| 1 | /* Intel 386 target-dependent stuff. |
| 2 | |
| 3 | Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
| 4 | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
| 5 | Free Software Foundation, Inc. |
| 6 | |
| 7 | This file is part of GDB. |
| 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "opcode/i386.h" |
| 24 | #include "arch-utils.h" |
| 25 | #include "command.h" |
| 26 | #include "dummy-frame.h" |
| 27 | #include "dwarf2-frame.h" |
| 28 | #include "doublest.h" |
| 29 | #include "frame.h" |
| 30 | #include "frame-base.h" |
| 31 | #include "frame-unwind.h" |
| 32 | #include "inferior.h" |
| 33 | #include "gdbcmd.h" |
| 34 | #include "gdbcore.h" |
| 35 | #include "gdbtypes.h" |
| 36 | #include "objfiles.h" |
| 37 | #include "osabi.h" |
| 38 | #include "regcache.h" |
| 39 | #include "reggroups.h" |
| 40 | #include "regset.h" |
| 41 | #include "symfile.h" |
| 42 | #include "symtab.h" |
| 43 | #include "target.h" |
| 44 | #include "value.h" |
| 45 | #include "dis-asm.h" |
| 46 | |
| 47 | #include "gdb_assert.h" |
| 48 | #include "gdb_string.h" |
| 49 | |
| 50 | #include "i386-tdep.h" |
| 51 | #include "i387-tdep.h" |
| 52 | |
| 53 | #include "record.h" |
| 54 | #include <stdint.h> |
| 55 | |
| 56 | /* Register names. */ |
| 57 | |
| 58 | static char *i386_register_names[] = |
| 59 | { |
| 60 | "eax", "ecx", "edx", "ebx", |
| 61 | "esp", "ebp", "esi", "edi", |
| 62 | "eip", "eflags", "cs", "ss", |
| 63 | "ds", "es", "fs", "gs", |
| 64 | "st0", "st1", "st2", "st3", |
| 65 | "st4", "st5", "st6", "st7", |
| 66 | "fctrl", "fstat", "ftag", "fiseg", |
| 67 | "fioff", "foseg", "fooff", "fop", |
| 68 | "xmm0", "xmm1", "xmm2", "xmm3", |
| 69 | "xmm4", "xmm5", "xmm6", "xmm7", |
| 70 | "mxcsr" |
| 71 | }; |
| 72 | |
| 73 | static const int i386_num_register_names = ARRAY_SIZE (i386_register_names); |
| 74 | |
| 75 | /* Register names for MMX pseudo-registers. */ |
| 76 | |
| 77 | static char *i386_mmx_names[] = |
| 78 | { |
| 79 | "mm0", "mm1", "mm2", "mm3", |
| 80 | "mm4", "mm5", "mm6", "mm7" |
| 81 | }; |
| 82 | |
| 83 | static const int i386_num_mmx_regs = ARRAY_SIZE (i386_mmx_names); |
| 84 | |
| 85 | static int |
| 86 | i386_mmx_regnum_p (struct gdbarch *gdbarch, int regnum) |
| 87 | { |
| 88 | int mm0_regnum = gdbarch_tdep (gdbarch)->mm0_regnum; |
| 89 | |
| 90 | if (mm0_regnum < 0) |
| 91 | return 0; |
| 92 | |
| 93 | return (regnum >= mm0_regnum && regnum < mm0_regnum + i386_num_mmx_regs); |
| 94 | } |
| 95 | |
| 96 | /* SSE register? */ |
| 97 | |
| 98 | static int |
| 99 | i386_sse_regnum_p (struct gdbarch *gdbarch, int regnum) |
| 100 | { |
| 101 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 102 | |
| 103 | if (I387_NUM_XMM_REGS (tdep) == 0) |
| 104 | return 0; |
| 105 | |
| 106 | return (I387_XMM0_REGNUM (tdep) <= regnum |
| 107 | && regnum < I387_MXCSR_REGNUM (tdep)); |
| 108 | } |
| 109 | |
| 110 | static int |
| 111 | i386_mxcsr_regnum_p (struct gdbarch *gdbarch, int regnum) |
| 112 | { |
| 113 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 114 | |
| 115 | if (I387_NUM_XMM_REGS (tdep) == 0) |
| 116 | return 0; |
| 117 | |
| 118 | return (regnum == I387_MXCSR_REGNUM (tdep)); |
| 119 | } |
| 120 | |
| 121 | /* FP register? */ |
| 122 | |
| 123 | int |
| 124 | i386_fp_regnum_p (struct gdbarch *gdbarch, int regnum) |
| 125 | { |
| 126 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 127 | |
| 128 | if (I387_ST0_REGNUM (tdep) < 0) |
| 129 | return 0; |
| 130 | |
| 131 | return (I387_ST0_REGNUM (tdep) <= regnum |
| 132 | && regnum < I387_FCTRL_REGNUM (tdep)); |
| 133 | } |
| 134 | |
| 135 | int |
| 136 | i386_fpc_regnum_p (struct gdbarch *gdbarch, int regnum) |
| 137 | { |
| 138 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 139 | |
| 140 | if (I387_ST0_REGNUM (tdep) < 0) |
| 141 | return 0; |
| 142 | |
| 143 | return (I387_FCTRL_REGNUM (tdep) <= regnum |
| 144 | && regnum < I387_XMM0_REGNUM (tdep)); |
| 145 | } |
| 146 | |
| 147 | /* Return the name of register REGNUM. */ |
| 148 | |
| 149 | const char * |
| 150 | i386_register_name (struct gdbarch *gdbarch, int regnum) |
| 151 | { |
| 152 | if (i386_mmx_regnum_p (gdbarch, regnum)) |
| 153 | return i386_mmx_names[regnum - I387_MM0_REGNUM (gdbarch_tdep (gdbarch))]; |
| 154 | |
| 155 | if (regnum >= 0 && regnum < i386_num_register_names) |
| 156 | return i386_register_names[regnum]; |
| 157 | |
| 158 | return NULL; |
| 159 | } |
| 160 | |
| 161 | /* Convert a dbx register number REG to the appropriate register |
| 162 | number used by GDB. */ |
| 163 | |
| 164 | static int |
| 165 | i386_dbx_reg_to_regnum (struct gdbarch *gdbarch, int reg) |
| 166 | { |
| 167 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 168 | |
| 169 | /* This implements what GCC calls the "default" register map |
| 170 | (dbx_register_map[]). */ |
| 171 | |
| 172 | if (reg >= 0 && reg <= 7) |
| 173 | { |
| 174 | /* General-purpose registers. The debug info calls %ebp |
| 175 | register 4, and %esp register 5. */ |
| 176 | if (reg == 4) |
| 177 | return 5; |
| 178 | else if (reg == 5) |
| 179 | return 4; |
| 180 | else return reg; |
| 181 | } |
| 182 | else if (reg >= 12 && reg <= 19) |
| 183 | { |
| 184 | /* Floating-point registers. */ |
| 185 | return reg - 12 + I387_ST0_REGNUM (tdep); |
| 186 | } |
| 187 | else if (reg >= 21 && reg <= 28) |
| 188 | { |
| 189 | /* SSE registers. */ |
| 190 | return reg - 21 + I387_XMM0_REGNUM (tdep); |
| 191 | } |
| 192 | else if (reg >= 29 && reg <= 36) |
| 193 | { |
| 194 | /* MMX registers. */ |
| 195 | return reg - 29 + I387_MM0_REGNUM (tdep); |
| 196 | } |
| 197 | |
| 198 | /* This will hopefully provoke a warning. */ |
| 199 | return gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch); |
| 200 | } |
| 201 | |
| 202 | /* Convert SVR4 register number REG to the appropriate register number |
| 203 | used by GDB. */ |
| 204 | |
| 205 | static int |
| 206 | i386_svr4_reg_to_regnum (struct gdbarch *gdbarch, int reg) |
| 207 | { |
| 208 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 209 | |
| 210 | /* This implements the GCC register map that tries to be compatible |
| 211 | with the SVR4 C compiler for DWARF (svr4_dbx_register_map[]). */ |
| 212 | |
| 213 | /* The SVR4 register numbering includes %eip and %eflags, and |
| 214 | numbers the floating point registers differently. */ |
| 215 | if (reg >= 0 && reg <= 9) |
| 216 | { |
| 217 | /* General-purpose registers. */ |
| 218 | return reg; |
| 219 | } |
| 220 | else if (reg >= 11 && reg <= 18) |
| 221 | { |
| 222 | /* Floating-point registers. */ |
| 223 | return reg - 11 + I387_ST0_REGNUM (tdep); |
| 224 | } |
| 225 | else if (reg >= 21 && reg <= 36) |
| 226 | { |
| 227 | /* The SSE and MMX registers have the same numbers as with dbx. */ |
| 228 | return i386_dbx_reg_to_regnum (gdbarch, reg); |
| 229 | } |
| 230 | |
| 231 | switch (reg) |
| 232 | { |
| 233 | case 37: return I387_FCTRL_REGNUM (tdep); |
| 234 | case 38: return I387_FSTAT_REGNUM (tdep); |
| 235 | case 39: return I387_MXCSR_REGNUM (tdep); |
| 236 | case 40: return I386_ES_REGNUM; |
| 237 | case 41: return I386_CS_REGNUM; |
| 238 | case 42: return I386_SS_REGNUM; |
| 239 | case 43: return I386_DS_REGNUM; |
| 240 | case 44: return I386_FS_REGNUM; |
| 241 | case 45: return I386_GS_REGNUM; |
| 242 | } |
| 243 | |
| 244 | /* This will hopefully provoke a warning. */ |
| 245 | return gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch); |
| 246 | } |
| 247 | |
| 248 | \f |
| 249 | |
| 250 | /* This is the variable that is set with "set disassembly-flavor", and |
| 251 | its legitimate values. */ |
| 252 | static const char att_flavor[] = "att"; |
| 253 | static const char intel_flavor[] = "intel"; |
| 254 | static const char *valid_flavors[] = |
| 255 | { |
| 256 | att_flavor, |
| 257 | intel_flavor, |
| 258 | NULL |
| 259 | }; |
| 260 | static const char *disassembly_flavor = att_flavor; |
| 261 | \f |
| 262 | |
| 263 | /* Use the program counter to determine the contents and size of a |
| 264 | breakpoint instruction. Return a pointer to a string of bytes that |
| 265 | encode a breakpoint instruction, store the length of the string in |
| 266 | *LEN and optionally adjust *PC to point to the correct memory |
| 267 | location for inserting the breakpoint. |
| 268 | |
| 269 | On the i386 we have a single breakpoint that fits in a single byte |
| 270 | and can be inserted anywhere. |
| 271 | |
| 272 | This function is 64-bit safe. */ |
| 273 | |
| 274 | static const gdb_byte * |
| 275 | i386_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pc, int *len) |
| 276 | { |
| 277 | static gdb_byte break_insn[] = { 0xcc }; /* int 3 */ |
| 278 | |
| 279 | *len = sizeof (break_insn); |
| 280 | return break_insn; |
| 281 | } |
| 282 | \f |
| 283 | /* Displaced instruction handling. */ |
| 284 | |
| 285 | /* Skip the legacy instruction prefixes in INSN. |
| 286 | Not all prefixes are valid for any particular insn |
| 287 | but we needn't care, the insn will fault if it's invalid. |
| 288 | The result is a pointer to the first opcode byte, |
| 289 | or NULL if we run off the end of the buffer. */ |
| 290 | |
| 291 | static gdb_byte * |
| 292 | i386_skip_prefixes (gdb_byte *insn, size_t max_len) |
| 293 | { |
| 294 | gdb_byte *end = insn + max_len; |
| 295 | |
| 296 | while (insn < end) |
| 297 | { |
| 298 | switch (*insn) |
| 299 | { |
| 300 | case DATA_PREFIX_OPCODE: |
| 301 | case ADDR_PREFIX_OPCODE: |
| 302 | case CS_PREFIX_OPCODE: |
| 303 | case DS_PREFIX_OPCODE: |
| 304 | case ES_PREFIX_OPCODE: |
| 305 | case FS_PREFIX_OPCODE: |
| 306 | case GS_PREFIX_OPCODE: |
| 307 | case SS_PREFIX_OPCODE: |
| 308 | case LOCK_PREFIX_OPCODE: |
| 309 | case REPE_PREFIX_OPCODE: |
| 310 | case REPNE_PREFIX_OPCODE: |
| 311 | ++insn; |
| 312 | continue; |
| 313 | default: |
| 314 | return insn; |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | return NULL; |
| 319 | } |
| 320 | |
| 321 | static int |
| 322 | i386_absolute_jmp_p (const gdb_byte *insn) |
| 323 | { |
| 324 | /* jmp far (absolute address in operand) */ |
| 325 | if (insn[0] == 0xea) |
| 326 | return 1; |
| 327 | |
| 328 | if (insn[0] == 0xff) |
| 329 | { |
| 330 | /* jump near, absolute indirect (/4) */ |
| 331 | if ((insn[1] & 0x38) == 0x20) |
| 332 | return 1; |
| 333 | |
| 334 | /* jump far, absolute indirect (/5) */ |
| 335 | if ((insn[1] & 0x38) == 0x28) |
| 336 | return 1; |
| 337 | } |
| 338 | |
| 339 | return 0; |
| 340 | } |
| 341 | |
| 342 | static int |
| 343 | i386_absolute_call_p (const gdb_byte *insn) |
| 344 | { |
| 345 | /* call far, absolute */ |
| 346 | if (insn[0] == 0x9a) |
| 347 | return 1; |
| 348 | |
| 349 | if (insn[0] == 0xff) |
| 350 | { |
| 351 | /* Call near, absolute indirect (/2) */ |
| 352 | if ((insn[1] & 0x38) == 0x10) |
| 353 | return 1; |
| 354 | |
| 355 | /* Call far, absolute indirect (/3) */ |
| 356 | if ((insn[1] & 0x38) == 0x18) |
| 357 | return 1; |
| 358 | } |
| 359 | |
| 360 | return 0; |
| 361 | } |
| 362 | |
| 363 | static int |
| 364 | i386_ret_p (const gdb_byte *insn) |
| 365 | { |
| 366 | switch (insn[0]) |
| 367 | { |
| 368 | case 0xc2: /* ret near, pop N bytes */ |
| 369 | case 0xc3: /* ret near */ |
| 370 | case 0xca: /* ret far, pop N bytes */ |
| 371 | case 0xcb: /* ret far */ |
| 372 | case 0xcf: /* iret */ |
| 373 | return 1; |
| 374 | |
| 375 | default: |
| 376 | return 0; |
| 377 | } |
| 378 | } |
| 379 | |
| 380 | static int |
| 381 | i386_call_p (const gdb_byte *insn) |
| 382 | { |
| 383 | if (i386_absolute_call_p (insn)) |
| 384 | return 1; |
| 385 | |
| 386 | /* call near, relative */ |
| 387 | if (insn[0] == 0xe8) |
| 388 | return 1; |
| 389 | |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | /* Return non-zero if INSN is a system call, and set *LENGTHP to its |
| 394 | length in bytes. Otherwise, return zero. */ |
| 395 | |
| 396 | static int |
| 397 | i386_syscall_p (const gdb_byte *insn, ULONGEST *lengthp) |
| 398 | { |
| 399 | if (insn[0] == 0xcd) |
| 400 | { |
| 401 | *lengthp = 2; |
| 402 | return 1; |
| 403 | } |
| 404 | |
| 405 | return 0; |
| 406 | } |
| 407 | |
| 408 | /* Fix up the state of registers and memory after having single-stepped |
| 409 | a displaced instruction. */ |
| 410 | |
| 411 | void |
| 412 | i386_displaced_step_fixup (struct gdbarch *gdbarch, |
| 413 | struct displaced_step_closure *closure, |
| 414 | CORE_ADDR from, CORE_ADDR to, |
| 415 | struct regcache *regs) |
| 416 | { |
| 417 | /* The offset we applied to the instruction's address. |
| 418 | This could well be negative (when viewed as a signed 32-bit |
| 419 | value), but ULONGEST won't reflect that, so take care when |
| 420 | applying it. */ |
| 421 | ULONGEST insn_offset = to - from; |
| 422 | |
| 423 | /* Since we use simple_displaced_step_copy_insn, our closure is a |
| 424 | copy of the instruction. */ |
| 425 | gdb_byte *insn = (gdb_byte *) closure; |
| 426 | /* The start of the insn, needed in case we see some prefixes. */ |
| 427 | gdb_byte *insn_start = insn; |
| 428 | |
| 429 | if (debug_displaced) |
| 430 | fprintf_unfiltered (gdb_stdlog, |
| 431 | "displaced: fixup (0x%s, 0x%s), " |
| 432 | "insn = 0x%02x 0x%02x ...\n", |
| 433 | paddr_nz (from), paddr_nz (to), insn[0], insn[1]); |
| 434 | |
| 435 | /* The list of issues to contend with here is taken from |
| 436 | resume_execution in arch/i386/kernel/kprobes.c, Linux 2.6.20. |
| 437 | Yay for Free Software! */ |
| 438 | |
| 439 | /* Relocate the %eip, if necessary. */ |
| 440 | |
| 441 | /* The instruction recognizers we use assume any leading prefixes |
| 442 | have been skipped. */ |
| 443 | { |
| 444 | /* This is the size of the buffer in closure. */ |
| 445 | size_t max_insn_len = gdbarch_max_insn_length (gdbarch); |
| 446 | gdb_byte *opcode = i386_skip_prefixes (insn, max_insn_len); |
| 447 | /* If there are too many prefixes, just ignore the insn. |
| 448 | It will fault when run. */ |
| 449 | if (opcode != NULL) |
| 450 | insn = opcode; |
| 451 | } |
| 452 | |
| 453 | /* Except in the case of absolute or indirect jump or call |
| 454 | instructions, or a return instruction, the new eip is relative to |
| 455 | the displaced instruction; make it relative. Well, signal |
| 456 | handler returns don't need relocation either, but we use the |
| 457 | value of %eip to recognize those; see below. */ |
| 458 | if (! i386_absolute_jmp_p (insn) |
| 459 | && ! i386_absolute_call_p (insn) |
| 460 | && ! i386_ret_p (insn)) |
| 461 | { |
| 462 | ULONGEST orig_eip; |
| 463 | ULONGEST insn_len; |
| 464 | |
| 465 | regcache_cooked_read_unsigned (regs, I386_EIP_REGNUM, &orig_eip); |
| 466 | |
| 467 | /* A signal trampoline system call changes the %eip, resuming |
| 468 | execution of the main program after the signal handler has |
| 469 | returned. That makes them like 'return' instructions; we |
| 470 | shouldn't relocate %eip. |
| 471 | |
| 472 | But most system calls don't, and we do need to relocate %eip. |
| 473 | |
| 474 | Our heuristic for distinguishing these cases: if stepping |
| 475 | over the system call instruction left control directly after |
| 476 | the instruction, the we relocate --- control almost certainly |
| 477 | doesn't belong in the displaced copy. Otherwise, we assume |
| 478 | the instruction has put control where it belongs, and leave |
| 479 | it unrelocated. Goodness help us if there are PC-relative |
| 480 | system calls. */ |
| 481 | if (i386_syscall_p (insn, &insn_len) |
| 482 | && orig_eip != to + (insn - insn_start) + insn_len) |
| 483 | { |
| 484 | if (debug_displaced) |
| 485 | fprintf_unfiltered (gdb_stdlog, |
| 486 | "displaced: syscall changed %%eip; " |
| 487 | "not relocating\n"); |
| 488 | } |
| 489 | else |
| 490 | { |
| 491 | ULONGEST eip = (orig_eip - insn_offset) & 0xffffffffUL; |
| 492 | |
| 493 | /* If we just stepped over a breakpoint insn, we don't backup |
| 494 | the pc on purpose; this is to match behaviour without |
| 495 | stepping. */ |
| 496 | |
| 497 | regcache_cooked_write_unsigned (regs, I386_EIP_REGNUM, eip); |
| 498 | |
| 499 | if (debug_displaced) |
| 500 | fprintf_unfiltered (gdb_stdlog, |
| 501 | "displaced: " |
| 502 | "relocated %%eip from 0x%s to 0x%s\n", |
| 503 | paddr_nz (orig_eip), paddr_nz (eip)); |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | /* If the instruction was PUSHFL, then the TF bit will be set in the |
| 508 | pushed value, and should be cleared. We'll leave this for later, |
| 509 | since GDB already messes up the TF flag when stepping over a |
| 510 | pushfl. */ |
| 511 | |
| 512 | /* If the instruction was a call, the return address now atop the |
| 513 | stack is the address following the copied instruction. We need |
| 514 | to make it the address following the original instruction. */ |
| 515 | if (i386_call_p (insn)) |
| 516 | { |
| 517 | ULONGEST esp; |
| 518 | ULONGEST retaddr; |
| 519 | const ULONGEST retaddr_len = 4; |
| 520 | |
| 521 | regcache_cooked_read_unsigned (regs, I386_ESP_REGNUM, &esp); |
| 522 | retaddr = read_memory_unsigned_integer (esp, retaddr_len); |
| 523 | retaddr = (retaddr - insn_offset) & 0xffffffffUL; |
| 524 | write_memory_unsigned_integer (esp, retaddr_len, retaddr); |
| 525 | |
| 526 | if (debug_displaced) |
| 527 | fprintf_unfiltered (gdb_stdlog, |
| 528 | "displaced: relocated return addr at 0x%s " |
| 529 | "to 0x%s\n", |
| 530 | paddr_nz (esp), |
| 531 | paddr_nz (retaddr)); |
| 532 | } |
| 533 | } |
| 534 | \f |
| 535 | #ifdef I386_REGNO_TO_SYMMETRY |
| 536 | #error "The Sequent Symmetry is no longer supported." |
| 537 | #endif |
| 538 | |
| 539 | /* According to the System V ABI, the registers %ebp, %ebx, %edi, %esi |
| 540 | and %esp "belong" to the calling function. Therefore these |
| 541 | registers should be saved if they're going to be modified. */ |
| 542 | |
| 543 | /* The maximum number of saved registers. This should include all |
| 544 | registers mentioned above, and %eip. */ |
| 545 | #define I386_NUM_SAVED_REGS I386_NUM_GREGS |
| 546 | |
| 547 | struct i386_frame_cache |
| 548 | { |
| 549 | /* Base address. */ |
| 550 | CORE_ADDR base; |
| 551 | LONGEST sp_offset; |
| 552 | CORE_ADDR pc; |
| 553 | |
| 554 | /* Saved registers. */ |
| 555 | CORE_ADDR saved_regs[I386_NUM_SAVED_REGS]; |
| 556 | CORE_ADDR saved_sp; |
| 557 | int saved_sp_reg; |
| 558 | int pc_in_eax; |
| 559 | |
| 560 | /* Stack space reserved for local variables. */ |
| 561 | long locals; |
| 562 | }; |
| 563 | |
| 564 | /* Allocate and initialize a frame cache. */ |
| 565 | |
| 566 | static struct i386_frame_cache * |
| 567 | i386_alloc_frame_cache (void) |
| 568 | { |
| 569 | struct i386_frame_cache *cache; |
| 570 | int i; |
| 571 | |
| 572 | cache = FRAME_OBSTACK_ZALLOC (struct i386_frame_cache); |
| 573 | |
| 574 | /* Base address. */ |
| 575 | cache->base = 0; |
| 576 | cache->sp_offset = -4; |
| 577 | cache->pc = 0; |
| 578 | |
| 579 | /* Saved registers. We initialize these to -1 since zero is a valid |
| 580 | offset (that's where %ebp is supposed to be stored). */ |
| 581 | for (i = 0; i < I386_NUM_SAVED_REGS; i++) |
| 582 | cache->saved_regs[i] = -1; |
| 583 | cache->saved_sp = 0; |
| 584 | cache->saved_sp_reg = -1; |
| 585 | cache->pc_in_eax = 0; |
| 586 | |
| 587 | /* Frameless until proven otherwise. */ |
| 588 | cache->locals = -1; |
| 589 | |
| 590 | return cache; |
| 591 | } |
| 592 | |
| 593 | /* If the instruction at PC is a jump, return the address of its |
| 594 | target. Otherwise, return PC. */ |
| 595 | |
| 596 | static CORE_ADDR |
| 597 | i386_follow_jump (CORE_ADDR pc) |
| 598 | { |
| 599 | gdb_byte op; |
| 600 | long delta = 0; |
| 601 | int data16 = 0; |
| 602 | |
| 603 | target_read_memory (pc, &op, 1); |
| 604 | if (op == 0x66) |
| 605 | { |
| 606 | data16 = 1; |
| 607 | op = read_memory_unsigned_integer (pc + 1, 1); |
| 608 | } |
| 609 | |
| 610 | switch (op) |
| 611 | { |
| 612 | case 0xe9: |
| 613 | /* Relative jump: if data16 == 0, disp32, else disp16. */ |
| 614 | if (data16) |
| 615 | { |
| 616 | delta = read_memory_integer (pc + 2, 2); |
| 617 | |
| 618 | /* Include the size of the jmp instruction (including the |
| 619 | 0x66 prefix). */ |
| 620 | delta += 4; |
| 621 | } |
| 622 | else |
| 623 | { |
| 624 | delta = read_memory_integer (pc + 1, 4); |
| 625 | |
| 626 | /* Include the size of the jmp instruction. */ |
| 627 | delta += 5; |
| 628 | } |
| 629 | break; |
| 630 | case 0xeb: |
| 631 | /* Relative jump, disp8 (ignore data16). */ |
| 632 | delta = read_memory_integer (pc + data16 + 1, 1); |
| 633 | |
| 634 | delta += data16 + 2; |
| 635 | break; |
| 636 | } |
| 637 | |
| 638 | return pc + delta; |
| 639 | } |
| 640 | |
| 641 | /* Check whether PC points at a prologue for a function returning a |
| 642 | structure or union. If so, it updates CACHE and returns the |
| 643 | address of the first instruction after the code sequence that |
| 644 | removes the "hidden" argument from the stack or CURRENT_PC, |
| 645 | whichever is smaller. Otherwise, return PC. */ |
| 646 | |
| 647 | static CORE_ADDR |
| 648 | i386_analyze_struct_return (CORE_ADDR pc, CORE_ADDR current_pc, |
| 649 | struct i386_frame_cache *cache) |
| 650 | { |
| 651 | /* Functions that return a structure or union start with: |
| 652 | |
| 653 | popl %eax 0x58 |
| 654 | xchgl %eax, (%esp) 0x87 0x04 0x24 |
| 655 | or xchgl %eax, 0(%esp) 0x87 0x44 0x24 0x00 |
| 656 | |
| 657 | (the System V compiler puts out the second `xchg' instruction, |
| 658 | and the assembler doesn't try to optimize it, so the 'sib' form |
| 659 | gets generated). This sequence is used to get the address of the |
| 660 | return buffer for a function that returns a structure. */ |
| 661 | static gdb_byte proto1[3] = { 0x87, 0x04, 0x24 }; |
| 662 | static gdb_byte proto2[4] = { 0x87, 0x44, 0x24, 0x00 }; |
