181 case R_390_GOTENT: 2182 /* Relocation is to the entry for this symbol in the global 2183 offset table. */ 2184 if (htab->elf.sgot == NULL) 2185 abort (); 2186 2187 if (h != NULL) 2188 { 2189 bool dyn; 2190 2191 off = h->got.offset; 2192 dyn = htab->elf.dynamic_sections_created; 2193 2194 if (s390_is_ifunc_symbol_p (h)) 2195 { 2196 BFD_ASSERT (h->plt.offset != (bfd_vma) -1); 2197 if (off == (bfd_vma)-1) 2198 { 2199 /* No explicit GOT usage so redirect to the 2200 got.iplt slot. */ 2201 relocation = (s390_gotplt_offset (info) 2202 + htab->elf.igotplt->output_offset 2203 + (h->plt.offset / PLT_ENTRY_SIZE 2204 * GOT_ENTRY_SIZE)); 2205 2206 /* For @GOTENT the relocation is against the offset between 2207 the instruction and the symbols entry in the GOT and not 2208 between the start of the GOT and the symbols entry. We 2209 add the vma of the GOT to get the correct value. */ 2210 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) 2211 relocation += s390_got_pointer (info); 2212 2213 break; 2214 } 2215 else 2216 { 2217 /* Explicit GOT slots must contain the address 2218 of the PLT slot. This will be handled in 2219 finish_dynamic_symbol. */ 2220 } 2221 } 2222 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 2223 bfd_link_pic (info), 2224 h) 2225 || (bfd_link_pic (info) 2226 && SYMBOL_REFERENCES_LOCAL (info, h)) 2227 || resolved_to_zero) 2228 { 2229 Elf_Internal_Sym *isym; 2230 asection *sym_sec; 2231 2232 /* This is actually a static link, or it is a 2233 -Bsymbolic link and the symbol is defined 2234 locally, or the symbol was forced to be local 2235 because of a version file. We must initialize 2236 this entry in the global offset table. Since the 2237 offset must always be a multiple of 2, we use the 2238 least significant bit to record whether we have 2239 initialized it already. 2240 2241 When doing a dynamic link, we create a .rel.got 2242 relocation entry to initialize the value. This 2243 is done in the finish_dynamic_symbol routine. */ 2244 if ((off & 1) != 0) 2245 off &= ~1; 2246 else 2247 { 2248 bfd_put_64 (output_bfd, relocation, 2249 htab->elf.sgot->contents + off); 2250 h->got.offset |= 1; 2251 } 2252 2253 /* When turning a GOT slot dereference into a direct 2254 reference using larl we have to make sure that 2255 the symbol is 1. properly aligned and 2. it is no 2256 ABS symbol or will become one. */ 2257 if ((h->def_regular 2258 && bfd_link_pic (info) 2259 && SYMBOL_REFERENCES_LOCAL (info, h)) 2260 /* lgrl rx,sym@GOTENT -> larl rx, sym */ 2261 && ((r_type == R_390_GOTENT 2262 && (bfd_get_16 (input_bfd, 2263 contents + rel->r_offset - 2) 2264 & 0xff0f) == 0xc408) 2265 /* lg rx, sym@GOT(r12) -> larl rx, sym */ 2266 || (r_type == R_390_GOT20 2267 && (bfd_get_32 (input_bfd, 2268 contents + rel->r_offset - 2) 2269 & 0xff00f000) == 0xe300c000 2270 && bfd_get_8 (input_bfd, 2271 contents + rel->r_offset + 3) == 0x04)) 2272 && (isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, 2273 input_bfd, r_symndx)) 2274 && isym->st_shndx != SHN_ABS 2275 && h != htab->elf.hdynamic 2276 && h != htab->elf.hgot 2277 && h != htab->elf.hplt 2278 && !(isym->st_value & 1) 2279 && (sym_sec = bfd_section_from_elf_index (input_bfd, 2280 isym->st_shndx)) 2281 && sym_sec->alignment_power) 2282 { 2283 unsigned short new_insn = 2284 (0xc000 | (bfd_get_8 (input_bfd, 2285 contents + rel->r_offset - 1) & 0xf0)); 2286 bfd_put_16 (output_bfd, new_insn, 2287 contents + rel->r_offset - 2); 2288 r_type = R_390_PC32DBL; 2289 rel->r_addend = 2; 2290 howto = elf_howto_table + r_type; 2291 relocation = h->root.u.def.value 2292 + h->root.u.def.section->output_section->vma 2293 + h->root.u.def.section->output_offset; 2294 goto do_relocation; 2295 } 2296 } 2297 else 2298 unresolved_reloc = false; 2299 } 2300 else 2301 { 2302 if (local_got_offsets == NULL) 2303 abort (); 2304 2305 off = local_got_offsets[r_symndx]; 2306 2307 /* The offset must always be a multiple of 8. We use 2308 the least significant bit to record whether we have 2309 already generated the necessary reloc. */ 2310 if ((off & 1) != 0) 2311 off &= ~1; 2312 else 2313 { 2314 bfd_put_64 (output_bfd, relocation, 2315 htab->elf.sgot->contents + off); 2316 2317 if (bfd_link_pic (info)) 2318 { 2319 asection *s; 2320 Elf_Internal_Rela outrel; 2321 bfd_byte *loc; 2322 2323 s = htab->elf.srelgot; 2324 if (s == NULL) 2325 abort (); 2326 2327 outrel.r_offset = (htab->elf.sgot->output_section->vma 2328 + htab->elf.sgot->output_offset 2329 + off); 2330 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 2331 outrel.r_addend = relocation; 2332 loc = s->contents; 2333 loc += s->reloc_count++ * sizeof (Elf64_External_Rela); 2334 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2335 } 2336 2337 local_got_offsets[r_symndx] |= 1; 2338 } 2339 } 2340 2341 if (off >= (bfd_vma) -2) 2342 abort (); 2343 2344 relocation = s390_got_offset (info) + off; 2345 2346 /* For @GOTENT the relocation is against the offset between 2347 the instruction and the symbols entry in the GOT and not 2348 between the start of the GOT and the symbols entry. We 2349 add the vma of the GOT to get the correct value. */ 2350 if ( r_type == R_390_GOTENT 2351 || r_type == R_390_GOTPLTENT) 2352 relocation += s390_got_pointer (info); 2353 2354 break; 2355 2356 case R_390_GOTOFF16: 2357 case R_390_GOTOFF32: 2358 case R_390_GOTOFF64: 2359 /* Relocation is relative to the start of the global offset 2360 table. */ 2361 2362 if (h != NULL 2363 && s390_is_ifunc_symbol_p (h) 2364 && h->def_regular 2365 && !bfd_link_executable (info)) 2366 { 2367 relocation = (htab->elf.iplt->output_section->vma 2368 + htab->elf.iplt->output_offset 2369 + h->plt.offset 2370 - s390_got_pointer (info)); 2371 goto do_relocation; 2372 } 2373 2374 relocation -= s390_got_pointer (info); 2375 break; 2376 2377 case R_390_GOTPC: 2378 case R_390_GOTPCDBL: 2379 /* Use global offset table as symbol value. */ 2380 relocation = s390_got_pointer (info); 2381 unresolved_reloc = false; 2382 break; 2383 2384 case R_390_PLT12DBL: 2385 case R_390_PLT16DBL: 2386 case R_390_PLT24DBL: 2387 case R_390_PLT32: 2388 case R_390_PLT32DBL: 2389 case R_390_PLT64: 2390 /* Relocation is to the entry for this symbol in the 2391 procedure linkage table. */ 2392 2393 /* Resolve a PLT32 reloc against a local symbol directly, 2394 without using the procedure linkage table. */ 2395 if (h == NULL) 2396 break; 2397 2398 if (h->plt.offset == (bfd_vma) -1 2399 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) 2400 { 2401 /* We didn't make a PLT entry