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- /*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
- #include <u.h>
- #include <libc.h>
- #include <bio.h>
- #include <mach.h>
- /*
- * i386-specific debugger interface
- * also amd64 extensions
- */
- static char *i386excep(Map*, Rgetter);
- static int i386trace(Map*, uint64_t, uint64_t, uint64_t,
- Tracer);
- static uint64_t i386frame(Map*, uint64_t, uint64_t, uint64_t,
- uint64_t);
- static int i386foll(Map*, uint64_t, Rgetter, uint64_t*);
- static int i386inst(Map*, uint64_t, char, char*, int);
- static int i386das(Map*, uint64_t, char*, int);
- static int i386instlen(Map*, uint64_t);
- static char STARTSYM[] = "_main";
- static char PROFSYM[] = "_mainp";
- static char FRAMENAME[] = ".frame";
- static char *excname[] =
- {
- [0] = "divide error",
- [1] = "debug exception",
- [4] = "overflow",
- [5] = "bounds check",
- [6] = "invalid opcode",
- [7] = "math coprocessor emulation",
- [8] = "double fault",
- [9] = "math coprocessor overrun",
- [10] = "invalid TSS",
- [11] = "segment not present",
- [12] = "stack exception",
- [13] = "general protection violation",
- [14] = "page fault",
- [16] = "math coprocessor error",
- [17] = "alignment check",
- [18] = "machine check",
- [19] = "floating-point exception",
- [24] = "clock",
- [25] = "keyboard",
- [27] = "modem status",
- [28] = "serial line status",
- [30] = "floppy disk",
- [36] = "mouse",
- [37] = "math coprocessor",
- [38] = "hard disk",
- [64] = "system call",
- };
- Machdata i386mach =
- {
- {0xCC, 0, 0, 0}, /* break point: INT 3 */
- 1, /* break point size */
- leswab, /* convert short to local byte order */
- leswal, /* convert long to local byte order */
- leswav, /* convert vlong to local byte order */
- i386trace, /* C traceback */
- i386frame, /* frame finder */
- i386excep, /* print exception */
- 0, /* breakpoint fixup */
- leieeesftos, /* single precision float printer */
- leieeedftos, /* double precision float printer */
- i386foll, /* following addresses */
- i386inst, /* print instruction */
- i386das, /* dissembler */
- i386instlen, /* instruction size calculation */
- };
- static char*
- i386excep(Map *map, Rgetter rget)
- {
- uint32_t c;
- uint64_t pc;
- static char buf[16];
- c = (*rget)(map, "TRAP");
- if(c > 64 || excname[c] == 0) {
- if (c == 3) {
- pc = (*rget)(map, "PC");
- if (get1(map, pc, (uint8_t*)buf, machdata->bpsize) > 0)
- if (memcmp(buf, machdata->bpinst, machdata->bpsize) == 0)
- return "breakpoint";
- }
- snprint(buf, sizeof(buf), "exception %ld", c);
- return buf;
- } else
- return excname[c];
- }
- static int
- i386trace(Map *map, uint64_t pc, uint64_t sp, uint64_t link, Tracer trace)
- {
- int i;
- uint64_t osp;
- Symbol s, f;
- USED(link);
- i = 0;
- osp = 0;
- while(findsym(pc, CTEXT, &s)) {
- if (osp == sp)
- break;
- osp = sp;
- if(strcmp(STARTSYM, s.name) == 0 || strcmp(PROFSYM, s.name) == 0)
- break;
- if(pc != s.value) { /* not at first instruction */
- if(findlocal(&s, FRAMENAME, &f) == 0)
- break;
- sp += f.value-mach->szaddr;
- }
- if (geta(map, sp, &pc) < 0)
- break;
- if(pc == 0)
- break;
- (*trace)(map, pc, sp, &s);
- sp += mach->szaddr;
- if(++i > 1000)
- break;
- }
- return i;
- }
- static uint64_t
- i386frame(Map *map, uint64_t addr, uint64_t pc, uint64_t sp, uint64_t link)
- {
- Symbol s, f;
- USED(link);
- while (findsym(pc, CTEXT, &s)) {
- if(strcmp(STARTSYM, s.name) == 0 || strcmp(PROFSYM, s.name) == 0)
- break;
- if(pc != s.value) { /* not first instruction */
- if(findlocal(&s, FRAMENAME, &f) == 0)
- break;
- sp += f.value-mach->szaddr;
- }
- if (s.value == addr)
- return sp;
- if (geta(map, sp, &pc) < 0)
- break;
- sp += mach->szaddr;
- }
- return 0;
- }
- /* I386/486 - Disassembler and related functions */
- /*
- * an instruction
- */
- typedef struct Instr Instr;
- struct Instr
- {
- uint8_t mem[1+1+1+1+2+1+1+4+4]; /* raw instruction */
- uint64_t addr; /* address of start of instruction */
- int n; /* number of bytes in instruction */
- char *prefix; /* instr prefix */
- char *segment; /* segment override */
- uint8_t jumptype; /* set to the operand type for jump/ret/call */
- uint8_t amd64;
- uint8_t rex; /* REX prefix (or zero) */
- char osize; /* 'W' or 'L' (or 'Q' on amd64) */
- char asize; /* address size 'W' or 'L' (or 'Q' or amd64) */
- uint8_t mod; /* bits 6-7 of mod r/m field */
- uint8_t reg; /* bits 3-5 of mod r/m field */
- char ss; /* bits 6-7 of SIB */
- char index; /* bits 3-5 of SIB */
- char base; /* bits 0-2 of SIB */
- char rip; /* RIP-relative in amd64 mode */
- uint8_t opre; /* f2/f3 could introduce media */
- int16_t seg; /* segment of far address */
- uint32_t disp; /* displacement */
- uint32_t imm; /* immediate */
- uint32_t imm2; /* second immediate operand */
- uint64_t imm64; /* big immediate */
- char *curr; /* fill level in output buffer */
- char *end; /* end of output buffer */
- char *err; /* error message */
- };
- /* 386 register (ha!) set */
- enum{
- AX=0,
- CX,
- DX,
- BX,
- SP,
- BP,
- SI,
- DI,
- /* amd64 */
- R8,
- R9,
- R10,
- R11,
- R12,
- R13,
- R14,
- R15
- };
- /* amd64 rex extension byte */
- enum{
- REXW = 1<<3, /* =1, 64-bit operand size */
- REXR = 1<<2, /* extend modrm reg */
- REXX = 1<<1, /* extend sib index */
- REXB = 1<<0 /* extend modrm r/m, sib base, or opcode reg */
- };
-
- /* Operand Format codes */
- /*
- %A - address size register modifier (!asize -> 'E')
- %C - Control register CR0/CR1/CR2
- %D - Debug register DR0/DR1/DR2/DR3/DR6/DR7
- %I - second immediate operand
- %O - Operand size register modifier (!osize -> 'E')
- %T - Test register TR6/TR7
- %S - size code ('W' or 'L')
- %W - Weird opcode: OSIZE == 'W' => "CBW"; else => "CWDE"
- %d - displacement 16-32 bits
- %e - effective address - Mod R/M value
- %f - floating point register F0-F7 - from Mod R/M register
- %g - segment register
- %i - immediate operand 8-32 bits
- %p - PC-relative - signed displacement in immediate field
- %r - Reg from Mod R/M
- %w - Weird opcode: OSIZE == 'W' => "CWD"; else => "CDQ"
- */
- typedef struct Optable Optable;
- struct Optable
- {
- char operand[2];
- void *proto; /* actually either (char*) or (Optable*) */
- };
- /* Operand decoding codes */
- enum {
- Ib = 1, /* 8-bit immediate - (no sign extension)*/
- Ibs, /* 8-bit immediate (sign extended) */
- Jbs, /* 8-bit sign-extended immediate in jump or call */
- Iw, /* 16-bit immediate -> imm */
- Iw2, /* 16-bit immediate -> imm2 */
- Iwd, /* Operand-sized immediate (no sign extension)*/
- Iwdq, /* Operand-sized immediate, possibly 64 bits */
- Awd, /* Address offset */
