1 /* IBM S/390-specific support for 64-bit ELF 2 Copyright (C) 2000-2020 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 35 static bfd_reloc_status_type 36 s390_tls_reloc (bfd *, arelent *, asymbol *, void *, 37 asection *, bfd *, char **); 38 static bfd_reloc_status_type 39 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *, 40 asection *, bfd *, char **); 41 42 /* The relocation "howto" table. */ 43 static reloc_howto_type elf_howto_table[] = 44 { 45 HOWTO (R_390_NONE, /* type */ 46 0, /* rightshift */ 47 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */ 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, 0, 8, FALSE, 0, complain_overflow_bitfield, 60 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), 61 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 62 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), 63 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 64 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), 65 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 66 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), 67 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 68 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), 69 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield, 70 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), 71 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 72 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), 73 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 74 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), 75 HOWTO(R_390_COPY, 0, 4, 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, 4, 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, 4, 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, 4, 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, 2, 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, 4, 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, 1, 16, FALSE, 0, complain_overflow_bitfield, 88 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), 89 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, 90 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), 91 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, 92 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), 93 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, 94 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), 95 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 96 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), 97 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 98 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), 99 HOWTO(R_390_GOTPCDBL, 1, 2, 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, 4, 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, 4, 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, 4, 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, 4, 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, 2, 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, 1, 16, FALSE, 0, complain_overflow_bitfield, 112 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), 113 HOWTO(R_390_GOTOFF64, 0, 4, 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, 1, 12, FALSE, 0, complain_overflow_dont, 116 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), 117 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 118 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), 119 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 120 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), 121 HOWTO(R_390_GOTPLT64, 0, 4, 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, 2, 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, 1, 16, FALSE, 0, complain_overflow_bitfield, 126 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), 127 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 128 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), 129 HOWTO(R_390_PLTOFF64, 0, 4, 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, 4, 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, 1, 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, 4, 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, 4, 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, 4, 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, 2, 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, 2, 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, 4, 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, 4, 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, 4, 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, 4, 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, 2, 20, FALSE, 8, complain_overflow_dont, 166 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE), 167 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, 168 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE), 169 HOWTO(R_390_GOTPLT20, 0, 2, 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, 2, 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, 4, 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, 1, 12, TRUE, 0, complain_overflow_bitfield, 176 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE), 177 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, 178 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE), 179 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, 180 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE), 181 HOWTO(R_390_PLT24DBL, 1, 2, 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. */ 186 static reloc_howto_type elf64_s390_vtinherit_howto = 187 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); 188 static reloc_howto_type elf64_s390_vtentry_howto = 189 HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE); 190 191 static reloc_howto_type * 192 elf_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 } 332 333 static reloc_howto_type * 334 elf_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. */ 356 357 static bfd_boolean 358 elf_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. */ 389 static bfd_reloc_status_type 390 s390_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. */ 404 static bfd_reloc_status_type 405 s390_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 } 452 453 static bfd_boolean 454 elf_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. */ 528 529 static 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. */ 554 555 static 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. */ 569 570 struct elf_s390_link_hash_entry 571 { 572 struct elf_link_hash_entry elf; 573 574 /* Track dynamic relocs copied for this symbol. */ 575 struct elf_dyn_relocs *dyn_relocs; 576 577 /* Number of GOTPLT references for a function. */ 578 bfd_signed_vma gotplt_refcount; 579 580 #define GOT_UNKNOWN 0 581 #define GOT_NORMAL 1 582 #define GOT_TLS_GD 2 583 #define GOT_TLS_IE 3 584 #define GOT_TLS_IE_NLT 3 585 unsigned char tls_type; 586 587 /* For pointer equality reasons we might need to change the symbol 588 type from STT_GNU_IFUNC to STT_FUNC together with its value and 589 section entry. So after alloc_dynrelocs only these values should 590 be used. In order to check whether a symbol is IFUNC use 591 s390_is_ifunc_symbol_p. */ 592 bfd_vma ifunc_resolver_address; 593 asection *ifunc_resolver_section; 594 }; 595 596 #define elf_s390_hash_entry(ent) \ 597 ((struct elf_s390_link_hash_entry *)(ent)) 598 599 /* This structure represents an entry in the local PLT list needed for 600 local IFUNC symbols. */ 601 struct plt_entry 602 { 603 /* The section of the local symbol. 604 Set in relocate_section and used in finish_dynamic_sections. */ 605 asection *sec; 606 607 union 608 { 609 bfd_signed_vma refcount; 610 bfd_vma offset; 611 } plt; 612 }; 613 614 /* NOTE: Keep this structure in sync with 615 the one declared in elf32-s390.c. */ 616 struct elf_s390_obj_tdata 617 { 618 struct elf_obj_tdata root; 619 620 /* A local PLT is needed for ifunc symbols. */ 621 struct plt_entry *local_plt; 622 623 /* TLS type for each local got entry. */ 624 char *local_got_tls_type; 625 }; 626 627 #define elf_s390_tdata(abfd) \ 628 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) 629 630 #define elf_s390_local_plt(abfd) \ 631 (elf_s390_tdata (abfd)->local_plt) 632 633 #define elf_s390_local_got_tls_type(abfd) \ 634 (elf_s390_tdata (abfd)->local_got_tls_type) 635 636 #define is_s390_elf(bfd) \ 637 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 638 && elf_tdata (bfd) != NULL \ 639 && elf_object_id (bfd) == S390_ELF_DATA) 640 641 static bfd_boolean 642 elf_s390_mkobject (bfd *abfd) 643 { 644 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata), 645 S390_ELF_DATA); 646 } 647 648 static bfd_boolean 649 elf_s390_object_p (bfd *abfd) 650 { 651 /* Set the right machine number for an s390 elf32 file. */ 652 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64); 653 } 654 655 /* s390 ELF linker hash table. */ 656 657 struct elf_s390_link_hash_table 658 { 659 struct elf_link_hash_table elf; 660 661 /* Short-cuts to get to dynamic linker sections. */ 662 asection *irelifunc; 663 664 union { 665 bfd_signed_vma refcount; 666 bfd_vma offset; 667 } tls_ldm_got; 668 669 /* Small local sym cache. */ 670 struct sym_cache sym_cache; 671 672 /* Options passed from the linker. */ 673 struct s390_elf_params *params; 674 }; 675 676 /* Get the s390 ELF linker hash table from a link_info structure. */ 677 678 #define elf_s390_hash_table(p) \ 679 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 680 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL) 681 682 #define ELF64 1 683 #include "elf-s390-common.c" 684 685 /* Create an entry in an s390 ELF linker hash table. */ 686 687 static struct bfd_hash_entry * 688 link_hash_newfunc (struct bfd_hash_entry *entry, 689 struct bfd_hash_table *table, 690 const char *string) 691 { 692 /* Allocate the structure if it has not already been allocated by a 693 subclass. */ 694 if (entry == NULL) 695 { 696 entry = bfd_hash_allocate (table, 697 sizeof (struct elf_s390_link_hash_entry)); 698 if (entry == NULL) 699 return entry; 700 } 701 702 /* Call the allocation method of the superclass. */ 703 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 704 if (entry != NULL) 705 { 706 struct elf_s390_link_hash_entry *eh; 707 708 eh = (struct elf_s390_link_hash_entry *) entry; 709 eh->dyn_relocs = NULL; 710 eh->gotplt_refcount = 0; 711 eh->tls_type = GOT_UNKNOWN; 712 eh->ifunc_resolver_address = 0; 713 eh->ifunc_resolver_section = NULL; 714 } 715 716 return entry; 717 } 718 719 /* Create an s390 ELF linker hash table. */ 720 721 static struct bfd_link_hash_table * 722 elf_s390_link_hash_table_create (bfd *abfd) 723 { 724 struct elf_s390_link_hash_table *ret; 725 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); 726 727 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt); 728 if (ret == NULL) 729 return NULL; 730 731 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, 732 sizeof (struct elf_s390_link_hash_entry), 733 S390_ELF_DATA)) 734 { 735 free (ret); 736 return NULL; 737 } 738 739 return &ret->elf.root; 740 } 741 742 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 743 744 static void 745 elf_s390_copy_indirect_symbol (struct bfd_link_info *info, 746 struct elf_link_hash_entry *dir, 747 struct elf_link_hash_entry *ind) 748 { 749 struct elf_s390_link_hash_entry *edir, *eind; 750 751 edir = (struct elf_s390_link_hash_entry *) dir; 752 eind = (struct elf_s390_link_hash_entry *) ind; 753 754 if (eind->dyn_relocs != NULL) 755 { 756 if (edir->dyn_relocs != NULL) 757 { 758 struct elf_dyn_relocs **pp; 759 struct elf_dyn_relocs *p; 760 761 /* Add reloc counts against the indirect sym to the direct sym 762 list. Merge any entries against the same section. */ 763 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 764 { 765 struct elf_dyn_relocs *q; 766 767 for (q = edir->dyn_relocs; q != NULL; q = q->next) 768 if (q->sec == p->sec) 769 { 770 q->pc_count += p->pc_count; 771 q->count += p->count; 772 *pp = p->next; 773 break; 774 } 775 if (q == NULL) 776 pp = &p->next; 777 } 778 *pp = edir->dyn_relocs; 779 } 780 781 edir->dyn_relocs = eind->dyn_relocs; 782 eind->dyn_relocs = NULL; 783 } 784 785 if (ind->root.type == bfd_link_hash_indirect 786 && dir->got.refcount <= 0) 787 { 788 edir->tls_type = eind->tls_type; 789 eind->tls_type = GOT_UNKNOWN; 790 } 791 792 if (ELIMINATE_COPY_RELOCS 793 && ind->root.type != bfd_link_hash_indirect 794 && dir->dynamic_adjusted) 795 { 796 /* If called to transfer flags for a weakdef during processing 797 of elf_adjust_dynamic_symbol, don't copy non_got_ref. 798 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 799 if (dir->versioned != versioned_hidden) 800 dir->ref_dynamic |= ind->ref_dynamic; 801 dir->ref_regular |= ind->ref_regular; 802 dir->ref_regular_nonweak |= ind->ref_regular_nonweak; 803 dir->needs_plt |= ind->needs_plt; 804 } 805 else 806 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 807 } 808 809 static int 810 elf_s390_tls_transition (struct bfd_link_info *info, 811 int r_type, 812 int is_local) 813 { 814 if (bfd_link_pic (info)) 815 return r_type; 816 817 switch (r_type) 818 { 819 case R_390_TLS_GD64: 820 case R_390_TLS_IE64: 821 if (is_local) 822 return R_390_TLS_LE64; 823 return R_390_TLS_IE64; 824 case R_390_TLS_GOTIE64: 825 if (is_local) 826 return R_390_TLS_LE64; 827 return R_390_TLS_GOTIE64; 828 case R_390_TLS_LDM64: 829 return R_390_TLS_LE64; 830 } 831 832 return r_type; 833 } 834 835 /* Look through the relocs for a section during the first phase, and 836 allocate space in the global offset table or procedure linkage 837 table. */ 838 839 static bfd_boolean 