| 1 | /* MIPS-specific support for 32-bit ELF |
| 2 | Copyright 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc. |
| 3 | |
| 4 | Most of the information added by Ian Lance Taylor, Cygnus Support, |
| 5 | <ian@cygnus.com>. |
| 6 | |
| 7 | This file is part of BFD, the Binary File Descriptor library. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 2 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the Free Software |
| 21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 22 | |
| 23 | /* This file handles MIPS ELF targets. SGI Irix 5 uses a slightly |
| 24 | different MIPS ELF from other targets. This matters when linking. |
| 25 | This file supports both, switching at runtime. */ |
| 26 | |
| 27 | #include "bfd.h" |
| 28 | #include "sysdep.h" |
| 29 | #include "libbfd.h" |
| 30 | #include "bfdlink.h" |
| 31 | #include "genlink.h" |
| 32 | #include "elf-bfd.h" |
| 33 | #include "elf/mips.h" |
| 34 | |
| 35 | /* Get the ECOFF swapping routines. */ |
| 36 | #include "coff/sym.h" |
| 37 | #include "coff/symconst.h" |
| 38 | #include "coff/internal.h" |
| 39 | #include "coff/ecoff.h" |
| 40 | #include "coff/mips.h" |
| 41 | #define ECOFF_32 |
| 42 | #include "ecoffswap.h" |
| 43 | |
| 44 | static bfd_reloc_status_type mips32_64bit_reloc |
| 45 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 46 | static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup |
| 47 | PARAMS ((bfd *, bfd_reloc_code_real_type)); |
| 48 | static void mips_info_to_howto_rel |
| 49 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); |
| 50 | static void bfd_mips_elf32_swap_gptab_in |
| 51 | PARAMS ((bfd *, const Elf32_External_gptab *, Elf32_gptab *)); |
| 52 | static void bfd_mips_elf32_swap_gptab_out |
| 53 | PARAMS ((bfd *, const Elf32_gptab *, Elf32_External_gptab *)); |
| 54 | static boolean mips_elf_sym_is_global PARAMS ((bfd *, asymbol *)); |
| 55 | static boolean mips_elf32_object_p PARAMS ((bfd *)); |
| 56 | static boolean mips_elf_create_procedure_table |
| 57 | PARAMS ((PTR, bfd *, struct bfd_link_info *, asection *, |
| 58 | struct ecoff_debug_info *)); |
| 59 | static int mips_elf_additional_program_headers PARAMS ((bfd *)); |
| 60 | static boolean mips_elf_modify_segment_map PARAMS ((bfd *)); |
| 61 | static INLINE int elf_mips_isa PARAMS ((flagword)); |
| 62 | static boolean mips_elf32_section_from_shdr |
| 63 | PARAMS ((bfd *, Elf32_Internal_Shdr *, char *)); |
| 64 | static boolean mips_elf32_section_processing |
| 65 | PARAMS ((bfd *, Elf32_Internal_Shdr *)); |
| 66 | static boolean mips_elf_is_local_label_name |
| 67 | PARAMS ((bfd *, const char *)); |
| 68 | static struct bfd_hash_entry *mips_elf_link_hash_newfunc |
| 69 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| 70 | static struct bfd_link_hash_table *mips_elf_link_hash_table_create |
| 71 | PARAMS ((bfd *)); |
| 72 | static int gptab_compare PARAMS ((const void *, const void *)); |
| 73 | static boolean mips_elf_final_link |
| 74 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 75 | static void mips_elf_relocate_hi16 |
| 76 | PARAMS ((bfd *, Elf_Internal_Rela *, Elf_Internal_Rela *, bfd_byte *, |
| 77 | bfd_vma)); |
| 78 | static boolean mips_elf_relocate_got_local |
| 79 | PARAMS ((bfd *, bfd *, asection *, Elf_Internal_Rela *, |
| 80 | Elf_Internal_Rela *, bfd_byte *, bfd_vma)); |
| 81 | static void mips_elf_relocate_global_got |
| 82 | PARAMS ((bfd *, Elf_Internal_Rela *, bfd_byte *, bfd_vma)); |
| 83 | static bfd_reloc_status_type mips16_jump_reloc |
| 84 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 85 | static bfd_reloc_status_type mips16_gprel_reloc |
| 86 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 87 | static boolean mips_elf_adjust_dynindx |
| 88 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
| 89 | static boolean mips_elf_relocate_section |
| 90 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| 91 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
| 92 | static boolean mips_elf_link_output_symbol_hook |
| 93 | PARAMS ((bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *, |
| 94 | asection *)); |
| 95 | static boolean mips_elf_create_dynamic_sections |
| 96 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 97 | static boolean mips_elf_create_compact_rel_section |
| 98 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 99 | static boolean mips_elf_create_got_section |
| 100 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 101 | static boolean mips_elf_check_relocs |
| 102 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| 103 | const Elf_Internal_Rela *)); |
| 104 | static boolean mips_elf_adjust_dynamic_symbol |
| 105 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
| 106 | static boolean mips_elf_always_size_sections |
| 107 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 108 | static boolean mips_elf_size_dynamic_sections |
| 109 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 110 | static boolean mips_elf_finish_dynamic_symbol |
| 111 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
| 112 | Elf_Internal_Sym *)); |
| 113 | static boolean mips_elf_finish_dynamic_sections |
| 114 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 115 | static boolean mips_elf_add_symbol_hook |
| 116 | PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, |
| 117 | const char **, flagword *, asection **, bfd_vma *)); |
| 118 | static bfd_reloc_status_type mips_elf_final_gp |
| 119 | PARAMS ((bfd *, asymbol *, boolean, char **, bfd_vma *)); |
| 120 | static bfd_byte *elf32_mips_get_relocated_section_contents |
| 121 | PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, |
| 122 | bfd_byte *, boolean, asymbol **)); |
| 123 | |
| 124 | /* This is true for Irix 5 executables, false for normal MIPS ELF ABI |
| 125 | executables. FIXME: At the moment, we default to always generating |
| 126 | Irix 5 executables. */ |
| 127 | |
| 128 | #define SGI_COMPAT(abfd) (1) |
| 129 | |
| 130 | /* This structure is used to hold .got information when linking. It |
| 131 | is stored in the tdata field of the bfd_elf_section_data structure. */ |
| 132 | |
| 133 | struct mips_got_info |
| 134 | { |
| 135 | /* The symbol index of the first global .got symbol. */ |
| 136 | unsigned long global_gotsym; |
| 137 | /* The number of local .got entries. */ |
| 138 | unsigned int local_gotno; |
| 139 | /* The number of local .got entries we have used. */ |
| 140 | unsigned int assigned_gotno; |
| 141 | }; |
| 142 | |
| 143 | /* The number of local .got entries we reserve. */ |
| 144 | #define MIPS_RESERVED_GOTNO (2) |
| 145 | |
| 146 | /* Instructions which appear in a stub. For some reason the stub is |
| 147 | slightly different on an SGI system. */ |
| 148 | #define ELF_MIPS_GP_OFFSET(abfd) (SGI_COMPAT (abfd) ? 0x7ff0 : 0x8000) |
| 149 | #define STUB_LW(abfd) \ |
| 150 | (SGI_COMPAT (abfd) \ |
| 151 | ? 0x8f998010 /* lw t9,0x8010(gp) */ \ |
| 152 | : 0x8f998000) /* lw t9,0x8000(gp) */ |
| 153 | #define STUB_MOVE 0x03e07825 /* move t7,ra */ |
| 154 | #define STUB_JALR 0x0320f809 /* jal t9 */ |
| 155 | #define STUB_LI16 0x34180000 /* ori t8,zero,0 */ |
| 156 | #define MIPS_FUNCTION_STUB_SIZE (16) |
| 157 | |
| 158 | /* Names of sections which appear in the .dynsym section in an Irix 5 |
| 159 | executable. */ |
| 160 | |
| 161 | static const char * const mips_elf_dynsym_sec_names[] = |
| 162 | { |
| 163 | ".text", |
| 164 | ".init", |
| 165 | ".fini", |
| 166 | ".data", |
| 167 | ".rodata", |
| 168 | ".sdata", |
| 169 | ".sbss", |
| 170 | ".bss", |
| 171 | NULL |
| 172 | }; |
| 173 | |
| 174 | #define SIZEOF_MIPS_DYNSYM_SECNAMES \ |
| 175 | (sizeof mips_elf_dynsym_sec_names / sizeof mips_elf_dynsym_sec_names[0]) |
| 176 | |
| 177 | /* The number of entries in mips_elf_dynsym_sec_names which go in the |
| 178 | text segment. */ |
| 179 | |
| 180 | #define MIPS_TEXT_DYNSYM_SECNO (3) |
| 181 | |
| 182 | /* The names of the runtime procedure table symbols used on Irix 5. */ |
| 183 | |
| 184 | static const char * const mips_elf_dynsym_rtproc_names[] = |
| 185 | { |
| 186 | "_procedure_table", |
| 187 | "_procedure_string_table", |
| 188 | "_procedure_table_size", |
| 189 | NULL |
| 190 | }; |
| 191 | |
| 192 | /* These structures are used to generate the .compact_rel section on |
| 193 | Irix 5. */ |
| 194 | |
| 195 | typedef struct |
| 196 | { |
| 197 | unsigned long id1; /* Always one? */ |
| 198 | unsigned long num; /* Number of compact relocation entries. */ |
| 199 | unsigned long id2; /* Always two? */ |
| 200 | unsigned long offset; /* The file offset of the first relocation. */ |
| 201 | unsigned long reserved0; /* Zero? */ |
| 202 | unsigned long reserved1; /* Zero? */ |
| 203 | } Elf32_compact_rel; |
| 204 | |
| 205 | typedef struct |
| 206 | { |
| 207 | bfd_byte id1[4]; |
| 208 | bfd_byte num[4]; |
| 209 | bfd_byte id2[4]; |
| 210 | bfd_byte offset[4]; |
| 211 | bfd_byte reserved0[4]; |
| 212 | bfd_byte reserved1[4]; |
| 213 | } Elf32_External_compact_rel; |
| 214 | |
| 215 | typedef struct |
| 216 | { |
| 217 | unsigned int ctype : 1; /* 1: long 0: short format. See below. */ |
| 218 | unsigned int rtype : 4; /* Relocation types. See below. */ |
| 219 | unsigned int dist2to : 8; |
| 220 | unsigned int relvaddr : 19; /* (VADDR - vaddr of the previous entry)/ 4 */ |
| 221 | unsigned long konst; /* KONST field. See below. */ |
| 222 | unsigned long vaddr; /* VADDR to be relocated. */ |
| 223 | } Elf32_crinfo; |
| 224 | |
| 225 | typedef struct |
| 226 | { |
| 227 | unsigned int ctype : 1; /* 1: long 0: short format. See below. */ |
| 228 | unsigned int rtype : 4; /* Relocation types. See below. */ |
| 229 | unsigned int dist2to : 8; |
| 230 | unsigned int relvaddr : 19; /* (VADDR - vaddr of the previous entry)/ 4 */ |
| 231 | unsigned long konst; /* KONST field. See below. */ |
| 232 | } Elf32_crinfo2; |
| 233 | |
| 234 | typedef struct |
| 235 | { |
| 236 | bfd_byte info[4]; |
| 237 | bfd_byte konst[4]; |
| 238 | bfd_byte vaddr[4]; |
| 239 | } Elf32_External_crinfo; |
| 240 | |
| 241 | typedef struct |
| 242 | { |
| 243 | bfd_byte info[4]; |
| 244 | bfd_byte konst[4]; |
| 245 | } Elf32_External_crinfo2; |
| 246 | |
| 247 | /* These are the constants used to swap the bitfields in a crinfo. */ |
| 248 | |
| 249 | #define CRINFO_CTYPE (0x1) |
| 250 | #define CRINFO_CTYPE_SH (31) |
| 251 | #define CRINFO_RTYPE (0xf) |
| 252 | #define CRINFO_RTYPE_SH (27) |
| 253 | #define CRINFO_DIST2TO (0xff) |
| 254 | #define CRINFO_DIST2TO_SH (19) |
| 255 | #define CRINFO_RELVADDR (0x7ffff) |
| 256 | #define CRINFO_RELVADDR_SH (0) |
| 257 | |
| 258 | /* A compact relocation info has long (3 words) or short (2 words) |
| 259 | formats. A short format doesn't have VADDR field and relvaddr |
| 260 | fields contains ((VADDR - vaddr of the previous entry) >> 2). */ |
| 261 | #define CRF_MIPS_LONG 1 |
| 262 | #define CRF_MIPS_SHORT 0 |
| 263 | |
| 264 | /* There are 4 types of compact relocation at least. The value KONST |
| 265 | has different meaning for each type: |
| 266 | |
| 267 | (type) (konst) |
| 268 | CT_MIPS_REL32 Address in data |
| 269 | CT_MIPS_WORD Address in word (XXX) |
| 270 | CT_MIPS_GPHI_LO GP - vaddr |
| 271 | CT_MIPS_JMPAD Address to jump |
| 272 | */ |
| 273 | |
| 274 | #define CRT_MIPS_REL32 0xa |
| 275 | #define CRT_MIPS_WORD 0xb |
| 276 | #define CRT_MIPS_GPHI_LO 0xc |
| 277 | #define CRT_MIPS_JMPAD 0xd |
| 278 | |
| 279 | #define mips_elf_set_cr_format(x,format) ((x).ctype = (format)) |
| 280 | #define mips_elf_set_cr_type(x,type) ((x).rtype = (type)) |
| 281 | #define mips_elf_set_cr_dist2to(x,v) ((x).dist2to = (v)) |
| 282 | #define mips_elf_set_cr_relvaddr(x,d) ((x).relvaddr = (d)<<2) |
| 283 | |
| 284 | static void bfd_elf32_swap_compact_rel_out |
| 285 | PARAMS ((bfd *, const Elf32_compact_rel *, Elf32_External_compact_rel *)); |
| 286 | static void bfd_elf32_swap_crinfo_out |
| 287 | PARAMS ((bfd *, const Elf32_crinfo *, Elf32_External_crinfo *)); |
| 288 | |
| 289 | #define USE_REL 1 /* MIPS uses REL relocations instead of RELA */ |
| 290 | |
| 291 | enum reloc_type |
| 292 | { |
| 293 | R_MIPS_NONE = 0, |
| 294 | R_MIPS_16, R_MIPS_32, |
| 295 | R_MIPS_REL32, R_MIPS_26, |
| 296 | R_MIPS_HI16, R_MIPS_LO16, |
| 297 | R_MIPS_GPREL16, R_MIPS_LITERAL, |
| 298 | R_MIPS_GOT16, R_MIPS_PC16, |
| 299 | R_MIPS_CALL16, R_MIPS_GPREL32, |
| 300 | /* The remaining relocs are defined on Irix, although they are not |
| 301 | in the MIPS ELF ABI. */ |
| 302 | R_MIPS_UNUSED1, R_MIPS_UNUSED2, |
| 303 | R_MIPS_UNUSED3, |
| 304 | R_MIPS_SHIFT5, R_MIPS_SHIFT6, |
| 305 | R_MIPS_64, R_MIPS_GOT_DISP, |
| 306 | R_MIPS_GOT_PAGE, R_MIPS_GOT_OFST, |
| 307 | R_MIPS_GOT_HI16, R_MIPS_GOT_LO16, |
| 308 | R_MIPS_SUB, R_MIPS_INSERT_A, |
| 309 | R_MIPS_INSERT_B, R_MIPS_DELETE, |
| 310 | R_MIPS_HIGHER, R_MIPS_HIGHEST, |
| 311 | R_MIPS_CALL_HI16, R_MIPS_CALL_LO16, |
| 312 | R_MIPS_max, |
| 313 | /* These relocs are used for the mips16. */ |
| 314 | R_MIPS16_26 = 100, |
| 315 | R_MIPS16_GPREL = 101 |
| 316 | /* start-sanitize-sky */ |
| 317 | /* These relocs are for the dvp. */ |
| 318 | , R_MIPS_DVP_11_PCREL = 120 |
| 319 | /* end-sanitize-sky */ |
| 320 | }; |
| 321 | |
| 322 | static reloc_howto_type elf_mips_howto_table[] = |
| 323 | { |
| 324 | /* No relocation. */ |
| 325 | HOWTO (R_MIPS_NONE, /* type */ |
| 326 | 0, /* rightshift */ |
| 327 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 328 | 0, /* bitsize */ |
| 329 | false, /* pc_relative */ |
| 330 | 0, /* bitpos */ |
| 331 | complain_overflow_dont, /* complain_on_overflow */ |
| 332 | bfd_elf_generic_reloc, /* special_function */ |
| 333 | "R_MIPS_NONE", /* name */ |
| 334 | false, /* partial_inplace */ |
| 335 | 0, /* src_mask */ |
| 336 | 0, /* dst_mask */ |
| 337 | false), /* pcrel_offset */ |
| 338 | |
| 339 | /* 16 bit relocation. */ |
| 340 | HOWTO (R_MIPS_16, /* type */ |
| 341 | 0, /* rightshift */ |
| 342 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 343 | 16, /* bitsize */ |
| 344 | false, /* pc_relative */ |
| 345 | 0, /* bitpos */ |
| 346 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 347 | bfd_elf_generic_reloc, /* special_function */ |
| 348 | "R_MIPS_16", /* name */ |
| 349 | true, /* partial_inplace */ |
| 350 | 0xffff, /* src_mask */ |
| 351 | 0xffff, /* dst_mask */ |
| 352 | false), /* pcrel_offset */ |
| 353 | |
| 354 | /* 32 bit relocation. */ |
| 355 | HOWTO (R_MIPS_32, /* type */ |
| 356 | 0, /* rightshift */ |
| 357 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 358 | 32, /* bitsize */ |
| 359 | false, /* pc_relative */ |
| 360 | 0, /* bitpos */ |
| 361 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 362 | bfd_elf_generic_reloc, /* special_function */ |
| 363 | "R_MIPS_32", /* name */ |
| 364 | true, /* partial_inplace */ |
| 365 | 0xffffffff, /* src_mask */ |
| 366 | 0xffffffff, /* dst_mask */ |
| 367 | false), /* pcrel_offset */ |
| 368 | |
| 369 | /* 32 bit symbol relative relocation. */ |
| 370 | HOWTO (R_MIPS_REL32, /* type */ |
| 371 | 0, /* rightshift */ |
| 372 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 373 | 32, /* bitsize */ |
| 374 | false, /* pc_relative */ |
| 375 | 0, /* bitpos */ |
| 376 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 377 | bfd_elf_generic_reloc, /* special_function */ |
| 378 | "R_MIPS_REL32", /* name */ |
| 379 | true, /* partial_inplace */ |
| 380 | 0xffffffff, /* src_mask */ |
| 381 | 0xffffffff, /* dst_mask */ |
| 382 | false), /* pcrel_offset */ |
| 383 | |
| 384 | /* 26 bit branch address. */ |
| 385 | HOWTO (R_MIPS_26, /* type */ |
| 386 | 2, /* rightshift */ |
| 387 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 388 | 26, /* bitsize */ |
| 389 | false, /* pc_relative */ |
| 390 | 0, /* bitpos */ |
| 391 | complain_overflow_dont, /* complain_on_overflow */ |
| 392 | /* This needs complex overflow |
| 393 | detection, because the upper four |
| 394 | bits must match the PC. */ |
| 395 | bfd_elf_generic_reloc, /* special_function */ |
| 396 | "R_MIPS_26", /* name */ |
| 397 | true, /* partial_inplace */ |
| 398 | 0x3ffffff, /* src_mask */ |
| 399 | 0x3ffffff, /* dst_mask */ |
| 400 | false), /* pcrel_offset */ |
| 401 | |
| 402 | /* High 16 bits of symbol value. */ |
| 403 | HOWTO (R_MIPS_HI16, /* type */ |
| 404 | 0, /* rightshift */ |
| 405 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 406 | 16, /* bitsize */ |
| 407 | false, /* pc_relative */ |
| 408 | 0, /* bitpos */ |
| 409 | complain_overflow_dont, /* complain_on_overflow */ |
| 410 | _bfd_mips_elf_hi16_reloc, /* special_function */ |
| 411 | "R_MIPS_HI16", /* name */ |
| 412 | true, /* partial_inplace */ |
| 413 | 0xffff, /* src_mask */ |
| 414 | 0xffff, /* dst_mask */ |
| 415 | false), /* pcrel_offset */ |
| 416 | |
| 417 | /* Low 16 bits of symbol value. */ |
| 418 | HOWTO (R_MIPS_LO16, /* type */ |
| 419 | 0, /* rightshift */ |
| 420 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 421 | 16, /* bitsize */ |
| 422 | false, /* pc_relative */ |
| 423 | 0, /* bitpos */ |
| 424 | complain_overflow_dont, /* complain_on_overflow */ |
| 425 | _bfd_mips_elf_lo16_reloc, /* special_function */ |
| 426 | "R_MIPS_LO16", /* name */ |
| 427 | true, /* partial_inplace */ |
| 428 | 0xffff, /* src_mask */ |
| 429 | 0xffff, /* dst_mask */ |
| 430 | false), /* pcrel_offset */ |
| 431 | |
| 432 | /* GP relative reference. */ |
| 433 | HOWTO (R_MIPS_GPREL16, /* type */ |
| 434 | 0, /* rightshift */ |
| 435 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 436 | 16, /* bitsize */ |
| 437 | false, /* pc_relative */ |
| 438 | 0, /* bitpos */ |
| 439 | complain_overflow_signed, /* complain_on_overflow */ |
| 440 | _bfd_mips_elf_gprel16_reloc, /* special_function */ |
| 441 | "R_MIPS_GPREL16", /* name */ |
| 442 | true, /* partial_inplace */ |
| 443 | 0xffff, /* src_mask */ |
| 444 | 0xffff, /* dst_mask */ |
| 445 | false), /* pcrel_offset */ |
| 446 | |
| 447 | /* Reference to literal section. */ |
| 448 | HOWTO (R_MIPS_LITERAL, /* type */ |
| 449 | 0, /* rightshift */ |
| 450 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 451 | 16, /* bitsize */ |
| 452 | false, /* pc_relative */ |
| 453 | 0, /* bitpos */ |
| 454 | complain_overflow_signed, /* complain_on_overflow */ |
| 455 | _bfd_mips_elf_gprel16_reloc, /* special_function */ |
| 456 | "R_MIPS_LITERAL", /* name */ |
| 457 | true, /* partial_inplace */ |
| 458 | 0xffff, /* src_mask */ |
| 459 | 0xffff, /* dst_mask */ |
| 460 | false), /* pcrel_offset */ |
| 461 | |
| 462 | /* Reference to global offset table. */ |
| 463 | HOWTO (R_MIPS_GOT16, /* type */ |
| 464 | 0, /* rightshift */ |
| 465 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 466 | 16, /* bitsize */ |
| 467 | false, /* pc_relative */ |
| 468 | 0, /* bitpos */ |
| 469 | complain_overflow_signed, /* complain_on_overflow */ |
| 470 | _bfd_mips_elf_got16_reloc, /* special_function */ |
| 471 | "R_MIPS_GOT16", /* name */ |
| 472 | false, /* partial_inplace */ |
| 473 | 0, /* src_mask */ |
| 474 | 0xffff, /* dst_mask */ |
| 475 | false), /* pcrel_offset */ |
| 476 | |
| 477 | /* 16 bit PC relative reference. */ |
| 478 | HOWTO (R_MIPS_PC16, /* type */ |
| 479 | 0, /* rightshift */ |
| 480 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 481 | 16, /* bitsize */ |
| 482 | true, /* pc_relative */ |
| 483 | 0, /* bitpos */ |
| 484 | complain_overflow_signed, /* complain_on_overflow */ |
| 485 | bfd_elf_generic_reloc, /* special_function */ |
| 486 | "R_MIPS_PC16", /* name */ |
| 487 | true, /* partial_inplace */ |
| 488 | 0xffff, /* src_mask */ |
| 489 | 0xffff, /* dst_mask */ |
| 490 | false), /* pcrel_offset */ |
| 491 | |
| 492 | /* 16 bit call through global offset table. */ |
| 493 | /* FIXME: This is not handled correctly. */ |
| 494 | HOWTO (R_MIPS_CALL16, /* type */ |
| 495 | 0, /* rightshift */ |
| 496 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 497 | 16, /* bitsize */ |
| 498 | false, /* pc_relative */ |
| 499 | 0, /* bitpos */ |
| 500 | complain_overflow_signed, /* complain_on_overflow */ |
| 501 | bfd_elf_generic_reloc, /* special_function */ |
| 502 | "R_MIPS_CALL16", /* name */ |
| 503 | false, /* partial_inplace */ |
| 504 | 0, /* src_mask */ |
| 505 | 0xffff, /* dst_mask */ |
| 506 | false), /* pcrel_offset */ |
| 507 | |
| 508 | /* 32 bit GP relative reference. */ |
| 509 | HOWTO (R_MIPS_GPREL32, /* type */ |
| 510 | 0, /* rightshift */ |
| 511 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 512 | 32, /* bitsize */ |
| 513 | false, /* pc_relative */ |
| 514 | 0, /* bitpos */ |
| 515 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 516 | _bfd_mips_elf_gprel32_reloc, /* special_function */ |
| 517 | "R_MIPS_GPREL32", /* name */ |
| 518 | true, /* partial_inplace */ |
| 519 | 0xffffffff, /* src_mask */ |
| 520 | 0xffffffff, /* dst_mask */ |
| 521 | false), /* pcrel_offset */ |
| 522 | |
| 523 | /* The remaining relocs are defined on Irix 5, although they are |
| 524 | not defined by the ABI. */ |
| 525 | { 13 }, |
| 526 | { 14 }, |
| 527 | { 15 }, |
| 528 | |
| 529 | /* A 5 bit shift field. */ |
| 530 | HOWTO (R_MIPS_SHIFT5, /* type */ |
| 531 | 0, /* rightshift */ |
| 532 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 533 | 5, /* bitsize */ |
| 534 | false, /* pc_relative */ |
| 535 | 6, /* bitpos */ |
| 536 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 537 | bfd_elf_generic_reloc, /* special_function */ |
| 538 | "R_MIPS_SHIFT5", /* name */ |
| 539 | true, /* partial_inplace */ |
| 540 | 0x000007c0, /* src_mask */ |
| 541 | 0x000007c0, /* dst_mask */ |
| 542 | false), /* pcrel_offset */ |
| 543 | |
| 544 | /* A 6 bit shift field. */ |
| 545 | /* FIXME: This is not handled correctly; a special function is |
| 546 | needed to put the most significant bit in the right place. */ |
| 547 | HOWTO (R_MIPS_SHIFT6, /* type */ |
| 548 | 0, /* rightshift */ |
| 549 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 550 | 6, /* bitsize */ |
| 551 | false, /* pc_relative */ |
| 552 | 6, /* bitpos */ |
| 553 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 554 | bfd_elf_generic_reloc, /* special_function */ |
| 555 | "R_MIPS_SHIFT6", /* name */ |
| 556 | true, /* partial_inplace */ |
| 557 | 0x000007c4, /* src_mask */ |
| 558 | 0x000007c4, /* dst_mask */ |
| 559 | false), /* pcrel_offset */ |
| 560 | |
| 561 | /* A 64 bit relocation. This is used in 32 bit ELF when addresses |
| 562 | are 64 bits long; the upper 32 bits are simply a sign extension. |
| 563 | The fields of the howto should be the same as for R_MIPS_32, |
| 564 | other than the type, name, and special_function. */ |
| 565 | HOWTO (R_MIPS_64, /* type */ |
| 566 | 0, /* rightshift */ |
| 567 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 568 | 32, /* bitsize */ |
| 569 | false, /* pc_relative */ |
| 570 | 0, /* bitpos */ |
| 571 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 572 | mips32_64bit_reloc, /* special_function */ |
| 573 | "R_MIPS_64", /* name */ |
| 574 | true, /* partial_inplace */ |
| 575 | 0xffffffff, /* src_mask */ |
| 576 | 0xffffffff, /* dst_mask */ |
| 577 | false), /* pcrel_offset */ |
| 578 | |
| 579 | /* Displacement in the global offset table. */ |
| 580 | /* FIXME: Not handled correctly. */ |
| 581 | HOWTO (R_MIPS_GOT_DISP, /* type */ |
| 582 | 0, /* rightshift */ |
| 583 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 584 | 16, /* bitsize */ |
| 585 | false, /* pc_relative */ |
| 586 | 0, /* bitpos */ |
| 587 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 588 | bfd_elf_generic_reloc, /* special_function */ |
| 589 | "R_MIPS_GOT_DISP", /* name */ |
| 590 | true, /* partial_inplace */ |
| 591 | 0x0000ffff, /* src_mask */ |
| 592 | 0x0000ffff, /* dst_mask */ |
| 593 | false), /* pcrel_offset */ |
| 594 | |
| 595 | /* Displacement to page pointer in the global offset table. */ |
| 596 | /* FIXME: Not handled correctly. */ |
| 597 | HOWTO (R_MIPS_GOT_PAGE, /* type */ |
| 598 | 0, /* rightshift */ |
| 599 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 600 | 16, /* bitsize */ |
| 601 | false, /* pc_relative */ |
| 602 | 0, /* bitpos */ |
| 603 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 604 | bfd_elf_generic_reloc, /* special_function */ |
| 605 | "R_MIPS_GOT_PAGE", /* name */ |
| 606 | true, /* partial_inplace */ |
| 607 | 0x0000ffff, /* src_mask */ |
| 608 | 0x0000ffff, /* dst_mask */ |
| 609 | false), /* pcrel_offset */ |
| 610 | |
| 611 | /* Offset from page pointer in the global offset table. */ |
| 612 | /* FIXME: Not handled correctly. */ |
| 613 | HOWTO (R_MIPS_GOT_OFST, /* type */ |
| 614 | 0, /* rightshift */ |
| 615 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 616 | 16, /* bitsize */ |
| 617 | false, /* pc_relative */ |
| 618 | 0, /* bitpos */ |
| 619 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 620 | bfd_elf_generic_reloc, /* special_function */ |
| 621 | "R_MIPS_GOT_OFST", /* name */ |
| 622 | true, /* partial_inplace */ |
| 623 | 0x0000ffff, /* src_mask */ |
| 624 | 0x0000ffff, /* dst_mask */ |
| 625 | false), /* pcrel_offset */ |
| 626 | |
| 627 | /* High 16 bits of displacement in global offset table. */ |
| 628 | /* FIXME: Not handled correctly. */ |
| 629 | HOWTO (R_MIPS_GOT_HI16, /* type */ |
| 630 | 0, /* rightshift */ |
| 631 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 632 | 16, /* bitsize */ |
| 633 | false, /* pc_relative */ |
| 634 | 0, /* bitpos */ |
| 635 | complain_overflow_dont, /* complain_on_overflow */ |
| 636 | bfd_elf_generic_reloc, /* special_function */ |
| 637 | "R_MIPS_GOT_HI16", /* name */ |
| 638 | true, /* partial_inplace */ |
| 639 | 0x0000ffff, /* src_mask */ |
| 640 | 0x0000ffff, /* dst_mask */ |
| 641 | false), /* pcrel_offset */ |
| 642 | |
| 643 | /* Low 16 bits of displacement in global offset table. */ |
| 644 | /* FIXME: Not handled correctly. */ |
| 645 | HOWTO (R_MIPS_GOT_LO16, /* type */ |
| 646 | 0, /* rightshift */ |
| 647 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 648 | 16, /* bitsize */ |
| 649 | false, /* pc_relative */ |
| 650 | 0, /* bitpos */ |
| 651 | complain_overflow_dont, /* complain_on_overflow */ |
| 652 | bfd_elf_generic_reloc, /* special_function */ |
| 653 | "R_MIPS_GOT_LO16", /* name */ |
| 654 | true, /* partial_inplace */ |
| 655 | 0x0000ffff, /* src_mask */ |
| 656 | 0x0000ffff, /* dst_mask */ |
| 657 | false), /* pcrel_offset */ |
| 658 | |
| 659 | /* 64 bit subtraction. Presumably not used in 32 bit ELF. */ |
| 660 | { R_MIPS_SUB }, |
| 661 | |
| 662 | /* Used to cause the linker to insert and delete instructions? */ |
| 663 | { R_MIPS_INSERT_A }, |
| 664 | { R_MIPS_INSERT_B }, |
| 665 | { R_MIPS_DELETE }, |
| 666 | |
| 667 | /* Get the higher values of a 64 bit addend. Presumably not used in |
| 668 | 32 bit ELF. */ |
| 669 | { R_MIPS_HIGHER }, |
| 670 | { R_MIPS_HIGHEST }, |
| 671 | |
| 672 | /* High 16 bits of displacement in global offset table. */ |
| 673 | /* FIXME: Not handled correctly. */ |
| 674 | HOWTO (R_MIPS_CALL_HI16, /* type */ |
| 675 | 0, /* rightshift */ |
| 676 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 677 | 16, /* bitsize */ |
| 678 | false, /* pc_relative */ |
| 679 | 0, /* bitpos */ |
| 680 | complain_overflow_dont, /* complain_on_overflow */ |
| 681 | bfd_elf_generic_reloc, /* special_function */ |
| 682 | "R_MIPS_CALL_HI16", /* name */ |
| 683 | true, /* partial_inplace */ |
| 684 | 0x0000ffff, /* src_mask */ |
| 685 | 0x0000ffff, /* dst_mask */ |
| 686 | false), /* pcrel_offset */ |
| 687 | |
| 688 | /* Low 16 bits of displacement in global offset table. */ |
| 689 | /* FIXME: Not handled correctly. */ |
| 690 | HOWTO (R_MIPS_CALL_LO16, /* type */ |
| 691 | 0, /* rightshift */ |
| 692 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 693 | 16, /* bitsize */ |
| 694 | false, /* pc_relative */ |
| 695 | 0, /* bitpos */ |
| 696 | complain_overflow_dont, /* complain_on_overflow */ |
| 697 | bfd_elf_generic_reloc, /* special_function */ |
| 698 | "R_MIPS_CALL_LO16", /* name */ |
| 699 | true, /* partial_inplace */ |
| 700 | 0x0000ffff, /* src_mask */ |
| 701 | 0x0000ffff, /* dst_mask */ |
| 702 | false) /* pcrel_offset */ |
| 703 | }; |
| 704 | |
| 705 | /* The reloc used for BFD_RELOC_CTOR when doing a 64 bit link. This |
| 706 | is a hack to make the linker think that we need 64 bit values. */ |
| 707 | static reloc_howto_type elf_mips_ctor64_howto = |
| 708 | HOWTO (R_MIPS_64, /* type */ |
| 709 | 0, /* rightshift */ |
| 710 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 711 | 32, /* bitsize */ |
| 712 | false, /* pc_relative */ |
| 713 | 0, /* bitpos */ |
| 714 | complain_overflow_signed, /* complain_on_overflow */ |
| 715 | mips32_64bit_reloc, /* special_function */ |
| 716 | "R_MIPS_64", /* name */ |
| 717 | true, /* partial_inplace */ |
| 718 | 0xffffffff, /* src_mask */ |
| 719 | 0xffffffff, /* dst_mask */ |
| 720 | false); /* pcrel_offset */ |
| 721 | |
| 722 | /* The reloc used for the mips16 jump instruction. */ |
| 723 | static reloc_howto_type elf_mips16_jump_howto = |
| 724 | HOWTO (R_MIPS16_26, /* type */ |
| 725 | 2, /* rightshift */ |
| 726 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 727 | 26, /* bitsize */ |
| 728 | false, /* pc_relative */ |
| 729 | 0, /* bitpos */ |
| 730 | complain_overflow_dont, /* complain_on_overflow */ |
| 731 | /* This needs complex overflow |
| 732 | detection, because the upper four |
| 733 | bits must match the PC. */ |
| 734 | mips16_jump_reloc, /* special_function */ |
| 735 | "R_MIPS16_26", /* name */ |
| 736 | true, /* partial_inplace */ |
| 737 | 0x3ffffff, /* src_mask */ |
| 738 | 0x3ffffff, /* dst_mask */ |
| 739 | false); /* pcrel_offset */ |
| 740 | |
| 741 | /* The reloc used for the mips16 gprel instruction. The src_mask and |
| 742 | dsk_mask for this howto do not reflect the actual instruction, in |
| 743 | which the value is not contiguous; the masks are for the |
| 744 | convenience of the relocate_section routine. */ |
| 745 | static reloc_howto_type elf_mips16_gprel_howto = |
| 746 | HOWTO (R_MIPS16_GPREL, /* type */ |
| 747 | 0, /* rightshift */ |
| 748 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 749 | 16, /* bitsize */ |
| 750 | false, /* pc_relative */ |
| 751 | 0, /* bitpos */ |
| 752 | complain_overflow_signed, /* complain_on_overflow */ |
| 753 | mips16_gprel_reloc, /* special_function */ |
| 754 | "R_MIPS16_GPREL", /* name */ |
| 755 | true, /* partial_inplace */ |
| 756 | 0xffff, /* src_mask */ |
| 757 | 0xffff, /* dst_mask */ |
| 758 | false); /* pcrel_offset */ |
| 759 | |
| 760 | /* start-sanitize-sky */ |
| 761 | /* DVP relocations. */ |
| 762 | static reloc_howto_type elf_mips_dvp_11_pcrel_howto = |
| 763 | HOWTO (R_MIPS_DVP_11_PCREL, /* type */ |
| 764 | 3, /* rightshift */ |
| 765 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 766 | 11, /* bitsize */ |
| 767 | true, /* pc_relative */ |
| 768 | 0, /* bitpos */ |
| 769 | complain_overflow_signed, /* complain_on_overflow */ |
| 770 | bfd_elf_generic_reloc, /* special_function */ |
| 771 | "R_MIPS_DVP_11_PCREL", /* name */ |
| 772 | true, /* partial_inplace */ |
| 773 | 0x7ff, /* src_mask */ |
| 774 | 0x7ff, /* dst_mask */ |
| 775 | true); /* pcrel_offset */ |
| 776 | /* end-sanitize-sky */ |
| 777 | |
| 778 | /* Do a R_MIPS_HI16 relocation. This has to be done in combination |
| 779 | with a R_MIPS_LO16 reloc, because there is a carry from the LO16 to |
| 780 | the HI16. Here we just save the information we need; we do the |
| 781 | actual relocation when we see the LO16. MIPS ELF requires that the |
| 782 | LO16 immediately follow the HI16. As a GNU extension, we permit an |
| 783 | arbitrary number of HI16 relocs to be associated with a single LO16 |
| 784 | reloc. This extension permits gcc to output the HI and LO relocs |
| 785 | itself. */ |
| 786 | |
| 787 | struct mips_hi16 |
| 788 | { |
| 789 | struct mips_hi16 *next; |
| 790 | bfd_byte *addr; |
| 791 | bfd_vma addend; |
| 792 | }; |
| 793 | |
| 794 | /* FIXME: This should not be a static variable. */ |
| 795 | |
| 796 | static struct mips_hi16 *mips_hi16_list; |
| 797 | |
| 798 | bfd_reloc_status_type |
| 799 | _bfd_mips_elf_hi16_reloc (abfd, |
| 800 | reloc_entry, |
| 801 | symbol, |
| 802 | data, |
| 803 | input_section, |
| 804 | output_bfd, |
| 805 | error_message) |
| 806 | bfd *abfd; |
| 807 | arelent *reloc_entry; |
| 808 | asymbol *symbol; |
| 809 | PTR data; |
| 810 | asection *input_section; |
| 811 | bfd *output_bfd; |
| 812 | char **error_message; |
| 813 | { |
| 814 | bfd_reloc_status_type ret; |
| 815 | bfd_vma relocation; |
| 816 | struct mips_hi16 *n; |
| 817 | |
| 818 | /* If we're relocating, and this an external symbol, we don't want |
| 819 | to change anything. */ |
| 820 | if (output_bfd != (bfd *) NULL |
| 821 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 822 | && reloc_entry->addend == 0) |
| 823 | { |
| 824 | reloc_entry->address += input_section->output_offset; |
| 825 | return bfd_reloc_ok; |
| 826 | } |
| 827 | |
| 828 | ret = bfd_reloc_ok; |
| 829 | |
| 830 | if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) |
| 831 | { |
| 832 | boolean relocateable; |
| 833 | bfd_vma gp; |
| 834 | |
| 835 | if (ret == bfd_reloc_undefined) |
| 836 | abort (); |
| 837 | |
| 838 | if (output_bfd != NULL) |
| 839 | relocateable = true; |
| 840 | else |
| 841 | { |
| 842 | relocateable = false; |
| 843 | output_bfd = symbol->section->output_section->owner; |
| 844 | } |
| 845 | |
| 846 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, |
| 847 | error_message, &gp); |
| 848 | if (ret != bfd_reloc_ok) |
| 849 | return ret; |
| 850 | |
| 851 | relocation = gp - reloc_entry->address; |
| 852 | } |
| 853 | else |
| 854 | { |
| 855 | if (bfd_is_und_section (symbol->section) |
| 856 | && output_bfd == (bfd *) NULL) |
| 857 | ret = bfd_reloc_undefined; |
| 858 | |
| 859 | if (bfd_is_com_section (symbol->section)) |
| 860 | relocation = 0; |
| 861 | else |
| 862 | relocation = symbol->value; |
| 863 | } |
| 864 | |
| 865 | relocation += symbol->section->output_section->vma; |
| 866 | relocation += symbol->section->output_offset; |