- Iwds, /* Operand-sized immediate (sign extended) */
- RM, /* Word or long R/M field with register (/r) */
- RMB, /* Byte R/M field with register (/r) */
- RMOP, /* Word or long R/M field with op code (/digit) */
- RMOPB, /* Byte R/M field with op code (/digit) */
- RMR, /* R/M register only (mod = 11) */
- RMM, /* R/M memory only (mod = 0/1/2) */
- R0, /* Base reg of Mod R/M is literal 0x00 */
- R1, /* Base reg of Mod R/M is literal 0x01 */
- FRMOP, /* Floating point R/M field with opcode */
- FRMEX, /* Extended floating point R/M field with opcode */
- JUMP, /* Jump or Call flag - no operand */
- RET, /* Return flag - no operand */
- OA, /* literal 0x0a byte */
- PTR, /* Seg:Displacement addr (ptr16:16 or ptr16:32) */
- AUX, /* Multi-byte op code - Auxiliary table */
- AUXMM, /* multi-byte op code - auxiliary table chosen by prefix */
- PRE, /* Instr Prefix */
- OPRE, /* Instr Prefix or media op extension */
- SEG, /* Segment Prefix */
- OPOVER, /* Operand size override */
- ADDOVER, /* Address size override */
- };
-
- static Optable optab0F00[8]=
- {
- [0x00] = 0,0, "MOVW LDT,%e",
- [0x01] = 0,0, "MOVW TR,%e",
- [0x02] = 0,0, "MOVW %e,LDT",
- [0x03] = 0,0, "MOVW %e,TR",
- [0x04] = 0,0, "VERR %e",
- [0x05] = 0,0, "VERW %e",
- };
- static Optable optab0F01[8]=
- {
- [0x00] = 0,0, "MOVL GDTR,%e",
- [0x01] = 0,0, "MOVL IDTR,%e",
- [0x02] = 0,0, "MOVL %e,GDTR",
- [0x03] = 0,0, "MOVL %e,IDTR",
- [0x04] = 0,0, "MOVW MSW,%e", /* word */
- [0x06] = 0,0, "MOVW %e,MSW", /* word */
- [0x07] = 0,0, "INVLPG %e", /* or SWAPGS */
- };
- static Optable optab0F01F8[1]=
- {
- [0x00] = 0,0, "SWAPGS",
- };
- /* 0F71 */
- /* 0F72 */
- /* 0F73 */
- static Optable optab0FAE[8]=
- {
- [0x00] = 0,0, "FXSAVE %e",
- [0x01] = 0,0, "FXRSTOR %e",
- [0x02] = 0,0, "LDMXCSR %e",
- [0x03] = 0,0, "STMXCSR %e",
- [0x05] = 0,0, "LFENCE",
- [0x06] = 0,0, "MFENCE",
- [0x07] = 0,0, "SFENCE",
- };
- /* 0F18 */
- /* 0F0D */
- static Optable optab0FBA[8]=
- {
- [0x04] = Ib,0, "BT%S %i,%e",
- [0x05] = Ib,0, "BTS%S %i,%e",
- [0x06] = Ib,0, "BTR%S %i,%e",
- [0x07] = Ib,0, "BTC%S %i,%e",
- };
- static Optable optab0F0F[256]=
- {
- [0x0c] = 0,0, "PI2FW %m,%M",
- [0x0d] = 0,0, "PI2L %m,%M",
- [0x1c] = 0,0, "PF2IW %m,%M",
- [0x1d] = 0,0, "PF2IL %m,%M",
- [0x8a] = 0,0, "PFNACC %m,%M",
- [0x8e] = 0,0, "PFPNACC %m,%M",
- [0x90] = 0,0, "PFCMPGE %m,%M",
- [0x94] = 0,0, "PFMIN %m,%M",
- [0x96] = 0,0, "PFRCP %m,%M",
- [0x97] = 0,0, "PFRSQRT %m,%M",
- [0x9a] = 0,0, "PFSUB %m,%M",
- [0x9e] = 0,0, "PFADD %m,%M",
- [0xa0] = 0,0, "PFCMPGT %m,%M",
- [0xa4] = 0,0, "PFMAX %m,%M",
- [0xa6] = 0,0, "PFRCPIT1 %m,%M",
- [0xa7] = 0,0, "PFRSQIT1 %m,%M",
- [0xaa] = 0,0, "PFSUBR %m,%M",
- [0xae] = 0,0, "PFACC %m,%M",
- [0xb0] = 0,0, "PFCMPEQ %m,%M",
- [0xb4] = 0,0, "PFMUL %m,%M",
- [0xb6] = 0,0, "PFRCPI2T %m,%M",
- [0xb7] = 0,0, "PMULHRW %m,%M",
- [0xbb] = 0,0, "PSWAPL %m,%M",
- };
- static Optable optab0FC7[8]=
- {
- [0x01] = 0,0, "CMPXCHG8B %e",
- };
- static Optable optab660F71[8]=
- {
- [0x02] = Ib,0, "PSRLW %i,%X",
- [0x04] = Ib,0, "PSRAW %i,%X",
- [0x06] = Ib,0, "PSLLW %i,%X",
- };
- static Optable optab660F72[8]=
- {
- [0x02] = Ib,0, "PSRLL %i,%X",
- [0x04] = Ib,0, "PSRAL %i,%X",
- [0x06] = Ib,0, "PSLLL %i,%X",
- };
- static Optable optab660F73[8]=
- {
- [0x02] = Ib,0, "PSRLQ %i,%X",
- [0x03] = Ib,0, "PSRLO %i,%X",
- [0x06] = Ib,0, "PSLLQ %i,%X",
- [0x07] = Ib,0, "PSLLO %i,%X",
- };
- static Optable optab660F[256]=
- {
- [0x2B] = RM,0, "MOVNTPD %x,%e",
- [0x2E] = RM,0, "UCOMISD %x,%X",
- [0x2F] = RM,0, "COMISD %x,%X",
- [0x5A] = RM,0, "CVTPD2PS %x,%X",
- [0x5B] = RM,0, "CVTPS2PL %x,%X",
- [0x6A] = RM,0, "PUNPCKHLQ %x,%X",
- [0x6B] = RM,0, "PACKSSLW %x,%X",
- [0x6C] = RM,0, "PUNPCKLQDQ %x,%X",
- [0x6D] = RM,0, "PUNPCKHQDQ %x,%X",
- [0x6E] = RM,0, "MOV%S %e,%X",
- [0x6F] = RM,0, "MOVO %x,%X", /* MOVDQA */
- [0x70] = RM,Ib, "PSHUFL %i,%x,%X",
- [0x71] = RMOP,0, optab660F71,
- [0x72] = RMOP,0, optab660F72,
- [0x73] = RMOP,0, optab660F73,
- [0x7E] = RM,0, "MOV%S %X,%e",
- [0x7F] = RM,0, "MOVO %X,%x",
- [0xC4] = RM,Ib, "PINSRW %i,%e,%X",
- [0xC5] = RMR,Ib, "PEXTRW %i,%X,%e",
- [0xD4] = RM,0, "PADDQ %x,%X",
- [0xD5] = RM,0, "PMULLW %x,%X",
- [0xD6] = RM,0, "MOVQ %X,%x",
- [0xE6] = RM,0, "CVTTPD2PL %x,%X",
- [0xE7] = RM,0, "MOVNTO %X,%e",
- [0xF7] = RM,0, "MASKMOVOU %x,%X",
- };
- static Optable optabF20F[256]=
- {
- [0x10] = RM,0, "MOVSD %x,%X",
- [0x11] = RM,0, "MOVSD %X,%x",
- [0x2A] = RM,0, "CVTS%S2SD %e,%X",
- [0x2C] = RM,0, "CVTTSD2S%S %x,%r",
- [0x2D] = RM,0, "CVTSD2S%S %x,%r",
- [0x5A] = RM,0, "CVTSD2SS %x,%X",
- [0x6F] = RM,0, "MOVOU %x,%X",
- [0x70] = RM,Ib, "PSHUFLW %i,%x,%X",
- [0x7F] = RM,0, "MOVOU %X,%x",
- [0xD6] = RM,0, "MOVQOZX %M,%X",
- [0xE6] = RM,0, "CVTPD2PL %x,%X",
- };
- static Optable optabF30F[256]=
- {
- [0x10] = RM,0, "MOVSS %x,%X",
- [0x11] = RM,0, "MOVSS %X,%x",
- [0x2A] = RM,0, "CVTS%S2SS %e,%X",
- [0x2C] = RM,0, "CVTTSS2S%S %x,%r",
- [0x2D] = RM,0, "CVTSS2S%S %x,%r",
- [0x5A] = RM,0, "CVTSS2SD %x,%X",
- [0x5B] = RM,0, "CVTTPS2PL %x,%X",
- [0x6F] = RM,0, "MOVOU %x,%X",
- [0x70] = RM,Ib, "PSHUFHW %i,%x,%X",
- [0x7E] = RM,0, "MOVQOZX %x,%X",
- [0x7F] = RM,0, "MOVOU %X,%x",
- [0xD6] = RM,0, "MOVQOZX %m*,%X",
- [0xE6] = RM,0, "CVTPL2PD %x,%X",
- };
- static Optable optab0F[256]=
- {
- [0x00] = RMOP,0, optab0F00,
- [0x01] = RMOP,0, optab0F01,
- [0x02] = RM,0, "LAR %e,%r",
- [0x03] = RM,0, "LSL %e,%r",
- [0x05] = 0,0, "SYSCALL",
- [0x06] = 0,0, "CLTS",
- [0x07] = 0,0, "SYSRET",
- [0x08] = 0,0, "INVD",
- [0x09] = 0,0, "WBINVD",
- [0x0B] = 0,0, "UD2",
- [0x0F] = RM,AUX, optab0F0F, /* 3DNow! */
- [0x10] = RM,0, "MOVU%s %x,%X",
- [0x11] = RM,0, "MOVU%s %X,%x",
- [0x12] = RM,0, "MOV[H]L%s %x,%X", /* TO DO: H if source is XMM */
- [0x13] = RM,0, "MOVL%s %X,%e",
- [0x14] = RM,0, "UNPCKL%s %x,%X",
- [0x15] = RM,0, "UNPCKH%s %x,%X",
- [0x16] = RM,0, "MOV[L]H%s %x,%X", /* TO DO: L if source is XMM */
- [0x17] = RM,0, "MOVH%s %X,%x",
- [0x20] = RMR,0, "MOVL %C,%e",
- [0x21] = RMR,0, "MOVL %D,%e",
- [0x22] = RMR,0, "MOVL %e,%C",
- [0x23] = RMR,0, "MOVL %e,%D",
- [0x24] = RMR,0, "MOVL %T,%e",
- [0x26] = RMR,0, "MOVL %e,%T",
- [0x28] = RM,0, "MOVA%s %x,%X",
- [0x29] = RM,0, "MOVA%s %X,%x",
- [0x2A] = RM,0, "CVTPL2%s %m*,%X",
- [0x2B] = RM,0, "MOVNT%s %X,%e",
- [0x2C] = RM,0, "CVTT%s2PL %x,%M",
- [0x2D] = RM,0, "CVT%s2PL %x,%M",
- [0x2E] = RM,0, "UCOMISS %x,%X",
- [0x2F] = RM,0, "COMISS %x,%X",
- [0x30] = 0,0, "WRMSR",
- [0x31] = 0,0, "RDTSC",
- [0x32] = 0,0, "RDMSR",
- [0x33] = 0,0, "RDPMC",
- [0x42] = RM,0, "CMOVC %e,%r", /* CF */
- [0x43] = RM,0, "CMOVNC %e,%r", /* ¬ CF */
- [0x44] = RM,0, "CMOVZ %e,%r", /* ZF */
