1 /* IBM S/390-specific support for 64-bit ELF 2 Copyright (C) 2000-2018 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 procedure linkage 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 offset in symbl table in r1 515 BRCL 15,-x # 6 bytes Jump to start of PLT 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 BFD_ASSERT (h != NULL); 1305 if (h != NULL 1306 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1307 return FALSE; 1308 break; 1309 1310 default: 1311 break; 1312 } 1313 } 1314 1315 return TRUE; 1316 } 1317 1318 /* Return the section that should be marked against GC for a given 1319 relocation. */ 1320 1321 static asection * 1322 elf_s390_gc_mark_hook (asection *sec, 1323 struct bfd_link_info *info, 1324 Elf_Internal_Rela *rel, 1325 struct elf_link_hash_entry *h, 1326 Elf_Internal_Sym *sym) 1327 { 1328 if (h != NULL) 1329 switch (ELF64_R_TYPE (rel->r_info)) 1330 { 1331 case R_390_GNU_VTINHERIT: 1332 case R_390_GNU_VTENTRY: 1333 return NULL; 1334 } 1335 1336 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1337 } 1338 1339 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT 1340 entry but we found we will not create any. Called when we find we will 1341 not have any PLT for this symbol, by for example 1342 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, 1343 or elf_s390_size_dynamic_sections if no dynamic sections will be 1344 created (we're only linking static objects). */ 1345 1346 static void 1347 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h) 1348 { 1349 if (h->elf.root.type == bfd_link_hash_warning) 1350 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; 1351 1352 if (h->gotplt_refcount <= 0) 1353 return; 1354 1355 /* We simply add the number of gotplt references to the number 1356 * of got references for this symbol. */ 1357 h->elf.got.refcount += h->gotplt_refcount; 1358 h->gotplt_refcount = -1; 1359 } 1360 1361 /* Find dynamic relocs for H that apply to read-only sections. */ 1362 1363 static asection * 1364 readonly_dynrelocs (struct elf_link_hash_entry *h) 1365 { 1366 struct elf_dyn_relocs *p; 1367 1368 for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) 1369 { 1370 asection *s = p->sec->output_section; 1371 1372 if (s != NULL && (s->flags & SEC_READONLY) != 0) 1373 return p->sec; 1374 } 1375 return NULL; 1376 } 1377 1378 /* Adjust a symbol defined by a dynamic object and referenced by a 1379 regular object. The current definition is in some section of the 1380 dynamic object, but we're not including those sections. We have to 1381 change the definition to something the rest of the link can 1382 understand. */ 1383 1384 static bfd_boolean 1385 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info, 1386 struct elf_link_hash_entry *h) 1387 { 1388 struct elf_s390_link_hash_table *htab; 1389 asection *s, *srel; 1390 1391 /* STT_GNU_IFUNC symbol must go through PLT. */ 1392 if (s390_is_ifunc_symbol_p (h)) 1393 { 1394 /* All local STT_GNU_IFUNC references must be treated as local 1395 calls via local PLT. */ 1396 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h)) 1397 { 1398 bfd_size_type pc_count = 0, count = 0; 1399 struct elf_dyn_relocs **pp; 1400 struct elf_s390_link_hash_entry *eh; 1401 struct elf_dyn_relocs *p; 1402 1403 eh = (struct elf_s390_link_hash_entry *) h; 1404 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 1405 { 1406 pc_count += p->pc_count; 1407 p->count -= p->pc_count; 1408 p->pc_count = 0; 1409 count += p->count; 1410 if (p->count == 0) 1411 *pp = p->next; 1412 else 1413 pp = &p->next; 1414 } 1415 1416 if (pc_count || count) 1417 { 1418 h->needs_plt = 1; 1419 h->non_got_ref = 1; 1420 if (h->plt.refcount <= 0) 1421 h->plt.refcount = 1; 1422 else 1423 h->plt.refcount += 1; 1424 } 1425 } 1426 1427 if (h->plt.refcount <= 0) 1428 { 1429 h->plt.offset = (bfd_vma) -1; 1430 h->needs_plt = 0; 1431 } 1432 return TRUE; 1433 } 1434 1435 /* If this is a function, put it in the procedure linkage table. We 1436 will fill in the contents of the procedure linkage table later 1437 (although we could actually do it here). */ 1438 if (h->type == STT_FUNC 1439 || h->needs_plt) 1440 { 1441 if (h->plt.refcount <= 0 1442 || SYMBOL_CALLS_LOCAL (info, h) 1443 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) 1444 { 1445 /* This case can occur if we saw a PLT32 reloc in an input 1446 file, but the symbol was never referred to by a dynamic 1447 object, or if all references were garbage collected. In 1448 such a case, we don't actually need to build a procedure 1449 linkage table, and we can just do a PC32 reloc instead. */ 1450 h->plt.offset = (bfd_vma) -1; 1451 h->needs_plt = 0; 1452 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1453 } 1454 1455 return TRUE; 1456 } 1457 else 1458 /* It's possible that we incorrectly decided a .plt reloc was 1459 needed for an R_390_PC32 reloc to a non-function sym in 1460 check_relocs. We can't decide accurately between function and 1461 non-function syms in check-relocs; Objects loaded later in 1462 the link may change h->type. So fix it now. */ 1463 h->plt.offset = (bfd_vma) -1; 1464 1465 /* If this is a weak symbol, and there is a real definition, the 1466 processor independent code will have arranged for us to see the 1467 real definition first, and we can just use the same value. */ 1468 if (h->is_weakalias) 1469 { 1470 struct elf_link_hash_entry *def = weakdef (h); 1471 BFD_ASSERT (def->root.type == bfd_link_hash_defined); 1472 h->root.u.def.section = def->root.u.def.section; 1473 h->root.u.def.value = def->root.u.def.value; 1474 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) 1475 h->non_got_ref = def->non_got_ref; 1476 return TRUE; 1477 } 1478 1479 /* This is a reference to a symbol defined by a dynamic object which 1480 is not a function. */ 1481 1482 /* If we are creating a shared library, we must presume that the 1483 only references to the symbol are via the global offset table. 1484 For such cases we need not do anything here; the relocations will 1485 be handled correctly by relocate_section. */ 1486 if (bfd_link_pic (info)) 1487 return TRUE; 1488 1489 /* If there are no references to this symbol that do not use the 1490 GOT, we don't need to generate a copy reloc. */ 1491 if (!h->non_got_ref) 1492 return TRUE; 1493 1494 /* If -z nocopyreloc was given, we won't generate them either. */ 1495 if (info->nocopyreloc) 1496 { 1497 h->non_got_ref = 0; 1498 return TRUE; 1499 } 1500 1501 /* If we don't find any dynamic relocs in read-only sections, then 1502 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 1503 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h)) 1504 { 1505 h->non_got_ref = 0; 1506 return TRUE; 1507 } 1508 1509 /* We must allocate the symbol in our .dynbss section, which will 1510 become part of the .bss section of the executable. There will be 1511 an entry for this symbol in the .dynsym section. The dynamic 1512 object will contain position independent code, so all references 1513 from the dynamic object to this symbol will go through the global 1514 offset table. The dynamic linker will use the .dynsym entry to 1515 determine the address it must put in the global offset table, so 1516 both the dynamic object and the regular object will refer to the 1517 same memory location for the variable. */ 1518 1519 htab = elf_s390_hash_table (info); 1520 if (htab == NULL) 1521 return FALSE; 1522 1523 /* We must generate a R_390_COPY reloc to tell the dynamic linker to 1524 copy the initial value out of the dynamic object and into the 1525 runtime process image. */ 1526 if ((h->root.u.def.section->flags & SEC_READONLY) != 0) 1527 { 1528 s = htab->elf.sdynrelro; 1529 srel = htab->elf.sreldynrelro; 1530 } 1531 else 1532 { 1533 s = htab->elf.sdynbss; 1534 srel = htab->elf.srelbss; 1535 } 1536 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 1537 { 1538 srel->size += sizeof (Elf64_External_Rela); 1539 h->needs_copy = 1; 1540 } 1541 1542 return _bfd_elf_adjust_dynamic_copy (info, h, s); 1543 } 1544 1545 /* Allocate space in .plt, .got and associated reloc sections for 1546 dynamic relocs. */ 1547 1548 static bfd_boolean 1549 allocate_dynrelocs (struct elf_link_hash_entry *h, 1550 void * inf) 1551 { 1552 struct bfd_link_info *info; 1553 struct elf_s390_link_hash_table *htab; 1554 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h; 1555 struct elf_dyn_relocs *p; 1556 1557 if (h->root.type == bfd_link_hash_indirect) 1558 return TRUE; 1559 1560 info = (struct bfd_link_info *) inf; 1561 htab = elf_s390_hash_table (info); 1562 if (htab == NULL) 1563 return FALSE; 1564 1565 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it 1566 here if it is defined and referenced in a non-shared object. */ 1567 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 1568 return s390_elf_allocate_ifunc_dyn_relocs (info, h); 1569 else if (htab->elf.dynamic_sections_created 1570 && h->plt.refcount > 0) 1571 { 1572 /* Make sure this symbol is output as a dynamic symbol. 