| 867 | relocation += reloc_entry->addend; |
| 868 | |
| 869 | if (reloc_entry->address > input_section->_cooked_size) |
| 870 | return bfd_reloc_outofrange; |
| 871 | |
| 872 | /* Save the information, and let LO16 do the actual relocation. */ |
| 873 | n = (struct mips_hi16 *) bfd_malloc (sizeof *n); |
| 874 | if (n == NULL) |
| 875 | return bfd_reloc_outofrange; |
| 876 | n->addr = (bfd_byte *) data + reloc_entry->address; |
| 877 | n->addend = relocation; |
| 878 | n->next = mips_hi16_list; |
| 879 | mips_hi16_list = n; |
| 880 | |
| 881 | if (output_bfd != (bfd *) NULL) |
| 882 | reloc_entry->address += input_section->output_offset; |
| 883 | |
| 884 | return ret; |
| 885 | } |
| 886 | |
| 887 | /* Do a R_MIPS_LO16 relocation. This is a straightforward 16 bit |
| 888 | inplace relocation; this function exists in order to do the |
| 889 | R_MIPS_HI16 relocation described above. */ |
| 890 | |
| 891 | bfd_reloc_status_type |
| 892 | _bfd_mips_elf_lo16_reloc (abfd, |
| 893 | reloc_entry, |
| 894 | symbol, |
| 895 | data, |
| 896 | input_section, |
| 897 | output_bfd, |
| 898 | error_message) |
| 899 | bfd *abfd; |
| 900 | arelent *reloc_entry; |
| 901 | asymbol *symbol; |
| 902 | PTR data; |
| 903 | asection *input_section; |
| 904 | bfd *output_bfd; |
| 905 | char **error_message; |
| 906 | { |
| 907 | arelent gp_disp_relent; |
| 908 | |
| 909 | if (mips_hi16_list != NULL) |
| 910 | { |
| 911 | struct mips_hi16 *l; |
| 912 | |
| 913 | l = mips_hi16_list; |
| 914 | while (l != NULL) |
| 915 | { |
| 916 | unsigned long insn; |
| 917 | unsigned long val; |
| 918 | unsigned long vallo; |
| 919 | struct mips_hi16 *next; |
| 920 | |
| 921 | /* Do the HI16 relocation. Note that we actually don't need |
| 922 | to know anything about the LO16 itself, except where to |
| 923 | find the low 16 bits of the addend needed by the LO16. */ |
| 924 | insn = bfd_get_32 (abfd, l->addr); |
| 925 | vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address) |
| 926 | & 0xffff); |
| 927 | val = ((insn & 0xffff) << 16) + vallo; |
| 928 | val += l->addend; |
| 929 | |
| 930 | /* The low order 16 bits are always treated as a signed |
| 931 | value. Therefore, a negative value in the low order bits |
| 932 | requires an adjustment in the high order bits. We need |
| 933 | to make this adjustment in two ways: once for the bits we |
| 934 | took from the data, and once for the bits we are putting |
| 935 | back in to the data. */ |
| 936 | if ((vallo & 0x8000) != 0) |
| 937 | val -= 0x10000; |
| 938 | if ((val & 0x8000) != 0) |
| 939 | val += 0x10000; |
| 940 | |
| 941 | insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff); |
| 942 | bfd_put_32 (abfd, insn, l->addr); |
| 943 | |
| 944 | if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) |
| 945 | { |
| 946 | gp_disp_relent = *reloc_entry; |
| 947 | reloc_entry = &gp_disp_relent; |
| 948 | reloc_entry->addend = l->addend; |
| 949 | } |
| 950 | |
| 951 | next = l->next; |
| 952 | free (l); |
| 953 | l = next; |
| 954 | } |
| 955 | |
| 956 | mips_hi16_list = NULL; |
| 957 | } |
| 958 | else if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) |
| 959 | { |
| 960 | bfd_reloc_status_type ret; |
| 961 | bfd_vma gp, relocation; |
| 962 | |
| 963 | /* FIXME: Does this case ever occur? */ |
| 964 | |
| 965 | ret = mips_elf_final_gp (output_bfd, symbol, true, error_message, &gp); |
| 966 | if (ret != bfd_reloc_ok) |
| 967 | return ret; |
| 968 | |
| 969 | relocation = gp - reloc_entry->address; |
| 970 | relocation += symbol->section->output_section->vma; |
| 971 | relocation += symbol->section->output_offset; |
| 972 | relocation += reloc_entry->addend; |
| 973 | |
| 974 | if (reloc_entry->address > input_section->_cooked_size) |
| 975 | return bfd_reloc_outofrange; |
| 976 | |
| 977 | gp_disp_relent = *reloc_entry; |
| 978 | reloc_entry = &gp_disp_relent; |
| 979 | reloc_entry->addend = relocation - 4; |
| 980 | } |
| 981 | |
| 982 | /* Now do the LO16 reloc in the usual way. */ |
| 983 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 984 | input_section, output_bfd, error_message); |
| 985 | } |
| 986 | |
| 987 | /* Do a R_MIPS_GOT16 reloc. This is a reloc against the global offset |
| 988 | table used for PIC code. If the symbol is an external symbol, the |
| 989 | instruction is modified to contain the offset of the appropriate |
| 990 | entry in the global offset table. If the symbol is a section |
| 991 | symbol, the next reloc is a R_MIPS_LO16 reloc. The two 16 bit |
| 992 | addends are combined to form the real addend against the section |
| 993 | symbol; the GOT16 is modified to contain the offset of an entry in |
| 994 | the global offset table, and the LO16 is modified to offset it |
| 995 | appropriately. Thus an offset larger than 16 bits requires a |
| 996 | modified value in the global offset table. |
| 997 | |
| 998 | This implementation suffices for the assembler, but the linker does |
| 999 | not yet know how to create global offset tables. */ |
| 1000 | |
| 1001 | bfd_reloc_status_type |
| 1002 | _bfd_mips_elf_got16_reloc (abfd, |
| 1003 | reloc_entry, |
| 1004 | symbol, |
| 1005 | data, |
| 1006 | input_section, |
| 1007 | output_bfd, |
| 1008 | error_message) |
| 1009 | bfd *abfd; |
| 1010 | arelent *reloc_entry; |
| 1011 | asymbol *symbol; |
| 1012 | PTR data; |
| 1013 | asection *input_section; |
| 1014 | bfd *output_bfd; |
| 1015 | char **error_message; |
| 1016 | { |
| 1017 | /* If we're relocating, and this an external symbol, we don't want |
| 1018 | to change anything. */ |
| 1019 | if (output_bfd != (bfd *) NULL |
| 1020 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 1021 | && reloc_entry->addend == 0) |
| 1022 | { |
| 1023 | reloc_entry->address += input_section->output_offset; |
| 1024 | return bfd_reloc_ok; |
| 1025 | } |
| 1026 | |
| 1027 | /* If we're relocating, and this is a local symbol, we can handle it |
| 1028 | just like HI16. */ |
| 1029 | if (output_bfd != (bfd *) NULL |
| 1030 | && (symbol->flags & BSF_SECTION_SYM) != 0) |
| 1031 | return _bfd_mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data, |
| 1032 | input_section, output_bfd, error_message); |
| 1033 | |
| 1034 | abort (); |
| 1035 | } |
| 1036 | |
| 1037 | /* We have to figure out the gp value, so that we can adjust the |
| 1038 | symbol value correctly. We look up the symbol _gp in the output |
| 1039 | BFD. If we can't find it, we're stuck. We cache it in the ELF |
| 1040 | target data. We don't need to adjust the symbol value for an |
| 1041 | external symbol if we are producing relocateable output. */ |
| 1042 | |
| 1043 | static bfd_reloc_status_type |
| 1044 | mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, pgp) |
| 1045 | bfd *output_bfd; |
| 1046 | asymbol *symbol; |
| 1047 | boolean relocateable; |
| 1048 | char **error_message; |
| 1049 | bfd_vma *pgp; |
| 1050 | { |
| 1051 | if (bfd_is_und_section (symbol->section) |
| 1052 | && ! relocateable) |
| 1053 | { |
| 1054 | *pgp = 0; |
| 1055 | return bfd_reloc_undefined; |
| 1056 | } |
| 1057 | |
| 1058 | *pgp = _bfd_get_gp_value (output_bfd); |
| 1059 | if (*pgp == 0 |
| 1060 | && (! relocateable |
| 1061 | || (symbol->flags & BSF_SECTION_SYM) != 0)) |
| 1062 | { |
| 1063 | if (relocateable) |
| 1064 | { |
| 1065 | /* Make up a value. */ |
| 1066 | *pgp = symbol->section->output_section->vma + 0x4000; |
| 1067 | _bfd_set_gp_value (output_bfd, *pgp); |
| 1068 | } |
| 1069 | else |
| 1070 | { |
| 1071 | unsigned int count; |
| 1072 | asymbol **sym; |
| 1073 | unsigned int i; |
| 1074 | |
| 1075 | count = bfd_get_symcount (output_bfd); |
| 1076 | sym = bfd_get_outsymbols (output_bfd); |
| 1077 | |
| 1078 | if (sym == (asymbol **) NULL) |
| 1079 | i = count; |
| 1080 | else |
| 1081 | { |
| 1082 | for (i = 0; i < count; i++, sym++) |
| 1083 | { |
| 1084 | register CONST char *name; |
| 1085 | |
| 1086 | name = bfd_asymbol_name (*sym); |
| 1087 | if (*name == '_' && strcmp (name, "_gp") == 0) |
| 1088 | { |
| 1089 | *pgp = bfd_asymbol_value (*sym); |
| 1090 | _bfd_set_gp_value (output_bfd, *pgp); |
| 1091 | break; |
| 1092 | } |
| 1093 | } |
| 1094 | } |
| 1095 | |
| 1096 | if (i >= count) |
| 1097 | { |
| 1098 | /* Only get the error once. */ |
| 1099 | *pgp = 4; |
| 1100 | _bfd_set_gp_value (output_bfd, *pgp); |
| 1101 | *error_message = |
| 1102 | (char *) "GP relative relocation when _gp not defined"; |
| 1103 | return bfd_reloc_dangerous; |
| 1104 | } |
| 1105 | } |
| 1106 | } |
| 1107 | |
| 1108 | return bfd_reloc_ok; |
| 1109 | } |
| 1110 | |
| 1111 | /* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must |
| 1112 | become the offset from the gp register. This function also handles |
| 1113 | R_MIPS_LITERAL relocations, although those can be handled more |
| 1114 | cleverly because the entries in the .lit8 and .lit4 sections can be |
| 1115 | merged. */ |
| 1116 | |
| 1117 | static bfd_reloc_status_type gprel16_with_gp PARAMS ((bfd *, asymbol *, |
| 1118 | arelent *, asection *, |
| 1119 | boolean, PTR, bfd_vma)); |
| 1120 | |
| 1121 | bfd_reloc_status_type |
| 1122 | _bfd_mips_elf_gprel16_reloc (abfd, reloc_entry, symbol, data, input_section, |
| 1123 | output_bfd, error_message) |
| 1124 | bfd *abfd; |
| 1125 | arelent *reloc_entry; |
| 1126 | asymbol *symbol; |
| 1127 | PTR data; |
| 1128 | asection *input_section; |
| 1129 | bfd *output_bfd; |
| 1130 | char **error_message; |
| 1131 | { |
| 1132 | boolean relocateable; |
| 1133 | bfd_reloc_status_type ret; |
| 1134 | bfd_vma gp; |
| 1135 | |
| 1136 | /* If we're relocating, and this is an external symbol with no |
| 1137 | addend, we don't want to change anything. We will only have an |
| 1138 | addend if this is a newly created reloc, not read from an ELF |
| 1139 | file. */ |
| 1140 | if (output_bfd != (bfd *) NULL |
| 1141 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 1142 | && reloc_entry->addend == 0) |
| 1143 | { |
| 1144 | reloc_entry->address += input_section->output_offset; |
| 1145 | return bfd_reloc_ok; |
| 1146 | } |
| 1147 | |
| 1148 | if (output_bfd != (bfd *) NULL) |
| 1149 | relocateable = true; |
| 1150 | else |
| 1151 | { |
| 1152 | relocateable = false; |
| 1153 | output_bfd = symbol->section->output_section->owner; |
| 1154 | } |
| 1155 | |
| 1156 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, |
| 1157 | &gp); |
| 1158 | if (ret != bfd_reloc_ok) |
| 1159 | return ret; |
| 1160 | |
| 1161 | return gprel16_with_gp (abfd, symbol, reloc_entry, input_section, |
| 1162 | relocateable, data, gp); |
| 1163 | } |
| 1164 | |
| 1165 | static bfd_reloc_status_type |
| 1166 | gprel16_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data, |
| 1167 | gp) |
| 1168 | bfd *abfd; |
| 1169 | asymbol *symbol; |
| 1170 | arelent *reloc_entry; |
| 1171 | asection *input_section; |
| 1172 | boolean relocateable; |
| 1173 | PTR data; |
| 1174 | bfd_vma gp; |
| 1175 | { |
| 1176 | bfd_vma relocation; |
| 1177 | unsigned long insn; |
| 1178 | unsigned long val; |
| 1179 | |
| 1180 | if (bfd_is_com_section (symbol->section)) |
| 1181 | relocation = 0; |
| 1182 | else |
| 1183 | relocation = symbol->value; |
| 1184 | |
| 1185 | relocation += symbol->section->output_section->vma; |
| 1186 | relocation += symbol->section->output_offset; |
| 1187 | |
| 1188 | if (reloc_entry->address > input_section->_cooked_size) |
| 1189 | return bfd_reloc_outofrange; |
| 1190 | |
| 1191 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 1192 | |
| 1193 | /* Set val to the offset into the section or symbol. */ |
| 1194 | if (reloc_entry->howto->src_mask == 0) |
| 1195 | { |
| 1196 | /* This case occurs with the 64-bit MIPS ELF ABI. */ |
| 1197 | val = reloc_entry->addend; |
| 1198 | } |
| 1199 | else |
| 1200 | { |
| 1201 | val = ((insn & 0xffff) + reloc_entry->addend) & 0xffff; |
| 1202 | if (val & 0x8000) |
| 1203 | val -= 0x10000; |
| 1204 | } |
| 1205 | |
| 1206 | /* Adjust val for the final section location and GP value. If we |
| 1207 | are producing relocateable output, we don't want to do this for |
| 1208 | an external symbol. */ |
| 1209 | if (! relocateable |
| 1210 | || (symbol->flags & BSF_SECTION_SYM) != 0) |
| 1211 | val += relocation - gp; |
| 1212 | |
| 1213 | insn = (insn &~ 0xffff) | (val & 0xffff); |
| 1214 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); |
| 1215 | |
| 1216 | if (relocateable) |
| 1217 | reloc_entry->address += input_section->output_offset; |
| 1218 | |
| 1219 | /* Make sure it fit in 16 bits. */ |
| 1220 | if (val >= 0x8000 && val < 0xffff8000) |
| 1221 | return bfd_reloc_overflow; |
| 1222 | |
| 1223 | return bfd_reloc_ok; |
| 1224 | } |
| 1225 | |
| 1226 | /* Do a R_MIPS_GPREL32 relocation. Is this 32 bit value the offset |
| 1227 | from the gp register? XXX */ |
| 1228 | |
| 1229 | static bfd_reloc_status_type gprel32_with_gp PARAMS ((bfd *, asymbol *, |
| 1230 | arelent *, asection *, |
| 1231 | boolean, PTR, bfd_vma)); |
| 1232 | |
| 1233 | bfd_reloc_status_type |
| 1234 | _bfd_mips_elf_gprel32_reloc (abfd, |
| 1235 | reloc_entry, |
| 1236 | symbol, |
| 1237 | data, |
| 1238 | input_section, |
| 1239 | output_bfd, |
| 1240 | error_message) |
| 1241 | bfd *abfd; |
| 1242 | arelent *reloc_entry; |
| 1243 | asymbol *symbol; |
| 1244 | PTR data; |
| 1245 | asection *input_section; |
| 1246 | bfd *output_bfd; |
| 1247 | char **error_message; |
| 1248 | { |
| 1249 | boolean relocateable; |
| 1250 | bfd_reloc_status_type ret; |
| 1251 | bfd_vma gp; |
| 1252 | |
| 1253 | /* If we're relocating, and this is an external symbol with no |
| 1254 | addend, we don't want to change anything. We will only have an |
| 1255 | addend if this is a newly created reloc, not read from an ELF |
| 1256 | file. */ |
| 1257 | if (output_bfd != (bfd *) NULL |
| 1258 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 1259 | && reloc_entry->addend == 0) |
| 1260 | { |
| 1261 | *error_message = (char *) |
| 1262 | "32bits gp relative relocation occurs for an external symbol"; |
| 1263 | return bfd_reloc_outofrange; |
| 1264 | } |
| 1265 | |
| 1266 | if (output_bfd != (bfd *) NULL) |
| 1267 | { |
| 1268 | relocateable = true; |
| 1269 | gp = _bfd_get_gp_value (output_bfd); |
| 1270 | } |
| 1271 | else |
| 1272 | { |
| 1273 | relocateable = false; |
| 1274 | output_bfd = symbol->section->output_section->owner; |
| 1275 | |
| 1276 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, |
| 1277 | error_message, &gp); |
| 1278 | if (ret != bfd_reloc_ok) |
| 1279 | return ret; |
| 1280 | } |
| 1281 | |
| 1282 | return gprel32_with_gp (abfd, symbol, reloc_entry, input_section, |
| 1283 | relocateable, data, gp); |
| 1284 | } |
| 1285 | |
| 1286 | static bfd_reloc_status_type |
| 1287 | gprel32_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data, |
| 1288 | gp) |
| 1289 | bfd *abfd; |
| 1290 | asymbol *symbol; |
| 1291 | arelent *reloc_entry; |
| 1292 | asection *input_section; |
| 1293 | boolean relocateable; |
| 1294 | PTR data; |
| 1295 | bfd_vma gp; |
| 1296 | { |
| 1297 | bfd_vma relocation; |
| 1298 | unsigned long val; |
| 1299 | |
| 1300 | if (bfd_is_com_section (symbol->section)) |
| 1301 | relocation = 0; |
| 1302 | else |
| 1303 | relocation = symbol->value; |
| 1304 | |
| 1305 | relocation += symbol->section->output_section->vma; |
| 1306 | relocation += symbol->section->output_offset; |
| 1307 | |
| 1308 | if (reloc_entry->address > input_section->_cooked_size) |
| 1309 | return bfd_reloc_outofrange; |
| 1310 | |
| 1311 | if (reloc_entry->howto->src_mask == 0) |
| 1312 | { |
| 1313 | /* This case arises with the 64-bit MIPS ELF ABI. */ |
| 1314 | val = 0; |
| 1315 | } |
| 1316 | else |
| 1317 | val = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 1318 | |
| 1319 | /* Set val to the offset into the section or symbol. */ |
| 1320 | val += reloc_entry->addend; |
| 1321 | |
| 1322 | /* Adjust val for the final section location and GP value. If we |
| 1323 | are producing relocateable output, we don't want to do this for |
| 1324 | an external symbol. */ |
| 1325 | if (! relocateable |
| 1326 | || (symbol->flags & BSF_SECTION_SYM) != 0) |
| 1327 | val += relocation - gp; |
| 1328 | |
| 1329 | bfd_put_32 (abfd, val, (bfd_byte *) data + reloc_entry->address); |
| 1330 | |
| 1331 | if (relocateable) |
| 1332 | reloc_entry->address += input_section->output_offset; |
| 1333 | |
| 1334 | return bfd_reloc_ok; |
| 1335 | } |
| 1336 | |
| 1337 | /* Handle a 64 bit reloc in a 32 bit MIPS ELF file. These are |
| 1338 | generated when addreses are 64 bits. The upper 32 bits are a simle |
| 1339 | sign extension. */ |
| 1340 | |
| 1341 | static bfd_reloc_status_type |
| 1342 | mips32_64bit_reloc (abfd, reloc_entry, symbol, data, input_section, |
| 1343 | output_bfd, error_message) |
| 1344 | bfd *abfd; |
| 1345 | arelent *reloc_entry; |
| 1346 | asymbol *symbol; |
| 1347 | PTR data; |
| 1348 | asection *input_section; |
| 1349 | bfd *output_bfd; |
| 1350 | char **error_message; |
| 1351 | { |
| 1352 | bfd_reloc_status_type r; |
| 1353 | arelent reloc32; |
| 1354 | unsigned long val; |
| 1355 | bfd_size_type addr; |
| 1356 | |
| 1357 | r = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1358 | input_section, output_bfd, error_message); |
| 1359 | if (r != bfd_reloc_continue) |
| 1360 | return r; |
| 1361 | |
| 1362 | /* Do a normal 32 bit relocation on the lower 32 bits. */ |
| 1363 | reloc32 = *reloc_entry; |
| 1364 | if (bfd_big_endian (abfd)) |
| 1365 | reloc32.address += 4; |
| 1366 | reloc32.howto = &elf_mips_howto_table[R_MIPS_32]; |
| 1367 | r = bfd_perform_relocation (abfd, &reloc32, data, input_section, |
| 1368 | output_bfd, error_message); |
| 1369 | |
| 1370 | /* Sign extend into the upper 32 bits. */ |
| 1371 | val = bfd_get_32 (abfd, (bfd_byte *) data + reloc32.address); |
| 1372 | if ((val & 0x80000000) != 0) |
| 1373 | val = 0xffffffff; |
| 1374 | else |
| 1375 | val = 0; |
| 1376 | addr = reloc_entry->address; |
| 1377 | if (bfd_little_endian (abfd)) |
| 1378 | addr += 4; |
| 1379 | bfd_put_32 (abfd, val, (bfd_byte *) data + addr); |
| 1380 | |
| 1381 | return r; |
| 1382 | } |
| 1383 | |
| 1384 | /* Handle a mips16 jump. */ |
| 1385 | |
| 1386 | static bfd_reloc_status_type |
| 1387 | mips16_jump_reloc (abfd, reloc_entry, symbol, data, input_section, |
| 1388 | output_bfd, error_message) |
| 1389 | bfd *abfd; |
| 1390 | arelent *reloc_entry; |
| 1391 | asymbol *symbol; |
| 1392 | PTR data; |
| 1393 | asection *input_section; |
| 1394 | bfd *output_bfd; |
| 1395 | char **error_message; |
| 1396 | { |
| 1397 | if (output_bfd != (bfd *) NULL |
| 1398 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 1399 | && reloc_entry->addend == 0) |
| 1400 | { |
| 1401 | reloc_entry->address += input_section->output_offset; |
| 1402 | return bfd_reloc_ok; |
| 1403 | } |
| 1404 | |
| 1405 | /* FIXME. */ |
| 1406 | { |
| 1407 | static boolean warned; |
| 1408 | |
| 1409 | if (! warned) |
| 1410 | (*_bfd_error_handler) |
| 1411 | ("Linking mips16 objects into %s format is not supported", |
| 1412 | bfd_get_target (input_section->output_section->owner)); |
| 1413 | warned = true; |
| 1414 | } |
| 1415 | |
| 1416 | return bfd_reloc_undefined; |
| 1417 | } |
| 1418 | |
| 1419 | /* Handle a mips16 GP relative reloc. */ |
| 1420 | |
| 1421 | static bfd_reloc_status_type |
| 1422 | mips16_gprel_reloc (abfd, reloc_entry, symbol, data, input_section, |
| 1423 | output_bfd, error_message) |
| 1424 | bfd *abfd; |
| 1425 | arelent *reloc_entry; |
| 1426 | asymbol *symbol; |
| 1427 | PTR data; |
| 1428 | asection *input_section; |
| 1429 | bfd *output_bfd; |
| 1430 | char **error_message; |
| 1431 | { |
| 1432 | boolean relocateable; |
| 1433 | bfd_reloc_status_type ret; |
| 1434 | bfd_vma gp; |
| 1435 | unsigned short extend, insn; |
| 1436 | unsigned long final; |
| 1437 | |
| 1438 | /* If we're relocating, and this is an external symbol with no |
| 1439 | addend, we don't want to change anything. We will only have an |
| 1440 | addend if this is a newly created reloc, not read from an ELF |
| 1441 | file. */ |
| 1442 | if (output_bfd != NULL |
| 1443 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 1444 | && reloc_entry->addend == 0) |
| 1445 | { |
| 1446 | reloc_entry->address += input_section->output_offset; |
| 1447 | return bfd_reloc_ok; |
| 1448 | } |
| 1449 | |
| 1450 | if (output_bfd != NULL) |
| 1451 | relocateable = true; |
| 1452 | else |
| 1453 | { |
| 1454 | relocateable = false; |
| 1455 | output_bfd = symbol->section->output_section->owner; |
| 1456 | } |
| 1457 | |
| 1458 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, |
| 1459 | &gp); |
| 1460 | if (ret != bfd_reloc_ok) |
| 1461 | return ret; |
| 1462 | |
| 1463 | if (reloc_entry->address > input_section->_cooked_size) |
| 1464 | return bfd_reloc_outofrange; |
| 1465 | |
| 1466 | /* Pick up the mips16 extend instruction and the real instruction. */ |
| 1467 | extend = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 1468 | insn = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address + 2); |
| 1469 | |
| 1470 | /* Stuff the current addend back as a 32 bit value, do the usual |
| 1471 | relocation, and then clean up. */ |
| 1472 | bfd_put_32 (abfd, |
| 1473 | (((extend & 0x1f) << 11) |
| 1474 | | (extend & 0x7e0) |
| 1475 | | (insn & 0x1f)), |
| 1476 | (bfd_byte *) data + reloc_entry->address); |
| 1477 | |
| 1478 | ret = gprel16_with_gp (abfd, symbol, reloc_entry, input_section, |
| 1479 | relocateable, data, gp); |
| 1480 | |
| 1481 | final = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 1482 | bfd_put_16 (abfd, |
| 1483 | ((extend & 0xf800) |
| 1484 | | ((final >> 11) & 0x1f) |
| 1485 | | (final & 0x7e0)), |
| 1486 | (bfd_byte *) data + reloc_entry->address); |
| 1487 | bfd_put_16 (abfd, |
| 1488 | ((insn & 0xffe0) |
| 1489 | | (final & 0x1f)), |
| 1490 | (bfd_byte *) data + reloc_entry->address + 2); |
| 1491 | |
| 1492 | return ret; |
| 1493 | } |
| 1494 | |
| 1495 | /* Return the ISA for a MIPS e_flags value. */ |
| 1496 | |
| 1497 | static INLINE int |
| 1498 | elf_mips_isa (flags) |
| 1499 | flagword flags; |
| 1500 | { |
| 1501 | switch (flags & EF_MIPS_ARCH) |
| 1502 | { |
| 1503 | case E_MIPS_ARCH_1: |
| 1504 | return 1; |
| 1505 | case E_MIPS_ARCH_2: |
| 1506 | return 2; |
| 1507 | case E_MIPS_ARCH_3: |
| 1508 | return 3; |
| 1509 | case E_MIPS_ARCH_4: |
| 1510 | return 4; |
| 1511 | } |
| 1512 | return 4; |
| 1513 | } |
| 1514 | |
| 1515 | /* A mapping from BFD reloc types to MIPS ELF reloc types. */ |
| 1516 | |
| 1517 | struct elf_reloc_map { |
| 1518 | bfd_reloc_code_real_type bfd_reloc_val; |
| 1519 | enum reloc_type elf_reloc_val; |
| 1520 | }; |
| 1521 | |
| 1522 | static CONST struct elf_reloc_map mips_reloc_map[] = |
| 1523 | { |
| 1524 | { BFD_RELOC_NONE, R_MIPS_NONE, }, |
| 1525 | { BFD_RELOC_16, R_MIPS_16 }, |
| 1526 | { BFD_RELOC_32, R_MIPS_32 }, |
| 1527 | { BFD_RELOC_64, R_MIPS_64 }, |
| 1528 | { BFD_RELOC_MIPS_JMP, R_MIPS_26 }, |
| 1529 | { BFD_RELOC_HI16_S, R_MIPS_HI16 }, |
| 1530 | { BFD_RELOC_LO16, R_MIPS_LO16 }, |
| 1531 | { BFD_RELOC_MIPS_GPREL, R_MIPS_GPREL16 }, |
| 1532 | { BFD_RELOC_MIPS_LITERAL, R_MIPS_LITERAL }, |
| 1533 | { BFD_RELOC_MIPS_GOT16, R_MIPS_GOT16 }, |
| 1534 | { BFD_RELOC_16_PCREL, R_MIPS_PC16 }, |
| 1535 | { BFD_RELOC_MIPS_CALL16, R_MIPS_CALL16 }, |
| 1536 | { BFD_RELOC_MIPS_GPREL32, R_MIPS_GPREL32 }, |
| 1537 | { BFD_RELOC_MIPS_GOT_HI16, R_MIPS_GOT_HI16 }, |
| 1538 | { BFD_RELOC_MIPS_GOT_LO16, R_MIPS_GOT_LO16 }, |
| 1539 | { BFD_RELOC_MIPS_CALL_HI16, R_MIPS_CALL_HI16 }, |
| 1540 | { BFD_RELOC_MIPS_CALL_LO16, R_MIPS_CALL_LO16 } |
| 1541 | }; |
| 1542 | |
| 1543 | /* Given a BFD reloc type, return a howto structure. */ |
| 1544 | |
| 1545 | static reloc_howto_type * |
| 1546 | bfd_elf32_bfd_reloc_type_lookup (abfd, code) |
| 1547 | bfd *abfd; |
| 1548 | bfd_reloc_code_real_type code; |
| 1549 | { |
| 1550 | unsigned int i; |
| 1551 | |
| 1552 | for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map); i++) |
| 1553 | { |
| 1554 | if (mips_reloc_map[i].bfd_reloc_val == code) |
| 1555 | return &elf_mips_howto_table[(int) mips_reloc_map[i].elf_reloc_val]; |
| 1556 | } |
| 1557 | |
| 1558 | /* We need to handle BFD_RELOC_CTOR specially. If this is a mips3 |
| 1559 | file, then we assume that we are using 64 bit addresses, and use |
| 1560 | R_MIPS_64. Otherwise, we use R_MIPS_32. */ |
| 1561 | if (code == BFD_RELOC_CTOR) |
| 1562 | { |
| 1563 | if (elf_mips_isa (elf_elfheader (abfd)->e_flags) < 3) |
| 1564 | return &elf_mips_howto_table[(int) R_MIPS_32]; |
| 1565 | else |
| 1566 | return &elf_mips_ctor64_howto; |
| 1567 | } |
| 1568 | |
| 1569 | /* Special handling for the MIPS16 relocs, since they are made up |
| 1570 | reloc types with a large value. */ |
| 1571 | if (code == BFD_RELOC_MIPS16_JMP) |
| 1572 | return &elf_mips16_jump_howto; |
| 1573 | else if (code == BFD_RELOC_MIPS16_GPREL) |
| 1574 | return &elf_mips16_gprel_howto; |
| 1575 | /* start-sanitize-sky */ |
| 1576 | else if (code == BFD_RELOC_MIPS_DVP_11_PCREL) |
| 1577 | return &elf_mips_dvp_11_pcrel_howto; |
| 1578 | /* end-sanitize-sky */ |
| 1579 | |
| 1580 | return NULL; |
| 1581 | } |
| 1582 | |
| 1583 | /* Given a MIPS reloc type, fill in an arelent structure. */ |
| 1584 | |
| 1585 | static void |
| 1586 | mips_info_to_howto_rel (abfd, cache_ptr, dst) |
| 1587 | bfd *abfd; |
| 1588 | arelent *cache_ptr; |
| 1589 | Elf32_Internal_Rel *dst; |
| 1590 | { |
| 1591 | unsigned int r_type; |
| 1592 | |
| 1593 | r_type = ELF32_R_TYPE (dst->r_info); |
| 1594 | if (r_type == R_MIPS16_26) |
| 1595 | cache_ptr->howto = &elf_mips16_jump_howto; |
| 1596 | else if (r_type == R_MIPS16_GPREL) |
| 1597 | cache_ptr->howto = &elf_mips16_gprel_howto; |
| 1598 | /* start-sanitize-sky */ |
| 1599 | else if (r_type == R_MIPS_DVP_11_PCREL) |
| 1600 | cache_ptr->howto = &elf_mips_dvp_11_pcrel_howto; |
| 1601 | /* end-sanitize-sky */ |
| 1602 | else |
| 1603 | { |
| 1604 | BFD_ASSERT (r_type < (unsigned int) R_MIPS_max); |
| 1605 | cache_ptr->howto = &elf_mips_howto_table[r_type]; |
| 1606 | } |
| 1607 | |
| 1608 | /* The addend for a GPREL16 or LITERAL relocation comes from the GP |
| 1609 | value for the object file. We get the addend now, rather than |
| 1610 | when we do the relocation, because the symbol manipulations done |
| 1611 | by the linker may cause us to lose track of the input BFD. */ |
| 1612 | if (((*cache_ptr->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0 |
| 1613 | && (r_type == (unsigned int) R_MIPS_GPREL16 |
| 1614 | || r_type == (unsigned int) R_MIPS_LITERAL)) |
| 1615 | cache_ptr->addend = elf_gp (abfd); |
| 1616 | } |
| 1617 | \f |
| 1618 | /* A .reginfo section holds a single Elf32_RegInfo structure. These |
| 1619 | routines swap this structure in and out. They are used outside of |
| 1620 | BFD, so they are globally visible. */ |
| 1621 | |
| 1622 | void |
| 1623 | bfd_mips_elf32_swap_reginfo_in (abfd, ex, in) |
| 1624 | bfd *abfd; |
| 1625 | const Elf32_External_RegInfo *ex; |
| 1626 | Elf32_RegInfo *in; |
| 1627 | { |
| 1628 | in->ri_gprmask = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_gprmask); |
| 1629 | in->ri_cprmask[0] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[0]); |
| 1630 | in->ri_cprmask[1] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[1]); |
| 1631 | in->ri_cprmask[2] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[2]); |
| 1632 | in->ri_cprmask[3] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[3]); |
| 1633 | in->ri_gp_value = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_gp_value); |
| 1634 | } |
| 1635 | |
| 1636 | void |
| 1637 | bfd_mips_elf32_swap_reginfo_out (abfd, in, ex) |
| 1638 | bfd *abfd; |
| 1639 | const Elf32_RegInfo *in; |
| 1640 | Elf32_External_RegInfo *ex; |
| 1641 | { |
| 1642 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_gprmask, |
| 1643 | (bfd_byte *) ex->ri_gprmask); |
| 1644 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[0], |
| 1645 | (bfd_byte *) ex->ri_cprmask[0]); |
| 1646 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[1], |
| 1647 | (bfd_byte *) ex->ri_cprmask[1]); |
| 1648 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[2], |
| 1649 | (bfd_byte *) ex->ri_cprmask[2]); |
| 1650 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[3], |
| 1651 | (bfd_byte *) ex->ri_cprmask[3]); |
| 1652 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_gp_value, |
| 1653 | (bfd_byte *) ex->ri_gp_value); |
| 1654 | } |
| 1655 | |
| 1656 | /* In the 64 bit ABI, the .MIPS.options section holds register |
| 1657 | information in an Elf64_Reginfo structure. These routines swap |
| 1658 | them in and out. They are globally visible because they are used |
| 1659 | outside of BFD. These routines are here so that gas can call them |
| 1660 | without worrying about whether the 64 bit ABI has been included. */ |
| 1661 | |
| 1662 | void |
| 1663 | bfd_mips_elf64_swap_reginfo_in (abfd, ex, in) |
| 1664 | bfd *abfd; |
| 1665 | const Elf64_External_RegInfo *ex; |
| 1666 | Elf64_Internal_RegInfo *in; |
| 1667 | { |
| 1668 | in->ri_gprmask = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_gprmask); |
| 1669 | in->ri_pad = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_pad); |
| 1670 | in->ri_cprmask[0] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[0]); |
| 1671 | in->ri_cprmask[1] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[1]); |
| 1672 | in->ri_cprmask[2] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[2]); |
| 1673 | in->ri_cprmask[3] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[3]); |
| 1674 | in->ri_gp_value = bfd_h_get_64 (abfd, (bfd_byte *) ex->ri_gp_value); |
| 1675 | } |
| 1676 | |
| 1677 | void |
| 1678 | bfd_mips_elf64_swap_reginfo_out (abfd, in, ex) |
| 1679 | bfd *abfd; |
| 1680 | const Elf64_Internal_RegInfo *in; |
| 1681 | Elf64_External_RegInfo *ex; |
| 1682 | { |
| 1683 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_gprmask, |
| 1684 | (bfd_byte *) ex->ri_gprmask); |
| 1685 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_pad, |
| 1686 | (bfd_byte *) ex->ri_pad); |
| 1687 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[0], |
| 1688 | (bfd_byte *) ex->ri_cprmask[0]); |
| 1689 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[1], |
| 1690 | (bfd_byte *) ex->ri_cprmask[1]); |
| 1691 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[2], |
| 1692 | (bfd_byte *) ex->ri_cprmask[2]); |
| 1693 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[3], |
| 1694 | (bfd_byte *) ex->ri_cprmask[3]); |
| 1695 | bfd_h_put_64 (abfd, (bfd_vma) in->ri_gp_value, |
| 1696 | (bfd_byte *) ex->ri_gp_value); |
| 1697 | } |
| 1698 | |
| 1699 | /* Swap an entry in a .gptab section. Note that these routines rely |
| 1700 | on the equivalence of the two elements of the union. */ |
| 1701 | |
| 1702 | static void |
| 1703 | bfd_mips_elf32_swap_gptab_in (abfd, ex, in) |
| 1704 | bfd *abfd; |
| 1705 | const Elf32_External_gptab *ex; |
| 1706 | Elf32_gptab *in; |
| 1707 | { |
| 1708 | in->gt_entry.gt_g_value = bfd_h_get_32 (abfd, ex->gt_entry.gt_g_value); |
| 1709 | in->gt_entry.gt_bytes = bfd_h_get_32 (abfd, ex->gt_entry.gt_bytes); |
| 1710 | } |
| 1711 | |
| 1712 | static void |
| 1713 | bfd_mips_elf32_swap_gptab_out (abfd, in, ex) |
| 1714 | bfd *abfd; |
| 1715 | const Elf32_gptab *in; |
| 1716 | Elf32_External_gptab *ex; |
| 1717 | { |
| 1718 | bfd_h_put_32 (abfd, (bfd_vma) in->gt_entry.gt_g_value, |
| 1719 | ex->gt_entry.gt_g_value); |
| 1720 | bfd_h_put_32 (abfd, (bfd_vma) in->gt_entry.gt_bytes, |
| 1721 | ex->gt_entry.gt_bytes); |
| 1722 | } |
| 1723 | |
| 1724 | static void |
| 1725 | bfd_elf32_swap_compact_rel_out (abfd, in, ex) |
| 1726 | bfd *abfd; |
| 1727 | const Elf32_compact_rel *in; |
| 1728 | Elf32_External_compact_rel *ex; |
| 1729 | { |
| 1730 | bfd_h_put_32 (abfd, (bfd_vma) in->id1, ex->id1); |
| 1731 | bfd_h_put_32 (abfd, (bfd_vma) in->num, ex->num); |
| 1732 | bfd_h_put_32 (abfd, (bfd_vma) in->id2, ex->id2); |
| 1733 | bfd_h_put_32 (abfd, (bfd_vma) in->offset, ex->offset); |
| 1734 | bfd_h_put_32 (abfd, (bfd_vma) in->reserved0, ex->reserved0); |
| 1735 | bfd_h_put_32 (abfd, (bfd_vma) in->reserved1, ex->reserved1); |
| 1736 | } |
| 1737 | |
| 1738 | static void |
| 1739 | bfd_elf32_swap_crinfo_out (abfd, in, ex) |
| 1740 | bfd *abfd; |
| 1741 | const Elf32_crinfo *in; |
| 1742 | Elf32_External_crinfo *ex; |
| 1743 | { |
| 1744 | unsigned long l; |
| 1745 | |
| 1746 | l = (((in->ctype & CRINFO_CTYPE) << CRINFO_CTYPE_SH) |
| 1747 | | ((in->rtype & CRINFO_RTYPE) << CRINFO_RTYPE_SH) |
| 1748 | | ((in->dist2to & CRINFO_DIST2TO) << CRINFO_DIST2TO_SH) |
| 1749 | | ((in->relvaddr & CRINFO_RELVADDR) << CRINFO_RELVADDR_SH)); |
| 1750 | bfd_h_put_32 (abfd, (bfd_vma) l, ex->info); |
| 1751 | bfd_h_put_32 (abfd, (bfd_vma) in->konst, ex->konst); |
| 1752 | bfd_h_put_32 (abfd, (bfd_vma) in->vaddr, ex->vaddr); |
| 1753 | } |
| 1754 | |
| 1755 | /* Swap in an options header. */ |
| 1756 | |
| 1757 | void |
| 1758 | bfd_mips_elf_swap_options_in (abfd, ex, in) |
| 1759 | bfd *abfd; |
| 1760 | const Elf_External_Options *ex; |
| 1761 | Elf_Internal_Options *in; |
| 1762 | { |
| 1763 | in->kind = bfd_h_get_8 (abfd, ex->kind); |
| 1764 | in->size = bfd_h_get_8 (abfd, ex->size); |
| 1765 | in->section = bfd_h_get_16 (abfd, ex->section); |
| 1766 | in->info = bfd_h_get_32 (abfd, ex->info); |
| 1767 | } |
| 1768 | |
| 1769 | /* Swap out an options header. */ |
| 1770 | |
| 1771 | void |
| 1772 | bfd_mips_elf_swap_options_out (abfd, in, ex) |
| 1773 | bfd *abfd; |
| 1774 | const Elf_Internal_Options *in; |
| 1775 | Elf_External_Options *ex; |
| 1776 | { |
| 1777 | bfd_h_put_8 (abfd, in->kind, ex->kind); |
| 1778 | bfd_h_put_8 (abfd, in->size, ex->size); |
| 1779 | bfd_h_put_16 (abfd, in->section, ex->section); |
| 1780 | bfd_h_put_32 (abfd, in->info, ex->info); |
| 1781 | } |
| 1782 | \f |
| 1783 | /* Determine whether a symbol is global for the purposes of splitting |
| 1784 | the symbol table into global symbols and local symbols. At least |
| 1785 | on Irix 5, this split must be between section symbols and all other |
