| 1 | /* BFD back-end for Renesas H8/300 ELF binaries. |
| 2 | Copyright (C) 1993-2015 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of BFD, the Binary File Descriptor library. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 19 | MA 02110-1301, USA. */ |
| 20 | |
| 21 | #include "sysdep.h" |
| 22 | #include "bfd.h" |
| 23 | #include "libbfd.h" |
| 24 | #include "elf-bfd.h" |
| 25 | #include "elf/h8.h" |
| 26 | |
| 27 | static reloc_howto_type *elf32_h8_reloc_type_lookup |
| 28 | (bfd *abfd, bfd_reloc_code_real_type code); |
| 29 | static void elf32_h8_info_to_howto |
| 30 | (bfd *, arelent *, Elf_Internal_Rela *); |
| 31 | static void elf32_h8_info_to_howto_rel |
| 32 | (bfd *, arelent *, Elf_Internal_Rela *); |
| 33 | static unsigned long elf32_h8_mach (flagword); |
| 34 | static void elf32_h8_final_write_processing (bfd *, bfd_boolean); |
| 35 | static bfd_boolean elf32_h8_object_p (bfd *); |
| 36 | static bfd_boolean elf32_h8_merge_private_bfd_data (bfd *, bfd *); |
| 37 | static bfd_boolean elf32_h8_relax_section |
| 38 | (bfd *, asection *, struct bfd_link_info *, bfd_boolean *); |
| 39 | static bfd_boolean elf32_h8_relax_delete_bytes |
| 40 | (bfd *, asection *, bfd_vma, int); |
| 41 | static bfd_boolean elf32_h8_symbol_address_p (bfd *, asection *, bfd_vma); |
| 42 | static bfd_byte *elf32_h8_get_relocated_section_contents |
| 43 | (bfd *, struct bfd_link_info *, struct bfd_link_order *, |
| 44 | bfd_byte *, bfd_boolean, asymbol **); |
| 45 | static bfd_reloc_status_type elf32_h8_final_link_relocate |
| 46 | (unsigned long, bfd *, bfd *, asection *, |
| 47 | bfd_byte *, bfd_vma, bfd_vma, bfd_vma, |
| 48 | struct bfd_link_info *, asection *, int); |
| 49 | static bfd_boolean elf32_h8_relocate_section |
| 50 | (bfd *, struct bfd_link_info *, bfd *, asection *, |
| 51 | bfd_byte *, Elf_Internal_Rela *, |
| 52 | Elf_Internal_Sym *, asection **); |
| 53 | static bfd_reloc_status_type special |
| 54 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 55 | |
| 56 | /* This does not include any relocation information, but should be |
| 57 | good enough for GDB or objdump to read the file. */ |
| 58 | |
| 59 | static reloc_howto_type h8_elf_howto_table[] = |
| 60 | { |
| 61 | #define R_H8_NONE_X 0 |
| 62 | HOWTO (R_H8_NONE, /* type */ |
| 63 | 0, /* rightshift */ |
| 64 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 65 | 0, /* bitsize */ |
| 66 | FALSE, /* pc_relative */ |
| 67 | 0, /* bitpos */ |
| 68 | complain_overflow_dont,/* complain_on_overflow */ |
| 69 | special, /* special_function */ |
| 70 | "R_H8_NONE", /* name */ |
| 71 | FALSE, /* partial_inplace */ |
| 72 | 0, /* src_mask */ |
| 73 | 0, /* dst_mask */ |
| 74 | FALSE), /* pcrel_offset */ |
| 75 | #define R_H8_DIR32_X (R_H8_NONE_X + 1) |
| 76 | HOWTO (R_H8_DIR32, /* type */ |
| 77 | 0, /* rightshift */ |
| 78 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 79 | 32, /* bitsize */ |
| 80 | FALSE, /* pc_relative */ |
| 81 | 0, /* bitpos */ |
| 82 | complain_overflow_dont,/* complain_on_overflow */ |
| 83 | special, /* special_function */ |
| 84 | "R_H8_DIR32", /* name */ |
| 85 | FALSE, /* partial_inplace */ |
| 86 | 0, /* src_mask */ |
| 87 | 0xffffffff, /* dst_mask */ |
| 88 | FALSE), /* pcrel_offset */ |
| 89 | #define R_H8_DIR16_X (R_H8_DIR32_X + 1) |
| 90 | HOWTO (R_H8_DIR16, /* type */ |
| 91 | 0, /* rightshift */ |
| 92 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 93 | 16, /* bitsize */ |
| 94 | FALSE, /* pc_relative */ |
| 95 | 0, /* bitpos */ |
| 96 | complain_overflow_dont,/* complain_on_overflow */ |
| 97 | special, /* special_function */ |
| 98 | "R_H8_DIR16", /* name */ |
| 99 | FALSE, /* partial_inplace */ |
| 100 | 0, /* src_mask */ |
| 101 | 0x0000ffff, /* dst_mask */ |
| 102 | FALSE), /* pcrel_offset */ |
| 103 | #define R_H8_DIR8_X (R_H8_DIR16_X + 1) |
| 104 | HOWTO (R_H8_DIR8, /* type */ |
| 105 | 0, /* rightshift */ |
| 106 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 107 | 8, /* bitsize */ |
| 108 | FALSE, /* pc_relative */ |
| 109 | 0, /* bitpos */ |
| 110 | complain_overflow_dont,/* complain_on_overflow */ |
| 111 | special, /* special_function */ |
| 112 | "R_H8_DIR8", /* name */ |
| 113 | FALSE, /* partial_inplace */ |
| 114 | 0, /* src_mask */ |
| 115 | 0x000000ff, /* dst_mask */ |
| 116 | FALSE), /* pcrel_offset */ |
| 117 | #define R_H8_DIR16A8_X (R_H8_DIR8_X + 1) |
| 118 | HOWTO (R_H8_DIR16A8, /* type */ |
| 119 | 0, /* rightshift */ |
| 120 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 121 | 16, /* bitsize */ |
| 122 | FALSE, /* pc_relative */ |
| 123 | 0, /* bitpos */ |
| 124 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 125 | special, /* special_function */ |
| 126 | "R_H8_DIR16A8", /* name */ |
| 127 | FALSE, /* partial_inplace */ |
| 128 | 0, /* src_mask */ |
| 129 | 0x0000ffff, /* dst_mask */ |
| 130 | FALSE), /* pcrel_offset */ |
| 131 | #define R_H8_DIR16R8_X (R_H8_DIR16A8_X + 1) |
| 132 | HOWTO (R_H8_DIR16R8, /* type */ |
| 133 | 0, /* rightshift */ |
| 134 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 135 | 16, /* bitsize */ |
| 136 | FALSE, /* pc_relative */ |
| 137 | 0, /* bitpos */ |
| 138 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 139 | special, /* special_function */ |
| 140 | "R_H8_DIR16R8", /* name */ |
| 141 | FALSE, /* partial_inplace */ |
| 142 | 0, /* src_mask */ |
| 143 | 0x0000ffff, /* dst_mask */ |
| 144 | FALSE), /* pcrel_offset */ |
| 145 | #define R_H8_DIR24A8_X (R_H8_DIR16R8_X + 1) |
| 146 | HOWTO (R_H8_DIR24A8, /* type */ |
| 147 | 0, /* rightshift */ |
| 148 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 149 | 24, /* bitsize */ |
| 150 | FALSE, /* pc_relative */ |
| 151 | 0, /* bitpos */ |
| 152 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 153 | special, /* special_function */ |
| 154 | "R_H8_DIR24A8", /* name */ |
| 155 | TRUE, /* partial_inplace */ |
| 156 | 0xff000000, /* src_mask */ |
| 157 | 0x00ffffff, /* dst_mask */ |
| 158 | FALSE), /* pcrel_offset */ |
| 159 | #define R_H8_DIR24R8_X (R_H8_DIR24A8_X + 1) |
| 160 | HOWTO (R_H8_DIR24R8, /* type */ |
| 161 | 0, /* rightshift */ |
| 162 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 163 | 24, /* bitsize */ |
| 164 | FALSE, /* pc_relative */ |
| 165 | 0, /* bitpos */ |
| 166 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 167 | special, /* special_function */ |
| 168 | "R_H8_DIR24R8", /* name */ |
| 169 | TRUE, /* partial_inplace */ |
| 170 | 0xff000000, /* src_mask */ |
| 171 | 0x00ffffff, /* dst_mask */ |
| 172 | FALSE), /* pcrel_offset */ |
| 173 | #define R_H8_DIR32A16_X (R_H8_DIR24R8_X + 1) |
| 174 | HOWTO (R_H8_DIR32A16, /* type */ |
| 175 | 0, /* rightshift */ |
| 176 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 177 | 32, /* bitsize */ |
| 178 | FALSE, /* pc_relative */ |
| 179 | 0, /* bitpos */ |
| 180 | complain_overflow_dont,/* complain_on_overflow */ |
| 181 | special, /* special_function */ |
| 182 | "R_H8_DIR32A16", /* name */ |
| 183 | FALSE, /* partial_inplace */ |
| 184 | 0, /* src_mask */ |
| 185 | 0xffffffff, /* dst_mask */ |
| 186 | FALSE), /* pcrel_offset */ |
| 187 | #define R_H8_DISP32A16_X (R_H8_DIR32A16_X + 1) |
| 188 | HOWTO (R_H8_DISP32A16, /* type */ |
| 189 | 0, /* rightshift */ |
| 190 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 191 | 32, /* bitsize */ |
| 192 | FALSE, /* pc_relative */ |
| 193 | 0, /* bitpos */ |
| 194 | complain_overflow_dont,/* complain_on_overflow */ |
| 195 | special, /* special_function */ |
| 196 | "R_H8_DISP32A16", /* name */ |
| 197 | FALSE, /* partial_inplace */ |
| 198 | 0, /* src_mask */ |
| 199 | 0xffffffff, /* dst_mask */ |
| 200 | FALSE), /* pcrel_offset */ |
| 201 | #define R_H8_PCREL16_X (R_H8_DISP32A16_X + 1) |
| 202 | HOWTO (R_H8_PCREL16, /* type */ |
| 203 | 0, /* rightshift */ |
