1 /* SPARC-specific support for 32-bit ELF 2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 3 2003, 2004, 2005, 2006, 2007, 2010 Free Software Foundation, Inc. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 20 MA 02110-1301, USA. */ 21 22 #include "sysdep.h" 23 #include "bfd.h" 24 #include "bfdlink.h" 25 #include "libbfd.h" 26 #include "elf-bfd.h" 27 #include "elf/sparc.h" 28 #include "opcode/sparc.h" 29 #include "elfxx-sparc.h" 30 #include "elf-vxworks.h" 31 32 /* Support for core dump NOTE sections. */ 33 34 static bfd_boolean 35 elf32_sparc_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 36 { 37 switch (note->descsz) 38 { 39 default: 40 return FALSE; 41 42 case 260: /* Solaris prpsinfo_t. */ 43 elf_tdata (abfd)->core_program 44 = _bfd_elfcore_strndup (abfd, note->descdata + 84, 16); 45 elf_tdata (abfd)->core_command 46 = _bfd_elfcore_strndup (abfd, note->descdata + 100, 80); 47 break; 48 49 case 336: /* Solaris psinfo_t. */ 50 elf_tdata (abfd)->core_program 51 = _bfd_elfcore_strndup (abfd, note->descdata + 88, 16); 52 elf_tdata (abfd)->core_command 53 = _bfd_elfcore_strndup (abfd, note->descdata + 104, 80); 54 break; 55 } 56 57 return TRUE; 58 } 59 60 /* Functions for dealing with the e_flags field. 61 62 We don't define set_private_flags or copy_private_bfd_data because 63 the only currently defined values are based on the bfd mach number, 64 so we use the latter instead and defer setting e_flags until the 65 file is written out. */ 66 67 /* Merge backend specific data from an object file to the output 68 object file when linking. */ 69 70 static bfd_boolean 71 elf32_sparc_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 72 { 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 TRUE; 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 elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS; 141 elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK; 142 elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1 143 | EF_SPARC_SUN_US3; 144 break; 145 case bfd_mach_sparc_sparclite_le : 146 elf_elfheader (abfd)->e_flags |= EF_SPARC_LEDATA; 147 break; 148 default : 149 abort (); 150 break; 151 } 152 } 153 154 static enum elf_reloc_type_class 155 elf32_sparc_reloc_type_class (const Elf_Internal_Rela *rela) 156 { 157 switch ((int) ELF32_R_TYPE (rela->r_info)) 158 { 159 case R_SPARC_RELATIVE: 160 return reloc_class_relative; 161 case R_SPARC_JMP_SLOT: 162 return reloc_class_plt; 163 case R_SPARC_COPY: 164 return reloc_class_copy; 165 default: 166 return reloc_class_normal; 167 } 168 } 169 170 /* Hook called by the linker routine which adds symbols from an object 171 file. */ 172 173 static bfd_boolean 174 elf32_sparc_add_symbol_hook (bfd * abfd, 175 struct bfd_link_info * info ATTRIBUTE_UNUSED, 176 Elf_Internal_Sym * sym, 177 const char ** namep ATTRIBUTE_UNUSED, 178 flagword * flagsp ATTRIBUTE_UNUSED, 179 asection ** secp ATTRIBUTE_UNUSED, 180 bfd_vma * valp ATTRIBUTE_UNUSED) 181 { 182 if ((abfd->flags & DYNAMIC) == 0 183 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC 184 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)) 185 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE; 186 return TRUE; 187 } 188 189 #define TARGET_BIG_SYM bfd_elf32_sparc_vec 190 #define TARGET_BIG_NAME "elf32-sparc" 191 #define ELF_ARCH bfd_arch_sparc 192 #define ELF_TARGET_ID SPARC_ELF_DATA 193 #define ELF_MACHINE_CODE EM_SPARC 194 #define ELF_MACHINE_ALT1 EM_SPARC32PLUS 195 #define ELF_MAXPAGESIZE 0x10000 196 #define ELF_COMMONPAGESIZE 0x2000 197 198 #define bfd_elf32_bfd_merge_private_bfd_data \ 199 elf32_sparc_merge_private_bfd_data 200 #define elf_backend_final_write_processing \ 201 elf32_sparc_final_write_processing 202 #define elf_backend_grok_psinfo elf32_sparc_grok_psinfo 203 #define elf_backend_reloc_type_class elf32_sparc_reloc_type_class 204 205 #define elf_info_to_howto _bfd_sparc_elf_info_to_howto 206 #define bfd_elf32_bfd_reloc_type_lookup _bfd_sparc_elf_reloc_type_lookup 207 #define bfd_elf32_bfd_reloc_name_lookup \ 208 _bfd_sparc_elf_reloc_name_lookup 209 #define bfd_elf32_bfd_link_hash_table_create \ 210 _bfd_sparc_elf_link_hash_table_create 211 #define bfd_elf32_bfd_link_hash_table_free \ 212 _bfd_sparc_elf_link_hash_table_free 213 #define