| 1786 | symbols. On most ELF targets the split is between static symbols |
| 1787 | and externally visible symbols. */ |
| 1788 | |
| 1789 | /*ARGSUSED*/ |
| 1790 | static boolean |
| 1791 | mips_elf_sym_is_global (abfd, sym) |
| 1792 | bfd *abfd; |
| 1793 | asymbol *sym; |
| 1794 | { |
| 1795 | return (sym->flags & BSF_SECTION_SYM) == 0 ? true : false; |
| 1796 | } |
| 1797 | \f |
| 1798 | /* Set the right machine number for a MIPS ELF file. This is used for |
| 1799 | both the 32-bit and the 64-bit ABI. */ |
| 1800 | |
| 1801 | boolean |
| 1802 | _bfd_mips_elf_object_p (abfd) |
| 1803 | bfd *abfd; |
| 1804 | { |
| 1805 | switch (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) |
| 1806 | { |
| 1807 | default: |
| 1808 | case E_MIPS_ARCH_1: |
| 1809 | (void) bfd_default_set_arch_mach (abfd, bfd_arch_mips, 3000); |
| 1810 | break; |
| 1811 | |
| 1812 | case E_MIPS_ARCH_2: |
| 1813 | (void) bfd_default_set_arch_mach (abfd, bfd_arch_mips, 6000); |
| 1814 | break; |
| 1815 | |
| 1816 | case E_MIPS_ARCH_3: |
| 1817 | (void) bfd_default_set_arch_mach (abfd, bfd_arch_mips, 4000); |
| 1818 | break; |
| 1819 | |
| 1820 | case E_MIPS_ARCH_4: |
| 1821 | (void) bfd_default_set_arch_mach (abfd, bfd_arch_mips, 8000); |
| 1822 | break; |
| 1823 | } |
| 1824 | |
| 1825 | return true; |
| 1826 | } |
| 1827 | |
| 1828 | /* Set the right machine number for a 32-bit MIPS ELF file. */ |
| 1829 | |
| 1830 | static boolean |
| 1831 | mips_elf32_object_p (abfd) |
| 1832 | bfd *abfd; |
| 1833 | { |
| 1834 | /* Irix 5 is broken. Object file symbol tables are not always |
| 1835 | sorted correctly such that local symbols precede global symbols, |
| 1836 | and the sh_info field in the symbol table is not always right. */ |
| 1837 | elf_bad_symtab (abfd) = true; |
| 1838 | |
| 1839 | return _bfd_mips_elf_object_p (abfd); |
| 1840 | } |
| 1841 | |
| 1842 | /* The final processing done just before writing out a MIPS ELF object |
| 1843 | file. This gets the MIPS architecture right based on the machine |
| 1844 | number. This is used by both the 32-bit and the 64-bit ABI. */ |
| 1845 | |
| 1846 | /*ARGSUSED*/ |
| 1847 | void |
| 1848 | _bfd_mips_elf_final_write_processing (abfd, linker) |
| 1849 | bfd *abfd; |
| 1850 | boolean linker; |
| 1851 | { |
| 1852 | unsigned long val; |
| 1853 | unsigned int i; |
| 1854 | Elf_Internal_Shdr **hdrpp; |
| 1855 | const char *name; |
| 1856 | asection *sec; |
| 1857 | |
| 1858 | switch (bfd_get_mach (abfd)) |
| 1859 | { |
| 1860 | case 3000: |
| 1861 | val = E_MIPS_ARCH_1; |
| 1862 | break; |
| 1863 | |
| 1864 | case 6000: |
| 1865 | val = E_MIPS_ARCH_2; |
| 1866 | break; |
| 1867 | |
| 1868 | case 4000: |
| 1869 | val = E_MIPS_ARCH_3; |
| 1870 | break; |
| 1871 | |
| 1872 | case 8000: |
| 1873 | val = E_MIPS_ARCH_4; |
| 1874 | break; |
| 1875 | |
| 1876 | default: |
| 1877 | val = 0; |
| 1878 | break; |
| 1879 | } |
| 1880 | |
| 1881 | elf_elfheader (abfd)->e_flags &=~ EF_MIPS_ARCH; |
| 1882 | elf_elfheader (abfd)->e_flags |= val; |
| 1883 | |
| 1884 | /* Set the sh_info field for .gptab sections. */ |
| 1885 | for (i = 1, hdrpp = elf_elfsections (abfd) + 1; |
| 1886 | i < elf_elfheader (abfd)->e_shnum; |
| 1887 | i++, hdrpp++) |
| 1888 | { |
| 1889 | switch ((*hdrpp)->sh_type) |
| 1890 | { |
| 1891 | case SHT_MIPS_LIBLIST: |
| 1892 | sec = bfd_get_section_by_name (abfd, ".dynstr"); |
| 1893 | if (sec != NULL) |
| 1894 | (*hdrpp)->sh_link = elf_section_data (sec)->this_idx; |
| 1895 | break; |
| 1896 | |
| 1897 | case SHT_MIPS_GPTAB: |
| 1898 | BFD_ASSERT ((*hdrpp)->bfd_section != NULL); |
| 1899 | name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section); |
| 1900 | BFD_ASSERT (name != NULL |
| 1901 | && strncmp (name, ".gptab.", sizeof ".gptab." - 1) == 0); |
| 1902 | sec = bfd_get_section_by_name (abfd, name + sizeof ".gptab" - 1); |
| 1903 | BFD_ASSERT (sec != NULL); |
| 1904 | (*hdrpp)->sh_info = elf_section_data (sec)->this_idx; |
| 1905 | break; |
| 1906 | |
| 1907 | case SHT_MIPS_CONTENT: |
| 1908 | BFD_ASSERT ((*hdrpp)->bfd_section != NULL); |
| 1909 | name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section); |
| 1910 | BFD_ASSERT (name != NULL |
| 1911 | && strncmp (name, ".MIPS.content", |
| 1912 | sizeof ".MIPS.content" - 1) == 0); |
| 1913 | sec = bfd_get_section_by_name (abfd, |
| 1914 | name + sizeof ".MIPS.content" - 1); |
| 1915 | BFD_ASSERT (sec != NULL); |
| 1916 | (*hdrpp)->sh_info = elf_section_data (sec)->this_idx; |
| 1917 | break; |
| 1918 | |
| 1919 | case SHT_MIPS_SYMBOL_LIB: |
| 1920 | sec = bfd_get_section_by_name (abfd, ".dynsym"); |
| 1921 | if (sec != NULL) |
| 1922 | (*hdrpp)->sh_link = elf_section_data (sec)->this_idx; |
| 1923 | sec = bfd_get_section_by_name (abfd, ".liblist"); |
| 1924 | if (sec != NULL) |
| 1925 | (*hdrpp)->sh_info = elf_section_data (sec)->this_idx; |
| 1926 | break; |
| 1927 | |
| 1928 | case SHT_MIPS_EVENTS: |
| 1929 | BFD_ASSERT ((*hdrpp)->bfd_section != NULL); |
| 1930 | name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section); |
| 1931 | BFD_ASSERT (name != NULL); |
| 1932 | if (strncmp (name, ".MIPS.events", sizeof ".MIPS.events" - 1) == 0) |
| 1933 | sec = bfd_get_section_by_name (abfd, |
| 1934 | name + sizeof ".MIPS.events" - 1); |
| 1935 | else |
| 1936 | { |
| 1937 | BFD_ASSERT (strncmp (name, ".MIPS.post_rel", |
| 1938 | sizeof ".MIPS.post_rel" - 1) == 0); |
| 1939 | sec = bfd_get_section_by_name (abfd, |
| 1940 | (name |
| 1941 | + sizeof ".MIPS.post_rel" - 1)); |
| 1942 | } |
| 1943 | BFD_ASSERT (sec != NULL); |
| 1944 | (*hdrpp)->sh_link = elf_section_data (sec)->this_idx; |
| 1945 | break; |
| 1946 | } |
| 1947 | } |
| 1948 | } |
| 1949 | \f |
| 1950 | /* Function to keep MIPS specific file flags like as EF_MIPS_PIC. */ |
| 1951 | |
| 1952 | boolean |
| 1953 | _bfd_mips_elf_set_private_flags (abfd, flags) |
| 1954 | bfd *abfd; |
| 1955 | flagword flags; |
| 1956 | { |
| 1957 | BFD_ASSERT (!elf_flags_init (abfd) |
| 1958 | || elf_elfheader (abfd)->e_flags == flags); |
| 1959 | |
| 1960 | elf_elfheader (abfd)->e_flags = flags; |
| 1961 | elf_flags_init (abfd) = true; |
| 1962 | return true; |
| 1963 | } |
| 1964 | |
| 1965 | /* Copy backend specific data from one object module to another */ |
| 1966 | |
| 1967 | boolean |
| 1968 | _bfd_mips_elf_copy_private_bfd_data (ibfd, obfd) |
| 1969 | bfd *ibfd; |
| 1970 | bfd *obfd; |
| 1971 | { |
| 1972 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 1973 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 1974 | return true; |
| 1975 | |
| 1976 | BFD_ASSERT (!elf_flags_init (obfd) |
| 1977 | || (elf_elfheader (obfd)->e_flags |
| 1978 | == elf_elfheader (ibfd)->e_flags)); |
| 1979 | |
| 1980 | elf_gp (obfd) = elf_gp (ibfd); |
| 1981 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; |
| 1982 | elf_flags_init (obfd) = true; |
| 1983 | return true; |
| 1984 | } |
| 1985 | |
| 1986 | /* Merge backend specific data from an object file to the output |
| 1987 | object file when linking. */ |
| 1988 | |
| 1989 | boolean |
| 1990 | _bfd_mips_elf_merge_private_bfd_data (ibfd, obfd) |
| 1991 | bfd *ibfd; |
| 1992 | bfd *obfd; |
| 1993 | { |
| 1994 | flagword old_flags; |
| 1995 | flagword new_flags; |
| 1996 | boolean ok; |
| 1997 | |
| 1998 | /* Check if we have the same endianess */ |
| 1999 | if (ibfd->xvec->byteorder != obfd->xvec->byteorder |
| 2000 | && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN) |
| 2001 | { |
| 2002 | (*_bfd_error_handler) |
| 2003 | ("%s: compiled for a %s endian system and target is %s endian", |
| 2004 | bfd_get_filename (ibfd), |
| 2005 | bfd_big_endian (ibfd) ? "big" : "little", |
| 2006 | bfd_big_endian (obfd) ? "big" : "little"); |
| 2007 | |
| 2008 | bfd_set_error (bfd_error_wrong_format); |
| 2009 | return false; |
| 2010 | } |
| 2011 | |
| 2012 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 2013 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 2014 | return true; |
| 2015 | |
| 2016 | new_flags = elf_elfheader (ibfd)->e_flags; |
| 2017 | elf_elfheader (obfd)->e_flags |= new_flags & EF_MIPS_NOREORDER; |
| 2018 | old_flags = elf_elfheader (obfd)->e_flags; |
| 2019 | |
| 2020 | if (! elf_flags_init (obfd)) |
| 2021 | { |
| 2022 | elf_flags_init (obfd) = true; |
| 2023 | elf_elfheader (obfd)->e_flags = new_flags; |
| 2024 | |
| 2025 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
| 2026 | && bfd_get_arch_info (obfd)->the_default) |
| 2027 | { |
| 2028 | if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), |
| 2029 | bfd_get_mach (ibfd))) |
| 2030 | return false; |
| 2031 | } |
| 2032 | |
| 2033 | return true; |
| 2034 | } |
| 2035 | |
| 2036 | /* Check flag compatibility. */ |
| 2037 | |
| 2038 | new_flags &= ~EF_MIPS_NOREORDER; |
| 2039 | old_flags &= ~EF_MIPS_NOREORDER; |
| 2040 | |
| 2041 | if (new_flags == old_flags) |
| 2042 | return true; |
| 2043 | |
| 2044 | ok = true; |
| 2045 | |
| 2046 | if ((new_flags & EF_MIPS_PIC) != (old_flags & EF_MIPS_PIC)) |
| 2047 | { |
| 2048 | new_flags &= ~EF_MIPS_PIC; |
| 2049 | old_flags &= ~EF_MIPS_PIC; |
| 2050 | (*_bfd_error_handler) |
| 2051 | ("%s: linking PIC files with non-PIC files", |
| 2052 | bfd_get_filename (ibfd)); |
| 2053 | ok = false; |
| 2054 | } |
| 2055 | |
| 2056 | if ((new_flags & EF_MIPS_CPIC) != (old_flags & EF_MIPS_CPIC)) |
| 2057 | { |
| 2058 | new_flags &= ~EF_MIPS_CPIC; |
| 2059 | old_flags &= ~EF_MIPS_CPIC; |
| 2060 | (*_bfd_error_handler) |
| 2061 | ("%s: linking abicalls files with non-abicalls files", |
| 2062 | bfd_get_filename (ibfd)); |
| 2063 | ok = false; |
| 2064 | } |
| 2065 | |
| 2066 | /* Don't warn about mixing -mips1 and -mips2 code, or mixing -mips3 |
| 2067 | and -mips4 code. They will normally use the same data sizes and |
| 2068 | calling conventions. */ |
| 2069 | if ((new_flags & EF_MIPS_ARCH) != (old_flags & EF_MIPS_ARCH)) |
| 2070 | { |
| 2071 | int new_isa, old_isa; |
| 2072 | |
| 2073 | new_isa = elf_mips_isa (new_flags); |
| 2074 | old_isa = elf_mips_isa (old_flags); |
| 2075 | if ((new_isa == 1 || new_isa == 2) |
| 2076 | ? (old_isa != 1 && old_isa != 2) |
| 2077 | : (old_isa == 1 || old_isa == 2)) |
| 2078 | { |
| 2079 | (*_bfd_error_handler) |
| 2080 | ("%s: ISA mismatch (-mips%d) with previous modules (-mips%d)", |
| 2081 | bfd_get_filename (ibfd), new_isa, old_isa); |
| 2082 | ok = false; |
| 2083 | } |
| 2084 | |
| 2085 | new_flags &= ~ EF_MIPS_ARCH; |
| 2086 | old_flags &= ~ EF_MIPS_ARCH; |
| 2087 | } |
| 2088 | |
| 2089 | /* Warn about any other mismatches */ |
| 2090 | if (new_flags != old_flags) |
| 2091 | { |
| 2092 | (*_bfd_error_handler) |
| 2093 | ("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)", |
| 2094 | bfd_get_filename (ibfd), (unsigned long) new_flags, |
| 2095 | (unsigned long) old_flags); |
| 2096 | ok = false; |
| 2097 | } |
| 2098 | |
| 2099 | if (! ok) |
| 2100 | { |
| 2101 | bfd_set_error (bfd_error_bad_value); |
| 2102 | return false; |
| 2103 | } |
| 2104 | |
| 2105 | return true; |
| 2106 | } |
| 2107 | \f |
| 2108 | /* Handle a MIPS specific section when reading an object file. This |
| 2109 | is called when elfcode.h finds a section with an unknown type. |
| 2110 | This routine supports both the 32-bit and 64-bit ELF ABI. |
| 2111 | |
| 2112 | FIXME: We need to handle the SHF_MIPS_GPREL flag, but I'm not sure |
| 2113 | how to. */ |
| 2114 | |
| 2115 | boolean |
| 2116 | _bfd_mips_elf_section_from_shdr (abfd, hdr, name) |
| 2117 | bfd *abfd; |
| 2118 | Elf_Internal_Shdr *hdr; |
| 2119 | const char *name; |
| 2120 | { |
| 2121 | /* There ought to be a place to keep ELF backend specific flags, but |
| 2122 | at the moment there isn't one. We just keep track of the |
| 2123 | sections by their name, instead. Fortunately, the ABI gives |
| 2124 | suggested names for all the MIPS specific sections, so we will |
| 2125 | probably get away with this. */ |
| 2126 | switch (hdr->sh_type) |
| 2127 | { |
| 2128 | case SHT_MIPS_LIBLIST: |
| 2129 | if (strcmp (name, ".liblist") != 0) |
| 2130 | return false; |
| 2131 | break; |
| 2132 | case SHT_MIPS_MSYM: |
| 2133 | if (strcmp (name, ".msym") != 0) |
| 2134 | return false; |
| 2135 | break; |
| 2136 | case SHT_MIPS_CONFLICT: |
| 2137 | if (strcmp (name, ".conflict") != 0) |
| 2138 | return false; |
| 2139 | break; |
| 2140 | case SHT_MIPS_GPTAB: |
| 2141 | if (strncmp (name, ".gptab.", sizeof ".gptab." - 1) != 0) |
| 2142 | return false; |
| 2143 | break; |
| 2144 | case SHT_MIPS_UCODE: |
| 2145 | if (strcmp (name, ".ucode") != 0) |
| 2146 | return false; |
| 2147 | break; |
| 2148 | case SHT_MIPS_DEBUG: |
| 2149 | if (strcmp (name, ".mdebug") != 0) |
| 2150 | return false; |
| 2151 | break; |
| 2152 | case SHT_MIPS_REGINFO: |
| 2153 | if (strcmp (name, ".reginfo") != 0 |
| 2154 | || hdr->sh_size != sizeof (Elf32_External_RegInfo)) |
| 2155 | return false; |
| 2156 | break; |
| 2157 | case SHT_MIPS_IFACE: |
| 2158 | if (strcmp (name, ".MIPS.interfaces") != 0) |
| 2159 | return false; |
| 2160 | break; |
| 2161 | case SHT_MIPS_CONTENT: |
| 2162 | if (strncmp (name, ".MIPS.content", sizeof ".MIPS.content" - 1) != 0) |
| 2163 | return false; |
| 2164 | break; |
| 2165 | case SHT_MIPS_OPTIONS: |
| 2166 | if (strcmp (name, ".options") != 0 |
| 2167 | && strcmp (name, ".MIPS.options") != 0) |
| 2168 | return false; |
| 2169 | break; |
| 2170 | case SHT_MIPS_DWARF: |
| 2171 | if (strncmp (name, ".debug_", sizeof ".debug_" - 1) != 0) |
| 2172 | return false; |
| 2173 | break; |
| 2174 | case SHT_MIPS_SYMBOL_LIB: |
| 2175 | if (strcmp (name, ".MIPS.symlib") != 0) |
| 2176 | return false; |
| 2177 | break; |
| 2178 | case SHT_MIPS_EVENTS: |
| 2179 | if (strncmp (name, ".MIPS.events", sizeof ".MIPS.events" - 1) != 0 |
| 2180 | && strncmp (name, ".MIPS.post_rel", |
| 2181 | sizeof ".MIPS.post_rel" - 1) != 0) |
| 2182 | return false; |
| 2183 | break; |
| 2184 | default: |
| 2185 | return false; |
| 2186 | } |
| 2187 | |
| 2188 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) |
| 2189 | return false; |
| 2190 | |
| 2191 | if (hdr->sh_type == SHT_MIPS_DEBUG) |
| 2192 | { |
| 2193 | if (! bfd_set_section_flags (abfd, hdr->bfd_section, |
| 2194 | (bfd_get_section_flags (abfd, |
| 2195 | hdr->bfd_section) |
| 2196 | | SEC_DEBUGGING))) |
| 2197 | return false; |
| 2198 | } |
| 2199 | |
| 2200 | return true; |
| 2201 | } |
| 2202 | |
| 2203 | /* Handle a 32-bit MIPS ELF specific section. */ |
| 2204 | |
| 2205 | static boolean |
| 2206 | mips_elf32_section_from_shdr (abfd, hdr, name) |
| 2207 | bfd *abfd; |
| 2208 | Elf_Internal_Shdr *hdr; |
| 2209 | char *name; |
| 2210 | { |
| 2211 | if (! _bfd_mips_elf_section_from_shdr (abfd, hdr, name)) |
| 2212 | return false; |
| 2213 | |
| 2214 | /* FIXME: We should record sh_info for a .gptab section. */ |
| 2215 | |
| 2216 | /* For a .reginfo section, set the gp value in the tdata information |
| 2217 | from the contents of this section. We need the gp value while |
| 2218 | processing relocs, so we just get it now. The .reginfo section |
| 2219 | is not used in the 64-bit MIPS ELF ABI. */ |
| 2220 | if (hdr->sh_type == SHT_MIPS_REGINFO) |
| 2221 | { |
| 2222 | Elf32_External_RegInfo ext; |
| 2223 | Elf32_RegInfo s; |
| 2224 | |
| 2225 | if (! bfd_get_section_contents (abfd, hdr->bfd_section, (PTR) &ext, |
| 2226 | (file_ptr) 0, sizeof ext)) |
| 2227 | return false; |
| 2228 | bfd_mips_elf32_swap_reginfo_in (abfd, &ext, &s); |
| 2229 | elf_gp (abfd) = s.ri_gp_value; |
| 2230 | } |
| 2231 | |
| 2232 | /* For a SHT_MIPS_OPTIONS section, look for a ODK_REGINFO entry, and |
| 2233 | set the gp value based on what we find. We may see both |
| 2234 | SHT_MIPS_REGINFO and SHT_MIPS_OPTIONS/ODK_REGINFO; in that case, |
| 2235 | they should agree. */ |
| 2236 | if (hdr->sh_type == SHT_MIPS_OPTIONS) |
| 2237 | { |
| 2238 | bfd_byte *contents, *l, *lend; |
| 2239 | |
| 2240 | contents = (bfd_byte *) bfd_malloc (hdr->sh_size); |
| 2241 | if (contents == NULL) |
| 2242 | return false; |
| 2243 | if (! bfd_get_section_contents (abfd, hdr->bfd_section, contents, |
| 2244 | (file_ptr) 0, hdr->sh_size)) |
| 2245 | { |
| 2246 | free (contents); |
| 2247 | return false; |
| 2248 | } |
| 2249 | l = contents; |
| 2250 | lend = contents + hdr->sh_size; |
| 2251 | while (l + sizeof (Elf_External_Options) <= lend) |
| 2252 | { |
| 2253 | Elf_Internal_Options intopt; |
| 2254 | |
| 2255 | bfd_mips_elf_swap_options_in (abfd, (Elf_External_Options *) l, |
| 2256 | &intopt); |
| 2257 | if (intopt.kind == ODK_REGINFO) |
| 2258 | { |
| 2259 | Elf32_RegInfo intreg; |
| 2260 | |
| 2261 | bfd_mips_elf32_swap_reginfo_in |
| 2262 | (abfd, |
| 2263 | ((Elf32_External_RegInfo *) |
| 2264 | (l + sizeof (Elf_External_Options))), |
| 2265 | &intreg); |
| 2266 | elf_gp (abfd) = intreg.ri_gp_value; |
| 2267 | } |
| 2268 | l += intopt.size; |
| 2269 | } |
| 2270 | free (contents); |
| 2271 | } |
| 2272 | |
| 2273 | return true; |
| 2274 | } |
| 2275 | |
| 2276 | /* Set the correct type for a MIPS ELF section. We do this by the |
| 2277 | section name, which is a hack, but ought to work. This routine is |
| 2278 | used by both the 32-bit and the 64-bit ABI. */ |
| 2279 | |
| 2280 | boolean |
| 2281 | _bfd_mips_elf_fake_sections (abfd, hdr, sec) |
| 2282 | bfd *abfd; |
| 2283 | Elf32_Internal_Shdr *hdr; |
| 2284 | asection *sec; |
| 2285 | { |
| 2286 | register const char *name; |
| 2287 | |
| 2288 | name = bfd_get_section_name (abfd, sec); |
| 2289 | |
| 2290 | if (strcmp (name, ".liblist") == 0) |
| 2291 | { |
| 2292 | hdr->sh_type = SHT_MIPS_LIBLIST; |
| 2293 | hdr->sh_info = sec->_raw_size / sizeof (Elf32_Lib); |
| 2294 | /* The sh_link field is set in final_write_processing. */ |
| 2295 | } |
| 2296 | else if (strcmp (name, ".msym") == 0) |
| 2297 | { |
| 2298 | hdr->sh_type = SHT_MIPS_MSYM; |
| 2299 | hdr->sh_entsize = 8; |
| 2300 | /* FIXME: Set the sh_info field. */ |
| 2301 | } |
| 2302 | else if (strcmp (name, ".conflict") == 0) |
| 2303 | hdr->sh_type = SHT_MIPS_CONFLICT; |
| 2304 | else if (strncmp (name, ".gptab.", sizeof ".gptab." - 1) == 0) |
| 2305 | { |
| 2306 | hdr->sh_type = SHT_MIPS_GPTAB; |
| 2307 | hdr->sh_entsize = sizeof (Elf32_External_gptab); |
| 2308 | /* The sh_info field is set in final_write_processing. */ |
| 2309 | } |
| 2310 | else if (strcmp (name, ".ucode") == 0) |
| 2311 | hdr->sh_type = SHT_MIPS_UCODE; |
| 2312 | else if (strcmp (name, ".mdebug") == 0) |
| 2313 | { |
| 2314 | hdr->sh_type = SHT_MIPS_DEBUG; |
| 2315 | /* In a shared object on Irix 5.3, the .mdebug section has an |
| 2316 | entsize of 0. FIXME: Does this matter? */ |
| 2317 | if (SGI_COMPAT (abfd) && (abfd->flags & DYNAMIC) != 0) |
| 2318 | hdr->sh_entsize = 0; |
| 2319 | else |
| 2320 | hdr->sh_entsize = 1; |
| 2321 | } |
| 2322 | else if (strcmp (name, ".reginfo") == 0) |
| 2323 | { |
| 2324 | hdr->sh_type = SHT_MIPS_REGINFO; |
| 2325 | /* In a shared object on Irix 5.3, the .reginfo section has an |
| 2326 | entsize of 0x18. FIXME: Does this matter? */ |
| 2327 | if (SGI_COMPAT (abfd) && (abfd->flags & DYNAMIC) != 0) |
| 2328 | hdr->sh_entsize = sizeof (Elf32_External_RegInfo); |
| 2329 | else |
| 2330 | hdr->sh_entsize = 1; |
| 2331 | |
| 2332 | /* Force the section size to the correct value, even if the |
| 2333 | linker thinks it is larger. The link routine below will only |
| 2334 | write out this much data for .reginfo. */ |
| 2335 | hdr->sh_size = sec->_raw_size = sizeof (Elf32_External_RegInfo); |
| 2336 | } |
| 2337 | else if (SGI_COMPAT (abfd) |
| 2338 | && (strcmp (name, ".hash") == 0 |
| 2339 | || strcmp (name, ".dynamic") == 0 |
| 2340 | || strcmp (name, ".dynstr") == 0)) |
| 2341 | { |
| 2342 | hdr->sh_entsize = 0; |
| 2343 | hdr->sh_info = SIZEOF_MIPS_DYNSYM_SECNAMES; |
| 2344 | } |
| 2345 | else if (strcmp (name, ".got") == 0 |
| 2346 | || strcmp (name, ".sdata") == 0 |
| 2347 | || strcmp (name, ".sbss") == 0 |
| 2348 | || strcmp (name, ".lit4") == 0 |
| 2349 | || strcmp (name, ".lit8") == 0) |
| 2350 | hdr->sh_flags |= SHF_MIPS_GPREL; |
| 2351 | else if (strcmp (name, ".MIPS.interfaces") == 0) |
| 2352 | { |
| 2353 | hdr->sh_type = SHT_MIPS_IFACE; |
| 2354 | hdr->sh_flags |= SHF_MIPS_NOSTRIP; |
| 2355 | } |
| 2356 | else if (strcmp (name, ".MIPS.content") == 0) |
| 2357 | { |
| 2358 | hdr->sh_type = SHT_MIPS_CONTENT; |
| 2359 | /* The sh_info field is set in final_write_processing. */ |
| 2360 | } |
| 2361 | else if (strcmp (name, ".options") == 0 |
| 2362 | || strcmp (name, ".MIPS.options") == 0) |
| 2363 | { |
| 2364 | hdr->sh_type = SHT_MIPS_OPTIONS; |
| 2365 | hdr->sh_entsize = 1; |
| 2366 | hdr->sh_flags |= SHF_MIPS_NOSTRIP; |
| 2367 | } |
| 2368 | else if (strncmp (name, ".debug_", sizeof ".debug_" - 1) == 0) |
| 2369 | hdr->sh_type = SHT_MIPS_DWARF; |
| 2370 | else if (strcmp (name, ".MIPS.symlib") == 0) |
| 2371 | { |
| 2372 | hdr->sh_type = SHT_MIPS_SYMBOL_LIB; |
| 2373 | /* The sh_link and sh_info fields are set in |
| 2374 | final_write_processing. */ |
| 2375 | } |
| 2376 | else if (strncmp (name, ".MIPS.events", sizeof ".MIPS.events" - 1) == 0 |
| 2377 | || strncmp (name, ".MIPS.post_rel", |
| 2378 | sizeof ".MIPS.post_rel" - 1) == 0) |
| 2379 | { |
| 2380 | hdr->sh_type = SHT_MIPS_EVENTS; |
| 2381 | hdr->sh_flags |= SHF_MIPS_NOSTRIP; |
| 2382 | /* The sh_link field is set in final_write_processing. */ |
| 2383 | } |
| 2384 | |
| 2385 | return true; |
| 2386 | } |
| 2387 | |
| 2388 | /* Given a BFD section, try to locate the corresponding ELF section |
| 2389 | index. This is used by both the 32-bit and the 64-bit ABI. |
| 2390 | Actually, it's not clear to me that the 64-bit ABI supports these, |
| 2391 | but for non-PIC objects we will certainly want support for at least |
| 2392 | the .scommon section. */ |
| 2393 | |
| 2394 | boolean |
| 2395 | _bfd_mips_elf_section_from_bfd_section (abfd, hdr, sec, retval) |
| 2396 | bfd *abfd; |
| 2397 | Elf32_Internal_Shdr *hdr; |
| 2398 | asection *sec; |
| 2399 | int *retval; |
| 2400 | { |
| 2401 | if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0) |
| 2402 | { |
| 2403 | *retval = SHN_MIPS_SCOMMON; |
| 2404 | return true; |
| 2405 | } |
| 2406 | if (strcmp (bfd_get_section_name (abfd, sec), ".acommon") == 0) |
| 2407 | { |
| 2408 | *retval = SHN_MIPS_ACOMMON; |
| 2409 | return true; |
| 2410 | } |
| 2411 | return false; |
| 2412 | } |
| 2413 | |
| 2414 | /* When are writing out the .options or .MIPS.options section, |
| 2415 | remember the bytes we are writing out, so that we can install the |
| 2416 | GP value in the section_processing routine. */ |
| 2417 | |
| 2418 | boolean |
| 2419 | _bfd_mips_elf_set_section_contents (abfd, section, location, offset, count) |
| 2420 | bfd *abfd; |
| 2421 | sec_ptr section; |
| 2422 | PTR location; |
| 2423 | file_ptr offset; |
| 2424 | bfd_size_type count; |
| 2425 | { |
| 2426 | if (strcmp (section->name, ".options") == 0 |
| 2427 | || strcmp (section->name, ".MIPS.options") == 0) |
| 2428 | { |
| 2429 | bfd_byte *c; |
| 2430 | |
| 2431 | if (elf_section_data (section) == NULL) |
| 2432 | { |
| 2433 | section->used_by_bfd = |
| 2434 | (PTR) bfd_zalloc (abfd, sizeof (struct bfd_elf_section_data)); |
| 2435 | if (elf_section_data (section) == NULL) |
| 2436 | return false; |
| 2437 | } |
| 2438 | c = (bfd_byte *) elf_section_data (section)->tdata; |
| 2439 | if (c == NULL) |
| 2440 | { |
| 2441 | bfd_size_type size; |
| 2442 | |
| 2443 | if (section->_cooked_size != 0) |
| 2444 | size = section->_cooked_size; |
| 2445 | else |
| 2446 | size = section->_raw_size; |
| 2447 | c = (bfd_byte *) bfd_zalloc (abfd, size); |
| 2448 | if (c == NULL) |
| 2449 | return false; |
| 2450 | elf_section_data (section)->tdata = (PTR) c; |
| 2451 | } |
| 2452 | |
| 2453 | memcpy (c + offset, location, count); |
| 2454 | } |
| 2455 | |
| 2456 | return _bfd_elf_set_section_contents (abfd, section, location, offset, |
| 2457 | count); |
| 2458 | } |
| 2459 | |
| 2460 | /* Work over a section just before writing it out. This routine is |
| 2461 | used by both the 32-bit and the 64-bit ABI. FIXME: We recognize |
| 2462 | sections that need the SHF_MIPS_GPREL flag by name; there has to be |
| 2463 | a better way. */ |
| 2464 | |
| 2465 | boolean |
| 2466 | _bfd_mips_elf_section_processing (abfd, hdr) |
| 2467 | bfd *abfd; |
| 2468 | Elf_Internal_Shdr *hdr; |
| 2469 | { |
| 2470 | if (hdr->bfd_section != NULL) |
| 2471 | { |
| 2472 | const char *name = bfd_get_section_name (abfd, hdr->bfd_section); |
| 2473 | |
| 2474 | if (strcmp (name, ".sdata") == 0) |
| 2475 | { |
| 2476 | hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; |
| 2477 | hdr->sh_type = SHT_PROGBITS; |
| 2478 | } |
| 2479 | else if (strcmp (name, ".sbss") == 0) |
| 2480 | { |
| 2481 | hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; |
| 2482 | hdr->sh_type = SHT_NOBITS; |
| 2483 | } |
| 2484 | else if (strcmp (name, ".lit8") == 0 |
| 2485 | || strcmp (name, ".lit4") == 0) |
| 2486 | { |
| 2487 | hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; |
| 2488 | hdr->sh_type = SHT_PROGBITS; |
| 2489 | } |
| 2490 | else if (strcmp (name, ".compact_rel") == 0) |
| 2491 | { |
| 2492 | hdr->sh_flags = 0; |
| 2493 | hdr->sh_type = SHT_PROGBITS; |
| 2494 | } |
| 2495 | else if (strcmp (name, ".rtproc") == 0) |
| 2496 | { |
| 2497 | if (hdr->sh_addralign != 0 && hdr->sh_entsize == 0) |
| 2498 | { |
| 2499 | unsigned int adjust; |
| 2500 | |
| 2501 | adjust = hdr->sh_size % hdr->sh_addralign; |
| 2502 | if (adjust != 0) |
| 2503 | hdr->sh_size += hdr->sh_addralign - adjust; |
| 2504 | } |
| 2505 | } |
| 2506 | } |
| 2507 | |
| 2508 | return true; |
| 2509 | } |
| 2510 | |
| 2511 | /* Work over a section just before writing it out. We update the GP |
| 2512 | value in the SHT_MIPS_REGINFO and SHT_MIPS_OPTIONS sections based |
| 2513 | on the value we are using. */ |
| 2514 | |
| 2515 | static boolean |
| 2516 | mips_elf32_section_processing (abfd, hdr) |
| 2517 | bfd *abfd; |
| 2518 | Elf32_Internal_Shdr *hdr; |
| 2519 | { |
| 2520 | if (hdr->sh_type == SHT_MIPS_REGINFO) |
| 2521 | { |
| 2522 | bfd_byte buf[4]; |
| 2523 | |
| 2524 | BFD_ASSERT (hdr->sh_size == sizeof (Elf32_External_RegInfo)); |
| 2525 | BFD_ASSERT (hdr->contents == NULL); |
| 2526 | |
| 2527 | if (bfd_seek (abfd, |
| 2528 | hdr->sh_offset + sizeof (Elf32_External_RegInfo) - 4, |
| 2529 | SEEK_SET) == -1) |
| 2530 | return false; |
| 2531 | bfd_h_put_32 (abfd, (bfd_vma) elf_gp (abfd), buf); |
| 2532 | if (bfd_write (buf, (bfd_size_type) 1, (bfd_size_type) 4, abfd) != 4) |
| 2533 | return false; |
| 2534 | } |
| 2535 | |
| 2536 | if (hdr->sh_type == SHT_MIPS_OPTIONS |
| 2537 | && hdr->bfd_section != NULL |
| 2538 | && elf_section_data (hdr->bfd_section) != NULL |
| 2539 | && elf_section_data (hdr->bfd_section)->tdata != NULL) |
| 2540 | { |
| 2541 | bfd_byte *contents, *l, *lend; |
| 2542 | |
| 2543 | /* We stored the section contents in the elf_section_data tdata |
| 2544 | field in the set_section_contents routine. We save the |
| 2545 | section contents so that we don't have to read them again. |
| 2546 | At this point we know that elf_gp is set, so we can look |
| 2547 | through the section contents to see if there is an |
| 2548 | ODK_REGINFO structure. */ |
| 2549 | |
| 2550 | contents = (bfd_byte *) elf_section_data (hdr->bfd_section)->tdata; |
| 2551 | l = contents; |
| 2552 | lend = contents + hdr->sh_size; |
| 2553 | while (l + sizeof (Elf_External_Options) <= lend) |
| 2554 | { |
| 2555 | Elf_Internal_Options intopt; |
| 2556 | |
| 2557 | bfd_mips_elf_swap_options_in (abfd, (Elf_External_Options *) l, |
| 2558 | &intopt); |
| 2559 | if (intopt.kind == ODK_REGINFO) |
| 2560 | { |
| 2561 | bfd_byte buf[4]; |
| 2562 | |
| 2563 | if (bfd_seek (abfd, |
| 2564 | (hdr->sh_offset |
| 2565 | + (l - contents) |
| 2566 | + sizeof (Elf_External_Options) |
| 2567 | + (sizeof (Elf32_External_RegInfo) - 4)), |
| 2568 | SEEK_SET) == -1) |
| 2569 | return false; |
| 2570 | bfd_h_put_32 (abfd, elf_gp (abfd), buf); |
| 2571 | if (bfd_write (buf, 1, 4, abfd) != 4) |
| 2572 | return false; |
| 2573 | } |
| 2574 | l += intopt.size; |
| 2575 | } |
| 2576 | } |
| 2577 | |
| 2578 | return _bfd_mips_elf_section_processing (abfd, hdr); |
| 2579 | } |
| 2580 | \f |
| 2581 | /* MIPS ELF uses two common sections. One is the usual one, and the |
| 2582 | other is for small objects. All the small objects are kept |
| 2583 | together, and then referenced via the gp pointer, which yields |
| 2584 | faster assembler code. This is what we use for the small common |
| 2585 | section. This approach is copied from ecoff.c. */ |
| 2586 | static asection mips_elf_scom_section; |
| 2587 | static asymbol mips_elf_scom_symbol; |
| 2588 | static asymbol *mips_elf_scom_symbol_ptr; |
| 2589 | |
| 2590 | /* MIPS ELF also uses an acommon section, which represents an |
| 2591 | allocated common symbol which may be overridden by a |
| 2592 | definition in a shared library. */ |
| 2593 | static asection mips_elf_acom_section; |
| 2594 | static asymbol mips_elf_acom_symbol; |
| 2595 | static asymbol *mips_elf_acom_symbol_ptr; |
| 2596 | |
| 2597 | /* The Irix 5 support uses two virtual sections, which represent |
| 2598 | text/data symbols defined in dynamic objects. */ |
| 2599 | static asection mips_elf_text_section; |
| 2600 | static asection *mips_elf_text_section_ptr; |
| 2601 | static asymbol mips_elf_text_symbol; |
| 2602 | static asymbol *mips_elf_text_symbol_ptr; |
| 2603 | |
| 2604 | static asection mips_elf_data_section; |
| 2605 | static asection *mips_elf_data_section_ptr; |
| 2606 | static asymbol mips_elf_data_symbol; |
| 2607 | static asymbol *mips_elf_data_symbol_ptr; |
| 2608 | |
| 2609 | /* Handle the special MIPS section numbers that a symbol may use. |
| 2610 | This is used for both the 32-bit and the 64-bit ABI. */ |
| 2611 | |
| 2612 | void |
| 2613 | _bfd_mips_elf_symbol_processing (abfd, asym) |
| 2614 | bfd *abfd; |
| 2615 | asymbol *asym; |
| 2616 | { |
| 2617 | elf_symbol_type *elfsym; |
| 2618 | |
| 2619 | elfsym = (elf_symbol_type *) asym; |
| 2620 | switch (elfsym->internal_elf_sym.st_shndx) |
| 2621 | { |
| 2622 | case SHN_MIPS_ACOMMON: |
| 2623 | /* This section is used in a dynamically linked executable file. |
| 2624 | It is an allocated common section. The dynamic linker can |
| 2625 | either resolve these symbols to something in a shared |
| 2626 | library, or it can just leave them here. For our purposes, |
| 2627 | we can consider these symbols to be in a new section. */ |
| 2628 | if (mips_elf_acom_section.name == NULL) |
| 2629 | { |
| 2630 | /* Initialize the acommon section. */ |
| 2631 | mips_elf_acom_section.name = ".acommon"; |
| 2632 | mips_elf_acom_section.flags = SEC_ALLOC; |
| 2633 | mips_elf_acom_section.output_section = &mips_elf_acom_section; |
| 2634 | mips_elf_acom_section.symbol = &mips_elf_acom_symbol; |
| 2635 | mips_elf_acom_section.symbol_ptr_ptr = &mips_elf_acom_symbol_ptr; |
| 2636 | mips_elf_acom_symbol.name = ".acommon"; |
| 2637 | mips_elf_acom_symbol.flags = BSF_SECTION_SYM; |
| 2638 | mips_elf_acom_symbol.section = &mips_elf_acom_section; |
| 2639 | mips_elf_acom_symbol_ptr = &mips_elf_acom_symbol; |
| 2640 | } |
| 2641 | asym->section = &mips_elf_acom_section; |
| 2642 | break; |
| 2643 | |
| 2644 | case SHN_COMMON: |
| 2645 | /* Common symbols less than the GP size are automatically |
| 2646 | treated as SHN_MIPS_SCOMMON symbols. */ |
| 2647 | if (asym->value > elf_gp_size (abfd)) |
| 2648 | break; |
| 2649 | /* Fall through. */ |
| 2650 | case SHN_MIPS_SCOMMON: |
| 2651 | if (mips_elf_scom_section.name == NULL) |
| 2652 | { |
| 2653 | /* Initialize the small common section. */ |
| 2654 | mips_elf_scom_section.name = ".scommon"; |
| 2655 | mips_elf_scom_section.flags = SEC_IS_COMMON; |
| 2656 | mips_elf_scom_section.output_section = &mips_elf_scom_section; |
| 2657 | mips_elf_scom_section.symbol = &mips_elf_scom_symbol; |
| 2658 | mips_elf_scom_section.symbol_ptr_ptr = &mips_elf_scom_symbol_ptr; |
| 2659 | mips_elf_scom_symbol.name = ".scommon"; |
| 2660 | mips_elf_scom_symbol.flags = BSF_SECTION_SYM; |
| 2661 | mips_elf_scom_symbol.section = &mips_elf_scom_section; |
| 2662 | mips_elf_scom_symbol_ptr = &mips_elf_scom_symbol; |
| 2663 | } |
| 2664 | asym->section = &mips_elf_scom_section; |
| 2665 | asym->value = elfsym->internal_elf_sym.st_size; |
| 2666 | break; |
| 2667 | |
| 2668 | case SHN_MIPS_SUNDEFINED: |
| 2669 | asym->section = bfd_und_section_ptr; |
| 2670 | break; |
| 2671 | |
| 2672 | #if 0 /* for SGI_COMPAT */ |
| 2673 | case SHN_MIPS_TEXT: |
| 2674 | asym->section = mips_elf_text_section_ptr; |
| 2675 | break; |
| 2676 | |
| 2677 | case SHN_MIPS_DATA: |
| 2678 | asym->section = mips_elf_data_section_ptr; |
| 2679 | break; |
| 2680 | #endif |
| 2681 | } |
| 2682 | } |
| 2683 | \f |
| 2684 | /* When creating an Irix 5 executable, we need REGINFO and RTPROC |
| 2685 | segments. */ |
| 2686 | |
| 2687 | static int |
| 2688 | mips_elf_additional_program_headers (abfd) |
| 2689 | bfd *abfd; |
| 2690 | { |
| 2691 | asection *s; |
| 2692 | int ret; |
| 2693 | |
| 2694 | ret = 0; |
| 2695 | |
| 2696 | if (! SGI_COMPAT (abfd)) |
| 2697 | return ret; |
| 2698 | |
| 2699 | s = bfd_get_section_by_name (abfd, ".reginfo"); |
| 2700 | if (s != NULL && (s->flags & SEC_LOAD) != 0) |
| 2701 | { |
| 2702 | /* We need a PT_MIPS_REGINFO segment. */ |
| 2703 | ++ret; |
| 2704 | } |
| 2705 | |
| 2706 | if (bfd_get_section_by_name (abfd, ".dynamic") != NULL |
| 2707 | && bfd_get_section_by_name (abfd, ".mdebug") != NULL) |
| 2708 | { |
| 2709 | /* We need a PT_MIPS_RTPROC segment. */ |
| 2710 | ++ret; |
| 2711 | } |
| 2712 | |
| 2713 | return ret; |
| 2714 | } |
| 2715 | |
| 2716 | /* Modify the segment map for an Irix 5 executable. */ |
| 2717 | |
| 2718 | static boolean |
| 2719 | mips_elf_modify_segment_map (abfd) |
| 2720 | bfd *abfd; |
| 2721 | { |
| 2722 | asection *s; |
| 2723 | struct elf_segment_map *m, **pm; |
| 2724 | |
| 2725 | if (! SGI_COMPAT (abfd)) |
| 2726 | return true; |
| 2727 | |
| 2728 | /* If there is a .reginfo section, we need a PT_MIPS_REGINFO |
| 2729 | segment. */ |
| 2730 | s = bfd_get_section_by_name (abfd, ".reginfo"); |
