| 1 | /* Disassemble SH64 instructions. |
| 2 | Copyright (C) 2000, 2001 Free Software Foundation, Inc. |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License as published by |
| 6 | the Free Software Foundation; either version 2 of the License, or |
| 7 | (at your option) any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program; if not, write to the Free Software |
| 16 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 17 | |
| 18 | #include <stdio.h> |
| 19 | |
| 20 | #include "dis-asm.h" |
| 21 | #include "sysdep.h" |
| 22 | #include "sh64-opc.h" |
| 23 | #include "libiberty.h" |
| 24 | |
| 25 | /* We need to refer to the ELF header structure. */ |
| 26 | #include "elf-bfd.h" |
| 27 | #include "elf/sh.h" |
| 28 | |
| 29 | #define ELF_MODE32_CODE_LABEL_P(SYM) \ |
| 30 | (((elf_symbol_type *) (SYM))->internal_elf_sym.st_other & STO_SH5_ISA32) |
| 31 | |
| 32 | #define SAVED_MOVI_R(INFO) \ |
| 33 | (((struct sh64_disassemble_info *) ((INFO)->private_data))->address_reg) |
| 34 | |
| 35 | #define SAVED_MOVI_IMM(INFO) \ |
| 36 | (((struct sh64_disassemble_info *) ((INFO)->private_data))->built_address) |
| 37 | |
| 38 | struct sh64_disassemble_info |
| 39 | { |
| 40 | /* When we see a MOVI, we save the register and the value, and merge a |
| 41 | subsequent SHORI and display the address, if there is one. */ |
| 42 | unsigned int address_reg; |
| 43 | bfd_signed_vma built_address; |
| 44 | |
| 45 | /* This is the range decriptor for the current address. It is kept |
| 46 | around for the next call. */ |
| 47 | sh64_elf_crange crange; |
| 48 | }; |
| 49 | |
| 50 | /* Each item in the table is a mask to indicate which bits to be set |
| 51 | to determine an instruction's operator. |
| 52 | The index is as same as the instruction in the opcode table. |
| 53 | Note that some archs have this as a field in the opcode table. */ |
| 54 | static unsigned long *shmedia_opcode_mask_table; |
| 55 | |
| 56 | static void initialize_shmedia_opcode_mask_table PARAMS ((void)); |
| 57 | static int print_insn_shmedia PARAMS ((bfd_vma, disassemble_info *)); |
| 58 | static const char *creg_name PARAMS ((int)); |
| 59 | static boolean init_sh64_disasm_info PARAMS ((struct disassemble_info *)); |
| 60 | static enum sh64_elf_cr_type sh64_get_contents_type_disasm |
| 61 | PARAMS ((bfd_vma, struct disassemble_info *)); |
| 62 | |
| 63 | /* Initialize the SH64 opcode mask table for each instruction in SHmedia |
| 64 | mode. */ |
| 65 | |
| 66 | static void |
| 67 | initialize_shmedia_opcode_mask_table () |
| 68 | { |
| 69 | int n_opc; |
| 70 | int n; |
| 71 | |
| 72 | /* Calculate number of opcodes. */ |
| 73 | for (n_opc = 0; shmedia_table[n_opc].name != NULL; n_opc++) |
| 74 | ; |
| 75 | |
| 76 | shmedia_opcode_mask_table |
| 77 | = xmalloc (sizeof (shmedia_opcode_mask_table[0]) * n_opc); |
| 78 | |
| 79 | for (n = 0; n < n_opc; n++) |
| 80 | { |
| 81 | int i; |
