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plan9port / plan9 / 82112d0434ede36c05d51840c117aca282156e9a / . / src / libmach / mach386.c
blob: 336cec352d6d41b22eeea233441e7308cad81467 [file] [log] [blame]
/*
* 386 definition
*/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <mach.h>
#include "ureg386.h"
#define REGOFF(x) (ulong)(&((struct Ureg *) 0)->x)
#define REGSIZE sizeof(struct Ureg)
#define FP_CTL(x) (REGSIZE+4*(x))
#define FP_REG(x) (FP_CTL(7)+10*(x))
#define FPREGSIZE (6*4+8*10)
/*
* i386-specific debugger interface
*/
char *i386excep(Map*, Regs*);
/*
static int i386trace(Map*, ulong, ulong, ulong, Tracer);
static ulong i386frame(Map*, ulong, ulong, ulong, ulong);
*/
int i386foll(Map*, Regs*, u64int, u64int*);
int i386hexinst(Map*, u64int, char*, int);
int i386das(Map*, u64int, char, char*, int);
int i386instlen(Map*, u64int);
int i386unwind(Map*, Regs*, u64int*, Symbol*);
static char *i386windregs[] = {
"PC",
"SP",
"BP",
"AX",
"CX",
"DX",
"BX",
"SI",
"DI",
0,
};
static Regdesc i386reglist[] = {
{"DI", REGOFF(di), RINT, 'X'},
{"SI", REGOFF(si), RINT, 'X'},
{"BP", REGOFF(bp), RINT, 'X'},
{"BX", REGOFF(bx), RINT, 'X'},
{"DX", REGOFF(dx), RINT, 'X'},
{"CX", REGOFF(cx), RINT, 'X'},
{"AX", REGOFF(ax), RINT, 'X'},
{"GS", REGOFF(gs), RINT, 'X'},
{"FS", REGOFF(fs), RINT, 'X'},
{"ES", REGOFF(es), RINT, 'X'},
{"DS", REGOFF(ds), RINT, 'X'},
{"TRAP", REGOFF(trap), RINT, 'X'},
{"ECODE", REGOFF(ecode), RINT, 'X'},
{"PC", REGOFF(pc), RINT, 'X'},
{"CS", REGOFF(cs), RINT, 'X'},
{"EFLAGS", REGOFF(flags), RINT, 'X'},
{"SP", REGOFF(sp), RINT, 'X'},
{"SS", REGOFF(ss), RINT, 'X'},
{"E0", FP_CTL(0), RFLT, 'X'},
{"E1", FP_CTL(1), RFLT, 'X'},
{"E2", FP_CTL(2), RFLT, 'X'},
{"E3", FP_CTL(3), RFLT, 'X'},
{"E4", FP_CTL(4), RFLT, 'X'},
{"E5", FP_CTL(5), RFLT, 'X'},
{"E6", FP_CTL(6), RFLT, 'X'},
{"F0", FP_REG(7), RFLT, '3'},
{"F1", FP_REG(6), RFLT, '3'},
{"F2", FP_REG(5), RFLT, '3'},
{"F3", FP_REG(4), RFLT, '3'},
{"F4", FP_REG(3), RFLT, '3'},
{"F5", FP_REG(2), RFLT, '3'},
{"F6", FP_REG(1), RFLT, '3'},
{"F7", FP_REG(0), RFLT, '3'},
{ 0 }
};
Mach mach386 =
{
"386",
M386, /* machine type */
i386reglist, /* register list */
REGSIZE, /* size of registers in bytes */
FPREGSIZE, /* size of fp registers in bytes */
"PC", /* name of PC */
"SP", /* name of SP */
"BP", /* name of FP */
0, /* link register */
"setSB", /* static base register name (bogus anyways) */
0, /* static base register value */
0x1000, /* page size */
0x80100000, /* kernel base */
0, /* kernel text mask */
1, /* quantization of pc */
4, /* szaddr */
4, /* szreg */
4, /* szfloat */
8, /* szdouble */
i386windregs, /* locations unwound in stack trace */
9,
{0xCC, 0, 0, 0}, /* break point: INT 3 */
1, /* break point size */
i386foll, /* following addresses */
i386excep, /* print exception */
i386unwind, /* stack unwind */
leswap2, /* convert short to local byte order */
leswap4, /* convert long to local byte order */
leswap8, /* convert vlong to local byte order */
leieeeftoa32, /* single precision float pointer */
leieeeftoa64, /* double precision float pointer */
leieeeftoa80, /* long double precision floating point */
i386das, /* dissembler */
i386das, /* plan9-format disassembler */
0, /* commercial disassembler */
i386hexinst, /* print instruction */
i386instlen, /* instruction size calculation */
};
/*
* The wrapper code around Linux system calls
* saves AX on the stack before calling some calls
* (at least, __libc_nanosleep), when running in
* threaded programs.