840 elf_s390_check_relocs (bfd *abfd, 841 struct bfd_link_info *info, 842 asection *sec, 843 const Elf_Internal_Rela *relocs) 844 { 845 struct elf_s390_link_hash_table *htab; 846 Elf_Internal_Shdr *symtab_hdr; 847 struct elf_link_hash_entry **sym_hashes; 848 const Elf_Internal_Rela *rel; 849 const Elf_Internal_Rela *rel_end; 850 asection *sreloc; 851 bfd_signed_vma *local_got_refcounts; 852 int tls_type, old_tls_type; 853 854 if (bfd_link_relocatable (info)) 855 return TRUE; 856 857 BFD_ASSERT (is_s390_elf (abfd)); 858 859 htab = elf_s390_hash_table (info); 860 if (htab == NULL) 861 return FALSE; 862 863 symtab_hdr = &elf_symtab_hdr (abfd); 864 sym_hashes = elf_sym_hashes (abfd); 865 local_got_refcounts = elf_local_got_refcounts (abfd); 866 867 sreloc = NULL; 868 869 rel_end = relocs + sec->reloc_count; 870 for (rel = relocs; rel < rel_end; rel++) 871 { 872 unsigned int r_type; 873 unsigned int r_symndx; 874 struct elf_link_hash_entry *h; 875 Elf_Internal_Sym *isym; 876 877 r_symndx = ELF64_R_SYM (rel->r_info); 878 879 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) 880 { 881 /* xgettext:c-format */ 882 _bfd_error_handler (_("%pB: bad symbol index: %d"), 883 abfd, r_symndx); 884 return FALSE; 885 } 886 887 if (r_symndx < symtab_hdr->sh_info) 888 { 889 /* A local symbol. */ 890 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 891 abfd, r_symndx); 892 if (isym == NULL) 893 return FALSE; 894 895 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 896 { 897 struct plt_entry *plt; 898 899 if (htab->elf.dynobj == NULL) 900 htab->elf.dynobj = abfd; 901 902 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) 903 return FALSE; 904 905 if (local_got_refcounts == NULL) 906 { 907 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr)) 908 return FALSE; 909 local_got_refcounts = elf_local_got_refcounts (abfd); 910 } 911 plt = elf_s390_local_plt (abfd); 912 plt[r_symndx].plt.refcount++; 913 } 914 h = NULL; 915 } 916 else 917 { 918 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 919 while (h->root.type == bfd_link_hash_indirect 920 || h->root.type == bfd_link_hash_warning) 921 h = (struct elf_link_hash_entry *) h->root.u.i.link; 922 } 923 924 /* Create got section and local_got_refcounts array if they 925 are needed. */ 926 r_type = elf_s390_tls_transition (info, 927 ELF64_R_TYPE (rel->r_info), 928 h == NULL); 929 switch (r_type) 930 { 931 case R_390_GOT12: 932 case R_390_GOT16: 933 case R_390_GOT20: 934 case R_390_GOT32: 935 case R_390_GOT64: 936 case R_390_GOTENT: 937 case R_390_GOTPLT12: 938 case R_390_GOTPLT16: 939 case R_390_GOTPLT20: 940 case R_390_GOTPLT32: 941 case R_390_GOTPLT64: 942 case R_390_GOTPLTENT: 943 case R_390_TLS_GD64: 944 case R_390_TLS_GOTIE12: 945 case R_390_TLS_GOTIE20: 946 case R_390_TLS_GOTIE64: 947 case R_390_TLS_IEENT: 948 case R_390_TLS_IE64: 949 case R_390_TLS_LDM64: 950 if (h == NULL 951 && local_got_refcounts == NULL) 952 { 953 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr)) 954 return FALSE; 955 local_got_refcounts = elf_local_got_refcounts (abfd); 956 } 957 958 /* Fall through. */ 959 case R_390_GOTOFF16: 960 case R_390_GOTOFF32: 961 case R_390_GOTOFF64: 962 case R_390_GOTPC: 963 case R_390_GOTPCDBL: 964 if (htab->elf.sgot == NULL) 965 { 966 if (htab->elf.dynobj == NULL) 967 htab->elf.dynobj = abfd; 968 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) 969 return FALSE; 970 } 971 } 972 973 if (h != NULL) 974 { 975 if (htab->elf.dynobj == NULL) 976 htab->elf.dynobj = abfd; 977 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) 978 return FALSE; 979 980 /* Make sure an IFUNC symbol defined in a non-shared object 981 always gets a PLT slot. */ 982 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 983 { 984 /* The symbol is called by the dynamic loader in order 985 to resolve the relocation. So it is in fact also 986 referenced. */ 987 h->ref_regular = 1; 988 h->needs_plt = 1; 989 } 990 } 991 992 switch (r_type) 993 { 994 case R_390_GOTPC: 995 case R_390_GOTPCDBL: 996 /* These relocs do not need a GOT slot. They just load the 997 GOT pointer itself or address something else relative to 998 the GOT. Since the GOT pointer has been set up above we 999 are done. */ 1000 break; 1001 case R_390_GOTOFF16: 1002 case R_390_GOTOFF32: 1003 case R_390_GOTOFF64: 1004 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular) 1005 break; 1006 /* Fall through. */ 1007 1008 case R_390_PLT12DBL: 1009 case R_390_PLT16DBL: 1010 case R_390_PLT24DBL: 1011 case R_390_PLT32: 1012 case R_390_PLT32DBL: 1013 case R_390_PLT64: 1014 case R_390_PLTOFF16: 1015 case R_390_PLTOFF32: 1016 case R_390_PLTOFF64: 1017 /* This symbol requires a procedure linkage table entry. We 1018 actually build the entry in adjust_dynamic_symbol, 1019 because this might be a case of linking PIC code which is 1020 never referenced by a dynamic object, in which case we 1021 don't need to generate a procedure linkage table entry 1022 after all. */ 1023 1024 /* If this is a local symbol, we resolve it directly without 1025 creating a procedure linkage table entry. */ 1026 if (h != NULL) 1027 { 1028 h->needs_plt = 1; 1029 h->plt.refcount += 1; 1030 } 1031 break; 1032 1033 case R_390_GOTPLT12: 1034 case R_390_GOTPLT16: 1035 case R_390_GOTPLT20: 1036 case R_390_GOTPLT32: 1037 case R_390_GOTPLT64: 1038 case R_390_GOTPLTENT: 1039 /* This symbol requires either a procedure linkage table entry 1040 or an entry in the local got. We actually build the entry 1041 in adjust_dynamic_symbol because whether this is really a 1042 global reference can change and with it the fact if we have 1043 to create a plt entry or a local got entry. To be able to 1044 make a once global symbol a local one we have to keep track 1045 of the number of gotplt references that exist for this 1046 symbol. */ 1047 if (h != NULL) 1048 { 1049 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; 1050 h->needs_plt = 1; 1051 h->plt.refcount += 1; 1052 } 1053 else 1054 local_got_refcounts[r_symndx] += 1; 1055 break; 1056 1057 case R_390_TLS_LDM64: 1058 htab->tls_ldm_got.refcount += 1; 1059 break; 1060 1061 case R_390_TLS_IE64: 1062 case R_390_TLS_GOTIE12: 1063 case R_390_TLS_GOTIE20: 1064 case R_390_TLS_GOTIE64: 1065 case R_390_TLS_IEENT: 1066 if (bfd_link_pic (info)) 1067 info->flags |= DF_STATIC_TLS; 1068 /* Fall through */ 1069 1070 case R_390_GOT12: 1071 case R_390_GOT16: 1072 case R_390_GOT20: 1073 case R_390_GOT32: 1074 case R_390_GOT64: 1075 case R_390_GOTENT: 1076 case R_390_TLS_GD64: 1077 /* This symbol requires a global offset table entry. */ 1078 switch (r_type) 1079 { 1080 default: 1081 case R_390_GOT12: 1082 case R_390_GOT16: 1083 case R_390_GOT20: 1084 case R_390_GOT32: 1085 case R_390_GOTENT: 1086 tls_type = GOT_NORMAL; 1087 break; 1088 case R_390_TLS_GD64: 1089 tls_type = GOT_TLS_GD; 1090 break; 1091 case R_390_TLS_IE64: 1092 case R_390_TLS_GOTIE64: 1093 tls_type = GOT_TLS_IE; 1094 break; 1095 case R_390_TLS_GOTIE12: 1096 case R_390_TLS_GOTIE20: 1097 case R_390_TLS_IEENT: 1098 tls_type = GOT_TLS_IE_NLT; 1099 break; 1100 } 1101 1102 if (h != NULL) 1103 { 1104 h->got.refcount += 1; 1105 old_tls_type = elf_s390_hash_entry(h)->tls_type; 1106 } 1107 else 1108 { 1109 local_got_refcounts[r_symndx] += 1; 1110 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; 1111 } 1112 /* If a TLS symbol is accessed using IE at least once, 1113 there is no point to use dynamic model for it. */ 1114 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) 1115 { 1116 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) 1117 { 1118 _bfd_error_handler 1119 /* xgettext:c-format */ 1120 (_("%pB: `%s' accessed both as normal and thread local symbol"), 1121 abfd, h->root.root.string); 1122 return FALSE; 1123 } 1124 if (old_tls_type > tls_type) 1125 tls_type = old_tls_type; 1126 } 1127 1128 if (old_tls_type != tls_type) 1129 { 1130 if (h != NULL) 1131 elf_s390_hash_entry (h)->tls_type = tls_type; 1132 else 1133 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; 1134 } 1135 1136 if (r_type != R_390_TLS_IE64) 1137 break; 1138 /* Fall through */ 1139 1140 case R_390_TLS_LE64: 1141 /* For static linking and executables this reloc will be 1142 calculated at linktime otherwise a TLS_TPOFF runtime 1143 reloc will be generated. */ 1144 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info)) 1145 break; 1146 1147 if (!bfd_link_pic (info)) 1148 break; 1149 info->flags |= DF_STATIC_TLS; 1150 /* Fall through */ 1151 1152 case R_390_8: 1153 case R_390_16: 1154 case R_390_32: 1155 case R_390_64: 1156 case R_390_PC12DBL: 1157 case R_390_PC16: 1158 case R_390_PC16DBL: 1159 case R_390_PC24DBL: 1160 case R_390_PC32: 1161 case R_390_PC32DBL: 1162 case R_390_PC64: 1163 if (h != NULL && bfd_link_executable (info)) 1164 { 1165 /* If this reloc is in a read-only section, we might 1166 need a copy reloc. We can't check reliably at this 1167 stage whether the section is read-only, as input 1168 sections have not yet been mapped to output sections. 1169 Tentatively set the flag for now, and correct in 1170 adjust_dynamic_symbol. */ 1171 h->non_got_ref = 1; 1172 1173 if (!bfd_link_pic (info)) 1174 { 1175 /* We may need a .plt entry if the function this reloc 1176 refers to is in a shared lib. */ 1177 h->plt.refcount += 1; 1178 } 1179 } 1180 1181 /* If we are creating a shared library, and this is a reloc 1182 against a global symbol, or a non PC relative reloc 1183 against a local symbol, then we need to copy the reloc 1184 into the shared library. However, if we are linking with 1185 -Bsymbolic, we do not need to copy a reloc against a 1186 global symbol which is defined in an object we are 1187 including in the link (i.e., DEF_REGULAR is set). At 1188 this point we have not seen all the input files, so it is 1189 possible that DEF_REGULAR is not set now but will be set 1190 later (it is never cleared). In case of a weak definition, 1191 DEF_REGULAR may be cleared later by a strong definition in 1192 a shared library. We account for that possibility below by 1193 storing information in the relocs_copied field of the hash 1194 table entry. A similar situation occurs when creating 1195 shared libraries and symbol visibility changes render the 1196 symbol local. 1197 1198 If on the other hand, we are creating an executable, we 1199 may need to keep relocations for symbols satisfied by a 1200 dynamic library if we manage to avoid copy relocs for the 1201 symbol. */ 1202 if ((bfd_link_pic (info) 1203 && (sec->flags & SEC_ALLOC) != 0 1204 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16 1205 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL 1206 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL 1207 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL 1208 && ELF64_R_TYPE (rel->r_info) != R_390_PC32 1209 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL 1210 && ELF64_R_TYPE (rel->r_info) != R_390_PC64) 1211 || (h != NULL 1212 && (! SYMBOLIC_BIND (info, h) 1213 || h->root.type == bfd_link_hash_defweak 1214 || !h->def_regular)))) 1215 || (ELIMINATE_COPY_RELOCS 1216 && !bfd_link_pic (info) 1217 && (sec->flags & SEC_ALLOC) != 0 1218 && h != NULL 1219 && (h->root.type == bfd_link_hash_defweak 1220 || !h->def_regular))) 1221 { 1222 struct elf_dyn_relocs *p; 1223 struct elf_dyn_relocs **head; 1224 1225 /* We must copy these reloc types into the output file. 1226 Create a reloc section in dynobj and make room for 1227 this reloc. */ 1228 if (sreloc == NULL) 1229 { 1230 if (htab->elf.dynobj == NULL) 1231 htab->elf.dynobj = abfd; 1232 1233 sreloc = _bfd_elf_make_dynamic_reloc_section 1234 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE); 1235 1236 if (sreloc == NULL) 1237 return FALSE; 1238 } 1239 1240 /* If this is a global symbol, we count the number of 1241 relocations we need for this symbol. */ 1242 if (h != NULL) 1243 { 1244 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; 1245 } 1246 else 1247 { 1248 /* Track dynamic relocs needed for local syms too. 1249 We really need local syms available to do this 1250 easily. Oh well. */ 1251 asection *s; 1252 void *vpp; 1253 1254 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 1255 abfd, r_symndx); 1256 if (isym == NULL) 1257 return FALSE; 1258 1259 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 1260 if (s == NULL) 1261 s = sec; 1262 1263 vpp = &elf_section_data (s)->local_dynrel; 1264 head = (struct elf_dyn_relocs **) vpp; 1265 } 1266 1267 p = *head; 1268 if (p == NULL || p->sec != sec) 1269 { 1270 bfd_size_type amt = sizeof *p; 1271 p = ((struct elf_dyn_relocs *) 1272 bfd_alloc (htab->elf.dynobj, amt)); 1273 if (p == NULL) 1274 return FALSE; 1275 p->next = *head; 1276 *head = p; 1277 p->sec = sec; 1278 p->count = 0; 1279 p->pc_count = 0; 1280 } 1281 1282 p->count += 1; 1283 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16 1284 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL 1285 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL 1286 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL 1287 || ELF64_R_TYPE (rel->r_info) == R_390_PC32 1288 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL 1289 || ELF64_R_TYPE (rel->r_info) == R_390_PC64) 1290 p->pc_count += 1; 1291 } 1292 break; 1293 1294 /* This relocation describes the C++ object vtable hierarchy. 