| 82 | |
| 83 | unsigned long mask = 0; |
| 84 | |
| 85 | for (i = 0; shmedia_table[n].arg[i] != A_NONE; i++) |
| 86 | { |
| 87 | int offset = shmedia_table[n].nibbles[i]; |
| 88 | int length; |
| 89 | |
| 90 | switch (shmedia_table[n].arg[i]) |
| 91 | { |
| 92 | case A_GREG_M: |
| 93 | case A_GREG_N: |
| 94 | case A_GREG_D: |
| 95 | case A_CREG_K: |
| 96 | case A_CREG_J: |
| 97 | case A_FREG_G: |
| 98 | case A_FREG_H: |
| 99 | case A_FREG_F: |
| 100 | case A_DREG_G: |
| 101 | case A_DREG_H: |
| 102 | case A_DREG_F: |
| 103 | case A_FMREG_G: |
| 104 | case A_FMREG_H: |
| 105 | case A_FMREG_F: |
| 106 | case A_FPREG_G: |
| 107 | case A_FPREG_H: |
| 108 | case A_FPREG_F: |
| 109 | case A_FVREG_G: |
| 110 | case A_FVREG_H: |
| 111 | case A_FVREG_F: |
| 112 | case A_REUSE_PREV: |
| 113 | length = 6; |
| 114 | break; |
| 115 | |
| 116 | case A_TREG_A: |
| 117 | case A_TREG_B: |
| 118 | length = 3; |
| 119 | break; |
| 120 | |
| 121 | case A_IMMM: |
| 122 | abort (); |
| 123 | break; |
| 124 | |
| 125 | case A_IMMU5: |
| 126 | length = 5; |
| 127 | break; |
| 128 | |
| 129 | case A_IMMS6: |
| 130 | case A_IMMU6: |
| 131 | case A_IMMS6BY32: |
| 132 | length = 6; |
| 133 | break; |
| 134 | |
| 135 | case A_IMMS10: |
| 136 | case A_IMMS10BY1: |
| 137 | case A_IMMS10BY2: |
| 138 | case A_IMMS10BY4: |
| 139 | case A_IMMS10BY8: |
| 140 | length = 10; |
| 141 | break; |
| 142 | |
| 143 | case A_IMMU16: |
| 144 | case A_IMMS16: |
| 145 | case A_PCIMMS16BY4: |
| 146 | case A_PCIMMS16BY4_PT: |
| 147 | length = 16; |
| 148 | break; |
| 149 | |
| 150 | default: |
| 151 | abort (); |
| 152 | length = 0; |
| 153 | break; |
| 154 | } |
| 155 | |
| 156 | if (length != 0) |
| 157 | mask |= (0xffffffff >> (32 - length)) << offset; |
| 158 | } |
| 159 | shmedia_opcode_mask_table[n] = 0xffffffff & ~mask; |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | /* Get a predefined control-register-name, or return NULL. */ |
| 164 | |
| 165 | const char * |
| 166 | creg_name (cregno) |
| 167 | int cregno; |
| 168 | { |
| 169 | const shmedia_creg_info *cregp; |
| 170 | |
| 171 | /* If control register usage is common enough, change this to search a |
| 172 | hash-table. */ |
| 173 | for (cregp = shmedia_creg_table; cregp->name != NULL; cregp++) |
| 174 | { |
| 175 | if (cregp->cregno == cregno) |
| 176 | return cregp->name; |
| 177 | } |
| 178 | |
| 179 | return NULL; |
| 180 | } |
| 181 | |
| 182 | /* Main function to disassemble SHmedia instructions. */ |
| 183 | |
| 184 | static int |
| 185 | print_insn_shmedia (memaddr, info) |
| 186 | bfd_vma memaddr; |
| 187 | struct disassemble_info *info; |
| 188 | { |
| 189 | fprintf_ftype fprintf_fn = info->fprintf_func; |
| 190 | void *stream = info->stream; |
| 191 | |
| 192 | unsigned char insn[4]; |
| 193 | unsigned long instruction; |
| 194 | int status; |
| 195 | int n; |
| 196 | const shmedia_opcode_info *op; |
| 197 | int i; |