| 663 | gdb_byte buf[4]; |
| 664 | gdb_byte op; |
| 665 | |
| 666 | if (current_pc <= pc) |
| 667 | return pc; |
| 668 | |
| 669 | target_read_memory (pc, &op, 1); |
| 670 | |
| 671 | if (op != 0x58) /* popl %eax */ |
| 672 | return pc; |
| 673 | |
| 674 | target_read_memory (pc + 1, buf, 4); |
| 675 | if (memcmp (buf, proto1, 3) != 0 && memcmp (buf, proto2, 4) != 0) |
| 676 | return pc; |
| 677 | |
| 678 | if (current_pc == pc) |
| 679 | { |
| 680 | cache->sp_offset += 4; |
| 681 | return current_pc; |
| 682 | } |
| 683 | |
| 684 | if (current_pc == pc + 1) |
| 685 | { |
| 686 | cache->pc_in_eax = 1; |
| 687 | return current_pc; |
| 688 | } |
| 689 | |
| 690 | if (buf[1] == proto1[1]) |
| 691 | return pc + 4; |
| 692 | else |
| 693 | return pc + 5; |
| 694 | } |
| 695 | |
| 696 | static CORE_ADDR |
| 697 | i386_skip_probe (CORE_ADDR pc) |
| 698 | { |
| 699 | /* A function may start with |
| 700 | |
| 701 | pushl constant |
| 702 | call _probe |
| 703 | addl $4, %esp |
| 704 | |
| 705 | followed by |
| 706 | |
| 707 | pushl %ebp |
| 708 | |
| 709 | etc. */ |
| 710 | gdb_byte buf[8]; |
| 711 | gdb_byte op; |
| 712 | |
| 713 | target_read_memory (pc, &op, 1); |
| 714 | |
| 715 | if (op == 0x68 || op == 0x6a) |
| 716 | { |
| 717 | int delta; |
| 718 | |
| 719 | /* Skip past the `pushl' instruction; it has either a one-byte or a |
| 720 | four-byte operand, depending on the opcode. */ |
| 721 | if (op == 0x68) |
| 722 | delta = 5; |
| 723 | else |
| 724 | delta = 2; |
| 725 | |
| 726 | /* Read the following 8 bytes, which should be `call _probe' (6 |
| 727 | bytes) followed by `addl $4,%esp' (2 bytes). */ |
| 728 | read_memory (pc + delta, buf, sizeof (buf)); |
| 729 | if (buf[0] == 0xe8 && buf[6] == 0xc4 && buf[7] == 0x4) |
| 730 | pc += delta + sizeof (buf); |
| 731 | } |
| 732 | |
| 733 | return pc; |
| 734 | } |
| 735 | |
| 736 | /* GCC 4.1 and later, can put code in the prologue to realign the |
| 737 | stack pointer. Check whether PC points to such code, and update |
| 738 | CACHE accordingly. Return the first instruction after the code |
| 739 | sequence or CURRENT_PC, whichever is smaller. If we don't |
| 740 | recognize the code, return PC. */ |
| 741 | |
| 742 | static CORE_ADDR |
| 743 | i386_analyze_stack_align (CORE_ADDR pc, CORE_ADDR current_pc, |
| 744 | struct i386_frame_cache *cache) |
| 745 | { |
| 746 | /* There are 2 code sequences to re-align stack before the frame |
| 747 | gets set up: |
| 748 | |
| 749 | 1. Use a caller-saved saved register: |
| 750 | |
| 751 | leal 4(%esp), %reg |
| 752 | andl $-XXX, %esp |
| 753 | pushl -4(%reg) |
| 754 | |
| 755 | 2. Use a callee-saved saved register: |
| 756 | |
| 757 | pushl %reg |
| 758 | leal 8(%esp), %reg |
| 759 | andl $-XXX, %esp |
| 760 | pushl -4(%reg) |
| 761 | |
| 762 | "andl $-XXX, %esp" can be either 3 bytes or 6 bytes: |
| 763 | |
| 764 | 0x83 0xe4 0xf0 andl $-16, %esp |
| 765 | 0x81 0xe4 0x00 0xff 0xff 0xff andl $-256, %esp |
| 766 | */ |
| 767 | |
| 768 | gdb_byte buf[14]; |
| 769 | int reg; |
| 770 | int offset, offset_and; |
| 771 | static int regnums[8] = { |
| 772 | I386_EAX_REGNUM, /* %eax */ |
| 773 | I386_ECX_REGNUM, /* %ecx */ |
| 774 | I386_EDX_REGNUM, /* %edx */ |
| 775 | I386_EBX_REGNUM, /* %ebx */ |
| 776 | I386_ESP_REGNUM, /* %esp */ |
| 777 | I386_EBP_REGNUM, /* %ebp */ |
| 778 | I386_ESI_REGNUM, /* %esi */ |
| 779 | I386_EDI_REGNUM /* %edi */ |
| 780 | }; |
| 781 | |
| 782 | if (target_read_memory (pc, buf, sizeof buf)) |
| 783 | return pc; |
| 784 | |
| 785 | /* Check caller-saved saved register. The first instruction has |
| 786 | to be "leal 4(%esp), %reg". */ |
| 787 | if (buf[0] == 0x8d && buf[2] == 0x24 && buf[3] == 0x4) |
| 788 | { |
| 789 | /* MOD must be binary 10 and R/M must be binary 100. */ |
| 790 | if ((buf[1] & 0xc7) != 0x44) |
| 791 | return pc; |
| 792 | |
| 793 | /* REG has register number. */ |
| 794 | reg = (buf[1] >> 3) & 7; |
| 795 | offset = 4; |
| 796 | } |
| 797 | else |
| 798 | { |
| 799 | /* Check callee-saved saved register. The first instruction |
| 800 | has to be "pushl %reg". */ |
| 801 | if ((buf[0] & 0xf8) != 0x50) |
| 802 | return pc; |
| 803 | |
| 804 | /* Get register. */ |
| 805 | reg = buf[0] & 0x7; |
| 806 | |
| 807 | /* The next instruction has to be "leal 8(%esp), %reg". */ |
| 808 | if (buf[1] != 0x8d || buf[3] != 0x24 || buf[4] != 0x8) |
| 809 | return pc; |
| 810 | |
| 811 | /* MOD must be binary 10 and R/M must be binary 100. */ |
| 812 | if ((buf[2] & 0xc7) != 0x44) |
| 813 | return pc; |
| 814 | |
| 815 | /* REG has register number. Registers in pushl and leal have to |
| 816 | be the same. */ |
| 817 | if (reg != ((buf[2] >> 3) & 7)) |
| 818 | return pc; |
| 819 | |
| 820 | offset = 5; |
| 821 | } |
| 822 | |
| 823 | /* Rigister can't be %esp nor %ebp. */ |
| 824 | if (reg == 4 || reg == 5) |
| 825 | return pc; |
| 826 | |
| 827 | /* The next instruction has to be "andl $-XXX, %esp". */ |
| 828 | if (buf[offset + 1] != 0xe4 |
| 829 | || (buf[offset] != 0x81 && buf[offset] != 0x83)) |
| 830 | return pc; |
| 831 | |
| 832 | offset_and = offset; |
| 833 | offset += buf[offset] == 0x81 ? 6 : 3; |
| 834 | |
| 835 | /* The next instruction has to be "pushl -4(%reg)". 8bit -4 is |
| 836 | 0xfc. REG must be binary 110 and MOD must be binary 01. */ |
| 837 | if (buf[offset] != 0xff |
| 838 | || buf[offset + 2] != 0xfc |
| 839 | || (buf[offset + 1] & 0xf8) != 0x70) |
| 840 | return pc; |
| 841 | |
| 842 | /* R/M has register. Registers in leal and pushl have to be the |
| 843 | same. */ |
| 844 | if (reg != (buf[offset + 1] & 7)) |
| 845 | return pc; |
| 846 | |
| 847 | if (current_pc > pc + offset_and) |
| 848 | cache->saved_sp_reg = regnums[reg]; |
| 849 | |
| 850 | return min (pc + offset + 3, current_pc); |
| 851 | } |
| 852 | |
| 853 | /* Maximum instruction length we need to handle. */ |
| 854 | #define I386_MAX_MATCHED_INSN_LEN 6 |
| 855 | |
| 856 | /* Instruction description. */ |
| 857 | struct i386_insn |
| 858 | { |
| 859 | size_t len; |
| 860 | gdb_byte insn[I386_MAX_MATCHED_INSN_LEN]; |
| 861 | gdb_byte mask[I386_MAX_MATCHED_INSN_LEN]; |
| 862 | }; |
| 863 | |
| 864 | /* Search for the instruction at PC in the list SKIP_INSNS. Return |
| 865 | the first instruction description that matches. Otherwise, return |
| 866 | NULL. */ |
| 867 | |
| 868 | static struct i386_insn * |
| 869 | i386_match_insn (CORE_ADDR pc, struct i386_insn *skip_insns) |
| 870 | { |
| 871 | struct i386_insn *insn; |
| 872 | gdb_byte op; |
| 873 | |
| 874 | target_read_memory (pc, &op, 1); |
| 875 | |
| 876 | for (insn = skip_insns; insn->len > 0; insn++) |
| 877 | { |
| 878 | if ((op & insn->mask[0]) == insn->insn[0]) |
| 879 | { |
| 880 | gdb_byte buf[I386_MAX_MATCHED_INSN_LEN - 1]; |
| 881 | int insn_matched = 1; |
| 882 | size_t i; |
| 883 | |
| 884 | gdb_assert (insn->len > 1); |
| 885 | gdb_assert (insn->len <= I386_MAX_MATCHED_INSN_LEN); |
| 886 | |
| 887 | target_read_memory (pc + 1, buf, insn->len - 1); |
| 888 | for (i = 1; i < insn->len; i++) |
| 889 | { |
| 890 | if ((buf[i - 1] & insn->mask[i]) != insn->insn[i]) |
| 891 | insn_matched = 0; |
| 892 | } |
| 893 | |
| 894 | if (insn_matched) |
| 895 | return insn; |
| 896 | } |
| 897 | } |
| 898 | |
| 899 | return NULL; |
| 900 | } |
| 901 | |
| 902 | /* Some special instructions that might be migrated by GCC into the |
| 903 | part of the prologue that sets up the new stack frame. Because the |
| 904 | stack frame hasn't been setup yet, no registers have been saved |
| 905 | yet, and only the scratch registers %eax, %ecx and %edx can be |
| 906 | touched. */ |
| 907 | |
| 908 | struct i386_insn i386_frame_setup_skip_insns[] = |
| 909 | { |
| 910 | /* Check for `movb imm8, r' and `movl imm32, r'. |
| 911 | |
| 912 | ??? Should we handle 16-bit operand-sizes here? */ |
| 913 | |
| 914 | /* `movb imm8, %al' and `movb imm8, %ah' */ |
| 915 | /* `movb imm8, %cl' and `movb imm8, %ch' */ |
| 916 | { 2, { 0xb0, 0x00 }, { 0xfa, 0x00 } }, |
| 917 | /* `movb imm8, %dl' and `movb imm8, %dh' */ |
| 918 | { 2, { 0xb2, 0x00 }, { 0xfb, 0x00 } }, |
| 919 | /* `movl imm32, %eax' and `movl imm32, %ecx' */ |
| 920 | { 5, { 0xb8 }, { 0xfe } }, |
| 921 | /* `movl imm32, %edx' */ |
| 922 | { 5, { 0xba }, { 0xff } }, |
| 923 | |
| 924 | /* Check for `mov imm32, r32'. Note that there is an alternative |
| 925 | encoding for `mov m32, %eax'. |
| 926 | |
| 927 | ??? Should we handle SIB adressing here? |
| 928 | ??? Should we handle 16-bit operand-sizes here? */ |
| 929 | |
| 930 | /* `movl m32, %eax' */ |
| 931 | { 5, { 0xa1 }, { 0xff } }, |
| 932 | /* `movl m32, %eax' and `mov; m32, %ecx' */ |
| 933 | { 6, { 0x89, 0x05 }, {0xff, 0xf7 } }, |
| 934 | /* `movl m32, %edx' */ |
| 935 | { 6, { 0x89, 0x15 }, {0xff, 0xff } }, |
| 936 | |
| 937 | /* Check for `xorl r32, r32' and the equivalent `subl r32, r32'. |
| 938 | Because of the symmetry, there are actually two ways to encode |
| 939 | these instructions; opcode bytes 0x29 and 0x2b for `subl' and |
| 940 | opcode bytes 0x31 and 0x33 for `xorl'. */ |
| 941 | |
| 942 | /* `subl %eax, %eax' */ |
| 943 | { 2, { 0x29, 0xc0 }, { 0xfd, 0xff } }, |
| 944 | /* `subl %ecx, %ecx' */ |
| 945 | { 2, { 0x29, 0xc9 }, { 0xfd, 0xff } }, |
| 946 | /* `subl %edx, %edx' */ |
| 947 | { 2, { 0x29, 0xd2 }, { 0xfd, 0xff } }, |
| 948 | /* `xorl %eax, %eax' */ |
| 949 | { 2, { 0x31, 0xc0 }, { 0xfd, 0xff } }, |
| 950 | /* `xorl %ecx, %ecx' */ |
| 951 | { 2, { 0x31, 0xc9 }, { 0xfd, 0xff } }, |
| 952 | /* `xorl %edx, %edx' */ |
| 953 | { 2, { 0x31, 0xd2 }, { 0xfd, 0xff } }, |
| 954 | { 0 } |
| 955 | }; |
| 956 | |
| 957 | |
| 958 | /* Check whether PC points to a no-op instruction. */ |
| 959 | static CORE_ADDR |
| 960 | i386_skip_noop (CORE_ADDR pc) |
| 961 | { |
| 962 | gdb_byte op; |
| 963 | int check = 1; |
| 964 | |
| 965 | target_read_memory (pc, &op, 1); |
| 966 | |
| 967 | while (check) |
| 968 | { |
| 969 | check = 0; |
| 970 | /* Ignore `nop' instruction. */ |
| 971 | if (op == 0x90) |
| 972 | { |
| 973 | pc += 1; |
| 974 | target_read_memory (pc, &op, 1); |
| 975 | check = 1; |
| 976 | } |
| 977 | /* Ignore no-op instruction `mov %edi, %edi'. |
| 978 | Microsoft system dlls often start with |
| 979 | a `mov %edi,%edi' instruction. |
| 980 | The 5 bytes before the function start are |
| 981 | filled with `nop' instructions. |
| 982 | This pattern can be used for hot-patching: |
| 983 | The `mov %edi, %edi' instruction can be replaced by a |
| 984 | near jump to the location of the 5 `nop' instructions |
| 985 | which can be replaced by a 32-bit jump to anywhere |
| 986 | in the 32-bit address space. */ |
| 987 | |
| 988 | else if (op == 0x8b) |
| 989 | { |
| 990 | target_read_memory (pc + 1, &op, 1); |
| 991 | if (op == 0xff) |
| 992 | { |
| 993 | pc += 2; |
| 994 | target_read_memory (pc, &op, 1); |
| 995 | check = 1; |
| 996 | } |
| 997 | } |
| 998 | } |
| 999 | return pc; |
| 1000 | } |
| 1001 | |
| 1002 | /* Check whether PC points at a code that sets up a new stack frame. |
| 1003 | If so, it updates CACHE and returns the address of the first |
| 1004 | instruction after the sequence that sets up the frame or LIMIT, |
| 1005 | whichever is smaller. If we don't recognize the code, return PC. */ |
| 1006 | |
| 1007 | static CORE_ADDR |
| 1008 | i386_analyze_frame_setup (CORE_ADDR pc, CORE_ADDR limit, |
| 1009 | struct i386_frame_cache *cache) |
| 1010 | { |
| 1011 | struct i386_insn *insn; |
| 1012 | gdb_byte op; |
| 1013 | int skip = 0; |
| 1014 | |
| 1015 | if (limit <= pc) |
| 1016 | return limit; |
| 1017 | |
| 1018 | target_read_memory (pc, &op, 1); |
| 1019 | |
| 1020 | if (op == 0x55) /* pushl %ebp */ |
| 1021 | { |
| 1022 | /* Take into account that we've executed the `pushl %ebp' that |
| 1023 | starts this instruction sequence. */ |
| 1024 | cache->saved_regs[I386_EBP_REGNUM] = 0; |
| 1025 | cache->sp_offset += 4; |
| 1026 | pc++; |
| 1027 | |
| 1028 | /* If that's all, return now. */ |
| 1029 | if (limit <= pc) |
| 1030 | return limit; |
| 1031 | |
| 1032 | /* Check for some special instructions that might be migrated by |
| 1033 | GCC into the prologue and skip them. At this point in the |
| 1034 | prologue, code should only touch the scratch registers %eax, |
| 1035 | %ecx and %edx, so while the number of posibilities is sheer, |
| 1036 | it is limited. |
| 1037 | |
| 1038 | Make sure we only skip these instructions if we later see the |
| 1039 | `movl %esp, %ebp' that actually sets up the frame. */ |
| 1040 | while (pc + skip < limit) |
| 1041 | { |
| 1042 | insn = i386_match_insn (pc + skip, i386_frame_setup_skip_insns); |
| 1043 | if (insn == NULL) |
| 1044 | break; |
| 1045 | |
| 1046 | skip += insn->len; |
| 1047 | } |
| 1048 | |
| 1049 | /* If that's all, return now. */ |
| 1050 | if (limit <= pc + skip) |
| 1051 | return limit; |
| 1052 | |
| 1053 | target_read_memory (pc + skip, &op, 1); |
| 1054 | |
| 1055 | /* Check for `movl %esp, %ebp' -- can be written in two ways. */ |
| 1056 | switch (op) |
| 1057 | { |
| 1058 | case 0x8b: |
| 1059 | if (read_memory_unsigned_integer (pc + skip + 1, 1) != 0xec) |
| 1060 | return pc; |
| 1061 | break; |
| 1062 | case 0x89: |
| 1063 | if (read_memory_unsigned_integer (pc + skip + 1, 1) != 0xe5) |
| 1064 | return pc; |
| 1065 | break; |
| 1066 | default: |
| 1067 | return pc; |
| 1068 | } |
| 1069 | |
| 1070 | /* OK, we actually have a frame. We just don't know how large |
| 1071 | it is yet. Set its size to zero. We'll adjust it if |
| 1072 | necessary. We also now commit to skipping the special |
| 1073 | instructions mentioned before. */ |
| 1074 | cache->locals = 0; |
| 1075 | pc += (skip + 2); |
| 1076 | |
| 1077 | /* If that's all, return now. */ |
| 1078 | if (limit <= pc) |
| 1079 | return limit; |
| 1080 | |
| 1081 | /* Check for stack adjustment |
| 1082 | |
| 1083 | subl $XXX, %esp |
| 1084 | |
| 1085 | NOTE: You can't subtract a 16-bit immediate from a 32-bit |
| 1086 | reg, so we don't have to worry about a data16 prefix. */ |
| 1087 | target_read_memory (pc, &op, 1); |
| 1088 | if (op == 0x83) |
| 1089 | { |
| 1090 | /* `subl' with 8-bit immediate. */ |
| 1091 | if (read_memory_unsigned_integer (pc + 1, 1) != 0xec) |
| 1092 | /* Some instruction starting with 0x83 other than `subl'. */ |
| 1093 | return pc; |
| 1094 | |
| 1095 | /* `subl' with signed 8-bit immediate (though it wouldn't |
| 1096 | make sense to be negative). */ |
| 1097 | cache->locals = read_memory_integer (pc + 2, 1); |
| 1098 | return pc + 3; |
| 1099 | } |
| 1100 | else if (op == 0x81) |
| 1101 | { |
| 1102 | /* Maybe it is `subl' with a 32-bit immediate. */ |
| 1103 | if (read_memory_unsigned_integer (pc + 1, 1) != 0xec) |
| 1104 | /* Some instruction starting with 0x81 other than `subl'. */ |
| 1105 | return pc; |
| 1106 | |
| 1107 | /* It is `subl' with a 32-bit immediate. */ |
| 1108 | cache->locals = read_memory_integer (pc + 2, 4); |
| 1109 | return pc + 6; |
| 1110 | } |
| 1111 | else |
| 1112 | { |
| 1113 | /* Some instruction other than `subl'. */ |
| 1114 | return pc; |
| 1115 | } |
| 1116 | } |
| 1117 | else if (op == 0xc8) /* enter */ |
| 1118 | { |
| 1119 | cache->locals = read_memory_unsigned_integer (pc + 1, 2); |
| 1120 | return pc + 4; |
| 1121 | } |
| 1122 | |
| 1123 | return pc; |
| 1124 | } |
| 1125 | |
| 1126 | /* Check whether PC points at code that saves registers on the stack. |
| 1127 | If so, it updates CACHE and returns the address of the first |
| 1128 | instruction after the register saves or CURRENT_PC, whichever is |
| 1129 | smaller. Otherwise, return PC. */ |
| 1130 | |
| 1131 | static CORE_ADDR |
| 1132 | i386_analyze_register_saves (CORE_ADDR pc, CORE_ADDR current_pc, |
| 1133 | struct i386_frame_cache *cache) |
| 1134 | { |
| 1135 | CORE_ADDR offset = 0; |
| 1136 | gdb_byte op; |
| 1137 | int i; |
| 1138 | |
| 1139 | if (cache->locals > 0) |
| 1140 | offset -= cache->locals; |
| 1141 | for (i = 0; i < 8 && pc < current_pc; i++) |
| 1142 | { |
| 1143 | target_read_memory (pc, &op, 1); |
| 1144 | if (op < 0x50 || op > 0x57) |
| 1145 | break; |
| 1146 | |
| 1147 | offset -= 4; |
| 1148 | cache->saved_regs[op - 0x50] = offset; |
| 1149 | cache->sp_offset += 4; |
| 1150 | pc++; |
| 1151 | } |
| 1152 | |
| 1153 | return pc; |
| 1154 | } |
| 1155 | |
| 1156 | /* Do a full analysis of the prologue at PC and update CACHE |
| 1157 | accordingly. Bail out early if CURRENT_PC is reached. Return the |
| 1158 | address where the analysis stopped. |
| 1159 | |
| 1160 | We handle these cases: |
| 1161 | |
| 1162 | The startup sequence can be at the start of the function, or the |
| 1163 | function can start with a branch to startup code at the end. |
| 1164 | |
| 1165 | %ebp can be set up with either the 'enter' instruction, or "pushl |
| 1166 | %ebp, movl %esp, %ebp" (`enter' is too slow to be useful, but was |
| 1167 | once used in the System V compiler). |
| 1168 | |
| 1169 | Local space is allocated just below the saved %ebp by either the |
| 1170 | 'enter' instruction, or by "subl $<size>, %esp". 'enter' has a |
| 1171 | 16-bit unsigned argument for space to allocate, and the 'addl' |
| 1172 | instruction could have either a signed byte, or 32-bit immediate. |
| 1173 | |
| 1174 | Next, the registers used by this function are pushed. With the |
| 1175 | System V compiler they will always be in the order: %edi, %esi, |
| 1176 | %ebx (and sometimes a harmless bug causes it to also save but not |
| 1177 | restore %eax); however, the code below is willing to see the pushes |
| 1178 | in any order, and will handle up to 8 of them. |
| 1179 | |
| 1180 | If the setup sequence is at the end of the function, then the next |
| 1181 | instruction will be a branch back to the start. */ |
| 1182 | |
| 1183 | static CORE_ADDR |
| 1184 | i386_analyze_prologue (CORE_ADDR pc, CORE_ADDR current_pc, |
| 1185 | struct i386_frame_cache *cache) |
| 1186 | { |
| 1187 | pc = i386_skip_noop (pc); |
| 1188 | pc = i386_follow_jump (pc); |
| 1189 | pc = i386_analyze_struct_return (pc, current_pc, cache); |
| 1190 | pc = i386_skip_probe (pc); |
| 1191 | pc = i386_analyze_stack_align (pc, current_pc, cache); |
| 1192 | pc = i386_analyze_frame_setup (pc, current_pc, cache); |
| 1193 | return i386_analyze_register_saves (pc, current_pc, cache); |
| 1194 | } |
| 1195 | |
| 1196 | /* Return PC of first real instruction. */ |
| 1197 | |
| 1198 | static CORE_ADDR |
| 1199 | i386_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR start_pc) |
| 1200 | { |
| 1201 | static gdb_byte pic_pat[6] = |
| 1202 | { |
| 1203 | 0xe8, 0, 0, 0, 0, /* call 0x0 */ |
| 1204 | 0x5b, /* popl %ebx */ |
| 1205 | }; |
| 1206 | struct i386_frame_cache cache; |
| 1207 | CORE_ADDR pc; |
| 1208 | gdb_byte op; |
| 1209 | int i; |
| 1210 | |
| 1211 | cache.locals = -1; |
| 1212 | pc = i386_analyze_prologue (start_pc, 0xffffffff, &cache); |
| 1213 | if (cache.locals < 0) |
| 1214 | return start_pc; |
| 1215 | |
| 1216 | /* Found valid frame setup. */ |
| 1217 | |
| 1218 | /* The native cc on SVR4 in -K PIC mode inserts the following code |
| 1219 | to get the address of the global offset table (GOT) into register |
| 1220 | %ebx: |
| 1221 | |
| 1222 | call 0x0 |
| 1223 | popl %ebx |
| 1224 | movl %ebx,x(%ebp) (optional) |
| 1225 | addl y,%ebx |
| 1226 | |
| 1227 | This code is with the rest of the prologue (at the end of the |
| 1228 | function), so we have to skip it to get to the first real |
| 1229 | instruction at the start of the function. */ |
| 1230 | |
| 1231 | for (i = 0; i < 6; i++) |
| 1232 | { |
| 1233 | target_read_memory (pc + i, &op, 1); |
| 1234 | if (pic_pat[i] != op) |
| 1235 | break; |
| 1236 | } |
| 1237 | if (i == 6) |
| 1238 | { |
| 1239 | int delta = 6; |
| 1240 | |
| 1241 | target_read_memory (pc + delta, &op, 1); |
| 1242 | |
| 1243 | if (op == 0x89) /* movl %ebx, x(%ebp) */ |
| 1244 | { |
| 1245 | op = read_memory_unsigned_integer (pc + delta + 1, 1); |
| 1246 | |
| 1247 | if (op == 0x5d) /* One byte offset from %ebp. */ |
| 1248 | delta += 3; |
| 1249 | else if (op == 0x9d) /* Four byte offset from %ebp. */ |
| 1250 | delta += 6; |
| 1251 | else /* Unexpected instruction. */ |
| 1252 | delta = 0; |
| 1253 | |
| 1254 | target_read_memory (pc + delta, &op, 1); |
| 1255 | } |
| 1256 | |
| 1257 | /* addl y,%ebx */ |
| 1258 | if (delta > 0 && op == 0x81 |
| 1259 | && read_memory_unsigned_integer (pc + delta + 1, 1) == 0xc3) |
| 1260 | { |
| 1261 | pc += delta + 6; |
| 1262 | } |
| 1263 | } |
| 1264 | |
| 1265 | /* If the function starts with a branch (to startup code at the end) |
| 1266 | the last instruction should bring us back to the first |
| 1267 | instruction of the real code. */ |
| 1268 | if (i386_follow_jump (start_pc) != start_pc) |
| 1269 | pc = i386_follow_jump (pc); |
| 1270 | |
| 1271 | return pc; |
| 1272 | } |
| 1273 | |
| 1274 | /* Check that the code pointed to by PC corresponds to a call to |
| 1275 | __main, skip it if so. Return PC otherwise. */ |
| 1276 | |
| 1277 | CORE_ADDR |
| 1278 | i386_skip_main_prologue (struct gdbarch *gdbarch, CORE_ADDR pc) |
| 1279 | { |
| 1280 | gdb_byte op; |
| 1281 | |
| 1282 | target_read_memory (pc, &op, 1); |
| 1283 | if (op == 0xe8) |
| 1284 | { |
| 1285 | gdb_byte buf[4]; |
| 1286 | |
| 1287 | if (target_read_memory (pc + 1, buf, sizeof buf) == 0) |
| 1288 | { |
| 1289 | /* Make sure address is computed correctly as a 32bit |
| 1290 | integer even if CORE_ADDR is 64 bit wide. */ |
| 1291 | struct minimal_symbol *s; |
| 1292 | CORE_ADDR call_dest = pc + 5 + extract_signed_integer (buf, 4); |
| 1293 | |
| 1294 | call_dest = call_dest & 0xffffffffU; |
| 1295 | s = lookup_minimal_symbol_by_pc (call_dest); |
| 1296 | if (s != NULL |
| 1297 | && SYMBOL_LINKAGE_NAME (s) != NULL |
