1160814Ssimon/* IBM S/390-specific support for 64-bit ELF 2160814Ssimon Copyright (C) 2000-2020 Free Software Foundation, Inc. 3160814Ssimon Contributed Martin Schwidefsky (schwidefsky@de.ibm.com). 4160814Ssimon 5160814Ssimon This file is part of BFD, the Binary File Descriptor library. 6160814Ssimon 7160814Ssimon This program is free software; you can redistribute it and/or modify 8160814Ssimon it under the terms of the GNU General Public License as published by 9160814Ssimon the Free Software Foundation; either version 3 of the License, or 10280304Sjkim (at your option) any later version. 11280304Sjkim 12160814Ssimon This program is distributed in the hope that it will be useful, 13160814Ssimon but WITHOUT ANY WARRANTY; without even the implied warranty of 14160814Ssimon MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15160814Ssimon GNU General Public License for more details. 16160814Ssimon 17160814Ssimon You should have received a copy of the GNU General Public License 18160814Ssimon along with this program; if not, write to the Free Software 19160814Ssimon Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 20160814Ssimon 02110-1301, USA. */ 21160814Ssimon 22160814Ssimon#include "sysdep.h" 23160814Ssimon#include "bfd.h" 24160814Ssimon#include "bfdlink.h" 25160814Ssimon#include "libbfd.h" 26160814Ssimon#include "elf-bfd.h" 27160814Ssimon#include "elf/s390.h" 28160814Ssimon#include "elf-s390.h" 29160814Ssimon#include <stdarg.h> 30160814Ssimon 31160814Ssimon/* In case we're on a 32-bit machine, construct a 64-bit "-1" value 32160814Ssimon from smaller values. Start with zero, widen, *then* decrement. */ 33160814Ssimon#define MINUS_ONE (((bfd_vma)0) - 1) 34160814Ssimon 35160814Ssimonstatic bfd_reloc_status_type 36160814Ssimons390_tls_reloc (bfd *, arelent *, asymbol *, void *, 37160814Ssimon asection *, bfd *, char **); 38160814Ssimonstatic bfd_reloc_status_type 39160814Ssimons390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *, 40160814Ssimon asection *, bfd *, char **); 41160814Ssimon 42280304Sjkim/* The relocation "howto" table. */ 43280304Sjkimstatic reloc_howto_type elf_howto_table[] = 44280304Sjkim{ 45160814Ssimon HOWTO (R_390_NONE, /* type */ 46160814Ssimon 0, /* rightshift */ 47280304Sjkim 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */ 48160814Ssimon 0, /* bitsize */ 49160814Ssimon FALSE, /* pc_relative */ 50160814Ssimon 0, /* bitpos */ 51160814Ssimon complain_overflow_dont, /* complain_on_overflow */ 52160814Ssimon bfd_elf_generic_reloc, /* special_function */ 53160814Ssimon "R_390_NONE", /* name */ 54160814Ssimon FALSE, /* partial_inplace */ 55160814Ssimon 0, /* src_mask */ 56160814Ssimon 0, /* dst_mask */ 57160814Ssimon FALSE), /* pcrel_offset */ 58160814Ssimon 59280304Sjkim HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 60280304Sjkim bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), 61280304Sjkim HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 62280304Sjkim bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), 63280304Sjkim HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 64280304Sjkim bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), 65280304Sjkim HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 66280304Sjkim bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), 67280304Sjkim HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 68280304Sjkim bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), 69160814Ssimon HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield, 70280304Sjkim bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), 71280304Sjkim HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 72280304Sjkim bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), 73280304Sjkim HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, 74280304Sjkim bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), 75160814Ssimon HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 76280304Sjkim bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE), 77280304Sjkim HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 78280304Sjkim bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE), 79280304Sjkim HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 80280304Sjkim bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE), 81160814Ssimon HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, 82280304Sjkim bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE), 83280304Sjkim HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 84280304Sjkim bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE), 85280304Sjkim HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, 86280304Sjkim bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE), 87280304Sjkim HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 88280304Sjkim bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), 89280304Sjkim HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, 90160814Ssimon bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), 91280304Sjkim HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, 92280304Sjkim bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), 93280304Sjkim HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, 94280304Sjkim bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), 95280304Sjkim HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 96280304Sjkim bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), 97280304Sjkim HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 98280304Sjkim bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), 99280304Sjkim HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 100160814Ssimon bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE), 101280304Sjkim HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 102280304Sjkim bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE), 103280304Sjkim HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, 104280304Sjkim bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE), 105280304Sjkim HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 106280304Sjkim bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE), 107280304Sjkim HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, 108280304Sjkim bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE), 109280304Sjkim HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 110160814Ssimon bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE), 111160814Ssimon HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 112280304Sjkim bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), 113280304Sjkim HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 114280304Sjkim bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE), 115280304Sjkim HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, 116280304Sjkim bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), 117280304Sjkim HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 118280304Sjkim bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), 119280304Sjkim HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 120160814Ssimon bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), 121160814Ssimon HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 122280304Sjkim bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE), 123160814Ssimon HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, 124160814Ssimon 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. */ 186static 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); 188static 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 191static reloc_howto_type * 192elf_s390_reloc_type_lookup (bfd *abfd, 193 bfd_reloc_code_real_type code) 194{ 195 switch (code) 196 { 197 case BFD_RELOC_NONE: 198 return &elf_howto_table[(int) R_390_NONE]; 199 case BFD_RELOC_8: 200 return &elf_howto_table[(int) R_390_8]; 201 case BFD_RELOC_390_12: 202 return &elf_howto_table[(int) R_390_12]; 203 case BFD_RELOC_16: 204 return &elf_howto_table[(int) R_390_16]; 205 case BFD_RELOC_32: 206 return &elf_howto_table[(int) R_390_32]; 207 case BFD_RELOC_CTOR: 208 return &elf_howto_table[(int) R_390_32]; 209 case BFD_RELOC_32_PCREL: 210 return &elf_howto_table[(int) R_390_PC32]; 211 case BFD_RELOC_390_GOT12: 212 return &elf_howto_table[(int) R_390_GOT12]; 213 case BFD_RELOC_32_GOT_PCREL: 214 return &elf_howto_table[(int) R_390_GOT32]; 215 case BFD_RELOC_390_PLT32: 216 return &elf_howto_table[(int) R_390_PLT32]; 217 case BFD_RELOC_390_COPY: 218 return &elf_howto_table[(int) R_390_COPY]; 219 case BFD_RELOC_390_GLOB_DAT: 220 return &elf_howto_table[(int) R_390_GLOB_DAT]; 221 case BFD_RELOC_390_JMP_SLOT: 222 return &elf_howto_table[(int) R_390_JMP_SLOT]; 223 case BFD_RELOC_390_RELATIVE: 224 return &elf_howto_table[(int) R_390_RELATIVE]; 225 case BFD_RELOC_32_GOTOFF: 226 return &elf_howto_table[(int) R_390_GOTOFF32]; 227 case BFD_RELOC_390_GOTPC: 228 return &elf_howto_table[(int) R_390_GOTPC]; 229 case BFD_RELOC_390_GOT16: 230 return &elf_howto_table[(int) R_390_GOT16]; 231 case BFD_RELOC_16_PCREL: 232 return &elf_howto_table[(int) R_390_PC16]; 233 case BFD_RELOC_390_PC12DBL: 234 return &elf_howto_table[(int) R_390_PC12DBL]; 235 case BFD_RELOC_390_PLT12DBL: 236 return &elf_howto_table[(int) R_390_PLT12DBL]; 237 case BFD_RELOC_390_PC16DBL: 238 return &elf_howto_table[(int) R_390_PC16DBL]; 239 case BFD_RELOC_390_PLT16DBL: 240 return &elf_howto_table[(int) R_390_PLT16DBL]; 241 case BFD_RELOC_390_PC24DBL: 242 return &elf_howto_table[(int) R_390_PC24DBL]; 243 case BFD_RELOC_390_PLT24DBL: 244 return &elf_howto_table[(int) R_390_PLT24DBL]; 245 case BFD_RELOC_390_PC32DBL: 246 return &elf_howto_table[(int) R_390_PC32DBL]; 247 case BFD_RELOC_390_PLT32DBL: 248 return &elf_howto_table[(int) R_390_PLT32DBL]; 249 case BFD_RELOC_390_GOTPCDBL: 250 return &elf_howto_table[(int) R_390_GOTPCDBL]; 251 case BFD_RELOC_64: 252 return &elf_howto_table[(int) R_390_64]; 253 case BFD_RELOC_64_PCREL: 254 return &elf_howto_table[(int) R_390_PC64]; 255 case BFD_RELOC_390_GOT64: 256 return &elf_howto_table[(int) R_390_GOT64]; 257 case BFD_RELOC_390_PLT64: 258 return &elf_howto_table[(int) R_390_PLT64]; 259 case BFD_RELOC_390_GOTENT: 260 return &elf_howto_table[(int) R_390_GOTENT]; 261 case BFD_RELOC_16_GOTOFF: 262 return &elf_howto_table[(int) R_390_GOTOFF16]; 263 case BFD_RELOC_390_GOTOFF64: 264 return &elf_howto_table[(int) R_390_GOTOFF64]; 265 case BFD_RELOC_390_GOTPLT12: 266 return &elf_howto_table[(int) R_390_GOTPLT12]; 267 case BFD_RELOC_390_GOTPLT16: 268 return &elf_howto_table[(int) R_390_GOTPLT16]; 269 case BFD_RELOC_390_GOTPLT32: 270 return &elf_howto_table[(int) R_390_GOTPLT32]; 271 case BFD_RELOC_390_GOTPLT64: 272 return &elf_howto_table[(int) R_390_GOTPLT64]; 273 case BFD_RELOC_390_GOTPLTENT: 274 return &elf_howto_table[(int) R_390_GOTPLTENT]; 275 case BFD_RELOC_390_PLTOFF16: 276 return &elf_howto_table[(int) R_390_PLTOFF16]; 277 case BFD_RELOC_390_PLTOFF32: 278 return &elf_howto_table[(int) R_390_PLTOFF32]; 279 case BFD_RELOC_390_PLTOFF64: 280 return &elf_howto_table[(int) R_390_PLTOFF64]; 281 case BFD_RELOC_390_TLS_LOAD: 282 return &elf_howto_table[(int) R_390_TLS_LOAD]; 283 case BFD_RELOC_390_TLS_GDCALL: 284 return &elf_howto_table[(int) R_390_TLS_GDCALL]; 285 case BFD_RELOC_390_TLS_LDCALL: 286 return &elf_howto_table[(int) R_390_TLS_LDCALL]; 287 case BFD_RELOC_390_TLS_GD64: 288 return &elf_howto_table[(int) R_390_TLS_GD64]; 289 case BFD_RELOC_390_TLS_GOTIE12: 290 return &elf_howto_table[(int) R_390_TLS_GOTIE12]; 291 case BFD_RELOC_390_TLS_GOTIE64: 292 return &elf_howto_table[(int) R_390_TLS_GOTIE64]; 293 case BFD_RELOC_390_TLS_LDM64: 294 return &elf_howto_table[(int) R_390_TLS_LDM64]; 295 case BFD_RELOC_390_TLS_IE64: 296 return &elf_howto_table[(int) R_390_TLS_IE64]; 297 case BFD_RELOC_390_TLS_IEENT: 298 return &elf_howto_table[(int) R_390_TLS_IEENT]; 299 case BFD_RELOC_390_TLS_LE64: 300 return &elf_howto_table[(int) R_390_TLS_LE64]; 301 case BFD_RELOC_390_TLS_LDO64: 302 return &elf_howto_table[(int) R_390_TLS_LDO64]; 303 case BFD_RELOC_390_TLS_DTPMOD: 304 return &elf_howto_table[(int) R_390_TLS_DTPMOD]; 305 case BFD_RELOC_390_TLS_DTPOFF: 306 return &elf_howto_table[(int) R_390_TLS_DTPOFF]; 307 case BFD_RELOC_390_TLS_TPOFF: 308 return &elf_howto_table[(int) R_390_TLS_TPOFF]; 309 case BFD_RELOC_390_20: 310 return &elf_howto_table[(int) R_390_20]; 311 case BFD_RELOC_390_GOT20: 312 return &elf_howto_table[(int) R_390_GOT20]; 313 case BFD_RELOC_390_GOTPLT20: 314 return &elf_howto_table[(int) R_390_GOTPLT20]; 315 case BFD_RELOC_390_TLS_GOTIE20: 316 return &elf_howto_table[(int) R_390_TLS_GOTIE20]; 317 case BFD_RELOC_390_IRELATIVE: 318 return &elf_howto_table[(int) R_390_IRELATIVE]; 319 case BFD_RELOC_VTABLE_INHERIT: 320 return &elf64_s390_vtinherit_howto; 321 case BFD_RELOC_VTABLE_ENTRY: 322 return &elf64_s390_vtentry_howto; 323 default: 324 break; 325 } 326 327 /* xgettext:c-format */ 328 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code); 329 bfd_set_error (bfd_error_bad_value); 330 return NULL; 331} 332 333static reloc_howto_type * 334elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 335 const char *r_name) 336{ 337 unsigned int i; 338 339 for (i = 0; 340 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); 341 i++) 342 if (elf_howto_table[i].name != NULL 343 && strcasecmp (elf_howto_table[i].name, r_name) == 0) 344 return &elf_howto_table[i]; 345 346 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0) 347 return &elf64_s390_vtinherit_howto; 348 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0) 349 return &elf64_s390_vtentry_howto; 350 351 return NULL; 352} 353 354/* We need to use ELF64_R_TYPE so we have our own copy of this function, 355 and elf64-s390.c has its own copy. */ 356 357static bfd_boolean 358elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 359 arelent *cache_ptr, 360 Elf_Internal_Rela *dst) 361{ 362 unsigned int r_type = ELF64_R_TYPE(dst->r_info); 363 364 switch (r_type) 365 { 366 case R_390_GNU_VTINHERIT: 367 cache_ptr->howto = &elf64_s390_vtinherit_howto; 368 break; 369 370 case R_390_GNU_VTENTRY: 371 cache_ptr->howto = &elf64_s390_vtentry_howto; 372 break; 373 374 default: 375 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0])) 376 { 377 /* xgettext:c-format */ 378 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 379 abfd, r_type); 380 bfd_set_error (bfd_error_bad_value); 381 return FALSE; 382 } 383 cache_ptr->howto = &elf_howto_table[r_type]; 384 } 385 return TRUE; 386} 387 388/* A relocation function which doesn't do anything. */ 389static bfd_reloc_status_type 390s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED, 391 arelent *reloc_entry, 392 asymbol *symbol ATTRIBUTE_UNUSED, 393 void * data ATTRIBUTE_UNUSED, 394 asection *input_section, 395 bfd *output_bfd, 396 char **error_message ATTRIBUTE_UNUSED) 397{ 398 if (output_bfd) 399 reloc_entry->address += input_section->output_offset; 400 return bfd_reloc_ok; 401} 402 403/* Handle the large displacement