#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*, uvlong, uvlong, uvlong, Tracer);
static uvlong i386frame(Map*, uvlong, uvlong, uvlong, uvlong);
static int i386foll(Map*, uvlong, Rgetter, uvlong*);
static int i386inst(Map*, uvlong, char, char*, int);
static int i386das(Map*, uvlong, char*, int);
static int i386instlen(Map*, uvlong);
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)
{
ulong c;
uvlong 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, (uchar*)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, uvlong pc, uvlong sp, uvlong link, Tracer trace)
{
int i;
uvlong 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 uvlong
i386frame(Map *map, uvlong addr, uvlong pc, uvlong sp, uvlong 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
{
uchar mem[1+1+1+1+2+1+1+4+4]; /* raw instruction */
uvlong addr; /* address of start of instruction */
int n; /* number of bytes in instruction */
char *prefix; /* instr prefix */
char *segment; /* segment override */
uchar jumptype; /* set to the operand type for jump/ret/call */
uchar amd64;
uchar 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) */
uchar mod; /* bits 6-7 of mod r/m field */
uchar 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 */
uchar opre; /* f2/f3 could introduce media */
short seg; /* segment of far address */
ulong disp; /* displacement */
ulong imm; /* immediate */
ulong imm2; /* second immediate operand */
uvlong 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, uchar *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, ushort *sp)
{
uchar c;
ushort 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, ulong *lp)
{
ushort s;
long 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, vlong *qp)
{
ulong l;
uvlong q;
if (igetl(map, ip, &l) < 0)
return -1;
q = l;
if (igetl(map, ip, &l) < 0)
return -1;
q |= ((uvlong)l<<32);
*qp = q;
return 1;
}
static int
getdisp(Map *map, Instr *ip, int mod, int rm, int code, int pcrel)
{
uchar c;
ushort 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, uchar c)
{
uchar 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, uvlong pc)
{
int i, n, norex;
uchar c;
ushort 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 = (long)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 = (long)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 |= (vlong)~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) {
ulong l;
if (igetl(map, ip, &l) < 0)
return 0;
ip->imm64 |= (uvlong)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, (ushort*)&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;
long 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, long w, long val)
{
Symbol next, tmp;
long 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, vlong val)
{
Symbol s;
long 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", (long)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)
{
vlong 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 = (long)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, uvlong 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, uvlong 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, uvlong pc)
{
Instr i;
if (mkinstr(map, &i, pc))
return i.n;
return -1;
}
static int
i386foll(Map *map, uvlong pc, Rgetter rget, uvlong *foll)
{
Instr i;
Optable *op;
ushort s;
uvlong l, addr;
vlong 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 = (long)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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