*/
static void
syscallhack(Map *map, Regs *regs, int *spoff)
{
u64int pc;
char buf[60];
rget(regs, "PC", &pc);
if(i386das(map, pc-2, 0, buf, sizeof buf) != 2 || strncmp(buf, "INTB\t$", 6) != 0)
return;
if(i386das(map, pc, 0, buf, sizeof buf) != 2 || strcmp(buf, "MOVL\tDX,BX") != 0)
return;
if(i386das(map, pc+2, 0, buf, sizeof buf) != 3 || strcmp(buf, "XCHGL\tAX,0(SP)") != 0)
return;
*spoff += 4;
}
int
i386unwind(Map *map, Regs *regs, u64int *next, Symbol *sym)
{
int i, isp, ipc, ibp, havebp, n, spoff, off[9];
ulong pc;
u32int v;
char buf[60], *p;
/*print("i386unwind %s\n", sym ? sym->name : nil); */
isp = windindex("SP");
ipc = windindex("PC");
ibp = windindex("BP");
if(isp < 0 || ipc < 0 || ibp < 0){
werrstr("i386unwind: cannot happen");
return -1;
}
/*
* Disassemble entry to figure out
* where values have been saved.
* Perhaps should disassemble exit path
* instead -- a random walk on the code
* should suffice to get us to a RET.
*/
if(sym){
pc = sym->loc.addr;
/*print("startpc %lux\n", pc); */
memset(off, 0xff, sizeof off);
spoff = 0;
havebp = 0;
for(;;){
if((n = i386das(map, pc, 0, buf, sizeof buf)) < 0)
break;
/*print("%s\n", buf); */
pc += n;
if(strncmp(buf, "PUSHL\t", 6) == 0){
spoff += 4;
if((i = windindex(buf+6)) >= 0)
off[i] = spoff;
}else if(strcmp(buf, "MOVL\tSP,BP") == 0 && spoff == 4 && off[ibp] == 4){
havebp = 1;
}else if(strncmp(buf, "SUBL\t$", 6) == 0){
if((p = strrchr(buf, ',')) && strcmp(p, ",SP") == 0){
/*print("spoff %s\n", buf+6); */
spoff += strtol(buf+6, 0, 16);
}
break;
}else if(strncmp(buf, "XORL\t", 5) == 0 || strncmp(buf, "MOVL\t", 5) == 0){
/*
* Hope these are rescheduled non-prologue instructions
* like XORL AX, AX or MOVL $0x3, AX and thus ignorable.
*/
}else
break;
}
syscallhack(map, regs, &spoff);
if(havebp){
/*print("havebp\n"); */
rget(regs, "BP", &next[isp]);
get4(map, next[isp], &v);
next[ibp] = v;
next[isp] += 4;
}else{
rget(regs, "SP", &next[isp]);
/*print("old sp %lux + %d\n", next[isp], spoff); */
next[isp] += spoff;
}
for(i=0; i<nelem(off); i++)
if(off[i] != -1){
get4(map, next[isp]-off[i], &v);
next[i] = v;
}
if(get4(map, next[isp], &v) < 0)
return -1;
/*print("new pc %lux => %lux\n", next[isp], v); */
next[ipc] = v;
next[isp] += 4;
return 0;
}
/*
* Rely on bp chaining
*/
if(rget(regs, "BP", &next[isp]) < 0
|| get4(map, next[isp], &v) < 0)
return -1;
next[ibp] = v;
next[isp] += 4;
if(get4(map, next[isp], &v) < 0)
return -1;
next[ipc] = v;
next[isp] += 4;
return 0;
}
/*static char STARTSYM[] = "_main"; */
/*static char PROFSYM[] = "_mainp"; */
static char FRAMENAME[] = ".frame";
static char *excname[] =
{
"divide error", /* 0 */
"debug exception", /* 1 */
0,0, /* 2, 3 */
"overflow", /* 4 */
"bounds check", /* 5 */
"invalid opcode", /* 6 */
"math coprocessor emulation", /* 7 */
"double fault", /* 8 */
"math coprocessor overrun", /* 9 */
"invalid TSS", /* 10 */
"segment not present", /* 11 */
"stack exception", /* 12 */
"general protection violation", /* 13 */
"page fault", /* 14 */
0, /* 15 */
"math coprocessor error", /* 16 */
0,0,0,0,0,0,0, /* 17-23 */
"clock", /* 24 */
"keyboard", /* 25 */
0, /* 26 */
"modem status", /* 27 */
"serial line status", /* 28 */
0, /* 29 */
"floppy disk", /* 30 */
0,0,0,0,0, /* 31-35 */
"mouse", /* 36 */
"math coprocessor", /* 37 */
"hard disk", /* 38 */
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,/* 39-54 */
0,0,0,0,0,0,0,0,0, /* 55-63 */
"system call", /* 64 */
};
char*
i386excep(Map *map, Regs *regs)
{
u64int c;
u64int pc;
static char buf[16];
if(rget(regs, "TRAP", &c) < 0)
return "no trap register";
if(c > 64 || excname[c] == 0) {
if (c == 3) {
if (rget(regs, "PC", &pc) >= 0)
if (get1(map, pc, (uchar*)buf, mach->bpsize) > 0)
