1 /* SPARC-specific support for ELF 2 Copyright 2005, 2006, 2007, 2008, 2009, 2010 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 53 static bfd_reloc_status_type 54 init_insn_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 55 PTR 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 95 static bfd_reloc_status_type 96 sparc_elf_notsup_reloc (bfd *abfd ATTRIBUTE_UNUSED, 97 arelent *reloc_entry ATTRIBUTE_UNUSED, 98 asymbol *symbol ATTRIBUTE_UNUSED, 99 PTR 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. */ 108 109 static bfd_reloc_status_type 110 sparc_elf_wdisp16_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 111 PTR 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 HIX22 reloc. */ 135 136 static bfd_reloc_status_type 137 sparc_elf_hix22_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 138 PTR 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 relocation ^= MINUS_ONE; 151 insn = (insn &~ (bfd_vma) 0x3fffff) | ((relocation >> 10) & 0x3fffff); 152 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); 153 154 if ((relocation & ~ (bfd_vma) 0xffffffff) != 0) 155 return bfd_reloc_overflow; 156 else 157 return bfd_reloc_ok; 158 } 159 160 /* Handle the LOX10 reloc. */ 161 162 static bfd_reloc_status_type 163 sparc_elf_lox10_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 164 PTR data, asection *input_section, bfd *output_bfd, 165 char **error_message ATTRIBUTE_UNUSED) 166 { 167 bfd_vma relocation; 168 bfd_vma insn; 169 bfd_reloc_status_type status; 170 171 status = init_insn_reloc (abfd, reloc_entry, symbol, data, 172 input_section, output_bfd, &relocation, &insn); 173 if (status != bfd_reloc_other) 174 return status; 175 176 insn = (insn &~ (bfd_vma) 0x1fff) | 0x1c00 | (relocation & 0x3ff); 177 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); 178 179 return bfd_reloc_ok; 180 } 181 182 static reloc_howto_type _bfd_sparc_elf_howto_table[] = 183 { 184 HOWTO(R_SPARC_NONE, 0,0, 0,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", FALSE,0,0x00000000,TRUE), 185 HOWTO(R_SPARC_8, 0,0, 8,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_8", FALSE,0,0x000000ff,TRUE), 186 HOWTO(R_SPARC_16, 0,1,16,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_16", FALSE,0,0x0000ffff,TRUE), 187 HOWTO(R_SPARC_32, 0,2,32,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_32", FALSE,0,0xffffffff,TRUE), 188 HOWTO(R_SPARC_DISP8, 0,0, 8,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP8", FALSE,0,0x000000ff,TRUE), 189 HOWTO(R_SPARC_DISP16, 0,1,16,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP16", FALSE,0,0x0000ffff,TRUE), 190 HOWTO(R_SPARC_DISP32, 0,2,32,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP32", FALSE,0,0xffffffff,TRUE), 191 HOWTO(R_SPARC_WDISP30, 2,2,30,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP30", FALSE,0,0x3fffffff,TRUE), 192 HOWTO(R_SPARC_WDISP22, 2,2,22,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP22", FALSE,0,0x003fffff,TRUE), 193 HOWTO(R_SPARC_HI22, 10,2,22,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HI22", FALSE,0,0x003fffff,TRUE), 194 HOWTO(R_SPARC_22, 0,2,22,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_22", FALSE,0,0x003fffff,TRUE), 195 HOWTO(R_SPARC_13, 0,2,13,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_13", FALSE,0,0x00001fff,TRUE), 196 HOWTO(R_SPARC_LO10, 0,2,10,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LO10", FALSE,0,0x000003ff,TRUE), 197 HOWTO(R_SPARC_GOT10, 0,2,10,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT10", FALSE,0,0x000003ff,TRUE), 198 HOWTO(R_SPARC_GOT13, 0,2,13,FALSE,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_GOT13", FALSE,0,0x00001fff,TRUE), 199 HOWTO(R_SPARC_GOT22, 10,2,22,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT22", FALSE,0,0x003fffff,TRUE), 200 HOWTO(R_SPARC_PC10, 0,2,10,TRUE, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC10", FALSE,0,0x000003ff,TRUE), 201 HOWTO(R_SPARC_PC22, 10,2,22,TRUE, 0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PC22", FALSE,0,0x003fffff,TRUE), 202 HOWTO(R_SPARC_WPLT30, 2,2,30,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WPLT30", FALSE,0,0x3fffffff,TRUE), 203 HOWTO(R_SPARC_COPY, 0,0,00,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_COPY", FALSE,0,0x00000000,TRUE), 204 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), 205 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), 206 HOWTO(R_SPARC_RELATIVE, 0,0,00,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_RELATIVE",FALSE,0,0x00000000,TRUE), 207 HOWTO(R_SPARC_UA32, 0,2,32,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA32", FALSE,0,0xffffffff,TRUE), 208 HOWTO(R_SPARC_PLT32, 0,2,32,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PLT32", FALSE,0,0xffffffff,TRUE), 209 HOWTO(R_SPARC_HIPLT22, 0,0,00,FALSE,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_HIPLT22", FALSE,0,0x00000000,TRUE), 210 HOWTO(R_SPARC_LOPLT10, 0,0,00,FALSE,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_LOPLT10", FALSE,0,0x00000000,TRUE), 211 HOWTO(R_SPARC_PCPLT32, 0,0,00,FALSE,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT32", FALSE,0,0x00000000,TRUE), 212 HOWTO(R_SPARC_PCPLT22, 0,0,00,FALSE,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT22", FALSE,0,0x00000000,TRUE), 213 HOWTO(R_SPARC_PCPLT10, 0,0,00,FALSE,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT10", FALSE,0,0x00000000,TRUE), 214 HOWTO(R_SPARC_10, 0,2,10,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_10", FALSE,0,0x000003ff,TRUE), 215 HOWTO(R_SPARC_11, 0,2,11,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_11", FALSE,0,0x000007ff,TRUE), 216 HOWTO(R_SPARC_64, 0,4,64,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_64", FALSE,0,MINUS_ONE, TRUE), 217 HOWTO(R_SPARC_OLO10, 0,2,13,FALSE,0,complain_overflow_signed, sparc_elf_notsup_reloc, "R_SPARC_OLO10", FALSE,0,0x00001fff,TRUE), 218 HOWTO(R_SPARC_HH22, 42,2,22,FALSE,0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_HH22", FALSE,0,0x003fffff,TRUE), 219 HOWTO(R_SPARC_HM10, 32,2,10,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HM10", FALSE,0,0x000003ff,TRUE), 220 HOWTO(R_SPARC_LM22, 10,2,22,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LM22", FALSE,0,0x003fffff,TRUE), 221 HOWTO(R_SPARC_PC_HH22, 42,2,22,TRUE, 0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_PC_HH22", FALSE,0,0x003fffff,TRUE), 222 HOWTO(R_SPARC_PC_HM10, 32,2,10,TRUE, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC_HM10", FALSE,0,0x000003ff,TRUE), 223 HOWTO(R_SPARC_PC_LM22, 10,2,22,TRUE, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC_LM22", FALSE,0,0x003fffff,TRUE), 224 HOWTO(R_SPARC_WDISP16, 2,2,16,TRUE, 0,complain_overflow_signed, sparc_elf_wdisp16_reloc,"R_SPARC_WDISP16", FALSE,0,0x00000000,TRUE), 225 HOWTO(R_SPARC_WDISP19, 2,2,19,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP19", FALSE,0,0x0007ffff,TRUE), 226 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), 227 HOWTO(R_SPARC_7, 0,2, 7,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_7", FALSE,0,0x0000007f,TRUE), 228 HOWTO(R_SPARC_5, 0,2, 5,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_5", FALSE,0,0x0000001f,TRUE), 229 HOWTO(R_SPARC_6, 0,2, 6,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_6", FALSE,0,0x0000003f,TRUE), 230 HOWTO(R_SPARC_DISP64, 0,4,64,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP64", FALSE,0,MINUS_ONE, TRUE), 231 HOWTO(R_SPARC_PLT64, 0,4,64,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PLT64", FALSE,0,MINUS_ONE, TRUE), 232 HOWTO(R_SPARC_HIX22, 0,4, 0,FALSE,0,complain_overflow_bitfield,sparc_elf_hix22_reloc, "R_SPARC_HIX22", FALSE,0,MINUS_ONE, FALSE), 233 HOWTO(R_SPARC_LOX10, 0,4, 0,FALSE,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_LOX10", FALSE,0,MINUS_ONE, FALSE), 234 HOWTO(R_SPARC_H44, 22,2,22,FALSE,0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_H44", FALSE,0,0x003fffff,FALSE), 235 HOWTO(R_SPARC_M44, 12,2,10,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_M44", FALSE,0,0x000003ff,FALSE), 236 HOWTO(R_SPARC_L44, 0,2,13,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_L44", FALSE,0,0x00000fff,FALSE), 237 HOWTO(R_SPARC_REGISTER, 0,4, 0,FALSE,0,complain_overflow_bitfield,sparc_elf_notsup_reloc, "R_SPARC_REGISTER",FALSE,0,MINUS_ONE, FALSE), 238 HOWTO(R_SPARC_UA64, 0,4,64,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA64", FALSE,0,MINUS_ONE, TRUE), 239 HOWTO(R_SPARC_UA16, 0,1,16,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA16", FALSE,0,0x0000ffff,TRUE), 240 HOWTO(R_SPARC_TLS_GD_HI22,10,2,22,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_GD_HI22",FALSE,0,0x003fffff,TRUE), 241 HOWTO(R_SPARC_TLS_GD_LO10,0,2,10,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_GD_LO10",FALSE,0,0x000003ff,TRUE), 242 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), 243 HOWTO(R_SPARC_TLS_GD_CALL,2,2,30,TRUE,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_TLS_GD_CALL",FALSE,0,0x3fffffff,TRUE), 244 HOWTO(R_SPARC_TLS_LDM_HI22,10,2,22,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_LDM_HI22",FALSE,0,0x003fffff,TRUE), 245 HOWTO(R_SPARC_TLS_LDM_LO10,0,2,10,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_LDM_LO10",FALSE,0,0x000003ff,TRUE), 246 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), 247 HOWTO(R_SPARC_TLS_LDM_CALL,2,2,30,TRUE,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_TLS_LDM_CALL",FALSE,0,0x3fffffff,TRUE), 248 HOWTO(R_SPARC_TLS_LDO_HIX22,0,2,0,FALSE,0,complain_overflow_bitfield,sparc_elf_hix22_reloc,"R_SPARC_TLS_LDO_HIX22",FALSE,0,0x003fffff, FALSE), 249 HOWTO(R_SPARC_TLS_LDO_LOX10,0,2,0,FALSE,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_TLS_LDO_LOX10",FALSE,0,0x000003ff, FALSE), 250 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), 251 HOWTO(R_SPARC_TLS_IE_HI22,10,2,22,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_IE_HI22",FALSE,0,0x003fffff,TRUE), 252 HOWTO(R_SPARC_TLS_IE_LO10,0,2,10,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_IE_LO10",FALSE,0,0x000003ff,TRUE), 253 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), 254 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), 255 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), 256 HOWTO(R_SPARC_TLS_LE_HIX22,0,2,0,FALSE,0,complain_overflow_bitfield,sparc_elf_hix22_reloc, "R_SPARC_TLS_LE_HIX22",FALSE,0,0x003fffff, FALSE), 257 HOWTO(R_SPARC_TLS_LE_LOX10,0,2,0,FALSE,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_TLS_LE_LOX10",FALSE,0,0x000003ff, FALSE), 258 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), 259 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), 260 HOWTO(R_SPARC_TLS_DTPOFF32,0,2,32,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc,"R_SPARC_TLS_DTPOFF32",FALSE,0,0xffffffff,TRUE), 261 HOWTO(R_SPARC_TLS_DTPOFF64,0,4,64,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc,"R_SPARC_TLS_DTPOFF64",FALSE,0,MINUS_ONE,TRUE), 262 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), 263 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), 264 HOWTO(R_SPARC_GOTDATA_HIX22,0,2,0,FALSE,0,complain_overflow_bitfield,sparc_elf_hix22_reloc,"R_SPARC_GOTDATA_HIX22",FALSE,0,0x003fffff, FALSE), 265 HOWTO(R_SPARC_GOTDATA_LOX10,0,2,0,FALSE,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_GOTDATA_LOX10",FALSE,0,0x000003ff, FALSE), 266 HOWTO(R_SPARC_GOTDATA_OP_HIX22,0,2,0,FALSE,0,complain_overflow_bitfield,sparc_elf_hix22_reloc,"R_SPARC_GOTDATA_OP_HIX22",FALSE,0,0x003fffff, FALSE), 267 HOWTO(R_SPARC_GOTDATA_OP_LOX10,0,2,0,FALSE,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_GOTDATA_OP_LOX10",FALSE,0,0x000003ff, FALSE), 268 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), 269 }; 270 static reloc_howto_type sparc_jmp_irel_howto = 271 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); 272 static reloc_howto_type sparc_irelative_howto = 273 HOWTO(R_SPARC_IRELATIVE, 0,0,00,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_IRELATIVE",FALSE,0,0x00000000,TRUE); 274 static reloc_howto_type sparc_vtinherit_howto = 275 HOWTO (R_SPARC_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_SPARC_GNU_VTINHERIT", FALSE,0, 0, FALSE); 276 static reloc_howto_type sparc_vtentry_howto = 277 HOWTO (R_SPARC_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_SPARC_GNU_VTENTRY", FALSE,0,0, FALSE); 278 static reloc_howto_type sparc_rev32_howto = 279 HOWTO(R_SPARC_REV32, 0,2,32,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_REV32", FALSE,0,0xffffffff,TRUE); 280 281 reloc_howto_type * 282 _bfd_sparc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 283 bfd_reloc_code_real_type code) 284 { 285 /* We explicitly handle each relocation type in the switch 286 instead of using a lookup table for efficiency. */ 287 switch (code) 288 { 289 case BFD_RELOC_NONE: 290 return &_bfd_sparc_elf_howto_table[R_SPARC_NONE]; 291 292 case BFD_RELOC_8: 293 return &_bfd_sparc_elf_howto_table[R_SPARC_8]; 294 295 case BFD_RELOC_16: 296 return &_bfd_sparc_elf_howto_table[R_SPARC_16]; 297 298 case BFD_RELOC_32: 299 return &_bfd_sparc_elf_howto_table[R_SPARC_32]; 300 301 case BFD_RELOC_8_PCREL: 302 return &_bfd_sparc_elf_howto_table[R_SPARC_DISP8]; 303 304 case BFD_RELOC_16_PCREL: 305 return &_bfd_sparc_elf_howto_table[R_SPARC_DISP16]; 306 307 case BFD_RELOC_32_PCREL: 308 return &_bfd_sparc_elf_howto_table[R_SPARC_DISP32]; 309 310 case BFD_RELOC_32_PCREL_S2: 311 return &_bfd_sparc_elf_howto_table[R_SPARC_WDISP30]; 312 313 case BFD_RELOC_SPARC_WDISP22: 314 return &_bfd_sparc_elf_howto_table[R_SPARC_WDISP22]; 315 316 case BFD_RELOC_HI22: 317 return &_bfd_sparc_elf_howto_table[R_SPARC_HI22]; 318 319 case BFD_RELOC_SPARC22: 320 return &_bfd_sparc_elf_howto_table[R_SPARC_22]; 321 322 case BFD_RELOC_SPARC13: 323 return &_bfd_sparc_elf_howto_table[R_SPARC_13]; 324 325 case BFD_RELOC_LO10: 326 return &_bfd_sparc_elf_howto_table[R_SPARC_LO10]; 327 328 case BFD_RELOC_SPARC_GOT10: 329 return &_bfd_sparc_elf_howto_table[R_SPARC_GOT10]; 330 331 case BFD_RELOC_SPARC_GOT13: 332 return &_bfd_sparc_elf_howto_table[R_SPARC_GOT13]; 333 334 case BFD_RELOC_SPARC_GOT22: 335 return &_bfd_sparc_elf_howto_table[R_SPARC_GOT22]; 336 337 case BFD_RELOC_SPARC_PC10: 338 return &_bfd_sparc_elf_howto_table[R_SPARC_PC10]; 339 340 case BFD_RELOC_SPARC_PC22: 341 return &_bfd_sparc_elf_howto_table[R_SPARC_PC22]; 342 343 case BFD_RELOC_SPARC_WPLT30: 344 return &_bfd_sparc_elf_howto_table[R_SPARC_WPLT30]; 345 346 case BFD_RELOC_SPARC_COPY: 347 return &_bfd_sparc_elf_howto_table[R_SPARC_COPY]; 348 349 case BFD_RELOC_SPARC_GLOB_DAT: 350 return &_bfd_sparc_elf_howto_table[R_SPARC_GLOB_DAT]; 351 352 case BFD_RELOC_SPARC_JMP_SLOT: 353 return &_bfd_sparc_elf_howto_table[R_SPARC_JMP_SLOT]; 354 355 case BFD_RELOC_SPARC_RELATIVE: 356 return &_bfd_sparc_elf_howto_table[R_SPARC_RELATIVE]; 357 358 case BFD_RELOC_SPARC_UA32: 359 return &_bfd_sparc_elf_howto_table[R_SPARC_UA32]; 360 361 case BFD_RELOC_SPARC_PLT32: 362 return &_bfd_sparc_elf_howto_table[R_SPARC_PLT32]; 363 364 case BFD_RELOC_SPARC_10: 365 return &_bfd_sparc_elf_howto_table[R_SPARC_10]; 366 367 case BFD_RELOC_SPARC_11: 368 return &_bfd_sparc_elf_howto_table[R_SPARC_11]; 369 370 case BFD_RELOC_SPARC_64: 371 return &_bfd_sparc_elf_howto_table[R_SPARC_64]; 372 373 case BFD_RELOC_SPARC_OLO10: 374 return &_bfd_sparc_elf_howto_table[R_SPARC_OLO10]; 375 376 case BFD_RELOC_SPARC_HH22: 377 return &_bfd_sparc_elf_howto_table[R_SPARC_HH22]; 378 379 case BFD_RELOC_SPARC_HM10: 380 return &_bfd_sparc_elf_howto_table[R_SPARC_HM10]; 381 382 case BFD_RELOC_SPARC_LM22: 383 return &_bfd_sparc_elf_howto_table[R_SPARC_LM22]; 384 385 case BFD_RELOC_SPARC_PC_HH22: 386 return &_bfd_sparc_elf_howto_table[R_SPARC_PC_HH22]; 387 388 case BFD_RELOC_SPARC_PC_HM10: 389 return &_bfd_sparc_elf_howto_table[R_SPARC_PC_HM10]; 390 391 case BFD_RELOC_SPARC_PC_LM22: 392 return &_bfd_sparc_elf_howto_table[R_SPARC_PC_LM22]; 393 394 case BFD_RELOC_SPARC_WDISP16: 395 return &_bfd_sparc_elf_howto_table[R_SPARC_WDISP16]; 396 397 case BFD_RELOC_SPARC_WDISP19: 398 return &_bfd_sparc_elf_howto_table[R_SPARC_WDISP19]; 399 400 case BFD_RELOC_SPARC_7: 401 return &_bfd_sparc_elf_howto_table[R_SPARC_7]; 402 403 case BFD_RELOC_SPARC_5: 404 return &_bfd_sparc_elf_howto_table[R_SPARC_5]; 405 406 case BFD_RELOC_SPARC_6: 407 return &_bfd_sparc_elf_howto_table[R_SPARC_6]; 408 409 case BFD_RELOC_SPARC_DISP64: 410 return &_bfd_sparc_elf_howto_table[R_SPARC_DISP64]; 411 412 case BFD_RELOC_SPARC_PLT64: 413 return &_bfd_sparc_elf_howto_table[R_SPARC_PLT64]; 414 415 case BFD_RELOC_SPARC_HIX22: 416 return &_bfd_sparc_elf_howto_table[R_SPARC_HIX22]; 417 418 case BFD_RELOC_SPARC_LOX10: 419 return &_bfd_sparc_elf_howto_table[R_SPARC_LOX10]; 420 421 case BFD_RELOC_SPARC_H44: 422 return &_bfd_sparc_elf_howto_table[R_SPARC_H44]; 423 424 case BFD_RELOC_SPARC_M44: 425 return &_bfd_sparc_elf_howto_table[R_SPARC_M44]; 426 427 case BFD_RELOC_SPARC_L44: 428 return &_bfd_sparc_elf_howto_table[R_SPARC_L44]; 429 430 case BFD_RELOC_SPARC_REGISTER: 431 return &_bfd_sparc_elf_howto_table[R_SPARC_REGISTER]; 432 433 case BFD_RELOC_SPARC_UA64: 434 return &_bfd_sparc_elf_howto_table[R_SPARC_UA64]; 435 436 case BFD_RELOC_SPARC_UA16: 437 return &_bfd_sparc_elf_howto_table[R_SPARC_UA16]; 438 439 case BFD_RELOC_SPARC_TLS_GD_HI22: 440 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_GD_HI22]; 441 442 case BFD_RELOC_SPARC_TLS_GD_LO10: 443 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_GD_LO10]; 444 445 case BFD_RELOC_SPARC_TLS_GD_ADD: 446 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_GD_ADD]; 447 448 case BFD_RELOC_SPARC_TLS_GD_CALL: 449 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_GD_CALL]; 450 451 case BFD_RELOC_SPARC_TLS_LDM_HI22: 452 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDM_HI22]; 453 454 case BFD_RELOC_SPARC_TLS_LDM_LO10: 455 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDM_LO10]; 456 457 case BFD_RELOC_SPARC_TLS_LDM_ADD: 458 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDM_ADD]; 459 460 case BFD_RELOC_SPARC_TLS_LDM_CALL: 461 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDM_CALL]; 462 463 case BFD_RELOC_SPARC_TLS_LDO_HIX22: 464 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDO_HIX22]; 465 466 case BFD_RELOC_SPARC_TLS_LDO_LOX10: 467 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDO_LOX10]; 