bfd_elf32_bfd_relax_section _bfd_sparc_elf_relax_section 214 #define bfd_elf32_new_section_hook _bfd_sparc_elf_new_section_hook 215 #define elf_backend_copy_indirect_symbol \ 216 _bfd_sparc_elf_copy_indirect_symbol 217 #define elf_backend_create_dynamic_sections \ 218 _bfd_sparc_elf_create_dynamic_sections 219 #define elf_backend_check_relocs _bfd_sparc_elf_check_relocs 220 #define elf_backend_adjust_dynamic_symbol \ 221 _bfd_sparc_elf_adjust_dynamic_symbol 222 #define elf_backend_omit_section_dynsym _bfd_sparc_elf_omit_section_dynsym 223 #define elf_backend_size_dynamic_sections \ 224 _bfd_sparc_elf_size_dynamic_sections 225 #define elf_backend_relocate_section _bfd_sparc_elf_relocate_section 226 #define elf_backend_finish_dynamic_symbol \ 227 _bfd_sparc_elf_finish_dynamic_symbol 228 #define elf_backend_finish_dynamic_sections \ 229 _bfd_sparc_elf_finish_dynamic_sections 230 #define bfd_elf32_mkobject _bfd_sparc_elf_mkobject 231 #define elf_backend_object_p _bfd_sparc_elf_object_p 232 #define elf_backend_gc_mark_hook _bfd_sparc_elf_gc_mark_hook 233 #define elf_backend_gc_sweep_hook _bfd_sparc_elf_gc_sweep_hook 234 #define elf_backend_plt_sym_val _bfd_sparc_elf_plt_sym_val 235 #define elf_backend_init_index_section _bfd_elf_init_1_index_section 236 237 #define elf_backend_can_gc_sections 1 238 #define elf_backend_can_refcount 1 239 #define elf_backend_want_got_plt 0 240 #define elf_backend_plt_readonly 0 241 #define elf_backend_want_plt_sym 1 242 #define elf_backend_got_header_size 4 243 #define elf_backend_rela_normal 1 244 245 #define elf_backend_post_process_headers _bfd_elf_set_osabi 246 #define elf_backend_add_symbol_hook elf32_sparc_add_symbol_hook 247 248 #include "elf32-target.h" 249 250 /* Solaris 2. */ 251 252 #undef TARGET_BIG_SYM 253 #define TARGET_BIG_SYM bfd_elf32_sparc_sol2_vec 254 #undef TARGET_BIG_NAME 255 #define TARGET_BIG_NAME "elf32-sparc-sol2" 256 257 #undef elf32_bed 258 #define elf32_bed elf32_sparc_sol2_bed 259 260 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte 261 boundary. */ 262 #undef elf_backend_static_tls_alignment 263 #define elf_backend_static_tls_alignment 8 264 265 #include "elf32-target.h" 266 267 /* A wrapper around _bfd_sparc_elf_link_hash_table_create that identifies 268 the target system as VxWorks. */ 269 270 static struct bfd_link_hash_table * 271 elf32_sparc_vxworks_link_hash_table_create (bfd *abfd) 272 { 273 struct bfd_link_hash_table *ret; 274 275 ret = _bfd_sparc_elf_link_hash_table_create (abfd); 276 if (ret) 277 { 278 struct _bfd_sparc_elf_link_hash_table *htab; 279 280 htab = (struct _bfd_sparc_elf_link_hash_table *) ret; 281 htab->is_vxworks = 1; 282 } 283 return ret; 284 } 285 286 /* A final_write_processing hook that does both the SPARC- and VxWorks- 287 specific handling. */ 288 289 static void 290 elf32_sparc_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) 291 { 292 elf32_sparc_final_write_processing (abfd, linker); 293 elf_vxworks_final_write_processing (abfd, linker); 294 } 295 296 #undef TARGET_BIG_SYM 297 #define TARGET_BIG_SYM bfd_elf32_sparc_vxworks_vec 298 #undef TARGET_BIG_NAME 299 #define TARGET_BIG_NAME "elf32-sparc-vxworks" 300 301 #undef ELF_MINPAGESIZE 302 #define ELF_MINPAGESIZE 0x1000 303 304 #undef bfd_elf32_bfd_link_hash_table_create 305 #define bfd_elf32_bfd_link_hash_table_create \ 306 elf32_sparc_vxworks_link_hash_table_create 307 308 #undef elf_backend_want_got_plt 309 #define elf_backend_want_got_plt 1 310 #undef elf_backend_plt_readonly 311 #define elf_backend_plt_readonly 1 312 #undef elf_backend_got_header_size 313 #define elf_backend_got_header_size 12 314 #undef elf_backend_add_symbol_hook 315 #define elf_backend_add_symbol_hook \ 316 elf_vxworks_add_symbol_hook 317 #undef elf_backend_link_output_symbol_hook 318 #define elf_backend_link_output_symbol_hook \ 319 elf_vxworks_link_output_symbol_hook 320 #undef elf_backend_emit_relocs 321 #define elf_backend_emit_relocs \ 322 elf_vxworks_emit_relocs 323 #undef elf_backend_final_write_processing 324 #define elf_backend_final_write_processing \ 325 elf32_sparc_vxworks_final_write_processing 326 #undef elf_backend_static_tls_alignment 327 328 #undef elf32_bed 329 #define elf32_bed sparc_elf_vxworks_bed 330 331 #include "elf32-target.h" 332