relocs. */ 404static bfd_reloc_status_type 405s390_elf_ldisp_reloc (bfd *abfd, 406 arelent *reloc_entry, 407 asymbol *symbol, 408 void * data, 409 asection *input_section, 410 bfd *output_bfd, 411 char **error_message ATTRIBUTE_UNUSED) 412{ 413 reloc_howto_type *howto = reloc_entry->howto; 414 bfd_vma relocation; 415 bfd_vma insn; 416 417 if (output_bfd != (bfd *) NULL 418 && (symbol->flags & BSF_SECTION_SYM) == 0 419 && (! howto->partial_inplace 420 || reloc_entry->addend == 0)) 421 { 422 reloc_entry->address += input_section->output_offset; 423 return bfd_reloc_ok; 424 } 425 if (output_bfd != NULL) 426 return bfd_reloc_continue; 427 428 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 429 return bfd_reloc_outofrange; 430 431 relocation = (symbol->value 432 + symbol->section->output_section->vma 433 + symbol->section->output_offset); 434 relocation += reloc_entry->addend; 435 if (howto->pc_relative) 436 { 437 relocation -= (input_section->output_section->vma 438 + input_section->output_offset); 439 relocation -= reloc_entry->address; 440 } 441 442 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); 443 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; 444 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); 445 446 if ((bfd_signed_vma) relocation < - 0x80000 447 || (bfd_signed_vma) relocation > 0x7ffff) 448 return bfd_reloc_overflow; 449 else 450 return bfd_reloc_ok; 451} 452 453static bfd_boolean 454elf_s390_is_local_label_name (bfd *abfd, const char *name) 455{ 456 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) 457 return TRUE; 458 459 return _bfd_elf_is_local_label_name (abfd, name); 460} 461 462/* Functions for the 390 ELF linker. */ 463 464/* The name of the dynamic interpreter. This is put in the .interp 465 section. */ 466 467#define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1" 468 469/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 470 copying dynamic variables from a shared lib into an app's dynbss 471 section, and instead use a dynamic relocation to point into the 472 shared lib. */ 473#define ELIMINATE_COPY_RELOCS 1 474 475/* The size in bytes of the first entry in the procedure linkage table. */ 476#define PLT_FIRST_ENTRY_SIZE 32 477/* The size in bytes of an entry in the procedure linkage table. */ 478#define PLT_ENTRY_SIZE 32 479 480#define GOT_ENTRY_SIZE 8 481 482#define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela) 483 484/* The first three entries in a global offset table are reserved, 485 and the initial contents are unimportant (we zero them out). 486 Subsequent entries look like this. See the SVR4 ABI 386 487 supplement to see how this works. */ 488 489/* For the s390, simple addr offset can only be 0 - 4096. 490 To use the full 16777216 TB address space, several instructions 491 are needed to load an address in a register and execute 492 a branch( or just saving the address) 493 494 Furthermore, only r 0 and 1 are free to use!!! */ 495 496/* The first 3 words in the GOT are then reserved. 497 Word 0 is the address of the dynamic table. 498 Word 1 is a pointer to a structure describing the object 499 Word 2 is used to point to the loader entry address. 500 501 The code for PLT entries looks like this: 502 503 The GOT holds the address in the PLT to be executed. 504 The loader then gets: 505 48(15) = Pointer to the structure describing the object. 506 56(15) = Offset in symbol table 507 The loader must then find the module where the function is 508 and insert the address in the GOT. 509 510 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1 511 LG 1,0(1) # 6 bytes Load address from GOT in r1 512 BCR 15,1 # 2 bytes Jump to address 513 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time 514 LGF 1,12(1) # 6 bytes Load rela.plt offset into r1 515 BRCL 15,-x # 6 bytes Jump to first PLT entry 516 .long ? # 4 bytes offset into .rela.plt 517 518 Total = 32 bytes per PLT entry 519 Fixup at offset 2: relative address to GOT entry 520 Fixup at offset 22: relative branch to PLT0 521 Fixup at offset 28: 32 bit offset into .rela.plt 522 523 A 32 bit offset into the symbol table is enough. It allows for 524 .rela.plt sections up to a size of 2 gigabyte. A single dynamic 525 object (the main program, any shared library) is limited to 4GB in 526 size. Having a .rela.plt of 2GB would already make the .plt 527 section bigger than 8GB. */ 528 529static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] = 530 { 531 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */ 532 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */ 533 0x07, 0xf1, /* br %r1 */ 534 0x0d, 0x10, /* basr %r1,%r0 */ 535 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */ 536 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */ 537 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */ 538 }; 539 540/* The first PLT entry pushes the offset into the symbol table 541 from R1 onto the stack at 56(15) and the loader object info 542 at 48(15), loads the loader address in R1 and jumps to it. */ 543 544/* The first entry in the PLT: 545 546 PLT0: 547 STG 1,56(15) # r1 contains the offset into the symbol table 548 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table 549 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack 550 LG 1,16(1) # get entry address of loader 551 BCR 15,1 # jump to loader 552 553 Fixup at offset 8: relative address to start of GOT. */ 554 555static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] = 556 { 557 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */ 558 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */ 559 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */ 560 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */ 561 0x07, 0xf1, /* br %r1 */ 562 0x07, 0x00, /* nopr %r0 */ 563 0x07, 0x00, /* nopr %r0 */ 564 0x07, 0x00 /* nopr %r0 */ 565 }; 566 567 568/* s390 ELF linker hash entry. */ 569 570struct elf_s390_link_hash_entry 571{ 572 struct elf_link_hash_entry elf; 573 574 /* Number of GOTPLT references for a function. */ 575 bfd_signed_vma gotplt_refcount; 576 577#define GOT_UNKNOWN 0 578#define GOT_NORMAL 1 579#define GOT_TLS_GD 2 580#define GOT_TLS_IE 3 581#define GOT_TLS_IE_NLT 3 582 unsigned char tls_type; 583 584 /* For pointer equality reasons we might need to change the symbol 585 type from STT_GNU_IFUNC to STT_FUNC together with its value and 586 section entry. So after alloc_dynrelocs only these values should 587 be used. In order to check whether a symbol is IFUNC use 588 s390_is_ifunc_symbol_p. */ 589 bfd_vma ifunc_resolver_address; 590 asection *ifunc_resolver_section; 591}; 592 593#define elf_s390_hash_entry(ent) \ 594 ((struct elf_s390_link_hash_entry *)(ent)) 595 596/* This structure represents an entry in the local PLT list needed for 597 local IFUNC symbols. */ 598struct plt_entry 599{ 600 /* The section of the local symbol. 601 Set in relocate_section and used in finish_dynamic_sections. */ 602 asection *sec; 603 604 union 605 { 606 bfd_signed_vma refcount; 607 bfd_vma offset; 608 } plt; 609}; 610 611/* NOTE: Keep this structure in sync with 612 the one declared in elf32-s390.c. */ 613struct elf_s390_obj_tdata 614{ 615 struct elf_obj_tdata root; 616 617 /* A local PLT is needed for ifunc symbols. */ 618 struct plt_entry *local_plt; 619 620 /* TLS type for each local got entry. */ 621 char *local_got_tls_type; 622}; 623 624#define elf_s390_tdata(abfd) \ 625 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) 626 627#define elf_s390_local_plt(abfd) \ 628 (elf_s390_tdata (abfd)->local_plt) 629 630#define elf_s390_local_got_tls_type(abfd) \ 631 (elf_s390_tdata (abfd)->local_got_tls_type) 632 633#define is_s390_elf(bfd) \ 634 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 635 && elf_tdata (bfd) != NULL \ 636 && elf_object_id (bfd) == S390_ELF_DATA) 637 638static bfd_boolean 639elf_s390_mkobject (bfd *abfd) 640{ 641 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata), 642 S390_ELF_DATA); 643} 644 645static bfd_boolean 646elf_s390_object_p (bfd *abfd) 647{ 648 /* Set the right machine number for an s390 elf32 file. */ 649 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64); 650} 651 652/* s390 ELF linker hash table. */ 653 654struct elf_s390_link_hash_table 655{ 656 struct elf_link_hash_table elf; 657 658 /* Short-cuts to get to dynamic linker sections. */ 659 asection *irelifunc; 660 661 union { 662 bfd_signed_vma refcount; 663 bfd_vma offset; 664 } tls_ldm_got; 665 666 /* Options passed from the linker. */ 667 struct s390_elf_params *params; 668}; 669 670/* Get the s390 ELF linker hash table from a link_info structure. */ 671 672#define elf_s390_hash_table(p) \ 673 ((is_elf_hash_table ((p)->hash) \ 674 && elf_hash_table_id (elf_hash_table (p)) == S390_ELF_DATA) \ 675 ? (struct elf_s390_link_hash_table *) (p)->hash : NULL) 676 677#define ELF64 1 678#include "elf-s390-common.c" 679 680/* Create an entry in an s390 ELF linker hash table. */ 681 682static struct bfd_hash_entry * 683link_hash_newfunc (struct bfd_hash_entry *entry, 684 struct bfd_hash_table *table, 685 const char *string) 686{ 687 /* Allocate the structure if it has not already been allocated by a 688 subclass. */ 689 if (entry == NULL) 690 { 691 entry = bfd_hash_allocate (table, 692 sizeof (struct elf_s390_link_hash_entry)); 693 if (entry == NULL) 694 return entry; 695 } 696 697 /* Call the allocation method of the superclass. */ 698 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 699 if (entry != NULL) 700 { 701 struct elf_s390_link_hash_entry *eh; 702 703 eh = (struct elf_s390_link_hash_entry *) entry; 704 eh->gotplt_refcount = 0; 705 eh->tls_type = GOT_UNKNOWN; 706 eh->ifunc_resolver_address = 0; 707 eh->ifunc_resolver_section = NULL; 708 } 709 710 return entry; 711} 712 713/* Create an s390 ELF linker hash table. */ 714 715static struct bfd_link_hash_table * 716elf_s390_link_hash_table_create (bfd *abfd) 717{ 718 struct elf_s390_link_hash_table *ret; 719 size_t amt = sizeof (struct elf_s390_link_hash_table); 720 721 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt); 722 if (ret == NULL) 723 return NULL; 724 725 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, 726 sizeof (struct elf_s390_link_hash_entry), 727 S390_ELF_DATA)) 728 { 729 free (ret); 730 return NULL; 731 } 732 733 return &ret->elf.root; 734} 735 736/* Copy the extra info we tack onto an elf_link_hash_entry. */ 737 738static void 739elf_s390_copy_indirect_symbol (struct bfd_link_info *info, 740 struct elf_link_hash_entry *dir, 741 struct elf_link_hash_entry *ind) 742{ 743 struct elf_s390_link_hash_entry *edir, *eind; 744 745 edir = (struct elf_s390_link_hash_entry *) dir; 746 eind = (struct elf_s390_link_hash_entry *) ind; 747 748 if (ind->root.type == bfd_link_hash_indirect 749 && dir->got.refcount <= 0) 750 { 751 edir->tls_type = eind->tls_type; 752 eind->tls_type = GOT_UNKNOWN; 753 } 754 755 if (ELIMINATE_COPY_RELOCS 756 && ind->root.type != bfd_link_hash_indirect 757 && dir->dynamic_adjusted) 758 { 759 /* If called to transfer flags for a weakdef during processing 760 of elf_adjust_dynamic_symbol, don't copy non_got_ref. 761 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 762 if (dir->versioned != versioned_hidden) 763 dir->ref_dynamic |= ind->ref_dynamic; 764 dir->ref_regular |= ind->ref_regular; 765 dir->ref_regular_nonweak |= ind->ref_regular_nonweak; 766 dir->needs_plt |= ind->needs_plt; 767 } 768 else 769 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 770} 771 772static int 773elf_s390_tls_transition (struct bfd_link_info *info, 774 int r_type, 775 int is_local) 776{ 777 if (bfd_link_pic (info)) 778 return r_type; 779 780 switch (r_type) 781 { 782 case R_390_TLS_GD64: 783 case R_390_TLS_IE64: 784 if (is_local) 785 return R_390_TLS_LE64; 786 return R_390_TLS_IE64; 787 case R_390_TLS_GOTIE64: 788 if (is_local) 789 return R_390_TLS_LE64; 790 return R_390_TLS_GOTIE64; 791 case R_390_TLS_LDM64: 792 return R_390_TLS_LE64; 793 } 794 795 return r_type; 796} 797 798/* Look through the relocs for a section during the first phase, and 799 allocate space in the global offset table or procedure linkage 800 table. */ 801 802static bfd_boolean 803elf_s390_check_relocs (bfd *abfd, 804 struct bfd_link_info *info, 805 asection *sec, 806 const Elf_Internal_Rela *relocs) 807{ 808 struct elf_s390_link_hash_table *htab; 809 Elf_Internal_Shdr *symtab_hdr; 810 struct elf_link_hash_entry **sym_hashes; 811 const Elf_Internal_Rela *rel; 812 const Elf_Internal_Rela *rel_end; 813 asection *sreloc; 814 bfd_signed_vma *local_got_refcounts; 815 int tls_type, old_tls_type; 816 817 if (bfd_link_relocatable (info)) 818 return TRUE; 819 820 BFD_ASSERT (is_s390_elf (abfd)); 821 822 htab = elf_s390_hash_table (info); 823 if (htab == NULL) 824 return FALSE; 825 826 symtab_hdr = &elf_symtab_hdr (abfd); 827 sym_hashes = elf_sym_hashes (abfd); 828 local_got_refcounts = elf_local_got_refcounts (abfd); 829 830 sreloc = NULL; 831 832 rel_end = relocs + sec->reloc_count; 833 for (rel = relocs; rel < rel_end; rel++) 834 { 835 unsigned int r_type; 836 unsigned int r_symndx; 837 struct elf_link_hash_entry *h; 838 Elf_Internal_Sym *isym; 839 840 r_symndx = ELF64_R_SYM (rel->r_info); 841 842 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) 843 { 844 /* xgettext:c-format */ 845 _bfd_error_handler (_("%pB: bad symbol index: %d"), 846 abfd, r_symndx); 847 return FALSE; 848 } 849 850 if (r_symndx < symtab_hdr->sh_info) 851 { 852 /* A local symbol. */ 853 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, 854 abfd, r_symndx); 855 if (isym == NULL) 856 return FALSE; 857 858 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 859 { 860 struct plt_entry *plt; 861 862 if (htab->elf.dynobj == NULL) 863 htab->elf.dynobj = abfd; 864 865 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) 866 return FALSE; 867 868 if (local_got_refcounts == NULL) 869 { 870 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr)) 871 return FALSE; 872 local_got_refcounts = elf_local_got_refcounts (abfd); 873 } 874 plt = elf_s390_local_plt (abfd); 875 plt[r_symndx].plt.refcount++; 876 } 877 h = NULL; 878 } 879 else 880 { 881 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 882 while (h->root.type == bfd_link_hash_indirect 883 || h->root.type == bfd_link_hash_warning) 884 h = (struct elf_link_hash_entry *) h->root.u.i.link; 885 } 886 887 /* Create got section and local_got_refcounts array if they 888 are needed. */ 889 r_type = elf_s390_tls_transition (info, 890 ELF64_R_TYPE (rel->r_info), 891 h == NULL); 892 switch (r_type) 893 { 894 case R_390_GOT12: 895 case R_390_GOT16: 896 case R_390_GOT20: 897 case R_390_GOT32: 898 case R_390_GOT64: 899 case R_390_GOTENT: 900 case R_390_GOTPLT12: 901 case R_390_GOTPLT16: 902 case R_390_GOTPLT20: 903 case R_390_GOTPLT32: 904 case R_390_GOTPLT64: 905 case R_390_GOTPLTENT: 906 case R_390_TLS_GD64: 907 case R_390_TLS_GOTIE12: 908 case R_390_TLS_GOTIE20: 909 case R_390_TLS_GOTIE64: 