if (memcmp(buf, mach->bpinst, mach->bpsize) == 0)
return "breakpoint";
}
sprint(buf, "exception %ld", c);
return buf;
} else
return excname[c];
}
/* 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 */
schar index; /* bits 3-5 of SIB */
schar 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 */
uint32 disp; /* displacement */
uint32 imm; /* immediate */
uint32 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 */
/* be careful: some unix system headers #define R8, R9, etc */
AMD64_R8,
AMD64_R9,
AMD64_R10,
AMD64_R11,
AMD64_R12,
AMD64_R13,
AMD64_R14,
AMD64_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 int32 R/M field with register (/r) */
RMB, /* Byte R/M field with register (/r) */
RMOP, /* Word or int32 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) */
Op_R0, /* Base reg of Mod R/M is literal 0x00 */
Op_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" },
[0x77] = { 0,0, "EMMS" },
[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 %x,%X,%#i" },
[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" },
[0x08] = { 0,0, "FCMOVCS %f,F0" },
[0x09] = { 0,0, "FCMOVEQ %f,F0" },
[0x0a] = { 0,0, "FCMOVLS %f,F0" },
[0x0b] = { 0,0, "FCMOVUN %f,F0" },
[0x0d] = { Op_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" },
[0x08] = { 0,0, "FCMOVCC F0,F0" }, /* Mod R/M = 11xx xxxx*/
[0x09] = { 0,0, "FCMOVCC F1,F0" },
[0x0a] = { 0,0, "FCMOVCC F2,F0" },
[0x0b] = { 0,0, "FCMOVCC F3,F0" },
[0x0c] = { 0,0, "FCMOVCC F4,F0" },
[0x0d] = { 0,0, "FCMOVCC F5,F0" },
[0x0e] = { 0,0, "FCMOVCC F6,F0" },
[0x0f] = { 0,0, "FCMOVCC F7,F0" },
[0x10] = { 0,0, "FCMOVNE F0,F0" },
[0x11] = { 0,0, "FCMOVNE F1,F0" },
[0x12] = { 0,0, "FCMOVNE F2,F0" },
[0x13] = { 0,0, "FCMOVNE F3,F0" },
[0x14] = { 0,0, "FCMOVNE F4,F0" },
[0x15] = { 0,0, "FCMOVNE F5,F0" },
[0x16] = { 0,0, "FCMOVNE F6,F0" },
[0x17] = { 0,0, "FCMOVNE F7,F0" },
[0x18] = { 0,0, "FCMOVHI F0,F0" },
[0x19] = { 0,0, "FCMOVHI F1,F0" },
[0x1a] = { 0,0, "FCMOVHI F2,F0" },
[0x1b] = { 0,0, "FCMOVHI F3,F0" },
[0x1c] = { 0,0, "FCMOVHI F4,F0" },
[0x1d] = { 0,0, "FCMOVHI F5,F0" },
[0x1e] = { 0,0, "FCMOVHI F6,F0" },
[0x1f] = { 0,0, "FCMOVHI F7,F0" },
[0x20] = { 0,0, "FCMOVNU F0,F0" },
[0x21] = { 0,0, "FCMOVNU F1,F0" },
[0x22] = { 0,0, "FCMOVNU F2,F0" },
[0x23] = { 0,0, "FCMOVNU F3,F0" },
[0x24] = { 0,0, "FCMOVNU F4,F0" },
[0x25] = { 0,0, "FCMOVNU F5,F0" },
[0x26] = { 0,0, "FCMOVNU F6,F0" },
[0x27] = { 0,0, "FCMOVNU F7,F0" },
[0x2a] = { 0,0, "FCLEX" },
[0x2b] = { 0,0, "FINIT" },
[0x30] = { 0,0, "FUCOMI F0,F0" },
[0x31] = { 0,0, "FUCOMI F1,F0" },
[0x32] = { 0,0, "FUCOMI F2,F0" },
[0x33] = { 0,0, "FUCOMI F3,F0" },
[0x34] = { 0,0, "FUCOMI F4,F0" },
[0x35] = { 0,0, "FUCOMI F5,F0" },
[0x36] = { 0,0, "FUCOMI F6,F0" },
[0x37] = { 0,0, "FUCOMI F7,F0" },
[0x38] = { 0,0, "FCOMI F0,F0" },
[0x39] = { 0,0, "FCOMI F1,F0" },
[0x3a] = { 0,0, "FCOMI F2,F0" },
[0x3b] = { 0,0, "FCOMI F3,F0" },
[0x3c] = { 0,0, "FCOMI F4,F0" },
[0x3d] = { 0,0, "FCOMI F5,F0" },
[0x3e] = { 0,0, "FCOMI F6,F0" },
[0x3f] = { 0,0, "FCOMI F7,F0" },
};
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] = { Op_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] = { Op_R0,0, "FSTSW %OAX" },
[0x0d] = { 0,0, "FUCOMIP F0,%f" },
[0x0e] = { 0,0, "FCOMIP F0,%f" },
};
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+2] =
{
[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 %e,%r" },
[0x101] = { RM,0, "MOVLQZX %e,%r" },
};
/*
* 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, uint32 *lp)
{
ushort s;
int32 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)
{
uint32 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 = (machcpu == &machamd64);
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){
