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 (_("%pB: 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 (_("%pB: 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 #define TARGET_BIG_SYM sparc_elf32_vec 179 #define TARGET_BIG_NAME "elf32-sparc" 180 #define ELF_ARCH bfd_arch_sparc 181 #define ELF_TARGET_ID SPARC_ELF_DATA 182 #define ELF_MACHINE_CODE EM_SPARC 183 #define ELF_MACHINE_ALT1 EM_SPARC32PLUS 184 #define ELF_MAXPAGESIZE 0x10000 185 #define ELF_COMMONPAGESIZE 0x2000 186 187 #define bfd_elf32_bfd_merge_private_bfd_data \ 188 elf32_sparc_merge_private_bfd_data 189 #define elf_backend_final_write_processing \ 190 elf32_sparc_final_write_processing 191 #define elf_backend_grok_psinfo elf32_sparc_grok_psinfo 192 #define elf_backend_reloc_type_class elf32_sparc_reloc_type_class 193 194 #define elf_info_to_howto _bfd_sparc_elf_info_to_howto 195 #define bfd_elf32_bfd_reloc_type_lookup _bfd_sparc_elf_reloc_type_lookup 196 #define bfd_elf32_bfd_reloc_name_lookup \ 197 _bfd_sparc_elf_reloc_name_lookup 198 #define bfd_elf32_bfd_link_hash_table_create \ 199 _bfd_sparc_elf_link_hash_table_create 200 #define bfd_elf32_bfd_relax_section _bfd_sparc_elf_relax_section 201 #define bfd_elf32_new_section_hook _bfd_sparc_elf_new_section_hook 202 #define elf_backend_copy_indirect_symbol \ 203 _bfd_sparc_elf_copy_indirect_symbol 204 #define elf_backend_create_dynamic_sections \ 205 _bfd_sparc_elf_create_dynamic_sections 206 #define elf_backend_check_relocs _bfd_sparc_elf_check_relocs 207 #define elf_backend_adjust_dynamic_symbol \ 208 _bfd_sparc_elf_adjust_dynamic_symbol 209 #define elf_backend_omit_section_dynsym _bfd_sparc_elf_omit_section_dynsym 210 #define elf_backend_size_dynamic_sections \ 211 _bfd_sparc_elf_size_dynamic_sections 212 #define elf_backend_relocate_section _bfd_sparc_elf_relocate_section 213 #define elf_backend_finish_dynamic_symbol \ 214 _bfd_sparc_elf_finish_dynamic_symbol 215 #define elf_backend_finish_dynamic_sections \ 216 _bfd_sparc_elf_finish_dynamic_sections 217 #define bfd_elf32_mkobject _bfd_sparc_elf_mkobject 218 #define elf_backend_object_p _bfd_sparc_elf_object_p 219 #define elf_backend_gc_mark_hook _bfd_sparc_elf_gc_mark_hook 220 #define elf_backend_plt_sym_val _bfd_sparc_elf_plt_sym_val 221 #define elf_backend_init_index_section _bfd_elf_init_1_index_section 222 #define elf_backend_fixup_symbol _bfd_sparc_elf_fixup_symbol 223 224 #define elf_backend_can_gc_sections 1 225 #define elf_backend_can_refcount 1 226 #define elf_backend_want_got_plt 0 227 #define elf_backend_plt_readonly 0 228 #define elf_backend_want_plt_sym 1 229 #define elf_backend_got_header_size 4 230 #define elf_backend_want_dynrelro 1 231 #define elf_backend_rela_normal 1 232 233 #define elf_backend_linux_prpsinfo32_ugid16 TRUE 234 235 #include "elf32-target.h" 236 237 /* Solaris 2. */ 238 239 #undef TARGET_BIG_SYM 240 #define TARGET_BIG_SYM sparc_elf32_sol2_vec 241 #undef TARGET_BIG_NAME 242 #define TARGET_BIG_NAME "elf32-sparc-sol2" 243 244 #undef elf32_bed 245 #define elf32_bed elf32_sparc_sol2_bed 246 247 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte 248 boundary. */ 249 #undef elf_backend_static_tls_alignment 250 #define elf_backend_static_tls_alignment 8 251 252 #undef elf_backend_strtab_flags 253 #define elf_backend_strtab_flags SHF_STRINGS 254 255 static bfd_boolean 256 elf32_sparc_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, 257 bfd *obfd ATTRIBUTE_UNUSED, 258 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, 259 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) 260 { 261 /* PR 19938: FIXME: Need to add code for setting the sh_info 262 and sh_link fields of Solaris specific section types. */ 263 return FALSE; 264 } 265 266 #undef elf_backend_copy_special_section_fields 267 #define elf_backend_copy_special_section_fields elf32_sparc_copy_solaris_special_section_fields 268 269 #include "elf32-target.h" 270 271 /* A wrapper around _bfd_sparc_elf_link_hash_table_create that identifies 272 the target system as VxWorks. */ 273 274 static struct bfd_link_hash_table * 275 elf32_sparc_vxworks_link_hash_table_create (bfd *abfd) 276 { 277 struct bfd_link_hash_table *ret; 278 279 ret = _bfd_sparc_elf_link_hash_table_create (abfd); 280 if (ret) 281 { 282 struct _bfd_sparc_elf_link_hash_table *htab; 283 284 htab = (struct _bfd_sparc_elf_link_hash_table *) ret; 285 htab->is_vxworks = 1; 286 } 287 return ret; 288 } 289 290 /* A final_write_processing hook that does both the SPARC- and VxWorks- 291 specific handling. */ 292 293 static void 294 elf32_sparc_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) 295 { 296 elf32_sparc_final_write_processing (abfd, linker); 297 elf_vxworks_final_write_processing (abfd, linker); 298 } 299 300 #undef TARGET_BIG_SYM 301 #define TARGET_BIG_SYM sparc_elf32_vxworks_vec 302 #undef TARGET_BIG_NAME 303 #define TARGET_BIG_NAME "elf32-sparc-vxworks" 304 305 #undef ELF_MINPAGESIZE 306 #define ELF_MINPAGESIZE 0x1000 307 308 #undef bfd_elf32_bfd_link_hash_table_create 309 #define bfd_elf32_bfd_link_hash_table_create \ 310 elf32_sparc_vxworks_link_hash_table_create 311 312 #undef elf_backend_want_got_plt 313 #define elf_backend_want_got_plt 1 314 #undef elf_backend_plt_readonly 315 #define elf_backend_plt_readonly 1 316 #undef elf_backend_got_header_size 317 #define elf_backend_got_header_size 12 318 #undef elf_backend_dtrel_excludes_plt 319 #define elf_backend_dtrel_excludes_plt 1 320 #undef elf_backend_add_symbol_hook 321 #define elf_backend_add_symbol_hook \ 322 elf_vxworks_add_symbol_hook 323 #undef elf_backend_link_output_symbol_hook 324 #define elf_backend_link_output_symbol_hook \ 325 elf_vxworks_link_output_symbol_hook 326 #undef elf_backend_emit_relocs 327 #define elf_backend_emit_relocs \ 328 elf_vxworks_emit_relocs 329 #undef elf_backend_final_write_processing 330 #define elf_backend_final_write_processing \ 331 elf32_sparc_vxworks_final_write_processing 332 #undef elf_backend_static_tls_alignment 333 #undef elf_backend_strtab_flags 334 #undef elf_backend_copy_special_section_fields 335 336 #undef elf32_bed 337 #define elf32_bed sparc_elf_vxworks_bed 338 339 #include "elf32-target.h" 340