| 1298 | && strcmp (SYMBOL_LINKAGE_NAME (s), "__main") == 0) |
| 1299 | pc += 5; |
| 1300 | } |
| 1301 | } |
| 1302 | |
| 1303 | return pc; |
| 1304 | } |
| 1305 | |
| 1306 | /* This function is 64-bit safe. */ |
| 1307 | |
| 1308 | static CORE_ADDR |
| 1309 | i386_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) |
| 1310 | { |
| 1311 | gdb_byte buf[8]; |
| 1312 | |
| 1313 | frame_unwind_register (next_frame, gdbarch_pc_regnum (gdbarch), buf); |
| 1314 | return extract_typed_address (buf, builtin_type (gdbarch)->builtin_func_ptr); |
| 1315 | } |
| 1316 | \f |
| 1317 | |
| 1318 | /* Normal frames. */ |
| 1319 | |
| 1320 | static struct i386_frame_cache * |
| 1321 | i386_frame_cache (struct frame_info *this_frame, void **this_cache) |
| 1322 | { |
| 1323 | struct i386_frame_cache *cache; |
| 1324 | gdb_byte buf[4]; |
| 1325 | int i; |
| 1326 | |
| 1327 | if (*this_cache) |
| 1328 | return *this_cache; |
| 1329 | |
| 1330 | cache = i386_alloc_frame_cache (); |
| 1331 | *this_cache = cache; |
| 1332 | |
| 1333 | /* In principle, for normal frames, %ebp holds the frame pointer, |
| 1334 | which holds the base address for the current stack frame. |
| 1335 | However, for functions that don't need it, the frame pointer is |
| 1336 | optional. For these "frameless" functions the frame pointer is |
| 1337 | actually the frame pointer of the calling frame. Signal |
| 1338 | trampolines are just a special case of a "frameless" function. |
| 1339 | They (usually) share their frame pointer with the frame that was |
| 1340 | in progress when the signal occurred. */ |
| 1341 | |
| 1342 | get_frame_register (this_frame, I386_EBP_REGNUM, buf); |
| 1343 | cache->base = extract_unsigned_integer (buf, 4); |
| 1344 | if (cache->base == 0) |
| 1345 | return cache; |
| 1346 | |
| 1347 | /* For normal frames, %eip is stored at 4(%ebp). */ |
| 1348 | cache->saved_regs[I386_EIP_REGNUM] = 4; |
| 1349 | |
| 1350 | cache->pc = get_frame_func (this_frame); |
| 1351 | if (cache->pc != 0) |
| 1352 | i386_analyze_prologue (cache->pc, get_frame_pc (this_frame), cache); |
| 1353 | |
| 1354 | if (cache->saved_sp_reg != -1) |
| 1355 | { |
| 1356 | /* Saved stack pointer has been saved. */ |
| 1357 | get_frame_register (this_frame, cache->saved_sp_reg, buf); |
| 1358 | cache->saved_sp = extract_unsigned_integer(buf, 4); |
| 1359 | } |
| 1360 | |
| 1361 | if (cache->locals < 0) |
| 1362 | { |
| 1363 | /* We didn't find a valid frame, which means that CACHE->base |
| 1364 | currently holds the frame pointer for our calling frame. If |
| 1365 | we're at the start of a function, or somewhere half-way its |
| 1366 | prologue, the function's frame probably hasn't been fully |
| 1367 | setup yet. Try to reconstruct the base address for the stack |
| 1368 | frame by looking at the stack pointer. For truly "frameless" |
| 1369 | functions this might work too. */ |
| 1370 | |
| 1371 | if (cache->saved_sp_reg != -1) |
| 1372 | { |
| 1373 | /* We're halfway aligning the stack. */ |
| 1374 | cache->base = ((cache->saved_sp - 4) & 0xfffffff0) - 4; |
| 1375 | cache->saved_regs[I386_EIP_REGNUM] = cache->saved_sp - 4; |
| 1376 | |
| 1377 | /* This will be added back below. */ |
| 1378 | cache->saved_regs[I386_EIP_REGNUM] -= cache->base; |
| 1379 | } |
| 1380 | else |
| 1381 | { |
| 1382 | get_frame_register (this_frame, I386_ESP_REGNUM, buf); |
| 1383 | cache->base = extract_unsigned_integer (buf, 4) + cache->sp_offset; |
| 1384 | } |
| 1385 | } |
| 1386 | |
| 1387 | /* Now that we have the base address for the stack frame we can |
| 1388 | calculate the value of %esp in the calling frame. */ |
| 1389 | if (cache->saved_sp == 0) |
| 1390 | cache->saved_sp = cache->base + 8; |
| 1391 | |
| 1392 | /* Adjust all the saved registers such that they contain addresses |
| 1393 | instead of offsets. */ |
| 1394 | for (i = 0; i < I386_NUM_SAVED_REGS; i++) |
| 1395 | if (cache->saved_regs[i] != -1) |
| 1396 | cache->saved_regs[i] += cache->base; |
| 1397 | |
| 1398 | return cache; |
| 1399 | } |
| 1400 | |
| 1401 | static void |
| 1402 | i386_frame_this_id (struct frame_info *this_frame, void **this_cache, |
| 1403 | struct frame_id *this_id) |
| 1404 | { |
| 1405 | struct i386_frame_cache *cache = i386_frame_cache (this_frame, this_cache); |
| 1406 | |
| 1407 | /* This marks the outermost frame. */ |
| 1408 | if (cache->base == 0) |
| 1409 | return; |
| 1410 | |
| 1411 | /* See the end of i386_push_dummy_call. */ |
| 1412 | (*this_id) = frame_id_build (cache->base + 8, cache->pc); |
| 1413 | } |
| 1414 | |
| 1415 | static struct value * |
| 1416 | i386_frame_prev_register (struct frame_info *this_frame, void **this_cache, |
| 1417 | int regnum) |
| 1418 | { |
| 1419 | struct i386_frame_cache *cache = i386_frame_cache (this_frame, this_cache); |
| 1420 | |
| 1421 | gdb_assert (regnum >= 0); |
| 1422 | |
| 1423 | /* The System V ABI says that: |
| 1424 | |
| 1425 | "The flags register contains the system flags, such as the |
| 1426 | direction flag and the carry flag. The direction flag must be |
| 1427 | set to the forward (that is, zero) direction before entry and |
| 1428 | upon exit from a function. Other user flags have no specified |
| 1429 | role in the standard calling sequence and are not preserved." |
| 1430 | |
| 1431 | To guarantee the "upon exit" part of that statement we fake a |
| 1432 | saved flags register that has its direction flag cleared. |
| 1433 | |
| 1434 | Note that GCC doesn't seem to rely on the fact that the direction |
| 1435 | flag is cleared after a function return; it always explicitly |
| 1436 | clears the flag before operations where it matters. |
| 1437 | |
| 1438 | FIXME: kettenis/20030316: I'm not quite sure whether this is the |
| 1439 | right thing to do. The way we fake the flags register here makes |
| 1440 | it impossible to change it. */ |
| 1441 | |
| 1442 | if (regnum == I386_EFLAGS_REGNUM) |
| 1443 | { |
| 1444 | ULONGEST val; |
| 1445 | |
| 1446 | val = get_frame_register_unsigned (this_frame, regnum); |
| 1447 | val &= ~(1 << 10); |
| 1448 | return frame_unwind_got_constant (this_frame, regnum, val); |
| 1449 | } |
| 1450 | |
| 1451 | if (regnum == I386_EIP_REGNUM && cache->pc_in_eax) |
| 1452 | return frame_unwind_got_register (this_frame, regnum, I386_EAX_REGNUM); |
| 1453 | |
| 1454 | if (regnum == I386_ESP_REGNUM && cache->saved_sp) |
| 1455 | return frame_unwind_got_constant (this_frame, regnum, cache->saved_sp); |
| 1456 | |
| 1457 | if (regnum < I386_NUM_SAVED_REGS && cache->saved_regs[regnum] != -1) |
| 1458 | return frame_unwind_got_memory (this_frame, regnum, |
| 1459 | cache->saved_regs[regnum]); |
| 1460 | |
| 1461 | return frame_unwind_got_register (this_frame, regnum, regnum); |
| 1462 | } |
| 1463 | |
| 1464 | static const struct frame_unwind i386_frame_unwind = |
| 1465 | { |
| 1466 | NORMAL_FRAME, |
| 1467 | i386_frame_this_id, |
| 1468 | i386_frame_prev_register, |
| 1469 | NULL, |
| 1470 | default_frame_sniffer |
| 1471 | }; |
| 1472 | \f |
| 1473 | |
| 1474 | /* Signal trampolines. */ |
| 1475 | |
| 1476 | static struct i386_frame_cache * |
| 1477 | i386_sigtramp_frame_cache (struct frame_info *this_frame, void **this_cache) |
| 1478 | { |
| 1479 | struct i386_frame_cache *cache; |
| 1480 | struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (this_frame)); |
| 1481 | CORE_ADDR addr; |
| 1482 | gdb_byte buf[4]; |
| 1483 | |
| 1484 | if (*this_cache) |
| 1485 | return *this_cache; |
| 1486 | |
| 1487 | cache = i386_alloc_frame_cache (); |
| 1488 | |
| 1489 | get_frame_register (this_frame, I386_ESP_REGNUM, buf); |
| 1490 | cache->base = extract_unsigned_integer (buf, 4) - 4; |
| 1491 | |
| 1492 | addr = tdep->sigcontext_addr (this_frame); |
| 1493 | if (tdep->sc_reg_offset) |
| 1494 | { |
| 1495 | int i; |
| 1496 | |
| 1497 | gdb_assert (tdep->sc_num_regs <= I386_NUM_SAVED_REGS); |
| 1498 | |
| 1499 | for (i = 0; i < tdep->sc_num_regs; i++) |
| 1500 | if (tdep->sc_reg_offset[i] != -1) |
| 1501 | cache->saved_regs[i] = addr + tdep->sc_reg_offset[i]; |
| 1502 | } |
| 1503 | else |
| 1504 | { |
| 1505 | cache->saved_regs[I386_EIP_REGNUM] = addr + tdep->sc_pc_offset; |
| 1506 | cache->saved_regs[I386_ESP_REGNUM] = addr + tdep->sc_sp_offset; |
| 1507 | } |
| 1508 | |
| 1509 | *this_cache = cache; |
| 1510 | return cache; |
| 1511 | } |
| 1512 | |
| 1513 | static void |
| 1514 | i386_sigtramp_frame_this_id (struct frame_info *this_frame, void **this_cache, |
| 1515 | struct frame_id *this_id) |
| 1516 | { |
| 1517 | struct i386_frame_cache *cache = |
| 1518 | i386_sigtramp_frame_cache (this_frame, this_cache); |
| 1519 | |
| 1520 | /* See the end of i386_push_dummy_call. */ |
| 1521 | (*this_id) = frame_id_build (cache->base + 8, get_frame_pc (this_frame)); |
| 1522 | } |
| 1523 | |
| 1524 | static struct value * |
| 1525 | i386_sigtramp_frame_prev_register (struct frame_info *this_frame, |
| 1526 | void **this_cache, int regnum) |
| 1527 | { |
| 1528 | /* Make sure we've initialized the cache. */ |
| 1529 | i386_sigtramp_frame_cache (this_frame, this_cache); |
| 1530 | |
| 1531 | return i386_frame_prev_register (this_frame, this_cache, regnum); |
| 1532 | } |
| 1533 | |
| 1534 | static int |
| 1535 | i386_sigtramp_frame_sniffer (const struct frame_unwind *self, |
| 1536 | struct frame_info *this_frame, |
| 1537 | void **this_prologue_cache) |
| 1538 | { |
| 1539 | struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (this_frame)); |
| 1540 | |
| 1541 | /* We shouldn't even bother if we don't have a sigcontext_addr |
| 1542 | handler. */ |
| 1543 | if (tdep->sigcontext_addr == NULL) |
| 1544 | return 0; |
| 1545 | |
| 1546 | if (tdep->sigtramp_p != NULL) |
| 1547 | { |
| 1548 | if (tdep->sigtramp_p (this_frame)) |
| 1549 | return 1; |
| 1550 | } |
| 1551 | |
| 1552 | if (tdep->sigtramp_start != 0) |
| 1553 | { |
| 1554 | CORE_ADDR pc = get_frame_pc (this_frame); |
| 1555 | |
| 1556 | gdb_assert (tdep->sigtramp_end != 0); |
| 1557 | if (pc >= tdep->sigtramp_start && pc < tdep->sigtramp_end) |
| 1558 | return 1; |
| 1559 | } |
| 1560 | |
| 1561 | return 0; |
| 1562 | } |
| 1563 | |
| 1564 | static const struct frame_unwind i386_sigtramp_frame_unwind = |
| 1565 | { |
| 1566 | SIGTRAMP_FRAME, |
| 1567 | i386_sigtramp_frame_this_id, |
| 1568 | i386_sigtramp_frame_prev_register, |
| 1569 | NULL, |
| 1570 | i386_sigtramp_frame_sniffer |
| 1571 | }; |
| 1572 | \f |
| 1573 | |
| 1574 | static CORE_ADDR |
| 1575 | i386_frame_base_address (struct frame_info *this_frame, void **this_cache) |
| 1576 | { |
| 1577 | struct i386_frame_cache *cache = i386_frame_cache (this_frame, this_cache); |
| 1578 | |
| 1579 | return cache->base; |
| 1580 | } |
| 1581 | |
| 1582 | static const struct frame_base i386_frame_base = |
| 1583 | { |
| 1584 | &i386_frame_unwind, |
| 1585 | i386_frame_base_address, |
| 1586 | i386_frame_base_address, |
| 1587 | i386_frame_base_address |
| 1588 | }; |
| 1589 | |
| 1590 | static struct frame_id |
| 1591 | i386_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame) |
| 1592 | { |
| 1593 | CORE_ADDR fp; |
| 1594 | |
| 1595 | fp = get_frame_register_unsigned (this_frame, I386_EBP_REGNUM); |
| 1596 | |
| 1597 | /* See the end of i386_push_dummy_call. */ |
| 1598 | return frame_id_build (fp + 8, get_frame_pc (this_frame)); |
| 1599 | } |
| 1600 | \f |
| 1601 | |
| 1602 | /* Figure out where the longjmp will land. Slurp the args out of the |
| 1603 | stack. We expect the first arg to be a pointer to the jmp_buf |
| 1604 | structure from which we extract the address that we will land at. |
| 1605 | This address is copied into PC. This routine returns non-zero on |
| 1606 | success. */ |
| 1607 | |
| 1608 | static int |
| 1609 | i386_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc) |
| 1610 | { |
| 1611 | gdb_byte buf[4]; |
| 1612 | CORE_ADDR sp, jb_addr; |
| 1613 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 1614 | int jb_pc_offset = gdbarch_tdep (gdbarch)->jb_pc_offset; |
| 1615 | |
| 1616 | /* If JB_PC_OFFSET is -1, we have no way to find out where the |
| 1617 | longjmp will land. */ |
| 1618 | if (jb_pc_offset == -1) |
| 1619 | return 0; |
| 1620 | |
| 1621 | get_frame_register (frame, I386_ESP_REGNUM, buf); |
| 1622 | sp = extract_unsigned_integer (buf, 4); |
| 1623 | if (target_read_memory (sp + 4, buf, 4)) |
| 1624 | return 0; |
| 1625 | |
| 1626 | jb_addr = extract_unsigned_integer (buf, 4); |
| 1627 | if (target_read_memory (jb_addr + jb_pc_offset, buf, 4)) |
| 1628 | return 0; |
| 1629 | |
| 1630 | *pc = extract_unsigned_integer (buf, 4); |
| 1631 | return 1; |
| 1632 | } |
| 1633 | \f |
| 1634 | |
| 1635 | /* Check whether TYPE must be 16-byte-aligned when passed as a |
| 1636 | function argument. 16-byte vectors, _Decimal128 and structures or |
| 1637 | unions containing such types must be 16-byte-aligned; other |
| 1638 | arguments are 4-byte-aligned. */ |
| 1639 | |
| 1640 | static int |
| 1641 | i386_16_byte_align_p (struct type *type) |
| 1642 | { |
| 1643 | type = check_typedef (type); |
| 1644 | if ((TYPE_CODE (type) == TYPE_CODE_DECFLOAT |
| 1645 | || (TYPE_CODE (type) == TYPE_CODE_ARRAY && TYPE_VECTOR (type))) |
| 1646 | && TYPE_LENGTH (type) == 16) |
| 1647 | return 1; |
| 1648 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) |
| 1649 | return i386_16_byte_align_p (TYPE_TARGET_TYPE (type)); |
| 1650 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT |
| 1651 | || TYPE_CODE (type) == TYPE_CODE_UNION) |
| 1652 | { |
| 1653 | int i; |
| 1654 | for (i = 0; i < TYPE_NFIELDS (type); i++) |
| 1655 | { |
| 1656 | if (i386_16_byte_align_p (TYPE_FIELD_TYPE (type, i))) |
| 1657 | return 1; |
| 1658 | } |
| 1659 | } |
| 1660 | return 0; |
| 1661 | } |
| 1662 | |
| 1663 | static CORE_ADDR |
| 1664 | i386_push_dummy_call (struct gdbarch *gdbarch, struct value *function, |
| 1665 | struct regcache *regcache, CORE_ADDR bp_addr, int nargs, |
| 1666 | struct value **args, CORE_ADDR sp, int struct_return, |
| 1667 | CORE_ADDR struct_addr) |
| 1668 | { |
| 1669 | gdb_byte buf[4]; |
| 1670 | int i; |
| 1671 | int write_pass; |
| 1672 | int args_space = 0; |
| 1673 | |
| 1674 | /* Determine the total space required for arguments and struct |
| 1675 | return address in a first pass (allowing for 16-byte-aligned |
| 1676 | arguments), then push arguments in a second pass. */ |
| 1677 | |
| 1678 | for (write_pass = 0; write_pass < 2; write_pass++) |
| 1679 | { |
| 1680 | int args_space_used = 0; |
| 1681 | int have_16_byte_aligned_arg = 0; |
| 1682 | |
| 1683 | if (struct_return) |
| 1684 | { |
| 1685 | if (write_pass) |
| 1686 | { |
| 1687 | /* Push value address. */ |
| 1688 | store_unsigned_integer (buf, 4, struct_addr); |
| 1689 | write_memory (sp, buf, 4); |
| 1690 | args_space_used += 4; |
| 1691 | } |
| 1692 | else |
| 1693 | args_space += 4; |
| 1694 | } |
| 1695 | |
| 1696 | for (i = 0; i < nargs; i++) |
| 1697 | { |
| 1698 | int len = TYPE_LENGTH (value_enclosing_type (args[i])); |
| 1699 | |
| 1700 | if (write_pass) |
| 1701 | { |
| 1702 | if (i386_16_byte_align_p (value_enclosing_type (args[i]))) |
| 1703 | args_space_used = align_up (args_space_used, 16); |
| 1704 | |
| 1705 | write_memory (sp + args_space_used, |
| 1706 | value_contents_all (args[i]), len); |
| 1707 | /* The System V ABI says that: |
| 1708 | |
| 1709 | "An argument's size is increased, if necessary, to make it a |
| 1710 | multiple of [32-bit] words. This may require tail padding, |
| 1711 | depending on the size of the argument." |
| 1712 | |
| 1713 | This makes sure the stack stays word-aligned. */ |
| 1714 | args_space_used += align_up (len, 4); |
| 1715 | } |
| 1716 | else |
| 1717 | { |
| 1718 | if (i386_16_byte_align_p (value_enclosing_type (args[i]))) |
| 1719 | { |
| 1720 | args_space = align_up (args_space, 16); |
| 1721 | have_16_byte_aligned_arg = 1; |
| 1722 | } |
| 1723 | args_space += align_up (len, 4); |
| 1724 | } |
| 1725 | } |
| 1726 | |
| 1727 | if (!write_pass) |
| 1728 | { |
| 1729 | if (have_16_byte_aligned_arg) |
| 1730 | args_space = align_up (args_space, 16); |
| 1731 | sp -= args_space; |
| 1732 | } |
| 1733 | } |
| 1734 | |
| 1735 | /* Store return address. */ |
| 1736 | sp -= 4; |
| 1737 | store_unsigned_integer (buf, 4, bp_addr); |
| 1738 | write_memory (sp, buf, 4); |
| 1739 | |
| 1740 | /* Finally, update the stack pointer... */ |
| 1741 | store_unsigned_integer (buf, 4, sp); |
| 1742 | regcache_cooked_write (regcache, I386_ESP_REGNUM, buf); |
| 1743 | |
| 1744 | /* ...and fake a frame pointer. */ |
| 1745 | regcache_cooked_write (regcache, I386_EBP_REGNUM, buf); |
| 1746 | |
| 1747 | /* MarkK wrote: This "+ 8" is all over the place: |
| 1748 | (i386_frame_this_id, i386_sigtramp_frame_this_id, |
| 1749 | i386_dummy_id). It's there, since all frame unwinders for |
| 1750 | a given target have to agree (within a certain margin) on the |
| 1751 | definition of the stack address of a frame. Otherwise frame id |
| 1752 | comparison might not work correctly. Since DWARF2/GCC uses the |
| 1753 | stack address *before* the function call as a frame's CFA. On |
| 1754 | the i386, when %ebp is used as a frame pointer, the offset |
| 1755 | between the contents %ebp and the CFA as defined by GCC. */ |
| 1756 | return sp + 8; |
| 1757 | } |
| 1758 | |
| 1759 | /* These registers are used for returning integers (and on some |
| 1760 | targets also for returning `struct' and `union' values when their |
| 1761 | size and alignment match an integer type). */ |
| 1762 | #define LOW_RETURN_REGNUM I386_EAX_REGNUM /* %eax */ |
| 1763 | #define HIGH_RETURN_REGNUM I386_EDX_REGNUM /* %edx */ |
| 1764 | |
| 1765 | /* Read, for architecture GDBARCH, a function return value of TYPE |
| 1766 | from REGCACHE, and copy that into VALBUF. */ |
| 1767 | |
| 1768 | static void |
| 1769 | i386_extract_return_value (struct gdbarch *gdbarch, struct type *type, |
| 1770 | struct regcache *regcache, gdb_byte *valbuf) |
| 1771 | { |
| 1772 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1773 | int len = TYPE_LENGTH (type); |
| 1774 | gdb_byte buf[I386_MAX_REGISTER_SIZE]; |
| 1775 | |
| 1776 | if (TYPE_CODE (type) == TYPE_CODE_FLT) |
| 1777 | { |
| 1778 | if (tdep->st0_regnum < 0) |
| 1779 | { |
| 1780 | warning (_("Cannot find floating-point return value.")); |
| 1781 | memset (valbuf, 0, len); |
| 1782 | return; |
| 1783 | } |
| 1784 | |
| 1785 | /* Floating-point return values can be found in %st(0). Convert |
| 1786 | its contents to the desired type. This is probably not |
| 1787 | exactly how it would happen on the target itself, but it is |
| 1788 | the best we can do. */ |
| 1789 | regcache_raw_read (regcache, I386_ST0_REGNUM, buf); |
| 1790 | convert_typed_floating (buf, builtin_type_i387_ext, valbuf, type); |
| 1791 | } |
| 1792 | else |
| 1793 | { |
| 1794 | int low_size = register_size (gdbarch, LOW_RETURN_REGNUM); |
| 1795 | int high_size = register_size (gdbarch, HIGH_RETURN_REGNUM); |
| 1796 | |
| 1797 | if (len <= low_size) |
| 1798 | { |
| 1799 | regcache_raw_read (regcache, LOW_RETURN_REGNUM, buf); |
| 1800 | memcpy (valbuf, buf, len); |
| 1801 | } |
| 1802 | else if (len <= (low_size + high_size)) |
| 1803 | { |
| 1804 | regcache_raw_read (regcache, LOW_RETURN_REGNUM, buf); |
| 1805 | memcpy (valbuf, buf, low_size); |
| 1806 | regcache_raw_read (regcache, HIGH_RETURN_REGNUM, buf); |
| 1807 | memcpy (valbuf + low_size, buf, len - low_size); |
| 1808 | } |
| 1809 | else |
| 1810 | internal_error (__FILE__, __LINE__, |
| 1811 | _("Cannot extract return value of %d bytes long."), len); |
| 1812 | } |
| 1813 | } |
| 1814 | |
| 1815 | /* Write, for architecture GDBARCH, a function return value of TYPE |
| 1816 | from VALBUF into REGCACHE. */ |
| 1817 | |
| 1818 | static void |
| 1819 | i386_store_return_value (struct gdbarch *gdbarch, struct type *type, |
| 1820 | struct regcache *regcache, const gdb_byte *valbuf) |
| 1821 | { |
| 1822 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1823 | int len = TYPE_LENGTH (type); |
| 1824 | |
| 1825 | if (TYPE_CODE (type) == TYPE_CODE_FLT) |
| 1826 | { |
| 1827 | ULONGEST fstat; |
| 1828 | gdb_byte buf[I386_MAX_REGISTER_SIZE]; |
| 1829 | |
| 1830 | if (tdep->st0_regnum < 0) |
| 1831 | { |
| 1832 | warning (_("Cannot set floating-point return value.")); |
| 1833 | return; |
| 1834 | } |
| 1835 | |
| 1836 | /* Returning floating-point values is a bit tricky. Apart from |
| 1837 | storing the return value in %st(0), we have to simulate the |
| 1838 | state of the FPU at function return point. */ |
| 1839 | |
| 1840 | /* Convert the value found in VALBUF to the extended |
| 1841 | floating-point format used by the FPU. This is probably |
| 1842 | not exactly how it would happen on the target itself, but |
| 1843 | it is the best we can do. */ |
| 1844 | convert_typed_floating (valbuf, type, buf, builtin_type_i387_ext); |
| 1845 | regcache_raw_write (regcache, I386_ST0_REGNUM, buf); |
| 1846 | |
| 1847 | /* Set the top of the floating-point register stack to 7. The |
| 1848 | actual value doesn't really matter, but 7 is what a normal |
| 1849 | function return would end up with if the program started out |
| 1850 | with a freshly initialized FPU. */ |
| 1851 | regcache_raw_read_unsigned (regcache, I387_FSTAT_REGNUM (tdep), &fstat); |
| 1852 | fstat |= (7 << 11); |
| 1853 | regcache_raw_write_unsigned (regcache, I387_FSTAT_REGNUM (tdep), fstat); |
| 1854 | |
| 1855 | /* Mark %st(1) through %st(7) as empty. Since we set the top of |
| 1856 | the floating-point register stack to 7, the appropriate value |
| 1857 | for the tag word is 0x3fff. */ |
| 1858 | regcache_raw_write_unsigned (regcache, I387_FTAG_REGNUM (tdep), 0x3fff); |
| 1859 | } |
| 1860 | else |
| 1861 | { |
| 1862 | int low_size = register_size (gdbarch, LOW_RETURN_REGNUM); |