910 case R_390_TLS_IEENT: 911 case R_390_TLS_IE64: 912 case R_390_TLS_LDM64: 913 if (h == NULL 914 && local_got_refcounts == NULL) 915 { 916 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr)) 917 return FALSE; 918 local_got_refcounts = elf_local_got_refcounts (abfd); 919 } 920 921 /* Fall through. */ 922 case R_390_GOTOFF16: 923 case R_390_GOTOFF32: 924 case R_390_GOTOFF64: 925 case R_390_GOTPC: 926 case R_390_GOTPCDBL: 927 if (htab->elf.sgot == NULL) 928 { 929 if (htab->elf.dynobj == NULL) 930 htab->elf.dynobj = abfd; 931 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) 932 return FALSE; 933 } 934 } 935 936 if (h != NULL) 937 { 938 if (htab->elf.dynobj == NULL) 939 htab->elf.dynobj = abfd; 940 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) 941 return FALSE; 942 943 /* Make sure an IFUNC symbol defined in a non-shared object 944 always gets a PLT slot. */ 945 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 946 { 947 /* The symbol is called by the dynamic loader in order 948 to resolve the relocation. So it is in fact also 949 referenced. */ 950 h->ref_regular = 1; 951 h->needs_plt = 1; 952 } 953 } 954 955 switch (r_type) 956 { 957 case R_390_GOTPC: 958 case R_390_GOTPCDBL: 959 /* These relocs do not need a GOT slot. They just load the 960 GOT pointer itself or address something else relative to 961 the GOT. Since the GOT pointer has been set up above we 962 are done. */ 963 break; 964 case R_390_GOTOFF16: 965 case R_390_GOTOFF32: 966 case R_390_GOTOFF64: 967 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular) 968 break; 969 /* Fall through. */ 970 971 case R_390_PLT12DBL: 972 case R_390_PLT16DBL: 973 case R_390_PLT24DBL: 974 case R_390_PLT32: 975 case R_390_PLT32DBL: 976 case R_390_PLT64: 977 case R_390_PLTOFF16: 978 case R_390_PLTOFF32: 979 case R_390_PLTOFF64: 980 /* This symbol requires a procedure linkage table entry. We 981 actually build the entry in adjust_dynamic_symbol, 982 because this might be a case of linking PIC code which is 983 never referenced by a dynamic object, in which case we 984 don't need to generate a procedure linkage table entry 985 after all. */ 986 987 /* If this is a local symbol, we resolve it directly without 988 creating a procedure linkage table entry. */ 989 if (h != NULL) 990 { 991 h->needs_plt = 1; 992 h->plt.refcount += 1; 993 } 994 break; 995 996 case R_390_GOTPLT12: 997 case R_390_GOTPLT16: 998 case R_390_GOTPLT20: 999 case R_390_GOTPLT32: 1000 case R_390_GOTPLT64: 1001 case R_390_GOTPLTENT: 1002 /* This symbol requires either a procedure linkage table entry 1003 or an entry in the local got. We actually build the entry 1004 in adjust_dynamic_symbol because whether this is really a 1005 global reference can change and with it the fact if we have 1006 to create a plt entry or a local got entry. To be able to 1007 make a once global symbol a local one we have to keep track 1008 of the number of gotplt references that exist for this 1009 symbol. */ 1010 if (h != NULL) 1011 { 1012 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; 1013 h->needs_plt = 1; 1014 h->plt.refcount += 1; 1015 } 1016 else 1017 local_got_refcounts[r_symndx] += 1; 1018 break; 1019 1020 case R_390_TLS_LDM64: 1021 htab->tls_ldm_got.refcount += 1; 1022 break; 1023 1024 case R_390_TLS_IE64: 1025 case R_390_TLS_GOTIE12: 1026 case R_390_TLS_GOTIE20: 1027 case R_390_TLS_GOTIE64: 1028 case R_390_TLS_IEENT: 1029 if (bfd_link_pic (info)) 1030 info->flags |= DF_STATIC_TLS; 1031 /* Fall through */ 1032 1033 case R_390_GOT12: 1034 case R_390_GOT16: 1035 case R_390_GOT20: 1036 case R_390_GOT32: 1037 case R_390_GOT64: 1038 case R_390_GOTENT: 1039 case R_390_TLS_GD64: 1040 /* This symbol requires a global offset table entry. */ 1041 switch (r_type) 1042 { 1043 default: 1044 case R_390_GOT12: 1045 case R_390_GOT16: 1046 case R_390_GOT20: 1047 case R_390_GOT32: 1048 case R_390_GOTENT: 1049 tls_type = GOT_NORMAL; 1050 break; 1051 case R_390_TLS_GD64: 1052 tls_type = GOT_TLS_GD; 1053 break; 1054 case R_390_TLS_IE64: 1055 case R_390_TLS_GOTIE64: 1056 tls_type = GOT_TLS_IE; 1057 break; 1058 case R_390_TLS_GOTIE12: 1059 case R_390_TLS_GOTIE20: 1060 case R_390_TLS_IEENT: 1061 tls_type = GOT_TLS_IE_NLT; 1062 break; 1063 } 1064 1065 if (h != NULL) 1066 { 1067 h->got.refcount += 1; 1068 old_tls_type = elf_s390_hash_entry(h)->tls_type; 1069 } 1070 else 1071 { 1072 local_got_refcounts[r_symndx] += 1; 1073 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; 1074 } 1075 /* If a TLS symbol is accessed using IE at least once, 1076 there is no point to use dynamic model for it. */ 1077 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) 1078 { 1079 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) 1080 { 1081 _bfd_error_handler 1082 /* xgettext:c-format */ 1083 (_("%pB: `%s' accessed both as normal and thread local symbol"), 1084 abfd, h->root.root.string); 1085 return FALSE; 1086 } 1087 if (old_tls_type > tls_type) 1088 tls_type = old_tls_type; 1089 } 1090 1091 if (old_tls_type != tls_type) 1092 { 1093 if (h != NULL) 1094 elf_s390_hash_entry (h)->tls_type = tls_type; 1095 else 1096 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; 1097 } 1098 1099 if (r_type != R_390_TLS_IE64) 1100 break; 1101 /* Fall through */ 1102 1103 case R_390_TLS_LE64: 1104 /* For static linking and executables this reloc will be 1105 calculated at linktime otherwise a TLS_TPOFF runtime 1106 reloc will be generated. */ 1107 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info)) 1108 break; 1109 1110 if (!bfd_link_pic (info)) 1111 break; 1112 info->flags |= DF_STATIC_TLS; 1113 /* Fall through */ 1114 1115 case R_390_8: 1116 case R_390_16: 1117 case R_390_32: 1118 case R_390_64: 1119 case R_390_PC12DBL: 1120 case R_390_PC16: 1121 case R_390_PC16DBL: 1122 case R_390_PC24DBL: 1123 case R_390_PC32: 1124 case R_390_PC32DBL: 1125 case R_390_PC64: 1126 if (h != NULL && bfd_link_executable (info)) 1127 { 1128 /* If this reloc is in a read-only section, we might 1129 need a copy reloc. We can't check reliably at this 1130 stage whether the section is read-only, as input 1131 sections have not yet been mapped to output sections. 1132 Tentatively set the flag for now, and correct in 1133 adjust_dynamic_symbol. */ 1134 h->non_got_ref = 1; 1135 1136 if (!bfd_link_pic (info)) 1137 { 1138 /* We may need a .plt entry if the function this reloc 1139 refers to is in a shared lib. */ 1140 h->plt.refcount += 1; 1141 } 1142 } 1143 1144 /* If we are creating a shared library, and this is a reloc 1145 against a global symbol, or a non PC relative reloc 1146 against a local symbol, then we need to copy the reloc 1147 into the shared library. However, if we are linking with 1148 -Bsymbolic, we do not need to copy a reloc against a 1149 global symbol which is defined in an object we are 1150 including in the link (i.e., DEF_REGULAR is set). At 1151 this point we have not seen all the input files, so it is 1152 possible that DEF_REGULAR is not set now but will be set 1153 later (it is never cleared). In case of a weak definition, 1154 DEF_REGULAR may be cleared later by a strong definition in 1155 a shared library. We account for that possibility below by 1156 storing information in the relocs_copied field of the hash 1157 table entry. A similar situation occurs when creating 1158 shared libraries and symbol visibility changes render the 1159 symbol local. 1160 1161 If on the other hand, we are creating an executable, we 1162 may need to keep relocations for symbols satisfied by a 1163 dynamic library if we manage to avoid copy relocs for the 1164 symbol. */ 1165 if ((bfd_link_pic (info) 1166 && (sec->flags & SEC_ALLOC) != 0 1167 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16 1168 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL 1169 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL 1170 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL 1171 && ELF64_R_TYPE (rel->r_info) != R_390_PC32 1172 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL 1173 && ELF64_R_TYPE (rel->r_info) != R_390_PC64) 1174 || (h != NULL 1175 && (! SYMBOLIC_BIND (info, h) 1176 || h->root.type == bfd_link_hash_defweak 1177 || !h->def_regular)))) 1178 || (ELIMINATE_COPY_RELOCS 1179 && !bfd_link_pic (info) 1180 && (sec->flags & SEC_ALLOC) != 0 1181 && h != NULL 1182 && (h->root.type == bfd_link_hash_defweak 1183 || !h->def_regular))) 1184 { 1185 struct elf_dyn_relocs *p; 1186 struct elf_dyn_relocs **head; 1187 1188 /* We must copy these reloc types into the output file. 1189 Create a reloc section in dynobj and make room for 1190 this reloc. */ 1191 if (sreloc == NULL) 1192 { 1193 if (htab->elf.dynobj == NULL) 1194 htab->elf.dynobj = abfd; 1195 1196 sreloc = _bfd_elf_make_dynamic_reloc_section 1197 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE); 1198 1199 if (sreloc == NULL) 1200 return FALSE; 1201 } 1202 1203 /* If this is a global symbol, we count the number of 1204 relocations we need for this symbol. */ 1205 if (h != NULL) 1206 { 1207 head = &h->dyn_relocs; 1208 } 1209 else 1210 { 1211 /* Track dynamic relocs needed for local syms too. 1212 We really need local syms available to do this 1213 easily. Oh well. */ 1214 asection *s; 1215 void *vpp; 1216 1217 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, 1218 abfd, r_symndx); 1219 if (isym == NULL) 1220 return FALSE; 1221 1222 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 1223 if (s == NULL) 1224 s = sec; 1225 1226 vpp = &elf_section_data (s)->local_dynrel; 1227 head = (struct elf_dyn_relocs **) vpp; 1228 } 1229 1230 p = *head; 1231 if (p == NULL || p->sec != sec) 1232 { 1233 size_t amt = sizeof *p; 1234 p = ((struct elf_dyn_relocs *) 1235 bfd_alloc (htab->elf.dynobj, amt)); 1236 if (p == NULL) 1237 return FALSE; 1238 p->next = *head; 1239 *head = p; 1240 p->sec = sec; 1241 p->count = 0; 1242 p->pc_count = 0; 1243 } 1244 1245 p->count += 1; 1246 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16 1247 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL 1248 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL 1249 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL 1250 || ELF64_R_TYPE (rel->r_info) == R_390_PC32 1251 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL 1252 || ELF64_R_TYPE (rel->r_info) == R_390_PC64) 1253 p->pc_count += 1; 1254 } 1255 break; 1256 1257 /* This relocation describes the C++ object vtable hierarchy. 1258 Reconstruct it for later use during GC. */ 1259 case R_390_GNU_VTINHERIT: 1260 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1261 return FALSE; 1262 break; 1263 1264 /* This relocation describes which C++ vtable entries are actually 1265 used. Record for later use during GC. */ 1266 case R_390_GNU_VTENTRY: 1267 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1268 return FALSE; 1269 break; 1270 1271 default: 1272 break; 1273 } 1274 } 1275 1276 return TRUE; 1277} 1278 1279/* Return the section that should be marked against GC for a given 1280 relocation. */ 1281 1282static asection * 1283elf_s390_gc_mark_hook (asection *sec, 1284 struct bfd_link_info *info, 1285 Elf_Internal_Rela *rel, 1286 struct elf_link_hash_entry *h, 1287 Elf_Internal_Sym *sym) 1288{ 1289 if (h != NULL) 1290 switch (ELF64_R_TYPE (rel->r_info)) 1291 { 1292 case R_390_GNU_VTINHERIT: 1293 case R_390_GNU_VTENTRY: 1294 return NULL; 1295 } 1296 1297 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1298} 1299 1300/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT 1301 entry but we found we will not create any. Called when we find we will 1302 not have any PLT for this symbol, by for example 1303 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, 1304 or elf_s390_size_dynamic_sections if no dynamic sections will be 1305 created (we're only linking static objects). */ 1306 1307static void 1308elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h) 1309{ 1310 if (h->elf.root.type == bfd_link_hash_warning) 1311 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; 1312 1313 if (h->gotplt_refcount <= 0) 1314 return; 1315 1316 /* We simply add the number of gotplt references to the number 1317 * of got references for this symbol. */ 1318 h->elf.got.refcount += h->gotplt_refcount; 1319 h->gotplt_refcount = -1; 1320} 1321 1322/* Adjust a symbol defined by a dynamic object and referenced by a 1323 regular object. The current definition is in some section of the 1324 dynamic object, but we're not including those sections. We have to 1325 change the definition to something the rest of the link can 1326 understand. */ 1327 1328static bfd_boolean 1329elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info, 1330 struct elf_link_hash_entry *h) 1331{ 1332 struct elf_s390_link_hash_table *htab; 1333 asection *s, *srel; 1334 1335 /* STT_GNU_IFUNC symbol must go through PLT. */ 1336 if (s390_is_ifunc_symbol_p (h)) 1337 { 1338 /* All local STT_GNU_IFUNC references must be treated as local 1339 calls via local PLT. */ 1340 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h)) 1341 { 1342 bfd_size_type pc_count = 0, count = 0; 1343 struct elf_dyn_relocs **pp; 1344 struct elf_dyn_relocs *p; 1345 1346 for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) 1347 { 1348 pc_count += p->pc_count; 1349 p->count -= p->pc_count; 1350 p->pc_count = 0; 1351 count += p->count; 1352 if (p->count == 0) 1353 *pp = p->next; 1354 else 1355 pp = &p->next; 1356 } 1357 1358 if (pc_count || count) 1359 { 1360 h->needs_plt = 1; 1361 h->non_got_ref = 1; 1362 if (h->plt.refcount <= 0) 1363 h->plt.refcount = 1; 1364 else 1365 h->plt.refcount += 1; 1366 } 1367 } 1368 1369 if (h->plt.refcount <= 0) 1370 { 1371 h->plt.offset = (bfd_vma) -1; 1372 h->needs_plt = 0; 1373 } 1374 return TRUE; 1375 } 1376 1377 /* If this is a function, put it in the procedure linkage table. We 1378 will fill in the contents of the procedure linkage table later 1379 (although we could actually do it here). */ 1380 if (h->type == STT_FUNC 1381 || h->needs_plt) 1382 { 1383 if (h->plt.refcount <= 0 1384 || SYMBOL_CALLS_LOCAL (info, h) 1385 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) 1386 { 1387 /* This case can occur if we saw a PLT32 reloc in an input 1388 file, but the symbol was never referred to by a dynamic 1389 object, or if all references were garbage collected. In 1390 such a case, we don't actually need to build a procedure 1391 linkage table, and we can just do a PC32 reloc instead. */ 1392 h->plt.offset = (bfd_vma) -1; 1393 h->needs_plt = 0; 1394 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1395 } 1396 1397 return TRUE; 1398 } 1399 else 1400 /* It's possible that we incorrectly decided a .plt reloc was 1401 needed for an R_390_PC32 reloc to a non-function sym in 1402 check_relocs. We can't decide accurately between function and 1403 non-function syms in check-relocs; Objects loaded later in 1404 the link may change h->type. So fix it now. */ 1405 h->plt.offset = (bfd_vma) -1; 1406 1407 /* If this is a weak symbol, and there is a real definition, the 1408 processor independent code will have arranged for us to see the 1409 real definition first, and we can just use the same value. */ 1410 if (h->is_weakalias) 1411 { 1412 struct elf_link_hash_entry *def = weakdef (h); 1413 BFD_ASSERT (def->root.type == bfd_link_hash_defined); 1414 h->root.u.def.section = def->root.u.def.section; 1415 h->root.u.def.value = def->root.u.def.value; 1416 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) 1417 h->non_got_ref = def->non_got_ref; 1418 return TRUE; 1419 } 1420 1421 /* This is a reference to a symbol defined by a dynamic object which 1422 is not a function. */ 1423 1424 /* If we are creating a shared library, we must presume that the 1425 only references to the symbol are via the global offset table. 