1/* SPARC-specific support for ELF 2 Copyright (C) 2005-2022 Free Software Foundation, Inc. 3 4 This file is part of BFD, the Binary File Descriptor library. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 19 MA 02110-1301, USA. */ 20 21 22/* This file handles functionality common to the different SPARC ABI's. */ 23 24#include "sysdep.h" 25#include "bfd.h" 26#include "bfdlink.h" 27#include "libbfd.h" 28#include "libiberty.h" 29#include "elf-bfd.h" 30#include "elf/sparc.h" 31#include "opcode/sparc.h" 32#include "elfxx-sparc.h" 33#include "elf-vxworks.h" 34#include "objalloc.h" 35#include "hashtab.h" 36 37/* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ 38#define MINUS_ONE (~ (bfd_vma) 0) 39 40#define ABI_64_P(abfd) \ 41 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64) 42 43/* The relocation "howto" table. */ 44 45/* Utility for performing the standard initial work of an instruction 46 relocation. 47 *PRELOCATION will contain the relocated item. 48 *PINSN will contain the instruction from the input stream. 49 If the result is `bfd_reloc_other' the caller can continue with 50 performing the relocation. Otherwise it must stop and return the 51 value to its caller. */ 52 53static bfd_reloc_status_type 54init_insn_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 55 void * data, asection *input_section, bfd *output_bfd, 56 bfd_vma *prelocation, bfd_vma *pinsn) 57{ 58 bfd_vma relocation; 59 reloc_howto_type *howto = reloc_entry->howto; 60 61 if (output_bfd != (bfd *) NULL 62 && (symbol->flags & BSF_SECTION_SYM) == 0 63 && (! howto->partial_inplace 64 || reloc_entry->addend == 0)) 65 { 66 reloc_entry->address += input_section->output_offset; 67 return bfd_reloc_ok; 68 } 69 70 /* This works because partial_inplace is FALSE. */ 71 if (output_bfd != NULL) 72 return bfd_reloc_continue; 73 74 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 75 return bfd_reloc_outofrange; 76 77 relocation = (symbol->value 78 + symbol->section->output_section->vma 79 + symbol->section->output_offset); 80 relocation += reloc_entry->addend; 81 if (howto->pc_relative) 82 { 83 relocation -= (input_section->output_section->vma 84 + input_section->output_offset); 85 relocation -= reloc_entry->address; 86 } 87 88 *prelocation = relocation; 89 *pinsn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); 90 return bfd_reloc_other; 91} 92 93/* For unsupported relocs. */ 94 95static bfd_reloc_status_type 96sparc_elf_notsup_reloc (bfd *abfd ATTRIBUTE_UNUSED, 97 arelent *reloc_entry ATTRIBUTE_UNUSED, 98 asymbol *symbol ATTRIBUTE_UNUSED, 99 void * data ATTRIBUTE_UNUSED, 100 asection *input_section ATTRIBUTE_UNUSED, 101 bfd *output_bfd ATTRIBUTE_UNUSED, 102 char **error_message ATTRIBUTE_UNUSED) 103{ 104 return bfd_reloc_notsupported; 105} 106 107/* Handle the WDISP16 reloc. */ 108 109static bfd_reloc_status_type 110sparc_elf_wdisp16_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 111 void * data, asection *input_section, bfd *output_bfd, 112 char **error_message ATTRIBUTE_UNUSED) 113{ 114 bfd_vma relocation; 115 bfd_vma insn; 116 bfd_reloc_status_type status; 117 118 status = init_insn_reloc (abfd, reloc_entry, symbol, data, 119 input_section, output_bfd, &relocation, &insn); 120 if (status != bfd_reloc_other) 121 return status; 122 123 insn &= ~ (bfd_vma) 0x303fff; 124 insn |= (((relocation >> 2) & 0xc000) << 6) | ((relocation >> 2) & 0x3fff); 125 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); 126 127 if ((bfd_signed_vma) relocation < - 0x40000 128 || (bfd_signed_vma) relocation > 0x3ffff) 129 return bfd_reloc_overflow; 130 else 131 return bfd_reloc_ok; 132} 133 134/* Handle the WDISP10 reloc. */ 135 136static bfd_reloc_status_type 137sparc_elf_wdisp10_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 138 void * data, asection *input_section, bfd *output_bfd, 139 char **error_message ATTRIBUTE_UNUSED) 140{ 141 bfd_vma relocation; 142 bfd_vma insn; 143 bfd_reloc_status_type status; 144 145 status = init_insn_reloc (abfd, reloc_entry, symbol, data, 146 input_section, output_bfd, &relocation, &insn); 147 if (status != bfd_reloc_other) 148 return status; 149 150 insn &= ~ (bfd_vma) 0x181fe0; 151 insn |= (((relocation >> 2) & 0x300) << 11) 152 | (((relocation >> 2) & 0xff) << 5); 153 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); 154 155 if ((bfd_signed_vma) relocation < - 0x1000 156 || (bfd_signed_vma) relocation > 0xfff) 157 return bfd_reloc_overflow; 158 else 159 return bfd_reloc_ok; 160} 161 162/* Handle the HIX22 reloc. */ 163 164static bfd_reloc_status_type 165sparc_elf_hix22_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 166 void * data, asection *input_section, bfd *output_bfd, 167 char **error_message ATTRIBUTE_UNUSED) 168{ 169 bfd_vma relocation; 170 bfd_vma insn; 171 bfd_reloc_status_type status; 172 173 status = init_insn_reloc (abfd, reloc_entry, symbol, data, 174 input_section, output_bfd, &relocation, &insn); 175 if (status != bfd_reloc_other) 176 return status; 177 178 relocation ^= MINUS_ONE; 179 insn = (insn &~ (bfd_vma) 0x3fffff) | ((relocation >> 10) & 0x3fffff); 180 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); 181 182 if ((relocation & ~ (bfd_vma) 0xffffffff) != 0) 183 return bfd_reloc_overflow; 184 else 185 return bfd_reloc_ok; 186} 187 188/* Handle the LOX10 reloc. */ 189 190static bfd_reloc_status_type 191sparc_elf_lox10_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 192 void * data, asection *input_section, bfd *output_bfd, 193 char **error_message ATTRIBUTE_UNUSED) 194{ 195 bfd_vma relocation; 196 bfd_vma insn; 197 bfd_reloc_status_type status; 198 199 status = init_insn_reloc (abfd, reloc_entry, symbol, data, 200 input_section, output_bfd, &relocation, &insn); 201 if (status != bfd_reloc_other) 202 return status; 203 204 insn = (insn &~ (bfd_vma) 0x1fff) | 0x1c00 | (relocation & 0x3ff); 205 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); 206 207 return bfd_reloc_ok; 208} 209 210static reloc_howto_type _bfd_sparc_elf_howto_table[] = 211{ 212 HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), 213 HOWTO(R_SPARC_8, 0,1, 8,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_8", false,0,0x000000ff,true), 214 HOWTO(R_SPARC_16, 0,2,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_16", false,0,0x0000ffff,true), 215 HOWTO(R_SPARC_32, 0,4,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_32", false,0,0xffffffff,true), 216 HOWTO(R_SPARC_DISP8, 0,1, 8,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP8", false,0,0x000000ff,true), 217 HOWTO(R_SPARC_DISP16, 0,2,16,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP16", false,0,0x0000ffff,true), 218 HOWTO(R_SPARC_DISP32, 0,4,32,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP32", false,0,0xffffffff,true), 219 HOWTO(R_SPARC_WDISP30, 2,4,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP30", false,0,0x3fffffff,true), 220 HOWTO(R_SPARC_WDISP22, 2,4,22,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP22", false,0,0x003fffff,true), 221 HOWTO(R_SPARC_HI22, 10,4,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HI22", false,0,0x003fffff,true), 222 HOWTO(R_SPARC_22, 0,4,22,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_22", false,0,0x003fffff,true), 223 HOWTO(R_SPARC_13, 0,4,13,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_13", false,0,0x00001fff,true), 224 HOWTO(R_SPARC_LO10, 0,4,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LO10", false,0,0x000003ff,true), 225 HOWTO(R_SPARC_GOT10, 0,4,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT10", false,0,0x000003ff,true), 226 HOWTO(R_SPARC_GOT13, 0,4,13,false,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_GOT13", false,0,0x00001fff,true), 227 HOWTO(R_SPARC_GOT22, 10,4,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT22", false,0,0x003fffff,true), 228 HOWTO(R_SPARC_PC10, 0,4,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC10", false,0,0x000003ff,true), 229 HOWTO(R_SPARC_PC22, 10,4,22,true, 0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PC22", false,0,0x003fffff,true), 230 HOWTO(R_SPARC_WPLT30, 2,4,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WPLT30", false,0,0x3fffffff,true), 231 HOWTO(R_SPARC_COPY, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_COPY", false,0,0x00000000,true), 232 HOWTO(R_SPARC_GLOB_DAT, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GLOB_DAT",false,0,0x00000000,true), 233 HOWTO(R_SPARC_JMP_SLOT, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_JMP_SLOT",false,0,0x00000000,true), 234 HOWTO(R_SPARC_RELATIVE, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_RELATIVE",false,0,0x00000000,true), 235 HOWTO(R_SPARC_UA32, 0,4,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA32", false,0,0xffffffff,true), 236 HOWTO(R_SPARC_PLT32, 0,4,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PLT32", false,0,0xffffffff,true), 237 HOWTO(R_SPARC_HIPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_HIPLT22", false,0,0x00000000,true), 238 HOWTO(R_SPARC_LOPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_LOPLT10", false,0,0x00000000,true), 239 HOWTO(R_SPARC_PCPLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT32", false,0,0x00000000,true), 240 HOWTO(R_SPARC_PCPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT22", false,0,0x00000000,true), 241 HOWTO(R_SPARC_PCPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT10", false,0,0x00000000,true), 242 HOWTO(R_SPARC_10, 0,4,10,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_10", false,0,0x000003ff,true), 243 HOWTO(R_SPARC_11, 0,4,11,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_11", false,0,0x000007ff,true), 244 HOWTO(R_SPARC_64, 0,8,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_64", false,0,MINUS_ONE, true), 245 HOWTO(R_SPARC_OLO10, 0,4,13,false,0,complain_overflow_signed, sparc_elf_notsup_reloc, "R_SPARC_OLO10", false,0,0x00001fff,true), 246 HOWTO(R_SPARC_HH22, 42,4,22,false,0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_HH22", false,0,0x003fffff,true), 247 HOWTO(R_SPARC_HM10, 32,4,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HM10", false,0,0x000003ff,true), 248 HOWTO(R_SPARC_LM22, 10,4,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LM22", false,0,0x003fffff,true), 249 HOWTO(R_SPARC_PC_HH22, 42,4,22,true, 0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_PC_HH22", false,0,0x003fffff,true), 250 HOWTO(R_SPARC_PC_HM10, 32,4,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC_HM10", false,0,0x000003ff,true), 251 HOWTO(R_SPARC_PC_LM22, 10,4,22,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC_LM22", false,0,0x003fffff,true), 252 HOWTO(R_SPARC_WDISP16, 2,4,16,true, 0,complain_overflow_signed, sparc_elf_wdisp16_reloc,"R_SPARC_WDISP16", false,0,0x00000000,true), 253 HOWTO(R_SPARC_WDISP19, 2,4,19,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP19", false,0,0x0007ffff,true), 254 HOWTO(R_SPARC_UNUSED_42, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_UNUSED_42",false,0,0x00000000,true), 255 HOWTO(R_SPARC_7, 0,4, 7,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_7", false,0,0x0000007f,true), 256 HOWTO(R_SPARC_5, 0,4, 5,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_5", false,0,0x0000001f,true), 257 HOWTO(R_SPARC_6, 0,4, 6,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_6", false,0,0x0000003f,true), 258 HOWTO(R_SPARC_DISP64, 0,8,64,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP64", false,0,MINUS_ONE, true), 259 HOWTO(R_SPARC_PLT64, 0,8,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PLT64", false,0,MINUS_ONE, true), 260 HOWTO(R_SPARC_HIX22, 0,8, 0,false,0,complain_overflow_bitfield,sparc_elf_hix22_reloc, "R_SPARC_HIX22", false,0,MINUS_ONE, false), 261 HOWTO(R_SPARC_LOX10, 0,8, 0,false,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_LOX10", false,0,MINUS_ONE, false), 262 HOWTO(R_SPARC_H44, 22,4,22,false,0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_H44", false,0,0x003fffff,false), 263 HOWTO(R_SPARC_M44, 12,4,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_M44", false,0,0x000003ff,false), 264 HOWTO(R_SPARC_L44, 0,4,13,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_L44", false,0,0x00000fff,false), 265 HOWTO(R_SPARC_REGISTER, 0,8, 0,false,0,complain_overflow_bitfield,sparc_elf_notsup_reloc, "R_SPARC_REGISTER",false,0,MINUS_ONE, false), 266 HOWTO(R_SPARC_UA64, 0,8,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA64", false,0,MINUS_ONE, true), 267 HOWTO(R_SPARC_UA16, 0,2,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA16", false,0,0x0000ffff,true), 268 HOWTO(R_SPARC_TLS_GD_HI22,10,4,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_GD_HI22",false,0,0x003fffff,true), 269 HOWTO(R_SPARC_TLS_GD_LO10,0,4,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_GD_LO10",false,0,0x000003ff,true), 270 HOWTO(R_SPARC_TLS_GD_ADD,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_GD_ADD",false,0,0x00000000,true), 271 HOWTO(R_SPARC_TLS_GD_CALL,2,4,30,true,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_TLS_GD_CALL",false,0,0x3fffffff,true), 272 HOWTO(R_SPARC_TLS_LDM_HI22,10,4,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_LDM_HI22",false,0,0x003fffff,true), 273 HOWTO(R_SPARC_TLS_LDM_LO10,0,4,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_LDM_LO10",false,0,0x000003ff,true), 274 HOWTO(R_SPARC_TLS_LDM_ADD,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_LDM_ADD",false,0,0x00000000,true), 275 HOWTO(R_SPARC_TLS_LDM_CALL,2,4,30,true,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_TLS_LDM_CALL",false,0,0x3fffffff,true), 276 HOWTO(R_SPARC_TLS_LDO_HIX22,0,4,0,false,0,complain_overflow_bitfield,sparc_elf_hix22_reloc,"R_SPARC_TLS_LDO_HIX22",false,0,0x003fffff, false), 277 HOWTO(R_SPARC_TLS_LDO_LOX10,0,4,0,false,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_TLS_LDO_LOX10",false,0,0x000003ff, false), 278 HOWTO(R_SPARC_TLS_LDO_ADD,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_LDO_ADD",false,0,0x00000000,true), 279 HOWTO(R_SPARC_TLS_IE_HI22,10,4,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_IE_HI22",false,0,0x003fffff,true), 280 HOWTO(R_SPARC_TLS_IE_LO10,0,4,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_IE_LO10",false,0,0x000003ff,true), 281 HOWTO(R_SPARC_TLS_IE_LD,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_IE_LD",false,0,0x00000000,true), 282 HOWTO(R_SPARC_TLS_IE_LDX,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_IE_LDX",false,0,0x00000000,true), 283 HOWTO(R_SPARC_TLS_IE_ADD,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_IE_ADD",false,0,0x00000000,true), 284 HOWTO(R_SPARC_TLS_LE_HIX22,0,4,0,false,0,complain_overflow_bitfield,sparc_elf_hix22_reloc, "R_SPARC_TLS_LE_HIX22",false,0,0x003fffff, false), 285 HOWTO(R_SPARC_TLS_LE_LOX10,0,4,0,false,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_TLS_LE_LOX10",false,0,0x000003ff, false), 286 HOWTO(R_SPARC_TLS_DTPMOD32,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_DTPMOD32",false,0,0x00000000,true), 287 HOWTO(R_SPARC_TLS_DTPMOD64,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_DTPMOD64",false,0,0x00000000,true), 288 HOWTO(R_SPARC_TLS_DTPOFF32,0,4,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,"R_SPARC_TLS_DTPOFF32",false,0,0xffffffff,true), 289 HOWTO(R_SPARC_TLS_DTPOFF64,0,8,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,"R_SPARC_TLS_DTPOFF64",false,0,MINUS_ONE,true), 290 HOWTO(R_SPARC_TLS_TPOFF32,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_TPOFF32",false,0,0x00000000,true), 291 HOWTO(R_SPARC_TLS_TPOFF64,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_TPOFF64",false,0,0x00000000,true), 292 HOWTO(R_SPARC_GOTDATA_HIX22,0,4,0,false,0,complain_overflow_bitfield,sparc_elf_hix22_reloc,"R_SPARC_GOTDATA_HIX22",false,0,0x003fffff, false), 293 HOWTO(R_SPARC_GOTDATA_LOX10,0,4,0,false,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_GOTDATA_LOX10",false,0,0x000003ff, false), 294 HOWTO(R_SPARC_GOTDATA_OP_HIX22,0,4,0,false,0,complain_overflow_bitfield,sparc_elf_hix22_reloc,"R_SPARC_GOTDATA_OP_HIX22",false,0,0x003fffff, false), 295 HOWTO(R_SPARC_GOTDATA_OP_LOX10,0,4,0,false,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_GOTDATA_OP_LOX10",false,0,0x000003ff, false), 296 HOWTO(R_SPARC_GOTDATA_OP,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOTDATA_OP",false,0,0x00000000,true), 297 HOWTO(R_SPARC_H34,12,4,22,false,0,complain_overflow_unsigned,bfd_elf_generic_reloc,"R_SPARC_H34",false,0,0x003fffff,false), 298 HOWTO(R_SPARC_SIZE32,0,4,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,"R_SPARC_SIZE32",false,0,0xffffffff,true), 299 HOWTO(R_SPARC_SIZE64,0,8,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,"R_SPARC_SIZE64",false,0,MINUS_ONE, true), 300 HOWTO(R_SPARC_WDISP10,2,4,10,true, 0,complain_overflow_signed,sparc_elf_wdisp10_reloc,"R_SPARC_WDISP10",false,0,0x00000000,true), 301}; 302static reloc_howto_type sparc_jmp_irel_howto = 303 HOWTO(R_SPARC_JMP_IREL, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_JMP_IREL",false,0,0x00000000,true); 304static reloc_howto_type sparc_irelative_howto = 305 HOWTO(R_SPARC_IRELATIVE, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_IRELATIVE",false,0,0x00000000,true); 306static reloc_howto_type sparc_vtinherit_howto = 307 HOWTO (R_SPARC_GNU_VTINHERIT, 0,4,0,false,0,complain_overflow_dont, NULL, "R_SPARC_GNU_VTINHERIT", false,0, 0, false); 308static reloc_howto_type sparc_vtentry_howto = 309 HOWTO (R_SPARC_GNU_VTENTRY, 0,4,0,false,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_SPARC_GNU_VTENTRY", false,0,0, false); 310static reloc_howto_type sparc_rev32_howto = 311 HOWTO(R_SPARC_REV32, 0,4,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_REV32", false,0,0xffffffff,true); 312 313reloc_howto_type * 314_bfd_sparc_elf_reloc_type_lookup (bfd *abfd, 315 bfd_reloc_code_real_type code) 316{ 317 /* We explicitly handle each relocation type in the switch 318 instead of using a lookup table for efficiency. */ 319 switch (code) 320 { 321 case BFD_RELOC_NONE: 322 return &_bfd_sparc_elf_howto_table[R_SPARC_NONE]; 323 324 case BFD_RELOC_8: 325 return &_bfd_sparc_elf_howto_table[R_SPARC_8]; 326 327 case BFD_RELOC_16: 328 return &_bfd_sparc_elf_howto_table[R_SPARC_16]; 329 330 case BFD_RELOC_32: 331 return &_bfd_sparc_elf_howto_table[R_SPARC_32]; 332 333 case BFD_RELOC_8_PCREL: 334 return &_bfd_sparc_elf_howto_table[R_SPARC_DISP8]; 335 336 case BFD_RELOC_16_PCREL: 337 return &_bfd_sparc_elf_howto_table[R_SPARC_DISP16]; 338 339 case BFD_RELOC_32_PCREL: 340 return &_bfd_sparc_elf_howto_table[R_SPARC_DISP32]; 341 342 case BFD_RELOC_32_PCREL_S2: 343 return &_bfd_sparc_elf_howto_table[R_SPARC_WDISP30]; 344 345 case BFD_RELOC_SPARC_WDISP22: 346 return &_bfd_sparc_elf_howto_table[R_SPARC_WDISP22]; 347 348 case BFD_RELOC_HI22: 349 return &_bfd_sparc_elf_howto_table[R_SPARC_HI22]; 350 351 case BFD_RELOC_SPARC22: 352 return &_bfd_sparc_elf_howto_table[R_SPARC_22]; 353 354 case BFD_RELOC_SPARC13: 355 return &_bfd_sparc_elf_howto_table[R_SPARC_13]; 356 357 case BFD_RELOC_LO10: 358 return &_bfd_sparc_elf_howto_table[R_SPARC_LO10]; 359 360 case BFD_RELOC_SPARC_GOT10: 361 return &_bfd_sparc_elf_howto_table[R_SPARC_GOT10]; 362 363 case BFD_RELOC_SPARC_GOT13: 364 return &_bfd_sparc_elf_howto_table[R_SPARC_GOT13]; 365 366 case BFD_RELOC_SPARC_GOT22: 367 return &_bfd_sparc_elf_howto_table[R_SPARC_GOT22]; 368 369 case BFD_RELOC_SPARC_PC10: 370 return &_bfd_sparc_elf_howto_table[R_SPARC_PC10]; 371 372 case BFD_RELOC_SPARC_PC22: 373 return &_bfd_sparc_elf_howto_table[R_SPARC_PC22]; 374 375 case BFD_RELOC_SPARC_WPLT30: 376 return &_bfd_sparc_elf_howto_table[R_SPARC_WPLT30]; 377 378 case BFD_RELOC_SPARC_COPY: 379 return &_bfd_sparc_elf_howto_table[R_SPARC_COPY]; 380 381 case BFD_RELOC_SPARC_GLOB_DAT: 382 return &_bfd_sparc_elf_howto_table[R_SPARC_GLOB_DAT]; 383 384 case BFD_RELOC_SPARC_JMP_SLOT: 385 return &_bfd_sparc_elf_howto_table[R_SPARC_JMP_SLOT]; 386 387 case BFD_RELOC_SPARC_RELATIVE: 388 return &_bfd_sparc_elf_howto_table[R_SPARC_RELATIVE]; 389 390 case BFD_RELOC_SPARC_UA32: 391 return &_bfd_sparc_elf_howto_table[R_SPARC_UA32]; 392 393 case BFD_RELOC_SPARC_PLT32: 394 return &_bfd_sparc_elf_howto_table[R_SPARC_PLT32]; 395 396 case BFD_RELOC_SPARC_10: 397 return &_bfd_sparc_elf_howto_table[R_SPARC_10]; 398 399 case BFD_RELOC_SPARC_11: 400 return &_bfd_sparc_elf_howto_table[R_SPARC_11]; 401 402 case BFD_RELOC_SPARC_64: 403 return &_bfd_sparc_elf_howto_table[R_SPARC_64]; 404 405 case BFD_RELOC_SPARC_OLO10: 406 return &_bfd_sparc_elf_howto_table[R_SPARC_OLO10]; 407 408 case BFD_RELOC_SPARC_HH22: 409 return &_bfd_sparc_elf_howto_table[R_SPARC_HH22]; 410 411 case BFD_RELOC_SPARC_HM10: 412 return &_bfd_sparc_elf_howto_table[R_SPARC_HM10]; 413 414 case BFD_RELOC_SPARC_LM22: 415 return &_bfd_sparc_elf_howto_table[R_SPARC_LM22]; 416 417 case BFD_RELOC_SPARC_PC_HH22: 418 return &_bfd_sparc_elf_howto_table[R_SPARC_PC_HH22]; 419 420 case BFD_RELOC_SPARC_PC_HM10: 421 return &_bfd_sparc_elf_howto_table[R_SPARC_PC_HM10]; 422 423 case BFD_RELOC_SPARC_PC_LM22: 424 return &_bfd_sparc_elf_howto_table[R_SPARC_PC_LM22]; 425 426 case BFD_RELOC_SPARC_WDISP16: 427 return &_bfd_sparc_elf_howto_table[R_SPARC_WDISP16]; 428 429 case BFD_RELOC_SPARC_WDISP19: 430 return &_bfd_sparc_elf_howto_table[R_SPARC_WDISP19]; 431 432 case BFD_RELOC_SPARC_7: 433 return &_bfd_sparc_elf_howto_table[R_SPARC_7]; 434 435 case BFD_RELOC_SPARC_5: 436 return &_bfd_sparc_elf_howto_table[R_SPARC_5]; 437 438 case BFD_RELOC_SPARC_6: 439 return &_bfd_sparc_elf_howto_table[R_SPARC_6]; 440 441 case BFD_RELOC_SPARC_DISP64: 442 return &_bfd_sparc_elf_howto_table[R_SPARC_DISP64]; 443 444 case BFD_RELOC_SPARC_PLT64: 445 return &_bfd_sparc_elf_howto_table[R_SPARC_PLT64]; 446 447 case BFD_RELOC_SPARC_HIX22: 448 return &_bfd_sparc_elf_howto_table[R_SPARC_HIX22]; 449 450 case BFD_RELOC_SPARC_LOX10: 451 return &_bfd_sparc_elf_howto_table[R_SPARC_LOX10]; 452 453 case BFD_RELOC_SPARC_H44: 454 return &_bfd_sparc_elf_howto_table[R_SPARC_H44]; 455 456 case BFD_RELOC_SPARC_M44: 457 return &_bfd_sparc_elf_howto_table[R_SPARC_M44]; 458 459 case BFD_RELOC_SPARC_L44: 460 return &_bfd_sparc_elf_howto_table[R_SPARC_L44]; 461 462 case BFD_RELOC_SPARC_REGISTER: 463 return &_bfd_sparc_elf_howto_table[R_SPARC_REGISTER]; 464 465 case BFD_RELOC_SPARC_UA64: 466 return &_bfd_sparc_elf_howto_table[R_SPARC_UA64]; 467 468 case BFD_RELOC_SPARC_UA16: 469 return &_bfd_sparc_elf_howto_table[R_SPARC_UA16]; 470 471 case BFD_RELOC_SPARC_TLS_GD_HI22: 472 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_GD_HI22]; 473 474 case BFD_RELOC_SPARC_TLS_GD_LO10: 475 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_GD_LO10]; 476 477 case BFD_RELOC_SPARC_TLS_GD_ADD: 478 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_GD_ADD]; 479 480 case BFD_RELOC_SPARC_TLS_GD_CALL: 481 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_GD_CALL]; 482 483 case BFD_RELOC_SPARC_TLS_LDM_HI22: 484 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDM_HI22]; 485 486 case BFD_RELOC_SPARC_TLS_LDM_LO10: 487 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDM_LO10]; 488 489 case BFD_RELOC_SPARC_TLS_LDM_ADD: 490 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDM_ADD]; 491 492 case BFD_RELOC_SPARC_TLS_LDM_CALL: 493 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDM_CALL]; 494 495 case BFD_RELOC_SPARC_TLS_LDO_HIX22: 496 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDO_HIX22]; 497 498 case BFD_RELOC_SPARC_TLS_LDO_LOX10: 499 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDO_LOX10]; 500 501 case BFD_RELOC_SPARC_TLS_LDO_ADD: 502 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDO_ADD]; 503 504 case BFD_RELOC_SPARC_TLS_IE_HI22: 505 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_IE_HI22]; 506 507 case BFD_RELOC_SPARC_TLS_IE_LO10: 508 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_IE_LO10]; 509 510 case BFD_RELOC_SPARC_TLS_IE_LD: 511 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_IE_LD]; 512 513 case BFD_RELOC_SPARC_TLS_IE_LDX: 514 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_IE_LDX]; 515 516 case BFD_RELOC_SPARC_TLS_IE_ADD: 517 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_IE_ADD]; 518 519 case BFD_RELOC_SPARC_TLS_LE_HIX22: 520 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LE_HIX22]; 521 522 case BFD_RELOC_SPARC_TLS_LE_LOX10: 523 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LE_LOX10]; 524 525 case BFD_RELOC_SPARC_TLS_DTPMOD32: 526 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_DTPMOD32]; 527 528 case BFD_RELOC_SPARC_TLS_DTPMOD64: 529 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_DTPMOD64]; 530 531 case BFD_RELOC_SPARC_TLS_DTPOFF32: 532 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_DTPOFF32]; 533 534 case BFD_RELOC_SPARC_TLS_DTPOFF64: 535 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_DTPOFF64]; 536 537 case BFD_RELOC_SPARC_TLS_TPOFF32: 538 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_TPOFF32]; 539 540 case BFD_RELOC_SPARC_TLS_TPOFF64: 541 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_TPOFF64]; 542 543 case BFD_RELOC_SPARC_GOTDATA_HIX22: 544 return &_bfd_sparc_elf_howto_table[R_SPARC_GOTDATA_HIX22]; 545 546 case BFD_RELOC_SPARC_GOTDATA_LOX10: 547 return &_bfd_sparc_elf_howto_table[R_SPARC_GOTDATA_LOX10]; 548 549 case BFD_RELOC_SPARC_GOTDATA_OP_HIX22: 550 return &_bfd_sparc_elf_howto_table[R_SPARC_GOTDATA_OP_HIX22]; 551 552 case BFD_RELOC_SPARC_GOTDATA_OP_LOX10: 553 return &_bfd_sparc_elf_howto_table[R_SPARC_GOTDATA_OP_LOX10]; 554 555 case BFD_RELOC_SPARC_GOTDATA_OP: 556 return &_bfd_sparc_elf_howto_table[R_SPARC_GOTDATA_OP]; 557 558 case BFD_RELOC_SPARC_H34: 559 return &_bfd_sparc_elf_howto_table[R_SPARC_H34]; 560 561 case BFD_RELOC_SPARC_SIZE32: 562 return &_bfd_sparc_elf_howto_table[R_SPARC_SIZE32]; 563 564 case BFD_RELOC_SPARC_SIZE64: 565 return &_bfd_sparc_elf_howto_table[R_SPARC_SIZE64]; 566 567 case BFD_RELOC_SPARC_WDISP10: 568 return &_bfd_sparc_elf_howto_table[R_SPARC_WDISP10]; 569 570 case BFD_RELOC_SPARC_JMP_IREL: 571 return &sparc_jmp_irel_howto; 572 573 case BFD_RELOC_SPARC_IRELATIVE: 574 return &sparc_irelative_howto; 575 576 case BFD_RELOC_VTABLE_INHERIT: 577 return &sparc_vtinherit_howto; 578 579 case BFD_RELOC_VTABLE_ENTRY: 580 return &sparc_vtentry_howto; 581 582 case BFD_RELOC_SPARC_REV32: 583 return &sparc_rev32_howto; 584 585 default: 586 break; 587 } 588 /* xgettext:c-format */ 589 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code); 590 bfd_set_error (bfd_error_bad_value); 591 return NULL; 592} 593 594reloc_howto_type * 595_bfd_sparc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 596 const char *r_name) 597{ 598 unsigned int i; 599 600 for (i = 0; i < ARRAY_SIZE (_bfd_sparc_elf_howto_table); i++) 601 if (_bfd_sparc_elf_howto_table[i].name != NULL 602 && strcasecmp (_bfd_sparc_elf_howto_table[i].name, r_name) == 0) 603 return &_bfd_sparc_elf_howto_table[i]; 604 605 if (strcasecmp (sparc_vtinherit_howto.name, r_name) == 0) 606 return &sparc_vtinherit_howto; 607 if (strcasecmp (sparc_vtentry_howto.name, r_name) == 0) 608 return &sparc_vtentry_howto; 609 if (strcasecmp (sparc_rev32_howto.name, r_name) == 0) 610 return &sparc_rev32_howto; 611 612 return NULL; 613} 614 615reloc_howto_type * 616_bfd_sparc_elf_info_to_howto_ptr (bfd *abfd ATTRIBUTE_UNUSED, 617 unsigned int r_type) 618{ 619 switch (r_type) 620 { 621 case R_SPARC_JMP_IREL: 622 return &sparc_jmp_irel_howto; 623 624 case R_SPARC_IRELATIVE: 625 return &sparc_irelative_howto; 626 627 case R_SPARC_GNU_VTINHERIT: 628 return &sparc_vtinherit_howto; 629 630 case R_SPARC_GNU_VTENTRY: 631 return &sparc_vtentry_howto; 632 633 case R_SPARC_REV32: 634 return &sparc_rev32_howto; 635 636 default: 637 if (r_type >= (unsigned int) R_SPARC_max_std) 638 { 639 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 640 abfd, r_type); 641 bfd_set_error (bfd_error_bad_value); 642 return NULL; 643 } 644 return &_bfd_sparc_elf_howto_table[r_type]; 645 } 646} 647 648/* Both 32-bit and 64-bit sparc encode this in an identical manner, 649 so just take advantage of that. */ 650#define SPARC_ELF_R_TYPE(r_info) \ 651 ((r_info) & 0xff) 652 653bool 654_bfd_sparc_elf_info_to_howto (bfd *abfd, arelent *cache_ptr, 655 Elf_Internal_Rela *dst) 656{ 657 unsigned int r_type = SPARC_ELF_R_TYPE (dst->r_info); 658 659 if ((cache_ptr->howto = _bfd_sparc_elf_info_to_howto_ptr (abfd, r_type)) == NULL) 660 { 661 bfd_set_error (bfd_error_bad_value); 662 return false; 663 } 664 return true; 665} 666 667 668/* The nop opcode we use. */ 669#define SPARC_NOP 0x01000000 670 671#define SPARC_INSN_BYTES 4 672 673/* Is an undefined weak symbol resolved to 0 ? 674 Reference to an undefined weak symbol is resolved to 0 when 675 building an executable if it isn't dynamic and 676 1. Has non-GOT/non-PLT relocations in text section. 677 Or 678 2. Has no GOT/PLT relocation. */ 679#define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, EH) \ 680 ((EH)->elf.root.type == bfd_link_hash_undefweak \ 681 && bfd_link_executable (INFO) \ 682 && (_bfd_sparc_elf_hash_table (INFO)->interp == NULL \ 683 || !(INFO)->dynamic_undefined_weak \ 684 || (EH)->has_non_got_reloc \ 685 || !(EH)->has_got_reloc)) 686 687/* SPARC ELF linker hash entry. */ 688 689struct _bfd_sparc_elf_link_hash_entry 690{ 691 struct elf_link_hash_entry elf; 692 693#define GOT_UNKNOWN 0 694#define GOT_NORMAL 1 695#define GOT_TLS_GD 2 696#define GOT_TLS_IE 3 697 unsigned char tls_type; 698 699 /* Symbol has GOT or PLT relocations. */ 700 unsigned int has_got_reloc : 1; 701 702 /* Symbol has old-style, non-relaxable GOT relocations. */ 703 unsigned int has_old_style_got_reloc : 1; 704 705 /* Symbol has non-GOT/non-PLT relocations in text sections. */ 706 unsigned int has_non_got_reloc : 1; 707 708}; 709 710#define _bfd_sparc_elf_hash_entry(ent) ((struct _bfd_sparc_elf_link_hash_entry *)(ent)) 711 712struct _bfd_sparc_elf_obj_tdata 713{ 714 struct elf_obj_tdata root; 715 716 /* tls_type for each local got entry. */ 717 char *local_got_tls_type; 718 719 /* TRUE if TLS GD relocs has been seen for this object. */ 720 bool has_tlsgd; 721}; 722 723#define _bfd_sparc_elf_tdata(abfd) \ 724 ((struct _bfd_sparc_elf_obj_tdata *) (abfd)->tdata.any) 725 726#define _bfd_sparc_elf_local_got_tls_type(abfd) \ 727 (_bfd_sparc_elf_tdata (abfd)->local_got_tls_type) 728 729#define is_sparc_elf(bfd) \ 730 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 731 && elf_tdata (bfd) != NULL \ 732 && elf_object_id (bfd) == SPARC_ELF_DATA) 733 734bool 735_bfd_sparc_elf_mkobject (bfd *abfd) 736{ 737 return bfd_elf_allocate_object (abfd, sizeof (struct _bfd_sparc_elf_obj_tdata), 738 SPARC_ELF_DATA); 739} 740 741static void 742sparc_put_word_32 (bfd *abfd, bfd_vma val, void *ptr) 743{ 744 bfd_put_32 (abfd, val, ptr); 745} 746 747static void 748sparc_put_word_64 (bfd *abfd, bfd_vma val, void *ptr) 749{ 750 bfd_put_64 (abfd, val, ptr); 751} 752 753static void 754sparc_elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel) 755{ 756 const struct elf_backend_data *bed; 757 bfd_byte *loc; 758 759 bed = get_elf_backend_data (abfd); 760 BFD_ASSERT (s->reloc_count * bed->s->sizeof_rela < s->size); 761 loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela); 762 bed->s->swap_reloca_out (abfd, rel, loc); 763} 764 765static bfd_vma 766sparc_elf_r_info_64 (Elf_Internal_Rela *in_rel ATTRIBUTE_UNUSED, 767 bfd_vma rel_index ATTRIBUTE_UNUSED, 768 bfd_vma type ATTRIBUTE_UNUSED) 769{ 770 return ELF64_R_INFO (rel_index, 771 (in_rel ? 772 ELF64_R_TYPE_INFO (ELF64_R_TYPE_DATA (in_rel->r_info), 773 type) : type)); 774} 775 776static bfd_vma 777sparc_elf_r_info_32 (Elf_Internal_Rela *in_rel ATTRIBUTE_UNUSED, 778 bfd_vma rel_index, bfd_vma type) 779{ 780 return ELF32_R_INFO (rel_index, type); 781} 782 783static bfd_vma 784sparc_elf_r_symndx_64 (bfd_vma r_info) 785{ 786 bfd_vma r_symndx = ELF32_R_SYM (r_info); 787 return (r_symndx >> 24); 788} 789 790static bfd_vma 791sparc_elf_r_symndx_32 (bfd_vma r_info) 792{ 793 return ELF32_R_SYM (r_info); 794} 795 796/* PLT/GOT stuff */ 797 798#define PLT32_ENTRY_SIZE 12 799#define PLT32_HEADER_SIZE (4 * PLT32_ENTRY_SIZE) 800 801/* The first four entries in a 32-bit procedure linkage table are reserved, 802 and the initial contents are unimportant (we zero them out). 803 Subsequent entries look like this. See the SVR4 ABI SPARC 804 supplement to see how this works. */ 805 806/* sethi %hi(.-.plt0),%g1. We fill in the address later. */ 807#define PLT32_ENTRY_WORD0 0x03000000 808/* b,a .plt0. We fill in the offset later. */ 809#define PLT32_ENTRY_WORD1 0x30800000 810/* nop. */ 811#define PLT32_ENTRY_WORD2 SPARC_NOP 812 813static int 814sparc32_plt_entry_build (bfd *output_bfd, asection *splt, bfd_vma offset, 815 bfd_vma max ATTRIBUTE_UNUSED, 816 bfd_vma *r_offset) 817{ 818 bfd_put_32 (output_bfd, 819 PLT32_ENTRY_WORD0 + offset, 820 splt->contents + offset); 821 bfd_put_32 (output_bfd, 822 (PLT32_ENTRY_WORD1 823 + (((- (offset + 4)) >> 2) & 0x3fffff)), 824 splt->contents + offset + 4); 825 bfd_put_32 (output_bfd, (bfd_vma) PLT32_ENTRY_WORD2, 826 splt->contents + offset + 8); 827 828 *r_offset = offset; 829 830 return offset / PLT32_ENTRY_SIZE - 4; 831} 832 833/* Both the headers and the entries are icache aligned. */ 834#define PLT64_ENTRY_SIZE 32 835#define PLT64_HEADER_SIZE (4 * PLT64_ENTRY_SIZE) 836#define PLT64_LARGE_THRESHOLD 32768 837 838static int 839sparc64_plt_entry_build (bfd *output_bfd, asection *splt, bfd_vma offset, 840 bfd_vma max, bfd_vma *r_offset) 841{ 842 unsigned char *entry = splt->contents + offset; 843 const unsigned int nop = SPARC_NOP; 844 int plt_index; 845 846 if (offset < (PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE)) 847 { 848 unsigned int sethi, ba; 849 850 *r_offset = offset; 851 852 plt_index = (offset / PLT64_ENTRY_SIZE); 853 854 sethi = 0x03000000 | (plt_index * PLT64_ENTRY_SIZE); 855 ba = 0x30680000 856 | (((splt->contents + PLT64_ENTRY_SIZE) - (entry + 4)) / 4 & 0x7ffff); 857 858 bfd_put_32 (output_bfd, (bfd_vma) sethi, entry); 859 bfd_put_32 (output_bfd, (bfd_vma) ba, entry + 4); 860 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 8); 861 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 12); 862 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 16); 863 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 20); 864 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 24); 865 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 28); 866 } 867 else 868 { 869 unsigned char *ptr; 870 unsigned int ldx; 871 int block, last_block, ofs, last_ofs, chunks_this_block; 872 const int insn_chunk_size = (6 * 4); 873 const int ptr_chunk_size = (1 * 8); 874 const int entries_per_block = 160; 875 const int block_size = entries_per_block * (insn_chunk_size 876 + ptr_chunk_size); 877 878 /* Entries 32768 and higher are grouped into blocks of 160. 879 The blocks are further subdivided into 160 sequences of 880 6 instructions and 160 pointers. If a block does not require 881 the full 160 entries, let's say it requires N, then there 882 will be N sequences of 6 instructions and N pointers. */ 883 884 offset -= (PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE); 885 max -= (PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE); 886 887 block = offset / block_size; 888 last_block = max / block_size; 889 if (block != last_block) 890 { 891 chunks_this_block = 160; 892 } 893 else 894 { 895 last_ofs = max % block_size; 896 chunks_this_block = last_ofs / (insn_chunk_size + ptr_chunk_size); 897 } 898 899 ofs = offset % block_size; 900 901 plt_index = (PLT64_LARGE_THRESHOLD + 902 (block * 160) + 903 (ofs / insn_chunk_size)); 904 905 ptr = splt->contents 906 + (PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE) 907 + (block * block_size) 908 + (chunks_this_block * insn_chunk_size) 909 + (ofs / insn_chunk_size) * ptr_chunk_size; 910 911 *r_offset = (bfd_vma) (ptr - splt->contents); 912 913 ldx = 0xc25be000 | ((ptr - (entry+4)) & 0x1fff); 914 915 /* mov %o7,%g5 916 call .+8 917 nop 918 ldx [%o7+P],%g1 919 jmpl %o7+%g1,%g1 920 mov %g5,%o7 */ 921 bfd_put_32 (output_bfd, (bfd_vma) 0x8a10000f, entry); 922 bfd_put_32 (output_bfd, (bfd_vma) 0x40000002, entry + 4); 923 bfd_put_32 (output_bfd, (bfd_vma) SPARC_NOP, entry + 8); 924 bfd_put_32 (output_bfd, (bfd_vma) ldx, entry + 12); 925 bfd_put_32 (output_bfd, (bfd_vma) 0x83c3c001, entry + 16); 926 bfd_put_32 (output_bfd, (bfd_vma) 0x9e100005, entry + 20); 927 928 bfd_put_64 (output_bfd, (bfd_vma) (splt->contents - (entry + 4)), ptr); 929 } 930 931 return plt_index - 4; 932} 933 934/* The format of the first PLT entry in a VxWorks executable. */ 935static const bfd_vma sparc_vxworks_exec_plt0_entry[] = 936 { 937 0x05000000, /* sethi %hi(_GLOBAL_OFFSET_TABLE_+8), %g2 */ 938 0x8410a000, /* or %g2, %lo(_GLOBAL_OFFSET_TABLE_+8), %g2 */ 939 0xc4008000, /* ld [ %g2 ], %g2 */ 940 0x81c08000, /* jmp %g2 */ 941 0x01000000 /* nop */ 942 }; 943 944/* The format of subsequent PLT entries. */ 945static const bfd_vma sparc_vxworks_exec_plt_entry[] = 946 { 947 0x03000000, /* sethi %hi(_GLOBAL_OFFSET_TABLE_+f@got), %g1 */ 948 0x82106000, /* or %g1, %lo(_GLOBAL_OFFSET_TABLE_+f@got), %g1 */ 949 0xc2004000, /* ld [ %g1 ], %g1 */ 950 0x81c04000, /* jmp %g1 */ 951 0x01000000, /* nop */ 952 0x03000000, /* sethi %hi(f@pltindex), %g1 */ 953 0x10800000, /* b _PLT_resolve */ 954 0x82106000 /* or %g1, %lo(f@pltindex), %g1 */ 955 }; 956 957/* The format of the first PLT entry in a VxWorks shared object. */ 958static const bfd_vma sparc_vxworks_shared_plt0_entry[] = 959 { 960 0xc405e008, /* ld [ %l7 + 8 ], %g2 */ 961 0x81c08000, /* jmp %g2 */ 962 0x01000000 /* nop */ 963 }; 964 965/* The format of subsequent PLT entries. */ 966static const bfd_vma sparc_vxworks_shared_plt_entry[] = 967 { 968 0x03000000, /* sethi %hi(f@got), %g1 */ 969 0x82106000, /* or %g1, %lo(f@got), %g1 */ 970 0xc205c001, /* ld [ %l7 + %g1 ], %g1 */ 971 0x81c04000, /* jmp %g1 */ 972 0x01000000, /* nop */ 973 0x03000000, /* sethi %hi(f@pltindex), %g1 */ 974 0x10800000, /* b _PLT_resolve */ 975 0x82106000 /* or %g1, %lo(f@pltindex), %g1 */ 976 }; 977 978#define SPARC_ELF_PUT_WORD(htab, bfd, val, ptr) \ 979 htab->put_word(bfd, val, ptr) 980 981#define SPARC_ELF_R_INFO(htab, in_rel, index, type) \ 982 htab->r_info(in_rel, index, type) 983 984#define SPARC_ELF_R_SYMNDX(htab, r_info) \ 985 htab->r_symndx(r_info) 986 987#define SPARC_ELF_WORD_BYTES(htab) \ 988 htab->bytes_per_word 989 990#define SPARC_ELF_RELA_BYTES(htab) \ 991 htab->bytes_per_rela 992 993#define SPARC_ELF_DTPOFF_RELOC(htab) \ 994 htab->dtpoff_reloc 995 996#define SPARC_ELF_DTPMOD_RELOC(htab) \ 997 htab->dtpmod_reloc 998 999#define SPARC_ELF_TPOFF_RELOC(htab) \ 1000 htab->tpoff_reloc 1001 1002#define SPARC_ELF_BUILD_PLT_ENTRY(htab, obfd, splt, off, max, r_off) \ 1003 htab->build_plt_entry (obfd, splt, off, max, r_off) 1004 1005/* Create an entry in an SPARC ELF linker hash table. */ 1006 1007static struct bfd_hash_entry * 1008link_hash_newfunc (struct bfd_hash_entry *entry, 1009 struct bfd_hash_table *table, const char *string) 1010{ 1011 /* Allocate the structure if it has not already been allocated by a 1012 subclass. */ 1013 if (entry == NULL) 1014 { 1015 entry = bfd_hash_allocate (table, 1016 sizeof (struct _bfd_sparc_elf_link_hash_entry)); 1017 if (entry == NULL) 1018 return entry; 1019 } 1020 1021 /* Call the allocation method of the superclass. */ 1022 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 1023 if (entry != NULL) 1024 { 1025 struct _bfd_sparc_elf_link_hash_entry *eh; 1026 1027 eh = (struct _bfd_sparc_elf_link_hash_entry *) entry; 1028 eh->tls_type = GOT_UNKNOWN; 1029 eh->has_got_reloc = 0; 1030 eh->has_non_got_reloc = 0; 1031 } 1032 1033 return entry; 1034} 1035 1036/* The name of the dynamic interpreter. This is put in the .interp 1037 section. */ 1038 1039#define ELF32_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 1040#define