| 1863 | int high_size = register_size (gdbarch, HIGH_RETURN_REGNUM); |
| 1864 | |
| 1865 | if (len <= low_size) |
| 1866 | regcache_raw_write_part (regcache, LOW_RETURN_REGNUM, 0, len, valbuf); |
| 1867 | else if (len <= (low_size + high_size)) |
| 1868 | { |
| 1869 | regcache_raw_write (regcache, LOW_RETURN_REGNUM, valbuf); |
| 1870 | regcache_raw_write_part (regcache, HIGH_RETURN_REGNUM, 0, |
| 1871 | len - low_size, valbuf + low_size); |
| 1872 | } |
| 1873 | else |
| 1874 | internal_error (__FILE__, __LINE__, |
| 1875 | _("Cannot store return value of %d bytes long."), len); |
| 1876 | } |
| 1877 | } |
| 1878 | \f |
| 1879 | |
| 1880 | /* This is the variable that is set with "set struct-convention", and |
| 1881 | its legitimate values. */ |
| 1882 | static const char default_struct_convention[] = "default"; |
| 1883 | static const char pcc_struct_convention[] = "pcc"; |
| 1884 | static const char reg_struct_convention[] = "reg"; |
| 1885 | static const char *valid_conventions[] = |
| 1886 | { |
| 1887 | default_struct_convention, |
| 1888 | pcc_struct_convention, |
| 1889 | reg_struct_convention, |
| 1890 | NULL |
| 1891 | }; |
| 1892 | static const char *struct_convention = default_struct_convention; |
| 1893 | |
| 1894 | /* Return non-zero if TYPE, which is assumed to be a structure, |
| 1895 | a union type, or an array type, should be returned in registers |
| 1896 | for architecture GDBARCH. */ |
| 1897 | |
| 1898 | static int |
| 1899 | i386_reg_struct_return_p (struct gdbarch *gdbarch, struct type *type) |
| 1900 | { |
| 1901 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1902 | enum type_code code = TYPE_CODE (type); |
| 1903 | int len = TYPE_LENGTH (type); |
| 1904 | |
| 1905 | gdb_assert (code == TYPE_CODE_STRUCT |
| 1906 | || code == TYPE_CODE_UNION |
| 1907 | || code == TYPE_CODE_ARRAY); |
| 1908 | |
| 1909 | if (struct_convention == pcc_struct_convention |
| 1910 | || (struct_convention == default_struct_convention |
| 1911 | && tdep->struct_return == pcc_struct_return)) |
| 1912 | return 0; |
| 1913 | |
| 1914 | /* Structures consisting of a single `float', `double' or 'long |
| 1915 | double' member are returned in %st(0). */ |
| 1916 | if (code == TYPE_CODE_STRUCT && TYPE_NFIELDS (type) == 1) |
| 1917 | { |
| 1918 | type = check_typedef (TYPE_FIELD_TYPE (type, 0)); |
| 1919 | if (TYPE_CODE (type) == TYPE_CODE_FLT) |
| 1920 | return (len == 4 || len == 8 || len == 12); |
| 1921 | } |
| 1922 | |
| 1923 | return (len == 1 || len == 2 || len == 4 || len == 8); |
| 1924 | } |
| 1925 | |
| 1926 | /* Determine, for architecture GDBARCH, how a return value of TYPE |
| 1927 | should be returned. If it is supposed to be returned in registers, |
| 1928 | and READBUF is non-zero, read the appropriate value from REGCACHE, |
| 1929 | and copy it into READBUF. If WRITEBUF is non-zero, write the value |
| 1930 | from WRITEBUF into REGCACHE. */ |
| 1931 | |
| 1932 | static enum return_value_convention |
| 1933 | i386_return_value (struct gdbarch *gdbarch, struct type *func_type, |
| 1934 | struct type *type, struct regcache *regcache, |
| 1935 | gdb_byte *readbuf, const gdb_byte *writebuf) |
| 1936 | { |
| 1937 | enum type_code code = TYPE_CODE (type); |
| 1938 | |
| 1939 | if (((code == TYPE_CODE_STRUCT |
| 1940 | || code == TYPE_CODE_UNION |
| 1941 | || code == TYPE_CODE_ARRAY) |
| 1942 | && !i386_reg_struct_return_p (gdbarch, type)) |
| 1943 | /* 128-bit decimal float uses the struct return convention. */ |
| 1944 | || (code == TYPE_CODE_DECFLOAT && TYPE_LENGTH (type) == 16)) |
| 1945 | { |
| 1946 | /* The System V ABI says that: |
| 1947 | |
| 1948 | "A function that returns a structure or union also sets %eax |
| 1949 | to the value of the original address of the caller's area |
| 1950 | before it returns. Thus when the caller receives control |
| 1951 | again, the address of the returned object resides in register |
| 1952 | %eax and can be used to access the object." |
| 1953 | |
| 1954 | So the ABI guarantees that we can always find the return |
| 1955 | value just after the function has returned. */ |
| 1956 | |
| 1957 | /* Note that the ABI doesn't mention functions returning arrays, |
| 1958 | which is something possible in certain languages such as Ada. |
| 1959 | In this case, the value is returned as if it was wrapped in |
| 1960 | a record, so the convention applied to records also applies |
| 1961 | to arrays. */ |
| 1962 | |
| 1963 | if (readbuf) |
| 1964 | { |
| 1965 | ULONGEST addr; |
| 1966 | |
| 1967 | regcache_raw_read_unsigned (regcache, I386_EAX_REGNUM, &addr); |
| 1968 | read_memory (addr, readbuf, TYPE_LENGTH (type)); |
| 1969 | } |
| 1970 | |
| 1971 | return RETURN_VALUE_ABI_RETURNS_ADDRESS; |
| 1972 | } |
| 1973 | |
| 1974 | /* This special case is for structures consisting of a single |
| 1975 | `float', `double' or 'long double' member. These structures are |
| 1976 | returned in %st(0). For these structures, we call ourselves |
| 1977 | recursively, changing TYPE into the type of the first member of |
| 1978 | the structure. Since that should work for all structures that |
| 1979 | have only one member, we don't bother to check the member's type |
| 1980 | here. */ |
| 1981 | if (code == TYPE_CODE_STRUCT && TYPE_NFIELDS (type) == 1) |
| 1982 | { |
| 1983 | type = check_typedef (TYPE_FIELD_TYPE (type, 0)); |
| 1984 | return i386_return_value (gdbarch, func_type, type, regcache, |
| 1985 | readbuf, writebuf); |
| 1986 | } |
| 1987 | |
| 1988 | if (readbuf) |
| 1989 | i386_extract_return_value (gdbarch, type, regcache, readbuf); |
| 1990 | if (writebuf) |
| 1991 | i386_store_return_value (gdbarch, type, regcache, writebuf); |
| 1992 | |
| 1993 | return RETURN_VALUE_REGISTER_CONVENTION; |
| 1994 | } |
| 1995 | \f |
| 1996 | |
| 1997 | /* Type for %eflags. */ |
| 1998 | struct type *i386_eflags_type; |
| 1999 | |
| 2000 | /* Type for %mxcsr. */ |
| 2001 | struct type *i386_mxcsr_type; |
| 2002 | |
| 2003 | /* Construct types for ISA-specific registers. */ |
| 2004 | static void |
| 2005 | i386_init_types (void) |
| 2006 | { |
| 2007 | struct type *type; |
| 2008 | |
| 2009 | type = init_flags_type ("builtin_type_i386_eflags", 4); |
| 2010 | append_flags_type_flag (type, 0, "CF"); |
| 2011 | append_flags_type_flag (type, 1, NULL); |
| 2012 | append_flags_type_flag (type, 2, "PF"); |
| 2013 | append_flags_type_flag (type, 4, "AF"); |
| 2014 | append_flags_type_flag (type, 6, "ZF"); |
| 2015 | append_flags_type_flag (type, 7, "SF"); |
| 2016 | append_flags_type_flag (type, 8, "TF"); |
| 2017 | append_flags_type_flag (type, 9, "IF"); |
| 2018 | append_flags_type_flag (type, 10, "DF"); |
| 2019 | append_flags_type_flag (type, 11, "OF"); |
| 2020 | append_flags_type_flag (type, 14, "NT"); |
| 2021 | append_flags_type_flag (type, 16, "RF"); |
| 2022 | append_flags_type_flag (type, 17, "VM"); |
| 2023 | append_flags_type_flag (type, 18, "AC"); |
| 2024 | append_flags_type_flag (type, 19, "VIF"); |
| 2025 | append_flags_type_flag (type, 20, "VIP"); |
| 2026 | append_flags_type_flag (type, 21, "ID"); |
| 2027 | i386_eflags_type = type; |
| 2028 | |
| 2029 | type = init_flags_type ("builtin_type_i386_mxcsr", 4); |
| 2030 | append_flags_type_flag (type, 0, "IE"); |
| 2031 | append_flags_type_flag (type, 1, "DE"); |
| 2032 | append_flags_type_flag (type, 2, "ZE"); |
| 2033 | append_flags_type_flag (type, 3, "OE"); |
| 2034 | append_flags_type_flag (type, 4, "UE"); |
| 2035 | append_flags_type_flag (type, 5, "PE"); |
| 2036 | append_flags_type_flag (type, 6, "DAZ"); |
| 2037 | append_flags_type_flag (type, 7, "IM"); |
| 2038 | append_flags_type_flag (type, 8, "DM"); |
| 2039 | append_flags_type_flag (type, 9, "ZM"); |
| 2040 | append_flags_type_flag (type, 10, "OM"); |
| 2041 | append_flags_type_flag (type, 11, "UM"); |
| 2042 | append_flags_type_flag (type, 12, "PM"); |
| 2043 | append_flags_type_flag (type, 15, "FZ"); |
| 2044 | i386_mxcsr_type = type; |
| 2045 | } |
| 2046 | |
| 2047 | /* Construct vector type for MMX registers. */ |
| 2048 | struct type * |
| 2049 | i386_mmx_type (struct gdbarch *gdbarch) |
| 2050 | { |
| 2051 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 2052 | |
| 2053 | if (!tdep->i386_mmx_type) |
| 2054 | { |
| 2055 | /* The type we're building is this: */ |
| 2056 | #if 0 |
| 2057 | union __gdb_builtin_type_vec64i |
| 2058 | { |
| 2059 | int64_t uint64; |
| 2060 | int32_t v2_int32[2]; |
| 2061 | int16_t v4_int16[4]; |
| 2062 | int8_t v8_int8[8]; |
| 2063 | }; |
| 2064 | #endif |
| 2065 | |
| 2066 | struct type *t; |
| 2067 | |
| 2068 | t = init_composite_type ("__gdb_builtin_type_vec64i", TYPE_CODE_UNION); |
| 2069 | append_composite_type_field (t, "uint64", builtin_type_int64); |
| 2070 | append_composite_type_field (t, "v2_int32", |
| 2071 | init_vector_type (builtin_type_int32, 2)); |
| 2072 | append_composite_type_field (t, "v4_int16", |
| 2073 | init_vector_type (builtin_type_int16, 4)); |
| 2074 | append_composite_type_field (t, "v8_int8", |
| 2075 | init_vector_type (builtin_type_int8, 8)); |
| 2076 | |
| 2077 | TYPE_VECTOR (t) = 1; |
| 2078 | TYPE_NAME (t) = "builtin_type_vec64i"; |
| 2079 | tdep->i386_mmx_type = t; |
| 2080 | } |
| 2081 | |
| 2082 | return tdep->i386_mmx_type; |
| 2083 | } |
| 2084 | |
| 2085 | struct type * |
| 2086 | i386_sse_type (struct gdbarch *gdbarch) |
| 2087 | { |
| 2088 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 2089 | |
| 2090 | if (!tdep->i386_sse_type) |
| 2091 | { |
| 2092 | /* The type we're building is this: */ |
| 2093 | #if 0 |
| 2094 | union __gdb_builtin_type_vec128i |
| 2095 | { |
| 2096 | int128_t uint128; |
| 2097 | int64_t v2_int64[2]; |
| 2098 | int32_t v4_int32[4]; |
| 2099 | int16_t v8_int16[8]; |
| 2100 | int8_t v16_int8[16]; |
| 2101 | double v2_double[2]; |
| 2102 | float v4_float[4]; |
| 2103 | }; |
| 2104 | #endif |
| 2105 | |
| 2106 | struct type *t; |
| 2107 | |
| 2108 | t = init_composite_type ("__gdb_builtin_type_vec128i", TYPE_CODE_UNION); |
| 2109 | append_composite_type_field (t, "v4_float", |
| 2110 | init_vector_type (builtin_type (gdbarch) |
| 2111 | ->builtin_float, 4)); |
| 2112 | append_composite_type_field (t, "v2_double", |
| 2113 | init_vector_type (builtin_type (gdbarch) |
| 2114 | ->builtin_double, 2)); |
| 2115 | append_composite_type_field (t, "v16_int8", |
| 2116 | init_vector_type (builtin_type_int8, 16)); |
| 2117 | append_composite_type_field (t, "v8_int16", |
| 2118 | init_vector_type (builtin_type_int16, 8)); |
| 2119 | append_composite_type_field (t, "v4_int32", |
| 2120 | init_vector_type (builtin_type_int32, 4)); |
| 2121 | append_composite_type_field (t, "v2_int64", |
| 2122 | init_vector_type (builtin_type_int64, 2)); |
| 2123 | append_composite_type_field (t, "uint128", builtin_type_int128); |
| 2124 | |
| 2125 | TYPE_VECTOR (t) = 1; |
| 2126 | TYPE_NAME (t) = "builtin_type_vec128i"; |
| 2127 | tdep->i386_sse_type = t; |
| 2128 | } |
| 2129 | |
| 2130 | return tdep->i386_sse_type; |
| 2131 | } |
| 2132 | |
| 2133 | /* Return the GDB type object for the "standard" data type of data in |
| 2134 | register REGNUM. Perhaps %esi and %edi should go here, but |
| 2135 | potentially they could be used for things other than address. */ |
| 2136 | |
| 2137 | static struct type * |
| 2138 | i386_register_type (struct gdbarch *gdbarch, int regnum) |
| 2139 | { |
| 2140 | if (regnum == I386_EIP_REGNUM) |
| 2141 | return builtin_type (gdbarch)->builtin_func_ptr; |
| 2142 | |
| 2143 | if (regnum == I386_EFLAGS_REGNUM) |
| 2144 | return i386_eflags_type; |
| 2145 | |
| 2146 | if (regnum == I386_EBP_REGNUM || regnum == I386_ESP_REGNUM) |
| 2147 | return builtin_type (gdbarch)->builtin_data_ptr; |
| 2148 | |
| 2149 | if (i386_fp_regnum_p (gdbarch, regnum)) |
| 2150 | return builtin_type_i387_ext; |
| 2151 | |
| 2152 | if (i386_mmx_regnum_p (gdbarch, regnum)) |
| 2153 | return i386_mmx_type (gdbarch); |
| 2154 | |
| 2155 | if (i386_sse_regnum_p (gdbarch, regnum)) |
| 2156 | return i386_sse_type (gdbarch); |
| 2157 | |
| 2158 | if (regnum == I387_MXCSR_REGNUM (gdbarch_tdep (gdbarch))) |
| 2159 | return i386_mxcsr_type; |
| 2160 | |
| 2161 | return builtin_type (gdbarch)->builtin_int; |
| 2162 | } |
| 2163 | |
| 2164 | /* Map a cooked register onto a raw register or memory. For the i386, |
| 2165 | the MMX registers need to be mapped onto floating point registers. */ |
| 2166 | |
| 2167 | static int |
| 2168 | i386_mmx_regnum_to_fp_regnum (struct regcache *regcache, int regnum) |
| 2169 | { |
| 2170 | struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache)); |
| 2171 | int mmxreg, fpreg; |
| 2172 | ULONGEST fstat; |
| 2173 | int tos; |
| 2174 | |
| 2175 | mmxreg = regnum - tdep->mm0_regnum; |
| 2176 | regcache_raw_read_unsigned (regcache, I387_FSTAT_REGNUM (tdep), &fstat); |
| 2177 | tos = (fstat >> 11) & 0x7; |
| 2178 | fpreg = (mmxreg + tos) % 8; |
| 2179 | |
| 2180 | return (I387_ST0_REGNUM (tdep) + fpreg); |
| 2181 | } |
| 2182 | |
| 2183 | static void |
| 2184 | i386_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache, |
| 2185 | int regnum, gdb_byte *buf) |
| 2186 | { |
| 2187 | if (i386_mmx_regnum_p (gdbarch, regnum)) |
| 2188 | { |
| 2189 | gdb_byte mmx_buf[MAX_REGISTER_SIZE]; |
| 2190 | int fpnum = i386_mmx_regnum_to_fp_regnum (regcache, regnum); |
| 2191 | |
| 2192 | /* Extract (always little endian). */ |
| 2193 | regcache_raw_read (regcache, fpnum, mmx_buf); |
| 2194 | memcpy (buf, mmx_buf, register_size (gdbarch, regnum)); |
| 2195 | } |
| 2196 | else |
| 2197 | regcache_raw_read (regcache, regnum, buf); |
| 2198 | } |
| 2199 | |
| 2200 | static void |
| 2201 | i386_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache, |
| 2202 | int regnum, const gdb_byte *buf) |
| 2203 | { |
| 2204 | if (i386_mmx_regnum_p (gdbarch, regnum)) |
| 2205 | { |
| 2206 | gdb_byte mmx_buf[MAX_REGISTER_SIZE]; |
| 2207 | int fpnum = i386_mmx_regnum_to_fp_regnum (regcache, regnum); |
| 2208 | |
| 2209 | /* Read ... */ |
| 2210 | regcache_raw_read (regcache, fpnum, mmx_buf); |
| 2211 | /* ... Modify ... (always little endian). */ |
| 2212 | memcpy (mmx_buf, buf, register_size (gdbarch, regnum)); |
| 2213 | /* ... Write. */ |
| 2214 | regcache_raw_write (regcache, fpnum, mmx_buf); |
| 2215 | } |
| 2216 | else |
| 2217 | regcache_raw_write (regcache, regnum, buf); |
| 2218 | } |
| 2219 | \f |
| 2220 | |
| 2221 | /* Return the register number of the register allocated by GCC after |
| 2222 | REGNUM, or -1 if there is no such register. */ |
| 2223 | |
| 2224 | static int |
| 2225 | i386_next_regnum (int regnum) |
| 2226 | { |
| 2227 | /* GCC allocates the registers in the order: |
| 2228 | |
| 2229 | %eax, %edx, %ecx, %ebx, %esi, %edi, %ebp, %esp, ... |
| 2230 | |
| 2231 | Since storing a variable in %esp doesn't make any sense we return |
| 2232 | -1 for %ebp and for %esp itself. */ |
| 2233 | static int next_regnum[] = |
| 2234 | { |
| 2235 | I386_EDX_REGNUM, /* Slot for %eax. */ |
| 2236 | I386_EBX_REGNUM, /* Slot for %ecx. */ |
| 2237 | I386_ECX_REGNUM, /* Slot for %edx. */ |
| 2238 | I386_ESI_REGNUM, /* Slot for %ebx. */ |
| 2239 | -1, -1, /* Slots for %esp and %ebp. */ |
| 2240 | I386_EDI_REGNUM, /* Slot for %esi. */ |
| 2241 | I386_EBP_REGNUM /* Slot for %edi. */ |
| 2242 | }; |
| 2243 | |
| 2244 | if (regnum >= 0 && regnum < sizeof (next_regnum) / sizeof (next_regnum[0])) |
| 2245 | return next_regnum[regnum]; |
| 2246 | |
| 2247 | return -1; |
| 2248 | } |
| 2249 | |
| 2250 | /* Return nonzero if a value of type TYPE stored in register REGNUM |
| 2251 | needs any special handling. */ |
| 2252 | |
| 2253 | static int |
| 2254 | i386_convert_register_p (struct gdbarch *gdbarch, int regnum, struct type *type) |
| 2255 | { |
| 2256 | int len = TYPE_LENGTH (type); |
| 2257 | |
| 2258 | /* Values may be spread across multiple registers. Most debugging |
| 2259 | formats aren't expressive enough to specify the locations, so |
| 2260 | some heuristics is involved. Right now we only handle types that |
| 2261 | have a length that is a multiple of the word size, since GCC |
| 2262 | doesn't seem to put any other types into registers. */ |
| 2263 | if (len > 4 && len % 4 == 0) |
| 2264 | { |
| 2265 | int last_regnum = regnum; |
| 2266 | |
| 2267 | while (len > 4) |
| 2268 | { |
| 2269 | last_regnum = i386_next_regnum (last_regnum); |
| 2270 | len -= 4; |
| 2271 | } |
| 2272 | |
| 2273 | if (last_regnum != -1) |
| 2274 | return 1; |
| 2275 | } |
| 2276 | |
| 2277 | return i387_convert_register_p (gdbarch, regnum, type); |
| 2278 | } |
| 2279 | |
| 2280 | /* Read a value of type TYPE from register REGNUM in frame FRAME, and |
| 2281 | return its contents in TO. */ |
| 2282 | |
| 2283 | static void |
| 2284 | i386_register_to_value (struct frame_info *frame, int regnum, |
| 2285 | struct type *type, gdb_byte *to) |
| 2286 | { |
| 2287 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 2288 | int len = TYPE_LENGTH (type); |
| 2289 | |
| 2290 | /* FIXME: kettenis/20030609: What should we do if REGNUM isn't |
| 2291 | available in FRAME (i.e. if it wasn't saved)? */ |
| 2292 | |
| 2293 | if (i386_fp_regnum_p (gdbarch, regnum)) |
| 2294 | { |
| 2295 | i387_register_to_value (frame, regnum, type, to); |
| 2296 | return; |
| 2297 | } |
| 2298 | |
| 2299 | /* Read a value spread across multiple registers. */ |
| 2300 | |
| 2301 | gdb_assert (len > 4 && len % 4 == 0); |
| 2302 | |
| 2303 | while (len > 0) |
| 2304 | { |
| 2305 | gdb_assert (regnum != -1); |
| 2306 | gdb_assert (register_size (gdbarch, regnum) == 4); |
| 2307 | |
| 2308 | get_frame_register (frame, regnum, to); |
| 2309 | regnum = i386_next_regnum (regnum); |
| 2310 | len -= 4; |
| 2311 | to += 4; |
| 2312 | } |
| 2313 | } |
| 2314 | |
| 2315 | /* Write the contents FROM of a value of type TYPE into register |
| 2316 | REGNUM in frame FRAME. */ |
| 2317 | |
| 2318 | static void |
| 2319 | i386_value_to_register (struct frame_info *frame, int regnum, |
| 2320 | struct type *type, const gdb_byte *from) |
| 2321 | { |
| 2322 | int len = TYPE_LENGTH (type); |
| 2323 | |
| 2324 | if (i386_fp_regnum_p (get_frame_arch (frame), regnum)) |
| 2325 | { |
| 2326 | i387_value_to_register (frame, regnum, type, from); |
| 2327 | return; |
| 2328 | } |
| 2329 | |
| 2330 | /* Write a value spread across multiple registers. */ |
| 2331 | |
| 2332 | gdb_assert (len > 4 && len % 4 == 0); |
| 2333 | |
| 2334 | while (len > 0) |
| 2335 | { |
| 2336 | gdb_assert (regnum != -1); |
| 2337 | gdb_assert (register_size (get_frame_arch (frame), regnum) == 4); |
| 2338 | |
| 2339 | put_frame_register (frame, regnum, from); |
| 2340 | regnum = i386_next_regnum (regnum); |
| 2341 | len -= 4; |
| 2342 | from += 4; |
| 2343 | } |
| 2344 | } |
| 2345 | \f |
| 2346 | /* Supply register REGNUM from the buffer specified by GREGS and LEN |
| 2347 | in the general-purpose register set REGSET to register cache |
| 2348 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ |
| 2349 | |
| 2350 | void |
| 2351 | i386_supply_gregset (const struct regset *regset, struct regcache *regcache, |
| 2352 | int regnum, const void *gregs, size_t len) |
| 2353 | { |
| 2354 | const struct gdbarch_tdep *tdep = gdbarch_tdep (regset->arch); |
| 2355 | const gdb_byte *regs = gregs; |
| 2356 | int i; |
| 2357 | |
| 2358 | gdb_assert (len == tdep->sizeof_gregset); |
| 2359 | |
| 2360 | for (i = 0; i < tdep->gregset_num_regs; i++) |
| 2361 | { |
| 2362 | if ((regnum == i || regnum == -1) |
| 2363 | && tdep->gregset_reg_offset[i] != -1) |
| 2364 | regcache_raw_supply (regcache, i, regs + tdep->gregset_reg_offset[i]); |
| 2365 | } |
| 2366 | } |
| 2367 | |
| 2368 | /* Collect register REGNUM from the register cache REGCACHE and store |
| 2369 | it in the buffer specified by GREGS and LEN as described by the |
| 2370 | general-purpose register set REGSET. If REGNUM is -1, do this for |
| 2371 | all registers in REGSET. */ |
| 2372 | |
| 2373 | void |
| 2374 | i386_collect_gregset (const struct regset *regset, |
| 2375 | const struct regcache *regcache, |
| 2376 | int regnum, void *gregs, size_t len) |
| 2377 | { |
| 2378 | const struct gdbarch_tdep *tdep = gdbarch_tdep (regset->arch); |
| 2379 | gdb_byte *regs = gregs; |
| 2380 | int i; |
| 2381 | |
| 2382 | gdb_assert (len == tdep->sizeof_gregset); |
| 2383 | |
| 2384 | for (i = 0; i < tdep->gregset_num_regs; i++) |
| 2385 | { |
| 2386 | if ((regnum == i || regnum == -1) |
| 2387 | && tdep->gregset_reg_offset[i] != -1) |
| 2388 | regcache_raw_collect (regcache, i, regs + tdep->gregset_reg_offset[i]); |
| 2389 | } |
| 2390 | } |
| 2391 | |
| 2392 | /* Supply register REGNUM from the buffer specified by FPREGS and LEN |
| 2393 | in the floating-point register set REGSET to register cache |
| 2394 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ |
| 2395 | |
| 2396 | static void |
| 2397 | i386_supply_fpregset (const struct regset *regset, struct regcache *regcache, |
| 2398 | int regnum, const void *fpregs, size_t len) |
| 2399 | { |
| 2400 | const struct gdbarch_tdep *tdep = gdbarch_tdep (regset->arch); |
| 2401 | |
| 2402 | if (len == I387_SIZEOF_FXSAVE) |
| 2403 | { |
| 2404 | i387_supply_fxsave (regcache, regnum, fpregs); |
| 2405 | return; |
| 2406 | } |
| 2407 | |
| 2408 | gdb_assert (len == tdep->sizeof_fpregset); |
| 2409 | i387_supply_fsave (regcache, regnum, fpregs); |
| 2410 | } |
| 2411 | |
| 2412 | /* Collect register REGNUM from the register cache REGCACHE and store |
| 2413 | it in the buffer specified by FPREGS and LEN as described by the |
| 2414 | floating-point register set REGSET. If REGNUM is -1, do this for |
| 2415 | all registers in REGSET. */ |
| 2416 | |
| 2417 | static void |
| 2418 | i386_collect_fpregset (const struct regset *regset, |
