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qemu/translate-i386.c
bellard 982b431579 added CPL/IOPL support - fixed subtle inc/dec flag optimisation bug - added HLT instruction 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@134 c046a42c-6fe2-441c-8c8c-71466251a162
2003-05-08 15:44:24 +00:00

3820 lines
102 KiB
C
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/*
* i386 translation
*
* Copyright (c) 2003 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include <signal.h>
#include <assert.h>
#include "disas.h"
#define DEBUG_DISAS
#define IN_OP_I386
#include "cpu-i386.h"
#ifndef offsetof
#define offsetof(type, field) ((size_t) &((type *)0)->field)
#endif
/* XXX: move that elsewhere */
static uint16_t *gen_opc_ptr;
static uint32_t *gen_opparam_ptr;
int __op_param1, __op_param2, __op_param3;
#ifdef __i386__
static inline void flush_icache_range(unsigned long start, unsigned long stop)
{
}
#endif
#ifdef __s390__
static inline void flush_icache_range(unsigned long start, unsigned long stop)
{
}
#endif
#ifdef __ia64__
static inline void flush_icache_range(unsigned long start, unsigned long stop)
{
}
#endif
#ifdef __powerpc__
#define MIN_CACHE_LINE_SIZE 8 /* conservative value */
static void inline flush_icache_range(unsigned long start, unsigned long stop)
{
unsigned long p;
p = start & ~(MIN_CACHE_LINE_SIZE - 1);
stop = (stop + MIN_CACHE_LINE_SIZE - 1) & ~(MIN_CACHE_LINE_SIZE - 1);
for (p = start; p < stop; p += MIN_CACHE_LINE_SIZE) {
asm ("dcbst 0,%0;" : : "r"(p) : "memory");
}
asm ("sync");
for (p = start; p < stop; p += MIN_CACHE_LINE_SIZE) {
asm ("icbi 0,%0; sync;" : : "r"(p) : "memory");
}
asm ("sync");
asm ("isync");
}
#endif
#ifdef __alpha__
static inline void flush_icache_range(unsigned long start, unsigned long stop)
{
asm ("imb");
}
#endif
#ifdef __sparc__
static void inline flush_icache_range(unsigned long start, unsigned long stop)
{
unsigned long p;
p = start & ~(8UL - 1UL);
stop = (stop + (8UL - 1UL)) & ~(8UL - 1UL);
for (; p < stop; p += 8)
__asm__ __volatile__("flush\t%0" : : "r" (p));
}
#endif
extern FILE *logfile;
extern int loglevel;
#define PREFIX_REPZ 0x01
#define PREFIX_REPNZ 0x02
#define PREFIX_LOCK 0x04
#define PREFIX_DATA 0x08
#define PREFIX_ADR 0x10
#define PREFIX_FWAIT 0x20
typedef struct DisasContext {
/* current insn context */
int override; /* -1 if no override */
int prefix;
int aflag, dflag;
uint8_t *pc; /* pc = eip + cs_base */
int is_jmp; /* 1 = means jump (stop translation), 2 means CPU
static state change (stop translation) */
/* current block context */
uint8_t *cs_base; /* base of CS segment */
int code32; /* 32 bit code segment */
int ss32; /* 32 bit stack segment */
int cc_op; /* current CC operation */
int addseg; /* non zero if either DS/ES/SS have a non zero base */
int f_st; /* currently unused */
int vm86; /* vm86 mode */
int cpl;
int iopl;
} DisasContext;
/* i386 arith/logic operations */
enum {
OP_ADDL,
OP_ORL,
OP_ADCL,
OP_SBBL,
OP_ANDL,
OP_SUBL,
OP_XORL,
OP_CMPL,
};
/* i386 shift ops */
enum {
OP_ROL,
OP_ROR,
OP_RCL,
OP_RCR,
OP_SHL,
OP_SHR,
OP_SHL1, /* undocumented */
OP_SAR = 7,
};
enum {
#define DEF(s, n) INDEX_op_ ## s,
#include "opc-i386.h"
#undef DEF
NB_OPS,
};
#include "op-i386.h"
/* operand size */
enum {
OT_BYTE = 0,
OT_WORD,
OT_LONG,
OT_QUAD,
};
enum {
/* I386 int registers */
OR_EAX, /* MUST be even numbered */
OR_ECX,
OR_EDX,
OR_EBX,
OR_ESP,
OR_EBP,
OR_ESI,
OR_EDI,
OR_TMP0, /* temporary operand register */
OR_TMP1,
OR_A0, /* temporary register used when doing address evaluation */
OR_ZERO, /* fixed zero register */
NB_OREGS,
};
typedef void (GenOpFunc)(void);
typedef void (GenOpFunc1)(long);
typedef void (GenOpFunc2)(long, long);
static GenOpFunc *gen_op_mov_reg_T0[3][8] = {
[OT_BYTE] = {
gen_op_movb_EAX_T0,
gen_op_movb_ECX_T0,
gen_op_movb_EDX_T0,
gen_op_movb_EBX_T0,
gen_op_movh_EAX_T0,
gen_op_movh_ECX_T0,
gen_op_movh_EDX_T0,
gen_op_movh_EBX_T0,
},
[OT_WORD] = {
gen_op_movw_EAX_T0,
gen_op_movw_ECX_T0,
gen_op_movw_EDX_T0,
gen_op_movw_EBX_T0,
gen_op_movw_ESP_T0,
gen_op_movw_EBP_T0,
gen_op_movw_ESI_T0,
gen_op_movw_EDI_T0,
},
[OT_LONG] = {
gen_op_movl_EAX_T0,
gen_op_movl_ECX_T0,
gen_op_movl_EDX_T0,
gen_op_movl_EBX_T0,
gen_op_movl_ESP_T0,
gen_op_movl_EBP_T0,
gen_op_movl_ESI_T0,
gen_op_movl_EDI_T0,
},
};
static GenOpFunc *gen_op_mov_reg_T1[3][8] = {
[OT_BYTE] = {
gen_op_movb_EAX_T1,
gen_op_movb_ECX_T1,
gen_op_movb_EDX_T1,
gen_op_movb_EBX_T1,
gen_op_movh_EAX_T1,
gen_op_movh_ECX_T1,
gen_op_movh_EDX_T1,
gen_op_movh_EBX_T1,
},
[OT_WORD] = {
gen_op_movw_EAX_T1,
gen_op_movw_ECX_T1,
gen_op_movw_EDX_T1,
gen_op_movw_EBX_T1,
gen_op_movw_ESP_T1,
gen_op_movw_EBP_T1,
gen_op_movw_ESI_T1,
gen_op_movw_EDI_T1,
},
[OT_LONG] = {
gen_op_movl_EAX_T1,
gen_op_movl_ECX_T1,
gen_op_movl_EDX_T1,
gen_op_movl_EBX_T1,
gen_op_movl_ESP_T1,
gen_op_movl_EBP_T1,
gen_op_movl_ESI_T1,
gen_op_movl_EDI_T1,
},
};
static GenOpFunc *gen_op_mov_reg_A0[2][8] = {
[0] = {
gen_op_movw_EAX_A0,
gen_op_movw_ECX_A0,
gen_op_movw_EDX_A0,
gen_op_movw_EBX_A0,
gen_op_movw_ESP_A0,
gen_op_movw_EBP_A0,
gen_op_movw_ESI_A0,
gen_op_movw_EDI_A0,
},
[1] = {
gen_op_movl_EAX_A0,
gen_op_movl_ECX_A0,
gen_op_movl_EDX_A0,
gen_op_movl_EBX_A0,
gen_op_movl_ESP_A0,
gen_op_movl_EBP_A0,
gen_op_movl_ESI_A0,
gen_op_movl_EDI_A0,
},
};
static GenOpFunc *gen_op_mov_TN_reg[3][2][8] =
{
[OT_BYTE] = {
{
gen_op_movl_T0_EAX,
gen_op_movl_T0_ECX,
gen_op_movl_T0_EDX,
gen_op_movl_T0_EBX,
gen_op_movh_T0_EAX,
gen_op_movh_T0_ECX,
gen_op_movh_T0_EDX,
gen_op_movh_T0_EBX,
},
{
gen_op_movl_T1_EAX,
gen_op_movl_T1_ECX,
gen_op_movl_T1_EDX,
gen_op_movl_T1_EBX,
gen_op_movh_T1_EAX,
gen_op_movh_T1_ECX,
gen_op_movh_T1_EDX,
gen_op_movh_T1_EBX,
},
},
[OT_WORD] = {
{
gen_op_movl_T0_EAX,
gen_op_movl_T0_ECX,
gen_op_movl_T0_EDX,
gen_op_movl_T0_EBX,
gen_op_movl_T0_ESP,
gen_op_movl_T0_EBP,
gen_op_movl_T0_ESI,
gen_op_movl_T0_EDI,
},
{
gen_op_movl_T1_EAX,
gen_op_movl_T1_ECX,
gen_op_movl_T1_EDX,
gen_op_movl_T1_EBX,
gen_op_movl_T1_ESP,
gen_op_movl_T1_EBP,
gen_op_movl_T1_ESI,
gen_op_movl_T1_EDI,
},
},
[OT_LONG] = {
{
gen_op_movl_T0_EAX,
gen_op_movl_T0_ECX,
gen_op_movl_T0_EDX,