1426 For such cases we need not do anything here; the relocations will 1427 be handled correctly by relocate_section. */ 1428 if (bfd_link_pic (info)) 1429 return TRUE; 1430 1431 /* If there are no references to this symbol that do not use the 1432 GOT, we don't need to generate a copy reloc. */ 1433 if (!h->non_got_ref) 1434 return TRUE; 1435 1436 /* If -z nocopyreloc was given, we won't generate them either. */ 1437 if (info->nocopyreloc) 1438 { 1439 h->non_got_ref = 0; 1440 return TRUE; 1441 } 1442 1443 /* If we don't find any dynamic relocs in read-only sections, then 1444 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 1445 if (ELIMINATE_COPY_RELOCS && !_bfd_elf_readonly_dynrelocs (h)) 1446 { 1447 h->non_got_ref = 0; 1448 return TRUE; 1449 } 1450 1451 /* We must allocate the symbol in our .dynbss section, which will 1452 become part of the .bss section of the executable. There will be 1453 an entry for this symbol in the .dynsym section. The dynamic 1454 object will contain position independent code, so all references 1455 from the dynamic object to this symbol will go through the global 1456 offset table. The dynamic linker will use the .dynsym entry to 1457 determine the address it must put in the global offset table, so 1458 both the dynamic object and the regular object will refer to the 1459 same memory location for the variable. */ 1460 1461 htab = elf_s390_hash_table (info); 1462 if (htab == NULL) 1463 return FALSE; 1464 1465 /* We must generate a R_390_COPY reloc to tell the dynamic linker to 1466 copy the initial value out of the dynamic object and into the 1467 runtime process image. */ 1468 if ((h->root.u.def.section->flags & SEC_READONLY) != 0) 1469 { 1470 s = htab->elf.sdynrelro; 1471 srel = htab->elf.sreldynrelro; 1472 } 1473 else 1474 { 1475 s = htab->elf.sdynbss; 1476 srel = htab->elf.srelbss; 1477 } 1478 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 1479 { 1480 srel->size += sizeof (Elf64_External_Rela); 1481 h->needs_copy = 1; 1482 } 1483 1484 return _bfd_elf_adjust_dynamic_copy (info, h, s); 1485} 1486 1487/* Allocate space in .plt, .got and associated reloc sections for 1488 dynamic relocs. */ 1489 1490static bfd_boolean 1491allocate_dynrelocs (struct elf_link_hash_entry *h, 1492 void * inf) 1493{ 1494 struct bfd_link_info *info; 1495 struct elf_s390_link_hash_table *htab; 1496 struct elf_dyn_relocs *p; 1497 1498 if (h->root.type == bfd_link_hash_indirect) 1499 return TRUE; 1500 1501 info = (struct bfd_link_info *) inf; 1502 htab = elf_s390_hash_table (info); 1503 if (htab == NULL) 1504 return FALSE; 1505 1506 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it 1507 here if it is defined and referenced in a non-shared object. */ 1508 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 1509 return s390_elf_allocate_ifunc_dyn_relocs (info, h); 1510 else if (htab->elf.dynamic_sections_created 1511 && h->plt.refcount > 0) 1512 { 1513 /* Make sure this symbol is output as a dynamic symbol. 1514 Undefined weak syms won't yet be marked as dynamic. */ 1515 if (h->dynindx == -1 1516 && !h->forced_local) 1517 { 1518 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1519 return FALSE; 1520 } 1521 1522 if (bfd_link_pic (info) 1523 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) 1524 { 1525 asection *s = htab->elf.splt; 1526 1527 /* If this is the first .plt entry, make room for the special 1528 first entry. */ 1529 if (s->size == 0) 1530 s->size += PLT_FIRST_ENTRY_SIZE; 1531 1532 h->plt.offset = s->size; 1533 1534 /* If this symbol is not defined in a regular file, and we are 1535 not generating a shared library, then set the symbol to this 1536 location in the .plt. This is required to make function 1537 pointers compare as equal between the normal executable and 1538 the shared library. */ 1539 if (! bfd_link_pic (info) 1540 && !h->def_regular) 1541 { 1542 h->root.u.def.section = s; 1543 h->root.u.def.value = h->plt.offset; 1544 } 1545 1546 /* Make room for this entry. */ 1547 s->size += PLT_ENTRY_SIZE; 1548 1549 /* We also need to make an entry in the .got.plt section. */ 1550 htab->elf.sgotplt->size += GOT_ENTRY_SIZE; 1551 1552 /* We also need to make an entry in the .rela.plt section. */ 1553 htab->elf.srelplt->size += sizeof (Elf64_External_Rela); 1554 } 1555 else 1556 { 1557 h->plt.offset = (bfd_vma) -1; 1558 h->needs_plt = 0; 1559 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1560 } 1561 } 1562 else 1563 { 1564 h->plt.offset = (bfd_vma) -1; 1565 h->needs_plt = 0; 1566 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); 1567 } 1568 1569 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to 1570 the binary, we can optimize a bit. IE64 and GOTIE64 get converted 1571 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT 1572 we can save the dynamic TLS relocation. */ 1573 if (h->got.refcount > 0 1574 && !bfd_link_pic (info) 1575 && h->dynindx == -1 1576 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) 1577 { 1578 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) 1579 /* For the GOTIE access without a literal pool entry the offset has 1580 to be stored somewhere. The immediate value in the instruction 1581 is not bit enough so the value is stored in the got. */ 1582 { 1583 h->got.offset = htab->elf.sgot->size; 1584 htab->elf.sgot->size += GOT_ENTRY_SIZE; 1585 } 1586 else 1587 h->got.offset = (bfd_vma) -1; 1588 } 1589 else if (h->got.refcount > 0) 1590 { 1591 asection *s; 1592 bfd_boolean dyn; 1593 int tls_type = elf_s390_hash_entry(h)->tls_type; 1594 1595 /* Make sure this symbol is output as a dynamic symbol. 1596 Undefined weak syms won't yet be marked as dynamic. */ 1597 if (h->dynindx == -1 1598 && !h->forced_local) 1599 { 1600 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1601 return FALSE; 1602 } 1603 1604 s = htab->elf.sgot; 1605 h->got.offset = s->size; 1606 s->size += GOT_ENTRY_SIZE; 1607 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */ 1608 if (tls_type == GOT_TLS_GD) 1609 s->size += GOT_ENTRY_SIZE; 1610 dyn = htab->elf.dynamic_sections_created; 1611 /* R_390_TLS_IE64 needs one dynamic relocation, 1612 R_390_TLS_GD64 needs one if local symbol and two if global. */ 1613 if ((tls_type == GOT_TLS_GD && h->dynindx == -1) 1614 || tls_type >= GOT_TLS_IE) 1615 htab->elf.srelgot->size += sizeof (Elf64_External_Rela); 1616 else if (tls_type == GOT_TLS_GD) 1617 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela); 1618 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h) 1619 && (bfd_link_pic (info) 1620 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) 1621 htab->elf.srelgot->size += sizeof (Elf64_External_Rela); 1622 } 1623 else 1624 h->got.offset = (bfd_vma) -1; 1625 1626 if (h->dyn_relocs == NULL) 1627 return TRUE; 1628 1629 /* In the shared -Bsymbolic case, discard space allocated for 1630 dynamic pc-relative relocs against symbols which turn out to be 1631 defined in regular objects. For the normal shared case, discard 1632 space for pc-relative relocs that have become local due to symbol 1633 visibility changes. */ 1634 1635 if (bfd_link_pic (info)) 1636 { 1637 if (SYMBOL_CALLS_LOCAL (info, h)) 1638 { 1639 struct elf_dyn_relocs **pp; 1640 1641 for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) 1642 { 1643 p->count -= p->pc_count; 1644 p->pc_count = 0; 1645 if (p->count == 0) 1646 *pp = p->next; 1647 else 1648 pp = &p->next; 1649 } 1650 } 1651 1652 /* Also discard relocs on undefined weak syms with non-default 1653 visibility. */ 1654 if (h->dyn_relocs != NULL 1655 && h->root.type == bfd_link_hash_undefweak) 1656 { 1657 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 1658 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) 1659 h->dyn_relocs = NULL; 1660 1661 /* Make sure undefined weak symbols are output as a dynamic 1662 symbol in PIEs. */ 1663 else if (h->dynindx == -1 1664 && !h->forced_local) 1665 { 1666 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1667 return FALSE; 1668 } 1669 } 1670 } 1671 else if (ELIMINATE_COPY_RELOCS) 1672 { 1673 /* For the non-shared case, discard space for relocs against 1674 symbols which turn out to need copy relocs or are not 1675 dynamic. */ 1676 1677 if (!h->non_got_ref 1678 && ((h->def_dynamic 1679 && !h->def_regular) 1680 || (htab->elf.dynamic_sections_created 1681 && (h->root.type == bfd_link_hash_undefweak 1682 || h->root.type == bfd_link_hash_undefined)))) 1683 { 1684 /* Make sure this symbol is output as a dynamic symbol. 1685 Undefined weak syms won't yet be marked as dynamic. */ 1686 if (h->dynindx == -1 1687 && !h->forced_local) 1688 { 1689 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1690 return FALSE; 1691 } 1692 1693 /* If that succeeded, we know we'll be keeping all the 1694 relocs. */ 1695 if (h->dynindx != -1) 1696 goto keep; 1697 } 1698 1699 h->dyn_relocs = NULL; 1700 1701 keep: ; 1702 } 1703 1704 /* Finally, allocate space. */ 1705 for (p = h->dyn_relocs; p != NULL; p = p->next) 1706 { 1707 asection *sreloc = elf_section_data (p->sec)->sreloc; 1708 sreloc->size += p->count * sizeof (Elf64_External_Rela); 1709 } 1710 1711 return TRUE; 1712} 1713 1714/* Set the sizes of the dynamic sections. */ 1715 1716static bfd_boolean 1717elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 1718 struct bfd_link_info *info) 1719{ 1720 struct elf_s390_link_hash_table *htab; 1721 bfd *dynobj; 1722 asection *s; 1723 bfd_boolean relocs; 1724 bfd *ibfd; 1725 1726 htab = elf_s390_hash_table (info); 1727 if (htab == NULL) 1728 return FALSE; 1729 1730 dynobj = htab->elf.dynobj; 1731 if (dynobj == NULL) 1732 abort (); 1733 1734 if (htab->elf.dynamic_sections_created) 1735 { 1736 /* Set the contents of the .interp section to the interpreter. */ 1737 if (bfd_link_executable (info) && !info->nointerp) 1738 { 1739 s = bfd_get_linker_section (dynobj, ".interp"); 1740 if (s == NULL) 1741 abort (); 1742 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 1743 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 1744 } 1745 } 1746 1747 if (htab->elf.sgot && s390_gotplt_after_got_p (info)) 1748 { 1749 /* _bfd_elf_create_got_section adds the got header size always 1750 to .got.plt but we need it in .got if this section comes 1751 first. */ 1752 htab->elf.sgot->size += 3 * GOT_ENTRY_SIZE; 1753 htab->elf.sgotplt->size -= 3 * GOT_ENTRY_SIZE; 1754 1755 /* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got 1756 instead of .got.plt. */ 1757 htab->elf.hgot->root.u.def.section = htab->elf.sgot; 1758 htab->elf.hgot->root.u.def.value = 0; 1759 } 1760 1761 /* Set up .got offsets for local syms, and space for local dynamic 1762 relocs. */ 1763 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 1764 { 1765 bfd_signed_vma *local_got; 1766 bfd_signed_vma *end_local_got; 1767 char *local_tls_type; 1768 bfd_size_type locsymcount; 1769 Elf_Internal_Shdr *symtab_hdr; 1770 asection *srela; 1771 struct plt_entry *local_plt; 1772 unsigned int i; 1773 1774 if (! is_s390_elf (ibfd)) 1775 continue; 1776 1777 for (s = ibfd->sections; s != NULL; s = s->next) 1778 { 1779 struct elf_dyn_relocs *p; 1780 1781 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) 1782 { 1783 if (!bfd_is_abs_section (p->sec) 1784 && bfd_is_abs_section (p->sec->output_section)) 1785 { 1786 /* Input section has been discarded, either because 1787 it is a copy of a linkonce section or due to 1788 linker script /DISCARD/, so we'll be discarding 1789 the relocs too. */ 1790 } 1791 else if (p->count != 0) 1792 { 1793 srela = elf_section_data (p->sec)->sreloc; 1794 srela->size += p->count * sizeof (Elf64_External_Rela); 1795 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 1796 info->flags |= DF_TEXTREL; 1797 } 1798 } 1799 } 1800 1801 local_got = elf_local_got_refcounts (ibfd); 1802 if (!local_got) 1803 continue; 1804 1805 symtab_hdr = &elf_symtab_hdr (ibfd); 1806 locsymcount = symtab_hdr->sh_info; 1807 end_local_got = local_got + locsymcount; 1808 local_tls_type = elf_s390_local_got_tls_type (ibfd); 1809 s = htab->elf.sgot; 1810 srela = htab->elf.srelgot; 1811 for (; local_got < end_local_got; ++local_got, ++local_tls_type) 1812 { 1813 if (*local_got > 0) 1814 { 1815 *local_got = s->size; 1816 s->size += GOT_ENTRY_SIZE; 1817 if (*local_tls_type == GOT_TLS_GD) 1818 s->size += GOT_ENTRY_SIZE; 1819 if (bfd_link_pic (info)) 1820 srela->size += sizeof (Elf64_External_Rela); 1821 } 1822 else 1823 *local_got = (bfd_vma) -1; 1824 } 1825 1826 local_plt = elf_s390_local_plt (ibfd); 1827 for (i = 0; i < symtab_hdr->sh_info; i++) 1828 { 1829 if (local_plt[i].plt.refcount > 0) 1830 { 1831 local_plt[i].plt.offset = htab->elf.iplt->size; 1832 htab->elf.iplt->size += PLT_ENTRY_SIZE; 1833 htab->elf.igotplt->size += GOT_ENTRY_SIZE; 1834 htab->elf.irelplt->size += sizeof (Elf64_External_Rela); 1835 } 1836 else 1837 local_plt[i].plt.offset = (bfd_vma) -1; 1838 } 1839 } 1840 1841 if (htab->tls_ldm_got.refcount > 0) 1842 { 1843 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64 1844 relocs. */ 1845 htab->tls_ldm_got.offset = htab->elf.sgot->size; 1846 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; 1847 htab->elf.srelgot->size += sizeof (Elf64_External_Rela); 1848 } 1849 else 1850 htab->tls_ldm_got.offset = -1; 1851 1852 /* Allocate global sym .plt and .got entries, and space for global 1853 sym dynamic relocs. */ 1854 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); 1855 1856 /* We now have determined the sizes of the various dynamic sections. 