| 2731 | if (s != NULL && (s->flags & SEC_LOAD) != 0) |
| 2732 | { |
| 2733 | for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) |
| 2734 | if (m->p_type == PT_MIPS_REGINFO) |
| 2735 | break; |
| 2736 | if (m == NULL) |
| 2737 | { |
| 2738 | m = (struct elf_segment_map *) bfd_zalloc (abfd, sizeof *m); |
| 2739 | if (m == NULL) |
| 2740 | return false; |
| 2741 | |
| 2742 | m->p_type = PT_MIPS_REGINFO; |
| 2743 | m->count = 1; |
| 2744 | m->sections[0] = s; |
| 2745 | |
| 2746 | /* We want to put it after the PHDR and INTERP segments. */ |
| 2747 | pm = &elf_tdata (abfd)->segment_map; |
| 2748 | while (*pm != NULL |
| 2749 | && ((*pm)->p_type == PT_PHDR |
| 2750 | || (*pm)->p_type == PT_INTERP)) |
| 2751 | pm = &(*pm)->next; |
| 2752 | |
| 2753 | m->next = *pm; |
| 2754 | *pm = m; |
| 2755 | } |
| 2756 | } |
| 2757 | |
| 2758 | /* If there are .dynamic and .mdebug sections, we make a room for |
| 2759 | the RTPROC header. FIXME: Rewrite without section names. */ |
| 2760 | if (bfd_get_section_by_name (abfd, ".interp") == NULL |
| 2761 | && bfd_get_section_by_name (abfd, ".dynamic") != NULL |
| 2762 | && bfd_get_section_by_name (abfd, ".mdebug") != NULL) |
| 2763 | { |
| 2764 | for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) |
| 2765 | if (m->p_type == PT_MIPS_RTPROC) |
| 2766 | break; |
| 2767 | if (m == NULL) |
| 2768 | { |
| 2769 | m = (struct elf_segment_map *) bfd_zalloc (abfd, sizeof *m); |
| 2770 | if (m == NULL) |
| 2771 | return false; |
| 2772 | |
| 2773 | m->p_type = PT_MIPS_RTPROC; |
| 2774 | |
| 2775 | s = bfd_get_section_by_name (abfd, ".rtproc"); |
| 2776 | if (s == NULL) |
| 2777 | { |
| 2778 | m->count = 0; |
| 2779 | m->p_flags = 0; |
| 2780 | m->p_flags_valid = 1; |
| 2781 | } |
| 2782 | else |
| 2783 | { |
| 2784 | m->count = 1; |
| 2785 | m->sections[0] = s; |
| 2786 | } |
| 2787 | |
| 2788 | /* We want to put it after the DYNAMIC segment. */ |
| 2789 | pm = &elf_tdata (abfd)->segment_map; |
| 2790 | while (*pm != NULL && (*pm)->p_type != PT_DYNAMIC) |
| 2791 | pm = &(*pm)->next; |
| 2792 | if (*pm != NULL) |
| 2793 | pm = &(*pm)->next; |
| 2794 | |
| 2795 | m->next = *pm; |
| 2796 | *pm = m; |
| 2797 | } |
| 2798 | } |
| 2799 | |
| 2800 | /* On Irix 5, the PT_DYNAMIC segment includes the .dynamic, .dynstr, |
| 2801 | .dynsym, and .hash sections, and everything in between. */ |
| 2802 | for (pm = &elf_tdata (abfd)->segment_map; *pm != NULL; pm = &(*pm)->next) |
| 2803 | if ((*pm)->p_type == PT_DYNAMIC) |
| 2804 | break; |
| 2805 | m = *pm; |
| 2806 | if (m != NULL |
| 2807 | && m->count == 1 |
| 2808 | && strcmp (m->sections[0]->name, ".dynamic") == 0) |
| 2809 | { |
| 2810 | static const char *sec_names[] = |
| 2811 | { ".dynamic", ".dynstr", ".dynsym", ".hash" }; |
| 2812 | bfd_vma low, high; |
| 2813 | unsigned int i, c; |
| 2814 | struct elf_segment_map *n; |
| 2815 | |
| 2816 | low = 0xffffffff; |
| 2817 | high = 0; |
| 2818 | for (i = 0; i < sizeof sec_names / sizeof sec_names[0]; i++) |
| 2819 | { |
| 2820 | s = bfd_get_section_by_name (abfd, sec_names[i]); |
| 2821 | if (s != NULL && (s->flags & SEC_LOAD) != 0) |
| 2822 | { |
| 2823 | bfd_size_type sz; |
| 2824 | |
| 2825 | if (low > s->vma) |
| 2826 | low = s->vma; |
| 2827 | sz = s->_cooked_size; |
| 2828 | if (sz == 0) |
| 2829 | sz = s->_raw_size; |
| 2830 | if (high < s->vma + sz) |
| 2831 | high = s->vma + sz; |
| 2832 | } |
| 2833 | } |
| 2834 | |
| 2835 | c = 0; |
| 2836 | for (s = abfd->sections; s != NULL; s = s->next) |
| 2837 | if ((s->flags & SEC_LOAD) != 0 |
| 2838 | && s->vma >= low |
| 2839 | && ((s->vma |
| 2840 | + (s->_cooked_size != 0 ? s->_cooked_size : s->_raw_size)) |
| 2841 | <= high)) |
| 2842 | ++c; |
| 2843 | |
| 2844 | n = ((struct elf_segment_map *) |
| 2845 | bfd_zalloc (abfd, sizeof *n + (c - 1) * sizeof (asection *))); |
| 2846 | if (n == NULL) |
| 2847 | return false; |
| 2848 | *n = *m; |
| 2849 | n->count = c; |
| 2850 | |
| 2851 | i = 0; |
| 2852 | for (s = abfd->sections; s != NULL; s = s->next) |
| 2853 | { |
| 2854 | if ((s->flags & SEC_LOAD) != 0 |
| 2855 | && s->vma >= low |
| 2856 | && ((s->vma |
| 2857 | + (s->_cooked_size != 0 ? s->_cooked_size : s->_raw_size)) |
| 2858 | <= high)) |
| 2859 | { |
| 2860 | n->sections[i] = s; |
| 2861 | ++i; |
| 2862 | } |
| 2863 | } |
| 2864 | |
| 2865 | *pm = n; |
| 2866 | } |
| 2867 | |
| 2868 | return true; |
| 2869 | } |
| 2870 | \f |
| 2871 | /* The structure of the runtime procedure descriptor created by the |
| 2872 | loader for use by the static exception system. */ |
| 2873 | |
| 2874 | typedef struct runtime_pdr { |
| 2875 | bfd_vma adr; /* memory address of start of procedure */ |
| 2876 | long regmask; /* save register mask */ |
| 2877 | long regoffset; /* save register offset */ |
| 2878 | long fregmask; /* save floating point register mask */ |
| 2879 | long fregoffset; /* save floating point register offset */ |
| 2880 | long frameoffset; /* frame size */ |
| 2881 | short framereg; /* frame pointer register */ |
| 2882 | short pcreg; /* offset or reg of return pc */ |
| 2883 | long irpss; /* index into the runtime string table */ |
| 2884 | long reserved; |
| 2885 | struct exception_info *exception_info;/* pointer to exception array */ |
| 2886 | } RPDR, *pRPDR; |
| 2887 | #define cbRPDR sizeof(RPDR) |
| 2888 | #define rpdNil ((pRPDR) 0) |
| 2889 | |
| 2890 | /* Swap RPDR (runtime procedure table entry) for output. */ |
| 2891 | |
| 2892 | static void ecoff_swap_rpdr_out |
| 2893 | PARAMS ((bfd *, const RPDR *, struct rpdr_ext *)); |
| 2894 | |
| 2895 | static void |
| 2896 | ecoff_swap_rpdr_out (abfd, in, ex) |
| 2897 | bfd *abfd; |
| 2898 | const RPDR *in; |
| 2899 | struct rpdr_ext *ex; |
| 2900 | { |
| 2901 | /* ecoff_put_off was defined in ecoffswap.h. */ |
| 2902 | ecoff_put_off (abfd, in->adr, (bfd_byte *) ex->p_adr); |
| 2903 | bfd_h_put_32 (abfd, in->regmask, (bfd_byte *) ex->p_regmask); |
| 2904 | bfd_h_put_32 (abfd, in->regoffset, (bfd_byte *) ex->p_regoffset); |
| 2905 | bfd_h_put_32 (abfd, in->fregmask, (bfd_byte *) ex->p_fregmask); |
| 2906 | bfd_h_put_32 (abfd, in->fregoffset, (bfd_byte *) ex->p_fregoffset); |
| 2907 | bfd_h_put_32 (abfd, in->frameoffset, (bfd_byte *) ex->p_frameoffset); |
| 2908 | |
| 2909 | bfd_h_put_16 (abfd, in->framereg, (bfd_byte *) ex->p_framereg); |
| 2910 | bfd_h_put_16 (abfd, in->pcreg, (bfd_byte *) ex->p_pcreg); |
| 2911 | |
| 2912 | bfd_h_put_32 (abfd, in->irpss, (bfd_byte *) ex->p_irpss); |
| 2913 | #if 0 /* FIXME */ |
| 2914 | ecoff_put_off (abfd, in->exception_info, (bfd_byte *) ex->p_exception_info); |
| 2915 | #endif |
| 2916 | } |
| 2917 | \f |
| 2918 | /* Read ECOFF debugging information from a .mdebug section into a |
| 2919 | ecoff_debug_info structure. */ |
| 2920 | |
| 2921 | boolean |
| 2922 | _bfd_mips_elf_read_ecoff_info (abfd, section, debug) |
| 2923 | bfd *abfd; |
| 2924 | asection *section; |
| 2925 | struct ecoff_debug_info *debug; |
| 2926 | { |
| 2927 | HDRR *symhdr; |
| 2928 | const struct ecoff_debug_swap *swap; |
| 2929 | char *ext_hdr = NULL; |
| 2930 | |
| 2931 | swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
| 2932 | |
| 2933 | ext_hdr = (char *) bfd_malloc ((size_t) swap->external_hdr_size); |
| 2934 | if (ext_hdr == NULL && swap->external_hdr_size != 0) |
| 2935 | goto error_return; |
| 2936 | |
| 2937 | if (bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0, |
| 2938 | swap->external_hdr_size) |
| 2939 | == false) |
| 2940 | goto error_return; |
| 2941 | |
| 2942 | symhdr = &debug->symbolic_header; |
| 2943 | (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr); |
| 2944 | |
| 2945 | /* The symbolic header contains absolute file offsets and sizes to |
| 2946 | read. */ |
| 2947 | #define READ(ptr, offset, count, size, type) \ |
| 2948 | if (symhdr->count == 0) \ |
| 2949 | debug->ptr = NULL; \ |
| 2950 | else \ |
| 2951 | { \ |
| 2952 | debug->ptr = (type) bfd_malloc ((size_t) (size * symhdr->count)); \ |
| 2953 | if (debug->ptr == NULL) \ |
| 2954 | goto error_return; \ |
| 2955 | if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \ |
| 2956 | || (bfd_read (debug->ptr, size, symhdr->count, \ |
| 2957 | abfd) != size * symhdr->count)) \ |
| 2958 | goto error_return; \ |
| 2959 | } |
| 2960 | |
| 2961 | READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *); |
| 2962 | READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR); |
| 2963 | READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR); |
| 2964 | READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR); |
| 2965 | READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR); |
| 2966 | READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext), |
| 2967 | union aux_ext *); |
| 2968 | READ (ss, cbSsOffset, issMax, sizeof (char), char *); |
| 2969 | READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *); |
| 2970 | READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR); |
| 2971 | READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR); |
| 2972 | READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR); |
| 2973 | #undef READ |
| 2974 | |
| 2975 | debug->fdr = NULL; |
| 2976 | debug->adjust = NULL; |
| 2977 | |
| 2978 | return true; |
| 2979 | |
| 2980 | error_return: |
| 2981 | if (ext_hdr != NULL) |
| 2982 | free (ext_hdr); |
| 2983 | if (debug->line != NULL) |
| 2984 | free (debug->line); |
| 2985 | if (debug->external_dnr != NULL) |
| 2986 | free (debug->external_dnr); |
| 2987 | if (debug->external_pdr != NULL) |
| 2988 | free (debug->external_pdr); |
| 2989 | if (debug->external_sym != NULL) |
| 2990 | free (debug->external_sym); |
| 2991 | if (debug->external_opt != NULL) |
| 2992 | free (debug->external_opt); |
| 2993 | if (debug->external_aux != NULL) |
| 2994 | free (debug->external_aux); |
| 2995 | if (debug->ss != NULL) |
| 2996 | free (debug->ss); |
| 2997 | if (debug->ssext != NULL) |
| 2998 | free (debug->ssext); |
| 2999 | if (debug->external_fdr != NULL) |
| 3000 | free (debug->external_fdr); |
| 3001 | if (debug->external_rfd != NULL) |
| 3002 | free (debug->external_rfd); |
| 3003 | if (debug->external_ext != NULL) |
| 3004 | free (debug->external_ext); |
| 3005 | return false; |
| 3006 | } |
| 3007 | \f |
| 3008 | /* MIPS ELF local labels start with '$', not 'L'. */ |
| 3009 | |
| 3010 | /*ARGSUSED*/ |
| 3011 | static boolean |
| 3012 | mips_elf_is_local_label_name (abfd, name) |
| 3013 | bfd *abfd; |
| 3014 | const char *name; |
| 3015 | { |
| 3016 | if (name[0] == '$') |
| 3017 | return true; |
| 3018 | |
| 3019 | /* On Irix 6, the labels go back to starting with '.', so we accept |
| 3020 | the generic ELF local label syntax as well. */ |
| 3021 | return _bfd_elf_is_local_label_name (abfd, name); |
| 3022 | } |
| 3023 | |
| 3024 | /* MIPS ELF uses a special find_nearest_line routine in order the |
| 3025 | handle the ECOFF debugging information. */ |
| 3026 | |
| 3027 | struct mips_elf_find_line |
| 3028 | { |
| 3029 | struct ecoff_debug_info d; |
| 3030 | struct ecoff_find_line i; |
| 3031 | }; |
| 3032 | |
| 3033 | boolean |
| 3034 | _bfd_mips_elf_find_nearest_line (abfd, section, symbols, offset, filename_ptr, |
| 3035 | functionname_ptr, line_ptr) |
| 3036 | bfd *abfd; |
| 3037 | asection *section; |
| 3038 | asymbol **symbols; |
| 3039 | bfd_vma offset; |
| 3040 | const char **filename_ptr; |
| 3041 | const char **functionname_ptr; |
| 3042 | unsigned int *line_ptr; |
| 3043 | { |
| 3044 | asection *msec; |
| 3045 | |
| 3046 | if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, |
| 3047 | filename_ptr, functionname_ptr, |
| 3048 | line_ptr)) |
| 3049 | return true; |
| 3050 | |
| 3051 | msec = bfd_get_section_by_name (abfd, ".mdebug"); |
| 3052 | if (msec != NULL) |
| 3053 | { |
| 3054 | flagword origflags; |
| 3055 | struct mips_elf_find_line *fi; |
| 3056 | const struct ecoff_debug_swap * const swap = |
| 3057 | get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
| 3058 | |
| 3059 | /* If we are called during a link, mips_elf_final_link may have |
| 3060 | cleared the SEC_HAS_CONTENTS field. We force it back on here |
| 3061 | if appropriate (which it normally will be). */ |
| 3062 | origflags = msec->flags; |
| 3063 | if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS) |
| 3064 | msec->flags |= SEC_HAS_CONTENTS; |
| 3065 | |
| 3066 | fi = elf_tdata (abfd)->find_line_info; |
| 3067 | if (fi == NULL) |
| 3068 | { |
| 3069 | bfd_size_type external_fdr_size; |
| 3070 | char *fraw_src; |
| 3071 | char *fraw_end; |
| 3072 | struct fdr *fdr_ptr; |
| 3073 | |
| 3074 | fi = ((struct mips_elf_find_line *) |
| 3075 | bfd_zalloc (abfd, sizeof (struct mips_elf_find_line))); |
| 3076 | if (fi == NULL) |
| 3077 | { |
| 3078 | msec->flags = origflags; |
| 3079 | return false; |
| 3080 | } |
| 3081 | |
| 3082 | if (! _bfd_mips_elf_read_ecoff_info (abfd, msec, &fi->d)) |
| 3083 | { |
| 3084 | msec->flags = origflags; |
| 3085 | return false; |
| 3086 | } |
| 3087 | |
| 3088 | /* Swap in the FDR information. */ |
| 3089 | fi->d.fdr = ((struct fdr *) |
| 3090 | bfd_alloc (abfd, |
| 3091 | (fi->d.symbolic_header.ifdMax * |
| 3092 | sizeof (struct fdr)))); |
| 3093 | if (fi->d.fdr == NULL) |
| 3094 | { |
| 3095 | msec->flags = origflags; |
| 3096 | return false; |
| 3097 | } |
| 3098 | external_fdr_size = swap->external_fdr_size; |
| 3099 | fdr_ptr = fi->d.fdr; |
| 3100 | fraw_src = (char *) fi->d.external_fdr; |
| 3101 | fraw_end = (fraw_src |
| 3102 | + fi->d.symbolic_header.ifdMax * external_fdr_size); |
| 3103 | for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++) |
| 3104 | (*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr); |
| 3105 | |
| 3106 | elf_tdata (abfd)->find_line_info = fi; |
| 3107 | |
| 3108 | /* Note that we don't bother to ever free this information. |
| 3109 | find_nearest_line is either called all the time, as in |
| 3110 | objdump -l, so the information should be saved, or it is |
| 3111 | rarely called, as in ld error messages, so the memory |
| 3112 | wasted is unimportant. Still, it would probably be a |
| 3113 | good idea for free_cached_info to throw it away. */ |
| 3114 | } |
| 3115 | |
| 3116 | if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap, |
| 3117 | &fi->i, filename_ptr, functionname_ptr, |
| 3118 | line_ptr)) |
| 3119 | { |
| 3120 | msec->flags = origflags; |
| 3121 | return true; |
| 3122 | } |
| 3123 | |
| 3124 | msec->flags = origflags; |
| 3125 | } |
| 3126 | |
| 3127 | /* Fall back on the generic ELF find_nearest_line routine. */ |
| 3128 | |
| 3129 | return _bfd_elf_find_nearest_line (abfd, section, symbols, offset, |
| 3130 | filename_ptr, functionname_ptr, |
| 3131 | line_ptr); |
| 3132 | } |
| 3133 | \f |
| 3134 | /* The mips16 compiler uses a couple of special sections to handle |
| 3135 | floating point arguments. |
| 3136 | |
| 3137 | Section names that look like .mips16.fn.FNNAME contain stubs that |
| 3138 | copy floating point arguments from the fp regs to the gp regs and |
| 3139 | then jump to FNNAME. If any 32 bit function calls FNNAME, the |
| 3140 | call should be redirected to the stub instead. If no 32 bit |
| 3141 | function calls FNNAME, the stub should be discarded. We need to |
| 3142 | consider any reference to the function, not just a call, because |
| 3143 | if the address of the function is taken we will need the stub, |
| 3144 | since the address might be passed to a 32 bit function. |
| 3145 | |
| 3146 | Section names that look like .mips16.call.FNNAME contain stubs |
| 3147 | that copy floating point arguments from the gp regs to the fp |
| 3148 | regs and then jump to FNNAME. If FNNAME is a 32 bit function, |
| 3149 | then any 16 bit function that calls FNNAME should be redirected |
| 3150 | to the stub instead. If FNNAME is not a 32 bit function, the |
| 3151 | stub should be discarded. |
| 3152 | |
| 3153 | .mips16.call.fp.FNNAME sections are similar, but contain stubs |
| 3154 | which call FNNAME and then copy the return value from the fp regs |
| 3155 | to the gp regs. These stubs store the return value in $18 while |
| 3156 | calling FNNAME; any function which might call one of these stubs |
| 3157 | must arrange to save $18 around the call. (This case is not |
| 3158 | needed for 32 bit functions that call 16 bit functions, because |
| 3159 | 16 bit functions always return floating point values in both |
| 3160 | $f0/$f1 and $2/$3.) |
| 3161 | |
| 3162 | Note that in all cases FNNAME might be defined statically. |
| 3163 | Therefore, FNNAME is not used literally. Instead, the relocation |
| 3164 | information will indicate which symbol the section is for. |
| 3165 | |
| 3166 | We record any stubs that we find in the symbol table. */ |
| 3167 | |
| 3168 | #define FN_STUB ".mips16.fn." |
| 3169 | #define CALL_STUB ".mips16.call." |
| 3170 | #define CALL_FP_STUB ".mips16.call.fp." |
| 3171 | |
| 3172 | /* The MIPS ELF linker needs additional information for each symbol in |
| 3173 | the global hash table. */ |
| 3174 | |
| 3175 | struct mips_elf_link_hash_entry |
| 3176 | { |
| 3177 | struct elf_link_hash_entry root; |
| 3178 | |
| 3179 | /* External symbol information. */ |
| 3180 | EXTR esym; |
| 3181 | |
| 3182 | /* Number of MIPS_32 or MIPS_REL32 relocs against this symbol. */ |
| 3183 | unsigned int mips_32_relocs; |
| 3184 | |
| 3185 | /* If there is a stub that 32 bit functions should use to call this |
| 3186 | 16 bit function, this points to the section containing the stub. */ |
| 3187 | asection *fn_stub; |
| 3188 | |
| 3189 | /* Whether we need the fn_stub; this is set if this symbol appears |
| 3190 | in any relocs other than a 16 bit call. */ |
| 3191 | boolean need_fn_stub; |
| 3192 | |
| 3193 | /* If there is a stub that 16 bit functions should use to call this |
| 3194 | 32 bit function, this points to the section containing the stub. */ |
| 3195 | asection *call_stub; |
| 3196 | |
| 3197 | /* This is like the call_stub field, but it is used if the function |
| 3198 | being called returns a floating point value. */ |
| 3199 | asection *call_fp_stub; |
| 3200 | }; |
| 3201 | |
| 3202 | /* MIPS ELF linker hash table. */ |
| 3203 | |
| 3204 | struct mips_elf_link_hash_table |
| 3205 | { |
| 3206 | struct elf_link_hash_table root; |
| 3207 | /* String section indices for the dynamic section symbols. */ |
| 3208 | bfd_size_type dynsym_sec_strindex[SIZEOF_MIPS_DYNSYM_SECNAMES]; |
| 3209 | /* The number of .rtproc entries. */ |
| 3210 | bfd_size_type procedure_count; |
| 3211 | /* The size of the .compact_rel section (if SGI_COMPAT). */ |
| 3212 | bfd_size_type compact_rel_size; |
| 3213 | /* This flag indicates that the value of DT_MIPS_RLD_MAP dynamic |
| 3214 | entry is set to the address of __rld_obj_head as in Irix 5. */ |
| 3215 | boolean use_rld_obj_head; |
| 3216 | /* This is the value of the __rld_map or __rld_obj_head symbol. */ |
| 3217 | bfd_vma rld_value; |
| 3218 | /* This is set if we see any mips16 stub sections. */ |
| 3219 | boolean mips16_stubs_seen; |
| 3220 | }; |
| 3221 | |
| 3222 | /* Look up an entry in a MIPS ELF linker hash table. */ |
| 3223 | |
| 3224 | #define mips_elf_link_hash_lookup(table, string, create, copy, follow) \ |
| 3225 | ((struct mips_elf_link_hash_entry *) \ |
| 3226 | elf_link_hash_lookup (&(table)->root, (string), (create), \ |
| 3227 | (copy), (follow))) |
| 3228 | |
| 3229 | /* Traverse a MIPS ELF linker hash table. */ |
| 3230 | |
| 3231 | #define mips_elf_link_hash_traverse(table, func, info) \ |
| 3232 | (elf_link_hash_traverse \ |
| 3233 | (&(table)->root, \ |
| 3234 | (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ |
| 3235 | (info))) |
| 3236 | |
| 3237 | /* Get the MIPS ELF linker hash table from a link_info structure. */ |
| 3238 | |
| 3239 | #define mips_elf_hash_table(p) \ |
| 3240 | ((struct mips_elf_link_hash_table *) ((p)->hash)) |
| 3241 | |
| 3242 | static boolean mips_elf_output_extsym |
| 3243 | PARAMS ((struct mips_elf_link_hash_entry *, PTR)); |
| 3244 | |
| 3245 | /* Create an entry in a MIPS ELF linker hash table. */ |
| 3246 | |
| 3247 | static struct bfd_hash_entry * |
| 3248 | mips_elf_link_hash_newfunc (entry, table, string) |
| 3249 | struct bfd_hash_entry *entry; |
| 3250 | struct bfd_hash_table *table; |
| 3251 | const char *string; |
| 3252 | { |
| 3253 | struct mips_elf_link_hash_entry *ret = |
| 3254 | (struct mips_elf_link_hash_entry *) entry; |
| 3255 | |
| 3256 | /* Allocate the structure if it has not already been allocated by a |
| 3257 | subclass. */ |
| 3258 | if (ret == (struct mips_elf_link_hash_entry *) NULL) |
| 3259 | ret = ((struct mips_elf_link_hash_entry *) |
| 3260 | bfd_hash_allocate (table, |
| 3261 | sizeof (struct mips_elf_link_hash_entry))); |
| 3262 | if (ret == (struct mips_elf_link_hash_entry *) NULL) |
| 3263 | return (struct bfd_hash_entry *) ret; |
| 3264 | |
| 3265 | /* Call the allocation method of the superclass. */ |
| 3266 | ret = ((struct mips_elf_link_hash_entry *) |
| 3267 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 3268 | table, string)); |
| 3269 | if (ret != (struct mips_elf_link_hash_entry *) NULL) |
| 3270 | { |
| 3271 | /* Set local fields. */ |
| 3272 | memset (&ret->esym, 0, sizeof (EXTR)); |
| 3273 | /* We use -2 as a marker to indicate that the information has |
| 3274 | not been set. -1 means there is no associated ifd. */ |
| 3275 | ret->esym.ifd = -2; |
| 3276 | ret->mips_32_relocs = 0; |
| 3277 | ret->fn_stub = NULL; |
| 3278 | ret->need_fn_stub = false; |
| 3279 | ret->call_stub = NULL; |
| 3280 | ret->call_fp_stub = NULL; |
| 3281 | } |
| 3282 | |
| 3283 | return (struct bfd_hash_entry *) ret; |
| 3284 | } |
| 3285 | |
| 3286 | /* Create a MIPS ELF linker hash table. */ |
| 3287 | |
| 3288 | static struct bfd_link_hash_table * |
| 3289 | mips_elf_link_hash_table_create (abfd) |
| 3290 | bfd *abfd; |
| 3291 | { |
| 3292 | struct mips_elf_link_hash_table *ret; |
| 3293 | unsigned int i; |
| 3294 | |
| 3295 | ret = ((struct mips_elf_link_hash_table *) |
| 3296 | bfd_alloc (abfd, sizeof (struct mips_elf_link_hash_table))); |
| 3297 | if (ret == (struct mips_elf_link_hash_table *) NULL) |
| 3298 | return NULL; |
| 3299 | |
| 3300 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 3301 | mips_elf_link_hash_newfunc)) |
| 3302 | { |
| 3303 | bfd_release (abfd, ret); |
| 3304 | return NULL; |
| 3305 | } |
| 3306 | |
| 3307 | for (i = 0; i < SIZEOF_MIPS_DYNSYM_SECNAMES; i++) |
| 3308 | ret->dynsym_sec_strindex[i] = (bfd_size_type) -1; |
| 3309 | ret->procedure_count = 0; |
| 3310 | ret->compact_rel_size = 0; |
| 3311 | ret->use_rld_obj_head = false; |
| 3312 | ret->rld_value = 0; |
| 3313 | ret->mips16_stubs_seen = false; |
| 3314 | |
| 3315 | return &ret->root.root; |
| 3316 | } |
| 3317 | |
| 3318 | /* Hook called by the linker routine which adds symbols from an object |
| 3319 | file. We must handle the special MIPS section numbers here. */ |
| 3320 | |
| 3321 | /*ARGSUSED*/ |
| 3322 | static boolean |
| 3323 | mips_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) |
| 3324 | bfd *abfd; |
| 3325 | struct bfd_link_info *info; |
| 3326 | const Elf_Internal_Sym *sym; |
| 3327 | const char **namep; |
| 3328 | flagword *flagsp; |
| 3329 | asection **secp; |
| 3330 | bfd_vma *valp; |
| 3331 | { |
| 3332 | if (SGI_COMPAT (abfd) |
| 3333 | && (abfd->flags & DYNAMIC) != 0 |
| 3334 | && strcmp (*namep, "_rld_new_interface") == 0) |
| 3335 | { |
| 3336 | /* Skip Irix 5 rld entry name. */ |
| 3337 | *namep = NULL; |
| 3338 | return true; |
| 3339 | } |
| 3340 | |
| 3341 | switch (sym->st_shndx) |
| 3342 | { |
| 3343 | case SHN_COMMON: |
| 3344 | /* Common symbols less than the GP size are automatically |
| 3345 | treated as SHN_MIPS_SCOMMON symbols. */ |
| 3346 | if (sym->st_size > elf_gp_size (abfd)) |
| 3347 | break; |
| 3348 | /* Fall through. */ |
| 3349 | case SHN_MIPS_SCOMMON: |
| 3350 | *secp = bfd_make_section_old_way (abfd, ".scommon"); |
| 3351 | (*secp)->flags |= SEC_IS_COMMON; |
| 3352 | *valp = sym->st_size; |
| 3353 | break; |
| 3354 | |
| 3355 | case SHN_MIPS_TEXT: |
| 3356 | /* This section is used in a shared object. */ |
| 3357 | if (mips_elf_text_section_ptr == NULL) |
| 3358 | { |
| 3359 | /* Initialize the section. */ |
| 3360 | mips_elf_text_section.name = ".text"; |
| 3361 | mips_elf_text_section.flags = SEC_NO_FLAGS; |
| 3362 | mips_elf_text_section.output_section = NULL; |
| 3363 | mips_elf_text_section.symbol = &mips_elf_text_symbol; |
| 3364 | mips_elf_text_section.symbol_ptr_ptr = &mips_elf_text_symbol_ptr; |
| 3365 | mips_elf_text_symbol.name = ".text"; |
| 3366 | mips_elf_text_symbol.flags = BSF_SECTION_SYM; |
| 3367 | mips_elf_text_symbol.section = &mips_elf_text_section; |
| 3368 | mips_elf_text_symbol_ptr = &mips_elf_text_symbol; |
| 3369 | mips_elf_text_section_ptr = &mips_elf_text_section; |
| 3370 | } |
| 3371 | /* This code used to do *secp = bfd_und_section_ptr if |
| 3372 | info->shared. I don't know why, and that doesn't make sense, |
| 3373 | so I took it out. */ |
| 3374 | *secp = mips_elf_text_section_ptr; |
| 3375 | break; |
| 3376 | |
| 3377 | case SHN_MIPS_ACOMMON: |
| 3378 | /* Fall through. XXX Can we treat this as allocated data? */ |
| 3379 | case SHN_MIPS_DATA: |
| 3380 | /* This section is used in a shared object. */ |
| 3381 | if (mips_elf_data_section_ptr == NULL) |
| 3382 | { |
| 3383 | /* Initialize the section. */ |
| 3384 | mips_elf_data_section.name = ".data"; |
| 3385 | mips_elf_data_section.flags = SEC_NO_FLAGS; |
| 3386 | mips_elf_data_section.output_section = NULL; |
| 3387 | mips_elf_data_section.symbol = &mips_elf_data_symbol; |
| 3388 | mips_elf_data_section.symbol_ptr_ptr = &mips_elf_data_symbol_ptr; |
| 3389 | mips_elf_data_symbol.name = ".data"; |
| 3390 | mips_elf_data_symbol.flags = BSF_SECTION_SYM; |
| 3391 | mips_elf_data_symbol.section = &mips_elf_data_section; |
| 3392 | mips_elf_data_symbol_ptr = &mips_elf_data_symbol; |
| 3393 | mips_elf_data_section_ptr = &mips_elf_data_section; |
| 3394 | } |
| 3395 | /* This code used to do *secp = bfd_und_section_ptr if |
| 3396 | info->shared. I don't know why, and that doesn't make sense, |
| 3397 | so I took it out. */ |
| 3398 | *secp = mips_elf_data_section_ptr; |
| 3399 | break; |
| 3400 | |
| 3401 | case SHN_MIPS_SUNDEFINED: |
| 3402 | *secp = bfd_und_section_ptr; |
| 3403 | break; |
| 3404 | } |
| 3405 | |
| 3406 | if (SGI_COMPAT (abfd) |
| 3407 | && ! info->shared |
| 3408 | && info->hash->creator == abfd->xvec |
| 3409 | && strcmp (*namep, "__rld_obj_head") == 0) |
| 3410 | { |
| 3411 | struct elf_link_hash_entry *h; |
| 3412 | |
| 3413 | /* Mark __rld_obj_head as dynamic. */ |
| 3414 | h = NULL; |
| 3415 | if (! (_bfd_generic_link_add_one_symbol |
| 3416 | (info, abfd, *namep, BSF_GLOBAL, *secp, |
| 3417 | (bfd_vma) *valp, (const char *) NULL, false, |
| 3418 | get_elf_backend_data (abfd)->collect, |
| 3419 | (struct bfd_link_hash_entry **) &h))) |
| 3420 | return false; |
| 3421 | h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF; |
| 3422 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
| 3423 | h->type = STT_OBJECT; |
| 3424 | |
| 3425 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 3426 | return false; |
| 3427 | |
| 3428 | mips_elf_hash_table (info)->use_rld_obj_head = true; |
| 3429 | } |
| 3430 | |
| 3431 | /* If this is a mips16 text symbol, add 1 to the value to make it |
| 3432 | odd. This will cause something like .word SYM to come up with |
| 3433 | the right value when it is loaded into the PC. */ |
| 3434 | if (sym->st_other == STO_MIPS16) |
| 3435 | ++*valp; |
| 3436 | |
| 3437 | return true; |
| 3438 | } |
| 3439 | |
| 3440 | /* Structure used to pass information to mips_elf_output_extsym. */ |
| 3441 | |
| 3442 | struct extsym_info |
| 3443 | { |
| 3444 | bfd *abfd; |
| 3445 | struct bfd_link_info *info; |
| 3446 | struct ecoff_debug_info *debug; |
| 3447 | const struct ecoff_debug_swap *swap; |
| 3448 | boolean failed; |
| 3449 | }; |
| 3450 | |
| 3451 | /* This routine is used to write out ECOFF debugging external symbol |
| 3452 | information. It is called via mips_elf_link_hash_traverse. The |
| 3453 | ECOFF external symbol information must match the ELF external |
| 3454 | symbol information. Unfortunately, at this point we don't know |
| 3455 | whether a symbol is required by reloc information, so the two |
| 3456 | tables may wind up being different. We must sort out the external |
| 3457 | symbol information before we can set the final size of the .mdebug |
| 3458 | section, and we must set the size of the .mdebug section before we |
| 3459 | can relocate any sections, and we can't know which symbols are |
| 3460 | required by relocation until we relocate the sections. |
| 3461 | Fortunately, it is relatively unlikely that any symbol will be |
| 3462 | stripped but required by a reloc. In particular, it can not happen |
| 3463 | when generating a final executable. */ |
| 3464 | |
| 3465 | static boolean |
| 3466 | mips_elf_output_extsym (h, data) |
| 3467 | struct mips_elf_link_hash_entry *h; |
| 3468 | PTR data; |
| 3469 | { |
| 3470 | struct extsym_info *einfo = (struct extsym_info *) data; |
| 3471 | boolean strip; |
| 3472 | asection *sec, *output_section; |
| 3473 | |
| 3474 | if (h->root.indx == -2) |
| 3475 | strip = false; |
| 3476 | else if (((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 3477 | || (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) |
| 3478 | && (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 |
| 3479 | && (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) |
| 3480 | strip = true; |
| 3481 | else if (einfo->info->strip == strip_all |
| 3482 | || (einfo->info->strip == strip_some |
| 3483 | && bfd_hash_lookup (einfo->info->keep_hash, |
| 3484 | h->root.root.root.string, |
| 3485 | false, false) == NULL)) |
| 3486 | strip = true; |
| 3487 | else |
| 3488 | strip = false; |
| 3489 | |
| 3490 | if (strip) |
| 3491 | return true; |
| 3492 | |
| 3493 | if (h->esym.ifd == -2) |
| 3494 | { |
| 3495 | h->esym.jmptbl = 0; |
| 3496 | h->esym.cobol_main = 0; |
| 3497 | h->esym.weakext = 0; |
| 3498 | h->esym.reserved = 0; |
| 3499 | h->esym.ifd = ifdNil; |
| 3500 | h->esym.asym.value = 0; |
| 3501 | h->esym.asym.st = stGlobal; |
| 3502 | |
| 3503 | if (SGI_COMPAT (einfo->abfd) |
| 3504 | && (h->root.root.type == bfd_link_hash_undefined |
| 3505 | || h->root.root.type == bfd_link_hash_undefweak)) |
| 3506 | { |
| 3507 | const char *name; |
| 3508 | |
| 3509 | /* Use undefined class. Also, set class and type for some |
| 3510 | special symbols. */ |
| 3511 | name = h->root.root.root.string; |
| 3512 | if (strcmp (name, mips_elf_dynsym_rtproc_names[0]) == 0 |
| 3513 | || strcmp (name, mips_elf_dynsym_rtproc_names[1]) == 0) |
| 3514 | { |
| 3515 | h->esym.asym.sc = scData; |
| 3516 | h->esym.asym.st = stLabel; |
| 3517 | h->esym.asym.value = 0; |
| 3518 | } |
| 3519 | else if (strcmp (name, mips_elf_dynsym_rtproc_names[2]) == 0) |
| 3520 | { |
| 3521 | h->esym.asym.sc = scAbs; |
| 3522 | h->esym.asym.st = stLabel; |
| 3523 | h->esym.asym.value = |
| 3524 | mips_elf_hash_table (einfo->info)->procedure_count; |
| 3525 | } |
| 3526 | else if (strcmp (name, "_gp_disp") == 0) |
| 3527 | { |
| 3528 | h->esym.asym.sc = scAbs; |
| 3529 | h->esym.asym.st = stLabel; |
| 3530 | h->esym.asym.value = elf_gp (einfo->abfd); |
| 3531 | } |
| 3532 | else |
| 3533 | h->esym.asym.sc = scUndefined; |
| 3534 | } |
| 3535 | else if (h->root.root.type != bfd_link_hash_defined |
| 3536 | && h->root.root.type != bfd_link_hash_defweak) |
| 3537 | h->esym.asym.sc = scAbs; |
| 3538 | else |
| 3539 | { |
| 3540 | const char *name; |
| 3541 | |
| 3542 | sec = h->root.root.u.def.section; |
| 3543 | output_section = sec->output_section; |
| 3544 | |
| 3545 | /* When making a shared library and symbol h is the one from |
| 3546 | the another shared library, OUTPUT_SECTION may be null. */ |
| 3547 | if (output_section == NULL) |
| 3548 | h->esym.asym.sc = scUndefined; |
| 3549 | else |
| 3550 | { |
| 3551 | name = bfd_section_name (output_section->owner, output_section); |
| 3552 | |
| 3553 | if (strcmp (name, ".text") == 0) |
| 3554 | h->esym.asym.sc = scText; |
| 3555 | else if (strcmp (name, ".data") == 0) |
| 3556 | h->esym.asym.sc = scData; |
| 3557 | else if (strcmp (name, ".sdata") == 0) |
| 3558 | h->esym.asym.sc = scSData; |
| 3559 | else if (strcmp (name, ".rodata") == 0 |
| 3560 | || strcmp (name, ".rdata") == 0) |
| 3561 | h->esym.asym.sc = scRData; |
| 3562 | else if (strcmp (name, ".bss") == 0) |
| 3563 | h->esym.asym.sc = scBss; |
| 3564 | else if (strcmp (name, ".sbss") == 0) |
| 3565 | h->esym.asym.sc = scSBss; |
| 3566 | else if (strcmp (name, ".init") == 0) |
| 3567 | h->esym.asym.sc = scInit; |
| 3568 | else if (strcmp (name, ".fini") == 0) |
| 3569 | h->esym.asym.sc = scFini; |
| 3570 | else |
| 3571 | h->esym.asym.sc = scAbs; |
| 3572 | } |
| 3573 | } |
| 3574 | |
| 3575 | h->esym.asym.reserved = 0; |
| 3576 | h->esym.asym.index = indexNil; |
| 3577 | } |
| 3578 | |
| 3579 | if (h->root.root.type == bfd_link_hash_common) |
| 3580 | h->esym.asym.value = h->root.root.u.c.size; |
| 3581 | else if (h->root.root.type == bfd_link_hash_defined |
| 3582 | || h->root.root.type == bfd_link_hash_defweak) |
| 3583 | { |
| 3584 | if (h->esym.asym.sc == scCommon) |
| 3585 | h->esym.asym.sc = scBss; |
| 3586 | else if (h->esym.asym.sc == scSCommon) |
| 3587 | h->esym.asym.sc = scSBss; |
| 3588 | |
| 3589 | sec = h->root.root.u.def.section; |
| 3590 | output_section = sec->output_section; |
| 3591 | if (output_section != NULL) |
| 3592 | h->esym.asym.value = (h->root.root.u.def.value |
| 3593 | + sec->output_offset |
| 3594 | + output_section->vma); |
| 3595 | else |
| 3596 | h->esym.asym.value = 0; |
| 3597 | } |
| 3598 | else if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
| 3599 | { |
| 3600 | /* Set type and value for a symbol with a function stub. */ |
| 3601 | h->esym.asym.st = stProc; |
| 3602 | sec = h->root.root.u.def.section; |
| 3603 | if (sec == NULL) |
| 3604 | h->esym.asym.value = 0; |
| 3605 | else |