| 204 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 205 | 16, /* bitsize */ |
| 206 | TRUE, /* pc_relative */ |
| 207 | 0, /* bitpos */ |
| 208 | complain_overflow_signed,/* complain_on_overflow */ |
| 209 | special, /* special_function */ |
| 210 | "R_H8_PCREL16", /* name */ |
| 211 | FALSE, /* partial_inplace */ |
| 212 | 0xffff, /* src_mask */ |
| 213 | 0xffff, /* dst_mask */ |
| 214 | TRUE), /* pcrel_offset */ |
| 215 | #define R_H8_PCREL8_X (R_H8_PCREL16_X + 1) |
| 216 | HOWTO (R_H8_PCREL8, /* type */ |
| 217 | 0, /* rightshift */ |
| 218 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 219 | 8, /* bitsize */ |
| 220 | TRUE, /* pc_relative */ |
| 221 | 0, /* bitpos */ |
| 222 | complain_overflow_signed,/* complain_on_overflow */ |
| 223 | special, /* special_function */ |
| 224 | "R_H8_PCREL8", /* name */ |
| 225 | FALSE, /* partial_inplace */ |
| 226 | 0xff, /* src_mask */ |
| 227 | 0xff, /* dst_mask */ |
| 228 | TRUE), /* pcrel_offset */ |
| 229 | }; |
| 230 | |
| 231 | /* This structure is used to map BFD reloc codes to H8 ELF relocs. */ |
| 232 | |
| 233 | struct elf_reloc_map { |
| 234 | bfd_reloc_code_real_type bfd_reloc_val; |
| 235 | unsigned char howto_index; |
| 236 | }; |
| 237 | |
| 238 | /* An array mapping BFD reloc codes to H8 ELF relocs. */ |
| 239 | |
| 240 | static const struct elf_reloc_map h8_reloc_map[] = { |
| 241 | { BFD_RELOC_NONE, R_H8_NONE_X }, |
| 242 | { BFD_RELOC_32, R_H8_DIR32_X }, |
| 243 | { BFD_RELOC_16, R_H8_DIR16_X }, |
| 244 | { BFD_RELOC_8, R_H8_DIR8_X }, |
| 245 | { BFD_RELOC_H8_DIR16A8, R_H8_DIR16A8_X }, |
| 246 | { BFD_RELOC_H8_DIR16R8, R_H8_DIR16R8_X }, |
| 247 | { BFD_RELOC_H8_DIR24A8, R_H8_DIR24A8_X }, |
| 248 | { BFD_RELOC_H8_DIR24R8, R_H8_DIR24R8_X }, |
| 249 | { BFD_RELOC_H8_DIR32A16, R_H8_DIR32A16_X }, |
| 250 | { BFD_RELOC_H8_DISP32A16, R_H8_DISP32A16_X }, |
| 251 | { BFD_RELOC_16_PCREL, R_H8_PCREL16_X }, |
| 252 | { BFD_RELOC_8_PCREL, R_H8_PCREL8_X }, |
| 253 | }; |
| 254 | |
| 255 | |
| 256 | static reloc_howto_type * |
| 257 | elf32_h8_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 258 | bfd_reloc_code_real_type code) |
| 259 | { |
| 260 | unsigned int i; |
| 261 | |
| 262 | for (i = 0; i < sizeof (h8_reloc_map) / sizeof (struct elf_reloc_map); i++) |
| 263 | { |
| 264 | if (h8_reloc_map[i].bfd_reloc_val == code) |
| 265 | return &h8_elf_howto_table[(int) h8_reloc_map[i].howto_index]; |
| 266 | } |
| 267 | return NULL; |
| 268 | } |
| 269 | |
| 270 | static reloc_howto_type * |
| 271 | elf32_h8_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 272 | const char *r_name) |
| 273 | { |
| 274 | unsigned int i; |
| 275 | |
| 276 | for (i = 0; |
| 277 | i < sizeof (h8_elf_howto_table) / sizeof (h8_elf_howto_table[0]); |
| 278 | i++) |
| 279 | if (h8_elf_howto_table[i].name != NULL |
| 280 | && strcasecmp (h8_elf_howto_table[i].name, r_name) == 0) |
| 281 | return &h8_elf_howto_table[i]; |
| 282 | |
| 283 | return NULL; |
| 284 | } |
| 285 | |
| 286 | static void |
| 287 | elf32_h8_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc, |
| 288 | Elf_Internal_Rela *elf_reloc) |
| 289 | { |
| 290 | unsigned int r; |
| 291 | unsigned int i; |
| 292 | |
| 293 | r = ELF32_R_TYPE (elf_reloc->r_info); |
| 294 | for (i = 0; i < sizeof (h8_elf_howto_table) / sizeof (reloc_howto_type); i++) |
| 295 | if (h8_elf_howto_table[i].type == r) |
| 296 | { |
| 297 | bfd_reloc->howto = &h8_elf_howto_table[i]; |
| 298 | return; |
| 299 | } |
| 300 | abort (); |
| 301 | } |
| 302 | |
| 303 | static void |
| 304 | elf32_h8_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc, |
| 305 | Elf_Internal_Rela *elf_reloc ATTRIBUTE_UNUSED) |
| 306 | { |
| 307 | unsigned int r; |
| 308 | |
| 309 | abort (); |
| 310 | r = ELF32_R_TYPE (elf_reloc->r_info); |
| 311 | bfd_reloc->howto = &h8_elf_howto_table[r]; |
| 312 | } |
| 313 | |
| 314 | /* Special handling for H8/300 relocs. |
| 315 | We only come here for pcrel stuff and return normally if not an -r link. |
| 316 | When doing -r, we can't do any arithmetic for the pcrel stuff, because |
| 317 | we support relaxing on the H8/300 series chips. */ |
| 318 | static bfd_reloc_status_type |
| 319 | special (bfd *abfd ATTRIBUTE_UNUSED, |
| 320 | arelent *reloc_entry ATTRIBUTE_UNUSED, |
| 321 | asymbol *symbol ATTRIBUTE_UNUSED, |
| 322 | void * data ATTRIBUTE_UNUSED, |
| 323 | asection *input_section ATTRIBUTE_UNUSED, |
| 324 | bfd *output_bfd, |
| 325 | char **error_message ATTRIBUTE_UNUSED) |
| 326 | { |
| 327 | if (output_bfd == (bfd *) NULL) |
| 328 | return bfd_reloc_continue; |
| 329 | |
| 330 | /* Adjust the reloc address to that in the output section. */ |
| 331 | reloc_entry->address += input_section->output_offset; |
| 332 | return bfd_reloc_ok; |
| 333 | } |
| 334 | |
| 335 | /* Perform a relocation as part of a final link. */ |
| 336 | static bfd_reloc_status_type |
| 337 | elf32_h8_final_link_relocate (unsigned long r_type, bfd *input_bfd, |
| 338 | bfd *output_bfd ATTRIBUTE_UNUSED, |
| 339 | asection *input_section ATTRIBUTE_UNUSED, |
| 340 | bfd_byte *contents, bfd_vma offset, |
| 341 | bfd_vma value, bfd_vma addend, |
| 342 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 343 | asection *sym_sec ATTRIBUTE_UNUSED, |
| 344 | int is_local ATTRIBUTE_UNUSED) |
| 345 | { |
| 346 | bfd_byte *hit_data = contents + offset; |
| 347 | |
| 348 | switch (r_type) |
| 349 | { |
| 350 | case R_H8_NONE: |
| 351 | return bfd_reloc_ok; |
| 352 | |
| 353 | case R_H8_DIR32: |
| 354 | case R_H8_DIR32A16: |
| 355 | case R_H8_DISP32A16: |
| 356 | case R_H8_DIR24A8: |
| 357 | value += addend; |
| 358 | bfd_put_32 (input_bfd, value, hit_data); |
| 359 | return bfd_reloc_ok; |
| 360 | |
| 361 | case R_H8_DIR16: |
| 362 | case R_H8_DIR16A8: |
| 363 | case R_H8_DIR16R8: |
| 364 | value += addend; |
| 365 | bfd_put_16 (input_bfd, value, hit_data); |
| 366 | return bfd_reloc_ok; |
| 367 | |
| 368 | /* AKA R_RELBYTE */ |
| 369 | case R_H8_DIR8: |
| 370 | value += addend; |
| 371 | |
| 372 | bfd_put_8 (input_bfd, value, hit_data); |
| 373 | return bfd_reloc_ok; |
| 374 | |
| 375 | case R_H8_DIR24R8: |
| 376 | value += addend; |
| 377 | |
| 378 | /* HIT_DATA is the address for the first byte for the relocated |
| 379 | value. Subtract 1 so that we can manipulate the data in 32-bit |
| 380 | hunks. */ |
| 381 | hit_data--; |
| 382 | |
| 383 | /* Clear out the top byte in value. */ |
| 384 | value &= 0xffffff; |
| 385 | |
| 386 | /* Retrieve the type byte for value from the section contents. */ |
| 387 | value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000); |
| 388 | |
| 389 | /* Now scribble it out in one 32-bit hunk. */ |
| 390 | bfd_put_32 (input_bfd, value, hit_data); |
| 391 | return bfd_reloc_ok; |
| 392 | |
| 393 | case R_H8_PCREL16: |
| 394 | value -= (input_section->output_section->vma |
| 395 | + input_section->output_offset); |
| 396 | value -= offset; |
| 397 | value += addend; |
| 398 | |
| 399 | /* The value is relative to the start of the instruction, |
| 400 | not the relocation offset. Subtract 2 to account for |
| 401 | this minor issue. */ |
| 402 | value -= 2; |
| 403 | |
| 404 | bfd_put_16 (input_bfd, value, hit_data); |
| 405 | return bfd_reloc_ok; |
| 406 | |
| 407 | case R_H8_PCREL8: |
| 408 | value -= (input_section->output_section->vma |
| 409 | + input_section->output_offset); |
| 410 | value -= offset; |
| 411 | value += addend; |
| 412 | |
| 413 | /* The value is relative to the start of the instruction, |
| 414 | not the relocation offset. Subtract 1 to account for |
| 415 | this minor issue. */ |
| 416 | value -= 1; |
| 417 | |
| 418 | bfd_put_8 (input_bfd, value, hit_data); |
| 419 | return bfd_reloc_ok; |
| 420 | |
| 421 | default: |
| 422 | return bfd_reloc_notsupported; |
| 423 | } |
| 424 | } |
| 425 | \f |
| 426 | /* Relocate an H8 ELF section. */ |