1295 Reconstruct it for later use during GC. */ 1296 case R_390_GNU_VTINHERIT: 1297 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1298 return FALSE; 1299 break; 1300 1301 /* This relocation describes which C++ vtable entries are actually 1302 used. Record for later use during GC. */ 1303 case R_390_GNU_VTENTRY: 1304 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1305 return FALSE; 1306 break; 1307 1308 default: 1309 break; 1310 } 1311 } 1312 1313 return TRUE; 1314 } 1315 1316 /* Return the section that should be marked against GC for a given 1317 relocation. */ 1318 1319 static asection * 1320 elf_s390_gc_mark_hook (asection *sec, 1321 struct bfd_link_info *info, 1322 Elf_Internal_Rela *rel, 1323 struct elf_link_hash_entry *h, 1324 Elf_Internal_Sym *sym) 1325 { 1326 if (h != NULL) 1327 switch (ELF64_R_TYPE (rel->r_info)) 1328 { 1329 case R_390_GNU_VTINHERIT: 1330 case R_390_GNU_VTENTRY: 1331 return NULL; 1332 } 1333 1334 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1335 } 1336 1337 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT 1338 entry but we found we will not create any. Called when we find we will 1339 not have any PLT for this symbol, by for example 1340 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, 1341 or elf_s390_size_dynamic_sections if no dynamic sections will be 1342 created (we're only linking static objects). */ 1343 1344 static void 1345 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h) 1346 { 1347 if (h->elf.root.type == bfd_link_hash_warning) 1348 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; 1349 1350 if (h->gotplt_refcount <= 0) 1351 return; 1352 1353 /* We simply add the number of gotplt references to the number 1354 * of got references for this symbol. */ 1355 h->elf.got.refcount += h->gotplt_refcount; 1356 h->gotplt_refcount = -1; 1357 } 1358 1359 /* Find dynamic relocs for H that apply to read-only sections. */ 1360 1361 static asection * 1362 readonly_dynrelocs (struct elf_link_hash_entry *h) 1363 { 1364 struct elf_dyn_relocs *p; 1365 1366 for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) 1367 { 1368 asection *s = p->sec->output_section; 1369 1370 if (s != NULL && (s->flags & SEC_READONLY) != 0) 1371 return p->sec; 1372 } 1373 return NULL; 1374 } 1375 1376 /* Adjust a symbol defined by a dynamic object and referenced by a 1377 regular object. The current definition is in some section of the 1378 dynamic object, but we're not including those sections. We have to 1379 change the definition to something the rest of the link can 1380 understand. */ 1381 1382 static bfd_boolean 1383 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info, 1384 struct elf_link_hash_entry *h) 1385 { 1386 struct elf_s390_link_hash_table *htab; 1387 asection *s, *srel; 1388 1389 /* STT_GNU_IFUNC symbol must go through PLT. */ 1390 if (s390_is_ifunc_symbol_p (h)) 1391 { 1392 /* All local STT_GNU_IFUNC references must be treated as local 1393 calls via local PLT. */ 1394 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h)) 1395 { 1396 bfd_size_type pc_count = 0, count = 0; 1397 struct elf_dyn_relocs **pp; 1398 struct elf_s390_link_hash_entry *eh; 1399 struct elf_dyn_relocs *p; 1400 1401 eh = (struct elf_s390_link_hash_entry *) h; 1402 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 1403 { 1404 pc_count += p->pc_count; 1405 p->count -= p->pc_count; 1406 p->pc_count = 0; 1407 count += p->count; 1408 if (p->count == 0) 1409 *pp = p->next; 1410 else 1411 pp = &p->next; 1412 } 1413 1414 if (pc_count || count) 1415 { 1416 h->needs_plt = 1; 1417 h->non_got_ref = 1; 1418 if (h->plt.refcount <= 0) 1419 h->plt.refcount = 1; 1420 else 1421 h->plt.refcount += 1; 1422 } 1423 } 1424 1425 if (h->plt.refcount <= 0) 1426 { 1427 h->plt.offset = (bfd_vma) -1; 1428 h->needs_plt = 0; 1429 } 1430 return TRUE; 1431 } 1432 1433 /* If this is a function, put it in the procedure linkage table. We 1434 will fill in the contents of the procedure linkage table later 1435 (although we could actually do it here). */ 1436 if (h->type == STT_FUNC 1437 || h->needs_plt) 1438 { 1439 if (h->plt.refcount <= 0 1440 || SYMBOL_CALLS_LOCAL (info, h) 1441 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) 1442 { 1443 /* This case can occur if we saw a PLT32 reloc in an input 1444 file, but the symbol was never referred to by a dynamic 1445 object, or if all references were garbage collected. In 1446 such a case, we don't actually need to build a procedure 1447 linkage table, and we can just do a PC32 reloc instead. */ 1448 h->plt.offset = (bfd_vma) -1; 1449 h->needs_plt = 0; 1450 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1451 } 1452 1453 return TRUE; 1454 } 1455 else 1456 /* It's possible that we incorrectly decided a .plt reloc was 1457 needed for an R_390_PC32 reloc to a non-function sym in 1458 check_relocs. We can't decide accurately between function and 1459 non-function syms in check-relocs; Objects loaded later in 1460 the link may change h->type. So fix it now. */ 1461 h->plt.offset = (bfd_vma) -1; 1462 1463 /* If this is a weak symbol, and there is a real definition, the 1464 processor independent code will have arranged for us to see the 1465 real definition first, and we can just use the same value. */ 1466 if (h->is_weakalias) 1467 { 1468 struct elf_link_hash_entry *def = weakdef (h); 1469 BFD_ASSERT (def->root.type == bfd_link_hash_defined); 1470 h->root.u.def.section = def->root.u.def.section; 1471 h->root.u.def.value = def->root.u.def.value; 1472 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) 1473 h->non_got_ref = def->non_got_ref; 1474 return TRUE; 1475 } 1476 1477 /* This is a reference to a symbol defined by a dynamic object which 1478 is not a function. */ 1479 1480 /* If we are creating a shared library, we must presume that the 1481 only references to the symbol are via the global offset table. 1482 For such cases we need not do anything here; the relocations will 1483 be handled correctly by relocate_section. */ 1484 if (bfd_link_pic (info)) 1485 return TRUE; 1486 1487 /* If there are no references to this symbol that do not use the 1488 GOT, we don't need to generate a copy reloc. */ 1489 if (!h->non_got_ref) 1490 return TRUE; 1491 1492 /* If -z nocopyreloc was given, we won't generate them either. */ 1493 if (info->nocopyreloc) 1494 { 1495 h->non_got_ref = 0; 1496 return TRUE; 1497 } 1498 1499 /* If we don't find any dynamic relocs in read-only sections, then 1500 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 1501 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h)) 1502 { 1503 h->non_got_ref = 0; 1504 return TRUE; 1505 } 1506 1507 /* We must allocate the symbol in our .dynbss section, which will 1508 become part of the .bss section of the executable. There will be 1509 an entry for this symbol in the .dynsym section. The dynamic 1510 object will contain position independent code, so all references 1511 from the dynamic object to this symbol will go through the global 1512 offset table. The dynamic linker will use the .dynsym entry to 1513 determine the address it must put in the global offset table, so 1514 both the dynamic object and the regular object will refer to the 1515 same memory location for the variable. */ 1516 1517 htab = elf_s390_hash_table (info); 1518 if (htab == NULL) 1519 return FALSE; 1520 1521 /* We must generate a R_390_COPY reloc to tell the dynamic linker to 1522 copy the initial value out of the dynamic object and into the 1523 runtime process image. */ 1524 if ((h->root.u.def.section->flags & SEC_READONLY) != 0) 1525 { 1526 s = htab->elf.sdynrelro; 1527 srel = htab->elf.sreldynrelro; 1528 } 1529 else 1530 { 1531 s = htab->elf.sdynbss; 1532 srel = htab->elf.srelbss; 1533 } 1534 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 1535 { 1536 srel->size += sizeof (Elf64_External_Rela); 1537 h->needs_copy = 1; 1538 } 1539 1540 return _bfd_elf_adjust_dynamic_copy (info, h, s); 1541 } 1542 1543 /* Allocate space in .plt, .got and associated reloc sections for 1544 dynamic relocs. */ 1545 1546 static bfd_boolean 1547 allocate_dynrelocs (struct elf_link_hash_entry *h, 1548 void * inf) 1549 { 1550 struct bfd_link_info *info; 1551 struct elf_s390_link_hash_table *htab; 1552 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h; 1553 struct elf_dyn_relocs *p; 1554 1555 if (h->root.type == bfd_link_hash_indirect) 1556 return TRUE; 1557 1558 info = (struct bfd_link_info *) inf; 1559 htab = elf_s390_hash_table (info); 1560 if (htab == NULL) 1561 return FALSE; 1562 1563 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it 1564 here if it is defined and referenced in a non-shared object. */ 1565 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 1566 return s390_elf_allocate_ifunc_dyn_relocs (info, h); 1567 else if (htab->elf.dynamic_sections_created 1568 && h->plt.refcount > 0) 1569 { 1570 /* Make sure this symbol is output as a dynamic symbol. 1571 Undefined weak syms won't yet be marked as dynamic. */ 1572 if (h->dynindx == -1 1573 && !h->forced_local) 1574 { 1575 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1576 return FALSE; 1577 } 1578 1579 if (bfd_link_pic (info) 1580 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) 1581 { 1582 asection *s = htab->elf.splt; 1583 1584 /* If this is the first .plt entry, make room for the special 1585 first entry. */ 1586 if (s->size == 0) 1587 s->size += PLT_FIRST_ENTRY_SIZE; 1588 1589 h->plt.offset = s->size; 1590 1591 /* If this symbol is not defined in a regular file, and we are 1592 not generating a shared library, then set the symbol to this 1593 location in the .plt. This is required to make function 1594 pointers compare as equal between the normal executable and 1595 the shared library. */ 1596 if (! bfd_link_pic (info) 1597 && !h->def_regular) 1598 { 1599 h->root.u.def.section = s; 1600 h->root.u.def.value = h->plt.offset; 1601 } 1602 1603 /* Make room for this entry. */ 1604 s->size += PLT_ENTRY_SIZE; 1605 1606 /* We also need to make an entry in the .got.plt section. */ 1607 htab->elf.sgotplt->size += GOT_ENTRY_SIZE; 1608 1609 /* We also need to make an entry in the .rela.plt section. */ 1610 htab->elf.srelplt->size += sizeof (Elf64_External_Rela); 1611 } 1612 else 1613 { 1614 h->plt.offset = (bfd_vma) -1; 1615 h->needs_plt = 0; 1616 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1617 } 1618 } 1619 else 1620 { 1621 h->plt.offset = (bfd_vma) -1; 1622 h->needs_plt = 0; 1623 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1624 } 1625 1626 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to 1627 the binary, we can optimize a bit. IE64 and GOTIE64 get converted 1628 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT 1629 we can save the dynamic TLS relocation. */ 1630 if (h->got.refcount > 0 1631 && !bfd_link_pic (info) 1632 && h->dynindx == -1 1633 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) 1634 { 1635 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) 1636 /* For the GOTIE access without a literal pool entry the offset has 1637 to be stored somewhere. The immediate value in the instruction 1638 is not bit enough so the value is stored in the got. */ 1639 { 1640 h->got.offset = htab->elf.sgot->size; 1641 htab->elf.sgot->size += GOT_ENTRY_SIZE; 1642 } 1643 else 1644 h->got.offset = (bfd_vma) -1; 1645 } 1646 else if (h->got.refcount > 0) 1647 { 1648 asection *s; 1649 bfd_boolean dyn; 1650 int tls_type = elf_s390_hash_entry(h)->tls_type; 1651 1652 /* Make sure this symbol is output as a dynamic symbol. 1653 Undefined weak syms won't yet be marked as dynamic. */ 1654 if (h->dynindx == -1 1655 && !h->forced_local) 1656 { 1657 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1658 return FALSE; 1659 } 1660 1661 s = htab->elf.sgot; 1662 h->got.offset = s->size; 1663 s->size += GOT_ENTRY_SIZE; 1664 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */ 1665 if (tls_type == GOT_TLS_GD) 1666 s->size += GOT_ENTRY_SIZE; 1667 dyn = htab->elf.dynamic_sections_created; 1668 /* R_390_TLS_IE64 needs one dynamic relocation, 1669 R_390_TLS_GD64 needs one if local symbol and two if global. */ 1670 if ((tls_type == GOT_TLS_GD && h->dynindx == -1) 1671 || tls_type >= GOT_TLS_IE) 1672 htab->elf.srelgot->size += sizeof (Elf64_External_Rela); 1673 else if (tls_type == GOT_TLS_GD) 1674 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela); 1675 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h) 1676 && (bfd_link_pic (info) 1677 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) 1678 htab->elf.srelgot->size += sizeof (Elf64_External_Rela); 1679 } 1680 else 1681 h->got.offset = (bfd_vma) -1; 1682 1683 if (eh->dyn_relocs == NULL) 1684 return TRUE; 1685 1686 /* In the shared -Bsymbolic case, discard space allocated for 1687 dynamic pc-relative relocs against symbols which turn out to be 1688 defined in regular objects. For the normal shared case, discard 1689 space for pc-relative relocs that have become local due to symbol 1690 visibility changes. */ 1691 1692 if (bfd_link_pic (info)) 1693 { 1694 if (SYMBOL_CALLS_LOCAL (info, h)) 1695 { 1696 struct elf_dyn_relocs **pp; 1697 1698 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 1699 { 1700 p->count -= p->pc_count; 1701 p->pc_count = 0; 1702 if (p->count == 0) 1703 *pp = p->next; 1704 else 1705 pp = &p->next; 1706 } 1707 } 1708 1709 /* Also discard relocs on undefined weak syms with non-default 1710 visibility. */ 1711 if (eh->dyn_relocs != NULL 1712 && h->root.type == bfd_link_hash_undefweak) 1713 { 1714 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 1715 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) 1716 eh->dyn_relocs = NULL; 1717 1718 /* Make sure undefined weak symbols are output as a dynamic 1719 symbol in PIEs. */ 1720 else if (h->dynindx == -1 1721 && !h->forced_local) 1722 { 1723 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1724 return FALSE; 1725 } 1726 } 1727 } 1728 else if (ELIMINATE_COPY_RELOCS) 1729 { 1730 /* For the non-shared case, discard space for relocs against 1731 symbols which turn out to need copy relocs or are not 1732 dynamic. */ 1733 1734 if (!h->non_got_ref 1735 && ((h->def_dynamic 1736 && !h->def_regular) 1737 || (htab->elf.dynamic_sections_created 1738 && (h->root.type == bfd_link_hash_undefweak 1739 || h->root.type == bfd_link_hash_undefined)))) 1740 { 1741 /* Make sure this symbol is output as a dynamic symbol. 