468 469 case BFD_RELOC_SPARC_TLS_LDO_ADD: 470 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDO_ADD]; 471 472 case BFD_RELOC_SPARC_TLS_IE_HI22: 473 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_IE_HI22]; 474 475 case BFD_RELOC_SPARC_TLS_IE_LO10: 476 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_IE_LO10]; 477 478 case BFD_RELOC_SPARC_TLS_IE_LD: 479 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_IE_LD]; 480 481 case BFD_RELOC_SPARC_TLS_IE_LDX: 482 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_IE_LDX]; 483 484 case BFD_RELOC_SPARC_TLS_IE_ADD: 485 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_IE_ADD]; 486 487 case BFD_RELOC_SPARC_TLS_LE_HIX22: 488 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LE_HIX22]; 489 490 case BFD_RELOC_SPARC_TLS_LE_LOX10: 491 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LE_LOX10]; 492 493 case BFD_RELOC_SPARC_TLS_DTPMOD32: 494 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_DTPMOD32]; 495 496 case BFD_RELOC_SPARC_TLS_DTPMOD64: 497 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_DTPMOD64]; 498 499 case BFD_RELOC_SPARC_TLS_DTPOFF32: 500 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_DTPOFF32]; 501 502 case BFD_RELOC_SPARC_TLS_DTPOFF64: 503 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_DTPOFF64]; 504 505 case BFD_RELOC_SPARC_TLS_TPOFF32: 506 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_TPOFF32]; 507 508 case BFD_RELOC_SPARC_TLS_TPOFF64: 509 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_TPOFF64]; 510 511 case BFD_RELOC_SPARC_GOTDATA_HIX22: 512 return &_bfd_sparc_elf_howto_table[R_SPARC_GOTDATA_HIX22]; 513 514 case BFD_RELOC_SPARC_GOTDATA_LOX10: 515 return &_bfd_sparc_elf_howto_table[R_SPARC_GOTDATA_LOX10]; 516 517 case BFD_RELOC_SPARC_GOTDATA_OP_HIX22: 518 return &_bfd_sparc_elf_howto_table[R_SPARC_GOTDATA_OP_HIX22]; 519 520 case BFD_RELOC_SPARC_GOTDATA_OP_LOX10: 521 return &_bfd_sparc_elf_howto_table[R_SPARC_GOTDATA_OP_LOX10]; 522 523 case BFD_RELOC_SPARC_GOTDATA_OP: 524 return &_bfd_sparc_elf_howto_table[R_SPARC_GOTDATA_OP]; 525 526 case BFD_RELOC_SPARC_JMP_IREL: 527 return &sparc_jmp_irel_howto; 528 529 case BFD_RELOC_SPARC_IRELATIVE: 530 return &sparc_irelative_howto; 531 532 case BFD_RELOC_VTABLE_INHERIT: 533 return &sparc_vtinherit_howto; 534 535 case BFD_RELOC_VTABLE_ENTRY: 536 return &sparc_vtentry_howto; 537 538 case BFD_RELOC_SPARC_REV32: 539 return &sparc_rev32_howto; 540 541 default: 542 break; 543 } 544 bfd_set_error (bfd_error_bad_value); 545 return NULL; 546 } 547 548 reloc_howto_type * 549 _bfd_sparc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 550 const char *r_name) 551 { 552 unsigned int i; 553 554 for (i = 0; 555 i < (sizeof (_bfd_sparc_elf_howto_table) 556 / sizeof (_bfd_sparc_elf_howto_table[0])); 557 i++) 558 if (_bfd_sparc_elf_howto_table[i].name != NULL 559 && strcasecmp (_bfd_sparc_elf_howto_table[i].name, r_name) == 0) 560 return &_bfd_sparc_elf_howto_table[i]; 561 562 if (strcasecmp (sparc_vtinherit_howto.name, r_name) == 0) 563 return &sparc_vtinherit_howto; 564 if (strcasecmp (sparc_vtentry_howto.name, r_name) == 0) 565 return &sparc_vtentry_howto; 566 if (strcasecmp (sparc_rev32_howto.name, r_name) == 0) 567 return &sparc_rev32_howto; 568 569 return NULL; 570 } 571 572 reloc_howto_type * 573 _bfd_sparc_elf_info_to_howto_ptr (unsigned int r_type) 574 { 575 switch (r_type) 576 { 577 case R_SPARC_JMP_IREL: 578 return &sparc_jmp_irel_howto; 579 580 case R_SPARC_IRELATIVE: 581 return &sparc_irelative_howto; 582 583 case R_SPARC_GNU_VTINHERIT: 584 return &sparc_vtinherit_howto; 585 586 case R_SPARC_GNU_VTENTRY: 587 return &sparc_vtentry_howto; 588 589 case R_SPARC_REV32: 590 return &sparc_rev32_howto; 591 592 default: 593 if (r_type >= (unsigned int) R_SPARC_max_std) 594 { 595 (*_bfd_error_handler) (_("invalid relocation type %d"), 596 (int) r_type); 597 r_type = R_SPARC_NONE; 598 } 599 return &_bfd_sparc_elf_howto_table[r_type]; 600 } 601 } 602 603 /* Both 32-bit and 64-bit sparc encode this in an identical manner, 604 so just take advantage of that. */ 605 #define SPARC_ELF_R_TYPE(r_info) \ 606 ((r_info) & 0xff) 607 608 void 609 _bfd_sparc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, 610 Elf_Internal_Rela *dst) 611 { 612 unsigned int r_type = SPARC_ELF_R_TYPE (dst->r_info); 613 614 cache_ptr->howto = _bfd_sparc_elf_info_to_howto_ptr (r_type); 615 } 616 617 618 /* The nop opcode we use. */ 619 #define SPARC_NOP 0x01000000 620 621 #define SPARC_INSN_BYTES 4 622 623 /* The SPARC linker needs to keep track of the number of relocs that it 624 decides to copy as dynamic relocs in check_relocs for each symbol. 625 This is so that it can later discard them if they are found to be 626 unnecessary. We store the information in a field extending the 627 regular ELF linker hash table. */ 628 629 struct _bfd_sparc_elf_dyn_relocs 630 { 631 struct _bfd_sparc_elf_dyn_relocs *next; 632 633 /* The input section of the reloc. */ 634 asection *sec; 635 636 /* Total number of relocs copied for the input section. */ 637 bfd_size_type count; 638 639 /* Number of pc-relative relocs copied for the input section. */ 640 bfd_size_type pc_count; 641 }; 642 643 /* SPARC ELF linker hash entry. */ 644 645 struct _bfd_sparc_elf_link_hash_entry 646 { 647 struct elf_link_hash_entry elf; 648 649 /* Track dynamic relocs copied for this symbol. */ 650 struct _bfd_sparc_elf_dyn_relocs *dyn_relocs; 651 652 #define GOT_UNKNOWN 0 653 #define GOT_NORMAL 1 654 #define GOT_TLS_GD 2 655 #define GOT_TLS_IE 3 656 unsigned char tls_type; 657 }; 658 659 #define _bfd_sparc_elf_hash_entry(ent) ((struct _bfd_sparc_elf_link_hash_entry *)(ent)) 660 661 struct _bfd_sparc_elf_obj_tdata 662 { 663 struct elf_obj_tdata root; 664 665 /* tls_type for each local got entry. */ 666 char *local_got_tls_type; 667 668 /* TRUE if TLS GD relocs has been seen for this object. */ 669 bfd_boolean has_tlsgd; 670 }; 671 672 #define _bfd_sparc_elf_tdata(abfd) \ 673 ((struct _bfd_sparc_elf_obj_tdata *) (abfd)->tdata.any) 674 675 #define _bfd_sparc_elf_local_got_tls_type(abfd) \ 676 (_bfd_sparc_elf_tdata (abfd)->local_got_tls_type) 677 678 #define is_sparc_elf(bfd) \ 679 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 680 && elf_tdata (bfd) != NULL \ 681 && elf_object_id (bfd) == SPARC_ELF_DATA) 682 683 bfd_boolean 684 _bfd_sparc_elf_mkobject (bfd *abfd) 685 { 686 return bfd_elf_allocate_object (abfd, sizeof (struct _bfd_sparc_elf_obj_tdata), 687 SPARC_ELF_DATA); 688 } 689 690 static void 691 sparc_put_word_32 (bfd *abfd, bfd_vma val, void *ptr) 692 { 693 bfd_put_32 (abfd, val, ptr); 694 } 695 696 static void 697 sparc_put_word_64 (bfd *abfd, bfd_vma val, void *ptr) 698 { 699 bfd_put_64 (abfd, val, ptr); 700 } 701 702 static void 703 sparc_elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel) 704 { 705 const struct elf_backend_data *bed; 706 bfd_byte *loc; 707 708 bed = get_elf_backend_data (abfd); 709 loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela); 710 bed->s->swap_reloca_out (abfd, rel, loc); 711 } 712 713 static bfd_vma 714 sparc_elf_r_info_64 (Elf_Internal_Rela *in_rel ATTRIBUTE_UNUSED, 715 bfd_vma rel_index ATTRIBUTE_UNUSED, 716 bfd_vma type ATTRIBUTE_UNUSED) 717 { 718 return ELF64_R_INFO (rel_index, 719 (in_rel ? 720 ELF64_R_TYPE_INFO (ELF64_R_TYPE_DATA (in_rel->r_info), 721 type) : type)); 722 } 723 724 static bfd_vma 725 sparc_elf_r_info_32 (Elf_Internal_Rela *in_rel ATTRIBUTE_UNUSED, 726 bfd_vma rel_index, bfd_vma type) 727 { 728 return ELF32_R_INFO (rel_index, type); 729 } 730 731 static bfd_vma 732 sparc_elf_r_symndx_64 (bfd_vma r_info) 733 { 734 bfd_vma r_symndx = ELF32_R_SYM (r_info); 735 return (r_symndx >> 24); 736 } 737 738 static bfd_vma 739 sparc_elf_r_symndx_32 (bfd_vma r_info) 740 { 741 return ELF32_R_SYM (r_info); 742 } 743 744 /* PLT/GOT stuff */ 745 746 #define PLT32_ENTRY_SIZE 12 747 #define PLT32_HEADER_SIZE (4 * PLT32_ENTRY_SIZE) 748 749 /* The first four entries in a 32-bit procedure linkage table are reserved, 750 and the initial contents are unimportant (we zero them out). 751 Subsequent entries look like this. See the SVR4 ABI SPARC 752 supplement to see how this works. */ 753 754 /* sethi %hi(.-.plt0),%g1. We fill in the address later. */ 755 #define PLT32_ENTRY_WORD0 0x03000000 756 /* b,a .plt0. We fill in the offset later. */ 757 #define PLT32_ENTRY_WORD1 0x30800000 758 /* nop. */ 759 #define PLT32_ENTRY_WORD2 SPARC_NOP 760 761 static int 762 sparc32_plt_entry_build (bfd *output_bfd, asection *splt, bfd_vma offset, 763 bfd_vma max ATTRIBUTE_UNUSED, 764 bfd_vma *r_offset) 765 { 766 bfd_put_32 (output_bfd, 767 PLT32_ENTRY_WORD0 + offset, 768 splt->contents + offset); 769 bfd_put_32 (output_bfd, 770 (PLT32_ENTRY_WORD1 771 + (((- (offset + 4)) >> 2) & 0x3fffff)), 772 splt->contents + offset + 4); 773 bfd_put_32 (output_bfd, (bfd_vma) PLT32_ENTRY_WORD2, 774 splt->contents + offset + 8); 775 776 *r_offset = offset; 777 778 return offset / PLT32_ENTRY_SIZE - 4; 779 } 780 781 /* Both the headers and the entries are icache aligned. */ 782 #define PLT64_ENTRY_SIZE 32 783 #define PLT64_HEADER_SIZE (4 * PLT64_ENTRY_SIZE) 784 #define PLT64_LARGE_THRESHOLD 32768 785 786 static int 787 sparc64_plt_entry_build (bfd *output_bfd, asection *splt, bfd_vma offset, 788 bfd_vma max, bfd_vma *r_offset) 789 { 790 unsigned char *entry = splt->contents + offset; 791 const unsigned int nop = SPARC_NOP; 792 int plt_index; 793 794 if (offset < (PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE)) 795 { 796 unsigned int sethi, ba; 797 798 *r_offset = offset; 799 800 plt_index = (offset / PLT64_ENTRY_SIZE); 801 802 sethi = 0x03000000 | (plt_index * PLT64_ENTRY_SIZE); 803 ba = 0x30680000 804 | (((splt->contents + PLT64_ENTRY_SIZE) - (entry + 4)) / 4 & 0x7ffff); 805 806 bfd_put_32 (output_bfd, (bfd_vma) sethi, entry); 807 bfd_put_32 (output_bfd, (bfd_vma) ba, entry + 4); 808 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 8); 809 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 12); 810 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 16); 811 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 20); 812 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 24); 813 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 28); 814 } 815 else 816 { 817 unsigned char *ptr; 818 unsigned int ldx; 819 int block, last_block, ofs, last_ofs, chunks_this_block; 820 const int insn_chunk_size = (6 * 4); 821 const int ptr_chunk_size = (1 * 8); 822 const int entries_per_block = 160; 823 const int block_size = entries_per_block * (insn_chunk_size 824 + ptr_chunk_size); 825 826 /* Entries 32768 and higher are grouped into blocks of 160. 827 The blocks are further subdivided into 160 sequences of 828 6 instructions and 160 pointers. If a block does not require 829 the full 160 entries, let's say it requires N, then there 830 will be N sequences of 6 instructions and N pointers. */ 831 832 offset -= (PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE); 833 max -= (PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE); 834 835 block = offset / block_size; 836 last_block = max / block_size; 837 if (block != last_block) 838 { 839 chunks_this_block = 160; 840 } 841 else 842 { 843 last_ofs = max % block_size; 844 chunks_this_block = last_ofs / (insn_chunk_size + ptr_chunk_size); 845 } 846 847 ofs = offset % block_size; 848 849 plt_index = (PLT64_LARGE_THRESHOLD + 850 (block * 160) + 851 (ofs / insn_chunk_size)); 852 853 ptr = splt->contents 854 + (PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE) 855 + (block * block_size) 856 + (chunks_this_block * insn_chunk_size) 857 + (ofs / insn_chunk_size) * ptr_chunk_size; 858 859 *r_offset = (bfd_vma) (ptr - splt->contents); 860 861 ldx = 0xc25be000 | ((ptr - (entry+4)) & 0x1fff); 862 863 /* mov %o7,%g5 864 call .+8 865 nop 866 ldx [%o7+P],%g1 867 jmpl %o7+%g1,%g1 868 mov %g5,%o7 */ 869 bfd_put_32 (output_bfd, (bfd_vma) 0x8a10000f, entry); 870 bfd_put_32 (output_bfd, (bfd_vma) 0x40000002, entry + 4); 871 bfd_put_32 (output_bfd, (bfd_vma) SPARC_NOP, entry + 8); 872 bfd_put_32 (output_bfd, (bfd_vma) ldx, entry + 12); 873 bfd_put_32 (output_bfd, (bfd_vma) 0x83c3c001, entry + 16); 874 bfd_put_32 (output_bfd, (bfd_vma) 0x9e100005, entry + 20); 875 876 bfd_put_64 (output_bfd, (bfd_vma) (splt->contents - (entry + 4)), ptr); 877 } 878 879 return plt_index - 4; 880 } 881 882 /* The format of the first PLT entry in a VxWorks executable. */ 883 static const bfd_vma sparc_vxworks_exec_plt0_entry[] = 884 { 885 0x05000000, /* sethi %hi(_GLOBAL_OFFSET_TABLE_+8), %g2 */ 886 0x8410a000, /* or %g2, %lo(_GLOBAL_OFFSET_TABLE_+8), %g2 */ 887 0xc4008000, /* ld [ %g2 ], %g2 */ 888 0x81c08000, /* jmp %g2 */ 889 0x01000000 /* nop */ 890 }; 891 892 /* The format of subsequent PLT entries. */ 893 static const bfd_vma sparc_vxworks_exec_plt_entry[] = 894 { 895 0x03000000, /* sethi %hi(_GLOBAL_OFFSET_TABLE_+f@got), %g1 */ 896 0x82106000, /* or %g1, %lo(_GLOBAL_OFFSET_TABLE_+f@got), %g1 */ 897 0xc2004000, /* ld [ %g1 ], %g1 */ 898 0x81c04000, /* jmp %g1 */ 899 0x01000000, /* nop */ 900 0x03000000, /* sethi %hi(f@pltindex), %g1 */ 901 0x10800000, /* b _PLT_resolve */ 902 0x82106000 /* or %g1, %lo(f@pltindex), %g1 */ 903 }; 904 905 /* The format of the first PLT entry in a VxWorks shared object. */ 906 static const bfd_vma sparc_vxworks_shared_plt0_entry[] = 907 { 908 0xc405e008, /* ld [ %l7 + 8 ], %g2 */ 909 0x81c08000, /* jmp %g2 */ 910 0x01000000 /* nop */ 911 }; 912 913 /* The format of subsequent PLT entries. */ 914 static const bfd_vma sparc_vxworks_shared_plt_entry[] = 915 { 916 0x03000000, /* sethi %hi(f@got), %g1 */ 917 0x82106000, /* or %g1, %lo(f@got), %g1 */ 918 0xc205c001, /* ld [ %l7 + %g1 ], %g1 */ 919 0x81c04000, /* jmp %g1 */ 920 0x01000000, /* nop */ 921 0x03000000, /* sethi %hi(f@pltindex), %g1 */ 922 0x10800000, /* b _PLT_resolve */ 923 0x82106000 /* or %g1, %lo(f@pltindex), %g1 */ 924 }; 925 926 #define SPARC_ELF_PUT_WORD(htab, bfd, val, ptr) \ 927 htab->put_word(bfd, val, ptr) 928 929 #define SPARC_ELF_R_INFO(htab, in_rel, index, type) \ 930 htab->r_info(in_rel, index, type) 931 932 #define SPARC_ELF_R_SYMNDX(htab, r_info) \ 933 htab->r_symndx(r_info) 934 935 #define SPARC_ELF_WORD_BYTES(htab) \ 936 htab->bytes_per_word 937 938 #define SPARC_ELF_RELA_BYTES(htab) \ 939 htab->bytes_per_rela 940 941 #define SPARC_ELF_DTPOFF_RELOC(htab) \ 942 htab->dtpoff_reloc 943 944 #define SPARC_ELF_DTPMOD_RELOC(htab) \ 945 htab->dtpmod_reloc 946 947 #define SPARC_ELF_TPOFF_RELOC(htab) \ 948 htab->tpoff_reloc 949 950 #define SPARC_ELF_BUILD_PLT_ENTRY(htab, obfd, splt, off, max, r_off) \ 951 htab->build_plt_entry (obfd, splt, off, max, r_off) 952 953 /* Create an entry in an SPARC ELF linker hash table. */ 954 955 static struct bfd_hash_entry * 956 link_hash_newfunc (struct bfd_hash_entry *entry, 957 struct bfd_hash_table *table, const char *string) 958 { 959 /* Allocate the structure if it has not already been allocated by a 960 subclass. */ 961 if (entry == NULL) 962 { 963 entry = bfd_hash_allocate (table, 964 sizeof (struct _bfd_sparc_elf_link_hash_entry)); 965 if (entry == NULL) 966 return entry; 967 } 968 969 /* Call the allocation method of the superclass. */ 970 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 971 if (entry != NULL) 972 { 973 struct _bfd_sparc_elf_link_hash_entry *eh; 974 975 eh = (struct _bfd_sparc_elf_link_hash_entry *) entry; 976 eh->dyn_relocs = NULL; 977 eh->tls_type = GOT_UNKNOWN; 978 } 979 980 return entry; 981 } 982 983 /* The name of the dynamic interpreter. This is put in the .interp 984 section. */ 985 986 #define ELF32_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 987 #define ELF64_DYNAMIC_INTERPRETER "/usr/lib/sparcv9/ld.so.1" 988 989 /* Compute a hash of a local hash entry. We use elf_link_hash_entry 990 for local symbol so that we can handle local STT_GNU_IFUNC symbols 991 as global symbol. We reuse indx and dynstr_index for local symbol 992 hash since they aren't used by global symbols in this backend. */ 993 994 static hashval_t 995 elf_sparc_local_htab_hash (const void *ptr) 996 { 997 struct elf_link_hash_entry *h 998 = (struct elf_link_hash_entry *) ptr; 999 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); 1000 } 1001 1002 /* Compare local hash entries. */ 1003 1004 static int 1005 elf_sparc_local_htab_eq (const void *ptr1, const void *ptr2) 1006 { 1007 struct elf_link_hash_entry *h1 1008 = (struct elf_link_hash_entry *) ptr1; 1009 struct elf_link_hash_entry *h2 1010 = (struct elf_link_hash_entry *) ptr2; 1011 1012 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; 1013 } 1014 1015 /* Find and/or create a hash entry for local symbol. */ 1016 1017 static struct elf_link_hash_entry * 1018 elf_sparc_get_local_sym_hash (struct _bfd_sparc_elf_link_hash_table *htab, 1019 bfd *abfd, const Elf_Internal_Rela *rel, 1020 bfd_boolean create) 1021 { 1022 struct _bfd_sparc_elf_link_hash_entry e, *ret; 1023 asection *sec = abfd->sections; 1024 unsigned long r_symndx; 1025 hashval_t h; 1026 void **slot; 1027 1028 r_symndx = SPARC_ELF_R_SYMNDX (htab, rel->r_info); 1029 h = ELF_LOCAL_SYMBOL_HASH (sec->id, r_symndx); 1030 1031 e.elf.indx = sec->id; 1032 e.elf.dynstr_index = r_symndx; 1033 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, 1034 create ? INSERT : NO_INSERT); 1035 1036 if (!slot) 1037 return NULL; 1038 1039 if (*slot) 1040 { 1041 ret = (struct _bfd_sparc_elf_link_hash_entry *) *slot; 1042 return &ret->elf; 1043 } 1044 1045 ret = (struct _bfd_sparc_elf_link_hash_entry *) 1046 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, 1047 sizeof (struct _bfd_sparc_elf_link_hash_entry)); 1048 if (ret) 1049 { 1050 memset (ret, 0, sizeof (*ret)); 1051 ret->elf.indx = sec->id; 1052 ret->elf.dynstr_index = r_symndx; 1053 ret->elf.dynindx = -1; 1054 ret->elf.plt.offset = (bfd_vma) -1; 1055 ret->elf.got.offset = (bfd_vma) -1; 1056 *slot = ret; 1057 } 1058 return &ret->elf; 1059 } 1060 1061 /* Create a SPARC ELF linker hash table. */ 1062 1063 struct bfd_link_hash_table * 1064 _bfd_sparc_elf_link_hash_table_create (bfd *abfd) 1065 { 1066 struct _bfd_sparc_elf_link_hash_table *ret; 1067 bfd_size_type amt = sizeof (struct _bfd_sparc_elf_link_hash_table); 1068 1069 ret = (struct _bfd_sparc_elf_link_hash_table *) bfd_zmalloc (amt); 1070 if (ret == NULL) 1071 return NULL; 1072 1073 if (ABI_64_P (abfd)) 1074 { 1075 ret->put_word = sparc_put_word_64; 1076 ret->r_info = sparc_elf_r_info_64; 1077 ret->r_symndx = sparc_elf_r_symndx_64; 1078 ret->dtpoff_reloc = R_SPARC_TLS_DTPOFF64; 1079 ret->dtpmod_reloc = R_SPARC_TLS_DTPMOD64; 1080 ret->tpoff_reloc = R_SPARC_TLS_TPOFF64; 1081 ret->word_align_power = 3; 1082 ret->align_power_max = 4; 1083 ret->bytes_per_word = 8; 1084 ret->bytes_per_rela = sizeof (Elf64_External_Rela); 1085 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; 1086 ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; 1087 1088 ret->build_plt_entry = sparc64_plt_entry_build; 1089 ret->plt_header_size = PLT64_HEADER_SIZE; 1090 ret->plt_entry_size = PLT64_ENTRY_SIZE; 1091 } 1092 else 1093 { 1094 ret->put_word = sparc_put_word_32; 1095 ret->r_info = sparc_elf_r_info_32; 1096 ret->r_symndx = sparc_elf_r_symndx_32; 1097 ret->dtpoff_reloc = R_SPARC_TLS_DTPOFF32; 1098 ret->dtpmod_reloc = R_SPARC_TLS_DTPMOD32; 1099 ret->tpoff_reloc = R_SPARC_TLS_TPOFF32; 1100 ret->word_align_power = 2; 1101 ret->align_power_max = 3; 1102 ret->bytes_per_word = 4; 1103 ret->bytes_per_rela = sizeof (Elf32_External_Rela); 1104 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; 1105 ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER; 1106 1107 ret->build_plt_entry = sparc32_plt_entry_build; 1108 ret->plt_header_size = PLT32_HEADER_SIZE; 1109 ret->plt_entry_size = PLT32_ENTRY_SIZE; 1110 } 1111 1112 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, 1113 sizeof (struct _bfd_sparc_elf_link_hash_entry), 1114 SPARC_ELF_DATA)) 1115 { 1116 free (ret); 1117 return NULL; 1118 } 1119 1120 ret->loc_hash_table = htab_try_create (1024, 1121 elf_sparc_local_htab_hash, 1122 elf_sparc_local_htab_eq, 1123 NULL); 1124 ret->loc_hash_memory = objalloc_create (); 1125 if (!ret->loc_hash_table || !ret->loc_hash_memory) 1126 { 1127 free (ret); 1128 return NULL; 1129 } 1130 1131 return &ret->elf.root; 1132 } 1133 1134 /* Destroy a SPARC ELF linker hash table. */ 1135 1136 void 1137 _bfd_sparc_elf_link_hash_table_free (struct bfd_link_hash_table *hash) 1138 { 1139 struct _bfd_sparc_elf_link_hash_table *htab 1140 = (struct _bfd_sparc_elf_link_hash_table *) hash; 1141 1142 if (htab->loc_hash_table) 1143 htab_delete (htab->loc_hash_table); 1144 if (htab->loc_hash_memory) 1145 objalloc_free ((struct objalloc *) htab->loc_hash_memory); 1146 _bfd_generic_link_hash_table_free (hash); 1147 } 1148 1149 /* Create .plt, .rela.plt, .got, .rela.got, .dynbss, and 1150 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our 1151 hash table. */ 1152 1153 bfd_boolean 1154 _bfd_sparc_elf_create_dynamic_sections (bfd *dynobj, 1155 struct bfd_link_info *info) 1156 { 1157 struct _bfd_sparc_elf_link_hash_table *htab; 1158 1159 htab = _bfd_sparc_elf_hash_table (info); 1160 BFD_ASSERT (htab != NULL); 1161 1162 if (!_bfd_elf_create_dynamic_sections (dynobj, info)) 1163 return FALSE; 1164 1165 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); 1166 if (!info->shared) 1167 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); 1168 1169 if (htab->is_vxworks) 1170 { 1171 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2)) 1172 return FALSE; 1173 if (info->shared) 1174 { 1175 htab->plt_header_size 1176 = 4 * ARRAY_SIZE (sparc_vxworks_shared_plt0_entry); 1177 htab->plt_entry_size 1178 = 4 * ARRAY_SIZE (sparc_vxworks_shared_plt_entry); 1179 } 1180 else 1181 { 1182 htab->plt_header_size 1183 = 4 * ARRAY_SIZE (sparc_vxworks_exec_plt0_entry); 1184 htab->plt_entry_size 1185 = 4 * ARRAY_SIZE (sparc_vxworks_exec_plt_entry); 1186 } 1187 } 1188 1189 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss 1190 || (!info->shared && !htab->srelbss)) 1191 abort (); 1192 1193 return TRUE; 1194 } 1195 1196 static bfd_boolean 1197 create_ifunc_sections (bfd *abfd, struct bfd_link_info *info) 1198 { 1199 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 1200 struct elf_link_hash_table *htab = elf_hash_table (info); 1201 flagword flags, pltflags; 1202 asection *s; 1203 1204 if (htab->irelifunc != NULL || htab->iplt != NULL) 1205 return TRUE; 1206 1207 flags = bed->dynamic_sec_flags; 1208 pltflags = flags | SEC_ALLOC | SEC_CODE | SEC_LOAD; 1209 1210 s = bfd_make_section_with_flags (abfd, ".iplt", pltflags); 1211 if (s == NULL 1212 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) 1213 return FALSE; 1214 htab->iplt = s; 1215 1216 s = bfd_make_section_with_flags (abfd, ".rela.iplt", 1217 flags | SEC_READONLY); 1218 if (s == NULL 1219 || ! bfd_set_section_alignment (abfd, s, 1220 bed->s->log_file_align)) 1221 return FALSE; 1222 htab->irelplt = s; 1223 1224 return TRUE; 1225 } 1226 1227 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 1228 1229 void 1230 _bfd_sparc_elf_copy_indirect_symbol (struct bfd_link_info *info, 1231 struct elf_link_hash_entry *dir, 1232 struct elf_link_hash_entry *ind) 1233 { 1234 struct _bfd_sparc_elf_link_hash_entry *edir, *eind; 1235 1236 edir = (struct _bfd_sparc_elf_link_hash_entry *) dir; 1237 eind = (struct _bfd_sparc_elf_link_hash_entry *) ind; 1238 1239 if (eind->dyn_relocs != NULL) 1240 { 1241 if (edir->dyn_relocs != NULL) 1242 { 1243 struct _bfd_sparc_elf_dyn_relocs **pp; 1244 struct _bfd_sparc_elf_dyn_relocs *p; 1245 1246 /* Add reloc counts against the indirect sym to the direct sym 1247 list. Merge any entries against the same section. */ 1248 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 1249 { 1250 struct _bfd_sparc_elf_dyn_relocs *q; 1251 1252 for (q = edir->dyn_relocs; q != NULL; q = q->next) 1253 if (q->sec == p->sec) 1254 { 1255 q->pc_count += p->pc_count; 1256 q->count += p->count; 1257 *pp = p->next; 1258 break; 1259 } 1260 if (q == NULL) 1261 pp = &p->next; 1262 } 1263 *pp = edir->dyn_relocs; 1264 } 1265 1266 edir->dyn_relocs = eind->dyn_relocs; 1267 eind->dyn_relocs = NULL; 1268 } 1269 1270 if (ind->root.type == bfd_link_hash_indirect 1271 && dir->got.refcount <= 0) 1272 { 1273 edir->tls_type = eind->tls_type; 1274 eind->tls_type = GOT_UNKNOWN; 1275 } 1276 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 1277 } 1278 1279 static int 1280 sparc_elf_tls_transition (struct bfd_link_info *info, bfd *abfd, 1281 int r_type, int is_local) 1282 { 1283 if (! ABI_64_P (abfd) 1284 && r_type == R_SPARC_TLS_GD_HI22 1285 && ! _bfd_sparc_elf_tdata (abfd)->has_tlsgd) 1286 r_type = R_SPARC_REV32; 1287 1288 if (info->shared) 1289 return r_type; 1290 1291 switch (r_type) 1292 { 1293 case R_SPARC_TLS_GD_HI22: 1294 if (is_local) 1295 return R_SPARC_TLS_LE_HIX22; 1296 return R_SPARC_TLS_IE_HI22; 1297 case R_SPARC_TLS_GD_LO10: 1298 if (is_local) 1299 return R_SPARC_TLS_LE_LOX10; 1300 return R_SPARC_TLS_IE_LO10; 1301 case R_SPARC_TLS_IE_HI22: 1302 if (is_local) 1303 return R_SPARC_TLS_LE_HIX22; 1304 return r_type; 1305 case R_SPARC_TLS_IE_LO10: 1306 if (is_local) 1307 return R_SPARC_TLS_LE_LOX10; 1308 return r_type; 1309 case R_SPARC_TLS_LDM_HI22: 1310 return R_SPARC_TLS_LE_HIX22; 1311 case R_SPARC_TLS_LDM_LO10: 1312 return R_SPARC_TLS_LE_LOX10; 1313 } 1314 1315 return r_type; 1316 } 1317 1318 /* Look through the relocs for a section during the first phase, and 1319 allocate space in the global offset table or procedure linkage 1320 table. */ 1321 1322 bfd_boolean 1323 _bfd_sparc_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, 1324 asection *sec, const Elf_Internal_Rela *relocs) 1325 { 1326 struct _bfd_sparc_elf_link_hash_table *htab; 1327 Elf_Internal_Shdr *symtab_hdr; 1328 struct elf_link_hash_entry **sym_hashes; 1329 const Elf_Internal_Rela *rel; 1330 const Elf_Internal_Rela *rel_end; 1331 asection *sreloc; 1332 int num_relocs; 1333 bfd_boolean checked_tlsgd = FALSE; 1334 1335 if (info->relocatable) 1336 return TRUE; 1337 1338 htab = _bfd_sparc_elf_hash_table (info); 1339 BFD_ASSERT (htab != NULL); 1340 symtab_hdr = &elf_symtab_hdr (abfd); 1341 sym_hashes = elf_sym_hashes (abfd); 1342 1343 sreloc = NULL; 1344 1345 if (ABI_64_P (abfd)) 1346 num_relocs = NUM_SHDR_ENTRIES (_bfd_elf_single_rel_hdr (sec)); 1347 else 1348 num_relocs = sec->reloc_count; 1349 1350 BFD_ASSERT (is_sparc_elf (abfd) || num_relocs == 0); 1351 1352 if (htab->elf.dynobj == NULL) 1353 htab->elf.dynobj = abfd; 1354 if (!create_ifunc_sections (htab->elf.dynobj, info)) 1355 return FALSE; 1356 1357 rel_end = relocs + num_relocs; 1358 for (rel = relocs; rel < rel_end; rel++) 1359 { 1360 unsigned int r_type; 1361 unsigned long r_symndx; 1362 struct elf_link_hash_entry *h; 1363 Elf_Internal_Sym *isym; 1364 1365 r_symndx = SPARC_ELF_R_SYMNDX (htab, rel->r_info); 1366 r_type = SPARC_ELF_R_TYPE (rel->r_info); 1367 1368 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) 1369 { 1370 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), 1371 abfd, r_symndx); 1372 return FALSE; 1373 } 1374 1375 isym = NULL; 1376 if (r_symndx < symtab_hdr->sh_info) 1377 { 1378 /* A local symbol. */ 1379 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 1380 abfd, r_symndx); 1381 if (isym == NULL) 1382 return FALSE; 1383 1384 /* Check relocation against local STT_GNU_IFUNC symbol. */ 1385 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 1386 { 1387 h = elf_sparc_get_local_sym_hash (htab, abfd, rel, 1388 TRUE); 1389 if (h == NULL) 1390 return FALSE; 1391 1392 /* Fake a STT_GNU_IFUNC symbol. */ 1393 h->type = STT_GNU_IFUNC; 1394 h->def_regular = 1; 1395 h->ref_regular = 1; 1396 h->forced_local = 1; 1397 h->root.type = bfd_link_hash_defined; 1398 } 1399 else 1400 h = NULL; 1401 } 1402 else 1403 { 1404 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1405 while (h->root.type == bfd_link_hash_indirect 1406 || h->root.type == bfd_link_hash_warning) 1407 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1408 } 1409 1410 if (h && h->type == STT_GNU_IFUNC) 1411 { 1412 if (h->def_regular) 1413 { 1414 h->ref_regular = 1; 1415 h->plt.refcount += 1; 1416 } 1417 } 1418 1419 /* Compatibility with old R_SPARC_REV32 reloc conflicting 1420 with R_SPARC_TLS_GD_HI22. */ 1421 if (! ABI_64_P (abfd) && ! checked_tlsgd) 1422 switch (r_type) 1423 { 1424 case R_SPARC_TLS_GD_HI22: 1425 { 1426 const Elf_Internal_Rela *relt; 1427 1428 for (relt = rel + 1; relt < rel_end; relt++) 1429 if (ELF32_R_TYPE (relt->r_info) == R_SPARC_TLS_GD_LO10 1430 || ELF32_R_TYPE (relt->r_info) == R_SPARC_TLS_GD_ADD 1431 || ELF32_R_TYPE (relt->r_info) == R_SPARC_TLS_GD_CALL) 1432 break; 1433 checked_tlsgd = TRUE; 1434 _bfd_sparc_elf_tdata (abfd)->has_tlsgd = relt < rel_end; 1435 } 1436 break; 1437 case R_SPARC_TLS_GD_LO10: 1438 case R_SPARC_TLS_GD_ADD: 1439 case R_SPARC_TLS_GD_CALL: 1440 checked_tlsgd = TRUE; 1441 _bfd_sparc_elf_tdata (abfd)->has_tlsgd = TRUE; 1442 break; 1443 } 1444 1445 r_type = sparc_elf_tls_transition (info, abfd, r_type, h == NULL); 1446 switch (r_type) 1447 { 1448 case R_SPARC_TLS_LDM_HI22: 1449 case R_SPARC_TLS_LDM_LO10: 1450 htab->tls_ldm_got.refcount += 1; 1451 break; 1452 1453 case R_SPARC_TLS_LE_HIX22: 1454 case R_SPARC_TLS_LE_LOX10: 1455 if (info->shared) 1456 goto r_sparc_plt32; 1457 break; 1458 1459 case R_SPARC_TLS_IE_HI22: 1460 case R_SPARC_TLS_IE_LO10: 1461 if (info->shared) 1462 info->flags |= DF_STATIC_TLS; 1463 /* Fall through */ 1464 1465 case R_SPARC_GOT10: 1466 case R_SPARC_GOT13: 1467 case R_SPARC_GOT22: 1468 case R_SPARC_GOTDATA_HIX22: 1469 case R_SPARC_GOTDATA_LOX10: 1470 case R_SPARC_GOTDATA_OP_HIX22: 1471 case R_SPARC_GOTDATA_OP_LOX10: 1472 case R_SPARC_TLS_GD_HI22: 1473 case R_SPARC_TLS_GD_LO10: 1474 /* This symbol requires a global offset table entry. */ 1475 { 1476 int tls_type, old_tls_type; 1477 1478 switch (r_type) 1479 { 1480 default: 1481 case R_SPARC_GOT10: 1482 case R_SPARC_GOT13: 1483 case R_SPARC_GOT22: 1484 case R_SPARC_GOTDATA_OP_HIX22: 1485 case R_SPARC_GOTDATA_OP_LOX10: 1486 tls_type = GOT_NORMAL; 1487 break; 1488 case R_SPARC_TLS_GD_HI22: 1489 case R_SPARC_TLS_GD_LO10: 1490 tls_type = GOT_TLS_GD; 1491 break; 1492 case R_SPARC_TLS_IE_HI22: 1493 case R_SPARC_TLS_IE_LO10: 1494 tls_type = GOT_TLS_IE; 1495 break; 1496 } 1497 1498 if (h != NULL) 1499 { 1500 h->got.refcount += 1; 1501 old_tls_type = _bfd_sparc_elf_hash_entry(h)->tls_type; 1502 } 1503 else 1504 { 1505 bfd_signed_vma *local_got_refcounts; 1506 1507 /* This is a global offset table entry for a local symbol. */ 1508 local_got_refcounts = elf_local_got_refcounts (abfd); 1509 if (local_got_refcounts == NULL) 1510 { 1511 bfd_size_type size; 1512 1513 size = symtab_hdr->sh_info; 1514 size *= (sizeof (bfd_signed_vma) + sizeof(char)); 1515 local_got_refcounts = ((bfd_signed_vma *) 1516 bfd_zalloc (abfd, size)); 1517 if (local_got_refcounts == NULL) 1518 return FALSE; 1519 elf_local_got_refcounts (abfd) = local_got_refcounts; 1520 _bfd_sparc_elf_local_got_tls_type (abfd) 1521 = (char *) (local_got_refcounts + symtab_hdr->sh_info); 1522 } 1523 switch (r_type) 1524 { 1525 case R_SPARC_GOTDATA_OP_HIX22: 1526 case R_SPARC_GOTDATA_OP_LOX10: 1527 break; 1528 1529 default: 1530 local_got_refcounts[r_symndx] += 1; 1531 break; 1532 } 1533 old_tls_type = _bfd_sparc_elf_local_got_tls_type (abfd) [r_symndx]; 1534 } 1535 1536 /* If a TLS symbol is accessed using IE at least once, 1537 there is no point to use dynamic model for it. */ 1538 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN 1539 && (old_tls_type != GOT_TLS_GD 1540 || tls_type != GOT_TLS_IE)) 1541 { 1542 if (old_tls_type == GOT_TLS_IE && tls_type == GOT_TLS_GD) 1543 tls_type = old_tls_type; 1544 else 1545 { 1546 (*_bfd_error_handler) 1547 (_("%B: `%s' accessed both as normal and thread local symbol"), 1548 abfd, h ? h->root.root.string : "<local>"); 1549 return FALSE; 1550 } 1551 } 1552 1553 if (old_tls_type != tls_type) 1554 { 1555 if (h != NULL) 1556 _bfd_sparc_elf_hash_entry (h)->tls_type = tls_type; 1557 else 1558 _bfd_sparc_elf_local_got_tls_type (abfd) [r_symndx] = tls_type; 1559 } 1560 } 1561 1562 if (htab->elf.sgot == NULL) 1563 { 1564 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) 1565 return FALSE; 1566 } 1567 break; 1568 1569 case R_SPARC_TLS_GD_CALL: 1570 case R_SPARC_TLS_LDM_CALL: 1571 if (info->shared) 1572 { 1573 /* These are basically R_SPARC_TLS_WPLT30 relocs against 1574 __tls_get_addr. */ 1575 struct bfd_link_hash_entry *bh = NULL; 1576 if (! _bfd_generic_link_add_one_symbol (info, abfd, 1577 "__tls_get_addr", 0, 1578 bfd_und_section_ptr, 0, 1579 NULL, FALSE, FALSE, 1580 &bh)) 1581 return FALSE; 1582 h = (struct elf_link_hash_entry *) bh; 1583 } 1584 else 1585 break; 1586 /* Fall through */ 1587 1588 case R_SPARC_PLT32: 1589 case R_SPARC_WPLT30: 1590 case R_SPARC_HIPLT22: 1591 case R_SPARC_LOPLT10: 1592 case R_SPARC_PCPLT32: 1593 case R_SPARC_PCPLT22: 1594 case R_SPARC_PCPLT10: 1595 case R_SPARC_PLT64: 1596 /* This symbol requires a procedure linkage table entry. We 1597 actually build the entry in adjust_dynamic_symbol, 1598 because this might be a case of linking PIC code without 1599 linking in any dynamic objects, in which case we don't 1600 need to generate a procedure linkage table after all. */ 1601 1602 if (h == NULL) 1603 { 1604 if (! ABI_64_P (abfd)) 1605 { 1606 /* The Solaris native assembler will generate a WPLT30 1607 reloc for a local symbol if you assemble a call from 1608 one section to another when using -K pic. We treat 1609 it as WDISP30. */ 1610 if (ELF32_R_TYPE (rel->r_info) == R_SPARC_PLT32) 1611 goto r_sparc_plt32; 1612 break; 1613 } 1614 /* PR 7027: We need similar behaviour for 64-bit binaries. */ 1615 else if (r_type == R_SPARC_WPLT30) 1616 break; 1617 1618 /* It does not make sense to have a procedure linkage 1619 table entry for a local symbol. */ 1620 bfd_set_error (bfd_error_bad_value); 1621 return FALSE; 1622 } 1623 1624 h->needs_plt = 1; 1625 1626 { 1627 int this_r_type; 1628 1629 this_r_type = SPARC_ELF_R_TYPE (rel->r_info); 1630 if (this_r_type == R_SPARC_PLT32 1631 || this_r_type == R_SPARC_PLT64) 1632 goto r_sparc_plt32; 1633 } 1634 h->plt.refcount += 1; 1635 break; 1636 1637 case R_SPARC_PC10: 1638 case R_SPARC_PC22: 1639 case R_SPARC_PC_HH22: 1640 case R_SPARC_PC_HM10: 1641 case R_SPARC_PC_LM22: 1642 if (h != NULL) 1643 h->non_got_ref = 1; 1644 1645 if (h != NULL 1646 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 1647 break; 1648 /* Fall through. */ 1649 1650 case R_SPARC_DISP8: 1651 case R_SPARC_DISP16: 1652 case R_SPARC_DISP32: 1653 case R_SPARC_DISP64: 1654 case R_SPARC_WDISP30: 1655 case R_SPARC_WDISP22: 1656 case R_SPARC_WDISP19: 1657 case R_SPARC_WDISP16: 1658 case R_SPARC_8: 1659 case R_SPARC_16: 1660 case R_SPARC_32: 1661 case R_SPARC_HI22: 1662 case R_SPARC_22: 1663 case R_SPARC_13: 1664 case R_SPARC_LO10: 1665 case R_SPARC_UA16: 1666 case R_SPARC_UA32: 1667 case R_SPARC_10: 1668 case R_SPARC_11: 1669 case R_SPARC_64: 1670 case R_SPARC_OLO10: 1671 case R_SPARC_HH22: 1672 case R_SPARC_HM10: 1673 case R_SPARC_LM22: 1674 case R_SPARC_7: 1675 case R_SPARC_5: 1676 case R_SPARC_6: 1677 case R_SPARC_HIX22: 1678 case R_SPARC_LOX10: 1679 case R_SPARC_H44: 1680 case R_SPARC_M44: 1681 case R_SPARC_L44: 1682 case R_SPARC_UA64: 1683 if (h != NULL) 1684 h->non_got_ref = 1; 1685 1686 r_sparc_plt32: 1687 if (h != NULL && !info->shared) 1688 { 1689 /* We may need a .plt entry if the function this reloc 1690 refers to is in a shared lib. */ 1691 h->plt.refcount += 1; 1692 } 1693 1694 /* If we are creating a shared library, and this is a reloc 1695 against a global symbol, or a non PC relative reloc 1696 against a local symbol, then we need to copy the reloc 1697 into the shared library. However, if we are linking with 1698 -Bsymbolic, we do not need to copy a reloc against a 1699 global symbol which is defined in an object we are 1700 including in the link (i.e., DEF_REGULAR is set). At 1701 this point we have not seen all the input files, so it is 1702 possible that DEF_REGULAR is not set now but will be set 1703 later (it is never cleared). In case of a weak definition, 1704 DEF_REGULAR may be cleared later by a strong definition in 1705 a shared library. We account for that possibility below by 1706 storing information in the relocs_copied field of the hash 1707 table entry. A similar situation occurs when creating 1708 shared libraries and symbol visibility changes render the 1709 symbol local. 