| 2419 | const struct regcache *regcache, |
| 2420 | int regnum, void *fpregs, size_t len) |
| 2421 | { |
| 2422 | const struct gdbarch_tdep *tdep = gdbarch_tdep (regset->arch); |
| 2423 | |
| 2424 | if (len == I387_SIZEOF_FXSAVE) |
| 2425 | { |
| 2426 | i387_collect_fxsave (regcache, regnum, fpregs); |
| 2427 | return; |
| 2428 | } |
| 2429 | |
| 2430 | gdb_assert (len == tdep->sizeof_fpregset); |
| 2431 | i387_collect_fsave (regcache, regnum, fpregs); |
| 2432 | } |
| 2433 | |
| 2434 | /* Return the appropriate register set for the core section identified |
| 2435 | by SECT_NAME and SECT_SIZE. */ |
| 2436 | |
| 2437 | const struct regset * |
| 2438 | i386_regset_from_core_section (struct gdbarch *gdbarch, |
| 2439 | const char *sect_name, size_t sect_size) |
| 2440 | { |
| 2441 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 2442 | |
| 2443 | if (strcmp (sect_name, ".reg") == 0 && sect_size == tdep->sizeof_gregset) |
| 2444 | { |
| 2445 | if (tdep->gregset == NULL) |
| 2446 | tdep->gregset = regset_alloc (gdbarch, i386_supply_gregset, |
| 2447 | i386_collect_gregset); |
| 2448 | return tdep->gregset; |
| 2449 | } |
| 2450 | |
| 2451 | if ((strcmp (sect_name, ".reg2") == 0 && sect_size == tdep->sizeof_fpregset) |
| 2452 | || (strcmp (sect_name, ".reg-xfp") == 0 |
| 2453 | && sect_size == I387_SIZEOF_FXSAVE)) |
| 2454 | { |
| 2455 | if (tdep->fpregset == NULL) |
| 2456 | tdep->fpregset = regset_alloc (gdbarch, i386_supply_fpregset, |
| 2457 | i386_collect_fpregset); |
| 2458 | return tdep->fpregset; |
| 2459 | } |
| 2460 | |
| 2461 | return NULL; |
| 2462 | } |
| 2463 | \f |
| 2464 | |
| 2465 | /* Stuff for WIN32 PE style DLL's but is pretty generic really. */ |
| 2466 | |
| 2467 | CORE_ADDR |
| 2468 | i386_pe_skip_trampoline_code (CORE_ADDR pc, char *name) |
| 2469 | { |
| 2470 | if (pc && read_memory_unsigned_integer (pc, 2) == 0x25ff) /* jmp *(dest) */ |
| 2471 | { |
| 2472 | unsigned long indirect = read_memory_unsigned_integer (pc + 2, 4); |
| 2473 | struct minimal_symbol *indsym = |
| 2474 | indirect ? lookup_minimal_symbol_by_pc (indirect) : 0; |
| 2475 | char *symname = indsym ? SYMBOL_LINKAGE_NAME (indsym) : 0; |
| 2476 | |
| 2477 | if (symname) |
| 2478 | { |
| 2479 | if (strncmp (symname, "__imp_", 6) == 0 |
| 2480 | || strncmp (symname, "_imp_", 5) == 0) |
| 2481 | return name ? 1 : read_memory_unsigned_integer (indirect, 4); |
| 2482 | } |
| 2483 | } |
| 2484 | return 0; /* Not a trampoline. */ |
| 2485 | } |
| 2486 | \f |
| 2487 | |
| 2488 | /* Return whether the THIS_FRAME corresponds to a sigtramp |
| 2489 | routine. */ |
| 2490 | |
| 2491 | int |
| 2492 | i386_sigtramp_p (struct frame_info *this_frame) |
| 2493 | { |
| 2494 | CORE_ADDR pc = get_frame_pc (this_frame); |
| 2495 | char *name; |
| 2496 | |
| 2497 | find_pc_partial_function (pc, &name, NULL, NULL); |
| 2498 | return (name && strcmp ("_sigtramp", name) == 0); |
| 2499 | } |
| 2500 | \f |
| 2501 | |
| 2502 | /* We have two flavours of disassembly. The machinery on this page |
| 2503 | deals with switching between those. */ |
| 2504 | |
| 2505 | static int |
| 2506 | i386_print_insn (bfd_vma pc, struct disassemble_info *info) |
| 2507 | { |
| 2508 | gdb_assert (disassembly_flavor == att_flavor |
| 2509 | || disassembly_flavor == intel_flavor); |
| 2510 | |
| 2511 | /* FIXME: kettenis/20020915: Until disassembler_options is properly |
| 2512 | constified, cast to prevent a compiler warning. */ |
| 2513 | info->disassembler_options = (char *) disassembly_flavor; |
| 2514 | |
| 2515 | return print_insn_i386 (pc, info); |
| 2516 | } |
| 2517 | \f |
| 2518 | |
| 2519 | /* There are a few i386 architecture variants that differ only |
| 2520 | slightly from the generic i386 target. For now, we don't give them |
| 2521 | their own source file, but include them here. As a consequence, |
| 2522 | they'll always be included. */ |
| 2523 | |
| 2524 | /* System V Release 4 (SVR4). */ |
| 2525 | |
| 2526 | /* Return whether THIS_FRAME corresponds to a SVR4 sigtramp |
| 2527 | routine. */ |
| 2528 | |
| 2529 | static int |
| 2530 | i386_svr4_sigtramp_p (struct frame_info *this_frame) |
| 2531 | { |
| 2532 | CORE_ADDR pc = get_frame_pc (this_frame); |
| 2533 | char *name; |
| 2534 | |
| 2535 | /* UnixWare uses _sigacthandler. The origin of the other symbols is |
| 2536 | currently unknown. */ |
| 2537 | find_pc_partial_function (pc, &name, NULL, NULL); |
| 2538 | return (name && (strcmp ("_sigreturn", name) == 0 |
| 2539 | || strcmp ("_sigacthandler", name) == 0 |
| 2540 | || strcmp ("sigvechandler", name) == 0)); |
| 2541 | } |
| 2542 | |
| 2543 | /* Assuming THIS_FRAME is for a SVR4 sigtramp routine, return the |
| 2544 | address of the associated sigcontext (ucontext) structure. */ |
| 2545 | |
| 2546 | static CORE_ADDR |
| 2547 | i386_svr4_sigcontext_addr (struct frame_info *this_frame) |
| 2548 | { |
| 2549 | gdb_byte buf[4]; |
| 2550 | CORE_ADDR sp; |
| 2551 | |
| 2552 | get_frame_register (this_frame, I386_ESP_REGNUM, buf); |
| 2553 | sp = extract_unsigned_integer (buf, 4); |
| 2554 | |
| 2555 | return read_memory_unsigned_integer (sp + 8, 4); |
| 2556 | } |
| 2557 | \f |
| 2558 | |
| 2559 | /* Generic ELF. */ |
| 2560 | |
| 2561 | void |
| 2562 | i386_elf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 2563 | { |
| 2564 | /* We typically use stabs-in-ELF with the SVR4 register numbering. */ |
| 2565 | set_gdbarch_stab_reg_to_regnum (gdbarch, i386_svr4_reg_to_regnum); |
| 2566 | } |
| 2567 | |
| 2568 | /* System V Release 4 (SVR4). */ |
| 2569 | |
| 2570 | void |
| 2571 | i386_svr4_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 2572 | { |
| 2573 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 2574 | |
| 2575 | /* System V Release 4 uses ELF. */ |
| 2576 | i386_elf_init_abi (info, gdbarch); |
| 2577 | |
| 2578 | /* System V Release 4 has shared libraries. */ |
| 2579 | set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); |
| 2580 | |
| 2581 | tdep->sigtramp_p = i386_svr4_sigtramp_p; |
| 2582 | tdep->sigcontext_addr = i386_svr4_sigcontext_addr; |
| 2583 | tdep->sc_pc_offset = 36 + 14 * 4; |
| 2584 | tdep->sc_sp_offset = 36 + 17 * 4; |
| 2585 | |
| 2586 | tdep->jb_pc_offset = 20; |
| 2587 | } |
| 2588 | |
| 2589 | /* DJGPP. */ |
| 2590 | |
| 2591 | static void |
| 2592 | i386_go32_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 2593 | { |
| 2594 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 2595 | |
| 2596 | /* DJGPP doesn't have any special frames for signal handlers. */ |
| 2597 | tdep->sigtramp_p = NULL; |
| 2598 | |
| 2599 | tdep->jb_pc_offset = 36; |
| 2600 | |
| 2601 | /* DJGPP does not support the SSE registers. */ |
| 2602 | tdep->num_xmm_regs = 0; |
| 2603 | set_gdbarch_num_regs (gdbarch, I386_NUM_GREGS + I386_NUM_FREGS); |
| 2604 | } |
| 2605 | \f |
| 2606 | |
| 2607 | /* i386 register groups. In addition to the normal groups, add "mmx" |
| 2608 | and "sse". */ |
| 2609 | |
| 2610 | static struct reggroup *i386_sse_reggroup; |
| 2611 | static struct reggroup *i386_mmx_reggroup; |
| 2612 | |
| 2613 | static void |
| 2614 | i386_init_reggroups (void) |
| 2615 | { |
| 2616 | i386_sse_reggroup = reggroup_new ("sse", USER_REGGROUP); |
| 2617 | i386_mmx_reggroup = reggroup_new ("mmx", USER_REGGROUP); |
| 2618 | } |
| 2619 | |
| 2620 | static void |
| 2621 | i386_add_reggroups (struct gdbarch *gdbarch) |
| 2622 | { |
| 2623 | reggroup_add (gdbarch, i386_sse_reggroup); |
| 2624 | reggroup_add (gdbarch, i386_mmx_reggroup); |
| 2625 | reggroup_add (gdbarch, general_reggroup); |
| 2626 | reggroup_add (gdbarch, float_reggroup); |
| 2627 | reggroup_add (gdbarch, all_reggroup); |
| 2628 | reggroup_add (gdbarch, save_reggroup); |
| 2629 | reggroup_add (gdbarch, restore_reggroup); |
| 2630 | reggroup_add (gdbarch, vector_reggroup); |
| 2631 | reggroup_add (gdbarch, system_reggroup); |
| 2632 | } |
| 2633 | |
| 2634 | int |
| 2635 | i386_register_reggroup_p (struct gdbarch *gdbarch, int regnum, |
| 2636 | struct reggroup *group) |
| 2637 | { |
| 2638 | int sse_regnum_p = (i386_sse_regnum_p (gdbarch, regnum) |
| 2639 | || i386_mxcsr_regnum_p (gdbarch, regnum)); |
| 2640 | int fp_regnum_p = (i386_fp_regnum_p (gdbarch, regnum) |
| 2641 | || i386_fpc_regnum_p (gdbarch, regnum)); |
| 2642 | int mmx_regnum_p = (i386_mmx_regnum_p (gdbarch, regnum)); |
| 2643 | |
| 2644 | if (group == i386_mmx_reggroup) |
| 2645 | return mmx_regnum_p; |
| 2646 | if (group == i386_sse_reggroup) |
| 2647 | return sse_regnum_p; |
| 2648 | if (group == vector_reggroup) |
| 2649 | return (mmx_regnum_p || sse_regnum_p); |
| 2650 | if (group == float_reggroup) |
| 2651 | return fp_regnum_p; |
| 2652 | if (group == general_reggroup) |
| 2653 | return (!fp_regnum_p && !mmx_regnum_p && !sse_regnum_p); |
| 2654 | |
| 2655 | return default_register_reggroup_p (gdbarch, regnum, group); |
| 2656 | } |
| 2657 | \f |
| 2658 | |
| 2659 | /* Get the ARGIth function argument for the current function. */ |
| 2660 | |
| 2661 | static CORE_ADDR |
| 2662 | i386_fetch_pointer_argument (struct frame_info *frame, int argi, |
| 2663 | struct type *type) |
| 2664 | { |
| 2665 | CORE_ADDR sp = get_frame_register_unsigned (frame, I386_ESP_REGNUM); |
| 2666 | return read_memory_unsigned_integer (sp + (4 * (argi + 1)), 4); |
| 2667 | } |
| 2668 | |
| 2669 | static void |
| 2670 | i386_skip_permanent_breakpoint (struct regcache *regcache) |
| 2671 | { |
| 2672 | CORE_ADDR current_pc = regcache_read_pc (regcache); |
| 2673 | |
| 2674 | /* On i386, breakpoint is exactly 1 byte long, so we just |
| 2675 | adjust the PC in the regcache. */ |
| 2676 | current_pc += 1; |
| 2677 | regcache_write_pc (regcache, current_pc); |
| 2678 | } |
| 2679 | |
| 2680 | |
| 2681 | #define PREFIX_REPZ 0x01 |
| 2682 | #define PREFIX_REPNZ 0x02 |
| 2683 | #define PREFIX_LOCK 0x04 |
| 2684 | #define PREFIX_DATA 0x08 |
| 2685 | #define PREFIX_ADDR 0x10 |
| 2686 | |
| 2687 | /* operand size */ |
| 2688 | enum |
| 2689 | { |
| 2690 | OT_BYTE = 0, |
| 2691 | OT_WORD, |
| 2692 | OT_LONG, |
| 2693 | }; |
| 2694 | |
| 2695 | /* i386 arith/logic operations */ |
| 2696 | enum |
| 2697 | { |
| 2698 | OP_ADDL, |
| 2699 | OP_ORL, |
| 2700 | OP_ADCL, |
| 2701 | OP_SBBL, |
| 2702 | OP_ANDL, |
| 2703 | OP_SUBL, |
| 2704 | OP_XORL, |
| 2705 | OP_CMPL, |
| 2706 | }; |
| 2707 | |
| 2708 | struct i386_record_s |
| 2709 | { |
| 2710 | struct regcache *regcache; |
| 2711 | CORE_ADDR addr; |
| 2712 | int aflag; |
| 2713 | int dflag; |
| 2714 | int override; |
| 2715 | uint8_t modrm; |
| 2716 | uint8_t mod, reg, rm; |
| 2717 | int ot; |
| 2718 | }; |
| 2719 | |
| 2720 | /* Parse "modrm" part in current memory address that irp->addr point to |
| 2721 | Return -1 if something wrong. */ |
| 2722 | |
| 2723 | static int |
| 2724 | i386_record_modrm (struct i386_record_s *irp) |
| 2725 | { |
| 2726 | if (target_read_memory (irp->addr, &irp->modrm, 1)) |
| 2727 | { |
| 2728 | if (record_debug) |
| 2729 | printf_unfiltered (_("Process record: error reading memory at " |
| 2730 | "addr 0x%s len = 1.\n"), |
| 2731 | paddr_nz (irp->addr)); |
| 2732 | return -1; |
| 2733 | } |
| 2734 | irp->addr++; |
| 2735 | irp->mod = (irp->modrm >> 6) & 3; |
| 2736 | irp->reg = (irp->modrm >> 3) & 7; |
| 2737 | irp->rm = irp->modrm & 7; |
| 2738 | |
| 2739 | return 0; |
| 2740 | } |
| 2741 | |
| 2742 | /* Get the memory address that current instruction write to and set it to |
| 2743 | the argument "addr". |
| 2744 | Return -1 if something wrong. */ |
| 2745 | |
| 2746 | static int |
| 2747 | i386_record_lea_modrm_addr (struct i386_record_s *irp, uint32_t * addr) |
| 2748 | { |
| 2749 | uint8_t tmpu8; |
| 2750 | uint16_t tmpu16; |
| 2751 | uint32_t tmpu32; |
| 2752 | |
| 2753 | *addr = 0; |
| 2754 | if (irp->aflag) |
| 2755 | { |
| 2756 | /* 32 bits */ |
| 2757 | int havesib = 0; |
| 2758 | uint8_t scale = 0; |
| 2759 | uint8_t index = 0; |
| 2760 | uint8_t base = irp->rm; |
| 2761 | |
| 2762 | if (base == 4) |
| 2763 | { |
| 2764 | havesib = 1; |
| 2765 | if (target_read_memory (irp->addr, &tmpu8, 1)) |
| 2766 | { |
| 2767 | if (record_debug) |
| 2768 | printf_unfiltered (_("Process record: error reading memory " |
| 2769 | "at addr 0x%s len = 1.\n"), |
| 2770 | paddr_nz (irp->addr)); |
| 2771 | return -1; |
| 2772 | } |
| 2773 | irp->addr++; |
| 2774 | scale = (tmpu8 >> 6) & 3; |
| 2775 | index = ((tmpu8 >> 3) & 7); |
| 2776 | base = (tmpu8 & 7); |
| 2777 | } |
| 2778 | |
| 2779 | switch (irp->mod) |
| 2780 | { |
| 2781 | case 0: |
| 2782 | if ((base & 7) == 5) |
| 2783 | { |
| 2784 | base = 0xff; |
| 2785 | if (target_read_memory (irp->addr, (gdb_byte *) addr, 4)) |
| 2786 | { |
| 2787 | if (record_debug) |
| 2788 | printf_unfiltered (_("Process record: error reading " |
| 2789 | "memory at addr 0x%s len = 4.\n"), |
| 2790 | paddr_nz (irp->addr)); |
| 2791 | return -1; |
| 2792 | } |
| 2793 | irp->addr += 4; |
| 2794 | } |
| 2795 | else |
| 2796 | { |
| 2797 | *addr = 0; |
| 2798 | } |
| 2799 | break; |
| 2800 | case 1: |
| 2801 | if (target_read_memory (irp->addr, &tmpu8, 1)) |
| 2802 | { |
| 2803 | if (record_debug) |
| 2804 | printf_unfiltered (_("Process record: error reading memory " |
| 2805 | "at addr 0x%s len = 1.\n"), |
| 2806 | paddr_nz (irp->addr)); |
| 2807 | return -1; |
| 2808 | } |
| 2809 | irp->addr++; |
| 2810 | *addr = (int8_t) tmpu8; |
| 2811 | break; |
| 2812 | case 2: |
| 2813 | if (target_read_memory (irp->addr, (gdb_byte *) addr, 4)) |
| 2814 | { |
| 2815 | if (record_debug) |
| 2816 | printf_unfiltered (_("Process record: error reading memory " |
| 2817 | "at addr 0x%s len = 4.\n"), |
| 2818 | paddr_nz (irp->addr)); |
| 2819 | return -1; |
| 2820 | } |
| 2821 | irp->addr += 4; |
| 2822 | break; |
| 2823 | } |
| 2824 | |
| 2825 | if (base != 0xff) |
| 2826 | { |
| 2827 | regcache_raw_read (irp->regcache, base, (gdb_byte *) & tmpu32); |
| 2828 | *addr += tmpu32; |
| 2829 | } |
| 2830 | |
| 2831 | /* XXX: index == 4 is always invalid */ |
| 2832 | if (havesib && (index != 4 || scale != 0)) |
| 2833 | { |
| 2834 | regcache_raw_read (irp->regcache, index, (gdb_byte *) & tmpu32); |
| 2835 | *addr += tmpu32 << scale; |
| 2836 | } |
| 2837 | } |
| 2838 | else |
| 2839 | { |
| 2840 | /* 16 bits */ |
| 2841 | switch (irp->mod) |
| 2842 | { |
| 2843 | case 0: |
| 2844 | if (irp->rm == 6) |
| 2845 | { |
| 2846 | if (target_read_memory |
| 2847 | (irp->addr, (gdb_byte *) & tmpu16, 2)) |
| 2848 | { |
| 2849 | if (record_debug) |
| 2850 | printf_unfiltered (_("Process record: error reading " |
| 2851 | "memory at addr 0x%s len = 2.\n"), |
| 2852 | paddr_nz (irp->addr)); |
| 2853 | return -1; |
| 2854 | } |
| 2855 | irp->addr += 2; |
| 2856 | *addr = (int16_t) tmpu16; |
| 2857 | irp->rm = 0; |
| 2858 | goto no_rm; |
| 2859 | } |
| 2860 | else |
| 2861 | { |
| 2862 | *addr = 0; |
| 2863 | } |
| 2864 | break; |
| 2865 | case 1: |
| 2866 | if (target_read_memory (irp->addr, &tmpu8, 1)) |
| 2867 | { |
| 2868 | if (record_debug) |
| 2869 | printf_unfiltered (_("Process record: error reading memory " |
| 2870 | "at addr 0x%s len = 1.\n"), |
| 2871 | paddr_nz (irp->addr)); |
| 2872 | return -1; |
| 2873 | } |
| 2874 | irp->addr++; |
| 2875 | *addr = (int8_t) tmpu8; |
| 2876 | break; |
| 2877 | case 2: |
| 2878 | if (target_read_memory (irp->addr, (gdb_byte *) & tmpu16, 2)) |
| 2879 | { |
| 2880 | if (record_debug) |
| 2881 | printf_unfiltered (_("Process record: error reading memory " |
| 2882 | "at addr 0x%s len = 2.\n"), |
| 2883 | paddr_nz (irp->addr)); |
| 2884 | return -1; |
| 2885 | } |
| 2886 | irp->addr += 2; |
| 2887 | *addr = (int16_t) tmpu16; |
| 2888 | break; |
| 2889 | } |
| 2890 | |
| 2891 | switch (irp->rm) |
| 2892 | { |
| 2893 | case 0: |
| 2894 | regcache_raw_read (irp->regcache, I386_EBX_REGNUM, |
| 2895 | (gdb_byte *) & tmpu32); |
| 2896 | *addr += tmpu32; |
| 2897 | regcache_raw_read (irp->regcache, I386_ESI_REGNUM, |
| 2898 | (gdb_byte *) & tmpu32); |
| 2899 | *addr += tmpu32; |
| 2900 | break; |
| 2901 | case 1: |
| 2902 | regcache_raw_read (irp->regcache, I386_EBX_REGNUM, |
| 2903 | (gdb_byte *) & tmpu32); |
| 2904 | *addr += tmpu32; |
| 2905 | regcache_raw_read (irp->regcache, I386_EDI_REGNUM, |
| 2906 | (gdb_byte *) & tmpu32); |
| 2907 | *addr += tmpu32; |
| 2908 | break; |
| 2909 | case 2: |
| 2910 | regcache_raw_read (irp->regcache, I386_EBP_REGNUM, |
| 2911 | (gdb_byte *) & tmpu32); |
| 2912 | *addr += tmpu32; |
| 2913 | regcache_raw_read (irp->regcache, I386_ESI_REGNUM, |
| 2914 | (gdb_byte *) & tmpu32); |
| 2915 | *addr += tmpu32; |
| 2916 | break; |
| 2917 | case 3: |
| 2918 | regcache_raw_read (irp->regcache, I386_EBP_REGNUM, |
| 2919 | (gdb_byte *) & tmpu32); |
| 2920 | *addr += tmpu32; |
| 2921 | regcache_raw_read (irp->regcache, I386_EDI_REGNUM, |
| 2922 | (gdb_byte *) & tmpu32); |
| 2923 | *addr += tmpu32; |
| 2924 | break; |
| 2925 | case 4: |
| 2926 | regcache_raw_read (irp->regcache, I386_ESI_REGNUM, |
| 2927 | (gdb_byte *) & tmpu32); |
| 2928 | *addr += tmpu32; |
| 2929 | break; |
| 2930 | case 5: |
| 2931 | regcache_raw_read (irp->regcache, I386_EDI_REGNUM, |
| 2932 | (gdb_byte *) & tmpu32); |
| 2933 | *addr += tmpu32; |
| 2934 | break; |
| 2935 | case 6: |
| 2936 | regcache_raw_read (irp->regcache, I386_EBP_REGNUM, |
| 2937 | (gdb_byte *) & tmpu32); |
| 2938 | *addr += tmpu32; |
| 2939 | break; |
| 2940 | case 7: |
| 2941 | regcache_raw_read (irp->regcache, I386_EBX_REGNUM, |
| 2942 | (gdb_byte *) & tmpu32); |
| 2943 | *addr += tmpu32; |
| 2944 | break; |
| 2945 | } |
| 2946 | *addr &= 0xffff; |
| 2947 | } |
| 2948 | |
| 2949 | no_rm: |
| 2950 | return 0; |
| 2951 | } |
| 2952 | |
| 2953 | /* Record the value of the memory that willbe changed in current instruction |
| 2954 | to "record_arch_list". |
| 2955 | Return -1 if something wrong. */ |
| 2956 | |
| 2957 | static int |
| 2958 | i386_record_lea_modrm (struct i386_record_s *irp) |
| 2959 | { |
| 2960 | uint32_t addr; |
| 2961 | |
| 2962 | if (irp->override) |
| 2963 | { |
| 2964 | if (record_debug) |
| 2965 | printf_unfiltered (_("Process record ignores the memory change " |
| 2966 | "of instruction at address 0x%s because it " |
| 2967 | "can't get the value of the segment register.\n"), |
| 2968 | paddr_nz (irp->addr)); |
| 2969 | return 0; |
| 2970 | } |
| 2971 | |
| 2972 | if (i386_record_lea_modrm_addr (irp, &addr)) |
| 2973 | return -1; |
| 2974 | |
| 2975 | if (record_arch_list_add_mem (addr, 1 << irp->ot)) |
| 2976 | return -1; |
| 2977 | |
| 2978 | return 0; |
| 2979 | } |
| 2980 | |
| 2981 | /* Parse the current instruction and record the values of the registers and |
| 2982 | memory that will be changed in current instruction to "record_arch_list". |
| 2983 | Return -1 if something wrong. */ |
| 2984 | |
| 2985 | static int |
| 2986 | i386_process_record (struct gdbarch *gdbarch, struct regcache *regcache, |
| 2987 | CORE_ADDR addr) |
| 2988 | { |
| 2989 | int prefixes = 0; |
| 2990 | uint8_t tmpu8; |
| 2991 | uint16_t tmpu16; |
| 2992 | uint32_t tmpu32; |
| 2993 | uint32_t opcode; |
| 2994 | struct i386_record_s ir; |
| 2995 | |
| 2996 | bzero (&ir, sizeof (struct i386_record_s)); |
| 2997 | ir.regcache = regcache; |
| 2998 | ir.addr = addr; |
| 2999 | ir.aflag = 1; |
| 3000 | ir.dflag = 1; |
| 3001 | |
| 3002 | if (record_debug > 1) |
| 3003 | fprintf_unfiltered (gdb_stdlog, "Process record: i386_process_record " |
| 3004 | "addr = 0x%s\n", |
| 3005 | paddr_nz (ir.addr)); |
| 3006 | |
| 3007 | /* prefixes */ |
| 3008 | while (1) |
| 3009 | { |
| 3010 | if (target_read_memory (ir.addr, &tmpu8, 1)) |
| 3011 | { |
| 3012 | if (record_debug) |
| 3013 | printf_unfiltered (_("Process record: error reading memory at " |
| 3014 | "addr 0x%s len = 1.\n"), |
| 3015 | paddr_nz (ir.addr)); |
| 3016 | return -1; |
| 3017 | } |
| 3018 | ir.addr++; |
| 3019 | switch (tmpu8) |
| 3020 | { |
| 3021 | case 0xf3: |
| 3022 | prefixes |= PREFIX_REPZ; |
| 3023 | break; |
| 3024 | case 0xf2: |
| 3025 | prefixes |= PREFIX_REPNZ; |
| 3026 | break; |
| 3027 | case 0xf0: |
| 3028 | prefixes |= PREFIX_LOCK; |
| 3029 | break; |
| 3030 | case 0x2e: |
| 3031 | ir.override = I386_CS_REGNUM; |
| 3032 | break; |
| 3033 | case 0x36: |
| 3034 | ir.override = I386_SS_REGNUM; |
| 3035 | break; |
| 3036 | case 0x3e: |
| 3037 | ir.override = I386_DS_REGNUM; |
| 3038 | break; |
| 3039 | case 0x26: |
| 3040 | ir.override = I386_ES_REGNUM; |
| 3041 | break; |
| 3042 | case 0x64: |
| 3043 | ir.override = I386_FS_REGNUM; |
| 3044 | break; |
| 3045 | case 0x65: |
| 3046 | ir.override = I386_GS_REGNUM; |
| 3047 | break; |
| 3048 | case 0x66: |
| 3049 | prefixes |= PREFIX_DATA; |
| 3050 | break; |
| 3051 | case 0x67: |
| 3052 | prefixes |= PREFIX_ADDR; |
| 3053 | break; |
| 3054 | default: |
| 3055 | goto out_prefixes; |
| 3056 | break; |
| 3057 | } |
| 3058 | } |
| 3059 | out_prefixes: |
| 3060 | if (prefixes & PREFIX_DATA) |
| 3061 | ir.dflag ^= 1; |
| 3062 | if (prefixes & PREFIX_ADDR) |
| 3063 | ir.aflag ^= 1; |
| 3064 | |
| 3065 | /* now check op code */ |
| 3066 | opcode = (uint32_t) tmpu8; |
| 3067 | reswitch: |
| 3068 | switch (opcode) |
| 3069 | { |
| 3070 | case 0x0f: |
| 3071 | if (target_read_memory (ir.addr, &tmpu8, 1)) |
| 3072 | { |
| 3073 | if (record_debug) |
| 3074 | printf_unfiltered (_("Process record: error reading memory at " |
| 3075 | "addr 0x%s len = 1.\n"), |
| 3076 | paddr_nz (ir.addr)); |
| 3077 | return -1; |
| 3078 | } |
| 3079 | ir.addr++; |
| 3080 | opcode = (uint16_t) tmpu8 | 0x0f00; |
| 3081 | goto reswitch; |
| 3082 | break; |
| 3083 | |
| 3084 | /* arith & logic */ |
| 3085 | case 0x00: |
| 3086 | case 0x01: |
| 3087 | case 0x02: |
| 3088 | case 0x03: |
| 3089 | case 0x04: |
| 3090 | case 0x05: |
| 3091 | case 0x08: |
| 3092 | case 0x09: |
| 3093 | case 0x0a: |
| 3094 | case 0x0b: |