ELF64_DYNAMIC_INTERPRETER "/usr/lib/sparcv9/ld.so.1" 1041 1042/* Compute a hash of a local hash entry. We use elf_link_hash_entry 1043 for local symbol so that we can handle local STT_GNU_IFUNC symbols 1044 as global symbol. We reuse indx and dynstr_index for local symbol 1045 hash since they aren't used by global symbols in this backend. */ 1046 1047static hashval_t 1048elf_sparc_local_htab_hash (const void *ptr) 1049{ 1050 struct elf_link_hash_entry *h 1051 = (struct elf_link_hash_entry *) ptr; 1052 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); 1053} 1054 1055/* Compare local hash entries. */ 1056 1057static int 1058elf_sparc_local_htab_eq (const void *ptr1, const void *ptr2) 1059{ 1060 struct elf_link_hash_entry *h1 1061 = (struct elf_link_hash_entry *) ptr1; 1062 struct elf_link_hash_entry *h2 1063 = (struct elf_link_hash_entry *) ptr2; 1064 1065 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; 1066} 1067 1068/* Find and/or create a hash entry for local symbol. */ 1069 1070static struct elf_link_hash_entry * 1071elf_sparc_get_local_sym_hash (struct _bfd_sparc_elf_link_hash_table *htab, 1072 bfd *abfd, const Elf_Internal_Rela *rel, 1073 bool create) 1074{ 1075 struct _bfd_sparc_elf_link_hash_entry e, *ret; 1076 asection *sec = abfd->sections; 1077 unsigned long r_symndx; 1078 hashval_t h; 1079 void **slot; 1080 1081 r_symndx = SPARC_ELF_R_SYMNDX (htab, rel->r_info); 1082 h = ELF_LOCAL_SYMBOL_HASH (sec->id, r_symndx); 1083 1084 e.elf.indx = sec->id; 1085 e.elf.dynstr_index = r_symndx; 1086 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, 1087 create ? INSERT : NO_INSERT); 1088 1089 if (!slot) 1090 return NULL; 1091 1092 if (*slot) 1093 { 1094 ret = (struct _bfd_sparc_elf_link_hash_entry *) *slot; 1095 return &ret->elf; 1096 } 1097 1098 ret = (struct _bfd_sparc_elf_link_hash_entry *) 1099 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, 1100 sizeof (struct _bfd_sparc_elf_link_hash_entry)); 1101 if (ret) 1102 { 1103 memset (ret, 0, sizeof (*ret)); 1104 ret->elf.indx = sec->id; 1105 ret->elf.dynstr_index = r_symndx; 1106 ret->elf.dynindx = -1; 1107 ret->elf.plt.offset = (bfd_vma) -1; 1108 ret->elf.got.offset = (bfd_vma) -1; 1109 *slot = ret; 1110 } 1111 return &ret->elf; 1112} 1113 1114/* Destroy a SPARC ELF linker hash table. */ 1115 1116static void 1117_bfd_sparc_elf_link_hash_table_free (bfd *obfd) 1118{ 1119 struct _bfd_sparc_elf_link_hash_table *htab 1120 = (struct _bfd_sparc_elf_link_hash_table *) obfd->link.hash; 1121 1122 if (htab->loc_hash_table) 1123 htab_delete (htab->loc_hash_table); 1124 if (htab->loc_hash_memory) 1125 objalloc_free ((struct objalloc *) htab->loc_hash_memory); 1126 _bfd_elf_link_hash_table_free (obfd); 1127} 1128 1129/* Create a SPARC ELF linker hash table. */ 1130 1131struct bfd_link_hash_table * 1132_bfd_sparc_elf_link_hash_table_create (bfd *abfd) 1133{ 1134 struct _bfd_sparc_elf_link_hash_table *ret; 1135 size_t amt = sizeof (struct _bfd_sparc_elf_link_hash_table); 1136 1137 ret = (struct _bfd_sparc_elf_link_hash_table *) bfd_zmalloc (amt); 1138 if (ret == NULL) 1139 return NULL; 1140 1141 if (ABI_64_P (abfd)) 1142 { 1143 ret->put_word = sparc_put_word_64; 1144 ret->r_info = sparc_elf_r_info_64; 1145 ret->r_symndx = sparc_elf_r_symndx_64; 1146 ret->dtpoff_reloc = R_SPARC_TLS_DTPOFF64; 1147 ret->dtpmod_reloc = R_SPARC_TLS_DTPMOD64; 1148 ret->tpoff_reloc = R_SPARC_TLS_TPOFF64; 1149 ret->word_align_power = 3; 1150 ret->align_power_max = 4; 1151 ret->bytes_per_word = 8; 1152 ret->bytes_per_rela = sizeof (Elf64_External_Rela); 1153 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; 1154 ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; 1155 1156 ret->build_plt_entry = sparc64_plt_entry_build; 1157 ret->plt_header_size = PLT64_HEADER_SIZE; 1158 ret->plt_entry_size = PLT64_ENTRY_SIZE; 1159 } 1160 else 1161 { 1162 ret->put_word = sparc_put_word_32; 1163 ret->r_info = sparc_elf_r_info_32; 1164 ret->r_symndx = sparc_elf_r_symndx_32; 1165 ret->dtpoff_reloc = R_SPARC_TLS_DTPOFF32; 1166 ret->dtpmod_reloc = R_SPARC_TLS_DTPMOD32; 1167 ret->tpoff_reloc = R_SPARC_TLS_TPOFF32; 1168 ret->word_align_power = 2; 1169 ret->align_power_max = 3; 1170 ret->bytes_per_word = 4; 1171 ret->bytes_per_rela = sizeof (Elf32_External_Rela); 1172 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; 1173 ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER; 1174 1175 ret->build_plt_entry = sparc32_plt_entry_build; 1176 ret->plt_header_size = PLT32_HEADER_SIZE; 1177 ret->plt_entry_size = PLT32_ENTRY_SIZE; 1178 } 1179 1180 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, 1181 sizeof (struct _bfd_sparc_elf_link_hash_entry), 1182 SPARC_ELF_DATA)) 1183 { 1184 free (ret); 1185 return NULL; 1186 } 1187 1188 ret->loc_hash_table = htab_try_create (1024, 1189 elf_sparc_local_htab_hash, 1190 elf_sparc_local_htab_eq, 1191 NULL); 1192 ret->loc_hash_memory = objalloc_create (); 1193 if (!ret->loc_hash_table || !ret->loc_hash_memory) 1194 { 1195 _bfd_sparc_elf_link_hash_table_free (abfd); 1196 return NULL; 1197 } 1198 ret->elf.root.hash_table_free = _bfd_sparc_elf_link_hash_table_free; 1199 1200 return &ret->elf.root; 1201} 1202 1203/* Create .plt, .rela.plt, .got, .rela.got, .dynbss, and 1204 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our 1205 hash table. */ 1206 1207bool 1208_bfd_sparc_elf_create_dynamic_sections (bfd *dynobj, 1209 struct bfd_link_info *info) 1210{ 1211 struct _bfd_sparc_elf_link_hash_table *htab; 1212 1213 htab = _bfd_sparc_elf_hash_table (info); 1214 BFD_ASSERT (htab != NULL); 1215 1216 if (!_bfd_elf_create_dynamic_sections (dynobj, info)) 1217 return false; 1218 1219 if (htab->elf.target_os == is_vxworks) 1220 { 1221 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2)) 1222 return false; 1223 if (bfd_link_pic (info)) 1224 { 1225 htab->plt_header_size 1226 = 4 * ARRAY_SIZE (sparc_vxworks_shared_plt0_entry); 1227 htab->plt_entry_size 1228 = 4 * ARRAY_SIZE (sparc_vxworks_shared_plt_entry); 1229 } 1230 else 1231 { 1232 htab->plt_header_size 1233 = 4 * ARRAY_SIZE (sparc_vxworks_exec_plt0_entry); 1234 htab->plt_entry_size 1235 = 4 * ARRAY_SIZE (sparc_vxworks_exec_plt_entry); 1236 } 1237 } 1238 1239 if (!htab->elf.splt || !htab->elf.srelplt || !htab->elf.sdynbss 1240 || (!bfd_link_pic (info) && !htab->elf.srelbss)) 1241 abort (); 1242 1243 return true; 1244} 1245 1246static bool 1247create_ifunc_sections (bfd *abfd, struct bfd_link_info *info) 1248{ 1249 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 1250 struct elf_link_hash_table *htab = elf_hash_table (info); 1251 flagword flags, pltflags; 1252 asection *s; 1253 1254 if (htab->irelifunc != NULL || htab->iplt != NULL) 1255 return true; 1256 1257 flags = bed->dynamic_sec_flags; 1258 pltflags = flags | SEC_ALLOC | SEC_CODE | SEC_LOAD; 1259 1260 s = bfd_make_section_with_flags (abfd, ".iplt", pltflags); 1261 if (s == NULL 1262 || !bfd_set_section_alignment (s, bed->plt_alignment)) 1263 return false; 1264 htab->iplt = s; 1265 1266 s = bfd_make_section_with_flags (abfd, ".rela.iplt", 1267 flags | SEC_READONLY); 1268 if (s == NULL 1269 || !bfd_set_section_alignment (s, bed->s->log_file_align)) 1270 return false; 1271 htab->irelplt = s; 1272 1273 return true; 1274} 1275 1276/* Copy the extra info we tack onto an elf_link_hash_entry. */ 1277 1278void 1279_bfd_sparc_elf_copy_indirect_symbol (struct bfd_link_info *info, 1280 struct elf_link_hash_entry *dir, 1281 struct elf_link_hash_entry *ind) 1282{ 1283 struct _bfd_sparc_elf_link_hash_entry *edir, *eind; 1284 1285 edir = (struct _bfd_sparc_elf_link_hash_entry *) dir; 1286 eind = (struct _bfd_sparc_elf_link_hash_entry *) ind; 1287 1288 if (ind->root.type == bfd_link_hash_indirect && dir->got.refcount <= 0) 1289 { 1290 edir->tls_type = eind->tls_type; 1291 eind->tls_type = GOT_UNKNOWN; 1292 } 1293 1294 /* Copy has_got_reloc and has_non_got_reloc. */ 1295 edir->has_got_reloc |= eind->has_got_reloc; 1296 edir->has_non_got_reloc |= eind->has_non_got_reloc; 1297 1298 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 1299} 1300 1301static int 1302sparc_elf_tls_transition (struct bfd_link_info *info, bfd *abfd, 1303 int r_type, int is_local) 1304{ 1305 if (! ABI_64_P (abfd) 1306 && r_type == R_SPARC_TLS_GD_HI22 1307 && ! _bfd_sparc_elf_tdata (abfd)->has_tlsgd) 1308 return R_SPARC_REV32; 1309 1310 if (!bfd_link_executable (info)) 1311 return r_type; 1312 1313 switch (r_type) 1314 { 1315 case R_SPARC_TLS_GD_HI22: 1316 return is_local ? R_SPARC_TLS_LE_HIX22 : R_SPARC_TLS_IE_HI22; 1317 case R_SPARC_TLS_GD_LO10: 1318 return is_local ? R_SPARC_TLS_LE_LOX10 : R_SPARC_TLS_IE_LO10; 1319 case R_SPARC_TLS_LDM_HI22: 1320 return R_SPARC_TLS_LE_HIX22; 1321 case R_SPARC_TLS_LDM_LO10: 1322 return R_SPARC_TLS_LE_LOX10; 1323 case R_SPARC_TLS_IE_HI22: 1324 return is_local ? R_SPARC_TLS_LE_HIX22 : r_type; 1325 case R_SPARC_TLS_IE_LO10: 1326 return is_local ? R_SPARC_TLS_LE_LOX10 : r_type; 1327 } 1328 1329 return r_type; 1330} 1331 1332/* Look through the relocs for a section during the first phase, and 1333 allocate space in the global offset table or procedure linkage 1334 table. */ 1335 1336bool 1337_bfd_sparc_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, 1338 asection *sec, const Elf_Internal_Rela *relocs) 1339{ 1340 struct _bfd_sparc_elf_link_hash_table *htab; 1341 Elf_Internal_Shdr *symtab_hdr; 1342 struct elf_link_hash_entry **sym_hashes; 1343 const Elf_Internal_Rela *rel; 1344 const Elf_Internal_Rela *rel_end; 1345 asection *sreloc; 1346 int num_relocs; 1347 bool checked_tlsgd = false; 1348 1349 if (bfd_link_relocatable (info)) 1350 return true; 1351 1352 htab = _bfd_sparc_elf_hash_table (info); 1353 BFD_ASSERT (htab != NULL); 1354 symtab_hdr = &elf_symtab_hdr (abfd); 1355 sym_hashes = elf_sym_hashes (abfd); 1356 1357 sreloc = NULL; 1358 1359 if (ABI_64_P (abfd)) 1360 num_relocs = NUM_SHDR_ENTRIES (_bfd_elf_single_rel_hdr (sec)); 1361 else 1362 num_relocs = sec->reloc_count; 1363 1364 BFD_ASSERT (is_sparc_elf (abfd) || num_relocs == 0); 1365 1366 if (htab->elf.dynobj == NULL) 1367 htab->elf.dynobj = abfd; 1368 if (!create_ifunc_sections (htab->elf.dynobj, info)) 1369 return false; 1370 1371 rel_end = relocs + num_relocs; 1372 for (rel = relocs; rel < rel_end; rel++) 1373 { 1374 unsigned int r_type; 1375 unsigned int r_symndx; 1376 struct elf_link_hash_entry *h; 1377 struct _bfd_sparc_elf_link_hash_entry *eh; 1378 Elf_Internal_Sym *isym; 1379 1380 r_symndx = SPARC_ELF_R_SYMNDX (htab, rel->r_info); 1381 r_type = SPARC_ELF_R_TYPE (rel->r_info); 1382 1383 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) 1384 { 1385 /* xgettext:c-format */ 1386 _bfd_error_handler (_("%pB: bad symbol index: %d"), abfd, r_symndx); 1387 return false; 1388 } 1389 1390 isym = NULL; 1391 if (r_symndx < symtab_hdr->sh_info) 1392 { 1393 /* A local symbol. */ 1394 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, abfd, 1395 r_symndx); 1396 if (isym == NULL) 1397 return false; 1398 1399 /* Check relocation against local STT_GNU_IFUNC symbol. */ 1400 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 1401 { 1402 h = elf_sparc_get_local_sym_hash (htab, abfd, rel, true); 1403 if (h == NULL) 1404 return false; 1405 1406 /* Fake a STT_GNU_IFUNC symbol. */ 1407 h->type = STT_GNU_IFUNC; 1408 h->def_regular = 1; 1409 h->ref_regular = 1; 1410 h->forced_local = 1; 1411 h->root.type = bfd_link_hash_defined; 1412 } 1413 else 1414 h = NULL; 1415 } 1416 else 1417 { 1418 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1419 while (h->root.type == bfd_link_hash_indirect 1420 || h->root.type == bfd_link_hash_warning) 1421 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1422 } 1423 1424 if (h && h->type == STT_GNU_IFUNC && h->def_regular) 1425 { 1426 h->ref_regular = 1; 1427 h->plt.refcount += 1; 1428 } 1429 1430 /* Compatibility with old R_SPARC_REV32 reloc conflicting 1431 with R_SPARC_TLS_GD_HI22. */ 1432 if (! ABI_64_P (abfd) && ! checked_tlsgd) 1433 switch (r_type) 1434 { 1435 case R_SPARC_TLS_GD_HI22: 1436 { 1437 const Elf_Internal_Rela *relt; 1438 1439 for (relt = rel + 1; relt < rel_end; relt++) 1440 if (ELF32_R_TYPE (relt->r_info) == R_SPARC_TLS_GD_LO10 1441 || ELF32_R_TYPE (relt->r_info) == R_SPARC_TLS_GD_ADD 1442 || ELF32_R_TYPE (relt->r_info) == R_SPARC_TLS_GD_CALL) 1443 break; 1444 checked_tlsgd = true; 1445 _bfd_sparc_elf_tdata (abfd)->has_tlsgd = relt < rel_end; 1446 } 1447 break; 1448 case R_SPARC_TLS_GD_LO10: 1449 case R_SPARC_TLS_GD_ADD: 1450 case R_SPARC_TLS_GD_CALL: 1451 checked_tlsgd = true; 1452 _bfd_sparc_elf_tdata (abfd)->has_tlsgd = true; 1453 break; 1454 } 1455 1456 r_type = sparc_elf_tls_transition (info, abfd, r_type, h == NULL); 1457 eh = (struct _bfd_sparc_elf_link_hash_entry *) h; 1458 1459 switch (r_type) 1460 { 1461 case R_SPARC_TLS_LDM_HI22: 1462 case R_SPARC_TLS_LDM_LO10: 1463 htab->tls_ldm_got.refcount += 1; 1464 if (eh != NULL) 1465 eh->has_got_reloc = 1; 1466 break; 1467 1468 case R_SPARC_TLS_LE_HIX22: 1469 case R_SPARC_TLS_LE_LOX10: 1470 if (!bfd_link_executable (info)) 1471 goto r_sparc_plt32; 1472 break; 1473 1474 case R_SPARC_TLS_IE_HI22: 1475 case R_SPARC_TLS_IE_LO10: 1476 if (!bfd_link_executable (info)) 1477 info->flags |= DF_STATIC_TLS; 1478 /* Fall through */ 1479 1480 case R_SPARC_GOT10: 1481 case R_SPARC_GOT13: 1482 case R_SPARC_GOT22: 1483 case R_SPARC_GOTDATA_HIX22: 1484 case R_SPARC_GOTDATA_LOX10: 1485 case R_SPARC_GOTDATA_OP_HIX22: 1486 case R_SPARC_GOTDATA_OP_LOX10: 1487 case R_SPARC_TLS_GD_HI22: 1488 case R_SPARC_TLS_GD_LO10: 1489 /* This symbol requires a global offset table entry. */ 1490 { 1491 int tls_type, old_tls_type; 1492 1493 switch (r_type) 1494 { 1495 case R_SPARC_TLS_GD_HI22: 1496 case R_SPARC_TLS_GD_LO10: 1497 tls_type = GOT_TLS_GD; 1498 break; 1499 case R_SPARC_TLS_IE_HI22: 1500 case R_SPARC_TLS_IE_LO10: 1501 tls_type = GOT_TLS_IE; 1502 break; 1503 default: 1504 tls_type = GOT_NORMAL; 1505 break; 1506 } 1507 1508 if (h != NULL) 1509 { 1510 h->got.refcount += 1; 1511 old_tls_type = _bfd_sparc_elf_hash_entry(h)->tls_type; 1512 } 1513 else 1514 { 1515 bfd_signed_vma *local_got_refcounts; 1516 1517 /* This is a global offset table entry for a local symbol. */ 1518 local_got_refcounts = elf_local_got_refcounts (abfd); 1519 if (local_got_refcounts == NULL) 1520 { 1521 bfd_size_type size; 1522 1523 size = symtab_hdr->sh_info; 1524 size *= (sizeof (bfd_signed_vma) + sizeof(char)); 1525 local_got_refcounts = ((bfd_signed_vma *) 1526 bfd_zalloc (abfd, size)); 1527 if (local_got_refcounts == NULL) 1528 return false; 1529 elf_local_got_refcounts (abfd) = local_got_refcounts; 1530 _bfd_sparc_elf_local_got_tls_type (abfd) 1531 = (char *) (local_got_refcounts + symtab_hdr->sh_info); 1532 } 1533 1534 if (r_type != R_SPARC_GOTDATA_OP_HIX22 1535 && r_type != R_SPARC_GOTDATA_OP_LOX10) 1536 local_got_refcounts[r_symndx] += 1; 1537 1538 old_tls_type 1539 = _bfd_sparc_elf_local_got_tls_type (abfd) [r_symndx]; 1540 } 1541 1542 /* If a TLS symbol is accessed using IE at least once, there is no 1543 point in using the dynamic model for it. */ 1544 if (old_tls_type != tls_type) 1545 { 1546 if (old_tls_type == GOT_UNKNOWN) 1547 ; 1548 else if (old_tls_type == GOT_TLS_GD && tls_type == GOT_TLS_IE) 1549 ; 1550 else if (old_tls_type == GOT_TLS_IE && tls_type == GOT_TLS_GD) 1551 tls_type = old_tls_type; 1552 else 1553 { 1554 _bfd_error_handler 1555 /* xgettext:c-format */ 1556 (_("%pB: `%s' accessed both as normal and thread local symbol"), 1557 abfd, h ? h->root.root.string : "<local>"); 1558 return false; 1559 } 1560 1561 if (h != NULL) 1562 _bfd_sparc_elf_hash_entry (h)->tls_type = tls_type; 1563 else 1564 _bfd_sparc_elf_local_got_tls_type (abfd) [r_symndx] = tls_type; 1565 } 1566 } 1567 1568 if (!htab->elf.sgot 1569 && !_bfd_elf_create_got_section (htab->elf.dynobj, info)) 1570 return false; 1571 1572 if (eh != NULL) 1573 { 1574 eh->has_got_reloc = 1; 1575 if (r_type == R_SPARC_GOT10 1576 || r_type == R_SPARC_GOT13 1577 || r_type == R_SPARC_GOT22) 1578 eh->has_old_style_got_reloc = 1; 1579 } 1580 break; 1581 1582 case R_SPARC_TLS_GD_CALL: 1583 case R_SPARC_TLS_LDM_CALL: 1584 if (bfd_link_executable (info)) 1585 break; 1586 1587 /* Essentially R_SPARC_WPLT30 relocs against __tls_get_addr. */ 1588 h = (struct elf_link_hash_entry *) 1589 bfd_link_hash_lookup (info->hash, "__tls_get_addr", false, 1590 false, true); 1591 BFD_ASSERT (h != NULL); 1592 /* Fall through */ 1593 1594 case R_SPARC_WPLT30: 1595 case R_SPARC_PLT32: 1596 case R_SPARC_PLT64: 1597 case R_SPARC_HIPLT22: 1598 case R_SPARC_LOPLT10: 1599 case R_SPARC_PCPLT32: 1600 case R_SPARC_PCPLT22: 1601 case R_SPARC_PCPLT10: 1602 /* This symbol requires a procedure linkage table entry. 1603 We actually build the entry in adjust_dynamic_symbol, 1604 because this might be a case of linking PIC code without 1605 linking in any dynamic objects, in which case we don't 1606 need to generate a procedure linkage table after all. */ 1607 1608 if (h == NULL) 1609 { 1610 if (! ABI_64_P (abfd)) 1611 { 1612 /* The Solaris native assembler will generate a WPLT30 1613 reloc for a local symbol if you assemble a call from 1614 one section to another when using -K pic. We treat 1615 it as WDISP30. */ 1616 if (r_type == R_SPARC_PLT32) 1617 goto r_sparc_plt32; 1618 break; 1619 } 1620 /* PR 7027: We need similar behaviour for 64-bit binaries. */ 1621 else if (r_type == R_SPARC_WPLT30) 1622 break; 1623 1624 /* It does not make sense to have a procedure linkage 1625 table entry for a local symbol. */ 1626 bfd_set_error (bfd_error_bad_value); 1627 return false; 1628 } 1629 1630 h->needs_plt = 1; 1631 1632 if (r_type == R_SPARC_PLT32 || r_type == R_SPARC_PLT64) 1633 goto r_sparc_plt32; 1634 1635 h->plt.refcount += 1; 1636 1637 eh = (struct _bfd_sparc_elf_link_hash_entry *) h; 1638 eh->has_got_reloc = 1; 1639 break; 1640 1641 case R_SPARC_PC10: 1642 case R_SPARC_PC22: 1643 case R_SPARC_PC_HH22: 1644 case R_SPARC_PC_HM10: 1645 case R_SPARC_PC_LM22: 1646 if (h != NULL) 1647 h->non_got_ref = 1; 1648 1649 if (h != NULL 1650 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 1651 break; 1652 /* Fall through. */ 1653 1654 case R_SPARC_DISP8: 1655 case R_SPARC_DISP16: 1656 case R_SPARC_DISP32: 1657 case R_SPARC_DISP64: 1658 case R_SPARC_WDISP30: 1659 case R_SPARC_WDISP22: 1660 case R_SPARC_WDISP19: 1661 case R_SPARC_WDISP16: 1662 case R_SPARC_WDISP10: 1663 case R_SPARC_8: 1664 case R_SPARC_16: 1665 case R_SPARC_32: 1666 case R_SPARC_HI22: 1667 case R_SPARC_22: 1668 case R_SPARC_13: 1669 case R_SPARC_LO10: 1670 case R_SPARC_UA16: 1671 case R_SPARC_UA32: 1672 case R_SPARC_10: 1673 case R_SPARC_11: 1674 case R_SPARC_64: 1675 case R_SPARC_OLO10: 1676 case R_SPARC_HH22: 1677 case R_SPARC_HM10: 1678 case R_SPARC_LM22: 1679 case R_SPARC_7: 1680 case R_SPARC_5: 1681 case R_SPARC_6: 1682 case R_SPARC_HIX22: 1683 case R_SPARC_LOX10: 1684 case R_SPARC_H44: 1685 case R_SPARC_M44: 1686 case R_SPARC_L44: 1687 case R_SPARC_H34: 1688 case R_SPARC_UA64: 1689 if (h != NULL) 1690 h->non_got_ref = 1; 1691 1692 if (eh != NULL && (sec->flags & SEC_CODE) != 0) 1693 eh->has_non_got_reloc = 1; 1694 1695 r_sparc_plt32: 1696 if (h != NULL && !bfd_link_pic (info)) 1697 { 1698 /* We may need a .plt entry if the function this reloc 1699 refers to is in a shared lib. */ 1700 h->plt.refcount += 1; 1701 } 1702 1703 /* If we are creating a shared library, and this is a reloc 1704 against a global symbol, or a non PC relative reloc 1705 against a local symbol, then we need to copy the reloc 1706 into the shared library. However, if we are linking with 1707 -Bsymbolic, we do not need to copy a reloc against a 1708 global symbol which is defined in an object we are 1709 including in the link (i.e., DEF_REGULAR is set). At 1710 this point we have not seen all the input files, so it is 1711 possible that DEF_REGULAR is not set now but will be set 1712 later (it is never cleared). In case of a weak definition, 1713 DEF_REGULAR may be cleared later by a strong definition in 1714 a shared library. We account for that possibility below by 1715 storing information in the relocs_copied field of the hash 1716 table entry. A similar situation occurs when creating 1717 shared libraries and symbol visibility changes render the 1718 symbol local. 