for this symbol. This 2402 happens when statically linking PIC code, or when 2403 using -Bsymbolic. */ 2404 break; 2405 } 2406 if (s390_is_ifunc_symbol_p (h)) 2407 relocation = (htab->elf.iplt->output_section->vma 2408 + htab->elf.iplt->output_offset 2409 + h->plt.offset); 2410 else 2411 relocation = (htab->elf.splt->output_section->vma 2412 + htab->elf.splt->output_offset 2413 + h->plt.offset); 2414 unresolved_reloc = false; 2415 break; 2416 2417 case R_390_PLTOFF16: 2418 case R_390_PLTOFF32: 2419 case R_390_PLTOFF64: 2420 /* Relocation is to the entry for this symbol in the 2421 procedure linkage table relative to the start of the GOT. */ 2422 2423 /* For local symbols or if we didn't make a PLT entry for 2424 this symbol resolve the symbol directly. */ 2425 if (h == NULL 2426 || h->plt.offset == (bfd_vma) -1 2427 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) 2428 { 2429 relocation -= s390_got_pointer (info); 2430 break; 2431 } 2432 2433 if (s390_is_ifunc_symbol_p (h)) 2434 relocation = (htab->elf.iplt->output_section->vma 2435 + htab->elf.iplt->output_offset 2436 + h->plt.offset 2437 - s390_got_pointer (info)); 2438 else 2439 relocation = (htab->elf.splt->output_section->vma 2440 + htab->elf.splt->output_offset 2441 + h->plt.offset 2442 - s390_got_pointer (info)); 2443 unresolved_reloc = false; 2444 break; 2445 2446 case R_390_PC16: 2447 case R_390_PC12DBL: 2448 case R_390_PC16DBL: 2449 case R_390_PC24DBL: 2450 case R_390_PC32: 2451 case R_390_PC32DBL: 2452 case R_390_PC64: 2453 if (h != NULL 2454 && bfd_link_pie (info) 2455 && !h->def_regular) 2456 { 2457 _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined " 2458 "in shared library and accessed " 2459 "from executable " 2460 "(rebuild file with -fPIC ?)"), 2461 input_bfd, h->root.root.string); 2462 bfd_set_error (bfd_error_bad_value); 2463 return false; 2464 } 2465 /* The target of these relocs are instruction operands 2466 residing in read-only sections. We cannot emit a runtime 2467 reloc for it. */ 2468 if (h != NULL 2469 && s390_is_ifunc_symbol_p (h) 2470 && h->def_regular 2471 && bfd_link_pic (info)) 2472 { 2473 relocation = (htab->elf.iplt->output_section->vma 2474 + htab->elf.iplt->output_offset 2475 + h->plt.offset); 2476 goto do_relocation; 2477 } 2478 /* Fall through. */ 2479 2480 case R_390_8: 2481 case R_390_16: 2482 case R_390_32: 2483 case R_390_64: 2484 2485 if ((input_section->flags & SEC_ALLOC) == 0) 2486 break; 2487 2488 if (h != NULL 2489 && s390_is_ifunc_symbol_p (h) 2490 && h->def_regular) 2491 { 2492 if (!bfd_link_pic (info)) 2493 { 2494 /* For a non-shared object the symbol will not 2495 change. Hence we can write the address of the 2496 target IPLT slot now. */ 2497 relocation = (htab->elf.iplt->output_section->vma 2498 + htab->elf.iplt->output_offset 2499 + h ->plt.offset); 2500 goto do_relocation; 2501 } 2502 else 2503 { 2504 /* For shared objects a runtime relocation is needed. */ 2505 2506 Elf_Internal_Rela outrel; 2507 asection *sreloc; 2508 2509 /* Need a dynamic relocation to get the real function 2510 address. */ 2511 outrel.r_offset = _bfd_elf_section_offset (output_bfd, 2512 info, 2513 input_section, 2514 rel->r_offset); 2515 if (outrel.r_offset == (bfd_vma) -1 2516 || outrel.r_offset == (bfd_vma) -2) 2517 abort (); 2518 2519 outrel.r_offset += (input_section->output_section->vma 2520 + input_section->output_offset); 2521 2522 if (h->dynindx == -1 2523 || h->forced_local 2524 || bfd_link_executable (info)) 2525 { 2526 /* This symbol is resolved locally. */ 2527 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE); 2528 outrel.r_addend = (h->root.u.def.value 2529 + h->root.u.def.section->output_section->vma 2530 + h->root.u.def.section->output_offset); 2531 } 2532 else 2533 { 2534 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); 2535 outrel.r_addend = 0; 2536 } 2537 2538 sreloc = htab->elf.irelifunc; 2539 elf_append_rela (output_bfd, sreloc, &outrel); 2540 2541 /* If this reloc is against an external symbol, we 2542 do not want to fiddle with the addend. Otherwise, 2543 we need to include the symbol value so that it 2544 becomes an addend for the dynamic reloc. For an 2545 internal symbol, we have updated addend. */ 2546 continue; 2547 } 2548 } 2549 2550 if ((bfd_link_pic (info) 2551 && (h == NULL 2552 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 2553 && !resolved_to_zero) 2554 || h->root.type != bfd_link_hash_undefweak) 2555 && ((r_type != R_390_PC16 2556 && r_type != R_390_PC12DBL 2557 && r_type != R_390_PC16DBL 2558 && r_type != R_390_PC24DBL 2559 && r_type != R_390_PC32 2560 && r_type != R_390_PC32DBL 2561 && r_type != R_390_PC64) 2562 || !SYMBOL_CALLS_LOCAL (info, h))) 2563 || (ELIMINATE_COPY_RELOCS 2564 && !bfd_link_pic (info) 2565 && h != NULL 2566 && h->dynindx != -1 2567 && !h->non_got_ref 2568 && ((h->def_dynamic 2569 && !h->def_regular) 2570 || h->root.type == bfd_link_hash_undefweak 2571 || h->root.type == bfd_link_hash_undefined))) 2572 { 2573 Elf_Internal_Rela outrel; 2574 bool skip, relocate; 2575 asection *sreloc; 2576 bfd_byte *loc; 2577 2578 /* When generating a shared object, these relocations 2579 are copied into the output file to be resolved at run 2580 time. */ 2581 skip = false; 2582 relocate = false; 2583 2584 outrel.r_offset = 2585 _bfd_elf_section_offset (output_bfd, info, input_section, 2586 rel->r_offset); 2587 if (outrel.r_offset == (bfd_vma) -1) 2588 skip = true; 2589 else if (outrel.r_offset == (bfd_vma) -2) 2590 skip = true, relocate = true; 2591 2592 outrel.r_offset += (input_section->output_section->vma 2593 + input_section->output_offset); 2594 2595 if (skip) 2596 memset (&outrel, 0, sizeof outrel); 2597 else if (h != NULL 2598 && h->dynindx != -1 2599 && (r_type == R_390_PC16 2600 || r_type == R_390_PC12DBL 2601 || r_type == R_390_PC16DBL 2602 || r_type == R_390_PC24DBL 2603 || r_type == R_390_PC32 2604 || r_type == R_390_PC32DBL 2605 || r_type == R_390_PC64 2606 || !bfd_link_pic (info) 2607 || !SYMBOLIC_BIND (info, h) 2608 || !h->def_regular)) 2609 { 2610 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); 2611 outrel.r_addend = rel->r_addend; 2612 } 2613 else 2614 { 2615 /* This symbol is local, or marked to become local. */ 2616 outrel.r_addend = relocation + rel->r_addend; 2617 if (r_type == R_390_64) 2618 { 2619 relocate = true; 2620 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 2621 } 2622 else 2623 { 2624 long sindx; 2625 2626 if (bfd_is_abs_section (sec)) 2627 sindx = 0; 2628 else if (sec == NULL || sec->owner == NULL) 2629 { 2630 bfd_set_error(bfd_error_bad_value); 2631 return false; 2632 } 2633 else 2634 { 2635 asection *osec; 2636 2637 osec = sec->output_section; 2638 sindx = elf_section_data (osec)->dynindx; 2639 2640 if (sindx == 0) 2641 { 2642 osec = htab->elf.text_index_section; 2643 sindx = elf_section_data (osec)->dynindx; 2644 } 2645 BFD_ASSERT (sindx != 0); 2646 2647 /* We are turning this relocation into one 2648 against a section symbol, so subtract out 2649 the output section's address but not the 2650 offset of the input section in the output 2651 section. */ 2652 outrel.r_addend -= osec->vma; 2653 } 2654 outrel.r_info = ELF64_R_INFO (sindx, r_type); 2655 } 2656 } 2657 2658 sreloc = elf_section_data (input_section)->sreloc; 2659 if (sreloc == NULL) 2660 abort (); 2661 2662 loc = sreloc->contents; 2663 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 2664 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2665 2666 /* If this reloc is against an external symbol, we do 2667 not want to fiddle with the addend. Otherwise, we 2668 need to include the symbol value so that it becomes 2669 an addend for the dynamic reloc. */ 2670 if (! relocate) 2671 continue; 2672 } 2673 2674 break; 2675 2676 /* Relocations for tls literal pool entries. */ 2677 case R_390_TLS_IE64: 2678 if (bfd_link_dll (info)) 2679 { 2680 Elf_Internal_Rela outrel; 2681 asection *sreloc; 2682 bfd_byte *loc; 2683 2684 outrel.r_offset = rel->r_offset 2685 + input_section->output_section->vma 2686 + input_section->output_offset; 2687 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 2688 sreloc = elf_section_data (input_section)->sreloc; 2689 if (sreloc == NULL) 2690 abort (); 2691 loc = sreloc->contents; 2692 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 2693 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc); 2694 } 2695 /* Fall through. */ 2696 2697 case R_390_TLS_GD64: 2698 case R_390_TLS_GOTIE64: 2699 r_type = elf_s390_tls_transition (info, r_type, h == NULL); 2700 tls_type = GOT_UNKNOWN; 2701 if (h == NULL && local_got_offsets) 2702 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 2703 else if (h != NULL) 2704 { 2705 tls_type = elf_s390_hash_entry(h)->tls_type; 2706 if (!bfd_link_dll (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE) 2707 r_type = R_390_TLS_LE64; 2708 } 2709 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE) 2710 r_type = R_390_TLS_IE64; 2711 2712 if (r_type == R_390_TLS_LE64) 2713 { 2714 /* This relocation gets optimized away by the local exec 2715 access optimization. */ 2716 BFD_ASSERT (! unresolved_reloc); 2717 bfd_put_64 (output_bfd, -tpoff (info, relocation), 2718 contents + rel->r_offset); 2719 continue; 2720 } 2721 2722 if (htab->elf.sgot == NULL) 2723 abort (); 2724 2725 if (h != NULL) 2726 off = h->got.offset; 2727 else 2728 { 2729 if (local_got_offsets == NULL) 2730 abort (); 2731 2732 off = local_got_offsets[r_symndx]; 2733 } 2734 2735 emit_tls_relocs: 2736 2737 if ((off & 1) != 0) 2738 off &= ~1; 2739 else 2740 { 2741 Elf_Internal_Rela outrel; 2742 bfd_byte *loc; 2743 int dr_type, indx; 2744 2745 if (htab->elf.srelgot == NULL) 2746 abort (); 2747 2748 outrel.r_offset = (htab->elf.sgot->output_section->vma 2749 + htab->elf.sgot->output_offset + off); 2750 2751 indx = h && h->dynindx != -1 ? h->dynindx : 0; 2752 if (r_type == R_390_TLS_GD64) 2753 dr_type = R_390_TLS_DTPMOD; 2754 else 2755 dr_type = R_390_TLS_TPOFF; 2756 if (dr_type == R_390_TLS_TPOFF && indx == 0) 2757 outrel.r_addend = relocation - dtpoff_base (info); 2758 else 2759 outrel.r_addend = 0; 2760 outrel.r_info = ELF64_R_INFO (indx, dr_type); 2761 loc = htab->elf.srelgot->contents; 2762 loc += htab->elf.srelgot->reloc_count++ 2763 * sizeof (Elf64_External_Rela); 2764 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2765 2766 if (r_type == R_390_TLS_GD64) 2767 { 2768 if (indx == 0) 2769 { 2770 BFD_ASSERT (! unresolved_reloc); 2771 bfd_put_64 (output_bfd, 2772 relocation - dtpoff_base (info), 2773 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); 2774 } 2775 else 2776 { 2777 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF); 2778 outrel.r_offset += GOT_ENTRY_SIZE; 2779 outrel.r_addend = 0; 2780 htab->elf.srelgot->reloc_count++; 2781 loc += sizeof (Elf64_External_Rela); 2782 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2783 } 2784 } 2785 2786 if (h != NULL) 2787 h->got.offset |= 1; 2788 else 2789 local_got_offsets[r_symndx] |= 1; 2790 } 2791 2792 if (off >= (bfd_vma) -2) 2793 abort (); 2794 if (r_type == ELF64_R_TYPE (rel->r_info)) 2795 { 2796 relocation = htab->elf.sgot->output_offset + off; 2797 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT) 2798 relocation += htab->elf.sgot->output_section->vma; 2799 unresolved_reloc = false; 2800 } 2801 else 2802 { 2803 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off, 2804 contents + rel->r_offset); 2805 continue; 2806 } 2807 break; 2808 2809 case R_390_TLS_GOTIE12: 2810 case R_390_TLS_GOTIE20: 2811 case R_390_TLS_IEENT: 2812 if (h == NULL) 2813 { 2814 if (local_got_offsets == NULL) 2815 abort(); 2816 off = local_got_offsets[r_symndx]; 2817 if (bfd_link_dll (info)) 2818 goto emit_tls_relocs; 2819 } 2820 else 2821 { 2822 off = h->got.offset; 2823 tls_type = elf_s390_hash_entry(h)->tls_type; 2824 if (bfd_link_dll (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE) 2825 goto emit_tls_relocs; 2826 } 2827 2828 if (htab->elf.sgot == NULL) 2829 abort (); 2830 2831 BFD_ASSERT (! unresolved_reloc); 2832 bfd_put_64 (output_bfd, -tpoff (info, relocation), 2833 htab->elf.sgot->contents + off); 2834 relocation = htab->elf.sgot->output_offset + off; 2835 if (r_type == R_390_TLS_IEENT) 2836 relocation += htab->elf.sgot->output_section->vma; 2837 unresolved_reloc = false; 2838 break; 2839 2840 case R_390_TLS_LDM64: 2841 if (! bfd_link_dll (info)) 2842 /* The literal pool entry this relocation refers to gets ignored 2843 by the optimized code of the local exec model. Do nothing 2844 and the value will turn out zero. */ 2845 continue; 2846 2847 if (htab->elf.sgot == NULL) 2848 abort (); 2849 2850 off = htab->tls_ldm_got.offset; 2851 if (off & 1) 2852 off &= ~1; 2853 else 2854 { 2855 Elf_Internal_Rela outrel; 2856 bfd_byte *loc; 2857 2858 if (htab->elf.srelgot == NULL) 2859 abort (); 2860 2861 outrel.r_offset = (htab->elf.sgot->output_section->vma 2862 + htab->elf.sgot->output_offset + off); 2863 2864 bfd_put_64 (output_bfd, 0, 2865 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); 2866 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD); 