gen_op_movl_T0_EBX,
gen_op_movl_T0_ESP,
gen_op_movl_T0_EBP,
gen_op_movl_T0_ESI,
gen_op_movl_T0_EDI,
},
{
gen_op_movl_T1_EAX,
gen_op_movl_T1_ECX,
gen_op_movl_T1_EDX,
gen_op_movl_T1_EBX,
gen_op_movl_T1_ESP,
gen_op_movl_T1_EBP,
gen_op_movl_T1_ESI,
gen_op_movl_T1_EDI,
},
},
};
static GenOpFunc *gen_op_movl_A0_reg[8] = {
gen_op_movl_A0_EAX,
gen_op_movl_A0_ECX,
gen_op_movl_A0_EDX,
gen_op_movl_A0_EBX,
gen_op_movl_A0_ESP,
gen_op_movl_A0_EBP,
gen_op_movl_A0_ESI,
gen_op_movl_A0_EDI,
};
static GenOpFunc *gen_op_addl_A0_reg_sN[4][8] = {
[0] = {
gen_op_addl_A0_EAX,
gen_op_addl_A0_ECX,
gen_op_addl_A0_EDX,
gen_op_addl_A0_EBX,
gen_op_addl_A0_ESP,
gen_op_addl_A0_EBP,
gen_op_addl_A0_ESI,
gen_op_addl_A0_EDI,
},
[1] = {
gen_op_addl_A0_EAX_s1,
gen_op_addl_A0_ECX_s1,
gen_op_addl_A0_EDX_s1,
gen_op_addl_A0_EBX_s1,
gen_op_addl_A0_ESP_s1,
gen_op_addl_A0_EBP_s1,
gen_op_addl_A0_ESI_s1,
gen_op_addl_A0_EDI_s1,
},
[2] = {
gen_op_addl_A0_EAX_s2,
gen_op_addl_A0_ECX_s2,
gen_op_addl_A0_EDX_s2,
gen_op_addl_A0_EBX_s2,
gen_op_addl_A0_ESP_s2,
gen_op_addl_A0_EBP_s2,
gen_op_addl_A0_ESI_s2,
gen_op_addl_A0_EDI_s2,
},
[3] = {
gen_op_addl_A0_EAX_s3,
gen_op_addl_A0_ECX_s3,
gen_op_addl_A0_EDX_s3,
gen_op_addl_A0_EBX_s3,
gen_op_addl_A0_ESP_s3,
gen_op_addl_A0_EBP_s3,
gen_op_addl_A0_ESI_s3,
gen_op_addl_A0_EDI_s3,
},
};
static GenOpFunc *gen_op_cmov_reg_T1_T0[2][8] = {
[0] = {
gen_op_cmovw_EAX_T1_T0,
gen_op_cmovw_ECX_T1_T0,
gen_op_cmovw_EDX_T1_T0,
gen_op_cmovw_EBX_T1_T0,
gen_op_cmovw_ESP_T1_T0,
gen_op_cmovw_EBP_T1_T0,
gen_op_cmovw_ESI_T1_T0,
gen_op_cmovw_EDI_T1_T0,
},
[1] = {
gen_op_cmovl_EAX_T1_T0,
gen_op_cmovl_ECX_T1_T0,
gen_op_cmovl_EDX_T1_T0,
gen_op_cmovl_EBX_T1_T0,
gen_op_cmovl_ESP_T1_T0,
gen_op_cmovl_EBP_T1_T0,
gen_op_cmovl_ESI_T1_T0,
gen_op_cmovl_EDI_T1_T0,
},
};
static GenOpFunc *gen_op_arith_T0_T1_cc[8] = {
gen_op_addl_T0_T1_cc,
gen_op_orl_T0_T1_cc,
NULL,
NULL,
gen_op_andl_T0_T1_cc,
gen_op_subl_T0_T1_cc,
gen_op_xorl_T0_T1_cc,
gen_op_cmpl_T0_T1_cc,
};
static GenOpFunc *gen_op_arithc_T0_T1_cc[3][2] = {
[OT_BYTE] = {
gen_op_adcb_T0_T1_cc,
gen_op_sbbb_T0_T1_cc,
},
[OT_WORD] = {
gen_op_adcw_T0_T1_cc,
gen_op_sbbw_T0_T1_cc,
},
[OT_LONG] = {
gen_op_adcl_T0_T1_cc,
gen_op_sbbl_T0_T1_cc,
},
};
static const int cc_op_arithb[8] = {
CC_OP_ADDB,
CC_OP_LOGICB,
CC_OP_ADDB,
CC_OP_SUBB,
CC_OP_LOGICB,
CC_OP_SUBB,
CC_OP_LOGICB,
CC_OP_SUBB,
};
static GenOpFunc *gen_op_cmpxchg_T0_T1_EAX_cc[3] = {
gen_op_cmpxchgb_T0_T1_EAX_cc,
gen_op_cmpxchgw_T0_T1_EAX_cc,
gen_op_cmpxchgl_T0_T1_EAX_cc,
};
static GenOpFunc *gen_op_shift_T0_T1_cc[3][8] = {
[OT_BYTE] = {
gen_op_rolb_T0_T1_cc,
gen_op_rorb_T0_T1_cc,
gen_op_rclb_T0_T1_cc,
gen_op_rcrb_T0_T1_cc,
gen_op_shlb_T0_T1_cc,
gen_op_shrb_T0_T1_cc,
gen_op_shlb_T0_T1_cc,
gen_op_sarb_T0_T1_cc,
},
[OT_WORD] = {
gen_op_rolw_T0_T1_cc,
gen_op_rorw_T0_T1_cc,
gen_op_rclw_T0_T1_cc,
gen_op_rcrw_T0_T1_cc,
gen_op_shlw_T0_T1_cc,
gen_op_shrw_T0_T1_cc,
gen_op_shlw_T0_T1_cc,
gen_op_sarw_T0_T1_cc,
},
[OT_LONG] = {
gen_op_roll_T0_T1_cc,
gen_op_rorl_T0_T1_cc,
gen_op_rcll_T0_T1_cc,
gen_op_rcrl_T0_T1_cc,
gen_op_shll_T0_T1_cc,
gen_op_shrl_T0_T1_cc,
gen_op_shll_T0_T1_cc,
gen_op_sarl_T0_T1_cc,
},
};
static GenOpFunc1 *gen_op_shiftd_T0_T1_im_cc[2][2] = {
[0] = {
gen_op_shldw_T0_T1_im_cc,
gen_op_shrdw_T0_T1_im_cc,
},
[1] = {
gen_op_shldl_T0_T1_im_cc,
gen_op_shrdl_T0_T1_im_cc,
},
};
static GenOpFunc *gen_op_shiftd_T0_T1_ECX_cc[2][2] = {
[0] = {
gen_op_shldw_T0_T1_ECX_cc,
gen_op_shrdw_T0_T1_ECX_cc,
},
[1] = {
gen_op_shldl_T0_T1_ECX_cc,
gen_op_shrdl_T0_T1_ECX_cc,
},
};
static GenOpFunc *gen_op_btx_T0_T1_cc[2][4] = {
[0] = {
gen_op_btw_T0_T1_cc,
gen_op_btsw_T0_T1_cc,
gen_op_btrw_T0_T1_cc,
gen_op_btcw_T0_T1_cc,
},
[1] = {
gen_op_btl_T0_T1_cc,
gen_op_btsl_T0_T1_cc,
gen_op_btrl_T0_T1_cc,
gen_op_btcl_T0_T1_cc,
},
};
static GenOpFunc *gen_op_bsx_T0_cc[2][2] = {
[0] = {
gen_op_bsfw_T0_cc,
gen_op_bsrw_T0_cc,
},
[1] = {
gen_op_bsfl_T0_cc,
gen_op_bsrl_T0_cc,
},
};
static GenOpFunc *gen_op_lds_T0_A0[3] = {
gen_op_ldsb_T0_A0,
gen_op_ldsw_T0_A0,
};
static GenOpFunc *gen_op_ldu_T0_A0[3] = {
gen_op_ldub_T0_A0,
gen_op_lduw_T0_A0,
};
/* sign does not matter */
static GenOpFunc *gen_op_ld_T0_A0[3] = {
gen_op_ldub_T0_A0,
gen_op_lduw_T0_A0,
gen_op_ldl_T0_A0,
};
static GenOpFunc *gen_op_ld_T1_A0[3] = {
gen_op_ldub_T1_A0,
gen_op_lduw_T1_A0,
gen_op_ldl_T1_A0,
};
static GenOpFunc *gen_op_st_T0_A0[3] = {
gen_op_stb_T0_A0,
gen_op_stw_T0_A0,
gen_op_stl_T0_A0,
};
/* the _a32 and _a16 string operations use A0 as the base register. */
#define STRINGOP(x) \
gen_op_ ## x ## b_fast, \
gen_op_ ## x ## w_fast, \
gen_op_ ## x ## l_fast, \
gen_op_ ## x ## b_a32, \
gen_op_ ## x ## w_a32, \
gen_op_ ## x ## l_a32, \
gen_op_ ## x ## b_a16, \
gen_op_ ## x ## w_a16, \
gen_op_ ## x ## l_a16,
static GenOpFunc *gen_op_movs[9 * 2] = {
STRINGOP(movs)
STRINGOP(rep_movs)
};
static GenOpFunc *gen_op_stos[9 * 2] = {
STRINGOP(stos)
STRINGOP(rep_stos)
};
static GenOpFunc *gen_op_lods[9 * 2] = {
STRINGOP(lods)
STRINGOP(rep_lods)
};
static GenOpFunc *gen_op_scas[9 * 3] = {
STRINGOP(scas)
STRINGOP(repz_scas)
STRINGOP(repnz_scas)
};
static GenOpFunc *gen_op_cmps[9 * 3] = {
STRINGOP(cmps)
STRINGOP(repz_cmps)
STRINGOP(repnz_cmps)
};
static GenOpFunc *gen_op_ins[9 * 2] = {
STRINGOP(ins)
STRINGOP(rep_ins)
};
static GenOpFunc *gen_op_outs[9 * 2] = {
STRINGOP(outs)
STRINGOP(rep_outs)
};
static inline void gen_string_ds(DisasContext *s, int ot, GenOpFunc **func)
{
int index, override;
override = s->override;
if (s->aflag) {
/* 32 bit address */
if (s->addseg && override < 0)
override = R_DS;
if (override >= 0) {
gen_op_movl_A0_seg(offsetof(CPUX86State,seg_cache[override].base));
index = 3 + ot;
} else {
index = ot;
}
} else {
if (override < 0)
override = R_DS;
gen_op_movl_A0_seg(offsetof(CPUX86State,seg_cache[override].base));
/* 16 address, always override */
index = 6 + ot;
}
func[index]();
}
static inline void gen_string_es(DisasContext *s, int ot, GenOpFunc **func)
{
int index;
if (s->aflag) {
if (s->addseg) {
index = 3 + ot;
} else {
index = ot;
}
} else {
index = 6 + ot;
}
func[index]();
}
static GenOpFunc *gen_op_in[3] = {