| 198 | unsigned int r = 0; |
| 199 | long imm = 0; |
| 200 | bfd_vma disp_pc_addr; |
| 201 | |
| 202 | status = info->read_memory_func (memaddr, insn, 4, info); |
| 203 | |
| 204 | /* If we can't read four bytes, something is wrong. Display any data we |
| 205 | can get as .byte:s. */ |
| 206 | if (status != 0) |
| 207 | { |
| 208 | int i; |
| 209 | |
| 210 | for (i = 0; i < 3; i++) |
| 211 | { |
| 212 | status = info->read_memory_func (memaddr + i, insn, 1, info); |
| 213 | if (status != 0) |
| 214 | break; |
| 215 | (*fprintf_fn) (stream, "%s0x%02x", |
| 216 | i == 0 ? ".byte " : ", ", |
| 217 | insn[0]); |
| 218 | } |
| 219 | |
| 220 | return i ? i : -1; |
| 221 | } |
| 222 | |
| 223 | /* Rearrange the bytes to make up an instruction. */ |
| 224 | if (info->endian == BFD_ENDIAN_LITTLE) |
| 225 | instruction = bfd_getl32 (insn); |
| 226 | else |
| 227 | instruction = bfd_getb32 (insn); |
| 228 | |
| 229 | /* FIXME: Searching could be implemented using a hash on relevant |
| 230 | fields. */ |
| 231 | for (n = 0, op = shmedia_table; |
| 232 | op->name != NULL |
| 233 | && ((instruction & shmedia_opcode_mask_table[n]) != op->opcode_base); |
| 234 | n++, op++) |
| 235 | ; |
| 236 | |
| 237 | /* FIXME: We should also check register number constraints. */ |
| 238 | if (op->name == NULL) |
| 239 | { |
| 240 | fprintf_fn (stream, ".long 0x%08x", instruction); |
| 241 | return 4; |
| 242 | } |
| 243 | |
| 244 | fprintf_fn (stream, "%s\t", op->name); |
| 245 | |
| 246 | for (i = 0; i < 3 && op->arg[i] != A_NONE; i++) |
| 247 | { |
| 248 | unsigned long temp = instruction >> op->nibbles[i]; |
| 249 | int by_number = 0; |
| 250 | |
| 251 | if (i > 0 && op->arg[i] != A_REUSE_PREV) |
| 252 | fprintf_fn (stream, ","); |
| 253 | |
| 254 | switch (op->arg[i]) |
| 255 | { |
| 256 | case A_REUSE_PREV: |
| 257 | continue; |
| 258 | |
| 259 | case A_GREG_M: |
| 260 | case A_GREG_N: |
| 261 | case A_GREG_D: |
| 262 | r = temp & 0x3f; |
| 263 | fprintf_fn (stream, "r%d", r); |
| 264 | break; |
| 265 | |
| 266 | case A_FVREG_F: |
| 267 | case A_FVREG_G: |
| 268 | case A_FVREG_H: |
| 269 | r = temp & 0x3f; |
| 270 | fprintf_fn (stream, "fv%d", r); |
| 271 | break; |
| 272 | |
| 273 | case A_FPREG_F: |
| 274 | case A_FPREG_G: |
| 275 | case A_FPREG_H: |
| 276 | r = temp & 0x3f; |
| 277 | fprintf_fn (stream, "fp%d", r); |
| 278 | break; |
| 279 | |
| 280 | case A_FMREG_F: |
| 281 | case A_FMREG_G: |
| 282 | case A_FMREG_H: |
| 283 | r = temp & 0x3f; |
| 284 | fprintf_fn (stream, "mtrx%d", r); |
| 285 | break; |
| 286 | |
| 287 | case A_CREG_K: |
| 288 | case A_CREG_J: |
| 289 | { |
| 290 | const char *name; |
| 291 | r = temp & 0x3f; |
| 292 | |
| 293 | name = creg_name (r); |
| 294 | |
| 295 | if (name != NULL) |
| 296 | fprintf_fn (stream, "%s", name); |
| 297 | else |
| 298 | fprintf_fn (stream, "cr%d", r); |
| 299 | } |
| 300 | break; |
| 301 | |
| 302 | case A_FREG_G: |
| 303 | case A_FREG_H: |