| 3606 | { |
| 3607 | output_section = sec->output_section; |
| 3608 | if (output_section != NULL) |
| 3609 | h->esym.asym.value = (h->root.plt_offset |
| 3610 | + sec->output_offset |
| 3611 | + output_section->vma); |
| 3612 | else |
| 3613 | h->esym.asym.value = 0; |
| 3614 | } |
| 3615 | #if 0 /* FIXME? */ |
| 3616 | h->esym.ifd = 0; |
| 3617 | #endif |
| 3618 | } |
| 3619 | |
| 3620 | if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap, |
| 3621 | h->root.root.root.string, |
| 3622 | &h->esym)) |
| 3623 | { |
| 3624 | einfo->failed = true; |
| 3625 | return false; |
| 3626 | } |
| 3627 | |
| 3628 | return true; |
| 3629 | } |
| 3630 | |
| 3631 | /* Create a runtime procedure table from the .mdebug section. */ |
| 3632 | |
| 3633 | static boolean |
| 3634 | mips_elf_create_procedure_table (handle, abfd, info, s, debug) |
| 3635 | PTR handle; |
| 3636 | bfd *abfd; |
| 3637 | struct bfd_link_info *info; |
| 3638 | asection *s; |
| 3639 | struct ecoff_debug_info *debug; |
| 3640 | { |
| 3641 | const struct ecoff_debug_swap *swap; |
| 3642 | HDRR *hdr = &debug->symbolic_header; |
| 3643 | RPDR *rpdr, *rp; |
| 3644 | struct rpdr_ext *erp; |
| 3645 | PTR rtproc; |
| 3646 | struct pdr_ext *epdr; |
| 3647 | struct sym_ext *esym; |
| 3648 | char *ss, **sv; |
| 3649 | char *str; |
| 3650 | unsigned long size, count; |
| 3651 | unsigned long sindex; |
| 3652 | unsigned long i; |
| 3653 | PDR pdr; |
| 3654 | SYMR sym; |
| 3655 | const char *no_name_func = "static procedure (no name)"; |
| 3656 | |
| 3657 | epdr = NULL; |
| 3658 | rpdr = NULL; |
| 3659 | esym = NULL; |
| 3660 | ss = NULL; |
| 3661 | sv = NULL; |
| 3662 | |
| 3663 | swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
| 3664 | |
| 3665 | sindex = strlen (no_name_func) + 1; |
| 3666 | count = hdr->ipdMax; |
| 3667 | if (count > 0) |
| 3668 | { |
| 3669 | size = swap->external_pdr_size; |
| 3670 | |
| 3671 | epdr = (struct pdr_ext *) bfd_malloc (size * count); |
| 3672 | if (epdr == NULL) |
| 3673 | goto error_return; |
| 3674 | |
| 3675 | if (! _bfd_ecoff_get_accumulated_pdr (handle, (PTR) epdr)) |
| 3676 | goto error_return; |
| 3677 | |
| 3678 | size = sizeof (RPDR); |
| 3679 | rp = rpdr = (RPDR *) bfd_malloc (size * count); |
| 3680 | if (rpdr == NULL) |
| 3681 | goto error_return; |
| 3682 | |
| 3683 | sv = (char **) bfd_malloc (sizeof (char *) * count); |
| 3684 | if (sv == NULL) |
| 3685 | goto error_return; |
| 3686 | |
| 3687 | count = hdr->isymMax; |
| 3688 | size = swap->external_sym_size; |
| 3689 | esym = (struct sym_ext *) bfd_malloc (size * count); |
| 3690 | if (esym == NULL) |
| 3691 | goto error_return; |
| 3692 | |
| 3693 | if (! _bfd_ecoff_get_accumulated_sym (handle, (PTR) esym)) |
| 3694 | goto error_return; |
| 3695 | |
| 3696 | count = hdr->issMax; |
| 3697 | ss = (char *) bfd_malloc (count); |
| 3698 | if (ss == NULL) |
| 3699 | goto error_return; |
| 3700 | if (! _bfd_ecoff_get_accumulated_ss (handle, (PTR) ss)) |
| 3701 | goto error_return; |
| 3702 | |
| 3703 | count = hdr->ipdMax; |
| 3704 | for (i = 0; i < count; i++, rp++) |
| 3705 | { |
| 3706 | (*swap->swap_pdr_in) (abfd, (PTR) (epdr + i), &pdr); |
| 3707 | (*swap->swap_sym_in) (abfd, (PTR) &esym[pdr.isym], &sym); |
| 3708 | rp->adr = sym.value; |
| 3709 | rp->regmask = pdr.regmask; |
| 3710 | rp->regoffset = pdr.regoffset; |
| 3711 | rp->fregmask = pdr.fregmask; |
| 3712 | rp->fregoffset = pdr.fregoffset; |
| 3713 | rp->frameoffset = pdr.frameoffset; |
| 3714 | rp->framereg = pdr.framereg; |
| 3715 | rp->pcreg = pdr.pcreg; |
| 3716 | rp->irpss = sindex; |
| 3717 | sv[i] = ss + sym.iss; |
| 3718 | sindex += strlen (sv[i]) + 1; |
| 3719 | } |
| 3720 | } |
| 3721 | |
| 3722 | size = sizeof (struct rpdr_ext) * (count + 2) + sindex; |
| 3723 | size = BFD_ALIGN (size, 16); |
| 3724 | rtproc = (PTR) bfd_alloc (abfd, size); |
| 3725 | if (rtproc == NULL) |
| 3726 | { |
| 3727 | mips_elf_hash_table (info)->procedure_count = 0; |
| 3728 | goto error_return; |
| 3729 | } |
| 3730 | |
| 3731 | mips_elf_hash_table (info)->procedure_count = count + 2; |
| 3732 | |
| 3733 | erp = (struct rpdr_ext *) rtproc; |
| 3734 | memset (erp, 0, sizeof (struct rpdr_ext)); |
| 3735 | erp++; |
| 3736 | str = (char *) rtproc + sizeof (struct rpdr_ext) * (count + 2); |
| 3737 | strcpy (str, no_name_func); |
| 3738 | str += strlen (no_name_func) + 1; |
| 3739 | for (i = 0; i < count; i++) |
| 3740 | { |
| 3741 | ecoff_swap_rpdr_out (abfd, rpdr + i, erp + i); |
| 3742 | strcpy (str, sv[i]); |
| 3743 | str += strlen (sv[i]) + 1; |
| 3744 | } |
| 3745 | ecoff_put_off (abfd, (bfd_vma) -1, (bfd_byte *) (erp + count)->p_adr); |
| 3746 | |
| 3747 | /* Set the size and contents of .rtproc section. */ |
| 3748 | s->_raw_size = size; |
| 3749 | s->contents = (bfd_byte *) rtproc; |
| 3750 | |
| 3751 | /* Skip this section later on (I don't think this currently |
| 3752 | matters, but someday it might). */ |
| 3753 | s->link_order_head = (struct bfd_link_order *) NULL; |
| 3754 | |
| 3755 | if (epdr != NULL) |
| 3756 | free (epdr); |
| 3757 | if (rpdr != NULL) |
| 3758 | free (rpdr); |
| 3759 | if (esym != NULL) |
| 3760 | free (esym); |
| 3761 | if (ss != NULL) |
| 3762 | free (ss); |
| 3763 | if (sv != NULL) |
| 3764 | free (sv); |
| 3765 | |
| 3766 | return true; |
| 3767 | |
| 3768 | error_return: |
| 3769 | if (epdr != NULL) |
| 3770 | free (epdr); |
| 3771 | if (rpdr != NULL) |
| 3772 | free (rpdr); |
| 3773 | if (esym != NULL) |
| 3774 | free (esym); |
| 3775 | if (ss != NULL) |
| 3776 | free (ss); |
| 3777 | if (sv != NULL) |
| 3778 | free (sv); |
| 3779 | return false; |
| 3780 | } |
| 3781 | |
| 3782 | /* A comparison routine used to sort .gptab entries. */ |
| 3783 | |
| 3784 | static int |
| 3785 | gptab_compare (p1, p2) |
| 3786 | const PTR p1; |
| 3787 | const PTR p2; |
| 3788 | { |
| 3789 | const Elf32_gptab *a1 = (const Elf32_gptab *) p1; |
| 3790 | const Elf32_gptab *a2 = (const Elf32_gptab *) p2; |
| 3791 | |
| 3792 | return a1->gt_entry.gt_g_value - a2->gt_entry.gt_g_value; |
| 3793 | } |
| 3794 | |
| 3795 | /* We need to use a special link routine to handle the .reginfo and |
| 3796 | the .mdebug sections. We need to merge all instances of these |
| 3797 | sections together, not write them all out sequentially. */ |
| 3798 | |
| 3799 | static boolean |
| 3800 | mips_elf_final_link (abfd, info) |
| 3801 | bfd *abfd; |
| 3802 | struct bfd_link_info *info; |
| 3803 | { |
| 3804 | asection **secpp; |
| 3805 | asection *o; |
| 3806 | struct bfd_link_order *p; |
| 3807 | asection *reginfo_sec, *mdebug_sec, *gptab_data_sec, *gptab_bss_sec; |
| 3808 | asection *rtproc_sec; |
| 3809 | Elf32_RegInfo reginfo; |
| 3810 | struct ecoff_debug_info debug; |
| 3811 | const struct ecoff_debug_swap *swap |
| 3812 | = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
| 3813 | HDRR *symhdr = &debug.symbolic_header; |
| 3814 | PTR mdebug_handle = NULL; |
| 3815 | |
| 3816 | /* Drop the .options section, since it has special semantics which I |
| 3817 | haven't bothered to figure out. */ |
| 3818 | for (secpp = &abfd->sections; *secpp != NULL; secpp = &(*secpp)->next) |
| 3819 | { |
| 3820 | if (strcmp ((*secpp)->name, ".options") == 0) |
| 3821 | { |
| 3822 | for (p = (*secpp)->link_order_head; p != NULL; p = p->next) |
| 3823 | if (p->type == bfd_indirect_link_order) |
| 3824 | p->u.indirect.section->flags &=~ SEC_HAS_CONTENTS; |
| 3825 | (*secpp)->link_order_head = NULL; |
| 3826 | *secpp = (*secpp)->next; |
| 3827 | --abfd->section_count; |
| 3828 | break; |
| 3829 | } |
| 3830 | } |
| 3831 | |
| 3832 | /* Get a value for the GP register. */ |
| 3833 | if (elf_gp (abfd) == 0) |
| 3834 | { |
| 3835 | struct bfd_link_hash_entry *h; |
| 3836 | |
| 3837 | h = bfd_link_hash_lookup (info->hash, "_gp", false, false, true); |
| 3838 | if (h != (struct bfd_link_hash_entry *) NULL |
| 3839 | && h->type == bfd_link_hash_defined) |
| 3840 | elf_gp (abfd) = (h->u.def.value |
| 3841 | + h->u.def.section->output_section->vma |
| 3842 | + h->u.def.section->output_offset); |
| 3843 | else if (info->relocateable) |
| 3844 | { |
| 3845 | bfd_vma lo; |
| 3846 | |
| 3847 | /* Make up a value. */ |
| 3848 | lo = (bfd_vma) -1; |
| 3849 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) |
| 3850 | { |
| 3851 | if (o->vma < lo |
| 3852 | && (strcmp (o->name, ".sbss") == 0 |
| 3853 | || strcmp (o->name, ".sdata") == 0 |
| 3854 | || strcmp (o->name, ".lit4") == 0 |
| 3855 | || strcmp (o->name, ".lit8") == 0)) |
| 3856 | lo = o->vma; |
| 3857 | } |
| 3858 | elf_gp (abfd) = lo + ELF_MIPS_GP_OFFSET (abfd); |
| 3859 | } |
| 3860 | else |
| 3861 | { |
| 3862 | /* If the relocate_section function needs to do a reloc |
| 3863 | involving the GP value, it should make a reloc_dangerous |
| 3864 | callback to warn that GP is not defined. */ |
| 3865 | } |
| 3866 | } |
| 3867 | |
| 3868 | /* Go through the sections and collect the .reginfo and .mdebug |
| 3869 | information. */ |
| 3870 | reginfo_sec = NULL; |
| 3871 | mdebug_sec = NULL; |
| 3872 | gptab_data_sec = NULL; |
| 3873 | gptab_bss_sec = NULL; |
| 3874 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) |
| 3875 | { |
| 3876 | if (strcmp (o->name, ".reginfo") == 0) |
| 3877 | { |
| 3878 | memset (®info, 0, sizeof reginfo); |
| 3879 | |
| 3880 | /* We have found the .reginfo section in the output file. |
| 3881 | Look through all the link_orders comprising it and merge |
| 3882 | the information together. */ |
| 3883 | for (p = o->link_order_head; |
| 3884 | p != (struct bfd_link_order *) NULL; |
| 3885 | p = p->next) |
| 3886 | { |
| 3887 | asection *input_section; |
| 3888 | bfd *input_bfd; |
| 3889 | Elf32_External_RegInfo ext; |
| 3890 | Elf32_RegInfo sub; |
| 3891 | |
| 3892 | if (p->type != bfd_indirect_link_order) |
| 3893 | { |
| 3894 | if (p->type == bfd_fill_link_order) |
| 3895 | continue; |
| 3896 | abort (); |
| 3897 | } |
| 3898 | |
| 3899 | input_section = p->u.indirect.section; |
| 3900 | input_bfd = input_section->owner; |
| 3901 | |
| 3902 | /* The linker emulation code has probably clobbered the |
| 3903 | size to be zero bytes. */ |
| 3904 | if (input_section->_raw_size == 0) |
| 3905 | input_section->_raw_size = sizeof (Elf32_External_RegInfo); |
| 3906 | |
| 3907 | if (! bfd_get_section_contents (input_bfd, input_section, |
| 3908 | (PTR) &ext, |
| 3909 | (file_ptr) 0, |
| 3910 | sizeof ext)) |
| 3911 | return false; |
| 3912 | |
| 3913 | bfd_mips_elf32_swap_reginfo_in (input_bfd, &ext, &sub); |
| 3914 | |
| 3915 | reginfo.ri_gprmask |= sub.ri_gprmask; |
| 3916 | reginfo.ri_cprmask[0] |= sub.ri_cprmask[0]; |
| 3917 | reginfo.ri_cprmask[1] |= sub.ri_cprmask[1]; |
| 3918 | reginfo.ri_cprmask[2] |= sub.ri_cprmask[2]; |
| 3919 | reginfo.ri_cprmask[3] |= sub.ri_cprmask[3]; |
| 3920 | |
| 3921 | /* ri_gp_value is set by the function |
| 3922 | mips_elf32_section_processing when the section is |
| 3923 | finally written out. */ |
| 3924 | |
| 3925 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 3926 | elf_link_input_bfd ignores this section. */ |
| 3927 | input_section->flags &=~ SEC_HAS_CONTENTS; |
| 3928 | } |
| 3929 | |
| 3930 | /* Force the section size to the value we want. */ |
| 3931 | o->_raw_size = sizeof (Elf32_External_RegInfo); |
| 3932 | |
| 3933 | /* Skip this section later on (I don't think this currently |
| 3934 | matters, but someday it might). */ |
| 3935 | o->link_order_head = (struct bfd_link_order *) NULL; |
| 3936 | |
| 3937 | reginfo_sec = o; |
| 3938 | } |
| 3939 | |
| 3940 | if (strcmp (o->name, ".mdebug") == 0) |
| 3941 | { |
| 3942 | struct extsym_info einfo; |
| 3943 | |
| 3944 | /* We have found the .mdebug section in the output file. |
| 3945 | Look through all the link_orders comprising it and merge |
| 3946 | the information together. */ |
| 3947 | symhdr->magic = swap->sym_magic; |
| 3948 | /* FIXME: What should the version stamp be? */ |
| 3949 | symhdr->vstamp = 0; |
| 3950 | symhdr->ilineMax = 0; |
| 3951 | symhdr->cbLine = 0; |
| 3952 | symhdr->idnMax = 0; |
| 3953 | symhdr->ipdMax = 0; |
| 3954 | symhdr->isymMax = 0; |
| 3955 | symhdr->ioptMax = 0; |
| 3956 | symhdr->iauxMax = 0; |
| 3957 | symhdr->issMax = 0; |
| 3958 | symhdr->issExtMax = 0; |
| 3959 | symhdr->ifdMax = 0; |
| 3960 | symhdr->crfd = 0; |
| 3961 | symhdr->iextMax = 0; |
| 3962 | |
| 3963 | /* We accumulate the debugging information itself in the |
| 3964 | debug_info structure. */ |
| 3965 | debug.line = NULL; |
| 3966 | debug.external_dnr = NULL; |
| 3967 | debug.external_pdr = NULL; |
| 3968 | debug.external_sym = NULL; |
| 3969 | debug.external_opt = NULL; |
| 3970 | debug.external_aux = NULL; |
| 3971 | debug.ss = NULL; |
| 3972 | debug.ssext = debug.ssext_end = NULL; |
| 3973 | debug.external_fdr = NULL; |
| 3974 | debug.external_rfd = NULL; |
| 3975 | debug.external_ext = debug.external_ext_end = NULL; |
| 3976 | |
| 3977 | mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info); |
| 3978 | if (mdebug_handle == (PTR) NULL) |
| 3979 | return false; |
| 3980 | |
| 3981 | if (SGI_COMPAT (abfd)) |
| 3982 | { |
| 3983 | asection *s; |
| 3984 | EXTR esym; |
| 3985 | bfd_vma last; |
| 3986 | unsigned int i; |
| 3987 | static const char * const name[] = |
| 3988 | { ".text", ".init", ".fini", ".data", |
| 3989 | ".rodata", ".sdata", ".sbss", ".bss" }; |
| 3990 | static const int sc[] = { scText, scInit, scFini, scData, |
| 3991 | scRData, scSData, scSBss, scBss }; |
| 3992 | |
| 3993 | esym.jmptbl = 0; |
| 3994 | esym.cobol_main = 0; |
| 3995 | esym.weakext = 0; |
| 3996 | esym.reserved = 0; |
| 3997 | esym.ifd = ifdNil; |
| 3998 | esym.asym.iss = issNil; |
| 3999 | esym.asym.st = stLocal; |
| 4000 | esym.asym.reserved = 0; |
| 4001 | esym.asym.index = indexNil; |
| 4002 | for (i = 0; i < 8; i++) |
| 4003 | { |
| 4004 | esym.asym.sc = sc[i]; |
| 4005 | s = bfd_get_section_by_name (abfd, name[i]); |
| 4006 | if (s != NULL) |
| 4007 | { |
| 4008 | esym.asym.value = s->vma; |
| 4009 | last = s->vma + s->_raw_size; |
| 4010 | } |
| 4011 | else |
| 4012 | esym.asym.value = last; |
| 4013 | |
| 4014 | if (! bfd_ecoff_debug_one_external (abfd, &debug, swap, |
| 4015 | name[i], &esym)) |
| 4016 | return false; |
| 4017 | } |
| 4018 | } |
| 4019 | |
| 4020 | for (p = o->link_order_head; |
| 4021 | p != (struct bfd_link_order *) NULL; |
| 4022 | p = p->next) |
| 4023 | { |
| 4024 | asection *input_section; |
| 4025 | bfd *input_bfd; |
| 4026 | const struct ecoff_debug_swap *input_swap; |
| 4027 | struct ecoff_debug_info input_debug; |
| 4028 | char *eraw_src; |
| 4029 | char *eraw_end; |
| 4030 | |
| 4031 | if (p->type != bfd_indirect_link_order) |
| 4032 | { |
| 4033 | if (p->type == bfd_fill_link_order) |
| 4034 | continue; |
| 4035 | abort (); |
| 4036 | } |
| 4037 | |
| 4038 | input_section = p->u.indirect.section; |
| 4039 | input_bfd = input_section->owner; |
| 4040 | |
| 4041 | if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour |
| 4042 | || (get_elf_backend_data (input_bfd) |
| 4043 | ->elf_backend_ecoff_debug_swap) == NULL) |
| 4044 | { |
| 4045 | /* I don't know what a non MIPS ELF bfd would be |
| 4046 | doing with a .mdebug section, but I don't really |
| 4047 | want to deal with it. */ |
| 4048 | continue; |
| 4049 | } |
| 4050 | |
| 4051 | input_swap = (get_elf_backend_data (input_bfd) |
| 4052 | ->elf_backend_ecoff_debug_swap); |
| 4053 | |
| 4054 | BFD_ASSERT (p->size == input_section->_raw_size); |
| 4055 | |
| 4056 | /* The ECOFF linking code expects that we have already |
| 4057 | read in the debugging information and set up an |
| 4058 | ecoff_debug_info structure, so we do that now. */ |
| 4059 | if (! _bfd_mips_elf_read_ecoff_info (input_bfd, input_section, |
| 4060 | &input_debug)) |
| 4061 | return false; |
| 4062 | |
| 4063 | if (! (bfd_ecoff_debug_accumulate |
| 4064 | (mdebug_handle, abfd, &debug, swap, input_bfd, |
| 4065 | &input_debug, input_swap, info))) |
| 4066 | return false; |
| 4067 | |
| 4068 | /* Loop through the external symbols. For each one with |
| 4069 | interesting information, try to find the symbol in |
| 4070 | the linker global hash table and save the information |
| 4071 | for the output external symbols. */ |
| 4072 | eraw_src = input_debug.external_ext; |
| 4073 | eraw_end = (eraw_src |
| 4074 | + (input_debug.symbolic_header.iextMax |
| 4075 | * input_swap->external_ext_size)); |
| 4076 | for (; |
| 4077 | eraw_src < eraw_end; |
| 4078 | eraw_src += input_swap->external_ext_size) |
| 4079 | { |
| 4080 | EXTR ext; |
| 4081 | const char *name; |
| 4082 | struct mips_elf_link_hash_entry *h; |
| 4083 | |
| 4084 | (*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext); |
| 4085 | if (ext.asym.sc == scNil |
| 4086 | || ext.asym.sc == scUndefined |
| 4087 | || ext.asym.sc == scSUndefined) |
| 4088 | continue; |
| 4089 | |
| 4090 | name = input_debug.ssext + ext.asym.iss; |
| 4091 | h = mips_elf_link_hash_lookup (mips_elf_hash_table (info), |
| 4092 | name, false, false, true); |
| 4093 | if (h == NULL || h->esym.ifd != -2) |
| 4094 | continue; |
| 4095 | |
| 4096 | if (ext.ifd != -1) |
| 4097 | { |
| 4098 | BFD_ASSERT (ext.ifd |
| 4099 | < input_debug.symbolic_header.ifdMax); |
| 4100 | ext.ifd = input_debug.ifdmap[ext.ifd]; |
| 4101 | } |
| 4102 | |
| 4103 | h->esym = ext; |
| 4104 | } |
| 4105 | |
| 4106 | /* Free up the information we just read. */ |
| 4107 | free (input_debug.line); |
| 4108 | free (input_debug.external_dnr); |
| 4109 | free (input_debug.external_pdr); |
| 4110 | free (input_debug.external_sym); |
| 4111 | free (input_debug.external_opt); |
| 4112 | free (input_debug.external_aux); |
| 4113 | free (input_debug.ss); |
| 4114 | free (input_debug.ssext); |
| 4115 | free (input_debug.external_fdr); |
| 4116 | free (input_debug.external_rfd); |
| 4117 | free (input_debug.external_ext); |
| 4118 | |
| 4119 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 4120 | elf_link_input_bfd ignores this section. */ |
| 4121 | input_section->flags &=~ SEC_HAS_CONTENTS; |
| 4122 | } |
| 4123 | |
| 4124 | if (SGI_COMPAT (abfd) && info->shared) |
| 4125 | { |
| 4126 | /* Create .rtproc section. */ |
| 4127 | rtproc_sec = bfd_get_section_by_name (abfd, ".rtproc"); |
| 4128 | if (rtproc_sec == NULL) |
| 4129 | { |
| 4130 | flagword flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 4131 | | SEC_LINKER_CREATED | SEC_READONLY); |
| 4132 | |
| 4133 | rtproc_sec = bfd_make_section (abfd, ".rtproc"); |
| 4134 | if (rtproc_sec == NULL |
| 4135 | || ! bfd_set_section_flags (abfd, rtproc_sec, flags) |
| 4136 | || ! bfd_set_section_alignment (abfd, rtproc_sec, 4)) |
| 4137 | return false; |
| 4138 | } |
| 4139 | |
| 4140 | if (! mips_elf_create_procedure_table (mdebug_handle, abfd, |
| 4141 | info, rtproc_sec, &debug)) |
| 4142 | return false; |
| 4143 | } |
| 4144 | |
| 4145 | /* Build the external symbol information. */ |
| 4146 | einfo.abfd = abfd; |
| 4147 | einfo.info = info; |
| 4148 | einfo.debug = &debug; |
| 4149 | einfo.swap = swap; |
| 4150 | einfo.failed = false; |
| 4151 | mips_elf_link_hash_traverse (mips_elf_hash_table (info), |
| 4152 | mips_elf_output_extsym, |
| 4153 | (PTR) &einfo); |
| 4154 | if (einfo.failed) |
| 4155 | return false; |
| 4156 | |
| 4157 | /* Set the size of the .mdebug section. */ |
| 4158 | o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap); |
| 4159 | |
| 4160 | /* Skip this section later on (I don't think this currently |
| 4161 | matters, but someday it might). */ |
| 4162 | o->link_order_head = (struct bfd_link_order *) NULL; |
| 4163 | |
| 4164 | mdebug_sec = o; |
| 4165 | } |
| 4166 | |
| 4167 | if (strncmp (o->name, ".gptab.", sizeof ".gptab." - 1) == 0) |
| 4168 | { |
| 4169 | const char *subname; |
| 4170 | unsigned int c; |
| 4171 | Elf32_gptab *tab; |
| 4172 | Elf32_External_gptab *ext_tab; |
| 4173 | unsigned int i; |
| 4174 | |
| 4175 | /* The .gptab.sdata and .gptab.sbss sections hold |
| 4176 | information describing how the small data area would |
| 4177 | change depending upon the -G switch. These sections |
| 4178 | not used in executables files. */ |
| 4179 | if (! info->relocateable) |
| 4180 | { |
| 4181 | asection **secpp; |
| 4182 | |
| 4183 | for (p = o->link_order_head; |
| 4184 | p != (struct bfd_link_order *) NULL; |
| 4185 | p = p->next) |
| 4186 | { |
| 4187 | asection *input_section; |
| 4188 | |
| 4189 | if (p->type != bfd_indirect_link_order) |
| 4190 | { |
| 4191 | if (p->type == bfd_fill_link_order) |
| 4192 | continue; |
| 4193 | abort (); |
| 4194 | } |
| 4195 | |
| 4196 | input_section = p->u.indirect.section; |
| 4197 | |
| 4198 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 4199 | elf_link_input_bfd ignores this section. */ |
| 4200 | input_section->flags &=~ SEC_HAS_CONTENTS; |
| 4201 | } |
| 4202 | |
| 4203 | /* Skip this section later on (I don't think this |
| 4204 | currently matters, but someday it might). */ |
| 4205 | o->link_order_head = (struct bfd_link_order *) NULL; |
| 4206 | |
| 4207 | /* Really remove the section. */ |
| 4208 | for (secpp = &abfd->sections; |
| 4209 | *secpp != o; |
| 4210 | secpp = &(*secpp)->next) |
| 4211 | ; |
| 4212 | *secpp = (*secpp)->next; |
| 4213 | --abfd->section_count; |
| 4214 | |
| 4215 | continue; |
| 4216 | } |
| 4217 | |
| 4218 | /* There is one gptab for initialized data, and one for |
| 4219 | uninitialized data. */ |
| 4220 | if (strcmp (o->name, ".gptab.sdata") == 0) |
| 4221 | gptab_data_sec = o; |
| 4222 | else if (strcmp (o->name, ".gptab.sbss") == 0) |
| 4223 | gptab_bss_sec = o; |
| 4224 | else |
| 4225 | { |
| 4226 | (*_bfd_error_handler) |
| 4227 | ("%s: illegal section name `%s'", |
| 4228 | bfd_get_filename (abfd), o->name); |
| 4229 | bfd_set_error (bfd_error_nonrepresentable_section); |
| 4230 | return false; |
| 4231 | } |
| 4232 | |
| 4233 | /* The linker script always combines .gptab.data and |
| 4234 | .gptab.sdata into .gptab.sdata, and likewise for |
| 4235 | .gptab.bss and .gptab.sbss. It is possible that there is |
| 4236 | no .sdata or .sbss section in the output file, in which |
| 4237 | case we must change the name of the output section. */ |
| 4238 | subname = o->name + sizeof ".gptab" - 1; |
| 4239 | if (bfd_get_section_by_name (abfd, subname) == NULL) |
| 4240 | { |
| 4241 | if (o == gptab_data_sec) |
| 4242 | o->name = ".gptab.data"; |
| 4243 | else |
| 4244 | o->name = ".gptab.bss"; |
| 4245 | subname = o->name + sizeof ".gptab" - 1; |
| 4246 | BFD_ASSERT (bfd_get_section_by_name (abfd, subname) != NULL); |
| 4247 | } |
| 4248 | |
| 4249 | /* Set up the first entry. */ |
| 4250 | c = 1; |
| 4251 | tab = (Elf32_gptab *) bfd_malloc (c * sizeof (Elf32_gptab)); |
| 4252 | if (tab == NULL) |
| 4253 | return false; |
| 4254 | tab[0].gt_header.gt_current_g_value = elf_gp_size (abfd); |
| 4255 | tab[0].gt_header.gt_unused = 0; |
| 4256 | |
| 4257 | /* Combine the input sections. */ |
| 4258 | for (p = o->link_order_head; |
| 4259 | p != (struct bfd_link_order *) NULL; |
| 4260 | p = p->next) |
| 4261 | { |
| 4262 | asection *input_section; |
| 4263 | bfd *input_bfd; |
| 4264 | bfd_size_type size; |
| 4265 | unsigned long last; |
| 4266 | bfd_size_type gpentry; |
| 4267 | |
| 4268 | if (p->type != bfd_indirect_link_order) |
| 4269 | { |
| 4270 | if (p->type == bfd_fill_link_order) |
| 4271 | continue; |
| 4272 | abort (); |
| 4273 | } |
| 4274 | |
| 4275 | input_section = p->u.indirect.section; |
| 4276 | input_bfd = input_section->owner; |
| 4277 | |
| 4278 | /* Combine the gptab entries for this input section one |
| 4279 | by one. We know that the input gptab entries are |
| 4280 | sorted by ascending -G value. */ |
| 4281 | size = bfd_section_size (input_bfd, input_section); |
| 4282 | last = 0; |
| 4283 | for (gpentry = sizeof (Elf32_External_gptab); |
| 4284 | gpentry < size; |
| 4285 | gpentry += sizeof (Elf32_External_gptab)) |
| 4286 | { |
| 4287 | Elf32_External_gptab ext_gptab; |
| 4288 | Elf32_gptab int_gptab; |
| 4289 | unsigned long val; |
| 4290 | unsigned long add; |
| 4291 | boolean exact; |
| 4292 | unsigned int look; |
| 4293 | |
| 4294 | if (! (bfd_get_section_contents |
| 4295 | (input_bfd, input_section, (PTR) &ext_gptab, |
| 4296 | gpentry, sizeof (Elf32_External_gptab)))) |
| 4297 | { |
| 4298 | free (tab); |
| 4299 | return false; |
| 4300 | } |
| 4301 | |
| 4302 | bfd_mips_elf32_swap_gptab_in (input_bfd, &ext_gptab, |
| 4303 | &int_gptab); |
| 4304 | val = int_gptab.gt_entry.gt_g_value; |
| 4305 | add = int_gptab.gt_entry.gt_bytes - last; |
| 4306 | |
| 4307 | exact = false; |
| 4308 | for (look = 1; look < c; look++) |
| 4309 | { |
| 4310 | if (tab[look].gt_entry.gt_g_value >= val) |
| 4311 | tab[look].gt_entry.gt_bytes += add; |
| 4312 | |
| 4313 | if (tab[look].gt_entry.gt_g_value == val) |
| 4314 | exact = true; |
| 4315 | } |
| 4316 | |
| 4317 | if (! exact) |
| 4318 | { |
| 4319 | Elf32_gptab *new_tab; |
| 4320 | unsigned int max; |
| 4321 | |
| 4322 | /* We need a new table entry. */ |
| 4323 | new_tab = ((Elf32_gptab *) |
| 4324 | bfd_realloc ((PTR) tab, |
| 4325 | (c + 1) * sizeof (Elf32_gptab))); |
| 4326 | if (new_tab == NULL) |
| 4327 | { |
| 4328 | free (tab); |
| 4329 | return false; |
| 4330 | } |
| 4331 | tab = new_tab; |
| 4332 | tab[c].gt_entry.gt_g_value = val; |
| 4333 | tab[c].gt_entry.gt_bytes = add; |
| 4334 | |
| 4335 | /* Merge in the size for the next smallest -G |
| 4336 | value, since that will be implied by this new |
| 4337 | value. */ |
| 4338 | max = 0; |
| 4339 | for (look = 1; look < c; look++) |
| 4340 | { |
| 4341 | if (tab[look].gt_entry.gt_g_value < val |
| 4342 | && (max == 0 |
| 4343 | || (tab[look].gt_entry.gt_g_value |
| 4344 | > tab[max].gt_entry.gt_g_value))) |
| 4345 | max = look; |
| 4346 | } |
| 4347 | if (max != 0) |
| 4348 | tab[c].gt_entry.gt_bytes += |
| 4349 | tab[max].gt_entry.gt_bytes; |
| 4350 | |
| 4351 | ++c; |
| 4352 | } |
| 4353 | |
| 4354 | last = int_gptab.gt_entry.gt_bytes; |
| 4355 | } |
| 4356 | |
| 4357 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 4358 | elf_link_input_bfd ignores this section. */ |
| 4359 | input_section->flags &=~ SEC_HAS_CONTENTS; |
| 4360 | } |
| 4361 | |
| 4362 | /* The table must be sorted by -G value. */ |
| 4363 | if (c > 2) |
| 4364 | qsort (tab + 1, c - 1, sizeof (tab[0]), gptab_compare); |
| 4365 | |
| 4366 | /* Swap out the table. */ |
| 4367 | ext_tab = ((Elf32_External_gptab *) |
| 4368 | bfd_alloc (abfd, c * sizeof (Elf32_External_gptab))); |
| 4369 | if (ext_tab == NULL) |
| 4370 | { |
| 4371 | free (tab); |
| 4372 | return false; |
| 4373 | } |
| 4374 | |
| 4375 | for (i = 0; i < c; i++) |
| 4376 | bfd_mips_elf32_swap_gptab_out (abfd, tab + i, ext_tab + i); |
| 4377 | free (tab); |
| 4378 | |
| 4379 | o->_raw_size = c * sizeof (Elf32_External_gptab); |
| 4380 | o->contents = (bfd_byte *) ext_tab; |
| 4381 | |
| 4382 | /* Skip this section later on (I don't think this currently |
| 4383 | matters, but someday it might). */ |
| 4384 | o->link_order_head = (struct bfd_link_order *) NULL; |
| 4385 | } |
| 4386 | } |
| 4387 | |
| 4388 | /* Invoke the regular ELF backend linker to do all the work. */ |
| 4389 | if (! bfd_elf32_bfd_final_link (abfd, info)) |
| 4390 | return false; |
| 4391 | |
| 4392 | /* Now write out the computed sections. */ |
| 4393 | |
| 4394 | if (reginfo_sec != (asection *) NULL) |
| 4395 | { |
| 4396 | Elf32_External_RegInfo ext; |
| 4397 | |
| 4398 | bfd_mips_elf32_swap_reginfo_out (abfd, ®info, &ext); |
| 4399 | if (! bfd_set_section_contents (abfd, reginfo_sec, (PTR) &ext, |
| 4400 | (file_ptr) 0, sizeof ext)) |
| 4401 | return false; |
| 4402 | } |
| 4403 | |
| 4404 | if (mdebug_sec != (asection *) NULL) |
| 4405 | { |
| 4406 | BFD_ASSERT (abfd->output_has_begun); |
| 4407 | if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug, |
| 4408 | swap, info, |
| 4409 | mdebug_sec->filepos)) |
| 4410 | return false; |
| 4411 | |
| 4412 | bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info); |
| 4413 | } |
| 4414 | |
| 4415 | if (gptab_data_sec != (asection *) NULL) |
| 4416 | { |
| 4417 | if (! bfd_set_section_contents (abfd, gptab_data_sec, |
| 4418 | gptab_data_sec->contents, |
| 4419 | (file_ptr) 0, |
| 4420 | gptab_data_sec->_raw_size)) |
| 4421 | return false; |
| 4422 | } |
| 4423 | |
| 4424 | if (gptab_bss_sec != (asection *) NULL) |
| 4425 | { |
| 4426 | if (! bfd_set_section_contents (abfd, gptab_bss_sec, |
| 4427 | gptab_bss_sec->contents, |
| 4428 | (file_ptr) 0, |
| 4429 | gptab_bss_sec->_raw_size)) |
| 4430 | return false; |
| 4431 | } |
| 4432 | |
| 4433 | if (SGI_COMPAT (abfd)) |
| 4434 | { |
| 4435 | rtproc_sec = bfd_get_section_by_name (abfd, ".rtproc"); |
| 4436 | if (rtproc_sec != NULL) |
| 4437 | { |
| 4438 | if (! bfd_set_section_contents (abfd, rtproc_sec, |
| 4439 | rtproc_sec->contents, |
| 4440 | (file_ptr) 0, |
| 4441 | rtproc_sec->_raw_size)) |
| 4442 | return false; |
| 4443 | } |
| 4444 | } |
| 4445 | |
| 4446 | return true; |
| 4447 | } |
| 4448 | |
| 4449 | /* Handle a MIPS ELF HI16 reloc. */ |
| 4450 | |
| 4451 | static void |
| 4452 | mips_elf_relocate_hi16 (input_bfd, relhi, rello, contents, addend) |
| 4453 | bfd *input_bfd; |
| 4454 | Elf_Internal_Rela *relhi; |
| 4455 | Elf_Internal_Rela *rello; |
| 4456 | bfd_byte *contents; |
| 4457 | bfd_vma addend; |
| 4458 | { |
| 4459 | bfd_vma insn; |
| 4460 | bfd_vma addlo; |
| 4461 | |
| 4462 | insn = bfd_get_32 (input_bfd, contents + relhi->r_offset); |
| 4463 | |
| 4464 | addlo = bfd_get_32 (input_bfd, contents + rello->r_offset); |
| 4465 | addlo &= 0xffff; |
| 4466 | |
| 4467 | addend += ((insn & 0xffff) << 16) + addlo; |
| 4468 | |
| 4469 | if ((addlo & 0x8000) != 0) |
| 4470 | addend -= 0x10000; |
| 4471 | if ((addend & 0x8000) != 0) |
| 4472 | addend += 0x10000; |
| 4473 | |
| 4474 | bfd_put_32 (input_bfd, |
| 4475 | (insn & 0xffff0000) | ((addend >> 16) & 0xffff), |
| 4476 | contents + relhi->r_offset); |
| 4477 | } |
| 4478 | |
| 4479 | /* Handle a MIPS ELF local GOT16 reloc. */ |
| 4480 | |
| 4481 | static boolean |
| 4482 | mips_elf_relocate_got_local (output_bfd, input_bfd, sgot, relhi, rello, |
| 4483 | contents, addend) |
| 4484 | bfd *output_bfd; |
| 4485 | bfd *input_bfd; |
| 4486 | asection *sgot; |
| 4487 | Elf_Internal_Rela *relhi; |
| 4488 | Elf_Internal_Rela *rello; |
| 4489 | bfd_byte *contents; |
| 4490 | bfd_vma addend; |
| 4491 | { |
| 4492 | unsigned int assigned_gotno; |
| 4493 | unsigned int i; |
| 4494 | bfd_vma insn; |
| 4495 | bfd_vma addlo; |
| 4496 | bfd_vma address; |
| 4497 | bfd_vma hipage; |
| 4498 | bfd_byte *got_contents; |
| 4499 | struct mips_got_info *g; |
| 4500 | |
| 4501 | insn = bfd_get_32 (input_bfd, contents + relhi->r_offset); |
| 4502 | |
| 4503 | addlo = bfd_get_32 (input_bfd, contents + rello->r_offset); |
| 4504 | addlo &= 0xffff; |
| 4505 | |
| 4506 | addend += ((insn & 0xffff) << 16) + addlo; |
| 4507 | |
| 4508 | if ((addlo & 0x8000) != 0) |
| 4509 | addend -= 0x10000; |
| 4510 | if ((addend & 0x8000) != 0) |
| 4511 | addend += 0x10000; |
| 4512 | |
| 4513 | /* Get a got entry representing requested hipage. */ |
| 4514 | BFD_ASSERT (elf_section_data (sgot) != NULL); |
| 4515 | g = (struct mips_got_info *) elf_section_data (sgot)->tdata; |
| 4516 | BFD_ASSERT (g != NULL); |
| 4517 | |
| 4518 | assigned_gotno = g->assigned_gotno; |
| 4519 | got_contents = sgot->contents; |
| 4520 | hipage = addend & 0xffff0000; |
| 4521 | |
| 4522 | for (i = MIPS_RESERVED_GOTNO; i < assigned_gotno; i++) |
| 4523 | { |
| 4524 | address = bfd_get_32 (input_bfd, got_contents + i * 4); |
| 4525 | if (hipage == (address & 0xffff0000)) |
| 4526 | break; |
| 4527 | } |
| 4528 | |
| 4529 | if (i == assigned_gotno) |
| 4530 | { |
| 4531 | if (assigned_gotno >= g->local_gotno) |
| 4532 | { |
| 4533 | (*_bfd_error_handler) |
| 4534 | ("more got entries are needed for hipage relocations"); |
| 4535 | bfd_set_error (bfd_error_bad_value); |
| 4536 | return false; |
| 4537 | } |
| 4538 | |
| 4539 | bfd_put_32 (input_bfd, hipage, got_contents + assigned_gotno * 4); |
| 4540 | ++g->assigned_gotno; |
| 4541 | } |
| 4542 | |
| 4543 | i = - ELF_MIPS_GP_OFFSET (output_bfd) + i * 4; |
| 4544 | bfd_put_32 (input_bfd, (insn & 0xffff0000) | (i & 0xffff), |
| 4545 | contents + relhi->r_offset); |
| 4546 | |
| 4547 | return true; |
| 4548 | } |
| 4549 | |
| 4550 | /* Handle MIPS ELF CALL16 reloc and global GOT16 reloc. */ |
| 4551 | |
| 4552 | static void |
| 4553 | mips_elf_relocate_global_got (input_bfd, rel, contents, offset) |
| 4554 | bfd *input_bfd; |
| 4555 | Elf_Internal_Rela *rel; |
| 4556 | bfd_byte *contents; |
| 4557 | bfd_vma offset; |
| 4558 | { |
| 4559 | bfd_vma insn; |
| 4560 | |
| 4561 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 4562 | bfd_put_32 (input_bfd, |
| 4563 | (insn & 0xffff0000) | (offset & 0xffff), |
| 4564 | contents + rel->r_offset); |
| 4565 | } |
| 4566 | |
| 4567 | /* Relocate a MIPS ELF section. */ |
| 4568 | |
| 4569 | static boolean |
| 4570 | mips_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
| 4571 | contents, relocs, local_syms, local_sections) |
| 4572 | bfd *output_bfd; |
| 4573 | struct bfd_link_info *info; |
| 4574 | bfd *input_bfd; |
| 4575 | asection *input_section; |
| 4576 | bfd_byte *contents; |
| 4577 | Elf_Internal_Rela *relocs; |
| 4578 | Elf_Internal_Sym *local_syms; |
| 4579 | asection **local_sections; |
| 4580 | { |
| 4581 | Elf_Internal_Shdr *symtab_hdr; |
| 4582 | size_t locsymcount; |
| 4583 | size_t extsymoff; |
| 4584 | asection *sgot, *sreloc, *scpt; |
| 4585 | bfd *dynobj; |
| 4586 | bfd_vma gp; |
| 4587 | Elf_Internal_Rela *rel; |
| 4588 | Elf_Internal_Rela *relend; |
| 4589 | struct mips_got_info *g; |
| 4590 | |
| 4591 | dynobj = elf_hash_table (info)->dynobj; |
| 4592 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 4593 | |
| 4594 | sgot = NULL; |
| 4595 | sreloc = NULL; |
| 4596 | if (dynobj == NULL || ! SGI_COMPAT (output_bfd)) |
| 4597 | scpt = NULL; |
| 4598 | else |
| 4599 | scpt = bfd_get_section_by_name (dynobj, ".compact_rel"); |
| 4600 | g = NULL; |
| 4601 | |
| 4602 | if (elf_bad_symtab (input_bfd)) |
| 4603 | { |