1742 Undefined weak syms won't yet be marked as dynamic. */ 1743 if (h->dynindx == -1 1744 && !h->forced_local) 1745 { 1746 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1747 return FALSE; 1748 } 1749 1750 /* If that succeeded, we know we'll be keeping all the 1751 relocs. */ 1752 if (h->dynindx != -1) 1753 goto keep; 1754 } 1755 1756 eh->dyn_relocs = NULL; 1757 1758 keep: ; 1759 } 1760 1761 /* Finally, allocate space. */ 1762 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1763 { 1764 asection *sreloc = elf_section_data (p->sec)->sreloc; 1765 sreloc->size += p->count * sizeof (Elf64_External_Rela); 1766 } 1767 1768 return TRUE; 1769 } 1770 1771 /* Set DF_TEXTREL if we find any dynamic relocs that apply to 1772 read-only sections. */ 1773 1774 static bfd_boolean 1775 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p) 1776 { 1777 asection *sec; 1778 1779 if (h->root.type == bfd_link_hash_indirect) 1780 return TRUE; 1781 1782 sec = readonly_dynrelocs (h); 1783 if (sec != NULL) 1784 { 1785 struct bfd_link_info *info = (struct bfd_link_info *) info_p; 1786 1787 info->flags |= DF_TEXTREL; 1788 info->callbacks->minfo 1789 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"), 1790 sec->owner, h->root.root.string, sec); 1791 1792 /* Not an error, just cut short the traversal. */ 1793 return FALSE; 1794 } 1795 return TRUE; 1796 } 1797 1798 /* Set the sizes of the dynamic sections. */ 1799 1800 static bfd_boolean 1801 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 1802 struct bfd_link_info *info) 1803 { 1804 struct elf_s390_link_hash_table *htab; 1805 bfd *dynobj; 1806 asection *s; 1807 bfd_boolean relocs; 1808 bfd *ibfd; 1809 1810 htab = elf_s390_hash_table (info); 1811 if (htab == NULL) 1812 return FALSE; 1813 1814 dynobj = htab->elf.dynobj; 1815 if (dynobj == NULL) 1816 abort (); 1817 1818 if (htab->elf.dynamic_sections_created) 1819 { 1820 /* Set the contents of the .interp section to the interpreter. */ 1821 if (bfd_link_executable (info) && !info->nointerp) 1822 { 1823 s = bfd_get_linker_section (dynobj, ".interp"); 1824 if (s == NULL) 1825 abort (); 1826 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 1827 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 1828 } 1829 } 1830 1831 if (htab->elf.sgot && s390_gotplt_after_got_p (info)) 1832 { 1833 /* _bfd_elf_create_got_section adds the got header size always 1834 to .got.plt but we need it in .got if this section comes 1835 first. */ 1836 htab->elf.sgot->size += 3 * GOT_ENTRY_SIZE; 1837 htab->elf.sgotplt->size -= 3 * GOT_ENTRY_SIZE; 1838 1839 /* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got 1840 instead of .got.plt. */ 1841 htab->elf.hgot->root.u.def.section = htab->elf.sgot; 1842 htab->elf.hgot->root.u.def.value = 0; 1843 } 1844 1845 /* Set up .got offsets for local syms, and space for local dynamic 1846 relocs. */ 1847 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 1848 { 1849 bfd_signed_vma *local_got; 1850 bfd_signed_vma *end_local_got; 1851 char *local_tls_type; 1852 bfd_size_type locsymcount; 1853 Elf_Internal_Shdr *symtab_hdr; 1854 asection *srela; 1855 struct plt_entry *local_plt; 1856 unsigned int i; 1857 1858 if (! is_s390_elf (ibfd)) 1859 continue; 1860 1861 for (s = ibfd->sections; s != NULL; s = s->next) 1862 { 1863 struct elf_dyn_relocs *p; 1864 1865 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) 1866 { 1867 if (!bfd_is_abs_section (p->sec) 1868 && bfd_is_abs_section (p->sec->output_section)) 1869 { 1870 /* Input section has been discarded, either because 1871 it is a copy of a linkonce section or due to 1872 linker script /DISCARD/, so we'll be discarding 1873 the relocs too. */ 1874 } 1875 else if (p->count != 0) 1876 { 1877 srela = elf_section_data (p->sec)->sreloc; 1878 srela->size += p->count * sizeof (Elf64_External_Rela); 1879 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 1880 info->flags |= DF_TEXTREL; 1881 } 1882 } 1883 } 1884 1885 local_got = elf_local_got_refcounts (ibfd); 1886 if (!local_got) 1887 continue; 1888 1889 symtab_hdr = &elf_symtab_hdr (ibfd); 1890 locsymcount = symtab_hdr->sh_info; 1891 end_local_got = local_got + locsymcount; 1892 local_tls_type = elf_s390_local_got_tls_type (ibfd); 1893 s = htab->elf.sgot; 1894 srela = htab->elf.srelgot; 1895 for (; local_got < end_local_got; ++local_got, ++local_tls_type) 1896 { 1897 if (*local_got > 0) 1898 { 1899 *local_got = s->size; 1900 s->size += GOT_ENTRY_SIZE; 1901 if (*local_tls_type == GOT_TLS_GD) 1902 s->size += GOT_ENTRY_SIZE; 1903 if (bfd_link_pic (info)) 1904 srela->size += sizeof (Elf64_External_Rela); 1905 } 1906 else 1907 *local_got = (bfd_vma) -1; 1908 } 1909 1910 local_plt = elf_s390_local_plt (ibfd); 1911 for (i = 0; i < symtab_hdr->sh_info; i++) 1912 { 1913 if (local_plt[i].plt.refcount > 0) 1914 { 1915 local_plt[i].plt.offset = htab->elf.iplt->size; 1916 htab->elf.iplt->size += PLT_ENTRY_SIZE; 1917 htab->elf.igotplt->size += GOT_ENTRY_SIZE; 1918 htab->elf.irelplt->size += sizeof (Elf64_External_Rela); 1919 } 1920 else 1921 local_plt[i].plt.offset = (bfd_vma) -1; 1922 } 1923 } 1924 1925 if (htab->tls_ldm_got.refcount > 0) 1926 { 1927 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64 1928 relocs. */ 1929 htab->tls_ldm_got.offset = htab->elf.sgot->size; 1930 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; 1931 htab->elf.srelgot->size += sizeof (Elf64_External_Rela); 1932 } 1933 else 1934 htab->tls_ldm_got.offset = -1; 1935 1936 /* Allocate global sym .plt and .got entries, and space for global 1937 sym dynamic relocs. */ 1938 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); 1939 1940 /* We now have determined the sizes of the various dynamic sections. 1941 Allocate memory for them. */ 1942 relocs = FALSE; 1943 for (s = dynobj->sections; s != NULL; s = s->next) 1944 { 1945 if ((s->flags & SEC_LINKER_CREATED) == 0) 1946 continue; 1947 1948 if (s == htab->elf.splt 1949 || s == htab->elf.sgot 1950 || s == htab->elf.sgotplt 1951 || s == htab->elf.sdynbss 1952 || s == htab->elf.sdynrelro 1953 || s == htab->elf.iplt 1954 || s == htab->elf.igotplt 1955 || s == htab->irelifunc) 1956 { 1957 /* Strip this section if we don't need it; see the 1958 comment below. */ 1959 } 1960 else if (CONST_STRNEQ (bfd_section_name (s), ".rela")) 1961 { 1962 if (s->size != 0 && s != htab->elf.srelplt) 1963 relocs = TRUE; 1964 1965 /* We use the reloc_count field as a counter if we need 1966 to copy relocs into the output file. */ 1967 s->reloc_count = 0; 1968 } 1969 else 1970 { 1971 /* It's not one of our sections, so don't allocate space. */ 1972 continue; 1973 } 1974 1975 if (s->size == 0) 1976 { 1977 /* If we don't need this section, strip it from the 1978 output file. This is to handle .rela.bss and 1979 .rela.plt. We must create it in 1980 create_dynamic_sections, because it must be created 1981 before the linker maps input sections to output 1982 sections. The linker does that before 1983 adjust_dynamic_symbol is called, and it is that 1984 function which decides whether anything needs to go 1985 into these sections. */ 1986 1987 s->flags |= SEC_EXCLUDE; 1988 continue; 1989 } 1990 1991 if ((s->flags & SEC_HAS_CONTENTS) == 0) 1992 continue; 1993 1994 /* Allocate memory for the section contents. We use bfd_zalloc 1995 here in case unused entries are not reclaimed before the 1996 section's contents are written out. This should not happen, 1997 but this way if it does, we get a R_390_NONE reloc instead 1998 of garbage. */ 1999 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 2000 if (s->contents == NULL) 2001 return FALSE; 2002 } 2003 2004 if (htab->elf.dynamic_sections_created) 2005 { 2006 /* Add some entries to the .dynamic section. We fill in the 2007 values later, in elf_s390_finish_dynamic_sections, but we 2008 must add the entries now so that we get the correct size for 2009 the .dynamic section. The DT_DEBUG entry is filled in by the 2010 dynamic linker and used by the debugger. */ 2011 #define add_dynamic_entry(TAG, VAL) \ 2012 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2013 2014 if (bfd_link_executable (info)) 2015 { 2016 if (!add_dynamic_entry (DT_DEBUG, 0)) 2017 return FALSE; 2018 } 2019 2020 if (htab->elf.splt->size != 0) 2021 { 2022 if (!add_dynamic_entry (DT_PLTGOT, 0) 2023 || !add_dynamic_entry (DT_PLTRELSZ, 0) 2024 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 2025 || !add_dynamic_entry (DT_JMPREL, 0)) 2026 return FALSE; 2027 } 2028 2029 if (relocs) 2030 { 2031 if (!add_dynamic_entry (DT_RELA, 0) 2032 || !add_dynamic_entry (DT_RELASZ, 0) 2033 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) 2034 return FALSE; 2035 2036 /* If any dynamic relocs apply to a read-only section, 2037 then we need a DT_TEXTREL entry. */ 2038 if ((info->flags & DF_TEXTREL) == 0) 2039 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info); 2040 2041 if ((info->flags & DF_TEXTREL) != 0) 2042 { 2043 if (!add_dynamic_entry (DT_TEXTREL, 0)) 2044 return FALSE; 2045 } 2046 } 2047 } 2048 #undef add_dynamic_entry 2049 2050 return TRUE; 2051 } 2052 2053 /* Return the base VMA address which should be subtracted from real addresses 2054 when resolving @dtpoff relocation. 2055 This is PT_TLS segment p_vaddr. */ 2056 2057 static bfd_vma 2058 dtpoff_base (struct bfd_link_info *info) 2059 { 2060 /* If tls_sec is NULL, we should have signalled an error already. */ 2061 if (elf_hash_table (info)->tls_sec == NULL) 2062 return 0; 2063 return elf_hash_table (info)->tls_sec->vma; 2064 } 2065 2066 /* Return the relocation value for @tpoff relocation 2067 if STT_TLS virtual address is ADDRESS. */ 2068 2069 static bfd_vma 2070 tpoff (struct bfd_link_info *info, bfd_vma address) 2071 { 2072 struct elf_link_hash_table *htab = elf_hash_table (info); 2073 2074 /* If tls_sec is NULL, we should have signalled an error already. */ 2075 if (htab->tls_sec == NULL) 2076 return 0; 2077 return htab->tls_size + htab->tls_sec->vma - address; 2078 } 2079 2080 /* Complain if TLS instruction relocation is against an invalid 2081 instruction. */ 2082 2083 static void 2084 invalid_tls_insn (bfd *input_bfd, 2085 asection *input_section, 2086 Elf_Internal_Rela *rel) 2087 { 2088 reloc_howto_type *howto; 2089 2090 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info); 2091 _bfd_error_handler 2092 /* xgettext:c-format */ 2093 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"), 2094 input_bfd, 2095 input_section, 2096 (uint64_t) rel->r_offset, 2097 howto->name); 2098 bfd_set_error (bfd_error_bad_value); 2099 } 2100 2101 /* Relocate a 390 ELF section. */ 2102 2103 static bfd_boolean 2104 elf_s390_relocate_section (bfd *output_bfd, 2105 struct bfd_link_info *info, 2106 bfd *input_bfd, 2107 asection *input_section, 2108 bfd_byte *contents, 2109 Elf_Internal_Rela *relocs, 2110 Elf_Internal_Sym *local_syms, 2111 asection **local_sections) 2112 { 2113 struct elf_s390_link_hash_table *htab; 2114 Elf_Internal_Shdr *symtab_hdr; 2115 struct elf_link_hash_entry **sym_hashes; 2116 bfd_vma *local_got_offsets; 2117 Elf_Internal_Rela *rel; 2118 Elf_Internal_Rela *relend; 2119 2120 if (!is_s390_elf (input_bfd)) 2121 { 2122 bfd_set_error (bfd_error_wrong_format); 2123 return FALSE; 2124 } 2125 2126 htab = elf_s390_hash_table (info); 2127 if (htab == NULL) 2128 return FALSE; 2129 2130 symtab_hdr = &elf_symtab_hdr (input_bfd); 2131 sym_hashes = elf_sym_hashes (input_bfd); 2132 local_got_offsets = elf_local_got_offsets (input_bfd); 2133 2134 rel = relocs; 2135 relend = relocs + input_section->reloc_count; 2136 for (; rel < relend; rel++) 2137 { 2138 unsigned int r_type; 2139 reloc_howto_type *howto; 2140 unsigned long r_symndx; 2141 struct elf_link_hash_entry *h; 2142 Elf_Internal_Sym *sym; 2143 asection *sec; 2144 bfd_vma off; 2145 bfd_vma relocation; 2146 bfd_boolean unresolved_reloc; 2147 bfd_reloc_status_type r; 2148 int tls_type; 2149 bfd_boolean resolved_to_zero; 2150 2151 r_type = ELF64_R_TYPE (rel->r_info); 2152 if (r_type == (int) R_390_GNU_VTINHERIT 2153 || r_type == (int) R_390_GNU_VTENTRY) 2154 continue; 2155 if (r_type >= (int) R_390_max) 2156 { 2157 bfd_set_error (bfd_error_bad_value); 2158 return FALSE; 2159 } 2160 2161 howto = elf_howto_table + r_type; 2162 r_symndx = ELF64_R_SYM (rel->r_info); 2163 2164 h = NULL; 2165 sym = NULL; 2166 sec = NULL; 2167 unresolved_reloc = FALSE; 2168 if (r_symndx < symtab_hdr->sh_info) 2169 { 2170 sym = local_syms + r_symndx; 2171 sec = local_sections[r_symndx]; 2172 2173 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 2174 { 2175 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd); 2176 if (local_plt == NULL) 2177 return FALSE; 2178 2179 /* Address of the PLT slot. */ 2180 relocation = (htab->elf.iplt->output_section->vma 2181 + htab->elf.iplt->output_offset 2182 + local_plt[r_symndx].plt.offset); 2183 2184 switch (r_type) 2185 { 2186 case R_390_PLTOFF16: 2187 case R_390_PLTOFF32: 2188 case R_390_PLTOFF64: 2189 relocation -= s390_got_pointer (info); 2190 break; 2191 case R_390_GOTPLT12: 2192 case R_390_GOTPLT16: 2193 case R_390_GOTPLT20: 2194 case R_390_GOTPLT32: 2195 case R_390_GOTPLT64: 2196 case R_390_GOTPLTENT: 2197 case R_390_GOT12: 2198 case R_390_GOT16: 2199 case R_390_GOT20: 2200 case R_390_GOT32: 2201 case R_390_GOT64: 2202 case R_390_GOTENT: 2203 { 2204 /* Write the PLT slot address into the GOT slot. */ 2205 bfd_put_64 (output_bfd, relocation, 2206 htab->elf.sgot->contents + 2207 local_got_offsets[r_symndx]); 2208 relocation = (local_got_offsets[r_symndx] + 2209 s390_got_offset (info)); 2210 2211 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) 2212 relocation += s390_got_pointer (info); 2213 break; 2214 } 2215 default: 2216 break; 2217 } 2218 /* The output section is needed later in 2219 finish_dynamic_section when creating the dynamic 2220 relocation. */ 2221 local_plt[r_symndx].sec = sec; 2222 goto do_relocation; 2223 } 2224 else 2225 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2226 } 2227 else 2228 { 2229 bfd_boolean warned ATTRIBUTE_UNUSED; 2230 bfd_boolean ignored ATTRIBUTE_UNUSED; 2231 2232 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 2233 r_symndx, symtab_hdr, sym_hashes, 2234 h, sec, relocation, 2235 unresolved_reloc, warned, ignored); 2236 } 2237 2238 if (sec != NULL && discarded_section (sec)) 2239 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2240 rel, 1, relend, howto, 0, contents); 2241 2242 if (bfd_link_relocatable (info)) 2243 continue; 2244 2245 resolved_to_zero = (h != NULL 2246 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); 2247 2248 switch (r_type) 2249 { 2250 case R_390_GOTPLT12: 2251 case R_390_GOTPLT16: 2252 case R_390_GOTPLT20: 2253 case R_390_GOTPLT32: 2254 case R_390_GOTPLT64: 2255 case R_390_GOTPLTENT: 2256 /* There are three cases for a GOTPLT relocation. 