1857 Allocate memory for them. */ 1858 relocs = FALSE; 1859 for (s = dynobj->sections; s != NULL; s = s->next) 1860 { 1861 if ((s->flags & SEC_LINKER_CREATED) == 0) 1862 continue; 1863 1864 if (s == htab->elf.splt 1865 || s == htab->elf.sgot 1866 || s == htab->elf.sgotplt 1867 || s == htab->elf.sdynbss 1868 || s == htab->elf.sdynrelro 1869 || s == htab->elf.iplt 1870 || s == htab->elf.igotplt 1871 || s == htab->irelifunc) 1872 { 1873 /* Strip this section if we don't need it; see the 1874 comment below. */ 1875 } 1876 else if (CONST_STRNEQ (bfd_section_name (s), ".rela")) 1877 { 1878 if (s->size != 0 && s != htab->elf.srelplt) 1879 relocs = TRUE; 1880 1881 /* We use the reloc_count field as a counter if we need 1882 to copy relocs into the output file. */ 1883 s->reloc_count = 0; 1884 } 1885 else 1886 { 1887 /* It's not one of our sections, so don't allocate space. */ 1888 continue; 1889 } 1890 1891 if (s->size == 0) 1892 { 1893 /* If we don't need this section, strip it from the 1894 output file. This is to handle .rela.bss and 1895 .rela.plt. We must create it in 1896 create_dynamic_sections, because it must be created 1897 before the linker maps input sections to output 1898 sections. The linker does that before 1899 adjust_dynamic_symbol is called, and it is that 1900 function which decides whether anything needs to go 1901 into these sections. */ 1902 1903 s->flags |= SEC_EXCLUDE; 1904 continue; 1905 } 1906 1907 if ((s->flags & SEC_HAS_CONTENTS) == 0) 1908 continue; 1909 1910 /* Allocate memory for the section contents. We use bfd_zalloc 1911 here in case unused entries are not reclaimed before the 1912 section's contents are written out. This should not happen, 1913 but this way if it does, we get a R_390_NONE reloc instead 1914 of garbage. */ 1915 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 1916 if (s->contents == NULL) 1917 return FALSE; 1918 } 1919 1920 return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs); 1921} 1922 1923/* Return the base VMA address which should be subtracted from real addresses 1924 when resolving @dtpoff relocation. 1925 This is PT_TLS segment p_vaddr. */ 1926 1927static bfd_vma 1928dtpoff_base (struct bfd_link_info *info) 1929{ 1930 /* If tls_sec is NULL, we should have signalled an error already. */ 1931 if (elf_hash_table (info)->tls_sec == NULL) 1932 return 0; 1933 return elf_hash_table (info)->tls_sec->vma; 1934} 1935 1936/* Return the relocation value for @tpoff relocation 1937 if STT_TLS virtual address is ADDRESS. */ 1938 1939static bfd_vma 1940tpoff (struct bfd_link_info *info, bfd_vma address) 1941{ 1942 struct elf_link_hash_table *htab = elf_hash_table (info); 1943 1944 /* If tls_sec is NULL, we should have signalled an error already. */ 1945 if (htab->tls_sec == NULL) 1946 return 0; 1947 return htab->tls_size + htab->tls_sec->vma - address; 1948} 1949 1950/* Complain if TLS instruction relocation is against an invalid 1951 instruction. */ 1952 1953static void 1954invalid_tls_insn (bfd *input_bfd, 1955 asection *input_section, 1956 Elf_Internal_Rela *rel) 1957{ 1958 reloc_howto_type *howto; 1959 1960 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info); 1961 _bfd_error_handler 1962 /* xgettext:c-format */ 1963 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"), 1964 input_bfd, 1965 input_section, 1966 (uint64_t) rel->r_offset, 1967 howto->name); 1968 bfd_set_error (bfd_error_bad_value); 1969} 1970 1971/* Relocate a 390 ELF section. */ 1972 1973static bfd_boolean 1974elf_s390_relocate_section (bfd *output_bfd, 1975 struct bfd_link_info *info, 1976 bfd *input_bfd, 1977 asection *input_section, 1978 bfd_byte *contents, 1979 Elf_Internal_Rela *relocs, 1980 Elf_Internal_Sym *local_syms, 1981 asection **local_sections) 1982{ 1983 struct elf_s390_link_hash_table *htab; 1984 Elf_Internal_Shdr *symtab_hdr; 1985 struct elf_link_hash_entry **sym_hashes; 1986 bfd_vma *local_got_offsets; 1987 Elf_Internal_Rela *rel; 1988 Elf_Internal_Rela *relend; 1989 1990 if (!is_s390_elf (input_bfd)) 1991 { 1992 bfd_set_error (bfd_error_wrong_format); 1993 return FALSE; 1994 } 1995 1996 htab = elf_s390_hash_table (info); 1997 if (htab == NULL) 1998 return FALSE; 1999 2000 symtab_hdr = &elf_symtab_hdr (input_bfd); 2001 sym_hashes = elf_sym_hashes (input_bfd); 2002 local_got_offsets = elf_local_got_offsets (input_bfd); 2003 2004 rel = relocs; 2005 relend = relocs + input_section->reloc_count; 2006 for (; rel < relend; rel++) 2007 { 2008 unsigned int r_type; 2009 reloc_howto_type *howto; 2010 unsigned long r_symndx; 2011 struct elf_link_hash_entry *h; 2012 Elf_Internal_Sym *sym; 2013 asection *sec; 2014 bfd_vma off; 2015 bfd_vma relocation; 2016 bfd_boolean unresolved_reloc; 2017 bfd_reloc_status_type r; 2018 int tls_type; 2019 bfd_boolean resolved_to_zero; 2020 2021 r_type = ELF64_R_TYPE (rel->r_info); 2022 if (r_type == (int) R_390_GNU_VTINHERIT 2023 || r_type == (int) R_390_GNU_VTENTRY) 2024 continue; 2025 if (r_type >= (int) R_390_max) 2026 { 2027 bfd_set_error (bfd_error_bad_value); 2028 return FALSE; 2029 } 2030 2031 howto = elf_howto_table + r_type; 2032 r_symndx = ELF64_R_SYM (rel->r_info); 2033 2034 h = NULL; 2035 sym = NULL; 2036 sec = NULL; 2037 unresolved_reloc = FALSE; 2038 if (r_symndx < symtab_hdr->sh_info) 2039 { 2040 sym = local_syms + r_symndx; 2041 sec = local_sections[r_symndx]; 2042 2043 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 2044 { 2045 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd); 2046 if (local_plt == NULL) 2047 return FALSE; 2048 2049 /* Address of the PLT slot. */ 2050 relocation = (htab->elf.iplt->output_section->vma 2051 + htab->elf.iplt->output_offset 2052 + local_plt[r_symndx].plt.offset); 2053 2054 switch (r_type) 2055 { 2056 case R_390_PLTOFF16: 2057 case R_390_PLTOFF32: 2058 case R_390_PLTOFF64: 2059 relocation -= s390_got_pointer (info); 2060 break; 2061 case R_390_GOTPLT12: 2062 case R_390_GOTPLT16: 2063 case R_390_GOTPLT20: 2064 case R_390_GOTPLT32: 2065 case R_390_GOTPLT64: 2066 case R_390_GOTPLTENT: 2067 case R_390_GOT12: 2068 case R_390_GOT16: 2069 case R_390_GOT20: 2070 case R_390_GOT32: 2071 case R_390_GOT64: 2072 case R_390_GOTENT: 2073 { 2074 /* Write the PLT slot address into the GOT slot. */ 2075 bfd_put_64 (output_bfd, relocation, 2076 htab->elf.sgot->contents + 2077 local_got_offsets[r_symndx]); 2078 relocation = (local_got_offsets[r_symndx] + 2079 s390_got_offset (info)); 2080 2081 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) 2082 relocation += s390_got_pointer (info); 2083 break; 2084 } 2085 default: 2086 break; 2087 } 2088 /* The output section is needed later in 2089 finish_dynamic_section when creating the dynamic 2090 relocation. */ 2091 local_plt[r_symndx].sec = sec; 2092 goto do_relocation; 2093 } 2094 else 2095 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2096 } 2097 else 2098 { 2099 bfd_boolean warned ATTRIBUTE_UNUSED; 2100 bfd_boolean ignored ATTRIBUTE_UNUSED; 2101 2102 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 2103 r_symndx, symtab_hdr, sym_hashes, 2104 h, sec, relocation, 2105 unresolved_reloc, warned, ignored); 2106 } 2107 2108 if (sec != NULL && discarded_section (sec)) 2109 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2110 rel, 1, relend, howto, 0, contents); 2111 2112 if (bfd_link_relocatable (info)) 2113 continue; 2114 2115 resolved_to_zero = (h != NULL 2116 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); 2117 2118 switch (r_type) 2119 { 2120 case R_390_GOTPLT12: 2121 case R_390_GOTPLT16: 2122 case R_390_GOTPLT20: 2123 case R_390_GOTPLT32: 2124 case R_390_GOTPLT64: 2125 case R_390_GOTPLTENT: 2126 /* There are three cases for a GOTPLT relocation. 1) The 2127 relocation is against the jump slot entry of a plt that 2128 will get emitted to the output file. 2) The relocation 2129 is against the jump slot of a plt entry that has been 2130 removed. elf_s390_adjust_gotplt has created a GOT entry 2131 as replacement. 3) The relocation is against a local symbol. 2132 Cases 2) and 3) are the same as the GOT relocation code 2133 so we just have to test for case 1 and fall through for 2134 the other two. */ 2135 if (h != NULL && h->plt.offset != (bfd_vma) -1) 2136 { 2137 bfd_vma plt_index; 2138 2139 if (s390_is_ifunc_symbol_p (h)) 2140 { 2141 /* Entry indices of .iplt and .igot.plt match 2142 1:1. No magic PLT first entry here. */ 2143 plt_index = h->plt.offset / PLT_ENTRY_SIZE; 2144 relocation = (plt_index * GOT_ENTRY_SIZE 2145 + s390_gotplt_offset (info) 2146 + htab->elf.igotplt->output_offset); 2147 } 2148 else 2149 { 2150 plt_index = ((h->plt.offset - PLT_FIRST_ENTRY_SIZE) 2151 / PLT_ENTRY_SIZE); 2152 2153 relocation = (plt_index * GOT_ENTRY_SIZE 2154 + s390_gotplt_offset (info)); 2155 } 2156 if (r_type == R_390_GOTPLTENT) 2157 relocation += s390_got_pointer (info); 2158 unresolved_reloc = FALSE; 2159 break; 2160 } 2161 /* Fall through. */ 2162 2163 case R_390_GOT12: 2164 case R_390_GOT16: 2165 case R_390_GOT20: 2166 case R_390_GOT32: 2167 case R_390_GOT64: 2168 case R_390_GOTENT: 2169 /* Relocation is to the entry for this symbol in the global 2170 offset table. */ 2171 if (htab->elf.sgot == NULL) 2172 abort (); 2173 2174 if (h != NULL) 2175 { 2176 bfd_boolean dyn; 2177 2178 off = h->got.offset; 2179 dyn = htab->elf.dynamic_sections_created; 2180 2181 if (s390_is_ifunc_symbol_p (h)) 2182 { 2183 BFD_ASSERT (h->plt.offset != (bfd_vma) -1); 2184 if (off == (bfd_vma)-1) 2185 { 2186 /* No explicit GOT usage so redirect to the 2187 got.iplt slot. */ 2188 relocation = (s390_gotplt_offset (info) 2189 + htab->elf.igotplt->output_offset 2190 + (h->plt.offset / PLT_ENTRY_SIZE 2191 * GOT_ENTRY_SIZE)); 2192 2193 /* For @GOTENT the relocation is against the offset between 2194 the instruction and the symbols entry in the GOT and not 2195 between the start of the GOT and the symbols entry. We 2196 add the vma of the GOT to get the correct value. */ 2197 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) 2198 relocation += s390_got_pointer (info); 2199 2200 break; 2201 } 2202 else 2203 { 2204 /* Explicit GOT slots must contain the address 2205 of the PLT slot. This will be handled in 2206 finish_dynamic_symbol. */ 2207 } 2208 } 2209 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 2210 bfd_link_pic (info), 2211 h) 2212 || (bfd_link_pic (info) 2213 && SYMBOL_REFERENCES_LOCAL (info, h)) 2214 || resolved_to_zero) 2215 { 2216 Elf_Internal_Sym *isym; 2217 asection *sym_sec; 2218 2219 /* This is actually a static link, or it is a 2220 -Bsymbolic link and the symbol is defined 2221 locally, or the symbol was forced to be local 2222 because of a version file. We must initialize 2223 this entry in the global offset table. Since the 2224 offset must always be a multiple of 2, we use the 2225 least significant bit to record whether we have 2226 initialized it already. 2227 2228 When doing a dynamic link, we create a .rel.got 2229 relocation entry to initialize the value. This 2230 is done in the finish_dynamic_symbol routine. */ 2231 if ((off & 1) != 0) 2232 off &= ~1; 2233 else 2234 { 2235 bfd_put_64 (output_bfd, relocation, 2236 htab->elf.sgot->contents + off); 2237 h->got.offset |= 1; 2238 } 2239 2240 /* When turning a GOT slot dereference into a direct 2241 reference using larl we have to make sure that 2242 the symbol is 1. properly aligned and 2. it is no 2243 ABS symbol or will become one. */ 2244 if ((h->def_regular 2245 && bfd_link_pic (info) 2246 && SYMBOL_REFERENCES_LOCAL (info, h)) 2247 /* lgrl rx,sym@GOTENT -> larl rx, sym */ 2248 && ((r_type == R_390_GOTENT 2249 && (bfd_get_16 (input_bfd, 2250 contents + rel->r_offset - 2) 2251 & 0xff0f) == 0xc408) 2252 /* lg rx, sym@GOT(r12) -> larl rx, sym */ 2253 || (r_type == R_390_GOT20 2254 && (bfd_get_32 (input_bfd, 2255 contents + rel->r_offset - 2) 2256 & 0xff00f000) == 0xe300c000 2257 && bfd_get_8 (input_bfd, 2258 contents + rel->r_offset + 3) == 0x04)) 2259 && (isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, 2260 input_bfd, r_symndx)) 2261 && isym->st_shndx != SHN_ABS 2262 && h != htab->elf.hdynamic 2263 && h != htab->elf.hgot 2264 && h != htab->elf.hplt 2265 && !(isym->st_value & 1) 2266 && (sym_sec = bfd_section_from_elf_index (input_bfd, 2267 isym->st_shndx)) 2268 && sym_sec->alignment_power) 2269 { 2270 unsigned short new_insn = 2271 (0xc000 | (bfd_get_8 (input_bfd, 2272 contents + rel->r_offset - 1) & 0xf0)); 2273 bfd_put_16 (output_bfd, new_insn, 2274 contents + rel->r_offset - 2); 2275 r_type = R_390_PC32DBL; 2276 rel->r_addend = 2; 2277 howto = elf_howto_table + r_type; 2278 relocation = h->root.u.def.value 2279 + h->root.u.def.section->output_section->vma 2280 + h->root.u.def.section->output_offset; 2281 goto do_relocation; 2282 } 2283 } 2284 else 2285 unresolved_reloc = FALSE; 2286 } 2287 else 2288 { 2289 if (local_got_offsets == NULL) 2290 abort (); 2291 2292 off = local_got_offsets[r_symndx]; 2293 2294 /* The offset must always be a multiple of 8. We use 2295 the least significant bit to record whether we have 2296 already generated the necessary reloc. */ 2297 if ((off & 1) != 0) 2298 off &= ~1; 2299 else 2300 { 2301 bfd_put_64 (output_bfd, relocation, 2302 htab->elf.sgot->contents + off); 2303 2304 if (bfd_link_pic (info)) 2305 { 2306 asection *s; 2307 Elf_Internal_Rela outrel; 2308 bfd_byte *loc; 2309 2310 s = htab->elf.srelgot; 2311 if (s == NULL) 2312 abort (); 2313 2314 outrel.r_offset = (htab->elf.sgot->output_section->vma 2315 + htab->elf.sgot->output_offset 2316 + off); 2317 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 2318 outrel.r_addend = relocation; 2319 loc = s->contents; 2320 loc += s->reloc_count++ * sizeof (Elf64_External_Rela); 2321 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2322 } 2323 2324 local_got_offsets[r_symndx] |= 1; 2325 } 2326 } 2327 2328 if (off >= (bfd_vma) -2) 2329 abort (); 2330 2331 relocation = s390_got_offset (info) + off; 2332 2333 /* For @GOTENT the relocation is against the offset between 2334 the instruction and the symbols entry in the GOT and not 2335 between the start of the GOT and the symbols entry. We 2336 add the vma of the GOT to get the correct value. */ 2337 if ( r_type == R_390_GOTENT 2338 || r_type == R_390_GOTPLTENT) 2339 relocation += s390_got_pointer (info); 2340 2341 break; 2342 2343 case R_390_GOTOFF16: 2344 case R_390_GOTOFF32: 2345 case R_390_GOTOFF64: 2346 /* Relocation is relative to the start of the global offset 2347 table. */ 2348 2349 if (h != NULL 2350 && s390_is_ifunc_symbol_p (h) 2351 && h->def_regular 2352 && !bfd_link_executable (info)) 2353 { 2354 relocation = (htab->elf.iplt->output_section->vma 2355 + htab->elf.iplt->output_offset 2356 + h->plt.offset 2357 - s390_got_pointer (info)); 2358 goto do_relocation; 2359 } 2360 2361 relocation -= s390_got_pointer (info); 2362 break; 2363 2364 case R_390_GOTPC: 2365 case R_390_GOTPCDBL: 2366 /* Use global offset table as symbol value. */ 2367 relocation = s390_got_pointer (info); 2368 unresolved_reloc = FALSE; 2369 break; 2370 2371 case R_390_PLT12DBL: 2372 case R_390_PLT16DBL: 2373 case R_390_PLT24DBL: 2374 case R_390_PLT32: 2375 case R_390_PLT32DBL: 2376 case R_390_PLT64: 2377 /* Relocation is to the entry for this symbol in the 2378 procedure linkage table. */ 2379 2380 /* Resolve a PLT32 reloc against a local symbol directly, 2381 without using the procedure linkage table. */ 2382 if (h == NULL) 2383 break; 2384 2385 if (h->plt.offset == (bfd_vma) -1 2386 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) 2387 { 2388 /* We didn't make a PLT entry for this symbol. This 2389 happens when statically linking PIC code, or when 2390 using -Bsymbolic. */ 2391 break; 2392 } 2393 if (s390_is_ifunc_symbol_p (h)) 2394 relocation = (htab->elf.iplt->output_section->vma 2395 + htab->elf.iplt->output_offset 2396 + h->plt.offset); 2397 else 2398 relocation = (htab->elf.splt->output_section->vma 2399 + htab->elf.splt->output_offset 2400 + h->plt.offset); 2401 unresolved_reloc = FALSE; 2402 break; 2403 2404 case R_390_PLTOFF16: 2405 case R_390_PLTOFF32: 2406 case R_390_PLTOFF64: 2407 /* Relocation is to the entry for this symbol in the 2408 procedure linkage table relative to the start of the GOT. */ 2409 2410 /* For local symbols or if we didn't make a PLT entry for 2411 this symbol resolve the symbol directly. */ 2412 if (h == NULL 2413 || h->plt.offset == (bfd_vma) -1 2414 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) 2415 { 2416 relocation -= s390_got_pointer (info); 2417 break; 2418 } 2419 2420 if (s390_is_ifunc_symbol_p (h)) 2421 relocation = (htab->elf.iplt->output_section->vma 2422 + htab->elf.iplt->output_offset 2423 + h->plt.offset 2424 - s390_got_pointer (info)); 2425 else 2426 relocation = (htab->elf.splt->output_section->vma 2427 + htab->elf.splt->output_offset 2428 + h->plt.offset 2429 - s390_got_pointer (info)); 2430 unresolved_reloc = FALSE; 2431 break; 2432 2433 case R_390_PC16: 2434 case R_390_PC12DBL: 2435 case R_390_PC16DBL: 2436 case R_390_PC24DBL: 2437 case R_390_PC32: 2438 case R_390_PC32DBL: 2439 case R_390_PC64: 2440 if (h != NULL 2441 && bfd_link_pie (info) 2442 && !h->def_regular) 2443 { 2444 _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined " 2445 "in shared library and accessed " 2446 "from executable " 2447 "(rebuild file with -fPIC ?)"), 2448 input_bfd, h->root.root.string); 2449 bfd_set_error (bfd_error_bad_value); 2450 return FALSE; 2451 } 2452 /* The target of these relocs are instruction operands 2453 residing in read-only sections. We cannot emit a runtime 2454 reloc for it. */ 2455 if (h != NULL 2456 && s390_is_ifunc_symbol_p (h) 2457 && h->def_regular 2458 && bfd_link_pic (info)) 2459 { 2460 relocation = (htab->elf.iplt->output_section->vma 2461 + htab->elf.iplt->output_offset 2462 + h->plt.offset); 2463 goto do_relocation; 2464 } 2465 /* Fall through. */ 2466 2467 case R_390_8: 2468 case R_390_16: 2469 case R_390_32: 2470 case R_390_64: 2471 2472 if ((input_section->flags & SEC_ALLOC) == 0) 2473 break; 2474 2475 if (h != NULL 2476 && s390_is_ifunc_symbol_p (h) 2477 && h->def_regular) 2478 { 2479 if (!bfd_link_pic (info)) 2480 { 2481 /* For a non-shared object the symbol will not 2482 change. Hence we can write the address of the 2483 target IPLT slot now. */ 2484 relocation = (htab->elf.iplt->output_section->vma 2485 + htab->elf.iplt->output_offset 2486 + h ->plt.offset); 2487 goto do_relocation; 2488 } 2489 else 2490 { 2491 /* For shared objects a runtime relocation is needed. */ 2492 2493 Elf_Internal_Rela outrel; 2494 asection *sreloc; 2495 2496 /* Need a dynamic relocation to get the real function 2497 address. */ 2498 outrel.r_offset = _bfd_elf_section_offset (output_bfd, 2499 info, 2500 input_section, 2501 rel->r_offset); 2502 if (outrel.r_offset == (bfd_vma) -1 2503 || outrel.r_offset == (bfd_vma) -2) 2504 abort (); 2505 2506 outrel.r_offset += (input_section->output_section->vma 2507 + input_section->output_offset); 2508 2509 if (h->dynindx == -1 2510 || h->forced_local 2511 || bfd_link_executable (info)) 2512 { 2513 /* This symbol is resolved locally. */ 2514 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE); 2515 outrel.r_addend = (h->root.u.def.value 2516 + h->root.u.def.section->output_section->vma 2517 + h->root.u.def.section->output_offset); 2518 } 2519 else 2520 { 2521 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); 2522 outrel.r_addend = 0; 2523 } 2524 2525 sreloc = htab->elf.irelifunc; 2526 elf_append_rela (output_bfd, sreloc, &outrel); 2527 2528 /* If this reloc is against an external symbol, we 2529 do not want to fiddle with the addend. Otherwise, 2530 we need to include the symbol value so that it 2531 becomes an addend for the dynamic reloc. For an 2532 internal symbol, we have updated addend. */ 2533 continue; 2534 } 2535 } 2536 2537 if ((bfd_link_pic (info) 2538 && (h == NULL 2539 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 2540 && !resolved_to_zero) 2541 || h->root.type != bfd_link_hash_undefweak) 2542 && ((r_type != R_390_PC16 2543 && r_type != R_390_PC12DBL 2544 && r_type != R_390_PC16DBL 2545 && r_type != R_390_PC24DBL 2546 && r_type != R_390_PC32 2547 && r_type != R_390_PC32DBL 2548 && r_type != R_390_PC64) 2549 || !SYMBOL_CALLS_LOCAL (info, h))) 2550 || (ELIMINATE_COPY_RELOCS 2551 && !bfd_link_pic (info) 2552 && h != NULL 2553 && h->dynindx != -1 2554 && !h->non_got_ref 2555 && ((h->def_dynamic 2556 && !h->def_regular) 2557 || h->root.type == bfd_link_hash_undefweak 2558 || h->root.type == bfd_link_hash_undefined))) 2559 { 2560 Elf_Internal_Rela outrel; 2561 bfd_boolean skip, relocate; 2562 asection *sreloc; 2563 bfd_byte *loc; 2564 2565 /* When generating a shared object, these relocations 2566 are copied into the output file to be resolved at run 2567 time. */ 2568 skip = FALSE; 2569 relocate = FALSE; 2570 2571 outrel.r_offset = 2572 _bfd_elf_section_offset (output_bfd, info, input_section, 2573 rel->r_offset); 2574 if (outrel.r_offset == (bfd_vma) -1) 2575 skip = TRUE; 2576 else if (outrel.r_offset == (bfd_vma) -2) 2577 skip = TRUE, relocate = TRUE; 2578 2579 outrel.r_offset += (input_section->output_section->vma 2580 + input_section->output_offset); 2581 2582 if (skip) 2583 memset (&outrel, 0, sizeof outrel); 2584 else if (h != NULL 2585 && h->dynindx != -1 2586 && (r_type == R_390_PC16 2587 || r_type == R_390_PC12DBL 2588 || r_type == R_390_PC16DBL 2589 || r_type == R_390_PC24DBL 2590 || r_type == R_390_PC32 2591 || r_type == R_390_PC32DBL 2592 || r_type == R_390_PC64 2593 || !bfd_link_pic (info) 2594 || !SYMBOLIC_BIND (info, h) 2595 || !h->def_regular)) 2596 { 2597 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); 2598 outrel.r_addend = rel->r_addend; 2599 } 2600 else 2601 { 2602 /* This symbol is local, or marked to become local. */ 2603 outrel.r_addend = relocation + rel->r_addend; 2604 if (r_type == R_390_64) 2605 { 2606 relocate = TRUE; 2607 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 2608 } 2609 else 2610 { 2611 long sindx; 2612 2613 if (bfd_is_abs_section (sec)) 2614 sindx = 0; 2615 else if (sec == NULL || sec->owner == NULL) 2616 { 2617 bfd_set_error(bfd_error_bad_value); 2618 return FALSE; 2619 } 2620 else 2621 { 2622 asection *osec; 2623 2624 osec = sec->output_section; 2625 sindx = elf_section_data (osec)->dynindx; 2626 2627 if (sindx == 0) 2628 { 2629 osec = htab->elf.text_index_section; 2630 sindx = elf_section_data (osec)->dynindx; 2631 } 2632 BFD_ASSERT (sindx != 0); 2633 2634 /* We are turning this relocation into one 2635 against a section symbol, so subtract out 2636 the output section's address but not the 2637 offset of the input section in the output 2638 section. */ 2639 outrel.r_addend -= osec->vma; 2640 } 2641 outrel.r_info = ELF64_R_INFO (sindx, r_type); 2642 } 2643 } 2644 2645 sreloc = elf_section_data (input_section)->sreloc; 2646 if (sreloc == NULL) 2647 abort (); 2648 2649 loc = sreloc->contents; 2650 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 2651 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2652 2653 /* If this reloc is against an external symbol, we do 2654 not want to fiddle with the addend. Otherwise, we 2655 need to include the symbol value so that it becomes 2656 an addend for the dynamic reloc. */ 2657 if (! relocate) 2658 continue; 2659 } 2660 2661 break; 2662 2663 /* Relocations for tls literal pool entries. */ 2664 case R_390_TLS_IE64: 2665 if (bfd_link_pic (info)) 2666 { 2667 Elf_Internal_Rela outrel; 2668 asection *sreloc; 2669 bfd_byte *loc; 2670 2671 outrel.r_offset = rel->r_offset 2672 + input_section->output_section->vma 2673 + input_section->output_offset; 2674 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 2675 sreloc = elf_section_data (input_section)->sreloc; 2676 if (sreloc == NULL) 2677 abort (); 2678 loc = sreloc->contents; 2679 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 2680 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc); 2681 } 2682 /* Fall through. */ 2683 2684 case R_390_TLS_GD64: 2685 case R_390_TLS_GOTIE64: 2686 r_type = elf_s390_tls_transition (info, r_type, h == NULL); 2687 tls_type = GOT_UNKNOWN; 2688 if (h == NULL && local_got_offsets) 2689 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 2690 else if (h != NULL) 2691 { 2692 tls_type = elf_s390_hash_entry(h)->tls_type; 2693 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE) 2694 r_type = R_390_TLS_LE64; 2695 } 2696 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE) 2697 r_type = R_390_TLS_IE64; 2698 2699 if (r_type == R_390_TLS_LE64) 2700 { 2701 /* This relocation gets optimized away by the local exec 2702 access optimization. */ 2703 BFD_ASSERT (! unresolved_reloc); 2704 bfd_put_64 (output_bfd, -tpoff (info, relocation), 2705 contents + rel->r_offset); 2706 continue; 2707 } 2708 2709 if (htab->elf.sgot == NULL) 2710 abort (); 2711 2712 if (h != NULL) 2713 off = h->got.offset; 2714 else 2715 { 2716 if (local_got_offsets == NULL) 2717 abort (); 2718 2719 off = local_got_offsets[r_symndx]; 2720 } 2721 2722 emit_tls_relocs: 2723 2724 if ((off & 1) != 0) 2725 off &= ~1; 2726 else 2727 { 2728 Elf_Internal_Rela outrel; 2729 bfd_byte *loc; 2730 int dr_type, indx; 2731 2732 if (htab->elf.srelgot == NULL) 2733 abort (); 2734 2735 outrel.r_offset = (htab->elf.sgot->output_section->vma 2736 + htab->elf.sgot->output_offset + off); 2737 2738 indx = h && h->dynindx != -1 ? h->dynindx : 0; 2739 if (r_type == R_390_TLS_GD64) 2740 dr_type = R_390_TLS_DTPMOD; 2741 else 2742 dr_type = R_390_TLS_TPOFF; 2743 if (dr_type == R_390_TLS_TPOFF && indx == 0) 2744 outrel.r_addend = relocation - dtpoff_base (info); 2745 else 2746 outrel.r_addend = 0; 2747 outrel.r_info = ELF64_R_INFO (indx, dr_type); 2748 loc = htab->elf.srelgot->contents; 2749 loc += htab->elf.srelgot->reloc_count++ 2750 * sizeof (Elf64_External_Rela); 2751 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2752 2753 if (r_type == R_390_TLS_GD64) 2754 { 2755 if (indx == 0) 2756 { 2757 BFD_ASSERT (! unresolved_reloc); 2758 bfd_put_64 (output_bfd, 2759 relocation - dtpoff_base (info), 2760 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); 2761 } 2762 else 2763 { 2764 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF); 2765 outrel.r_offset += GOT_ENTRY_SIZE; 2766 outrel.r_addend = 0; 2767 htab->elf.srelgot->reloc_count++; 2768 loc += sizeof (Elf64_External_Rela); 2769 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2770 } 2771 } 2772 2773 if (h != NULL) 2774 h->got.offset |= 1; 2775 else 2776 local_got_offsets[r_symndx] |= 1; 2777 } 2778 2779 if (off >= (bfd_vma) -2) 2780 abort (); 2781 if (r_type == ELF64_R_TYPE (rel->r_info)) 2782 { 2783 relocation = htab->elf.sgot->output_offset + off; 2784 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT) 2785 relocation += htab->elf.sgot->output_section->vma; 2786 unresolved_reloc = FALSE; 2787 } 2788 else 2789 { 2790 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off, 2791 contents + rel->r_offset); 2792 continue; 2793 } 2794 break; 2795 2796 case R_390_TLS_GOTIE12: 2797 case R_390_TLS_GOTIE20: 2798 case R_390_TLS_IEENT: 2799 if (h == NULL) 2800 { 2801 if (local_got_offsets == NULL) 2802 abort(); 2803 off = local_got_offsets[r_symndx]; 2804 if (bfd_link_pic (info)) 2805 goto emit_tls_relocs; 2806 } 2807 else 2808 { 2809 off = h->got.offset; 2810 tls_type = elf_s390_hash_entry(h)->tls_type; 2811 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE) 2812 goto emit_tls_relocs; 2813 } 2814 2815 if (htab->elf.sgot == NULL) 2816 abort (); 2817 2818 BFD_ASSERT (! unresolved_reloc); 2819 bfd_put_64 (output_bfd, -tpoff (info, relocation), 2820 htab->elf.sgot->contents + off); 2821 relocation = htab->elf.sgot->output_offset + off; 2822 if (r_type == R_390_TLS_IEENT) 2823 relocation += htab->elf.sgot->output_section->vma; 2824 unresolved_reloc = FALSE; 2825 break; 2826 2827 case R_390_TLS_LDM64: 2828 if (! bfd_link_pic (info)) 2829 /* The literal pool entry this relocation refers to gets ignored 2830 by the optimized code of the local exec model. Do nothing 2831 and the value will turn out zero. */ 2832 continue; 2833 2834 if (htab->elf.sgot == NULL) 2835 abort (); 2836 2837 off = htab->tls_ldm_got.offset; 2838 if (off & 1) 2839 off &= ~1; 2840 else 2841 { 2842 Elf_Internal_Rela outrel; 2843 bfd_byte *loc; 2844 2845 if (htab->elf.srelgot == NULL) 2846 abort (); 2847 2848 outrel.r_offset = (htab->elf.sgot->output_section->vma 2849 + htab->elf.sgot->output_offset + off); 2850 2851 bfd_put_64 (output_bfd, 0, 2852 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); 2853 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD); 2854 outrel.r_addend = 0; 2855 loc = htab->elf.srelgot->contents; 2856 loc += htab->elf.srelgot->reloc_count++ 2857 * sizeof (Elf64_External_Rela); 2858 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2859 htab->tls_ldm_got.offset |= 1; 2860 } 2861 relocation = htab->elf.sgot->output_offset + off; 2862 unresolved_reloc = FALSE; 2863 break; 2864 2865 case R_390_TLS_LE64: 2866 if (bfd_link_dll (info)) 2867 { 2868 /* Linking a shared library with non-fpic code requires 2869 a R_390_TLS_TPOFF relocation. */ 2870 Elf_Internal_Rela outrel; 2871 asection *sreloc; 2872 bfd_byte *loc; 2873 int indx; 2874 2875 outrel.r_offset = rel->r_offset 2876 + input_section->output_section->vma 2877 + input_section->output_offset; 2878 if (h != NULL && h->dynindx != -1) 2879 indx = h->dynindx; 2880 else 2881 indx = 0; 2882 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF); 2883 if (indx == 0) 2884 outrel.r_addend = relocation - dtpoff_base (info); 2885 else 2886 outrel.r_addend = 0; 2887 sreloc = elf_section_data (input_section)->sreloc; 2888 if (sreloc == NULL) 2889 abort (); 2890 loc = sreloc->contents; 2891 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 2892 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 2893 } 2894 else 2895 { 2896 BFD_ASSERT (! unresolved_reloc); 2897 bfd_put_64 (output_bfd, -tpoff (info, relocation), 2898 contents + rel->r_offset); 2899 } 2900 continue; 2901 2902 case R_390_TLS_LDO64: 2903 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING)) 2904 relocation -= dtpoff_base (info); 2905 else 2906 /* When converting LDO to LE, we must negate. */ 2907 relocation = -tpoff (info, relocation); 2908 break; 2909 2910 /* Relocations for tls instructions. */ 2911 case R_390_TLS_LOAD: 2912 case R_390_TLS_GDCALL: 2913 case R_390_TLS_LDCALL: 2914 tls_type = GOT_UNKNOWN; 2915 if (h == NULL && local_got_offsets) 2916 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; 2917 else if (h != NULL) 2918 tls_type = elf_s390_hash_entry(h)->tls_type; 2919 2920 if (tls_type == GOT_TLS_GD) 2921 continue; 2922 2923 if (r_type == R_390_TLS_LOAD) 2924 { 2925 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) 2926 { 2927 /* IE->LE transition. Four valid cases: 2928 lg %rx,(0,%ry) -> sllg %rx,%ry,0 2929 lg %rx,(%ry,0) -> sllg %rx,%ry,0 2930 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0 2931 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */ 2932 unsigned int insn0, insn1, ry; 2933 2934 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); 2935 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); 2936 if (insn1 != 0x0004) 2937 { 2938 invalid_tls_insn (input_bfd, input_section, rel); 2939 return FALSE; 2940 } 2941 if ((insn0 & 0xff00f000) == 0xe3000000) 2942 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */ 2943 ry = (insn0 & 0x000f0000); 2944 else if ((insn0 & 0xff0f0000) == 0xe3000000) 2945 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */ 2946 ry = (insn0 & 0x0000f000) << 4; 2947 else if ((insn0 & 0xff00f000) == 0xe300c000) 2948 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */ 2949 ry = (insn0 & 0x000f0000); 2950 else if ((insn0 & 0xff0f0000) == 0xe30c0000) 2951 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */ 2952 ry = (insn0 & 0x0000f000) << 4; 2953 else 2954 { 2955 invalid_tls_insn (input_bfd, input_section, rel); 2956 return FALSE; 2957 } 2958 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry; 2959 insn1 = 0x000d; 2960 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); 2961 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); 2962 } 2963 } 2964 else if (r_type == R_390_TLS_GDCALL) 2965 { 2966 unsigned int insn0, insn1; 2967 2968 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); 2969 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); 2970 if ((insn0 & 0xffff0000) != 0xc0e50000) 2971 { 2972 invalid_tls_insn (input_bfd, input_section, rel); 2973 return FALSE; 2974 } 2975 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) 2976 { 2977 /* GD->LE transition. 