gen_op_inb_T0_T1,
gen_op_inw_T0_T1,
gen_op_inl_T0_T1,
};
static GenOpFunc *gen_op_out[3] = {
gen_op_outb_T0_T1,
gen_op_outw_T0_T1,
gen_op_outl_T0_T1,
};
enum {
JCC_O,
JCC_B,
JCC_Z,
JCC_BE,
JCC_S,
JCC_P,
JCC_L,
JCC_LE,
};
static GenOpFunc2 *gen_jcc_slow[8] = {
gen_op_jo_cc,
gen_op_jb_cc,
gen_op_jz_cc,
gen_op_jbe_cc,
gen_op_js_cc,
gen_op_jp_cc,
gen_op_jl_cc,
gen_op_jle_cc,
};
static GenOpFunc2 *gen_jcc_sub[3][8] = {
[OT_BYTE] = {
NULL,
gen_op_jb_subb,
gen_op_jz_subb,
gen_op_jbe_subb,
gen_op_js_subb,
NULL,
gen_op_jl_subb,
gen_op_jle_subb,
},
[OT_WORD] = {
NULL,
gen_op_jb_subw,
gen_op_jz_subw,
gen_op_jbe_subw,
gen_op_js_subw,
NULL,
gen_op_jl_subw,
gen_op_jle_subw,
},
[OT_LONG] = {
NULL,
gen_op_jb_subl,
gen_op_jz_subl,
gen_op_jbe_subl,
gen_op_js_subl,
NULL,
gen_op_jl_subl,
gen_op_jle_subl,
},
};
static GenOpFunc2 *gen_op_loop[2][4] = {
[0] = {
gen_op_loopnzw,
gen_op_loopzw,
gen_op_loopw,
gen_op_jecxzw,
},
[1] = {
gen_op_loopnzl,
gen_op_loopzl,
gen_op_loopl,
gen_op_jecxzl,
},
};
static GenOpFunc *gen_setcc_slow[8] = {
gen_op_seto_T0_cc,
gen_op_setb_T0_cc,
gen_op_setz_T0_cc,
gen_op_setbe_T0_cc,
gen_op_sets_T0_cc,
gen_op_setp_T0_cc,
gen_op_setl_T0_cc,
gen_op_setle_T0_cc,
};
static GenOpFunc *gen_setcc_sub[3][8] = {
[OT_BYTE] = {
NULL,
gen_op_setb_T0_subb,
gen_op_setz_T0_subb,
gen_op_setbe_T0_subb,
gen_op_sets_T0_subb,
NULL,
gen_op_setl_T0_subb,
gen_op_setle_T0_subb,
},
[OT_WORD] = {
NULL,
gen_op_setb_T0_subw,
gen_op_setz_T0_subw,
gen_op_setbe_T0_subw,
gen_op_sets_T0_subw,
NULL,
gen_op_setl_T0_subw,
gen_op_setle_T0_subw,
},
[OT_LONG] = {
NULL,
gen_op_setb_T0_subl,
gen_op_setz_T0_subl,
gen_op_setbe_T0_subl,
gen_op_sets_T0_subl,
NULL,
gen_op_setl_T0_subl,
gen_op_setle_T0_subl,
},
};
static GenOpFunc *gen_op_fp_arith_ST0_FT0[8] = {
gen_op_fadd_ST0_FT0,
gen_op_fmul_ST0_FT0,
gen_op_fcom_ST0_FT0,
gen_op_fcom_ST0_FT0,
gen_op_fsub_ST0_FT0,
gen_op_fsubr_ST0_FT0,
gen_op_fdiv_ST0_FT0,
gen_op_fdivr_ST0_FT0,
};
/* NOTE the exception in "r" op ordering */
static GenOpFunc1 *gen_op_fp_arith_STN_ST0[8] = {
gen_op_fadd_STN_ST0,
gen_op_fmul_STN_ST0,
NULL,
NULL,
gen_op_fsubr_STN_ST0,
gen_op_fsub_STN_ST0,
gen_op_fdivr_STN_ST0,
gen_op_fdiv_STN_ST0,
};
static void gen_op(DisasContext *s1, int op, int ot, int d, int s)
{
if (d != OR_TMP0)
gen_op_mov_TN_reg[ot][0][d]();
if (s != OR_TMP1)
gen_op_mov_TN_reg[ot][1][s]();
if (op == OP_ADCL || op == OP_SBBL) {
if (s1->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s1->cc_op);
gen_op_arithc_T0_T1_cc[ot][op - OP_ADCL]();
s1->cc_op = CC_OP_DYNAMIC;
} else {
gen_op_arith_T0_T1_cc[op]();
s1->cc_op = cc_op_arithb[op] + ot;
}
if (d != OR_TMP0 && op != OP_CMPL)
gen_op_mov_reg_T0[ot][d]();
}
static void gen_opi(DisasContext *s1, int op, int ot, int d, int c)
{
gen_op_movl_T1_im(c);
gen_op(s1, op, ot, d, OR_TMP1);
}
static void gen_inc(DisasContext *s1, int ot, int d, int c)
{
if (d != OR_TMP0)
gen_op_mov_TN_reg[ot][0][d]();
if (s1->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s1->cc_op);
if (c > 0) {
gen_op_incl_T0_cc();
s1->cc_op = CC_OP_INCB + ot;
} else {
gen_op_decl_T0_cc();
s1->cc_op = CC_OP_DECB + ot;
}
if (d != OR_TMP0)
gen_op_mov_reg_T0[ot][d]();
}
static void gen_shift(DisasContext *s1, int op, int ot, int d, int s)
{
if (d != OR_TMP0)
gen_op_mov_TN_reg[ot][0][d]();
if (s != OR_TMP1)
gen_op_mov_TN_reg[ot][1][s]();
/* for zero counts, flags are not updated, so must do it dynamically */
if (s1->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s1->cc_op);
gen_op_shift_T0_T1_cc[ot][op]();
if (d != OR_TMP0)
gen_op_mov_reg_T0[ot][d]();
s1->cc_op = CC_OP_DYNAMIC; /* cannot predict flags after */
}
static void gen_shifti(DisasContext *s1, int op, int ot, int d, int c)
{
/* currently not optimized */
gen_op_movl_T1_im(c);
gen_shift(s1, op, ot, d, OR_TMP1);
}
static void gen_lea_modrm(DisasContext *s, int modrm, int *reg_ptr, int *offset_ptr)
{
int havesib;
int base, disp;
int index;
int scale;
int opreg;
int mod, rm, code, override, must_add_seg;
override = s->override;
must_add_seg = s->addseg;
if (override >= 0)
must_add_seg = 1;
mod = (modrm >> 6) & 3;
rm = modrm & 7;
if (s->aflag) {
havesib = 0;
base = rm;
index = 0;
scale = 0;
if (base == 4) {
havesib = 1;
code = ldub(s->pc++);
scale = (code >> 6) & 3;
index = (code >> 3) & 7;
base = code & 7;
}
switch (mod) {
case 0:
if (base == 5) {
base = -1;
disp = ldl(s->pc);
s->pc += 4;
} else {
disp = 0;
}
break;
case 1:
disp = (int8_t)ldub(s->pc++);
break;
default:
case 2:
disp = ldl(s->pc);
s->pc += 4;
break;
}
if (base >= 0) {
gen_op_movl_A0_reg[base]();
if (disp != 0)
gen_op_addl_A0_im(disp);
} else {
gen_op_movl_A0_im(disp);
}
if (havesib && (index != 4 || scale != 0)) {
gen_op_addl_A0_reg_sN[scale][index]();
}
if (must_add_seg) {
if (override < 0) {
if (base == R_EBP || base == R_ESP)
override = R_SS;
else
override = R_DS;
}
gen_op_addl_A0_seg(offsetof(CPUX86State,seg_cache[override].base));
}
} else {
switch (mod) {
case 0:
if (rm == 6) {
disp = lduw(s->pc);
s->pc += 2;
gen_op_movl_A0_im(disp);
rm = 0; /* avoid SS override */
goto no_rm;
} else {
disp = 0;
}
break;
case 1:
disp = (int8_t)ldub(s->pc++);
break;
default:
case 2:
disp = lduw(s->pc);
s->pc += 2;
break;
}
switch(rm) {
case 0:
gen_op_movl_A0_reg[R_EBX]();
gen_op_addl_A0_reg_sN[0][R_ESI]();
break;
case 1:
gen_op_movl_A0_reg[R_EBX]();
gen_op_addl_A0_reg_sN[0][R_EDI]();
break;
case 2:
gen_op_movl_A0_reg[R_EBP]();
gen_op_addl_A0_reg_sN[0][R_ESI]();
break;
case 3:
gen_op_movl_A0_reg[R_EBP]();
gen_op_addl_A0_reg_sN[0][R_EDI]();
break;
case 4:
gen_op_movl_A0_reg[R_ESI]();
break;
case 5:
gen_op_movl_A0_reg[R_EDI]();
break;
case 6:
gen_op_movl_A0_reg[R_EBP]();
break;
default:
case 7:
gen_op_movl_A0_reg[R_EBX]();
break;
}
if (disp != 0)
gen_op_addl_A0_im(disp);
gen_op_andl_A0_ffff();
no_rm:
if (must_add_seg) {
if (override < 0) {
if (rm == 2 || rm == 3 || rm == 6)
override = R_SS;
else
override = R_DS;
}
gen_op_addl_A0_seg(offsetof(CPUX86State,seg_cache[override].base));
}
}
opreg = OR_A0;
disp = 0;
*reg_ptr = opreg;
*offset_ptr = disp;
}
/* generate modrm memory load or store of 'reg'. TMP0 is used if reg !=