1573 Undefined weak syms won't yet be marked as dynamic. */ 1574 if (h->dynindx == -1 1575 && !h->forced_local) 1576 { 1577 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1578 return FALSE; 1579 } 1580 1581 if (bfd_link_pic (info) 1582 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) 1583 { 1584 asection *s = htab->elf.splt; 1585 1586 /* If this is the first .plt entry, make room for the special 1587 first entry. */ 1588 if (s->size == 0) 1589 s->size += PLT_FIRST_ENTRY_SIZE; 1590 1591 h->plt.offset = s->size; 1592 1593 /* If this symbol is not defined in a regular file, and we are 1594 not generating a shared library, then set the symbol to this 1595 location in the .plt. This is required to make function 1596 pointers compare as equal between the normal executable and 1597 the shared library. */ 1598 if (! bfd_link_pic (info) 1599 && !h->def_regular) 1600 { 1601 h->root.u.def.section = s; 1602 h->root.u.def.value = h->plt.offset; 1603 } 1604 1605 /* Make room for this entry. */ 1606 s->size += PLT_ENTRY_SIZE; 1607 1608 /* We also need to make an entry in the .got.plt section, which 1609 will be placed in the .got section by the linker script. */ 1610 htab->elf.sgotplt->size += GOT_ENTRY_SIZE; 1611 1612 /* We also need to make an entry in the .rela.plt section. */ 1613 htab->elf.srelplt->size += sizeof (Elf64_External_Rela); 1614 } 1615 else 1616 { 1617 h->plt.offset = (bfd_vma) -1; 1618 h->needs_plt = 0; 1619 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1620 } 1621 } 1622 else 1623 { 1624 h->plt.offset = (bfd_vma) -1; 1625 h->needs_plt = 0; 1626 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1627 } 1628 1629 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to 1630 the binary, we can optimize a bit. IE64 and GOTIE64 get converted 1631 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT 1632 we can save the dynamic TLS relocation. */ 1633 if (h->got.refcount > 0 1634 && !bfd_link_pic (info) 1635 && h->dynindx == -1 1636 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) 1637 { 1638 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) 1639 /* For the GOTIE access without a literal pool entry the offset has 1640 to be stored somewhere. The immediate value in the instruction 1641 is not bit enough so the value is stored in the got. */ 1642 { 1643 h->got.offset = htab->elf.sgot->size; 1644 htab->elf.sgot->size += GOT_ENTRY_SIZE; 1645 } 1646 else 1647 h->got.offset = (bfd_vma) -1; 1648 } 1649 else if (h->got.refcount > 0) 1650 { 1651 asection *s; 1652 bfd_boolean dyn; 1653 int tls_type = elf_s390_hash_entry(h)->tls_type; 1654 1655 /* Make sure this symbol is output as a dynamic symbol. 1656 Undefined weak syms won't yet be marked as dynamic. */ 1657 if (h->dynindx == -1 1658 && !h->forced_local) 1659 { 1660 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1661 return FALSE; 1662 } 1663 1664 s = htab->elf.sgot; 1665 h->got.offset = s->size; 1666 s->size += GOT_ENTRY_SIZE; 1667 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */ 1668 if (tls_type == GOT_TLS_GD) 1669 s->size += GOT_ENTRY_SIZE; 1670 dyn = htab->elf.dynamic_sections_created; 1671 /* R_390_TLS_IE64 needs one dynamic relocation, 1672 R_390_TLS_GD64 needs one if local symbol and two if global. */ 1673 if ((tls_type == GOT_TLS_GD && h->dynindx == -1) 1674 || tls_type >= GOT_TLS_IE) 1675 htab->elf.srelgot->size += sizeof (Elf64_External_Rela); 1676 else if (tls_type == GOT_TLS_GD) 1677 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela); 1678 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h) 1679 && (bfd_link_pic (info) 1680 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) 1681 htab->elf.srelgot->size += sizeof (Elf64_External_Rela); 1682 } 1683 else 1684 h->got.offset = (bfd_vma) -1; 1685 1686 if (eh->dyn_relocs == NULL) 1687 return TRUE; 1688 1689 /* In the shared -Bsymbolic case, discard space allocated for 1690 dynamic pc-relative relocs against symbols which turn out to be 1691 defined in regular objects. For the normal shared case, discard 1692 space for pc-relative relocs that have become local due to symbol 1693 visibility changes. */ 1694 1695 if (bfd_link_pic (info)) 1696 { 1697 if (SYMBOL_CALLS_LOCAL (info, h)) 1698 { 1699 struct elf_dyn_relocs **pp; 1700 1701 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 1702 { 1703 p->count -= p->pc_count; 1704 p->pc_count = 0; 1705 if (p->count == 0) 1706 *pp = p->next; 1707 else 1708 pp = &p->next; 1709 } 1710 } 1711 1712 /* Also discard relocs on undefined weak syms with non-default 1713 visibility. */ 1714 if (eh->dyn_relocs != NULL 1715 && h->root.type == bfd_link_hash_undefweak) 1716 { 1717 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 1718 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) 1719 eh->dyn_relocs = NULL; 1720 1721 /* Make sure undefined weak symbols are output as a dynamic 1722 symbol in PIEs. */ 1723 else if (h->dynindx == -1 1724 && !h->forced_local) 1725 { 1726 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1727 return FALSE; 1728 } 1729 } 1730 } 1731 else if (ELIMINATE_COPY_RELOCS) 1732 { 1733 /* For the non-shared case, discard space for relocs against 1734 symbols which turn out to need copy relocs or are not 1735 dynamic. */ 1736 1737 if (!h->non_got_ref 1738 && ((h->def_dynamic 1739 && !h->def_regular) 1740 || (htab->elf.dynamic_sections_created 1741 && (h->root.type == bfd_link_hash_undefweak 1742 || h->root.type == bfd_link_hash_undefined)))) 1743 { 1744 /* Make sure this symbol is output as a dynamic symbol. 1745 Undefined weak syms won't yet be marked as dynamic. */ 1746 if (h->dynindx == -1 1747 && !h->forced_local) 1748 { 1749 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1750 return FALSE; 1751 } 1752 1753 /* If that succeeded, we know we'll be keeping all the 1754 relocs. */ 1755 if (h->dynindx != -1) 1756 goto keep; 1757 } 1758 1759 eh->dyn_relocs = NULL; 1760 1761 keep: ; 1762 } 1763 1764 /* Finally, allocate space. */ 1765 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1766 { 1767 asection *sreloc = elf_section_data (p->sec)->sreloc; 1768 sreloc->size += p->count * sizeof (Elf64_External_Rela); 1769 } 1770 1771 return TRUE; 1772 } 1773 1774 /* Set DF_TEXTREL if we find any dynamic relocs that apply to 1775 read-only sections. */ 1776 1777 static bfd_boolean 1778 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p) 1779 { 1780 asection *sec; 1781 1782 if (h->root.type == bfd_link_hash_indirect) 1783 return TRUE; 1784 1785 sec = readonly_dynrelocs (h); 1786 if (sec != NULL) 1787 { 1788 struct bfd_link_info *info = (struct bfd_link_info *) info_p; 1789 1790 info->flags |= DF_TEXTREL; 1791 info->callbacks->minfo 1792 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"), 1793 sec->owner, h->root.root.string, sec); 1794 1795 /* Not an error, just cut short the traversal. */ 1796 return FALSE; 1797 } 1798 return TRUE; 1799 } 1800 1801 /* Set the sizes of the dynamic sections. */ 1802 1803 static bfd_boolean 1804 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 1805 struct bfd_link_info *info) 1806 { 1807 struct elf_s390_link_hash_table *htab; 1808 bfd *dynobj; 1809 asection *s; 1810 bfd_boolean relocs; 1811 bfd *ibfd; 1812 1813 htab = elf_s390_hash_table (info); 1814 if (htab == NULL) 1815 return FALSE; 1816 1817 dynobj = htab->elf.dynobj; 1818 if (dynobj == NULL) 1819 abort (); 1820 1821 if (htab->elf.dynamic_sections_created) 1822 { 1823 /* Set the contents of the .interp section to the interpreter. */ 1824 if (bfd_link_executable (info) && !info->nointerp) 1825 { 1826 s = bfd_get_linker_section (dynobj, ".interp"); 1827 if (s == NULL) 1828 abort (); 1829 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 1830 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 1831 } 1832 } 1833 1834 /* Set up .got offsets for local syms, and space for local dynamic 1835 relocs. */ 1836 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 1837 { 1838 bfd_signed_vma *local_got; 1839 bfd_signed_vma *end_local_got; 1840 char *local_tls_type; 1841 bfd_size_type locsymcount; 1842 Elf_Internal_Shdr *symtab_hdr; 1843 asection *srela; 1844 struct plt_entry *local_plt; 1845 unsigned int i; 1846 1847 if (! is_s390_elf (ibfd)) 1848 continue; 1849 1850 for (s = ibfd->sections; s != NULL; s = s->next) 1851 { 1852 struct elf_dyn_relocs *p; 1853 1854 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) 1855 { 1856 if (!bfd_is_abs_section (p->sec) 1857 && bfd_is_abs_section (p->sec->output_section)) 1858 { 1859 /* Input section has been discarded, either because 1860 it is a copy of a linkonce section or due to 1861 linker script /DISCARD/, so we'll be discarding 1862 the relocs too. */ 1863 } 1864 else if (p->count != 0) 1865 { 1866 srela = elf_section_data (p->sec)->sreloc; 1867 srela->size += p->count * sizeof (Elf64_External_Rela); 1868 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 1869 info->flags |= DF_TEXTREL; 1870 } 1871 } 1872 } 1873 1874 local_got = elf_local_got_refcounts (ibfd); 1875 if (!local_got) 1876 continue; 1877 1878 symtab_hdr = &elf_symtab_hdr (ibfd); 1879 locsymcount = symtab_hdr->sh_info; 1880 end_local_got = local_got + locsymcount; 1881 local_tls_type = elf_s390_local_got_tls_type (ibfd); 1882 s = htab->elf.sgot; 1883 srela = htab->elf.srelgot; 1884 for (; local_got < end_local_got; ++local_got, ++local_tls_type) 1885 { 1886 if (*local_got > 0) 1887 { 1888 *local_got = s->size; 1889 s->size += GOT_ENTRY_SIZE; 1890 if (*local_tls_type == GOT_TLS_GD) 1891 s->size += GOT_ENTRY_SIZE; 1892 if (bfd_link_pic (info)) 1893 srela->size += sizeof (Elf64_External_Rela); 1894 } 1895 else 1896 *local_got = (bfd_vma) -1; 1897 } 1898 1899 local_plt = elf_s390_local_plt (ibfd); 1900 for (i = 0; i < symtab_hdr->sh_info; i++) 1901 { 1902 if (local_plt[i].plt.refcount > 0) 1903 { 1904 local_plt[i].plt.offset = htab->elf.iplt->size; 1905 htab->elf.iplt->size += PLT_ENTRY_SIZE; 1906 htab->elf.igotplt->size += GOT_ENTRY_SIZE; 1907 htab->elf.irelplt->size += sizeof (Elf64_External_Rela); 1908 } 1909 else 1910 local_plt[i].plt.offset = (bfd_vma) -1; 1911 } 1912 } 1913 1914 if (htab->tls_ldm_got.refcount > 0) 1915 { 1916 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64 1917 relocs. */ 1918 htab->tls_ldm_got.offset = htab->elf.sgot->size; 1919 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; 1920 htab->elf.srelgot->size += sizeof (Elf64_External_Rela); 1921 } 1922 else 1923 htab->tls_ldm_got.offset = -1; 1924 1925 /* Allocate global sym .plt and .got entries, and space for global 1926 sym dynamic relocs. */ 1927 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); 1928 1929 /* We now have determined the sizes of the various dynamic sections. 