1719 1720 If on the other hand, we are creating an executable, we 1721 may need to keep relocations for symbols satisfied by a 1722 dynamic library if we manage to avoid copy relocs for the 1723 symbol. */ 1724 if ((bfd_link_pic (info) 1725 && (sec->flags & SEC_ALLOC) != 0 1726 && (! _bfd_sparc_elf_howto_table[r_type].pc_relative 1727 || (h != NULL 1728 && (! SYMBOLIC_BIND (info, h) 1729 || h->root.type == bfd_link_hash_defweak 1730 || !h->def_regular)))) 1731 || (!bfd_link_pic (info) 1732 && (sec->flags & SEC_ALLOC) != 0 1733 && h != NULL 1734 && (h->root.type == bfd_link_hash_defweak 1735 || !h->def_regular)) 1736 || (!bfd_link_pic (info) 1737 && h != NULL 1738 && h->type == STT_GNU_IFUNC)) 1739 { 1740 struct elf_dyn_relocs *p; 1741 struct elf_dyn_relocs **head; 1742 1743 /* When creating a shared object, we must copy these 1744 relocs into the output file. We create a reloc 1745 section in dynobj and make room for the reloc. */ 1746 if (sreloc == NULL) 1747 { 1748 sreloc = _bfd_elf_make_dynamic_reloc_section 1749 (sec, htab->elf.dynobj, htab->word_align_power, 1750 abfd, /*rela?*/ true); 1751 1752 if (sreloc == NULL) 1753 return false; 1754 } 1755 1756 /* If this is a global symbol, we count the number of 1757 relocations we need for this symbol. */ 1758 if (h != NULL) 1759 head = &h->dyn_relocs; 1760 else 1761 { 1762 /* Track dynamic relocs needed for local syms too. 1763 We really need local syms available to do this 1764 easily. Oh well. */ 1765 asection *s; 1766 void *vpp; 1767 1768 BFD_ASSERT (isym != NULL); 1769 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 1770 if (s == NULL) 1771 s = sec; 1772 1773 vpp = &elf_section_data (s)->local_dynrel; 1774 head = (struct elf_dyn_relocs **) vpp; 1775 } 1776 1777 p = *head; 1778 if (p == NULL || p->sec != sec) 1779 { 1780 size_t amt = sizeof *p; 1781 p = ((struct elf_dyn_relocs *) 1782 bfd_alloc (htab->elf.dynobj, amt)); 1783 if (p == NULL) 1784 return false; 1785 p->next = *head; 1786 *head = p; 1787 p->sec = sec; 1788 p->count = 0; 1789 p->pc_count = 0; 1790 } 1791 1792 p->count += 1; 1793 if (_bfd_sparc_elf_howto_table[r_type].pc_relative) 1794 p->pc_count += 1; 1795 } 1796 1797 break; 1798 1799 case R_SPARC_GNU_VTINHERIT: 1800 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1801 return false; 1802 break; 1803 1804 case R_SPARC_GNU_VTENTRY: 1805 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1806 return false; 1807 break; 1808 1809 case R_SPARC_REGISTER: 1810 /* Nothing to do. */ 1811 break; 1812 1813 default: 1814 break; 1815 } 1816 } 1817 1818 return true; 1819} 1820 1821asection * 1822_bfd_sparc_elf_gc_mark_hook (asection *sec, 1823 struct bfd_link_info *info, 1824 Elf_Internal_Rela *rel, 1825 struct elf_link_hash_entry *h, 1826 Elf_Internal_Sym *sym) 1827{ 1828 if (h != NULL) 1829 switch (SPARC_ELF_R_TYPE (rel->r_info)) 1830 { 1831 case R_SPARC_GNU_VTINHERIT: 1832 case R_SPARC_GNU_VTENTRY: 1833 return NULL; 1834 } 1835 1836 if (!bfd_link_executable (info)) 1837 { 1838 switch (SPARC_ELF_R_TYPE (rel->r_info)) 1839 { 1840 case R_SPARC_TLS_GD_CALL: 1841 case R_SPARC_TLS_LDM_CALL: 1842 /* This reloc implicitly references __tls_get_addr. We know 1843 another reloc will reference the same symbol as the one 1844 on this reloc, so the real symbol and section will be 1845 gc marked when processing the other reloc. That lets 1846 us handle __tls_get_addr here. */ 1847 h = elf_link_hash_lookup (elf_hash_table (info), "__tls_get_addr", 1848 false, false, true); 1849 BFD_ASSERT (h != NULL); 1850 h->mark = 1; 1851 if (h->is_weakalias) 1852 weakdef (h)->mark = 1; 1853 sym = NULL; 1854 } 1855 } 1856 1857 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1858} 1859 1860static Elf_Internal_Rela * 1861sparc_elf_find_reloc_at_ofs (Elf_Internal_Rela *rel, 1862 Elf_Internal_Rela *relend, 1863 bfd_vma offset) 1864{ 1865 while (rel < relend) 1866 { 1867 if (rel->r_offset == offset) 1868 return rel; 1869 rel++; 1870 } 1871 return NULL; 1872} 1873 1874/* Remove undefined weak symbol from the dynamic symbol table if it 1875 is resolved to 0. */ 1876 1877bool 1878_bfd_sparc_elf_fixup_symbol (struct bfd_link_info *info, 1879 struct elf_link_hash_entry *h) 1880{ 1881 if (h->dynindx != -1 1882 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, 1883 _bfd_sparc_elf_hash_entry (h))) 1884 { 1885 h->dynindx = -1; 1886 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 1887 h->dynstr_index); 1888 } 1889 return true; 1890} 1891 1892/* Adjust a symbol defined by a dynamic object and referenced by a 1893 regular object. The current definition is in some section of the 1894 dynamic object, but we're not including those sections. We have to 1895 change the definition to something the rest of the link can 1896 understand. */ 1897 1898bool 1899_bfd_sparc_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 1900 struct elf_link_hash_entry *h) 1901{ 1902 struct _bfd_sparc_elf_link_hash_table *htab; 1903 asection *s, *srel; 1904 1905 htab = _bfd_sparc_elf_hash_table (info); 1906 BFD_ASSERT (htab != NULL); 1907 1908 /* Make sure we know what is going on here. */ 1909 BFD_ASSERT (htab->elf.dynobj != NULL 1910 && (h->needs_plt 1911 || h->type == STT_GNU_IFUNC 1912 || h->is_weakalias 1913 || (h->def_dynamic 1914 && h->ref_regular 1915 && !h->def_regular))); 1916 1917 /* If this is a function, put it in the procedure linkage table. We 1918 will fill in the contents of the procedure linkage table later 1919 (although we could actually do it here). The STT_NOTYPE 1920 condition is a hack specifically for the Oracle libraries 1921 delivered for Solaris; for some inexplicable reason, they define 1922 some of their functions as STT_NOTYPE when they really should be 1923 STT_FUNC. */ 1924 if (h->type == STT_FUNC 1925 || h->type == STT_GNU_IFUNC 1926 || h->needs_plt 1927 || (h->type == STT_NOTYPE 1928 && (h->root.type == bfd_link_hash_defined 1929 || h->root.type == bfd_link_hash_defweak) 1930 && (h->root.u.def.section->flags & SEC_CODE) != 0)) 1931 { 1932 if (h->plt.refcount <= 0 1933 || (h->type != STT_GNU_IFUNC 1934 && (SYMBOL_CALLS_LOCAL (info, h) 1935 || (h->root.type == bfd_link_hash_undefweak 1936 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))) 1937 { 1938 /* This case can occur if we saw a WPLT30 reloc in an input 1939 file, but the symbol was never referred to by a dynamic 1940 object, or if all references were garbage collected. In 1941 such a case, we don't actually need to build a procedure 1942 linkage table, and we can just do a WDISP30 reloc instead. */ 1943 h->plt.offset = (bfd_vma) -1; 1944 h->needs_plt = 0; 1945 } 1946 1947 return true; 1948 } 1949 else 1950 h->plt.offset = (bfd_vma) -1; 1951 1952 /* If this is a weak symbol, and there is a real definition, the 1953 processor independent code will have arranged for us to see the 1954 real definition first, and we can just use the same value. */ 1955 if (h->is_weakalias) 1956 { 1957 struct elf_link_hash_entry *def = weakdef (h); 1958 BFD_ASSERT (def->root.type == bfd_link_hash_defined); 1959 h->root.u.def.section = def->root.u.def.section; 1960 h->root.u.def.value = def->root.u.def.value; 1961 return true; 1962 } 1963 1964 /* This is a reference to a symbol defined by a dynamic object which 1965 is not a function. */ 1966 1967 /* If we are creating a shared library, we must presume that the 1968 only references to the symbol are via the global offset table. 1969 For such cases we need not do anything here; the relocations will 1970 be handled correctly by relocate_section. */ 1971 if (bfd_link_pic (info)) 1972 return true; 1973 1974 /* If there are no references to this symbol that do not use the 1975 GOT, we don't need to generate a copy reloc. */ 1976 if (!h->non_got_ref) 1977 return true; 1978 1979 /* If -z nocopyreloc was given, we won't generate them either. */ 1980 if (info->nocopyreloc) 1981 { 1982 h->non_got_ref = 0; 1983 return true; 1984 } 1985 1986 /* If we don't find any dynamic relocs in read-only sections, then 1987 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 1988 if (!_bfd_elf_readonly_dynrelocs (h)) 1989 { 1990 h->non_got_ref = 0; 1991 return true; 1992 } 1993 1994 /* We must allocate the symbol in our .dynbss section, which will 1995 become part of the .bss section of the executable. There will be 1996 an entry for this symbol in the .dynsym section. The dynamic 1997 object will contain position independent code, so all references 1998 from the dynamic object to this symbol will go through the global 1999 offset table. The dynamic linker will use the .dynsym entry to 2000 determine the address it must put in the global offset table, so 2001 both the dynamic object and the regular object will refer to the 2002 same memory location for the variable. */ 2003 2004 /* We must generate a R_SPARC_COPY reloc to tell the dynamic linker 2005 to copy the initial value out of the dynamic object and into the 2006 runtime process image. We need to remember the offset into the 2007 .rel.bss section we are going to use. */ 2008 if ((h->root.u.def.section->flags & SEC_READONLY) != 0) 2009 { 2010 s = htab->elf.sdynrelro; 2011 srel = htab->elf.sreldynrelro; 2012 } 2013 else 2014 { 2015 s = htab->elf.sdynbss; 2016 srel = htab->elf.srelbss; 2017 } 2018 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 2019 { 2020 srel->size += SPARC_ELF_RELA_BYTES (htab); 2021 h->needs_copy = 1; 2022 } 2023 2024 return _bfd_elf_adjust_dynamic_copy (info, h, s); 2025} 2026 2027/* Allocate space in .plt, .got and associated reloc sections for 2028 dynamic relocs. */ 2029 2030static bool 2031allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) 2032{ 2033 struct bfd_link_info *info; 2034 struct _bfd_sparc_elf_link_hash_table *htab; 2035 struct _bfd_sparc_elf_link_hash_entry *eh; 2036 struct elf_dyn_relocs *p; 2037 bool resolved_to_zero; 2038 2039 if (h->root.type == bfd_link_hash_indirect) 2040 return true; 2041 2042 info = (struct bfd_link_info *) inf; 2043 htab = _bfd_sparc_elf_hash_table (info); 2044 BFD_ASSERT (htab != NULL); 2045 2046 eh = (struct _bfd_sparc_elf_link_hash_entry *) h; 2047 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); 2048 2049 if ((htab->elf.dynamic_sections_created 2050 && h->plt.refcount > 0) 2051 || (h->type == STT_GNU_IFUNC 2052 && h->def_regular 2053 && h->ref_regular)) 2054 { 2055 /* Undefined weak syms won't yet be marked as dynamic. */ 2056 if (h->root.type == bfd_link_hash_undefweak 2057 && !resolved_to_zero 2058 && h->dynindx == -1 2059 && !h->forced_local) 2060 { 2061 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2062 return false; 2063 } 2064 2065 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h) 2066 || (h->type == STT_GNU_IFUNC 2067 && h->def_regular)) 2068 { 2069 asection *s = htab->elf.splt; 2070 2071 if (s == NULL) 2072 s = htab->elf.iplt; 2073 2074 /* Allocate room for the header. */ 2075 if (s->size == 0) 2076 { 2077 s->size = htab->plt_header_size; 2078 2079 /* Allocate space for the .rela.plt.unloaded relocations. */ 2080 if (htab->elf.target_os == is_vxworks 2081 && !bfd_link_pic (info)) 2082 htab->srelplt2->size = sizeof (Elf32_External_Rela) * 2; 2083 } 2084 2085 /* The procedure linkage table size is bounded by the magnitude 2086 of the offset we can describe in the entry. */ 2087 if (s->size >= (SPARC_ELF_WORD_BYTES(htab) == 8 ? 2088 (((bfd_vma)1 << 31) << 1) : 0x400000)) 2089 { 2090 bfd_set_error (bfd_error_bad_value); 2091 return false; 2092 } 2093 2094 if (SPARC_ELF_WORD_BYTES(htab) == 8 2095 && s->size >= PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE) 2096 { 2097 bfd_vma off = s->size - PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE; 2098 2099 2100 off = (off % (160 * PLT64_ENTRY_SIZE)) / PLT64_ENTRY_SIZE; 2101 2102 h->plt.offset = (s->size - (off * 8)); 2103 } 2104 else 2105 h->plt.offset = s->size; 2106 2107 /* If this symbol is not defined in a regular file, and we are 2108 not generating a shared library, then set the symbol to this 2109 location in the .plt. This is required to make function 2110 pointers compare as equal between the normal executable and 2111 the shared library. */ 2112 if (! bfd_link_pic (info) 2113 && !h->def_regular) 2114 { 2115 h->root.u.def.section = s; 2116 h->root.u.def.value = h->plt.offset; 2117 } 2118 2119 /* Make room for this entry. */ 2120 s->size += htab->plt_entry_size; 2121 2122 /* There should be no PLT relocations against resolved undefined 2123 weak symbols in the executable. */ 2124 if (!resolved_to_zero) 2125 { 2126 /* We also need to make an entry in the .rela.plt section. */ 2127 if (s == htab->elf.splt) 2128 htab->elf.srelplt->size += SPARC_ELF_RELA_BYTES (htab); 2129 else 2130 htab->elf.irelplt->size += SPARC_ELF_RELA_BYTES (htab); 2131 } 2132 2133 if (htab->elf.target_os == is_vxworks) 2134 { 2135 /* Allocate space for the .got.plt entry. */ 2136 htab->elf.sgotplt->size += 4; 2137 2138 /* ...and for the .rela.plt.unloaded relocations. */ 2139 if (!bfd_link_pic (info)) 2140 htab->srelplt2->size += sizeof (Elf32_External_Rela) * 3; 2141 } 2142 } 2143 else 2144 { 2145 h->plt.offset = (bfd_vma) -1; 2146 h->needs_plt = 0; 2147 } 2148 } 2149 else 2150 { 2151 h->plt.offset = (bfd_vma) -1; 2152 h->needs_plt = 0; 2153 } 2154 2155 /* If R_SPARC_TLS_IE_{HI22,LO10} symbol is now local to the binary, 2156 make it a R_SPARC_TLS_LE_{HI22,LO10} requiring no TLS entry. */ 2157 if (h->got.refcount > 0 2158 && bfd_link_executable (info) 2159 && h->dynindx == -1 2160 && _bfd_sparc_elf_hash_entry(h)->tls_type == GOT_TLS_IE) 2161 h->got.offset = (bfd_vma) -1; 2162 else if (h->got.refcount > 0) 2163 { 2164 asection *s; 2165 bool dyn; 2166 int tls_type = _bfd_sparc_elf_hash_entry(h)->tls_type; 2167 2168 /* Undefined weak syms won't yet be marked as dynamic. */ 2169 if (h->root.type == bfd_link_hash_undefweak 2170 && !resolved_to_zero 2171 && h->dynindx == -1 2172 && !h->forced_local) 2173 { 2174 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2175 return false; 2176 } 2177 2178 s = htab->elf.sgot; 2179 h->got.offset = s->size; 2180 s->size += SPARC_ELF_WORD_BYTES (htab); 2181 /* R_SPARC_TLS_GD_HI{22,LO10} needs 2 consecutive GOT slots. */ 2182 if (tls_type == GOT_TLS_GD) 2183 s->size += SPARC_ELF_WORD_BYTES (htab); 2184 dyn = htab->elf.dynamic_sections_created; 2185 /* R_SPARC_TLS_IE_{HI22,LO10} needs one dynamic relocation, 2186 R_SPARC_TLS_GD_{HI22,LO10} needs one if local and two if global. */ 2187 if ((tls_type == GOT_TLS_GD && h->dynindx == -1) 2188 || tls_type == GOT_TLS_IE 2189 || h->type == STT_GNU_IFUNC) 2190 htab->elf.srelgot->size += SPARC_ELF_RELA_BYTES (htab); 2191 else if (tls_type == GOT_TLS_GD) 2192 htab->elf.srelgot->size += 2 * SPARC_ELF_RELA_BYTES (htab); 2193 else if ((WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) 2194 /* Even if the symbol isn't dynamic, we may generate a 2195 reloc for the dynamic linker in PIC mode. */ 2196 || (h->dynindx == -1 2197 && !h->forced_local 2198 && h->root.type != bfd_link_hash_undefweak 2199 && bfd_link_pic (info))) 2200 /* No dynamic relocations are needed against resolved 2201 undefined weak symbols in an executable. */ 2202 && !(h->root.type == bfd_link_hash_undefweak 2203 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 2204 || resolved_to_zero))) 2205 htab->elf.srelgot->size += SPARC_ELF_RELA_BYTES (htab); 2206 } 2207 else 2208 h->got.offset = (bfd_vma) -1; 2209 2210 if (h->dyn_relocs == NULL) 2211 return true; 2212 2213 /* In the shared -Bsymbolic case, discard space allocated for 2214 dynamic pc-relative relocs against symbols which turn out to be 2215 defined in regular objects. For the normal shared case, discard 2216 space for pc-relative relocs that have become local due to symbol 2217 visibility changes. */ 2218 2219 if (bfd_link_pic (info)) 2220 { 2221 if (SYMBOL_CALLS_LOCAL (info, h)) 2222 { 2223 struct elf_dyn_relocs **pp; 2224 2225 for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) 2226 { 2227 p->count -= p->pc_count; 2228 p->pc_count = 0; 2229 if (p->count == 0) 2230 *pp = p->next; 2231 else 2232 pp = &p->next; 2233 } 2234 } 2235 2236 if (htab->elf.target_os == is_vxworks) 2237 { 2238 struct elf_dyn_relocs **pp; 2239 2240 for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) 2241 { 2242 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) 2243 *pp = p->next; 2244 else 2245 pp = &p->next; 2246 } 2247 } 2248 2249 /* Also discard relocs on undefined weak syms with non-default 2250 visibility or in PIE. */ 2251 if (h->dyn_relocs != NULL 2252 && h->root.type == bfd_link_hash_undefweak) 2253 { 2254 /* An undefined weak symbol is never 2255 bound locally in a shared library. */ 2256 2257 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 2258 || resolved_to_zero) 2259 { 2260 if (h->non_got_ref) 2261 { 2262 /* Keep dynamic non-GOT/non-PLT relocation so that we 2263 can branch to 0 without PLT. */ 2264 struct elf_dyn_relocs **pp; 2265 2266 for (pp = &h->dyn_relocs; (p = *pp) != NULL;) 2267 if (p->pc_count == 0) 2268 *pp = p->next; 2269 else 2270 { 2271 /* Remove other relocations. */ 2272 p->count = p->pc_count; 2273 pp = &p->next; 2274 } 2275 2276 if (h->dyn_relocs != NULL) 2277 { 2278 /* Make sure undefined weak symbols are output 2279 as dynamic symbols in PIEs for dynamic non-GOT 2280 non-PLT reloations. */ 2281 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2282 return false; 2283 } 2284 } 2285 else 2286 h->dyn_relocs = NULL; 2287 } 2288 2289 /* Make sure undefined weak symbols are output as a dynamic 2290 symbol in PIEs. */ 2291 else if (h->dynindx == -1 2292 && !h->forced_local) 2293 { 2294 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2295 return false; 2296 } 2297 } 2298 } 2299 else 2300 { 2301 /* For the non-shared case, discard space for relocs against 2302 symbols which turn out to need copy relocs or are not 2303 dynamic. */ 2304 2305 if ((!h->non_got_ref 2306 || (h->root.type == bfd_link_hash_undefweak 2307 && !resolved_to_zero)) 2308 && ((h->def_dynamic 2309 && !h->def_regular) 2310 || (htab->elf.dynamic_sections_created 2311 && (h->root.type == bfd_link_hash_undefweak 2312 || h->root.type == bfd_link_hash_undefined)))) 2313 { 2314 /* Undefined weak syms won't yet be marked as dynamic. */ 2315 if (h->root.type == bfd_link_hash_undefweak 2316 && !resolved_to_zero 2317 && h->dynindx == -1 2318 && !h->forced_local) 2319 { 2320 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2321 return false; 2322 } 2323 2324 /* If that succeeded, we know we'll be keeping all the 2325 relocs. */ 2326 if (h->dynindx != -1) 2327 goto keep; 2328 } 2329 2330 h->dyn_relocs = NULL; 2331 2332 keep: ; 2333 } 2334 2335 /* Finally, allocate space. */ 2336 for (p = h->dyn_relocs; p != NULL; p = p->next) 2337 { 2338 asection *sreloc = elf_section_data (p->sec)->sreloc; 2339 sreloc->size += p->count * SPARC_ELF_RELA_BYTES (htab); 2340 } 2341 2342 return true; 2343} 2344 2345/* Allocate space in .plt, .got and associated reloc sections for 2346 local dynamic relocs. */ 2347 2348static int 2349allocate_local_dynrelocs (void **slot, void *inf) 2350{ 2351 struct elf_link_hash_entry *h 2352 = (struct elf_link_hash_entry *) *slot; 2353 2354 if (h->type != STT_GNU_IFUNC 2355 || !h->def_regular 2356 || !h->ref_regular 2357 || !h->forced_local 2358 || h->root.type != bfd_link_hash_defined) 2359 abort (); 2360 2361 return allocate_dynrelocs (h, inf); 2362} 2363 2364/* Return true if the dynamic symbol for a given section should be 2365 omitted when creating a shared library. */ 2366 2367bool 2368_bfd_sparc_elf_omit_section_dynsym (bfd *output_bfd, 2369 struct bfd_link_info *info, 2370 asection *p) 2371{ 2372 /* We keep the .got section symbol so that explicit relocations 2373 against the _GLOBAL_OFFSET_TABLE_ symbol emitted in PIC mode 2374 can be turned into relocations against the .got symbol. */ 2375 if (strcmp (p->name, ".got") == 0) 2376 return false; 2377 2378 return _bfd_elf_omit_section_dynsym_default (output_bfd, info, p); 2379} 2380 2381/* Set the sizes of the dynamic sections. */ 2382 2383bool 2384_bfd_sparc_elf_size_dynamic_sections (bfd *output_bfd, 2385 struct bfd_link_info *info) 2386{ 2387 struct _bfd_sparc_elf_link_hash_table *htab; 2388 bfd *dynobj; 2389 asection *s; 2390 bfd *ibfd; 2391 2392 htab = _bfd_sparc_elf_hash_table (info); 2393 BFD_ASSERT (htab != NULL); 2394 dynobj = htab->elf.dynobj; 2395 BFD_ASSERT (dynobj != NULL); 2396 2397 if (elf_hash_table (info)->dynamic_sections_created) 2398 { 2399 /* Set the contents of the .interp section to the interpreter. */ 2400 if (bfd_link_executable (info) && !info->nointerp) 2401 { 2402 s = bfd_get_linker_section (dynobj, ".interp"); 2403 BFD_ASSERT (s != NULL); 2404 s->size = htab->dynamic_interpreter_size; 2405 s->contents = (unsigned char *) htab->dynamic_interpreter; 2406 htab->interp = s; 2407 } 2408 } 2409 2410 /* Set up .got offsets for local syms, and space for local dynamic 2411 relocs. */ 2412 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 2413 { 2414 bfd_signed_vma *local_got; 2415 bfd_signed_vma *end_local_got; 2416 char *local_tls_type; 2417 bfd_size_type locsymcount; 2418 Elf_Internal_Shdr *symtab_hdr; 2419 asection *srel; 2420 2421 if (! is_sparc_elf (ibfd)) 2422 continue; 2423 2424 for (s = ibfd->sections; s != NULL; s = s->next) 2425 { 2426 struct elf_dyn_relocs *p; 2427 2428 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) 2429 { 2430 if (!bfd_is_abs_section (p->sec) 2431 && bfd_is_abs_section (p->sec->output_section)) 2432 { 2433 /* Input section has been discarded, either because 2434 it is a copy of a linkonce section or due to 2435 linker script /DISCARD/, so we'll be discarding 2436 the relocs too. */ 2437 } 2438 else if (htab->elf.target_os == is_vxworks 2439 && strcmp (p->sec->output_section->name, 2440 ".tls_vars") == 0) 2441 { 2442 /* Relocations in vxworks .tls_vars sections are 2443 handled specially by the loader. */ 2444 } 2445 else if (p->count != 0) 2446 { 2447 srel = elf_section_data (p->sec)->sreloc; 2448 if (!htab->elf.dynamic_sections_created) 2449 srel = htab->elf.irelplt; 2450 srel->size += p->count * SPARC_ELF_RELA_BYTES (htab); 2451 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2452 { 2453 info->flags |= DF_TEXTREL; 2454 info->callbacks->minfo (_("%pB: dynamic relocation in read-only section `%pA'\n"), 2455 p->sec->owner, p->sec); 2456 } 2457 } 2458 } 2459 } 2460 2461 local_got = elf_local_got_refcounts (ibfd); 2462 if (!local_got) 2463 continue; 2464 2465 symtab_hdr = &elf_symtab_hdr (ibfd); 2466 locsymcount = symtab_hdr->sh_info; 2467 end_local_got = local_got + locsymcount; 2468 local_tls_type = _bfd_sparc_elf_local_got_tls_type (ibfd); 2469 s = htab->elf.sgot; 2470 srel = htab->elf.srelgot; 2471 for (; local_got < end_local_got; ++local_got, ++local_tls_type) 2472 { 2473 if (*local_got > 0) 2474 { 2475 *local_got = s->size; 2476 s->size += SPARC_ELF_WORD_BYTES (htab); 2477 if (*local_tls_type == GOT_TLS_GD) 2478 s->size += SPARC_ELF_WORD_BYTES (htab); 2479 if (bfd_link_pic (info) 2480 || *local_tls_type == GOT_TLS_GD 2481 || *local_tls_type == GOT_TLS_IE) 2482 srel->size += SPARC_ELF_RELA_BYTES (htab); 2483 } 2484 else 2485 *local_got = (bfd_vma) -1; 2486 } 2487 } 2488 2489 if (htab->tls_ldm_got.refcount > 0) 2490 { 2491 /* Allocate 2 got entries and 1 dynamic reloc for 2492 R_SPARC_TLS_LDM_{HI22,LO10} relocs. */ 2493 htab->tls_ldm_got.offset = htab->elf.sgot->size; 2494 htab->elf.sgot->size += (2 * SPARC_ELF_WORD_BYTES (htab)); 2495 htab->elf.srelgot->size += SPARC_ELF_RELA_BYTES (htab); 2496 } 2497 else 2498 htab->tls_ldm_got.offset = -1; 2499 2500 /* Allocate global sym .plt and .got entries, and space for global 2501 sym dynamic relocs. */ 2502 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); 2503 2504 /* Allocate .plt and .got entries, and space for local symbols. */ 2505 htab_traverse (htab->loc_hash_table, allocate_local_dynrelocs, info); 2506 2507 if (! ABI_64_P (output_bfd) 2508 && htab->elf.target_os != is_vxworks 2509 && elf_hash_table (info)->dynamic_sections_created) 2510 { 2511 /* Make space for the trailing nop in .plt. */ 2512 if (htab->elf.splt->size > 0) 2513 htab->elf.splt->size += 1 * SPARC_INSN_BYTES; 2514 2515 /* If the .got section is more than 0x1000 bytes, we add 2516 0x1000 to the value of _GLOBAL_OFFSET_TABLE_, so that 13 2517 bit relocations have a greater chance of working. 2518 2519 FIXME: Make this optimization work for 64-bit too. */ 2520 if (htab->elf.sgot->size >= 0x1000 2521 && elf_hash_table (info)->hgot->root.u.def.value == 0) 2522 elf_hash_table (info)->hgot->root.u.def.value = 0x1000; 2523 } 2524 2525 /* The check_relocs and adjust_dynamic_symbol entry points have 2526 determined the sizes of the various dynamic sections. Allocate 2527 memory for them. */ 2528 for (s = dynobj->sections; s != NULL; s = s->next) 2529 { 2530 if ((s->flags & SEC_LINKER_CREATED) == 0) 2531 continue; 2532 2533 if (s == htab->elf.splt 2534 || s == htab->elf.sgot 2535 || s == htab->elf.sdynbss 2536 || s == htab->elf.sdynrelro 2537 || s == htab->elf.iplt 2538 || s == htab->elf.sgotplt) 2539 { 2540 /* Strip this section if we don't need it; see the 2541 comment below. */ 2542 } 2543 else if (startswith (s->name, ".rela")) 2544 { 2545 if (s->size != 0) 2546 { 2547 /* We use the reloc_count field as a counter if we need 2548 to copy relocs into the output file. */ 2549 s->reloc_count = 0; 2550 } 2551 } 2552 else 2553 { 2554 /* It's not one of our sections. */ 2555 continue; 2556 } 2557 2558 if (s->size == 0) 2559 { 2560 /* If we don't need this section, strip it from the 2561 output file. This is mostly to handle .rela.bss and 2562 .rela.plt. We must create both sections in 2563 create_dynamic_sections, because they must be created 2564 before the linker maps input sections to output 2565 sections. The linker does that before 2566 adjust_dynamic_symbol is called, and it is that 2567 function which decides whether anything needs to go 2568 into these sections. */ 2569 s->flags |= SEC_EXCLUDE; 2570 continue; 2571 } 2572 2573 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2574 continue; 2575 2576 /* Allocate memory for the section contents. Zero the memory 2577 for the benefit of .rela.plt, which has 4 unused entries 2578 at the beginning, and we don't want garbage. */ 2579 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 2580 if (s->contents == NULL) 2581 return false; 2582 } 2583 2584 if (elf_hash_table (info)->dynamic_sections_created) 2585 { 2586 /* Add some entries to the .dynamic section. We fill in the 2587 values later, in _bfd_sparc_elf_finish_dynamic_sections, but we 2588 must add the entries now so that we get the correct size for 2589 the .dynamic section. The DT_DEBUG entry is filled in by the 2590 dynamic linker and used by the debugger. */ 2591#define add_dynamic_entry(TAG, VAL) \ 2592 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2593 2594 if (!_bfd_elf_maybe_vxworks_add_dynamic_tags (output_bfd, info, 2595 true)) 2596 return false; 2597 2598 if (ABI_64_P (output_bfd)) 2599 { 2600 int reg; 2601 struct _bfd_sparc_elf_app_reg * app_regs; 2602 struct elf_strtab_hash *dynstr; 2603 struct elf_link_hash_table *eht = elf_hash_table (info); 2604 2605 /* Add dynamic STT_REGISTER symbols and corresponding DT_SPARC_REGISTER 2606 entries if needed. */ 2607 app_regs = _bfd_sparc_elf_hash_table (info)->app_regs; 2608 dynstr = eht->dynstr; 2609 2610 for (reg = 0; reg < 4; reg++) 2611 if (app_regs [reg].name != NULL) 2612 { 2613 struct elf_link_local_dynamic_entry *entry, *e; 2614 2615 if (!add_dynamic_entry (DT_SPARC_REGISTER, 0)) 2616 return false; 2617 2618 entry = (struct elf_link_local_dynamic_entry *) 2619 bfd_hash_allocate (&info->hash->table, sizeof (*entry)); 2620 if (entry == NULL) 2621 return false; 2622 2623 /* We cheat here a little bit: the symbol will not be local, so we 2624 put it at the end of the dynlocal linked list. We will fix it 2625 later on, as we have to fix other fields anyway. */ 2626 entry->isym.st_value = reg < 2 ? reg + 2 : reg + 4; 2627 entry->isym.st_size = 0; 2628 if (*app_regs [reg].name != '\0') 2629 entry->isym.st_name 2630 = _bfd_elf_strtab_add (dynstr, app_regs[reg].name, false); 2631 else 2632 entry->isym.st_name = 0; 2633 entry->isym.st_other = 0; 2634 entry->isym.st_info = ELF_ST_INFO (app_regs [reg].bind, 2635 STT_REGISTER); 2636 entry->isym.st_shndx = app_regs [reg].shndx; 2637 entry->isym.st_target_internal = 0; 2638 entry->next = NULL; 2639 entry->input_bfd = output_bfd; 2640 entry->input_indx = -1; 2641 2642 if (eht->dynlocal == NULL) 2643 eht->dynlocal = entry; 2644 else 2645 { 2646 for (e = eht->dynlocal; e->next; e = e->next) 2647 ; 2648 e->next = entry; 2649 } 2650 eht->dynsymcount++; 2651 } 2652 } 2653 } 2654#undef add_dynamic_entry 2655 2656 return true; 2657} 2658 2659bool 2660_bfd_sparc_elf_new_section_hook (bfd *abfd, asection *sec) 2661{ 2662 if (!sec->used_by_bfd) 2663 { 2664 struct _bfd_sparc_elf_section_data *sdata; 2665 size_t amt = sizeof (*sdata); 2666 2667 sdata = bfd_zalloc (abfd, amt); 2668 if (sdata == NULL) 2669 return false; 2670 sec->used_by_bfd = sdata; 2671 } 2672 2673 return _bfd_elf_new_section_hook (abfd, sec); 2674} 2675 2676bool 2677_bfd_sparc_elf_relax_section (bfd *abfd ATTRIBUTE_UNUSED, 2678 struct bfd_section *section, 2679 struct bfd_link_info *link_info ATTRIBUTE_UNUSED, 2680 bool *again) 2681{ 2682 if (bfd_link_relocatable (link_info)) 2683 (*link_info->callbacks->einfo) 2684 (_("%P%F: --relax and -r may not be used together\n")); 2685 2686 *again = false; 2687 sec_do_relax (section) = 1; 2688 return true; 2689} 2690 2691/* Return the base VMA address which should be subtracted from real addresses 2692 when resolving @dtpoff relocation. 2693 This is PT_TLS segment p_vaddr. */ 2694 2695static bfd_vma 2696dtpoff_base (struct bfd_link_info *info) 2697{ 2698 /* If tls_sec is NULL, we should have signalled an error already. */ 2699 if (elf_hash_table (info)->tls_sec == NULL) 2700 return 0; 2701 return elf_hash_table (info)->tls_sec->vma; 2702} 2703 2704/* Return the relocation value for @tpoff relocation 2705 if STT_TLS virtual address is ADDRESS. */ 2706 2707static bfd_vma 2708tpoff (struct bfd_link_info *info, bfd_vma address) 2709{ 2710 struct elf_link_hash_table *htab = elf_hash_table (info); 2711 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); 2712 bfd_vma static_tls_size; 2713 2714 /* If tls_sec is NULL, we should have signalled an error already. */ 2715 if (htab->tls_sec == NULL) 2716 return 0; 2717 2718 /* Consider special static TLS alignment requirements. */ 2719 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); 2720 return address - static_tls_size - htab->tls_sec->vma; 2721} 2722 2723/* Return the relocation value for a %gdop relocation. */ 2724 2725static bfd_vma 2726gdopoff (struct bfd_link_info *info, bfd_vma address) 2727{ 2728 struct elf_link_hash_table *htab = elf_hash_table (info); 2729 bfd_vma got_base; 2730 2731 got_base = (htab->hgot->root.u.def.value 2732 + htab->hgot->root.u.def.section->output_offset 2733 + htab->hgot->root.u.def.section->output_section->vma); 2734 2735 return address - got_base; 2736} 2737 2738/* Return whether H is local and its ADDRESS is within 4G of 2739 _GLOBAL_OFFSET_TABLE_ and thus the offset may be calculated by a 2740 sethi, xor sequence. */ 2741 2742static bool 2743gdop_relative_offset_ok (struct bfd_link_info *info, 2744 struct elf_link_hash_entry *h, 2745 bfd_vma address ATTRIBUTE_UNUSED) 2746{ 2747 if (!SYMBOL_REFERENCES_LOCAL (info, h)) 2748 return false; 2749 /* If H is undefined, ADDRESS will be zero. We can't allow a 2750 relative offset to "zero" when producing PIEs or shared libs. 2751 Note that to get here with an undefined symbol it must also be 2752 hidden or internal visibility. */ 2753 if (bfd_link_pic (info) 2754 && h != NULL 2755 && (h->root.type == bfd_link_hash_undefweak 2756 || h->root.type == bfd_link_hash_undefined)) 2757 return false; 2758#ifdef BFD64 2759 return gdopoff (info, address) + ((bfd_vma) 1 << 32) < (bfd_vma) 2 << 32; 2760#else 2761 return true; 2762#endif 2763} 2764 2765/* Relocate a SPARC ELF section. */ 2766 2767int 2768_bfd_sparc_elf_relocate_section (bfd *output_bfd, 2769 struct bfd_link_info *info, 2770 bfd *input_bfd, 2771 asection *input_section, 2772 bfd_byte *contents, 2773 Elf_Internal_Rela *relocs, 2774 Elf_Internal_Sym *local_syms, 2775 asection **local_sections) 2776{ 2777 struct _bfd_sparc_elf_link_hash_table *htab; 2778 Elf_Internal_Shdr *symtab_hdr; 2779 struct elf_link_hash_entry **sym_hashes; 2780 bfd_vma *local_got_offsets; 2781 bfd_vma got_base; 2782 asection *sreloc; 2783 Elf_Internal_Rela *rel; 2784 Elf_Internal_Rela *relend; 2785 int num_relocs; 2786 bool is_vxworks_tls; 2787 2788 htab = _bfd_sparc_elf_hash_table (info); 2789 BFD_ASSERT (htab != NULL); 2790 symtab_hdr = &elf_symtab_hdr (input_bfd); 2791 sym_hashes = elf_sym_hashes (input_bfd); 2792 local_got_offsets = elf_local_got_offsets (input_bfd); 2793 2794 if (elf_hash_table (info)->hgot == NULL) 2795 got_base = 0; 2796 else 2797 got_base = elf_hash_table (info)->hgot->root.u.def.value; 2798 2799 sreloc = elf_section_data (input_section)->sreloc; 2800 /* We have to handle relocations in vxworks .tls_vars sections 2801 specially, because the dynamic loader is 'weird'. */ 2802 is_vxworks_tls = (htab->elf.target_os == is_vxworks 2803 && bfd_link_pic (info) 2804 && !strcmp (input_section->output_section->name, 2805 ".tls_vars")); 2806 2807 rel = relocs; 2808 if (ABI_64_P (output_bfd)) 2809 num_relocs = NUM_SHDR_ENTRIES (_bfd_elf_single_rel_hdr (input_section)); 2810 else 2811 num_relocs = input_section->reloc_count; 2812 relend = relocs + num_relocs; 2813 for (; rel < relend; rel++) 2814 { 2815 int r_type, tls_type; 2816 reloc_howto_type *howto; 2817 unsigned long r_symndx; 2818 struct elf_link_hash_entry *h; 2819 struct _bfd_sparc_elf_link_hash_entry *eh; 2820 Elf_Internal_Sym *sym; 2821 asection *sec; 2822 bfd_vma relocation, off; 2823 bfd_reloc_status_type r; 2824 bool is_plt = false; 2825 bool unresolved_reloc; 2826 bool resolved_to_zero; 2827 bool relative_reloc; 2828 2829 r_type = SPARC_ELF_R_TYPE (rel->r_info); 2830 if (r_type == R_SPARC_GNU_VTINHERIT 2831 || r_type == R_SPARC_GNU_VTENTRY) 2832 continue; 2833 2834 if (r_type < 0 || r_type >= (int) R_SPARC_max_std) 2835 { 2836 bfd_set_error (bfd_error_bad_value); 2837 return false; 2838 } 2839 2840 howto = _bfd_sparc_elf_howto_table + r_type; 2841 r_symndx = SPARC_ELF_R_SYMNDX (htab, rel->r_info); 2842 h = NULL; 2843 sym = NULL; 2844 sec = NULL; 2845 unresolved_reloc = false; 2846 if (r_symndx < symtab_hdr->sh_info) 2847 { 2848 sym = local_syms + r_symndx; 2849 sec = local_sections[r_symndx]; 2850 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2851 2852 if (!bfd_link_relocatable (info) 2853 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 2854 { 2855 /* Relocate against local STT_GNU_IFUNC symbol. */ 2856 h = elf_sparc_get_local_sym_hash (htab, input_bfd, 2857 rel, false); 2858 if (h == NULL) 2859 abort (); 2860 2861 /* Set STT_GNU_IFUNC symbol value. */ 2862 h->root.u.def.value = sym->st_value; 2863 h->root.u.def.section = sec; 2864 } 2865 } 2866 else 2867 { 2868 bool warned, ignored; 2869 2870 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 2871 r_symndx, symtab_hdr, sym_hashes, 2872 h, sec, relocation, 2873 unresolved_reloc, warned, ignored); 2874 if (warned) 2875 { 2876 /* To avoid generating warning messages about truncated 2877 relocations, set the relocation's address to be the same as 2878 the start of this section. */ 2879 if (input_section->output_section != NULL) 2880 relocation = input_section->output_section->vma; 2881 else 2882 relocation = 0; 2883 } 2884 } 2885 2886 if (sec != NULL && discarded_section (sec)) 2887 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2888 rel, 1, relend, howto, 0, contents); 2889 2890 if (bfd_link_relocatable (info)) 2891 continue; 2892 2893 if (h != NULL 2894 && h->type == STT_GNU_IFUNC 2895 && h->def_regular) 2896 { 2897 asection *plt_sec; 2898 const char *name; 2899 2900 if ((input_section->flags & SEC_ALLOC) == 0 2901 || h->plt.offset == (bfd_vma) -1) 2902 { 2903 /* If this is a SHT_NOTE section without SHF_ALLOC, treat 2904 STT_GNU_IFUNC symbol as STT_FUNC. */ 2905 if (elf_section_type (input_section) == SHT_NOTE) 2906 goto skip_ifunc; 2907 2908 /* Dynamic relocs are not propagated for SEC_DEBUGGING 2909 sections because such sections are not SEC_ALLOC and 2910 thus ld.so will not process them. */ 2911 if ((input_section->flags & SEC_ALLOC) == 0 2912 && (input_section->flags & SEC_DEBUGGING) != 0) 2913 continue; 2914 2915 _bfd_error_handler 2916 /* xgettext:c-format */ 2917 (_("%pB(%pA+%#" PRIx64 "): " 2918 "unresolvable %s relocation against symbol `%s'"), 2919 input_bfd, 2920 input_section, 2921 (uint64_t) rel->r_offset, 2922 howto->name, 2923 h->root.root.string); 2924 bfd_set_error (bfd_error_bad_value); 2925 return false; 2926 } 2927 2928 plt_sec = htab->elf.splt; 2929 if (! plt_sec) 2930 plt_sec =htab->elf.iplt; 2931 2932 switch (r_type) 2933 { 2934 case R_SPARC_GOTDATA_OP: 2935 continue; 2936 2937 case R_SPARC_GOTDATA_OP_HIX22: 2938 case R_SPARC_GOTDATA_OP_LOX10: 2939 r_type = (r_type == R_SPARC_GOTDATA_OP_HIX22 2940 ? R_SPARC_GOT22 2941 : R_SPARC_GOT10); 2942 howto = _bfd_sparc_elf_howto_table + r_type; 2943 /* Fall through. */ 2944 2945 case R_SPARC_GOT10: 2946 case R_SPARC_GOT13: 2947 case R_SPARC_GOT22: 2948 if (htab->elf.sgot == NULL) 2949 abort (); 2950 off = h->got.offset; 2951 if (off == (bfd_vma) -1) 2952 abort(); 2953 relocation = htab->elf.sgot->output_offset + off - got_base; 2954 goto do_relocation; 2955 2956 case R_SPARC_WPLT30: 2957 case R_SPARC_WDISP30: 2958 relocation = (plt_sec->output_section->vma 2959 + plt_sec->output_offset + h->plt.offset); 2960 goto do_relocation; 2961 2962 case R_SPARC_32: 2963 case R_SPARC_64: 2964 if (bfd_link_pic (info) && h->non_got_ref) 2965 { 2966 Elf_Internal_Rela outrel; 2967 bfd_vma offset; 2968 2969 offset = _bfd_elf_section_offset (output_bfd, info, 2970 input_section, 2971 rel->r_offset); 2972 if (offset == (bfd_vma) -1 2973 || offset == (bfd_vma) -2) 2974 abort(); 2975 2976 outrel.r_offset = (input_section->output_section->vma 2977 + input_section->output_offset 2978 + offset); 2979 2980 if (h->dynindx == -1 2981 || h->forced_local 2982 || bfd_link_executable (info)) 2983 { 2984 outrel.r_info = SPARC_ELF_R_INFO (htab, NULL, 2985 0, R_SPARC_IRELATIVE); 2986 outrel.r_addend = relocation + rel->r_addend; 2987 } 2988 else 2989 { 2990 if (h->dynindx == -1) 2991 abort(); 2992 outrel.r_info = SPARC_ELF_R_INFO (htab, rel, h->dynindx, r_type); 2993 outrel.r_addend = rel->r_addend; 2994 } 2995 2996 sparc_elf_append_rela (output_bfd, sreloc, &outrel); 2997 continue; 2998 } 2999 3000 relocation = (plt_sec->output_section->vma 3001 + plt_sec->output_offset + h->plt.offset); 3002 goto do_relocation; 3003 3004 case R_SPARC_HI22: 3005 case R_SPARC_LO10: 3006 /* We should only see such relocs in static links. */ 3007 if (bfd_link_pic (info)) 3008 abort(); 3009 relocation = (plt_sec->output_section->vma 3010 + plt_sec->output_offset + h->plt.offset); 3011 goto do_relocation; 3012 3013 default: 3014 if (h->root.root.string) 3015 name = h->root.root.string; 3016 else 3017 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, 3018 NULL); 3019 _bfd_error_handler 3020 /* xgettext:c-format */ 3021 (_("%pB: relocation %s against STT_GNU_IFUNC " 3022 "symbol `%s' isn't handled by %s"), input_bfd, 3023 _bfd_sparc_elf_howto_table[r_type].name, 3024 name, __FUNCTION__); 3025 bfd_set_error (bfd_error_bad_value); 3026 return false; 3027 } 3028 } 3029 3030 skip_ifunc: 3031 eh = (struct _bfd_sparc_elf_link_hash_entry *) h; 3032 resolved_to_zero = eh && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); 3033 3034 switch (r_type) 3035 { 3036 case R_SPARC_GOTDATA_OP_HIX22: 3037 case R_SPARC_GOTDATA_OP_LOX10: 3038 if (gdop_relative_offset_ok (info, h, relocation)) 3039 { 3040 r_type = (r_type == R_SPARC_GOTDATA_OP_HIX22 3041 ? R_SPARC_GOTDATA_HIX22 3042 : R_SPARC_GOTDATA_LOX10); 3043 howto = _bfd_sparc_elf_howto_table + r_type; 3044 } 3045 break; 3046 3047 case R_SPARC_GOTDATA_OP: 3048 if (gdop_relative_offset_ok (info, h, relocation)) 3049 { 3050 bfd_vma insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 3051 3052 /* {ld,ldx} [%rs1 + %rs2], %rd --> add %rs1, %rs2, %rd */ 3053 relocation = 0x80000000 | (insn & 0x3e07c01f); 3054 bfd_put_32 (output_bfd, relocation, contents + rel->r_offset); 3055 3056 /* If the symbol is global but not dynamic, an .rela.