1) The 2257 relocation is against the jump slot entry of a plt that 2258 will get emitted to the output file. 2) The relocation 2259 is against the jump slot of a plt entry that has been 2260 removed. elf_s390_adjust_gotplt has created a GOT entry 2261 as replacement. 3) The relocation is against a local symbol. 2262 Cases 2) and 3) are the same as the GOT relocation code 2263 so we just have to test for case 1 and fall through for 2264 the other two. */ 2265 if (h != NULL && h->plt.offset != (bfd_vma) -1) 2266 { 2267 bfd_vma plt_index; 2268 2269 if (s390_is_ifunc_symbol_p (h)) 2270 { 2271 /* Entry indices of .iplt and .igot.plt match 2272 1:1. No magic PLT first entry here. */ 2273 plt_index = h->plt.offset / PLT_ENTRY_SIZE; 2274 relocation = (plt_index * GOT_ENTRY_SIZE 2275 + s390_gotplt_offset (info) 2276 + htab->elf.igotplt->output_offset); 2277 } 2278 else 2279 { 2280 plt_index = ((h->plt.offset - PLT_FIRST_ENTRY_SIZE) 2281 / PLT_ENTRY_SIZE); 2282 2283 relocation = (plt_index * GOT_ENTRY_SIZE 2284 + s390_gotplt_offset (info)); 2285 } 2286 if (r_type == R_390_GOTPLTENT) 2287 relocation += s390_got_pointer (info); 2288 unresolved_reloc = FALSE; 2289 break; 2290 } 2291 /* Fall through. */ 2292 2293 case R_390_GOT12: 2294 case R_390_GOT16: 2295 case R_390_GOT20: 2296 case R_390_GOT32: 2297 case R_390_GOT64: 2298 case R_390_GOTENT: 2299 /* Relocation is to the entry for this symbol in the global 2300 offset table. */ 2301 if (htab->elf.sgot == NULL) 2302 abort (); 2303 2304 if (h != NULL) 2305 { 2306 bfd_boolean dyn; 2307 2308 off = h->got.offset; 2309 dyn = htab->elf.dynamic_sections_created; 2310 2311 if (s390_is_ifunc_symbol_p (h)) 2312 { 2313 BFD_ASSERT (h->plt.offset != (bfd_vma) -1); 2314 if (off == (bfd_vma)-1) 2315 { 2316 /* No explicit GOT usage so redirect to the 2317 got.iplt slot. */ 2318 relocation = (s390_gotplt_offset (info) 2319 + htab->elf.igotplt->output_offset 2320 + (h->plt.offset / PLT_ENTRY_SIZE 2321 * GOT_ENTRY_SIZE)); 2322 2323 /* For @GOTENT the relocation is against the offset between 2324 the instruction and the symbols entry in the GOT and not 2325 between the start of the GOT and the symbols entry. We 2326 add the vma of the GOT to get the correct value. */ 2327 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) 2328 relocation += s390_got_pointer (info); 2329 2330 break; 2331 } 2332 else 2333 { 2334 /* Explicit GOT slots must contain the address 2335 of the PLT slot. This will be handled in 2336 finish_dynamic_symbol. */ 2337 } 2338 } 2339 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 2340 bfd_link_pic (info), 2341 h) 2342 || (bfd_link_pic (info) 2343 && SYMBOL_REFERENCES_LOCAL (info, h)) 2344 || resolved_to_zero) 2345 { 2346 Elf_Internal_Sym *isym; 2347 asection *sym_sec; 2348 2349 /* This is actually a static link, or it is a 2350 -Bsymbolic link and the symbol is defined 2351 locally, or the symbol was forced to be local 2352 because of a version file. We must initialize 2353 this entry in the global offset table. Since the 2354 offset must always be a multiple of 2, we use the 2355 least significant bit to record whether we have 2356 initialized it already. 2357 2358 When doing a dynamic link, we create a .rel.got 2359 relocation entry to initialize the value. This 2360 is done in the finish_dynamic_symbol routine. */ 2361 if ((off & 1) != 0) 2362 off &= ~1; 2363 else 2364 { 2365 bfd_put_64 (output_bfd, relocation, 2366 htab->elf.sgot->contents + off); 2367 h->got.offset |= 1; 2368 } 2369 2370 /* When turning a GOT slot dereference into a direct 2371 reference using larl we have to make sure that 2372 the symbol is 1. properly aligned and 2. it is no 2373 ABS symbol or will become one. */ 2374 if ((h->def_regular 2375 && bfd_link_pic (info) 2376 && SYMBOL_REFERENCES_LOCAL (info, h)) 2377 /* lgrl rx,sym@GOTENT -> larl rx, sym */ 2378 && ((r_type == R_390_GOTENT 2379 && (bfd_get_16 (input_bfd, 2380 contents + rel->r_offset - 2) 2381 & 0xff0f) == 0xc408) 2382 /* lg rx, sym@GOT(r12) -> larl rx, sym */ 2383 || (r_type == R_390_GOT20 2384 && (bfd_get_32 (input_bfd, 2385 contents + rel->r_offset - 2) 2386 & 0xff00f000) == 0xe300c000 2387 && bfd_get_8 (input_bfd, 2388 contents + rel->r_offset + 3) == 0x04)) 2389 && (isym = bfd_sym_from_r_symndx (&htab->sym_cache, 2390 input_bfd, r_symndx)) 2391 && isym->st_shndx != SHN_ABS 2392 && h != htab->elf.hdynamic 2393 && h != htab->elf.hgot 2394 && h != htab->elf.hplt 2395 && !(isym->st_value & 1) 2396 && (sym_sec = bfd_section_from_elf_index (input_bfd, 2397 isym->st_shndx)) 2398 && sym_sec->alignment_power) 2399 { 2400 unsigned short new_insn = 2401 (0xc000 | (bfd_get_8 (input_bfd, 2402 contents + rel->r_offset - 1) & 0xf0)); 2403 bfd_put_16 (output_bfd, new_insn, 2404 contents + rel->r_offset - 2); 2405 r_type = R_390_PC32DBL; 2406 rel->r_addend = 2; 2407 howto = elf_howto_table + r_type; 2408 relocation = h->root.u.def.value 2409 + h->root.u.def.section->output_section->vma 2410 + h->root.u.def.section->output_offset; 2411 goto do_relocation; 2412 } 2413 } 2414 else 2415 unresolved_reloc = FALSE; 2416 } 2417 else 2418 { 2419 if (local_got_offsets == NULL) 2420 abort (); 2421 2422 off = local_got_offsets[r_symndx]; 2423 2424 /* The offset must always be a multiple of 8. We use 2425 the least significant bit to record whether we have 2426 already generated the necessary reloc. */ 2427 if ((off & 1) != 0) 2428 off &= ~1; 2429 else 2430 { 2431 bfd_put_64 (output_bfd, relocation, 2432 htab->elf.sgot->contents + off); 2433 2434 if (bfd_link_pic (info)) 2435 { 2436 asection *s; 2437 Elf_Internal_Rela outrel; 2438 bfd_byte *loc; 2439 2440 s = htab->elf.srelgot; 2441 if (s == NULL) 2442 abort (); 2443 2444 outrel.r_offset = (htab->elf.sgot->output_section->vma 2445 + htab->elf.sgot->output_offset 2446 + off); 2447 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 2448 outrel.r_addend = relocation; 2449 loc = s->contents; 2450 loc += s->reloc_count++ * sizeof (Elf64_External_Rela); 2451 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2452 } 2453 2454 local_got_offsets[r_symndx] |= 1; 2455 } 2456 } 2457 2458 if (off >= (bfd_vma) -2) 2459 abort (); 2460 2461 relocation = s390_got_offset (info) + off; 2462 2463 /* For @GOTENT the relocation is against the offset between 2464 the instruction and the symbols entry in the GOT and not 2465 between the start of the GOT and the symbols entry. We 2466 add the vma of the GOT to get the correct value. */ 2467 if ( r_type == R_390_GOTENT 2468 || r_type == R_390_GOTPLTENT) 2469 relocation += s390_got_pointer (info); 2470 2471 break; 2472 2473 case R_390_GOTOFF16: 2474 case R_390_GOTOFF32: 2475 case R_390_GOTOFF64: 2476 /* Relocation is relative to the start of the global offset 2477 table. */ 2478 2479 if (h != NULL 2480 && s390_is_ifunc_symbol_p (h) 2481 && h->def_regular 2482 && !bfd_link_executable (info)) 2483 { 2484 relocation = (htab->elf.iplt->output_section->vma 2485 + htab->elf.iplt->output_offset 2486 + h->plt.offset 2487 - s390_got_pointer (info)); 2488 goto do_relocation; 2489 } 2490 2491 relocation -= s390_got_pointer (info); 2492 break; 2493 2494 case R_390_GOTPC: 2495 case R_390_GOTPCDBL: 2496 /* Use global offset table as symbol value. */ 2497 relocation = s390_got_pointer (info); 2498 unresolved_reloc = FALSE; 2499 break; 2500 2501 case R_390_PLT12DBL: 2502 case R_390_PLT16DBL: 2503 case R_390_PLT24DBL: 2504 case R_390_PLT32: 2505 case R_390_PLT32DBL: 2506 case R_390_PLT64: 2507 /* Relocation is to the entry for this symbol in the 2508 procedure linkage table. */ 2509 2510 /* Resolve a PLT32 reloc against a local symbol directly, 2511 without using the procedure linkage table. */ 2512 if (h == NULL) 2513 break; 2514 2515 if (h->plt.offset == (bfd_vma) -1 2516 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) 2517 { 2518 /* We didn't make a PLT entry for this symbol. This 2519 happens when statically linking PIC code, or when 2520 using -Bsymbolic. */ 2521 break; 2522 } 2523 if (s390_is_ifunc_symbol_p (h)) 2524 relocation = (htab->elf.iplt->output_section->vma 2525 + htab->elf.iplt->output_offset 2526 + h->plt.offset); 2527 else 2528 relocation = (htab->elf.splt->output_section->vma 2529 + htab->elf.splt->output_offset 2530 + h->plt.offset); 2531 unresolved_reloc = FALSE; 2532 break; 2533 2534 case R_390_PLTOFF16: 2535 case R_390_PLTOFF32: 2536 case R_390_PLTOFF64: 2537 /* Relocation is to the entry for this symbol in the 2538 procedure linkage table relative to the start of the GOT. */ 2539 2540 /* For local symbols or if we didn't make a PLT entry for 2541 this symbol resolve the symbol directly. */ 2542 if (h == NULL 2543 || h->plt.offset == (bfd_vma) -1 2544 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) 2545 { 2546 relocation -= s390_got_pointer (info); 2547 break; 2548 } 2549 2550 if (s390_is_ifunc_symbol_p (h)) 2551 relocation = (htab->elf.iplt->output_section->vma 2552 + htab->elf.iplt->output_offset 2553 + h->plt.offset 2554 - s390_got_pointer (info)); 2555 else 2556 relocation = (htab->elf.splt->output_section->vma 2557 + htab->elf.splt->output_offset 2558 + h->plt.offset 2559 - s390_got_pointer (info)); 2560 unresolved_reloc = FALSE; 2561 break; 2562 2563 case R_390_PC16: 2564 case R_390_PC12DBL: 2565 case R_390_PC16DBL: 2566 case R_390_PC24DBL: 2567 case R_390_PC32: 2568 case R_390_PC32DBL: 2569 case R_390_PC64: 2570 if (h != NULL 2571 && bfd_link_pie (info) 2572 && !h->def_regular) 2573 { 2574 _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined " 2575 "in shared library and accessed " 2576 "from executable " 2577 "(rebuild file with -fPIC ?)"), 2578 input_bfd, h->root.root.string); 2579 bfd_set_error (bfd_error_bad_value); 2580 return FALSE; 2581 } 2582 /* The target of these relocs are instruction operands 2583 residing in read-only sections. We cannot emit a runtime 2584 reloc for it. */ 2585 if (h != NULL 2586 && s390_is_ifunc_symbol_p (h) 2587 && h->def_regular 2588 && bfd_link_pic (info)) 2589 { 2590 relocation = (htab->elf.iplt->output_section->vma 2591 + htab->elf.iplt->output_offset 2592 + h->plt.offset); 2593 goto do_relocation; 2594 } 2595 /* Fall through. */ 2596 2597 case R_390_8: 2598 case R_390_16: 2599 case R_390_32: 2600 case R_390_64: 2601 2602 if ((input_section->flags & SEC_ALLOC) == 0) 2603 break; 2604 2605 if (h != NULL 2606 && s390_is_ifunc_symbol_p (h) 2607 && h->def_regular) 2608 { 2609 if (!bfd_link_pic (info)) 2610 { 2611 /* For a non-shared object the symbol will not 2612 change. Hence we can write the address of the 2613 target IPLT slot now. */ 2614 relocation = (htab->elf.iplt->output_section->vma 2615 + htab->elf.iplt->output_offset 2616 + h ->plt.offset); 2617 goto do_relocation; 2618 } 2619 else 2620 { 2621 /* For shared objects a runtime relocation is needed. */ 2622 2623 Elf_Internal_Rela outrel; 2624 asection *sreloc; 2625 2626 /* Need a dynamic relocation to get the real function 2627 address. */ 2628 outrel.r_offset = _bfd_elf_section_offset (output_bfd, 2629 info, 2630 input_section, 2631 rel->r_offset); 2632 if (outrel.r_offset == (bfd_vma) -1 2633 || outrel.r_offset == (bfd_vma) -2) 2634 abort (); 2635 2636 outrel.r_offset += (input_section->output_section->vma 2637 + input_section->output_offset); 2638 2639 if (h->dynindx == -1 2640 || h->forced_local 2641 || bfd_link_executable (info)) 2642 { 2643 /* This symbol is resolved locally. */ 2644 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE); 2645 outrel.r_addend = (h->root.u.def.value 2646 + h->root.u.def.section->output_section->vma 2647 + h->root.u.def.section->output_offset); 2648 } 2649 else 2650 { 2651 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); 2652 outrel.r_addend = 0; 2653 } 2654 2655 sreloc = htab->elf.irelifunc; 2656 elf_append_rela (output_bfd, sreloc, &outrel); 2657 2658 /* If this reloc is against an external symbol, we 2659 do not want to fiddle with the addend. Otherwise, 2660 we need to include the symbol value so that it 2661 becomes an addend for the dynamic reloc. For an 2662 internal symbol, we have updated addend. */ 