1930 Allocate memory for them. */ 1931 relocs = FALSE; 1932 for (s = dynobj->sections; s != NULL; s = s->next) 1933 { 1934 if ((s->flags & SEC_LINKER_CREATED) == 0) 1935 continue; 1936 1937 if (s == htab->elf.splt 1938 || s == htab->elf.sgot 1939 || s == htab->elf.sgotplt 1940 || s == htab->elf.sdynbss 1941 || s == htab->elf.sdynrelro 1942 || s == htab->elf.iplt 1943 || s == htab->elf.igotplt 1944 || s == htab->irelifunc) 1945 { 1946 /* Strip this section if we don't need it; see the 1947 comment below. */ 1948 } 1949 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) 1950 { 1951 if (s->size != 0 && s != htab->elf.srelplt) 1952 relocs = TRUE; 1953 1954 /* We use the reloc_count field as a counter if we need 1955 to copy relocs into the output file. */ 1956 s->reloc_count = 0; 1957 } 1958 else 1959 { 1960 /* It's not one of our sections, so don't allocate space. */ 1961 continue; 1962 } 1963 1964 if (s->size == 0) 1965 { 1966 /* If we don't need this section, strip it from the 1967 output file. This is to handle .rela.bss and 1968 .rela.plt. We must create it in 1969 create_dynamic_sections, because it must be created 1970 before the linker maps input sections to output 1971 sections. The linker does that before 1972 adjust_dynamic_symbol is called, and it is that 1973 function which decides whether anything needs to go 1974 into these sections. */ 1975 1976 s->flags |= SEC_EXCLUDE; 1977 continue; 1978 } 1979 1980 if ((s->flags & SEC_HAS_CONTENTS) == 0) 1981 continue; 1982 1983 /* Allocate memory for the section contents. We use bfd_zalloc 1984 here in case unused entries are not reclaimed before the 1985 section's contents are written out. This should not happen, 1986 but this way if it does, we get a R_390_NONE reloc instead 1987 of garbage. */ 1988 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 1989 if (s->contents == NULL) 1990 return FALSE; 1991 } 1992 1993 if (htab->elf.dynamic_sections_created) 1994 { 1995 /* Add some entries to the .dynamic section. We fill in the 1996 values later, in elf_s390_finish_dynamic_sections, but we 1997 must add the entries now so that we get the correct size for 1998 the .dynamic section. The DT_DEBUG entry is filled in by the 1999 dynamic linker and used by the debugger. */ 2000 #define add_dynamic_entry(TAG, VAL) \ 2001 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2002 2003 if (bfd_link_executable (info)) 2004 { 2005 if (!add_dynamic_entry (DT_DEBUG, 0)) 2006 return FALSE; 2007 } 2008 2009 if (htab->elf.splt->size != 0) 2010 { 2011 if (!add_dynamic_entry (DT_PLTGOT, 0) 2012 || !add_dynamic_entry (DT_PLTRELSZ, 0) 2013 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 2014 || !add_dynamic_entry (DT_JMPREL, 0)) 2015 return FALSE; 2016 } 2017 2018 if (relocs) 2019 { 2020 if (!add_dynamic_entry (DT_RELA, 0) 2021 || !add_dynamic_entry (DT_RELASZ, 0) 2022 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) 2023 return FALSE; 2024 2025 /* If any dynamic relocs apply to a read-only section, 2026 then we need a DT_TEXTREL entry. */ 2027 if ((info->flags & DF_TEXTREL) == 0) 2028 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info); 2029 2030 if ((info->flags & DF_TEXTREL) != 0) 2031 { 2032 if (!add_dynamic_entry (DT_TEXTREL, 0)) 2033 return FALSE; 2034 } 2035 } 2036 } 2037 #undef add_dynamic_entry 2038 2039 return TRUE; 2040 } 2041 2042 /* Return the base VMA address which should be subtracted from real addresses 2043 when resolving @dtpoff relocation. 2044 This is PT_TLS segment p_vaddr. */ 2045 2046 static bfd_vma 2047 dtpoff_base (struct bfd_link_info *info) 2048 { 2049 /* If tls_sec is NULL, we should have signalled an error already. */ 2050 if (elf_hash_table (info)->tls_sec == NULL) 2051 return 0; 2052 return elf_hash_table (info)->tls_sec->vma; 2053 } 2054 2055 /* Return the relocation value for @tpoff relocation 2056 if STT_TLS virtual address is ADDRESS. */ 2057 2058 static bfd_vma 2059 tpoff (struct bfd_link_info *info, bfd_vma address) 2060 { 2061 struct elf_link_hash_table *htab = elf_hash_table (info); 2062 2063 /* If tls_sec is NULL, we should have signalled an error already. */ 2064 if (htab->tls_sec == NULL) 2065 return 0; 2066 return htab->tls_size + htab->tls_sec->vma - address; 2067 } 2068 2069 /* Complain if TLS instruction relocation is against an invalid 2070 instruction. */ 2071 2072 static void 2073 invalid_tls_insn (bfd *input_bfd, 2074 asection *input_section, 2075 Elf_Internal_Rela *rel) 2076 { 2077 reloc_howto_type *howto; 2078 2079 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info); 2080 _bfd_error_handler 2081 /* xgettext:c-format */ 2082 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"), 2083 input_bfd, 2084 input_section, 2085 (uint64_t) rel->r_offset, 2086 howto->name); 2087 bfd_set_error (bfd_error_bad_value); 2088 } 2089 2090 /* Relocate a 390 ELF section. */ 2091 2092 static bfd_boolean 2093 elf_s390_relocate_section (bfd *output_bfd, 2094 struct bfd_link_info *info, 2095 bfd *input_bfd, 2096 asection *input_section, 2097 bfd_byte *contents, 2098 Elf_Internal_Rela *relocs, 2099 Elf_Internal_Sym *local_syms, 2100 asection **local_sections) 2101 { 2102 struct elf_s390_link_hash_table *htab; 2103 Elf_Internal_Shdr *symtab_hdr; 2104 struct elf_link_hash_entry **sym_hashes; 2105 bfd_vma *local_got_offsets; 2106 Elf_Internal_Rela *rel; 2107 Elf_Internal_Rela *relend; 2108 2109 BFD_ASSERT (is_s390_elf (input_bfd)); 2110 2111 htab = elf_s390_hash_table (info); 2112 if (htab == NULL) 2113 return FALSE; 2114 2115 symtab_hdr = &elf_symtab_hdr (input_bfd); 2116 sym_hashes = elf_sym_hashes (input_bfd); 2117 local_got_offsets = elf_local_got_offsets (input_bfd); 2118 2119 rel = relocs; 2120 relend = relocs + input_section->reloc_count; 2121 for (; rel < relend; rel++) 2122 { 2123 unsigned int r_type; 2124 reloc_howto_type *howto; 2125 unsigned long r_symndx; 2126 struct elf_link_hash_entry *h; 2127 Elf_Internal_Sym *sym; 2128 asection *sec; 2129 bfd_vma off; 2130 bfd_vma relocation; 2131 bfd_boolean unresolved_reloc; 2132 bfd_reloc_status_type r; 2133 int tls_type; 2134 asection *base_got = htab->elf.sgot; 2135 bfd_boolean resolved_to_zero; 2136 2137 r_type = ELF64_R_TYPE (rel->r_info); 2138 if (r_type == (int) R_390_GNU_VTINHERIT 2139 || r_type == (int) R_390_GNU_VTENTRY) 2140 continue; 2141 if (r_type >= (int) R_390_max) 2142 { 2143 bfd_set_error (bfd_error_bad_value); 2144 return FALSE; 2145 } 2146 2147 howto = elf_howto_table + r_type; 2148 r_symndx = ELF64_R_SYM (rel->r_info); 2149 2150 h = NULL; 2151 sym = NULL; 2152 sec = NULL; 2153 unresolved_reloc = FALSE; 2154 if (r_symndx < symtab_hdr->sh_info) 2155 { 2156 sym = local_syms + r_symndx; 2157 sec = local_sections[r_symndx]; 2158 2159 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 2160 { 2161 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd); 2162 if (local_plt == NULL) 2163 return FALSE; 2164 2165 /* Address of the PLT slot. */ 2166 relocation = (htab->elf.iplt->output_section->vma 2167 + htab->elf.iplt->output_offset 2168 + local_plt[r_symndx].plt.offset); 2169 2170 switch (r_type) 2171 { 2172 case R_390_PLTOFF16: 2173 case R_390_PLTOFF32: 2174 case R_390_PLTOFF64: 2175 relocation -= htab->elf.sgot->output_section->vma; 2176 break; 2177 case R_390_GOTPLT12: 2178 case R_390_GOTPLT16: 2179 case R_390_GOTPLT20: 2180 case R_390_GOTPLT32: 2181 case R_390_GOTPLT64: 2182 case R_390_GOTPLTENT: 2183 case R_390_GOT12: 2184 case R_390_GOT16: 2185 case R_390_GOT20: 2186 case R_390_GOT32: 2187 case R_390_GOT64: 2188 case R_390_GOTENT: 2189 { 2190 /* Write the PLT slot address into the GOT slot. */ 2191 bfd_put_64 (output_bfd, relocation, 2192 htab->elf.sgot->contents + 2193 local_got_offsets[r_symndx]); 2194 relocation = (local_got_offsets[r_symndx] + 2195 htab->elf.sgot->output_offset); 2196 2197 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) 2198 relocation += htab->elf.sgot->output_section->vma; 2199 break; 2200 } 2201 default: 2202 break; 2203 } 2204 /* The output section is needed later in 2205 finish_dynamic_section when creating the dynamic 2206 relocation. */ 2207 local_plt[r_symndx].sec = sec; 2208 goto do_relocation; 2209 } 2210 else 2211 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2212 } 2213 else 2214 { 2215 bfd_boolean warned ATTRIBUTE_UNUSED; 2216 bfd_boolean ignored ATTRIBUTE_UNUSED; 2217 2218 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 2219 r_symndx, symtab_hdr, sym_hashes, 2220 h, sec, relocation, 2221 unresolved_reloc, warned, ignored); 2222 } 2223 2224 if (sec != NULL && discarded_section (sec)) 2225 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2226 rel, 1, relend, howto, 0, contents); 2227 2228 if (bfd_link_relocatable (info)) 2229 continue; 2230 2231 resolved_to_zero = (h != NULL 2232 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); 2233 2234 switch (r_type) 2235 { 2236 case R_390_GOTPLT12: 2237 case R_390_GOTPLT16: 2238 case R_390_GOTPLT20: 2239 case R_390_GOTPLT32: 2240 case R_390_GOTPLT64: 2241 case R_390_GOTPLTENT: 2242 /* There are three cases for a GOTPLT relocation. 1) The 2243 relocation is against the jump slot entry of a plt that 2244 will get emitted to the output file. 2) The relocation 2245 is against the jump slot of a plt entry that has been 2246 removed. elf_s390_adjust_gotplt has created a GOT entry 2247 as replacement. 3) The relocation is against a local symbol. 