1 /* SPARC-specific support for 32-bit ELF 2 Copyright (C) 1993-2018 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 #include "sysdep.h" 22 #include "bfd.h" 23 #include "bfdlink.h" 24 #include "libbfd.h" 25 #include "elf-bfd.h" 26 #include "elf/sparc.h" 27 #include "opcode/sparc.h" 28 #include "elfxx-sparc.h" 29 #include "elf-vxworks.h" 30 31 /* Support for core dump NOTE sections. */ 32 33 static bfd_boolean 34 elf32_sparc_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 35 { 36 switch (note->descsz) 37 { 38 default: 39 return FALSE; 40 41 case 260: /* Solaris prpsinfo_t. */ 42 elf_tdata (abfd)->core->program 43 = _bfd_elfcore_strndup (abfd, note->descdata + 84, 16); 44 elf_tdata (abfd)->core->command 45 = _bfd_elfcore_strndup (abfd, note->descdata + 100, 80); 46 break; 47 48 case 336: /* Solaris psinfo_t. */ 49 elf_tdata (abfd)->core->program 50 = _bfd_elfcore_strndup (abfd, note->descdata + 88, 16); 51 elf_tdata (abfd)->core->command 52 = _bfd_elfcore_strndup (abfd, note->descdata + 104, 80); 53 break; 54 } 55 56 return TRUE; 57 } 58 59 /* Functions for dealing with the e_flags field. 60 61 We don't define set_private_flags or copy_private_bfd_data because 62 the only currently defined values are based on the bfd mach number, 63 so we use the latter instead and defer setting e_flags until the 64 file is written out. */ 65 66 /* Merge backend specific data from an object file to the output 67 object file when linking. */ 68 69 static bfd_boolean 70 elf32_sparc_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 71 { 72 bfd *obfd = info->output_bfd; 73 bfd_boolean error; 74 unsigned long ibfd_mach; 75 /* FIXME: This should not be static. */ 76 static unsigned long previous_ibfd_e_flags = (unsigned long) -1; 77 78 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 79 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 80 return TRUE; 81 82 error = FALSE; 83 84 ibfd_mach = bfd_get_mach (ibfd); 85 if (bfd_mach_sparc_64bit_p (ibfd_mach)) 86 { 87 error = TRUE; 88 _bfd_error_handler 89 (_("%B: compiled for a 64 bit system and target is 32 bit"), ibfd); 90 } 91 else if ((ibfd->flags & DYNAMIC) == 0) 92 { 93 if (bfd_get_mach (obfd) < ibfd_mach) 94 bfd_set_arch_mach (obfd, bfd_arch_sparc, ibfd_mach); 95 } 96 97 if (((elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA) 98 != previous_ibfd_e_flags) 99 && previous_ibfd_e_flags != (unsigned long) -1) 100 { 101 _bfd_error_handler 102 (_("%B: linking little endian files with big endian files"), ibfd); 103 error = TRUE; 104 } 105 previous_ibfd_e_flags = elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA; 106 107 if (error) 108 { 109 bfd_set_error (bfd_error_bad_value); 110 return FALSE; 111 } 112 113 return _bfd_sparc_elf_merge_private_bfd_data (ibfd, info); 114 } 115 116 /* The final processing done just before writing out the object file. 117 We need to set the e_machine field appropriately. */ 118 119 static void 120 elf32_sparc_final_write_processing (bfd *abfd, 121 bfd_boolean linker ATTRIBUTE_UNUSED) 122 { 123 switch (bfd_get_mach (abfd)) 124 { 125 case bfd_mach_sparc : 126 case bfd_mach_sparc_sparclet : 127 case bfd_mach_sparc_sparclite : 128 break; /* nothing to do */ 129 case bfd_mach_sparc_v8plus : 130 elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS; 131 elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK; 132 elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS; 133 break; 134 case bfd_mach_sparc_v8plusa : 135 elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS; 136 elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK; 137 elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1; 138 break; 139 case bfd_mach_sparc_v8plusb : 140 case bfd_mach_sparc_v8plusc : 141 case bfd_mach_sparc_v8plusd : 142 case bfd_mach_sparc_v8pluse : 143 case