- [0x45] = RM,0, "CMOVNZ %e,%r", /* ¬ ZF */
- [0x46] = RM,0, "CMOVBE %e,%r", /* CF ∨ ZF */
- [0x47] = RM,0, "CMOVA %e,%r", /* ¬CF ∧ ¬ZF */
- [0x48] = RM,0, "CMOVS %e,%r", /* SF */
- [0x49] = RM,0, "CMOVNS %e,%r", /* ¬ SF */
- [0x4A] = RM,0, "CMOVP %e,%r", /* PF */
- [0x4B] = RM,0, "CMOVNP %e,%r", /* ¬ PF */
- [0x4C] = RM,0, "CMOVLT %e,%r", /* LT ≡ OF ≠ SF */
- [0x4D] = RM,0, "CMOVGE %e,%r", /* GE ≡ ZF ∨ SF */
- [0x4E] = RM,0, "CMOVLE %e,%r", /* LE ≡ ZF ∨ LT */
- [0x4F] = RM,0, "CMOVGT %e,%r", /* GT ≡ ¬ZF ∧ GE */
- [0x50] = RM,0, "MOVMSK%s %X,%r", /* TO DO: check */
- [0x51] = RM,0, "SQRT%s %x,%X",
- [0x52] = RM,0, "RSQRT%s %x,%X",
- [0x53] = RM,0, "RCP%s %x,%X",
- [0x54] = RM,0, "AND%s %x,%X",
- [0x55] = RM,0, "ANDN%s %x,%X",
- [0x56] = RM,0, "OR%s %x,%X", /* TO DO: S/D */
- [0x57] = RM,0, "XOR%s %x,%X", /* S/D */
- [0x58] = RM,0, "ADD%s %x,%X", /* S/P S/D */
- [0x59] = RM,0, "MUL%s %x,%X",
- [0x5A] = RM,0, "CVTPS2PD %x,%X",
- [0x5B] = RM,0, "CVTPL2PS %x,%X",
- [0x5C] = RM,0, "SUB%s %x,%X",
- [0x5D] = RM,0, "MIN%s %x,%X",
- [0x5E] = RM,0, "DIV%s %x,%X", /* TO DO: S/P S/D */
- [0x5F] = RM,0, "MAX%s %x,%X",
- [0x60] = RM,0, "PUNPCKLBW %m,%M",
- [0x61] = RM,0, "PUNPCKLWL %m,%M",
- [0x62] = RM,0, "PUNPCKLLQ %m,%M",
- [0x63] = RM,0, "PACKSSWB %m,%M",
- [0x64] = RM,0, "PCMPGTB %m,%M",
- [0x65] = RM,0, "PCMPGTW %m,%M",
- [0x66] = RM,0, "PCMPGTL %m,%M",
- [0x67] = RM,0, "PACKUSWB %m,%M",
- [0x68] = RM,0, "PUNPCKHBW %m,%M",
- [0x69] = RM,0, "PUNPCKHWL %m,%M",
- [0x6A] = RM,0, "PUNPCKHLQ %m,%M",
- [0x6B] = RM,0, "PACKSSLW %m,%M",
- [0x6E] = RM,0, "MOV%S %e,%M",
- [0x6F] = RM,0, "MOVQ %m,%M",
- [0x70] = RM,Ib, "PSHUFW %i,%m,%M",
- [0x74] = RM,0, "PCMPEQB %m,%M",
- [0x75] = RM,0, "PCMPEQW %m,%M",
- [0x76] = RM,0, "PCMPEQL %m,%M",
- [0x7E] = RM,0, "MOV%S %M,%e",
- [0x7F] = RM,0, "MOVQ %M,%m",
- [0xAE] = RMOP,0, optab0FAE,
- [0xAA] = 0,0, "RSM",
- [0xB0] = RM,0, "CMPXCHGB %r,%e",
- [0xB1] = RM,0, "CMPXCHG%S %r,%e",
- [0xC0] = RMB,0, "XADDB %r,%e",
- [0xC1] = RM,0, "XADD%S %r,%e",
- [0xC2] = RM,Ib, "CMP%s %i,%x,%X",
- [0xC3] = RM,0, "MOVNTI%S %r,%e",
- [0xC6] = RM,Ib, "SHUF%s %i,%x,%X",
- [0xC8] = 0,0, "BSWAP AX",
- [0xC9] = 0,0, "BSWAP CX",
- [0xCA] = 0,0, "BSWAP DX",
- [0xCB] = 0,0, "BSWAP BX",
- [0xCC] = 0,0, "BSWAP SP",
- [0xCD] = 0,0, "BSWAP BP",
- [0xCE] = 0,0, "BSWAP SI",
- [0xCF] = 0,0, "BSWAP DI",
- [0xD1] = RM,0, "PSRLW %m,%M",
- [0xD2] = RM,0, "PSRLL %m,%M",
- [0xD3] = RM,0, "PSRLQ %m,%M",
- [0xD5] = RM,0, "PMULLW %m,%M",
- [0xD6] = RM,0, "MOVQOZX %m*,%X",
- [0xD7] = RM,0, "PMOVMSKB %m,%r",
- [0xD8] = RM,0, "PSUBUSB %m,%M",
- [0xD9] = RM,0, "PSUBUSW %m,%M",
- [0xDA] = RM,0, "PMINUB %m,%M",
- [0xDB] = RM,0, "PAND %m,%M",
- [0xDC] = RM,0, "PADDUSB %m,%M",
- [0xDD] = RM,0, "PADDUSW %m,%M",
- [0xDE] = RM,0, "PMAXUB %m,%M",
- [0xDF] = RM,0, "PANDN %m,%M",
- [0xE0] = RM,0, "PAVGB %m,%M",
- [0xE1] = RM,0, "PSRAW %m,%M",
- [0xE2] = RM,0, "PSRAL %m,%M",
- [0xE3] = RM,0, "PAVGW %m,%M",
- [0xE4] = RM,0, "PMULHUW %m,%M",
- [0xE5] = RM,0, "PMULHW %m,%M",
- [0xE7] = RM,0, "MOVNTQ %M,%e",
- [0xE8] = RM,0, "PSUBSB %m,%M",
- [0xE9] = RM,0, "PSUBSW %m,%M",
- [0xEA] = RM,0, "PMINSW %m,%M",
- [0xEB] = RM,0, "POR %m,%M",
- [0xEC] = RM,0, "PADDSB %m,%M",
- [0xED] = RM,0, "PADDSW %m,%M",
- [0xEE] = RM,0, "PMAXSW %m,%M",
- [0xEF] = RM,0, "PXOR %m,%M",
- [0xF1] = RM,0, "PSLLW %m,%M",
- [0xF2] = RM,0, "PSLLL %m,%M",
- [0xF3] = RM,0, "PSLLQ %m,%M",
- [0xF4] = RM,0, "PMULULQ %m,%M",
- [0xF5] = RM,0, "PMADDWL %m,%M",
- [0xF6] = RM,0, "PSADBW %m,%M",
- [0xF7] = RMR,0, "MASKMOVQ %m,%M",
- [0xF8] = RM,0, "PSUBB %m,%M",
- [0xF9] = RM,0, "PSUBW %m,%M",
- [0xFA] = RM,0, "PSUBL %m,%M",
- [0xFC] = RM,0, "PADDB %m,%M",
- [0xFD] = RM,0, "PADDW %m,%M",
- [0xFE] = RM,0, "PADDL %m,%M",
- [0x80] = Iwds,0, "JOS %p",
- [0x81] = Iwds,0, "JOC %p",
- [0x82] = Iwds,0, "JCS %p",
- [0x83] = Iwds,0, "JCC %p",
- [0x84] = Iwds,0, "JEQ %p",
- [0x85] = Iwds,0, "JNE %p",
- [0x86] = Iwds,0, "JLS %p",
- [0x87] = Iwds,0, "JHI %p",
- [0x88] = Iwds,0, "JMI %p",
- [0x89] = Iwds,0, "JPL %p",
- [0x8a] = Iwds,0, "JPS %p",
- [0x8b] = Iwds,0, "JPC %p",
- [0x8c] = Iwds,0, "JLT %p",
- [0x8d] = Iwds,0, "JGE %p",
- [0x8e] = Iwds,0, "JLE %p",
- [0x8f] = Iwds,0, "JGT %p",
- [0x90] = RMB,0, "SETOS %e",
- [0x91] = RMB,0, "SETOC %e",
- [0x92] = RMB,0, "SETCS %e",
- [0x93] = RMB,0, "SETCC %e",
- [0x94] = RMB,0, "SETEQ %e",
- [0x95] = RMB,0, "SETNE %e",
- [0x96] = RMB,0, "SETLS %e",
- [0x97] = RMB,0, "SETHI %e",
- [0x98] = RMB,0, "SETMI %e",
- [0x99] = RMB,0, "SETPL %e",
- [0x9a] = RMB,0, "SETPS %e",
- [0x9b] = RMB,0, "SETPC %e",
- [0x9c] = RMB,0, "SETLT %e",
- [0x9d] = RMB,0, "SETGE %e",
- [0x9e] = RMB,0, "SETLE %e",
- [0x9f] = RMB,0, "SETGT %e",
- [0xa0] = 0,0, "PUSHL FS",
- [0xa1] = 0,0, "POPL FS",
- [0xa2] = 0,0, "CPUID",
- [0xa3] = RM,0, "BT%S %r,%e",
- [0xa4] = RM,Ib, "SHLD%S %r,%i,%e",
- [0xa5] = RM,0, "SHLD%S %r,CL,%e",
- [0xa8] = 0,0, "PUSHL GS",
- [0xa9] = 0,0, "POPL GS",
- [0xab] = RM,0, "BTS%S %r,%e",
- [0xac] = RM,Ib, "SHRD%S %r,%i,%e",
- [0xad] = RM,0, "SHRD%S %r,CL,%e",
- [0xaf] = RM,0, "IMUL%S %e,%r",
- [0xb2] = RMM,0, "LSS %e,%r",
- [0xb3] = RM,0, "BTR%S %r,%e",
- [0xb4] = RMM,0, "LFS %e,%r",
- [0xb5] = RMM,0, "LGS %e,%r",
- [0xb6] = RMB,0, "MOVBZX %e,%R",
- [0xb7] = RM,0, "MOVWZX %e,%R",
- [0xba] = RMOP,0, optab0FBA,
- [0xbb] = RM,0, "BTC%S %e,%r",
- [0xbc] = RM,0, "BSF%S %e,%r",
- [0xbd] = RM,0, "BSR%S %e,%r",
- [0xbe] = RMB,0, "MOVBSX %e,%R",
- [0xbf] = RM,0, "MOVWSX %e,%R",
- [0xc7] = RMOP,0, optab0FC7,
- };
- static Optable optab80[8]=
- {
- [0x00] = Ib,0, "ADDB %i,%e",
- [0x01] = Ib,0, "ORB %i,%e",
- [0x02] = Ib,0, "ADCB %i,%e",
- [0x03] = Ib,0, "SBBB %i,%e",
- [0x04] = Ib,0, "ANDB %i,%e",
- [0x05] = Ib,0, "SUBB %i,%e",
- [0x06] = Ib,0, "XORB %i,%e",
- [0x07] = Ib,0, "CMPB %e,%i",
- };
- static Optable optab81[8]=
- {
- [0x00] = Iwd,0, "ADD%S %i,%e",
- [0x01] = Iwd,0, "OR%S %i,%e",
- [0x02] = Iwd,0, "ADC%S %i,%e",
- [0x03] = Iwd,0, "SBB%S %i,%e",
- [0x04] = Iwd,0, "AND%S %i,%e",
- [0x05] = Iwd,0, "SUB%S %i,%e",
- [0x06] = Iwd,0, "XOR%S %i,%e",
- [0x07] = Iwd,0, "CMP%S %e,%i",
- };
- static Optable optab83[8]=
- {
- [0x00] = Ibs,0, "ADD%S %i,%e",
- [0x01] = Ibs,0, "OR%S %i,%e",
- [0x02] = Ibs,0, "ADC%S %i,%e",
- [0x03] = Ibs,0, "SBB%S %i,%e",
- [0x04] = Ibs,0, "AND%S %i,%e",
- [0x05] = Ibs,0, "SUB%S %i,%e",
- [0x06] = Ibs,0, "XOR%S %i,%e",
- [0x07] = Ibs,0, "CMP%S %e,%i",
- };
- static Optable optabC0[8] =
- {
- [0x00] = Ib,0, "ROLB %i,%e",
- [0x01] = Ib,0, "RORB %i,%e",
- [0x02] = Ib,0, "RCLB %i,%e",
- [0x03] = Ib,0, "RCRB %i,%e",
- [0x04] = Ib,0, "SHLB %i,%e",
- [0x05] = Ib,0, "SHRB %i,%e",