2248 Cases 2) and 3) are the same as the GOT relocation code 2249 so we just have to test for case 1 and fall through for 2250 the other two. */ 2251 if (h != NULL && h->plt.offset != (bfd_vma) -1) 2252 { 2253 bfd_vma plt_index; 2254 2255 if (s390_is_ifunc_symbol_p (h)) 2256 { 2257 plt_index = h->plt.offset / PLT_ENTRY_SIZE; 2258 relocation = (plt_index * GOT_ENTRY_SIZE + 2259 htab->elf.igotplt->output_offset); 2260 if (r_type == R_390_GOTPLTENT) 2261 relocation += htab->elf.igotplt->output_section->vma; 2262 } 2263 else 2264 { 2265 /* Calc. index no. 2266 Current offset - size first entry / entry size. */ 2267 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / 2268 PLT_ENTRY_SIZE; 2269 2270 /* Offset in GOT is PLT index plus GOT headers(3) 2271 times 8, addr & GOT addr. */ 2272 relocation = (plt_index + 3) * GOT_ENTRY_SIZE; 2273 if (r_type == R_390_GOTPLTENT) 2274 relocation += htab->elf.sgot->output_section->vma; 2275 } 2276 unresolved_reloc = FALSE; 2277 break; 2278 } 2279 /* Fall through. */ 2280 2281 case R_390_GOT12: 2282 case R_390_GOT16: 2283 case R_390_GOT20: 2284 case R_390_GOT32: 2285 case R_390_GOT64: 2286 case R_390_GOTENT: 2287 /* Relocation is to the entry for this symbol in the global 2288 offset table. */ 2289 if (base_got == NULL) 2290 abort (); 2291 2292 if (h != NULL) 2293 { 2294 bfd_boolean dyn; 2295 2296 off = h->got.offset; 2297 dyn = htab->elf.dynamic_sections_created; 2298 2299 if (s390_is_ifunc_symbol_p (h)) 2300 { 2301 BFD_ASSERT (h->plt.offset != (bfd_vma) -1); 2302 if (off == (bfd_vma)-1) 2303 { 2304 /* No explicit GOT usage so redirect to the 2305 got.iplt slot. */ 2306 base_got = htab->elf.igotplt; 2307 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE; 2308 } 2309 else 2310 { 2311 /* Explicit GOT slots must contain the address 2312 of the PLT slot. This will be handled in 2313 finish_dynamic_symbol. */ 2314 } 2315 } 2316 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 2317 bfd_link_pic (info), 2318 h) 2319 || (bfd_link_pic (info) 2320 && SYMBOL_REFERENCES_LOCAL (info, h)) 2321 || resolved_to_zero) 2322 { 2323 /* This is actually a static link, or it is a 2324 -Bsymbolic link and the symbol is defined 2325 locally, or the symbol was forced to be local 2326 because of a version file. We must initialize 2327 this entry in the global offset table. Since the 2328 offset must always be a multiple of 2, we use the 2329 least significant bit to record whether we have 2330 initialized it already. 2331 2332 When doing a dynamic link, we create a .rel.got 2333 relocation entry to initialize the value. This 2334 is done in the finish_dynamic_symbol routine. */ 2335 if ((off & 1) != 0) 2336 off &= ~1; 2337 else 2338 { 2339 bfd_put_64 (output_bfd, relocation, 2340 base_got->contents + off); 2341 h->got.offset |= 1; 2342 } 2343 2344 if ((h->def_regular 2345 && bfd_link_pic (info) 2346 && SYMBOL_REFERENCES_LOCAL (info, h)) 2347 /* lgrl rx,sym@GOTENT -> larl rx, sym */ 2348 && ((r_type == R_390_GOTENT 2349 && (bfd_get_16 (input_bfd, 2350 contents + rel->r_offset - 2) 2351 & 0xff0f) == 0xc408) 2352 /* lg rx, sym@GOT(r12) -> larl rx, sym */ 2353 || (r_type == R_390_GOT20 2354 && (bfd_get_32 (input_bfd, 2355 contents + rel->r_offset - 2) 2356 & 0xff00f000) == 0xe300c000 2357 && bfd_get_8 (input_bfd, 2358 contents + rel->r_offset + 3) == 0x04))) 2359 2360 { 2361 unsigned short new_insn = 2362 (0xc000 | (bfd_get_8 (input_bfd, 2363 contents + rel->r_offset - 1) & 0xf0)); 2364 bfd_put_16 (output_bfd, new_insn, 2365 contents + rel->r_offset - 2); 2366 r_type = R_390_PC32DBL; 2367 rel->r_addend = 2; 2368 howto = elf_howto_table + r_type; 2369 relocation = h->root.u.def.value 2370 + h->root.u.def.section->output_section->vma 2371 + h->root.u.def.section->output_offset; 2372 goto do_relocation; 2373 } 2374 } 2375 else 2376 unresolved_reloc = FALSE; 2377 } 2378 else 2379 { 2380 if (local_got_offsets == NULL) 2381 abort (); 2382 2383 off = local_got_offsets[r_symndx]; 2384 2385 /* The offset must always be a multiple of 8. We use 2386 the least significant bit to record whether we have 2387 already generated the necessary reloc. */ 2388 if ((off & 1) != 0) 2389 off &= ~1; 2390 else 2391 { 2392 bfd_put_64 (output_bfd, relocation, 2393 htab->elf.sgot->contents + off); 2394 2395 if (bfd_link_pic (info)) 2396 { 2397 asection *s; 2398 Elf_Internal_Rela outrel; 2399 bfd_byte *loc; 2400 2401 s = htab->elf.srelgot; 2402 if (s == NULL) 2403 abort (); 2404 2405 outrel.r_offset = (htab->elf.sgot->output_section->vma 2406 + htab->elf.sgot->output_offset 2407 + off); 2408 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 2409 outrel.r_addend = relocation; 2410 loc = s->contents; 2411 loc += s->reloc_count++ * sizeof (Elf64_External_Rela); 2412 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2413 } 2414 2415 local_got_offsets[r_symndx] |= 1; 2416 } 2417 } 2418 2419 if (off >= (bfd_vma) -2) 2420 abort (); 2421 2422 relocation = base_got->output_offset + off; 2423 2424 /* For @GOTENT the relocation is against the offset between 2425 the instruction and the symbols entry in the GOT and not 2426 between the start of the GOT and the symbols entry. We 2427 add the vma of the GOT to get the correct value. */ 2428 if ( r_type == R_390_GOTENT 2429 || r_type == R_390_GOTPLTENT) 2430 relocation += base_got->output_section->vma; 2431 2432 break; 2433 2434 case R_390_GOTOFF16: 2435 case R_390_GOTOFF32: 2436 case R_390_GOTOFF64: 2437 /* Relocation is relative to the start of the global offset 2438 table. */ 2439 2440 if (h != NULL 2441 && s390_is_ifunc_symbol_p (h) 2442 && h->def_regular 2443 && !bfd_link_executable (info)) 2444 { 2445 relocation = (htab->elf.iplt->output_section->vma 2446 + htab->elf.iplt->output_offset 2447 + h->plt.offset 2448 - htab->elf.sgot->output_section->vma); 2449 goto do_relocation; 2450 } 2451 2452 /* Note that sgot->output_offset is not involved in this 2453 calculation. We always want the start of .got. If we 2454 defined _GLOBAL_OFFSET_TABLE in a different way, as is 2455 permitted by the ABI, we might have to change this 2456 calculation. */ 2457 relocation -= htab->elf.sgot->output_section->vma; 2458 break; 2459 2460 case R_390_GOTPC: 2461 case R_390_GOTPCDBL: 2462 /* Use global offset table as symbol value. */ 2463 relocation = htab->elf.sgot->output_section->vma; 2464 unresolved_reloc = FALSE; 2465 break; 2466 2467 case R_390_PLT12DBL: 2468 case R_390_PLT16DBL: 2469 case R_390_PLT24DBL: 2470 case R_390_PLT32: 2471 case R_390_PLT32DBL: 2472 case R_390_PLT64: 2473 /* Relocation is to the entry for this symbol in the 2474 procedure linkage table. */ 2475 2476 /* Resolve a PLT32 reloc against a local symbol directly, 2477 without using the procedure linkage table. */ 2478 if (h == NULL) 2479 break; 2480 2481 if (h->plt.offset == (bfd_vma) -1 2482 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) 2483 { 2484 /* We didn't make a PLT entry for this symbol. This 2485 happens when statically linking PIC code, or when 2486 using -Bsymbolic. */ 2487 break; 2488 } 2489 if (s390_is_ifunc_symbol_p (h)) 2490 relocation = (htab->elf.iplt->output_section->vma 2491 + htab->elf.iplt->output_offset 2492 + h->plt.offset); 2493 else 2494 relocation = (htab->elf.splt->output_section->vma 2495 + htab->elf.splt->output_offset 2496 + h->plt.offset); 2497 unresolved_reloc = FALSE; 2498 break; 2499 2500 case R_390_PLTOFF16: 2501 case R_390_PLTOFF32: 2502 case R_390_PLTOFF64: 2503 /* Relocation is to the entry for this symbol in the 2504 procedure linkage table relative to the start of the GOT. */ 2505 2506 /* For local symbols or if we didn't make a PLT entry for 2507 this symbol resolve the symbol directly. */ 2508 if (h == NULL 2509 || h->plt.offset == (bfd_vma) -1 2510 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) 2511 { 2512 relocation -= htab->elf.sgot->output_section->vma; 2513 break; 2514 } 2515 2516 if (s390_is_ifunc_symbol_p (h)) 2517 relocation = (htab->elf.iplt->output_section->vma 2518 + htab->elf.iplt->output_offset 2519 + h->plt.offset 2520 - htab->elf.sgot->output_section->vma); 2521 else 2522 relocation = (htab->elf.splt->output_section->vma 2523 + htab->elf.splt->output_offset 2524 + h->plt.offset 2525 - htab->elf.sgot->output_section->vma); 2526 unresolved_reloc = FALSE; 2527 break; 2528 2529 case R_390_PC16: 2530 case R_390_PC12DBL: 2531 case R_390_PC16DBL: 2532 case R_390_PC24DBL: 2533 case R_390_PC32: 2534 case R_390_PC32DBL: 2535 case R_390_PC64: 2536 if (h != NULL 2537 && bfd_link_pie (info) 2538 && !h->def_regular) 2539 { 2540 _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined " 2541 "in shared library and accessed " 2542 "from executable " 2543 "(rebuild file with -fPIC ?)"), 2544 input_bfd, h->root.root.string); 2545 bfd_set_error (bfd_error_bad_value); 2546 return FALSE; 2547 } 2548 /* The target of these relocs are instruction operands 2549 residing in read-only sections. We cannot emit a runtime 2550 reloc for it. */ 2551 if (h != NULL 2552 && s390_is_ifunc_symbol_p (h) 2553 && h->def_regular 2554 && bfd_link_pic (info)) 2555 { 2556 relocation = (htab->elf.iplt->output_section->vma 2557 + htab->elf.iplt->output_offset 2558 + h->plt.offset); 2559 goto do_relocation; 2560 } 2561 /* Fall through. */ 2562 2563 case R_390_8: 2564 case R_390_16: 2565 case R_390_32: 2566 case R_390_64: 2567 2568 if ((input_section->flags & SEC_ALLOC) == 0) 2569 break; 2570 2571 if (h != NULL 2572 && s390_is_ifunc_symbol_p (h) 2573 && h->def_regular) 2574 { 2575 if (!bfd_link_pic (info)) 2576 { 2577 /* For a non-shared object the symbol will not 2578 change. Hence we can write the address of the 2579 target IPLT slot now. */ 2580 relocation = (htab->elf.iplt->output_section->vma 2581 + htab->elf.iplt->output_offset 2582 + h ->plt.offset); 2583 goto do_relocation; 2584 } 2585 else 2586 { 2587 /* For shared objects a runtime relocation is needed. */ 2588 2589 Elf_Internal_Rela outrel; 2590 asection *sreloc; 2591 2592 /* Need a dynamic relocation to get the real function 2593 address. */ 2594 outrel.r_offset = _bfd_elf_section_offset (output_bfd, 2595 info, 2596 input_section, 2597 rel->r_offset); 2598 if (outrel.r_offset == (bfd_vma) -1 2599 || outrel.r_offset == (bfd_vma) -2) 2600 abort (); 2601 2602 outrel.r_offset += (input_section->output_section->vma 2603 + input_section->output_offset); 2604 2605 if (h->dynindx == -1 2606 || h->forced_local 2607 || bfd_link_executable (info)) 2608 { 2609 /* This symbol is resolved locally. */ 2610 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE); 2611 outrel.r_addend = (h->root.u.def.value 2612 + h->root.u.def.section->output_section->vma 2613 + h->root.u.def.section->output_offset); 2614 } 2615 else 2616 { 2617 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); 2618 outrel.r_addend = 0; 2619 } 2620 2621 sreloc = htab->elf.irelifunc; 2622 elf_append_rela (output_bfd, sreloc, &outrel); 2623 2624 /* If this reloc is against an external symbol, we 2625 do not want to fiddle with the addend. Otherwise, 2626 we need to include the symbol value so that it 2627 becomes an addend for the dynamic reloc. For an 2628 internal symbol, we have updated addend. */ 2629 continue; 