* slot has 3057 been allocated for it in the GOT so output R_SPARC_NONE here, 3058 if it isn't also subject to another, old-style GOT relocation. 3059 See also the handling of these GOT relocations just below. */ 3060 if (h != NULL 3061 && h->dynindx == -1 3062 && !h->forced_local 3063 && h->root.type != bfd_link_hash_undefweak 3064 && !eh->has_old_style_got_reloc 3065 && (h->got.offset & 1) == 0 3066 && bfd_link_pic (info)) 3067 { 3068 asection *s = htab->elf.srelgot; 3069 Elf_Internal_Rela outrel; 3070 3071 BFD_ASSERT (s != NULL); 3072 3073 memset (&outrel, 0, sizeof outrel); 3074 sparc_elf_append_rela (output_bfd, s, &outrel); 3075 h->got.offset |= 1; 3076 } 3077 } 3078 continue; 3079 } 3080 3081 switch (r_type) 3082 { 3083 case R_SPARC_GOTDATA_HIX22: 3084 case R_SPARC_GOTDATA_LOX10: 3085 relocation = gdopoff (info, relocation); 3086 break; 3087 3088 case R_SPARC_GOTDATA_OP_HIX22: 3089 case R_SPARC_GOTDATA_OP_LOX10: 3090 case R_SPARC_GOT10: 3091 case R_SPARC_GOT13: 3092 case R_SPARC_GOT22: 3093 /* Relocation is to the entry for this symbol in the global 3094 offset table. */ 3095 if (htab->elf.sgot == NULL) 3096 abort (); 3097 3098 relative_reloc = false; 3099 if (h != NULL) 3100 { 3101 bool dyn; 3102 3103 off = h->got.offset; 3104 BFD_ASSERT (off != (bfd_vma) -1); 3105 dyn = elf_hash_table (info)->dynamic_sections_created; 3106 3107 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 3108 bfd_link_pic (info), 3109 h) 3110 || (bfd_link_pic (info) 3111 && SYMBOL_REFERENCES_LOCAL (info, h))) 3112 { 3113 /* This is actually a static link, or it is a 3114 -Bsymbolic link and the symbol is defined 3115 locally, or the symbol was forced to be local 3116 because of a version file. We must initialize 3117 this entry in the global offset table. Since the 3118 offset must always be a multiple of 8 for 64-bit 3119 and 4 for 32-bit, we use the least significant bit 3120 to record whether we have initialized it already. 3121 3122 When doing a dynamic link, we create a .rela.got 3123 relocation entry to initialize the value. This 3124 is done in the finish_dynamic_symbol routine. */ 3125 if ((off & 1) != 0) 3126 off &= ~1; 3127 else 3128 { 3129 /* If this symbol isn't dynamic in PIC mode, treat it 3130 like a local symbol in PIC mode below. */ 3131 if (h->dynindx == -1 3132 && !h->forced_local 3133 && h->root.type != bfd_link_hash_undefweak 3134 && bfd_link_pic (info)) 3135 relative_reloc = true; 3136 else 3137 SPARC_ELF_PUT_WORD (htab, output_bfd, relocation, 3138 htab->elf.sgot->contents + off); 3139 h->got.offset |= 1; 3140 } 3141 } 3142 else 3143 unresolved_reloc = false; 3144 } 3145 else 3146 { 3147 BFD_ASSERT (local_got_offsets != NULL 3148 && local_got_offsets[r_symndx] != (bfd_vma) -1); 3149 3150 off = local_got_offsets[r_symndx]; 3151 3152 /* The offset must always be a multiple of 8 on 64-bit and 3153 4 on 32-bit. We use the least significant bit to record 3154 whether we have already processed this entry. */ 3155 if ((off & 1) != 0) 3156 off &= ~1; 3157 else 3158 { 3159 /* For a local symbol in PIC mode, we need to generate a 3160 R_SPARC_RELATIVE reloc for the dynamic linker. */ 3161 if (bfd_link_pic (info)) 3162 relative_reloc = true; 3163 else 3164 SPARC_ELF_PUT_WORD (htab, output_bfd, relocation, 3165 htab->elf.sgot->contents + off); 3166 local_got_offsets[r_symndx] |= 1; 3167 } 3168 } 3169 3170 if (relative_reloc) 3171 { 3172 asection *s = htab->elf.srelgot; 3173 Elf_Internal_Rela outrel; 3174 3175 BFD_ASSERT (s != NULL); 3176 3177 outrel.r_offset = (htab->elf.sgot->output_section->vma 3178 + htab->elf.sgot->output_offset 3179 + off); 3180 outrel.r_info = SPARC_ELF_R_INFO (htab, NULL, 3181 0, R_SPARC_RELATIVE); 3182 outrel.r_addend = relocation; 3183 sparc_elf_append_rela (output_bfd, s, &outrel); 3184 /* Versions of glibc ld.so at least up to 2.26 wrongly 3185 add the section contents to the value calculated for 3186 a RELATIVE reloc. Zero the contents to work around 3187 this bug. */ 3188 relocation = 0; 3189 SPARC_ELF_PUT_WORD (htab, output_bfd, relocation, 3190 htab->elf.sgot->contents + off); 3191 } 3192 3193 relocation = htab->elf.sgot->output_offset + off - got_base; 3194 break; 3195 3196 case R_SPARC_PLT32: 3197 case R_SPARC_PLT64: 3198 if (h == NULL || h->plt.offset == (bfd_vma) -1) 3199 { 3200 r_type = (r_type == R_SPARC_PLT32) ? R_SPARC_32 : R_SPARC_64; 3201 goto r_sparc_plt32; 3202 } 3203 /* Fall through. */ 3204 3205 case R_SPARC_WPLT30: 3206 case R_SPARC_HIPLT22: 3207 case R_SPARC_LOPLT10: 3208 case R_SPARC_PCPLT32: 3209 case R_SPARC_PCPLT22: 3210 case R_SPARC_PCPLT10: 3211 r_sparc_wplt30: 3212 /* Relocation is to the entry for this symbol in the 3213 procedure linkage table. */ 3214 3215 if (! ABI_64_P (output_bfd)) 3216 { 3217 /* The Solaris native assembler will generate a WPLT30 reloc 3218 for a local symbol if you assemble a call from one 3219 section to another when using -K pic. We treat it as 3220 WDISP30. */ 3221 if (h == NULL) 3222 break; 3223 } 3224 /* PR 7027: We need similar behaviour for 64-bit binaries. */ 3225 else if (r_type == R_SPARC_WPLT30 && h == NULL) 3226 break; 3227 else 3228 { 3229 BFD_ASSERT (h != NULL); 3230 } 3231 3232 if (h->plt.offset == (bfd_vma) -1 || htab->elf.splt == NULL) 3233 { 3234 /* We didn't make a PLT entry for this symbol. This 3235 happens when statically linking PIC code, or when 3236 using -Bsymbolic. */ 3237 break; 3238 } 3239 3240 relocation = (htab->elf.splt->output_section->vma 3241 + htab->elf.splt->output_offset 3242 + h->plt.offset); 3243 unresolved_reloc = false; 3244 if (r_type == R_SPARC_PLT32 || r_type == R_SPARC_PLT64) 3245 { 3246 r_type = r_type == R_SPARC_PLT32 ? R_SPARC_32 : R_SPARC_64; 3247 is_plt = true; 3248 goto r_sparc_plt32; 3249 } 3250 break; 3251 3252 case R_SPARC_PC10: 3253 case R_SPARC_PC22: 3254 case R_SPARC_PC_HH22: 3255 case R_SPARC_PC_HM10: 3256 case R_SPARC_PC_LM22: 3257 if (h != NULL 3258 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 3259 break; 3260 /* Fall through. */ 3261 case R_SPARC_DISP8: 3262 case R_SPARC_DISP16: 3263 case R_SPARC_DISP32: 3264 case R_SPARC_DISP64: 3265 case R_SPARC_WDISP30: 3266 case R_SPARC_WDISP22: 3267 case R_SPARC_WDISP19: 3268 case R_SPARC_WDISP16: 3269 case R_SPARC_WDISP10: 3270 case R_SPARC_8: 3271 case R_SPARC_16: 3272 case R_SPARC_32: 3273 case R_SPARC_HI22: 3274 case R_SPARC_22: 3275 case R_SPARC_13: 3276 case R_SPARC_LO10: 3277 case R_SPARC_UA16: 3278 case R_SPARC_UA32: 3279 case R_SPARC_10: 3280 case R_SPARC_11: 3281 case R_SPARC_64: 3282 case R_SPARC_OLO10: 3283 case R_SPARC_HH22: 3284 case R_SPARC_HM10: 3285 case R_SPARC_LM22: 3286 case R_SPARC_7: 3287 case R_SPARC_5: 3288 case R_SPARC_6: 3289 case R_SPARC_HIX22: 3290 case R_SPARC_LOX10: 3291 case R_SPARC_H44: 3292 case R_SPARC_M44: 3293 case R_SPARC_L44: 3294 case R_SPARC_H34: 3295 case R_SPARC_UA64: 3296 r_sparc_plt32: 3297 if ((input_section->flags & SEC_ALLOC) == 0 || is_vxworks_tls) 3298 break; 3299 3300 /* Copy dynamic function pointer relocations. Don't generate 3301 dynamic relocations against resolved undefined weak symbols 3302 in PIE. */ 3303 if ((bfd_link_pic (info) 3304 && (h == NULL 3305 || !(h->root.type == bfd_link_hash_undefweak 3306 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 3307 || resolved_to_zero))) 3308 && (! howto->pc_relative 3309 || !SYMBOL_CALLS_LOCAL (info, h))) 3310 || (!bfd_link_pic (info) 3311 && h != NULL 3312 && h->dynindx != -1 3313 && !h->non_got_ref 3314 && ((h->def_dynamic 3315 && !h->def_regular) 3316 || (h->root.type == bfd_link_hash_undefweak 3317 && !resolved_to_zero) 3318 || h->root.type == bfd_link_hash_undefined))) 3319 { 3320 Elf_Internal_Rela outrel; 3321 bool skip, relocate = false; 3322 3323 /* When generating a shared object, these relocations 3324 are copied into the output file to be resolved at run 3325 time. */ 3326 3327 BFD_ASSERT (sreloc != NULL); 3328 3329 skip = false; 3330 3331 outrel.r_offset = 3332 _bfd_elf_section_offset (output_bfd, info, input_section, 3333 rel->r_offset); 3334 if (outrel.r_offset == (bfd_vma) -1) 3335 skip = true; 3336 else if (outrel.r_offset == (bfd_vma) -2) 3337 skip = true, relocate = true; 3338 outrel.r_offset += (input_section->output_section->vma 3339 + input_section->output_offset); 3340 3341 /* Optimize unaligned reloc usage now that we know where 3342 it finally resides. */ 3343 switch (r_type) 3344 { 3345 case R_SPARC_16: 3346 if (outrel.r_offset & 1) 3347 r_type = R_SPARC_UA16; 3348 break; 3349 case R_SPARC_UA16: 3350 if (!(outrel.r_offset & 1)) 3351 r_type = R_SPARC_16; 3352 break; 3353 case R_SPARC_32: 3354 if (outrel.r_offset & 3) 3355 r_type = R_SPARC_UA32; 3356 break; 3357 case R_SPARC_UA32: 3358 if (!(outrel.r_offset & 3)) 3359 r_type = R_SPARC_32; 3360 break; 3361 case R_SPARC_64: 3362 if (outrel.r_offset & 7) 3363 r_type = R_SPARC_UA64; 3364 break; 3365 case R_SPARC_UA64: 3366 if (!(outrel.r_offset & 7)) 3367 r_type = R_SPARC_64; 3368 break; 3369 case R_SPARC_DISP8: 3370 case R_SPARC_DISP16: 3371 case R_SPARC_DISP32: 3372 case R_SPARC_DISP64: 3373 /* If the symbol is not dynamic, we should not keep 3374 a dynamic relocation. But an .rela.* slot has been 3375 allocated for it, output R_SPARC_NONE. 3376 FIXME: Add code tracking needed dynamic relocs as 3377 e.g. i386 has. */ 3378 if (h->dynindx == -1) 3379 skip = true, relocate = true; 3380 break; 3381 } 3382 3383 if (skip) 3384 memset (&outrel, 0, sizeof outrel); 3385 /* h->dynindx may be -1 if the symbol was marked to 3386 become local. */ 3387 else if (h != NULL 3388 && h->dynindx != -1 3389 && (_bfd_sparc_elf_howto_table[r_type].pc_relative 3390 || !bfd_link_pic (info) 3391 || !SYMBOLIC_BIND (info, h) 3392 || !h->def_regular)) 3393 { 3394 outrel.r_info = SPARC_ELF_R_INFO (htab, rel, h->dynindx, r_type); 3395 outrel.r_addend = rel->r_addend; 3396 } 3397 else 3398 { 3399 if ( (!ABI_64_P (output_bfd) && r_type == R_SPARC_32) 3400 || (ABI_64_P (output_bfd) && r_type == R_SPARC_64)) 3401 { 3402 outrel.r_info = SPARC_ELF_R_INFO (htab, NULL, 3403 0, R_SPARC_RELATIVE); 3404 outrel.r_addend = relocation + rel->r_addend; 3405 } 3406 else 3407 { 3408 long indx; 3409 3410 outrel.r_addend = relocation + rel->r_addend; 3411 3412 if (is_plt) 3413 sec = htab->elf.splt; 3414 3415 if (bfd_is_abs_section (sec)) 3416 indx = 0; 3417 else if (sec == NULL || sec->owner == NULL) 3418 { 3419 bfd_set_error (bfd_error_bad_value); 3420 return false; 3421 } 3422 else 3423 { 3424 asection *osec; 3425 3426 /* We are turning this relocation into one 3427 against a section symbol. It would be 3428 proper to subtract the symbol's value, 3429 osec->vma, from the emitted reloc addend, 3430 but ld.so expects buggy relocs. */ 3431 osec = sec->output_section; 3432 indx = elf_section_data (osec)->dynindx; 3433 3434 if (indx == 0) 3435 { 3436 osec = htab->elf.text_index_section; 3437 indx = elf_section_data (osec)->dynindx; 3438 } 3439 3440 /* FIXME: we really should be able to link non-pic 3441 shared libraries. */ 3442 if (indx == 0) 3443 { 3444 BFD_FAIL (); 3445 _bfd_error_handler 3446 (_("%pB: probably compiled without -fPIC?"), 3447 input_bfd); 3448 bfd_set_error (bfd_error_bad_value); 3449 return false; 3450 } 3451 } 3452 3453 outrel.r_info = SPARC_ELF_R_INFO (htab, rel, indx, 3454 r_type); 3455 } 3456 } 3457 3458 sparc_elf_append_rela (output_bfd, sreloc, &outrel); 3459 3460 /* This reloc will be computed at runtime, so there's no 3461 need to do anything now. */ 3462 if (! relocate) 3463 continue; 3464 } 3465 break; 3466 3467 case R_SPARC_TLS_GD_HI22: 3468 case R_SPARC_TLS_GD_LO10: 3469 case R_SPARC_TLS_IE_HI22: 3470 case R_SPARC_TLS_IE_LO10: 3471 r_type = sparc_elf_tls_transition (info, input_bfd, r_type, 3472 h == NULL || h->dynindx == -1); 3473 if (r_type == R_SPARC_REV32) 3474 break; 3475 if (h != NULL) 3476 tls_type = _bfd_sparc_elf_hash_entry (h)->tls_type; 3477 else if (local_got_offsets) 3478 tls_type = _bfd_sparc_elf_local_got_tls_type (input_bfd) [r_symndx]; 3479 else if (h != NULL) 3480 { 3481 tls_type = _bfd_sparc_elf_hash_entry(h)->tls_type; 3482 if (!bfd_link_dll (info) 3483 && h->dynindx == -1 3484 && tls_type == GOT_TLS_IE) 3485 switch (SPARC_ELF_R_TYPE (rel->r_info)) 3486 { 3487 case R_SPARC_TLS_GD_HI22: 3488 case R_SPARC_TLS_IE_HI22: 3489 r_type = R_SPARC_TLS_LE_HIX22; 3490 break; 3491 default: 3492 r_type = R_SPARC_TLS_LE_LOX10; 3493 break; 3494 } 3495 } 3496 else 3497 tls_type = GOT_UNKNOWN; 3498 if (tls_type == GOT_TLS_IE) 3499 switch (r_type) 3500 { 3501 case R_SPARC_TLS_GD_HI22: 3502 r_type = R_SPARC_TLS_IE_HI22; 3503 break; 3504 case R_SPARC_TLS_GD_LO10: 3505 r_type = R_SPARC_TLS_IE_LO10; 3506 break; 3507 } 3508 3509 if (r_type == R_SPARC_TLS_LE_HIX22) 3510 { 3511 relocation = tpoff (info, relocation); 3512 break; 3513 } 3514 if (r_type == R_SPARC_TLS_LE_LOX10) 3515 { 3516 /* Change add into xor. */ 3517 relocation = tpoff (info, relocation); 3518 bfd_put_32 (output_bfd, (bfd_get_32 (input_bfd, 3519 contents + rel->r_offset) 3520 | 0x80182000), contents + rel->r_offset); 3521 break; 3522 } 3523 3524 if (h != NULL) 3525 { 3526 off = h->got.offset; 3527 h->got.offset |= 1; 3528 } 3529 else 3530 { 3531 BFD_ASSERT (local_got_offsets != NULL); 3532 off = local_got_offsets[r_symndx]; 3533 local_got_offsets[r_symndx] |= 1; 3534 } 3535 3536 r_sparc_tlsldm: 3537 if (htab->elf.sgot == NULL) 3538 abort (); 3539 3540 if ((off & 1) != 0) 3541 off &= ~1; 3542 else 3543 { 3544 Elf_Internal_Rela outrel; 3545 int dr_type, indx; 3546 3547 if (htab->elf.srelgot == NULL) 3548 abort (); 3549 3550 SPARC_ELF_PUT_WORD (htab, output_bfd, 0, 3551 htab->elf.sgot->contents + off); 3552 outrel.r_offset = (htab->elf.sgot->output_section->vma 3553 + htab->elf.sgot->output_offset + off); 3554 indx = h && h->dynindx != -1 ? h->dynindx : 0; 3555 if (r_type == R_SPARC_TLS_IE_HI22 3556 || r_type == R_SPARC_TLS_IE_LO10) 3557 dr_type = SPARC_ELF_TPOFF_RELOC (htab); 3558 else 3559 dr_type = SPARC_ELF_DTPMOD_RELOC (htab); 3560 if (dr_type == SPARC_ELF_TPOFF_RELOC (htab) && indx == 0) 3561 outrel.r_addend = relocation - dtpoff_base (info); 3562 else 3563 outrel.r_addend = 0; 3564 outrel.r_info = SPARC_ELF_R_INFO (htab, NULL, indx, dr_type); 3565 sparc_elf_append_rela (output_bfd, htab->elf.srelgot, &outrel); 3566 3567 if (r_type == R_SPARC_TLS_GD_HI22 3568 || r_type == R_SPARC_TLS_GD_LO10) 3569 { 3570 if (indx == 0) 3571 { 3572 BFD_ASSERT (! unresolved_reloc); 3573 SPARC_ELF_PUT_WORD (htab, output_bfd, 3574 relocation - dtpoff_base (info), 3575 (htab->elf.sgot->contents + off 3576 + SPARC_ELF_WORD_BYTES (htab))); 3577 } 3578 else 3579 { 3580 SPARC_ELF_PUT_WORD (htab, output_bfd, 0, 3581 (htab->elf.sgot->contents + off 3582 + SPARC_ELF_WORD_BYTES (htab))); 3583 outrel.r_info = SPARC_ELF_R_INFO (htab, NULL, indx, 3584 SPARC_ELF_DTPOFF_RELOC (htab)); 3585 outrel.r_offset += SPARC_ELF_WORD_BYTES (htab); 3586 sparc_elf_append_rela (output_bfd, htab->elf.srelgot, 3587 &outrel); 3588 } 3589 } 3590 else if (dr_type == SPARC_ELF_DTPMOD_RELOC (htab)) 3591 { 3592 SPARC_ELF_PUT_WORD (htab, output_bfd, 0, 3593 (htab->elf.sgot->contents + off 3594 + SPARC_ELF_WORD_BYTES (htab))); 3595 } 3596 } 3597 3598 if (off >= (bfd_vma) -2) 3599 abort (); 3600 3601 relocation = htab->elf.sgot->output_offset + off - got_base; 3602 unresolved_reloc = false; 3603 howto = _bfd_sparc_elf_howto_table + r_type; 3604 break; 3605 3606 case R_SPARC_TLS_LDM_HI22: 3607 case R_SPARC_TLS_LDM_LO10: 3608 /* LD -> LE */ 3609 if (bfd_link_executable (info)) 3610 { 3611 bfd_put_32 (output_bfd, SPARC_NOP, contents + rel->r_offset); 3612 continue; 3613 } 3614 off = htab->tls_ldm_got.offset; 3615 htab->tls_ldm_got.offset |= 1; 3616 goto r_sparc_tlsldm; 3617 3618 case R_SPARC_TLS_LDO_HIX22: 3619 case R_SPARC_TLS_LDO_LOX10: 3620 /* LD -> LE */ 3621 if (bfd_link_executable (info)) 3622 { 3623 if (r_type == R_SPARC_TLS_LDO_HIX22) 3624 r_type = R_SPARC_TLS_LE_HIX22; 3625 else 3626 r_type = R_SPARC_TLS_LE_LOX10; 3627 } 3628 else 3629 { 3630 relocation -= dtpoff_base (info); 3631 break; 3632 } 3633 /* Fall through. */ 3634 3635 case R_SPARC_TLS_LE_HIX22: 3636 case R_SPARC_TLS_LE_LOX10: 3637 if (!bfd_link_executable (info)) 3638 { 3639 Elf_Internal_Rela outrel; 3640 bfd_vma offset 3641 = _bfd_elf_section_offset (output_bfd, info, input_section, 3642 rel->r_offset); 3643 if (offset == (bfd_vma) -1 || offset == (bfd_vma) -2) 3644 memset (&outrel, 0, sizeof outrel); 3645 else 3646 { 3647 outrel.r_offset = offset 3648 + input_section->output_section->vma 3649 + input_section->output_offset; 3650 outrel.r_info = SPARC_ELF_R_INFO (htab, NULL, 0, r_type); 3651 outrel.r_addend 3652 = relocation - dtpoff_base (info) + rel->r_addend; 3653 } 3654 3655 BFD_ASSERT (sreloc != NULL); 3656 sparc_elf_append_rela (output_bfd, sreloc, &outrel); 3657 continue; 3658 } 3659 relocation = tpoff (info, relocation); 3660 break; 3661 3662 case R_SPARC_TLS_LDM_CALL: 3663 /* LD -> LE */ 3664 if (bfd_link_executable (info)) 3665 { 3666 /* mov %g0, %o0 */ 3667 bfd_put_32 (output_bfd, 0x90100000, contents + rel->r_offset); 3668 continue; 3669 } 3670 /* Fall through */ 3671 3672 case R_SPARC_TLS_GD_CALL: 3673 if (h != NULL) 3674 tls_type = _bfd_sparc_elf_hash_entry (h)->tls_type; 3675 else if (local_got_offsets) 3676 tls_type = _bfd_sparc_elf_local_got_tls_type (input_bfd) [r_symndx]; 3677 else if (h != NULL) 3678 tls_type = _bfd_sparc_elf_hash_entry(h)->tls_type; 3679 else 3680 tls_type = GOT_UNKNOWN; 3681 /* GD -> IE or LE */ 3682 if (bfd_link_executable (info) 3683 || (r_type == R_SPARC_TLS_GD_CALL && tls_type == GOT_TLS_IE)) 3684 { 3685 Elf_Internal_Rela *rel2; 3686 bfd_vma insn; 3687 3688 /* GD -> LE */ 3689 if (bfd_link_executable (info) && (h == NULL || h->dynindx == -1)) 3690 { 3691 bfd_put_32 (output_bfd, SPARC_NOP, contents + rel->r_offset); 3692 continue; 3693 } 3694 3695 /* GD -> IE */ 3696 if (rel + 1 < relend 3697 && SPARC_ELF_R_TYPE (rel[1].r_info) == R_SPARC_TLS_GD_ADD 3698 && rel[1].r_offset == rel->r_offset + 4 3699 && SPARC_ELF_R_SYMNDX (htab, rel[1].r_info) == r_symndx 3700 && (((insn = bfd_get_32 (input_bfd, 3701 contents + rel[1].r_offset)) 3702 >> 25) & 0x1f) == 8) 3703 { 3704 /* We have 3705 call __tls_get_addr, %tgd_call(foo) 3706 add %reg1, %reg2, %o0, %tgd_add(foo) 3707 and change it into IE: 3708 {ld,ldx} [%reg1 + %reg2], %o0, %tie_ldx(foo) 3709 add %g7, %o0, %o0, %tie_add(foo). 3710 add is 0x80000000 | (rd << 25) | (rs1 << 14) | rs2, 3711 ld is 0xc0000000 | (rd << 25) | (rs1 << 14) | rs2, 3712 ldx is 0xc0580000 | (rd << 25) | (rs1 << 14) | rs2. */ 3713 bfd_put_32 (output_bfd, insn | (ABI_64_P (output_bfd) ? 