| 304 | case A_FREG_F: |
| 305 | r = temp & 0x3f; |
| 306 | fprintf_fn (stream, "fr%d", r); |
| 307 | break; |
| 308 | |
| 309 | case A_DREG_G: |
| 310 | case A_DREG_H: |
| 311 | case A_DREG_F: |
| 312 | r = temp & 0x3f; |
| 313 | fprintf_fn (stream, "dr%d", r); |
| 314 | break; |
| 315 | |
| 316 | case A_TREG_A: |
| 317 | case A_TREG_B: |
| 318 | r = temp & 0x7; |
| 319 | fprintf_fn (stream, "tr%d", r); |
| 320 | break; |
| 321 | |
| 322 | /* A signed 6-bit number. */ |
| 323 | case A_IMMS6: |
| 324 | imm = temp & 0x3f; |
| 325 | if (imm & (unsigned long) 0x20) |
| 326 | imm |= ~(unsigned long) 0x3f; |
| 327 | fprintf_fn (stream, "%d", imm); |
| 328 | break; |
| 329 | |
| 330 | /* A signed 6-bit number, multiplied by 32 when used. */ |
| 331 | case A_IMMS6BY32: |
| 332 | imm = temp & 0x3f; |
| 333 | if (imm & (unsigned long) 0x20) |
| 334 | imm |= ~(unsigned long) 0x3f; |
| 335 | fprintf_fn (stream, "%d", imm * 32); |
| 336 | break; |
| 337 | |
| 338 | /* A signed 10-bit number, multiplied by 8 when used. */ |
| 339 | case A_IMMS10BY8: |
| 340 | by_number++; |
| 341 | /* Fall through. */ |
| 342 | |
| 343 | /* A signed 10-bit number, multiplied by 4 when used. */ |
| 344 | case A_IMMS10BY4: |
| 345 | by_number++; |
| 346 | /* Fall through. */ |
| 347 | |
| 348 | /* A signed 10-bit number, multiplied by 2 when used. */ |
| 349 | case A_IMMS10BY2: |
| 350 | by_number++; |
| 351 | /* Fall through. */ |
| 352 | |
| 353 | /* A signed 10-bit number. */ |
| 354 | case A_IMMS10: |
| 355 | case A_IMMS10BY1: |
| 356 | imm = temp & 0x3ff; |
| 357 | if (imm & (unsigned long) 0x200) |
| 358 | imm |= ~(unsigned long) 0x3ff; |
| 359 | imm <<= by_number; |
| 360 | fprintf_fn (stream, "%d", imm); |
| 361 | break; |
| 362 | |
| 363 | /* A signed 16-bit number. */ |
| 364 | case A_IMMS16: |
| 365 | imm = temp & 0xffff; |
| 366 | if (imm & (unsigned long) 0x8000) |
| 367 | imm |= ~((unsigned long) 0xffff); |
| 368 | fprintf_fn (stream, "%d", imm); |
| 369 | break; |
| 370 | |
| 371 | /* A PC-relative signed 16-bit number, multiplied by 4 when |
| 372 | used. */ |
| 373 | case A_PCIMMS16BY4: |
| 374 | imm = temp & 0xffff; /* 16 bits */ |
| 375 | if (imm & (unsigned long) 0x8000) |
| 376 | imm |= ~(unsigned long) 0xffff; |
| 377 | imm <<= 2; |
| 378 | disp_pc_addr = (bfd_vma) imm + memaddr; |
| 379 | (*info->print_address_func) (disp_pc_addr, info); |
| 380 | break; |
| 381 | |
| 382 | /* An unsigned 5-bit number. */ |
| 383 | case A_IMMU5: |
| 384 | imm = temp & 0x1f; |
| 385 | fprintf_fn (stream, "%d", imm); |
| 386 | break; |
| 387 | |
| 388 | /* An unsigned 6-bit number. */ |
| 389 | case A_IMMU6: |
| 390 | imm = temp & 0x3f; |
| 391 | fprintf_fn (stream, "%d", imm); |
| 392 | break; |
| 393 | |
| 394 | /* An unsigned 16-bit number. */ |
| 395 | case A_IMMU16: |
| 396 | imm = temp & 0xffff; |
| 397 | fprintf_fn (stream, "%d", imm); |
| 398 | break; |
| 399 | |