2630 } 2631 } 2632 2633 if ((bfd_link_pic (info) 2634 && (h == NULL 2635 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 2636 && !resolved_to_zero) 2637 || h->root.type != bfd_link_hash_undefweak) 2638 && ((r_type != R_390_PC16 2639 && r_type != R_390_PC12DBL 2640 && r_type != R_390_PC16DBL 2641 && r_type != R_390_PC24DBL 2642 && r_type != R_390_PC32 2643 && r_type != R_390_PC32DBL 2644 && r_type != R_390_PC64) 2645 || !SYMBOL_CALLS_LOCAL (info, h))) 2646 || (ELIMINATE_COPY_RELOCS 2647 && !bfd_link_pic (info) 2648 && h != NULL 2649 && h->dynindx != -1 2650 && !h->non_got_ref 2651 && ((h->def_dynamic 2652 && !h->def_regular) 2653 || h->root.type == bfd_link_hash_undefweak 2654 || h->root.type == bfd_link_hash_undefined))) 2655 { 2656 Elf_Internal_Rela outrel; 2657 bfd_boolean skip, relocate; 2658 asection *sreloc; 2659 bfd_byte *loc; 2660 2661 /* When generating a shared object, these relocations 2662 are copied into the output file to be resolved at run 2663 time. */ 2664 skip = FALSE; 2665 relocate = FALSE; 2666 2667 outrel.r_offset = 2668 _bfd_elf_section_offset (output_bfd, info, input_section, 2669 rel->r_offset); 2670 if (outrel.r_offset == (bfd_vma) -1) 2671 skip = TRUE; 2672 else if (outrel.r_offset == (bfd_vma) -2) 2673 skip = TRUE, relocate = TRUE; 2674 2675 outrel.r_offset += (input_section->output_section->vma 2676 + input_section->output_offset); 2677 2678 if (skip) 2679 memset (&outrel, 0, sizeof outrel); 2680 else if (h != NULL 2681 && h->dynindx != -1 2682 && (r_type == R_390_PC16 2683 || r_type == R_390_PC12DBL 2684 || r_type == R_390_PC16DBL 2685 || r_type == R_390_PC24DBL 2686 || r_type == R_390_PC32 2687 || r_type == R_390_PC32DBL 2688 || r_type == R_390_PC64 2689 || !bfd_link_pic (info) 2690 || !SYMBOLIC_BIND (info, h) 2691 || !h->def_regular)) 2692 { 2693 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); 2694 outrel.r_addend = rel->r_addend; 2695 } 2696 else 2697 { 2698 /* This symbol is local, or marked to become local. */ 2699 outrel.r_addend = relocation + rel->r_addend; 2700 if (r_type == R_390_64) 2701 { 2702 relocate = TRUE; 2703 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 2704 } 2705 else 2706 { 2707 long sindx; 2708 2709 if (bfd_is_abs_section (sec)) 2710 sindx = 0; 2711 else if (sec == NULL || sec->owner == NULL) 2712 { 2713 bfd_set_error(bfd_error_bad_value); 2714 return FALSE; 2715 } 2716 else 2717 { 2718 asection *osec; 2719 2720 osec = sec->output_section; 2721 sindx = elf_section_data (osec)->dynindx; 2722 2723 if (sindx == 0) 2724 { 2725 osec = htab->elf.text_index_section; 2726 sindx = elf_section_data (osec)->dynindx; 2727 } 2728 BFD_ASSERT (sindx != 0); 2729 2730 /* We are turning this relocation into one 2731 against a section symbol, so subtract out 2732 the output section's address but not the 2733 offset of the input section in the output 2734 section. */ 2735 outrel.r_addend -= osec->vma; 2736 } 2737 outrel.r_info = ELF64_R_INFO (sindx, r_type); 2738 } 2739 } 2740 2741 sreloc = elf_section_data (input_section)->sreloc; 2742 if (sreloc == NULL) 2743 abort (); 2744 2745 loc = sreloc->contents; 2746 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 2747 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2748 2749 /* If this reloc is against an external symbol, we do 2750 not want to fiddle with the addend. Otherwise, we 2751 need to include the symbol value so that it becomes 2752 an addend for the dynamic reloc. */ 2753 if (! relocate) 2754 continue; 2755 } 2756 2757 break; 2758 2759 /* Relocations for tls literal pool entries. */ 2760 case R_390_TLS_IE64: 2761 if (bfd_link_pic (info)) 2762 { 2763 Elf_Internal_Rela outrel; 2764 asection *sreloc; 2765 bfd_byte *loc; 2766 2767 outrel.r_offset = rel->r_offset 2768 + input_section->output_section->vma 2769 + input_section->output_offset; 2770 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 2771 sreloc = elf_section_data (input_section)->sreloc; 2772 if (sreloc == NULL) 2773 abort (); 2774 loc = sreloc->contents; 2775 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 2776 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc); 2777 } 2778 /* Fall through. */ 2779 2780 case R_390_TLS_GD64: 2781 case R_390_TLS_GOTIE64: 2782 r_type = elf_s390_tls_transition (info, r_type, h == NULL); 2783 tls_type = GOT_UNKNOWN; 2784 if (h == NULL && local_got_offsets) 2785 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 2786 else if (h != NULL) 2787 { 2788 tls_type = elf_s390_hash_entry(h)->tls_type; 2789 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE) 2790 r_type = R_390_TLS_LE64; 2791 } 2792 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE) 2793 r_type = R_390_TLS_IE64; 2794 2795 if (r_type == R_390_TLS_LE64) 2796 { 2797 /* This relocation gets optimized away by the local exec 2798 access optimization. */ 2799 BFD_ASSERT (! unresolved_reloc); 2800 bfd_put_64 (output_bfd, -tpoff (info, relocation), 2801 contents + rel->r_offset); 2802 continue; 2803 } 2804 2805 if (htab->elf.sgot == NULL) 2806 abort (); 2807 2808 if (h != NULL) 2809 off = h->got.offset; 2810 else 2811 { 2812 if (local_got_offsets == NULL) 2813 abort (); 2814 2815 off = local_got_offsets[r_symndx]; 2816 } 2817 2818 emit_tls_relocs: 2819 2820 if ((off & 1) != 0) 2821 off &= ~1; 2822 else 2823 { 2824 Elf_Internal_Rela outrel; 2825 bfd_byte *loc; 2826 int dr_type, indx; 2827 2828 if (htab->elf.srelgot == NULL) 2829 abort (); 2830 2831 outrel.r_offset = (htab->elf.sgot->output_section->vma 2832 + htab->elf.sgot->output_offset + off); 2833 2834 indx = h && h->dynindx != -1 ? h->dynindx : 0; 2835 if (r_type == R_390_TLS_GD64) 2836 dr_type = R_390_TLS_DTPMOD; 2837 else 2838 dr_type = R_390_TLS_TPOFF; 2839 if (dr_type == R_390_TLS_TPOFF && indx == 0) 2840 outrel.r_addend = relocation - dtpoff_base (info); 2841 else 2842 outrel.r_addend = 0; 2843 outrel.r_info = ELF64_R_INFO (indx, dr_type); 2844 loc = htab->elf.srelgot->contents; 2845 loc += htab->elf.srelgot->reloc_count++ 2846 * sizeof (Elf64_External_Rela); 2847 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2848 2849 if (r_type == R_390_TLS_GD64) 2850 { 2851 if (indx == 0) 2852 { 2853 BFD_ASSERT (! unresolved_reloc); 2854 bfd_put_64 (output_bfd, 2855 relocation - dtpoff_base (info), 2856 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); 2857 } 2858 else 2859 { 2860 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF); 2861 outrel.r_offset += GOT_ENTRY_SIZE; 2862 outrel.r_addend = 0; 2863 htab->elf.srelgot->reloc_count++; 2864 loc += sizeof (Elf64_External_Rela); 2865 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2866 } 2867 } 2868 2869 if (h != NULL) 2870 h->got.offset |= 1; 2871 else 2872 local_got_offsets[r_symndx] |= 1; 2873 } 2874 2875 if (off >= (bfd_vma) -2) 2876 abort (); 2877 if (r_type == ELF64_R_TYPE (rel->r_info)) 2878 { 2879 relocation = htab->elf.sgot->output_offset + off; 2880 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT) 2881 relocation += htab->elf.sgot->output_section->vma; 2882 unresolved_reloc = FALSE; 2883 } 2884 else 2885 { 2886 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off, 2887 contents + rel->r_offset); 2888 continue; 2889 } 2890 break; 2891 2892 case R_390_TLS_GOTIE12: 2893 case R_390_TLS_GOTIE20: 2894 case R_390_TLS_IEENT: 2895 if (h == NULL) 2896 { 2897 if (local_got_offsets == NULL) 2898 abort(); 2899 off = local_got_offsets[r_symndx]; 2900 if (bfd_link_pic (info)) 2901 goto emit_tls_relocs; 2902 } 2903 else 2904 { 2905 off = h->got.offset; 2906 tls_type = elf_s390_hash_entry(h)->tls_type; 2907 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE) 2908 goto emit_tls_relocs; 2909 } 2910 2911 if (htab->elf.sgot == NULL) 2912 abort (); 2913 2914 BFD_ASSERT (! unresolved_reloc); 2915 bfd_put_64 (output_bfd, -tpoff (info, relocation), 2916 htab->elf.sgot->contents + off); 2917 relocation = htab->elf.sgot->output_offset + off; 2918 if (r_type == R_390_TLS_IEENT) 2919 relocation += htab->elf.sgot->output_section->vma; 2920 unresolved_reloc = FALSE; 2921 break; 2922 2923 case R_390_TLS_LDM64: 2924 if (! bfd_link_pic (info)) 2925 /* The literal pool entry this relocation refers to gets ignored 2926 by the optimized code of the local exec model. Do nothing 2927 and the value will turn out zero. */ 2928 continue; 2929 2930 if (htab->elf.sgot == NULL) 2931 abort (); 2932 2933 off = htab->tls_ldm_got.offset; 2934 if (off & 1) 2935 off &= ~1; 2936 else 2937 { 2938 Elf_Internal_Rela outrel; 2939 bfd_byte *loc; 2940 2941 if (htab->elf.srelgot == NULL) 2942 abort (); 2943 2944 outrel.r_offset = (htab->elf.sgot->output_section->vma 2945 + htab->elf.sgot->output_offset + off); 2946 2947 bfd_put_64 (output_bfd, 0, 2948 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); 2949 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD); 2950 outrel.r_addend = 0; 2951 loc = htab->elf.srelgot->contents; 2952 loc += htab->elf.srelgot->reloc_count++ 2953 * sizeof (Elf64_External_Rela); 2954 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2955 htab->tls_ldm_got.offset |= 1; 2956 } 2957 relocation = htab->elf.sgot->output_offset + off; 2958 unresolved_reloc = FALSE; 2959 break; 2960 2961 case R_390_TLS_LE64: 2962 if (bfd_link_dll (info)) 2963 { 2964 /* Linking a shared library with non-fpic code requires 2965 a R_390_TLS_TPOFF relocation. */ 2966 Elf_Internal_Rela outrel; 2967 asection *sreloc; 2968 bfd_byte *loc; 2969 int indx; 2970 2971 outrel.r_offset = rel->r_offset 2972 + input_section->output_section->vma 2973 + input_section->output_offset; 2974 if (h != NULL && h->dynindx != -1) 2975 indx = h->dynindx; 2976 else 2977 indx = 0; 2978 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF); 2979 if (indx == 0) 2980 outrel.r_addend = relocation - dtpoff_base (info); 2981 else 2982 outrel.r_addend = 0; 2983 sreloc = elf_section_data (input_section)->sreloc; 2984 if (sreloc == NULL) 2985 abort (); 2986 loc = sreloc->contents; 2987 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 2988 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2989 } 2990 else 2991 { 2992 BFD_ASSERT (! unresolved_reloc); 2993 bfd_put_64 (output_bfd, -tpoff (info, relocation), 2994 contents + rel->r_offset); 2995 } 2996 continue; 2997 2998 case R_390_TLS_LDO64: 2999 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING)) 3000 relocation -= dtpoff_base (info); 3001 else 3002 /* When converting LDO to LE, we must negate. */ 3003 relocation = -tpoff (info, relocation); 3004 break; 3005 3006 /* Relocations for tls instructions. */ 3007 case R_390_TLS_LOAD: 3008 case R_390_TLS_GDCALL: 3009 case R_390_TLS_LDCALL: 3010 tls_type = GOT_UNKNOWN; 3011 if (h == NULL && local_got_offsets) 3012 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 3013 else if (h != NULL) 3014 tls_type = elf_s390_hash_entry(h)->tls_type; 3015 3016 if (tls_type == GOT_TLS_GD) 3017 continue; 3018 3019 if (r_type == R_390_TLS_LOAD) 3020 { 3021 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) 3022 { 3023 /* IE->LE transition. Four valid cases: 3024 lg %rx,(0,%ry) -> sllg %rx,%ry,0 3025 lg %rx,(%ry,0) -> sllg %rx,%ry,0 3026 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0 3027 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */ 3028 unsigned int insn0, insn1, ry; 3029 3030 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); 3031 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); 3032 if (insn1 != 0x0004) 3033 { 3034 invalid_tls_insn (input_bfd, input_section, rel); 3035 return FALSE; 3036 } 3037 if ((insn0 & 0xff00f000) == 0xe3000000) 3038 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */ 3039 ry = (insn0 & 0x000f0000); 3040 else if ((insn0 & 0xff0f0000) == 0xe3000000) 3041 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */ 3042 ry = (insn0 & 0x0000f000) << 4; 3043 else if ((insn0 & 0xff00f000) == 0xe300c000) 3044 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */ 3045 ry = (insn0 & 0x000f0000); 3046 else if ((insn0 & 0xff0f0000) == 0xe30c0000) 3047 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */ 3048 ry = (insn0 & 0x0000f000) << 4; 3049 else 3050 { 3051 invalid_tls_insn (input_bfd, input_section, rel); 3052 return FALSE; 3053 } 3054 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry; 3055 insn1 = 0x000d; 3056 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); 3057 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); 3058 } 3059 } 3060 else if (r_type == R_390_TLS_GDCALL) 3061 { 3062 unsigned int insn0, insn1; 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 ((insn0 & 0xffff0000) != 0xc0e50000) 3067 { 3068 invalid_tls_insn (input_bfd, input_section, rel); 3069 return FALSE; 3070 } 3071 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) 3072 { 3073 /* GD->LE transition. 3074 brasl %r14,__tls_get_addr@plt -> brcl 0,. */ 3075 insn0 = 0xc0040000; 3076 insn1 = 0x0000; 3077 } 3078 else 3079 { 3080 /* GD->IE transition. 3081 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */ 3082 insn0 = 0xe322c000; 3083 insn1 = 0x0004; 3084 } 3085 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); 3086 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); 3087 } 3088 else if (r_type == R_390_TLS_LDCALL) 3089 { 3090 if (!bfd_link_pic (info)) 3091 { 3092 unsigned int insn0, insn1; 3093 3094 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); 3095 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); 3096 if ((insn0 & 0xffff0000) != 0xc0e50000) 3097 { 3098 invalid_tls_insn (input_bfd, input_section, rel); 3099 return FALSE; 3100 } 3101 /* LD->LE transition. 3102 brasl %r14,__tls_get_addr@plt -> brcl 0,. */ 3103 insn0 = 0xc0040000; 3104 insn1 = 0x0000; 3105 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); 3106 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); 3107 } 3108 } 3109 continue; 3110 3111 default: 3112 break; 3113 } 3114 3115 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections 3116 because such sections are not SEC_ALLOC and thus ld.so will 3117 not process them. */ 3118 if (unresolved_reloc 3119 && !((input_section->flags & SEC_DEBUGGING) != 0 3120 && h->def_dynamic) 3121 && _bfd_elf_section_offset (output_bfd, info, input_section, 3122 rel->r_offset) != (bfd_vma) -1) 3123 _bfd_error_handler 3124 /* xgettext:c-format */ 3125 (_("%pB(%pA+%#" PRIx64 "): " 3126 "unresolvable %s relocation against symbol `%s'"), 3127 input_bfd, 3128 input_section, 3129 (uint64_t) rel->r_offset, 3130 howto->name, 3131 h->root.root.string); 3132 3133 do_relocation: 3134 3135 /* When applying a 24 bit reloc we need to start one byte 3136 earlier. Otherwise the 32 bit get/put bfd operations might 3137 access a byte after the actual section. */ 3138 if (r_type == R_390_PC24DBL 3139 || r_type == R_390_PLT24DBL) 3140 rel->r_offset--; 3141 3142 if (r_type == R_390_20 3143 || r_type == R_390_GOT20 3144 || r_type == R_390_GOTPLT20 3145 || r_type == R_390_TLS_GOTIE20) 3146 { 3147 relocation += rel->r_addend; 3148 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; 3149 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3150 contents, rel->r_offset, 3151 relocation, 0); 3152 } 3153 else 3154 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3155 contents, rel->r_offset, 3156 relocation, rel->r_addend); 3157 3158 if (r != bfd_reloc_ok) 3159 { 3160 const char *name; 3161 3162 if (h != NULL) 3163 name = h->root.root.string; 3164 else 3165 { 3166 name = bfd_elf_string_from_elf_section (input_bfd, 3167 symtab_hdr->sh_link, 3168 sym->st_name); 3169 if (name == NULL) 3170 return FALSE; 3171 if (*name == '\0') 3172 name = bfd_section_name (input_bfd, sec); 3173 } 3174 3175 if (r == bfd_reloc_overflow) 3176 (*info->callbacks->reloc_overflow) 3177 (info, (h ? &h->root : NULL), name, howto->name, 3178 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 3179 else 3180 { 3181 _bfd_error_handler 3182 /* xgettext:c-format */ 3183 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"), 3184 input_bfd, input_section, 3185 (uint64_t) rel->r_offset, name, (int) r); 3186 return FALSE; 3187 } 3188 } 3189 } 3190 3191 return TRUE; 3192 } 3193 3194 /* Generate the PLT slots together with the dynamic relocations needed 3195 for IFUNC symbols. */ 3196 3197 static void 3198 elf_s390_finish_ifunc_symbol (bfd *output_bfd, 3199 struct bfd_link_info *info, 3200 struct elf_link_hash_entry *h, 3201 struct elf_s390_link_hash_table *htab, 3202 bfd_vma plt_offset, 3203 bfd_vma resolver_address) 3204 { 3205 bfd_vma plt_index; 3206 bfd_vma got_offset; 3207 Elf_Internal_Rela rela; 3208 bfd_byte *loc; 3209 asection *plt, *gotplt, *relplt; 3210 3211 if (htab->elf.iplt == NULL 3212 || htab->elf.igotplt == NULL 3213 || htab->elf.irelplt == NULL) 3214 abort (); 3215 3216 /* Index of the PLT slot within iplt section. */ 3217 plt_index = plt_offset / PLT_ENTRY_SIZE; 3218 plt = htab->elf.iplt; 3219 /* Offset into the igot.plt section. */ 3220 got_offset = plt_index * GOT_ENTRY_SIZE; 3221 gotplt = htab->elf.igotplt; 3222 relplt = htab->elf.irelplt; 3223 3224 /* Fill in the blueprint of a PLT. */ 3225 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry, 3226 PLT_ENTRY_SIZE); 3227 3228 /* Fixup the relative address to the GOT entry */ 3229 bfd_put_32 (output_bfd, 3230 (gotplt->output_section->vma + 3231 gotplt->output_offset + got_offset 3232 - (plt->output_section->vma + 3233 plt->output_offset + 3234 plt_offset))/2, 3235 plt->contents + plt_offset + 2); 3236 /* Fixup the relative branch to PLT 0 */ 3237 bfd_put_32 (output_bfd, - (plt->output_offset + 3238 (PLT_ENTRY_SIZE * plt_index) + 22)/2, 3239 plt->contents + plt_offset + 24); 3240 /* Fixup offset into .rela.plt section. */ 3241 bfd_put_32 (output_bfd, relplt->output_offset + 3242 plt_index * sizeof (Elf64_External_Rela), 3243 plt->contents + plt_offset + 28); 3244 3245 /* Fill in the entry in the global offset table. 3246 Points to instruction after GOT offset. */ 3247 bfd_put_64 (output_bfd, 3248 (plt->output_section->vma 3249 + plt->output_offset 3250 + plt_offset 3251 + 14), 3252 gotplt->contents + got_offset); 3253 3254 /* Fill in the entry in the .rela.plt section. */ 3255 rela.r_offset = (gotplt->output_section->vma 3256 + gotplt->output_offset 3257 + got_offset); 3258 3259 if (!h 3260 || h->dynindx == -1 3261 || ((bfd_link_executable (info) 3262 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 3263 && h->def_regular)) 3264 { 3265 /* The symbol can be locally resolved. */ 3266 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE); 3267 rela.r_addend = resolver_address; 3268 } 3269 else 3270 { 3271 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); 3272 rela.r_addend = 0; 3273 } 3274 3275 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela); 3276 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3277 } 3278 3279 3280 /* Finish up dynamic symbol handling. We set the contents of various 3281 dynamic sections here. */ 3282 3283 static bfd_boolean 3284 elf_s390_finish_dynamic_symbol (bfd *output_bfd, 3285 struct bfd_link_info *info, 3286 struct elf_link_hash_entry *h, 3287 Elf_Internal_Sym *sym) 3288 { 3289 struct elf_s390_link_hash_table *htab; 3290 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h; 3291 3292 htab = elf_s390_hash_table (info); 3293 if (htab == NULL) 3294 return FALSE; 3295 3296 if (h->plt.offset != (bfd_vma) -1) 3297 { 3298 bfd_vma plt_index; 3299 bfd_vma got_offset; 3300 Elf_Internal_Rela rela; 3301 bfd_byte *loc; 3302 3303 /* This symbol has an entry in the procedure linkage table. Set 3304 it up. */ 3305 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 3306 { 3307 elf_s390_finish_ifunc_symbol (output_bfd, info, h, 3308 htab, h->plt.offset, 3309 eh->ifunc_resolver_address + 3310 eh->ifunc_resolver_section->output_offset + 3311 eh->ifunc_resolver_section->output_section->vma); 3312 3313 /* Do not return yet. Handling of explicit GOT slots of 3314 IFUNC symbols is below. */ 3315 } 3316 else 3317 { 3318 if (h->dynindx == -1 3319 || htab->elf.splt == NULL 3320 || htab->elf.sgotplt == NULL 3321 || htab->elf.srelplt == NULL) 3322 abort (); 3323 3324 /* Calc. index no. 3325 Current offset - size first entry / entry size. */ 3326 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; 3327 3328 /* Offset in GOT is PLT index plus GOT headers(3) times 8, 3329 addr & GOT addr. */ 3330 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; 3331 3332 /* Fill in the blueprint of a PLT. */ 3333 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry, 3334 PLT_ENTRY_SIZE); 3335 3336 /* Fixup the relative address to the GOT entry */ 3337 bfd_put_32 (output_bfd, 3338 (htab->elf.sgotplt->output_section->vma + 3339 htab->elf.sgotplt->output_offset + got_offset 3340 - (htab->elf.splt->output_section->vma + 3341 htab->elf.splt->output_offset + 3342 h->plt.offset))/2, 3343 htab->elf.splt->contents + h->plt.offset + 2); 3344 /* Fixup the relative branch to PLT 0 */ 3345 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE + 3346 (PLT_ENTRY_SIZE * plt_index) + 22)/2, 3347 htab->elf.splt->contents + h->plt.offset + 24); 3348 /* Fixup offset into .rela.plt section. */ 3349 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela), 3350 htab->elf.splt->contents + h->plt.offset + 28); 3351 3352 /* Fill in the entry in the global offset table. 