| 3095 | case 0x0c: |
| 3096 | case 0x0d: |
| 3097 | case 0x10: |
| 3098 | case 0x11: |
| 3099 | case 0x12: |
| 3100 | case 0x13: |
| 3101 | case 0x14: |
| 3102 | case 0x15: |
| 3103 | case 0x18: |
| 3104 | case 0x19: |
| 3105 | case 0x1a: |
| 3106 | case 0x1b: |
| 3107 | case 0x1c: |
| 3108 | case 0x1d: |
| 3109 | case 0x20: |
| 3110 | case 0x21: |
| 3111 | case 0x22: |
| 3112 | case 0x23: |
| 3113 | case 0x24: |
| 3114 | case 0x25: |
| 3115 | case 0x28: |
| 3116 | case 0x29: |
| 3117 | case 0x2a: |
| 3118 | case 0x2b: |
| 3119 | case 0x2c: |
| 3120 | case 0x2d: |
| 3121 | case 0x30: |
| 3122 | case 0x31: |
| 3123 | case 0x32: |
| 3124 | case 0x33: |
| 3125 | case 0x34: |
| 3126 | case 0x35: |
| 3127 | case 0x38: |
| 3128 | case 0x39: |
| 3129 | case 0x3a: |
| 3130 | case 0x3b: |
| 3131 | case 0x3c: |
| 3132 | case 0x3d: |
| 3133 | if (((opcode >> 3) & 7) != OP_CMPL) |
| 3134 | { |
| 3135 | if ((opcode & 1) == 0) |
| 3136 | ir.ot = OT_BYTE; |
| 3137 | else |
| 3138 | ir.ot = ir.dflag + OT_WORD; |
| 3139 | |
| 3140 | switch ((opcode >> 1) & 3) |
| 3141 | { |
| 3142 | /* OP Ev, Gv */ |
| 3143 | case 0: |
| 3144 | if (i386_record_modrm (&ir)) |
| 3145 | return -1; |
| 3146 | if (ir.mod != 3) |
| 3147 | { |
| 3148 | if (i386_record_lea_modrm (&ir)) |
| 3149 | return -1; |
| 3150 | } |
| 3151 | else |
| 3152 | { |
| 3153 | if (ir.ot == OT_BYTE) |
| 3154 | ir.rm &= 0x3; |
| 3155 | if (record_arch_list_add_reg (ir.regcache, ir.rm)) |
| 3156 | return -1; |
| 3157 | } |
| 3158 | break; |
| 3159 | /* OP Gv, Ev */ |
| 3160 | case 1: |
| 3161 | if (i386_record_modrm (&ir)) |
| 3162 | return -1; |
| 3163 | if (ir.ot == OT_BYTE) |
| 3164 | ir.reg &= 0x3; |
| 3165 | if (record_arch_list_add_reg (ir.regcache, ir.reg)) |
| 3166 | return -1; |
| 3167 | break; |
| 3168 | /* OP A, Iv */ |
| 3169 | case 2: |
| 3170 | if (record_arch_list_add_reg (ir.regcache, I386_EAX_REGNUM)) |
| 3171 | return -1; |
| 3172 | break; |
| 3173 | } |
| 3174 | } |
| 3175 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 3176 | return -1; |
| 3177 | break; |
| 3178 | |
| 3179 | /* GRP1 */ |
| 3180 | case 0x80: |
| 3181 | case 0x81: |
| 3182 | case 0x82: |
| 3183 | case 0x83: |
| 3184 | if (i386_record_modrm (&ir)) |
| 3185 | return -1; |
| 3186 | |
| 3187 | if (ir.reg != OP_CMPL) |
| 3188 | { |
| 3189 | if ((opcode & 1) == 0) |
| 3190 | ir.ot = OT_BYTE; |
| 3191 | else |
| 3192 | ir.ot = ir.dflag + OT_WORD; |
| 3193 | |
| 3194 | if (ir.mod != 3) |
| 3195 | { |
| 3196 | if (i386_record_lea_modrm (&ir)) |
| 3197 | return -1; |
| 3198 | } |
| 3199 | else |
| 3200 | { |
| 3201 | if (record_arch_list_add_reg (ir.regcache, ir.rm)) |
| 3202 | return -1; |
| 3203 | } |
| 3204 | } |
| 3205 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 3206 | return -1; |
| 3207 | break; |
| 3208 | |
| 3209 | /* inv */ |
| 3210 | case 0x40: |
| 3211 | case 0x41: |
| 3212 | case 0x42: |
| 3213 | case 0x43: |
| 3214 | case 0x44: |
| 3215 | case 0x45: |
| 3216 | case 0x46: |
| 3217 | case 0x47: |
| 3218 | /* dec */ |
| 3219 | case 0x48: |
| 3220 | case 0x49: |
| 3221 | case 0x4a: |
| 3222 | case 0x4b: |
| 3223 | case 0x4c: |
| 3224 | case 0x4d: |
| 3225 | case 0x4e: |
| 3226 | case 0x4f: |
| 3227 | if (record_arch_list_add_reg (ir.regcache, opcode & 7)) |
| 3228 | return -1; |
| 3229 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 3230 | return -1; |
| 3231 | break; |
| 3232 | |
| 3233 | /* GRP3 */ |
| 3234 | case 0xf6: |
| 3235 | case 0xf7: |
| 3236 | if ((opcode & 1) == 0) |
| 3237 | ir.ot = OT_BYTE; |
| 3238 | else |
| 3239 | ir.ot = ir.dflag + OT_WORD; |
| 3240 | if (i386_record_modrm (&ir)) |
| 3241 | return -1; |
| 3242 | |
| 3243 | switch (ir.reg) |
| 3244 | { |
| 3245 | /* test */ |
| 3246 | case 0: |
| 3247 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 3248 | return -1; |
| 3249 | break; |
| 3250 | /* not */ |
| 3251 | case 2: |
| 3252 | if (ir.mod != 3) |
| 3253 | { |
| 3254 | if (i386_record_lea_modrm (&ir)) |
| 3255 | return -1; |
| 3256 | } |
| 3257 | else |
| 3258 | { |
| 3259 | if (ir.ot == OT_BYTE) |
| 3260 | ir.rm &= 0x3; |
| 3261 | if (record_arch_list_add_reg (ir.regcache, ir.rm)) |
| 3262 | return -1; |
| 3263 | } |
| 3264 | break; |
| 3265 | /* neg */ |
| 3266 | case 3: |
| 3267 | if (ir.mod != 3) |
| 3268 | { |
| 3269 | if (i386_record_lea_modrm (&ir)) |
| 3270 | return -1; |
| 3271 | } |
| 3272 | else |
| 3273 | { |
| 3274 | if (ir.ot == OT_BYTE) |
| 3275 | ir.rm &= 0x3; |
| 3276 | if (record_arch_list_add_reg (ir.regcache, ir.rm)) |
| 3277 | return -1; |
| 3278 | } |
| 3279 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 3280 | return -1; |
| 3281 | break; |
| 3282 | /* mul */ |
| 3283 | case 4: |
| 3284 | /* imul */ |
| 3285 | case 5: |
| 3286 | /* div */ |
| 3287 | case 6: |
| 3288 | /* idiv */ |
| 3289 | case 7: |
| 3290 | if (record_arch_list_add_reg (ir.regcache, I386_EAX_REGNUM)) |
| 3291 | return -1; |
| 3292 | if (ir.ot != OT_BYTE) |
| 3293 | { |
| 3294 | if (record_arch_list_add_reg (ir.regcache, I386_EDX_REGNUM)) |
| 3295 | return -1; |
| 3296 | } |
| 3297 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 3298 | return -1; |
| 3299 | break; |
| 3300 | default: |
| 3301 | ir.addr -= 2; |
| 3302 | opcode = opcode << 8 | ir.modrm; |
| 3303 | goto no_support; |
| 3304 | break; |
| 3305 | } |
| 3306 | break; |
| 3307 | |
| 3308 | /* GRP4 */ |
| 3309 | case 0xfe: |
| 3310 | /* GRP5 */ |
| 3311 | case 0xff: |
| 3312 | if ((opcode & 1) == 0) |
| 3313 | ir.ot = OT_BYTE; |
| 3314 | else |
| 3315 | ir.ot = ir.dflag + OT_WORD; |
| 3316 | if (i386_record_modrm (&ir)) |
| 3317 | return -1; |
| 3318 | if (ir.reg >= 2 && opcode == 0xfe) |
| 3319 | { |
| 3320 | ir.addr -= 2; |
| 3321 | opcode = opcode << 8 | ir.modrm; |
| 3322 | goto no_support; |
| 3323 | } |
| 3324 | |
| 3325 | switch (ir.reg) |
| 3326 | { |
| 3327 | /* inc */ |
| 3328 | case 0: |
| 3329 | /* dec */ |
| 3330 | case 1: |
| 3331 | if (ir.mod != 3) |
| 3332 | { |
| 3333 | if (i386_record_lea_modrm (&ir)) |
| 3334 | return -1; |
| 3335 | } |
| 3336 | else |
| 3337 | { |
| 3338 | if (ir.ot == OT_BYTE) |
| 3339 | ir.rm &= 0x3; |
| 3340 | if (record_arch_list_add_reg (ir.regcache, ir.rm)) |
| 3341 | return -1; |
| 3342 | } |
| 3343 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 3344 | return -1; |
| 3345 | break; |
| 3346 | /* call */ |
| 3347 | case 2: |
| 3348 | /* push */ |
| 3349 | case 6: |
| 3350 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 3351 | return -1; |
| 3352 | regcache_raw_read (ir.regcache, I386_ESP_REGNUM, |
| 3353 | (gdb_byte *) & tmpu32); |
| 3354 | if (record_arch_list_add_mem |
| 3355 | ((CORE_ADDR) tmpu32 - (1 << (ir.dflag + 1)), (1 << (ir.dflag + 1)))) |
| 3356 | return -1; |
| 3357 | break; |
| 3358 | /* lcall */ |
| 3359 | case 3: |
| 3360 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 3361 | return -1; |
| 3362 | if (record_arch_list_add_reg (ir.regcache, I386_CS_REGNUM)) |
| 3363 | return -1; |
| 3364 | regcache_raw_read (ir.regcache, I386_ESP_REGNUM, |
| 3365 | (gdb_byte *) & tmpu32); |
| 3366 | if (record_arch_list_add_mem |
| 3367 | ((CORE_ADDR) tmpu32 - (1 << (ir.dflag + 2)), (1 << (ir.dflag + 2)))) |
| 3368 | return -1; |
| 3369 | break; |
| 3370 | /* jmp */ |
| 3371 | case 4: |
| 3372 | /* ljmp */ |
| 3373 | case 5: |
| 3374 | break; |
| 3375 | default: |
| 3376 | ir.addr -= 2; |
| 3377 | opcode = opcode << 8 | ir.modrm; |
| 3378 | goto no_support; |
| 3379 | break; |
| 3380 | } |
| 3381 | break; |
| 3382 | |
| 3383 | /* test */ |
| 3384 | case 0x84: |
| 3385 | case 0x85: |
| 3386 | case 0xa8: |
| 3387 | case 0xa9: |
| 3388 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 3389 | return -1; |
| 3390 | break; |
| 3391 | |
| 3392 | /* CWDE/CBW */ |
| 3393 | case 0x98: |
| 3394 | if (record_arch_list_add_reg (ir.regcache, I386_EAX_REGNUM)) |
| 3395 | return -1; |
| 3396 | break; |
| 3397 | |
| 3398 | /* CDQ/CWD */ |
| 3399 | case 0x99: |
| 3400 | if (record_arch_list_add_reg (ir.regcache, I386_EAX_REGNUM)) |
| 3401 | return -1; |
| 3402 | if (record_arch_list_add_reg (ir.regcache, I386_EDX_REGNUM)) |
| 3403 | return -1; |
| 3404 | break; |
| 3405 | |
| 3406 | /* imul */ |
| 3407 | case 0x0faf: |
| 3408 | case 0x69: |
| 3409 | case 0x6b: |
| 3410 | ir.ot = ir.dflag + OT_WORD; |
| 3411 | if (i386_record_modrm (&ir)) |
| 3412 | return -1; |
| 3413 | if (ir.ot == OT_BYTE) |
| 3414 | ir.reg &= 0x3; |
| 3415 | if (record_arch_list_add_reg (ir.regcache, ir.reg)) |
| 3416 | return -1; |
| 3417 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 3418 | return -1; |
| 3419 | break; |
| 3420 | |
| 3421 | /* xadd */ |
| 3422 | case 0x0fc0: |
| 3423 | case 0x0fc1: |
| 3424 | if ((opcode & 1) == 0) |
| 3425 | ir.ot = OT_BYTE; |
| 3426 | else |
| 3427 | ir.ot = ir.dflag + OT_WORD; |
| 3428 | if (i386_record_modrm (&ir)) |
| 3429 | return -1; |
| 3430 | if (ir.mod == 3) |
| 3431 | { |
| 3432 | if (ir.ot == OT_BYTE) |
| 3433 | ir.reg &= 0x3; |
| 3434 | if (record_arch_list_add_reg (ir.regcache, ir.reg)) |
| 3435 | return -1; |
| 3436 | if (ir.ot == OT_BYTE) |
| 3437 | ir.rm &= 0x3; |
| 3438 | if (record_arch_list_add_reg (ir.regcache, ir.rm)) |
| 3439 | return -1; |
| 3440 | } |
| 3441 | else |
| 3442 | { |
| 3443 | if (i386_record_lea_modrm (&ir)) |
| 3444 | return -1; |
| 3445 | if (ir.ot == OT_BYTE) |
| 3446 | ir.reg &= 0x3; |
| 3447 | if (record_arch_list_add_reg (ir.regcache, ir.reg)) |
| 3448 | return -1; |
| 3449 | } |
| 3450 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 3451 | return -1; |
| 3452 | break; |
| 3453 | |
| 3454 | /* cmpxchg */ |
| 3455 | case 0x0fb0: |
| 3456 | case 0x0fb1: |
| 3457 | if ((opcode & 1) == 0) |
| 3458 | ir.ot = OT_BYTE; |
| 3459 | else |
| 3460 | ir.ot = ir.dflag + OT_WORD; |
| 3461 | if (i386_record_modrm (&ir)) |
| 3462 | return -1; |
| 3463 | if (ir.mod == 3) |
| 3464 | { |
| 3465 | if (record_arch_list_add_reg (ir.regcache, I386_EAX_REGNUM)) |
| 3466 | return -1; |
| 3467 | if (ir.ot == OT_BYTE) |
| 3468 | ir.reg &= 0x3; |
| 3469 | if (record_arch_list_add_reg (ir.regcache, ir.reg)) |
| 3470 | return -1; |
| 3471 | } |
| 3472 | else |
| 3473 | { |
| 3474 | if (record_arch_list_add_reg (ir.regcache, I386_EAX_REGNUM)) |
| 3475 | return -1; |
| 3476 | if (i386_record_lea_modrm (&ir)) |
| 3477 | return -1; |
| 3478 | } |
| 3479 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 3480 | return -1; |
| 3481 | break; |
| 3482 | |
| 3483 | /* cmpxchg8b */ |
| 3484 | case 0x0fc7: |
| 3485 | if (i386_record_modrm (&ir)) |
| 3486 | return -1; |
| 3487 | if (ir.mod == 3) |
| 3488 | { |
| 3489 | ir.addr -= 2; |
| 3490 | opcode = opcode << 8 | ir.modrm; |
| 3491 | goto no_support; |
| 3492 | } |
| 3493 | if (record_arch_list_add_reg (ir.regcache, I386_EAX_REGNUM)) |
| 3494 | return -1; |
| 3495 | if (record_arch_list_add_reg (ir.regcache, I386_EDX_REGNUM)) |
| 3496 | return -1; |
| 3497 | if (i386_record_lea_modrm (&ir)) |
| 3498 | return -1; |
| 3499 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 3500 | return -1; |
| 3501 | break; |
| 3502 | |
| 3503 | /* push */ |
| 3504 | case 0x50: |
| 3505 | case 0x51: |
| 3506 | case 0x52: |
| 3507 | case 0x53: |
| 3508 | case 0x54: |
| 3509 | case 0x55: |
| 3510 | case 0x56: |
| 3511 | case 0x57: |
| 3512 | case 0x68: |
| 3513 | case 0x6a: |
| 3514 | /* push es */ |
| 3515 | case 0x06: |
| 3516 | /* push cs */ |
| 3517 | case 0x0e: |
| 3518 | /* push ss */ |
| 3519 | case 0x16: |
| 3520 | /* push ds */ |
| 3521 | case 0x1e: |
| 3522 | /* push fs */ |
| 3523 | case 0x0fa0: |
| 3524 | /* push gs */ |
| 3525 | case 0x0fa8: |
| 3526 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 3527 | return -1; |
| 3528 | regcache_raw_read (ir.regcache, I386_ESP_REGNUM, |
| 3529 | (gdb_byte *) & tmpu32); |
| 3530 | if (record_arch_list_add_mem |
| 3531 | ((CORE_ADDR) tmpu32 - (1 << (ir.dflag + 1)), (1 << (ir.dflag + 1)))) |
| 3532 | return -1; |
| 3533 | break; |
| 3534 | |
| 3535 | /* pop */ |
| 3536 | case 0x58: |
| 3537 | case 0x59: |
| 3538 | case 0x5a: |
| 3539 | case 0x5b: |
| 3540 | case 0x5c: |
| 3541 | case 0x5d: |
| 3542 | case 0x5e: |
| 3543 | case 0x5f: |
| 3544 | ir.ot = ir.dflag + OT_WORD; |
| 3545 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 3546 | return -1; |
| 3547 | if (ir.ot == OT_BYTE) |
| 3548 | opcode &= 0x3; |
| 3549 | if (record_arch_list_add_reg (ir.regcache, opcode & 0x7)) |
| 3550 | return -1; |
| 3551 | break; |
| 3552 | |
| 3553 | /* pusha */ |
| 3554 | case 0x60: |
| 3555 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 3556 | return -1; |
| 3557 | regcache_raw_read (ir.regcache, I386_ESP_REGNUM, |
| 3558 | (gdb_byte *) & tmpu32); |
| 3559 | if (record_arch_list_add_mem |
| 3560 | ((CORE_ADDR) tmpu32 - (1 << (ir.dflag + 4)), (1 << (ir.dflag + 4)))) |
| 3561 | return -1; |
| 3562 | break; |
| 3563 | |
| 3564 | /* popa */ |
| 3565 | case 0x61: |
| 3566 | for (tmpu8 = I386_EAX_REGNUM; tmpu8 <= I386_EDI_REGNUM; tmpu8++) |
| 3567 | { |
| 3568 | if (record_arch_list_add_reg (ir.regcache, tmpu8)) |
| 3569 | return -1; |
| 3570 | } |
| 3571 | break; |
| 3572 | |
| 3573 | /* pop */ |
| 3574 | case 0x8f: |
| 3575 | ir.ot = ir.dflag + OT_WORD; |
| 3576 | if (i386_record_modrm (&ir)) |
| 3577 | return -1; |
| 3578 | if (ir.mod == 3) |
| 3579 | { |
| 3580 | if (record_arch_list_add_reg (ir.regcache, ir.rm)) |
| 3581 | return -1; |
| 3582 | } |
| 3583 | else |
| 3584 | { |
| 3585 | if (i386_record_lea_modrm (&ir)) |
| 3586 | return -1; |
| 3587 | } |
| 3588 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 3589 | return -1; |
| 3590 | break; |
| 3591 | |
| 3592 | /* enter */ |
| 3593 | case 0xc8: |
| 3594 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 3595 | return -1; |
| 3596 | if (record_arch_list_add_reg (ir.regcache, I386_EBP_REGNUM)) |
| 3597 | return -1; |
| 3598 | regcache_raw_read (ir.regcache, I386_ESP_REGNUM, |
| 3599 | (gdb_byte *) & tmpu32); |
| 3600 | if (record_arch_list_add_mem |
| 3601 | ((CORE_ADDR) tmpu32 - (1 << (ir.dflag + 1)), (1 << (ir.dflag + 1)))) |
| 3602 | return -1; |
| 3603 | break; |
| 3604 | |
| 3605 | /* leave */ |
| 3606 | case 0xc9: |
| 3607 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 3608 | return -1; |
| 3609 | if (record_arch_list_add_reg (ir.regcache, I386_EBP_REGNUM)) |
| 3610 | return -1; |
| 3611 | break; |
| 3612 | |
| 3613 | /* pop es */ |
| 3614 | case 0x07: |
| 3615 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 3616 | return -1; |
| 3617 | if (record_arch_list_add_reg (ir.regcache, I386_ES_REGNUM)) |
| 3618 | return -1; |
| 3619 | break; |
| 3620 | |
| 3621 | /* pop ss */ |
| 3622 | case 0x17: |
| 3623 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 3624 | return -1; |
| 3625 | if (record_arch_list_add_reg (ir.regcache, I386_SS_REGNUM)) |
| 3626 | return -1; |
| 3627 | break; |
| 3628 | |
| 3629 | /* pop ds */ |
| 3630 | case 0x1f: |
| 3631 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 3632 | return -1; |
| 3633 | if (record_arch_list_add_reg (ir.regcache, I386_DS_REGNUM)) |
| 3634 | return -1; |
| 3635 | break; |
| 3636 | |
| 3637 | /* pop fs */ |
| 3638 | case 0x0fa1: |
| 3639 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 3640 | return -1; |
| 3641 | if (record_arch_list_add_reg (ir.regcache, I386_FS_REGNUM)) |
| 3642 | return -1; |
| 3643 | break; |
| 3644 | |
| 3645 | /* pop gs */ |
| 3646 | case 0x0fa9: |
| 3647 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 3648 | return -1; |
| 3649 | if (record_arch_list_add_reg (ir.regcache, I386_GS_REGNUM)) |
| 3650 | return -1; |
| 3651 | break; |
| 3652 | |
| 3653 | /* mov */ |
| 3654 | case 0x88: |
| 3655 | case 0x89: |
| 3656 | case 0xc6: |
| 3657 | case 0xc7: |
| 3658 | if ((opcode & 1) == 0) |
| 3659 | ir.ot = OT_BYTE; |
| 3660 | else |
| 3661 | ir.ot = ir.dflag + OT_WORD; |
| 3662 | |
| 3663 | if (i386_record_modrm (&ir)) |
| 3664 | return -1; |
| 3665 | |
| 3666 | if (ir.mod != 3) |
| 3667 | { |
| 3668 | if (i386_record_lea_modrm (&ir)) |
| 3669 | return -1; |
| 3670 | } |
| 3671 | else |
| 3672 | { |
| 3673 | if (ir.ot == OT_BYTE) |
| 3674 | ir.rm &= 0x3; |
| 3675 | if (record_arch_list_add_reg (ir.regcache, ir.rm)) |
| 3676 | return -1; |
| 3677 | } |
| 3678 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 3679 | return -1; |
| 3680 | break; |
| 3681 | /* mov */ |
| 3682 | case 0x8a: |
| 3683 | case 0x8b: |
| 3684 | if ((opcode & 1) == 0) |
| 3685 | ir.ot = OT_BYTE; |
| 3686 | else |
| 3687 | ir.ot = ir.dflag + OT_WORD; |
| 3688 | |
| 3689 | if (i386_record_modrm (&ir)) |
| 3690 | return -1; |
| 3691 | |
| 3692 | if (ir.ot == OT_BYTE) |
| 3693 | ir.reg &= 0x3; |
| 3694 | if (record_arch_list_add_reg (ir.regcache, ir.reg)) |
| 3695 | return -1; |
| 3696 | |
| 3697 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 3698 | return -1; |
| 3699 | break; |
| 3700 | |
| 3701 | /* mov seg */ |
| 3702 | case 0x8e: |
| 3703 | if (i386_record_modrm (&ir)) |
| 3704 | return -1; |
| 3705 | |
| 3706 | switch (ir.reg) |
| 3707 | { |
| 3708 | case 0: |
| 3709 | tmpu8 = I386_ES_REGNUM; |
| 3710 | break; |
| 3711 | case 2: |
| 3712 | tmpu8 = I386_SS_REGNUM; |
| 3713 | break; |
| 3714 | case 3: |
| 3715 | tmpu8 = I386_DS_REGNUM; |
| 3716 | break; |
| 3717 | case 4: |
| 3718 | tmpu8 = I386_FS_REGNUM; |
| 3719 | break; |
| 3720 | case 5: |
| 3721 | tmpu8 = I386_GS_REGNUM; |
| 3722 | break; |
| 3723 | default: |
| 3724 | ir.addr -= 2; |
| 3725 | opcode = opcode << 8 | ir.modrm; |
| 3726 | goto no_support; |
| 3727 | break; |
| 3728 | } |
| 3729 | if (record_arch_list_add_reg (ir.regcache, tmpu8)) |
| 3730 | return -1; |
| 3731 | |
| 3732 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 3733 | return -1; |
| 3734 | break; |
| 3735 | |
| 3736 | /* mov seg */ |
| 3737 | case 0x8c: |
| 3738 | if (i386_record_modrm (&ir)) |
| 3739 | return -1; |
| 3740 | if (ir.reg > 5) |
| 3741 | { |
| 3742 | ir.addr -= 2; |
| 3743 | opcode = opcode << 8 | ir.modrm; |
| 3744 | goto no_support; |
| 3745 | } |
| 3746 | |
| 3747 | if (ir.mod == 3) |
| 3748 | { |
| 3749 | if (record_arch_list_add_reg (ir.regcache, ir.rm)) |
| 3750 | return -1; |
| 3751 | } |
| 3752 | else |
| 3753 | { |
| 3754 | ir.ot = OT_WORD; |
| 3755 | if (i386_record_lea_modrm (&ir)) |
| 3756 | return -1; |
| 3757 | } |
| 3758 | |
| 3759 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 3760 | return -1; |
| 3761 | break; |
| 3762 | |
| 3763 | /* movzbS */ |
| 3764 | case 0x0fb6: |
| 3765 | /* movzwS */ |
| 3766 | case 0x0fb7: |
| 3767 | /* movsbS */ |
| 3768 | case 0x0fbe: |
| 3769 | /* movswS */ |
| 3770 | case 0x0fbf: |
| 3771 | if (i386_record_modrm (&ir)) |
| 3772 | return -1; |
| 3773 | if (record_arch_list_add_reg (ir.regcache, ir.reg)) |
| 3774 | return -1; |
| 3775 | break; |
| 3776 | |
| 3777 | /* lea */ |
| 3778 | case 0x8d: |
| 3779 | if (i386_record_modrm (&ir)) |
| 3780 | return -1; |
| 3781 | if (ir.mod == 3) |
| 3782 | { |
| 3783 | ir.addr -= 2; |
| 3784 | opcode = opcode << 8 | ir.modrm; |
| 3785 | goto no_support; |
| 3786 | } |
| 3787 | |
| 3788 | ir.ot = ir.dflag; |
| 3789 | if (ir.ot == OT_BYTE) |
| 3790 | ir.reg &= 0x3; |
| 3791 | if (record_arch_list_add_reg (ir.regcache, ir.reg)) |
| 3792 | return -1; |
| 3793 | break; |
| 3794 | |
| 3795 | /* mov EAX */ |
| 3796 | case 0xa0: |
| 3797 | case 0xa1: |
| 3798 | /* xlat */ |
| 3799 | case 0xd7: |
| 3800 | if (record_arch_list_add_reg (ir.regcache, I386_EAX_REGNUM)) |
| 3801 | return -1; |
| 3802 | break; |
| 3803 | |
| 3804 | /* mov EAX */ |
| 3805 | case 0xa2: |
| 3806 | case 0xa3: |
| 3807 | { |
| 3808 | uint32_t addr; |
| 3809 | |
| 3810 | if (ir.override) |
| 3811 | { |
| 3812 | if (record_debug) |
| 3813 | printf_unfiltered (_("Process record ignores the memory change " |
| 3814 | "of instruction at address 0x%s because " |
| 3815 | "it can't get the value of the segment " |
| 3816 | "register.\n"), |
| 3817 | paddr_nz (ir.addr)); |
| 3818 | } |
| 3819 | else |
| 3820 | { |
| 3821 | if ((opcode & 1) == 0) |
| 3822 | ir.ot = OT_BYTE; |
| 3823 | else |
| 3824 | ir.ot = ir.dflag + OT_WORD; |
| 3825 | if (ir.aflag) |
| 3826 | { |
| 3827 | if (target_read_memory |
| 3828 | (ir.addr, (gdb_byte *) & addr, 4)) |
| 3829 | { |
| 3830 | if (record_debug) |
| 3831 | printf_unfiltered (_("Process record: error reading " |
| 3832 | "memory at addr 0x%s len = 4.\n"), |
| 3833 | paddr_nz (ir.addr)); |
| 3834 | return -1; |
| 3835 | } |
| 3836 | ir.addr += 4; |
| 3837 | } |
| 3838 | else |
| 3839 | { |
| 3840 | if (target_read_memory |
| 3841 | (ir.addr, (gdb_byte *) & tmpu16, 4)) |
| 3842 | { |
| 3843 | if (record_debug) |
| 3844 | printf_unfiltered (_("Process record: error reading " |
| 3845 | "memory at addr 0x%s len = 4.\n"), |
| 3846 | paddr_nz (ir.addr)); |
| 3847 | return -1; |
| 3848 | } |
| 3849 | ir.addr += 2; |
| 3850 | addr = tmpu16; |
| 3851 | } |
| 3852 | if (record_arch_list_add_mem (addr, 1 << ir.ot)) |
| 3853 | return -1; |
| 3854 | } |
| 3855 | } |
| 3856 | break; |
| 3857 | |
| 3858 | /* mov R, Ib */ |
| 3859 | case 0xb0: |
| 3860 | case 0xb1: |
| 3861 | case 0xb2: |
| 3862 | case 0xb3: |
| 3863 | case 0xb4: |
| 3864 | case 0xb5: |
| 3865 | case 0xb6: |
| 3866 | case 0xb7: |
| 3867 | if (record_arch_list_add_reg (ir.regcache, (opcode & 0x7) & 0x3)) |
| 3868 | return -1; |
| 3869 | break; |
| 3870 | |
| 3871 | /* mov R, Iv */ |
| 3872 | case 0xb8: |
| 3873 | case 0xb9: |
| 3874 | case 0xba: |
| 3875 | case 0xbb: |
| 3876 | case 0xbc: |
| 3877 | case 0xbd: |
| 3878 | case 0xbe: |
| 3879 | case 0xbf: |
| 3880 | if (record_arch_list_add_reg (ir.regcache, opcode & 0x7)) |
| 3881 | return -1; |
| 3882 | break; |
| 3883 | |
| 3884 | /* xchg R, EAX */ |
| 3885 | case 0x91: |
| 3886 | case 0x92: |
| 3887 | case 0x93: |
| 3888 | case 0x94: |
| 3889 | case 0x95: |
| 3890 | case 0x96: |
| 3891 | case 0x97: |