| 400 | default: |
| 401 | abort (); |
| 402 | break; |
| 403 | } |
| 404 | } |
| 405 | |
| 406 | /* FIXME: Looks like 32-bit values only are handled. |
| 407 | FIXME: PC-relative numbers aren't handled correctly. */ |
| 408 | if (op->opcode_base == (unsigned long) SHMEDIA_SHORI_OPC |
| 409 | && SAVED_MOVI_R (info) == r) |
| 410 | { |
| 411 | asection *section = info->section; |
| 412 | |
| 413 | /* Most callers do not set the section field correctly yet. Revert |
| 414 | to getting the section from symbols, if any. */ |
| 415 | if (section == NULL |
| 416 | && info->symbols != NULL |
| 417 | && bfd_asymbol_flavour (info->symbols[0]) == bfd_target_elf_flavour |
| 418 | && ! bfd_is_und_section (bfd_get_section (info->symbols[0])) |
| 419 | && ! bfd_is_abs_section (bfd_get_section (info->symbols[0]))) |
| 420 | section = bfd_get_section (info->symbols[0]); |
| 421 | |
| 422 | /* Only guess addresses when the contents of this section is fully |
| 423 | relocated. Otherwise, the value will be zero or perhaps even |
| 424 | bogus. */ |
| 425 | if (section == NULL |
| 426 | || section->owner == NULL |
| 427 | || elf_elfheader (section->owner)->e_type == ET_EXEC) |
| 428 | { |
| 429 | bfd_signed_vma shori_addr; |
| 430 | |
| 431 | shori_addr = SAVED_MOVI_IMM (info) << 16; |
| 432 | shori_addr |= imm; |
| 433 | |
| 434 | fprintf_fn (stream, "\t! 0x"); |
| 435 | (*info->print_address_func) (shori_addr, info); |
| 436 | } |
| 437 | } |
| 438 | |
| 439 | if (op->opcode_base == SHMEDIA_MOVI_OPC) |
| 440 | { |
| 441 | SAVED_MOVI_IMM (info) = imm; |
| 442 | SAVED_MOVI_R (info) = r; |
| 443 | } |
| 444 | else |
| 445 | { |
| 446 | SAVED_MOVI_IMM (info) = 0; |
| 447 | SAVED_MOVI_R (info) = 255; |
| 448 | } |
| 449 | |
| 450 | return 4; |
| 451 | } |
| 452 | |
| 453 | /* Check the type of contents about to be disassembled. This is like |
| 454 | sh64_get_contents_type (which may be called from here), except that it |
| 455 | takes the same arguments as print_insn_* and does what can be done if |
| 456 | no section is available. */ |
| 457 | |
| 458 | static enum sh64_elf_cr_type |
| 459 | sh64_get_contents_type_disasm (memaddr, info) |
| 460 | bfd_vma memaddr; |
| 461 | struct disassemble_info *info; |
| 462 | { |
| 463 | struct sh64_disassemble_info *sh64_infop = info->private_data; |
| 464 | |
| 465 | /* Perhaps we have a region from a previous probe and it still counts |
| 466 | for this address? */ |
| 467 | if (sh64_infop->crange.cr_type != CRT_NONE |
| 468 | && memaddr >= sh64_infop->crange.cr_addr |
| 469 | && memaddr < sh64_infop->crange.cr_addr + sh64_infop->crange.cr_size) |
| 470 | return sh64_infop->crange.cr_type; |
| 471 | |
| 472 | /* If we have a section, try and use it. */ |
| 473 | if (info->section |
| 474 | && bfd_get_flavour (info->section->owner) == bfd_target_elf_flavour) |
| 475 | { |
| 476 | enum sh64_elf_cr_type cr_type |