3353 Points to instruction after GOT offset. */ 3354 bfd_put_64 (output_bfd, 3355 (htab->elf.splt->output_section->vma 3356 + htab->elf.splt->output_offset 3357 + h->plt.offset 3358 + 14), 3359 htab->elf.sgotplt->contents + got_offset); 3360 3361 /* Fill in the entry in the .rela.plt section. */ 3362 rela.r_offset = (htab->elf.sgotplt->output_section->vma 3363 + htab->elf.sgotplt->output_offset 3364 + got_offset); 3365 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); 3366 rela.r_addend = 0; 3367 loc = htab->elf.srelplt->contents + plt_index * 3368 sizeof (Elf64_External_Rela); 3369 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3370 3371 if (!h->def_regular) 3372 { 3373 /* Mark the symbol as undefined, rather than as defined in 3374 the .plt section. Leave the value alone. This is a clue 3375 for the dynamic linker, to make function pointer 3376 comparisons work between an application and shared 3377 library. */ 3378 sym->st_shndx = SHN_UNDEF; 3379 } 3380 } 3381 } 3382 3383 if (h->got.offset != (bfd_vma) -1 3384 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD 3385 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE 3386 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) 3387 { 3388 Elf_Internal_Rela rela; 3389 bfd_byte *loc; 3390 3391 /* This symbol has an entry in the global offset table. Set it 3392 up. */ 3393 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) 3394 abort (); 3395 3396 rela.r_offset = (htab->elf.sgot->output_section->vma 3397 + htab->elf.sgot->output_offset 3398 + (h->got.offset &~ (bfd_vma) 1)); 3399 3400 if (h->def_regular && s390_is_ifunc_symbol_p (h)) 3401 { 3402 if (bfd_link_pic (info)) 3403 { 3404 /* An explicit GOT slot usage needs GLOB_DAT. If the 3405 symbol references local the implicit got.iplt slot 3406 will be used and the IRELATIVE reloc has been created 3407 above. */ 3408 goto do_glob_dat; 3409 } 3410 else 3411 { 3412 /* For non-shared objects explicit GOT slots must be 3413 filled with the PLT slot address for pointer 3414 equality reasons. */ 3415 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma 3416 + htab->elf.iplt->output_offset 3417 + h->plt.offset), 3418 htab->elf.sgot->contents + h->got.offset); 3419 return TRUE; 3420 } 3421 } 3422 else if (bfd_link_pic (info) 3423 && SYMBOL_REFERENCES_LOCAL (info, h)) 3424 { 3425 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) 3426 return TRUE; 3427 3428 /* If this is a static link, or it is a -Bsymbolic link and 3429 the symbol is defined locally or was forced to be local 3430 because of a version file, we just want to emit a 3431 RELATIVE reloc. The entry in the global offset table 3432 will already have been initialized in the 3433 relocate_section function. */ 3434 if (!(h->def_regular || ELF_COMMON_DEF_P (h))) 3435 return FALSE; 3436 BFD_ASSERT((h->got.offset & 1) != 0); 3437 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 3438 rela.r_addend = (h->root.u.def.value 3439 + h->root.u.def.section->output_section->vma 3440 + h->root.u.def.section->output_offset); 3441 } 3442 else 3443 { 3444 BFD_ASSERT((h->got.offset & 1) == 0); 3445 do_glob_dat: 3446 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset); 3447 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT); 3448 rela.r_addend = 0; 3449 } 3450 3451 loc = htab->elf.srelgot->contents; 3452 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela); 3453 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3454 } 3455 3456 if (h->needs_copy) 3457 { 3458 Elf_Internal_Rela rela; 3459 asection *s; 3460 bfd_byte *loc; 3461 3462 /* This symbols needs a copy reloc. Set it up. */ 3463 3464 if (h->dynindx == -1 3465 || (h->root.type != bfd_link_hash_defined 3466 && h->root.type != bfd_link_hash_defweak) 3467 || htab->elf.srelbss == NULL) 3468 abort (); 3469 3470 rela.r_offset = (h->root.u.def.value 3471 + h->root.u.def.section->output_section->vma 3472 + h->root.u.def.section->output_offset); 3473 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY); 3474 rela.r_addend = 0; 3475 if (h->root.u.def.section == htab->elf.sdynrelro) 3476 s = htab->elf.sreldynrelro; 3477 else 3478 s = htab->elf.srelbss; 3479 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela); 3480 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3481 } 3482 3483 /* Mark some specially defined symbols as absolute. */ 3484 if (h == htab->elf.hdynamic 3485 || h == htab->elf.hgot 3486 || h == htab->elf.hplt) 3487 sym->st_shndx = SHN_ABS; 3488 3489 return TRUE; 3490 } 3491 3492 /* Used to decide how to sort relocs in an optimal manner for the 3493 dynamic linker, before writing them out. */ 3494 3495 static enum elf_reloc_type_class 3496 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 3497 const asection *rel_sec ATTRIBUTE_UNUSED, 3498 const Elf_Internal_Rela *rela) 3499 { 3500 bfd *abfd = info->output_bfd; 3501 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 3502 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info); 3503 unsigned long r_symndx = ELF64_R_SYM (rela->r_info); 3504 Elf_Internal_Sym sym; 3505 3506 if (htab->elf.dynsym == NULL 3507 || !bed->s->swap_symbol_in (abfd, 3508 (htab->elf.dynsym->contents 3509 + r_symndx * bed->s->sizeof_sym), 3510 0, &sym)) 3511 abort (); 3512 3513 /* Check relocation against STT_GNU_IFUNC symbol. */ 3514 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) 3515 return reloc_class_ifunc; 3516 3517 switch ((int) ELF64_R_TYPE (rela->r_info)) 3518 { 3519 case R_390_RELATIVE: 3520 return reloc_class_relative; 3521 case R_390_JMP_SLOT: 3522 return reloc_class_plt; 3523 case R_390_COPY: 3524 return reloc_class_copy; 3525 default: 3526 return reloc_class_normal; 3527 } 3528 } 3529 3530 /* Finish up the dynamic sections. */ 3531 3532 static bfd_boolean 3533 elf_s390_finish_dynamic_sections (bfd *output_bfd, 3534 struct bfd_link_info *info) 3535 { 3536 struct elf_s390_link_hash_table *htab; 3537 bfd *dynobj; 3538 asection *sdyn; 3539 bfd *ibfd; 3540 unsigned int i; 3541 3542 htab = elf_s390_hash_table (info); 3543 if (htab == NULL) 3544 return FALSE; 3545 3546 dynobj = htab->elf.dynobj; 3547 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 3548 3549 if (htab->elf.dynamic_sections_created) 3550 { 3551 Elf64_External_Dyn *dyncon, *dynconend; 3552 3553 if (sdyn == NULL || htab->elf.sgot == NULL) 3554 abort (); 3555 3556 dyncon = (Elf64_External_Dyn *) sdyn->contents; 3557 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); 3558 for (; dyncon < dynconend; dyncon++) 3559 { 3560 Elf_Internal_Dyn dyn; 3561 asection *s; 3562 3563 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); 3564 3565 switch (dyn.d_tag) 3566 { 3567 default: 3568 continue; 3569 3570 case DT_PLTGOT: 3571 s = htab->elf.sgotplt; 3572 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 3573 break; 3574 3575 case DT_JMPREL: 3576 s = htab->elf.srelplt; 3577 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 3578 break; 3579 3580 case DT_PLTRELSZ: 3581 dyn.d_un.d_val = htab->elf.srelplt->size; 3582 if (htab->elf.irelplt) 3583 dyn.d_un.d_val += htab->elf.irelplt->size; 3584 break; 3585 3586 case DT_RELASZ: 3587 /* The procedure linkage table relocs (DT_JMPREL) should 3588 not be included in the overall relocs (DT_RELA). 3589 Therefore, we override the DT_RELASZ entry here to 3590 make it not include the JMPREL relocs. Since the 3591 linker script arranges for .rela.plt to follow all 3592 other relocation sections, we don't have to worry 3593 about changing the DT_RELA entry. */ 3594 dyn.d_un.d_val -= htab->elf.srelplt->size; 3595 if (htab->elf.irelplt) 3596 dyn.d_un.d_val -= htab->elf.irelplt->size; 3597 break; 3598 } 3599 3600 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); 3601 } 3602 3603 /* Fill in the special first entry in the procedure linkage table. */ 3604 if (htab->elf.splt && htab->elf.splt->size > 0) 3605 { 3606 /* fill in blueprint for plt 0 entry */ 3607 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry, 3608 PLT_FIRST_ENTRY_SIZE); 3609 /* Fixup relative address to start of GOT */ 3610 bfd_put_32 (output_bfd, 3611 (htab->elf.sgotplt->output_section->vma 3612 + htab->elf.sgotplt->output_offset 3613 - htab->elf.splt->output_section->vma 3614 - htab->elf.splt->output_offset - 6)/2, 3615 htab->elf.splt->contents + 8); 3616 } 3617 if (elf_section_data (htab->elf.splt->output_section) != NULL) 3618 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize 3619 = PLT_ENTRY_SIZE; 3620 } 3621 3622 if (htab->elf.sgotplt) 3623 { 3624 /* Fill in the first three entries in the global offset table. */ 3625 if (htab->elf.sgotplt->size > 0) 3626 { 3627 bfd_put_64 (output_bfd, 3628 (sdyn == NULL ? (bfd_vma) 0 3629 : sdyn->output_section->vma + sdyn->output_offset), 3630 htab->elf.sgotplt->contents); 3631 /* One entry for shared object struct ptr. */ 3632 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8); 3633 /* One entry for _dl_runtime_resolve. */ 3634 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 