| 3892 | if (record_arch_list_add_reg (ir.regcache, I386_EAX_REGNUM)) |
| 3893 | return -1; |
| 3894 | if (record_arch_list_add_reg (ir.regcache, opcode & 0x7)) |
| 3895 | return -1; |
| 3896 | break; |
| 3897 | |
| 3898 | /* xchg Ev, Gv */ |
| 3899 | case 0x86: |
| 3900 | case 0x87: |
| 3901 | if ((opcode & 1) == 0) |
| 3902 | ir.ot = OT_BYTE; |
| 3903 | else |
| 3904 | ir.ot = ir.dflag + OT_WORD; |
| 3905 | |
| 3906 | if (i386_record_modrm (&ir)) |
| 3907 | return -1; |
| 3908 | |
| 3909 | if (ir.mod == 3) |
| 3910 | { |
| 3911 | if (ir.ot == OT_BYTE) |
| 3912 | ir.rm &= 0x3; |
| 3913 | if (record_arch_list_add_reg (ir.regcache, ir.rm)) |
| 3914 | return -1; |
| 3915 | } |
| 3916 | else |
| 3917 | { |
| 3918 | if (i386_record_lea_modrm (&ir)) |
| 3919 | return -1; |
| 3920 | } |
| 3921 | |
| 3922 | if (ir.ot == OT_BYTE) |
| 3923 | ir.reg &= 0x3; |
| 3924 | if (record_arch_list_add_reg (ir.regcache, ir.reg)) |
| 3925 | return -1; |
| 3926 | break; |
| 3927 | |
| 3928 | /* les Gv */ |
| 3929 | case 0xc4: |
| 3930 | /* lds Gv */ |
| 3931 | case 0xc5: |
| 3932 | /* lss Gv */ |
| 3933 | case 0x0fb2: |
| 3934 | /* lfs Gv */ |
| 3935 | case 0x0fb4: |
| 3936 | /* lgs Gv */ |
| 3937 | case 0x0fb5: |
| 3938 | if (i386_record_modrm (&ir)) |
| 3939 | return -1; |
| 3940 | if (ir.mod == 3) |
| 3941 | { |
| 3942 | if (opcode > 0xff) |
| 3943 | ir.addr -= 3; |
| 3944 | else |
| 3945 | ir.addr -= 2; |
| 3946 | opcode = opcode << 8 | ir.modrm; |
| 3947 | goto no_support; |
| 3948 | } |
| 3949 | |
| 3950 | switch (opcode) |
| 3951 | { |
| 3952 | /* les Gv */ |
| 3953 | case 0xc4: |
| 3954 | tmpu8 = I386_ES_REGNUM; |
| 3955 | break; |
| 3956 | /* lds Gv */ |
| 3957 | case 0xc5: |
| 3958 | tmpu8 = I386_DS_REGNUM; |
| 3959 | break; |
| 3960 | /* lss Gv */ |
| 3961 | case 0x0fb2: |
| 3962 | tmpu8 = I386_SS_REGNUM; |
| 3963 | break; |
| 3964 | /* lfs Gv */ |
| 3965 | case 0x0fb4: |
| 3966 | tmpu8 = I386_FS_REGNUM; |
| 3967 | break; |
| 3968 | /* lgs Gv */ |
| 3969 | case 0x0fb5: |
| 3970 | tmpu8 = I386_GS_REGNUM; |
| 3971 | break; |
| 3972 | } |
| 3973 | if (record_arch_list_add_reg (ir.regcache, tmpu8)) |
| 3974 | return -1; |
| 3975 | |
| 3976 | if (record_arch_list_add_reg (ir.regcache, ir.reg)) |
| 3977 | return -1; |
| 3978 | break; |
| 3979 | |
| 3980 | /* shifts */ |
| 3981 | case 0xc0: |
| 3982 | case 0xc1: |
| 3983 | case 0xd0: |
| 3984 | case 0xd1: |
| 3985 | case 0xd2: |
| 3986 | case 0xd3: |
| 3987 | if ((opcode & 1) == 0) |
| 3988 | ir.ot = OT_BYTE; |
| 3989 | else |
| 3990 | ir.ot = ir.dflag + OT_WORD; |
| 3991 | |
| 3992 | if (i386_record_modrm (&ir)) |
| 3993 | return -1; |
| 3994 | |
| 3995 | if (ir.mod != 3 && (opcode == 0xd2 || opcode == 0xd3)) |
| 3996 | { |
| 3997 | if (i386_record_lea_modrm (&ir)) |
| 3998 | return -1; |
| 3999 | } |
| 4000 | else |
| 4001 | { |
| 4002 | if (ir.ot == OT_BYTE) |
| 4003 | ir.rm &= 0x3; |
| 4004 | if (record_arch_list_add_reg (ir.regcache, ir.rm)) |
| 4005 | return -1; |
| 4006 | } |
| 4007 | |
| 4008 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 4009 | return -1; |
| 4010 | break; |
| 4011 | |
| 4012 | case 0x0fa4: |
| 4013 | case 0x0fa5: |
| 4014 | case 0x0fac: |
| 4015 | case 0x0fad: |
| 4016 | if (i386_record_modrm (&ir)) |
| 4017 | return -1; |
| 4018 | if (ir.mod == 3) |
| 4019 | { |
| 4020 | if (record_arch_list_add_reg (ir.regcache, ir.rm)) |
| 4021 | return -1; |
| 4022 | } |
| 4023 | else |
| 4024 | { |
| 4025 | if (i386_record_lea_modrm (&ir)) |
| 4026 | return -1; |
| 4027 | } |
| 4028 | break; |
| 4029 | |
| 4030 | /* floats */ |
| 4031 | /* It just record the memory change of instrcution. */ |
| 4032 | case 0xd8: |
| 4033 | case 0xd9: |
| 4034 | case 0xda: |
| 4035 | case 0xdb: |
| 4036 | case 0xdc: |
| 4037 | case 0xdd: |
| 4038 | case 0xde: |
| 4039 | case 0xdf: |
| 4040 | if (i386_record_modrm (&ir)) |
| 4041 | return -1; |
| 4042 | ir.reg |= ((opcode & 7) << 3); |
| 4043 | if (ir.mod != 3) |
| 4044 | { |
| 4045 | /* memory */ |
| 4046 | uint32_t addr; |
| 4047 | |
| 4048 | if (i386_record_lea_modrm_addr (&ir, &addr)) |
| 4049 | return -1; |
| 4050 | switch (ir.reg) |
| 4051 | { |
| 4052 | case 0x00: |
| 4053 | case 0x01: |
| 4054 | case 0x02: |
| 4055 | case 0x03: |
| 4056 | case 0x04: |
| 4057 | case 0x05: |
| 4058 | case 0x06: |
| 4059 | case 0x07: |
| 4060 | case 0x10: |
| 4061 | case 0x11: |
| 4062 | case 0x12: |
| 4063 | case 0x13: |
| 4064 | case 0x14: |
| 4065 | case 0x15: |
| 4066 | case 0x16: |
| 4067 | case 0x17: |
| 4068 | case 0x20: |
| 4069 | case 0x21: |
| 4070 | case 0x22: |
| 4071 | case 0x23: |
| 4072 | case 0x24: |
| 4073 | case 0x25: |
| 4074 | case 0x26: |
| 4075 | case 0x27: |
| 4076 | case 0x30: |
| 4077 | case 0x31: |
| 4078 | case 0x32: |
| 4079 | case 0x33: |
| 4080 | case 0x34: |
| 4081 | case 0x35: |
| 4082 | case 0x36: |
| 4083 | case 0x37: |
| 4084 | break; |
| 4085 | case 0x08: |
| 4086 | case 0x0a: |
| 4087 | case 0x0b: |
| 4088 | case 0x18: |
| 4089 | case 0x19: |
| 4090 | case 0x1a: |
| 4091 | case 0x1b: |
| 4092 | case 0x28: |
| 4093 | case 0x29: |
| 4094 | case 0x2a: |
| 4095 | case 0x2b: |
| 4096 | case 0x38: |
| 4097 | case 0x39: |
| 4098 | case 0x3a: |
| 4099 | case 0x3b: |
| 4100 | switch (ir.reg & 7) |
| 4101 | { |
| 4102 | case 0: |
| 4103 | break; |
| 4104 | case 1: |
| 4105 | switch (ir.reg >> 4) |
| 4106 | { |
| 4107 | case 0: |
| 4108 | if (record_arch_list_add_mem (addr, 4)) |
| 4109 | return -1; |
| 4110 | break; |
| 4111 | case 2: |
| 4112 | if (record_arch_list_add_mem (addr, 8)) |
| 4113 | return -1; |
| 4114 | break; |
| 4115 | case 3: |
| 4116 | default: |
| 4117 | if (record_arch_list_add_mem (addr, 2)) |
| 4118 | return -1; |
| 4119 | break; |
| 4120 | } |
| 4121 | break; |
| 4122 | default: |
| 4123 | switch (ir.reg >> 4) |
| 4124 | { |
| 4125 | case 0: |
| 4126 | case 1: |
| 4127 | if (record_arch_list_add_mem (addr, 4)) |
| 4128 | return -1; |
| 4129 | break; |
| 4130 | case 2: |
| 4131 | if (record_arch_list_add_mem (addr, 8)) |
| 4132 | return -1; |
| 4133 | break; |
| 4134 | case 3: |
| 4135 | default: |
| 4136 | if (record_arch_list_add_mem (addr, 2)) |
| 4137 | return -1; |
| 4138 | break; |
| 4139 | } |
| 4140 | break; |
| 4141 | } |
| 4142 | break; |
| 4143 | case 0x0c: |
| 4144 | case 0x0d: |
| 4145 | case 0x1d: |
| 4146 | case 0x2c: |
| 4147 | case 0x3c: |
| 4148 | case 0x3d: |
| 4149 | break; |
| 4150 | case 0x0e: |
| 4151 | if (ir.dflag) |
| 4152 | { |
| 4153 | if (record_arch_list_add_mem (addr, 28)) |
| 4154 | return -1; |
| 4155 | } |
| 4156 | else |
| 4157 | { |
| 4158 | if (record_arch_list_add_mem (addr, 14)) |
| 4159 | return -1; |
| 4160 | } |
| 4161 | break; |
| 4162 | case 0x0f: |
| 4163 | case 0x2f: |
| 4164 | if (record_arch_list_add_mem (addr, 2)) |
| 4165 | return -1; |
| 4166 | break; |
| 4167 | case 0x1f: |
| 4168 | case 0x3e: |
| 4169 | if (record_arch_list_add_mem (addr, 10)) |
| 4170 | return -1; |
| 4171 | break; |
| 4172 | case 0x2e: |
| 4173 | if (ir.dflag) |
| 4174 | { |
| 4175 | if (record_arch_list_add_mem (addr, 28)) |
| 4176 | return -1; |
| 4177 | addr += 28; |
| 4178 | } |
| 4179 | else |
| 4180 | { |
| 4181 | if (record_arch_list_add_mem (addr, 14)) |
| 4182 | return -1; |
| 4183 | addr += 14; |
| 4184 | } |
| 4185 | if (record_arch_list_add_mem (addr, 80)) |
| 4186 | return -1; |
| 4187 | break; |
| 4188 | case 0x3f: |
| 4189 | if (record_arch_list_add_mem (addr, 8)) |
| 4190 | return -1; |
| 4191 | break; |
| 4192 | default: |
| 4193 | ir.addr -= 2; |
| 4194 | opcode = opcode << 8 | ir.modrm; |
| 4195 | goto no_support; |
| 4196 | break; |
| 4197 | } |
| 4198 | } |
| 4199 | break; |
| 4200 | |
| 4201 | /* string ops */ |
| 4202 | /* movsS */ |
| 4203 | case 0xa4: |
| 4204 | case 0xa5: |
| 4205 | /* stosS */ |
| 4206 | case 0xaa: |
| 4207 | case 0xab: |
| 4208 | /* insS */ |
| 4209 | case 0x6c: |
| 4210 | case 0x6d: |
| 4211 | { |
| 4212 | uint32_t addr; |
| 4213 | |
| 4214 | if ((opcode & 1) == 0) |
| 4215 | ir.ot = OT_BYTE; |
| 4216 | else |
| 4217 | ir.ot = ir.dflag + OT_WORD; |
| 4218 | if (opcode == 0xa4 || opcode == 0xa5) |
| 4219 | { |
| 4220 | if (record_arch_list_add_reg (ir.regcache, I386_ESI_REGNUM)) |
| 4221 | return -1; |
| 4222 | } |
| 4223 | if (record_arch_list_add_reg (ir.regcache, I386_EDI_REGNUM)) |
| 4224 | return -1; |
| 4225 | |
| 4226 | regcache_raw_read (ir.regcache, I386_EDI_REGNUM, |
| 4227 | (gdb_byte *) & addr); |
| 4228 | if (!ir.aflag) |
| 4229 | { |
| 4230 | addr &= 0xffff; |
| 4231 | /* addr += ((uint32_t)read_register (I386_ES_REGNUM)) << 4; */ |
| 4232 | if (record_debug) |
| 4233 | printf_unfiltered (_("Process record ignores the memory change " |
| 4234 | "of instruction at address 0x%s because " |
| 4235 | "it can't get the value of the segment " |
| 4236 | "register.\n"), |
| 4237 | paddr_nz (ir.addr)); |
| 4238 | } |
| 4239 | |
| 4240 | if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) |
| 4241 | { |
| 4242 | uint32_t count; |
| 4243 | |
| 4244 | regcache_raw_read (ir.regcache, I386_ECX_REGNUM, |
| 4245 | (gdb_byte *) & count); |
| 4246 | if (!ir.aflag) |
| 4247 | count &= 0xffff; |
| 4248 | |
| 4249 | regcache_raw_read (ir.regcache, I386_EFLAGS_REGNUM, |
| 4250 | (gdb_byte *) & tmpu32); |
| 4251 | if ((tmpu32 >> 10) & 0x1) |
| 4252 | addr -= (count - 1) * (1 << ir.ot); |
| 4253 | |
| 4254 | if (ir.aflag) |
| 4255 | { |
| 4256 | if (record_arch_list_add_mem (addr, count * (1 << ir.ot))) |
| 4257 | return -1; |
| 4258 | } |
| 4259 | |
| 4260 | if (record_arch_list_add_reg (ir.regcache, I386_ECX_REGNUM)) |
| 4261 | return -1; |
| 4262 | } |
| 4263 | else |
| 4264 | { |
| 4265 | if (ir.aflag) |
| 4266 | { |
| 4267 | if (record_arch_list_add_mem (addr, 1 << ir.ot)) |
| 4268 | return -1; |
| 4269 | } |
| 4270 | } |
| 4271 | } |
| 4272 | break; |
| 4273 | |
| 4274 | /* lodsS */ |
| 4275 | case 0xac: |
| 4276 | case 0xad: |
| 4277 | if (record_arch_list_add_reg (ir.regcache, I386_EAX_REGNUM)) |
| 4278 | return -1; |
| 4279 | if (record_arch_list_add_reg (ir.regcache, I386_ESI_REGNUM)) |
| 4280 | return -1; |
| 4281 | if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) |
| 4282 | { |
| 4283 | if (record_arch_list_add_reg (ir.regcache, I386_ECX_REGNUM)) |
| 4284 | return -1; |
| 4285 | } |
| 4286 | break; |
| 4287 | |
| 4288 | /* outsS */ |
| 4289 | case 0x6e: |
| 4290 | case 0x6f: |
| 4291 | if (record_arch_list_add_reg (ir.regcache, I386_ESI_REGNUM)) |
| 4292 | return -1; |
| 4293 | if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) |
| 4294 | { |
| 4295 | if (record_arch_list_add_reg (ir.regcache, I386_ECX_REGNUM)) |
| 4296 | return -1; |
| 4297 | } |
| 4298 | break; |
| 4299 | |
| 4300 | /* scasS */ |
| 4301 | case 0xae: |
| 4302 | case 0xaf: |
| 4303 | if (record_arch_list_add_reg (ir.regcache, I386_EDI_REGNUM)) |
| 4304 | return -1; |
| 4305 | if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) |
| 4306 | { |
| 4307 | if (record_arch_list_add_reg (ir.regcache, I386_ECX_REGNUM)) |
| 4308 | return -1; |
| 4309 | } |
| 4310 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 4311 | return -1; |
| 4312 | break; |
| 4313 | |
| 4314 | /* cmpsS */ |
| 4315 | case 0xa6: |
| 4316 | case 0xa7: |
| 4317 | if (record_arch_list_add_reg (ir.regcache, I386_EDI_REGNUM)) |
| 4318 | return -1; |
| 4319 | if (record_arch_list_add_reg (ir.regcache, I386_ESI_REGNUM)) |
| 4320 | return -1; |
| 4321 | if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) |
| 4322 | { |
| 4323 | if (record_arch_list_add_reg (ir.regcache, I386_ECX_REGNUM)) |
| 4324 | return -1; |
| 4325 | } |
| 4326 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 4327 | return -1; |
| 4328 | break; |
| 4329 | |
| 4330 | /* port I/O */ |
| 4331 | case 0xe4: |
| 4332 | case 0xe5: |
| 4333 | case 0xec: |
| 4334 | case 0xed: |
| 4335 | if (record_arch_list_add_reg (ir.regcache, I386_EAX_REGNUM)) |
| 4336 | return -1; |
| 4337 | break; |
| 4338 | |
| 4339 | case 0xe6: |
| 4340 | case 0xe7: |
| 4341 | case 0xee: |
| 4342 | case 0xef: |
| 4343 | break; |
| 4344 | |
| 4345 | /* control */ |
| 4346 | /* ret im */ |
| 4347 | case 0xc2: |
| 4348 | /* ret */ |
| 4349 | case 0xc3: |
| 4350 | /* lret im */ |
| 4351 | case 0xca: |
| 4352 | /* lret */ |
| 4353 | case 0xcb: |
| 4354 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 4355 | return -1; |
| 4356 | if (record_arch_list_add_reg (ir.regcache, I386_CS_REGNUM)) |
| 4357 | return -1; |
| 4358 | break; |
| 4359 | |
| 4360 | /* iret */ |
| 4361 | case 0xcf: |
| 4362 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 4363 | return -1; |
| 4364 | if (record_arch_list_add_reg (ir.regcache, I386_CS_REGNUM)) |
| 4365 | return -1; |
| 4366 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 4367 | return -1; |
| 4368 | break; |
| 4369 | |
| 4370 | /* call im */ |
| 4371 | case 0xe8: |
| 4372 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 4373 | return -1; |
| 4374 | regcache_raw_read (ir.regcache, I386_ESP_REGNUM, |
| 4375 | (gdb_byte *) & tmpu32); |
| 4376 | if (record_arch_list_add_mem |
| 4377 | ((CORE_ADDR) tmpu32 - (1 << (ir.dflag + 1)), (1 << (ir.dflag + 1)))) |
| 4378 | return -1; |
| 4379 | break; |
| 4380 | |
| 4381 | /* lcall im */ |
| 4382 | case 0x9a: |
| 4383 | if (record_arch_list_add_reg (ir.regcache, I386_CS_REGNUM)) |
| 4384 | return -1; |
| 4385 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 4386 | return -1; |
| 4387 | regcache_raw_read (ir.regcache, I386_ESP_REGNUM, |
| 4388 | (gdb_byte *) & tmpu32); |
| 4389 | if (record_arch_list_add_mem |
| 4390 | ((CORE_ADDR) tmpu32 - (1 << (ir.dflag + 2)), (1 << (ir.dflag + 2)))) |
| 4391 | return -1; |
| 4392 | break; |
| 4393 | |
| 4394 | /* jmp im */ |
| 4395 | case 0xe9: |
| 4396 | /* ljmp im */ |
| 4397 | case 0xea: |
| 4398 | /* jmp Jb */ |
| 4399 | case 0xeb: |
| 4400 | /* jcc Jb */ |
| 4401 | case 0x70: |
| 4402 | case 0x71: |
| 4403 | case 0x72: |
| 4404 | case 0x73: |
| 4405 | case 0x74: |
| 4406 | case 0x75: |
| 4407 | case 0x76: |
| 4408 | case 0x77: |
| 4409 | case 0x78: |
| 4410 | case 0x79: |
| 4411 | case 0x7a: |
| 4412 | case 0x7b: |
| 4413 | case 0x7c: |
| 4414 | case 0x7d: |
| 4415 | case 0x7e: |
| 4416 | case 0x7f: |
| 4417 | /* jcc Jv */ |
| 4418 | case 0x0f80: |
| 4419 | case 0x0f81: |
| 4420 | case 0x0f82: |
| 4421 | case 0x0f83: |
| 4422 | case 0x0f84: |
| 4423 | case 0x0f85: |
| 4424 | case 0x0f86: |
| 4425 | case 0x0f87: |
| 4426 | case 0x0f88: |
| 4427 | case 0x0f89: |
| 4428 | case 0x0f8a: |
| 4429 | case 0x0f8b: |
| 4430 | case 0x0f8c: |
| 4431 | case 0x0f8d: |
| 4432 | case 0x0f8e: |
| 4433 | case 0x0f8f: |
| 4434 | break; |
| 4435 | |
| 4436 | /* setcc Gv */ |
| 4437 | case 0x0f90: |
| 4438 | case 0x0f91: |
| 4439 | case 0x0f92: |
| 4440 | case 0x0f93: |
| 4441 | case 0x0f94: |
| 4442 | case 0x0f95: |
| 4443 | case 0x0f96: |
| 4444 | case 0x0f97: |
| 4445 | case 0x0f98: |
| 4446 | case 0x0f99: |
| 4447 | case 0x0f9a: |
| 4448 | case 0x0f9b: |
| 4449 | case 0x0f9c: |
| 4450 | case 0x0f9d: |
| 4451 | case 0x0f9e: |
| 4452 | case 0x0f9f: |
| 4453 | ir.ot = OT_BYTE; |
| 4454 | if (i386_record_modrm (&ir)) |
| 4455 | return -1; |
| 4456 | if (ir.mod == 3) |
| 4457 | { |
| 4458 | if (record_arch_list_add_reg (ir.regcache, ir.rm & 0x3)) |
| 4459 | return -1; |
| 4460 | } |
| 4461 | else |
| 4462 | { |
| 4463 | if (i386_record_lea_modrm (&ir)) |
| 4464 | return -1; |
| 4465 | } |
| 4466 | break; |
| 4467 | |
| 4468 | /* cmov Gv, Ev */ |
| 4469 | case 0x0f40: |
| 4470 | case 0x0f41: |
| 4471 | case 0x0f42: |
| 4472 | case 0x0f43: |
| 4473 | case 0x0f44: |
| 4474 | case 0x0f45: |
| 4475 | case 0x0f46: |
| 4476 | case 0x0f47: |
| 4477 | case 0x0f48: |
| 4478 | case 0x0f49: |
| 4479 | case 0x0f4a: |
| 4480 | case 0x0f4b: |
| 4481 | case 0x0f4c: |
| 4482 | case 0x0f4d: |
| 4483 | case 0x0f4e: |
| 4484 | case 0x0f4f: |
| 4485 | if (i386_record_modrm (&ir)) |
| 4486 | return -1; |
| 4487 | if (ir.dflag == OT_BYTE) |
| 4488 | ir.reg &= 0x3; |
| 4489 | if (record_arch_list_add_reg (ir.regcache, ir.reg & 0x3)) |
| 4490 | return -1; |
| 4491 | break; |
| 4492 | |
| 4493 | /* flags */ |
| 4494 | /* pushf */ |
| 4495 | case 0x9c: |
| 4496 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 4497 | return -1; |
| 4498 | regcache_raw_read (ir.regcache, I386_ESP_REGNUM, |
| 4499 | (gdb_byte *) & tmpu32); |
| 4500 | if (record_arch_list_add_mem |
| 4501 | ((CORE_ADDR) tmpu32 - (1 << (ir.dflag + 1)), (1 << (ir.dflag + 1)))) |
| 4502 | return -1; |
| 4503 | break; |
| 4504 | |
| 4505 | /* popf */ |
| 4506 | case 0x9d: |
| 4507 | if (record_arch_list_add_reg (ir.regcache, I386_ESP_REGNUM)) |
| 4508 | return -1; |
| 4509 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 4510 | return -1; |
| 4511 | break; |
| 4512 | |
| 4513 | /* sahf */ |
| 4514 | case 0x9e: |
| 4515 | /* cmc */ |
| 4516 | case 0xf5: |
| 4517 | /* clc */ |
| 4518 | case 0xf8: |
| 4519 | /* stc */ |
| 4520 | case 0xf9: |
| 4521 | /* cld */ |
| 4522 | case 0xfc: |
| 4523 | /* std */ |
| 4524 | case 0xfd: |
| 4525 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 4526 | return -1; |
| 4527 | break; |
| 4528 | |
| 4529 | /* lahf */ |
| 4530 | case 0x9f: |
| 4531 | if (record_arch_list_add_reg (ir.regcache, I386_EAX_REGNUM)) |
| 4532 | return -1; |
| 4533 | break; |
| 4534 | |
| 4535 | /* bit operations */ |
| 4536 | /* bt/bts/btr/btc Gv, im */ |
| 4537 | case 0x0fba: |
| 4538 | /* bts */ |
| 4539 | case 0x0fab: |
| 4540 | /* btr */ |
| 4541 | case 0x0fb3: |
| 4542 | /* btc */ |
| 4543 | case 0x0fbb: |
| 4544 | ir.ot = ir.dflag + OT_WORD; |
| 4545 | if (i386_record_modrm (&ir)) |
| 4546 | return -1; |
| 4547 | if (ir.reg < 4) |
| 4548 | { |
| 4549 | ir.addr -= 3; |
| 4550 | opcode = opcode << 8 | ir.modrm; |
| 4551 | goto no_support; |
| 4552 | } |
| 4553 | ir.reg -= 4; |
| 4554 | if (ir.reg != 0) |
| 4555 | { |
| 4556 | if (ir.mod != 3) |
| 4557 | { |
| 4558 | if (i386_record_lea_modrm (&ir)) |
| 4559 | return -1; |
| 4560 | } |
| 4561 | else |
| 4562 | { |
| 4563 | if (record_arch_list_add_reg (ir.regcache, ir.rm)) |
| 4564 | return -1; |
| 4565 | } |
| 4566 | } |
| 4567 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 4568 | return -1; |
| 4569 | break; |
| 4570 | |
| 4571 | /* bt Gv, Ev */ |
| 4572 | case 0x0fa3: |
| 4573 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 4574 | return -1; |
| 4575 | break; |
| 4576 | |
| 4577 | /* bsf */ |
| 4578 | case 0x0fbc: |
| 4579 | /* bsr */ |
| 4580 | case 0x0fbd: |
| 4581 | if (record_arch_list_add_reg (ir.regcache, ir.reg)) |
| 4582 | return -1; |
| 4583 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 4584 | return -1; |
| 4585 | break; |
| 4586 | |
| 4587 | /* bcd */ |
| 4588 | /* daa */ |
| 4589 | case 0x27: |
| 4590 | /* das */ |
| 4591 | case 0x2f: |
| 4592 | /* aaa */ |
| 4593 | case 0x37: |
| 4594 | /* aas */ |
| 4595 | case 0x3f: |
| 4596 | /* aam */ |
| 4597 | case 0xd4: |
| 4598 | /* aad */ |
| 4599 | case 0xd5: |
| 4600 | if (record_arch_list_add_reg (ir.regcache, I386_EAX_REGNUM)) |
| 4601 | return -1; |
| 4602 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 4603 | return -1; |
| 4604 | break; |
| 4605 | |
| 4606 | /* misc */ |
| 4607 | /* nop */ |
| 4608 | case 0x90: |
| 4609 | if (prefixes & PREFIX_LOCK) |
| 4610 | { |
| 4611 | ir.addr -= 1; |
| 4612 | goto no_support; |
| 4613 | } |
| 4614 | break; |
| 4615 | |
| 4616 | /* fwait */ |
| 4617 | /* XXX */ |
| 4618 | case 0x9b: |
| 4619 | printf_unfiltered (_("Process record doesn't support instruction " |
| 4620 | "fwait.\n")); |
| 4621 | ir.addr -= 1; |
| 4622 | goto no_support; |
| 4623 | break; |
| 4624 | |
| 4625 | /* int3 */ |
| 4626 | /* XXX */ |
| 4627 | case 0xcc: |
| 4628 | printf_unfiltered (_("Process record doesn't support instruction " |
| 4629 | "int3.\n")); |
| 4630 | ir.addr -= 1; |
| 4631 | goto no_support; |
| 4632 | break; |
| 4633 | |
| 4634 | /* int */ |
| 4635 | /* XXX */ |
| 4636 | case 0xcd: |
| 4637 | { |
| 4638 | int ret; |
| 4639 | if (target_read_memory (ir.addr, &tmpu8, 1)) |
| 4640 | { |
| 4641 | if (record_debug) |
| 4642 | printf_unfiltered (_("Process record: error reading memory " |
| 4643 | "at addr 0x%s len = 1.\n"), |
| 4644 | paddr_nz (ir.addr)); |
| 4645 | return -1; |
| 4646 | } |
| 4647 | ir.addr++; |
| 4648 | if (tmpu8 != 0x80 |
| 4649 | || gdbarch_tdep (gdbarch)->i386_intx80_record == NULL) |
| 4650 | { |
| 4651 | printf_unfiltered (_("Process record doesn't support " |
| 4652 | "instruction int 0x%02x.\n"), |
| 4653 | tmpu8); |
| 4654 | ir.addr -= 2; |
| 4655 | goto no_support; |
| 4656 | } |
| 4657 | ret = gdbarch_tdep (gdbarch)->i386_intx80_record (ir.regcache); |
| 4658 | if (ret) |
| 4659 | return ret; |
| 4660 | } |
| 4661 | break; |
| 4662 | |
| 4663 | /* into */ |
| 4664 | /* XXX */ |
| 4665 | case 0xce: |
| 4666 | printf_unfiltered (_("Process record doesn't support " |
| 4667 | "instruction into.\n")); |
| 4668 | ir.addr -= 1; |
| 4669 | goto no_support; |
| 4670 | break; |
| 4671 | |
| 4672 | /* cli */ |
| 4673 | case 0xfa: |
| 4674 | /* sti */ |
| 4675 | case 0xfb: |
| 4676 | break; |
| 4677 | |
| 4678 | /* bound */ |
| 4679 | case 0x62: |
| 4680 | printf_unfiltered (_("Process record doesn't support " |
| 4681 | "instruction bound.\n")); |
| 4682 | ir.addr -= 1; |
| 4683 | goto no_support; |
| 4684 | break; |
| 4685 | |
| 4686 | /* bswap reg */ |
| 4687 | case 0x0fc8: |
| 4688 | case 0x0fc9: |
| 4689 | case 0x0fca: |
| 4690 | case 0x0fcb: |
| 4691 | case 0x0fcc: |
| 4692 | case 0x0fcd: |
| 4693 | case 0x0fce: |
| 4694 | case 0x0fcf: |
| 4695 | if (record_arch_list_add_reg (ir.regcache, opcode & 7)) |
| 4696 | return -1; |
| 4697 | break; |
| 4698 | |
| 4699 | /* salc */ |
| 4700 | case 0xd6: |
| 4701 | if (record_arch_list_add_reg (ir.regcache, I386_EAX_REGNUM)) |
| 4702 | return -1; |