bfd_mach_sparc_v8plusv : 144 case bfd_mach_sparc_v8plusm : 145 case bfd_mach_sparc_v8plusm8 : 146 elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS; 147 elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK; 148 elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1 149 | EF_SPARC_SUN_US3; 150 break; 151 case bfd_mach_sparc_sparclite_le : 152 elf_elfheader (abfd)->e_flags |= EF_SPARC_LEDATA; 153 break; 154 default : 155 abort (); 156 break; 157 } 158 } 159 160 static enum elf_reloc_type_class 161 elf32_sparc_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 162 const asection *rel_sec ATTRIBUTE_UNUSED, 163 const Elf_Internal_Rela *rela) 164 { 165 switch ((int) ELF32_R_TYPE (rela->r_info)) 166 { 167 case R_SPARC_RELATIVE: 168 return reloc_class_relative; 169 case R_SPARC_JMP_SLOT: 170 return reloc_class_plt; 171 case R_SPARC_COPY: 172 return reloc_class_copy; 173 default: 174 return reloc_class_normal; 175 } 176 } 177 178 /* Hook called by the linker routine which adds symbols from an object 179 file. */ 180 181 static bfd_boolean 182 elf32_sparc_add_symbol_hook (bfd * abfd, 183 struct bfd_link_info * info, 184 Elf_Internal_Sym * sym, 185 const char ** namep ATTRIBUTE_UNUSED, 186 flagword * flagsp ATTRIBUTE_UNUSED, 187 asection ** secp ATTRIBUTE_UNUSED, 188 bfd_vma * valp ATTRIBUTE_UNUSED) 189 { 190 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC 191 && (abfd->flags & DYNAMIC) == 0 192 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) 193 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc; 194 return TRUE; 195 } 196 197 #define TARGET_BIG_SYM sparc_elf32_vec 198 #define TARGET_BIG_NAME "elf32-sparc" 199 #define ELF_ARCH bfd_arch_sparc 200 #define ELF_TARGET_ID SPARC_ELF_DATA 201 #define ELF_MACHINE_CODE EM_SPARC 202 #define ELF_MACHINE_ALT1 EM_SPARC32PLUS 203 #define ELF_MAXPAGESIZE 0x10000 204 #define ELF_COMMONPAGESIZE 0x2000 205 206 #define bfd_elf32_bfd_merge_private_bfd_data \ 207 elf32_sparc_merge_private_bfd_data 208 #define elf_backend_final_write_processing \ 209 elf32_sparc_final_write_processing 210 #define elf_backend_grok_psinfo elf32_sparc_grok_psinfo 211 #define elf_backend_reloc_type_class elf32_sparc_reloc_type_class 212 213 #define elf_info_to_howto _bfd_sparc_elf_info_to_howto 214 #define bfd_elf32_bfd_reloc_type_lookup _bfd_sparc_elf_reloc_type_lookup 215 #define bfd_elf32_bfd_reloc_name_lookup \ 216 _bfd_sparc_elf_reloc_name_lookup 217 #define bfd_elf32_bfd_link_hash_table_create \ 218 _bfd_sparc_elf_link_hash_table_create 219 #define bfd_elf32_bfd_relax_section _bfd_sparc_elf_relax_section 220 #define bfd_elf32_new_section_hook _bfd_sparc_elf_new_section_hook 221 #define elf_backend_copy_indirect_symbol \ 222 _bfd_sparc_elf_copy_indirect_symbol 223 #define elf_backend_create_dynamic_sections \ 224 _bfd_sparc_elf_create_dynamic_sections 225 #define elf_backend_check_relocs _bfd_sparc_elf_check_relocs 226 #define elf_backend_adjust_dynamic_symbol \ 227 _bfd_sparc_elf_adjust_dynamic_symbol 228 #define elf_backend_omit_section_dynsym _bfd_sparc_elf_omit_section_dynsym 229 #define elf_backend_size_dynamic_sections \ 230 _bfd_sparc_elf_size_dynamic_sections 231 #define elf_backend_relocate_section _bfd_sparc_elf_relocate_section 232 #define elf_backend_finish_dynamic_symbol \ 233 _bfd_sparc_elf_finish_dynamic_symbol 234 #define elf_backend_finish_dynamic_sections \ 235 _bfd_sparc_elf_finish_dynamic_sections 236 #define bfd_elf32_mkobject _bfd_sparc_elf_mkobject 237 #define elf_backend_object_p _bfd_sparc_elf_object_p 238 #define elf_backend_gc_mark_hook _bfd_sparc_elf_gc_mark_hook 239 #define elf_backend_plt_sym_val _bfd_sparc_elf_plt_sym_val 240 #define elf_backend_init_index_section _bfd_elf_init_1_index_section 241 #define elf_backend_fixup_symbol _bfd_sparc_elf_fixup_symbol 242 243 #define