| 477 | = sh64_get_contents_type (info->section, memaddr, |
| 478 | &sh64_infop->crange); |
| 479 | |
| 480 | if (cr_type != CRT_NONE) |
| 481 | return cr_type; |
| 482 | } |
| 483 | |
| 484 | /* If we have symbols, we can try and get at a section from *that*. */ |
| 485 | if (info->symbols != NULL |
| 486 | && bfd_asymbol_flavour (info->symbols[0]) == bfd_target_elf_flavour |
| 487 | && ! bfd_is_und_section (bfd_get_section (info->symbols[0])) |
| 488 | && ! bfd_is_abs_section (bfd_get_section (info->symbols[0]))) |
| 489 | { |
| 490 | enum sh64_elf_cr_type cr_type |
| 491 | = sh64_get_contents_type (bfd_get_section (info->symbols[0]), |
| 492 | memaddr, &sh64_infop->crange); |
| 493 | |
| 494 | if (cr_type != CRT_NONE) |
| 495 | return cr_type; |
| 496 | } |
| 497 | |
| 498 | /* We can make a reasonable guess based on the st_other field of a |
| 499 | symbol; for a BranchTarget this is marked as STO_SH5_ISA32 and then |
| 500 | it's most probably code there. */ |
| 501 | if (info->symbols |
| 502 | && bfd_asymbol_flavour (info->symbols[0]) == bfd_target_elf_flavour |
| 503 | && elf_symbol_from (bfd_asymbol_bfd (info->symbols[0]), |
| 504 | info->symbols[0])->internal_elf_sym.st_other |
| 505 | == STO_SH5_ISA32) |
| 506 | return CRT_SH5_ISA32; |
| 507 | |
| 508 | /* If all else fails, guess this is code and guess on the low bit set. */ |
| 509 | return (memaddr & 1) == 1 ? CRT_SH5_ISA32 : CRT_SH5_ISA16; |
| 510 | } |
| 511 | |
| 512 | /* Initialize static and dynamic disassembly state. */ |
| 513 | |
| 514 | static boolean |
| 515 | init_sh64_disasm_info (info) |
| 516 | struct disassemble_info *info; |
| 517 | { |
| 518 | struct sh64_disassemble_info *sh64_infop |
| 519 | = calloc (sizeof (*sh64_infop), 1); |
| 520 | |
| 521 | if (sh64_infop == NULL) |
| 522 | return false; |
| 523 | |
| 524 | info->private_data = sh64_infop; |
| 525 | |
| 526 | SAVED_MOVI_IMM (info) = 0; |
| 527 | SAVED_MOVI_R (info) = 255; |
| 528 | |
| 529 | if (shmedia_opcode_mask_table == NULL) |
| 530 | initialize_shmedia_opcode_mask_table (); |
| 531 | |
| 532 | return true; |
| 533 | } |
| 534 | |
| 535 | /* Main entry to disassemble SHmedia instructions, given an endian set in |
| 536 | INFO. Note that the simulator uses this as the main entry and does not |
| 537 | use any of the functions further below. */ |
| 538 | |
| 539 | int |
| 540 | print_insn_sh64x_media (memaddr, info) |
| 541 | bfd_vma memaddr; |
| 542 | struct disassemble_info *info; |
| 543 | { |
| 544 | if (info->private_data == NULL && ! init_sh64_disasm_info (info)) |
| 545 | return -1; |
| 546 | |
| 547 | /* Make reasonable output. */ |
| 548 | info->bytes_per_line = 4; |
| 549 | info->bytes_per_chunk = 4; |
| 550 | |
| 551 | return print_insn_shmedia (memaddr, info); |
| 552 | } |
| 553 | |
| 554 | /* Main entry to disassemble SHmedia insns. |
| 555 | If we see an SHcompact instruction, return -2. */ |
| 556 | |
| 557 | int |