2867 outrel.r_addend = 0; 2868 loc = htab->elf.srelgot->contents; 2869 loc += htab->elf.srelgot->reloc_count++ 2870 * sizeof (Elf64_External_Rela); 2871 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2872 htab->tls_ldm_got.offset |= 1; 2873 } 2874 relocation = htab->elf.sgot->output_offset + off; 2875 unresolved_reloc = false; 2876 break; 2877 2878 case R_390_TLS_LE64: 2879 if (bfd_link_dll (info)) 2880 { 2881 /* Linking a shared library with non-fpic code requires 2882 a R_390_TLS_TPOFF relocation. */ 2883 Elf_Internal_Rela outrel; 2884 asection *sreloc; 2885 bfd_byte *loc; 2886 int indx; 2887 2888 outrel.r_offset = rel->r_offset 2889 + input_section->output_section->vma 2890 + input_section->output_offset; 2891 if (h != NULL && h->dynindx != -1) 2892 indx = h->dynindx; 2893 else 2894 indx = 0; 2895 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF); 2896 if (indx == 0) 2897 outrel.r_addend = relocation - dtpoff_base (info); 2898 else 2899 outrel.r_addend = 0; 2900 sreloc = elf_section_data (input_section)->sreloc; 2901 if (sreloc == NULL) 2902 abort (); 2903 loc = sreloc->contents; 2904 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 2905 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2906 } 2907 else 2908 { 2909 BFD_ASSERT (! unresolved_reloc); 2910 bfd_put_64 (output_bfd, -tpoff (info, relocation), 2911 contents + rel->r_offset); 2912 } 2913 continue; 2914 2915 case R_390_TLS_LDO64: 2916 if (bfd_link_dll (info) || (input_section->flags & SEC_DEBUGGING)) 2917 relocation -= dtpoff_base (info); 2918 else 2919 /* When converting LDO to LE, we must negate. */ 2920 relocation = -tpoff (info, relocation); 2921 break; 2922 2923 /* Relocations for tls instructions. */ 2924 case R_390_TLS_LOAD: 2925 case R_390_TLS_GDCALL: 2926 case R_390_TLS_LDCALL: 2927 tls_type = GOT_UNKNOWN; 2928 if (h == NULL && local_got_offsets) 2929 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 2930 else if (h != NULL) 2931 tls_type = elf_s390_hash_entry(h)->tls_type; 2932 2933 if (tls_type == GOT_TLS_GD) 2934 continue; 2935 2936 if (r_type == R_390_TLS_LOAD) 2937 { 2938 if (!bfd_link_dll (info) && (h == NULL || h->dynindx == -1)) 2939 { 2940 /* IE->LE transition. Four valid cases: 2941 lg %rx,(0,%ry) -> sllg %rx,%ry,0 2942 lg %rx,(%ry,0) -> sllg %rx,%ry,0 2943 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0 2944 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */ 2945 unsigned int insn0, insn1, ry; 2946 2947 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); 2948 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); 2949 if (insn1 != 0x0004) 2950 { 2951 invalid_tls_insn (input_bfd, input_section, rel); 2952 return false; 2953 } 2954 if ((insn0 & 0xff00f000) == 0xe3000000) 2955 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */ 2956 ry = (insn0 & 0x000f0000); 2957 else if ((insn0 & 0xff0f0000) == 0xe3000000) 2958 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */ 2959 ry = (insn0 & 0x0000f000) << 4; 2960 else if ((insn0 & 0xff00f000) == 0xe300c000) 2961 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */ 2962 ry = (insn0 & 0x000f0000); 2963 else if ((insn0 & 0xff0f0000) == 0xe30c0000) 2964 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */ 2965 ry = (insn0 & 0x0000f000) << 4; 2966 else 2967 { 2968 invalid_tls_insn (input_bfd, input_section, rel); 2969 return false; 2970 } 2971 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry; 2972 insn1 = 0x000d; 2973 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); 2974 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); 2975 } 2976 } 2977 else if (r_type == R_390_TLS_GDCALL) 2978 { 2979 unsigned int insn0, insn1; 2980 2981 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); 2982 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); 2983 if ((insn0 & 0xffff0000) != 0xc0e50000) 2984 { 2985 invalid_tls_insn (input_bfd, input_section, rel); 2986 return false; 2987 } 2988 if (!bfd_link_dll (info) && (h == NULL || h->dynindx == -1)) 2989 { 2990 /* GD->LE transition. 2991 brasl %r14,__tls_get_addr@plt -> brcl 0,. */ 2992 insn0 = 0xc0040000; 2993 insn1 = 0x0000; 2994 } 2995 else 2996 { 2997 /* GD->IE transition. 2998 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */ 2999 insn0 = 0xe322c000; 3000 insn1 = 0x0004; 3001 } 3002 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); 3003 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); 3004 } 3005 else if (r_type == R_390_TLS_LDCALL) 3006 { 3007 if (!bfd_link_dll (info)) 3008 { 3009 unsigned int insn0, insn1; 3010 3011 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); 3012 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); 3013 if ((insn0 & 0xffff0000) != 0xc0e50000) 3014 { 3015 invalid_tls_insn (input_bfd, input_section, rel); 3016 return false; 3017 } 3018 /* LD->LE transition. 3019 brasl %r14,__tls_get_addr@plt -> brcl 0,. */ 3020 insn0 = 0xc0040000; 3021 insn1 = 0x0000; 3022 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); 3023 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); 3024 } 3025 } 3026 continue; 3027 3028 default: 3029 break; 3030 } 3031 3032 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections 3033 because such sections are not SEC_ALLOC and thus ld.so will 3034 not process them. */ 3035 if (unresolved_reloc 3036 && !((input_section->flags & SEC_DEBUGGING) != 0 3037 && h->def_dynamic) 3038 && _bfd_elf_section_offset (output_bfd, info, input_section, 3039 rel->r_offset) != (bfd_vma) -1) 3040 _bfd_error_handler 3041 /* xgettext:c-format */ 3042 (_("%pB(%pA+%#" PRIx64 "): " 3043 "unresolvable %s relocation against symbol `%s'"), 3044 input_bfd, 3045 input_section, 3046 (uint64_t) rel->r_offset, 3047 howto->name, 3048 h->root.root.string); 3049 3050 do_relocation: 3051 3052 /* When applying a 24 bit reloc we need to start one byte 3053 earlier. Otherwise the 32 bit get/put bfd operations might 3054 access a byte after the actual section. */ 3055 if (r_type == R_390_PC24DBL 3056 || r_type == R_390_PLT24DBL) 3057 rel->r_offset--; 3058 3059 /* Issue an error if the right shift implied by the relocation 3060 would drop bits from the symbol value. */ 3061 if (howto->rightshift 3062 && (relocation & (((bfd_vma)1 << howto->rightshift) - 1))) 3063 { 3064 _bfd_error_handler 3065 /* xgettext:c-format */ 3066 (_("%pB(%pA+%#" PRIx64 "): " 3067 "misaligned symbol `%s' (%#" PRIx64 ") for relocation %s"), 3068 input_bfd, 3069 input_section, 3070 (uint64_t) rel->r_offset, 3071 h->root.root.string, 