| 4604 | locsymcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym); |
| 4605 | extsymoff = 0; |
| 4606 | } |
| 4607 | else |
| 4608 | { |
| 4609 | locsymcount = symtab_hdr->sh_info; |
| 4610 | extsymoff = symtab_hdr->sh_info; |
| 4611 | } |
| 4612 | |
| 4613 | gp = _bfd_get_gp_value (output_bfd); |
| 4614 | |
| 4615 | rel = relocs; |
| 4616 | relend = relocs + input_section->reloc_count; |
| 4617 | for (; rel < relend; rel++) |
| 4618 | { |
| 4619 | int r_type; |
| 4620 | reloc_howto_type *howto; |
| 4621 | unsigned long r_symndx; |
| 4622 | bfd_vma addend; |
| 4623 | struct elf_link_hash_entry *h; |
| 4624 | asection *sec; |
| 4625 | Elf_Internal_Sym *sym; |
| 4626 | struct mips_elf_link_hash_entry *mh; |
| 4627 | int other; |
| 4628 | bfd_reloc_status_type r; |
| 4629 | |
| 4630 | r_type = ELF32_R_TYPE (rel->r_info); |
| 4631 | if ((r_type < 0 || r_type >= (int) R_MIPS_max) |
| 4632 | /* start-sanitize-sky */ |
| 4633 | && r_type != R_MIPS_DVP_11_PCREL |
| 4634 | /* end-sanitize-sky */ |
| 4635 | && r_type != R_MIPS16_26 |
| 4636 | && r_type != R_MIPS16_GPREL) |
| 4637 | { |
| 4638 | bfd_set_error (bfd_error_bad_value); |
| 4639 | return false; |
| 4640 | } |
| 4641 | if (r_type == R_MIPS16_26) |
| 4642 | howto = &elf_mips16_jump_howto; |
| 4643 | else if (r_type == R_MIPS16_GPREL) |
| 4644 | howto = &elf_mips16_gprel_howto; |
| 4645 | /* start-sanitize-sky */ |
| 4646 | else if (r_type == R_MIPS_DVP_11_PCREL) |
| 4647 | howto = &elf_mips_dvp_11_pcrel_howto; |
| 4648 | /* end-sanitize-sky */ |
| 4649 | else |
| 4650 | howto = elf_mips_howto_table + r_type; |
| 4651 | |
| 4652 | if (dynobj != NULL |
| 4653 | && (r_type == R_MIPS_CALL16 |
| 4654 | || r_type == R_MIPS_GOT16 |
| 4655 | || r_type == R_MIPS_CALL_HI16 |
| 4656 | || r_type == R_MIPS_CALL_LO16 |
| 4657 | || r_type == R_MIPS_GOT_HI16 |
| 4658 | || r_type == R_MIPS_GOT_LO16)) |
| 4659 | { |
| 4660 | /* We need the .got section. */ |
| 4661 | if (sgot == NULL) |
| 4662 | { |
| 4663 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 4664 | BFD_ASSERT (sgot != NULL); |
| 4665 | BFD_ASSERT (elf_section_data (sgot) != NULL); |
| 4666 | g = (struct mips_got_info *) elf_section_data (sgot)->tdata; |
| 4667 | BFD_ASSERT (g != NULL); |
| 4668 | } |
| 4669 | } |
| 4670 | |
| 4671 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 4672 | |
| 4673 | /* Mix in the change in GP address for a GP relative reloc. */ |
| 4674 | if (r_type != R_MIPS_GPREL16 |
| 4675 | && r_type != R_MIPS_LITERAL |
| 4676 | && r_type != R_MIPS_GPREL32 |
| 4677 | && r_type != R_MIPS16_GPREL) |
| 4678 | addend = 0; |
| 4679 | else |
| 4680 | { |
| 4681 | if (gp == 0) |
| 4682 | { |
| 4683 | if (! ((*info->callbacks->reloc_dangerous) |
| 4684 | (info, |
| 4685 | "GP relative relocation when GP not defined", |
| 4686 | input_bfd, input_section, |
| 4687 | rel->r_offset))) |
| 4688 | return false; |
| 4689 | /* Only give the error once per link. */ |
| 4690 | gp = 4; |
| 4691 | _bfd_set_gp_value (output_bfd, gp); |
| 4692 | } |
| 4693 | |
| 4694 | if (r_symndx < extsymoff |
| 4695 | || (elf_bad_symtab (input_bfd) |
| 4696 | && local_sections[r_symndx] != NULL)) |
| 4697 | { |
| 4698 | /* This is a relocation against a section. The current |
| 4699 | addend in the instruction is the difference between |
| 4700 | INPUT_SECTION->vma and the GP value of INPUT_BFD. We |
| 4701 | must change this to be the difference between the |
| 4702 | final definition (which will end up in RELOCATION) |
| 4703 | and the GP value of OUTPUT_BFD (which is in GP). */ |
| 4704 | addend = elf_gp (input_bfd) - gp; |
| 4705 | } |
| 4706 | else if (! info->relocateable) |
| 4707 | { |
| 4708 | /* We are doing a final link. The current addend in the |
| 4709 | instruction is simply the desired offset into the |
| 4710 | symbol (normally zero). We want the instruction to |
| 4711 | hold the difference between the final definition of |
| 4712 | the symbol (which will end up in RELOCATION) and the |
| 4713 | GP value of OUTPUT_BFD (which is in GP). */ |
| 4714 | addend = - gp; |
| 4715 | } |
| 4716 | else |
| 4717 | { |
| 4718 | /* We are generating relocateable output, and we aren't |
| 4719 | going to define this symbol, so we just leave the |
| 4720 | instruction alone. */ |
| 4721 | addend = 0; |
| 4722 | } |
| 4723 | } |
| 4724 | |
| 4725 | h = NULL; |
| 4726 | sym = NULL; |
| 4727 | sec = NULL; |
| 4728 | if (info->relocateable) |
| 4729 | { |
| 4730 | /* This is a relocateable link. We don't have to change |
| 4731 | anything, unless the reloc is against a section symbol, |
| 4732 | in which case we have to adjust according to where the |
| 4733 | section symbol winds up in the output section. */ |
| 4734 | if (r_symndx >= locsymcount |
| 4735 | || (elf_bad_symtab (input_bfd) |
| 4736 | && local_sections[r_symndx] == NULL)) |
| 4737 | r = bfd_reloc_ok; |
| 4738 | else |
| 4739 | { |
| 4740 | sym = local_syms + r_symndx; |
| 4741 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 4742 | r = bfd_reloc_ok; |
| 4743 | else |
| 4744 | { |
| 4745 | sec = local_sections[r_symndx]; |
| 4746 | |
| 4747 | /* It would be logical to add sym->st_value here, |
| 4748 | but Irix 5 sometimes generates a garbage symbol |
| 4749 | value. */ |
| 4750 | addend += sec->output_offset; |
| 4751 | |
| 4752 | /* If this is HI16 or GOT16 with an associated LO16, |
| 4753 | adjust the addend accordingly. Otherwise, just |
| 4754 | relocate. */ |
| 4755 | if (r_type == R_MIPS_64 && bfd_big_endian (input_bfd)) |
| 4756 | r = _bfd_relocate_contents (howto, input_bfd, |
| 4757 | addend, |
| 4758 | contents + rel->r_offset + 4); |
| 4759 | else if (r_type != R_MIPS_HI16 && r_type != R_MIPS_GOT16) |
| 4760 | r = _bfd_relocate_contents (howto, input_bfd, |
| 4761 | addend, |
| 4762 | contents + rel->r_offset); |
| 4763 | else |
| 4764 | { |
| 4765 | Elf_Internal_Rela *lorel; |
| 4766 | |
| 4767 | /* As a GNU extension, permit an arbitrary |
| 4768 | number of R_MIPS_HI16 relocs before the |
| 4769 | R_MIPS_LO16 reloc. This permits gcc to emit |
| 4770 | the HI and LO relocs itself. */ |
| 4771 | if (r_type == R_MIPS_GOT16) |
| 4772 | lorel = rel + 1; |
| 4773 | else |
| 4774 | { |
| 4775 | for (lorel = rel + 1; |
| 4776 | (lorel < relend |
| 4777 | && (ELF32_R_TYPE (lorel->r_info) |
| 4778 | == R_MIPS_HI16)); |
| 4779 | lorel++) |
| 4780 | ; |
| 4781 | } |
| 4782 | if (lorel < relend |
| 4783 | && ELF32_R_TYPE (lorel->r_info) == R_MIPS_LO16) |
| 4784 | { |
| 4785 | mips_elf_relocate_hi16 (input_bfd, rel, lorel, |
| 4786 | contents, addend); |
| 4787 | r = bfd_reloc_ok; |
| 4788 | } |
| 4789 | else |
| 4790 | r = _bfd_relocate_contents (howto, input_bfd, |
| 4791 | addend, |
| 4792 | contents + rel->r_offset); |
| 4793 | } |
| 4794 | } |
| 4795 | } |
| 4796 | } |
| 4797 | else |
| 4798 | { |
| 4799 | bfd_vma relocation; |
| 4800 | boolean local; |
| 4801 | |
| 4802 | /* This is a final link. */ |
| 4803 | sym = NULL; |
| 4804 | if (r_symndx < extsymoff |
| 4805 | || (elf_bad_symtab (input_bfd) |
| 4806 | && local_sections[r_symndx] != NULL)) |
| 4807 | { |
| 4808 | local = true; |
| 4809 | sym = local_syms + r_symndx; |
| 4810 | sec = local_sections[r_symndx]; |
| 4811 | relocation = (sec->output_section->vma |
| 4812 | + sec->output_offset); |
| 4813 | |
| 4814 | /* It would be logical to always add sym->st_value here, |
| 4815 | but Irix 5 sometimes generates a garbage symbol |
| 4816 | value. */ |
| 4817 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 4818 | relocation += sym->st_value; |
| 4819 | |
| 4820 | /* mips16 text labels should be treated as odd. */ |
| 4821 | if (sym->st_other == STO_MIPS16) |
| 4822 | ++relocation; |
| 4823 | } |
| 4824 | else |
| 4825 | { |
| 4826 | long indx; |
| 4827 | |
| 4828 | local = false; |
| 4829 | indx = r_symndx - extsymoff; |
| 4830 | h = elf_sym_hashes (input_bfd)[indx]; |
| 4831 | while (h->root.type == bfd_link_hash_indirect |
| 4832 | || h->root.type == bfd_link_hash_warning) |
| 4833 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 4834 | if (strcmp (h->root.root.string, "_gp_disp") == 0) |
| 4835 | { |
| 4836 | if (gp == 0) |
| 4837 | { |
| 4838 | if (! ((*info->callbacks->reloc_dangerous) |
| 4839 | (info, |
| 4840 | "_gp_disp used when GP not defined", |
| 4841 | input_bfd, input_section, |
| 4842 | rel->r_offset))) |
| 4843 | return false; |
| 4844 | /* Only give the error once per link. */ |
| 4845 | gp = 4; |
| 4846 | _bfd_set_gp_value (output_bfd, gp); |
| 4847 | relocation = 0; |
| 4848 | } |
| 4849 | else |
| 4850 | { |
| 4851 | sec = input_section; |
| 4852 | if (sec->output_section != NULL) |
| 4853 | relocation = (gp |
| 4854 | - (rel->r_offset |
| 4855 | + sec->output_section->vma |
| 4856 | + sec->output_offset)); |
| 4857 | else |
| 4858 | relocation = gp - rel->r_offset; |
| 4859 | if (r_type == R_MIPS_LO16) |
| 4860 | relocation += 4; |
| 4861 | } |
| 4862 | } |
| 4863 | else if (h->root.type == bfd_link_hash_defined |
| 4864 | || h->root.type == bfd_link_hash_defweak) |
| 4865 | { |
| 4866 | sec = h->root.u.def.section; |
| 4867 | if (sec->output_section == NULL) |
| 4868 | relocation = 0; |
| 4869 | else |
| 4870 | relocation = (h->root.u.def.value |
| 4871 | + sec->output_section->vma |
| 4872 | + sec->output_offset); |
| 4873 | } |
| 4874 | else if (h->root.type == bfd_link_hash_undefweak) |
| 4875 | relocation = 0; |
| 4876 | else if (info->shared && ! info->symbolic) |
| 4877 | relocation = 0; |
| 4878 | else if (strcmp (h->root.root.string, "_DYNAMIC_LINK") == 0) |
| 4879 | { |
| 4880 | /* If this is a dynamic link, we should have created |
| 4881 | a _DYNAMIC_LINK symbol in |
| 4882 | mips_elf_create_dynamic_sections. Otherwise, we |
| 4883 | should define the symbol with a value of 0. |
| 4884 | FIXME: It should probably get into the symbol |
| 4885 | table somehow as well. */ |
| 4886 | BFD_ASSERT (! info->shared); |
| 4887 | BFD_ASSERT (bfd_get_section_by_name (output_bfd, |
| 4888 | ".dynamic") == NULL); |
| 4889 | relocation = 0; |
| 4890 | } |
| 4891 | else |
| 4892 | { |
| 4893 | if (! ((*info->callbacks->undefined_symbol) |
| 4894 | (info, h->root.root.string, input_bfd, |
| 4895 | input_section, rel->r_offset))) |
| 4896 | return false; |
| 4897 | relocation = 0; |
| 4898 | } |
| 4899 | } |
| 4900 | |
| 4901 | mh = (struct mips_elf_link_hash_entry *) h; |
| 4902 | if (h != NULL) |
| 4903 | other = h->other; |
| 4904 | else if (sym != NULL) |
| 4905 | other = sym->st_other; |
| 4906 | else |
| 4907 | other = 0; |
| 4908 | |
| 4909 | /* If this function has an fn_stub, then it is a mips16 |
| 4910 | function which needs a stub if it is called by a 32 bit |
| 4911 | function. If this reloc is anything other than a 16 bit |
| 4912 | call, redirect the reloc to the stub. We don't redirect |
| 4913 | relocs from other stub functions. */ |
| 4914 | if (r_type != R_MIPS16_26 |
| 4915 | && ((mh != NULL |
| 4916 | && mh->fn_stub != NULL) |
| 4917 | || (mh == NULL |
| 4918 | && elf_tdata (input_bfd)->local_stubs != NULL |
| 4919 | && elf_tdata (input_bfd)->local_stubs[r_symndx] != NULL)) |
| 4920 | && strncmp (bfd_get_section_name (input_bfd, input_section), |
| 4921 | FN_STUB, sizeof FN_STUB - 1) != 0 |
| 4922 | && strncmp (bfd_get_section_name (input_bfd, input_section), |
| 4923 | CALL_STUB, sizeof CALL_STUB - 1) != 0 |
| 4924 | && strncmp (bfd_get_section_name (input_bfd, input_section), |
| 4925 | CALL_FP_STUB, sizeof CALL_FP_STUB - 1) != 0) |
| 4926 | { |
| 4927 | if (mh != NULL) |
| 4928 | { |
| 4929 | BFD_ASSERT (mh->need_fn_stub); |
| 4930 | relocation = (mh->fn_stub->output_section->vma |
| 4931 | + mh->fn_stub->output_offset); |
| 4932 | } |
| 4933 | else |
| 4934 | { |
| 4935 | asection *fn_stub; |
| 4936 | |
| 4937 | fn_stub = elf_tdata (input_bfd)->local_stubs[r_symndx]; |
| 4938 | relocation = (fn_stub->output_section->vma |
| 4939 | + fn_stub->output_offset); |
| 4940 | } |
| 4941 | |
| 4942 | /* RELOCATION now points to 32 bit code. */ |
| 4943 | other = 0; |
| 4944 | } |
| 4945 | |
| 4946 | /* If this function has a call_stub, then it is called by a |
| 4947 | mips16 function; the call needs to go through a stub if |
| 4948 | this function is a 32 bit function. If this reloc is a |
| 4949 | 16 bit call, and the symbol is not a 16 bit function, |
| 4950 | then redirect the reloc to the stub. Note that we don't |
| 4951 | need to worry about calling the function through a |
| 4952 | function pointer; such calls are handled by routing |
| 4953 | through a special mips16 routine. We don't have to check |
| 4954 | whether this call is from a stub; it can't be, because a |
| 4955 | stub contains 32 bit code, and hence can not have a 16 |
| 4956 | bit reloc. */ |
| 4957 | if (r_type == R_MIPS16_26 |
| 4958 | && mh != NULL |
| 4959 | && (mh->call_stub != NULL || mh->call_fp_stub != NULL) |
| 4960 | && other != STO_MIPS16) |
| 4961 | { |
| 4962 | asection *stub; |
| 4963 | |
| 4964 | /* If both call_stub and call_fp_stub are defined, we |
| 4965 | can figure out which one to use by seeing which one |
| 4966 | appears in the input file. */ |
| 4967 | if (mh->call_stub != NULL && mh->call_fp_stub != NULL) |
| 4968 | { |
| 4969 | asection *o; |
| 4970 | |
| 4971 | stub = NULL; |
| 4972 | for (o = input_bfd->sections; o != NULL; o = o->next) |
| 4973 | { |
| 4974 | if (strncmp (bfd_get_section_name (input_bfd, o), |
| 4975 | CALL_FP_STUB, sizeof CALL_FP_STUB - 1) == 0) |
| 4976 | { |
| 4977 | stub = mh->call_fp_stub; |
| 4978 | break; |
| 4979 | } |
| 4980 | } |
| 4981 | if (stub == NULL) |
| 4982 | stub = mh->call_stub; |
| 4983 | } |
| 4984 | else if (mh->call_stub != NULL) |
| 4985 | stub = mh->call_stub; |
| 4986 | else |
| 4987 | stub = mh->call_fp_stub; |
| 4988 | |
| 4989 | BFD_ASSERT (stub->_raw_size > 0); |
| 4990 | relocation = stub->output_section->vma + stub->output_offset; |
| 4991 | } |
| 4992 | |
| 4993 | if (r_type == R_MIPS_HI16) |
| 4994 | { |
| 4995 | Elf_Internal_Rela *lorel; |
| 4996 | |
| 4997 | /* As a GNU extension, permit an arbitrary number of |
| 4998 | R_MIPS_HI16 relocs before the R_MIPS_LO16 reloc. |
| 4999 | This permits gcc to emit the HI and LO relocs itself. */ |
| 5000 | for (lorel = rel + 1; |
| 5001 | (lorel < relend |
| 5002 | && ELF32_R_TYPE (lorel->r_info) == R_MIPS_HI16); |
| 5003 | lorel++) |
| 5004 | ; |
| 5005 | if (lorel < relend |
| 5006 | && ELF32_R_TYPE (lorel->r_info) == R_MIPS_LO16) |
| 5007 | { |
| 5008 | mips_elf_relocate_hi16 (input_bfd, rel, lorel, |
| 5009 | contents, relocation + addend); |
| 5010 | r = bfd_reloc_ok; |
| 5011 | } |
| 5012 | else |
| 5013 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 5014 | contents, rel->r_offset, |
| 5015 | relocation, addend); |
| 5016 | } |
| 5017 | else if (r_type == R_MIPS_GOT16 && local) |
| 5018 | { |
| 5019 | /* GOT16 must also have an associated LO16 in the local |
| 5020 | case. In this case, the addend is extracted and the |
| 5021 | section in which the referenced object is determined. |
| 5022 | Then the final address of the object is computed and |
| 5023 | the GOT entry for the hipage (an aligned 64kb chunk) |
| 5024 | is added to .got section if needed. The offset field |
| 5025 | of the GOT16-relocated instruction is replaced by the |
| 5026 | index of this GOT entry for the hipage. */ |
| 5027 | if ((rel + 1) < relend |
| 5028 | && ELF32_R_TYPE ((rel + 1)->r_info) == R_MIPS_LO16) |
| 5029 | { |
| 5030 | if (! mips_elf_relocate_got_local (output_bfd, input_bfd, |
| 5031 | sgot, rel, rel + 1, |
| 5032 | contents, |
| 5033 | relocation + addend)) |
| 5034 | return false; |
| 5035 | r = bfd_reloc_ok; |
| 5036 | } |
| 5037 | else |
| 5038 | r = bfd_reloc_outofrange; |
| 5039 | } |
| 5040 | else if (r_type == R_MIPS_CALL16 |
| 5041 | || r_type == R_MIPS_GOT16 |
| 5042 | || r_type == R_MIPS_CALL_LO16 |
| 5043 | || r_type == R_MIPS_GOT_LO16) |
| 5044 | { |
| 5045 | bfd_vma offset; |
| 5046 | |
| 5047 | /* This symbol must be registered as a global symbol |
| 5048 | having the corresponding got entry. */ |
| 5049 | BFD_ASSERT (h->got_offset != (bfd_vma) -1); |
| 5050 | |
| 5051 | offset = (h->dynindx - g->global_gotsym + g->local_gotno) * 4; |
| 5052 | BFD_ASSERT (g->local_gotno <= offset |
| 5053 | && offset < sgot->_raw_size); |
| 5054 | bfd_put_32 (output_bfd, relocation + addend, |
| 5055 | sgot->contents + offset); |
| 5056 | offset = (sgot->output_section->vma + sgot->output_offset |
| 5057 | + offset - gp); |
| 5058 | mips_elf_relocate_global_got (input_bfd, rel, contents, |
| 5059 | offset); |
| 5060 | r = bfd_reloc_ok; |
| 5061 | } |
| 5062 | else if (r_type == R_MIPS_CALL_HI16 |
| 5063 | || r_type == R_MIPS_GOT_HI16) |
| 5064 | { |
| 5065 | bfd_vma offset; |
| 5066 | |
| 5067 | /* This must be a global symbol with a got entry. The |
| 5068 | next reloc must be the corresponding LO16 reloc. */ |
| 5069 | BFD_ASSERT (h != NULL && h->got_offset != (bfd_vma) -1); |
| 5070 | BFD_ASSERT ((rel + 1) < relend); |
| 5071 | BFD_ASSERT (ELF32_R_TYPE ((rel + 1)->r_info) |
| 5072 | == (r_type == R_MIPS_CALL_HI16 |
| 5073 | ? R_MIPS_CALL_LO16 |
| 5074 | : R_MIPS_GOT_LO16)); |
| 5075 | |
| 5076 | offset = (h->dynindx - g->global_gotsym + g->local_gotno) * 4; |
| 5077 | BFD_ASSERT (g->local_gotno <= offset |
| 5078 | && offset < sgot->_raw_size); |
| 5079 | bfd_put_32 (output_bfd, relocation + addend, |
| 5080 | sgot->contents + offset); |
| 5081 | offset = (sgot->output_section->vma + sgot->output_offset |
| 5082 | + offset - gp); |
| 5083 | mips_elf_relocate_hi16 (input_bfd, rel, rel + 1, contents, |
| 5084 | offset); |
| 5085 | r = bfd_reloc_ok; |
| 5086 | } |
| 5087 | else if (r_type == R_MIPS_REL32 |
| 5088 | || r_type == R_MIPS_32) |
| 5089 | { |
| 5090 | Elf_Internal_Rel outrel; |
| 5091 | Elf32_crinfo cptrel; |
| 5092 | bfd_byte *cr; |
| 5093 | |
| 5094 | if ((info->shared |
| 5095 | || (elf_hash_table (info)->dynamic_sections_created |
| 5096 | && h != NULL |
| 5097 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) |
| 5098 | == 0))) |
| 5099 | && (input_section->flags & SEC_ALLOC) != 0) |
| 5100 | { |
| 5101 | boolean skip; |
| 5102 | |
| 5103 | /* When generating a shared object, these |
| 5104 | relocations are copied into the output file to be |
| 5105 | resolved at run time. */ |
| 5106 | if (sreloc == NULL) |
| 5107 | { |
| 5108 | sreloc = bfd_get_section_by_name (dynobj, ".rel.dyn"); |
| 5109 | BFD_ASSERT (sreloc != NULL); |
| 5110 | } |
| 5111 | |
| 5112 | skip = false; |
| 5113 | |
| 5114 | if (elf_section_data (input_section)->stab_info == NULL) |
| 5115 | outrel.r_offset = rel->r_offset; |
| 5116 | else |
| 5117 | { |
| 5118 | bfd_vma off; |
| 5119 | |
| 5120 | off = (_bfd_stab_section_offset |
| 5121 | (output_bfd, &elf_hash_table (info)->stab_info, |
| 5122 | input_section, |
| 5123 | &elf_section_data (input_section)->stab_info, |
| 5124 | rel->r_offset)); |
| 5125 | if (off == (bfd_vma) -1) |
| 5126 | skip = true; |
| 5127 | outrel.r_offset = off; |
| 5128 | } |
| 5129 | |
| 5130 | outrel.r_offset += (input_section->output_section->vma |
| 5131 | + input_section->output_offset); |
| 5132 | |
| 5133 | addend = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 5134 | |
| 5135 | if (skip) |
| 5136 | memset (&outrel, 0, sizeof outrel); |
| 5137 | else if (h != NULL |
| 5138 | && (! info->symbolic |
| 5139 | || (h->elf_link_hash_flags |
| 5140 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| 5141 | { |
| 5142 | BFD_ASSERT (h->dynindx != -1); |
| 5143 | outrel.r_info = ELF32_R_INFO (h->dynindx, R_MIPS_REL32); |
| 5144 | sec = input_section; |
| 5145 | } |
| 5146 | else |
| 5147 | { |
| 5148 | long indx; |
| 5149 | |
| 5150 | if (h == NULL) |
| 5151 | sec = local_sections[r_symndx]; |
| 5152 | else |
| 5153 | { |
| 5154 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
| 5155 | || (h->root.type |
| 5156 | == bfd_link_hash_defweak)); |
| 5157 | sec = h->root.u.def.section; |
| 5158 | } |
| 5159 | if (sec != NULL && bfd_is_abs_section (sec)) |
| 5160 | indx = 0; |
| 5161 | else if (sec == NULL || sec->owner == NULL) |
| 5162 | { |
| 5163 | bfd_set_error (bfd_error_bad_value); |
| 5164 | return false; |
| 5165 | } |
| 5166 | else |
| 5167 | { |
| 5168 | asection *osec; |
| 5169 | |
| 5170 | osec = sec->output_section; |
| 5171 | indx = elf_section_data (osec)->dynindx; |
| 5172 | if (indx == 0) |
| 5173 | abort (); |
| 5174 | } |
| 5175 | |
| 5176 | outrel.r_info = ELF32_R_INFO (indx, R_MIPS_REL32); |
| 5177 | addend += relocation; |
| 5178 | } |
| 5179 | |
| 5180 | if (! skip) |
| 5181 | bfd_put_32 (output_bfd, addend, contents + rel->r_offset); |
| 5182 | |
| 5183 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, |
| 5184 | (((Elf32_External_Rel *) |
| 5185 | sreloc->contents) |
| 5186 | + sreloc->reloc_count)); |
| 5187 | ++sreloc->reloc_count; |
| 5188 | |
| 5189 | if (! skip && SGI_COMPAT (output_bfd)) |
| 5190 | { |
| 5191 | if (scpt == NULL) |
| 5192 | continue; |
| 5193 | |
| 5194 | /* Make an entry of compact relocation info. */ |
| 5195 | mips_elf_set_cr_format (cptrel, CRF_MIPS_LONG); |
| 5196 | cptrel.vaddr = (rel->r_offset |
| 5197 | + input_section->output_section->vma |
| 5198 | + input_section->output_offset); |
| 5199 | if (r_type == R_MIPS_REL32) |
| 5200 | mips_elf_set_cr_type (cptrel, CRT_MIPS_REL32); |
| 5201 | else |
| 5202 | mips_elf_set_cr_type (cptrel, CRT_MIPS_WORD); |
| 5203 | mips_elf_set_cr_dist2to (cptrel, 0); |
| 5204 | cptrel.konst = addend; |
| 5205 | |
| 5206 | cr = (scpt->contents |
| 5207 | + sizeof (Elf32_External_compact_rel)); |
| 5208 | bfd_elf32_swap_crinfo_out (output_bfd, &cptrel, |
| 5209 | ((Elf32_External_crinfo *) cr |
| 5210 | + scpt->reloc_count)); |
| 5211 | ++scpt->reloc_count; |
| 5212 | } |
| 5213 | |
| 5214 | /* This reloc will be computed at runtime, so |
| 5215 | there's no need to do anything now. */ |
| 5216 | continue; |
| 5217 | } |
| 5218 | else |
| 5219 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 5220 | contents, rel->r_offset, |
| 5221 | relocation, addend); |
| 5222 | } |
| 5223 | else if (r_type == R_MIPS_64) |
| 5224 | { |
| 5225 | bfd_size_type addr; |
| 5226 | unsigned long val; |
| 5227 | |
| 5228 | /* Do a 32 bit relocation, and sign extend to 64 bits. */ |
| 5229 | addr = rel->r_offset; |
| 5230 | if (bfd_big_endian (input_bfd)) |
| 5231 | addr += 4; |
| 5232 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 5233 | contents, addr, relocation, |
| 5234 | addend); |
| 5235 | val = bfd_get_32 (input_bfd, contents + addr); |
| 5236 | if ((val & 0x80000000) != 0) |
| 5237 | val = 0xffffffff; |
| 5238 | else |
| 5239 | val = 0; |
| 5240 | addr = rel->r_offset; |
| 5241 | if (bfd_little_endian (input_bfd)) |
| 5242 | addr += 4; |
| 5243 | bfd_put_32 (input_bfd, val, contents + addr); |
| 5244 | } |
| 5245 | else if (r_type == R_MIPS_26 && other == STO_MIPS16) |
| 5246 | { |
| 5247 | unsigned long insn; |
| 5248 | |
| 5249 | /* This is a jump to a mips16 routine from a mips32 |
| 5250 | routine. We need to change jal into jalx. */ |
| 5251 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 5252 | if (((insn >> 26) & 0x3f) != 0x3 |
| 5253 | && ((insn >> 26) & 0x3f) != 0x1d) |
| 5254 | { |
| 5255 | (*_bfd_error_handler) |
| 5256 | ("%s: %s+0x%lx: jump to mips16 routine which is not jal", |
| 5257 | bfd_get_filename (input_bfd), |
| 5258 | input_section->name, |
| 5259 | (unsigned long) rel->r_offset); |
| 5260 | bfd_set_error (bfd_error_bad_value); |
| 5261 | return false; |
| 5262 | } |
| 5263 | insn = (insn & 0x3ffffff) | (0x1d << 26); |
| 5264 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); |
| 5265 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 5266 | contents, rel->r_offset, |
| 5267 | relocation, addend); |
| 5268 | } |
| 5269 | else if (r_type == R_MIPS16_26) |
| 5270 | { |
| 5271 | /* It's easiest to do the normal relocation, and then |
| 5272 | dig out the instruction and swap the first word the |
| 5273 | way the mips16 expects it. If this is little endian, |
| 5274 | though, we need to swap the two words first, and then |
| 5275 | swap them back again later, so that the address looks |
| 5276 | right. */ |
| 5277 | |
| 5278 | if (bfd_little_endian (input_bfd)) |
| 5279 | { |
| 5280 | unsigned long insn; |
| 5281 | |
| 5282 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 5283 | insn = ((insn >> 16) & 0xffff) | ((insn & 0xffff) << 16); |
| 5284 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); |
| 5285 | } |
| 5286 | |
| 5287 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 5288 | contents, rel->r_offset, |
| 5289 | relocation, addend); |
| 5290 | if (r == bfd_reloc_ok) |
| 5291 | { |
| 5292 | unsigned long insn; |
| 5293 | |
| 5294 | if (bfd_little_endian (input_bfd)) |
| 5295 | { |
| 5296 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 5297 | insn = ((insn >> 16) & 0xffff) | ((insn & 0xffff) << 16); |
| 5298 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); |
| 5299 | } |
| 5300 | |
| 5301 | insn = bfd_get_16 (input_bfd, contents + rel->r_offset); |
| 5302 | insn = ((insn & 0xfc00) |
| 5303 | | ((insn & 0x1f) << 5) |
| 5304 | | ((insn & 0x3e0) >> 5)); |
| 5305 | /* If this is a jump to a 32 bit routine, then make |
| 5306 | it jalx. */ |
| 5307 | if (other != STO_MIPS16) |
| 5308 | insn |= 0x400; |
| 5309 | bfd_put_16 (input_bfd, insn, contents + rel->r_offset); |
| 5310 | } |
| 5311 | } |
| 5312 | else if (r_type == R_MIPS16_GPREL) |
| 5313 | { |
| 5314 | unsigned short extend, insn; |
| 5315 | bfd_byte buf[4]; |
| 5316 | unsigned long final; |
| 5317 | |
| 5318 | /* Extract the addend into buf, run the regular reloc, |
| 5319 | and stuff the resulting value back into the |
| 5320 | instructions. */ |
| 5321 | if (rel->r_offset > input_section->_raw_size) |
| 5322 | r = bfd_reloc_outofrange; |
| 5323 | else |
| 5324 | { |
| 5325 | extend = bfd_get_16 (input_bfd, contents + rel->r_offset); |
| 5326 | insn = bfd_get_16 (input_bfd, contents + rel->r_offset + 2); |
| 5327 | bfd_put_32 (input_bfd, |
| 5328 | (((extend & 0x1f) << 11) |
| 5329 | | (extend & 0x7e0) |
| 5330 | | (insn & 0x1f)), |
| 5331 | buf); |
| 5332 | r = _bfd_final_link_relocate (howto, input_bfd, |
| 5333 | input_section, buf, |
| 5334 | (bfd_vma) 0, relocation, |
| 5335 | addend); |
| 5336 | final = bfd_get_32 (input_bfd, buf); |
| 5337 | bfd_put_16 (input_bfd, |
| 5338 | ((extend & 0xf800) |
| 5339 | | ((final >> 11) & 0x1f) |
| 5340 | | (final & 0x7e0)), |
| 5341 | contents + rel->r_offset); |
| 5342 | bfd_put_16 (input_bfd, |
| 5343 | ((insn & 0xffe0) |
| 5344 | | (final & 0x1f)), |
| 5345 | contents + rel->r_offset + 2); |
| 5346 | } |
| 5347 | } |
| 5348 | else |
| 5349 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 5350 | contents, rel->r_offset, |
| 5351 | relocation, addend); |
| 5352 | |
| 5353 | /* The jal instruction can only jump to an address which is |
| 5354 | divisible by 4, and it can only jump to an address with |
| 5355 | the same upper 4 bits as the PC. */ |
| 5356 | if (r == bfd_reloc_ok |
| 5357 | && (r_type == R_MIPS16_26 || r_type == R_MIPS_26)) |
| 5358 | { |
| 5359 | bfd_vma addr; |
| 5360 | |
| 5361 | addr = relocation; |
| 5362 | if (other == STO_MIPS16) |
| 5363 | addr &= ~ (bfd_vma) 1; |
| 5364 | addr += addend; |
| 5365 | if ((addr & 3) != 0 |
| 5366 | || ((addr & 0xf0000000) |
| 5367 | != ((input_section->output_section->vma |
| 5368 | + input_section->output_offset |
| 5369 | + rel->r_offset) |
| 5370 | & 0xf0000000))) |
| 5371 | r = bfd_reloc_overflow; |
| 5372 | } |
| 5373 | |
| 5374 | if (SGI_COMPAT (abfd) |
| 5375 | && scpt != NULL |
| 5376 | && (input_section->flags & SEC_ALLOC) != 0) |
| 5377 | { |
| 5378 | Elf32_crinfo cptrel; |
| 5379 | bfd_byte *cr; |
| 5380 | |
| 5381 | /* Make an entry of compact relocation info. */ |
| 5382 | mips_elf_set_cr_format (cptrel, CRF_MIPS_LONG); |
| 5383 | cptrel.vaddr = (rel->r_offset |
| 5384 | + input_section->output_section->vma |
| 5385 | + input_section->output_offset); |
| 5386 | |
| 5387 | switch (r_type) |
| 5388 | { |
| 5389 | case R_MIPS_26: |
| 5390 | mips_elf_set_cr_type (cptrel, CRT_MIPS_JMPAD); |
| 5391 | /* XXX How should we set dist2to in this case. */ |
| 5392 | mips_elf_set_cr_dist2to (cptrel, 8); |
| 5393 | cptrel.konst = addend + relocation; |
| 5394 | cr = scpt->contents + sizeof (Elf32_External_compact_rel); |
| 5395 | bfd_elf32_swap_crinfo_out (output_bfd, &cptrel, |
| 5396 | ((Elf32_External_crinfo *) cr |
| 5397 | + scpt->reloc_count)); |
| 5398 | ++scpt->reloc_count; |
| 5399 | break; |
| 5400 | |
| 5401 | case R_MIPS_GPREL16: |
| 5402 | case R_MIPS_LITERAL: |
| 5403 | case R_MIPS_GPREL32: |
| 5404 | mips_elf_set_cr_type (cptrel, CRT_MIPS_GPHI_LO); |
| 5405 | cptrel.konst = gp - cptrel.vaddr; |
| 5406 | mips_elf_set_cr_dist2to (cptrel, 4); |
| 5407 | cr = scpt->contents + sizeof (Elf32_External_compact_rel); |
| 5408 | bfd_elf32_swap_crinfo_out (output_bfd, &cptrel, |
| 5409 | ((Elf32_External_crinfo *) cr |
| 5410 | + scpt->reloc_count)); |
| 5411 | ++scpt->reloc_count; |
| 5412 | break; |
| 5413 | |
| 5414 | default: |
| 5415 | break; |
| 5416 | } |
| 5417 | } |
| 5418 | } |
| 5419 | |
| 5420 | if (r != bfd_reloc_ok) |
| 5421 | { |
| 5422 | switch (r) |
| 5423 | { |
| 5424 | default: |
| 5425 | case bfd_reloc_outofrange: |
| 5426 | abort (); |
| 5427 | case bfd_reloc_overflow: |
| 5428 | { |
| 5429 | const char *name; |
| 5430 | |
| 5431 | if (h != NULL) |
| 5432 | name = h->root.root.string; |
| 5433 | else |
| 5434 | { |
| 5435 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 5436 | symtab_hdr->sh_link, |
| 5437 | sym->st_name); |
| 5438 | if (name == NULL) |
| 5439 | return false; |
| 5440 | if (*name == '\0') |
| 5441 | name = bfd_section_name (input_bfd, sec); |
| 5442 | } |
| 5443 | if (! ((*info->callbacks->reloc_overflow) |
| 5444 | (info, name, howto->name, (bfd_vma) 0, |
| 5445 | input_bfd, input_section, rel->r_offset))) |
| 5446 | return false; |
| 5447 | } |
| 5448 | break; |
| 5449 | } |
| 5450 | } |
| 5451 | } |
| 5452 | |
| 5453 | return true; |
| 5454 | } |
| 5455 | |
| 5456 | /* This hook function is called before the linker writes out a global |
| 5457 | symbol. We mark symbols as small common if appropriate. This is |
| 5458 | also where we undo the increment of the value for a mips16 symbol. */ |
| 5459 | |
| 5460 | /*ARGSIGNORED*/ |
| 5461 | static boolean |
| 5462 | mips_elf_link_output_symbol_hook (abfd, info, name, sym, input_sec) |
| 5463 | bfd *abfd; |
| 5464 | struct bfd_link_info *info; |
| 5465 | const char *name; |
| 5466 | Elf_Internal_Sym *sym; |
| 5467 | asection *input_sec; |
| 5468 | { |
| 5469 | /* If we see a common symbol, which implies a relocatable link, then |
| 5470 | if a symbol was small common in an input file, mark it as small |
| 5471 | common in the output file. */ |
| 5472 | if (sym->st_shndx == SHN_COMMON |
| 5473 | && strcmp (input_sec->name, ".scommon") == 0) |
| 5474 | sym->st_shndx = SHN_MIPS_SCOMMON; |
| 5475 | |
| 5476 | if (sym->st_other == STO_MIPS16 |
| 5477 | && (sym->st_value & 1) != 0) |
| 5478 | --sym->st_value; |
| 5479 | |
| 5480 | return true; |
| 5481 | } |
| 5482 | \f |
| 5483 | /* Functions for the dynamic linker. */ |
| 5484 | |
| 5485 | /* The name of the dynamic interpreter. This is put in the .interp |
| 5486 | section. */ |
| 5487 | |
| 5488 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" |
| 5489 | |
| 5490 | /* Create dynamic sections when linking against a dynamic object. */ |
| 5491 | |
| 5492 | static boolean |
| 5493 | mips_elf_create_dynamic_sections (abfd, info) |
| 5494 | bfd *abfd; |
| 5495 | struct bfd_link_info *info; |
| 5496 | { |
| 5497 | struct elf_link_hash_entry *h; |
| 5498 | flagword flags; |
| 5499 | register asection *s; |
| 5500 | const char * const *namep; |
| 5501 | |
| 5502 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 5503 | | SEC_LINKER_CREATED | SEC_READONLY); |
| 5504 | |
| 5505 | /* Mips ABI requests the .dynamic section to be read only. */ |
| 5506 | s = bfd_get_section_by_name (abfd, ".dynamic"); |
| 5507 | if (s != NULL) |
| 5508 | { |
| 5509 | if (! bfd_set_section_flags (abfd, s, flags)) |
| 5510 | return false; |
| 5511 | } |
| 5512 | |
| 5513 | /* We need to create .got section. */ |
| 5514 | if (! mips_elf_create_got_section (abfd, info)) |
| 5515 | return false; |
| 5516 | |
| 5517 | /* Create .stub section. */ |
| 5518 | if (bfd_get_section_by_name (abfd, ".stub") == NULL) |
| 5519 | { |
| 5520 | s = bfd_make_section (abfd, ".stub"); |
| 5521 | if (s == NULL |
| 5522 | || ! bfd_set_section_flags (abfd, s, flags) |
| 5523 | || ! bfd_set_section_alignment (abfd, s, 2)) |
| 5524 | return false; |
| 5525 | } |
| 5526 | |
| 5527 | if (SGI_COMPAT (abfd) |
| 5528 | && !info->shared |
| 5529 | && bfd_get_section_by_name (abfd, ".rld_map") == NULL) |
| 5530 | { |
| 5531 | s = bfd_make_section (abfd, ".rld_map"); |
| 5532 | if (s == NULL |
| 5533 | || ! bfd_set_section_flags (abfd, s, flags & ~SEC_READONLY) |
| 5534 | || ! bfd_set_section_alignment (abfd, s, 2)) |
| 5535 | return false; |
| 5536 | } |
| 5537 | |
| 5538 | if (SGI_COMPAT (abfd)) |
| 5539 | { |
| 5540 | for (namep = mips_elf_dynsym_rtproc_names; *namep != NULL; namep++) |
| 5541 | { |
| 5542 | h = NULL; |
| 5543 | if (! (_bfd_generic_link_add_one_symbol |
| 5544 | (info, abfd, *namep, BSF_GLOBAL, bfd_und_section_ptr, |
| 5545 | (bfd_vma) 0, (const char *) NULL, false, |
| 5546 | get_elf_backend_data (abfd)->collect, |
| 5547 | (struct bfd_link_hash_entry **) &h))) |
| 5548 | return false; |
| 5549 | h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF; |
| 5550 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
| 5551 | h->type = STT_SECTION; |
| 5552 | |
| 5553 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 5554 | return false; |
| 5555 | } |
| 5556 | |
| 5557 | /* We need to create a .compact_rel section. */ |
| 5558 | if (! mips_elf_create_compact_rel_section (abfd, info)) |
| 5559 | return false; |
| 5560 | |
| 5561 | /* Change aligments of some sections. */ |
| 5562 | s = bfd_get_section_by_name (abfd, ".hash"); |
| 5563 | if (s != NULL) |
| 5564 | bfd_set_section_alignment (abfd, s, 4); |