| 427 | static bfd_boolean |
| 428 | elf32_h8_relocate_section (bfd *output_bfd, struct bfd_link_info *info, |
| 429 | bfd *input_bfd, asection *input_section, |
| 430 | bfd_byte *contents, Elf_Internal_Rela *relocs, |
| 431 | Elf_Internal_Sym *local_syms, |
| 432 | asection **local_sections) |
| 433 | { |
| 434 | Elf_Internal_Shdr *symtab_hdr; |
| 435 | struct elf_link_hash_entry **sym_hashes; |
| 436 | Elf_Internal_Rela *rel, *relend; |
| 437 | |
| 438 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 439 | sym_hashes = elf_sym_hashes (input_bfd); |
| 440 | |
| 441 | rel = relocs; |
| 442 | relend = relocs + input_section->reloc_count; |
| 443 | for (; rel < relend; rel++) |
| 444 | { |
| 445 | unsigned int r_type; |
| 446 | unsigned long r_symndx; |
| 447 | Elf_Internal_Sym *sym; |
| 448 | asection *sec; |
| 449 | struct elf_link_hash_entry *h; |
| 450 | bfd_vma relocation; |
| 451 | bfd_reloc_status_type r; |
| 452 | arelent bfd_reloc; |
| 453 | reloc_howto_type *howto; |
| 454 | |
| 455 | elf32_h8_info_to_howto (input_bfd, &bfd_reloc, rel); |
| 456 | howto = bfd_reloc.howto; |
| 457 | |
| 458 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 459 | r_type = ELF32_R_TYPE (rel->r_info); |
| 460 | h = NULL; |
| 461 | sym = NULL; |
| 462 | sec = NULL; |
| 463 | if (r_symndx < symtab_hdr->sh_info) |
| 464 | { |
| 465 | sym = local_syms + r_symndx; |
| 466 | sec = local_sections[r_symndx]; |
| 467 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 468 | } |
| 469 | else |
| 470 | { |
| 471 | bfd_boolean unresolved_reloc, warned, ignored; |
| 472 | |
| 473 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 474 | r_symndx, symtab_hdr, sym_hashes, |
| 475 | h, sec, relocation, |
| 476 | unresolved_reloc, warned, ignored); |
| 477 | } |
| 478 | |
| 479 | if (sec != NULL && discarded_section (sec)) |
| 480 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 481 | rel, 1, relend, howto, 0, contents); |
| 482 | |
| 483 | if (info->relocatable) |
| 484 | continue; |
| 485 | |
| 486 | r = elf32_h8_final_link_relocate (r_type, input_bfd, output_bfd, |
| 487 | input_section, |
| 488 | contents, rel->r_offset, |
| 489 | relocation, rel->r_addend, |
| 490 | info, sec, h == NULL); |
| 491 | |
| 492 | if (r != bfd_reloc_ok) |
| 493 | { |
| 494 | const char *name; |
| 495 | const char *msg = (const char *) 0; |
| 496 | |
| 497 | if (h != NULL) |
| 498 | name = h->root.root.string; |
| 499 | else |
| 500 | { |
| 501 | name = (bfd_elf_string_from_elf_section |
| 502 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 503 | if (name == NULL || *name == '\0') |
| 504 | name = bfd_section_name (input_bfd, sec); |
| 505 | } |
| 506 | |
| 507 | switch (r) |
| 508 | { |
| 509 | case bfd_reloc_overflow: |
| 510 | if (! ((*info->callbacks->reloc_overflow) |
| 511 | (info, (h ? &h->root : NULL), name, howto->name, |
| 512 | (bfd_vma) 0, input_bfd, input_section, |
| 513 | rel->r_offset))) |
| 514 | return FALSE; |
| 515 | break; |
| 516 | |
| 517 | case bfd_reloc_undefined: |
| 518 | if (! ((*info->callbacks->undefined_symbol) |
| 519 | (info, name, input_bfd, input_section, |
| 520 | rel->r_offset, TRUE))) |
| 521 | return FALSE; |
| 522 | break; |
| 523 | |
| 524 | case bfd_reloc_outofrange: |
| 525 | msg = _("internal error: out of range error"); |
| 526 | goto common_error; |
| 527 | |
| 528 | case bfd_reloc_notsupported: |
| 529 | msg = _("internal error: unsupported relocation error"); |
| 530 | goto common_error; |
| 531 | |
| 532 | case bfd_reloc_dangerous: |
| 533 | msg = _("internal error: dangerous error"); |
| 534 | goto common_error; |
| 535 | |
| 536 | default: |
| 537 | msg = _("internal error: unknown error"); |
| 538 | /* fall through */ |
| 539 | |
| 540 | common_error: |
| 541 | if (!((*info->callbacks->warning) |
| 542 | (info, msg, name, input_bfd, input_section, |
| 543 | rel->r_offset))) |
| 544 | return FALSE; |
| 545 | break; |
| 546 | } |
| 547 | } |
| 548 | } |
| 549 | |
| 550 | return TRUE; |
| 551 | } |
| 552 | |
| 553 | /* Object files encode the specific H8 model they were compiled |
| 554 | for in the ELF flags field. |
| 555 | |
| 556 | Examine that field and return the proper BFD machine type for |
| 557 | the object file. */ |
| 558 | static unsigned long |
| 559 | elf32_h8_mach (flagword flags) |
| 560 | { |
| 561 | switch (flags & EF_H8_MACH) |
| 562 | { |
| 563 | case E_H8_MACH_H8300: |
| 564 | default: |
| 565 | return bfd_mach_h8300; |
| 566 | |
| 567 | case E_H8_MACH_H8300H: |
| 568 | return bfd_mach_h8300h; |
| 569 | |
| 570 | case E_H8_MACH_H8300S: |
| 571 | return bfd_mach_h8300s; |
| 572 | |
| 573 | case E_H8_MACH_H8300HN: |
| 574 | return bfd_mach_h8300hn; |
| 575 | |
| 576 | case E_H8_MACH_H8300SN: |
| 577 | return bfd_mach_h8300sn; |
| 578 | |
| 579 | case E_H8_MACH_H8300SX: |
| 580 | return bfd_mach_h8300sx; |
| 581 | |
| 582 | case E_H8_MACH_H8300SXN: |
| 583 | return bfd_mach_h8300sxn; |
| 584 | } |
| 585 | } |
| 586 | |
| 587 | /* The final processing done just before writing out a H8 ELF object |
| 588 | file. We use this opportunity to encode the BFD machine type |
| 589 | into the flags field in the object file. */ |
| 590 | |
| 591 | static void |
| 592 | elf32_h8_final_write_processing (bfd *abfd, |
| 593 | bfd_boolean linker ATTRIBUTE_UNUSED) |
| 594 | { |
| 595 | unsigned long val; |
| 596 | |
| 597 | switch (bfd_get_mach (abfd)) |
| 598 | { |
| 599 | default: |
| 600 | case bfd_mach_h8300: |
| 601 | val = E_H8_MACH_H8300; |
| 602 | break; |
| 603 | |
| 604 | case bfd_mach_h8300h: |
| 605 | val = E_H8_MACH_H8300H; |
| 606 | break; |
| 607 | |
| 608 | case bfd_mach_h8300s: |
| 609 | val = E_H8_MACH_H8300S; |
| 610 | break; |
| 611 | |
| 612 | case bfd_mach_h8300hn: |
| 613 | val = E_H8_MACH_H8300HN; |
| 614 | break; |
| 615 | |
| 616 | case bfd_mach_h8300sn: |
| 617 | val = E_H8_MACH_H8300SN; |
| 618 | break; |
| 619 | |
| 620 | case bfd_mach_h8300sx: |
| 621 | val = E_H8_MACH_H8300SX; |
| 622 | break; |
| 623 | |
| 624 | case bfd_mach_h8300sxn: |
| 625 | val = E_H8_MACH_H8300SXN; |
| 626 | break; |
| 627 | } |
| 628 | |
| 629 | elf_elfheader (abfd)->e_flags &= ~ (EF_H8_MACH); |
| 630 | elf_elfheader (abfd)->e_flags |= val; |
| 631 | } |
| 632 | |
| 633 | /* Return nonzero if ABFD represents a valid H8 ELF object file; also |
| 634 | record the encoded machine type found in the ELF flags. */ |
| 635 | |
| 636 | static bfd_boolean |
| 637 | elf32_h8_object_p (bfd *abfd) |
| 638 | { |
| 639 | bfd_default_set_arch_mach (abfd, bfd_arch_h8300, |
| 640 | elf32_h8_mach (elf_elfheader (abfd)->e_flags)); |
| 641 | return TRUE; |
| 642 | } |
| 643 | |
| 644 | /* Merge backend specific data from an object file to the output |
| 645 | object file when linking. The only data we need to copy at this |
| 646 | time is the architecture/machine information. */ |
| 647 | |
| 648 | static bfd_boolean |
| 649 | elf32_h8_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 650 | { |
| 651 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 652 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 653 | return TRUE; |
| 654 | |
| 655 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
| 656 | && bfd_get_mach (obfd) < bfd_get_mach (ibfd)) |
| 657 | { |
| 658 | if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), |
| 659 | bfd_get_mach (ibfd))) |
| 660 | return FALSE; |
| 661 | } |
| 662 | |
| 663 | return TRUE; |
| 664 | } |
| 665 | |
| 666 | /* This function handles relaxing for the H8.. |
| 667 | |
| 668 | There are a few relaxing opportunities available on the H8: |
| 669 | |
| 670 | jmp/jsr:24 -> bra/bsr:8 2 bytes |
| 671 | The jmp may be completely eliminated if the previous insn is a |
| 672 | conditional branch to the insn after the jump. In that case |
| 673 | we invert the branch and delete the jump and save 4 bytes. |