- [0x07] = Ib,0, "SARB %i,%e",
- };
- static Optable optabC1[8] =
- {
- [0x00] = Ib,0, "ROL%S %i,%e",
- [0x01] = Ib,0, "ROR%S %i,%e",
- [0x02] = Ib,0, "RCL%S %i,%e",
- [0x03] = Ib,0, "RCR%S %i,%e",
- [0x04] = Ib,0, "SHL%S %i,%e",
- [0x05] = Ib,0, "SHR%S %i,%e",
- [0x07] = Ib,0, "SAR%S %i,%e",
- };
- static Optable optabD0[8] =
- {
- [0x00] = 0,0, "ROLB %e",
- [0x01] = 0,0, "RORB %e",
- [0x02] = 0,0, "RCLB %e",
- [0x03] = 0,0, "RCRB %e",
- [0x04] = 0,0, "SHLB %e",
- [0x05] = 0,0, "SHRB %e",
- [0x07] = 0,0, "SARB %e",
- };
- static Optable optabD1[8] =
- {
- [0x00] = 0,0, "ROL%S %e",
- [0x01] = 0,0, "ROR%S %e",
- [0x02] = 0,0, "RCL%S %e",
- [0x03] = 0,0, "RCR%S %e",
- [0x04] = 0,0, "SHL%S %e",
- [0x05] = 0,0, "SHR%S %e",
- [0x07] = 0,0, "SAR%S %e",
- };
- static Optable optabD2[8] =
- {
- [0x00] = 0,0, "ROLB CL,%e",
- [0x01] = 0,0, "RORB CL,%e",
- [0x02] = 0,0, "RCLB CL,%e",
- [0x03] = 0,0, "RCRB CL,%e",
- [0x04] = 0,0, "SHLB CL,%e",
- [0x05] = 0,0, "SHRB CL,%e",
- [0x07] = 0,0, "SARB CL,%e",
- };
- static Optable optabD3[8] =
- {
- [0x00] = 0,0, "ROL%S CL,%e",
- [0x01] = 0,0, "ROR%S CL,%e",
- [0x02] = 0,0, "RCL%S CL,%e",
- [0x03] = 0,0, "RCR%S CL,%e",
- [0x04] = 0,0, "SHL%S CL,%e",
- [0x05] = 0,0, "SHR%S CL,%e",
- [0x07] = 0,0, "SAR%S CL,%e",
- };
- static Optable optabD8[8+8] =
- {
- [0x00] = 0,0, "FADDF %e,F0",
- [0x01] = 0,0, "FMULF %e,F0",
- [0x02] = 0,0, "FCOMF %e,F0",
- [0x03] = 0,0, "FCOMFP %e,F0",
- [0x04] = 0,0, "FSUBF %e,F0",
- [0x05] = 0,0, "FSUBRF %e,F0",
- [0x06] = 0,0, "FDIVF %e,F0",
- [0x07] = 0,0, "FDIVRF %e,F0",
- [0x08] = 0,0, "FADDD %f,F0",
- [0x09] = 0,0, "FMULD %f,F0",
- [0x0a] = 0,0, "FCOMD %f,F0",
- [0x0b] = 0,0, "FCOMPD %f,F0",
- [0x0c] = 0,0, "FSUBD %f,F0",
- [0x0d] = 0,0, "FSUBRD %f,F0",
- [0x0e] = 0,0, "FDIVD %f,F0",
- [0x0f] = 0,0, "FDIVRD %f,F0",
- };
- /*
- * optabD9 and optabDB use the following encoding:
- * if (0 <= modrm <= 2) instruction = optabDx[modrm&0x07];
- * else instruction = optabDx[(modrm&0x3f)+8];
- *
- * the instructions for MOD == 3, follow the 8 instructions
- * for the other MOD values stored at the front of the table.
- */
- static Optable optabD9[64+8] =
- {
- [0x00] = 0,0, "FMOVF %e,F0",
- [0x02] = 0,0, "FMOVF F0,%e",
- [0x03] = 0,0, "FMOVFP F0,%e",
- [0x04] = 0,0, "FLDENV%S %e",
- [0x05] = 0,0, "FLDCW %e",
- [0x06] = 0,0, "FSTENV%S %e",
- [0x07] = 0,0, "FSTCW %e",
- [0x08] = 0,0, "FMOVD F0,F0", /* Mod R/M = 11xx xxxx*/
- [0x09] = 0,0, "FMOVD F1,F0",
- [0x0a] = 0,0, "FMOVD F2,F0",
- [0x0b] = 0,0, "FMOVD F3,F0",
- [0x0c] = 0,0, "FMOVD F4,F0",
- [0x0d] = 0,0, "FMOVD F5,F0",
- [0x0e] = 0,0, "FMOVD F6,F0",
- [0x0f] = 0,0, "FMOVD F7,F0",
- [0x10] = 0,0, "FXCHD F0,F0",
- [0x11] = 0,0, "FXCHD F1,F0",
- [0x12] = 0,0, "FXCHD F2,F0",
- [0x13] = 0,0, "FXCHD F3,F0",
- [0x14] = 0,0, "FXCHD F4,F0",
- [0x15] = 0,0, "FXCHD F5,F0",
- [0x16] = 0,0, "FXCHD F6,F0",
- [0x17] = 0,0, "FXCHD F7,F0",
- [0x18] = 0,0, "FNOP",
- [0x28] = 0,0, "FCHS",
- [0x29] = 0,0, "FABS",
- [0x2c] = 0,0, "FTST",
- [0x2d] = 0,0, "FXAM",
- [0x30] = 0,0, "FLD1",
- [0x31] = 0,0, "FLDL2T",
- [0x32] = 0,0, "FLDL2E",
- [0x33] = 0,0, "FLDPI",
- [0x34] = 0,0, "FLDLG2",
- [0x35] = 0,0, "FLDLN2",
- [0x36] = 0,0, "FLDZ",
- [0x38] = 0,0, "F2XM1",
- [0x39] = 0,0, "FYL2X",
- [0x3a] = 0,0, "FPTAN",
- [0x3b] = 0,0, "FPATAN",
- [0x3c] = 0,0, "FXTRACT",
- [0x3d] = 0,0, "FPREM1",
- [0x3e] = 0,0, "FDECSTP",
- [0x3f] = 0,0, "FNCSTP",
- [0x40] = 0,0, "FPREM",
- [0x41] = 0,0, "FYL2XP1",
- [0x42] = 0,0, "FSQRT",
- [0x43] = 0,0, "FSINCOS",
- [0x44] = 0,0, "FRNDINT",
- [0x45] = 0,0, "FSCALE",
- [0x46] = 0,0, "FSIN",
- [0x47] = 0,0, "FCOS",
- };
- static Optable optabDA[8+8] =
- {
- [0x00] = 0,0, "FADDL %e,F0",
- [0x01] = 0,0, "FMULL %e,F0",
- [0x02] = 0,0, "FCOML %e,F0",
- [0x03] = 0,0, "FCOMLP %e,F0",
- [0x04] = 0,0, "FSUBL %e,F0",
- [0x05] = 0,0, "FSUBRL %e,F0",
- [0x06] = 0,0, "FDIVL %e,F0",
- [0x07] = 0,0, "FDIVRL %e,F0",
- [0x0d] = R1,0, "FUCOMPP",
- };
- static Optable optabDB[8+64] =
- {
- [0x00] = 0,0, "FMOVL %e,F0",
- [0x02] = 0,0, "FMOVL F0,%e",
- [0x03] = 0,0, "FMOVLP F0,%e",
- [0x05] = 0,0, "FMOVX %e,F0",
- [0x07] = 0,0, "FMOVXP F0,%e",
- [0x2a] = 0,0, "FCLEX",
- [0x2b] = 0,0, "FINIT",
- };
- static Optable optabDC[8+8] =
- {
- [0x00] = 0,0, "FADDD %e,F0",
- [0x01] = 0,0, "FMULD %e,F0",
- [0x02] = 0,0, "FCOMD %e,F0",
- [0x03] = 0,0, "FCOMDP %e,F0",
- [0x04] = 0,0, "FSUBD %e,F0",
- [0x05] = 0,0, "FSUBRD %e,F0",
- [0x06] = 0,0, "FDIVD %e,F0",
- [0x07] = 0,0, "FDIVRD %e,F0",
- [0x08] = 0,0, "FADDD F0,%f",
- [0x09] = 0,0, "FMULD F0,%f",
- [0x0c] = 0,0, "FSUBRD F0,%f",
- [0x0d] = 0,0, "FSUBD F0,%f",
- [0x0e] = 0,0, "FDIVRD F0,%f",
- [0x0f] = 0,0, "FDIVD F0,%f",
- };
- static Optable optabDD[8+8] =
- {
- [0x00] = 0,0, "FMOVD %e,F0",
- [0x02] = 0,0, "FMOVD F0,%e",
- [0x03] = 0,0, "FMOVDP F0,%e",
- [0x04] = 0,0, "FRSTOR%S %e",
- [0x06] = 0,0, "FSAVE%S %e",
- [0x07] = 0,0, "FSTSW %e",
- [0x08] = 0,0, "FFREED %f",
- [0x0a] = 0,0, "FMOVD %f,F0",
- [0x0b] = 0,0, "FMOVDP %f,F0",
- [0x0c] = 0,0, "FUCOMD %f,F0",
- [0x0d] = 0,0, "FUCOMDP %f,F0",
- };
- static Optable optabDE[8+8] =
- {
- [0x00] = 0,0, "FADDW %e,F0",
- [0x01] = 0,0, "FMULW %e,F0",
- [0x02] = 0,0, "FCOMW %e,F0",
- [0x03] = 0,0, "FCOMWP %e,F0",
- [0x04] = 0,0, "FSUBW %e,F0",
- [0x05] = 0,0, "FSUBRW %e,F0",
- [0x06] = 0,0, "FDIVW %e,F0",
- [0x07] = 0,0, "FDIVRW %e,F0",
- [0x08] = 0,0, "FADDDP F0,%f",
- [0x09] = 0,0, "FMULDP F0,%f",
- [0x0b] = R1,0, "FCOMPDP",
- [0x0c] = 0,0, "FSUBRDP F0,%f",
- [0x0d] = 0,0, "FSUBDP F0,%f",
- [0x0e] = 0,0, "FDIVRDP F0,%f",
- [0x0f] = 0,0, "FDIVDP F0,%f",
- };
- static Optable optabDF[8+8] =
- {
- [0x00] = 0,0, "FMOVW %e,F0",
- [0x02] = 0,0, "FMOVW F0,%e",
- [0x03] = 0,0, "FMOVWP F0,%e",
- [0x04] = 0,0, "FBLD %e",
- [0x05] = 0,0, "FMOVL %e,F0",
- [0x06] = 0,0, "FBSTP %e",
- [0x07] = 0,0, "FMOVLP F0,%e",
- [0x0c] = R0,0, "FSTSW %OAX",
- };
- static Optable optabF6[8] =
- {
- [0x00] = Ib,0, "TESTB %i,%e",
- [0x02] = 0,0, "NOTB %e",
- [0x03] = 0,0, "NEGB %e",
- [0x04] = 0,0, "MULB AL,%e",
- [0x05] = 0,0, "IMULB AL,%e",
- [0x06] = 0,0, "DIVB AL,%e",
- [0x07] = 0,0, "IDIVB AL,%e",
- };
- static Optable optabF7[8] =
- {
- [0x00] = Iwd,0, "TEST%S %i,%e",
- [0x02] = 0,0, "NOT%S %e",
- [0x03] = 0,0, "NEG%S %e",
- [0x04] = 0,0, "MUL%S %OAX,%e",
- [0x05] = 0,0, "IMUL%S %OAX,%e",
- [0x06] = 0,0, "DIV%S %OAX,%e",
- [0x07] = 0,0, "IDIV%S %OAX,%e",
- };
- static Optable optabFE[8] =
- {
- [0x00] = 0,0, "INCB %e",
- [0x01] = 0,0, "DECB %e",
- };
- static Optable optabFF[8] =
- {
- [0x00] = 0,0, "INC%S %e",
- [0x01] = 0,0, "DEC%S %e",
- [0x02] = JUMP,0, "CALL* %e",