| 5565 | s = bfd_get_section_by_name (abfd, ".dynsym"); |
| 5566 | if (s != NULL) |
| 5567 | bfd_set_section_alignment (abfd, s, 4); |
| 5568 | s = bfd_get_section_by_name (abfd, ".dynstr"); |
| 5569 | if (s != NULL) |
| 5570 | bfd_set_section_alignment (abfd, s, 4); |
| 5571 | s = bfd_get_section_by_name (abfd, ".reginfo"); |
| 5572 | if (s != NULL) |
| 5573 | bfd_set_section_alignment (abfd, s, 4); |
| 5574 | s = bfd_get_section_by_name (abfd, ".dynamic"); |
| 5575 | if (s != NULL) |
| 5576 | bfd_set_section_alignment (abfd, s, 4); |
| 5577 | } |
| 5578 | |
| 5579 | if (!info->shared) |
| 5580 | { |
| 5581 | h = NULL; |
| 5582 | if (! (_bfd_generic_link_add_one_symbol |
| 5583 | (info, abfd, "_DYNAMIC_LINK", BSF_GLOBAL, bfd_abs_section_ptr, |
| 5584 | (bfd_vma) 0, (const char *) NULL, false, |
| 5585 | get_elf_backend_data (abfd)->collect, |
| 5586 | (struct bfd_link_hash_entry **) &h))) |
| 5587 | return false; |
| 5588 | h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF; |
| 5589 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
| 5590 | h->type = STT_SECTION; |
| 5591 | |
| 5592 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 5593 | return false; |
| 5594 | |
| 5595 | if (! mips_elf_hash_table (info)->use_rld_obj_head) |
| 5596 | { |
| 5597 | /* __rld_map is a four byte word located in the .data section |
| 5598 | and is filled in by the rtld to contain a pointer to |
| 5599 | the _r_debug structure. Its symbol value will be set in |
| 5600 | mips_elf_finish_dynamic_symbol. */ |
| 5601 | s = bfd_get_section_by_name (abfd, ".rld_map"); |
| 5602 | BFD_ASSERT (s != NULL); |
| 5603 | |
| 5604 | h = NULL; |
| 5605 | if (! (_bfd_generic_link_add_one_symbol |
| 5606 | (info, abfd, "__rld_map", BSF_GLOBAL, s, |
| 5607 | (bfd_vma) 0, (const char *) NULL, false, |
| 5608 | get_elf_backend_data (abfd)->collect, |
| 5609 | (struct bfd_link_hash_entry **) &h))) |
| 5610 | return false; |
| 5611 | h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF; |
| 5612 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
| 5613 | h->type = STT_OBJECT; |
| 5614 | |
| 5615 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 5616 | return false; |
| 5617 | } |
| 5618 | } |
| 5619 | |
| 5620 | return true; |
| 5621 | } |
| 5622 | |
| 5623 | /* Create the .compact_rel section. */ |
| 5624 | |
| 5625 | static boolean |
| 5626 | mips_elf_create_compact_rel_section (abfd, info) |
| 5627 | bfd *abfd; |
| 5628 | struct bfd_link_info *info; |
| 5629 | { |
| 5630 | flagword flags; |
| 5631 | register asection *s; |
| 5632 | |
| 5633 | if (bfd_get_section_by_name (abfd, ".compact_rel") == NULL) |
| 5634 | { |
| 5635 | flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED |
| 5636 | | SEC_READONLY); |
| 5637 | |
| 5638 | s = bfd_make_section (abfd, ".compact_rel"); |
| 5639 | if (s == NULL |
| 5640 | || ! bfd_set_section_flags (abfd, s, flags) |
| 5641 | || ! bfd_set_section_alignment (abfd, s, 2)) |
| 5642 | return false; |
| 5643 | |
| 5644 | s->_raw_size = sizeof (Elf32_External_compact_rel); |
| 5645 | } |
| 5646 | |
| 5647 | return true; |
| 5648 | } |
| 5649 | |
| 5650 | /* Create the .got section to hold the global offset table. */ |
| 5651 | |
| 5652 | static boolean |
| 5653 | mips_elf_create_got_section (abfd, info) |
| 5654 | bfd *abfd; |
| 5655 | struct bfd_link_info *info; |
| 5656 | { |
| 5657 | flagword flags; |
| 5658 | register asection *s; |
| 5659 | struct elf_link_hash_entry *h; |
| 5660 | struct mips_got_info *g; |
| 5661 | |
| 5662 | /* This function may be called more than once. */ |
| 5663 | if (bfd_get_section_by_name (abfd, ".got") != NULL) |
| 5664 | return true; |
| 5665 | |
| 5666 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 5667 | | SEC_LINKER_CREATED); |
| 5668 | |
| 5669 | s = bfd_make_section (abfd, ".got"); |
| 5670 | if (s == NULL |
| 5671 | || ! bfd_set_section_flags (abfd, s, flags) |
| 5672 | || ! bfd_set_section_alignment (abfd, s, 4)) |
| 5673 | return false; |
| 5674 | |
| 5675 | /* Define the symbol _GLOBAL_OFFSET_TABLE_. We don't do this in the |
| 5676 | linker script because we don't want to define the symbol if we |
| 5677 | are not creating a global offset table. */ |
| 5678 | h = NULL; |
| 5679 | if (! (_bfd_generic_link_add_one_symbol |
| 5680 | (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s, |
| 5681 | (bfd_vma) 0, (const char *) NULL, false, |
| 5682 | get_elf_backend_data (abfd)->collect, |
| 5683 | (struct bfd_link_hash_entry **) &h))) |
| 5684 | return false; |
| 5685 | h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF; |
| 5686 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
| 5687 | h->type = STT_OBJECT; |
| 5688 | |
| 5689 | if (info->shared |
| 5690 | && ! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 5691 | return false; |
| 5692 | |
| 5693 | /* The first several global offset table entries are reserved. */ |
| 5694 | s->_raw_size = MIPS_RESERVED_GOTNO * 4; |
| 5695 | |
| 5696 | g = (struct mips_got_info *) bfd_alloc (abfd, |
| 5697 | sizeof (struct mips_got_info)); |
| 5698 | if (g == NULL) |
| 5699 | return false; |
| 5700 | g->global_gotsym = 0; |
| 5701 | g->local_gotno = MIPS_RESERVED_GOTNO; |
| 5702 | g->assigned_gotno = MIPS_RESERVED_GOTNO; |
| 5703 | if (elf_section_data (s) == NULL) |
| 5704 | { |
| 5705 | s->used_by_bfd = |
| 5706 | (PTR) bfd_zalloc (abfd, sizeof (struct bfd_elf_section_data)); |
| 5707 | if (elf_section_data (s) == NULL) |
| 5708 | return false; |
| 5709 | } |
| 5710 | elf_section_data (s)->tdata = (PTR) g; |
| 5711 | |
| 5712 | return true; |
| 5713 | } |
| 5714 | |
| 5715 | /* Look through the relocs for a section during the first phase, and |
| 5716 | allocate space in the global offset table. */ |
| 5717 | |
| 5718 | static boolean |
| 5719 | mips_elf_check_relocs (abfd, info, sec, relocs) |
| 5720 | bfd *abfd; |
| 5721 | struct bfd_link_info *info; |
| 5722 | asection *sec; |
| 5723 | const Elf_Internal_Rela *relocs; |
| 5724 | { |
| 5725 | const char *name; |
| 5726 | bfd *dynobj; |
| 5727 | Elf_Internal_Shdr *symtab_hdr; |
| 5728 | struct elf_link_hash_entry **sym_hashes; |
| 5729 | struct mips_got_info *g; |
| 5730 | size_t extsymoff; |
| 5731 | const Elf_Internal_Rela *rel; |
| 5732 | const Elf_Internal_Rela *rel_end; |
| 5733 | asection *sgot; |
| 5734 | asection *sreloc; |
| 5735 | |
| 5736 | if (info->relocateable) |
| 5737 | return true; |
| 5738 | |
| 5739 | dynobj = elf_hash_table (info)->dynobj; |
| 5740 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 5741 | sym_hashes = elf_sym_hashes (abfd); |
| 5742 | extsymoff = (elf_bad_symtab (abfd)) ? 0 : symtab_hdr->sh_info; |
| 5743 | |
| 5744 | /* Check for the mips16 stub sections. */ |
| 5745 | |
| 5746 | name = bfd_get_section_name (abfd, sec); |
| 5747 | if (strncmp (name, FN_STUB, sizeof FN_STUB - 1) == 0) |
| 5748 | { |
| 5749 | unsigned long r_symndx; |
| 5750 | |
| 5751 | /* Look at the relocation information to figure out which symbol |
| 5752 | this is for. */ |
| 5753 | |
| 5754 | r_symndx = ELF32_R_SYM (relocs->r_info); |
| 5755 | |
| 5756 | if (r_symndx < extsymoff |
| 5757 | || sym_hashes[r_symndx - extsymoff] == NULL) |
| 5758 | { |
| 5759 | asection *o; |
| 5760 | |
| 5761 | /* This stub is for a local symbol. This stub will only be |
| 5762 | needed if there is some relocation in this BFD, other |
| 5763 | than a 16 bit function call, which refers to this symbol. */ |
| 5764 | for (o = abfd->sections; o != NULL; o = o->next) |
| 5765 | { |
| 5766 | Elf_Internal_Rela *sec_relocs; |
| 5767 | const Elf_Internal_Rela *r, *rend; |
| 5768 | |
| 5769 | /* We can ignore stub sections when looking for relocs. */ |
| 5770 | if ((o->flags & SEC_RELOC) == 0 |
| 5771 | || o->reloc_count == 0 |
| 5772 | || strncmp (bfd_get_section_name (abfd, o), FN_STUB, |
| 5773 | sizeof FN_STUB - 1) == 0 |
| 5774 | || strncmp (bfd_get_section_name (abfd, o), CALL_STUB, |
| 5775 | sizeof CALL_STUB - 1) == 0 |
| 5776 | || strncmp (bfd_get_section_name (abfd, o), CALL_FP_STUB, |
| 5777 | sizeof CALL_FP_STUB - 1) == 0) |
| 5778 | continue; |
| 5779 | |
| 5780 | sec_relocs = (_bfd_elf32_link_read_relocs |
| 5781 | (abfd, o, (PTR) NULL, |
| 5782 | (Elf_Internal_Rela *) NULL, |
| 5783 | info->keep_memory)); |
| 5784 | if (sec_relocs == NULL) |
| 5785 | return false; |
| 5786 | |
| 5787 | rend = sec_relocs + o->reloc_count; |
| 5788 | for (r = sec_relocs; r < rend; r++) |
| 5789 | if (ELF32_R_SYM (r->r_info) == r_symndx |
| 5790 | && ELF32_R_TYPE (r->r_info) != R_MIPS16_26) |
| 5791 | break; |
| 5792 | |
| 5793 | if (! info->keep_memory) |
| 5794 | free (sec_relocs); |
| 5795 | |
| 5796 | if (r < rend) |
| 5797 | break; |
| 5798 | } |
| 5799 | |
| 5800 | if (o == NULL) |
| 5801 | { |
| 5802 | /* There is no non-call reloc for this stub, so we do |
| 5803 | not need it. Since this function is called before |
| 5804 | the linker maps input sections to output sections, we |
| 5805 | can easily discard it by setting the SEC_EXCLUDE |
| 5806 | flag. */ |
| 5807 | sec->flags |= SEC_EXCLUDE; |
| 5808 | return true; |
| 5809 | } |
| 5810 | |
| 5811 | /* Record this stub in an array of local symbol stubs for |
| 5812 | this BFD. */ |
| 5813 | if (elf_tdata (abfd)->local_stubs == NULL) |
| 5814 | { |
| 5815 | unsigned long symcount; |
| 5816 | asection **n; |
| 5817 | |
| 5818 | if (elf_bad_symtab (abfd)) |
| 5819 | symcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym); |
| 5820 | else |
| 5821 | symcount = symtab_hdr->sh_info; |
| 5822 | n = (asection **) bfd_zalloc (abfd, |
| 5823 | symcount * sizeof (asection *)); |
| 5824 | if (n == NULL) |
| 5825 | return false; |
| 5826 | elf_tdata (abfd)->local_stubs = n; |
| 5827 | } |
| 5828 | |
| 5829 | elf_tdata (abfd)->local_stubs[r_symndx] = sec; |
| 5830 | |
| 5831 | /* We don't need to set mips16_stubs_seen in this case. |
| 5832 | That flag is used to see whether we need to look through |
| 5833 | the global symbol table for stubs. We don't need to set |
| 5834 | it here, because we just have a local stub. */ |
| 5835 | } |
| 5836 | else |
| 5837 | { |
| 5838 | struct mips_elf_link_hash_entry *h; |
| 5839 | |
| 5840 | h = ((struct mips_elf_link_hash_entry *) |
| 5841 | sym_hashes[r_symndx - extsymoff]); |
| 5842 | |
| 5843 | /* H is the symbol this stub is for. */ |
| 5844 | |
| 5845 | h->fn_stub = sec; |
| 5846 | mips_elf_hash_table (info)->mips16_stubs_seen = true; |
| 5847 | } |
| 5848 | } |
| 5849 | else if (strncmp (name, CALL_STUB, sizeof CALL_STUB - 1) == 0 |
| 5850 | || strncmp (name, CALL_FP_STUB, sizeof CALL_FP_STUB - 1) == 0) |
| 5851 | { |
| 5852 | unsigned long r_symndx; |
| 5853 | struct mips_elf_link_hash_entry *h; |
| 5854 | asection **loc; |
| 5855 | |
| 5856 | /* Look at the relocation information to figure out which symbol |
| 5857 | this is for. */ |
| 5858 | |
| 5859 | r_symndx = ELF32_R_SYM (relocs->r_info); |
| 5860 | |
| 5861 | if (r_symndx < extsymoff |
| 5862 | || sym_hashes[r_symndx - extsymoff] == NULL) |
| 5863 | { |
| 5864 | /* This stub was actually built for a static symbol defined |
| 5865 | in the same file. We assume that all static symbols in |
| 5866 | mips16 code are themselves mips16, so we can simply |
| 5867 | discard this stub. Since this function is called before |
| 5868 | the linker maps input sections to output sections, we can |
| 5869 | easily discard it by setting the SEC_EXCLUDE flag. */ |
| 5870 | sec->flags |= SEC_EXCLUDE; |
| 5871 | return true; |
| 5872 | } |
| 5873 | |
| 5874 | h = ((struct mips_elf_link_hash_entry *) |
| 5875 | sym_hashes[r_symndx - extsymoff]); |
| 5876 | |
| 5877 | /* H is the symbol this stub is for. */ |
| 5878 | |
| 5879 | if (strncmp (name, CALL_FP_STUB, sizeof CALL_FP_STUB - 1) == 0) |
| 5880 | loc = &h->call_fp_stub; |
| 5881 | else |
| 5882 | loc = &h->call_stub; |
| 5883 | |
| 5884 | /* If we already have an appropriate stub for this function, we |
| 5885 | don't need another one, so we can discard this one. Since |
| 5886 | this function is called before the linker maps input sections |
| 5887 | to output sections, we can easily discard it by setting the |
| 5888 | SEC_EXCLUDE flag. We can also discard this section if we |
| 5889 | happen to already know that this is a mips16 function; it is |
| 5890 | not necessary to check this here, as it is checked later, but |
| 5891 | it is slightly faster to check now. */ |
| 5892 | if (*loc != NULL || h->root.other == STO_MIPS16) |
| 5893 | { |
| 5894 | sec->flags |= SEC_EXCLUDE; |
| 5895 | return true; |
| 5896 | } |
| 5897 | |
| 5898 | *loc = sec; |
| 5899 | mips_elf_hash_table (info)->mips16_stubs_seen = true; |
| 5900 | } |
| 5901 | |
| 5902 | if (dynobj == NULL) |
| 5903 | { |
| 5904 | sgot = NULL; |
| 5905 | g = NULL; |
| 5906 | } |
| 5907 | else |
| 5908 | { |
| 5909 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 5910 | if (sgot == NULL) |
| 5911 | g = NULL; |
| 5912 | else |
| 5913 | { |
| 5914 | BFD_ASSERT (elf_section_data (sgot) != NULL); |
| 5915 | g = (struct mips_got_info *) elf_section_data (sgot)->tdata; |
| 5916 | BFD_ASSERT (g != NULL); |
| 5917 | } |
| 5918 | } |
| 5919 | |
| 5920 | sreloc = NULL; |
| 5921 | |
| 5922 | rel_end = relocs + sec->reloc_count; |
| 5923 | for (rel = relocs; rel < rel_end; rel++) |
| 5924 | { |
| 5925 | unsigned long r_symndx; |
| 5926 | struct elf_link_hash_entry *h; |
| 5927 | |
| 5928 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 5929 | |
| 5930 | if (r_symndx < extsymoff) |
| 5931 | h = NULL; |
| 5932 | else |
| 5933 | { |
| 5934 | h = sym_hashes[r_symndx - extsymoff]; |
| 5935 | |
| 5936 | /* This may be an indirect symbol created because of a version. */ |
| 5937 | if (h != NULL) |
| 5938 | { |
| 5939 | while (h->root.type == bfd_link_hash_indirect) |
| 5940 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 5941 | } |
| 5942 | } |
| 5943 | |
| 5944 | /* Some relocs require a global offset table. */ |
| 5945 | if (dynobj == NULL || sgot == NULL) |
| 5946 | { |
| 5947 | switch (ELF32_R_TYPE (rel->r_info)) |
| 5948 | { |
| 5949 | case R_MIPS_GOT16: |
| 5950 | case R_MIPS_CALL16: |
| 5951 | case R_MIPS_CALL_HI16: |
| 5952 | case R_MIPS_CALL_LO16: |
| 5953 | case R_MIPS_GOT_HI16: |
| 5954 | case R_MIPS_GOT_LO16: |
| 5955 | if (dynobj == NULL) |
| 5956 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 5957 | if (! mips_elf_create_got_section (dynobj, info)) |
| 5958 | return false; |
| 5959 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 5960 | BFD_ASSERT (sgot != NULL); |
| 5961 | BFD_ASSERT (elf_section_data (sgot) != NULL); |
| 5962 | g = (struct mips_got_info *) elf_section_data (sgot)->tdata; |
| 5963 | BFD_ASSERT (g != NULL); |
| 5964 | break; |
| 5965 | |
| 5966 | case R_MIPS_32: |
| 5967 | case R_MIPS_REL32: |
| 5968 | if (dynobj == NULL |
| 5969 | && (info->shared || h != NULL) |
| 5970 | && (sec->flags & SEC_ALLOC) != 0) |
| 5971 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 5972 | break; |
| 5973 | |
| 5974 | default: |
| 5975 | break; |
| 5976 | } |
| 5977 | } |
| 5978 | |
| 5979 | switch (ELF32_R_TYPE (rel->r_info)) |
| 5980 | { |
| 5981 | case R_MIPS_CALL16: |
| 5982 | case R_MIPS_CALL_HI16: |
| 5983 | case R_MIPS_CALL_LO16: |
| 5984 | /* This symbol requires a global offset table entry. */ |
| 5985 | |
| 5986 | if (h == NULL) |
| 5987 | { |
| 5988 | (*_bfd_error_handler) |
| 5989 | ("%s: CALL16 reloc at 0x%lx not against global symbol", |
| 5990 | bfd_get_filename (abfd), (unsigned long) rel->r_offset); |
| 5991 | bfd_set_error (bfd_error_bad_value); |
| 5992 | return false; |
| 5993 | } |
| 5994 | |
| 5995 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 5996 | if (h->dynindx == -1) |
| 5997 | { |
| 5998 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 5999 | return false; |
| 6000 | } |
| 6001 | |
| 6002 | if (h->got_offset != (bfd_vma) -1) |
| 6003 | { |
| 6004 | /* We have already allocated space in the .got. */ |
| 6005 | break; |
| 6006 | } |
| 6007 | |
| 6008 | /* Note the index of the first global got symbol in .dynsym. */ |
| 6009 | if (g->global_gotsym == 0 |
| 6010 | || g->global_gotsym > (unsigned long) h->dynindx) |
| 6011 | g->global_gotsym = h->dynindx; |
| 6012 | |
| 6013 | /* Make this symbol to have the corresponding got entry. */ |
| 6014 | h->got_offset = 0; |
| 6015 | |
| 6016 | /* We need a stub, not a plt entry for the undefined |
| 6017 | function. But we record it as if it needs plt. See |
| 6018 | elf_adjust_dynamic_symbol in elflink.h. */ |
| 6019 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 6020 | h->type = STT_FUNC; |
| 6021 | |
| 6022 | break; |
| 6023 | |
| 6024 | case R_MIPS_GOT16: |
| 6025 | case R_MIPS_GOT_HI16: |
| 6026 | case R_MIPS_GOT_LO16: |
| 6027 | /* This symbol requires a global offset table entry. */ |
| 6028 | |
| 6029 | if (h != NULL) |
| 6030 | { |
| 6031 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 6032 | if (h->dynindx == -1) |
| 6033 | { |
| 6034 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 6035 | return false; |
| 6036 | } |
| 6037 | |
| 6038 | if (h->got_offset != (bfd_vma) -1) |
| 6039 | { |
| 6040 | /* We have already allocated space in the .got. */ |
| 6041 | break; |
| 6042 | } |
| 6043 | /* Note the index of the first global got symbol in |
| 6044 | .dynsym. */ |
| 6045 | if (g->global_gotsym == 0 |
| 6046 | || g->global_gotsym > (unsigned long) h->dynindx) |
| 6047 | g->global_gotsym = h->dynindx; |
| 6048 | |
| 6049 | /* Make this symbol to be the global got symbol. */ |
| 6050 | h->got_offset = 0; |
| 6051 | } |
| 6052 | |
| 6053 | break; |
| 6054 | |
| 6055 | case R_MIPS_32: |
| 6056 | case R_MIPS_REL32: |
| 6057 | if ((info->shared || h != NULL) |
| 6058 | && (sec->flags & SEC_ALLOC) != 0) |
| 6059 | { |
| 6060 | if (sreloc == NULL) |
| 6061 | { |
| 6062 | const char *name = ".rel.dyn"; |
| 6063 | |
| 6064 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 6065 | if (sreloc == NULL) |
| 6066 | { |
| 6067 | sreloc = bfd_make_section (dynobj, name); |
| 6068 | if (sreloc == NULL |
| 6069 | || ! bfd_set_section_flags (dynobj, sreloc, |
| 6070 | (SEC_ALLOC |
| 6071 | | SEC_LOAD |
| 6072 | | SEC_HAS_CONTENTS |
| 6073 | | SEC_IN_MEMORY |
| 6074 | | SEC_LINKER_CREATED |
| 6075 | | SEC_READONLY)) |
| 6076 | || ! bfd_set_section_alignment (dynobj, sreloc, |
| 6077 | 4)) |
| 6078 | return false; |
| 6079 | } |
| 6080 | } |
| 6081 | if (info->shared) |
| 6082 | { |
| 6083 | /* When creating a shared object, we must copy these |
| 6084 | reloc types into the output file as R_MIPS_REL32 |
| 6085 | relocs. We make room for this reloc in the |
| 6086 | .rel.dyn reloc section */ |
| 6087 | if (sreloc->_raw_size == 0) |
| 6088 | { |
| 6089 | /* Add a null element. */ |
| 6090 | sreloc->_raw_size += sizeof (Elf32_External_Rel); |
| 6091 | ++sreloc->reloc_count; |
| 6092 | } |
| 6093 | sreloc->_raw_size += sizeof (Elf32_External_Rel); |
| 6094 | } |
| 6095 | else |
| 6096 | { |
| 6097 | struct mips_elf_link_hash_entry *hmips; |
| 6098 | |
| 6099 | /* We only need to copy this reloc if the symbol is |
| 6100 | defined in a dynamic object. */ |
| 6101 | hmips = (struct mips_elf_link_hash_entry *) h; |
| 6102 | ++hmips->mips_32_relocs; |
| 6103 | } |
| 6104 | } |
| 6105 | |
| 6106 | if (SGI_COMPAT (abfd)) |
| 6107 | mips_elf_hash_table (info)->compact_rel_size += |
| 6108 | sizeof (Elf32_External_crinfo); |
| 6109 | |
| 6110 | break; |
| 6111 | |
| 6112 | case R_MIPS_26: |
| 6113 | case R_MIPS_GPREL16: |
| 6114 | case R_MIPS_LITERAL: |
| 6115 | case R_MIPS_GPREL32: |
| 6116 | if (SGI_COMPAT (abfd)) |
| 6117 | mips_elf_hash_table (info)->compact_rel_size += |
| 6118 | sizeof (Elf32_External_crinfo); |
| 6119 | break; |
| 6120 | |
| 6121 | default: |
| 6122 | break; |
| 6123 | } |
| 6124 | |
| 6125 | /* If this reloc is not a 16 bit call, and it has a global |
| 6126 | symbol, then we will need the fn_stub if there is one. |
| 6127 | References from a stub section do not count. */ |
| 6128 | if (h != NULL |
| 6129 | && ELF32_R_TYPE (rel->r_info) != R_MIPS16_26 |
| 6130 | && strncmp (bfd_get_section_name (abfd, sec), FN_STUB, |
| 6131 | sizeof FN_STUB - 1) != 0 |
| 6132 | && strncmp (bfd_get_section_name (abfd, sec), CALL_STUB, |
| 6133 | sizeof CALL_STUB - 1) != 0 |
| 6134 | && strncmp (bfd_get_section_name (abfd, sec), CALL_FP_STUB, |
| 6135 | sizeof CALL_FP_STUB - 1) != 0) |
| 6136 | { |
| 6137 | struct mips_elf_link_hash_entry *mh; |
| 6138 | |
| 6139 | mh = (struct mips_elf_link_hash_entry *) h; |
| 6140 | mh->need_fn_stub = true; |
| 6141 | } |
| 6142 | } |
| 6143 | |
| 6144 | return true; |
| 6145 | } |
| 6146 | |
| 6147 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 6148 | regular object. The current definition is in some section of the |
| 6149 | dynamic object, but we're not including those sections. We have to |
| 6150 | change the definition to something the rest of the link can |
| 6151 | understand. */ |
| 6152 | |
| 6153 | static boolean |
| 6154 | mips_elf_adjust_dynamic_symbol (info, h) |
| 6155 | struct bfd_link_info *info; |
| 6156 | struct elf_link_hash_entry *h; |
| 6157 | { |
| 6158 | bfd *dynobj; |
| 6159 | struct mips_elf_link_hash_entry *hmips; |
| 6160 | asection *s; |
| 6161 | |
| 6162 | dynobj = elf_hash_table (info)->dynobj; |
| 6163 | |
| 6164 | /* Make sure we know what is going on here. */ |
| 6165 | BFD_ASSERT (dynobj != NULL |
| 6166 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) |
| 6167 | || h->weakdef != NULL |
| 6168 | || ((h->elf_link_hash_flags |
| 6169 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 6170 | && (h->elf_link_hash_flags |
| 6171 | & ELF_LINK_HASH_REF_REGULAR) != 0 |
| 6172 | && (h->elf_link_hash_flags |
| 6173 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); |
| 6174 | |
| 6175 | /* If this symbol is defined in a dynamic object, we need to copy |
| 6176 | any R_MIPS_32 or R_MIPS_REL32 relocs against it into the output |
| 6177 | file. */ |
| 6178 | hmips = (struct mips_elf_link_hash_entry *) h; |
| 6179 | if (! info->relocateable |
| 6180 | && hmips->mips_32_relocs != 0 |
| 6181 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 6182 | { |
| 6183 | s = bfd_get_section_by_name (dynobj, ".rel.dyn"); |
| 6184 | BFD_ASSERT (s != NULL); |
| 6185 | |
| 6186 | if (s->_raw_size == 0) |
| 6187 | { |
| 6188 | /* Make room for a null element. */ |
| 6189 | s->_raw_size += sizeof (Elf32_External_Rel); |
| 6190 | ++s->reloc_count; |
| 6191 | } |
| 6192 | s->_raw_size += hmips->mips_32_relocs * sizeof (Elf32_External_Rel); |
| 6193 | } |
| 6194 | |
| 6195 | /* For a function, create a stub, if needed. */ |
| 6196 | if (h->type == STT_FUNC |
| 6197 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
| 6198 | { |
| 6199 | if (! elf_hash_table (info)->dynamic_sections_created) |
| 6200 | return true; |
| 6201 | |
| 6202 | /* If this symbol is not defined in a regular file, then set |
| 6203 | the symbol to the stub location. This is required to make |
| 6204 | function pointers compare as equal between the normal |
| 6205 | executable and the shared library. */ |
| 6206 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 6207 | { |
| 6208 | /* We need .stub section. */ |
| 6209 | s = bfd_get_section_by_name (dynobj, ".stub"); |
| 6210 | BFD_ASSERT (s != NULL); |
| 6211 | |
| 6212 | h->root.u.def.section = s; |
| 6213 | h->root.u.def.value = s->_raw_size; |
| 6214 | |
| 6215 | /* XXX Write this stub address somewhere. */ |
| 6216 | h->plt_offset = s->_raw_size; |
| 6217 | |
| 6218 | /* Make room for this stub code. */ |
| 6219 | s->_raw_size += MIPS_FUNCTION_STUB_SIZE; |
| 6220 | |
| 6221 | /* The last half word of the stub will be filled with the index |
| 6222 | of this symbol in .dynsym section. */ |
| 6223 | return true; |
| 6224 | } |
| 6225 | } |
| 6226 | |
| 6227 | /* If this is a weak symbol, and there is a real definition, the |
| 6228 | processor independent code will have arranged for us to see the |
| 6229 | real definition first, and we can just use the same value. */ |
| 6230 | if (h->weakdef != NULL) |
| 6231 | { |
| 6232 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined |
| 6233 | || h->weakdef->root.type == bfd_link_hash_defweak); |
| 6234 | h->root.u.def.section = h->weakdef->root.u.def.section; |
| 6235 | h->root.u.def.value = h->weakdef->root.u.def.value; |
| 6236 | return true; |
| 6237 | } |
| 6238 | |
| 6239 | /* This is a reference to a symbol defined by a dynamic object which |
| 6240 | is not a function. */ |
| 6241 | |
| 6242 | return true; |
| 6243 | } |
| 6244 | |
| 6245 | /* This function is called after all the input files have been read, |
| 6246 | and the input sections have been assigned to output sections. We |
| 6247 | check for any mips16 stub sections that we can discard. */ |
| 6248 | |
| 6249 | static boolean mips_elf_check_mips16_stubs |
| 6250 | PARAMS ((struct mips_elf_link_hash_entry *, PTR)); |
| 6251 | |
| 6252 | static boolean |
| 6253 | mips_elf_always_size_sections (output_bfd, info) |
| 6254 | bfd *output_bfd; |
| 6255 | struct bfd_link_info *info; |
| 6256 | { |
| 6257 | if (info->relocateable |
| 6258 | || ! mips_elf_hash_table (info)->mips16_stubs_seen) |
| 6259 | return true; |
| 6260 | |
| 6261 | mips_elf_link_hash_traverse (mips_elf_hash_table (info), |
| 6262 | mips_elf_check_mips16_stubs, |
| 6263 | (PTR) NULL); |
| 6264 | |
| 6265 | return true; |
| 6266 | } |
| 6267 | |
| 6268 | /* Check the mips16 stubs for a particular symbol, and see if we can |
| 6269 | discard them. */ |
| 6270 | |
| 6271 | /*ARGSUSED*/ |
| 6272 | static boolean |
| 6273 | mips_elf_check_mips16_stubs (h, data) |
| 6274 | struct mips_elf_link_hash_entry *h; |
| 6275 | PTR data; |
| 6276 | { |
| 6277 | if (h->fn_stub != NULL |
| 6278 | && ! h->need_fn_stub) |
| 6279 | { |
| 6280 | /* We don't need the fn_stub; the only references to this symbol |
| 6281 | are 16 bit calls. Clobber the size to 0 to prevent it from |
| 6282 | being included in the link. */ |
| 6283 | h->fn_stub->_raw_size = 0; |
| 6284 | h->fn_stub->_cooked_size = 0; |
| 6285 | h->fn_stub->flags &= ~ SEC_RELOC; |
| 6286 | h->fn_stub->reloc_count = 0; |
| 6287 | h->fn_stub->flags |= SEC_EXCLUDE; |
| 6288 | } |
| 6289 | |
| 6290 | if (h->call_stub != NULL |
| 6291 | && h->root.other == STO_MIPS16) |
| 6292 | { |
| 6293 | /* We don't need the call_stub; this is a 16 bit function, so |
| 6294 | calls from other 16 bit functions are OK. Clobber the size |
| 6295 | to 0 to prevent it from being included in the link. */ |
| 6296 | h->call_stub->_raw_size = 0; |
| 6297 | h->call_stub->_cooked_size = 0; |
| 6298 | h->call_stub->flags &= ~ SEC_RELOC; |
| 6299 | h->call_stub->reloc_count = 0; |
| 6300 | h->call_stub->flags |= SEC_EXCLUDE; |
| 6301 | } |
| 6302 | |
| 6303 | if (h->call_fp_stub != NULL |
| 6304 | && h->root.other == STO_MIPS16) |
| 6305 | { |
| 6306 | /* We don't need the call_stub; this is a 16 bit function, so |
| 6307 | calls from other 16 bit functions are OK. Clobber the size |
| 6308 | to 0 to prevent it from being included in the link. */ |
| 6309 | h->call_fp_stub->_raw_size = 0; |
| 6310 | h->call_fp_stub->_cooked_size = 0; |
| 6311 | h->call_fp_stub->flags &= ~ SEC_RELOC; |
| 6312 | h->call_fp_stub->reloc_count = 0; |
| 6313 | h->call_fp_stub->flags |= SEC_EXCLUDE; |
| 6314 | } |
| 6315 | |
| 6316 | return true; |
| 6317 | } |
| 6318 | |
| 6319 | /* Set the sizes of the dynamic sections. */ |
| 6320 | |
| 6321 | static boolean |
| 6322 | mips_elf_size_dynamic_sections (output_bfd, info) |
| 6323 | bfd *output_bfd; |
| 6324 | struct bfd_link_info *info; |
| 6325 | { |
| 6326 | bfd *dynobj; |
| 6327 | asection *s; |
| 6328 | boolean reltext; |
| 6329 | asection *sgot; |
| 6330 | struct mips_got_info *g; |
| 6331 | |
| 6332 | dynobj = elf_hash_table (info)->dynobj; |
| 6333 | BFD_ASSERT (dynobj != NULL); |
| 6334 | |
| 6335 | if (elf_hash_table (info)->dynamic_sections_created) |
| 6336 | { |
| 6337 | /* Set the contents of the .interp section to the interpreter. */ |
| 6338 | if (! info->shared) |
| 6339 | { |
| 6340 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 6341 | BFD_ASSERT (s != NULL); |
| 6342 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 6343 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 6344 | } |
| 6345 | } |
| 6346 | |
| 6347 | /* Recompute the size of .got for local entires (reserved and |
| 6348 | hipages) if needed. To estimate it, get the upper bound of total |
| 6349 | size of loadable sections. */ |
| 6350 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 6351 | |
| 6352 | if (sgot != NULL) |
| 6353 | { |
| 6354 | bfd_size_type loadable_size = 0; |
| 6355 | bfd_size_type local_gotno; |
| 6356 | struct _bfd *sub; |
| 6357 | |
| 6358 | BFD_ASSERT (elf_section_data (sgot) != NULL); |
| 6359 | g = (struct mips_got_info *) elf_section_data (sgot)->tdata; |
| 6360 | BFD_ASSERT (g != NULL); |
| 6361 | |
| 6362 | for (sub = info->input_bfds; sub; sub = sub->link_next) |
| 6363 | for (s = sub->sections; s != NULL; s = s->next) |
| 6364 | { |
| 6365 | if ((s->flags & SEC_ALLOC) == 0) |
| 6366 | continue; |
| 6367 | loadable_size += (s->_raw_size + 0xf) & ~0xf; |
| 6368 | } |
| 6369 | |
| 6370 | loadable_size += MIPS_FUNCTION_STUB_SIZE; |
| 6371 | |
| 6372 | /* Assume there are two loadable segments consisting of |
| 6373 | contiguous sections. Is 5 enough? */ |
| 6374 | local_gotno = (loadable_size >> 16) + 5 + MIPS_RESERVED_GOTNO; |
| 6375 | g->local_gotno = local_gotno; |
| 6376 | sgot->_raw_size += local_gotno * 4; |
| 6377 | } |
| 6378 | |
| 6379 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 6380 | determined the sizes of the various dynamic sections. Allocate |
| 6381 | memory for them. */ |
| 6382 | reltext = false; |
| 6383 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 6384 | { |
| 6385 | const char *name; |
| 6386 | boolean strip; |
| 6387 | |
| 6388 | /* It's OK to base decisions on the section name, because none |
| 6389 | of the dynobj section names depend upon the input files. */ |
| 6390 | name = bfd_get_section_name (dynobj, s); |
| 6391 | |
| 6392 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 6393 | continue; |
| 6394 | |
| 6395 | strip = false; |
| 6396 | |
| 6397 | if (strncmp (name, ".rel", 4) == 0) |
| 6398 | { |
| 6399 | if (s->_raw_size == 0) |
| 6400 | strip = true; |
| 6401 | else |
| 6402 | { |
| 6403 | const char *outname; |
| 6404 | asection *target; |
| 6405 | |
| 6406 | /* If this relocation section applies to a read only |
| 6407 | section, then we probably need a DT_TEXTREL entry. |
| 6408 | If the relocation section is .rel.dyn, we always |
| 6409 | assert a DT_TEXTREL entry rather than testing whether |
| 6410 | there exists a relocation to a read only section or |
| 6411 | not. */ |
| 6412 | outname = bfd_get_section_name (output_bfd, |
| 6413 | s->output_section); |
| 6414 | target = bfd_get_section_by_name (output_bfd, outname + 4); |
| 6415 | if ((target != NULL |
| 6416 | && (target->flags & SEC_READONLY) != 0 |
| 6417 | && (target->flags & SEC_ALLOC) != 0) |
| 6418 | || strcmp (outname, ".rel.dyn") == 0) |
| 6419 | reltext = true; |
| 6420 | |
| 6421 | /* We use the reloc_count field as a counter if we need |
| 6422 | to copy relocs into the output file. */ |
| 6423 | if (strcmp (name, ".rel.dyn") != 0) |
| 6424 | s->reloc_count = 0; |
| 6425 | } |
| 6426 | } |
| 6427 | else if (strncmp (name, ".got", 4) == 0) |
| 6428 | { |
| 6429 | int i; |
| 6430 | |
| 6431 | BFD_ASSERT (elf_section_data (s) != NULL); |
| 6432 | g = (struct mips_got_info *) elf_section_data (s)->tdata; |
| 6433 | BFD_ASSERT (g != NULL); |
| 6434 | |
| 6435 | /* Fix the size of .got section for the correspondence of |
| 6436 | global symbols and got entries. This adds some useless |
| 6437 | got entries. Is this required by ABI really? */ |
| 6438 | i = elf_hash_table (info)->dynsymcount - g->global_gotsym; |
| 6439 | s->_raw_size += i * 4; |
| 6440 | } |
| 6441 | else if (strncmp (name, ".stub", 5) == 0) |
| 6442 | { |
| 6443 | /* Irix rld assumes that the function stub isn't at the end |
| 6444 | of .text section. So put a dummy. XXX */ |
| 6445 | s->_raw_size += MIPS_FUNCTION_STUB_SIZE; |
| 6446 | } |
| 6447 | else if (! info->shared |
| 6448 | && ! mips_elf_hash_table (info)->use_rld_obj_head |
| 6449 | && strncmp (name, ".rld_map", 8) == 0) |
| 6450 | { |
| 6451 | /* We add a room for __rld_map. It will be filled in by the |
| 6452 | rtld to contain a pointer to the _r_debug structure. */ |
| 6453 | s->_raw_size += 4; |
| 6454 | } |
| 6455 | else if (SGI_COMPAT (output_bfd) |
| 6456 | && strncmp (name, ".compact_rel", 12) == 0) |
| 6457 | s->_raw_size += mips_elf_hash_table (info)->compact_rel_size; |
| 6458 | else if (strncmp (name, ".init", 5) != 0) |
| 6459 | { |
| 6460 | /* It's not one of our sections, so don't allocate space. */ |
| 6461 | continue; |
| 6462 | } |
| 6463 | |
| 6464 | if (strip) |
| 6465 | { |
| 6466 | asection **spp; |
| 6467 | |
| 6468 | for (spp = &s->output_section->owner->sections; |
| 6469 | *spp != s->output_section; |
| 6470 | spp = &(*spp)->next) |
| 6471 | ; |
| 6472 | *spp = s->output_section->next; |
| 6473 | --s->output_section->owner->section_count; |
| 6474 | |
| 6475 | continue; |
| 6476 | } |
| 6477 | |
| 6478 | /* Allocate memory for the section contents. */ |
| 6479 | s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size); |
| 6480 | if (s->contents == NULL && s->_raw_size != 0) |
| 6481 | { |
| 6482 | bfd_set_error (bfd_error_no_memory); |
| 6483 | return false; |
| 6484 | } |
| 6485 | memset (s->contents, 0, s->_raw_size); |
| 6486 | } |
| 6487 | |
| 6488 | if (elf_hash_table (info)->dynamic_sections_created) |
| 6489 | { |
| 6490 | /* Add some entries to the .dynamic section. We fill in the |
| 6491 | values later, in elf_mips_finish_dynamic_sections, but we |
| 6492 | must add the entries now so that we get the correct size for |
| 6493 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 6494 | dynamic linker and used by the debugger. */ |
| 6495 | if (! info->shared) |
| 6496 | { |
| 6497 | if (SGI_COMPAT (output_bfd)) |