| 674 | |
| 675 | bCC:16 -> bCC:8 2 bytes |
| 676 | bsr:16 -> bsr:8 2 bytes |
| 677 | |
| 678 | bset:16 -> bset:8 2 bytes |
| 679 | bset:24/32 -> bset:8 4 bytes |
| 680 | (also applicable to other bit manipulation instructions) |
| 681 | |
| 682 | mov.b:16 -> mov.b:8 2 bytes |
| 683 | mov.b:24/32 -> mov.b:8 4 bytes |
| 684 | |
| 685 | bset:24/32 -> bset:16 2 bytes |
| 686 | (also applicable to other bit manipulation instructions) |
| 687 | |
| 688 | mov.[bwl]:24/32 -> mov.[bwl]:16 2 bytes |
| 689 | |
| 690 | mov.[bwl] @(displ:24/32+ERx) -> mov.[bwl] @(displ:16+ERx) 4 bytes. */ |
| 691 | |
| 692 | static bfd_boolean |
| 693 | elf32_h8_relax_section (bfd *abfd, asection *sec, |
| 694 | struct bfd_link_info *link_info, bfd_boolean *again) |
| 695 | { |
| 696 | Elf_Internal_Shdr *symtab_hdr; |
| 697 | Elf_Internal_Rela *internal_relocs; |
| 698 | Elf_Internal_Rela *irel, *irelend; |
| 699 | bfd_byte *contents = NULL; |
| 700 | Elf_Internal_Sym *isymbuf = NULL; |
| 701 | static asection *last_input_section = NULL; |
| 702 | static Elf_Internal_Rela *last_reloc = NULL; |
| 703 | |
| 704 | /* Assume nothing changes. */ |
| 705 | *again = FALSE; |
| 706 | |
| 707 | /* We don't have to do anything for a relocatable link, if |
| 708 | this section does not have relocs, or if this is not a |
| 709 | code section. */ |
| 710 | if (link_info->relocatable |
| 711 | || (sec->flags & SEC_RELOC) == 0 |
| 712 | || sec->reloc_count == 0 |
| 713 | || (sec->flags & SEC_CODE) == 0) |
| 714 | return TRUE; |
| 715 | |
| 716 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 717 | |
| 718 | /* Get a copy of the native relocations. */ |
| 719 | internal_relocs = (_bfd_elf_link_read_relocs |
| 720 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, |
| 721 | link_info->keep_memory)); |
| 722 | if (internal_relocs == NULL) |
| 723 | goto error_return; |
| 724 | |
| 725 | if (sec != last_input_section) |
| 726 | last_reloc = NULL; |
| 727 | |
| 728 | last_input_section = sec; |
| 729 | |
| 730 | /* Walk through the relocs looking for relaxing opportunities. */ |
| 731 | irelend = internal_relocs + sec->reloc_count; |
| 732 | for (irel = internal_relocs; irel < irelend; irel++) |
| 733 | { |
| 734 | bfd_vma symval; |
| 735 | |
| 736 | { |
| 737 | arelent bfd_reloc; |
| 738 | |
| 739 | elf32_h8_info_to_howto (abfd, &bfd_reloc, irel); |
| 740 | } |
| 741 | /* Keep track of the previous reloc so that we can delete |
| 742 | some long jumps created by the compiler. */ |
| 743 | if (irel != internal_relocs) |
| 744 | last_reloc = irel - 1; |
| 745 | |
| 746 | switch(ELF32_R_TYPE (irel->r_info)) |
| 747 | { |
| 748 | case R_H8_DIR24R8: |
| 749 | case R_H8_PCREL16: |
| 750 | case R_H8_DIR16A8: |
| 751 | case R_H8_DIR24A8: |
| 752 | case R_H8_DIR32A16: |
| 753 | case R_H8_DISP32A16: |
| 754 | break; |
| 755 | default: |
| 756 | continue; |
| 757 | } |
| 758 | |
| 759 | /* Get the section contents if we haven't done so already. */ |
| 760 | if (contents == NULL) |
| 761 | { |
| 762 | /* Get cached copy if it exists. */ |
| 763 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 764 | contents = elf_section_data (sec)->this_hdr.contents; |
| 765 | else |
| 766 | { |
| 767 | /* Go get them off disk. */ |
| 768 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) |
| 769 | goto error_return; |
| 770 | } |
| 771 | } |
| 772 | |
| 773 | /* Read this BFD's local symbols if we haven't done so already. */ |
| 774 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) |
| 775 | { |
| 776 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 777 | if (isymbuf == NULL) |
| 778 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 779 | symtab_hdr->sh_info, 0, |
| 780 | NULL, NULL, NULL); |
| 781 | if (isymbuf == NULL) |
| 782 | goto error_return; |
| 783 | } |
| 784 | |
| 785 | /* Get the value of the symbol referred to by the reloc. */ |
| 786 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 787 | { |
| 788 | /* A local symbol. */ |
| 789 | Elf_Internal_Sym *isym; |
| 790 | asection *sym_sec; |
| 791 | |
| 792 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 793 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 794 | symval = isym->st_value; |
| 795 | /* If the reloc is absolute, it will not have |
| 796 | a symbol or section associated with it. */ |
| 797 | if (sym_sec) |
| 798 | symval += sym_sec->output_section->vma |
| 799 | + sym_sec->output_offset; |
| 800 | } |
| 801 | else |
| 802 | { |
| 803 | unsigned long indx; |
| 804 | struct elf_link_hash_entry *h; |
| 805 | |
| 806 | /* An external symbol. */ |
| 807 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 808 | h = elf_sym_hashes (abfd)[indx]; |
| 809 | BFD_ASSERT (h != NULL); |
| 810 | if (h->root.type != bfd_link_hash_defined |
| 811 | && h->root.type != bfd_link_hash_defweak) |
| 812 | { |
| 813 | /* This appears to be a reference to an undefined |
| 814 | symbol. Just ignore it--it will be caught by the |
| 815 | regular reloc processing. */ |
| 816 | continue; |
| 817 | } |
| 818 | |
| 819 | symval = (h->root.u.def.value |
| 820 | + h->root.u.def.section->output_section->vma |
| 821 | + h->root.u.def.section->output_offset); |
| 822 | } |
| 823 | |
| 824 | /* For simplicity of coding, we are going to modify the section |
| 825 | contents, the section relocs, and the BFD symbol table. We |
| 826 | must tell the rest of the code not to free up this |
| 827 | information. It would be possible to instead create a table |
| 828 | of changes which have to be made, as is done in coff-mips.c; |
| 829 | that would be more work, but would require less memory when |
| 830 | the linker is run. */ |
| 831 | switch (ELF32_R_TYPE (irel->r_info)) |
| 832 | { |
| 833 | /* Try to turn a 24-bit absolute branch/call into an 8-bit |
| 834 | pc-relative branch/call. */ |
| 835 | case R_H8_DIR24R8: |
| 836 | { |
| 837 | bfd_vma value = symval + irel->r_addend; |
| 838 | bfd_vma dot, gap; |
| 839 | |
| 840 | /* Get the address of this instruction. */ |
| 841 | dot = (sec->output_section->vma |
| 842 | + sec->output_offset + irel->r_offset - 1); |
| 843 | |
| 844 | /* Compute the distance from this insn to the branch target. */ |
| 845 | gap = value - dot; |
| 846 | |
| 847 | /* If the distance is within -126..+130 inclusive, then we can |
| 848 | relax this jump. +130 is valid since the target will move |
| 849 | two bytes closer if we do relax this branch. */ |
| 850 | if ((int) gap >= -126 && (int) gap <= 130) |
| 851 | { |
| 852 | unsigned char code; |
| 853 | |
| 854 | /* Note that we've changed the relocs, section contents, |
| 855 | etc. */ |
| 856 | elf_section_data (sec)->relocs = internal_relocs; |
| 857 | elf_section_data (sec)->this_hdr.contents = contents; |
| 858 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 859 | |
| 860 | /* Get the instruction code being relaxed. */ |
| 861 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 862 | |
| 863 | /* If the previous instruction conditionally jumped around |
| 864 | this instruction, we may be able to reverse the condition |
| 865 | and redirect the previous instruction to the target of |
| 866 | this instruction. |
| 867 | |
| 868 | Such sequences are used by the compiler to deal with |
| 869 | long conditional branches. |
| 870 | |
| 871 | Only perform this optimisation for jumps (code 0x5a) not |
| 872 | subroutine calls, as otherwise it could transform: |
| 873 | |
| 874 | mov.w r0,r0 |
| 875 | beq .L1 |
| 876 | jsr @_bar |
| 877 | .L1: rts |
| 878 | _bar: rts |
| 879 | into: |
| 880 | mov.w r0,r0 |
| 881 | bne _bar |
| 882 | rts |
| 883 | _bar: rts |
| 884 | |
| 885 | which changes the call (jsr) into a branch (bne). */ |
| 886 | if (code == 0x5a /* jmp24. */ |
| 887 | && (int) gap <= 130 |
| 888 | && (int) gap >= -128 |