- [0x03] = JUMP,0, "CALLF* %e",
- [0x04] = JUMP,0, "JMP* %e",
- [0x05] = JUMP,0, "JMPF* %e",
- [0x06] = 0,0, "PUSHL %e",
- };
- static Optable optable[256+1] =
- {
- [0x00] = RMB,0, "ADDB %r,%e",
- [0x01] = RM,0, "ADD%S %r,%e",
- [0x02] = RMB,0, "ADDB %e,%r",
- [0x03] = RM,0, "ADD%S %e,%r",
- [0x04] = Ib,0, "ADDB %i,AL",
- [0x05] = Iwd,0, "ADD%S %i,%OAX",
- [0x06] = 0,0, "PUSHL ES",
- [0x07] = 0,0, "POPL ES",
- [0x08] = RMB,0, "ORB %r,%e",
- [0x09] = RM,0, "OR%S %r,%e",
- [0x0a] = RMB,0, "ORB %e,%r",
- [0x0b] = RM,0, "OR%S %e,%r",
- [0x0c] = Ib,0, "ORB %i,AL",
- [0x0d] = Iwd,0, "OR%S %i,%OAX",
- [0x0e] = 0,0, "PUSHL CS",
- [0x0f] = AUXMM,0, optab0F,
- [0x10] = RMB,0, "ADCB %r,%e",
- [0x11] = RM,0, "ADC%S %r,%e",
- [0x12] = RMB,0, "ADCB %e,%r",
- [0x13] = RM,0, "ADC%S %e,%r",
- [0x14] = Ib,0, "ADCB %i,AL",
- [0x15] = Iwd,0, "ADC%S %i,%OAX",
- [0x16] = 0,0, "PUSHL SS",
- [0x17] = 0,0, "POPL SS",
- [0x18] = RMB,0, "SBBB %r,%e",
- [0x19] = RM,0, "SBB%S %r,%e",
- [0x1a] = RMB,0, "SBBB %e,%r",
- [0x1b] = RM,0, "SBB%S %e,%r",
- [0x1c] = Ib,0, "SBBB %i,AL",
- [0x1d] = Iwd,0, "SBB%S %i,%OAX",
- [0x1e] = 0,0, "PUSHL DS",
- [0x1f] = 0,0, "POPL DS",
- [0x20] = RMB,0, "ANDB %r,%e",
- [0x21] = RM,0, "AND%S %r,%e",
- [0x22] = RMB,0, "ANDB %e,%r",
- [0x23] = RM,0, "AND%S %e,%r",
- [0x24] = Ib,0, "ANDB %i,AL",
- [0x25] = Iwd,0, "AND%S %i,%OAX",
- [0x26] = SEG,0, "ES:",
- [0x27] = 0,0, "DAA",
- [0x28] = RMB,0, "SUBB %r,%e",
- [0x29] = RM,0, "SUB%S %r,%e",
- [0x2a] = RMB,0, "SUBB %e,%r",
- [0x2b] = RM,0, "SUB%S %e,%r",
- [0x2c] = Ib,0, "SUBB %i,AL",
- [0x2d] = Iwd,0, "SUB%S %i,%OAX",
- [0x2e] = SEG,0, "CS:",
- [0x2f] = 0,0, "DAS",
- [0x30] = RMB,0, "XORB %r,%e",
- [0x31] = RM,0, "XOR%S %r,%e",
- [0x32] = RMB,0, "XORB %e,%r",
- [0x33] = RM,0, "XOR%S %e,%r",
- [0x34] = Ib,0, "XORB %i,AL",
- [0x35] = Iwd,0, "XOR%S %i,%OAX",
- [0x36] = SEG,0, "SS:",
- [0x37] = 0,0, "AAA",
- [0x38] = RMB,0, "CMPB %r,%e",
- [0x39] = RM,0, "CMP%S %r,%e",
- [0x3a] = RMB,0, "CMPB %e,%r",
- [0x3b] = RM,0, "CMP%S %e,%r",
- [0x3c] = Ib,0, "CMPB %i,AL",
- [0x3d] = Iwd,0, "CMP%S %i,%OAX",
- [0x3e] = SEG,0, "DS:",
- [0x3f] = 0,0, "AAS",
- [0x40] = 0,0, "INC%S %OAX",
- [0x41] = 0,0, "INC%S %OCX",
- [0x42] = 0,0, "INC%S %ODX",
- [0x43] = 0,0, "INC%S %OBX",
- [0x44] = 0,0, "INC%S %OSP",
- [0x45] = 0,0, "INC%S %OBP",
- [0x46] = 0,0, "INC%S %OSI",
- [0x47] = 0,0, "INC%S %ODI",
- [0x48] = 0,0, "DEC%S %OAX",
- [0x49] = 0,0, "DEC%S %OCX",
- [0x4a] = 0,0, "DEC%S %ODX",
- [0x4b] = 0,0, "DEC%S %OBX",
- [0x4c] = 0,0, "DEC%S %OSP",
- [0x4d] = 0,0, "DEC%S %OBP",
- [0x4e] = 0,0, "DEC%S %OSI",
- [0x4f] = 0,0, "DEC%S %ODI",
- [0x50] = 0,0, "PUSH%S %OAX",
- [0x51] = 0,0, "PUSH%S %OCX",
- [0x52] = 0,0, "PUSH%S %ODX",
- [0x53] = 0,0, "PUSH%S %OBX",
- [0x54] = 0,0, "PUSH%S %OSP",
- [0x55] = 0,0, "PUSH%S %OBP",
- [0x56] = 0,0, "PUSH%S %OSI",
- [0x57] = 0,0, "PUSH%S %ODI",
- [0x58] = 0,0, "POP%S %OAX",
- [0x59] = 0,0, "POP%S %OCX",
- [0x5a] = 0,0, "POP%S %ODX",
- [0x5b] = 0,0, "POP%S %OBX",
- [0x5c] = 0,0, "POP%S %OSP",
- [0x5d] = 0,0, "POP%S %OBP",
- [0x5e] = 0,0, "POP%S %OSI",
- [0x5f] = 0,0, "POP%S %ODI",
- [0x60] = 0,0, "PUSHA%S",
- [0x61] = 0,0, "POPA%S",
- [0x62] = RMM,0, "BOUND %e,%r",
- [0x63] = RM,0, "ARPL %r,%e",
- [0x64] = SEG,0, "FS:",
- [0x65] = SEG,0, "GS:",
- [0x66] = OPOVER,0, "",
- [0x67] = ADDOVER,0, "",
- [0x68] = Iwd,0, "PUSH%S %i",
- [0x69] = RM,Iwd, "IMUL%S %e,%i,%r",
- [0x6a] = Ib,0, "PUSH%S %i",
- [0x6b] = RM,Ibs, "IMUL%S %e,%i,%r",
- [0x6c] = 0,0, "INSB DX,(%ODI)",
- [0x6d] = 0,0, "INS%S DX,(%ODI)",
- [0x6e] = 0,0, "OUTSB (%ASI),DX",
- [0x6f] = 0,0, "OUTS%S (%ASI),DX",
- [0x70] = Jbs,0, "JOS %p",
- [0x71] = Jbs,0, "JOC %p",
- [0x72] = Jbs,0, "JCS %p",
- [0x73] = Jbs,0, "JCC %p",
- [0x74] = Jbs,0, "JEQ %p",
- [0x75] = Jbs,0, "JNE %p",
- [0x76] = Jbs,0, "JLS %p",
- [0x77] = Jbs,0, "JHI %p",
- [0x78] = Jbs,0, "JMI %p",
- [0x79] = Jbs,0, "JPL %p",
- [0x7a] = Jbs,0, "JPS %p",
- [0x7b] = Jbs,0, "JPC %p",
- [0x7c] = Jbs,0, "JLT %p",
- [0x7d] = Jbs,0, "JGE %p",
- [0x7e] = Jbs,0, "JLE %p",
- [0x7f] = Jbs,0, "JGT %p",
- [0x80] = RMOPB,0, optab80,
- [0x81] = RMOP,0, optab81,
- [0x83] = RMOP,0, optab83,
- [0x84] = RMB,0, "TESTB %r,%e",
- [0x85] = RM,0, "TEST%S %r,%e",
- [0x86] = RMB,0, "XCHGB %r,%e",
- [0x87] = RM,0, "XCHG%S %r,%e",
- [0x88] = RMB,0, "MOVB %r,%e",
- [0x89] = RM,0, "MOV%S %r,%e",
- [0x8a] = RMB,0, "MOVB %e,%r",
- [0x8b] = RM,0, "MOV%S %e,%r",
- [0x8c] = RM,0, "MOVW %g,%e",
- [0x8d] = RM,0, "LEA%S %e,%r",
- [0x8e] = RM,0, "MOVW %e,%g",
- [0x8f] = RM,0, "POP%S %e",
- [0x90] = 0,0, "NOP",
- [0x91] = 0,0, "XCHG %OCX,%OAX",
- [0x92] = 0,0, "XCHG %ODX,%OAX",
- [0x93] = 0,0, "XCHG %OBX,%OAX",
- [0x94] = 0,0, "XCHG %OSP,%OAX",
- [0x95] = 0,0, "XCHG %OBP,%OAX",
- [0x96] = 0,0, "XCHG %OSI,%OAX",
- [0x97] = 0,0, "XCHG %ODI,%OAX",
- [0x98] = 0,0, "%W", /* miserable CBW or CWDE */
- [0x99] = 0,0, "%w", /* idiotic CWD or CDQ */
- [0x9a] = PTR,0, "CALL%S %d",
- [0x9b] = 0,0, "WAIT",
- [0x9c] = 0,0, "PUSHF",
- [0x9d] = 0,0, "POPF",
- [0x9e] = 0,0, "SAHF",
- [0x9f] = 0,0, "LAHF",
- [0xa0] = Awd,0, "MOVB %i,AL",
- [0xa1] = Awd,0, "MOV%S %i,%OAX",
- [0xa2] = Awd,0, "MOVB AL,%i",
- [0xa3] = Awd,0, "MOV%S %OAX,%i",
- [0xa4] = 0,0, "MOVSB (%ASI),(%ADI)",
- [0xa5] = 0,0, "MOVS%S (%ASI),(%ADI)",
- [0xa6] = 0,0, "CMPSB (%ASI),(%ADI)",
- [0xa7] = 0,0, "CMPS%S (%ASI),(%ADI)",
- [0xa8] = Ib,0, "TESTB %i,AL",
- [0xa9] = Iwd,0, "TEST%S %i,%OAX",
- [0xaa] = 0,0, "STOSB AL,(%ADI)",
- [0xab] = 0,0, "STOS%S %OAX,(%ADI)",
- [0xac] = 0,0, "LODSB (%ASI),AL",
- [0xad] = 0,0, "LODS%S (%ASI),%OAX",
- [0xae] = 0,0, "SCASB (%ADI),AL",
- [0xaf] = 0,0, "SCAS%S (%ADI),%OAX",
- [0xb0] = Ib,0, "MOVB %i,AL",
- [0xb1] = Ib,0, "MOVB %i,CL",
- [0xb2] = Ib,0, "MOVB %i,DL",
- [0xb3] = Ib,0, "MOVB %i,BL",
- [0xb4] = Ib,0, "MOVB %i,AH",
- [0xb5] = Ib,0, "MOVB %i,CH",
- [0xb6] = Ib,0, "MOVB %i,DH",
- [0xb7] = Ib,0, "MOVB %i,BH",
- [0xb8] = Iwdq,0, "MOV%S %i,%OAX",
- [0xb9] = Iwdq,0, "MOV%S %i,%OCX",
- [0xba] = Iwdq,0, "MOV%S %i,%ODX",
- [0xbb] = Iwdq,0, "MOV%S %i,%OBX",
- [0xbc] = Iwdq,0, "MOV%S %i,%OSP",
- [0xbd] = Iwdq,0, "MOV%S %i,%OBP",
- [0xbe] = Iwdq,0, "MOV%S %i,%OSI",
- [0xbf] = Iwdq,0, "MOV%S %i,%ODI",
- [0xc0] = RMOPB,0, optabC0,
- [0xc1] = RMOP,0, optabC1,
- [0xc2] = Iw,0, "RET %i",
- [0xc3] = RET,0, "RET",
- [0xc4] = RM,0, "LES %e,%r",
- [0xc5] = RM,0, "LDS %e,%r",
- [0xc6] = RMB,Ib, "MOVB %i,%e",
- [0xc7] = RM,Iwd, "MOV%S %i,%e",
- [0xc8] = Iw2,Ib, "ENTER %i,%I", /* loony ENTER */
- [0xc9] = RET,0, "LEAVE", /* bizarre LEAVE */
- [0xca] = Iw,0, "RETF %i",
- [0xcb] = RET,0, "RETF",
- [0xcc] = 0,0, "INT 3",
- [0xcd] = Ib,0, "INTB %i",