1710 1711 If on the other hand, we are creating an executable, we 1712 may need to keep relocations for symbols satisfied by a 1713 dynamic library if we manage to avoid copy relocs for the 1714 symbol. */ 1715 if ((info->shared 1716 && (sec->flags & SEC_ALLOC) != 0 1717 && (! _bfd_sparc_elf_howto_table[r_type].pc_relative 1718 || (h != NULL 1719 && (! SYMBOLIC_BIND (info, h) 1720 || h->root.type == bfd_link_hash_defweak 1721 || !h->def_regular)))) 1722 || (!info->shared 1723 && (sec->flags & SEC_ALLOC) != 0 1724 && h != NULL 1725 && (h->root.type == bfd_link_hash_defweak 1726 || !h->def_regular)) 1727 || (!info->shared 1728 && h != NULL 1729 && h->type == STT_GNU_IFUNC)) 1730 { 1731 struct _bfd_sparc_elf_dyn_relocs *p; 1732 struct _bfd_sparc_elf_dyn_relocs **head; 1733 1734 /* When creating a shared object, we must copy these 1735 relocs into the output file. We create a reloc 1736 section in dynobj and make room for the reloc. */ 1737 if (sreloc == NULL) 1738 { 1739 sreloc = _bfd_elf_make_dynamic_reloc_section 1740 (sec, htab->elf.dynobj, htab->word_align_power, 1741 abfd, /*rela?*/ TRUE); 1742 1743 if (sreloc == NULL) 1744 return FALSE; 1745 } 1746 1747 /* If this is a global symbol, we count the number of 1748 relocations we need for this symbol. */ 1749 if (h != NULL) 1750 head = &((struct _bfd_sparc_elf_link_hash_entry *) h)->dyn_relocs; 1751 else 1752 { 1753 /* Track dynamic relocs needed for local syms too. 1754 We really need local syms available to do this 1755 easily. Oh well. */ 1756 asection *s; 1757 void *vpp; 1758 1759 BFD_ASSERT (isym != NULL); 1760 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 1761 if (s == NULL) 1762 s = sec; 1763 1764 vpp = &elf_section_data (s)->local_dynrel; 1765 head = (struct _bfd_sparc_elf_dyn_relocs **) vpp; 1766 } 1767 1768 p = *head; 1769 if (p == NULL || p->sec != sec) 1770 { 1771 bfd_size_type amt = sizeof *p; 1772 p = ((struct _bfd_sparc_elf_dyn_relocs *) 1773 bfd_alloc (htab->elf.dynobj, amt)); 1774 if (p == NULL) 1775 return FALSE; 1776 p->next = *head; 1777 *head = p; 1778 p->sec = sec; 1779 p->count = 0; 1780 p->pc_count = 0; 1781 } 1782 1783 p->count += 1; 1784 if (_bfd_sparc_elf_howto_table[r_type].pc_relative) 1785 p->pc_count += 1; 1786 } 1787 1788 break; 1789 1790 case R_SPARC_GNU_VTINHERIT: 1791 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1792 return FALSE; 1793 break; 1794 1795 case R_SPARC_GNU_VTENTRY: 1796 BFD_ASSERT (h != NULL); 1797 if (h != NULL 1798 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1799 return FALSE; 1800 break; 1801 1802 case R_SPARC_REGISTER: 1803 /* Nothing to do. */ 1804 break; 1805 1806 default: 1807 break; 1808 } 1809 } 1810 1811 return TRUE; 1812 } 1813 1814 asection * 1815 _bfd_sparc_elf_gc_mark_hook (asection *sec, 1816 struct bfd_link_info *info, 1817 Elf_Internal_Rela *rel, 1818 struct elf_link_hash_entry *h, 1819 Elf_Internal_Sym *sym) 1820 { 1821 if (h != NULL) 1822 switch (SPARC_ELF_R_TYPE (rel->r_info)) 1823 { 1824 case R_SPARC_GNU_VTINHERIT: 1825 case R_SPARC_GNU_VTENTRY: 1826 return NULL; 1827 } 1828 1829 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1830 } 1831 1832 /* Update the got entry reference counts for the section being removed. */ 1833 bfd_boolean 1834 _bfd_sparc_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, 1835 asection *sec, const Elf_Internal_Rela *relocs) 1836 { 1837 struct _bfd_sparc_elf_link_hash_table *htab; 1838 Elf_Internal_Shdr *symtab_hdr; 1839 struct elf_link_hash_entry **sym_hashes; 1840 bfd_signed_vma *local_got_refcounts; 1841 const Elf_Internal_Rela *rel, *relend; 1842 1843 if (info->relocatable) 1844 return TRUE; 1845 1846 BFD_ASSERT (is_sparc_elf (abfd) || sec->reloc_count == 0); 1847 1848 elf_section_data (sec)->local_dynrel = NULL; 1849 1850 htab = _bfd_sparc_elf_hash_table (info); 1851 BFD_ASSERT (htab != NULL); 1852 symtab_hdr = &elf_symtab_hdr (abfd); 1853 sym_hashes = elf_sym_hashes (abfd); 1854 local_got_refcounts = elf_local_got_refcounts (abfd); 1855 1856 relend = relocs + sec->reloc_count; 1857 for (rel = relocs; rel < relend; rel++) 1858 { 1859 unsigned long r_symndx; 1860 unsigned int r_type; 1861 struct elf_link_hash_entry *h = NULL; 1862 1863 r_symndx = SPARC_ELF_R_SYMNDX (htab, rel->r_info); 1864 if (r_symndx >= symtab_hdr->sh_info) 1865 { 1866 struct _bfd_sparc_elf_link_hash_entry *eh; 1867 struct _bfd_sparc_elf_dyn_relocs **pp; 1868 struct _bfd_sparc_elf_dyn_relocs *p; 1869 1870 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1871 while (h->root.type == bfd_link_hash_indirect 1872 || h->root.type == bfd_link_hash_warning) 1873 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1874 eh = (struct _bfd_sparc_elf_link_hash_entry *) h; 1875 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 1876 if (p->sec == sec) 1877 { 1878 /* Everything must go for SEC. */ 1879 *pp = p->next; 1880 break; 1881 } 1882 } 1883 1884 r_type = SPARC_ELF_R_TYPE (rel->r_info); 1885 r_type = sparc_elf_tls_transition (info, abfd, r_type, h != NULL); 1886 switch (r_type) 1887 { 1888 case R_SPARC_TLS_LDM_HI22: 1889 case R_SPARC_TLS_LDM_LO10: 1890 if (_bfd_sparc_elf_hash_table (info)->tls_ldm_got.refcount > 0) 1891 _bfd_sparc_elf_hash_table (info)->tls_ldm_got.refcount -= 1; 1892 break; 1893 1894 case R_SPARC_TLS_GD_HI22: 1895 case R_SPARC_TLS_GD_LO10: 1896 case R_SPARC_TLS_IE_HI22: 1897 case R_SPARC_TLS_IE_LO10: 1898 case R_SPARC_GOT10: 1899 case R_SPARC_GOT13: 1900 case R_SPARC_GOT22: 1901 case R_SPARC_GOTDATA_HIX22: 1902 case R_SPARC_GOTDATA_LOX10: 1903 case R_SPARC_GOTDATA_OP_HIX22: 1904 case R_SPARC_GOTDATA_OP_LOX10: 1905 if (h != NULL) 1906 { 1907 if (h->got.refcount > 0) 1908 h->got.refcount--; 1909 } 1910 else 1911 { 1912 switch (r_type) 1913 { 1914 case R_SPARC_GOTDATA_OP_HIX22: 1915 case R_SPARC_GOTDATA_OP_LOX10: 1916 break; 1917 1918 default: 1919 if (local_got_refcounts[r_symndx] > 0) 1920 local_got_refcounts[r_symndx]--; 1921 break; 1922 } 1923 } 1924 break; 1925 1926 case R_SPARC_PC10: 1927 case R_SPARC_PC22: 1928 case R_SPARC_PC_HH22: 1929 case R_SPARC_PC_HM10: 1930 case R_SPARC_PC_LM22: 1931 if (h != NULL 1932 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 1933 break; 1934 /* Fall through. */ 1935 1936 case R_SPARC_DISP8: 1937 case R_SPARC_DISP16: 1938 case R_SPARC_DISP32: 1939 case R_SPARC_DISP64: 1940 case R_SPARC_WDISP30: 1941 case R_SPARC_WDISP22: 1942 case R_SPARC_WDISP19: 1943 case R_SPARC_WDISP16: 1944 case R_SPARC_8: 1945 case R_SPARC_16: 1946 case R_SPARC_32: 1947 case R_SPARC_HI22: 1948 case R_SPARC_22: 1949 case R_SPARC_13: 1950 case R_SPARC_LO10: 1951 case R_SPARC_UA16: 1952 case R_SPARC_UA32: 1953 case R_SPARC_PLT32: 1954 case R_SPARC_10: 1955 case R_SPARC_11: 1956 case R_SPARC_64: 1957 case R_SPARC_OLO10: 1958 case R_SPARC_HH22: 1959 case R_SPARC_HM10: 1960 case R_SPARC_LM22: 1961 case R_SPARC_7: 1962 case R_SPARC_5: 1963 case R_SPARC_6: 1964 case R_SPARC_HIX22: 1965 case R_SPARC_LOX10: 1966 case R_SPARC_H44: 1967 case R_SPARC_M44: 1968 case R_SPARC_L44: 1969 case R_SPARC_UA64: 1970 if (info->shared) 1971 break; 1972 /* Fall through. */ 1973 1974 case R_SPARC_WPLT30: 1975 if (h != NULL) 1976 { 1977 if (h->plt.refcount > 0) 1978 h->plt.refcount--; 1979 } 1980 break; 1981 1982 default: 1983 break; 1984 } 1985 } 1986 1987 return TRUE; 1988 } 1989 1990 /* Adjust a symbol defined by a dynamic object and referenced by a 1991 regular object. The current definition is in some section of the 1992 dynamic object, but we're not including those sections. We have to 1993 change the definition to something the rest of the link can 1994 understand. */ 1995 1996 bfd_boolean 1997 _bfd_sparc_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 1998 struct elf_link_hash_entry *h) 1999 { 2000 struct _bfd_sparc_elf_link_hash_table *htab; 2001 struct _bfd_sparc_elf_link_hash_entry * eh; 2002 struct _bfd_sparc_elf_dyn_relocs *p; 2003 asection *s; 2004 2005 htab = _bfd_sparc_elf_hash_table (info); 2006 BFD_ASSERT (htab != NULL); 2007 2008 /* Make sure we know what is going on here. */ 2009 BFD_ASSERT (htab->elf.dynobj != NULL 2010 && (h->needs_plt 2011 || h->type == STT_GNU_IFUNC 2012 || h->u.weakdef != NULL 2013 || (h->def_dynamic 2014 && h->ref_regular 2015 && !h->def_regular))); 2016 2017 /* If this is a function, put it in the procedure linkage table. We 2018 will fill in the contents of the procedure linkage table later 2019 (although we could actually do it here). The STT_NOTYPE 2020 condition is a hack specifically for the Oracle libraries 2021 delivered for Solaris; for some inexplicable reason, they define 2022 some of their functions as STT_NOTYPE when they really should be 2023 STT_FUNC. */ 2024 if (h->type == STT_FUNC 2025 || h->type == STT_GNU_IFUNC 2026 || h->needs_plt 2027 || (h->type == STT_NOTYPE 2028 && (h->root.type == bfd_link_hash_defined 2029 || h->root.type == bfd_link_hash_defweak) 2030 && (h->root.u.def.section->flags & SEC_CODE) != 0)) 2031 { 2032 if (h->plt.refcount <= 0 2033 || (h->type != STT_GNU_IFUNC 2034 && (SYMBOL_CALLS_LOCAL (info, h) 2035 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 2036 && h->root.type == bfd_link_hash_undefweak)))) 2037 { 2038 /* This case can occur if we saw a WPLT30 reloc in an input 2039 file, but the symbol was never referred to by a dynamic 2040 object, or if all references were garbage collected. In 2041 such a case, we don't actually need to build a procedure 2042 linkage table, and we can just do a WDISP30 reloc instead. */ 2043 h->plt.offset = (bfd_vma) -1; 2044 h->needs_plt = 0; 2045 } 2046 2047 return TRUE; 2048 } 2049 else 2050 h->plt.offset = (bfd_vma) -1; 2051 2052 /* If this is a weak symbol, and there is a real definition, the 2053 processor independent code will have arranged for us to see the 2054 real definition first, and we can just use the same value. */ 2055 if (h->u.weakdef != NULL) 2056 { 2057 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 2058 || h->u.weakdef->root.type == bfd_link_hash_defweak); 2059 h->root.u.def.section = h->u.weakdef->root.u.def.section; 2060 h->root.u.def.value = h->u.weakdef->root.u.def.value; 2061 return TRUE; 2062 } 2063 2064 /* This is a reference to a symbol defined by a dynamic object which 2065 is not a function. */ 2066 2067 /* If we are creating a shared library, we must presume that the 2068 only references to the symbol are via the global offset table. 2069 For such cases we need not do anything here; the relocations will 2070 be handled correctly by relocate_section. */ 2071 if (info->shared) 2072 return TRUE; 2073 2074 /* If there are no references to this symbol that do not use the 2075 GOT, we don't need to generate a copy reloc. */ 2076 if (!h->non_got_ref) 2077 return TRUE; 2078 2079 /* If -z nocopyreloc was given, we won't generate them either. */ 2080 if (info->nocopyreloc) 2081 { 2082 h->non_got_ref = 0; 2083 return TRUE; 2084 } 2085 2086 eh = (struct _bfd_sparc_elf_link_hash_entry *) h; 2087 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2088 { 2089 s = p->sec->output_section; 2090 if (s != NULL && (s->flags & SEC_READONLY) != 0) 2091 break; 2092 } 2093 2094 /* If we didn't find any dynamic relocs in read-only sections, then 2095 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 2096 if (p == NULL) 2097 { 2098 h->non_got_ref = 0; 2099 return TRUE; 2100 } 2101 2102 if (h->size == 0) 2103 { 2104 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), 2105 h->root.root.string); 2106 return TRUE; 2107 } 2108 2109 /* We must allocate the symbol in our .dynbss section, which will 2110 become part of the .bss section of the executable. There will be 2111 an entry for this symbol in the .dynsym section. The dynamic 2112 object will contain position independent code, so all references 2113 from the dynamic object to this symbol will go through the global 2114 offset table. The dynamic linker will use the .dynsym entry to 2115 determine the address it must put in the global offset table, so 2116 both the dynamic object and the regular object will refer to the 2117 same memory location for the variable. */ 2118 2119 /* We must generate a R_SPARC_COPY reloc to tell the dynamic linker 2120 to copy the initial value out of the dynamic object and into the 2121 runtime process image. We need to remember the offset into the 2122 .rel.bss section we are going to use. */ 2123 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) 2124 { 2125 htab->srelbss->size += SPARC_ELF_RELA_BYTES (htab); 2126 h->needs_copy = 1; 2127 } 2128 2129 s = htab->sdynbss; 2130 2131 return _bfd_elf_adjust_dynamic_copy (h, s); 2132 } 2133 2134 /* Allocate space in .plt, .got and associated reloc sections for 2135 dynamic relocs. */ 2136 2137 static bfd_boolean 2138 allocate_dynrelocs (struct elf_link_hash_entry *h, PTR inf) 2139 { 2140 struct bfd_link_info *info; 2141 struct _bfd_sparc_elf_link_hash_table *htab; 2142 struct _bfd_sparc_elf_link_hash_entry *eh; 2143 struct _bfd_sparc_elf_dyn_relocs *p; 2144 2145 if (h->root.type == bfd_link_hash_indirect) 2146 return TRUE; 2147 2148 if (h->root.type == bfd_link_hash_warning) 2149 /* When warning symbols are created, they **replace** the "real" 2150 entry in the hash table, thus we never get to see the real 2151 symbol in a hash traversal. So look at it now. */ 2152 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2153 2154 info = (struct bfd_link_info *) inf; 2155 htab = _bfd_sparc_elf_hash_table (info); 2156 BFD_ASSERT (htab != NULL); 2157 2158 if ((htab->elf.dynamic_sections_created 2159 && h->plt.refcount > 0) 2160 || (h->type == STT_GNU_IFUNC 2161 && h->def_regular 2162 && h->ref_regular)) 2163 { 2164 /* Make sure this symbol is output as a dynamic symbol. 2165 Undefined weak syms won't yet be marked as dynamic. */ 2166 if (h->dynindx == -1 2167 && !h->forced_local) 2168 { 2169 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2170 return FALSE; 2171 } 2172 2173 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h) 2174 || (h->type == STT_GNU_IFUNC 2175 && h->def_regular)) 2176 { 2177 asection *s = htab->elf.splt; 2178 2179 if (s == NULL) 2180 s = htab->elf.iplt; 2181 2182 /* Allocate room for the header. */ 2183 if (s->size == 0) 2184 { 2185 s->size = htab->plt_header_size; 2186 2187 /* Allocate space for the .rela.plt.unloaded relocations. */ 2188 if (htab->is_vxworks && !info->shared) 2189 htab->srelplt2->size = sizeof (Elf32_External_Rela) * 2; 2190 } 2191 2192 /* The procedure linkage table size is bounded by the magnitude 2193 of the offset we can describe in the entry. */ 2194 if (s->size >= (SPARC_ELF_WORD_BYTES(htab) == 8 ? 2195 (((bfd_vma)1 << 31) << 1) : 0x400000)) 2196 { 2197 bfd_set_error (bfd_error_bad_value); 2198 return FALSE; 2199 } 2200 2201 if (SPARC_ELF_WORD_BYTES(htab) == 8 2202 && s->size >= PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE) 2203 { 2204 bfd_vma off = s->size - PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE; 2205 2206 2207 off = (off % (160 * PLT64_ENTRY_SIZE)) / PLT64_ENTRY_SIZE; 2208 2209 h->plt.offset = (s->size - (off * 8)); 2210 } 2211 else 2212 h->plt.offset = s->size; 2213 2214 /* If this symbol is not defined in a regular file, and we are 2215 not generating a shared library, then set the symbol to this 2216 location in the .plt. This is required to make function 2217 pointers compare as equal between the normal executable and 2218 the shared library. */ 2219 if (! info->shared 2220 && !h->def_regular) 2221 { 2222 h->root.u.def.section = s; 2223 h->root.u.def.value = h->plt.offset; 2224 } 2225 2226 /* Make room for this entry. */ 2227 s->size += htab->plt_entry_size; 2228 2229 /* We also need to make an entry in the .rela.plt section. */ 2230 if (s == htab->elf.splt) 2231 htab->elf.srelplt->size += SPARC_ELF_RELA_BYTES (htab); 2232 else 2233 htab->elf.irelplt->size += SPARC_ELF_RELA_BYTES (htab); 2234 2235 if (htab->is_vxworks) 2236 { 2237 /* Allocate space for the .got.plt entry. */ 2238 htab->elf.sgotplt->size += 4; 2239 2240 /* ...and for the .rela.plt.unloaded relocations. */ 2241 if (!info->shared) 2242 htab->srelplt2->size += sizeof (Elf32_External_Rela) * 3; 2243 } 2244 } 2245 else 2246 { 2247 h->plt.offset = (bfd_vma) -1; 2248 h->needs_plt = 0; 2249 } 2250 } 2251 else 2252 { 2253 h->plt.offset = (bfd_vma) -1; 2254 h->needs_plt = 0; 2255 } 2256 2257 /* If R_SPARC_TLS_IE_{HI22,LO10} symbol is now local to the binary, 2258 make it a R_SPARC_TLS_LE_{HI22,LO10} requiring no TLS entry. */ 2259 if (h->got.refcount > 0 2260 && !info->shared 2261 && h->dynindx == -1 2262 && _bfd_sparc_elf_hash_entry(h)->tls_type == GOT_TLS_IE) 2263 h->got.offset = (bfd_vma) -1; 2264 else if (h->got.refcount > 0) 2265 { 2266 asection *s; 2267 bfd_boolean dyn; 2268 int tls_type = _bfd_sparc_elf_hash_entry(h)->tls_type; 2269 2270 /* Make sure this symbol is output as a dynamic symbol. 