2663 continue; 2664 } 2665 } 2666 2667 if ((bfd_link_pic (info) 2668 && (h == NULL 2669 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 2670 && !resolved_to_zero) 2671 || h->root.type != bfd_link_hash_undefweak) 2672 && ((r_type != R_390_PC16 2673 && r_type != R_390_PC12DBL 2674 && r_type != R_390_PC16DBL 2675 && r_type != R_390_PC24DBL 2676 && r_type != R_390_PC32 2677 && r_type != R_390_PC32DBL 2678 && r_type != R_390_PC64) 2679 || !SYMBOL_CALLS_LOCAL (info, h))) 2680 || (ELIMINATE_COPY_RELOCS 2681 && !bfd_link_pic (info) 2682 && h != NULL 2683 && h->dynindx != -1 2684 && !h->non_got_ref 2685 && ((h->def_dynamic 2686 && !h->def_regular) 2687 || h->root.type == bfd_link_hash_undefweak 2688 || h->root.type == bfd_link_hash_undefined))) 2689 { 2690 Elf_Internal_Rela outrel; 2691 bfd_boolean skip, relocate; 2692 asection *sreloc; 2693 bfd_byte *loc; 2694 2695 /* When generating a shared object, these relocations 2696 are copied into the output file to be resolved at run 2697 time. */ 2698 skip = FALSE; 2699 relocate = FALSE; 2700 2701 outrel.r_offset = 2702 _bfd_elf_section_offset (output_bfd, info, input_section, 2703 rel->r_offset); 2704 if (outrel.r_offset == (bfd_vma) -1) 2705 skip = TRUE; 2706 else if (outrel.r_offset == (bfd_vma) -2) 2707 skip = TRUE, relocate = TRUE; 2708 2709 outrel.r_offset += (input_section->output_section->vma 2710 + input_section->output_offset); 2711 2712 if (skip) 2713 memset (&outrel, 0, sizeof outrel); 2714 else if (h != NULL 2715 && h->dynindx != -1 2716 && (r_type == R_390_PC16 2717 || r_type == R_390_PC12DBL 2718 || r_type == R_390_PC16DBL 2719 || r_type == R_390_PC24DBL 2720 || r_type == R_390_PC32 2721 || r_type == R_390_PC32DBL 2722 || r_type == R_390_PC64 2723 || !bfd_link_pic (info) 2724 || !SYMBOLIC_BIND (info, h) 2725 || !h->def_regular)) 2726 { 2727 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); 2728 outrel.r_addend = rel->r_addend; 2729 } 2730 else 2731 { 2732 /* This symbol is local, or marked to become local. */ 2733 outrel.r_addend = relocation + rel->r_addend; 2734 if (r_type == R_390_64) 2735 { 2736 relocate = TRUE; 2737 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 2738 } 2739 else 2740 { 2741 long sindx; 2742 2743 if (bfd_is_abs_section (sec)) 2744 sindx = 0; 2745 else if (sec == NULL || sec->owner == NULL) 2746 { 2747 bfd_set_error(bfd_error_bad_value); 2748 return FALSE; 2749 } 2750 else 2751 { 2752 asection *osec; 2753 2754 osec = sec->output_section; 2755 sindx = elf_section_data (osec)->dynindx; 2756 2757 if (sindx == 0) 2758 { 2759 osec = htab->elf.text_index_section; 2760 sindx = elf_section_data (osec)->dynindx; 2761 } 2762 BFD_ASSERT (sindx != 0); 2763 2764 /* We are turning this relocation into one 2765 against a section symbol, so subtract out 2766 the output section's address but not the 2767 offset of the input section in the output 2768 section. */ 2769 outrel.r_addend -= osec->vma; 2770 } 2771 outrel.r_info = ELF64_R_INFO (sindx, r_type); 2772 } 2773 } 2774 2775 sreloc = elf_section_data (input_section)->sreloc; 2776 if (sreloc == NULL) 2777 abort (); 2778 2779 loc = sreloc->contents; 2780 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 2781 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2782 2783 /* If this reloc is against an external symbol, we do 2784 not want to fiddle with the addend. Otherwise, we 2785 need to include the symbol value so that it becomes 2786 an addend for the dynamic reloc. */ 2787 if (! relocate) 2788 continue; 2789 } 2790 2791 break; 2792 2793 /* Relocations for tls literal pool entries. */ 2794 case R_390_TLS_IE64: 2795 if (bfd_link_pic (info)) 2796 { 2797 Elf_Internal_Rela outrel; 2798 asection *sreloc; 2799 bfd_byte *loc; 2800 2801 outrel.r_offset = rel->r_offset 2802 + input_section->output_section->vma 2803 + input_section->output_offset; 2804 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 2805 sreloc = elf_section_data (input_section)->sreloc; 2806 if (sreloc == NULL) 2807 abort (); 2808 loc = sreloc->contents; 2809 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 2810 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc); 2811 } 2812 /* Fall through. */ 2813 2814 case R_390_TLS_GD64: 2815 case R_390_TLS_GOTIE64: 2816 r_type = elf_s390_tls_transition (info, r_type, h == NULL); 2817 tls_type = GOT_UNKNOWN; 2818 if (h == NULL && local_got_offsets) 2819 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 2820 else if (h != NULL) 2821 { 2822 tls_type = elf_s390_hash_entry(h)->tls_type; 2823 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE) 2824 r_type = R_390_TLS_LE64; 2825 } 2826 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE) 2827 r_type = R_390_TLS_IE64; 2828 2829 if (r_type == R_390_TLS_LE64) 2830 { 2831 /* This relocation gets optimized away by the local exec 2832 access optimization. */ 2833 BFD_ASSERT (! unresolved_reloc); 2834 bfd_put_64 (output_bfd, -tpoff (info, relocation), 2835 contents + rel->r_offset); 2836 continue; 2837 } 2838 2839 if (htab->elf.sgot == NULL) 2840 abort (); 2841 2842 if (h != NULL) 2843 off = h->got.offset; 2844 else 2845 { 2846 if (local_got_offsets == NULL) 2847 abort (); 2848 2849 off = local_got_offsets[r_symndx]; 2850 } 2851 2852 emit_tls_relocs: 2853 2854 if ((off & 1) != 0) 2855 off &= ~1; 2856 else 2857 { 2858 Elf_Internal_Rela outrel; 2859 bfd_byte *loc; 2860 int dr_type, indx; 2861 2862 if (htab->elf.srelgot == NULL) 2863 abort (); 2864 2865 outrel.r_offset = (htab->elf.sgot->output_section->vma 2866 + htab->elf.sgot->output_offset + off); 2867 2868 indx = h && h->dynindx != -1 ? h->dynindx : 0; 2869 if (r_type == R_390_TLS_GD64) 2870 dr_type = R_390_TLS_DTPMOD; 2871 else 2872 dr_type = R_390_TLS_TPOFF; 2873 if (dr_type == R_390_TLS_TPOFF && indx == 0) 2874 outrel.r_addend = relocation - dtpoff_base (info); 2875 else 2876 outrel.r_addend = 0; 2877 outrel.r_info = ELF64_R_INFO (indx, dr_type); 2878 loc = htab->elf.srelgot->contents; 2879 loc += htab->elf.srelgot->reloc_count++ 2880 * sizeof (Elf64_External_Rela); 2881 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2882 2883 if (r_type == R_390_TLS_GD64) 2884 { 2885 if (indx == 0) 2886 { 2887 BFD_ASSERT (! unresolved_reloc); 2888 bfd_put_64 (output_bfd, 2889 relocation - dtpoff_base (info), 2890 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); 2891 } 2892 else 2893 { 2894 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF); 2895 outrel.r_offset += GOT_ENTRY_SIZE; 2896 outrel.r_addend = 0; 2897 htab->elf.srelgot->reloc_count++; 2898 loc += sizeof (Elf64_External_Rela); 2899 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2900 } 2901 } 2902 2903 if (h != NULL) 2904 h->got.offset |= 1; 2905 else 2906 local_got_offsets[r_symndx] |= 1; 2907 } 2908 2909 if (off >= (bfd_vma) -2) 2910 abort (); 2911 if (r_type == ELF64_R_TYPE (rel->r_info)) 2912 { 2913 relocation = htab->elf.sgot->output_offset + off; 2914 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT) 2915 relocation += htab->elf.sgot->output_section->vma; 2916 unresolved_reloc = FALSE; 2917 } 2918 else 2919 { 2920 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off, 2921 contents + rel->r_offset); 2922 continue; 2923 } 2924 break; 2925 2926 case R_390_TLS_GOTIE12: 2927 case R_390_TLS_GOTIE20: 2928 case R_390_TLS_IEENT: 2929 if (h == NULL) 2930 { 2931 if (local_got_offsets == NULL) 2932 abort(); 2933 off = local_got_offsets[r_symndx]; 2934 if (bfd_link_pic (info)) 2935 goto emit_tls_relocs; 2936 } 2937 else 2938 { 2939 off = h->got.offset; 2940 tls_type = elf_s390_hash_entry(h)->tls_type; 2941 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE) 2942 goto emit_tls_relocs; 2943 } 2944 2945 if (htab->elf.sgot == NULL) 2946 abort (); 2947 2948 BFD_ASSERT (! unresolved_reloc); 2949 bfd_put_64 (output_bfd, -tpoff (info, relocation), 2950 htab->elf.sgot->contents + off); 2951 relocation = htab->elf.sgot->output_offset + off; 2952 if (r_type == R_390_TLS_IEENT) 2953 relocation += htab->elf.sgot->output_section->vma; 2954 unresolved_reloc = FALSE; 2955 break; 2956 2957 case R_390_TLS_LDM64: 2958 if (! bfd_link_pic (info)) 2959 /* The literal pool entry this relocation refers to gets ignored 2960 by the optimized code of the local exec model. Do nothing 2961 and the value will turn out zero. */ 2962 continue; 2963 2964 if (htab->elf.sgot == NULL) 2965 abort (); 2966 2967 off = htab->tls_ldm_got.offset; 2968 if (off & 1) 2969 off &= ~1; 2970 else 2971 { 2972 Elf_Internal_Rela outrel; 2973 bfd_byte *loc; 2974 2975 if (htab->elf.srelgot == NULL) 2976 abort (); 2977 2978 outrel.r_offset = (htab->elf.sgot->output_section->vma 2979 + htab->elf.sgot->output_offset + off); 2980 2981 bfd_put_64 (output_bfd, 0, 2982 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); 2983 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD); 2984 outrel.r_addend = 0; 2985 loc = htab->elf.srelgot->contents; 2986 loc += htab->elf.srelgot->reloc_count++ 2987 * sizeof (Elf64_External_Rela); 2988 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2989 htab->tls_ldm_got.offset |= 1; 2990 } 2991 relocation = htab->elf.sgot->output_offset + off; 2992 unresolved_reloc = FALSE; 2993 break; 2994 2995 case R_390_TLS_LE64: 2996 if (bfd_link_dll (info)) 2997 { 2998 /* Linking a shared library with non-fpic code requires 2999 a R_390_TLS_TPOFF relocation. */ 3000 Elf_Internal_Rela outrel; 3001 asection *sreloc; 3002 bfd_byte *loc; 3003 int indx; 3004 3005 outrel.r_offset = rel->r_offset 3006 + input_section->output_section->vma 3007 + input_section->output_offset; 3008 if (h != NULL && h->dynindx != -1) 3009 indx = h->dynindx; 3010 else 3011 indx = 0; 3012 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF); 3013 if (indx == 0) 3014 outrel.r_addend = relocation - dtpoff_base (info); 3015 else 3016 outrel.r_addend = 0; 3017 sreloc = elf_section_data (input_section)->sreloc; 3018 if (sreloc == NULL) 3019 abort (); 3020 loc = sreloc->contents; 3021 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 3022 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 3023 } 3024 else 3025 { 3026 BFD_ASSERT (! unresolved_reloc); 3027 bfd_put_64 (output_bfd, -tpoff (info, relocation), 3028 contents + rel->r_offset); 3029 } 3030 continue; 3031 3032 case R_390_TLS_LDO64: 3033 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING)) 3034 relocation -= dtpoff_base (info); 3035 else 3036 /* When converting LDO to LE, we must negate. */ 3037 relocation = -tpoff (info, relocation); 3038 break; 3039 3040 /* Relocations for tls instructions. */ 3041 case R_390_TLS_LOAD: 3042 case R_390_TLS_GDCALL: 3043 case R_390_TLS_LDCALL: 3044 tls_type = GOT_UNKNOWN; 3045 if (h == NULL && local_got_offsets) 3046 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 3047 else if (h != NULL) 3048 tls_type = elf_s390_hash_entry(h)->tls_type; 3049 3050 if (tls_type == GOT_TLS_GD) 3051 continue; 3052 3053 if (r_type == R_390_TLS_LOAD) 3054 { 3055 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) 3056 { 3057 /* IE->LE transition. Four valid cases: 3058 lg %rx,(0,%ry) -> sllg %rx,%ry,0 3059 lg %rx,(%ry,0) -> sllg %rx,%ry,0 3060 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0 3061 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */ 3062 unsigned int insn0, insn1, ry; 3063 3064 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); 3065 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); 3066 if (insn1 != 0x0004) 3067 { 3068 invalid_tls_insn (input_bfd, input_section, rel); 3069 return FALSE; 3070 } 3071 if ((insn0 & 0xff00f000) == 0xe3000000) 3072 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */ 3073 ry = (insn0 & 0x000f0000); 3074 else if ((insn0 & 0xff0f0000) == 0xe3000000) 3075 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */ 3076 ry = (insn0 & 0x0000f000) << 4; 3077 else if ((insn0 & 0xff00f000) == 0xe300c000) 3078 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */ 3079 ry = (insn0 & 0x000f0000); 3080 else if ((insn0 & 0xff0f0000) == 0xe30c0000) 3081 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */ 3082 ry = (insn0 & 0x0000f000) << 4; 3083 else 3084 { 3085 invalid_tls_insn (input_bfd, input_section, rel); 3086 return FALSE; 3087 } 3088 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry; 3089 insn1 = 0x000d; 3090 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); 3091 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); 3092 } 3093 } 3094 else if (r_type == R_390_TLS_GDCALL) 3095 { 3096 unsigned int insn0, insn1; 3097 3098 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); 3099 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); 3100 if ((insn0 & 0xffff0000) != 0xc0e50000) 3101 { 3102 invalid_tls_insn (input_bfd, input_section, rel); 3103 return FALSE; 3104 } 3105 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) 3106 { 3107 /* GD->LE transition. 3108 brasl %r14,__tls_get_addr@plt -> brcl 0,. */ 3109 insn0 = 0xc0040000; 3110 insn1 = 0x0000; 3111 } 3112 else 3113 { 3114 /* GD->IE transition. 3115 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */ 3116 insn0 = 0xe322c000; 3117 insn1 = 0x0004; 3118 } 3119 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); 3120 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); 3121 } 3122 else if (r_type == R_390_TLS_LDCALL) 3123 { 3124 if (!bfd_link_pic (info)) 3125 { 3126 unsigned int insn0, insn1; 3127 3128 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); 3129 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); 3130 if ((insn0 & 0xffff0000) != 0xc0e50000) 3131 { 3132 invalid_tls_insn (input_bfd, input_section, rel); 3133 return FALSE; 3134 } 3135 /* LD->LE transition. 