| 4703 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 4704 | return -1; |
| 4705 | break; |
| 4706 | |
| 4707 | /* loopnz */ |
| 4708 | case 0xe0: |
| 4709 | /* loopz */ |
| 4710 | case 0xe1: |
| 4711 | /* loop */ |
| 4712 | case 0xe2: |
| 4713 | /* jecxz */ |
| 4714 | case 0xe3: |
| 4715 | if (record_arch_list_add_reg (ir.regcache, I386_ECX_REGNUM)) |
| 4716 | return -1; |
| 4717 | break; |
| 4718 | |
| 4719 | /* wrmsr */ |
| 4720 | case 0x0f30: |
| 4721 | printf_unfiltered (_("Process record doesn't support " |
| 4722 | "instruction wrmsr.\n")); |
| 4723 | ir.addr -= 2; |
| 4724 | goto no_support; |
| 4725 | break; |
| 4726 | |
| 4727 | /* rdmsr */ |
| 4728 | case 0x0f32: |
| 4729 | printf_unfiltered (_("Process record doesn't support " |
| 4730 | "instruction rdmsr.\n")); |
| 4731 | ir.addr -= 2; |
| 4732 | goto no_support; |
| 4733 | break; |
| 4734 | |
| 4735 | /* rdtsc */ |
| 4736 | case 0x0f31: |
| 4737 | printf_unfiltered (_("Process record doesn't support " |
| 4738 | "instruction rdtsc.\n")); |
| 4739 | ir.addr -= 2; |
| 4740 | goto no_support; |
| 4741 | break; |
| 4742 | |
| 4743 | /* sysenter */ |
| 4744 | case 0x0f34: |
| 4745 | { |
| 4746 | int ret; |
| 4747 | if (gdbarch_tdep (gdbarch)->i386_sysenter_record == NULL) |
| 4748 | { |
| 4749 | printf_unfiltered (_("Process record doesn't support " |
| 4750 | "instruction sysenter.\n")); |
| 4751 | ir.addr -= 2; |
| 4752 | goto no_support; |
| 4753 | } |
| 4754 | ret = gdbarch_tdep (gdbarch)->i386_sysenter_record (ir.regcache); |
| 4755 | if (ret) |
| 4756 | return ret; |
| 4757 | } |
| 4758 | break; |
| 4759 | |
| 4760 | /* sysexit */ |
| 4761 | case 0x0f35: |
| 4762 | printf_unfiltered (_("Process record doesn't support " |
| 4763 | "instruction sysexit.\n")); |
| 4764 | ir.addr -= 2; |
| 4765 | goto no_support; |
| 4766 | break; |
| 4767 | |
| 4768 | /* cpuid */ |
| 4769 | case 0x0fa2: |
| 4770 | if (record_arch_list_add_reg (ir.regcache, I386_EAX_REGNUM)) |
| 4771 | return -1; |
| 4772 | if (record_arch_list_add_reg (ir.regcache, I386_ECX_REGNUM)) |
| 4773 | return -1; |
| 4774 | if (record_arch_list_add_reg (ir.regcache, I386_EDX_REGNUM)) |
| 4775 | return -1; |
| 4776 | if (record_arch_list_add_reg (ir.regcache, I386_EBX_REGNUM)) |
| 4777 | return -1; |
| 4778 | break; |
| 4779 | |
| 4780 | /* hlt */ |
| 4781 | case 0xf4: |
| 4782 | printf_unfiltered (_("Process record doesn't support " |
| 4783 | "instruction hlt.\n")); |
| 4784 | ir.addr -= 1; |
| 4785 | goto no_support; |
| 4786 | break; |
| 4787 | |
| 4788 | case 0x0f00: |
| 4789 | if (i386_record_modrm (&ir)) |
| 4790 | return -1; |
| 4791 | switch (ir.reg) |
| 4792 | { |
| 4793 | /* sldt */ |
| 4794 | case 0: |
| 4795 | /* str */ |
| 4796 | case 1: |
| 4797 | if (ir.mod == 3) |
| 4798 | { |
| 4799 | if (record_arch_list_add_reg (ir.regcache, ir.rm)) |
| 4800 | return -1; |
| 4801 | } |
| 4802 | else |
| 4803 | { |
| 4804 | ir.ot = OT_WORD; |
| 4805 | if (i386_record_lea_modrm (&ir)) |
| 4806 | return -1; |
| 4807 | } |
| 4808 | break; |
| 4809 | /* lldt */ |
| 4810 | case 2: |
| 4811 | /* ltr */ |
| 4812 | case 3: |
| 4813 | break; |
| 4814 | /* verr */ |
| 4815 | case 4: |
| 4816 | /* verw */ |
| 4817 | case 5: |
| 4818 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 4819 | return -1; |
| 4820 | break; |
| 4821 | default: |
| 4822 | ir.addr -= 3; |
| 4823 | opcode = opcode << 8 | ir.modrm; |
| 4824 | goto no_support; |
| 4825 | break; |
| 4826 | } |
| 4827 | break; |
| 4828 | |
| 4829 | case 0x0f01: |
| 4830 | if (i386_record_modrm (&ir)) |
| 4831 | return -1; |
| 4832 | switch (ir.reg) |
| 4833 | { |
| 4834 | /* sgdt */ |
| 4835 | case 0: |
| 4836 | { |
| 4837 | uint32_t addr; |
| 4838 | |
| 4839 | if (ir.mod == 3) |
| 4840 | { |
| 4841 | ir.addr -= 3; |
| 4842 | opcode = opcode << 8 | ir.modrm; |
| 4843 | goto no_support; |
| 4844 | } |
| 4845 | |
| 4846 | if (ir.override) |
| 4847 | { |
| 4848 | if (record_debug) |
| 4849 | printf_unfiltered (_("Process record ignores the memory " |
| 4850 | "change of instruction at " |
| 4851 | "address 0x%s because it can't get " |
| 4852 | "the value of the segment " |
| 4853 | "register.\n"), |
| 4854 | paddr_nz (ir.addr)); |
| 4855 | } |
| 4856 | else |
| 4857 | { |
| 4858 | if (i386_record_lea_modrm_addr (&ir, &addr)) |
| 4859 | return -1; |
| 4860 | if (record_arch_list_add_mem (addr, 2)) |
| 4861 | return -1; |
| 4862 | addr += 2; |
| 4863 | if (record_arch_list_add_mem (addr, 4)) |
| 4864 | return -1; |
| 4865 | } |
| 4866 | } |
| 4867 | break; |
| 4868 | case 1: |
| 4869 | if (ir.mod == 3) |
| 4870 | { |
| 4871 | switch (ir.rm) |
| 4872 | { |
| 4873 | /* monitor */ |
| 4874 | case 0: |
| 4875 | break; |
| 4876 | /* mwait */ |
| 4877 | case 1: |
| 4878 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 4879 | return -1; |
| 4880 | break; |
| 4881 | default: |
| 4882 | ir.addr -= 3; |
| 4883 | opcode = opcode << 8 | ir.modrm; |
| 4884 | goto no_support; |
| 4885 | break; |
| 4886 | } |
| 4887 | } |
| 4888 | else |
| 4889 | { |
| 4890 | /* sidt */ |
| 4891 | if (ir.override) |
| 4892 | { |
| 4893 | if (record_debug) |
| 4894 | printf_unfiltered (_("Process record ignores the memory " |
| 4895 | "change of instruction at " |
| 4896 | "address 0x%s because it can't get " |
| 4897 | "the value of the segment " |
| 4898 | "register.\n"), |
| 4899 | paddr_nz (ir.addr)); |
| 4900 | } |
| 4901 | else |
| 4902 | { |
| 4903 | uint32_t addr; |
| 4904 | |
| 4905 | if (i386_record_lea_modrm_addr (&ir, &addr)) |
| 4906 | return -1; |
| 4907 | if (record_arch_list_add_mem (addr, 2)) |
| 4908 | return -1; |
| 4909 | addr += 2; |
| 4910 | if (record_arch_list_add_mem (addr, 4)) |
| 4911 | return -1; |
| 4912 | } |
| 4913 | } |
| 4914 | break; |
| 4915 | /* lgdt */ |
| 4916 | case 2: |
| 4917 | /* lidt */ |
| 4918 | case 3: |
| 4919 | /* invlpg */ |
| 4920 | case 7: |
| 4921 | default: |
| 4922 | if (ir.mod == 3) |
| 4923 | { |
| 4924 | ir.addr -= 3; |
| 4925 | opcode = opcode << 8 | ir.modrm; |
| 4926 | goto no_support; |
| 4927 | } |
| 4928 | break; |
| 4929 | /* smsw */ |
| 4930 | case 4: |
| 4931 | if (ir.mod == 3) |
| 4932 | { |
| 4933 | if (record_arch_list_add_reg (ir.regcache, ir.rm)) |
| 4934 | return -1; |
| 4935 | } |
| 4936 | else |
| 4937 | { |
| 4938 | ir.ot = OT_WORD; |
| 4939 | if (i386_record_lea_modrm (&ir)) |
| 4940 | return -1; |
| 4941 | } |
| 4942 | break; |
| 4943 | /* lmsw */ |
| 4944 | case 6: |
| 4945 | break; |
| 4946 | } |
| 4947 | break; |
| 4948 | |
| 4949 | /* invd */ |
| 4950 | case 0x0f08: |
| 4951 | /* wbinvd */ |
| 4952 | case 0x0f09: |
| 4953 | break; |
| 4954 | |
| 4955 | /* arpl */ |
| 4956 | case 0x63: |
| 4957 | ir.ot = ir.dflag ? OT_LONG : OT_WORD; |
| 4958 | if (i386_record_modrm (&ir)) |
| 4959 | return -1; |
| 4960 | if (ir.mod != 3) |
| 4961 | { |
| 4962 | if (i386_record_lea_modrm (&ir)) |
| 4963 | return -1; |
| 4964 | } |
| 4965 | else |
| 4966 | { |
| 4967 | if (record_arch_list_add_reg (ir.regcache, ir.rm)) |
| 4968 | return -1; |
| 4969 | } |
| 4970 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 4971 | return -1; |
| 4972 | break; |
| 4973 | |
| 4974 | /* lar */ |
| 4975 | case 0x0f02: |
| 4976 | /* lsl */ |
| 4977 | case 0x0f03: |
| 4978 | if (i386_record_modrm (&ir)) |
| 4979 | return -1; |
| 4980 | if (record_arch_list_add_reg (ir.regcache, ir.reg)) |
| 4981 | return -1; |
| 4982 | if (record_arch_list_add_reg (ir.regcache, I386_EFLAGS_REGNUM)) |
| 4983 | return -1; |
| 4984 | break; |
| 4985 | |
| 4986 | case 0x0f18: |
| 4987 | break; |
| 4988 | |
| 4989 | /* nop (multi byte) */ |
| 4990 | case 0x0f19: |
| 4991 | case 0x0f1a: |
| 4992 | case 0x0f1b: |
| 4993 | case 0x0f1c: |
| 4994 | case 0x0f1d: |
| 4995 | case 0x0f1e: |
| 4996 | case 0x0f1f: |
| 4997 | break; |
| 4998 | |
| 4999 | /* mov reg, crN */ |
| 5000 | case 0x0f20: |
| 5001 | /* mov crN, reg */ |
| 5002 | case 0x0f22: |
| 5003 | if (i386_record_modrm (&ir)) |
| 5004 | return -1; |
| 5005 | if ((ir.modrm & 0xc0) != 0xc0) |
| 5006 | { |
| 5007 | ir.addr -= 2; |
| 5008 | opcode = opcode << 8 | ir.modrm; |
| 5009 | goto no_support; |
| 5010 | } |
| 5011 | switch (ir.reg) |
| 5012 | { |
| 5013 | case 0: |
| 5014 | case 2: |
| 5015 | case 3: |
| 5016 | case 4: |
| 5017 | case 8: |
| 5018 | if (opcode & 2) |
| 5019 | { |
| 5020 | } |
| 5021 | else |
| 5022 | { |
| 5023 | if (record_arch_list_add_reg (ir.regcache, ir.rm)) |
| 5024 | return -1; |
| 5025 | } |
| 5026 | break; |
| 5027 | default: |
| 5028 | ir.addr -= 2; |
| 5029 | opcode = opcode << 8 | ir.modrm; |
| 5030 | goto no_support; |
| 5031 | break; |
| 5032 | } |
| 5033 | break; |
| 5034 | |
| 5035 | /* mov reg, drN */ |
| 5036 | case 0x0f21: |
| 5037 | /* mov drN, reg */ |
| 5038 | case 0x0f23: |
| 5039 | if (i386_record_modrm (&ir)) |
| 5040 | return -1; |
| 5041 | if ((ir.modrm & 0xc0) != 0xc0 || ir.reg == 4 |
| 5042 | || ir.reg == 5 || ir.reg >= 8) |
| 5043 | { |
| 5044 | ir.addr -= 2; |
| 5045 | opcode = opcode << 8 | ir.modrm; |
| 5046 | goto no_support; |
| 5047 | } |
| 5048 | if (opcode & 2) |
| 5049 | { |
| 5050 | } |
| 5051 | else |
| 5052 | { |
| 5053 | if (record_arch_list_add_reg (ir.regcache, ir.rm)) |
| 5054 | return -1; |
| 5055 | } |
| 5056 | break; |
| 5057 | |
| 5058 | /* clts */ |
| 5059 | case 0x0f06: |
| 5060 | break; |
| 5061 | |
| 5062 | /* MMX/SSE/SSE2/PNI support */ |
| 5063 | /* XXX */ |
| 5064 | |
| 5065 | default: |
| 5066 | if (opcode > 0xff) |
| 5067 | ir.addr -= 2; |
| 5068 | else |
| 5069 | ir.addr -= 1; |
| 5070 | goto no_support; |
| 5071 | break; |
| 5072 | } |
| 5073 | |
| 5074 | /* In the future, Maybe still need to deal with need_dasm */ |
| 5075 | if (record_arch_list_add_reg (ir.regcache, I386_EIP_REGNUM)) |
| 5076 | return -1; |
| 5077 | if (record_arch_list_add_end ()) |
| 5078 | return -1; |
| 5079 | |
| 5080 | return 0; |
| 5081 | |
| 5082 | no_support: |
| 5083 | printf_unfiltered (_("Process record doesn't support instruction 0x%02x " |
| 5084 | "at address 0x%s.\n"), |
| 5085 | (unsigned int) (opcode), paddr_nz (ir.addr)); |
| 5086 | return -1; |
| 5087 | } |
| 5088 | |
| 5089 | \f |
| 5090 | static struct gdbarch * |
| 5091 | i386_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) |
| 5092 | { |
| 5093 | struct gdbarch_tdep *tdep; |
| 5094 | struct gdbarch *gdbarch; |
| 5095 | |
| 5096 | /* If there is already a candidate, use it. */ |
| 5097 | arches = gdbarch_list_lookup_by_info (arches, &info); |
| 5098 | if (arches != NULL) |
| 5099 | return arches->gdbarch; |
| 5100 | |
| 5101 | /* Allocate space for the new architecture. */ |
| 5102 | tdep = XCALLOC (1, struct gdbarch_tdep); |
| 5103 | gdbarch = gdbarch_alloc (&info, tdep); |
| 5104 | |
| 5105 | /* General-purpose registers. */ |
| 5106 | tdep->gregset = NULL; |
| 5107 | tdep->gregset_reg_offset = NULL; |
| 5108 | tdep->gregset_num_regs = I386_NUM_GREGS; |
| 5109 | tdep->sizeof_gregset = 0; |
| 5110 | |
| 5111 | /* Floating-point registers. */ |
| 5112 | tdep->fpregset = NULL; |
| 5113 | tdep->sizeof_fpregset = I387_SIZEOF_FSAVE; |
| 5114 | |
| 5115 | /* The default settings include the FPU registers, the MMX registers |
| 5116 | and the SSE registers. This can be overridden for a specific ABI |
| 5117 | by adjusting the members `st0_regnum', `mm0_regnum' and |
| 5118 | `num_xmm_regs' of `struct gdbarch_tdep', otherwise the registers |
| 5119 | will show up in the output of "info all-registers". Ideally we |
| 5120 | should try to autodetect whether they are available, such that we |
| 5121 | can prevent "info all-registers" from displaying registers that |
| 5122 | aren't available. |
| 5123 | |
| 5124 | NOTE: kevinb/2003-07-13: ... if it's a choice between printing |
| 5125 | [the SSE registers] always (even when they don't exist) or never |
| 5126 | showing them to the user (even when they do exist), I prefer the |
| 5127 | former over the latter. */ |
| 5128 | |
| 5129 | tdep->st0_regnum = I386_ST0_REGNUM; |
| 5130 | |
| 5131 | /* The MMX registers are implemented as pseudo-registers. Put off |
| 5132 | calculating the register number for %mm0 until we know the number |
| 5133 | of raw registers. */ |
| 5134 | tdep->mm0_regnum = 0; |
| 5135 | |
| 5136 | /* I386_NUM_XREGS includes %mxcsr, so substract one. */ |
| 5137 | tdep->num_xmm_regs = I386_NUM_XREGS - 1; |
| 5138 | |
| 5139 | tdep->jb_pc_offset = -1; |
| 5140 | tdep->struct_return = pcc_struct_return; |
| 5141 | tdep->sigtramp_start = 0; |
| 5142 | tdep->sigtramp_end = 0; |
| 5143 | tdep->sigtramp_p = i386_sigtramp_p; |
| 5144 | tdep->sigcontext_addr = NULL; |
| 5145 | tdep->sc_reg_offset = NULL; |
| 5146 | tdep->sc_pc_offset = -1; |
| 5147 | tdep->sc_sp_offset = -1; |
| 5148 | |
| 5149 | /* The format used for `long double' on almost all i386 targets is |
| 5150 | the i387 extended floating-point format. In fact, of all targets |
| 5151 | in the GCC 2.95 tree, only OSF/1 does it different, and insists |
| 5152 | on having a `long double' that's not `long' at all. */ |
| 5153 | set_gdbarch_long_double_format (gdbarch, floatformats_i387_ext); |
| 5154 | |
| 5155 | /* Although the i387 extended floating-point has only 80 significant |
| 5156 | bits, a `long double' actually takes up 96, probably to enforce |
| 5157 | alignment. */ |
| 5158 | set_gdbarch_long_double_bit (gdbarch, 96); |
| 5159 | |
| 5160 | /* The default ABI includes general-purpose registers, |
| 5161 | floating-point registers, and the SSE registers. */ |
| 5162 | set_gdbarch_num_regs (gdbarch, I386_SSE_NUM_REGS); |
| 5163 | set_gdbarch_register_name (gdbarch, i386_register_name); |
| 5164 | set_gdbarch_register_type (gdbarch, i386_register_type); |
| 5165 | |
| 5166 | /* Register numbers of various important registers. */ |
| 5167 | set_gdbarch_sp_regnum (gdbarch, I386_ESP_REGNUM); /* %esp */ |
| 5168 | set_gdbarch_pc_regnum (gdbarch, I386_EIP_REGNUM); /* %eip */ |
| 5169 | set_gdbarch_ps_regnum (gdbarch, I386_EFLAGS_REGNUM); /* %eflags */ |
| 5170 | set_gdbarch_fp0_regnum (gdbarch, I386_ST0_REGNUM); /* %st(0) */ |
| 5171 | |
| 5172 | /* NOTE: kettenis/20040418: GCC does have two possible register |
| 5173 | numbering schemes on the i386: dbx and SVR4. These schemes |
| 5174 | differ in how they number %ebp, %esp, %eflags, and the |
| 5175 | floating-point registers, and are implemented by the arrays |
| 5176 | dbx_register_map[] and svr4_dbx_register_map in |
| 5177 | gcc/config/i386.c. GCC also defines a third numbering scheme in |
| 5178 | gcc/config/i386.c, which it designates as the "default" register |
| 5179 | map used in 64bit mode. This last register numbering scheme is |
| 5180 | implemented in dbx64_register_map, and is used for AMD64; see |
| 5181 | amd64-tdep.c. |
| 5182 | |
| 5183 | Currently, each GCC i386 target always uses the same register |
| 5184 | numbering scheme across all its supported debugging formats |
| 5185 | i.e. SDB (COFF), stabs and DWARF 2. This is because |
| 5186 | gcc/sdbout.c, gcc/dbxout.c and gcc/dwarf2out.c all use the |
| 5187 | DBX_REGISTER_NUMBER macro which is defined by each target's |
| 5188 | respective config header in a manner independent of the requested |
| 5189 | output debugging format. |
| 5190 | |
| 5191 | This does not match the arrangement below, which presumes that |
| 5192 | the SDB and stabs numbering schemes differ from the DWARF and |
| 5193 | DWARF 2 ones. The reason for this arrangement is that it is |
| 5194 | likely to get the numbering scheme for the target's |
| 5195 | default/native debug format right. For targets where GCC is the |
| 5196 | native compiler (FreeBSD, NetBSD, OpenBSD, GNU/Linux) or for |
| 5197 | targets where the native toolchain uses a different numbering |
| 5198 | scheme for a particular debug format (stabs-in-ELF on Solaris) |
| 5199 | the defaults below will have to be overridden, like |
| 5200 | i386_elf_init_abi() does. */ |
| 5201 | |
| 5202 | /* Use the dbx register numbering scheme for stabs and COFF. */ |
| 5203 | set_gdbarch_stab_reg_to_regnum (gdbarch, i386_dbx_reg_to_regnum); |
| 5204 | set_gdbarch_sdb_reg_to_regnum (gdbarch, i386_dbx_reg_to_regnum); |
| 5205 | |
| 5206 | /* Use the SVR4 register numbering scheme for DWARF 2. */ |
| 5207 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, i386_svr4_reg_to_regnum); |
| 5208 | |
| 5209 | /* We don't set gdbarch_stab_reg_to_regnum, since ECOFF doesn't seem to |
| 5210 | be in use on any of the supported i386 targets. */ |
| 5211 | |
| 5212 | set_gdbarch_print_float_info (gdbarch, i387_print_float_info); |
| 5213 | |
| 5214 | set_gdbarch_get_longjmp_target (gdbarch, i386_get_longjmp_target); |
| 5215 | |
| 5216 | /* Call dummy code. */ |
| 5217 | set_gdbarch_push_dummy_call (gdbarch, i386_push_dummy_call); |
| 5218 | |
| 5219 | set_gdbarch_convert_register_p (gdbarch, i386_convert_register_p); |
| 5220 | set_gdbarch_register_to_value (gdbarch, i386_register_to_value); |
| 5221 | set_gdbarch_value_to_register (gdbarch, i386_value_to_register); |
| 5222 | |
| 5223 | set_gdbarch_return_value (gdbarch, i386_return_value); |
| 5224 | |
| 5225 | set_gdbarch_skip_prologue (gdbarch, i386_skip_prologue); |
| 5226 | |
| 5227 | /* Stack grows downward. */ |
| 5228 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); |
| 5229 | |
| 5230 | set_gdbarch_breakpoint_from_pc (gdbarch, i386_breakpoint_from_pc); |
| 5231 | set_gdbarch_decr_pc_after_break (gdbarch, 1); |
| 5232 | set_gdbarch_max_insn_length (gdbarch, I386_MAX_INSN_LEN); |
| 5233 | |
| 5234 | set_gdbarch_frame_args_skip (gdbarch, 8); |
| 5235 | |
| 5236 | /* Wire in the MMX registers. */ |
| 5237 | set_gdbarch_num_pseudo_regs (gdbarch, i386_num_mmx_regs); |
| 5238 | set_gdbarch_pseudo_register_read (gdbarch, i386_pseudo_register_read); |
| 5239 | set_gdbarch_pseudo_register_write (gdbarch, i386_pseudo_register_write); |
| 5240 | |
| 5241 | set_gdbarch_print_insn (gdbarch, i386_print_insn); |
| 5242 | |
| 5243 | set_gdbarch_dummy_id (gdbarch, i386_dummy_id); |
| 5244 | |
| 5245 | set_gdbarch_unwind_pc (gdbarch, i386_unwind_pc); |
| 5246 | |
| 5247 | /* Add the i386 register groups. */ |
| 5248 | i386_add_reggroups (gdbarch); |
| 5249 | set_gdbarch_register_reggroup_p (gdbarch, i386_register_reggroup_p); |
| 5250 | |
| 5251 | /* Helper for function argument information. */ |
| 5252 | set_gdbarch_fetch_pointer_argument (gdbarch, i386_fetch_pointer_argument); |
| 5253 | |
| 5254 | /* Hook in the DWARF CFI frame unwinder. */ |
| 5255 | dwarf2_append_unwinders (gdbarch); |
| 5256 | |
| 5257 | frame_base_set_default (gdbarch, &i386_frame_base); |
| 5258 | |
| 5259 | /* Hook in ABI-specific overrides, if they have been registered. */ |
| 5260 | gdbarch_init_osabi (info, gdbarch); |
| 5261 | |
| 5262 | frame_unwind_append_unwinder (gdbarch, &i386_sigtramp_frame_unwind); |
| 5263 | frame_unwind_append_unwinder (gdbarch, &i386_frame_unwind); |
| 5264 | |
| 5265 | /* If we have a register mapping, enable the generic core file |
| 5266 | support, unless it has already been enabled. */ |
| 5267 | if (tdep->gregset_reg_offset |
| 5268 | && !gdbarch_regset_from_core_section_p (gdbarch)) |
| 5269 | set_gdbarch_regset_from_core_section (gdbarch, |
| 5270 | i386_regset_from_core_section); |
| 5271 | |
| 5272 | /* Unless support for MMX has been disabled, make %mm0 the first |
| 5273 | pseudo-register. */ |
| 5274 | if (tdep->mm0_regnum == 0) |
| 5275 | tdep->mm0_regnum = gdbarch_num_regs (gdbarch); |
| 5276 | |
| 5277 | set_gdbarch_skip_permanent_breakpoint (gdbarch, |
| 5278 | i386_skip_permanent_breakpoint); |
| 5279 | |
| 5280 | set_gdbarch_process_record (gdbarch, i386_process_record); |
| 5281 | |
| 5282 | return gdbarch; |
| 5283 | } |
| 5284 | |
| 5285 | static enum gdb_osabi |
| 5286 | i386_coff_osabi_sniffer (bfd *abfd) |
| 5287 | { |
| 5288 | if (strcmp (bfd_get_target (abfd), "coff-go32-exe") == 0 |
| 5289 | || strcmp (bfd_get_target (abfd), "coff-go32") == 0) |
| 5290 | return GDB_OSABI_GO32; |
| 5291 | |
| 5292 | return GDB_OSABI_UNKNOWN; |
| 5293 | } |
| 5294 | \f |
| 5295 | |
| 5296 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 5297 | void _initialize_i386_tdep (void); |
| 5298 | |
| 5299 | void |
| 5300 | _initialize_i386_tdep (void) |
| 5301 | { |
| 5302 | register_gdbarch_init (bfd_arch_i386, i386_gdbarch_init); |
| 5303 | |
| 5304 | /* Add the variable that controls the disassembly flavor. */ |
| 5305 | add_setshow_enum_cmd ("disassembly-flavor", no_class, valid_flavors, |
| 5306 | &disassembly_flavor, _("\ |
| 5307 | Set the disassembly flavor."), _("\ |
| 5308 | Show the disassembly flavor."), _("\ |
| 5309 | The valid values are \"att\" and \"intel\", and the default value is \"att\"."), |
| 5310 | NULL, |
| 5311 | NULL, /* FIXME: i18n: */ |
| 5312 | &setlist, &showlist); |
| 5313 | |
| 5314 | /* Add the variable that controls the convention for returning |
| 5315 | structs. */ |
| 5316 | add_setshow_enum_cmd ("struct-convention", no_class, valid_conventions, |
| 5317 | &struct_convention, _("\ |
| 5318 | Set the convention for returning small structs."), _("\ |
| 5319 | Show the convention for returning small structs."), _("\ |
| 5320 | Valid values are \"default\", \"pcc\" and \"reg\", and the default value\n\ |
| 5321 | is \"default\"."), |
| 5322 | NULL, |
| 5323 | NULL, /* FIXME: i18n: */ |
| 5324 | &setlist, &showlist); |
| 5325 | |
| 5326 | gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour, |
| 5327 | i386_coff_osabi_sniffer); |
| 5328 | |
| 5329 | gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_SVR4, |
| 5330 | i386_svr4_init_abi); |
| 5331 | gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_GO32, |
| 5332 | i386_go32_init_abi); |
| 5333 | |
| 5334 | /* Initialize the i386-specific register groups & types. */ |
| 5335 | i386_init_reggroups (); |
| 5336 | i386_init_types(); |
| 5337 | } |