3072 (uint64_t)relocation, 3073 howto->name); 3074 return false; 3075 } 3076 3077 if (r_type == R_390_20 3078 || r_type == R_390_GOT20 3079 || r_type == R_390_GOTPLT20 3080 || r_type == R_390_TLS_GOTIE20) 3081 { 3082 relocation += rel->r_addend; 3083 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; 3084 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3085 contents, rel->r_offset, 3086 relocation, 0); 3087 } 3088 else 3089 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3090 contents, rel->r_offset, 3091 relocation, rel->r_addend); 3092 3093 if (r != bfd_reloc_ok) 3094 { 3095 const char *name; 3096 3097 if (h != NULL) 3098 name = h->root.root.string; 3099 else 3100 { 3101 name = bfd_elf_string_from_elf_section (input_bfd, 3102 symtab_hdr->sh_link, 3103 sym->st_name); 3104 if (name == NULL) 3105 return false; 3106 if (*name == '\0') 3107 name = bfd_section_name (sec); 3108 } 3109 3110 if (r == bfd_reloc_overflow) 3111 (*info->callbacks->reloc_overflow) 3112 (info, (h ? &h->root : NULL), name, howto->name, 3113 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 3114 else 3115 { 3116 _bfd_error_handler 3117 /* xgettext:c-format */ 3118 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"), 3119 input_bfd, input_section, 3120 (uint64_t) rel->r_offset, name, (int) r); 3121 return false; 3122 } 3123 } 3124 } 3125 3126 return true; 3127} 3128 3129/* Generate the PLT slots together with the dynamic relocations needed 3130 for IFUNC symbols. */ 3131 3132static void 3133elf_s390_finish_ifunc_symbol (bfd *output_bfd, 3134 struct bfd_link_info *info, 3135 struct elf_link_hash_entry *h, 3136 struct elf_s390_link_hash_table *htab, 3137 bfd_vma plt_offset, 3138 bfd_vma resolver_address) 3139{ 3140 bfd_vma plt_index; 3141 bfd_vma got_offset; 3142 Elf_Internal_Rela rela; 3143 bfd_byte *loc; 3144 asection *plt, *gotplt, *relplt; 3145 3146 if (htab->elf.iplt == NULL 3147 || htab->elf.igotplt == NULL 3148 || htab->elf.irelplt == NULL) 3149 abort (); 3150 3151 /* Index of the PLT slot within iplt section. */ 3152 plt_index = plt_offset / PLT_ENTRY_SIZE; 3153 plt = htab->elf.iplt; 3154 /* Offset into the igot.plt section. */ 3155 got_offset = plt_index * GOT_ENTRY_SIZE; 3156 gotplt = htab->elf.igotplt; 3157 relplt = htab->elf.irelplt; 3158 3159 /* Fill in the blueprint of a PLT. */ 3160 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry, 3161 PLT_ENTRY_SIZE); 3162 3163 /* Fixup the relative address to the GOT entry */ 3164 bfd_put_32 (output_bfd, 3165 (gotplt->output_section->vma + 3166 gotplt->output_offset + got_offset 3167 - (plt->output_section->vma + 3168 plt->output_offset + 3169 plt_offset))/2, 3170 plt->contents + plt_offset + 2); 3171 /* Fixup the relative branch to PLT 0 */ 3172 bfd_put_32 (output_bfd, - (plt->output_offset + 3173 (PLT_ENTRY_SIZE * plt_index) + 22)/2, 3174 plt->contents + plt_offset + 24); 3175 /* Fixup offset into .rela.plt section. */ 3176 bfd_put_32 (output_bfd, relplt->output_offset + 3177 plt_index * sizeof (Elf64_External_Rela), 3178 plt->contents + plt_offset + 28); 3179 3180 /* Fill in the entry in the global offset table. 3181 Points to instruction after GOT offset. */ 3182 bfd_put_64 (output_bfd, 3183 (plt->output_section->vma 3184 + plt->output_offset 3185 + plt_offset 3186 + 14), 3187 gotplt->contents + got_offset); 3188 3189 /* Fill in the entry in the .rela.plt section. */ 3190 rela.r_offset = (gotplt->output_section->vma 3191 + gotplt->output_offset 3192 + got_offset); 3193 3194 if (!h 3195 || h->dynindx == -1 3196 || ((bfd_link_executable (info) 3197 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 3198 && h->def_regular)) 3199 { 3200 /* The symbol can be locally resolved. */ 3201 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE); 3202 rela.r_addend = resolver_address; 3203 } 3204 else 3205 { 3206 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); 3207 rela.r_addend = 0; 3208 } 3209 3210 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela); 3211 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3212} 3213 3214 3215/* Finish up dynamic symbol handling. We set the contents of various 3216 dynamic sections here. */ 3217 3218static bool 3219elf_s390_finish_dynamic_symbol (bfd *output_bfd, 3220 struct bfd_link_info *info, 3221 struct elf_link_hash_entry *h, 3222 Elf_Internal_Sym *sym) 3223{ 3224 struct elf_s390_link_hash_table *htab; 3225 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h; 3226 3227 htab = elf_s390_hash_table (info); 3228 if (htab == NULL) 3229 return false; 3230 3231 if (h->plt.offset != (bfd_vma) -1) 3232 { 3233 bfd_vma plt_index; 3234 bfd_vma gotplt_offset; 3235 Elf_Internal_Rela rela; 3236 bfd_byte *loc; 3237 3238 /* This symbol has an entry in the procedure linkage table. Set 3239 it up. */ 3240 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 3241 { 3242 elf_s390_finish_ifunc_symbol (output_bfd, info, h, 3243 htab, h->plt.offset, 3244 eh->ifunc_resolver_address + 3245 eh->ifunc_resolver_section->output_offset + 3246 eh->ifunc_resolver_section->output_section->vma); 3247 3248 /* Do not return yet. Handling of explicit GOT slots of 3249 IFUNC symbols is below. */ 3250 } 3251 else 3252 { 3253 if (h->dynindx == -1 3254 || htab->elf.splt == NULL 3255 || htab->elf.sgotplt == NULL 3256 || htab->elf.srelplt == NULL) 3257 abort (); 3258 3259 /* Calc. index no. 3260 Current offset - size first entry / entry size. */ 3261 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; 3262 3263 /* The slots in the .got.plt correspond to the PLT slots in 3264 the same order. */ 3265 gotplt_offset = plt_index * GOT_ENTRY_SIZE; 3266 3267 /* If .got.plt comes first it needs to contain the 3 header 3268 entries. */ 3269 if (!s390_gotplt_after_got_p (info)) 3270 gotplt_offset += 3 * GOT_ENTRY_SIZE; 3271 3272 /* Fill in the blueprint of a PLT. */ 3273 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry, 3274 PLT_ENTRY_SIZE); 3275 3276 /* The first instruction in the PLT entry is a LARL loading 3277 the address of the GOT slot. We write the 4 byte 3278 immediate operand of the LARL instruction here. */ 3279 bfd_put_32 (output_bfd, 3280 (htab->elf.sgotplt->output_section->vma + 3281 htab->elf.sgotplt->output_offset + gotplt_offset 3282 - (htab->elf.splt->output_section->vma + 3283 htab->elf.splt->output_offset + 3284 h->plt.offset))/2, 3285 htab->elf.splt->contents + h->plt.offset + 2); 3286 /* Fixup the relative branch to PLT 0 */ 3287 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE + 3288 (PLT_ENTRY_SIZE * plt_index) + 22)/2, 3289 htab->elf.splt->contents + h->plt.offset + 24); 3290 /* Fixup offset into .rela.plt section. */ 3291 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela), 3292 htab->elf.splt->contents + h->plt.offset + 28); 3293 3294 /* Fill in the entry in the global offset table. 