2271 Undefined weak syms won't yet be marked as dynamic. */ 2272 if (h->dynindx == -1 2273 && !h->forced_local) 2274 { 2275 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2276 return FALSE; 2277 } 2278 2279 s = htab->elf.sgot; 2280 h->got.offset = s->size; 2281 s->size += SPARC_ELF_WORD_BYTES (htab); 2282 /* R_SPARC_TLS_GD_HI{22,LO10} needs 2 consecutive GOT slots. */ 2283 if (tls_type == GOT_TLS_GD) 2284 s->size += SPARC_ELF_WORD_BYTES (htab); 2285 dyn = htab->elf.dynamic_sections_created; 2286 /* R_SPARC_TLS_IE_{HI22,LO10} needs one dynamic relocation, 2287 R_SPARC_TLS_GD_{HI22,LO10} needs one if local symbol and two if 2288 global. */ 2289 if ((tls_type == GOT_TLS_GD && h->dynindx == -1) 2290 || tls_type == GOT_TLS_IE 2291 || h->type == STT_GNU_IFUNC) 2292 htab->elf.srelgot->size += SPARC_ELF_RELA_BYTES (htab); 2293 else if (tls_type == GOT_TLS_GD) 2294 htab->elf.srelgot->size += 2 * SPARC_ELF_RELA_BYTES (htab); 2295 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)) 2296 htab->elf.srelgot->size += SPARC_ELF_RELA_BYTES (htab); 2297 } 2298 else 2299 h->got.offset = (bfd_vma) -1; 2300 2301 eh = (struct _bfd_sparc_elf_link_hash_entry *) h; 2302 if (eh->dyn_relocs == NULL) 2303 return TRUE; 2304 2305 /* In the shared -Bsymbolic case, discard space allocated for 2306 dynamic pc-relative relocs against symbols which turn out to be 2307 defined in regular objects. For the normal shared case, discard 2308 space for pc-relative relocs that have become local due to symbol 2309 visibility changes. */ 2310 2311 if (info->shared) 2312 { 2313 if (SYMBOL_CALLS_LOCAL (info, h)) 2314 { 2315 struct _bfd_sparc_elf_dyn_relocs **pp; 2316 2317 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 2318 { 2319 p->count -= p->pc_count; 2320 p->pc_count = 0; 2321 if (p->count == 0) 2322 *pp = p->next; 2323 else 2324 pp = &p->next; 2325 } 2326 } 2327 2328 if (htab->is_vxworks) 2329 { 2330 struct _bfd_sparc_elf_dyn_relocs **pp; 2331 2332 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 2333 { 2334 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) 2335 *pp = p->next; 2336 else 2337 pp = &p->next; 2338 } 2339 } 2340 2341 /* Also discard relocs on undefined weak syms with non-default 2342 visibility. */ 2343 if (eh->dyn_relocs != NULL 2344 && h->root.type == bfd_link_hash_undefweak) 2345 { 2346 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 2347 eh->dyn_relocs = NULL; 2348 2349 /* Make sure undefined weak symbols are output as a dynamic 2350 symbol in PIEs. */ 2351 else if (h->dynindx == -1 2352 && !h->forced_local) 2353 { 2354 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2355 return FALSE; 2356 } 2357 } 2358 } 2359 else 2360 { 2361 /* For the non-shared case, discard space for relocs against 2362 symbols which turn out to need copy relocs or are not 2363 dynamic. */ 2364 2365 if (!h->non_got_ref 2366 && ((h->def_dynamic 2367 && !h->def_regular) 2368 || (htab->elf.dynamic_sections_created 2369 && (h->root.type == bfd_link_hash_undefweak 2370 || h->root.type == bfd_link_hash_undefined)))) 2371 { 2372 /* Make sure this symbol is output as a dynamic symbol. 2373 Undefined weak syms won't yet be marked as dynamic. */ 2374 if (h->dynindx == -1 2375 && !h->forced_local) 2376 { 2377 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2378 return FALSE; 2379 } 2380 2381 /* If that succeeded, we know we'll be keeping all the 2382 relocs. */ 2383 if (h->dynindx != -1) 2384 goto keep; 2385 } 2386 2387 eh->dyn_relocs = NULL; 2388 2389 keep: ; 2390 } 2391 2392 /* Finally, allocate space. */ 2393 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2394 { 2395 asection *sreloc = elf_section_data (p->sec)->sreloc; 2396 sreloc->size += p->count * SPARC_ELF_RELA_BYTES (htab); 2397 } 2398 2399 return TRUE; 2400 } 2401 2402 /* Allocate space in .plt, .got and associated reloc sections for 2403 local dynamic relocs. */ 2404 2405 static bfd_boolean 2406 allocate_local_dynrelocs (void **slot, void *inf) 2407 { 2408 struct elf_link_hash_entry *h 2409 = (struct elf_link_hash_entry *) *slot; 2410 2411 if (h->type != STT_GNU_IFUNC 2412 || !h->def_regular 2413 || !h->ref_regular 2414 || !h->forced_local 2415 || h->root.type != bfd_link_hash_defined) 2416 abort (); 2417 2418 return allocate_dynrelocs (h, inf); 2419 } 2420 2421 /* Find any dynamic relocs that apply to read-only sections. */ 2422 2423 static bfd_boolean 2424 readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf) 2425 { 2426 struct _bfd_sparc_elf_link_hash_entry *eh; 2427 struct _bfd_sparc_elf_dyn_relocs *p; 2428 2429 if (h->root.type == bfd_link_hash_warning) 2430 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2431 2432 eh = (struct _bfd_sparc_elf_link_hash_entry *) h; 2433 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2434 { 2435 asection *s = p->sec->output_section; 2436 2437 if (s != NULL && (s->flags & SEC_READONLY) != 0) 2438 { 2439 struct bfd_link_info *info = (struct bfd_link_info *) inf; 2440 2441 if (info->warn_shared_textrel) 2442 (*_bfd_error_handler) 2443 (_("warning: dynamic relocation in readonly section `%s'"), 2444 h->root.root.string); 2445 info->flags |= DF_TEXTREL; 2446 2447 /* Not an error, just cut short the traversal. */ 2448 return FALSE; 2449 } 2450 } 2451 return TRUE; 2452 } 2453 2454 /* Return true if the dynamic symbol for a given section should be 2455 omitted when creating a shared library. */ 2456 2457 bfd_boolean 2458 _bfd_sparc_elf_omit_section_dynsym (bfd *output_bfd, 2459 struct bfd_link_info *info, 2460 asection *p) 2461 { 2462 /* We keep the .got section symbol so that explicit relocations 2463 against the _GLOBAL_OFFSET_TABLE_ symbol emitted in PIC mode 2464 can be turned into relocations against the .got symbol. */ 2465 if (strcmp (p->name, ".got") == 0) 2466 return FALSE; 2467 2468 return _bfd_elf_link_omit_section_dynsym (output_bfd, info, p); 2469 } 2470 2471 /* Set the sizes of the dynamic sections. */ 2472 2473 bfd_boolean 2474 _bfd_sparc_elf_size_dynamic_sections (bfd *output_bfd, 2475 struct bfd_link_info *info) 2476 { 2477 struct _bfd_sparc_elf_link_hash_table *htab; 2478 bfd *dynobj; 2479 asection *s; 2480 bfd *ibfd; 2481 2482 htab = _bfd_sparc_elf_hash_table (info); 2483 BFD_ASSERT (htab != NULL); 2484 dynobj = htab->elf.dynobj; 2485 BFD_ASSERT (dynobj != NULL); 2486 2487 if (elf_hash_table (info)->dynamic_sections_created) 2488 { 2489 /* Set the contents of the .interp section to the interpreter. */ 2490 if (info->executable) 2491 { 2492 s = bfd_get_section_by_name (dynobj, ".interp"); 2493 BFD_ASSERT (s != NULL); 2494 s->size = htab->dynamic_interpreter_size; 2495 s->contents = (unsigned char *) htab->dynamic_interpreter; 2496 } 2497 } 2498 2499 /* Set up .got offsets for local syms, and space for local dynamic 2500 relocs. */ 2501 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 2502 { 2503 bfd_signed_vma *local_got; 2504 bfd_signed_vma *end_local_got; 2505 char *local_tls_type; 2506 bfd_size_type locsymcount; 2507 Elf_Internal_Shdr *symtab_hdr; 2508 asection *srel; 2509 2510 if (! is_sparc_elf (ibfd)) 2511 continue; 2512 2513 for (s = ibfd->sections; s != NULL; s = s->next) 2514 { 2515 struct _bfd_sparc_elf_dyn_relocs *p; 2516 2517 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) 2518 { 2519 if (!bfd_is_abs_section (p->sec) 2520 && bfd_is_abs_section (p->sec->output_section)) 2521 { 2522 /* Input section has been discarded, either because 2523 it is a copy of a linkonce section or due to 2524 linker script /DISCARD/, so we'll be discarding 2525 the relocs too. */ 2526 } 2527 else if (htab->is_vxworks 2528 && strcmp (p->sec->output_section->name, 2529 ".tls_vars") == 0) 2530 { 2531 /* Relocations in vxworks .tls_vars sections are 2532 handled specially by the loader. */ 2533 } 2534 else if (p->count != 0) 2535 { 2536 srel = elf_section_data (p->sec)->sreloc; 2537 if (!htab->elf.dynamic_sections_created) 2538 srel = htab->elf.irelplt; 2539 srel->size += p->count * SPARC_ELF_RELA_BYTES (htab); 2540 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2541 info->flags |= DF_TEXTREL; 2542 } 2543 } 2544 } 2545 2546 local_got = elf_local_got_refcounts (ibfd); 2547 if (!local_got) 2548 continue; 2549 2550 symtab_hdr = &elf_symtab_hdr (ibfd); 2551 locsymcount = symtab_hdr->sh_info; 2552 end_local_got = local_got + locsymcount; 2553 local_tls_type = _bfd_sparc_elf_local_got_tls_type (ibfd); 2554 s = htab->elf.sgot; 2555 srel = htab->elf.srelgot; 2556 for (; local_got < end_local_got; ++local_got, ++local_tls_type) 2557 { 2558 if (*local_got > 0) 2559 { 2560 *local_got = s->size; 2561 s->size += SPARC_ELF_WORD_BYTES (htab); 2562 if (*local_tls_type == GOT_TLS_GD) 2563 s->size += SPARC_ELF_WORD_BYTES (htab); 2564 if (info->shared 2565 || *local_tls_type == GOT_TLS_GD 2566 || *local_tls_type == GOT_TLS_IE) 2567 srel->size += SPARC_ELF_RELA_BYTES (htab); 2568 } 2569 else 2570 *local_got = (bfd_vma) -1; 2571 } 2572 } 2573 2574 if (htab->tls_ldm_got.refcount > 0) 2575 { 2576 /* Allocate 2 got entries and 1 dynamic reloc for 2577 R_SPARC_TLS_LDM_{HI22,LO10} relocs. */ 2578 htab->tls_ldm_got.offset = htab->elf.sgot->size; 2579 htab->elf.sgot->size += (2 * SPARC_ELF_WORD_BYTES (htab)); 2580 htab->elf.srelgot->size += SPARC_ELF_RELA_BYTES (htab); 2581 } 2582 else 2583 htab->tls_ldm_got.offset = -1; 2584 2585 /* Allocate global sym .plt and .got entries, and space for global 2586 sym dynamic relocs. */ 2587 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); 2588 2589 /* Allocate .plt and .got entries, and space for local symbols. */ 2590 htab_traverse (htab->loc_hash_table, allocate_local_dynrelocs, info); 2591 2592 if (! ABI_64_P (output_bfd) 2593 && !htab->is_vxworks 2594 && elf_hash_table (info)->dynamic_sections_created) 2595 { 2596 /* Make space for the trailing nop in .plt. */ 2597 if (htab->elf.splt->size > 0) 2598 htab->elf.splt->size += 1 * SPARC_INSN_BYTES; 2599 2600 /* If the .got section is more than 0x1000 bytes, we add 2601 0x1000 to the value of _GLOBAL_OFFSET_TABLE_, so that 13 2602 bit relocations have a greater chance of working. 2603 2604 FIXME: Make this optimization work for 64-bit too. */ 2605 if (htab->elf.sgot->size >= 0x1000 2606 && elf_hash_table (info)->hgot->root.u.def.value == 0) 2607 elf_hash_table (info)->hgot->root.u.def.value = 0x1000; 2608 } 2609 2610 /* The check_relocs and adjust_dynamic_symbol entry points have 2611 determined the sizes of the various dynamic sections. Allocate 2612 memory for them. */ 2613 for (s = dynobj->sections; s != NULL; s = s->next) 2614 { 2615 if ((s->flags & SEC_LINKER_CREATED) == 0) 2616 continue; 2617 2618 if (s == htab->elf.splt 2619 || s == htab->elf.sgot 2620 || s == htab->sdynbss 2621 || s == htab->elf.iplt 2622 || s == htab->elf.sgotplt) 2623 { 2624 /* Strip this section if we don't need it; see the 2625 comment below. */ 2626 } 2627 else if (CONST_STRNEQ (s->name, ".rela")) 2628 { 2629 if (s->size != 0) 2630 { 2631 /* We use the reloc_count field as a counter if we need 2632 to copy relocs into the output file. */ 2633 s->reloc_count = 0; 2634 } 2635 } 2636 else 2637 { 2638 /* It's not one of our sections. */ 2639 continue; 2640 } 2641 2642 if (s->size == 0) 2643 { 2644 /* If we don't need this section, strip it from the 2645 output file. This is mostly to handle .rela.bss and 2646 .rela.plt. We must create both sections in 2647 create_dynamic_sections, because they must be created 2648 before the linker maps input sections to output 2649 sections. The linker does that before 2650 adjust_dynamic_symbol is called, and it is that 2651 function which decides whether anything needs to go 2652 into these sections. */ 2653 s->flags |= SEC_EXCLUDE; 2654 continue; 2655 } 2656 2657 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2658 continue; 2659 2660 /* Allocate memory for the section contents. Zero the memory 2661 for the benefit of .rela.plt, which has 4 unused entries 2662 at the beginning, and we don't want garbage. */ 2663 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 2664 if (s->contents == NULL) 2665 return FALSE; 2666 } 2667 2668 if (elf_hash_table (info)->dynamic_sections_created) 2669 { 2670 /* Add some entries to the .dynamic section. We fill in the 2671 values later, in _bfd_sparc_elf_finish_dynamic_sections, but we 2672 must add the entries now so that we get the correct size for 2673 the .dynamic section. The DT_DEBUG entry is filled in by the 2674 dynamic linker and used by the debugger. */ 2675 #define add_dynamic_entry(TAG, VAL) \ 2676 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2677 2678 if (info->executable) 2679 { 2680 if (!add_dynamic_entry (DT_DEBUG, 0)) 2681 return FALSE; 2682 } 2683 2684 if (htab->elf.srelplt->size != 0) 2685 { 2686 if (!add_dynamic_entry (DT_PLTGOT, 0) 2687 || !add_dynamic_entry (DT_PLTRELSZ, 0) 2688 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 2689 || !add_dynamic_entry (DT_JMPREL, 0)) 2690 return FALSE; 2691 } 2692 2693 if (!add_dynamic_entry (DT_RELA, 0) 2694 || !add_dynamic_entry (DT_RELASZ, 0) 2695 || !add_dynamic_entry (DT_RELAENT, 2696 SPARC_ELF_RELA_BYTES (htab))) 2697 return FALSE; 2698 2699 /* If any dynamic relocs apply to a read-only section, 2700 then we need a DT_TEXTREL entry. */ 2701 if ((info->flags & DF_TEXTREL) == 0) 2702 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, 2703 (PTR) info); 2704 2705 if (info->flags & DF_TEXTREL) 2706 { 2707 if (!add_dynamic_entry (DT_TEXTREL, 0)) 2708 return FALSE; 2709 } 2710 2711 if (ABI_64_P (output_bfd)) 2712 { 2713 int reg; 2714 struct _bfd_sparc_elf_app_reg * app_regs; 2715 struct elf_strtab_hash *dynstr; 2716 struct elf_link_hash_table *eht = elf_hash_table (info); 2717 2718 /* Add dynamic STT_REGISTER symbols and corresponding DT_SPARC_REGISTER 2719 entries if needed. */ 2720 app_regs = _bfd_sparc_elf_hash_table (info)->app_regs; 2721 dynstr = eht->dynstr; 2722 2723 for (reg = 0; reg < 4; reg++) 2724 if (app_regs [reg].name != NULL) 2725 { 2726 struct elf_link_local_dynamic_entry *entry, *e; 2727 2728 if (!add_dynamic_entry (DT_SPARC_REGISTER, 0)) 2729 return FALSE; 2730 2731 entry = (struct elf_link_local_dynamic_entry *) 2732 bfd_hash_allocate (&info->hash->table, sizeof (*entry)); 2733 if (entry == NULL) 2734 return FALSE; 2735 2736 /* We cheat here a little bit: the symbol will not be local, so we 2737 put it at the end of the dynlocal linked list. We will fix it 2738 later on, as we have to fix other fields anyway. */ 2739 entry->isym.st_value = reg < 2 ? reg + 2 : reg + 4; 2740 entry->isym.st_size = 0; 2741 if (*app_regs [reg].name != '\0') 2742 entry->isym.st_name 2743 = _bfd_elf_strtab_add (dynstr, app_regs[reg].name, FALSE); 2744 else 2745 entry->isym.st_name = 0; 2746 entry->isym.st_other = 0; 2747 entry->isym.st_info = ELF_ST_INFO (app_regs [reg].bind, 2748 STT_REGISTER); 2749 entry->isym.st_shndx = app_regs [reg].shndx; 2750 entry->next = NULL; 2751 entry->input_bfd = output_bfd; 2752 entry->input_indx = -1; 2753 2754 if (eht->dynlocal == NULL) 2755 eht->dynlocal = entry; 2756 else 2757 { 2758 for (e = eht->dynlocal; e->next; e = e->next) 2759 ; 2760 e->next = entry; 2761 } 2762 eht->dynsymcount++; 2763 } 2764 } 2765 if (htab->is_vxworks 2766 && !elf_vxworks_add_dynamic_entries (output_bfd, info)) 2767 return FALSE; 2768 } 2769 #undef add_dynamic_entry 2770 2771 return TRUE; 2772 } 2773 2774 bfd_boolean 2775 _bfd_sparc_elf_new_section_hook (bfd *abfd, asection *sec) 2776 { 2777 if (!sec->used_by_bfd) 2778 { 2779 struct _bfd_sparc_elf_section_data *sdata; 2780 bfd_size_type amt = sizeof (*sdata); 2781 2782 sdata = bfd_zalloc (abfd, amt); 2783 if (sdata == NULL) 2784 return FALSE; 2785 sec->used_by_bfd = sdata; 2786 } 2787 2788 return _bfd_elf_new_section_hook (abfd, sec); 2789 } 2790 2791 bfd_boolean 2792 _bfd_sparc_elf_relax_section (bfd *abfd ATTRIBUTE_UNUSED, 2793 struct bfd_section *section, 2794 struct bfd_link_info *link_info ATTRIBUTE_UNUSED, 2795 bfd_boolean *again) 2796 { 2797 if (link_info->relocatable) 2798 (*link_info->callbacks->einfo) 2799 (_("%P%F: --relax and -r may not be used together\n")); 2800 2801 *again = FALSE; 2802 sec_do_relax (section) = 1; 2803 return TRUE; 2804 } 2805 2806 /* Return the base VMA address which should be subtracted from real addresses 2807 when resolving @dtpoff relocation. 2808 This is PT_TLS segment p_vaddr. */ 2809 2810 static bfd_vma 2811 dtpoff_base (struct bfd_link_info *info) 2812 { 2813 /* If tls_sec is NULL, we should have signalled an error already. */ 2814 if (elf_hash_table (info)->tls_sec == NULL) 2815 return 0; 2816 return elf_hash_table (info)->tls_sec->vma; 2817 } 2818 2819 /* Return the relocation value for @tpoff relocation 2820 if STT_TLS virtual address is ADDRESS. */ 2821 2822 static bfd_vma 2823 tpoff (struct bfd_link_info *info, bfd_vma address) 2824 { 2825 struct elf_link_hash_table *htab = elf_hash_table (info); 2826 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); 2827 bfd_vma static_tls_size; 2828 2829 /* If tls_sec is NULL, we should have signalled an error already. */ 2830 if (htab->tls_sec == NULL) 2831 return 0; 2832 2833 /* Consider special static TLS alignment requirements. */ 2834 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); 2835 return address - static_tls_size - htab->tls_sec->vma; 2836 } 2837 2838 /* Return the relocation value for a %gdop relocation. */ 2839 2840 static bfd_vma 2841 gdopoff (struct bfd_link_info *info, bfd_vma address) 2842 { 2843 struct elf_link_hash_table *htab = elf_hash_table (info); 2844 bfd_vma got_base; 2845 2846 got_base = (htab->hgot->root.u.def.value 2847 + htab->hgot->root.u.def.section->output_offset 2848 + htab->hgot->root.u.def.section->output_section->vma); 2849 2850 return address - got_base; 2851 } 2852 2853 /* Relocate a SPARC ELF section. */ 2854 2855 bfd_boolean 2856 _bfd_sparc_elf_relocate_section (bfd *output_bfd, 2857 struct bfd_link_info *info, 2858 bfd *input_bfd, 2859 asection *input_section, 2860 bfd_byte *contents, 2861 Elf_Internal_Rela *relocs, 2862 Elf_Internal_Sym *local_syms, 2863 asection **local_sections) 2864 { 2865 struct _bfd_sparc_elf_link_hash_table *htab; 2866 Elf_Internal_Shdr *symtab_hdr; 2867 struct elf_link_hash_entry **sym_hashes; 2868 bfd_vma *local_got_offsets; 2869 bfd_vma got_base; 2870 asection *sreloc; 2871 Elf_Internal_Rela *rel; 2872 Elf_Internal_Rela *relend; 2873 int num_relocs; 2874 bfd_boolean is_vxworks_tls; 2875 2876 htab = _bfd_sparc_elf_hash_table (info); 2877 BFD_ASSERT (htab != NULL); 2878 symtab_hdr = &elf_symtab_hdr (input_bfd); 2879 sym_hashes = elf_sym_hashes (input_bfd); 2880 local_got_offsets = elf_local_got_offsets (input_bfd); 2881 2882 if (elf_hash_table (info)->hgot == NULL) 2883 got_base = 0; 2884 else 2885 got_base = elf_hash_table (info)->hgot->root.u.def.value; 2886 2887 sreloc = elf_section_data (input_section)->sreloc; 2888 /* We have to handle relocations in vxworks .tls_vars sections 2889 specially, because the dynamic loader is 'weird'. */ 2890 is_vxworks_tls = (htab->is_vxworks && info->shared 2891 && !strcmp (input_section->output_section->name, 2892 ".tls_vars")); 2893 2894 rel = relocs; 2895 if (ABI_64_P (output_bfd)) 2896 num_relocs = NUM_SHDR_ENTRIES (_bfd_elf_single_rel_hdr (input_section)); 2897 else 2898 num_relocs = input_section->reloc_count; 2899 relend = relocs + num_relocs; 2900 for (; rel < relend; rel++) 2901 { 2902 int r_type, tls_type; 2903 reloc_howto_type *howto; 2904 unsigned long r_symndx; 2905 struct elf_link_hash_entry *h; 2906 Elf_Internal_Sym *sym; 2907 asection *sec; 2908 bfd_vma relocation, off; 2909 bfd_reloc_status_type r; 2910 bfd_boolean is_plt = FALSE; 2911 bfd_boolean unresolved_reloc; 2912 2913 r_type = SPARC_ELF_R_TYPE (rel->r_info); 2914 if (r_type == R_SPARC_GNU_VTINHERIT 2915 || r_type == R_SPARC_GNU_VTENTRY) 2916 continue; 2917 2918 if (r_type < 0 || r_type >= (int) R_SPARC_max_std) 2919 { 2920 bfd_set_error (bfd_error_bad_value); 2921 return FALSE; 2922 } 2923 howto = _bfd_sparc_elf_howto_table + r_type; 2924 2925 r_symndx = SPARC_ELF_R_SYMNDX (htab, rel->r_info); 2926 h = NULL; 2927 sym = NULL; 2928 sec = NULL; 2929 unresolved_reloc = FALSE; 2930 if (r_symndx < symtab_hdr->sh_info) 2931 { 2932 sym = local_syms + r_symndx; 2933 sec = local_sections[r_symndx]; 2934 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2935 2936 if (!info->relocatable 2937 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 2938 { 2939 /* Relocate against local STT_GNU_IFUNC symbol. */ 2940 h = elf_sparc_get_local_sym_hash (htab, input_bfd, 2941 rel, FALSE); 2942 if (h == NULL) 2943 abort (); 2944 2945 /* Set STT_GNU_IFUNC symbol value. */ 2946 h->root.u.def.value = sym->st_value; 2947 h->root.u.def.section = sec; 2948 } 2949 } 2950 else 2951 { 2952 bfd_boolean warned; 2953 2954 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 2955 r_symndx, symtab_hdr, sym_hashes, 2956 h, sec, relocation, 2957 unresolved_reloc, warned); 2958 if (warned) 2959 { 2960 /* To avoid generating warning messages about truncated 2961 relocations, set the relocation's address to be the same as 2962 the start of this section. */ 2963 if (input_section->output_section != NULL) 2964 relocation = input_section->output_section->vma; 2965 else 2966 relocation = 0; 2967 } 2968 } 2969 2970 if (sec != NULL && elf_discarded_section (sec)) 2971 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2972 rel, relend, howto, contents); 2973 2974 if (info->relocatable) 2975 continue; 2976 2977 if (h != NULL 2978 && h->type == STT_GNU_IFUNC 2979 && h->def_regular) 2980 { 2981 asection *plt_sec; 2982 const char *name; 2983 2984 if ((input_section->flags & SEC_ALLOC) == 0 2985 || h->plt.offset == (bfd_vma) -1) 2986 abort (); 2987 2988 plt_sec = htab->elf.splt; 2989 if (! plt_sec) 2990 plt_sec =htab->elf.iplt; 2991 2992 switch (r_type) 2993 { 2994 case R_SPARC_GOTDATA_OP: 2995 continue; 2996 2997 case R_SPARC_GOTDATA_OP_HIX22: 2998 case R_SPARC_GOTDATA_OP_LOX10: 2999 r_type = (r_type == R_SPARC_GOTDATA_OP_HIX22 3000 ? R_SPARC_GOT22 3001 : R_SPARC_GOT10); 3002 howto = _bfd_sparc_elf_howto_table + r_type; 3003 /* Fall through. */ 3004 3005 case R_SPARC_GOT10: 3006 case R_SPARC_GOT13: 3007 case R_SPARC_GOT22: 3008 if (htab->elf.sgot == NULL) 3009 abort (); 3010 off = h->got.offset; 3011 if (off == (bfd_vma) -1) 3012 abort(); 3013 relocation = htab->elf.sgot->output_offset + off - got_base; 3014 goto do_relocation; 3015 3016 case R_SPARC_WPLT30: 3017 case R_SPARC_WDISP30: 3018 relocation = (plt_sec->output_section->vma 3019 + plt_sec->output_offset + h->plt.offset); 3020 goto do_relocation; 3021 3022 case R_SPARC_32: 3023 case R_SPARC_64: 3024 if (info->shared && h->non_got_ref) 3025 { 3026 Elf_Internal_Rela outrel; 3027 bfd_vma offset; 3028 3029 offset = _bfd_elf_section_offset (output_bfd, info, 3030 input_section, 3031 rel->r_offset); 3032 if (offset == (bfd_vma) -1 3033 || offset == (bfd_vma) -2) 3034 abort(); 3035 3036 outrel.r_offset = (input_section->output_section->vma 3037 + input_section->output_offset 3038 + offset); 3039 3040 if (h->dynindx == -1 3041 || h->forced_local 3042 || info->executable) 3043 { 3044 outrel.r_info = SPARC_ELF_R_INFO (htab, NULL, 3045 0, R_SPARC_IRELATIVE); 3046 outrel.r_addend = relocation + rel->r_addend; 3047 } 3048 else 3049 { 3050 if (h->dynindx == -1) 3051 abort(); 3052 outrel.r_info = SPARC_ELF_R_INFO (htab, rel, h->dynindx, r_type); 3053 outrel.r_addend = rel->r_addend; 3054 } 3055 3056 sparc_elf_append_rela (output_bfd, sreloc, &outrel); 3057 continue; 3058 } 3059 3060 relocation = (plt_sec->output_section->vma 3061 + plt_sec->output_offset + h->plt.offset); 3062 goto do_relocation; 3063 3064 case R_SPARC_HI22: 3065 case R_SPARC_LO10: 3066 /* We should only see such relocs in static links. */ 3067 if (info->shared) 3068 abort(); 3069 relocation = (plt_sec->output_section->vma 3070 + plt_sec->output_offset + h->plt.offset); 3071 goto do_relocation; 3072 3073 default: 3074 if (h->root.root.string) 3075 name = h->root.root.string; 3076 else 3077 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, 3078 NULL); 3079 (*_bfd_error_handler) 3080 (_("%B: relocation %s against STT_GNU_IFUNC " 3081 "symbol `%s' isn't handled by %s"), input_bfd, 3082 _bfd_sparc_elf_howto_table[r_type].name, 3083 name, __FUNCTION__); 3084 bfd_set_error (bfd_error_bad_value); 3085 return FALSE; 3086 } 3087 } 3088 3089 switch (r_type) 3090 { 3091 case R_SPARC_GOTDATA_OP_HIX22: 3092 case R_SPARC_GOTDATA_OP_LOX10: 3093 if (SYMBOL_REFERENCES_LOCAL (info, h)) 3094 r_type = (r_type == R_SPARC_GOTDATA_OP_HIX22 3095 ? R_SPARC_GOTDATA_HIX22 3096 : R_SPARC_GOTDATA_LOX10); 3097 else 3098 r_type = (r_type == R_SPARC_GOTDATA_OP_HIX22 3099 ? R_SPARC_GOT22 3100 : R_SPARC_GOT10); 3101 howto = _bfd_sparc_elf_howto_table + r_type; 3102 break; 3103 3104 case R_SPARC_GOTDATA_OP: 3105 if (SYMBOL_REFERENCES_LOCAL (info, h)) 3106 { 3107 bfd_vma insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 3108 3109 /* {ld,ldx} [%rs1 + %rs2], %rd --> add %rs1, %rs2, %rd */ 3110 relocation = 0x80000000 | (insn & 0x3e07c01f); 3111 bfd_put_32 (output_bfd, relocation, contents + rel->r_offset); 3112 } 3113 continue; 3114 } 3115 3116 switch (r_type) 3117 { 3118 case R_SPARC_GOTDATA_HIX22: 3119 case R_SPARC_GOTDATA_LOX10: 3120 relocation = gdopoff (info, relocation); 3121 break; 3122 3123 case R_SPARC_GOT10: 3124 case R_SPARC_GOT13: 3125 case R_SPARC_GOT22: 3126 /* Relocation is to the entry for this symbol in the global 3127 offset table. */ 3128 if (htab->elf.sgot == NULL) 3129 abort (); 3130 3131 if (h != NULL) 3132 { 3133 bfd_boolean dyn; 3134 3135 off = h->got.offset; 3136 BFD_ASSERT (off != (bfd_vma) -1); 3137 dyn = elf_hash_table (info)->dynamic_sections_created; 3138 3139 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 3140 || (info->shared 3141 && SYMBOL_REFERENCES_LOCAL (info, h))) 3142 { 3143 /* This is actually a static link, or it is a 3144 -Bsymbolic link and the symbol is defined 3145 locally, or the symbol was forced to be local 3146 because of a version file. We must initialize 3147 this entry in the global offset table. Since the 3148 offset must always be a multiple of 8 for 64-bit 3149 and 4 for 32-bit, we use the least significant bit 3150 to record whether we have initialized it already. 3151 3152 When doing a dynamic link, we create a .rela.got 3153 relocation entry to initialize the value. This 3154 is done in the finish_dynamic_symbol routine. */ 3155 if ((off & 1) != 0) 3156 off &= ~1; 3157 else 3158 { 3159 SPARC_ELF_PUT_WORD (htab, output_bfd, relocation, 3160 htab->elf.sgot->contents + off); 3161 h->got.offset |= 1; 3162 } 3163 } 3164 else 3165 unresolved_reloc = FALSE; 3166 } 3167 else 3168 { 3169 BFD_ASSERT (local_got_offsets != NULL 3170 && local_got_offsets[r_symndx] != (bfd_vma) -1); 3171 3172 off = local_got_offsets[r_symndx]; 3173 3174 /* The offset must always be a multiple of 8 on 64-bit and 3175 4 on 32-bit. We use the least significant bit to record 3176 whether we have already processed this entry. */ 3177 if ((off & 1) != 0) 3178 off &= ~1; 3179 else 3180 { 3181 3182 if (info->shared) 3183 { 3184 asection *s; 3185 Elf_Internal_Rela outrel; 3186 3187 /* We need to generate a R_SPARC_RELATIVE reloc 3188 for the dynamic linker. */ 3189 s = htab->elf.srelgot; 3190 BFD_ASSERT (s != NULL); 3191 3192 outrel.r_offset = (htab->elf.sgot->output_section->vma 3193 + htab->elf.sgot->output_offset 3194 + off); 3195 outrel.r_info = SPARC_ELF_R_INFO (htab, NULL, 3196 0, R_SPARC_RELATIVE); 3197 outrel.r_addend = relocation; 3198 relocation = 0; 3199 sparc_elf_append_rela (output_bfd, s, &outrel); 3200 } 3201 3202 SPARC_ELF_PUT_WORD (htab, output_bfd, relocation, 3203 htab->elf.sgot->contents + off); 3204 local_got_offsets[r_symndx] |= 1; 3205 } 3206 } 3207 relocation = htab->elf.sgot->output_offset + off - got_base; 3208 break; 3209 3210 case R_SPARC_PLT32: 3211 case R_SPARC_PLT64: 3212 if (h == NULL || h->plt.offset == (bfd_vma) -1) 3213 { 3214 r_type = (r_type == R_SPARC_PLT32) ? R_SPARC_32 : R_SPARC_64; 3215 goto r_sparc_plt32; 3216 } 3217 /* Fall through. */ 3218 3219 case R_SPARC_WPLT30: 3220 case R_SPARC_HIPLT22: 3221 case R_SPARC_LOPLT10: 3222 case R_SPARC_PCPLT32: 3223 case R_SPARC_PCPLT22: 3224 case R_SPARC_PCPLT10: 3225 r_sparc_wplt30: 3226 /* Relocation is to the entry for this symbol in the 3227 procedure linkage table. */ 3228 3229 if (! ABI_64_P (output_bfd)) 3230 { 3231 /* The Solaris native assembler will generate a WPLT30 reloc 3232 for a local symbol if you assemble a call from one 3233 section to another when using -K pic. We treat it as 3234 WDISP30. */ 3235 if (h == NULL) 3236 break; 3237 } 3238 /* PR 7027: We need similar behaviour for 64-bit binaries. */ 3239 else if (r_type == R_SPARC_WPLT30 && h == NULL) 3240 break; 3241 else 3242 { 3243 BFD_ASSERT (h != NULL); 3244 } 3245 3246 if (h->plt.offset == (bfd_vma) -1 || htab->elf.splt == NULL) 3247 { 3248 /* We didn't make a PLT entry for this symbol. This 3249 happens when statically linking PIC code, or when 3250 using -Bsymbolic. */ 3251 break; 3252 } 3253 3254 relocation = (htab->elf.splt->output_section->vma 3255 + htab->elf.splt->output_offset 3256 + h->plt.offset); 3257 unresolved_reloc = FALSE; 3258 if (r_type == R_SPARC_PLT32 || r_type == R_SPARC_PLT64) 3259 { 3260 r_type = r_type == R_SPARC_PLT32 ? R_SPARC_32 : R_SPARC_64; 3261 is_plt = TRUE; 3262 goto r_sparc_plt32; 3263 } 3264 break; 3265 3266 case R_SPARC_PC10: 3267 case R_SPARC_PC22: 3268 case R_SPARC_PC_HH22: 3269 case R_SPARC_PC_HM10: 3270 case R_SPARC_PC_LM22: 3271 if (h != NULL 3272 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 3273 break; 3274 /* Fall through. */ 3275 case R_SPARC_DISP8: 3276 case R_SPARC_DISP16: 3277 case R_SPARC_DISP32: 3278 case R_SPARC_DISP64: 3279 case R_SPARC_WDISP30: 3280 case R_SPARC_WDISP22: 3281 case R_SPARC_WDISP19: 3282 case R_SPARC_WDISP16: 3283 case R_SPARC_8: 3284 case R_SPARC_16: 3285 case R_SPARC_32: 3286 case R_SPARC_HI22: 3287 case R_SPARC_22: 3288 case R_SPARC_13: 3289 case R_SPARC_LO10: 3290 case R_SPARC_UA16: 3291 case R_SPARC_UA32: 3292 case R_SPARC_10: 3293 case R_SPARC_11: 3294 case R_SPARC_64: 3295 case R_SPARC_OLO10: 3296 case R_SPARC_HH22: 3297 case R_SPARC_HM10: 3298 case R_SPARC_LM22: 3299 case R_SPARC_7: 3300 case R_SPARC_5: 3301 case R_SPARC_6: 3302 case R_SPARC_HIX22: 3303 case R_SPARC_LOX10: 3304 case R_SPARC_H44: 3305 case R_SPARC_M44: 3306 case R_SPARC_L44: 3307 case R_SPARC_UA64: 3308 r_sparc_plt32: 3309 if ((input_section->flags & SEC_ALLOC) == 0 3310 || is_vxworks_tls) 3311 break; 3312 3313 if ((info->shared 3314 && (h == NULL 3315 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 3316 || h->root.type != bfd_link_hash_undefweak) 3317 && (! howto->pc_relative 3318 || !SYMBOL_CALLS_LOCAL (info, h))) 3319 || (!info->shared 3320 && h != NULL 3321 && h->dynindx != -1 3322 && !h->non_got_ref 3323 && ((h->def_dynamic 3324 && !h->def_regular) 3325 || h->root.type == bfd_link_hash_undefweak 3326 || h->root.type == bfd_link_hash_undefined))) 3327 { 3328 Elf_Internal_Rela outrel; 3329 bfd_boolean skip, relocate = FALSE; 3330 3331 /* When generating a shared object, these relocations 3332 are copied into the output file to be resolved at run 3333 time. */ 3334 3335 BFD_ASSERT (sreloc != NULL); 3336 3337 skip = FALSE; 3338 3339 outrel.r_offset = 3340 _bfd_elf_section_offset (output_bfd, info, input_section, 3341 rel->r_offset); 3342 if (outrel.r_offset == (bfd_vma) -1) 3343 skip = TRUE; 3344 else if (outrel.r_offset == (bfd_vma) -2) 3345 skip = TRUE, relocate = TRUE; 3346 outrel.r_offset += (input_section->output_section->vma 3347 + input_section->output_offset); 3348 3349 /* Optimize unaligned reloc usage now that we know where 3350 it finally resides. */ 3351 switch (r_type) 3352 { 3353 case R_SPARC_16: 3354 if (outrel.r_offset & 1) 3355 r_type = R_SPARC_UA16; 3356 break; 3357 case R_SPARC_UA16: 3358 if (!(outrel.r_offset & 1)) 3359 r_type = R_SPARC_16; 3360 break; 3361 case R_SPARC_32: 3362 if (outrel.r_offset & 3) 3363 r_type = R_SPARC_UA32; 3364 break; 3365 case R_SPARC_UA32: 3366 if (!(outrel.r_offset & 3)) 3367 r_type = R_SPARC_32; 3368 break; 3369 case R_SPARC_64: 3370 if (outrel.r_offset & 7) 3371 r_type = R_SPARC_UA64; 3372 break; 3373 case R_SPARC_UA64: 3374 if (!(outrel.r_offset & 7)) 3375 r_type = R_SPARC_64; 3376 break; 3377 case R_SPARC_DISP8: 3378 case R_SPARC_DISP16: 3379 case R_SPARC_DISP32: 3380 case R_SPARC_DISP64: 3381 /* If the symbol is not dynamic, we should not keep 3382 a dynamic relocation. But an .rela.* slot has been 3383 allocated for it, output R_SPARC_NONE. 3384 FIXME: Add code tracking needed dynamic relocs as 3385 e.g. i386 has. */ 3386 if (h->dynindx == -1) 3387 skip = TRUE, relocate = TRUE; 3388 break; 3389 } 3390 3391 if (skip) 3392 memset (&outrel, 0, sizeof outrel); 3393 /* h->dynindx may be -1 if the symbol was marked to 3394 become local. */ 3395 else if (h != NULL && h->dynindx != -1 && ! is_plt 3396 && (!info->shared 3397 || !SYMBOLIC_BIND (info, h) 3398 || !h->def_regular)) 3399 { 3400 BFD_ASSERT (h->dynindx != -1); 3401 outrel.r_info = SPARC_ELF_R_INFO (htab, rel, h->dynindx, r_type); 3402 outrel.r_addend = rel->r_addend; 3403 } 3404 else 3405 { 3406 if (r_type == R_SPARC_32 || r_type == R_SPARC_64) 3407 { 3408 outrel.r_info = SPARC_ELF_R_INFO (htab, NULL, 3409 0, R_SPARC_RELATIVE); 3410 outrel.r_addend = relocation + rel->r_addend; 3411 } 3412 else 3413 { 3414 long indx; 3415 3416 outrel.r_addend = relocation + rel->r_addend; 3417 3418 if (is_plt) 3419 sec = htab->elf.splt; 3420 3421 if (bfd_is_abs_section (sec)) 3422 indx = 0; 3423 else if (sec == NULL || sec->owner == NULL) 3424 { 3425 bfd_set_error (bfd_error_bad_value); 3426 return FALSE; 3427 } 3428 else 3429 { 3430 asection *osec; 3431 3432 /* We are turning this relocation into one 3433 against a section symbol. It would be 3434 proper to subtract the symbol's value, 3435 osec->vma, from the emitted reloc addend, 3436 but ld.so expects buggy relocs. */ 3437 osec = sec->output_section; 3438 indx = elf_section_data (osec)->dynindx; 3439 3440 if (indx == 0) 3441 { 3442 osec = htab->elf.text_index_section; 3443 indx = elf_section_data (osec)->dynindx; 3444 } 3445 3446 /* FIXME: we really should be able to link non-pic 3447 shared libraries. */ 3448 if (indx == 0) 3449 { 3450 BFD_FAIL (); 3451 (*_bfd_error_handler) 3452 (_("%B: probably compiled without -fPIC?"), 3453 input_bfd); 3454 bfd_set_error (bfd_error_bad_value); 3455 return FALSE; 3456 } 3457 } 3458 3459 outrel.r_info = SPARC_ELF_R_INFO (htab, rel, indx, 3460 r_type); 3461 } 3462 } 3463 3464 sparc_elf_append_rela (output_bfd, sreloc, &outrel); 3465 3466 /* This reloc will be computed at runtime, so there's no 3467 need to do anything now. */ 3468 if (! relocate) 3469 continue; 3470 } 3471 break; 3472 3473 case R_SPARC_TLS_GD_HI22: 3474 if (! ABI_64_P (input_bfd) 3475 && ! _bfd_sparc_elf_tdata (input_bfd)->has_tlsgd) 3476 { 3477 /* R_SPARC_REV32 used the same reloc number as 3478 R_SPARC_TLS_GD_HI22. */ 3479 r_type = R_SPARC_REV32; 3480 break; 3481 } 3482 /* Fall through */ 3483 3484 case R_SPARC_TLS_GD_LO10: 3485 case R_SPARC_TLS_IE_HI22: 3486 case R_SPARC_TLS_IE_LO10: 3487 r_type = sparc_elf_tls_transition (info, input_bfd, r_type, h == NULL); 3488 tls_type = GOT_UNKNOWN; 3489 if (h == NULL && local_got_offsets) 3490 tls_type = _bfd_sparc_elf_local_got_tls_type (input_bfd) [r_symndx]; 3491 else if (h != NULL) 3492 { 3493 tls_type = _bfd_sparc_elf_hash_entry(h)->tls_type; 3494 if (!info->shared && h->dynindx == -1 && tls_type == GOT_TLS_IE) 3495 switch (SPARC_ELF_R_TYPE (rel->r_info)) 3496 { 3497 case R_SPARC_TLS_GD_HI22: 3498 case R_SPARC_TLS_IE_HI22: 3499 r_type = R_SPARC_TLS_LE_HIX22; 3500 break; 3501 default: 3502 r_type = R_SPARC_TLS_LE_LOX10; 3503 break; 3504 } 3505 } 3506 if (tls_type == GOT_TLS_IE) 3507 switch (r_type) 3508 { 3509 case R_SPARC_TLS_GD_HI22: 3510 r_type = R_SPARC_TLS_IE_HI22; 3511 break; 3512 case R_SPARC_TLS_GD_LO10: 3513 r_type = R_SPARC_TLS_IE_LO10; 3514 break; 3515 } 3516 3517 if (r_type == R_SPARC_TLS_LE_HIX22) 3518 { 3519 relocation = tpoff (info, relocation); 3520 break; 3521 } 3522 if (r_type == R_SPARC_TLS_LE_LOX10) 3523 { 3524 /* Change add into xor. */ 3525 relocation = tpoff (info, relocation); 3526 bfd_put_32 (output_bfd, (bfd_get_32 (input_bfd, 3527 contents + rel->r_offset) 3528 | 0x80182000), contents + rel->r_offset); 3529 break; 3530 } 3531 3532 if (h != NULL) 3533 { 3534 off = h->got.offset; 3535 h->got.offset |= 1; 3536 } 3537 else 3538 { 3539 BFD_ASSERT (local_got_offsets != NULL); 3540 off = local_got_offsets[r_symndx]; 3541 local_got_offsets[r_symndx] |= 1; 3542 } 3543 3544 r_sparc_tlsldm: 3545 if (htab->elf.sgot == NULL) 3546 abort (); 3547 3548 if ((off & 1) != 0) 3549 off &= ~1; 3550 else 3551 { 3552 Elf_Internal_Rela outrel; 3553 int dr_type, indx; 3554 3555 if (htab->elf.srelgot == NULL) 3556 abort (); 3557 3558 SPARC_ELF_PUT_WORD (htab, output_bfd, 0, 3559 htab->elf.sgot->contents + off); 3560 outrel.r_offset = (htab->elf.sgot->output_section->vma 3561 + htab->elf.sgot->output_offset + off); 3562 indx = h && h->dynindx != -1 ? h->dynindx : 0; 3563 if (r_type == R_SPARC_TLS_IE_HI22 3564 || r_type == R_SPARC_TLS_IE_LO10) 3565 dr_type = SPARC_ELF_TPOFF_RELOC (htab); 3566 else 3567 dr_type = SPARC_ELF_DTPMOD_RELOC (htab); 3568 if (dr_type == SPARC_ELF_TPOFF_RELOC (htab) && indx == 0) 3569 outrel.r_addend = relocation - dtpoff_base (info); 3570 else 3571 outrel.r_addend = 0; 3572 outrel.r_info = SPARC_ELF_R_INFO (htab, NULL, indx, dr_type); 3573 sparc_elf_append_rela (output_bfd, htab->elf.srelgot, &outrel); 3574 3575 if (r_type == R_SPARC_TLS_GD_HI22 3576 || r_type == R_SPARC_TLS_GD_LO10) 3577 { 3578 if (indx == 0) 3579 { 3580 BFD_ASSERT (! unresolved_reloc); 3581 SPARC_ELF_PUT_WORD (htab, output_bfd, 3582 relocation - dtpoff_base (info), 3583 (htab->elf.sgot->contents + off 3584 + SPARC_ELF_WORD_BYTES (htab))); 3585 } 3586 else 3587 { 3588 SPARC_ELF_PUT_WORD (htab, output_bfd, 0, 3589 (htab->elf.sgot->contents + off 3590 + SPARC_ELF_WORD_BYTES (htab))); 3591 outrel.r_info = SPARC_ELF_R_INFO (htab, NULL, indx, 3592 