0xc0580000 : 0xc0000000), 3714 contents + rel->r_offset); 3715 bfd_put_32 (output_bfd, 0x9001c008, 3716 contents + rel->r_offset + 4); 3717 rel++; 3718 continue; 3719 } 3720 3721 /* We cannot just overwrite the delay slot instruction, 3722 as it might be what puts the %o0 argument to 3723 __tls_get_addr into place. So we have to transpose 3724 the delay slot with the add we patch in. */ 3725 insn = bfd_get_32 (input_bfd, contents + rel->r_offset + 4); 3726 bfd_put_32 (output_bfd, insn, 3727 contents + rel->r_offset); 3728 bfd_put_32 (output_bfd, 0x9001c008, 3729 contents + rel->r_offset + 4); 3730 3731 rel2 = rel; 3732 while ((rel2 = sparc_elf_find_reloc_at_ofs (rel2 + 1, relend, 3733 rel->r_offset + 4)) 3734 != NULL) 3735 { 3736 /* If the instruction we moved has a relocation attached to 3737 it, adjust the offset so that it will apply to the correct 3738 instruction. */ 3739 rel2->r_offset -= 4; 3740 } 3741 continue; 3742 } 3743 3744 h = (struct elf_link_hash_entry *) 3745 bfd_link_hash_lookup (info->hash, "__tls_get_addr", false, 3746 false, true); 3747 BFD_ASSERT (h != NULL); 3748 r_type = R_SPARC_WPLT30; 3749 howto = _bfd_sparc_elf_howto_table + r_type; 3750 goto r_sparc_wplt30; 3751 3752 case R_SPARC_TLS_GD_ADD: 3753 if (h != NULL) 3754 tls_type = _bfd_sparc_elf_hash_entry (h)->tls_type; 3755 else if (local_got_offsets) 3756 tls_type = _bfd_sparc_elf_local_got_tls_type (input_bfd) [r_symndx]; 3757 else 3758 tls_type = GOT_UNKNOWN; 3759 /* GD -> IE or LE */ 3760 if (bfd_link_executable (info) || tls_type == GOT_TLS_IE) 3761 { 3762 /* add %reg1, %reg2, %reg3, %tgd_add(foo) 3763 changed into IE: 3764 {ld,ldx} [%reg1 + %reg2], %reg3, %tie_ldx(foo) 3765 or LE: 3766 add %g7, %reg2, %reg3. */ 3767 bfd_vma insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 3768 if (bfd_link_executable (info) && (h == NULL || h->dynindx == -1)) 3769 relocation = (insn & ~0x7c000) | 0x1c000; 3770 else 3771 relocation = insn | (ABI_64_P (output_bfd) ? 0xc0580000 : 0xc0000000); 3772 bfd_put_32 (output_bfd, relocation, contents + rel->r_offset); 3773 } 3774 continue; 3775 3776 case R_SPARC_TLS_LDM_ADD: 3777 /* LD -> LE */ 3778 if (bfd_link_executable (info)) 3779 bfd_put_32 (output_bfd, SPARC_NOP, contents + rel->r_offset); 3780 continue; 3781 3782 case R_SPARC_TLS_LDO_ADD: 3783 /* LD -> LE */ 3784 if (bfd_link_executable (info)) 3785 { 3786 /* Change rs1 into %g7. */ 3787 bfd_vma insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 3788 insn = (insn & ~0x7c000) | 0x1c000; 3789 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 3790 } 3791 continue; 3792 3793 case R_SPARC_TLS_IE_LD: 3794 case R_SPARC_TLS_IE_LDX: 3795 /* IE -> LE */ 3796 if (bfd_link_executable (info) && (h == NULL || h->dynindx == -1)) 3797 { 3798 bfd_vma insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 3799 int rs2 = insn & 0x1f; 3800 int rd = (insn >> 25) & 0x1f; 3801 3802 if (rs2 == rd) 3803 relocation = SPARC_NOP; 3804 else 3805 relocation = 0x80100000 | (insn & 0x3e00001f); 3806 bfd_put_32 (output_bfd, relocation, contents + rel->r_offset); 3807 } 3808 continue; 3809 3810 case R_SPARC_TLS_IE_ADD: 3811 /* Totally useless relocation. */ 3812 continue; 3813 3814 case R_SPARC_TLS_DTPOFF32: 3815 case R_SPARC_TLS_DTPOFF64: 3816 relocation -= dtpoff_base (info); 3817 break; 3818 3819 default: 3820 break; 3821 } 3822 3823 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections 3824 because such sections are not SEC_ALLOC and thus ld.so will 3825 not process them. */ 3826 if (unresolved_reloc 3827 && !((input_section->flags & SEC_DEBUGGING) != 0 3828 && h->def_dynamic) 3829 && _bfd_elf_section_offset (output_bfd, info, input_section, 3830 rel->r_offset) != (bfd_vma) -1) 3831 _bfd_error_handler 3832 /* xgettext:c-format */ 3833 (_("%pB(%pA+%#" PRIx64 "): " 3834 "unresolvable %s relocation against symbol `%s'"), 3835 input_bfd, 3836 input_section, 3837 (uint64_t) rel->r_offset, 3838 howto->name, 3839 h->root.root.string); 3840 3841 r = bfd_reloc_continue; 3842 if (r_type == R_SPARC_OLO10) 3843 { 3844 bfd_vma x; 3845 3846 if (! ABI_64_P (output_bfd)) 3847 abort (); 3848 3849 relocation += rel->r_addend; 3850 relocation = (relocation & 0x3ff) + ELF64_R_TYPE_DATA (rel->r_info); 3851 3852 x = bfd_get_32 (input_bfd, contents + rel->r_offset); 3853 x = (x & ~(bfd_vma) 0x1fff) | (relocation & 0x1fff); 3854 bfd_put_32 (input_bfd, x, contents + rel->r_offset); 3855 3856 r = bfd_check_overflow (howto->complain_on_overflow, 3857 howto->bitsize, howto->rightshift, 3858 bfd_arch_bits_per_address (input_bfd), 3859 relocation); 3860 } 3861 else if (r_type == R_SPARC_WDISP16) 3862 { 3863 bfd_vma x; 3864 3865 relocation += rel->r_addend; 3866 relocation -= (input_section->output_section->vma 3867 + input_section->output_offset); 3868 relocation -= rel->r_offset; 3869 3870 x = bfd_get_32 (input_bfd, contents + rel->r_offset); 3871 x |= ((((relocation >> 2) & 0xc000) << 6) 3872 | ((relocation >> 2) & 0x3fff)); 3873 bfd_put_32 (input_bfd, x, contents + rel->r_offset); 3874 3875 r = bfd_check_overflow (howto->complain_on_overflow, 3876 howto->bitsize, howto->rightshift, 3877 bfd_arch_bits_per_address (input_bfd), 3878 relocation); 3879 } 3880 else if (r_type == R_SPARC_WDISP10) 3881 { 3882 bfd_vma x; 3883 3884 relocation += rel->r_addend; 3885 relocation -= (input_section->output_section->vma 3886 + input_section->output_offset); 3887 relocation -= rel->r_offset; 3888 3889 x = bfd_get_32 (input_bfd, contents + rel->r_offset); 3890 x |= ((((relocation >> 2) & 0x300) << 11) 3891 | (((relocation >> 2) & 0xff) << 5)); 3892 bfd_put_32 (input_bfd, x, contents + rel->r_offset); 3893 3894 r = bfd_check_overflow (howto->complain_on_overflow, 3895 howto->bitsize, howto->rightshift, 3896 bfd_arch_bits_per_address (input_bfd), 3897 relocation); 3898 } 3899 else if (r_type == R_SPARC_REV32) 3900 { 3901 bfd_vma x; 3902 3903 relocation = relocation + rel->r_addend; 3904 3905 x = bfd_get_32 (input_bfd, contents + rel->r_offset); 3906 x = x + relocation; 3907 bfd_putl32 (/*input_bfd,*/ x, contents + rel->r_offset); 3908 r = bfd_reloc_ok; 3909 } 3910 else if (r_type == R_SPARC_TLS_LDO_HIX22 3911 || r_type == R_SPARC_TLS_LE_HIX22) 3912 { 3913 bfd_vma x; 3914 3915 relocation += rel->r_addend; 3916 if (r_type == R_SPARC_TLS_LE_HIX22) 3917 relocation ^= MINUS_ONE; 3918 3919 x = bfd_get_32 (input_bfd, contents + rel->r_offset); 3920 x = (x & ~(bfd_vma) 0x3fffff) | ((relocation >> 10) & 0x3fffff); 3921 bfd_put_32 (input_bfd, x, contents + rel->r_offset); 3922 r = bfd_reloc_ok; 3923 } 3924 else if (r_type == R_SPARC_TLS_LDO_LOX10 3925 || r_type == R_SPARC_TLS_LE_LOX10) 3926 { 3927 bfd_vma x; 3928 3929 relocation += rel->r_addend; 3930 relocation &= 0x3ff; 3931 if (r_type == R_SPARC_TLS_LE_LOX10) 3932 relocation |= 0x1c00; 3933 3934 x = bfd_get_32 (input_bfd, contents + rel->r_offset); 3935 x = (x & ~(bfd_vma) 0x1fff) | relocation; 3936 bfd_put_32 (input_bfd, x, contents + rel->r_offset); 3937 3938 r = bfd_reloc_ok; 3939 } 3940 else if (r_type == R_SPARC_HIX22 3941 || r_type == R_SPARC_GOTDATA_HIX22 3942 || r_type == R_SPARC_GOTDATA_OP_HIX22) 3943 { 3944 bfd_vma x; 3945 3946 relocation += rel->r_addend; 3947 if (r_type == R_SPARC_HIX22 3948 || (bfd_signed_vma) relocation < 0) 3949 relocation = relocation ^ MINUS_ONE; 3950 3951 x = bfd_get_32 (input_bfd, contents + rel->r_offset); 3952 x = (x & ~(bfd_vma) 0x3fffff) | ((relocation >> 10) & 0x3fffff); 3953 bfd_put_32 (input_bfd, x, contents + rel->r_offset); 3954 3955 r = bfd_check_overflow (howto->complain_on_overflow, 3956 howto->bitsize, howto->rightshift, 3957 bfd_arch_bits_per_address (input_bfd), 3958 relocation); 3959 } 3960 else if (r_type == R_SPARC_LOX10 3961 || r_type == R_SPARC_GOTDATA_LOX10 3962 || r_type == R_SPARC_GOTDATA_OP_LOX10) 3963 { 3964 bfd_vma x; 3965 3966 relocation += rel->r_addend; 3967 if (r_type == R_SPARC_LOX10 3968 || (bfd_signed_vma) relocation < 0) 3969 relocation = (relocation & 0x3ff) | 0x1c00; 3970 else 3971 relocation = (relocation & 0x3ff); 3972 3973 x = bfd_get_32 (input_bfd, contents + rel->r_offset); 3974 x = (x & ~(bfd_vma) 0x1fff) | relocation; 3975 bfd_put_32 (input_bfd, x, contents + rel->r_offset); 3976 3977 r = bfd_reloc_ok; 3978 } 3979 else if ((r_type == R_SPARC_WDISP30 || r_type == R_SPARC_WPLT30) 3980 && sec_do_relax (input_section) 3981 && rel->r_offset + 4 < input_section->size) 3982 { 3983#define G0 0 3984#define O7 15 3985#define XCC (2 << 20) 3986#define COND(x) (((x)&0xf)<<25) 3987#define CONDA COND(0x8) 3988#define INSN_BPA (F2(0,1) | CONDA | BPRED | XCC) 3989#define INSN_BA (F2(0,2) | CONDA) 3990#define INSN_OR F3(2, 0x2, 0) 3991#define INSN_NOP F2(0,4) 3992 3993 bfd_vma x, y; 3994 3995 /* If the instruction is a call with either: 3996 restore 3997 arithmetic instruction with rd == %o7 3998 where rs1 != %o7 and rs2 if it is register != %o7 3999 then we can optimize if the call destination is near 4000 by changing the call into a branch always. */ 4001 x = bfd_get_32 (input_bfd, contents + rel->r_offset); 4002 y = bfd_get_32 (input_bfd, contents + rel->r_offset + 4); 4003 if ((x & OP(~0)) == OP(1) && (y & OP(~0)) == OP(2)) 4004 { 4005 if (((y & OP3(~0)) == OP3(0x3d) /* restore */ 4006 || ((y & OP3(0x28)) == 0 /* arithmetic */ 4007 && (y & RD(~0)) == RD(O7))) 4008 && (y & RS1(~0)) != RS1(O7) 4009 && ((y & F3I(~0)) 4010 || (y & RS2(~0)) != RS2(O7))) 4011 { 4012 bfd_vma reloc; 4013 4014 reloc = relocation + rel->r_addend - rel->r_offset; 4015 reloc -= (input_section->output_section->vma 4016 + input_section->output_offset); 4017 4018 /* Ensure the branch fits into simm22. */ 4019 if ((reloc & 3) == 0 4020 && ((reloc & ~(bfd_vma)0x7fffff) == 0 4021 || ((reloc | 0x7fffff) == ~(bfd_vma)0))) 4022 { 4023 reloc >>= 2; 4024 4025 /* Check whether it fits into simm19. */ 4026 if (((reloc & 0x3c0000) == 0 4027 || (reloc & 0x3c0000) == 0x3c0000) 4028 && (ABI_64_P (output_bfd) 4029 || elf_elfheader (output_bfd)->e_flags & EF_SPARC_32PLUS)) 4030 x = INSN_BPA | (reloc & 0x7ffff); /* ba,pt %xcc */ 4031 else 4032 x = INSN_BA | (reloc & 0x3fffff); /* ba */ 4033 bfd_put_32 (input_bfd, x, contents + rel->r_offset); 4034 r = bfd_reloc_ok; 4035 if (rel->r_offset >= 4 4036 && (y & (0xffffffff ^ RS1(~0))) 4037 == (INSN_OR | RD(O7) | RS2(G0))) 4038 { 4039 bfd_vma z; 4040 unsigned int reg; 4041 4042 z = bfd_get_32 (input_bfd, 4043 contents + rel->r_offset - 4); 4044 if ((z & (0xffffffff ^ RD(~0))) 4045 != (INSN_OR | RS1(O7) | RS2(G0))) 4046 continue; 4047 4048 /* The sequence was 4049 or %o7, %g0, %rN 4050 call foo 4051 or %rN, %g0, %o7 4052 4053 If call foo was replaced with ba, replace 4054 or %rN, %g0, %o7 with nop. */ 4055 4056 reg = (y & RS1(~0)) >> 14; 4057 if (reg != ((z & RD(~0)) >> 25) 4058 || reg == G0 || reg == O7) 4059 continue; 4060 4061 bfd_put_32 (input_bfd, (bfd_vma) INSN_NOP, 4062 contents + rel->r_offset + 4); 4063 } 4064 4065 } 4066 } 4067 } 4068 } 4069 4070 if (r == bfd_reloc_continue) 4071 { 4072 do_relocation: 4073 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 4074 contents, rel->r_offset, 4075 relocation, rel->r_addend); 4076 } 4077 if (r != bfd_reloc_ok) 4078 { 4079 switch (r) 4080 { 4081 default: 4082 case bfd_reloc_outofrange: 4083 abort (); 4084 case bfd_reloc_overflow: 4085 { 4086 const char *name; 4087 4088 /* The Solaris native linker silently disregards overflows. 4089 We don't, but this breaks stabs debugging info, whose 4090 relocations are only 32-bits wide. Ignore overflows in 4091 this case and also for discarded entries. */ 4092 if ((r_type == R_SPARC_32 4093 || r_type == R_SPARC_UA32 4094 || r_type == R_SPARC_DISP32) 4095 && (((input_section->flags & SEC_DEBUGGING) != 0 4096 && strcmp (bfd_section_name (input_section), 4097 ".stab") == 0) 4098 || _bfd_elf_section_offset (output_bfd, info, 4099 input_section, 4100 rel->r_offset) 4101 == (bfd_vma)-1)) 4102 break; 4103 4104 if (h != NULL) 4105 { 4106 /* Assume this is a call protected by other code that 4107 detect the symbol is undefined. If this is the case, 4108 we can safely ignore the overflow. If not, the 4109 program is hosed anyway, and a little warning isn't 4110 going to help. */ 4111 if (h->root.type == bfd_link_hash_undefweak 4112 && howto->pc_relative) 4113 break; 4114 4115 name = NULL; 4116 } 4117 else 4118 { 4119 name = bfd_elf_string_from_elf_section (input_bfd, 4120 symtab_hdr->sh_link, 4121 sym->st_name); 4122 if (name == NULL) 4123 return false; 4124 if (*name == '\0') 4125 name = bfd_section_name (sec); 4126 } 4127 (*info->callbacks->reloc_overflow) 4128 (info, (h ? &h->root : NULL), name, howto->name, 4129 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 4130 } 4131 break; 4132 } 4133 } 4134 } 4135 4136 return true; 4137} 4138 4139/* Build a VxWorks PLT entry. PLT_INDEX is the index of the PLT entry 4140 and PLT_OFFSET is the byte offset from the start of .plt. GOT_OFFSET 4141 is the offset of the associated .got.plt entry from 4142 _GLOBAL_OFFSET_TABLE_. */ 4143 4144static void 4145sparc_vxworks_build_plt_entry (bfd *output_bfd, struct bfd_link_info *info, 4146 bfd_vma plt_offset, bfd_vma plt_index, 4147 bfd_vma got_offset) 4148{ 4149 bfd_vma got_base; 4150 const bfd_vma *plt_entry; 4151 struct _bfd_sparc_elf_link_hash_table *htab; 4152 bfd_byte *loc; 4153 Elf_Internal_Rela rela; 4154 4155 htab = _bfd_sparc_elf_hash_table (info); 4156 BFD_ASSERT (htab != NULL); 4157 4158 if (bfd_link_pic (info)) 4159 { 4160 plt_entry = sparc_vxworks_shared_plt_entry; 4161 got_base = 0; 4162 } 4163 else 4164 { 4165 plt_entry = sparc_vxworks_exec_plt_entry; 4166 got_base = (htab->elf.hgot->root.u.def.value 4167 + htab->elf.hgot->root.u.def.section->output_offset 4168 + htab->elf.hgot->root.u.def.section->output_section->vma); 4169 } 4170 4171 /* Fill in the entry in the procedure linkage table. */ 4172 bfd_put_32 (output_bfd, plt_entry[0] + ((got_base + got_offset) >> 10), 4173 htab->elf.splt->contents + plt_offset); 4174 bfd_put_32 (output_bfd, plt_entry[1] + ((got_base + got_offset) & 0x3ff), 4175 htab->elf.splt->contents + plt_offset + 4); 4176 bfd_put_32 (output_bfd, plt_entry[2], 4177 htab->elf.splt->contents + plt_offset + 8); 4178 bfd_put_32 (output_bfd, plt_entry[3], 4179 htab->elf.splt->contents + plt_offset + 12); 4180 bfd_put_32 (output_bfd, plt_entry[4], 4181 htab->elf.splt->contents + plt_offset + 16); 4182 bfd_put_32 (output_bfd, plt_entry[5] + (plt_index >> 10), 4183 htab->elf.splt->contents + plt_offset + 20); 4184 /* PC-relative displacement for a branch to the start of 4185 the PLT section. */ 4186 bfd_put_32 (output_bfd, plt_entry[6] + (((-plt_offset - 24) >> 2) 4187 & 0x003fffff), 4188 htab->elf.splt->contents + plt_offset + 24); 4189 bfd_put_32 (output_bfd, plt_entry[7] + (plt_index & 0x3ff), 4190 htab->elf.splt->contents + plt_offset + 28); 4191 4192 /* Fill in the .got.plt entry, pointing initially at the 4193 second half of the PLT entry. */ 4194 BFD_ASSERT (htab->elf.sgotplt != NULL); 4195 bfd_put_32 (output_bfd, 4196 htab->elf.splt->output_section->vma 4197 + htab->elf.splt->output_offset 4198 + plt_offset + 20, 4199 htab->elf.sgotplt->contents + got_offset); 4200 4201 /* Add relocations to .rela.plt.unloaded. */ 4202 if (!bfd_link_pic (info)) 4203 { 4204 loc = (htab->srelplt2->contents 4205 + (2 + 3 * plt_index) * sizeof (Elf32_External_Rela)); 4206 4207 /* Relocate the initial sethi. */ 4208 rela.r_offset = (htab->elf.splt->output_section->vma 4209 + htab->elf.splt->output_offset 4210 + plt_offset); 4211 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_HI22); 4212 rela.r_addend = got_offset; 4213 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 4214 loc += sizeof (Elf32_External_Rela); 4215 4216 /* Likewise the following or. */ 4217 rela.r_offset += 4; 4218 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_LO10); 4219 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 4220 loc += sizeof (Elf32_External_Rela); 4221 4222 /* Relocate the .got.plt entry. */ 4223 rela.r_offset = (htab->elf.sgotplt->output_section->vma 4224 + htab->elf.sgotplt->output_offset 4225 + got_offset); 4226 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_SPARC_32); 4227 rela.r_addend = plt_offset + 20; 4228 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 4229 } 4230} 4231 4232/* Finish up dynamic symbol handling. We set the contents of various 4233 dynamic sections here. */ 4234 4235bool 4236_bfd_sparc_elf_finish_dynamic_symbol (bfd *output_bfd, 4237 struct bfd_link_info *info, 4238 struct elf_link_hash_entry *h, 4239 Elf_Internal_Sym *sym) 4240{ 4241 struct _bfd_sparc_elf_link_hash_table *htab; 4242 const struct elf_backend_data *bed; 4243 struct _bfd_sparc_elf_link_hash_entry *eh; 4244 bool resolved_to_zero; 4245 4246 htab = _bfd_sparc_elf_hash_table (info); 4247 BFD_ASSERT (htab != NULL); 4248 bed = get_elf_backend_data (output_bfd); 4249 4250 eh = (struct _bfd_sparc_elf_link_hash_entry *) h; 4251 4252 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for 4253 resolved undefined weak symbols in executable so that their 4254 references have value 0 at run-time. */ 4255 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); 4256 4257 if (h->plt.offset != (bfd_vma) -1) 4258 { 4259 asection *splt; 4260 asection *srela; 4261 Elf_Internal_Rela rela; 4262 bfd_byte *loc; 4263 bfd_vma r_offset, got_offset; 4264 int rela_index; 4265 4266 /* When building a static executable, use .iplt and 4267 .rela.iplt sections for STT_GNU_IFUNC symbols. */ 4268 if (htab->elf.splt != NULL) 4269 { 4270 splt = htab->elf.splt; 4271 srela = htab->elf.srelplt; 4272 } 4273 else 4274 { 4275 splt = htab->elf.iplt; 4276 srela = htab->elf.irelplt; 4277 } 4278 4279 if (splt == NULL || srela == NULL) 4280 abort (); 4281 4282 /* Fill in the entry in the .rela.plt section. */ 4283 if (htab->elf.target_os == is_vxworks) 4284 { 4285 /* Work out the index of this PLT entry. */ 4286 rela_index = ((h->plt.offset - htab->plt_header_size) 4287 / htab->plt_entry_size); 4288 4289 /* Calculate the offset of the associated .got.plt entry. 4290 The first three entries are reserved. */ 4291 got_offset = (rela_index + 3) * 4; 4292 4293 sparc_vxworks_build_plt_entry (output_bfd, info, h->plt.offset, 4294 rela_index, got_offset); 4295 4296 4297 /* On VxWorks, the relocation points to the .got.plt entry, 4298 not the .plt entry. */ 4299 rela.r_offset = (htab->elf.sgotplt->output_section->vma 4300 + htab->elf.sgotplt->output_offset 4301 + got_offset); 4302 rela.r_addend = 0; 4303 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, h->dynindx, 4304 R_SPARC_JMP_SLOT); 4305 } 4306 else 4307 { 4308 bool ifunc = false; 4309 4310 /* Fill in the entry in the procedure linkage table. */ 4311 rela_index = SPARC_ELF_BUILD_PLT_ENTRY (htab, output_bfd, splt, 4312 h->plt.offset, splt->size, 4313 &r_offset); 4314 4315 if (h == NULL 4316 || h->dynindx == -1 4317 || ((bfd_link_executable (info) 4318 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 4319 && h->def_regular 4320 && h->type == STT_GNU_IFUNC)) 4321 { 4322 ifunc = true; 4323 BFD_ASSERT (h == NULL 4324 || (h->type == STT_GNU_IFUNC 4325 && h->def_regular 4326 && (h->root.type == bfd_link_hash_defined 4327 || h->root.type == bfd_link_hash_defweak))); 4328 } 4329 4330 rela.r_offset = r_offset 4331 + (splt->output_section->vma + splt->output_offset); 4332 if (ABI_64_P (output_bfd) 4333 && h->plt.offset >= (PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE)) 4334 { 4335 if (ifunc) 4336 { 4337 rela.r_addend = (h->root.u.def.section->output_section->vma 4338 + h->root.u.def.section->output_offset 4339 + h->root.u.def.value); 4340 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, 0, 4341 R_SPARC_IRELATIVE); 4342 } 4343 else 4344 { 4345 rela.r_addend = (-(h->plt.offset + 4) 4346 - splt->output_section->vma 4347 - splt->output_offset); 4348 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, h->dynindx, 4349 R_SPARC_JMP_SLOT); 4350 } 4351 } 4352 else 4353 { 4354 if (ifunc) 4355 { 4356 rela.r_addend = (h->root.u.def.section->output_section->vma 4357 + h->root.u.def.section->output_offset 4358 + h->root.u.def.value); 4359 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, 0, 4360 R_SPARC_JMP_IREL); 4361 } 4362 else 4363 { 4364 rela.r_addend = 0; 4365 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, h->dynindx, 4366 R_SPARC_JMP_SLOT); 4367 } 4368 } 4369 } 4370 4371 /* Adjust for the first 4 reserved elements in the .plt section 4372 when setting the offset in the .rela.plt section. 