elf_backend_can_gc_sections 1 244 #define elf_backend_can_refcount 1 245 #define elf_backend_want_got_plt 0 246 #define elf_backend_plt_readonly 0 247 #define elf_backend_want_plt_sym 1 248 #define elf_backend_got_header_size 4 249 #define elf_backend_want_dynrelro 1 250 #define elf_backend_rela_normal 1 251 252 #define elf_backend_add_symbol_hook elf32_sparc_add_symbol_hook 253 254 #define elf_backend_linux_prpsinfo32_ugid16 TRUE 255 256 #include "elf32-target.h" 257 258 /* Solaris 2. */ 259 260 #undef TARGET_BIG_SYM 261 #define TARGET_BIG_SYM sparc_elf32_sol2_vec 262 #undef TARGET_BIG_NAME 263 #define TARGET_BIG_NAME "elf32-sparc-sol2" 264 265 #undef elf32_bed 266 #define elf32_bed elf32_sparc_sol2_bed 267 268 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte 269 boundary. */ 270 #undef elf_backend_static_tls_alignment 271 #define elf_backend_static_tls_alignment 8 272 273 #undef elf_backend_strtab_flags 274 #define elf_backend_strtab_flags SHF_STRINGS 275 276 static bfd_boolean 277 elf32_sparc_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, 278 bfd *obfd ATTRIBUTE_UNUSED, 279 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, 280 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) 281 { 282 /* PR 19938: FIXME: Need to add code for setting the sh_info 283 and sh_link fields of Solaris specific section types. */ 284 return FALSE; 285 } 286 287 #undef elf_backend_copy_special_section_fields 288 #define elf_backend_copy_special_section_fields elf32_sparc_copy_solaris_special_section_fields 289 290 #include "elf32-target.h" 291 292 /* A wrapper around _bfd_sparc_elf_link_hash_table_create that identifies 293 the target system as VxWorks. */ 294 295 static struct bfd_link_hash_table * 296 elf32_sparc_vxworks_link_hash_table_create (bfd *abfd) 297 { 298 struct bfd_link_hash_table *ret; 299 300 ret = _bfd_sparc_elf_link_hash_table_create (abfd); 301 if (ret) 302 { 303 struct _bfd_sparc_elf_link_hash_table *htab; 304 305 htab = (struct _bfd_sparc_elf_link_hash_table *) ret; 306 htab->is_vxworks = 1; 307 } 308 return ret; 309 } 310 311 /* A final_write_processing hook that does both the SPARC- and VxWorks- 312 specific handling. */ 313 314 static void 315 elf32_sparc_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) 316 { 317 elf32_sparc_final_write_processing (abfd, linker); 318 elf_vxworks_final_write_processing (abfd, linker); 319 } 320 321 #undef TARGET_BIG_SYM 322 #define TARGET_BIG_SYM sparc_elf32_vxworks_vec 323 #undef TARGET_BIG_NAME 324 #define TARGET_BIG_NAME "elf32-sparc-vxworks" 325 326 #undef ELF_MINPAGESIZE 327 #define ELF_MINPAGESIZE 0x1000 328 329 #undef bfd_elf32_bfd_link_hash_table_create 330 #define bfd_elf32_bfd_link_hash_table_create \ 331 elf32_sparc_vxworks_link_hash_table_create 332 333 #undef elf_backend_want_got_plt 334 #define elf_backend_want_got_plt 1 335 #undef elf_backend_plt_readonly 336 #define elf_backend_plt_readonly 1 337 #undef elf_backend_got_header_size 338 #define elf_backend_got_header_size 12 339 #undef elf_backend_dtrel_excludes_plt 340 #define elf_backend_dtrel_excludes_plt 1 341 #undef elf_backend_add_symbol_hook 342 #define elf_backend_add_symbol_hook \ 343 elf_vxworks_add_symbol_hook 344 #undef elf_backend_link_output_symbol_hook 345 #define elf_backend_link_output_symbol_hook \ 346 elf_vxworks_link_output_symbol_hook 347 #undef elf_backend_emit_relocs 348 #define elf_backend_emit_relocs \ 349 elf_vxworks_emit_relocs 350 #undef elf_backend_final_write_processing 351 #define elf_backend_final_write_processing \ 352 elf32_sparc_vxworks_final_write_processing 353 #undef elf_backend_static_tls_alignment 354 #undef elf_backend_strtab_flags 355 #undef elf_backend_copy_special_section_fields 356 357 #undef elf32_bed 358 #define elf32_bed sparc_elf_vxworks_bed 359 360 #include "elf32-target.h" 361