SPARC_ELF_DTPOFF_RELOC (htab)); 3593 outrel.r_offset += SPARC_ELF_WORD_BYTES (htab); 3594 sparc_elf_append_rela (output_bfd, htab->elf.srelgot, 3595 &outrel); 3596 } 3597 } 3598 else if (dr_type == SPARC_ELF_DTPMOD_RELOC (htab)) 3599 { 3600 SPARC_ELF_PUT_WORD (htab, output_bfd, 0, 3601 (htab->elf.sgot->contents + off 3602 + SPARC_ELF_WORD_BYTES (htab))); 3603 } 3604 } 3605 3606 if (off >= (bfd_vma) -2) 3607 abort (); 3608 3609 relocation = htab->elf.sgot->output_offset + off - got_base; 3610 unresolved_reloc = FALSE; 3611 howto = _bfd_sparc_elf_howto_table + r_type; 3612 break; 3613 3614 case R_SPARC_TLS_LDM_HI22: 3615 case R_SPARC_TLS_LDM_LO10: 3616 if (! info->shared) 3617 { 3618 bfd_put_32 (output_bfd, SPARC_NOP, contents + rel->r_offset); 3619 continue; 3620 } 3621 off = htab->tls_ldm_got.offset; 3622 htab->tls_ldm_got.offset |= 1; 3623 goto r_sparc_tlsldm; 3624 3625 case R_SPARC_TLS_LDO_HIX22: 3626 case R_SPARC_TLS_LDO_LOX10: 3627 if (info->shared) 3628 { 3629 relocation -= dtpoff_base (info); 3630 break; 3631 } 3632 3633 r_type = (r_type == R_SPARC_TLS_LDO_HIX22 3634 ? R_SPARC_TLS_LE_HIX22 : R_SPARC_TLS_LE_LOX10); 3635 /* Fall through. */ 3636 3637 case R_SPARC_TLS_LE_HIX22: 3638 case R_SPARC_TLS_LE_LOX10: 3639 if (info->shared) 3640 { 3641 Elf_Internal_Rela outrel; 3642 bfd_boolean skip; 3643 3644 BFD_ASSERT (sreloc != NULL); 3645 skip = FALSE; 3646 outrel.r_offset = 3647 _bfd_elf_section_offset (output_bfd, info, input_section, 3648 rel->r_offset); 3649 if (outrel.r_offset == (bfd_vma) -1) 3650 skip = TRUE; 3651 else if (outrel.r_offset == (bfd_vma) -2) 3652 skip = TRUE; 3653 outrel.r_offset += (input_section->output_section->vma 3654 + input_section->output_offset); 3655 if (skip) 3656 memset (&outrel, 0, sizeof outrel); 3657 else 3658 { 3659 outrel.r_info = SPARC_ELF_R_INFO (htab, NULL, 0, r_type); 3660 outrel.r_addend = relocation - dtpoff_base (info) 3661 + rel->r_addend; 3662 } 3663 3664 sparc_elf_append_rela (output_bfd, sreloc, &outrel); 3665 continue; 3666 } 3667 relocation = tpoff (info, relocation); 3668 break; 3669 3670 case R_SPARC_TLS_LDM_CALL: 3671 if (! info->shared) 3672 { 3673 /* mov %g0, %o0 */ 3674 bfd_put_32 (output_bfd, 0x90100000, contents + rel->r_offset); 3675 continue; 3676 } 3677 /* Fall through */ 3678 3679 case R_SPARC_TLS_GD_CALL: 3680 tls_type = GOT_UNKNOWN; 3681 if (h == NULL && local_got_offsets) 3682 tls_type = _bfd_sparc_elf_local_got_tls_type (input_bfd) [r_symndx]; 3683 else if (h != NULL) 3684 tls_type = _bfd_sparc_elf_hash_entry(h)->tls_type; 3685 if (! info->shared 3686 || (r_type == R_SPARC_TLS_GD_CALL && tls_type == GOT_TLS_IE)) 3687 { 3688 bfd_vma insn; 3689 3690 if (!info->shared && (h == NULL || h->dynindx == -1)) 3691 { 3692 /* GD -> LE */ 3693 bfd_put_32 (output_bfd, SPARC_NOP, contents + rel->r_offset); 3694 continue; 3695 } 3696 3697 /* GD -> IE */ 3698 if (rel + 1 < relend 3699 && SPARC_ELF_R_TYPE (rel[1].r_info) == R_SPARC_TLS_GD_ADD 3700 && rel[1].r_offset == rel->r_offset + 4 3701 && SPARC_ELF_R_SYMNDX (htab, rel[1].r_info) == r_symndx 3702 && (((insn = bfd_get_32 (input_bfd, 3703 contents + rel[1].r_offset)) 3704 >> 25) & 0x1f) == 8) 3705 { 3706 /* We have 3707 call __tls_get_addr, %tgd_call(foo) 3708 add %reg1, %reg2, %o0, %tgd_add(foo) 3709 and change it into IE: 3710 {ld,ldx} [%reg1 + %reg2], %o0, %tie_ldx(foo) 3711 add %g7, %o0, %o0, %tie_add(foo). 3712 add is 0x80000000 | (rd << 25) | (rs1 << 14) | rs2, 3713 ld is 0xc0000000 | (rd << 25) | (rs1 << 14) | rs2, 3714 ldx is 0xc0580000 | (rd << 25) | (rs1 << 14) | rs2. */ 3715 bfd_put_32 (output_bfd, insn | (ABI_64_P (output_bfd) ? 0xc0580000 : 0xc0000000), 3716 contents + rel->r_offset); 3717 bfd_put_32 (output_bfd, 0x9001c008, 3718 contents + rel->r_offset + 4); 3719 rel++; 3720 continue; 3721 } 3722 3723 bfd_put_32 (output_bfd, 0x9001c008, contents + rel->r_offset); 3724 continue; 3725 } 3726 3727 h = (struct elf_link_hash_entry *) 3728 bfd_link_hash_lookup (info->hash, "__tls_get_addr", FALSE, 3729 FALSE, TRUE); 3730 BFD_ASSERT (h != NULL); 3731 r_type = R_SPARC_WPLT30; 3732 howto = _bfd_sparc_elf_howto_table + r_type; 3733 goto r_sparc_wplt30; 3734 3735 case R_SPARC_TLS_GD_ADD: 3736 tls_type = GOT_UNKNOWN; 3737 if (h == NULL && local_got_offsets) 3738 tls_type = _bfd_sparc_elf_local_got_tls_type (input_bfd) [r_symndx]; 3739 else if (h != NULL) 3740 tls_type = _bfd_sparc_elf_hash_entry(h)->tls_type; 3741 if (! info->shared || tls_type == GOT_TLS_IE) 3742 { 3743 /* add %reg1, %reg2, %reg3, %tgd_add(foo) 3744 changed into IE: 3745 {ld,ldx} [%reg1 + %reg2], %reg3, %tie_ldx(foo) 3746 or LE: 3747 add %g7, %reg2, %reg3. */ 3748 bfd_vma insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 3749 if ((h != NULL && h->dynindx != -1) || info->shared) 3750 relocation = insn | (ABI_64_P (output_bfd) ? 0xc0580000 : 0xc0000000); 3751 else 3752 relocation = (insn & ~0x7c000) | 0x1c000; 3753 bfd_put_32 (output_bfd, relocation, contents + rel->r_offset); 3754 } 3755 continue; 3756 3757 case R_SPARC_TLS_LDM_ADD: 3758 if (! info->shared) 3759 bfd_put_32 (output_bfd, SPARC_NOP, contents + rel->r_offset); 3760 continue; 3761 3762 case R_SPARC_TLS_LDO_ADD: 3763 if (! info->shared) 3764 { 3765 /* Change rs1 into %g7. */ 3766 bfd_vma insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 3767 insn = (insn & ~0x7c000) | 0x1c000; 3768 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 3769 } 3770 continue; 3771 3772 case R_SPARC_TLS_IE_LD: 3773 case R_SPARC_TLS_IE_LDX: 3774 if (! info->shared && (h == NULL || h->dynindx == -1)) 3775 { 3776 bfd_vma insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 3777 int rs2 = insn & 0x1f; 3778 int rd = (insn >> 25) & 0x1f; 3779 3780 if (rs2 == rd) 3781 relocation = SPARC_NOP; 3782 else 3783 relocation = 0x80100000 | (insn & 0x3e00001f); 3784 bfd_put_32 (output_bfd, relocation, contents + rel->r_offset); 3785 } 3786 continue; 3787 3788 case R_SPARC_TLS_IE_ADD: 3789 /* Totally useless relocation. */ 3790 continue; 3791 3792 case R_SPARC_TLS_DTPOFF32: 3793 case R_SPARC_TLS_DTPOFF64: 3794 relocation -= dtpoff_base (info); 3795 break; 3796 3797 default: 3798 break; 3799 } 3800 3801 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections 3802 because such sections are not SEC_ALLOC and thus ld.so will 3803 not process them. */ 3804 if (unresolved_reloc 3805 && !((input_section->flags & SEC_DEBUGGING) != 0 3806 && h->def_dynamic)) 3807 (*_bfd_error_handler) 3808 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), 3809 input_bfd, 3810 input_section, 3811 (long) rel->r_offset, 3812 howto->name, 3813 h->root.root.string); 3814 3815 r = bfd_reloc_continue; 3816 if (r_type == R_SPARC_OLO10) 3817 { 3818 bfd_vma x; 3819 3820 if (! ABI_64_P (output_bfd)) 3821 abort (); 3822 3823 relocation += rel->r_addend; 3824 relocation = (relocation & 0x3ff) + ELF64_R_TYPE_DATA (rel->r_info); 3825 3826 x = bfd_get_32 (input_bfd, contents + rel->r_offset); 3827 x = (x & ~(bfd_vma) 0x1fff) | (relocation & 0x1fff); 3828 bfd_put_32 (input_bfd, x, contents + rel->r_offset); 3829 3830 r = bfd_check_overflow (howto->complain_on_overflow, 3831 howto->bitsize, howto->rightshift, 3832 bfd_arch_bits_per_address (input_bfd), 3833 relocation); 3834 } 3835 else if (r_type == R_SPARC_WDISP16) 3836 { 3837 bfd_vma x; 3838 3839 relocation += rel->r_addend; 3840 relocation -= (input_section->output_section->vma 3841 + input_section->output_offset); 3842 relocation -= rel->r_offset; 3843 3844 x = bfd_get_32 (input_bfd, contents + rel->r_offset); 3845 x |= ((((relocation >> 2) & 0xc000) << 6) 3846 | ((relocation >> 2) & 0x3fff)); 3847 bfd_put_32 (input_bfd, x, contents + rel->r_offset); 3848 3849 r = bfd_check_overflow (howto->complain_on_overflow, 3850 howto->bitsize, howto->rightshift, 3851 bfd_arch_bits_per_address (input_bfd), 3852 relocation); 3853 } 3854 else if (r_type == R_SPARC_REV32) 3855 { 3856 bfd_vma x; 3857 3858 relocation = relocation + rel->r_addend; 3859 3860 x = bfd_get_32 (input_bfd, contents + rel->r_offset); 3861 x = x + relocation; 3862 bfd_putl32 (/*input_bfd,*/ x, contents + rel->r_offset); 3863 r = bfd_reloc_ok; 3864 } 3865 else if (r_type == R_SPARC_TLS_LDO_HIX22 3866 || r_type == R_SPARC_TLS_LE_HIX22) 3867 { 3868 bfd_vma x; 3869 3870 relocation += rel->r_addend; 3871 if (r_type == R_SPARC_TLS_LE_HIX22) 3872 relocation ^= MINUS_ONE; 3873 3874 x = bfd_get_32 (input_bfd, contents + rel->r_offset); 3875 x = (x & ~(bfd_vma) 0x3fffff) | ((relocation >> 10) & 0x3fffff); 3876 bfd_put_32 (input_bfd, x, contents + rel->r_offset); 3877 r = bfd_reloc_ok; 3878 } 3879 else if (r_type == R_SPARC_TLS_LDO_LOX10 3880 || r_type == R_SPARC_TLS_LE_LOX10) 3881 { 3882 bfd_vma x; 3883 3884 relocation += rel->r_addend; 3885 relocation &= 0x3ff; 3886 if (r_type == R_SPARC_TLS_LE_LOX10) 3887 relocation |= 0x1c00; 3888 3889 x = bfd_get_32 (input_bfd, contents + rel->r_offset); 3890 x = (x & ~(bfd_vma) 0x1fff) | relocation; 3891 bfd_put_32 (input_bfd, x, contents + rel->r_offset); 3892 3893 r = bfd_reloc_ok; 3894 } 3895 else if (r_type == R_SPARC_HIX22 3896 || r_type == R_SPARC_GOTDATA_HIX22) 3897 { 3898 bfd_vma x; 3899 3900 relocation += rel->r_addend; 3901 if (r_type == R_SPARC_HIX22 3902 || (bfd_signed_vma) relocation < 0) 3903 relocation = relocation ^ MINUS_ONE; 3904 3905 x = bfd_get_32 (input_bfd, contents + rel->r_offset); 3906 x = (x & ~(bfd_vma) 0x3fffff) | ((relocation >> 10) & 0x3fffff); 3907 bfd_put_32 (input_bfd, x, contents + rel->r_offset); 3908 3909 r = bfd_check_overflow (howto->complain_on_overflow, 3910 howto->bitsize, howto->rightshift, 3911 bfd_arch_bits_per_address (input_bfd), 3912 relocation); 3913 } 3914 else if (r_type == R_SPARC_LOX10 3915 || r_type == R_SPARC_GOTDATA_LOX10) 3916 { 3917 bfd_vma x; 3918 3919 relocation += rel->r_addend; 3920 if (r_type == R_SPARC_LOX10 3921 || (bfd_signed_vma) relocation < 0) 3922 relocation = (relocation & 0x3ff) | 0x1c00; 3923 else 3924 relocation = (relocation & 0x3ff); 3925 3926 x = bfd_get_32 (input_bfd, contents + rel->r_offset); 3927 x = (x & ~(bfd_vma) 0x1fff) | relocation; 3928 bfd_put_32 (input_bfd, x, contents + rel->r_offset); 3929 3930 r = bfd_reloc_ok; 3931 } 3932 else if ((r_type == R_SPARC_WDISP30 || r_type == R_SPARC_WPLT30) 3933 && sec_do_relax (input_section) 3934 && rel->r_offset + 4 < input_section->size) 3935 { 3936 #define G0 0 3937 #define O7 15 3938 #define XCC (2 << 20) 3939 #define COND(x) (((x)&0xf)<<25) 3940 #define CONDA COND(0x8) 3941 #define INSN_BPA (F2(0,1) | CONDA | BPRED | XCC) 3942 #define INSN_BA (F2(0,2) | CONDA) 3943 #define INSN_OR F3(2, 0x2, 0) 3944 #define INSN_NOP F2(0,4) 3945 3946 bfd_vma x, y; 3947 3948 /* If the instruction is a call with either: 3949 restore 3950 arithmetic instruction with rd == %o7 3951 where rs1 != %o7 and rs2 if it is register != %o7 3952 then we can optimize if the call destination is near 3953 by changing the call into a branch always. */ 3954 x = bfd_get_32 (input_bfd, contents + rel->r_offset); 3955 y = bfd_get_32 (input_bfd, contents + rel->r_offset + 4); 3956 if ((x & OP(~0)) == OP(1) && (y & OP(~0)) == OP(2)) 3957 { 3958 if (((y & OP3(~0)) == OP3(0x3d) /* restore */ 3959 || ((y & OP3(0x28)) == 0 /* arithmetic */ 3960 && (y & RD(~0)) == RD(O7))) 3961 && (y & RS1(~0)) != RS1(O7) 3962 && ((y & F3I(~0)) 3963 || (y & RS2(~0)) != RS2(O7))) 3964 { 3965 bfd_vma reloc; 3966 3967 reloc = relocation + rel->r_addend - rel->r_offset; 3968 reloc -= (input_section->output_section->vma 3969 + input_section->output_offset); 3970 3971 /* Ensure the branch fits into simm22. */ 3972 if ((reloc & 3) == 0 3973 && ((reloc & ~(bfd_vma)0x7fffff) == 0 3974 || ((reloc | 0x7fffff) == ~(bfd_vma)0))) 3975 { 3976 reloc >>= 2; 3977 3978 /* Check whether it fits into simm19. */ 3979 if (((reloc & 0x3c0000) == 0 3980 || (reloc & 0x3c0000) == 0x3c0000) 3981 && (ABI_64_P (output_bfd) 3982 || elf_elfheader (output_bfd)->e_flags & EF_SPARC_32PLUS)) 3983 x = INSN_BPA | (reloc & 0x7ffff); /* ba,pt %xcc */ 3984 else 3985 x = INSN_BA | (reloc & 0x3fffff); /* ba */ 3986 bfd_put_32 (input_bfd, x, contents + rel->r_offset); 3987 r = bfd_reloc_ok; 3988 if (rel->r_offset >= 4 3989 && (y & (0xffffffff ^ RS1(~0))) 3990 == (INSN_OR | RD(O7) | RS2(G0))) 3991 { 3992 bfd_vma z; 3993 unsigned int reg; 3994 3995 z = bfd_get_32 (input_bfd, 3996 contents + rel->r_offset - 4); 3997 if ((z & (0xffffffff ^ RD(~0))) 3998 != (INSN_OR | RS1(O7) | RS2(G0))) 3999 break; 4000 4001 /* The sequence was 4002 or %o7, %g0, %rN 4003 call foo 4004 or %rN, %g0, %o7 4005 4006 If call foo was replaced with ba, replace 4007 or %rN, %g0, %o7 with nop. */ 4008 4009 reg = (y & RS1(~0)) >> 14; 4010 if (reg != ((z & RD(~0)) >> 25) 4011 || reg == G0 || reg == O7) 4012 break; 4013 4014 bfd_put_32 (input_bfd, (bfd_vma) INSN_NOP, 4015 contents + rel->r_offset + 4); 4016 } 4017 4018 } 4019 } 4020 } 4021 } 4022 4023 if (r == bfd_reloc_continue) 4024 { 4025 do_relocation: 4026 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 4027 contents, rel->r_offset, 4028 relocation, rel->r_addend); 4029 } 4030 if (r != bfd_reloc_ok) 4031 { 4032 switch (r) 4033 { 4034 default: 4035 case bfd_reloc_outofrange: 4036 abort (); 4037 case bfd_reloc_overflow: 4038 { 4039 const char *name; 4040 4041 /* The Solaris native linker silently disregards overflows. 4042 We don't, but this breaks stabs debugging info, whose 4043 relocations are only 32-bits wide. Ignore overflows in 4044 this case and also for discarded entries. */ 4045 if ((r_type == R_SPARC_32 || r_type == R_SPARC_DISP32) 4046 && (((input_section->flags & SEC_DEBUGGING) != 0 4047 && strcmp (bfd_section_name (input_bfd, 4048 input_section), 4049 ".stab") == 0) 4050 || _bfd_elf_section_offset (output_bfd, info, 4051 input_section, 4052 rel->r_offset) 4053 == (bfd_vma)-1)) 4054 break; 4055 4056 if (h != NULL) 4057 { 4058 /* Assume this is a call protected by other code that 4059 detect the symbol is undefined. If this is the case, 4060 we can safely ignore the overflow. If not, the 4061 program is hosed anyway, and a little warning isn't 4062 going to help. */ 4063 if (h->root.type == bfd_link_hash_undefweak 4064 && howto->pc_relative) 4065 break; 4066 4067 name = NULL; 4068 } 4069 else 4070 { 4071 name = bfd_elf_string_from_elf_section (input_bfd, 4072 symtab_hdr->sh_link, 4073 sym->st_name); 4074 if (name == NULL) 4075 return FALSE; 4076 if (*name == '\0') 4077 name = bfd_section_name (input_bfd, sec); 4078 } 4079 if (! ((*info->callbacks->reloc_overflow) 4080 (info, (h ? &h->root : NULL), name, howto->name, 4081 (bfd_vma) 0, input_bfd, input_section, 4082 rel->r_offset))) 4083 return FALSE; 4084 } 4085 break; 4086 } 4087 } 4088 } 4089 4090 return TRUE; 4091 } 4092 4093 /* Build a VxWorks PLT entry. PLT_INDEX is the index of the PLT entry 4094 and PLT_OFFSET is the byte offset from the start of .plt. GOT_OFFSET 4095 is the offset of the associated .got.plt entry from 4096 _GLOBAL_OFFSET_TABLE_. */ 4097 4098 static void 4099 sparc_vxworks_build_plt_entry (bfd *output_bfd, struct bfd_link_info *info, 4100 bfd_vma plt_offset, bfd_vma plt_index, 4101 bfd_vma got_offset) 4102 { 4103 bfd_vma got_base; 4104 const bfd_vma *plt_entry; 4105 struct _bfd_sparc_elf_link_hash_table *htab; 4106 bfd_byte *loc; 4107 Elf_Internal_Rela rela; 4108 4109 htab = _bfd_sparc_elf_hash_table (info); 4110 BFD_ASSERT (htab != NULL); 4111 4112 if (info->shared) 4113 { 4114 plt_entry = sparc_vxworks_shared_plt_entry; 4115 got_base = 0; 4116 } 4117 else 4118 { 4119 plt_entry = sparc_vxworks_exec_plt_entry; 4120 got_base = (htab->elf.hgot->root.u.def.value 4121 + htab->elf.hgot->root.u.def.section->output_offset 4122 + htab->elf.hgot->root.u.def.section->output_section->vma); 4123 } 4124 4125 /* Fill in the entry in the procedure linkage table. */ 4126 bfd_put_32 (output_bfd, plt_entry[0] + ((got_base + got_offset) >> 10), 4127 htab->elf.splt->contents + plt_offset); 4128 bfd_put_32 (output_bfd, plt_entry[1] + ((got_base + got_offset) & 0x3ff), 4129 htab->elf.splt->contents + plt_offset + 4); 4130 bfd_put_32 (output_bfd, plt_entry[2], 4131 htab->elf.splt->contents + plt_offset + 8); 4132 bfd_put_32 (output_bfd, plt_entry[3], 4133 htab->elf.splt->contents + plt_offset + 12); 4134 bfd_put_32 (output_bfd, plt_entry[4], 4135 htab->elf.splt->contents + plt_offset + 16); 4136 bfd_put_32 (output_bfd, plt_entry[5] + (plt_index >> 10), 4137 htab->elf.splt->contents + plt_offset + 20); 4138 /* PC-relative displacement for a branch to the start of 4139 the PLT section. */ 4140 bfd_put_32 (output_bfd, plt_entry[6] + (((-plt_offset - 24) >> 2) 4141 & 0x003fffff), 4142 htab->elf.splt->contents + plt_offset + 24); 4143 bfd_put_32 (output_bfd, plt_entry[7] + (plt_index & 0x3ff), 4144 htab->elf.splt->contents + plt_offset + 28); 4145 4146 /* Fill in the .got.plt entry, pointing initially at the 4147 second half of the PLT entry. */ 4148 BFD_ASSERT (htab->elf.sgotplt != NULL); 4149 bfd_put_32 (output_bfd, 4150 htab->elf.splt->output_section->vma 4151 + htab->elf.splt->output_offset 4152 + plt_offset + 20, 4153 htab->elf.sgotplt->contents + got_offset); 4154 4155 /* Add relocations to .rela.plt.unloaded. */ 4156 if (!info->shared) 4157 { 4158 loc = (htab->srelplt2->contents 4159 + (2 + 3 * plt_index) * sizeof (Elf32_External_Rela)); 4160 4161 /* Relocate the initial sethi. */ 4162 rela.r_offset = (htab->elf.splt->output_section->vma 4163 + htab->elf.splt->output_offset 4164 + plt_offset); 4165 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_HI22); 4166 rela.r_addend = got_offset; 4167 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 4168 loc += sizeof (Elf32_External_Rela); 4169 4170 /* Likewise the following or. */ 4171 rela.r_offset += 4; 4172 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_LO10); 4173 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 4174 loc += sizeof (Elf32_External_Rela); 4175 4176 /* Relocate the .got.plt entry. */ 4177 rela.r_offset = (htab->elf.sgotplt->output_section->vma 4178 + htab->elf.sgotplt->output_offset 4179 + got_offset); 4180 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_SPARC_32); 4181 rela.r_addend = plt_offset + 20; 4182 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 4183 } 4184 } 4185 4186 /* Finish up dynamic symbol handling. We set the contents of various 4187 dynamic sections here. */ 4188 4189 bfd_boolean 4190 _bfd_sparc_elf_finish_dynamic_symbol (bfd *output_bfd, 4191 struct bfd_link_info *info, 4192 struct elf_link_hash_entry *h, 4193 Elf_Internal_Sym *sym) 4194 { 4195 struct _bfd_sparc_elf_link_hash_table *htab; 4196 const struct elf_backend_data *bed; 4197 4198 htab = _bfd_sparc_elf_hash_table (info); 4199 BFD_ASSERT (htab != NULL); 4200 bed = get_elf_backend_data (output_bfd); 4201 4202 if (h->plt.offset != (bfd_vma) -1) 4203 { 4204 asection *splt; 4205 asection *srela; 4206 Elf_Internal_Rela rela; 4207 bfd_byte *loc; 4208 bfd_vma r_offset, got_offset; 4209 int rela_index; 4210 4211 /* When building a static executable, use .iplt and 4212 .rela.iplt sections for STT_GNU_IFUNC symbols. */ 4213 if (htab->elf.splt != NULL) 4214 { 4215 splt = htab->elf.splt; 4216 srela = htab->elf.srelplt; 4217 } 4218 else 4219 { 4220 splt = htab->elf.iplt; 4221 srela = htab->elf.irelplt; 4222 } 4223 4224 if (splt == NULL || srela == NULL) 4225 abort (); 4226 4227 /* Fill in the entry in the .rela.plt section. */ 4228 if (htab->is_vxworks) 4229 { 4230 /* Work out the index of this PLT entry. */ 4231 rela_index = ((h->plt.offset - htab->plt_header_size) 4232 / htab->plt_entry_size); 4233 4234 /* Calculate the offset of the associated .got.plt entry. 