- [0xce] = 0,0, "INTO",
- [0xcf] = 0,0, "IRET",
- [0xd0] = RMOPB,0, optabD0,
- [0xd1] = RMOP,0, optabD1,
- [0xd2] = RMOPB,0, optabD2,
- [0xd3] = RMOP,0, optabD3,
- [0xd4] = OA,0, "AAM",
- [0xd5] = OA,0, "AAD",
- [0xd7] = 0,0, "XLAT",
- [0xd8] = FRMOP,0, optabD8,
- [0xd9] = FRMEX,0, optabD9,
- [0xda] = FRMOP,0, optabDA,
- [0xdb] = FRMEX,0, optabDB,
- [0xdc] = FRMOP,0, optabDC,
- [0xdd] = FRMOP,0, optabDD,
- [0xde] = FRMOP,0, optabDE,
- [0xdf] = FRMOP,0, optabDF,
- [0xe0] = Jbs,0, "LOOPNE %p",
- [0xe1] = Jbs,0, "LOOPE %p",
- [0xe2] = Jbs,0, "LOOP %p",
- [0xe3] = Jbs,0, "JCXZ %p",
- [0xe4] = Ib,0, "INB %i,AL",
- [0xe5] = Ib,0, "IN%S %i,%OAX",
- [0xe6] = Ib,0, "OUTB AL,%i",
- [0xe7] = Ib,0, "OUT%S %OAX,%i",
- [0xe8] = Iwds,0, "CALL %p",
- [0xe9] = Iwds,0, "JMP %p",
- [0xea] = PTR,0, "JMP %d",
- [0xeb] = Jbs,0, "JMP %p",
- [0xec] = 0,0, "INB DX,AL",
- [0xed] = 0,0, "IN%S DX,%OAX",
- [0xee] = 0,0, "OUTB AL,DX",
- [0xef] = 0,0, "OUT%S %OAX,DX",
- [0xf0] = PRE,0, "LOCK",
- [0xf2] = OPRE,0, "REPNE",
- [0xf3] = OPRE,0, "REP",
- [0xf4] = 0,0, "HLT",
- [0xf5] = 0,0, "CMC",
- [0xf6] = RMOPB,0, optabF6,
- [0xf7] = RMOP,0, optabF7,
- [0xf8] = 0,0, "CLC",
- [0xf9] = 0,0, "STC",
- [0xfa] = 0,0, "CLI",
- [0xfb] = 0,0, "STI",
- [0xfc] = 0,0, "CLD",
- [0xfd] = 0,0, "STD",
- [0xfe] = RMOPB,0, optabFE,
- [0xff] = RMOP,0, optabFF,
- [0x100] = RM,0, "MOVLQSX %r,%e",
- };
- /*
- * get a byte of the instruction
- */
- static int
- igetc(Map *map, Instr *ip, uint8_t *c)
- {
- if(ip->n+1 > sizeof(ip->mem)){
- werrstr("instruction too long");
- return -1;
- }
- if (get1(map, ip->addr+ip->n, c, 1) < 0) {
- werrstr("can't read instruction: %r");
- return -1;
- }
- ip->mem[ip->n++] = *c;
- return 1;
- }
- /*
- * get two bytes of the instruction
- */
- static int
- igets(Map *map, Instr *ip, uint16_t *sp)
- {
- uint8_t c;
- uint16_t s;
- if (igetc(map, ip, &c) < 0)
- return -1;
- s = c;
- if (igetc(map, ip, &c) < 0)
- return -1;
- s |= (c<<8);
- *sp = s;
- return 1;
- }
- /*
- * get 4 bytes of the instruction
- */
- static int
- igetl(Map *map, Instr *ip, uint32_t *lp)
- {
- uint16_t s;
- int32_t l;
- if (igets(map, ip, &s) < 0)
- return -1;
- l = s;
- if (igets(map, ip, &s) < 0)
- return -1;
- l |= (s<<16);
- *lp = l;
- return 1;
- }
- /*
- * get 8 bytes of the instruction
- */
- static int
- igetq(Map *map, Instr *ip, int64_t *qp)
- {
- uint32_t l;
- uint64_t q;
- if (igetl(map, ip, &l) < 0)
- return -1;
- q = l;
- if (igetl(map, ip, &l) < 0)
- return -1;
- q |= ((uint64_t)l<<32);
- *qp = q;
- return 1;
- }
- static int
- getdisp(Map *map, Instr *ip, int mod, int rm, int code, int pcrel)
- {
- uint8_t c;
- uint16_t s;
- if (mod > 2)
- return 1;
- if (mod == 1) {
- if (igetc(map, ip, &c) < 0)
- return -1;
- if (c&0x80)
- ip->disp = c|0xffffff00;
- else
- ip->disp = c&0xff;
- } else if (mod == 2 || rm == code) {
- if (ip->asize == 'E') {
- if (igetl(map, ip, &ip->disp) < 0)
- return -1;
- if (mod == 0)
- ip->rip = pcrel;
- } else {
- if (igets(map, ip, &s) < 0)
- return -1;
- if (s&0x8000)
- ip->disp = s|0xffff0000;
- else
- ip->disp = s;
- }
- if (mod == 0)
- ip->base = -1;
- }
- return 1;
- }
- static int
- modrm(Map *map, Instr *ip, uint8_t c)
- {
- uint8_t rm, mod;
- mod = (c>>6)&3;
- rm = c&7;
- ip->mod = mod;
- ip->base = rm;
- ip->reg = (c>>3)&7;
- ip->rip = 0;
- if (mod == 3) /* register */
- return 1;
- if (ip->asize == 0) { /* 16-bit mode */
- switch(rm) {
- case 0:
- ip->base = BX; ip->index = SI;
- break;
- case 1:
- ip->base = BX; ip->index = DI;
- break;
- case 2:
- ip->base = BP; ip->index = SI;
- break;
- case 3:
- ip->base = BP; ip->index = DI;
- break;
- case 4:
- ip->base = SI;
- break;
- case 5:
- ip->base = DI;
- break;
- case 6:
- ip->base = BP;
- break;
- case 7:
- ip->base = BX;
- break;
- default:
- break;
- }
- return getdisp(map, ip, mod, rm, 6, 0);
- }
- if (rm == 4) { /* scummy sib byte */
- if (igetc(map, ip, &c) < 0)
- return -1;
- ip->ss = (c>>6)&0x03;
- ip->index = (c>>3)&0x07;
- if (ip->index == 4)
- ip->index = -1;
- ip->base = c&0x07;
- return getdisp(map, ip, mod, ip->base, 5, 0);
- }
- return getdisp(map, ip, mod, rm, 5, ip->amd64);
- }
- static Optable *
- mkinstr(Map *map, Instr *ip, uint64_t pc)
- {
- int i, n, norex;
- uint8_t c;
- uint16_t s;
- Optable *op, *obase;
- char buf[128];
- memset(ip, 0, sizeof(*ip));
- norex = 1;
- ip->base = -1;
- ip->index = -1;
- if(asstype == AI8086)
- ip->osize = 'W';
- else {
- ip->osize = 'L';
- ip->asize = 'E';
- ip->amd64 = asstype != AI386;
- norex = 0;
- }
- ip->addr = pc;
- if (igetc(map, ip, &c) < 0)
- return 0;
- obase = optable;
- newop:
- if(ip->amd64 && !norex){
- if(c >= 0x40 && c <= 0x4f) {
- ip->rex = c;
- if(igetc(map, ip, &c) < 0)
- return 0;
- }
- if(c == 0x63){
- op = &obase[0x100]; /* MOVLQSX */
- goto hack;
- }
- }
- op = &obase[c];
- hack:
- if (op->proto == 0) {
- badop:
- n = snprint(buf, sizeof(buf), "opcode: ??");
- for (i = 0; i < ip->n && n < sizeof(buf)-3; i++, n+=2)
- _hexify(buf+n, ip->mem[i], 1);
- strcpy(buf+n, "??");
- werrstr(buf);
- return 0;
- }
- for(i = 0; i < 2 && op->operand[i]; i++) {
- switch(op->operand[i]) {
- case Ib: /* 8-bit immediate - (no sign extension)*/
- if (igetc(map, ip, &c) < 0)
- return 0;
- ip->imm = c&0xff;
- ip->imm64 = ip->imm;
- break;
- case Jbs: /* 8-bit jump immediate (sign extended) */
- if (igetc(map, ip, &c) < 0)
- return 0;
- if (c&0x80)
- ip->imm = c|0xffffff00;
- else
- ip->imm = c&0xff;
- ip->imm64 = (int32_t)ip->imm;
- ip->jumptype = Jbs;
- break;
- case Ibs: /* 8-bit immediate (sign extended) */
- if (igetc(map, ip, &c) < 0)
- return 0;
- if (c&0x80)
- if (ip->osize == 'L')
- ip->imm = c|0xffffff00;
- else
- ip->imm = c|0xff00;
- else
- ip->imm = c&0xff;
- ip->imm64 = (int32_t)ip->imm;
- break;
- case Iw: /* 16-bit immediate -> imm */
- if (igets(map, ip, &s) < 0)
- return 0;
- ip->imm = s&0xffff;
- ip->imm64 = ip->imm;
- ip->jumptype = Iw;
- break;
- case Iw2: /* 16-bit immediate -> in imm2*/
- if (igets(map, ip, &s) < 0)
- return 0;
- ip->imm2 = s&0xffff;
- break;
- case Iwd: /* Operand-sized immediate (no sign extension unless 64 bits)*/
- if (ip->osize == 'L') {
- if (igetl(map, ip, &ip->imm) < 0)
- return 0;
- ip->imm64 = ip->imm;
- if(ip->rex&REXW && (ip->imm & (1<<31)) != 0)
- ip->imm64 |= (uint64_t)~0 << 32;
- } else {
- if (igets(map, ip, &s)< 0)
- return 0;
- ip->imm = s&0xffff;
- ip->imm64 = ip->imm;
- }
- break;
- case Iwdq: /* Operand-sized immediate, possibly big */
- if (ip->osize == 'L') {
- if (igetl(map, ip, &ip->imm) < 0)
- return 0;
- ip->imm64 = ip->imm;
- if (ip->rex & REXW) {
- uint32_t l;
- if (igetl(map, ip, &l) < 0)