4373 Sun forgot to read their own ABI and copied elf32-sparc behaviour, 4374 thus .plt[4] has corresponding .rela.plt[0] and so on. */ 4375 4376 loc = srela->contents; 4377 loc += rela_index * bed->s->sizeof_rela; 4378 bed->s->swap_reloca_out (output_bfd, &rela, loc); 4379 4380 if (!resolved_to_zero && !h->def_regular) 4381 { 4382 /* Mark the symbol as undefined, rather than as defined in 4383 the .plt section. Leave the value alone. */ 4384 sym->st_shndx = SHN_UNDEF; 4385 /* If the symbol is weak, we do need to clear the value. 4386 Otherwise, the PLT entry would provide a definition for 4387 the symbol even if the symbol wasn't defined anywhere, 4388 and so the symbol would never be NULL. */ 4389 if (!h->ref_regular_nonweak) 4390 sym->st_value = 0; 4391 } 4392 } 4393 4394 /* Don't generate dynamic GOT relocation against resolved undefined weak 4395 symbols in an executable. */ 4396 if (h->got.offset != (bfd_vma) -1 4397 && _bfd_sparc_elf_hash_entry(h)->tls_type != GOT_TLS_GD 4398 && _bfd_sparc_elf_hash_entry(h)->tls_type != GOT_TLS_IE 4399 && !(h->root.type == bfd_link_hash_undefweak 4400 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 4401 || resolved_to_zero))) 4402 { 4403 asection *sgot; 4404 asection *srela; 4405 Elf_Internal_Rela rela; 4406 4407 /* This symbol has an entry in the GOT. Set it up. */ 4408 4409 sgot = htab->elf.sgot; 4410 srela = htab->elf.srelgot; 4411 BFD_ASSERT (sgot != NULL && srela != NULL); 4412 4413 rela.r_offset = (sgot->output_section->vma 4414 + sgot->output_offset 4415 + (h->got.offset &~ (bfd_vma) 1)); 4416 4417 /* If this is a -Bsymbolic link, and the symbol is defined 4418 locally, we just want to emit a RELATIVE reloc. Likewise if 4419 the symbol was forced to be local because of a version file. 4420 The entry in the global offset table will already have been 4421 initialized in the relocate_section function. */ 4422 if (! bfd_link_pic (info) 4423 && h->type == STT_GNU_IFUNC 4424 && h->def_regular) 4425 { 4426 asection *plt; 4427 4428 /* We load the GOT entry with the PLT entry. */ 4429 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; 4430 SPARC_ELF_PUT_WORD (htab, output_bfd, 4431 (plt->output_section->vma 4432 + plt->output_offset + h->plt.offset), 4433 htab->elf.sgot->contents 4434 + (h->got.offset & ~(bfd_vma) 1)); 4435 return true; 4436 } 4437 4438 if (bfd_link_pic (info) 4439 && (h->root.type == bfd_link_hash_defined 4440 || h->root.type == bfd_link_hash_defweak) 4441 && SYMBOL_REFERENCES_LOCAL (info, h)) 4442 { 4443 asection *sec = h->root.u.def.section; 4444 if (h->type == STT_GNU_IFUNC) 4445 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, 0, R_SPARC_IRELATIVE); 4446 else 4447 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, 0, R_SPARC_RELATIVE); 4448 rela.r_addend = (h->root.u.def.value 4449 + sec->output_section->vma 4450 + sec->output_offset); 4451 } 4452 else 4453 { 4454 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, h->dynindx, R_SPARC_GLOB_DAT); 4455 rela.r_addend = 0; 4456 } 4457 4458 SPARC_ELF_PUT_WORD (htab, output_bfd, 0, 4459 sgot->contents + (h->got.offset & ~(bfd_vma) 1)); 4460 sparc_elf_append_rela (output_bfd, srela, &rela); 4461 } 4462 4463 if (h->needs_copy) 4464 { 4465 asection *s; 4466 Elf_Internal_Rela rela; 4467 4468 /* This symbols needs a copy reloc. Set it up. */ 4469 BFD_ASSERT (h->dynindx != -1); 4470 4471 rela.r_offset = (h->root.u.def.value 4472 + h->root.u.def.section->output_section->vma 4473 + h->root.u.def.section->output_offset); 4474 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, h->dynindx, R_SPARC_COPY); 4475 rela.r_addend = 0; 4476 if (h->root.u.def.section == htab->elf.sdynrelro) 4477 s = htab->elf.sreldynrelro; 4478 else 4479 s = htab->elf.srelbss; 4480 sparc_elf_append_rela (output_bfd, s, &rela); 4481 } 4482 4483 /* Mark some specially defined symbols as absolute. On VxWorks, 4484 _GLOBAL_OFFSET_TABLE_ is not absolute: it is relative to the 4485 ".got" section. Likewise _PROCEDURE_LINKAGE_TABLE_ and ".plt". */ 4486 if (sym != NULL 4487 && (h == htab->elf.hdynamic 4488 || (htab->elf.target_os != is_vxworks 4489 && (h == htab->elf.hgot || h == htab->elf.hplt)))) 4490 sym->st_shndx = SHN_ABS; 4491 4492 return true; 4493} 4494 4495/* Finish up the dynamic sections. */ 4496 4497static bool 4498sparc_finish_dyn (bfd *output_bfd, struct bfd_link_info *info, 4499 bfd *dynobj, asection *sdyn, 4500 asection *splt ATTRIBUTE_UNUSED) 4501{ 4502 struct _bfd_sparc_elf_link_hash_table *htab; 4503 const struct elf_backend_data *bed; 4504 bfd_byte *dyncon, *dynconend; 4505 size_t dynsize; 4506 int stt_regidx = -1; 4507 bool abi_64_p; 4508 4509 htab = _bfd_sparc_elf_hash_table (info); 4510 BFD_ASSERT (htab != NULL); 4511 bed = get_elf_backend_data (output_bfd); 4512 dynsize = bed->s->sizeof_dyn; 4513 dynconend = sdyn->contents + sdyn->size; 4514 abi_64_p = ABI_64_P (output_bfd); 4515 for (dyncon = sdyn->contents; dyncon < dynconend; dyncon += dynsize) 4516 { 4517 Elf_Internal_Dyn dyn; 4518 bool size; 4519 4520 bed->s->swap_dyn_in (dynobj, dyncon, &dyn); 4521 4522 if (htab->elf.target_os == is_vxworks && dyn.d_tag == DT_PLTGOT) 4523 { 4524 /* On VxWorks, DT_PLTGOT should point to the start of the GOT, 4525 not to the start of the PLT. */ 4526 if (htab->elf.sgotplt) 4527 { 4528 dyn.d_un.d_val = (htab->elf.sgotplt->output_section->vma 4529 + htab->elf.sgotplt->output_offset); 4530 bed->s->swap_dyn_out (output_bfd, &dyn, dyncon); 4531 } 4532 } 4533 else if (htab->elf.target_os == is_vxworks 4534 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) 4535 bed->s->swap_dyn_out (output_bfd, &dyn, dyncon); 4536 else if (abi_64_p && dyn.d_tag == DT_SPARC_REGISTER) 4537 { 4538 if (stt_regidx == -1) 4539 { 4540 stt_regidx = 4541 _bfd_elf_link_lookup_local_dynindx (info, output_bfd, -1); 4542 if (stt_regidx == -1) 4543 return false; 4544 } 4545 dyn.d_un.d_val = stt_regidx++; 4546 bed->s->swap_dyn_out (output_bfd, &dyn, dyncon); 4547 } 4548 else 4549 { 4550 asection *s; 4551 4552 switch (dyn.d_tag) 4553 { 4554 case DT_PLTGOT: 4555 s = htab->elf.splt; 4556 size = false; 4557 break; 4558 case DT_PLTRELSZ: 4559 s = htab->elf.srelplt; 4560 size = true; 4561 break; 4562 case DT_JMPREL: 4563 s = htab->elf.srelplt; 4564 size = false; 4565 break; 4566 default: 4567 continue; 4568 } 4569 4570 if (s == NULL) 4571 dyn.d_un.d_val = 0; 4572 else 4573 { 4574 if (!size) 4575 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 4576 else 4577 dyn.d_un.d_val = s->size; 4578 } 4579 bed->s->swap_dyn_out (output_bfd, &dyn, dyncon); 4580 } 4581 } 4582 return true; 4583} 4584 4585/* Install the first PLT entry in a VxWorks executable and make sure that 4586 .rela.plt.unloaded relocations have the correct symbol indexes. */ 4587 4588static void 4589sparc_vxworks_finish_exec_plt (bfd *output_bfd, struct bfd_link_info *info) 4590{ 4591 struct _bfd_sparc_elf_link_hash_table *htab; 4592 Elf_Internal_Rela rela; 4593 bfd_vma got_base; 4594 bfd_byte *loc; 4595 4596 htab = _bfd_sparc_elf_hash_table (info); 4597 BFD_ASSERT (htab != NULL); 4598 4599 /* Calculate the absolute value of _GLOBAL_OFFSET_TABLE_. */ 4600 got_base = (htab->elf.hgot->root.u.def.section->output_section->vma 4601 + htab->elf.hgot->root.u.def.section->output_offset 4602 + htab->elf.hgot->root.u.def.value); 4603 4604 /* Install the initial PLT entry. */ 4605 bfd_put_32 (output_bfd, 4606 sparc_vxworks_exec_plt0_entry[0] + ((got_base + 8) >> 10), 4607 htab->elf.splt->contents); 4608 bfd_put_32 (output_bfd, 4609 sparc_vxworks_exec_plt0_entry[1] + ((got_base + 8) & 0x3ff), 4610 htab->elf.splt->contents + 4); 4611 bfd_put_32 (output_bfd, 4612 sparc_vxworks_exec_plt0_entry[2], 4613 htab->elf.splt->contents + 8); 4614 bfd_put_32 (output_bfd, 4615 sparc_vxworks_exec_plt0_entry[3], 4616 htab->elf.splt->contents + 12); 4617 bfd_put_32 (output_bfd, 4618 sparc_vxworks_exec_plt0_entry[4], 4619 htab->elf.splt->contents + 16); 4620 4621 loc = htab->srelplt2->contents; 4622 4623 /* Add an unloaded relocation for the initial entry's "sethi". */ 4624 rela.r_offset = (htab->elf.splt->output_section->vma 4625 + htab->elf.splt->output_offset); 4626 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_HI22); 4627 rela.r_addend = 8; 4628 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 4629 loc += sizeof (Elf32_External_Rela); 4630 4631 /* Likewise the following "or". */ 4632 rela.r_offset += 4; 4633 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_LO10); 4634 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 4635 loc += sizeof (Elf32_External_Rela); 4636 4637 /* Fix up the remaining .rela.plt.unloaded relocations. They may have 4638 the wrong symbol index for _G_O_T_ or _P_L_T_ depending on the order 4639 in which symbols were output. */ 4640 while (loc < htab->srelplt2->contents + htab->srelplt2->size) 4641 { 4642 Elf_Internal_Rela rel; 4643 4644 /* The entry's initial "sethi" (against _G_O_T_). */ 4645 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 4646 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_HI22); 4647 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 4648 loc += sizeof (Elf32_External_Rela); 4649 4650 /* The following "or" (also against _G_O_T_). */ 4651 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 4652 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_LO10); 4653 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 4654 loc += sizeof (Elf32_External_Rela); 4655 4656 /* The .got.plt entry (against _P_L_T_). */ 4657 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 4658 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_SPARC_32); 4659 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 4660 loc += sizeof (Elf32_External_Rela); 4661 } 4662} 4663 4664/* Install the first PLT entry in a VxWorks shared object. */ 4665 4666static void 4667sparc_vxworks_finish_shared_plt (bfd *output_bfd, struct bfd_link_info *info) 4668{ 4669 struct _bfd_sparc_elf_link_hash_table *htab; 4670 unsigned int i; 4671 4672 htab = _bfd_sparc_elf_hash_table (info); 4673 BFD_ASSERT (htab != NULL); 4674 4675 for (i = 0; i < ARRAY_SIZE (sparc_vxworks_shared_plt0_entry); i++) 4676 bfd_put_32 (output_bfd, sparc_vxworks_shared_plt0_entry[i], 4677 htab->elf.splt->contents + i * 4); 4678} 4679 4680/* Finish up local dynamic symbol handling. We set the contents of 4681 various dynamic sections here. */ 4682 4683static int 4684finish_local_dynamic_symbol (void **slot, void *inf) 4685{ 4686 struct elf_link_hash_entry *h 4687 = (struct elf_link_hash_entry *) *slot; 4688 struct bfd_link_info *info 4689 = (struct bfd_link_info *) inf; 4690 4691 return _bfd_sparc_elf_finish_dynamic_symbol (info->output_bfd, info, 4692 h, NULL); 4693} 4694 4695/* Finish up undefined weak symbol handling in PIE. Fill its PLT entry 4696 here since undefined weak symbol may not be dynamic and may not be 4697 called for _bfd_sparc_elf_finish_dynamic_symbol. */ 4698 4699static bool 4700pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, 4701 void *inf) 4702{ 4703 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; 4704 struct bfd_link_info *info = (struct bfd_link_info *) inf; 4705 4706 if (h->root.type != bfd_link_hash_undefweak 4707 || h->dynindx != -1) 4708 return true; 4709 4710 return _bfd_sparc_elf_finish_dynamic_symbol (info->output_bfd, info, 4711 h, NULL); 4712} 4713 4714bool 4715_bfd_sparc_elf_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) 4716{ 4717 bfd *dynobj; 4718 asection *sdyn; 4719 struct _bfd_sparc_elf_link_hash_table *htab; 4720 4721 htab = _bfd_sparc_elf_hash_table (info); 4722 BFD_ASSERT (htab != NULL); 4723 dynobj = htab->elf.dynobj; 4724 4725 /* We arranged in size_dynamic_sections to put the STT_REGISTER 4726 entries at the end of the dynlocal list, so they came at the end 4727 of the local symbols in the symtab. Except that they aren't 4728 STB_LOCAL, so we need to back up symtab->sh_info. */ 4729 if (ABI_64_P (output_bfd) 4730 && elf_hash_table (info)->dynlocal) 4731 { 4732 asection *dynsymsec = bfd_get_linker_section (dynobj, ".dynsym"); 4733 struct elf_link_local_dynamic_entry *e; 4734 4735 for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) 4736 if (e->input_indx == -1) 4737 break; 4738 if (e) 4739 elf_section_data (dynsymsec->output_section)->this_hdr.sh_info 4740 = e->dynindx; 4741 } 4742 4743 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 4744 4745 if (elf_hash_table (info)->dynamic_sections_created) 4746 { 4747 asection *splt; 4748 4749 splt = htab->elf.splt; 4750 BFD_ASSERT (splt != NULL && sdyn != NULL); 4751 4752 if (!sparc_finish_dyn (output_bfd, info, dynobj, sdyn, splt)) 4753 return false; 4754 4755 /* Initialize the contents of the .plt section. */ 4756 if (splt->size > 0) 4757 { 4758 if (htab->elf.target_os == is_vxworks) 4759 { 4760 if (bfd_link_pic (info)) 4761 sparc_vxworks_finish_shared_plt (output_bfd, info); 4762 else 4763 sparc_vxworks_finish_exec_plt (output_bfd, info); 4764 } 4765 else 4766 { 4767 memset (splt->contents, 0, htab->plt_header_size); 4768 if (!ABI_64_P (output_bfd)) 4769 bfd_put_32 (output_bfd, (bfd_vma) SPARC_NOP, 4770 splt->contents + splt->size - 4); 4771 } 4772 } 4773 4774 if (elf_section_data (splt->output_section) != NULL) 4775 elf_section_data (splt->output_section)->this_hdr.sh_entsize 4776 = ((htab->elf.target_os == is_vxworks 4777 || !ABI_64_P (output_bfd)) 4778 ? 0 : htab->plt_entry_size); 4779 } 4780 4781 /* Set the first entry in the global offset table to the address of 4782 the dynamic section. */ 4783 if (htab->elf.sgot && htab->elf.sgot->size > 0) 4784 { 4785 bfd_vma val = (sdyn ? 4786 sdyn->output_section->vma + sdyn->output_offset : 4787 0); 4788 4789 SPARC_ELF_PUT_WORD (htab, output_bfd, val, htab->elf.sgot->contents); 4790 } 4791 4792 if (htab->elf.sgot) 4793 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4794 SPARC_ELF_WORD_BYTES (htab); 4795 4796 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ 4797 htab_traverse (htab->loc_hash_table, finish_local_dynamic_symbol, info); 4798 4799 /* Fill PLT entries for undefined weak symbols in PIE. */ 4800 if (bfd_link_pie (info)) 4801 bfd_hash_traverse (&info->hash->table, 4802 pie_finish_undefweak_symbol, 4803 info); 4804 return true; 4805} 4806 4807 4808/* Set the right machine number for a SPARC ELF file. */ 4809 4810bool 4811_bfd_sparc_elf_object_p (bfd *abfd) 4812{ 4813 obj_attribute *attrs = elf_known_obj_attributes (abfd)[OBJ_ATTR_GNU]; 4814 obj_attribute *hwcaps = &attrs[Tag_GNU_Sparc_HWCAPS]; 4815 obj_attribute *hwcaps2 = &attrs[Tag_GNU_Sparc_HWCAPS2]; 4816 4817 unsigned int v9c_hwcaps_mask = ELF_SPARC_HWCAP_ASI_BLK_INIT; 4818 unsigned int v9d_hwcaps_mask = (ELF_SPARC_HWCAP_FMAF 4819 | ELF_SPARC_HWCAP_VIS3 4820 | ELF_SPARC_HWCAP_HPC); 4821 unsigned int v9e_hwcaps_mask = (ELF_SPARC_HWCAP_AES 4822 | ELF_SPARC_HWCAP_DES 4823 | ELF_SPARC_HWCAP_KASUMI 4824 | ELF_SPARC_HWCAP_CAMELLIA 4825 | ELF_SPARC_HWCAP_MD5 4826 | ELF_SPARC_HWCAP_SHA1 4827 | ELF_SPARC_HWCAP_SHA256 4828 | ELF_SPARC_HWCAP_SHA512 4829 | ELF_SPARC_HWCAP_MPMUL 4830 | ELF_SPARC_HWCAP_MONT 4831 | ELF_SPARC_HWCAP_CRC32C 4832 | ELF_SPARC_HWCAP_CBCOND 4833 | ELF_SPARC_HWCAP_PAUSE); 4834 unsigned int v9v_hwcaps_mask = (ELF_SPARC_HWCAP_FJFMAU 4835 | ELF_SPARC_HWCAP_IMA); 4836 unsigned int v9m_hwcaps2_mask = (ELF_SPARC_HWCAP2_SPARC5 4837 | ELF_SPARC_HWCAP2_MWAIT 4838 | ELF_SPARC_HWCAP2_XMPMUL 4839 | ELF_SPARC_HWCAP2_XMONT); 4840 unsigned int m8_hwcaps2_mask = (ELF_SPARC_HWCAP2_SPARC6 4841 | ELF_SPARC_HWCAP2_ONADDSUB 4842 | ELF_SPARC_HWCAP2_ONMUL 4843 | ELF_SPARC_HWCAP2_ONDIV 4844 | ELF_SPARC_HWCAP2_DICTUNP 4845 | ELF_SPARC_HWCAP2_FPCMPSHL 4846 | ELF_SPARC_HWCAP2_RLE 4847 | ELF_SPARC_HWCAP2_SHA3); 4848 4849 if (ABI_64_P (abfd)) 4850 { 4851 unsigned long mach = bfd_mach_sparc_v9; 4852 4853 if (hwcaps2->i & m8_hwcaps2_mask) 4854 mach = bfd_mach_sparc_v9m8; 4855 else if (hwcaps2->i & v9m_hwcaps2_mask) 4856 mach = bfd_mach_sparc_v9m; 4857 else if (hwcaps->i & v9v_hwcaps_mask) 4858 mach = bfd_mach_sparc_v9v; 4859 else if (hwcaps->i & v9e_hwcaps_mask) 4860 mach = bfd_mach_sparc_v9e; 4861 else if (hwcaps->i & v9d_hwcaps_mask) 4862 mach = bfd_mach_sparc_v9d; 4863 else if (hwcaps->i & v9c_hwcaps_mask) 4864 mach = bfd_mach_sparc_v9c; 4865 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US3) 4866 mach = bfd_mach_sparc_v9b; 4867 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1) 4868 mach = bfd_mach_sparc_v9a; 4869 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, mach); 4870 } 4871 else 4872 { 4873 if (elf_elfheader (abfd)->e_machine == EM_SPARC32PLUS) 4874 { 4875 if (hwcaps2->i & m8_hwcaps2_mask) 4876 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, 4877 bfd_mach_sparc_v8plusm8); 4878 else if (hwcaps2->i & v9m_hwcaps2_mask) 4879 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, 4880 bfd_mach_sparc_v8plusm); 4881 else if (hwcaps->i & v9v_hwcaps_mask) 4882 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, 4883 bfd_mach_sparc_v8plusv); 4884 else if (hwcaps->i & v9e_hwcaps_mask) 4885 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, 4886 bfd_mach_sparc_v8pluse); 4887 else if (hwcaps->i & v9d_hwcaps_mask) 4888 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, 4889 bfd_mach_sparc_v8plusd); 4890 else if (hwcaps->i & v9c_hwcaps_mask) 4891 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, 4892 bfd_mach_sparc_v8plusc); 4893 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US3) 4894 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, 4895 bfd_mach_sparc_v8plusb); 4896 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1) 4897 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, 4898 bfd_mach_sparc_v8plusa); 4899 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_32PLUS) 4900 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, 4901 bfd_mach_sparc_v8plus); 4902 else 4903 return false; 4904 } 4905 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_LEDATA) 4906 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, 4907 bfd_mach_sparc_sparclite_le); 4908 else 4909 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc); 4910 } 4911} 4912 4913/* Return address for Ith PLT stub in section PLT, for relocation REL 4914 or (bfd_vma) -1 if it should not be included. */ 4915 4916bfd_vma 4917_bfd_sparc_elf_plt_sym_val (bfd_vma i, const asection *plt, const arelent *rel) 4918{ 4919 if (ABI_64_P (plt->owner)) 4920 { 4921 bfd_vma j; 4922 4923 i += PLT64_HEADER_SIZE / PLT64_ENTRY_SIZE; 4924 if (i < PLT64_LARGE_THRESHOLD) 4925 return plt->vma + i * PLT64_ENTRY_SIZE; 4926 4927 j = (i - PLT64_LARGE_THRESHOLD) % 160; 4928 i -= j; 4929 return plt->vma + i * PLT64_ENTRY_SIZE + j * 4 * 6; 4930 } 4931 else 4932 return rel->address; 4933} 4934 4935/* Merge backend specific data from an object file to the output 4936 object file when linking. */ 4937 4938bool 4939_bfd_sparc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 4940{ 4941 bfd *obfd = info->output_bfd; 4942 obj_attribute *in_attr, *in_attrs; 4943 obj_attribute *out_attr, *out_attrs; 4944 4945 if (!elf_known_obj_attributes_proc (obfd)[0].i) 4946 { 4947 /* This is the first object. Copy the attributes. */ 4948 _bfd_elf_copy_obj_attributes (ibfd, obfd); 4949 4950 /* Use the Tag_null value to indicate the attributes have been 4951 initialized. */ 4952 elf_known_obj_attributes_proc (obfd)[0].i = 1; 4953 4954 return true; 4955 } 4956 4957 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU]; 4958 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU]; 4959 4960 in_attr = &in_attrs[Tag_GNU_Sparc_HWCAPS]; 4961 out_attr = &out_attrs[Tag_GNU_Sparc_HWCAPS]; 4962 4963 out_attr->i |= in_attr->i; 4964 out_attr->type = 1; 4965 4966 in_attr = &in_attrs[Tag_GNU_Sparc_HWCAPS2]; 4967 out_attr = &out_attrs[Tag_GNU_Sparc_HWCAPS2]; 4968 4969 out_attr->i |= in_attr->i; 4970 out_attr->type = 1; 4971 4972 /* Merge Tag_compatibility attributes and any common GNU ones. */ 4973 _bfd_elf_merge_object_attributes (ibfd, info); 4974 4975 return true; 4976} 4977