4235 The first three entries are reserved. */ 4236 got_offset = (rela_index + 3) * 4; 4237 4238 sparc_vxworks_build_plt_entry (output_bfd, info, h->plt.offset, 4239 rela_index, got_offset); 4240 4241 4242 /* On VxWorks, the relocation points to the .got.plt entry, 4243 not the .plt entry. */ 4244 rela.r_offset = (htab->elf.sgotplt->output_section->vma 4245 + htab->elf.sgotplt->output_offset 4246 + got_offset); 4247 rela.r_addend = 0; 4248 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, h->dynindx, 4249 R_SPARC_JMP_SLOT); 4250 } 4251 else 4252 { 4253 bfd_boolean ifunc = FALSE; 4254 4255 /* Fill in the entry in the procedure linkage table. */ 4256 rela_index = SPARC_ELF_BUILD_PLT_ENTRY (htab, output_bfd, splt, 4257 h->plt.offset, splt->size, 4258 &r_offset); 4259 4260 if (h == NULL 4261 || h->dynindx == -1 4262 || ((info->executable 4263 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 4264 && h->def_regular 4265 && h->type == STT_GNU_IFUNC)) 4266 { 4267 ifunc = TRUE; 4268 BFD_ASSERT (h == NULL 4269 || (h->type == STT_GNU_IFUNC 4270 && h->def_regular 4271 && (h->root.type == bfd_link_hash_defined 4272 || h->root.type == bfd_link_hash_defweak))); 4273 } 4274 4275 rela.r_offset = r_offset 4276 + (splt->output_section->vma + splt->output_offset); 4277 if (ABI_64_P (output_bfd) 4278 && h->plt.offset >= (PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE)) 4279 { 4280 if (ifunc) 4281 { 4282 rela.r_addend = (h->root.u.def.section->output_section->vma 4283 + h->root.u.def.section->output_offset 4284 + h->root.u.def.value); 4285 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, 0, 4286 R_SPARC_IRELATIVE); 4287 } 4288 else 4289 { 4290 rela.r_addend = (-(h->plt.offset + 4) 4291 - splt->output_section->vma 4292 - splt->output_offset); 4293 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, h->dynindx, 4294 R_SPARC_JMP_SLOT); 4295 } 4296 } 4297 else 4298 { 4299 if (ifunc) 4300 { 4301 rela.r_addend = (h->root.u.def.section->output_section->vma 4302 + h->root.u.def.section->output_offset 4303 + h->root.u.def.value); 4304 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, 0, 4305 R_SPARC_JMP_IREL); 4306 } 4307 else 4308 { 4309 rela.r_addend = 0; 4310 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, h->dynindx, 4311 R_SPARC_JMP_SLOT); 4312 } 4313 } 4314 } 4315 4316 /* Adjust for the first 4 reserved elements in the .plt section 4317 when setting the offset in the .rela.plt section. 4318 Sun forgot to read their own ABI and copied elf32-sparc behaviour, 4319 thus .plt[4] has corresponding .rela.plt[0] and so on. */ 4320 4321 loc = srela->contents; 4322 loc += rela_index * bed->s->sizeof_rela; 4323 bed->s->swap_reloca_out (output_bfd, &rela, loc); 4324 4325 if (!h->def_regular) 4326 { 4327 /* Mark the symbol as undefined, rather than as defined in 4328 the .plt section. Leave the value alone. */ 4329 sym->st_shndx = SHN_UNDEF; 4330 /* If the symbol is weak, we do need to clear the value. 4331 Otherwise, the PLT entry would provide a definition for 4332 the symbol even if the symbol wasn't defined anywhere, 4333 and so the symbol would never be NULL. */ 4334 if (!h->ref_regular_nonweak) 4335 sym->st_value = 0; 4336 } 4337 } 4338 4339 if (h->got.offset != (bfd_vma) -1 4340 && _bfd_sparc_elf_hash_entry(h)->tls_type != GOT_TLS_GD 4341 && _bfd_sparc_elf_hash_entry(h)->tls_type != GOT_TLS_IE) 4342 { 4343 asection *sgot; 4344 asection *srela; 4345 Elf_Internal_Rela rela; 4346 4347 /* This symbol has an entry in the GOT. Set it up. */ 4348 4349 sgot = htab->elf.sgot; 4350 srela = htab->elf.srelgot; 4351 BFD_ASSERT (sgot != NULL && srela != NULL); 4352 4353 rela.r_offset = (sgot->output_section->vma 4354 + sgot->output_offset 4355 + (h->got.offset &~ (bfd_vma) 1)); 4356 4357 /* If this is a -Bsymbolic link, and the symbol is defined 4358 locally, we just want to emit a RELATIVE reloc. Likewise if 4359 the symbol was forced to be local because of a version file. 4360 The entry in the global offset table will already have been 4361 initialized in the relocate_section function. */ 4362 if (! info->shared 4363 && h->type == STT_GNU_IFUNC 4364 && h->def_regular) 4365 { 4366 asection *plt; 4367 4368 /* We load the GOT entry with the PLT entry. */ 4369 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; 4370 SPARC_ELF_PUT_WORD (htab, output_bfd, 4371 (plt->output_section->vma 4372 + plt->output_offset + h->plt.offset), 4373 htab->elf.sgot->contents 4374 + (h->got.offset & ~(bfd_vma) 1)); 4375 return TRUE; 4376 } 4377 else if (info->shared 4378 && SYMBOL_REFERENCES_LOCAL (info, h)) 4379 { 4380 asection *sec = h->root.u.def.section; 4381 if (h->type == STT_GNU_IFUNC) 4382 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, 0, R_SPARC_IRELATIVE); 4383 else 4384 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, 0, R_SPARC_RELATIVE); 4385 rela.r_addend = (h->root.u.def.value 4386 + sec->output_section->vma 4387 + sec->output_offset); 4388 } 4389 else 4390 { 4391 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, h->dynindx, R_SPARC_GLOB_DAT); 4392 rela.r_addend = 0; 4393 } 4394 4395 SPARC_ELF_PUT_WORD (htab, output_bfd, 0, 4396 sgot->contents + (h->got.offset & ~(bfd_vma) 1)); 4397 sparc_elf_append_rela (output_bfd, srela, &rela); 4398 } 4399 4400 if (h->needs_copy) 4401 { 4402 asection *s; 4403 Elf_Internal_Rela rela; 4404 4405 /* This symbols needs a copy reloc. Set it up. */ 4406 BFD_ASSERT (h->dynindx != -1); 4407 4408 s = bfd_get_section_by_name (h->root.u.def.section->owner, 4409 ".rela.bss"); 4410 BFD_ASSERT (s != NULL); 4411 4412 rela.r_offset = (h->root.u.def.value 4413 + h->root.u.def.section->output_section->vma 4414 + h->root.u.def.section->output_offset); 4415 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, h->dynindx, R_SPARC_COPY); 4416 rela.r_addend = 0; 4417 sparc_elf_append_rela (output_bfd, s, &rela); 4418 } 4419 4420 /* Mark some specially defined symbols as absolute. On VxWorks, 4421 _GLOBAL_OFFSET_TABLE_ is not absolute: it is relative to the 4422 ".got" section. Likewise _PROCEDURE_LINKAGE_TABLE_ and ".plt". */ 4423 if (sym != NULL 4424 && (strcmp (h->root.root.string, "_DYNAMIC") == 0 4425 || (!htab->is_vxworks 4426 && (h == htab->elf.hgot || h == htab->elf.hplt)))) 4427 sym->st_shndx = SHN_ABS; 4428 4429 return TRUE; 4430 } 4431 4432 /* Finish up the dynamic sections. */ 4433 4434 static bfd_boolean 4435 sparc_finish_dyn (bfd *output_bfd, struct bfd_link_info *info, 4436 bfd *dynobj, asection *sdyn, 4437 asection *splt ATTRIBUTE_UNUSED) 4438 { 4439 struct _bfd_sparc_elf_link_hash_table *htab; 4440 const struct elf_backend_data *bed; 4441 bfd_byte *dyncon, *dynconend; 4442 size_t dynsize; 4443 int stt_regidx = -1; 4444 bfd_boolean abi_64_p; 4445 4446 htab = _bfd_sparc_elf_hash_table (info); 4447 BFD_ASSERT (htab != NULL); 4448 bed = get_elf_backend_data (output_bfd); 4449 dynsize = bed->s->sizeof_dyn; 4450 dynconend = sdyn->contents + sdyn->size; 4451 abi_64_p = ABI_64_P (output_bfd); 4452 for (dyncon = sdyn->contents; dyncon < dynconend; dyncon += dynsize) 4453 { 4454 Elf_Internal_Dyn dyn; 4455 const char *name; 4456 bfd_boolean size; 4457 4458 bed->s->swap_dyn_in (dynobj, dyncon, &dyn); 4459 4460 if (htab->is_vxworks && dyn.d_tag == DT_RELASZ) 4461 { 4462 /* On VxWorks, DT_RELASZ should not include the relocations 4463 in .rela.plt. */ 4464 if (htab->elf.srelplt) 4465 { 4466 dyn.d_un.d_val -= htab->elf.srelplt->size; 4467 bed->s->swap_dyn_out (output_bfd, &dyn, dyncon); 4468 } 4469 } 4470 else if (htab->is_vxworks && dyn.d_tag == DT_PLTGOT) 4471 { 4472 /* On VxWorks, DT_PLTGOT should point to the start of the GOT, 4473 not to the start of the PLT. */ 4474 if (htab->elf.sgotplt) 4475 { 4476 dyn.d_un.d_val = (htab->elf.sgotplt->output_section->vma 4477 + htab->elf.sgotplt->output_offset); 4478 bed->s->swap_dyn_out (output_bfd, &dyn, dyncon); 4479 } 4480 } 4481 else if (htab->is_vxworks 4482 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) 4483 bed->s->swap_dyn_out (output_bfd, &dyn, dyncon); 4484 else if (abi_64_p && dyn.d_tag == DT_SPARC_REGISTER) 4485 { 4486 if (stt_regidx == -1) 4487 { 4488 stt_regidx = 4489 _bfd_elf_link_lookup_local_dynindx (info, output_bfd, -1); 4490 if (stt_regidx == -1) 4491 return FALSE; 4492 } 4493 dyn.d_un.d_val = stt_regidx++; 4494 bed->s->swap_dyn_out (output_bfd, &dyn, dyncon); 4495 } 4496 else 4497 { 4498 switch (dyn.d_tag) 4499 { 4500 case DT_PLTGOT: name = ".plt"; size = FALSE; break; 4501 case DT_PLTRELSZ: name = ".rela.plt"; size = TRUE; break; 4502 case DT_JMPREL: name = ".rela.plt"; size = FALSE; break; 4503 default: name = NULL; size = FALSE; break; 4504 } 4505 4506 if (name != NULL) 4507 { 4508 asection *s; 4509 4510 s = bfd_get_section_by_name (output_bfd, name); 4511 if (s == NULL) 4512 dyn.d_un.d_val = 0; 4513 else 4514 { 4515 if (! size) 4516 dyn.d_un.d_ptr = s->vma; 4517 else 4518 dyn.d_un.d_val = s->size; 4519 } 4520 bed->s->swap_dyn_out (output_bfd, &dyn, dyncon); 4521 } 4522 } 4523 } 4524 return TRUE; 4525 } 4526 4527 /* Install the first PLT entry in a VxWorks executable and make sure that 4528 .rela.plt.unloaded relocations have the correct symbol indexes. */ 4529 4530 static void 4531 sparc_vxworks_finish_exec_plt (bfd *output_bfd, struct bfd_link_info *info) 4532 { 4533 struct _bfd_sparc_elf_link_hash_table *htab; 4534 Elf_Internal_Rela rela; 4535 bfd_vma got_base; 4536 bfd_byte *loc; 4537 4538 htab = _bfd_sparc_elf_hash_table (info); 4539 BFD_ASSERT (htab != NULL); 4540 4541 /* Calculate the absolute value of _GLOBAL_OFFSET_TABLE_. */ 4542 got_base = (htab->elf.hgot->root.u.def.section->output_section->vma 4543 + htab->elf.hgot->root.u.def.section->output_offset 4544 + htab->elf.hgot->root.u.def.value); 4545 4546 /* Install the initial PLT entry. */ 4547 bfd_put_32 (output_bfd, 4548 sparc_vxworks_exec_plt0_entry[0] + ((got_base + 8) >> 10), 4549 htab->elf.splt->contents); 4550 bfd_put_32 (output_bfd, 4551 sparc_vxworks_exec_plt0_entry[1] + ((got_base + 8) & 0x3ff), 4552 htab->elf.splt->contents + 4); 4553 bfd_put_32 (output_bfd, 4554 sparc_vxworks_exec_plt0_entry[2], 4555 htab->elf.splt->contents + 8); 4556 bfd_put_32 (output_bfd, 4557 sparc_vxworks_exec_plt0_entry[3], 4558 htab->elf.splt->contents + 12); 4559 bfd_put_32 (output_bfd, 4560 sparc_vxworks_exec_plt0_entry[4], 4561 htab->elf.splt->contents + 16); 4562 4563 loc = htab->srelplt2->contents; 4564 4565 /* Add an unloaded relocation for the initial entry's "sethi". */ 4566 rela.r_offset = (htab->elf.splt->output_section->vma 4567 + htab->elf.splt->output_offset); 4568 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_HI22); 4569 rela.r_addend = 8; 4570 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 4571 loc += sizeof (Elf32_External_Rela); 4572 4573 /* Likewise the following "or". */ 4574 rela.r_offset += 4; 4575 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_LO10); 4576 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 4577 loc += sizeof (Elf32_External_Rela); 4578 4579 /* Fix up the remaining .rela.plt.unloaded relocations. They may have 4580 the wrong symbol index for _G_O_T_ or _P_L_T_ depending on the order 4581 in which symbols were output. */ 4582 while (loc < htab->srelplt2->contents + htab->srelplt2->size) 4583 { 4584 Elf_Internal_Rela rel; 4585 4586 /* The entry's initial "sethi" (against _G_O_T_). */ 4587 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 4588 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_HI22); 4589 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 4590 loc += sizeof (Elf32_External_Rela); 4591 4592 /* The following "or" (also against _G_O_T_). */ 4593 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 4594 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_LO10); 4595 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 4596 loc += sizeof (Elf32_External_Rela); 4597 4598 /* The .got.plt entry (against _P_L_T_). */ 4599 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 4600 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_SPARC_32); 4601 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 4602 loc += sizeof (Elf32_External_Rela); 4603 } 4604 } 4605 4606 /* Install the first PLT entry in a VxWorks shared object. */ 4607 4608 static void 4609 sparc_vxworks_finish_shared_plt (bfd *output_bfd, struct bfd_link_info *info) 4610 { 4611 struct _bfd_sparc_elf_link_hash_table *htab; 4612 unsigned int i; 4613 4614 htab = _bfd_sparc_elf_hash_table (info); 4615 BFD_ASSERT (htab != NULL); 4616 4617 for (i = 0; i < ARRAY_SIZE (sparc_vxworks_shared_plt0_entry); i++) 4618 bfd_put_32 (output_bfd, sparc_vxworks_shared_plt0_entry[i], 4619 htab->elf.splt->contents + i * 4); 4620 } 4621 4622 /* Finish up local dynamic symbol handling. We set the contents of 4623 various dynamic sections here. */ 4624 4625 static bfd_boolean 4626 finish_local_dynamic_symbol (void **slot, void *inf) 4627 { 4628 struct elf_link_hash_entry *h 4629 = (struct elf_link_hash_entry *) *slot; 4630 struct bfd_link_info *info 4631 = (struct bfd_link_info *) inf; 4632 4633 return _bfd_sparc_elf_finish_dynamic_symbol (info->output_bfd, info, 4634 h, NULL); 4635 } 4636 4637 bfd_boolean 4638 _bfd_sparc_elf_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) 4639 { 4640 bfd *dynobj; 4641 asection *sdyn; 4642 struct _bfd_sparc_elf_link_hash_table *htab; 4643 4644 htab = _bfd_sparc_elf_hash_table (info); 4645 BFD_ASSERT (htab != NULL); 4646 dynobj = htab->elf.dynobj; 4647 4648 sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); 4649 4650 if (elf_hash_table (info)->dynamic_sections_created) 4651 { 4652 asection *splt; 4653 4654 splt = bfd_get_section_by_name (dynobj, ".plt"); 4655 BFD_ASSERT (splt != NULL && sdyn != NULL); 4656 4657 if (!sparc_finish_dyn (output_bfd, info, dynobj, sdyn, splt)) 4658 return FALSE; 4659 4660 /* Initialize the contents of the .plt section. */ 4661 if (splt->size > 0) 4662 { 4663 if (htab->is_vxworks) 4664 { 4665 if (info->shared) 4666 sparc_vxworks_finish_shared_plt (output_bfd, info); 4667 else 4668 sparc_vxworks_finish_exec_plt (output_bfd, info); 4669 } 4670 else 4671 { 4672 memset (splt->contents, 0, htab->plt_header_size); 4673 if (!ABI_64_P (output_bfd)) 4674 bfd_put_32 (output_bfd, (bfd_vma) SPARC_NOP, 4675 splt->contents + splt->size - 4); 4676 } 4677 } 4678 4679 elf_section_data (splt->output_section)->this_hdr.sh_entsize 4680 = (htab->is_vxworks || !ABI_64_P (output_bfd)) 4681 ? 0 : htab->plt_entry_size; 4682 } 4683 4684 /* Set the first entry in the global offset table to the address of 4685 the dynamic section. */ 4686 if (htab->elf.sgot && htab->elf.sgot->size > 0) 4687 { 4688 bfd_vma val = (sdyn ? 4689 sdyn->output_section->vma + sdyn->output_offset : 4690 0); 4691 4692 SPARC_ELF_PUT_WORD (htab, output_bfd, val, htab->elf.sgot->contents); 4693 } 4694 4695 if (htab->elf.sgot) 4696 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4697 SPARC_ELF_WORD_BYTES (htab); 4698 4699 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ 4700 htab_traverse (htab->loc_hash_table, finish_local_dynamic_symbol, info); 4701 4702 return TRUE; 4703 } 4704 4705 4706 /* Set the right machine number for a SPARC ELF file. */ 4707 4708 bfd_boolean 4709 _bfd_sparc_elf_object_p (bfd *abfd) 4710 { 4711 if (ABI_64_P (abfd)) 4712 { 4713 unsigned long mach = bfd_mach_sparc_v9; 4714 4715 if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US3) 4716 mach = bfd_mach_sparc_v9b; 4717 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1) 4718 mach = bfd_mach_sparc_v9a; 4719 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, mach); 4720 } 4721 else 4722 { 4723 if (elf_elfheader (abfd)->e_machine == EM_SPARC32PLUS) 4724 { 4725 if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US3) 4726 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, 4727 bfd_mach_sparc_v8plusb); 4728 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1) 4729 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, 4730 bfd_mach_sparc_v8plusa); 4731 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_32PLUS) 4732 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, 4733 bfd_mach_sparc_v8plus); 4734 else 4735 return FALSE; 4736 } 4737 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_LEDATA) 4738 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, 4739 bfd_mach_sparc_sparclite_le); 4740 else 4741 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc); 4742 } 4743 } 4744 4745 /* Return address for Ith PLT stub in section PLT, for relocation REL 4746 or (bfd_vma) -1 if it should not be included. */ 4747 4748 bfd_vma 4749 _bfd_sparc_elf_plt_sym_val (bfd_vma i, const asection *plt, const arelent *rel) 4750 { 4751 if (ABI_64_P (plt->owner)) 4752 { 4753 bfd_vma j; 4754 4755 i += PLT64_HEADER_SIZE / PLT64_ENTRY_SIZE; 4756 if (i < PLT64_LARGE_THRESHOLD) 4757 return plt->vma + i * PLT64_ENTRY_SIZE; 4758 4759 j = (i - PLT64_LARGE_THRESHOLD) % 160; 4760 i -= j; 4761 return plt->vma + i * PLT64_ENTRY_SIZE + j * 4 * 6; 4762 } 4763 else 4764 return rel->address; 4765 } 4766