OR_TMP0 */
static void gen_ldst_modrm(DisasContext *s, int modrm, int ot, int reg, int is_store)
{
int mod, rm, opreg, disp;
mod = (modrm >> 6) & 3;
rm = modrm & 7;
if (mod == 3) {
if (is_store) {
if (reg != OR_TMP0)
gen_op_mov_TN_reg[ot][0][reg]();
gen_op_mov_reg_T0[ot][rm]();
} else {
gen_op_mov_TN_reg[ot][0][rm]();
if (reg != OR_TMP0)
gen_op_mov_reg_T0[ot][reg]();
}
} else {
gen_lea_modrm(s, modrm, &opreg, &disp);
if (is_store) {
if (reg != OR_TMP0)
gen_op_mov_TN_reg[ot][0][reg]();
gen_op_st_T0_A0[ot]();
} else {
gen_op_ld_T0_A0[ot]();
if (reg != OR_TMP0)
gen_op_mov_reg_T0[ot][reg]();
}
}
}
static inline uint32_t insn_get(DisasContext *s, int ot)
{
uint32_t ret;
switch(ot) {
case OT_BYTE:
ret = ldub(s->pc);
s->pc++;
break;
case OT_WORD:
ret = lduw(s->pc);
s->pc += 2;
break;
default:
case OT_LONG:
ret = ldl(s->pc);
s->pc += 4;
break;
}
return ret;
}
static inline void gen_jcc(DisasContext *s, int b, int val, int next_eip)
{
int inv, jcc_op;
GenOpFunc2 *func;
inv = b & 1;
jcc_op = (b >> 1) & 7;
switch(s->cc_op) {
/* we optimize the cmp/jcc case */
case CC_OP_SUBB:
case CC_OP_SUBW:
case CC_OP_SUBL:
func = gen_jcc_sub[s->cc_op - CC_OP_SUBB][jcc_op];
if (!func)
goto slow_jcc;
break;
/* some jumps are easy to compute */
case CC_OP_ADDB:
case CC_OP_ADDW:
case CC_OP_ADDL:
case CC_OP_ADCB:
case CC_OP_ADCW:
case CC_OP_ADCL:
case CC_OP_SBBB:
case CC_OP_SBBW:
case CC_OP_SBBL:
case CC_OP_LOGICB:
case CC_OP_LOGICW:
case CC_OP_LOGICL:
case CC_OP_INCB:
case CC_OP_INCW:
case CC_OP_INCL:
case CC_OP_DECB:
case CC_OP_DECW:
case CC_OP_DECL:
case CC_OP_SHLB:
case CC_OP_SHLW:
case CC_OP_SHLL:
case CC_OP_SARB:
case CC_OP_SARW:
case CC_OP_SARL:
switch(jcc_op) {
case JCC_Z:
func = gen_jcc_sub[(s->cc_op - CC_OP_ADDB) % 3][jcc_op];
break;
case JCC_S:
func = gen_jcc_sub[(s->cc_op - CC_OP_ADDB) % 3][jcc_op];
break;
default:
goto slow_jcc;
}
break;
default:
slow_jcc:
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
func = gen_jcc_slow[jcc_op];
break;
}
if (!inv) {
func(val, next_eip);
} else {
func(next_eip, val);
}
}
static void gen_setcc(DisasContext *s, int b)
{
int inv, jcc_op;
GenOpFunc *func;
inv = b & 1;
jcc_op = (b >> 1) & 7;
switch(s->cc_op) {
/* we optimize the cmp/jcc case */
case CC_OP_SUBB:
case CC_OP_SUBW:
case CC_OP_SUBL:
func = gen_setcc_sub[s->cc_op - CC_OP_SUBB][jcc_op];
if (!func)
goto slow_jcc;
break;
/* some jumps are easy to compute */
case CC_OP_ADDB:
case CC_OP_ADDW:
case CC_OP_ADDL:
case CC_OP_LOGICB:
case CC_OP_LOGICW:
case CC_OP_LOGICL:
case CC_OP_INCB:
case CC_OP_INCW:
case CC_OP_INCL:
case CC_OP_DECB:
case CC_OP_DECW:
case CC_OP_DECL:
case CC_OP_SHLB:
case CC_OP_SHLW:
case CC_OP_SHLL:
switch(jcc_op) {
case JCC_Z:
func = gen_setcc_sub[(s->cc_op - CC_OP_ADDB) % 3][jcc_op];
break;
case JCC_S:
func = gen_setcc_sub[(s->cc_op - CC_OP_ADDB) % 3][jcc_op];
break;
default:
goto slow_jcc;
}
break;
default:
slow_jcc:
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
func = gen_setcc_slow[jcc_op];
break;
}
func();
if (inv) {
gen_op_xor_T0_1();
}
}
/* move T0 to seg_reg and compute if the CPU state may change */
static void gen_movl_seg_T0(DisasContext *s, int seg_reg)
{
gen_op_movl_seg_T0(seg_reg);
if (!s->addseg && seg_reg < R_FS)
s->is_jmp = 2; /* abort translation because the register may
have a non zero base */
}
/* generate a push. It depends on ss32, addseg and dflag */
static void gen_push_T0(DisasContext *s)
{
if (s->ss32) {
if (!s->addseg) {
if (s->dflag)
gen_op_pushl_T0();
else
gen_op_pushw_T0();
} else {
if (s->dflag)
gen_op_pushl_ss32_T0();
else
gen_op_pushw_ss32_T0();
}
} else {
if (s->dflag)
gen_op_pushl_ss16_T0();
else
gen_op_pushw_ss16_T0();
}
}
/* two step pop is necessary for precise exceptions */
static void gen_pop_T0(DisasContext *s)
{
if (s->ss32) {
if (!s->addseg) {
if (s->dflag)
gen_op_popl_T0();
else
gen_op_popw_T0();
} else {
if (s->dflag)
gen_op_popl_ss32_T0();
else
gen_op_popw_ss32_T0();
}
} else {
if (s->dflag)
gen_op_popl_ss16_T0();
else
gen_op_popw_ss16_T0();
}
}
static void gen_pop_update(DisasContext *s)
{
if (s->ss32) {
if (s->dflag)
gen_op_addl_ESP_4();
else
gen_op_addl_ESP_2();
} else {
if (s->dflag)
gen_op_addw_ESP_4();
else
gen_op_addw_ESP_2();
}
}
/* NOTE: wrap around in 16 bit not fully handled */
static void gen_pusha(DisasContext *s)
{
int i;
gen_op_movl_A0_ESP();
gen_op_addl_A0_im(-16 << s->dflag);
if (!s->ss32)
gen_op_andl_A0_ffff();
gen_op_movl_T1_A0();
if (s->addseg)
gen_op_addl_A0_seg(offsetof(CPUX86State,seg_cache[R_SS].base));
for(i = 0;i < 8; i++) {
gen_op_mov_TN_reg[OT_LONG][0][7 - i]();
gen_op_st_T0_A0[OT_WORD + s->dflag]();
gen_op_addl_A0_im(2 << s->dflag);
}
gen_op_mov_reg_T1[OT_WORD + s->dflag][R_ESP]();
}
/* NOTE: wrap around in 16 bit not fully handled */
static void gen_popa(DisasContext *s)
{
int i;
gen_op_movl_A0_ESP();
if (!s->ss32)
gen_op_andl_A0_ffff();
gen_op_movl_T1_A0();
gen_op_addl_T1_im(16 << s->dflag);
if (s->addseg)
gen_op_addl_A0_seg(offsetof(CPUX86State,seg_cache[R_SS].base));
for(i = 0;i < 8; i++) {
/* ESP is not reloaded */
if (i != 3) {
gen_op_ld_T0_A0[OT_WORD + s->dflag]();
gen_op_mov_reg_T0[OT_WORD + s->dflag][7 - i]();
}
gen_op_addl_A0_im(2 << s->dflag);
}
gen_op_mov_reg_T1[OT_WORD + s->dflag][R_ESP]();
}
/* NOTE: wrap around in 16 bit not fully handled */
/* XXX: check this */
static void gen_enter(DisasContext *s, int esp_addend, int level)
{
int ot, level1, addend, opsize;
ot = s->dflag + OT_WORD;
level &= 0x1f;
level1 = level;
opsize = 2 << s->dflag;
gen_op_movl_A0_ESP();
gen_op_addl_A0_im(-opsize);
if (!s->ss32)
gen_op_andl_A0_ffff();
gen_op_movl_T1_A0();
if (s->addseg)
gen_op_addl_A0_seg(offsetof(CPUX86State,seg_cache[R_SS].base));
/* push bp */
gen_op_mov_TN_reg[OT_LONG][0][R_EBP]();
gen_op_st_T0_A0[ot]();
if (level) {
while (level--) {
gen_op_addl_A0_im(-opsize);
gen_op_addl_T0_im(-opsize);
gen_op_st_T0_A0[ot]();
}
gen_op_addl_A0_im(-opsize);
/* XXX: add st_T1_A0 ? */
gen_op_movl_T0_T1();
gen_op_st_T0_A0[ot]();
}
gen_op_mov_reg_T1[ot][R_EBP]();
addend = -esp_addend;
if (level1)
addend -= opsize * (level1 + 1);
gen_op_addl_T1_im(addend);