| 889 | && last_reloc |
| 890 | && ELF32_R_TYPE (last_reloc->r_info) == R_H8_PCREL8 |
| 891 | && ELF32_R_SYM (last_reloc->r_info) < symtab_hdr->sh_info) |
| 892 | { |
| 893 | bfd_vma last_value; |
| 894 | asection *last_sym_sec; |
| 895 | Elf_Internal_Sym *last_sym; |
| 896 | |
| 897 | /* We will need to examine the symbol used by the |
| 898 | previous relocation. */ |
| 899 | |
| 900 | last_sym = isymbuf + ELF32_R_SYM (last_reloc->r_info); |
| 901 | last_sym_sec |
| 902 | = bfd_section_from_elf_index (abfd, last_sym->st_shndx); |
| 903 | last_value = (last_sym->st_value |
| 904 | + last_sym_sec->output_section->vma |
| 905 | + last_sym_sec->output_offset); |
| 906 | |
| 907 | /* Verify that the previous relocation was for a |
| 908 | branch around this instruction and that no symbol |
| 909 | exists at the current location. */ |
| 910 | if (last_value == dot + 4 |
| 911 | && last_reloc->r_offset + 2 == irel->r_offset |
| 912 | && ! elf32_h8_symbol_address_p (abfd, sec, dot)) |
| 913 | { |
| 914 | /* We can eliminate this jump. Twiddle the |
| 915 | previous relocation as necessary. */ |
| 916 | irel->r_info |
| 917 | = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 918 | ELF32_R_TYPE (R_H8_NONE)); |
| 919 | |
| 920 | last_reloc->r_info |
| 921 | = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 922 | ELF32_R_TYPE (R_H8_PCREL8)); |
| 923 | last_reloc->r_addend = irel->r_addend; |
| 924 | |
| 925 | code = bfd_get_8 (abfd, |
| 926 | contents + last_reloc->r_offset - 1); |
| 927 | code ^= 1; |
| 928 | bfd_put_8 (abfd, |
| 929 | code, |
| 930 | contents + last_reloc->r_offset - 1); |
| 931 | |
| 932 | /* Delete four bytes of data. */ |
| 933 | if (!elf32_h8_relax_delete_bytes (abfd, sec, |
| 934 | irel->r_offset - 1, |
| 935 | 4)) |
| 936 | goto error_return; |
| 937 | |
| 938 | *again = TRUE; |
| 939 | break; |
| 940 | } |
| 941 | } |
| 942 | |
| 943 | if (code == 0x5e) |
| 944 | /* This is jsr24 */ |
| 945 | bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 1); /* bsr8. */ |
| 946 | else if (code == 0x5a) |
| 947 | /* This is jmp24 */ |
| 948 | bfd_put_8 (abfd, 0x40, contents + irel->r_offset - 1); /* bra8. */ |
| 949 | else |
| 950 | abort (); |
| 951 | |
| 952 | /* Fix the relocation's type. */ |
| 953 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 954 | R_H8_PCREL8); |
| 955 | |
| 956 | /* Delete two bytes of data. */ |
| 957 | if (!elf32_h8_relax_delete_bytes (abfd, sec, |
| 958 | irel->r_offset + 1, 2)) |
| 959 | goto error_return; |
| 960 | |
| 961 | /* That will change things, so, we should relax again. |
| 962 | Note that this is not required, and it may be slow. */ |
| 963 | *again = TRUE; |
| 964 | } |
| 965 | break; |
| 966 | } |
| 967 | |
| 968 | /* Try to turn a 16-bit pc-relative branch into a 8-bit pc-relative |
| 969 | branch. */ |
| 970 | case R_H8_PCREL16: |
| 971 | { |
| 972 | bfd_vma value = symval + irel->r_addend; |
| 973 | bfd_vma dot; |
| 974 | bfd_vma gap; |
| 975 | |
| 976 | /* Get the address of this instruction. */ |
| 977 | dot = (sec->output_section->vma |
| 978 | + sec->output_offset |
| 979 | + irel->r_offset - 2); |
| 980 | |
| 981 | gap = value - dot; |
| 982 | |
| 983 | /* If the distance is within -126..+130 inclusive, then we can |
| 984 | relax this jump. +130 is valid since the target will move |
| 985 | two bytes closer if we do relax this branch. */ |
| 986 | if ((int) gap >= -126 && (int) gap <= 130) |
| 987 | { |
| 988 | unsigned char code; |
| 989 | |
| 990 | /* Note that we've changed the relocs, section contents, |
| 991 | etc. */ |
| 992 | elf_section_data (sec)->relocs = internal_relocs; |
| 993 | elf_section_data (sec)->this_hdr.contents = contents; |
| 994 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 995 | |
| 996 | /* Get the opcode. */ |
| 997 | code = bfd_get_8 (abfd, contents + irel->r_offset - 2); |
| 998 | |
| 999 | if (code == 0x58) |
| 1000 | { |
| 1001 | /* bCC:16 -> bCC:8 */ |
| 1002 | /* Get the second byte of the original insn, which |
| 1003 | contains the condition code. */ |
| 1004 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 1005 | |
| 1006 | /* Compute the first byte of the relaxed |
| 1007 | instruction. The original sequence 0x58 0xX0 |
| 1008 | is relaxed to 0x4X, where X represents the |
| 1009 | condition code. */ |
| 1010 | code &= 0xf0; |
| 1011 | code >>= 4; |
| 1012 | code |= 0x40; |
| 1013 | bfd_put_8 (abfd, code, contents + irel->r_offset - 2); /* bCC:8. */ |
| 1014 | } |
| 1015 | else if (code == 0x5c) /* bsr16. */ |
| 1016 | /* This is bsr. */ |
| 1017 | bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 2); /* bsr8. */ |
| 1018 | else |
| 1019 | /* Might be MOVSD. */ |
| 1020 | break; |
| 1021 | |
| 1022 | /* Fix the relocation's type. */ |
| 1023 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 1024 | R_H8_PCREL8); |
| 1025 | irel->r_offset--; |
| 1026 | |
| 1027 | /* Delete two bytes of data. */ |
| 1028 | if (!elf32_h8_relax_delete_bytes (abfd, sec, |
| 1029 | irel->r_offset + 1, 2)) |
| 1030 | goto error_return; |
| 1031 | |
| 1032 | /* That will change things, so, we should relax again. |
| 1033 | Note that this is not required, and it may be slow. */ |
| 1034 | *again = TRUE; |
| 1035 | } |
| 1036 | break; |
| 1037 | } |
| 1038 | |
| 1039 | /* This is a 16-bit absolute address in one of the following |
| 1040 | instructions: |
| 1041 | |
| 1042 | "band", "bclr", "biand", "bild", "bior", "bist", "bixor", |
| 1043 | "bld", "bnot", "bor", "bset", "bst", "btst", "bxor", and |
| 1044 | "mov.b" |
| 1045 | |
| 1046 | We may relax this into an 8-bit absolute address if it's in |
| 1047 | the right range. */ |
| 1048 | case R_H8_DIR16A8: |
| 1049 | { |
| 1050 | bfd_vma value; |
| 1051 | |
| 1052 | value = bfd_h8300_pad_address (abfd, symval + irel->r_addend); |
| 1053 | if (value >= 0xffffff00u) |
| 1054 | { |
| 1055 | unsigned char code; |
| 1056 | unsigned char temp_code; |
| 1057 | |
| 1058 | /* Note that we've changed the relocs, section contents, |
| 1059 | etc. */ |
| 1060 | elf_section_data (sec)->relocs = internal_relocs; |
| 1061 | elf_section_data (sec)->this_hdr.contents = contents; |
| 1062 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 1063 | |
| 1064 | /* Get the opcode. */ |
| 1065 | code = bfd_get_8 (abfd, contents + irel->r_offset - 2); |
| 1066 | |
| 1067 | /* All instructions with R_H8_DIR16A8 start with |
| 1068 | 0x6a. */ |
| 1069 | if (code != 0x6a) |
| 1070 | abort (); |
| 1071 | |
| 1072 | temp_code = code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 1073 | /* If this is a mov.b instruction, clear the lower |
| 1074 | nibble, which contains the source/destination |
| 1075 | register number. */ |
| 1076 | if ((temp_code & 0x10) != 0x10) |
| 1077 | temp_code &= 0xf0; |
| 1078 | |
| 1079 | switch (temp_code) |
| 1080 | { |
| 1081 | case 0x00: |
| 1082 | /* This is mov.b @aa:16,Rd. */ |
| 1083 | bfd_put_8 (abfd, (code & 0xf) | 0x20, |
| 1084 | contents + irel->r_offset - 2); |
| 1085 | break; |
| 1086 | case 0x80: |
| 1087 | /* This is mov.b Rs,@aa:16. */ |
| 1088 | bfd_put_8 (abfd, (code & 0xf) | 0x30, |
| 1089 | contents + irel->r_offset - 2); |
| 1090 | break; |
| 1091 | case 0x18: |
| 1092 | /* This is a bit-maniputation instruction that |
| 1093 | stores one bit into memory, one of "bclr", |
| 1094 | "bist", "bnot", "bset", and "bst". */ |
| 1095 | bfd_put_8 (abfd, 0x7f, contents + irel->r_offset - 2); |
| 1096 | break; |
| 1097 | case 0x10: |
| 1098 | /* This is a bit-maniputation instruction that |
| 1099 | loads one bit from memory, one of "band", |
| 1100 | "biand", "bild", "bior", "bixor", "bld", "bor", |
| 1101 | "btst", and "bxor". */ |
| 1102 | bfd_put_8 (abfd, 0x7e, contents + irel->r_offset - 2); |
| 1103 | break; |
| 1104 | default: |
| 1105 | abort (); |
| 1106 | } |
| 1107 | |