- return 0;
- ip->imm64 |= (uint64_t)l << 32;
- }
- } else {
- if (igets(map, ip, &s)< 0)
- return 0;
- ip->imm = s&0xffff;
- }
- break;
- case Awd: /* Address-sized immediate (no sign extension)*/
- if (ip->asize == 'E') {
- if (igetl(map, ip, &ip->imm) < 0)
- return 0;
- /* TO DO: REX */
- } else {
- if (igets(map, ip, &s)< 0)
- return 0;
- ip->imm = s&0xffff;
- }
- break;
- case Iwds: /* Operand-sized immediate (sign extended) */
- if (ip->osize == 'L') {
- if (igetl(map, ip, &ip->imm) < 0)
- return 0;
- } else {
- if (igets(map, ip, &s)< 0)
- return 0;
- if (s&0x8000)
- ip->imm = s|0xffff0000;
- else
- ip->imm = s&0xffff;
- }
- ip->jumptype = Iwds;
- break;
- case OA: /* literal 0x0a byte */
- if (igetc(map, ip, &c) < 0)
- return 0;
- if (c != 0x0a)
- goto badop;
- break;
- case R0: /* base register must be R0 */
- if (ip->base != 0)
- goto badop;
- break;
- case R1: /* base register must be R1 */
- if (ip->base != 1)
- goto badop;
- break;
- case RMB: /* R/M field with byte register (/r)*/
- if (igetc(map, ip, &c) < 0)
- return 0;
- if (modrm(map, ip, c) < 0)
- return 0;
- ip->osize = 'B';
- break;
- case RM: /* R/M field with register (/r) */
- if (igetc(map, ip, &c) < 0)
- return 0;
- if (modrm(map, ip, c) < 0)
- return 0;
- break;
- case RMOPB: /* R/M field with op code (/digit) */
- if (igetc(map, ip, &c) < 0)
- return 0;
- if (modrm(map, ip, c) < 0)
- return 0;
- c = ip->reg; /* secondary op code */
- obase = (Optable*)op->proto;
- ip->osize = 'B';
- goto newop;
- case RMOP: /* R/M field with op code (/digit) */
- if (igetc(map, ip, &c) < 0)
- return 0;
- if (modrm(map, ip, c) < 0)
- return 0;
- obase = (Optable*)op->proto;
- if(ip->amd64 && obase == optab0F01 && c == 0xF8)
- return optab0F01F8;
- c = ip->reg;
- goto newop;
- case FRMOP: /* FP R/M field with op code (/digit) */
- if (igetc(map, ip, &c) < 0)
- return 0;
- if (modrm(map, ip, c) < 0)
- return 0;
- if ((c&0xc0) == 0xc0)
- c = ip->reg+8; /* 16 entry table */
- else
- c = ip->reg;
- obase = (Optable*)op->proto;
- goto newop;
- case FRMEX: /* Extended FP R/M field with op code (/digit) */
- if (igetc(map, ip, &c) < 0)
- return 0;
- if (modrm(map, ip, c) < 0)
- return 0;
- if ((c&0xc0) == 0xc0)
- c = (c&0x3f)+8; /* 64-entry table */
- else
- c = ip->reg;
- obase = (Optable*)op->proto;
- goto newop;
- case RMR: /* R/M register only (mod = 11) */
- if (igetc(map, ip, &c) < 0)
- return 0;
- if ((c&0xc0) != 0xc0) {
- werrstr("invalid R/M register: %x", c);
- return 0;
- }
- if (modrm(map, ip, c) < 0)
- return 0;
- break;
- case RMM: /* R/M register only (mod = 11) */
- if (igetc(map, ip, &c) < 0)
- return 0;
- if ((c&0xc0) == 0xc0) {
- werrstr("invalid R/M memory mode: %x", c);
- return 0;
- }
- if (modrm(map, ip, c) < 0)
- return 0;
- break;
- case PTR: /* Seg:Displacement addr (ptr16:16 or ptr16:32) */
- if (ip->osize == 'L') {
- if (igetl(map, ip, &ip->disp) < 0)
- return 0;
- } else {
- if (igets(map, ip, &s)< 0)
- return 0;
- ip->disp = s&0xffff;
- }
- if (igets(map, ip, (uint16_t*)&ip->seg) < 0)
- return 0;
- ip->jumptype = PTR;
- break;
- case AUXMM: /* Multi-byte op code; prefix determines table selection */
- if (igetc(map, ip, &c) < 0)
- return 0;
- obase = (Optable*)op->proto;
- switch (ip->opre) {
- case 0x66: op = optab660F; break;
- case 0xF2: op = optabF20F; break;
- case 0xF3: op = optabF30F; break;
- default: op = nil; break;
- }
- if(op != nil && op[c].proto != nil)
- obase = op;
- norex = 1; /* no more rex prefixes */
- /* otherwise the optab entry captures it */
- goto newop;
- case AUX: /* Multi-byte op code - Auxiliary table */
- obase = (Optable*)op->proto;
- if (igetc(map, ip, &c) < 0)
- return 0;
- goto newop;
- case OPRE: /* Instr Prefix or media op */
- ip->opre = c;
- /* fall through */
- case PRE: /* Instr Prefix */
- ip->prefix = (char*)op->proto;
- if (igetc(map, ip, &c) < 0)
- return 0;
- if (ip->opre && c == 0x0F)
- ip->prefix = 0;
- goto newop;
- case SEG: /* Segment Prefix */
- ip->segment = (char*)op->proto;
- if (igetc(map, ip, &c) < 0)
- return 0;
- goto newop;
- case OPOVER: /* Operand size override */
- ip->opre = c;
- ip->osize = 'W';
- if (igetc(map, ip, &c) < 0)
- return 0;
- if (c == 0x0F)
- ip->osize = 'L';
- else if (ip->amd64 && (c&0xF0) == 0x40)
- ip->osize = 'Q';
- goto newop;
- case ADDOVER: /* Address size override */
- ip->asize = 0;
- if (igetc(map, ip, &c) < 0)
- return 0;
- goto newop;
- case JUMP: /* mark instruction as JUMP or RET */
- case RET:
- ip->jumptype = op->operand[i];
- break;
- default:
- werrstr("bad operand type %d", op->operand[i]);
- return 0;
- }
- }
- return op;
- }
- #pragma varargck argpos bprint 2
- static void
- bprint(Instr *ip, char *fmt, ...)
- {
- va_list arg;
- va_start(arg, fmt);
- ip->curr = vseprint(ip->curr, ip->end, fmt, arg);
- va_end(arg);
- }
- /*
- * if we want to call 16 bit regs AX,BX,CX,...
- * and 32 bit regs EAX,EBX,ECX,... then
- * change the defs of ANAME and ONAME to:
- * #define ANAME(ip) ((ip->asize == 'E' ? "E" : "")
- * #define ONAME(ip) ((ip)->osize == 'L' ? "E" : "")
- */
- #define ANAME(ip) ""
- #define ONAME(ip) ""
- static char *reg[] = {
- [AX] = "AX",
- [CX] = "CX",
- [DX] = "DX",
- [BX] = "BX",
- [SP] = "SP",
- [BP] = "BP",
- [SI] = "SI",
- [DI] = "DI",
- /* amd64 */
- [R8] = "R8",
- [R9] = "R9",
- [R10] = "R10",
- [R11] = "R11",
- [R12] = "R12",
- [R13] = "R13",
- [R14] = "R14",
- [R15] = "R15",
- };
- static char *breg[] = { "AL", "CL", "DL", "BL", "AH", "CH", "DH", "BH" };
- static char *breg64[] = { "AL", "CL", "DL", "BL", "SPB", "BPB", "SIB", "DIB",
- "R8B", "R9B", "R10B", "R11B", "R12B", "R13B", "R14B", "R15B" };
- static char *sreg[] = { "ES", "CS", "SS", "DS", "FS", "GS" };
- static void
- plocal(Instr *ip)
- {
- int ret;
- int32_t offset;
- Symbol s;
- char *reg;
- offset = ip->disp;
- if (!findsym(ip->addr, CTEXT, &s) || !findlocal(&s, FRAMENAME, &s)) {
- bprint(ip, "%lux(SP)", offset);
- return;
- }
- if (s.value > ip->disp) {
- ret = getauto(&s, s.value-ip->disp-mach->szaddr, CAUTO, &s);
- reg = "(SP)";
- } else {
- offset -= s.value;
- ret = getauto(&s, offset, CPARAM, &s);
- reg = "(FP)";
- }
- if (ret)
- bprint(ip, "%s+", s.name);
- else
- offset = ip->disp;
- bprint(ip, "%lux%s", offset, reg);
- }
- static int
- isjmp(Instr *ip)
- {
- switch(ip->jumptype){
- case Iwds:
- case Jbs:
- case JUMP:
- return 1;
- default:
- return 0;
- }
- }
- /*
- * This is too smart for its own good, but it really is nice
- * to have accurate translations when debugging, and it
- * helps us identify which code is different in binaries that
- * are changed on sources.