gen_op_mov_reg_T1[ot][R_ESP]();
}
/* return the next pc address. Return -1 if no insn found. *is_jmp_ptr
is set to true if the instruction sets the PC (last instruction of
a basic block) */
long disas_insn(DisasContext *s, uint8_t *pc_start)
{
int b, prefixes, aflag, dflag;
int shift, ot;
int modrm, reg, rm, mod, reg_addr, op, opreg, offset_addr, val;
unsigned int next_eip;
s->pc = pc_start;
prefixes = 0;
aflag = s->code32;
dflag = s->code32;
s->override = -1;
next_byte:
b = ldub(s->pc);
s->pc++;
/* check prefixes */
switch (b) {
case 0xf3:
prefixes |= PREFIX_REPZ;
goto next_byte;
case 0xf2:
prefixes |= PREFIX_REPNZ;
goto next_byte;
case 0xf0:
prefixes |= PREFIX_LOCK;
goto next_byte;
case 0x2e:
s->override = R_CS;
goto next_byte;
case 0x36:
s->override = R_SS;
goto next_byte;
case 0x3e:
s->override = R_DS;
goto next_byte;
case 0x26:
s->override = R_ES;
goto next_byte;
case 0x64:
s->override = R_FS;
goto next_byte;
case 0x65:
s->override = R_GS;
goto next_byte;
case 0x66:
prefixes |= PREFIX_DATA;
goto next_byte;
case 0x67:
prefixes |= PREFIX_ADR;
goto next_byte;
case 0x9b:
prefixes |= PREFIX_FWAIT;
goto next_byte;
}
if (prefixes & PREFIX_DATA)
dflag ^= 1;
if (prefixes & PREFIX_ADR)
aflag ^= 1;
s->prefix = prefixes;
s->aflag = aflag;
s->dflag = dflag;
/* lock generation */
if (prefixes & PREFIX_LOCK)
gen_op_lock();
/* now check op code */
reswitch:
switch(b) {
case 0x0f:
/**************************/
/* extended op code */
b = ldub(s->pc++) | 0x100;
goto reswitch;
/**************************/
/* arith & logic */
case 0x00 ... 0x05:
case 0x08 ... 0x0d:
case 0x10 ... 0x15:
case 0x18 ... 0x1d:
case 0x20 ... 0x25:
case 0x28 ... 0x2d:
case 0x30 ... 0x35:
case 0x38 ... 0x3d:
{
int op, f, val;
op = (b >> 3) & 7;
f = (b >> 1) & 3;
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
switch(f) {
case 0: /* OP Ev, Gv */
modrm = ldub(s->pc++);
reg = ((modrm >> 3) & 7) + OR_EAX;
mod = (modrm >> 6) & 3;
rm = modrm & 7;
if (mod != 3) {
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
gen_op_ld_T0_A0[ot]();
opreg = OR_TMP0;
} else {
opreg = OR_EAX + rm;
}
gen_op(s, op, ot, opreg, reg);
if (mod != 3 && op != 7) {
gen_op_st_T0_A0[ot]();
}
break;
case 1: /* OP Gv, Ev */
modrm = ldub(s->pc++);
mod = (modrm >> 6) & 3;
reg = ((modrm >> 3) & 7) + OR_EAX;
rm = modrm & 7;
if (mod != 3) {
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
gen_op_ld_T1_A0[ot]();
opreg = OR_TMP1;
} else {
opreg = OR_EAX + rm;
}
gen_op(s, op, ot, reg, opreg);
break;
case 2: /* OP A, Iv */
val = insn_get(s, ot);
gen_opi(s, op, ot, OR_EAX, val);
break;
}
}
break;
case 0x80: /* GRP1 */
case 0x81:
case 0x83:
{
int val;
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
mod = (modrm >> 6) & 3;
rm = modrm & 7;
op = (modrm >> 3) & 7;
if (mod != 3) {
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
gen_op_ld_T0_A0[ot]();
opreg = OR_TMP0;
} else {
opreg = rm + OR_EAX;
}
switch(b) {
default:
case 0x80:
case 0x81:
val = insn_get(s, ot);
break;
case 0x83:
val = (int8_t)insn_get(s, OT_BYTE);
break;
}
gen_opi(s, op, ot, opreg, val);
if (op != 7 && mod != 3) {
gen_op_st_T0_A0[ot]();
}
}
break;
/**************************/
/* inc, dec, and other misc arith */
case 0x40 ... 0x47: /* inc Gv */
ot = dflag ? OT_LONG : OT_WORD;
gen_inc(s, ot, OR_EAX + (b & 7), 1);
break;
case 0x48 ... 0x4f: /* dec Gv */
ot = dflag ? OT_LONG : OT_WORD;
gen_inc(s, ot, OR_EAX + (b & 7), -1);
break;
case 0xf6: /* GRP3 */
case 0xf7:
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
mod = (modrm >> 6) & 3;
rm = modrm & 7;
op = (modrm >> 3) & 7;
if (mod != 3) {
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
gen_op_ld_T0_A0[ot]();
} else {
gen_op_mov_TN_reg[ot][0][rm]();
}
switch(op) {
case 0: /* test */
val = insn_get(s, ot);
gen_op_movl_T1_im(val);
gen_op_testl_T0_T1_cc();
s->cc_op = CC_OP_LOGICB + ot;
break;
case 2: /* not */
gen_op_notl_T0();
if (mod != 3) {
gen_op_st_T0_A0[ot]();
} else {
gen_op_mov_reg_T0[ot][rm]();
}
break;
case 3: /* neg */
gen_op_negl_T0_cc();
if (mod != 3) {
gen_op_st_T0_A0[ot]();
} else {
gen_op_mov_reg_T0[ot][rm]();
}
s->cc_op = CC_OP_SUBB + ot;
break;
case 4: /* mul */
switch(ot) {
case OT_BYTE:
gen_op_mulb_AL_T0();
break;
case OT_WORD:
gen_op_mulw_AX_T0();
break;
default:
case OT_LONG:
gen_op_mull_EAX_T0();
break;
}
s->cc_op = CC_OP_MUL;
break;
case 5: /* imul */
switch(ot) {
case OT_BYTE:
gen_op_imulb_AL_T0();
break;
case OT_WORD:
gen_op_imulw_AX_T0();
break;
default:
case OT_LONG:
gen_op_imull_EAX_T0();
break;
}
s->cc_op = CC_OP_MUL;
break;
case 6: /* div */
switch(ot) {
case OT_BYTE:
gen_op_divb_AL_T0();
break;
case OT_WORD:
gen_op_divw_AX_T0();
break;
default:
case OT_LONG:
gen_op_divl_EAX_T0();
break;
}
break;
case 7: /* idiv */
switch(ot) {
case OT_BYTE:
gen_op_idivb_AL_T0();
break;
case OT_WORD:
gen_op_idivw_AX_T0();
break;
default:
case OT_LONG:
gen_op_idivl_EAX_T0();
break;
}
break;
default:
goto illegal_op;
}
break;
case 0xfe: /* GRP4 */
case 0xff: /* GRP5 */
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
mod = (modrm >> 6) & 3;
rm = modrm & 7;
op = (modrm >> 3) & 7;
if (op >= 2 && b == 0xfe) {
goto illegal_op;
}
if (mod != 3) {
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
if (op != 3 && op != 5)
gen_op_ld_T0_A0[ot]();
} else {
gen_op_mov_TN_reg[ot][0][rm]();
}
switch(op) {
case 0: /* inc Ev */
gen_inc(s, ot, OR_TMP0, 1);
if (mod != 3)
gen_op_st_T0_A0[ot]();
else
gen_op_mov_reg_T0[ot][rm]();
break;
case 1: /* dec Ev */
gen_inc(s, ot, OR_TMP0, -1);
if (mod != 3)
gen_op_st_T0_A0[ot]();
else
gen_op_mov_reg_T0[ot][rm]();
break;
case 2: /* call Ev */
/* XXX: optimize if memory (no and is necessary) */
if (s->dflag == 0)
gen_op_andl_T0_ffff();
gen_op_jmp_T0();
next_eip = s->pc - s->cs_base;
gen_op_movl_T0_im(next_eip);
gen_push_T0(s);
s->is_jmp = 1;
break;
case 3: /* lcall Ev */
/* push return segment + offset */
gen_op_movl_T0_seg(R_CS);
gen_push_T0(s);
next_eip = s->pc - s->cs_base;
gen_op_movl_T0_im(next_eip);
gen_push_T0(s);
gen_op_ld_T1_A0[ot]();
gen_op_addl_A0_im(1 << (ot - OT_WORD + 1));
gen_op_lduw_T0_A0();