3295 Points to instruction after GOT offset. */ 3296 bfd_put_64 (output_bfd, 3297 (htab->elf.splt->output_section->vma 3298 + htab->elf.splt->output_offset 3299 + h->plt.offset 3300 + 14), 3301 htab->elf.sgotplt->contents + gotplt_offset); 3302 3303 /* Fill in the entry in the .rela.plt section. */ 3304 rela.r_offset = (htab->elf.sgotplt->output_section->vma 3305 + htab->elf.sgotplt->output_offset 3306 + gotplt_offset); 3307 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); 3308 rela.r_addend = 0; 3309 loc = htab->elf.srelplt->contents + plt_index * 3310 sizeof (Elf64_External_Rela); 3311 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3312 3313 if (!h->def_regular) 3314 { 3315 /* Mark the symbol as undefined, rather than as defined in 3316 the .plt section. Leave the value alone. This is a clue 3317 for the dynamic linker, to make function pointer 3318 comparisons work between an application and shared 3319 library. */ 3320 sym->st_shndx = SHN_UNDEF; 3321 } 3322 } 3323 } 3324 3325 if (h->got.offset != (bfd_vma) -1 3326 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD 3327 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE 3328 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) 3329 { 3330 Elf_Internal_Rela rela; 3331 bfd_byte *loc; 3332 3333 /* This symbol has an entry in the global offset table. Set it 3334 up. */ 3335 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) 3336 abort (); 3337 3338 rela.r_offset = (htab->elf.sgot->output_section->vma 3339 + htab->elf.sgot->output_offset 3340 + (h->got.offset &~ (bfd_vma) 1)); 3341 3342 if (h->def_regular && s390_is_ifunc_symbol_p (h)) 3343 { 3344 if (bfd_link_pic (info)) 3345 { 3346 /* An explicit GOT slot usage needs GLOB_DAT. If the 3347 symbol references local the implicit got.iplt slot 3348 will be used and the IRELATIVE reloc has been created 3349 above. */ 3350 goto do_glob_dat; 3351 } 3352 else 3353 { 3354 /* For non-shared objects explicit GOT slots must be 3355 filled with the PLT slot address for pointer 3356 equality reasons. */ 3357 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma 3358 + htab->elf.iplt->output_offset 3359 + h->plt.offset), 3360 htab->elf.sgot->contents + h->got.offset); 3361 return true; 3362 } 3363 } 3364 else if (bfd_link_pic (info) 3365 && SYMBOL_REFERENCES_LOCAL (info, h)) 3366 { 3367 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) 3368 return true; 3369 3370 /* If this is a static link, or it is a -Bsymbolic link and 3371 the symbol is defined locally or was forced to be local 3372 because of a version file, we just want to emit a 3373 RELATIVE reloc. The entry in the global offset table 3374 will already have been initialized in the 3375 relocate_section function. */ 3376 if (!(h->def_regular || ELF_COMMON_DEF_P (h))) 3377 return false; 3378 BFD_ASSERT((h->got.offset & 1) != 0); 3379 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 3380 rela.r_addend = (h->root.u.def.value 3381 + h->root.u.def.section->output_section->vma 3382 + h->root.u.def.section->output_offset); 3383 } 3384 else 3385 { 3386 BFD_ASSERT((h->got.offset & 1) == 0); 3387 do_glob_dat: 3388 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset); 3389 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT); 3390 rela.r_addend = 0; 3391 } 3392 3393 loc = htab->elf.srelgot->contents; 3394 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela); 3395 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3396 } 3397 3398 if (h->needs_copy) 3399 { 3400 Elf_Internal_Rela rela; 3401 asection *s; 3402 bfd_byte *loc; 3403 3404 /* This symbols needs a copy reloc. Set it up. */ 3405 3406 if (h->dynindx == -1 3407 || (h->root.type != bfd_link_hash_defined 3408 && h->root.type != bfd_link_hash_defweak) 3409 || htab->elf.srelbss == NULL) 3410 abort (); 3411 3412 rela.r_offset = (h->root.u.def.value 3413 + h->root.u.def.section->output_section->vma 3414 + h->root.u.def.section->output_offset); 3415 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY); 3416 rela.r_addend = 0; 3417 if (h->root.u.def.section == htab->elf.sdynrelro) 3418 s = htab->elf.sreldynrelro; 3419 else 3420 s = htab->elf.srelbss; 3421 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela); 3422 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3423 } 3424 3425 /* Mark some specially defined symbols as absolute. */ 3426 if (h == htab->elf.hdynamic 3427 || h == htab->elf.hgot 3428 || h == htab->elf.hplt) 3429 sym->st_shndx = SHN_ABS; 3430 3431 return true; 3432} 3433 3434/* Used to decide how to sort relocs in an optimal manner for the 3435 dynamic linker, before writing them out. */ 3436 3437static enum elf_reloc_type_class 3438elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 3439 const asection *rel_sec ATTRIBUTE_UNUSED, 3440 const Elf_Internal_Rela *rela) 3441{ 3442 bfd *abfd = info->output_bfd; 3443 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 3444 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info); 3445 unsigned long r_symndx = ELF64_R_SYM (rela->r_info); 3446 Elf_Internal_Sym sym; 3447 3448 if (htab->elf.dynsym == NULL 3449 || !bed->s->swap_symbol_in (abfd, 3450 (htab->elf.dynsym->contents 3451 + r_symndx * bed->s->sizeof_sym), 3452 0, &sym)) 3453 abort (); 3454 3455 /* Check relocation against STT_GNU_IFUNC symbol. */ 3456 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) 3457 return reloc_class_ifunc; 3458 3459 switch ((int) ELF64_R_TYPE (rela->r_info)) 3460 { 3461 case R_390_RELATIVE: 3462 return reloc_class_relative; 3463 case R_390_JMP_SLOT: 3464 return reloc_class_plt; 3465 case R_390_COPY: 3466 return reloc_class_copy; 3467 default: 3468 return reloc_class_normal; 3469 } 3470} 3471 3472/* Finish up the dynamic sections. */ 3473 3474static bool 3475elf_s390_finish_dynamic_sections (bfd *output_bfd, 3476 struct bfd_link_info *info) 3477{ 3478 struct elf_s390_link_hash_table *htab; 3479 bfd *dynobj; 3480 asection *sdyn; 3481 bfd *ibfd; 3482 unsigned int i; 3483 3484 htab = elf_s390_hash_table (info); 3485 if (htab == NULL) 3486 return false; 3487 3488 dynobj = htab->elf.dynobj; 3489 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 3490 3491 if (htab->elf.dynamic_sections_created) 3492 { 3493 