16); 3635 } 3636 3637 elf_section_data (htab->elf.sgot->output_section) 3638 ->this_hdr.sh_entsize = 8; 3639 } 3640 3641 /* Finish dynamic symbol for local IFUNC symbols. */ 3642 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 3643 { 3644 struct plt_entry *local_plt; 3645 Elf_Internal_Sym *isym; 3646 Elf_Internal_Shdr *symtab_hdr; 3647 3648 symtab_hdr = &elf_symtab_hdr (ibfd); 3649 3650 if (!is_s390_elf (ibfd)) 3651 continue; 3652 3653 local_plt = elf_s390_local_plt (ibfd); 3654 if (local_plt != NULL) 3655 for (i = 0; i < symtab_hdr->sh_info; i++) 3656 { 3657 if (local_plt[i].plt.offset != (bfd_vma) -1) 3658 { 3659 asection *sec = local_plt[i].sec; 3660 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i); 3661 if (isym == NULL) 3662 return FALSE; 3663 3664 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 3665 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab, 3666 local_plt[i].plt.offset, 3667 isym->st_value 3668 + sec->output_section->vma 3669 + sec->output_offset); 3670 3671 } 3672 } 3673 } 3674 3675 return TRUE; 3676 } 3677 3678 /* Support for core dump NOTE sections. */ 3679 3680 static bfd_boolean 3681 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 3682 { 3683 int offset; 3684 size_t size; 3685 3686 switch (note->descsz) 3687 { 3688 default: 3689 return FALSE; 3690 3691 case 336: /* sizeof(struct elf_prstatus) on s390x */ 3692 /* pr_cursig */ 3693 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 3694 3695 /* pr_pid */ 3696 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32); 3697 3698 /* pr_reg */ 3699 offset = 112; 3700 size = 216; 3701 break; 3702 } 3703 3704 /* Make a ".reg/999" section. */ 3705 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 3706 size, note->descpos + offset); 3707 } 3708 3709 static bfd_boolean 3710 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 3711 { 3712 switch (note->descsz) 3713 { 3714 default: 3715 return FALSE; 3716 3717 case 136: /* sizeof(struct elf_prpsinfo) on s390x */ 3718 elf_tdata (abfd)->core->pid 3719 = bfd_get_32 (abfd, note->descdata + 24); 3720 elf_tdata (abfd)->core->program 3721 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); 3722 elf_tdata (abfd)->core->command 3723 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); 3724 } 3725 3726 /* Note that for some reason, a spurious space is tacked 3727 onto the end of the args in some (at least one anyway) 3728 implementations, so strip it off if it exists. */ 3729 3730 { 3731 char *command = elf_tdata (abfd)->core->command; 3732 int n = strlen (command); 3733 3734 if (0 < n && command[n - 1] == ' ') 3735 command[n - 1] = '\0'; 3736 } 3737 3738 return TRUE; 3739 } 3740 3741 static char * 3742 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz, 3743 int note_type, ...) 3744 { 3745 va_list ap; 3746 3747 switch (note_type) 3748 { 3749 default: 3750 return NULL; 3751 3752 case NT_PRPSINFO: 3753 { 3754 char data[136] ATTRIBUTE_NONSTRING = { 0 }; 3755 const char *fname, *psargs; 3756 3757 va_start (ap, note_type); 3758 fname = va_arg (ap, const char *); 3759 psargs = va_arg (ap, const char *); 3760 va_end (ap); 3761 3762 strncpy (data + 40, fname, 16); 3763 #if GCC_VERSION == 8001 3764 DIAGNOSTIC_PUSH; 3765 /* GCC 8.1 warns about 80 equals destination size with 3766 -Wstringop-truncation: 3767 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643 3768 */ 3769 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION; 3770 #endif 3771 strncpy (data + 56, psargs, 80); 3772 #if GCC_VERSION == 8001 3773 DIAGNOSTIC_POP; 3774 #endif 3775 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, 3776 &data, sizeof (data)); 3777 } 3778 3779 case NT_PRSTATUS: 3780 { 3781 char data[336] = { 0 }; 3782 long pid; 3783 int cursig; 3784 const void *gregs; 3785 3786 va_start (ap, note_type); 3787 pid = va_arg (ap, long); 3788 cursig = va_arg (ap, int); 3789 gregs = va_arg (ap, const void *); 3790 va_end (ap); 3791 3792 bfd_put_16 (abfd, cursig, data + 12); 3793 bfd_put_32 (abfd, pid, data + 32); 3794 memcpy (data + 112, gregs, 216); 3795 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, 3796 &data, sizeof (data)); 3797 } 3798 } 3799 /* NOTREACHED */ 3800 } 3801 3802 /* Return address for Ith PLT stub in section PLT, for relocation REL 3803 or (bfd_vma) -1 if it should not be included. */ 3804 3805 static bfd_vma 3806 elf_s390_plt_sym_val (bfd_vma i, const asection *plt, 3807 const arelent *rel ATTRIBUTE_UNUSED) 3808 { 3809 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; 3810 } 3811 3812 /* Merge backend specific data from an object file to the output 3813 object file when linking. */ 3814 3815 static bfd_boolean 3816 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 3817 { 3818 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd)) 3819 return TRUE; 3820 3821 return elf_s390_merge_obj_attributes (ibfd, info); 3822 } 3823 3824 /* We may add a PT_S390_PGSTE program header. */ 3825 3826 static int 3827 elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED, 3828 struct bfd_link_info *info) 3829 { 3830 struct elf_s390_link_hash_table *htab; 3831 3832 if (info) 3833 { 3834 htab = elf_s390_hash_table (info); 3835 if (htab) 3836 return htab->params->pgste; 3837 } 3838 return 0; 3839 } 3840 3841 3842 /* Add the PT_S390_PGSTE program header. */ 3843 3844 static bfd_boolean 3845 elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info) 3846 { 3847 struct elf_s390_link_hash_table *htab; 3848 struct elf_segment_map *m, *pm = NULL; 3849 3850 if (!abfd || !info) 3851 return TRUE; 3852 3853 htab = elf_s390_hash_table (info); 3854 if (!htab || !htab->params->pgste) 3855 return TRUE; 3856 3857 /* If there is already a PT_S390_PGSTE header, avoid adding 3858 another. */ 3859 m = elf_seg_map (abfd); 3860 while (m && m->p_type != PT_S390_PGSTE) 3861 { 3862 pm = m; 3863 m = m->next; 3864 } 3865 3866 if (m) 3867 return TRUE; 3868 3869 m = (struct elf_segment_map *) 3870 bfd_zalloc (abfd, sizeof (struct elf_segment_map)); 3871 if (m == NULL) 3872 return FALSE; 3873 m->p_type = PT_S390_PGSTE; 3874 m->count = 0; 3875 m->next = NULL; 3876 if (pm) 3877 pm->next = m; 3878 3879 return TRUE; 3880 } 3881 3882 bfd_boolean 3883 bfd_elf_s390_set_options (struct bfd_link_info *info, 3884 struct s390_elf_params *params) 3885 { 3886 struct elf_s390_link_hash_table *htab; 3887 3888 if (info) 3889 { 3890 htab = elf_s390_hash_table (info); 3891 if (htab) 3892 htab->params = params; 3893 } 3894 3895 return TRUE; 3896 } 3897 3898 3899 /* Why was the hash table entry size definition changed from 3900 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and 3901 this is the only reason for the s390_elf64_size_info structure. */ 3902 3903 const struct elf_size_info s390_elf64_size_info = 3904 { 3905 sizeof (Elf64_External_Ehdr), 3906 sizeof (Elf64_External_Phdr), 3907 sizeof (Elf64_External_Shdr), 3908 sizeof (Elf64_External_Rel), 3909 sizeof (Elf64_External_Rela), 3910 sizeof (Elf64_External_Sym), 3911 sizeof (Elf64_External_Dyn), 3912 sizeof (Elf_External_Note), 3913 8, /* hash-table entry size. */ 3914 1, /* internal relocations per external relocations. */ 3915 64, /* arch_size. */ 3916 3, /* log_file_align. */ 3917 ELFCLASS64, EV_CURRENT, 3918 bfd_elf64_write_out_phdrs, 3919 bfd_elf64_write_shdrs_and_ehdr, 3920 bfd_elf64_checksum_contents, 3921 bfd_elf64_write_relocs, 3922 bfd_elf64_swap_symbol_in, 3923 bfd_elf64_swap_symbol_out, 3924 bfd_elf64_slurp_reloc_table, 3925 bfd_elf64_slurp_symbol_table, 3926 bfd_elf64_swap_dyn_in, 3927 bfd_elf64_swap_dyn_out, 3928 bfd_elf64_swap_reloc_in, 3929 bfd_elf64_swap_reloc_out, 3930 bfd_elf64_swap_reloca_in, 3931 bfd_elf64_swap_reloca_out 3932 }; 3933 3934 #define TARGET_BIG_SYM s390_elf64_vec 3935 #define TARGET_BIG_NAME "elf64-s390" 3936 #define ELF_ARCH bfd_arch_s390 3937 #define ELF_TARGET_ID S390_ELF_DATA 3938 #define ELF_MACHINE_CODE EM_S390 3939 #define ELF_MACHINE_ALT1 EM_S390_OLD 3940 #define ELF_MAXPAGESIZE 0x1000 3941 3942 #define elf_backend_size_info s390_elf64_size_info 3943 3944 #define elf_backend_can_gc_sections 1 3945 #define elf_backend_can_refcount 1 3946 #define elf_backend_want_got_plt 1 3947 #define elf_backend_plt_readonly 1 3948 #define elf_backend_want_plt_sym 0 3949 #define elf_backend_got_header_size 24 3950 #define elf_backend_want_dynrelro 1 3951 #define elf_backend_rela_normal 1 3952 3953 #define elf_info_to_howto elf_s390_info_to_howto 3954 3955 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name 3956 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create 3957 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup 3958 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup 3959 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data 3960 3961 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol 3962 #define elf_backend_check_relocs elf_s390_check_relocs 3963 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol 3964 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections 3965 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections 3966 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol 3967 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook 3968 #define elf_backend_reloc_type_class elf_s390_reloc_type_class 3969 #define elf_backend_relocate_section elf_s390_relocate_section 3970 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections 3971 #define elf_backend_init_index_section _bfd_elf_init_1_index_section 3972 #define elf_backend_grok_prstatus elf_s390_grok_prstatus 3973 #define elf_backend_grok_psinfo elf_s390_grok_psinfo 3974 #define elf_backend_write_core_note elf_s390_write_core_note 3975 #define elf_backend_plt_sym_val elf_s390_plt_sym_val 3976 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p 3977 #define elf_backend_additional_program_headers elf_s390_additional_program_headers 3978 #define elf_backend_modify_segment_map elf_s390_modify_segment_map 3979 3980 #define bfd_elf64_mkobject elf_s390_mkobject 3981 #define elf_backend_object_p elf_s390_object_p 3982 3983 #include "elf64-target.h" 3984