gen_movl_seg_T0(s, R_CS);
gen_op_movl_T0_T1();
gen_op_jmp_T0();
s->is_jmp = 1;
break;
case 4: /* jmp Ev */
if (s->dflag == 0)
gen_op_andl_T0_ffff();
gen_op_jmp_T0();
s->is_jmp = 1;
break;
case 5: /* ljmp Ev */
gen_op_ld_T1_A0[ot]();
gen_op_addl_A0_im(1 << (ot - OT_WORD + 1));
gen_op_lduw_T0_A0();
gen_movl_seg_T0(s, R_CS);
gen_op_movl_T0_T1();
gen_op_jmp_T0();
s->is_jmp = 1;
break;
case 6: /* push Ev */
gen_push_T0(s);
break;
default:
goto illegal_op;
}
break;
case 0x84: /* test Ev, Gv */
case 0x85:
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
mod = (modrm >> 6) & 3;
rm = modrm & 7;
reg = (modrm >> 3) & 7;
gen_ldst_modrm(s, modrm, ot, OR_TMP0, 0);
gen_op_mov_TN_reg[ot][1][reg + OR_EAX]();
gen_op_testl_T0_T1_cc();
s->cc_op = CC_OP_LOGICB + ot;
break;
case 0xa8: /* test eAX, Iv */
case 0xa9:
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
val = insn_get(s, ot);
gen_op_mov_TN_reg[ot][0][OR_EAX]();
gen_op_movl_T1_im(val);
gen_op_testl_T0_T1_cc();
s->cc_op = CC_OP_LOGICB + ot;
break;
case 0x98: /* CWDE/CBW */
if (dflag)
gen_op_movswl_EAX_AX();
else
gen_op_movsbw_AX_AL();
break;
case 0x99: /* CDQ/CWD */
if (dflag)
gen_op_movslq_EDX_EAX();
else
gen_op_movswl_DX_AX();
break;
case 0x1af: /* imul Gv, Ev */
case 0x69: /* imul Gv, Ev, I */
case 0x6b:
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
reg = ((modrm >> 3) & 7) + OR_EAX;
gen_ldst_modrm(s, modrm, ot, OR_TMP0, 0);
if (b == 0x69) {
val = insn_get(s, ot);
gen_op_movl_T1_im(val);
} else if (b == 0x6b) {
val = insn_get(s, OT_BYTE);
gen_op_movl_T1_im(val);
} else {
gen_op_mov_TN_reg[ot][1][reg]();
}
if (ot == OT_LONG) {
gen_op_imull_T0_T1();
} else {
gen_op_imulw_T0_T1();
}
gen_op_mov_reg_T0[ot][reg]();
s->cc_op = CC_OP_MUL;
break;
case 0x1c0:
case 0x1c1: /* xadd Ev, Gv */
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
reg = (modrm >> 3) & 7;
mod = (modrm >> 6) & 3;
if (mod == 3) {
rm = modrm & 7;
gen_op_mov_TN_reg[ot][0][reg]();
gen_op_mov_TN_reg[ot][1][rm]();
gen_op_addl_T0_T1_cc();
gen_op_mov_reg_T0[ot][rm]();
gen_op_mov_reg_T1[ot][reg]();
} else {
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
gen_op_mov_TN_reg[ot][0][reg]();
gen_op_ld_T1_A0[ot]();
gen_op_addl_T0_T1_cc();
gen_op_st_T0_A0[ot]();
gen_op_mov_reg_T1[ot][reg]();
}
s->cc_op = CC_OP_ADDB + ot;
break;
case 0x1b0:
case 0x1b1: /* cmpxchg Ev, Gv */
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
reg = (modrm >> 3) & 7;
mod = (modrm >> 6) & 3;
gen_op_mov_TN_reg[ot][1][reg]();
if (mod == 3) {
rm = modrm & 7;
gen_op_mov_TN_reg[ot][0][rm]();
gen_op_cmpxchg_T0_T1_EAX_cc[ot]();
gen_op_mov_reg_T0[ot][rm]();
} else {
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
gen_op_ld_T0_A0[ot]();
gen_op_cmpxchg_T0_T1_EAX_cc[ot]();
gen_op_st_T0_A0[ot]();
}
s->cc_op = CC_OP_SUBB + ot;
break;
case 0x1c7: /* cmpxchg8b */
modrm = ldub(s->pc++);
mod = (modrm >> 6) & 3;
if (mod == 3)
goto illegal_op;
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
gen_op_cmpxchg8b();
s->cc_op = CC_OP_EFLAGS;
break;
/**************************/
/* push/pop */
case 0x50 ... 0x57: /* push */
gen_op_mov_TN_reg[OT_LONG][0][b & 7]();
gen_push_T0(s);
break;
case 0x58 ... 0x5f: /* pop */
ot = dflag ? OT_LONG : OT_WORD;
gen_pop_T0(s);
gen_op_mov_reg_T0[ot][b & 7]();
gen_pop_update(s);
break;
case 0x60: /* pusha */
gen_pusha(s);
break;
case 0x61: /* popa */
gen_popa(s);
break;
case 0x68: /* push Iv */
case 0x6a:
ot = dflag ? OT_LONG : OT_WORD;
if (b == 0x68)
val = insn_get(s, ot);
else
val = (int8_t)insn_get(s, OT_BYTE);
gen_op_movl_T0_im(val);
gen_push_T0(s);
break;
case 0x8f: /* pop Ev */
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
gen_pop_T0(s);
gen_ldst_modrm(s, modrm, ot, OR_TMP0, 1);
gen_pop_update(s);
break;
case 0xc8: /* enter */
{
int level;
val = lduw(s->pc);
s->pc += 2;
level = ldub(s->pc++);
gen_enter(s, val, level);
}
break;
case 0xc9: /* leave */
/* XXX: exception not precise (ESP is update before potential exception) */
if (s->ss32) {
gen_op_mov_TN_reg[OT_LONG][0][R_EBP]();
gen_op_mov_reg_T0[OT_LONG][R_ESP]();
} else {
gen_op_mov_TN_reg[OT_WORD][0][R_EBP]();
gen_op_mov_reg_T0[OT_WORD][R_ESP]();
}
gen_pop_T0(s);
ot = dflag ? OT_LONG : OT_WORD;
gen_op_mov_reg_T0[ot][R_EBP]();
gen_pop_update(s);
break;
case 0x06: /* push es */
case 0x0e: /* push cs */
case 0x16: /* push ss */
case 0x1e: /* push ds */
gen_op_movl_T0_seg(b >> 3);
gen_push_T0(s);
break;
case 0x1a0: /* push fs */
case 0x1a8: /* push gs */
gen_op_movl_T0_seg((b >> 3) & 7);
gen_push_T0(s);
break;
case 0x07: /* pop es */
case 0x17: /* pop ss */
case 0x1f: /* pop ds */
gen_pop_T0(s);
gen_movl_seg_T0(s, b >> 3);
gen_pop_update(s);
break;
case 0x1a1: /* pop fs */
case 0x1a9: /* pop gs */
gen_pop_T0(s);
gen_movl_seg_T0(s, (b >> 3) & 7);
gen_pop_update(s);
break;
/**************************/
/* mov */
case 0x88:
case 0x89: /* mov Gv, Ev */
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
reg = (modrm >> 3) & 7;
/* generate a generic store */
gen_ldst_modrm(s, modrm, ot, OR_EAX + reg, 1);
break;
case 0xc6:
case 0xc7: /* mov Ev, Iv */
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
mod = (modrm >> 6) & 3;
if (mod != 3)
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
val = insn_get(s, ot);
gen_op_movl_T0_im(val);
if (mod != 3)
gen_op_st_T0_A0[ot]();
else
gen_op_mov_reg_T0[ot][modrm & 7]();
break;
case 0x8a:
case 0x8b: /* mov Ev, Gv */
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
reg = (modrm >> 3) & 7;
gen_ldst_modrm(s, modrm, ot, OR_TMP0, 0);
gen_op_mov_reg_T0[ot][reg]();
break;
case 0x8e: /* mov seg, Gv */
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
reg = (modrm >> 3) & 7;
gen_ldst_modrm(s, modrm, ot, OR_TMP0, 0);
if (reg >= 6 || reg == R_CS)
goto illegal_op;
gen_movl_seg_T0(s, reg);
break;
case 0x8c: /* mov Gv, seg */
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
reg = (modrm >> 3) & 7;
if (reg >= 6)
goto illegal_op;
gen_op_movl_T0_seg(reg);
gen_ldst_modrm(s, modrm, ot, OR_TMP0, 1);
break;
case 0x1b6: /* movzbS Gv, Eb */
case 0x1b7: /* movzwS Gv, Eb */
case 0x1be: /* movsbS Gv, Eb */
case 0x1bf: /* movswS Gv, Eb */