Elf64_External_Dyn *dyncon, *dynconend; 3494 3495 if (sdyn == NULL || htab->elf.sgot == NULL) 3496 abort (); 3497 3498 dyncon = (Elf64_External_Dyn *) sdyn->contents; 3499 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); 3500 for (; dyncon < dynconend; dyncon++) 3501 { 3502 Elf_Internal_Dyn dyn; 3503 asection *s; 3504 3505 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); 3506 3507 switch (dyn.d_tag) 3508 { 3509 default: 3510 continue; 3511 3512 case DT_PLTGOT: 3513 /* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */ 3514 dyn.d_un.d_ptr = s390_got_pointer (info); 3515 break; 3516 3517 case DT_JMPREL: 3518 s = htab->elf.srelplt; 3519 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 3520 break; 3521 3522 case DT_PLTRELSZ: 3523 dyn.d_un.d_val = htab->elf.srelplt->size; 3524 if (htab->elf.irelplt) 3525 dyn.d_un.d_val += htab->elf.irelplt->size; 3526 break; 3527 3528 case DT_RELASZ: 3529 /* The procedure linkage table relocs (DT_JMPREL) should 3530 not be included in the overall relocs (DT_RELA). 3531 Therefore, we override the DT_RELASZ entry here to 3532 make it not include the JMPREL relocs. Since the 3533 linker script arranges for .rela.plt to follow all 3534 other relocation sections, we don't have to worry 3535 about changing the DT_RELA entry. */ 3536 dyn.d_un.d_val -= htab->elf.srelplt->size; 3537 if (htab->elf.irelplt) 3538 dyn.d_un.d_val -= htab->elf.irelplt->size; 3539 break; 3540 } 3541 3542 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); 3543 } 3544 3545 /* Fill in the special first entry in the procedure linkage table. */ 3546 if (htab->elf.splt && htab->elf.splt->size > 0) 3547 { 3548 /* fill in blueprint for plt 0 entry */ 3549 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry, 3550 PLT_FIRST_ENTRY_SIZE); 3551 /* The second instruction in the first PLT entry is a LARL 3552 loading the GOT pointer. Fill in the LARL immediate 3553 address. */ 3554 bfd_put_32 (output_bfd, 3555 (s390_got_pointer (info) 3556 - htab->elf.splt->output_section->vma 3557 - htab->elf.splt->output_offset - 6)/2, 3558 htab->elf.splt->contents + 8); 3559 } 3560 if (elf_section_data (htab->elf.splt->output_section) != NULL) 3561 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize 3562 = PLT_ENTRY_SIZE; 3563 } 3564 3565 if (htab->elf.hgot && htab->elf.hgot->root.u.def.section) 3566 { 3567 /* Fill in the first three entries in the global offset table. */ 3568 if (htab->elf.hgot->root.u.def.section->size > 0) 3569 { 3570 bfd_put_64 (output_bfd, 3571 (sdyn == NULL ? (bfd_vma) 0 3572 : sdyn->output_section->vma + sdyn->output_offset), 3573 htab->elf.hgot->root.u.def.section->contents); 3574 /* One entry for shared object struct ptr. */ 3575 bfd_put_64 (output_bfd, (bfd_vma) 0, 3576 htab->elf.hgot->root.u.def.section->contents + 8); 3577 /* One entry for _dl_runtime_resolve. */ 3578 bfd_put_64 (output_bfd, (bfd_vma) 0, 3579 htab->elf.hgot->root.u.def.section->contents + 16); 3580 } 3581 if (htab->elf.sgot != NULL && htab->elf.sgot->size > 0) 3582 elf_section_data (htab->elf.sgot->output_section) 3583 ->this_hdr.sh_entsize = 8; 3584 } 3585 3586 /* Finish dynamic symbol for local IFUNC symbols. */ 3587 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 3588 { 3589 struct plt_entry *local_plt; 3590 Elf_Internal_Sym *isym; 3591 Elf_Internal_Shdr *symtab_hdr; 3592 3593 symtab_hdr = &elf_symtab_hdr (ibfd); 3594 3595 if (!is_s390_elf (ibfd)) 3596 continue; 3597 3598 local_plt = elf_s390_local_plt (ibfd); 3599 if (local_plt != NULL) 3600 for (i = 0; i < symtab_hdr->sh_info; i++) 3601 { 3602 if (local_plt[i].plt.offset != (bfd_vma) -1) 3603 { 3604 asection *sec = local_plt[i].sec; 3605 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, ibfd, i); 3606 if (isym == NULL) 3607 return false; 3608 3609 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 3610 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab, 3611 local_plt[i].plt.offset, 3612 isym->st_value 3613 + sec->output_section->vma 3614 + sec->output_offset); 3615 3616 } 3617 } 3618 } 3619 3620 return true; 3621} 3622 3623/* Support for core dump NOTE sections. */ 3624 3625static bool 3626elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 3627{ 3628 int offset; 3629 size_t size; 3630 3631 switch (note->descsz) 3632 { 3633 default: 3634 return false; 3635 3636 case 336: /* sizeof(struct elf_prstatus) on s390x */ 3637 /* pr_cursig */ 3638 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 3639 3640 /* pr_pid */ 3641 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32); 3642 3643 /* pr_reg */ 3644 offset = 112; 3645 size = 216; 3646 break; 3647 } 3648 3649 /* Make a ".reg/999" section. */ 3650 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 3651 size, note->descpos + offset); 3652} 3653 3654static bool 3655elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 3656{ 3657 switch (note->descsz) 3658 { 3659 default: 3660 return false; 3661 3662 case 136: /* sizeof(struct elf_prpsinfo) on s390x */ 3663 elf_tdata (abfd)->core->pid 3664 = bfd_get_32 (abfd, note->descdata + 24); 3665 elf_tdata (abfd)->core->program 3666 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); 3667 elf_tdata (abfd)->core->command 3668 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); 3669 } 3670 3671 /* Note that for some reason, a spurious space is tacked 3672 onto the end of the args in some (at least one anyway) 3673 implementations, so strip it off if it exists. */ 3674 3675 { 3676 char *command = elf_tdata (abfd)->core->command; 3677 int n = strlen (command); 3678 3679 if (0 < n && command[n - 1] == ' ') 3680 command[n - 1] = '\0'; 3681 } 3682 3683 return true; 3684} 3685 3686static char * 3687elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz, 3688 int note_type, ...) 