if(ip->rex&REXW)
op = &obase[0x100]; /* MOVLQSX */
else
op = &obase[0x101]; /* MOVLQZX */
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)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)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)(~0ULL << 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 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 Op_R0: /* base register must be R0 */
if (ip->base != 0)
goto badop;
break;
case Op_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 */
[AMD64_R8] = "R8",
[AMD64_R9] = "R9",
[AMD64_R10] = "R10",
[AMD64_R11] = "R11",
[AMD64_R12] = "R12",
[AMD64_R13] = "R13",
[AMD64_R14] = "R14",
[AMD64_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)
{
Symbol s;
char *name;
Loc l, li;
l.type = LOFFSET;
l.offset = ip->disp;
if(ip->base == SP)
l.reg = "SP";
else
l.reg = "BP";
li.type = LADDR;
li.addr = ip->addr;
if(findsym(li, CTEXT, &s) < 0)
goto raw;
name = nil;
if(ip->base==SP && lookuplsym(&s, FRAMENAME, &s) >= 0) {
/* translate stack offset to offset from plan 9 frame pointer*/
/* XXX not sure how to do this */
}
if(name==nil && findlsym(&s, l, &s) >= 0)
name = s.name;
if(name)
bprint(ip, "%s+", name);
raw:
bprint(ip, "%#lx(%s)", l.offset, l.reg);
/*
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, "%ux%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 w, int32 val)
{
Symbol next, tmp;
int32 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((indexsym(s->index+1, &tmp) && loccmp(&tmp.loc, &s->loc) == 0)
|| (indexsym(s->index-1, &tmp) && loccmp(&tmp.loc, &s->loc) == 0))
*s = tmp;
}
if (w == 0)
return 1;
for (next=*s; next.loc.addr==s->loc.addr; next=tmp)
if (!indexsym(next.index+1, &tmp))
break;
size = next.loc.addr - s->loc.addr;
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;
Loc l;
l.type = LADDR;
l.addr = val;
if (findsym(l, CANY, &s) >= 0) { /* TO DO */
w = val - s.loc.addr;
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)[(uchar)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[(uchar)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, "%ux", 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)
{
int sharp;
vlong v;
if (ip->prefix)
bprint(ip, "%s ", ip->prefix);
for (; *fmt && ip->curr < ip->end; fmt++) {
if (*fmt != '%'){
*ip->curr++ = *fmt;
continue;
}
sharp = 0;
if(*++fmt == '#') {
sharp = 1;
++fmt;
}
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':
if(!sharp)
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:%ux", 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 uint32 ip->imm.
*/
v = (int32)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 */
}
int
i386das(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;
}
int
i386hexinst(Map *map, u64int 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;
}
int
i386instlen(Map *map, u64int pc)
{
Instr i;
if (mkinstr(map, &i, pc))
return i.n;
return -1;
}
int
i386foll(Map *map, Regs *regs, u64int pc, u64int *foll)
{
Instr i;
Optable *op;
ushort s;
u64int 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 (lgeta(map, regs, locindir("BP", 0), &l) < 0)
return -1;
} else if (lgeta(map, regs, locindir(mach->sp, 0), &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)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) {
if (rget(regs, reg[i.rex&REXB? i.base+8: i.base], &foll[0]) < 0)
return -1;
return 1;
}
/* calculate the effective address */
addr = i.disp;
if (i.base >= 0) {
if (lgeta(map, regs, locindir(reg[i.rex&REXB? i.base+8: i.base], 0), &l) < 0)
return -1;
addr += l;
}
if (i.index >= 0) {
if (lgeta(map, regs, locindir(reg[i.rex&REXX? i.index+8: i.index], 0), &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;
}