| 558 | print_insn_sh64 (memaddr, info) |
| 559 | bfd_vma memaddr; |
| 560 | struct disassemble_info *info; |
| 561 | { |
| 562 | enum bfd_endian endian = info->endian; |
| 563 | enum sh64_elf_cr_type cr_type; |
| 564 | |
| 565 | if (info->private_data == NULL && ! init_sh64_disasm_info (info)) |
| 566 | return -1; |
| 567 | |
| 568 | cr_type = sh64_get_contents_type_disasm (memaddr, info); |
| 569 | if (cr_type != CRT_SH5_ISA16) |
| 570 | { |
| 571 | int length = 4 - (memaddr % 4); |
| 572 | info->display_endian = endian; |
| 573 | |
| 574 | /* If we got an uneven address to indicate SHmedia, adjust it. */ |
| 575 | if (cr_type == CRT_SH5_ISA32 && length == 3) |
| 576 | memaddr--, length = 4; |
| 577 | |
| 578 | /* Only disassemble on four-byte boundaries. Addresses that are not |
| 579 | a multiple of four can happen after a data region. */ |
| 580 | if (cr_type == CRT_SH5_ISA32 && length == 4) |
| 581 | return print_insn_sh64x_media (memaddr, info); |
| 582 | |
| 583 | /* We get CRT_DATA *only* for data regions in a mixed-contents |
| 584 | section. For sections with data only, we get indication of one |
| 585 | of the ISA:s. You may think that we shouldn't disassemble |
| 586 | section with only data if we can figure that out. However, the |
| 587 | disassembly function is by default not called for data-only |
| 588 | sections, so if the user explicitly specified disassembly of a |
| 589 | data section, that's what we should do. */ |
| 590 | if (cr_type == CRT_DATA || length != 4) |
| 591 | { |
| 592 | int status; |
| 593 | unsigned char data[4]; |
| 594 | struct sh64_disassemble_info *sh64_infop = info->private_data; |
| 595 | |
| 596 | if (length == 4 |
| 597 | && sh64_infop->crange.cr_type != CRT_NONE |
| 598 | && memaddr >= sh64_infop->crange.cr_addr |
| 599 | && memaddr < (sh64_infop->crange.cr_addr |
| 600 | + sh64_infop->crange.cr_size)) |
| 601 | length |
| 602 | = (sh64_infop->crange.cr_addr |
| 603 | + sh64_infop->crange.cr_size - memaddr); |
| 604 | |
| 605 | status |
| 606 | = (*info->read_memory_func) (memaddr, data, |
| 607 | length >= 4 ? 4 : length, info); |
| 608 | |
| 609 | if (status == 0 && length >= 4) |
| 610 | { |
| 611 | (*info->fprintf_func) (info->stream, ".long 0x%08lx", |
| 612 | endian == BFD_ENDIAN_BIG |
| 613 | ? (long) (bfd_getb32 (data)) |
| 614 | : (long) (bfd_getl32 (data))); |
| 615 | return 4; |
| 616 | } |
| 617 | else |
| 618 | { |
| 619 | int i; |
| 620 | |
| 621 | for (i = 0; i < length; i++) |
| 622 | { |
| 623 | status = info->read_memory_func (memaddr + i, data, 1, info); |
| 624 | if (status != 0) |
| 625 | break; |
| 626 | (*info->fprintf_func) (info->stream, "%s0x%02x", |
| 627 | i == 0 ? ".byte " : ", ", |
| 628 | data[0]); |
| 629 | } |
| 630 | |
| 631 | return i ? i : -1; |
| 632 | } |
| 633 | } |
| 634 | } |
| 635 | |
| 636 | /* SH1 .. SH4 instruction, let caller handle it. */ |
| 637 | return -2; |
| 638 | } |