{
int d_ot;
/* d_ot is the size of destination */
d_ot = dflag + OT_WORD;
/* ot is the size of source */
ot = (b & 1) + OT_BYTE;
modrm = ldub(s->pc++);
reg = ((modrm >> 3) & 7) + OR_EAX;
mod = (modrm >> 6) & 3;
rm = modrm & 7;
if (mod == 3) {
gen_op_mov_TN_reg[ot][0][rm]();
switch(ot | (b & 8)) {
case OT_BYTE:
gen_op_movzbl_T0_T0();
break;
case OT_BYTE | 8:
gen_op_movsbl_T0_T0();
break;
case OT_WORD:
gen_op_movzwl_T0_T0();
break;
default:
case OT_WORD | 8:
gen_op_movswl_T0_T0();
break;
}
gen_op_mov_reg_T0[d_ot][reg]();
} else {
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
if (b & 8) {
gen_op_lds_T0_A0[ot]();
} else {
gen_op_ldu_T0_A0[ot]();
}
gen_op_mov_reg_T0[d_ot][reg]();
}
}
break;
case 0x8d: /* lea */
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
reg = (modrm >> 3) & 7;
/* we must ensure that no segment is added */
s->override = -1;
val = s->addseg;
s->addseg = 0;
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
s->addseg = val;
gen_op_mov_reg_A0[ot - OT_WORD][reg]();
break;
case 0xa0: /* mov EAX, Ov */
case 0xa1:
case 0xa2: /* mov Ov, EAX */
case 0xa3:
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
if (s->aflag)
offset_addr = insn_get(s, OT_LONG);
else
offset_addr = insn_get(s, OT_WORD);
gen_op_movl_A0_im(offset_addr);
/* handle override */
{
int override, must_add_seg;
must_add_seg = s->addseg;
if (s->override >= 0) {
override = s->override;
must_add_seg = 1;
} else {
override = R_DS;
}
if (must_add_seg) {
gen_op_addl_A0_seg(offsetof(CPUX86State,seg_cache[override].base));
}
}
if ((b & 2) == 0) {
gen_op_ld_T0_A0[ot]();
gen_op_mov_reg_T0[ot][R_EAX]();
} else {
gen_op_mov_TN_reg[ot][0][R_EAX]();
gen_op_st_T0_A0[ot]();
}
break;
case 0xd7: /* xlat */
gen_op_movl_A0_reg[R_EBX]();
gen_op_addl_A0_AL();
if (s->aflag == 0)
gen_op_andl_A0_ffff();
/* handle override */
{
int override, must_add_seg;
must_add_seg = s->addseg;
override = R_DS;
if (s->override >= 0) {
override = s->override;
must_add_seg = 1;
} else {
override = R_DS;
}
if (must_add_seg) {
gen_op_addl_A0_seg(offsetof(CPUX86State,seg_cache[override].base));
}
}
gen_op_ldub_T0_A0();
gen_op_mov_reg_T0[OT_BYTE][R_EAX]();
break;
case 0xb0 ... 0xb7: /* mov R, Ib */
val = insn_get(s, OT_BYTE);
gen_op_movl_T0_im(val);
gen_op_mov_reg_T0[OT_BYTE][b & 7]();
break;
case 0xb8 ... 0xbf: /* mov R, Iv */
ot = dflag ? OT_LONG : OT_WORD;
val = insn_get(s, ot);
reg = OR_EAX + (b & 7);
gen_op_movl_T0_im(val);
gen_op_mov_reg_T0[ot][reg]();
break;
case 0x91 ... 0x97: /* xchg R, EAX */
ot = dflag ? OT_LONG : OT_WORD;
reg = b & 7;
rm = R_EAX;
goto do_xchg_reg;
case 0x86:
case 0x87: /* xchg Ev, Gv */
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
reg = (modrm >> 3) & 7;
mod = (modrm >> 6) & 3;
if (mod == 3) {
rm = modrm & 7;
do_xchg_reg:
gen_op_mov_TN_reg[ot][0][reg]();
gen_op_mov_TN_reg[ot][1][rm]();
gen_op_mov_reg_T0[ot][rm]();
gen_op_mov_reg_T1[ot][reg]();
} else {
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
gen_op_mov_TN_reg[ot][0][reg]();
/* for xchg, lock is implicit */
if (!(prefixes & PREFIX_LOCK))
gen_op_lock();
gen_op_ld_T1_A0[ot]();
gen_op_st_T0_A0[ot]();
if (!(prefixes & PREFIX_LOCK))
gen_op_unlock();
gen_op_mov_reg_T1[ot][reg]();
}
break;
case 0xc4: /* les Gv */
op = R_ES;
goto do_lxx;
case 0xc5: /* lds Gv */
op = R_DS;
goto do_lxx;
case 0x1b2: /* lss Gv */
op = R_SS;
goto do_lxx;
case 0x1b4: /* lfs Gv */
op = R_FS;
goto do_lxx;
case 0x1b5: /* lgs Gv */
op = R_GS;
do_lxx:
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
reg = (modrm >> 3) & 7;
mod = (modrm >> 6) & 3;
if (mod == 3)
goto illegal_op;
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
gen_op_ld_T1_A0[ot]();
gen_op_addl_A0_im(1 << (ot - OT_WORD + 1));
/* load the segment first to handle exceptions properly */
gen_op_lduw_T0_A0();
gen_movl_seg_T0(s, op);
/* then put the data */
gen_op_mov_reg_T1[ot][reg]();
break;
/************************/
/* shifts */
case 0xc0:
case 0xc1:
/* shift Ev,Ib */
shift = 2;
grp2:
{
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
mod = (modrm >> 6) & 3;
rm = modrm & 7;
op = (modrm >> 3) & 7;
if (mod != 3) {
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
gen_op_ld_T0_A0[ot]();
opreg = OR_TMP0;
} else {
opreg = rm + OR_EAX;
}
/* simpler op */
if (shift == 0) {
gen_shift(s, op, ot, opreg, OR_ECX);
} else {
if (shift == 2) {
shift = ldub(s->pc++);
}
gen_shifti(s, op, ot, opreg, shift);
}
if (mod != 3) {
gen_op_st_T0_A0[ot]();
}
}
break;
case 0xd0:
case 0xd1:
/* shift Ev,1 */
shift = 1;
goto grp2;
case 0xd2:
case 0xd3:
/* shift Ev,cl */
shift = 0;
goto grp2;
case 0x1a4: /* shld imm */
op = 0;
shift = 1;
goto do_shiftd;
case 0x1a5: /* shld cl */
op = 0;
shift = 0;
goto do_shiftd;
case 0x1ac: /* shrd imm */
op = 1;
shift = 1;
goto do_shiftd;
case 0x1ad: /* shrd cl */
op = 1;
shift = 0;
do_shiftd:
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
mod = (modrm >> 6) & 3;
rm = modrm & 7;
reg = (modrm >> 3) & 7;
if (mod != 3) {
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
gen_op_ld_T0_A0[ot]();
} else {
gen_op_mov_TN_reg[ot][0][rm]();
}
gen_op_mov_TN_reg[ot][1][reg]();
if (shift) {
val = ldub(s->pc++);
val &= 0x1f;
if (val) {
gen_op_shiftd_T0_T1_im_cc[ot - OT_WORD][op](val);
if (op == 0 && ot != OT_WORD)
s->cc_op = CC_OP_SHLB + ot;
else
s->cc_op = CC_OP_SARB + ot;
}
} else {
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_op_shiftd_T0_T1_ECX_cc[ot - OT_WORD][op]();
s->cc_op = CC_OP_DYNAMIC; /* cannot predict flags after */
}
if (mod != 3) {
gen_op_st_T0_A0[ot]();
} else {
gen_op_mov_reg_T0[ot][rm]();
}
break;
/************************/
/* floats */
case 0xd8 ... 0xdf:
modrm = ldub(s->pc++);
mod = (modrm >> 6) & 3;
rm = modrm & 7;
op = ((b & 7) << 3) | ((modrm >> 3) & 7);
if (mod != 3) {
/* memory op */
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
switch(op) {
case 0x00 ... 0x07: /* fxxxs */
case 0x10 ... 0x17: /* fixxxl */
case 0x20 ... 0x27: /* fxxxl */
case 0x30 ... 0x37: /* fixxx */
{
int op1;
op1 = op & 7;
switch(op >> 4) {
case 0:
gen_op_flds_FT0_A0();
break;
case 1:
gen_op_fildl_FT0_A0();