2978 brasl %r14,__tls_get_addr@plt -> brcl 0,. */ 2979 insn0 = 0xc0040000; 2980 insn1 = 0x0000; 2981 } 2982 else 2983 { 2984 /* GD->IE transition. 2985 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */ 2986 insn0 = 0xe322c000; 2987 insn1 = 0x0004; 2988 } 2989 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); 2990 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); 2991 } 2992 else if (r_type == R_390_TLS_LDCALL) 2993 { 2994 if (!bfd_link_pic (info)) 2995 { 2996 unsigned int insn0, insn1; 2997 2998 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); 2999 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); 3000 if ((insn0 & 0xffff0000) != 0xc0e50000) 3001 { 3002 invalid_tls_insn (input_bfd, input_section, rel); 3003 return FALSE; 3004 } 3005 /* LD->LE transition. 3006 brasl %r14,__tls_get_addr@plt -> brcl 0,. */ 3007 insn0 = 0xc0040000; 3008 insn1 = 0x0000; 3009 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); 3010 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); 3011 } 3012 } 3013 continue; 3014 3015 default: 3016 break; 3017 } 3018 3019 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections 3020 because such sections are not SEC_ALLOC and thus ld.so will 3021 not process them. */ 3022 if (unresolved_reloc 3023 && !((input_section->flags & SEC_DEBUGGING) != 0 3024 && h->def_dynamic) 3025 && _bfd_elf_section_offset (output_bfd, info, input_section, 3026 rel->r_offset) != (bfd_vma) -1) 3027 _bfd_error_handler 3028 /* xgettext:c-format */ 3029 (_("%pB(%pA+%#" PRIx64 "): " 3030 "unresolvable %s relocation against symbol `%s'"), 3031 input_bfd, 3032 input_section, 3033 (uint64_t) rel->r_offset, 3034 howto->name, 3035 h->root.root.string); 3036 3037 do_relocation: 3038 3039 /* When applying a 24 bit reloc we need to start one byte 3040 earlier. Otherwise the 32 bit get/put bfd operations might 3041 access a byte after the actual section. */ 3042 if (r_type == R_390_PC24DBL 3043 || r_type == R_390_PLT24DBL) 3044 rel->r_offset--; 3045 3046 if (r_type == R_390_20 3047 || r_type == R_390_GOT20 3048 || r_type == R_390_GOTPLT20 3049 || r_type == R_390_TLS_GOTIE20) 3050 { 3051 relocation += rel->r_addend; 3052 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; 3053 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3054 contents, rel->r_offset, 3055 relocation, 0); 3056 } 3057 else 3058 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3059 contents, rel->r_offset, 3060 relocation, rel->r_addend); 3061 3062 if (r != bfd_reloc_ok) 3063 { 3064 const char *name; 3065 3066 if (h != NULL) 3067 name = h->root.root.string; 3068 else 3069 { 3070 name = bfd_elf_string_from_elf_section (input_bfd, 3071 symtab_hdr->sh_link, 3072 sym->st_name); 3073 if (name == NULL) 3074 return FALSE; 3075 if (*name == '\0') 3076 name = bfd_section_name (sec); 3077 } 3078 3079 if (r == bfd_reloc_overflow) 3080 (*info->callbacks->reloc_overflow) 3081 (info, (h ? &h->root : NULL), name, howto->name, 3082 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 3083 else 3084 { 3085 _bfd_error_handler 3086 /* xgettext:c-format */ 3087 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"), 3088 input_bfd, input_section, 3089 (uint64_t) rel->r_offset, name, (int) r); 3090 return FALSE; 3091 } 3092 } 3093 } 3094 3095 return TRUE; 3096} 3097 3098/* Generate the PLT slots together with the dynamic relocations needed 3099 for IFUNC symbols. */ 3100 3101static void 3102elf_s390_finish_ifunc_symbol (bfd *output_bfd, 3103 struct bfd_link_info *info, 3104 struct elf_link_hash_entry *h, 3105 struct elf_s390_link_hash_table *htab, 3106 bfd_vma plt_offset, 3107 bfd_vma resolver_address) 3108{ 3109 bfd_vma plt_index; 3110 bfd_vma got_offset; 3111 Elf_Internal_Rela rela; 3112 bfd_byte *loc; 3113 asection *plt, *gotplt, *relplt; 3114 3115 if (htab->elf.iplt == NULL 3116 || htab->elf.igotplt == NULL 3117 || htab->elf.irelplt == NULL) 3118 abort (); 3119 3120 /* Index of the PLT slot within iplt section. */ 3121 plt_index = plt_offset / PLT_ENTRY_SIZE; 3122 plt = htab->elf.iplt; 3123 /* Offset into the igot.plt section. */ 3124 got_offset = plt_index * GOT_ENTRY_SIZE; 3125 gotplt = htab->elf.igotplt; 3126 relplt = htab->elf.irelplt; 3127 3128 /* Fill in the blueprint of a PLT. */ 3129 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry, 3130 PLT_ENTRY_SIZE); 3131 3132 /* Fixup the relative address to the GOT entry */ 3133 bfd_put_32 (output_bfd, 3134 (gotplt->output_section->vma + 3135 gotplt->output_offset + got_offset 3136 - (plt->output_section->vma + 3137 plt->output_offset + 3138 plt_offset))/2, 3139 plt->contents + plt_offset + 2); 3140 /* Fixup the relative branch to PLT 0 */ 3141 bfd_put_32 (output_bfd, - (plt->output_offset + 3142 (PLT_ENTRY_SIZE * plt_index) + 22)/2, 3143 plt->contents + plt_offset + 24); 3144 /* Fixup offset into .rela.plt section. */ 3145 bfd_put_32 (output_bfd, relplt->output_offset + 3146 plt_index * sizeof (Elf64_External_Rela), 3147 plt->contents + plt_offset + 28); 3148 3149 /* Fill in the entry in the global offset table. 3150 Points to instruction after GOT offset. */ 3151 bfd_put_64 (output_bfd, 3152 (plt->output_section->vma 3153 + plt->output_offset 3154 + plt_offset 3155 + 14), 3156 gotplt->contents + got_offset); 3157 3158 /* Fill in the entry in the .rela.plt section. */ 3159 rela.r_offset = (gotplt->output_section->vma 3160 + gotplt->output_offset 3161 + got_offset); 3162 3163 if (!h 3164 || h->dynindx == -1 3165 || ((bfd_link_executable (info) 3166 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 3167 && h->def_regular)) 3168 { 3169 /* The symbol can be locally resolved. */ 3170 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE); 3171 rela.r_addend = resolver_address; 3172 } 3173 else 3174 { 3175 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); 3176 rela.r_addend = 0; 3177 } 3178 3179 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela); 3180 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3181} 3182 3183 3184/* Finish up dynamic symbol handling. We set the contents of various 3185 dynamic sections here. */ 3186 3187static bfd_boolean 3188elf_s390_finish_dynamic_symbol (bfd *output_bfd, 3189 struct bfd_link_info *info, 3190 struct elf_link_hash_entry *h, 3191 Elf_Internal_Sym *sym) 3192{ 3193 struct elf_s390_link_hash_table *htab; 3194 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h; 3195 3196 htab = elf_s390_hash_table (info); 3197 if (htab == NULL) 3198 return FALSE; 3199 3200 if (h->plt.offset != (bfd_vma) -1) 3201 { 3202 bfd_vma plt_index; 3203 bfd_vma gotplt_offset; 3204 Elf_Internal_Rela rela; 3205 bfd_byte *loc; 3206 3207 /* This symbol has an entry in the procedure linkage table. Set 3208 it up. */ 3209 if (s390_is_ifunc_symbol_p (h) && h->def_regular) 3210 { 3211 elf_s390_finish_ifunc_symbol (output_bfd, info, h, 3212 htab, h->plt.offset, 3213 eh->ifunc_resolver_address + 3214 eh->ifunc_resolver_section->output_offset + 3215 eh->ifunc_resolver_section->output_section->vma); 3216 3217 /* Do not return yet. Handling of explicit GOT slots of 3218 IFUNC symbols is below. */ 3219 } 3220 else 3221 { 3222 if (h->dynindx == -1 3223 || htab->elf.splt == NULL 3224 || htab->elf.sgotplt == NULL 3225 || htab->elf.srelplt == NULL) 3226 abort (); 3227 3228 /* Calc. index no. 3229 Current offset - size first entry / entry size. */ 3230 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; 3231 3232 /* The slots in the .got.plt correspond to the PLT slots in 3233 the same order. */ 3234 gotplt_offset = plt_index * GOT_ENTRY_SIZE; 3235 3236 /* If .got.plt comes first it needs to contain the 3 header 3237 entries. */ 3238 if (!s390_gotplt_after_got_p (info)) 3239 gotplt_offset += 3 * GOT_ENTRY_SIZE; 3240 3241 /* Fill in the blueprint of a PLT. */ 3242 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry, 3243 PLT_ENTRY_SIZE); 3244 3245 /* The first instruction in the PLT entry is a LARL loading 3246 the address of the GOT slot. We write the 4 byte 3247 immediate operand of the LARL instruction here. */ 3248 bfd_put_32 (output_bfd, 3249 (htab->elf.sgotplt->output_section->vma + 3250 htab->elf.sgotplt->output_offset + gotplt_offset 3251 - (htab->elf.splt->output_section->vma + 3252 htab->elf.splt->output_offset + 3253 h->plt.offset))/2, 3254 htab->elf.splt->contents + h->plt.offset + 2); 3255 /* Fixup the relative branch to PLT 0 */ 3256 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE + 3257 (PLT_ENTRY_SIZE * plt_index) + 22)/2, 3258 htab->elf.splt->contents + h->plt.offset + 24); 3259 /* Fixup offset into .rela.plt section. */ 3260 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela), 3261 htab->elf.splt->contents + h->plt.offset + 28); 3262 3263 /* Fill in the entry in the global offset table. 3264 Points to instruction after GOT offset. */ 3265 bfd_put_64 (output_bfd, 3266 (htab->elf.splt->output_section->vma 3267 + htab->elf.splt->output_offset 3268 + h->plt.offset 3269 + 14), 3270 htab->elf.sgotplt->contents + gotplt_offset); 3271 3272 /* Fill in the entry in the .rela.plt section. */ 3273 rela.r_offset = (htab->elf.sgotplt->output_section->vma 3274 + htab->elf.sgotplt->output_offset 3275 + gotplt_offset); 3276 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); 3277 rela.r_addend = 0; 3278 loc = htab->elf.srelplt->contents + plt_index * 3279 sizeof (Elf64_External_Rela); 3280 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3281 3282 if (!h->def_regular) 3283 { 3284 /* Mark the symbol as undefined, rather than as defined in 3285 the .plt section. Leave the value alone. This is a clue 3286 for the dynamic linker, to make function pointer 3287 comparisons work between an application and shared 3288 library. */ 3289 sym->st_shndx = SHN_UNDEF; 3290 } 3291 } 3292 } 3293 3294 if (h->got.offset != (bfd_vma) -1 3295 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD 3296 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE 3297 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) 3298 { 3299 Elf_Internal_Rela rela; 3300 bfd_byte *loc; 3301 3302 /* This symbol has an entry in the global offset table. Set it 3303 up. */ 3304 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) 3305 abort (); 3306 3307 rela.r_offset = (htab->elf.sgot->output_section->vma 3308 + htab->elf.sgot->output_offset 3309 + (h->got.offset &~ (bfd_vma) 1)); 3310 3311 if (h->def_regular && s390_is_ifunc_symbol_p (h)) 3312 { 3313 if (bfd_link_pic (info)) 3314 { 3315 /* An explicit GOT slot usage needs GLOB_DAT. If the 3316 symbol references local the implicit got.iplt slot 3317 will be used and the IRELATIVE reloc has been created 3318 above. */ 3319 goto do_glob_dat; 3320 } 3321 else 3322 { 3323 /* For non-shared objects explicit GOT slots must be 3324 filled with the PLT slot address for pointer 3325 equality reasons. */ 3326 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma 3327 + htab->elf.iplt->output_offset 3328 + h->plt.offset), 3329 htab->elf.sgot->contents + h->got.offset); 3330 return TRUE; 3331 } 3332 } 3333 else if (bfd_link_pic (info) 3334 && SYMBOL_REFERENCES_LOCAL (info, h)) 3335 { 3336 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) 3337 return TRUE; 3338 3339 /* If this is a static link, or it is a -Bsymbolic link and 3340 the symbol is defined locally or was forced to be local 3341 because of a version file, we just want to emit a 3342 RELATIVE reloc. The entry in the global offset table 3343 will already have been initialized in the 3344 relocate_section function. */ 3345 if (!