3689{ 3690 va_list ap; 3691 3692 switch (note_type) 3693 { 3694 default: 3695 return NULL; 3696 3697 case NT_PRPSINFO: 3698 { 3699 char data[136] ATTRIBUTE_NONSTRING = { 0 }; 3700 const char *fname, *psargs; 3701 3702 va_start (ap, note_type); 3703 fname = va_arg (ap, const char *); 3704 psargs = va_arg (ap, const char *); 3705 va_end (ap); 3706 3707 strncpy (data + 40, fname, 16); 3708#if GCC_VERSION == 8000 || GCC_VERSION == 8001 3709 DIAGNOSTIC_PUSH; 3710 /* GCC 8.0 and 8.1 warn about 80 equals destination size with 3711 -Wstringop-truncation: 3712 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643 3713 */ 3714 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION; 3715#endif 3716 strncpy (data + 56, psargs, 80); 3717#if GCC_VERSION == 8000 || GCC_VERSION == 8001 3718 DIAGNOSTIC_POP; 3719#endif 3720 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, 3721 &data, sizeof (data)); 3722 } 3723 3724 case NT_PRSTATUS: 3725 { 3726 char data[336] = { 0 }; 3727 long pid; 3728 int cursig; 3729 const void *gregs; 3730 3731 va_start (ap, note_type); 3732 pid = va_arg (ap, long); 3733 cursig = va_arg (ap, int); 3734 gregs = va_arg (ap, const void *); 3735 va_end (ap); 3736 3737 bfd_put_16 (abfd, cursig, data + 12); 3738 bfd_put_32 (abfd, pid, data + 32); 3739 memcpy (data + 112, gregs, 216); 3740 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, 3741 &data, sizeof (data)); 3742 } 3743 } 3744 /* NOTREACHED */ 3745} 3746 3747/* Return address for Ith PLT stub in section PLT, for relocation REL 3748 or (bfd_vma) -1 if it should not be included. */ 3749 3750static bfd_vma 3751elf_s390_plt_sym_val (bfd_vma i, const asection *plt, 3752 const arelent *rel ATTRIBUTE_UNUSED) 3753{ 3754 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; 3755} 3756 3757/* Merge backend specific data from an object file to the output 3758 object file when linking. */ 3759 3760static bool 3761elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 3762{ 3763 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd)) 3764 return true; 3765 3766 return elf_s390_merge_obj_attributes (ibfd, info); 3767} 3768 3769/* We may add a PT_S390_PGSTE program header. */ 3770 3771static int 3772elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED, 3773 struct bfd_link_info *info) 3774{ 3775 struct elf_s390_link_hash_table *htab; 3776 3777 if (info) 3778 { 3779 htab = elf_s390_hash_table (info); 3780 if (htab) 3781 return htab->params->pgste; 3782 } 3783 return 0; 3784} 3785 3786 3787/* Add the PT_S390_PGSTE program header. */ 3788 3789static bool 3790elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info) 3791{ 3792 struct elf_s390_link_hash_table *htab; 3793 struct elf_segment_map *m, *pm = NULL; 3794 3795 if (!abfd || !info) 3796 return true; 3797 3798 htab = elf_s390_hash_table (info); 3799 if (!htab || !htab->params->pgste) 3800 return true; 3801 3802 /* If there is already a PT_S390_PGSTE header, avoid adding 3803 another. */ 3804 m = elf_seg_map (abfd); 3805 while (m && m->p_type != PT_S390_PGSTE) 3806 { 3807 pm = m; 3808 m = m->next; 3809 } 3810 3811 if (m) 3812 return true; 3813 3814 m = (struct elf_segment_map *) 3815 bfd_zalloc (abfd, sizeof (struct elf_segment_map)); 3816 if (m == NULL) 3817 return false; 3818 m->p_type = PT_S390_PGSTE; 3819 m->count = 0; 3820 m->next = NULL; 3821 if (pm) 3822 pm->next = m; 3823 3824 return true; 3825} 3826 3827bool 3828bfd_elf_s390_set_options (struct bfd_link_info *info, 3829 struct s390_elf_params *params) 3830{ 3831 struct elf_s390_link_hash_table *htab; 3832 3833 if (info) 3834 { 3835 htab = elf_s390_hash_table (info); 3836 if (htab) 3837 htab->params = params; 3838 } 3839 3840 return true; 3841} 3842 3843 3844/* Why was the hash table entry size definition changed from 3845 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and 3846 this is the only reason for the s390_elf64_size_info structure. */ 3847 3848const struct elf_size_info s390_elf64_size_info = 3849{ 3850 sizeof (Elf64_External_Ehdr), 3851 sizeof (Elf64_External_Phdr), 3852 sizeof (Elf64_External_Shdr), 3853 sizeof (Elf64_External_Rel), 3854 sizeof (Elf64_External_Rela), 3855 sizeof (Elf64_External_Sym), 3856 sizeof (Elf64_External_Dyn), 3857 sizeof (Elf_External_Note), 3858 8, /* hash-table entry size. */ 3859 1, /* internal relocations per external relocations. */ 3860 64, /* arch_size. */ 3861 3, /* log_file_align. */ 3862 ELFCLASS64, EV_CURRENT, 3863 bfd_elf64_write_out_phdrs, 3864 bfd_elf64_write_shdrs_and_ehdr, 3865 bfd_elf64_checksum_contents, 3866 bfd_elf64_write_relocs, 3867 bfd_elf64_swap_symbol_in, 3868 bfd_elf64_swap_symbol_out, 3869 bfd_elf64_slurp_reloc_table, 3870 bfd_elf64_slurp_symbol_table, 3871 bfd_elf64_swap_dyn_in, 3872 bfd_elf64_swap_dyn_out, 3873 bfd_elf64_swap_reloc_in, 3874 bfd_elf64_swap_reloc_out, 3875 bfd_elf64_swap_reloca_in, 3876 bfd_elf64_swap_reloca_out 3877}; 3878 3879#define TARGET_BIG_SYM s390_elf64_vec 3880#define TARGET_BIG_NAME "elf64-s390" 3881#define ELF_ARCH bfd_arch_s390 3882#define ELF_TARGET_ID S390_ELF_DATA 3883#define ELF_MACHINE_CODE EM_S390 3884#define ELF_MACHINE_ALT1 EM_S390_OLD 3885#define ELF_MAXPAGESIZE 0x1000 3886 3887#define elf_backend_size_info s390_elf64_size_info 3888 3889#define elf_backend_can_gc_sections 1 3890#define elf_backend_can_refcount 1 3891#define elf_backend_want_got_plt 1 3892#define elf_backend_plt_readonly 1 3893#define elf_backend_want_plt_sym 0 3894#define elf_backend_got_header_size 24 3895#define elf_backend_want_dynrelro 1 3896#define elf_backend_rela_normal 1 3897 3898#define elf_info_to_howto elf_s390_info_to_howto 3899 3900#define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name 3901#define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create 3902#define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup 3903#define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup 3904#define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data 3905 3906#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol 3907#define elf_backend_check_relocs elf_s390_check_relocs 3908#define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol 3909#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections 3910#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections 3911#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol 3912#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook 3913#define elf_backend_reloc_type_class elf_s390_reloc_type_class 3914#define elf_backend_relocate_section elf_s390_relocate_section 3915#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections 3916#define elf_backend_init_index_section _bfd_elf_init_1_index_section 3917#define elf_backend_grok_prstatus elf_s390_grok_prstatus 3918#define elf_backend_grok_psinfo elf_s390_grok_psinfo 3919#define elf_backend_write_core_note elf_s390_write_core_note 3920#define elf_backend_plt_sym_val elf_s390_plt_sym_val 3921#define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p 3922#define elf_backend_additional_program_headers elf_s390_additional_program_headers 3923#define elf_backend_modify_segment_map elf_s390_modify_segment_map 3924 3925#define bfd_elf64_mkobject elf_s390_mkobject 3926#define elf_backend_object_p elf_s390_object_p 3927 3928#include "elf64-target.h" 3929