3136 brasl %r14,__tls_get_addr@plt -> brcl 0,. */ 3137 insn0 = 0xc0040000; 3138 insn1 = 0x0000; 3139 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); 3140 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); 3141 } 3142 } 3143 continue; 3144 3145 default: 3146 break; 3147 } 3148 3149 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections 3150 because such sections are not SEC_ALLOC and thus ld.so will 3151 not process them. */ 3152 if (unresolved_reloc 3153 && !((input_section->flags & SEC_DEBUGGING) != 0 3154 && h->def_dynamic) 3155 && _bfd_elf_section_offset (output_bfd, info, input_section, 3156 rel->r_offset) != (bfd_vma) -1) 3157 _bfd_error_handler 3158 /* xgettext:c-format */ 3159 (_("%pB(%pA+%#" PRIx64 "): " 3160 "unresolvable %s relocation against symbol `%s'"), 3161 input_bfd, 3162 input_section, 3163 (uint64_t) rel->r_offset, 3164 howto->name, 3165 h->root.root.string); 3166 3167 do_relocation: 3168 3169 /* When applying a 24 bit reloc we need to start one byte 3170 earlier. Otherwise the 32 bit get/put bfd operations might 3171 access a byte after the actual section. */ 3172 if (r_type == R_390_PC24DBL 3173 || r_type == R_390_PLT24DBL) 3174 rel->r_offset--; 3175 3176 if (r_type == R_390_20 3177 || r_type == R_390_GOT20 3178 || r_type == R_390_GOTPLT20 3179 || r_type == R_390_TLS_GOTIE20) 3180 { 3181 relocation += rel->r_addend; 3182 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; 3183 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3184 contents, rel->r_offset, 3185 relocation, 0); 3186 } 3187 else 3188 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3189 contents, rel->r_offset, 3190 relocation, rel->r_addend); 3191 3192 if (r != bfd_reloc_ok) 3193 { 3194 const char *name; 3195 3196 if (h != NULL) 3197 name = h->root.root.string; 3198 else 3199 { 3200 name = bfd_elf_string_from_elf_section (input_bfd, 3201 symtab_hdr->sh_link, 3202 sym->st_name); 3203 if (name == NULL) 3204 return FALSE; 3205 if (*name == '\0') 3206 name = bfd_section_name (sec); 3207 } 3208 3209 if (r == bfd_reloc_overflow) 3210 (*info->callbacks->reloc_overflow) 3211 (info, (h ? &h->root : NULL), name, howto->name, 3212 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 3213 else 3214 { 3215 _bfd_error_handler 3216 /* xgettext:c-format */ 3217 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"), 3218 input_bfd, input_section, 3219 (uint64_t) rel->r_offset, name, (int) r); 3220 return FALSE; 3221 } 3222 } 3223 } 3224 3225 return TRUE; 3226 } 3227 3228 /* Generate the PLT slots together with the dynamic relocations needed 3229 for IFUNC symbols. */ 3230 3231 static void 3232 elf_s390_finish_ifunc_symbol (bfd *output_bfd, 3233 struct bfd_link_info *info, 3234 struct elf_link_hash_entry *h, 3235 struct elf_s390_link_hash_table *htab, 3236 bfd_vma plt_offset, 3237 bfd_vma resolver_address) 3238 { 3239 bfd_vma plt_index; 3240 bfd_vma got_offset; 3241 Elf_Internal_Rela rela; 3242 bfd_byte *loc; 3243 asection *plt, *gotplt, *relplt; 3244 3245 if (htab->elf.iplt == NULL 3246 || htab->elf.igotplt == NULL 3247 || htab->elf.irelplt == NULL) 3248 abort (); 3249 3250 /* Index of the PLT slot within iplt section. */ 3251 plt_index = plt_offset / PLT_ENTRY_SIZE; 3252 plt = htab->elf.iplt; 3253 /* Offset into the igot.plt section. */ 3254 got_offset = plt_index * GOT_ENTRY_SIZE; 3255 gotplt = htab->elf.igotplt; 3256 relplt = htab->elf.irelplt; 3257 3258 /* Fill in the blueprint of a PLT. */ 3259 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry, 3260 PLT_ENTRY_SIZE); 3261 3262 /* Fixup the relative address to the GOT entry */ 3263 bfd_put_32 (output_bfd, 3264 (gotplt->output_section->vma + 3265 gotplt->output_offset + got_offset 3266 - (plt->output_section->vma + 3267 plt->output_offset + 3268 plt_offset))/2, 3269 plt->contents + plt_offset + 2); 3270 /* Fixup the relative branch to PLT 0 */ 3271 bfd_put_32 (output_bfd, - (plt->output_offset + 3272 (PLT_ENTRY_SIZE * plt_index) + 22)/2, 3273 plt->contents + plt_offset + 24); 3274 /* Fixup offset into .rela.plt section. */ 3275 bfd_put_32 (output_bfd, relplt->output_offset + 3276 plt_index * sizeof (Elf64_External_Rela), 3277 plt->contents + plt_offset + 28); 3278 3279 /* Fill in the entry in the global offset table. 3280 Points to instruction after GOT offset. */ 3281 bfd_put_64 (output_bfd, 3282 (plt->output_section->vma 3283 + plt->output_offset 3284 + plt_offset 3285 + 14), 3286 gotplt->contents + got_offset); 3287 3288 /* Fill in the entry in the .rela.plt section. */ 3289 rela.r_offset = (gotplt->output_section->vma 3290 + gotplt->output_offset 3291 + got_offset); 3292 3293 if (!h 3294 || h->dynindx == -1 3295 || ((bfd_link_executable (info) 3296 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 3297 && h->def_regular)) 3298 { 3299 /* The symbol can be locally resolved. */ 3300 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE); 3301 rela.r_addend = resolver_address; 3302 } 3303 else 3304 { 3305 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); 3306 rela.r_addend = 0; 3307 } 3308 3309 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela); 3310 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3311 } 3312 3313 3314 /* Finish up dynamic symbol handling. We set the contents of various 3315 dynamic sections here. */ 3316 3317 static bfd_boolean 3318 elf_s390_finish_dynamic_symbol (bfd *output_bfd, 3319 struct bfd_link_info *info, 3320 struct elf_link_hash_entry *h, 3321 Elf_Internal_Sym *sym) 3322 { 3323 struct elf_s390_link_hash_table *htab; 3324 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h; 3325 3326 htab = elf_s390_hash_table (info); 3327 if (htab == NULL) 3328 return FALSE; 3329 3330 if (h->plt.offset != (bfd_vma) -1) 3331 { 3332 bfd_vma plt_index; 3333 bfd_vma gotplt_offset; 3334 Elf_Internal_Rela rela; 3335 bfd_byte *loc; 3336 3337 /* This symbol has an entry in the procedure linkage table. Set 3338 it up. */ 3339 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 3340 { 3341 elf_s390_finish_ifunc_symbol (output_bfd, info, h, 3342 htab, h->plt.offset, 3343 eh->ifunc_resolver_address + 3344 eh->ifunc_resolver_section->output_offset + 3345 eh->ifunc_resolver_section->output_section->vma); 3346 3347 /* Do not return yet. Handling of explicit GOT slots of 3348 IFUNC symbols is below. */ 3349 } 3350 else 3351 { 3352 if (h->dynindx == -1 3353 || htab->elf.splt == NULL 3354 || htab->elf.sgotplt == NULL 3355 || htab->elf.srelplt == NULL) 3356 abort (); 3357 3358 /* Calc. index no. 3359 Current offset - size first entry / entry size. */ 3360 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; 3361 3362 /* The slots in the .got.plt correspond to the PLT slots in 3363 the same order. */ 3364 gotplt_offset = plt_index * GOT_ENTRY_SIZE; 3365 3366 /* If .got.plt comes first it needs to contain the 3 header 3367 entries. */ 3368 if (!s390_gotplt_after_got_p (info)) 3369 gotplt_offset += 3 * GOT_ENTRY_SIZE; 3370 3371 /* Fill in the blueprint of a PLT. */ 3372 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry, 3373 PLT_ENTRY_SIZE); 3374 3375 /* The first instruction in the PLT entry is a LARL loading 3376 the address of the GOT slot. We write the 4 byte 3377 immediate operand of the LARL instruction here. */ 3378 bfd_put_32 (output_bfd, 3379 (htab->elf.sgotplt->output_section->vma + 3380 htab->elf.sgotplt->output_offset + gotplt_offset 3381 - (htab->elf.splt->output_section->vma + 3382 htab->elf.splt->output_offset + 3383 h->plt.offset))/2, 3384 htab->elf.splt->contents + h->plt.offset + 2); 3385 /* Fixup the relative branch to PLT 0 */ 3386 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE + 3387 (PLT_ENTRY_SIZE * plt_index) + 22)/2, 3388 htab->elf.splt->contents + h->plt.offset + 24); 3389 /* Fixup offset into .rela.plt section. */ 3390 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela), 3391 htab->elf.splt->contents + h->plt.offset + 28); 3392 3393 /* Fill in the entry in the global offset table. 3394 Points to instruction after GOT offset. */ 3395 bfd_put_64 (output_bfd, 3396 (htab->elf.splt->output_section->vma 3397 + htab->elf.splt->output_offset 3398 + h->plt.offset 3399 + 14), 3400 htab->elf.sgotplt->contents + gotplt_offset); 3401 3402 /* Fill in the entry in the .rela.plt section. */ 3403 rela.r_offset = (htab->elf.sgotplt->output_section->vma 3404 + htab->elf.sgotplt->output_offset 3405 + gotplt_offset); 3406 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); 3407 rela.r_addend = 0; 3408 loc = htab->elf.srelplt->contents + plt_index * 3409 sizeof (Elf64_External_Rela); 3410 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3411 3412 if (!h->def_regular) 3413 { 3414 /* Mark the symbol as undefined, rather than as defined in 3415 the .plt section. Leave the value alone. This is a clue 3416 for the dynamic linker, to make function pointer 3417 comparisons work between an application and shared 3418 library. */ 3419 sym->st_shndx = SHN_UNDEF; 3420 } 3421 } 3422 } 3423 3424 if (h->got.offset != (bfd_vma) -1 3425 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD 3426 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE 3427 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) 3428 { 3429 Elf_Internal_Rela rela; 3430 bfd_byte *loc; 3431 3432 /* This symbol has an entry in the global offset table. Set it 3433 up. */ 3434 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) 3435 abort (); 3436 3437 rela.r_offset = (htab->elf.sgot->output_section->vma 3438 + htab->elf.sgot->output_offset 3439 + (h->got.offset &~ (bfd_vma) 1)); 3440 3441 if (h->def_regular && s390_is_ifunc_symbol_p (h)) 3442 { 3443 if (bfd_link_pic (info)) 3444 { 3445 /* An explicit GOT slot usage needs GLOB_DAT. If the 3446 symbol references local the implicit got.iplt slot 3447 will be used and the IRELATIVE reloc has been created 3448 above. */ 3449 goto do_glob_dat; 3450 } 3451 else 3452 { 3453 /* For non-shared objects explicit GOT slots must be 3454 filled with the PLT slot address for pointer 3455 equality reasons. */ 3456 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma 3457 + htab->elf.iplt->output_offset 3458 + h->plt.offset), 3459 htab->elf.sgot->contents + h->got.offset); 3460 return TRUE; 3461 } 3462 } 3463 else if (bfd_link_pic (info) 3464 && SYMBOL_REFERENCES_LOCAL (info, h)) 3465 { 3466 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) 3467 return TRUE; 3468 3469 /* If this is a static link, or it is a -Bsymbolic link and 3470 the symbol is defined locally or was forced to be local 3471 because of a version file, we just want to emit a 3472 RELATIVE reloc. The entry in the global offset table 3473 will already have been initialized in the 3474 relocate_section function. */ 3475 if (!(h->def_regular || ELF_COMMON_DEF_P (h))) 3476 return FALSE; 3477 BFD_ASSERT((h->got.offset & 1) != 0); 3478 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 3479 rela.r_addend = (h->root.u.def.value 3480 + h->root.u.def.section->output_section->vma 3481 + h->root.u.def.section->output_offset); 3482 } 3483 else 3484 { 3485 BFD_ASSERT((h->got.offset & 1) == 0); 3486 do_glob_dat: 3487 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset); 3488 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT); 3489 rela.r_addend = 0; 3490 } 3491 3492 loc = htab->elf.srelgot->contents; 3493 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela); 3494 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3495 } 3496 3497 if (h->needs_copy) 3498 { 3499 Elf_Internal_Rela rela; 3500 asection *s; 3501 bfd_byte *loc; 3502 3503 /* This symbols needs a copy reloc. Set it up. */ 3504 3505 if (h->dynindx == -1 3506 || (h->root.type != bfd_link_hash_defined 3507 && h->root.type != bfd_link_hash_defweak) 3508 || htab->elf.srelbss == NULL) 3509 abort (); 3510 3511 rela.r_offset = (h->root.u.def.value 3512 + h->root.u.def.section->output_section->vma 3513 + h->root.u.def.section->output_offset); 3514 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY); 3515 rela.r_addend = 0; 3516 if (h->root.u.def.section == htab->elf.sdynrelro) 3517 s = htab->elf.sreldynrelro; 3518 else 3519 s = htab->elf.srelbss; 3520 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela); 3521 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3522 } 3523 3524 /* Mark some specially defined symbols as absolute. */ 3525 if (h == htab->elf.hdynamic 3526 || h == htab->elf.hgot 3527 || h == htab->elf.hplt) 3528 sym->st_shndx = SHN_ABS; 3529 3530 return TRUE; 3531 } 3532 3533 /* Used to decide how to sort relocs in an optimal manner for the 3534 dynamic linker, before writing them out. */ 3535 3536 static enum elf_reloc_type_class 3537 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 3538 const asection *rel_sec ATTRIBUTE_UNUSED, 3539 const Elf_Internal_Rela *rela) 3540 { 3541 bfd *abfd = info->output_bfd; 3542 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 3543 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info); 3544 unsigned long r_symndx = ELF64_R_SYM (rela->r_info); 3545 Elf_Internal_Sym sym; 3546 3547 if (htab->elf.dynsym == NULL 3548 || !bed->s->swap_symbol_in (abfd, 3549 (htab->elf.dynsym->contents 3550 + r_symndx * bed->s->sizeof_sym), 3551 0, &sym)) 3552 abort (); 3553 3554 /* Check relocation against STT_GNU_IFUNC symbol. */ 3555 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) 3556 return reloc_class_ifunc; 3557 3558 switch ((int) ELF64_R_TYPE (rela->r_info)) 3559 { 3560 case R_390_RELATIVE: 3561 return reloc_class_relative; 3562 case R_390_JMP_SLOT: 3563 return reloc_class_plt; 3564 case R_390_COPY: 3565 return reloc_class_copy; 3566 default: 3567 return reloc_class_normal; 3568 } 3569 } 3570 3571 /* Finish up the dynamic sections. */ 3572 3573 static bfd_boolean 3574 elf_s390_finish_dynamic_sections (bfd *output_bfd, 3575 struct bfd_link_info *info) 3576 { 3577 struct elf_s390_link_hash_table *htab; 3578 bfd *dynobj; 3579 asection *sdyn; 3580 bfd *ibfd; 3581 unsigned int i; 3582 3583 htab = elf_s390_hash_table (info); 3584 if (htab == NULL) 3585 return FALSE; 3586 3587 dynobj = htab->elf.dynobj; 3588 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 3589 3590 if (htab->elf.dynamic_sections_created) 3591 { 3592 Elf64_External_Dyn *dyncon, *dynconend; 3593 3594 if (sdyn == NULL || htab->elf.sgot == NULL) 3595 abort (); 3596 3597 dyncon = (Elf64_External_Dyn *) sdyn->contents; 3598 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); 3599 for (; dyncon < dynconend; dyncon++) 3600 { 3601 Elf_Internal_Dyn dyn; 3602 asection *s; 3603 3604 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); 3605 3606 switch (dyn.d_tag) 3607 { 3608 default: 3609 continue; 3610 3611 case DT_PLTGOT: 3612 /* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */ 3613 dyn.d_un.d_ptr = s390_got_pointer (info); 3614 break; 3615 3616 case DT_JMPREL: 3617 s = htab->elf.srelplt; 3618 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 3619 break; 3620 3621 case DT_PLTRELSZ: 3622 dyn.d_un.d_val = htab->elf.srelplt->size; 3623 if (htab->elf.irelplt) 3624 dyn.d_un.d_val += htab->elf.irelplt->size; 3625 break; 3626 3627 case DT_RELASZ: 3628 /* The procedure linkage table relocs (DT_JMPREL) should 3629 not be included in the overall relocs (DT_RELA). 