| 1108 | /* Fix the relocation's type. */ |
| 1109 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 1110 | R_H8_DIR8); |
| 1111 | |
| 1112 | /* Move the relocation. */ |
| 1113 | irel->r_offset--; |
| 1114 | |
| 1115 | /* Delete two bytes of data. */ |
| 1116 | if (!elf32_h8_relax_delete_bytes (abfd, sec, |
| 1117 | irel->r_offset + 1, 2)) |
| 1118 | goto error_return; |
| 1119 | |
| 1120 | /* That will change things, so, we should relax again. |
| 1121 | Note that this is not required, and it may be slow. */ |
| 1122 | *again = TRUE; |
| 1123 | } |
| 1124 | break; |
| 1125 | } |
| 1126 | |
| 1127 | /* This is a 24-bit absolute address in one of the following |
| 1128 | instructions: |
| 1129 | |
| 1130 | "band", "bclr", "biand", "bild", "bior", "bist", "bixor", |
| 1131 | "bld", "bnot", "bor", "bset", "bst", "btst", "bxor", and |
| 1132 | "mov.b" |
| 1133 | |
| 1134 | We may relax this into an 8-bit absolute address if it's in |
| 1135 | the right range. */ |
| 1136 | case R_H8_DIR24A8: |
| 1137 | { |
| 1138 | bfd_vma value; |
| 1139 | |
| 1140 | value = bfd_h8300_pad_address (abfd, symval + irel->r_addend); |
| 1141 | if (value >= 0xffffff00u) |
| 1142 | { |
| 1143 | unsigned char code; |
| 1144 | unsigned char temp_code; |
| 1145 | |
| 1146 | /* Note that we've changed the relocs, section contents, |
| 1147 | etc. */ |
| 1148 | elf_section_data (sec)->relocs = internal_relocs; |
| 1149 | elf_section_data (sec)->this_hdr.contents = contents; |
| 1150 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 1151 | |
| 1152 | /* Get the opcode. */ |
| 1153 | code = bfd_get_8 (abfd, contents + irel->r_offset - 2); |
| 1154 | |
| 1155 | /* All instructions with R_H8_DIR24A8 start with |
| 1156 | 0x6a. */ |
| 1157 | if (code != 0x6a) |
| 1158 | abort (); |
| 1159 | |
| 1160 | temp_code = code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 1161 | |
| 1162 | /* If this is a mov.b instruction, clear the lower |
| 1163 | nibble, which contains the source/destination |
| 1164 | register number. */ |
| 1165 | if ((temp_code & 0x30) != 0x30) |
| 1166 | temp_code &= 0xf0; |
| 1167 | |
| 1168 | switch (temp_code) |
| 1169 | { |
| 1170 | case 0x20: |
| 1171 | /* This is mov.b @aa:24/32,Rd. */ |
| 1172 | bfd_put_8 (abfd, (code & 0xf) | 0x20, |
| 1173 | contents + irel->r_offset - 2); |
| 1174 | break; |
| 1175 | case 0xa0: |
| 1176 | /* This is mov.b Rs,@aa:24/32. */ |
| 1177 | bfd_put_8 (abfd, (code & 0xf) | 0x30, |
| 1178 | contents + irel->r_offset - 2); |
| 1179 | break; |
| 1180 | case 0x38: |
| 1181 | /* This is a bit-maniputation instruction that |
| 1182 | stores one bit into memory, one of "bclr", |
| 1183 | "bist", "bnot", "bset", and "bst". */ |
| 1184 | bfd_put_8 (abfd, 0x7f, contents + irel->r_offset - 2); |
| 1185 | break; |
| 1186 | case 0x30: |
| 1187 | /* This is a bit-maniputation instruction that |
| 1188 | loads one bit from memory, one of "band", |
| 1189 | "biand", "bild", "bior", "bixor", "bld", "bor", |
| 1190 | "btst", and "bxor". */ |
| 1191 | bfd_put_8 (abfd, 0x7e, contents + irel->r_offset - 2); |
| 1192 | break; |
| 1193 | default: |
| 1194 | abort(); |
| 1195 | } |
| 1196 | |
| 1197 | /* Fix the relocation's type. */ |
| 1198 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 1199 | R_H8_DIR8); |
| 1200 | irel->r_offset--; |
| 1201 | |
| 1202 | /* Delete four bytes of data. */ |
| 1203 | if (!elf32_h8_relax_delete_bytes (abfd, sec, |
| 1204 | irel->r_offset + 1, 4)) |
| 1205 | goto error_return; |
| 1206 | |
| 1207 | /* That will change things, so, we should relax again. |
| 1208 | Note that this is not required, and it may be slow. */ |
| 1209 | *again = TRUE; |
| 1210 | break; |
| 1211 | } |
| 1212 | } |
| 1213 | |
| 1214 | /* Fall through. */ |
| 1215 | |
| 1216 | /* This is a 24-/32-bit absolute address in one of the |
| 1217 | following instructions: |
| 1218 | |
| 1219 | "band", "bclr", "biand", "bild", "bior", "bist", |
| 1220 | "bixor", "bld", "bnot", "bor", "bset", "bst", "btst", |
| 1221 | "bxor", "ldc.w", "stc.w" and "mov.[bwl]" |
| 1222 | |
| 1223 | We may relax this into an 16-bit absolute address if it's |
| 1224 | in the right range. */ |
| 1225 | case R_H8_DIR32A16: |
| 1226 | { |
| 1227 | bfd_vma value; |
| 1228 | |
| 1229 | value = bfd_h8300_pad_address (abfd, symval + irel->r_addend); |
| 1230 | if (value <= 0x7fff || value >= 0xffff8000u) |
| 1231 | { |
| 1232 | unsigned char code; |
| 1233 | unsigned char op0, op1, op2, op3; |
| 1234 | unsigned char *op_ptr; |
| 1235 | |
| 1236 | /* Note that we've changed the relocs, section contents, |
| 1237 | etc. */ |
| 1238 | elf_section_data (sec)->relocs = internal_relocs; |
| 1239 | elf_section_data (sec)->this_hdr.contents = contents; |
| 1240 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 1241 | |
| 1242 | if (irel->r_offset >= 4) |
| 1243 | { |
| 1244 | /* Check for 4-byte MOVA relaxation (SH-specific). */ |
| 1245 | int second_reloc = 0; |
| 1246 | |
| 1247 | op_ptr = contents + irel->r_offset - 4; |
| 1248 | |
| 1249 | if (last_reloc) |
| 1250 | { |
| 1251 | arelent bfd_reloc; |
| 1252 | reloc_howto_type *h; |
| 1253 | bfd_vma last_reloc_size; |
| 1254 | |
| 1255 | elf32_h8_info_to_howto (abfd, &bfd_reloc, last_reloc); |
| 1256 | h = bfd_reloc.howto; |
| 1257 | last_reloc_size = 1 << h->size; |
| 1258 | if (last_reloc->r_offset + last_reloc_size |
| 1259 | == irel->r_offset) |
| 1260 | { |
| 1261 | op_ptr -= last_reloc_size; |
| 1262 | second_reloc = 1; |
| 1263 | } |
| 1264 | } |
| 1265 | |
| 1266 | if (irel + 1 < irelend) |
| 1267 | { |
| 1268 | Elf_Internal_Rela *next_reloc = irel + 1; |
| 1269 | arelent bfd_reloc; |
| 1270 | reloc_howto_type *h; |
| 1271 | bfd_vma next_reloc_size; |
| 1272 | |
| 1273 | elf32_h8_info_to_howto (abfd, &bfd_reloc, next_reloc); |
| 1274 | h = bfd_reloc.howto; |
| 1275 | next_reloc_size = 1 << h->size; |
| 1276 | if (next_reloc->r_offset + next_reloc_size |
| 1277 | == irel->r_offset) |
| 1278 | { |
| 1279 | op_ptr -= next_reloc_size; |
| 1280 | second_reloc = 1; |
| 1281 | } |
| 1282 | } |
| 1283 | |
| 1284 | op0 = bfd_get_8 (abfd, op_ptr + 0); |
| 1285 | op1 = bfd_get_8 (abfd, op_ptr + 1); |
| 1286 | op2 = bfd_get_8 (abfd, op_ptr + 2); |
| 1287 | op3 = bfd_get_8 (abfd, op_ptr + 3); |
| 1288 | |
| 1289 | if (op0 == 0x01 |
| 1290 | && (op1 & 0xdf) == 0x5f |
| 1291 | && (op2 & 0x40) == 0x40 |
| 1292 | && (op3 & 0x80) == 0x80) |
| 1293 | { |
| 1294 | if ((op2 & 0x08) == 0) |
| 1295 | second_reloc = 1; |
| 1296 | |
| 1297 | if (second_reloc) |
| 1298 | { |
| 1299 | op3 &= ~0x08; |
| 1300 | bfd_put_8 (abfd, op3, op_ptr + 3); |
| 1301 | } |
| 1302 | else |
| 1303 | { |
| 1304 | op2 &= ~0x08; |
| 1305 | bfd_put_8 (abfd, op2, op_ptr + 2); |
| 1306 | } |
| 1307 | goto r_h8_dir32a16_common; |
| 1308 | } |
| 1309 | } |
| 1310 | |
| 1311 | /* Now check for short version of MOVA. (SH-specific) */ |
| 1312 | op_ptr = contents + irel->r_offset - 2; |
| 1313 | op0 = bfd_get_8 (abfd, op_ptr + 0); |
| 1314 | op1 = bfd_get_8 (abfd, op_ptr + 1); |
| 1315 | |
| 1316 | if (op0 == 0x7a |
| 1317 | && (op1 & 0x88) == 0x80) |
| 1318 | { |
| 1319 | op1 |= 0x08; |
| 1320 | bfd_put_8 (abfd, op1, op_ptr + 1); |
| 1321 | goto r_h8_dir32a16_common; |
| 1322 | } |
| 1323 | |
| 1324 | /* Get the opcode. */ |
| 1325 | code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 1326 | |
| 1327 | /* Fix the opcode. For all the instructions that |
| 1328 | belong to this relaxation, we simply need to turn |
| 1329 | off bit 0x20 in the previous byte. */ |
| 1330 | code &= ~0x20; |
| 1331 | |
| 1332 | bfd_put_8 (abfd, code, contents + irel->r_offset - 1); |
| 1333 | |
| 1334 | r_h8_dir32a16_common: |
| 1335 | /* Fix the relocation's type. */ |
| 1336 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 1337 | R_H8_DIR16); |
| 1338 | |
| 1339 | /* Delete two bytes of data. */ |