| 6498 | { |
| 6499 | /* SGI object has the equivalence of DT_DEBUG in the |
| 6500 | DT_MIPS_RLD_MAP entry. */ |
| 6501 | if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_RLD_MAP, 0)) |
| 6502 | return false; |
| 6503 | } |
| 6504 | else |
| 6505 | if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0)) |
| 6506 | return false; |
| 6507 | } |
| 6508 | |
| 6509 | if (reltext) |
| 6510 | { |
| 6511 | if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0)) |
| 6512 | return false; |
| 6513 | } |
| 6514 | |
| 6515 | if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)) |
| 6516 | return false; |
| 6517 | |
| 6518 | if (bfd_get_section_by_name (dynobj, ".rel.dyn")) |
| 6519 | { |
| 6520 | if (! bfd_elf32_add_dynamic_entry (info, DT_REL, 0)) |
| 6521 | return false; |
| 6522 | |
| 6523 | if (! bfd_elf32_add_dynamic_entry (info, DT_RELSZ, 0)) |
| 6524 | return false; |
| 6525 | |
| 6526 | if (! bfd_elf32_add_dynamic_entry (info, DT_RELENT, 0)) |
| 6527 | return false; |
| 6528 | } |
| 6529 | |
| 6530 | if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_CONFLICTNO, 0)) |
| 6531 | return false; |
| 6532 | |
| 6533 | if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_LIBLISTNO, 0)) |
| 6534 | return false; |
| 6535 | |
| 6536 | if (bfd_get_section_by_name (dynobj, ".conflict") != NULL) |
| 6537 | { |
| 6538 | if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_CONFLICT, 0)) |
| 6539 | return false; |
| 6540 | |
| 6541 | s = bfd_get_section_by_name (dynobj, ".liblist"); |
| 6542 | BFD_ASSERT (s != NULL); |
| 6543 | |
| 6544 | if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_LIBLIST, 0)) |
| 6545 | return false; |
| 6546 | } |
| 6547 | |
| 6548 | if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_RLD_VERSION, 0)) |
| 6549 | return false; |
| 6550 | |
| 6551 | if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_FLAGS, 0)) |
| 6552 | return false; |
| 6553 | |
| 6554 | #if 0 |
| 6555 | /* Time stamps in executable files are a bad idea. */ |
| 6556 | if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_TIME_STAMP, 0)) |
| 6557 | return false; |
| 6558 | #endif |
| 6559 | |
| 6560 | #if 0 /* FIXME */ |
| 6561 | if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_ICHECKSUM, 0)) |
| 6562 | return false; |
| 6563 | #endif |
| 6564 | |
| 6565 | #if 0 /* FIXME */ |
| 6566 | if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_IVERSION, 0)) |
| 6567 | return false; |
| 6568 | #endif |
| 6569 | |
| 6570 | if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_BASE_ADDRESS, 0)) |
| 6571 | return false; |
| 6572 | |
| 6573 | if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_LOCAL_GOTNO, 0)) |
| 6574 | return false; |
| 6575 | |
| 6576 | if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_SYMTABNO, 0)) |
| 6577 | return false; |
| 6578 | |
| 6579 | if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_UNREFEXTNO, 0)) |
| 6580 | return false; |
| 6581 | |
| 6582 | if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_GOTSYM, 0)) |
| 6583 | return false; |
| 6584 | |
| 6585 | if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_HIPAGENO, 0)) |
| 6586 | return false; |
| 6587 | |
| 6588 | #if 0 /* (SGI_COMPAT) */ |
| 6589 | if (! bfd_get_section_by_name (dynobj, ".init")) |
| 6590 | if (! bfd_elf32_add_dynamic_entry (info, DT_INIT, 0)) |
| 6591 | return false; |
| 6592 | |
| 6593 | if (! bfd_get_section_by_name (dynobj, ".fini")) |
| 6594 | if (! bfd_elf32_add_dynamic_entry (info, DT_FINI, 0)) |
| 6595 | return false; |
| 6596 | #endif |
| 6597 | } |
| 6598 | |
| 6599 | /* If we use dynamic linking, we generate a section symbol for each |
| 6600 | output section. These are local symbols, which means that they |
| 6601 | must come first in the dynamic symbol table. |
| 6602 | That means we must increment the dynamic symbol index of every |
| 6603 | other dynamic symbol. */ |
| 6604 | { |
| 6605 | const char * const *namep; |
| 6606 | unsigned int c, i; |
| 6607 | bfd_size_type strindex; |
| 6608 | struct bfd_strtab_hash *dynstr; |
| 6609 | struct mips_got_info *g; |
| 6610 | |
| 6611 | c = 0; |
| 6612 | if (elf_hash_table (info)->dynamic_sections_created) |
| 6613 | { |
| 6614 | if (SGI_COMPAT (output_bfd)) |
| 6615 | { |
| 6616 | c = SIZEOF_MIPS_DYNSYM_SECNAMES - 1; |
| 6617 | elf_link_hash_traverse (elf_hash_table (info), |
| 6618 | mips_elf_adjust_dynindx, |
| 6619 | (PTR) &c); |
| 6620 | elf_hash_table (info)->dynsymcount += c; |
| 6621 | |
| 6622 | dynstr = elf_hash_table (info)->dynstr; |
| 6623 | BFD_ASSERT (dynstr != NULL); |
| 6624 | |
| 6625 | for (i = 1, namep = mips_elf_dynsym_sec_names; |
| 6626 | *namep != NULL; |
| 6627 | i++, namep++) |
| 6628 | { |
| 6629 | s = bfd_get_section_by_name (output_bfd, *namep); |
| 6630 | if (s != NULL) |
| 6631 | elf_section_data (s)->dynindx = i; |
| 6632 | |
| 6633 | strindex = _bfd_stringtab_add (dynstr, *namep, true, false); |
| 6634 | if (strindex == (bfd_size_type) -1) |
| 6635 | return false; |
| 6636 | |
| 6637 | mips_elf_hash_table (info)->dynsym_sec_strindex[i] = strindex; |
| 6638 | } |
| 6639 | } |
| 6640 | else |
| 6641 | { |
| 6642 | c = bfd_count_sections (output_bfd); |
| 6643 | elf_link_hash_traverse (elf_hash_table (info), |
| 6644 | mips_elf_adjust_dynindx, |
| 6645 | (PTR) &c); |
| 6646 | elf_hash_table (info)->dynsymcount += c; |
| 6647 | |
| 6648 | for (i = 1, s = output_bfd->sections; s != NULL; s = s->next, i++) |
| 6649 | { |
| 6650 | elf_section_data (s)->dynindx = i; |
| 6651 | /* These symbols will have no names, so we don't need to |
| 6652 | fiddle with dynstr_index. */ |
| 6653 | } |
| 6654 | } |
| 6655 | } |
| 6656 | |
| 6657 | if (sgot != NULL) |
| 6658 | { |
| 6659 | BFD_ASSERT (elf_section_data (sgot) != NULL); |
| 6660 | g = (struct mips_got_info *) elf_section_data (sgot)->tdata; |
| 6661 | BFD_ASSERT (g != NULL); |
| 6662 | |
| 6663 | /* If there are no global got symbols, fake the last symbol so |
| 6664 | for safety. */ |
| 6665 | if (g->global_gotsym) |
| 6666 | g->global_gotsym += c; |
| 6667 | else |
| 6668 | g->global_gotsym = elf_hash_table (info)->dynsymcount - 1; |
| 6669 | } |
| 6670 | } |
| 6671 | |
| 6672 | return true; |
| 6673 | } |
| 6674 | |
| 6675 | /* Increment the index of a dynamic symbol by a given amount. Called |
| 6676 | via elf_link_hash_traverse. */ |
| 6677 | |
| 6678 | static boolean |
| 6679 | mips_elf_adjust_dynindx (h, cparg) |
| 6680 | struct elf_link_hash_entry *h; |
| 6681 | PTR cparg; |
| 6682 | { |
| 6683 | unsigned int *cp = (unsigned int *) cparg; |
| 6684 | |
| 6685 | if (h->dynindx != -1) |
| 6686 | h->dynindx += *cp; |
| 6687 | return true; |
| 6688 | } |
| 6689 | |
| 6690 | /* Finish up dynamic symbol handling. We set the contents of various |
| 6691 | dynamic sections here. */ |
| 6692 | |
| 6693 | static boolean |
| 6694 | mips_elf_finish_dynamic_symbol (output_bfd, info, h, sym) |
| 6695 | bfd *output_bfd; |
| 6696 | struct bfd_link_info *info; |
| 6697 | struct elf_link_hash_entry *h; |
| 6698 | Elf_Internal_Sym *sym; |
| 6699 | { |
| 6700 | bfd *dynobj; |
| 6701 | bfd_vma gval; |
| 6702 | asection *sgot; |
| 6703 | struct mips_got_info *g; |
| 6704 | const char *name; |
| 6705 | |
| 6706 | dynobj = elf_hash_table (info)->dynobj; |
| 6707 | gval = sym->st_value; |
| 6708 | |
| 6709 | if (h->plt_offset != (bfd_vma) -1) |
| 6710 | { |
| 6711 | asection *s; |
| 6712 | bfd_byte *p; |
| 6713 | bfd_byte stub[MIPS_FUNCTION_STUB_SIZE]; |
| 6714 | |
| 6715 | /* This symbol has a stub. Set it up. */ |
| 6716 | |
| 6717 | BFD_ASSERT (h->dynindx != -1); |
| 6718 | |
| 6719 | s = bfd_get_section_by_name (dynobj, ".stub"); |
| 6720 | BFD_ASSERT (s != NULL); |
| 6721 | |
| 6722 | /* Fill the stub. */ |
| 6723 | p = stub; |
| 6724 | bfd_put_32 (output_bfd, STUB_LW(output_bfd), p); |
| 6725 | p += 4; |
| 6726 | bfd_put_32 (output_bfd, STUB_MOVE, p); |
| 6727 | p += 4; |
| 6728 | |
| 6729 | /* FIXME: Can h->dynindex be more than 64K? */ |
| 6730 | if (h->dynindx & 0xffff0000) |
| 6731 | return false; |
| 6732 | |
| 6733 | bfd_put_32 (output_bfd, STUB_JALR, p); |
| 6734 | p += 4; |
| 6735 | bfd_put_32 (output_bfd, STUB_LI16 + h->dynindx, p); |
| 6736 | |
| 6737 | BFD_ASSERT (h->plt_offset <= s->_raw_size); |
| 6738 | memcpy (s->contents + h->plt_offset, stub, MIPS_FUNCTION_STUB_SIZE); |
| 6739 | |
| 6740 | /* Mark the symbol as undefined. plt_offset != -1 occurs |
| 6741 | only for the referenced symbol. */ |
| 6742 | sym->st_shndx = SHN_UNDEF; |
| 6743 | |
| 6744 | /* The run-time linker uses the st_value field of the symbol |
| 6745 | to reset the global offset table entry for this external |
| 6746 | to its stub address when unlinking a shared object. */ |
| 6747 | gval = s->output_section->vma + s->output_offset + h->plt_offset; |
| 6748 | sym->st_value = gval; |
| 6749 | } |
| 6750 | |
| 6751 | BFD_ASSERT (h->dynindx != -1); |
| 6752 | |
| 6753 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 6754 | BFD_ASSERT (sgot != NULL); |
| 6755 | BFD_ASSERT (elf_section_data (sgot) != NULL); |
| 6756 | g = (struct mips_got_info *) elf_section_data (sgot)->tdata; |
| 6757 | BFD_ASSERT (g != NULL); |
| 6758 | |
| 6759 | if ((unsigned long) h->dynindx >= g->global_gotsym) |
| 6760 | { |
| 6761 | bfd_size_type offset; |
| 6762 | |
| 6763 | /* This symbol has an entry in the global offset table. Set its |
| 6764 | value to the corresponding got entry, if needed. */ |
| 6765 | if (h->got_offset == (bfd_vma) -1) |
| 6766 | { |
| 6767 | offset = (h->dynindx - g->global_gotsym + g->local_gotno) * 4; |
| 6768 | BFD_ASSERT (g->local_gotno * 4 <= offset |
| 6769 | && offset < sgot->_raw_size); |
| 6770 | bfd_put_32 (output_bfd, gval, sgot->contents + offset); |
| 6771 | } |
| 6772 | } |
| 6773 | |
| 6774 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
| 6775 | name = h->root.root.string; |
| 6776 | if (strcmp (name, "_DYNAMIC") == 0 |
| 6777 | || strcmp (name, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 6778 | sym->st_shndx = SHN_ABS; |
| 6779 | else if (strcmp (name, "_DYNAMIC_LINK") == 0) |
| 6780 | { |
| 6781 | sym->st_shndx = SHN_ABS; |
| 6782 | sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); |
| 6783 | sym->st_value = 1; |
| 6784 | } |
| 6785 | else if (SGI_COMPAT (output_bfd)) |
| 6786 | { |
| 6787 | if (strcmp (name, "_gp_disp") == 0) |
| 6788 | { |
| 6789 | sym->st_shndx = SHN_ABS; |
| 6790 | sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); |
| 6791 | sym->st_value = elf_gp (output_bfd); |
| 6792 | } |
| 6793 | else if (strcmp (name, mips_elf_dynsym_rtproc_names[0]) == 0 |
| 6794 | || strcmp (name, mips_elf_dynsym_rtproc_names[1]) == 0) |
| 6795 | { |
| 6796 | sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); |
| 6797 | sym->st_other = STO_PROTECTED; |
| 6798 | sym->st_value = 0; |
| 6799 | sym->st_shndx = SHN_MIPS_DATA; |
| 6800 | } |
| 6801 | else if (strcmp (name, mips_elf_dynsym_rtproc_names[2]) == 0) |
| 6802 | { |
| 6803 | sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); |
| 6804 | sym->st_other = STO_PROTECTED; |
| 6805 | sym->st_value = mips_elf_hash_table (info)->procedure_count; |
| 6806 | sym->st_shndx = SHN_ABS; |
| 6807 | } |
| 6808 | else if (sym->st_shndx != SHN_UNDEF && sym->st_shndx != SHN_ABS) |
| 6809 | { |
| 6810 | if (h->type == STT_FUNC) |
| 6811 | sym->st_shndx = SHN_MIPS_TEXT; |
| 6812 | else if (h->type == STT_OBJECT) |
| 6813 | sym->st_shndx = SHN_MIPS_DATA; |
| 6814 | } |
| 6815 | } |
| 6816 | |
| 6817 | if (SGI_COMPAT (output_bfd) |
| 6818 | && ! info->shared) |
| 6819 | { |
| 6820 | if (! mips_elf_hash_table (info)->use_rld_obj_head |
| 6821 | && strcmp (name, "__rld_map") == 0) |
| 6822 | { |
| 6823 | asection *s = bfd_get_section_by_name (dynobj, ".rld_map"); |
| 6824 | BFD_ASSERT (s != NULL); |
| 6825 | sym->st_value = s->output_section->vma + s->output_offset; |
| 6826 | bfd_put_32 (output_bfd, (bfd_vma) 0, s->contents); |
| 6827 | if (mips_elf_hash_table (info)->rld_value == 0) |
| 6828 | mips_elf_hash_table (info)->rld_value = sym->st_value; |
| 6829 | } |
| 6830 | else if (mips_elf_hash_table (info)->use_rld_obj_head |
| 6831 | && strcmp (name, "__rld_obj_head") == 0) |
| 6832 | { |
| 6833 | asection *s = bfd_get_section_by_name (dynobj, ".rld_map"); |
| 6834 | BFD_ASSERT (s != NULL); |
| 6835 | mips_elf_hash_table (info)->rld_value = sym->st_value; |
| 6836 | } |
| 6837 | } |
| 6838 | |
| 6839 | /* If this is a mips16 symbol, force the value to be even. */ |
| 6840 | if (sym->st_other == STO_MIPS16 |
| 6841 | && (sym->st_value & 1) != 0) |
| 6842 | --sym->st_value; |
| 6843 | |
| 6844 | return true; |
| 6845 | } |
| 6846 | |
| 6847 | /* Finish up the dynamic sections. */ |
| 6848 | |
| 6849 | static boolean |
| 6850 | mips_elf_finish_dynamic_sections (output_bfd, info) |
| 6851 | bfd *output_bfd; |
| 6852 | struct bfd_link_info *info; |
| 6853 | { |
| 6854 | bfd *dynobj; |
| 6855 | asection *sdyn; |
| 6856 | asection *sgot; |
| 6857 | struct mips_got_info *g; |
| 6858 | |
| 6859 | dynobj = elf_hash_table (info)->dynobj; |
| 6860 | |
| 6861 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 6862 | |
| 6863 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 6864 | if (sgot == NULL) |
| 6865 | g = NULL; |
| 6866 | else |
| 6867 | { |
| 6868 | BFD_ASSERT (elf_section_data (sgot) != NULL); |
| 6869 | g = (struct mips_got_info *) elf_section_data (sgot)->tdata; |
| 6870 | BFD_ASSERT (g != NULL); |
| 6871 | } |
| 6872 | |
| 6873 | if (elf_hash_table (info)->dynamic_sections_created) |
| 6874 | { |
| 6875 | Elf32_External_Dyn *dyncon, *dynconend; |
| 6876 | |
| 6877 | BFD_ASSERT (sdyn != NULL); |
| 6878 | BFD_ASSERT (g != NULL); |
| 6879 | |
| 6880 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 6881 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); |
| 6882 | for (; dyncon < dynconend; dyncon++) |
| 6883 | { |
| 6884 | Elf_Internal_Dyn dyn; |
| 6885 | const char *name; |
| 6886 | size_t elemsize; |
| 6887 | asection *s; |
| 6888 | |
| 6889 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 6890 | |
| 6891 | switch (dyn.d_tag) |
| 6892 | { |
| 6893 | default: |
| 6894 | break; |
| 6895 | |
| 6896 | case DT_RELENT: |
| 6897 | s = bfd_get_section_by_name (dynobj, ".rel.dyn"); |
| 6898 | BFD_ASSERT (s != NULL); |
| 6899 | dyn.d_un.d_val = sizeof (Elf32_External_Rel); |
| 6900 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 6901 | break; |
| 6902 | |
| 6903 | case DT_STRSZ: |
| 6904 | /* Rewrite DT_STRSZ. */ |
| 6905 | dyn.d_un.d_val = |
| 6906 | _bfd_stringtab_size (elf_hash_table (info)->dynstr); |
| 6907 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 6908 | break; |
| 6909 | |
| 6910 | case DT_PLTGOT: |
| 6911 | name = ".got"; |
| 6912 | goto get_vma; |
| 6913 | case DT_MIPS_CONFLICT: |
| 6914 | name = ".conflict"; |
| 6915 | goto get_vma; |
| 6916 | case DT_MIPS_LIBLIST: |
| 6917 | name = ".liblist"; |
| 6918 | get_vma: |
| 6919 | s = bfd_get_section_by_name (output_bfd, name); |
| 6920 | BFD_ASSERT (s != NULL); |
| 6921 | dyn.d_un.d_ptr = s->vma; |
| 6922 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 6923 | break; |
| 6924 | |
| 6925 | case DT_MIPS_RLD_VERSION: |
| 6926 | dyn.d_un.d_val = 1; /* XXX */ |
| 6927 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 6928 | break; |
| 6929 | |
| 6930 | case DT_MIPS_FLAGS: |
| 6931 | dyn.d_un.d_val = RHF_NOTPOT; /* XXX */ |
| 6932 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 6933 | break; |
| 6934 | |
| 6935 | case DT_MIPS_CONFLICTNO: |
| 6936 | name = ".conflict"; |
| 6937 | elemsize = sizeof (Elf32_Conflict); |
| 6938 | goto set_elemno; |
| 6939 | |
| 6940 | case DT_MIPS_LIBLISTNO: |
| 6941 | name = ".liblist"; |
| 6942 | elemsize = sizeof (Elf32_Lib); |
| 6943 | set_elemno: |
| 6944 | s = bfd_get_section_by_name (output_bfd, name); |
| 6945 | if (s != NULL) |
| 6946 | { |
| 6947 | if (s->_cooked_size != 0) |
| 6948 | dyn.d_un.d_val = s->_cooked_size / elemsize; |
| 6949 | else |
| 6950 | dyn.d_un.d_val = s->_raw_size / elemsize; |
| 6951 | } |
| 6952 | else |
| 6953 | dyn.d_un.d_val = 0; |
| 6954 | |
| 6955 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 6956 | break; |
| 6957 | |
| 6958 | case DT_MIPS_TIME_STAMP: |
| 6959 | time ((time_t *) &dyn.d_un.d_val); |
| 6960 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 6961 | break; |
| 6962 | |
| 6963 | case DT_MIPS_ICHECKSUM: |
| 6964 | /* XXX FIXME: */ |
| 6965 | break; |
| 6966 | |
| 6967 | case DT_MIPS_IVERSION: |
| 6968 | /* XXX FIXME: */ |
| 6969 | break; |
| 6970 | |
| 6971 | case DT_MIPS_BASE_ADDRESS: |
| 6972 | s = output_bfd->sections; |
| 6973 | BFD_ASSERT (s != NULL); |
| 6974 | dyn.d_un.d_ptr = s->vma & ~(0xffff); |
| 6975 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 6976 | break; |
| 6977 | |
| 6978 | case DT_MIPS_LOCAL_GOTNO: |
| 6979 | dyn.d_un.d_val = g->local_gotno; |
| 6980 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 6981 | break; |
| 6982 | |
| 6983 | case DT_MIPS_SYMTABNO: |
| 6984 | name = ".dynsym"; |
| 6985 | elemsize = sizeof (Elf32_External_Sym); |
| 6986 | s = bfd_get_section_by_name (output_bfd, name); |
| 6987 | BFD_ASSERT (s != NULL); |
| 6988 | |
| 6989 | if (s->_cooked_size != 0) |
| 6990 | dyn.d_un.d_val = s->_cooked_size / elemsize; |
| 6991 | else |
| 6992 | dyn.d_un.d_val = s->_raw_size / elemsize; |
| 6993 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 6994 | break; |
| 6995 | |
| 6996 | case DT_MIPS_UNREFEXTNO: |
| 6997 | /* XXX FIXME: */ |
| 6998 | dyn.d_un.d_val = SIZEOF_MIPS_DYNSYM_SECNAMES; |
| 6999 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 7000 | break; |
| 7001 | |
| 7002 | case DT_MIPS_GOTSYM: |
| 7003 | dyn.d_un.d_val = g->global_gotsym; |
| 7004 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 7005 | break; |
| 7006 | |
| 7007 | case DT_MIPS_HIPAGENO: |
| 7008 | dyn.d_un.d_val = g->local_gotno - MIPS_RESERVED_GOTNO; |
| 7009 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 7010 | break; |
| 7011 | |
| 7012 | case DT_MIPS_RLD_MAP: |
| 7013 | dyn.d_un.d_ptr = mips_elf_hash_table (info)->rld_value; |
| 7014 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 7015 | break; |
| 7016 | |
| 7017 | } |
| 7018 | } |
| 7019 | } |
| 7020 | |
| 7021 | /* The first entry of the global offset table will be filled at |
| 7022 | runtime. The second entry will be used by some runtime loaders. |
| 7023 | This isn't the case of Irix rld. */ |
| 7024 | if (sgot != NULL && sgot->_raw_size > 0) |
| 7025 | { |
| 7026 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); |
| 7027 | bfd_put_32 (output_bfd, (bfd_vma) 0x80000000, sgot->contents + 4); |
| 7028 | } |
| 7029 | |
| 7030 | if (sgot != NULL) |
| 7031 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
| 7032 | |
| 7033 | { |
| 7034 | asection *sdynsym; |
| 7035 | asection *s; |
| 7036 | unsigned int i; |
| 7037 | bfd_vma last; |
| 7038 | Elf_Internal_Sym sym; |
| 7039 | long dindx; |
| 7040 | const char *name; |
| 7041 | const char * const * namep = mips_elf_dynsym_sec_names; |
| 7042 | Elf32_compact_rel cpt; |
| 7043 | |
| 7044 | /* Set up the section symbols for the output sections. SGI sets |
| 7045 | the STT_NOTYPE attribute for these symbols. Should we do so? */ |
| 7046 | |
| 7047 | sdynsym = bfd_get_section_by_name (dynobj, ".dynsym"); |
| 7048 | if (sdynsym != NULL) |
| 7049 | { |
| 7050 | if (SGI_COMPAT (output_bfd)) |
| 7051 | { |
| 7052 | sym.st_size = 0; |
| 7053 | sym.st_name = 0; |
| 7054 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE); |
| 7055 | sym.st_other = 0; |
| 7056 | |
| 7057 | i = 0; |
| 7058 | while ((name = *namep++) != NULL) |
| 7059 | { |
| 7060 | s = bfd_get_section_by_name (output_bfd, name); |
| 7061 | if (s != NULL) |
| 7062 | { |
| 7063 | sym.st_value = s->vma; |
| 7064 | dindx = elf_section_data (s)->dynindx; |
| 7065 | last = s->vma + s->_raw_size; |
| 7066 | } |
| 7067 | else |
| 7068 | { |
| 7069 | sym.st_value = last; |
| 7070 | dindx++; |
| 7071 | } |
| 7072 | |
| 7073 | sym.st_shndx = (i < MIPS_TEXT_DYNSYM_SECNO |
| 7074 | ? SHN_MIPS_TEXT |
| 7075 | : SHN_MIPS_DATA); |
| 7076 | ++i; |
| 7077 | sym.st_name = |
| 7078 | mips_elf_hash_table (info)->dynsym_sec_strindex[dindx]; |
| 7079 | |
| 7080 | bfd_elf32_swap_symbol_out (output_bfd, &sym, |
| 7081 | (((Elf32_External_Sym *) |
| 7082 | sdynsym->contents) |
| 7083 | + dindx)); |
| 7084 | } |
| 7085 | |
| 7086 | /* Set the sh_info field of the output .dynsym section to |
| 7087 | the index of the first global symbol. */ |
| 7088 | elf_section_data (sdynsym->output_section)->this_hdr.sh_info = |
| 7089 | SIZEOF_MIPS_DYNSYM_SECNAMES; |
| 7090 | } |
| 7091 | else |
| 7092 | { |
| 7093 | sym.st_size = 0; |
| 7094 | sym.st_name = 0; |
| 7095 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); |
| 7096 | sym.st_other = 0; |
| 7097 | |
| 7098 | for (s = output_bfd->sections; s != NULL; s = s->next) |
| 7099 | { |
| 7100 | int indx; |
| 7101 | |
| 7102 | sym.st_value = s->vma; |
| 7103 | |
| 7104 | indx = elf_section_data (s)->this_idx; |
| 7105 | BFD_ASSERT (indx > 0); |
| 7106 | sym.st_shndx = indx; |
| 7107 | |
| 7108 | bfd_elf32_swap_symbol_out (output_bfd, &sym, |
| 7109 | (((Elf32_External_Sym *) |
| 7110 | sdynsym->contents) |
| 7111 | + elf_section_data (s)->dynindx)); |
| 7112 | } |
| 7113 | |
| 7114 | /* Set the sh_info field of the output .dynsym section to |
| 7115 | the index of the first global symbol. */ |
| 7116 | elf_section_data (sdynsym->output_section)->this_hdr.sh_info = |
| 7117 | bfd_count_sections (output_bfd) + 1; |
| 7118 | } |
| 7119 | } |
| 7120 | |
| 7121 | if (SGI_COMPAT (output_bfd)) |
| 7122 | { |
| 7123 | /* Write .compact_rel section out. */ |
| 7124 | s = bfd_get_section_by_name (dynobj, ".compact_rel"); |
| 7125 | if (s != NULL) |
| 7126 | { |
| 7127 | cpt.id1 = 1; |
| 7128 | cpt.num = s->reloc_count; |
| 7129 | cpt.id2 = 2; |
| 7130 | cpt.offset = (s->output_section->filepos |
| 7131 | + sizeof (Elf32_External_compact_rel)); |
| 7132 | cpt.reserved0 = 0; |
| 7133 | cpt.reserved1 = 0; |
| 7134 | bfd_elf32_swap_compact_rel_out (output_bfd, &cpt, |
| 7135 | ((Elf32_External_compact_rel *) |
| 7136 | s->contents)); |
| 7137 | |
| 7138 | /* Clean up a dummy stub function entry in .text. */ |
| 7139 | s = bfd_get_section_by_name (dynobj, ".stub"); |
| 7140 | if (s != NULL) |
| 7141 | { |
| 7142 | file_ptr dummy_offset; |
| 7143 | |
| 7144 | BFD_ASSERT (s->_raw_size >= MIPS_FUNCTION_STUB_SIZE); |
| 7145 | dummy_offset = s->_raw_size - MIPS_FUNCTION_STUB_SIZE; |
| 7146 | memset (s->contents + dummy_offset, 0, |
| 7147 | MIPS_FUNCTION_STUB_SIZE); |
| 7148 | } |
| 7149 | } |
| 7150 | } |
| 7151 | |
| 7152 | /* Clean up a first relocation in .rel.dyn. */ |
| 7153 | s = bfd_get_section_by_name (dynobj, ".rel.dyn"); |
| 7154 | if (s != NULL && s->_raw_size > 0) |
| 7155 | memset (s->contents, 0, sizeof (Elf32_External_Rel)); |
| 7156 | } |
| 7157 | |
| 7158 | return true; |
| 7159 | } |
| 7160 | \f |
| 7161 | /* This is almost identical to bfd_generic_get_... except that some |
| 7162 | MIPS relocations need to be handled specially. Sigh. */ |
| 7163 | |
| 7164 | static bfd_byte * |
| 7165 | elf32_mips_get_relocated_section_contents (abfd, link_info, link_order, data, |
| 7166 | relocateable, symbols) |
| 7167 | bfd *abfd; |
| 7168 | struct bfd_link_info *link_info; |
| 7169 | struct bfd_link_order *link_order; |
| 7170 | bfd_byte *data; |
| 7171 | boolean relocateable; |
| 7172 | asymbol **symbols; |
| 7173 | { |
| 7174 | /* Get enough memory to hold the stuff */ |
| 7175 | bfd *input_bfd = link_order->u.indirect.section->owner; |
| 7176 | asection *input_section = link_order->u.indirect.section; |
| 7177 | |
| 7178 | long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section); |
| 7179 | arelent **reloc_vector = NULL; |
| 7180 | long reloc_count; |
| 7181 | |
| 7182 | if (reloc_size < 0) |
| 7183 | goto error_return; |
| 7184 | |
| 7185 | reloc_vector = (arelent **) bfd_malloc (reloc_size); |
| 7186 | if (reloc_vector == NULL && reloc_size != 0) |
| 7187 | goto error_return; |
| 7188 | |
| 7189 | /* read in the section */ |
| 7190 | if (!bfd_get_section_contents (input_bfd, |
| 7191 | input_section, |
| 7192 | (PTR) data, |
| 7193 | 0, |
| 7194 | input_section->_raw_size)) |
| 7195 | goto error_return; |
| 7196 | |
| 7197 | /* We're not relaxing the section, so just copy the size info */ |
| 7198 | input_section->_cooked_size = input_section->_raw_size; |
| 7199 | input_section->reloc_done = true; |
| 7200 | |
| 7201 | reloc_count = bfd_canonicalize_reloc (input_bfd, |
| 7202 | input_section, |
| 7203 | reloc_vector, |
| 7204 | symbols); |
| 7205 | if (reloc_count < 0) |
| 7206 | goto error_return; |
| 7207 | |
| 7208 | if (reloc_count > 0) |
| 7209 | { |
| 7210 | arelent **parent; |
| 7211 | /* for mips */ |
| 7212 | int gp_found; |
| 7213 | bfd_vma gp = 0x12345678; /* initialize just to shut gcc up */ |
| 7214 | |
| 7215 | { |
| 7216 | struct bfd_hash_entry *h; |
| 7217 | struct bfd_link_hash_entry *lh; |
| 7218 | /* Skip all this stuff if we aren't mixing formats. */ |
| 7219 | if (abfd && input_bfd |
| 7220 | && abfd->xvec == input_bfd->xvec) |
| 7221 | lh = 0; |
| 7222 | else |
| 7223 | { |
| 7224 | h = bfd_hash_lookup (&link_info->hash->table, "_gp", false, false); |
| 7225 | lh = (struct bfd_link_hash_entry *) h; |
| 7226 | } |
| 7227 | lookup: |
| 7228 | if (lh) |
| 7229 | { |
| 7230 | switch (lh->type) |
| 7231 | { |
| 7232 | case bfd_link_hash_undefined: |
| 7233 | case bfd_link_hash_undefweak: |
| 7234 | case bfd_link_hash_common: |
| 7235 | gp_found = 0; |
| 7236 | break; |
| 7237 | case bfd_link_hash_defined: |
| 7238 | case bfd_link_hash_defweak: |
| 7239 | gp_found = 1; |
| 7240 | gp = lh->u.def.value; |
| 7241 | break; |
| 7242 | case bfd_link_hash_indirect: |
| 7243 | case bfd_link_hash_warning: |
| 7244 | lh = lh->u.i.link; |
| 7245 | /* @@FIXME ignoring warning for now */ |
| 7246 | goto lookup; |
| 7247 | case bfd_link_hash_new: |
| 7248 | default: |
| 7249 | abort (); |
| 7250 | } |
| 7251 | } |
| 7252 | else |
| 7253 | gp_found = 0; |
| 7254 | } |
| 7255 | /* end mips */ |
| 7256 | for (parent = reloc_vector; *parent != (arelent *) NULL; |
| 7257 | parent++) |
| 7258 | { |
| 7259 | char *error_message = (char *) NULL; |
| 7260 | bfd_reloc_status_type r; |
| 7261 | |
| 7262 | /* Specific to MIPS: Deal with relocation types that require |
| 7263 | knowing the gp of the output bfd. */ |
| 7264 | asymbol *sym = *(*parent)->sym_ptr_ptr; |
| 7265 | if (bfd_is_abs_section (sym->section) && abfd) |
| 7266 | { |
| 7267 | /* The special_function wouldn't get called anyways. */ |
| 7268 | } |
| 7269 | else if (!gp_found) |
| 7270 | { |
| 7271 | /* The gp isn't there; let the special function code |
| 7272 | fall over on its own. */ |
| 7273 | } |
| 7274 | else if ((*parent)->howto->special_function |
| 7275 | == _bfd_mips_elf_gprel16_reloc) |
| 7276 | { |
| 7277 | /* bypass special_function call */ |
| 7278 | r = gprel16_with_gp (input_bfd, sym, *parent, input_section, |
| 7279 | relocateable, (PTR) data, gp); |
| 7280 | goto skip_bfd_perform_relocation; |
| 7281 | } |
| 7282 | /* end mips specific stuff */ |
| 7283 | |
| 7284 | r = bfd_perform_relocation (input_bfd, |
| 7285 | *parent, |
| 7286 | (PTR) data, |
| 7287 | input_section, |
| 7288 | relocateable ? abfd : (bfd *) NULL, |
| 7289 | &error_message); |
| 7290 | skip_bfd_perform_relocation: |
| 7291 | |
| 7292 | if (relocateable) |
| 7293 | { |
| 7294 | asection *os = input_section->output_section; |
| 7295 | |
| 7296 | /* A partial link, so keep the relocs */ |
| 7297 | os->orelocation[os->reloc_count] = *parent; |
| 7298 | os->reloc_count++; |
| 7299 | } |
| 7300 | |
| 7301 | if (r != bfd_reloc_ok) |
| 7302 | { |
| 7303 | switch (r) |
| 7304 | { |
| 7305 | case bfd_reloc_undefined: |
| 7306 | if (!((*link_info->callbacks->undefined_symbol) |
| 7307 | (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr), |
| 7308 | input_bfd, input_section, (*parent)->address))) |
| 7309 | goto error_return; |
| 7310 | break; |
| 7311 | case bfd_reloc_dangerous: |
| 7312 | BFD_ASSERT (error_message != (char *) NULL); |
| 7313 | if (!((*link_info->callbacks->reloc_dangerous) |
| 7314 | (link_info, error_message, input_bfd, input_section, |
| 7315 | (*parent)->address))) |
| 7316 | goto error_return; |
| 7317 | break; |
| 7318 | case bfd_reloc_overflow: |
| 7319 | if (!((*link_info->callbacks->reloc_overflow) |
| 7320 | (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr), |
| 7321 | (*parent)->howto->name, (*parent)->addend, |
| 7322 | input_bfd, input_section, (*parent)->address))) |
| 7323 | goto error_return; |
| 7324 | break; |
| 7325 | case bfd_reloc_outofrange: |
| 7326 | default: |
| 7327 | abort (); |
| 7328 | break; |
| 7329 | } |
| 7330 | |
| 7331 | } |
| 7332 | } |
| 7333 | } |
| 7334 | if (reloc_vector != NULL) |
| 7335 | free (reloc_vector); |
| 7336 | return data; |
| 7337 | |
| 7338 | error_return: |
| 7339 | if (reloc_vector != NULL) |
| 7340 | free (reloc_vector); |
| 7341 | return NULL; |
| 7342 | } |
| 7343 | #define bfd_elf32_bfd_get_relocated_section_contents \ |
| 7344 | elf32_mips_get_relocated_section_contents |
| 7345 | \f |
| 7346 | /* ECOFF swapping routines. These are used when dealing with the |
| 7347 | .mdebug section, which is in the ECOFF debugging format. */ |
| 7348 | static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap = |
| 7349 | { |
| 7350 | /* Symbol table magic number. */ |
| 7351 | magicSym, |
| 7352 | /* Alignment of debugging information. E.g., 4. */ |
| 7353 | 4, |
| 7354 | /* Sizes of external symbolic information. */ |
| 7355 | sizeof (struct hdr_ext), |
| 7356 | sizeof (struct dnr_ext), |
| 7357 | sizeof (struct pdr_ext), |
| 7358 | sizeof (struct sym_ext), |
| 7359 | sizeof (struct opt_ext), |
| 7360 | sizeof (struct fdr_ext), |
| 7361 | sizeof (struct rfd_ext), |
| 7362 | sizeof (struct ext_ext), |
| 7363 | /* Functions to swap in external symbolic data. */ |
| 7364 | ecoff_swap_hdr_in, |
| 7365 | ecoff_swap_dnr_in, |
| 7366 | ecoff_swap_pdr_in, |
| 7367 | ecoff_swap_sym_in, |
| 7368 | ecoff_swap_opt_in, |
| 7369 | ecoff_swap_fdr_in, |
| 7370 | ecoff_swap_rfd_in, |
| 7371 | ecoff_swap_ext_in, |
| 7372 | _bfd_ecoff_swap_tir_in, |
| 7373 | _bfd_ecoff_swap_rndx_in, |
| 7374 | /* Functions to swap out external symbolic data. */ |
| 7375 | ecoff_swap_hdr_out, |
| 7376 | ecoff_swap_dnr_out, |
| 7377 | ecoff_swap_pdr_out, |
| 7378 | ecoff_swap_sym_out, |
| 7379 | ecoff_swap_opt_out, |
| 7380 | ecoff_swap_fdr_out, |
| 7381 | ecoff_swap_rfd_out, |
| 7382 | ecoff_swap_ext_out, |
| 7383 | _bfd_ecoff_swap_tir_out, |
| 7384 | _bfd_ecoff_swap_rndx_out, |
| 7385 | /* Function to read in symbolic data. */ |
| 7386 | _bfd_mips_elf_read_ecoff_info |
| 7387 | }; |
| 7388 | \f |
| 7389 | #define TARGET_LITTLE_SYM bfd_elf32_littlemips_vec |
| 7390 | #define TARGET_LITTLE_NAME "elf32-littlemips" |
| 7391 | #define TARGET_BIG_SYM bfd_elf32_bigmips_vec |
| 7392 | #define TARGET_BIG_NAME "elf32-bigmips" |
| 7393 | #define ELF_ARCH bfd_arch_mips |
| 7394 | #define ELF_MACHINE_CODE EM_MIPS |
| 7395 | |
| 7396 | /* The SVR4 MIPS ABI says that this should be 0x10000, but Irix 5 uses |
| 7397 | a value of 0x1000, and we are compatible. */ |
| 7398 | #define ELF_MAXPAGESIZE 0x1000 |
| 7399 | |
| 7400 | #define elf_backend_collect true |
| 7401 | #define elf_backend_type_change_ok true |
| 7402 | #define elf_info_to_howto 0 |
| 7403 | #define elf_info_to_howto_rel mips_info_to_howto_rel |
| 7404 | #define elf_backend_sym_is_global mips_elf_sym_is_global |
| 7405 | #define elf_backend_object_p mips_elf32_object_p |
| 7406 | #define elf_backend_section_from_shdr mips_elf32_section_from_shdr |
| 7407 | #define elf_backend_fake_sections _bfd_mips_elf_fake_sections |
| 7408 | #define elf_backend_section_from_bfd_section \ |
| 7409 | _bfd_mips_elf_section_from_bfd_section |
| 7410 | #define elf_backend_section_processing mips_elf32_section_processing |
| 7411 | #define elf_backend_symbol_processing _bfd_mips_elf_symbol_processing |
| 7412 | #define elf_backend_additional_program_headers \ |
| 7413 | mips_elf_additional_program_headers |
| 7414 | #define elf_backend_modify_segment_map mips_elf_modify_segment_map |
| 7415 | #define elf_backend_final_write_processing \ |
| 7416 | _bfd_mips_elf_final_write_processing |
| 7417 | #define elf_backend_ecoff_debug_swap &mips_elf32_ecoff_debug_swap |
| 7418 | |
| 7419 | #define bfd_elf32_bfd_is_local_label_name \ |
| 7420 | mips_elf_is_local_label_name |
| 7421 | #define bfd_elf32_find_nearest_line _bfd_mips_elf_find_nearest_line |
| 7422 | #define bfd_elf32_set_section_contents _bfd_mips_elf_set_section_contents |
| 7423 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 7424 | mips_elf_link_hash_table_create |
| 7425 | #define bfd_elf32_bfd_final_link mips_elf_final_link |
| 7426 | #define bfd_elf32_bfd_copy_private_bfd_data \ |
| 7427 | _bfd_mips_elf_copy_private_bfd_data |
| 7428 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
| 7429 | _bfd_mips_elf_merge_private_bfd_data |
| 7430 | #define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags |
| 7431 | #define elf_backend_add_symbol_hook mips_elf_add_symbol_hook |
| 7432 | #define elf_backend_create_dynamic_sections \ |
| 7433 | mips_elf_create_dynamic_sections |
| 7434 | #define elf_backend_check_relocs mips_elf_check_relocs |
| 7435 | #define elf_backend_adjust_dynamic_symbol \ |
| 7436 | mips_elf_adjust_dynamic_symbol |
| 7437 | #define elf_backend_always_size_sections \ |
| 7438 | mips_elf_always_size_sections |
| 7439 | #define elf_backend_size_dynamic_sections \ |
| 7440 | mips_elf_size_dynamic_sections |
| 7441 | #define elf_backend_relocate_section mips_elf_relocate_section |
| 7442 | #define elf_backend_link_output_symbol_hook \ |
| 7443 | mips_elf_link_output_symbol_hook |
| 7444 | #define elf_backend_finish_dynamic_symbol \ |
| 7445 | mips_elf_finish_dynamic_symbol |
| 7446 | #define elf_backend_finish_dynamic_sections \ |
| 7447 | mips_elf_finish_dynamic_sections |
| 7448 | |
| 7449 | #include "elf32-target.h" |