3630 Therefore, we override the DT_RELASZ entry here to 3631 make it not include the JMPREL relocs. Since the 3632 linker script arranges for .rela.plt to follow all 3633 other relocation sections, we don't have to worry 3634 about changing the DT_RELA entry. */ 3635 dyn.d_un.d_val -= htab->elf.srelplt->size; 3636 if (htab->elf.irelplt) 3637 dyn.d_un.d_val -= htab->elf.irelplt->size; 3638 break; 3639 } 3640 3641 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); 3642 } 3643 3644 /* Fill in the special first entry in the procedure linkage table. */ 3645 if (htab->elf.splt && htab->elf.splt->size > 0) 3646 { 3647 /* fill in blueprint for plt 0 entry */ 3648 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry, 3649 PLT_FIRST_ENTRY_SIZE); 3650 /* The second instruction in the first PLT entry is a LARL 3651 loading the GOT pointer. Fill in the LARL immediate 3652 address. */ 3653 bfd_put_32 (output_bfd, 3654 (s390_got_pointer (info) 3655 - htab->elf.splt->output_section->vma 3656 - htab->elf.splt->output_offset - 6)/2, 3657 htab->elf.splt->contents + 8); 3658 } 3659 if (elf_section_data (htab->elf.splt->output_section) != NULL) 3660 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize 3661 = PLT_ENTRY_SIZE; 3662 } 3663 3664 if (htab->elf.hgot && htab->elf.hgot->root.u.def.section) 3665 { 3666 /* Fill in the first three entries in the global offset table. */ 3667 if (htab->elf.hgot->root.u.def.section->size > 0) 3668 { 3669 bfd_put_64 (output_bfd, 3670 (sdyn == NULL ? (bfd_vma) 0 3671 : sdyn->output_section->vma + sdyn->output_offset), 3672 htab->elf.hgot->root.u.def.section->contents); 3673 /* One entry for shared object struct ptr. */ 3674 bfd_put_64 (output_bfd, (bfd_vma) 0, 3675 htab->elf.hgot->root.u.def.section->contents + 8); 3676 /* One entry for _dl_runtime_resolve. */ 3677 bfd_put_64 (output_bfd, (bfd_vma) 0, 3678 htab->elf.hgot->root.u.def.section->contents + 16); 3679 } 3680 elf_section_data (htab->elf.sgot->output_section) 3681 ->this_hdr.sh_entsize = 8; 3682 } 3683 3684 /* Finish dynamic symbol for local IFUNC symbols. */ 3685 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 3686 { 3687 struct plt_entry *local_plt; 3688 Elf_Internal_Sym *isym; 3689 Elf_Internal_Shdr *symtab_hdr; 3690 3691 symtab_hdr = &elf_symtab_hdr (ibfd); 3692 3693 if (!is_s390_elf (ibfd)) 3694 continue; 3695 3696 local_plt = elf_s390_local_plt (ibfd); 3697 if (local_plt != NULL) 3698 for (i = 0; i < symtab_hdr->sh_info; i++) 3699 { 3700 if (local_plt[i].plt.offset != (bfd_vma) -1) 3701 { 3702 asection *sec = local_plt[i].sec; 3703 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i); 3704 if (isym == NULL) 3705 return FALSE; 3706 3707 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 3708 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab, 3709 local_plt[i].plt.offset, 3710 isym->st_value 3711 + sec->output_section->vma 3712 + sec->output_offset); 3713 3714 } 3715 } 3716 } 3717 3718 return TRUE; 3719 } 3720 3721 /* Support for core dump NOTE sections. */ 3722 3723 static bfd_boolean 3724 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 3725 { 3726 int offset; 3727 size_t size; 3728 3729 switch (note->descsz) 3730 { 3731 default: 3732 return FALSE; 3733 3734 case 336: /* sizeof(struct elf_prstatus) on s390x */ 3735 /* pr_cursig */ 3736 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 3737 3738 /* pr_pid */ 3739 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32); 3740 3741 /* pr_reg */ 3742 offset = 112; 3743 size = 216; 3744 break; 3745 } 3746 3747 /* Make a ".reg/999" section. */ 3748 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 3749 size, note->descpos + offset); 3750 } 3751 3752 static bfd_boolean 3753 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 3754 { 3755 switch (note->descsz) 3756 { 3757 default: 3758 return FALSE; 3759 3760 case 136: /* sizeof(struct elf_prpsinfo) on s390x */ 3761 elf_tdata (abfd)->core->pid 3762 = bfd_get_32 (abfd, note->descdata + 24); 3763 elf_tdata (abfd)->core->program 3764 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); 3765 elf_tdata (abfd)->core->command 3766 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); 3767 } 3768 3769 /* Note that for some reason, a spurious space is tacked 3770 onto the end of the args in some (at least one anyway) 3771 implementations, so strip it off if it exists. */ 3772 3773 { 3774 char *command = elf_tdata (abfd)->core->command; 3775 int n = strlen (command); 3776 3777 if (0 < n && command[n - 1] == ' ') 3778 command[n - 1] = '\0'; 3779 } 3780 3781 return TRUE; 3782 } 3783 3784 static char * 3785 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz, 3786 int note_type, ...) 3787 { 3788 va_list ap; 3789 3790 switch (note_type) 3791 { 3792 default: 3793 return NULL; 3794 3795 case NT_PRPSINFO: 3796 { 3797 char data[136] ATTRIBUTE_NONSTRING = { 0 }; 3798 const char *fname, *psargs; 3799 3800 va_start (ap, note_type); 3801 fname = va_arg (ap, const char *); 3802 psargs = va_arg (ap, const char *); 3803 va_end (ap); 3804 3805 strncpy (data + 40, fname, 16); 3806 #if GCC_VERSION == 8000 || GCC_VERSION == 8001 3807 DIAGNOSTIC_PUSH; 3808 /* GCC 8.0 and 8.1 warn about 80 equals destination size with 3809 -Wstringop-truncation: 3810 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643 3811 */ 3812 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION; 3813 #endif 3814 strncpy (data + 56, psargs, 80); 3815 #if GCC_VERSION == 8000 || GCC_VERSION == 8001 3816 DIAGNOSTIC_POP; 3817 #endif 3818 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, 3819 &data, sizeof (data)); 3820 } 3821 3822 case NT_PRSTATUS: 3823 { 3824 char data[336] = { 0 }; 3825 long pid; 3826 int cursig; 3827 const void *gregs; 3828 3829 va_start (ap, note_type); 3830 pid = va_arg (ap, long); 3831 cursig = va_arg (ap, int); 3832 gregs = va_arg (ap, const void *); 3833 va_end (ap); 3834 3835 bfd_put_16 (abfd, cursig, data + 12); 3836 bfd_put_32 (abfd, pid, data + 32); 3837 memcpy (data + 112, gregs, 216); 3838 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, 3839 &data, sizeof (data)); 3840 } 3841 } 3842 /* NOTREACHED */ 3843 } 3844 3845 /* Return address for Ith PLT stub in section PLT, for relocation REL 3846 or (bfd_vma) -1 if it should not be included. */ 3847 3848 static bfd_vma 3849 elf_s390_plt_sym_val (bfd_vma i, const asection *plt, 3850 const arelent *rel ATTRIBUTE_UNUSED) 3851 { 3852 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; 3853 } 3854 3855 /* Merge backend specific data from an object file to the output 3856 object file when linking. */ 3857 3858 static bfd_boolean 3859 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 3860 { 3861 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd)) 3862 return TRUE; 3863 3864 return elf_s390_merge_obj_attributes (ibfd, info); 3865 } 3866 3867 /* We may add a PT_S390_PGSTE program header. */ 3868 3869 static int 3870 elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED, 3871 struct bfd_link_info *info) 3872 { 3873 struct elf_s390_link_hash_table *htab; 3874 3875 if (info) 3876 { 3877 htab = elf_s390_hash_table (info); 3878 if (htab) 3879 return htab->params->pgste; 3880 } 3881 return 0; 3882 } 3883 3884 3885 /* Add the PT_S390_PGSTE program header. */ 3886 3887 static bfd_boolean 3888 elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info) 3889 { 3890 struct elf_s390_link_hash_table *htab; 3891 struct elf_segment_map *m, *pm = NULL; 3892 3893 if (!abfd || !info) 3894 return TRUE; 3895 3896 htab = elf_s390_hash_table (info); 3897 if (!htab || !htab->params->pgste) 3898 return TRUE; 3899 3900 /* If there is already a PT_S390_PGSTE header, avoid adding 3901 another. */ 3902 m = elf_seg_map (abfd); 3903 while (m && m->p_type != PT_S390_PGSTE) 3904 { 3905 pm = m; 3906 m = m->next; 3907 } 3908 3909 if (m) 3910 return TRUE; 3911 3912 m = (struct elf_segment_map *) 3913 bfd_zalloc (abfd, sizeof (struct elf_segment_map)); 3914 if (m == NULL) 3915 return FALSE; 3916 m->p_type = PT_S390_PGSTE; 3917 m->count = 0; 3918 m->next = NULL; 3919 if (pm) 3920 pm->next = m; 3921 3922 return TRUE; 3923 } 3924 3925 bfd_boolean 3926 bfd_elf_s390_set_options (struct bfd_link_info *info, 3927 struct s390_elf_params *params) 3928 { 3929 struct elf_s390_link_hash_table *htab; 3930 3931 if (info) 3932 { 3933 htab = elf_s390_hash_table (info); 3934 if (htab) 3935 htab->params = params; 3936 } 3937 3938 return TRUE; 3939 } 3940 3941 3942 /* Why was the hash table entry size definition changed from 3943 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and 3944 this is the only reason for the s390_elf64_size_info structure. */ 3945 3946 const struct elf_size_info s390_elf64_size_info = 3947 { 3948 sizeof (Elf64_External_Ehdr), 3949 sizeof (Elf64_External_Phdr), 3950 sizeof (Elf64_External_Shdr), 3951 sizeof (Elf64_External_Rel), 3952 sizeof (Elf64_External_Rela), 3953 sizeof (Elf64_External_Sym), 3954 sizeof (Elf64_External_Dyn), 3955 sizeof (Elf_External_Note), 3956 8, /* hash-table entry size. */ 3957 1, /* internal relocations per external relocations. */ 3958 64, /* arch_size. */ 3959 3, /* log_file_align. */ 3960 ELFCLASS64, EV_CURRENT, 3961 bfd_elf64_write_out_phdrs, 3962 bfd_elf64_write_shdrs_and_ehdr, 3963 bfd_elf64_checksum_contents, 3964 bfd_elf64_write_relocs, 3965 bfd_elf64_swap_symbol_in, 3966 bfd_elf64_swap_symbol_out, 3967 bfd_elf64_slurp_reloc_table, 3968 bfd_elf64_slurp_symbol_table, 3969 bfd_elf64_swap_dyn_in, 3970 bfd_elf64_swap_dyn_out, 3971 bfd_elf64_swap_reloc_in, 3972 bfd_elf64_swap_reloc_out, 3973 bfd_elf64_swap_reloca_in, 3974 bfd_elf64_swap_reloca_out 3975 }; 3976 3977 #define TARGET_BIG_SYM s390_elf64_vec 3978 #define TARGET_BIG_NAME "elf64-s390" 3979 #define ELF_ARCH bfd_arch_s390 3980 #define ELF_TARGET_ID S390_ELF_DATA 3981 #define ELF_MACHINE_CODE EM_S390 3982 #define ELF_MACHINE_ALT1 EM_S390_OLD 3983 #define ELF_MAXPAGESIZE 0x1000 3984 3985 #define elf_backend_size_info s390_elf64_size_info 3986 3987 #define elf_backend_can_gc_sections 1 3988 #define elf_backend_can_refcount 1 3989 #define elf_backend_want_got_plt 1 3990 #define elf_backend_plt_readonly 1 3991 #define elf_backend_want_plt_sym 0 3992 #define elf_backend_got_header_size 24 3993 #define elf_backend_want_dynrelro 1 3994 #define elf_backend_rela_normal 1 3995 3996 #define elf_info_to_howto elf_s390_info_to_howto 3997 3998 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name 3999 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create 4000 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup 4001 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup 4002 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data 4003 4004 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol 4005 #define elf_backend_check_relocs elf_s390_check_relocs 4006 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol 4007 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections 4008 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections 4009 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol 4010 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook 4011 #define elf_backend_reloc_type_class elf_s390_reloc_type_class 4012 #define elf_backend_relocate_section elf_s390_relocate_section 4013 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections 4014 #define elf_backend_init_index_section _bfd_elf_init_1_index_section 4015 #define elf_backend_grok_prstatus elf_s390_grok_prstatus 4016 #define elf_backend_grok_psinfo elf_s390_grok_psinfo 4017 #define elf_backend_write_core_note elf_s390_write_core_note 4018 #define elf_backend_plt_sym_val elf_s390_plt_sym_val 4019 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p 4020 #define elf_backend_additional_program_headers elf_s390_additional_program_headers 4021 #define elf_backend_modify_segment_map elf_s390_modify_segment_map 4022 4023 #define bfd_elf64_mkobject elf_s390_mkobject 4024 #define elf_backend_object_p elf_s390_object_p 4025 4026 #include "elf64-target.h" 4027