| 1340 | if (!elf32_h8_relax_delete_bytes (abfd, sec, |
| 1341 | irel->r_offset + 1, 2)) |
| 1342 | goto error_return; |
| 1343 | |
| 1344 | /* That will change things, so, we should relax again. |
| 1345 | Note that this is not required, and it may be slow. */ |
| 1346 | *again = TRUE; |
| 1347 | } |
| 1348 | break; /* case R_H8_DIR32A16 */ |
| 1349 | } |
| 1350 | |
| 1351 | case R_H8_DISP32A16: |
| 1352 | /* mov.[bwl] @(displ:24/32+ERx) -> mov.[bwl] @(displ:16+ERx) 4 bytes |
| 1353 | It is assured that instruction uses at least 4 bytes opcode before |
| 1354 | reloc entry addressing mode "register indirect with displacement" |
| 1355 | relaxing options (all saving 4 bytes): |
| 1356 | 0x78 0sss0000 0x6A 0010dddd disp:32 mov.b @(d:32,ERs),Rd -> |
| 1357 | 0x6E 0sssdddd disp:16 mov.b @(d:16,ERs),Rd |
| 1358 | 0x78 0sss0000 0x6B 0010dddd disp:32 mov.w @(d:32,ERs),Rd -> |
| 1359 | 0x6F 0sssdddd disp:16 mov.w @(d:16,ERs),Rd |
| 1360 | 0x01 0x00 0x78 0sss0000 0x6B 00100ddd disp:32 mov.l @(d:32,ERs),ERd -> |
| 1361 | 0x01 0x00 0x6F 0sss0ddd disp:16 mov.l @(d:16,ERs),ERd |
| 1362 | |
| 1363 | 0x78 0ddd0000 0x6A 1010ssss disp:32 mov.b Rs,@(d:32,ERd) -> |
| 1364 | 0x6E 1dddssss disp:16 mov.b Rs,@(d:16,ERd) |
| 1365 | 0x78 0ddd0000 0x6B 1010ssss disp:32 mov.w Rs,@(d:32,ERd) -> |
| 1366 | 0x6F 1dddssss disp:16 mov.w Rs,@(d:16,ERd) |
| 1367 | 0x01 0x00 0x78 xddd0000 0x6B 10100sss disp:32 mov.l ERs,@(d:32,ERd) -> |
| 1368 | 0x01 0x00 0x6F 1ddd0sss disp:16 mov.l ERs,@(d:16,ERd) |
| 1369 | mov.l prefix 0x01 0x00 can be left as is and mov.l handled same |
| 1370 | as mov.w/ */ |
| 1371 | { |
| 1372 | bfd_vma value; |
| 1373 | |
| 1374 | value = bfd_h8300_pad_address (abfd, symval + irel->r_addend); |
| 1375 | if (value <= 0x7fff || value >= 0xffff8000u) |
| 1376 | { |
| 1377 | unsigned char op0, op1, op2, op3, op0n, op1n; |
| 1378 | int relax = 0; |
| 1379 | |
| 1380 | /* Note that we've changed the relocs, section contents, |
| 1381 | etc. */ |
| 1382 | elf_section_data (sec)->relocs = internal_relocs; |
| 1383 | elf_section_data (sec)->this_hdr.contents = contents; |
| 1384 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 1385 | |
| 1386 | if (irel->r_offset >= 4) |
| 1387 | { |
| 1388 | op0 = bfd_get_8 (abfd, contents + irel->r_offset - 4); |
| 1389 | op1 = bfd_get_8 (abfd, contents + irel->r_offset - 3); |
| 1390 | op2 = bfd_get_8 (abfd, contents + irel->r_offset - 2); |
| 1391 | op3 = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 1392 | |
| 1393 | if (op0 == 0x78) |
| 1394 | { |
| 1395 | switch(op2) |
| 1396 | { |
| 1397 | case 0x6A: |
| 1398 | if ((op1 & 0x8F) == 0x00 && (op3 & 0x70) == 0x20) |
| 1399 | { |
| 1400 | /* mov.b. */ |
| 1401 | op0n = 0x6E; |
| 1402 | relax = 1; |
| 1403 | } |
| 1404 | break; |
| 1405 | case 0x6B: |
| 1406 | if ((op1 & 0x0F) == 0x00 && (op3 & 0x70) == 0x20) |
| 1407 | { |
| 1408 | /* mov.w/l. */ |
| 1409 | op0n = 0x6F; |
| 1410 | relax = 1; |
| 1411 | } |
| 1412 | break; |
| 1413 | default: |
| 1414 | break; |
| 1415 | } |
| 1416 | } |
| 1417 | } |
| 1418 | |
| 1419 | if (relax) |
| 1420 | { |
| 1421 | op1n = (op3 & 0x8F) | (op1 & 0x70); |
| 1422 | bfd_put_8 (abfd, op0n, contents + irel->r_offset - 4); |
| 1423 | bfd_put_8 (abfd, op1n, contents + irel->r_offset - 3); |
| 1424 | |
| 1425 | /* Fix the relocation's type. */ |
| 1426 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_H8_DIR16); |
| 1427 | irel->r_offset -= 2; |
| 1428 | |
| 1429 | /* Delete four bytes of data. */ |
| 1430 | if (!elf32_h8_relax_delete_bytes (abfd, sec, irel->r_offset + 2, 4)) |
| 1431 | goto error_return; |
| 1432 | |
| 1433 | /* That will change things, so, we should relax again. |
| 1434 | Note that this is not required, and it may be slow. */ |
| 1435 | *again = TRUE; |
| 1436 | } |
| 1437 | } |
| 1438 | } |
| 1439 | break; |
| 1440 | |
| 1441 | default: |
| 1442 | break; |
| 1443 | } |
| 1444 | } |
| 1445 | |
| 1446 | if (isymbuf != NULL |
| 1447 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 1448 | { |
| 1449 | if (! link_info->keep_memory) |
| 1450 | free (isymbuf); |
| 1451 | else |
| 1452 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 1453 | } |
| 1454 | |
| 1455 | if (contents != NULL |
| 1456 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 1457 | { |
| 1458 | if (! link_info->keep_memory) |
| 1459 | free (contents); |
| 1460 | else |
| 1461 | { |
| 1462 | /* Cache the section contents for elf_link_input_bfd. */ |
| 1463 | elf_section_data (sec)->this_hdr.contents = contents; |
| 1464 | } |
| 1465 | } |
| 1466 | |
| 1467 | if (internal_relocs != NULL |
| 1468 | && elf_section_data (sec)->relocs != internal_relocs) |
| 1469 | free (internal_relocs); |
| 1470 | |
| 1471 | return TRUE; |
| 1472 | |
| 1473 | error_return: |
| 1474 | if (isymbuf != NULL |
| 1475 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 1476 | free (isymbuf); |
| 1477 | if (contents != NULL |
| 1478 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 1479 | free (contents); |
| 1480 | if (internal_relocs != NULL |
| 1481 | && elf_section_data (sec)->relocs != internal_relocs) |
| 1482 | free (internal_relocs); |
| 1483 | return FALSE; |
| 1484 | } |
| 1485 | |
| 1486 | /* Delete some bytes from a section while relaxing. */ |
| 1487 | |
| 1488 | static bfd_boolean |
| 1489 | elf32_h8_relax_delete_bytes (bfd *abfd, asection *sec, bfd_vma addr, int count) |
| 1490 | { |
| 1491 | Elf_Internal_Shdr *symtab_hdr; |
| 1492 | unsigned int sec_shndx; |
| 1493 | bfd_byte *contents; |
| 1494 | Elf_Internal_Rela *irel, *irelend; |
| 1495 | Elf_Internal_Sym *isym; |
| 1496 | Elf_Internal_Sym *isymend; |
| 1497 | bfd_vma toaddr; |
| 1498 | struct elf_link_hash_entry **sym_hashes; |
| 1499 | struct elf_link_hash_entry **end_hashes; |
| 1500 | unsigned int symcount; |
| 1501 | |
| 1502 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| 1503 | |
| 1504 | contents = elf_section_data (sec)->this_hdr.contents; |
| 1505 | |
| 1506 | toaddr = sec->size; |
| 1507 | |
| 1508 | irel = elf_section_data (sec)->relocs; |
| 1509 | irelend = irel + sec->reloc_count; |
| 1510 | |
| 1511 | /* Actually delete the bytes. */ |
| 1512 | memmove (contents + addr, contents + addr + count, |
| 1513 | (size_t) (toaddr - addr - count)); |
| 1514 | sec->size -= count; |
| 1515 | |
| 1516 | /* Adjust all the relocs. */ |
| 1517 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
| 1518 | { |
| 1519 | /* Get the new reloc address. */ |
| 1520 | if ((irel->r_offset > addr |
| 1521 | && irel->r_offset <= toaddr)) |
| 1522 | irel->r_offset -= count; |
| 1523 | } |
| 1524 | |
| 1525 | /* Adjust the local symbols defined in this section. */ |
| 1526 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1527 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1528 | isymend = isym + symtab_hdr->sh_info; |
| 1529 | for (; isym < isymend; isym++) |
| 1530 | { |
| 1531 | if (isym->st_shndx == sec_shndx |
| 1532 | && isym->st_value > addr |
| 1533 | && isym->st_value <= toaddr) |
| 1534 | isym->st_value -= count; |
| 1535 | } |
| 1536 | |
| 1537 | /* Now adjust the global symbols defined in this section. */ |
| 1538 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 1539 | - symtab_hdr->sh_info); |
| 1540 | sym_hashes = elf_sym_hashes (abfd); |
| 1541 | end_hashes = sym_hashes + symcount; |
| 1542 | for (; sym_hashes < end_hashes; sym_hashes++) |
| 1543 | { |
| 1544 | struct elf_link_hash_entry *sym_hash = *sym_hashes; |
| 1545 | |
| 1546 | if ((sym_hash->root.type == bfd_link_hash_defined |
| 1547 | || sym_hash->root.type == bfd_link_hash_defweak) |
| 1548 | && sym_hash->root.u.def.section == sec |
| 1549 | && sym_hash->root.u.def.value > addr |
| 1550 | && sym_hash->root.u.def.value <= toaddr) |
| 1551 | sym_hash->root.u.def.value -= count; |
| 1552 | } |