- */
- static int
- issymref(Instr *ip, Symbol *s, int32_t w, int32_t val)
- {
- Symbol next, tmp;
- int32_t isstring, size;
- if (isjmp(ip))
- return 1;
- if (s->class==CTEXT && w==0)
- return 1;
- if (s->class==CDATA) {
- /* use first bss symbol (or "end") rather than edata */
- if (s->name[0]=='e' && strcmp(s->name, "edata") == 0){
- if((s ->index >= 0 && globalsym(&tmp, s->index+1) && tmp.value==s->value)
- || (s->index > 0 && globalsym(&tmp, s->index-1) && tmp.value==s->value))
- *s = tmp;
- }
- if (w == 0)
- return 1;
- for (next=*s; next.value==s->value; next=tmp)
- if (!globalsym(&tmp, next.index+1))
- break;
- size = next.value - s->value;
- if (w >= size)
- return 0;
- if (w > size-w)
- w = size-w;
- /* huge distances are usually wrong except in .string */
- isstring = (s->name[0]=='.' && strcmp(s->name, ".string") == 0);
- if (w > 8192 && !isstring)
- return 0;
- /* medium distances are tricky - look for constants */
- /* near powers of two */
- if ((val&(val-1)) == 0 || (val&(val+1)) == 0)
- return 0;
- return 1;
- }
- return 0;
- }
- static void
- immediate(Instr *ip, int64_t val)
- {
- Symbol s;
- int32_t w;
- if (findsym(val, CANY, &s)) { /* TO DO */
- w = val - s.value;
- if (w < 0)
- w = -w;
- if (issymref(ip, &s, w, val)) {
- if (w)
- bprint(ip, "%s+%lux(SB)", s.name, w);
- else
- bprint(ip, "%s(SB)", s.name);
- return;
- }
- /*
- if (s.class==CDATA && globalsym(&s, s.index+1)) {
- w = s.value - val;
- if (w < 0)
- w = -w;
- if (w < 4096) {
- bprint(ip, "%s-%lux(SB)", s.name, w);
- return;
- }
- }
- */
- }
- if((ip->rex & REXW) == 0)
- bprint(ip, "%lux", (int32_t)val);
- else
- bprint(ip, "%llux", val);
- }
- static void
- pea(Instr *ip)
- {
- if (ip->mod == 3) {
- if (ip->osize == 'B')
- bprint(ip, (ip->rex & REXB? breg64: breg)[ip->base]);
- else if(ip->rex & REXB)
- bprint(ip, "%s%s", ANAME(ip), reg[ip->base+8]);
- else
- bprint(ip, "%s%s", ANAME(ip), reg[ip->base]);
- return;
- }
- if (ip->segment)
- bprint(ip, ip->segment);
- if (ip->asize == 'E' && ip->base == SP)
- plocal(ip);
- else {
- if (ip->base < 0)
- immediate(ip, ip->disp);
- else {
- bprint(ip, "%lux", ip->disp);
- if(ip->rip)
- bprint(ip, "(RIP)");
- bprint(ip,"(%s%s)", ANAME(ip), reg[ip->rex&REXB? ip->base+8: ip->base]);
- }
- }
- if (ip->index >= 0)
- bprint(ip,"(%s%s*%d)", ANAME(ip), reg[ip->rex&REXX? ip->index+8: ip->index], 1<<ip->ss);
- }
- static void
- prinstr(Instr *ip, char *fmt)
- {
- int64_t v;
- if (ip->prefix)
- bprint(ip, "%s ", ip->prefix);
- for (; *fmt && ip->curr < ip->end; fmt++) {
- if (*fmt != '%'){
- *ip->curr++ = *fmt;
- continue;
- }
- switch(*++fmt){
- case '%':
- *ip->curr++ = '%';
- break;
- case 'A':
- bprint(ip, "%s", ANAME(ip));
- break;
- case 'C':
- bprint(ip, "CR%d", ip->reg);
- break;
- case 'D':
- if (ip->reg < 4 || ip->reg == 6 || ip->reg == 7)
- bprint(ip, "DR%d",ip->reg);
- else
- bprint(ip, "???");
- break;
- case 'I':
- bprint(ip, "$");
- immediate(ip, ip->imm2);
- break;
- case 'O':
- bprint(ip,"%s", ONAME(ip));
- break;
- case 'i':
- bprint(ip, "$");
- v = ip->imm;
- if(ip->rex & REXW)
- v = ip->imm64;
- immediate(ip, v);
- break;
- case 'R':
- bprint(ip, "%s%s", ONAME(ip), reg[ip->rex&REXR? ip->reg+8: ip->reg]);
- break;
- case 'S':
- if(ip->osize == 'Q' || ip->osize == 'L' && ip->rex & REXW)
- bprint(ip, "Q");
- else
- bprint(ip, "%c", ip->osize);
- break;
- case 's':
- if(ip->opre == 0 || ip->opre == 0x66)
- bprint(ip, "P");
- else
- bprint(ip, "S");
- if(ip->opre == 0xf2 || ip->opre == 0x66)
- bprint(ip, "D");
- else
- bprint(ip, "S");
- break;
- case 'T':
- if (ip->reg == 6 || ip->reg == 7)
- bprint(ip, "TR%d",ip->reg);
- else
- bprint(ip, "???");
- break;
- case 'W':
- if (ip->osize == 'Q' || ip->osize == 'L' && ip->rex & REXW)
- bprint(ip, "CDQE");
- else if (ip->osize == 'L')
- bprint(ip,"CWDE");
- else
- bprint(ip, "CBW");
- break;
- case 'd':
- bprint(ip,"%ux:%lux",ip->seg,ip->disp);
- break;
- case 'm':
- if (ip->mod == 3 && ip->osize != 'B') {
- if(fmt[1] != '*'){
- if(ip->opre != 0) {
- bprint(ip, "X%d", ip->rex&REXB? ip->base+8: ip->base);
- break;
- }
- } else
- fmt++;
- bprint(ip, "M%d", ip->base);
- break;
- }
- pea(ip);
- break;
- case 'e':
- pea(ip);
- break;
- case 'f':
- bprint(ip, "F%d", ip->base);
- break;
- case 'g':
- if (ip->reg < 6)
- bprint(ip,"%s",sreg[ip->reg]);
- else
- bprint(ip,"???");
- break;
- case 'p':
- /*
- * signed immediate in the ulong ip->imm.
- */
- v = (int32_t)ip->imm;
- immediate(ip, v+ip->addr+ip->n);
- break;
- case 'r':
- if (ip->osize == 'B')
- bprint(ip,"%s", (ip->rex? breg64: breg)[ip->rex&REXR? ip->reg+8: ip->reg]);
- else
- bprint(ip, reg[ip->rex&REXR? ip->reg+8: ip->reg]);
- break;
- case 'w':
- if (ip->osize == 'Q' || ip->rex & REXW)
- bprint(ip, "CQO");
- else if (ip->osize == 'L')
- bprint(ip,"CDQ");
- else
- bprint(ip, "CWD");
- break;
- case 'M':
- if(ip->opre != 0)
- bprint(ip, "X%d", ip->rex&REXR? ip->reg+8: ip->reg);
- else
- bprint(ip, "M%d", ip->reg);
- break;
- case 'x':
- if (ip->mod == 3 && ip->osize != 'B') {
- bprint(ip, "X%d", ip->rex&REXB? ip->base+8: ip->base);
- break;
- }
- pea(ip);
- break;
- case 'X':
- bprint(ip, "X%d", ip->rex&REXR? ip->reg+8: ip->reg);
- break;
- default:
- bprint(ip, "%%%c", *fmt);
- break;
- }
- }
- *ip->curr = 0; /* there's always room for 1 byte */
- }
- static int
- i386inst(Map *map, uint64_t pc, char modifier, char *buf, int n)
- {
- Instr instr;
- Optable *op;
- USED(modifier);
- op = mkinstr(map, &instr, pc);
- if (op == 0) {
- errstr(buf, n);
- return -1;
- }
- instr.curr = buf;
- instr.end = buf+n-1;
- prinstr(&instr, op->proto);
- return instr.n;
- }
- static int
- i386das(Map *map, uint64_t pc, char *buf, int n)
- {
- Instr instr;
- int i;
- if (mkinstr(map, &instr, pc) == 0) {
- errstr(buf, n);
- return -1;
- }
- for(i = 0; i < instr.n && n > 2; i++) {
- _hexify(buf, instr.mem[i], 1);
- buf += 2;
- n -= 2;
- }
- *buf = 0;
- return instr.n;
- }
- static int
- i386instlen(Map *map, uint64_t pc)
- {
- Instr i;
- if (mkinstr(map, &i, pc))
- return i.n;
- return -1;
- }
- static int
- i386foll(Map *map, uint64_t pc, Rgetter rget, uint64_t *foll)
- {
- Instr i;
- Optable *op;
- uint16_t s;
- uint64_t l, addr;
- int64_t v;
- int n;
- op = mkinstr(map, &i, pc);
- if (!op)
- return -1;
- n = 0;
- switch(i.jumptype) {
- case RET: /* RETURN or LEAVE */
- case Iw: /* RETURN */
- if (strcmp(op->proto, "LEAVE") == 0) {
- if (geta(map, (*rget)(map, "BP"), &l) < 0)
- return -1;
- } else if (geta(map, (*rget)(map, mach->sp), &l) < 0)
- return -1;
- foll[0] = l;
- return 1;
- case Iwds: /* pc relative JUMP or CALL*/
- case Jbs: /* pc relative JUMP or CALL */
- v = (int32_t)i.imm;
- foll[0] = pc+v+i.n;
- n = 1;
- break;
- case PTR: /* seg:displacement JUMP or CALL */
- foll[0] = (i.seg<<4)+i.disp;
- return 1;
- case JUMP: /* JUMP or CALL EA */
- if(i.mod == 3) {
- foll[0] = (*rget)(map, reg[i.rex&REXB? i.base+8: i.base]);
- return 1;
- }
- /* calculate the effective address */
- addr = i.disp;
- if (i.base >= 0) {
- if (geta(map, (*rget)(map, reg[i.rex&REXB? i.base+8: i.base]), &l) < 0)
- return -1;
- addr += l;
- }
- if (i.index >= 0) {
- if (geta(map, (*rget)(map, reg[i.rex&REXX? i.index+8: i.index]), &l) < 0)
- return -1;
- addr += l*(1<<i.ss);
- }
- /* now retrieve a seg:disp value at that address */
- if (get2(map, addr, &s) < 0) /* seg */
- return -1;
- foll[0] = s<<4;
- addr += 2;
- if (i.asize == 'L') {
- if (geta(map, addr, &l) < 0) /* disp32 */
- return -1;
- foll[0] += l;
- } else { /* disp16 */
- if (get2(map, addr, &s) < 0)
- return -1;
- foll[0] += s;
- }
- return 1;
- default:
- break;
- }
- if (strncmp(op->proto,"JMP", 3) == 0 || strncmp(op->proto,"CALL", 4) == 0)
- return 1;
- foll[n++] = pc+i.n;
- return n;
- }
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