(h->def_regular || ELF_COMMON_DEF_P (h))) 3346 return FALSE; 3347 BFD_ASSERT((h->got.offset & 1) != 0); 3348 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE); 3349 rela.r_addend = (h->root.u.def.value 3350 + h->root.u.def.section->output_section->vma 3351 + h->root.u.def.section->output_offset); 3352 } 3353 else 3354 { 3355 BFD_ASSERT((h->got.offset & 1) == 0); 3356 do_glob_dat: 3357 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset); 3358 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT); 3359 rela.r_addend = 0; 3360 } 3361 3362 loc = htab->elf.srelgot->contents; 3363 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela); 3364 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3365 } 3366 3367 if (h->needs_copy) 3368 { 3369 Elf_Internal_Rela rela; 3370 asection *s; 3371 bfd_byte *loc; 3372 3373 /* This symbols needs a copy reloc. Set it up. */ 3374 3375 if (h->dynindx == -1 3376 || (h->root.type != bfd_link_hash_defined 3377 && h->root.type != bfd_link_hash_defweak) 3378 || htab->elf.srelbss == NULL) 3379 abort (); 3380 3381 rela.r_offset = (h->root.u.def.value 3382 + h->root.u.def.section->output_section->vma 3383 + h->root.u.def.section->output_offset); 3384 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY); 3385 rela.r_addend = 0; 3386 if (h->root.u.def.section == htab->elf.sdynrelro) 3387 s = htab->elf.sreldynrelro; 3388 else 3389 s = htab->elf.srelbss; 3390 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela); 3391 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 3392 } 3393 3394 /* Mark some specially defined symbols as absolute. */ 3395 if (h == htab->elf.hdynamic 3396 || h == htab->elf.hgot 3397 || h == htab->elf.hplt) 3398 sym->st_shndx = SHN_ABS; 3399 3400 return TRUE; 3401} 3402 3403/* Used to decide how to sort relocs in an optimal manner for the 3404 dynamic linker, before writing them out. */ 3405 3406static enum elf_reloc_type_class 3407elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 3408 const asection *rel_sec ATTRIBUTE_UNUSED, 3409 const Elf_Internal_Rela *rela) 3410{ 3411 bfd *abfd = info->output_bfd; 3412 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 3413 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info); 3414 unsigned long r_symndx = ELF64_R_SYM (rela->r_info); 3415 Elf_Internal_Sym sym; 3416 3417 if (htab->elf.dynsym == NULL 3418 || !bed->s->swap_symbol_in (abfd, 3419 (htab->elf.dynsym->contents 3420 + r_symndx * bed->s->sizeof_sym), 3421 0, &sym)) 3422 abort (); 3423 3424 /* Check relocation against STT_GNU_IFUNC symbol. */ 3425 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) 3426 return reloc_class_ifunc; 3427 3428 switch ((int) ELF64_R_TYPE (rela->r_info)) 3429 { 3430 case R_390_RELATIVE: 3431 return reloc_class_relative; 3432 case R_390_JMP_SLOT: 3433 return reloc_class_plt; 3434 case R_390_COPY: 3435 return reloc_class_copy; 3436 default: 3437 return reloc_class_normal; 3438 } 3439} 3440 3441/* Finish up the dynamic sections. */ 3442 3443static bfd_boolean 3444elf_s390_finish_dynamic_sections (bfd *output_bfd, 3445 struct bfd_link_info *info) 3446{ 3447 struct elf_s390_link_hash_table *htab; 3448 bfd *dynobj; 3449 asection *sdyn; 3450 bfd *ibfd; 3451 unsigned int i; 3452 3453 htab = elf_s390_hash_table (info); 3454 if (htab == NULL) 3455 return FALSE; 3456 3457 dynobj = htab->elf.dynobj; 3458 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 3459 3460 if (htab->elf.dynamic_sections_created) 3461 { 3462 Elf64_External_Dyn *dyncon, *dynconend; 3463 3464 if (sdyn == NULL || htab->elf.sgot == NULL) 3465 abort (); 3466 3467 dyncon = (Elf64_External_Dyn *) sdyn->contents; 3468 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); 3469 for (; dyncon < dynconend; dyncon++) 3470 { 3471 Elf_Internal_Dyn dyn; 3472 asection *s; 3473 3474 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); 3475 3476 switch (dyn.d_tag) 3477 { 3478 default: 3479 continue; 3480 3481 case DT_PLTGOT: 3482 /* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */ 3483 dyn.d_un.d_ptr = s390_got_pointer (info); 3484 break; 3485 3486 case DT_JMPREL: 3487 s = htab->elf.srelplt; 3488 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 3489 break; 3490 3491 case DT_PLTRELSZ: 3492 dyn.d_un.d_val = htab->elf.srelplt->size; 3493 if (htab->elf.irelplt) 3494 dyn.d_un.d_val += htab->elf.irelplt->size; 3495 break; 3496 3497 case DT_RELASZ: 3498 /* The procedure linkage table relocs (DT_JMPREL) should 3499 not be included in the overall relocs (DT_RELA). 3500 Therefore, we override the DT_RELASZ entry here to 3501 make it not include the JMPREL relocs. Since the 3502 linker script arranges for .rela.plt to follow all 3503 other relocation sections, we don't have to worry 3504 about changing the DT_RELA entry. */ 3505 dyn.d_un.d_val -= htab->elf.srelplt->size; 3506 if (htab->elf.irelplt) 3507 dyn.d_un.d_val -= htab->elf.irelplt->size; 3508 break; 3509 } 3510 3511 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); 3512 } 3513 3514 /* Fill in the special first entry in the procedure linkage table. */ 3515 if (htab->elf.splt && htab->elf.splt->size > 0) 3516 { 3517 /* fill in blueprint for plt 0 entry */ 3518 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry, 3519 PLT_FIRST_ENTRY_SIZE); 3520 /* The second instruction in the first PLT entry is a LARL 3521 loading the GOT pointer. Fill in the LARL immediate 3522 address. */ 3523 bfd_put_32 (output_bfd, 3524 (s390_got_pointer (info) 3525 - htab->elf.splt->output_section->vma 3526 - htab->elf.splt->output_offset - 6)/2, 3527 htab->elf.splt->contents + 8); 3528 } 3529 if (elf_section_data (htab->elf.splt->output_section) != NULL) 3530 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize 3531 = PLT_ENTRY_SIZE; 3532 } 3533 3534 if (htab->elf.hgot && htab->elf.hgot->root.u.def.section) 3535 { 3536 /* Fill in the first three entries in the global offset table. */ 3537 if (htab->elf.hgot->root.u.def.section->size > 0) 3538 { 3539 bfd_put_64 (output_bfd, 3540 (sdyn == NULL ? (bfd_vma) 0 3541 : sdyn->output_section->vma + sdyn->output_offset), 3542 htab->elf.hgot->root.u.def.section->contents); 3543 /* One entry for shared object struct ptr. */ 3544 bfd_put_64 (output_bfd, (bfd_vma) 0, 3545 htab->elf.hgot->root.u.def.section->contents + 8); 3546 /* One entry for _dl_runtime_resolve. */ 3547 bfd_put_64 (output_bfd, (bfd_vma) 0, 3548 htab->elf.hgot->root.u.def.section->contents + 16); 3549 } 3550 elf_section_data (htab->elf.sgot->output_section) 3551 ->this_hdr.sh_entsize = 8; 3552 } 3553 3554 /* Finish dynamic symbol for local IFUNC symbols. */ 3555 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 3556 { 3557 struct plt_entry *local_plt; 3558 Elf_Internal_Sym *isym; 3559 Elf_Internal_Shdr *symtab_hdr; 3560 3561 symtab_hdr = &elf_symtab_hdr (ibfd); 3562 3563 if (!is_s390_elf (ibfd)) 3564 continue; 3565 3566 local_plt = elf_s390_local_plt (ibfd); 3567 if (local_plt != NULL) 3568 for (i = 0; i < symtab_hdr->sh_info; i++) 3569 { 3570 if (local_plt[i].plt.offset != (bfd_vma) -1) 3571 { 3572 asection *sec = local_plt[i].sec; 3573 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, ibfd, i); 3574 if (isym == NULL) 3575 return FALSE; 3576 3577 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 3578 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab, 3579 local_plt[i].plt.offset, 3580 isym->st_value 3581 + sec->output_section->vma 3582 + sec->output_offset); 3583 3584 } 3585 } 3586 } 3587 3588 return TRUE; 3589} 3590 3591/* Support for core dump NOTE sections. */ 3592 3593static bfd_boolean 3594elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 3595{ 3596 int offset; 3597 size_t size; 3598 3599 switch (note->descsz) 3600 { 3601 default: 3602 return FALSE; 3603 3604 case 336: /* sizeof(struct elf_prstatus) on s390x */ 3605 /* pr_cursig */ 3606 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 3607 3608 /* pr_pid */ 3609 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32); 3610 3611 /* pr_reg */ 3612 offset = 112; 3613 size = 216; 3614 break; 3615 } 3616 3617 /* Make a ".reg/999" section. */ 3618 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 3619 size, note->descpos + offset); 3620} 3621 3622static bfd_boolean 3623elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 3624{ 3625 switch (note->descsz) 3626 { 3627 default: 3628 return FALSE; 3629 3630 case 136: /* sizeof(struct elf_prpsinfo) on s390x */ 3631 elf_tdata (abfd)->core->pid 3632 = bfd_get_32 (abfd, note->descdata + 24); 3633 elf_tdata (abfd)->core->program 3634 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); 3635 elf_tdata (abfd)->core->command 3636 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); 3637 } 3638 3639 /* Note that for some reason, a spurious space is tacked 3640 onto the end of the args in some (at least one anyway) 3641 implementations, so strip it off if it exists. */ 3642 3643 { 3644 char *command = elf_tdata (abfd)->core->command; 3645 int n = strlen (command); 3646 3647 if (0 < n && command[n - 1] == ' ') 3648 command[n - 1] = '\0'; 3649 } 3650 3651 return TRUE; 3652} 3653 3654static char * 3655elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz, 3656 int note_type, ...) 3657{ 3658 va_list ap; 3659 3660 switch (note_type) 3661 { 3662 default: 3663 return NULL; 3664 3665 case NT_PRPSINFO: 3666 { 3667 char data[136] ATTRIBUTE_NONSTRING = { 0 }; 3668 const char *fname, *psargs; 3669 3670 va_start (ap, note_type); 3671 fname = va_arg (ap, const char *); 3672 psargs = va_arg (ap, const char *); 3673 va_end (ap); 3674 3675 strncpy (data + 40, fname, 16); 3676#if GCC_VERSION == 8000 || GCC_VERSION == 8001 3677 DIAGNOSTIC_PUSH; 3678 /* GCC 8.0 and 8.1 warn about 80 equals destination size with 3679 -Wstringop-truncation: 3680 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643 3681 */ 3682 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION; 3683#endif 3684 strncpy (data + 56, psargs, 80); 3685#if GCC_VERSION == 8000 || GCC_VERSION == 8001 3686 DIAGNOSTIC_POP; 3687#endif 3688 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, 3689 &data, sizeof (data)); 3690 } 3691 3692 case NT_PRSTATUS: 3693 { 3694 char data[336] = { 0 }; 3695 long pid; 3696 int cursig; 3697 const void *gregs; 3698 3699 va_start (ap, note_type); 3700 pid = va_arg (ap, long); 3701 cursig = va_arg (ap, int); 3702 gregs = va_arg (ap, const void *); 3703 va_end (ap); 3704 3705 bfd_put_16 (abfd, cursig, data + 12); 3706 bfd_put_32 (abfd, pid, data + 32); 3707 memcpy (data + 112, gregs, 216); 3708 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, 3709 &data, sizeof (data)); 3710 } 3711 } 3712 /* NOTREACHED */ 3713} 3714 3715/* Return address for Ith PLT stub in section PLT, for relocation REL 3716 or (bfd_vma) -1 if it should not be included. */ 3717 3718static bfd_vma 3719elf_s390_plt_sym_val (bfd_vma i, const asection *plt, 3720 const arelent *rel ATTRIBUTE_UNUSED) 3721{ 3722 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; 3723} 3724 3725/* Merge backend specific data from an object file to the output 3726 object file when linking. */ 3727 3728static bfd_boolean 3729elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 3730{ 3731 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd)) 3732 return TRUE; 3733 3734 return elf_s390_merge_obj_attributes (ibfd, info); 3735} 3736 3737/* We may add a PT_S390_PGSTE program header. */ 3738 3739static int 3740elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED, 3741 struct bfd_link_info *info) 3742{ 3743 struct elf_s390_link_hash_table *htab; 3744 3745 if (info) 3746 { 3747 htab = elf_s390_hash_table (info); 3748 if (htab) 3749 return htab->params->pgste; 3750 } 3751 return 0; 3752} 3753 3754 3755/* Add the PT_S390_PGSTE program header. */ 3756 3757static bfd_boolean 3758elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info) 3759{ 3760 struct elf_s390_link_hash_table *htab; 3761 struct elf_segment_map *m, *pm = NULL; 3762 3763 if (!abfd || !info) 3764 return TRUE; 3765 3766 htab = elf_s390_hash_table (info); 3767 if (!htab || !htab->params->pgste) 3768 return TRUE; 3769 3770 /* If there is already a PT_S390_PGSTE header, avoid adding 3771 another. */ 3772 m = elf_seg_map (abfd); 3773 while (m && m->p_type != PT_S390_PGSTE) 3774 { 3775 pm = m; 3776 m = m->next; 3777 } 3778 3779 if (m) 3780 return TRUE; 3781 3782 m = (struct elf_segment_map *) 3783 bfd_zalloc (abfd, sizeof (struct elf_segment_map)); 3784 if (m == NULL) 3785 return FALSE; 3786 m->p_type = PT_S390_PGSTE; 3787 m->count = 0; 3788 m->next = NULL; 3789 if (pm) 3790 pm->next = m; 3791 3792 return TRUE; 3793} 3794 3795bfd_boolean 3796bfd_elf_s390_set_options (struct bfd_link_info *info, 3797 struct s390_elf_params *params) 3798{ 3799 struct elf_s390_link_hash_table *htab; 3800 3801 if (info) 3802 { 3803 htab = elf_s390_hash_table (info); 3804 if (htab) 3805 htab->params = params; 3806 } 3807 3808 return TRUE; 3809} 3810 3811 3812/* Why was the hash table entry size definition changed from 3813 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and 3814 this is the only reason for the s390_elf64_size_info structure. */ 3815 3816const struct elf_size_info s390_elf64_size_info = 3817{ 3818 sizeof (Elf64_External_Ehdr), 3819 sizeof (Elf64_External_Phdr), 3820 sizeof (Elf64_External_Shdr), 3821 sizeof (Elf64_External_Rel), 3822 sizeof (Elf64_External_Rela), 3823 sizeof (Elf64_External_Sym), 3824 sizeof (Elf64_External_Dyn), 3825 sizeof (Elf_External_Note), 3826 8, /* hash-table entry size. */ 3827 1, /* internal relocations per external relocations. */ 3828 64, /* arch_size. */ 3829 3, /* log_file_align. */ 3830 ELFCLASS64, EV_CURRENT, 3831 bfd_elf64_write_out_phdrs, 3832 bfd_elf64_write_shdrs_and_ehdr, 3833 bfd_elf64_checksum_contents, 3834 bfd_elf64_write_relocs, 3835 bfd_elf64_swap_symbol_in, 3836 bfd_elf64_swap_symbol_out, 3837 bfd_elf64_slurp_reloc_table, 3838 bfd_elf64_slurp_symbol_table, 3839 bfd_elf64_swap_dyn_in, 3840 bfd_elf64_swap_dyn_out, 3841 bfd_elf64_swap_reloc_in, 3842 bfd_elf64_swap_reloc_out, 3843 bfd_elf64_swap_reloca_in, 3844 bfd_elf64_swap_reloca_out 3845}; 3846 3847#define TARGET_BIG_SYM s390_elf64_vec 3848#define TARGET_BIG_NAME "elf64-s390" 3849#define ELF_ARCH bfd_arch_s390 3850#define ELF_TARGET_ID S390_ELF_DATA 3851#define ELF_MACHINE_CODE EM_S390 3852#define ELF_MACHINE_ALT1 EM_S390_OLD 3853#define ELF_MAXPAGESIZE 0x1000 3854 3855#define elf_backend_size_info s390_elf64_size_info 3856 3857#define elf_backend_can_gc_sections 1 3858#define elf_backend_can_refcount 1 3859#define elf_backend_want_got_plt 1 3860#define elf_backend_plt_readonly 1 3861#define elf_backend_want_plt_sym 0 3862#define elf_backend_got_header_size 24 3863#define elf_backend_want_dynrelro 1 3864#define elf_backend_rela_normal 1 3865 3866#define elf_info_to_howto elf_s390_info_to_howto 3867 3868#define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name 3869#define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create 3870#define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup 3871#define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup 3872#define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data 3873 3874#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol 3875#define elf_backend_check_relocs elf_s390_check_relocs 3876#define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol 3877#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections 3878#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections 3879#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol 3880#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook 3881#define elf_backend_reloc_type_class elf_s390_reloc_type_class 3882#define elf_backend_relocate_section elf_s390_relocate_section 3883#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections 3884#define elf_backend_init_index_section _bfd_elf_init_1_index_section 3885#define elf_backend_grok_prstatus elf_s390_grok_prstatus 3886#define elf_backend_grok_psinfo elf_s390_grok_psinfo 3887#define elf_backend_write_core_note elf_s390_write_core_note 3888#define elf_backend_plt_sym_val elf_s390_plt_sym_val 3889#define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p 3890#define elf_backend_additional_program_headers elf_s390_additional_program_headers 3891#define elf_backend_modify_segment_map elf_s390_modify_segment_map 3892 3893#define bfd_elf64_mkobject elf_s390_mkobject 3894#define elf_backend_object_p elf_s390_object_p 3895 3896#include "elf64-target.h" 3897