| 1553 | |
| 1554 | return TRUE; |
| 1555 | } |
| 1556 | |
| 1557 | /* Return TRUE if a symbol exists at the given address, else return |
| 1558 | FALSE. */ |
| 1559 | static bfd_boolean |
| 1560 | elf32_h8_symbol_address_p (bfd *abfd, asection *sec, bfd_vma addr) |
| 1561 | { |
| 1562 | Elf_Internal_Shdr *symtab_hdr; |
| 1563 | unsigned int sec_shndx; |
| 1564 | Elf_Internal_Sym *isym; |
| 1565 | Elf_Internal_Sym *isymend; |
| 1566 | struct elf_link_hash_entry **sym_hashes; |
| 1567 | struct elf_link_hash_entry **end_hashes; |
| 1568 | unsigned int symcount; |
| 1569 | |
| 1570 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| 1571 | |
| 1572 | /* Examine all the symbols. */ |
| 1573 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1574 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1575 | isymend = isym + symtab_hdr->sh_info; |
| 1576 | for (; isym < isymend; isym++) |
| 1577 | { |
| 1578 | if (isym->st_shndx == sec_shndx |
| 1579 | && isym->st_value == addr) |
| 1580 | return TRUE; |
| 1581 | } |
| 1582 | |
| 1583 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 1584 | - symtab_hdr->sh_info); |
| 1585 | sym_hashes = elf_sym_hashes (abfd); |
| 1586 | end_hashes = sym_hashes + symcount; |
| 1587 | for (; sym_hashes < end_hashes; sym_hashes++) |
| 1588 | { |
| 1589 | struct elf_link_hash_entry *sym_hash = *sym_hashes; |
| 1590 | if ((sym_hash->root.type == bfd_link_hash_defined |
| 1591 | || sym_hash->root.type == bfd_link_hash_defweak) |
| 1592 | && sym_hash->root.u.def.section == sec |
| 1593 | && sym_hash->root.u.def.value == addr) |
| 1594 | return TRUE; |
| 1595 | } |
| 1596 | |
| 1597 | return FALSE; |
| 1598 | } |
| 1599 | |
| 1600 | /* This is a version of bfd_generic_get_relocated_section_contents |
| 1601 | which uses elf32_h8_relocate_section. */ |
| 1602 | |
| 1603 | static bfd_byte * |
| 1604 | elf32_h8_get_relocated_section_contents (bfd *output_bfd, |
| 1605 | struct bfd_link_info *link_info, |
| 1606 | struct bfd_link_order *link_order, |
| 1607 | bfd_byte *data, |
| 1608 | bfd_boolean relocatable, |
| 1609 | asymbol **symbols) |
| 1610 | { |
| 1611 | Elf_Internal_Shdr *symtab_hdr; |
| 1612 | asection *input_section = link_order->u.indirect.section; |
| 1613 | bfd *input_bfd = input_section->owner; |
| 1614 | asection **sections = NULL; |
| 1615 | Elf_Internal_Rela *internal_relocs = NULL; |
| 1616 | Elf_Internal_Sym *isymbuf = NULL; |
| 1617 | |
| 1618 | /* We only need to handle the case of relaxing, or of having a |
| 1619 | particular set of section contents, specially. */ |
| 1620 | if (relocatable |
| 1621 | || elf_section_data (input_section)->this_hdr.contents == NULL) |
| 1622 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, |
| 1623 | link_order, data, |
| 1624 | relocatable, |
| 1625 | symbols); |
| 1626 | |
| 1627 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 1628 | |
| 1629 | memcpy (data, elf_section_data (input_section)->this_hdr.contents, |
| 1630 | (size_t) input_section->size); |
| 1631 | |
| 1632 | if ((input_section->flags & SEC_RELOC) != 0 |
| 1633 | && input_section->reloc_count > 0) |
| 1634 | { |
| 1635 | asection **secpp; |
| 1636 | Elf_Internal_Sym *isym, *isymend; |
| 1637 | bfd_size_type amt; |
| 1638 | |
| 1639 | internal_relocs = (_bfd_elf_link_read_relocs |
| 1640 | (input_bfd, input_section, NULL, |
| 1641 | (Elf_Internal_Rela *) NULL, FALSE)); |
| 1642 | if (internal_relocs == NULL) |
| 1643 | goto error_return; |
| 1644 | |
| 1645 | if (symtab_hdr->sh_info != 0) |
| 1646 | { |
| 1647 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1648 | if (isymbuf == NULL) |
| 1649 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| 1650 | symtab_hdr->sh_info, 0, |
| 1651 | NULL, NULL, NULL); |
| 1652 | if (isymbuf == NULL) |
| 1653 | goto error_return; |
| 1654 | } |
| 1655 | |
| 1656 | amt = symtab_hdr->sh_info; |
| 1657 | amt *= sizeof (asection *); |
| 1658 | sections = (asection **) bfd_malloc (amt); |
| 1659 | if (sections == NULL && amt != 0) |
| 1660 | goto error_return; |
| 1661 | |
| 1662 | isymend = isymbuf + symtab_hdr->sh_info; |
| 1663 | for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp) |
| 1664 | { |
| 1665 | asection *isec; |
| 1666 | |
| 1667 | if (isym->st_shndx == SHN_UNDEF) |
| 1668 | isec = bfd_und_section_ptr; |
| 1669 | else if (isym->st_shndx == SHN_ABS) |
| 1670 | isec = bfd_abs_section_ptr; |
| 1671 | else if (isym->st_shndx == SHN_COMMON) |
| 1672 | isec = bfd_com_section_ptr; |
| 1673 | else |
| 1674 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
| 1675 | |
| 1676 | *secpp = isec; |
| 1677 | } |
| 1678 | |
| 1679 | if (! elf32_h8_relocate_section (output_bfd, link_info, input_bfd, |
| 1680 | input_section, data, internal_relocs, |
| 1681 | isymbuf, sections)) |
| 1682 | goto error_return; |
| 1683 | |
| 1684 | if (sections != NULL) |
| 1685 | free (sections); |
| 1686 | if (isymbuf != NULL |
| 1687 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 1688 | free (isymbuf); |
| 1689 | if (elf_section_data (input_section)->relocs != internal_relocs) |
| 1690 | free (internal_relocs); |
| 1691 | } |
| 1692 | |
| 1693 | return data; |
| 1694 | |
| 1695 | error_return: |
| 1696 | if (sections != NULL) |
| 1697 | free (sections); |
| 1698 | if (isymbuf != NULL |
| 1699 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 1700 | free (isymbuf); |
| 1701 | if (internal_relocs != NULL |
| 1702 | && elf_section_data (input_section)->relocs != internal_relocs) |
| 1703 | free (internal_relocs); |
| 1704 | return NULL; |
| 1705 | } |
| 1706 | |
| 1707 | |
| 1708 | #define TARGET_BIG_SYM h8300_elf32_vec |
| 1709 | #define TARGET_BIG_NAME "elf32-h8300" |
| 1710 | #define ELF_ARCH bfd_arch_h8300 |
| 1711 | #define ELF_MACHINE_CODE EM_H8_300 |
| 1712 | #define ELF_MAXPAGESIZE 0x1 |
| 1713 | #define bfd_elf32_bfd_reloc_type_lookup elf32_h8_reloc_type_lookup |
| 1714 | #define bfd_elf32_bfd_reloc_name_lookup elf32_h8_reloc_name_lookup |
| 1715 | #define elf_info_to_howto elf32_h8_info_to_howto |
| 1716 | #define elf_info_to_howto_rel elf32_h8_info_to_howto_rel |
| 1717 | |
| 1718 | /* So we can set/examine bits in e_flags to get the specific |
| 1719 | H8 architecture in use. */ |
| 1720 | #define elf_backend_final_write_processing \ |
| 1721 | elf32_h8_final_write_processing |
| 1722 | #define elf_backend_object_p \ |
| 1723 | elf32_h8_object_p |
| 1724 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
| 1725 | elf32_h8_merge_private_bfd_data |
| 1726 | |
| 1727 | /* ??? when elf_backend_relocate_section is not defined, elf32-target.h |
| 1728 | defaults to using _bfd_generic_link_hash_table_create, but |
| 1729 | bfd_elf_size_dynamic_sections uses |
| 1730 | dynobj = elf_hash_table (info)->dynobj; |
| 1731 | and thus requires an elf hash table. */ |
| 1732 | #define bfd_elf32_bfd_link_hash_table_create _bfd_elf_link_hash_table_create |
| 1733 | |
| 1734 | /* Use an H8 specific linker, not the ELF generic linker. */ |
| 1735 | #define elf_backend_relocate_section elf32_h8_relocate_section |
| 1736 | #define elf_backend_rela_normal 1 |
| 1737 | #define elf_backend_can_gc_sections 1 |
| 1738 | |
| 1739 | /* And relaxing stuff. */ |
| 1740 | #define bfd_elf32_bfd_relax_section elf32_h8_relax_section |
| 1741 | #define bfd_elf32_bfd_get_relocated_section_contents \ |
| 1742 | elf32_h8_get_relocated_section_contents |
| 1743 | |
| 1744 | #define elf_symbol_leading_char '_' |
| 1745 | |
| 1746 | #include "elf32-target.h" |
| 1747 | |
| 1748 | #undef TARGET_BIG_SYM |
| 1749 | #define TARGET_BIG_SYM h8300_elf32_linux_vec |
| 1750 | #undef TARGET_BIG_NAME |
| 1751 | #define TARGET_BIG_NAME "elf32-h8300-linux" |
| 1752 | #undef elf_symbol_leading_char |
| 1753 | #define elf32_bed elf32_h8300_linux_bed |
| 1754 | |
| 1755 | #include "elf32-target.h" |