break;
case 2:
gen_op_fldl_FT0_A0();
break;
case 3:
default:
gen_op_fild_FT0_A0();
break;
}
gen_op_fp_arith_ST0_FT0[op1]();
if (op1 == 3) {
/* fcomp needs pop */
gen_op_fpop();
}
}
break;
case 0x08: /* flds */
case 0x0a: /* fsts */
case 0x0b: /* fstps */
case 0x18: /* fildl */
case 0x1a: /* fistl */
case 0x1b: /* fistpl */
case 0x28: /* fldl */
case 0x2a: /* fstl */
case 0x2b: /* fstpl */
case 0x38: /* filds */
case 0x3a: /* fists */
case 0x3b: /* fistps */
switch(op & 7) {
case 0:
gen_op_fpush();
switch(op >> 4) {
case 0:
gen_op_flds_ST0_A0();
break;
case 1:
gen_op_fildl_ST0_A0();
break;
case 2:
gen_op_fldl_ST0_A0();
break;
case 3:
default:
gen_op_fild_ST0_A0();
break;
}
break;
default:
switch(op >> 4) {
case 0:
gen_op_fsts_ST0_A0();
break;
case 1:
gen_op_fistl_ST0_A0();
break;
case 2:
gen_op_fstl_ST0_A0();
break;
case 3:
default:
gen_op_fist_ST0_A0();
break;
}
if ((op & 7) == 3)
gen_op_fpop();
break;
}
break;
case 0x0d: /* fldcw mem */
gen_op_fldcw_A0();
break;
case 0x0f: /* fnstcw mem */
gen_op_fnstcw_A0();
break;
case 0x1d: /* fldt mem */
gen_op_fpush();
gen_op_fldt_ST0_A0();
break;
case 0x1f: /* fstpt mem */
gen_op_fstt_ST0_A0();
gen_op_fpop();
break;
case 0x2f: /* fnstsw mem */
gen_op_fnstsw_A0();
break;
case 0x3c: /* fbld */
gen_op_fpush();
gen_op_fbld_ST0_A0();
break;
case 0x3e: /* fbstp */
gen_op_fbst_ST0_A0();
gen_op_fpop();
break;
case 0x3d: /* fildll */
gen_op_fpush();
gen_op_fildll_ST0_A0();
break;
case 0x3f: /* fistpll */
gen_op_fistll_ST0_A0();
gen_op_fpop();
break;
default:
goto illegal_op;
}
} else {
/* register float ops */
opreg = rm;
switch(op) {
case 0x08: /* fld sti */
gen_op_fpush();
gen_op_fmov_ST0_STN((opreg + 1) & 7);
break;
case 0x09: /* fxchg sti */
gen_op_fxchg_ST0_STN(opreg);
break;
case 0x0a: /* grp d9/2 */
switch(rm) {
case 0: /* fnop */
break;
default:
goto illegal_op;
}
break;
case 0x0c: /* grp d9/4 */
switch(rm) {
case 0: /* fchs */
gen_op_fchs_ST0();
break;
case 1: /* fabs */
gen_op_fabs_ST0();
break;
case 4: /* ftst */
gen_op_fldz_FT0();
gen_op_fcom_ST0_FT0();
break;
case 5: /* fxam */
gen_op_fxam_ST0();
break;
default:
goto illegal_op;
}
break;
case 0x0d: /* grp d9/5 */
{
switch(rm) {
case 0:
gen_op_fpush();
gen_op_fld1_ST0();
break;
case 1:
gen_op_fpush();
gen_op_fldl2t_ST0();
break;
case 2:
gen_op_fpush();
gen_op_fldl2e_ST0();
break;
case 3:
gen_op_fpush();
gen_op_fldpi_ST0();
break;
case 4:
gen_op_fpush();
gen_op_fldlg2_ST0();
break;
case 5:
gen_op_fpush();
gen_op_fldln2_ST0();
break;
case 6:
gen_op_fpush();
gen_op_fldz_ST0();
break;
default:
goto illegal_op;
}
}
break;
case 0x0e: /* grp d9/6 */
switch(rm) {
case 0: /* f2xm1 */
gen_op_f2xm1();
break;
case 1: /* fyl2x */
gen_op_fyl2x();
break;
case 2: /* fptan */
gen_op_fptan();
break;
case 3: /* fpatan */
gen_op_fpatan();
break;
case 4: /* fxtract */
gen_op_fxtract();
break;
case 5: /* fprem1 */
gen_op_fprem1();
break;
case 6: /* fdecstp */
gen_op_fdecstp();
break;
default:
case 7: /* fincstp */
gen_op_fincstp();
break;
}
break;
case 0x0f: /* grp d9/7 */
switch(rm) {
case 0: /* fprem */
gen_op_fprem();
break;
case 1: /* fyl2xp1 */
gen_op_fyl2xp1();
break;
case 2: /* fsqrt */
gen_op_fsqrt();
break;
case 3: /* fsincos */
gen_op_fsincos();
break;
case 5: /* fscale */
gen_op_fscale();
break;
case 4: /* frndint */
gen_op_frndint();
break;
case 6: /* fsin */
gen_op_fsin();
break;
default:
case 7: /* fcos */
gen_op_fcos();
break;
}
break;
case 0x00: case 0x01: case 0x04 ... 0x07: /* fxxx st, sti */
case 0x20: case 0x21: case 0x24 ... 0x27: /* fxxx sti, st */
case 0x30: case 0x31: case 0x34 ... 0x37: /* fxxxp sti, st */
{
int op1;
op1 = op & 7;
if (op >= 0x20) {
gen_op_fp_arith_STN_ST0[op1](opreg);
if (op >= 0x30)
gen_op_fpop();
} else {
gen_op_fmov_FT0_STN(opreg);
gen_op_fp_arith_ST0_FT0[op1]();
}
}
break;
case 0x02: /* fcom */
gen_op_fmov_FT0_STN(opreg);
gen_op_fcom_ST0_FT0();
break;
case 0x03: /* fcomp */
gen_op_fmov_FT0_STN(opreg);
gen_op_fcom_ST0_FT0();
gen_op_fpop();
break;
case 0x15: /* da/5 */
switch(rm) {
case 1: /* fucompp */
gen_op_fmov_FT0_STN(1);
gen_op_fucom_ST0_FT0();
gen_op_fpop();
gen_op_fpop();
break;
default:
goto illegal_op;
}
break;
case 0x1c:
switch(rm) {
case 2: /* fclex */
gen_op_fclex();
break;
case 3: /* fninit */
gen_op_fninit();
break;
default:
goto illegal_op;
}
break;
case 0x2a: /* fst sti */
gen_op_fmov_STN_ST0(opreg);
break;
case 0x2b: /* fstp sti */
gen_op_fmov_STN_ST0(opreg);
gen_op_fpop();
break;
case 0x2c: /* fucom st(i) */
gen_op_fmov_FT0_STN(opreg);
gen_op_fucom_ST0_FT0();
break;
case 0x2d: /* fucomp st(i) */
gen_op_fmov_FT0_STN(opreg);
gen_op_fucom_ST0_FT0();
gen_op_fpop();
break;
case 0x33: /* de/3 */
switch(rm) {
case 1: /* fcompp */
gen_op_fmov_FT0_STN(1);
gen_op_fcom_ST0_FT0();
gen_op_fpop();
gen_op_fpop();
break;
default:
goto illegal_op;
}
break;
case 0x3c: /* df/4 */
switch(rm) {
case 0:
gen_op_fnstsw_EAX();
break;
default:
goto illegal_op;
}
break;
default:
goto illegal_op;
}
}
break;
/************************/
/* string ops */
case 0xa4: /* movsS */
case 0xa5:
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
if (prefixes & PREFIX_REPZ) {
gen_string_ds(s, ot, gen_op_movs + 9);
} else {
gen_string_ds(s, ot, gen_op_movs);
}
break;
case 0xaa: /* stosS */
case 0xab:
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
if (prefixes & PREFIX_REPZ) {
gen_string_es(s, ot, gen_op_stos + 9);
} else {
gen_string_es(s, ot, gen_op_stos);
}
break;
case 0xac: /* lodsS */
case 0xad:
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
if (prefixes & PREFIX_REPZ) {
gen_string_ds(s, ot, gen_op_lods + 9);
} else {
gen_string_ds(s, ot, gen_op_lods);
}
break;
case 0xae: /* scasS */
case 0xaf:
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
if (prefixes & PREFIX_REPNZ) {
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_string_es(s, ot, gen_op_scas + 9 * 2);
s->cc_op = CC_OP_DYNAMIC; /* cannot predict flags after */
} else if (prefixes & PREFIX_REPZ) {
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_string_es(s, ot, gen_op_scas + 9);
s->cc_op = CC_OP_DYNAMIC; /* cannot predict flags after */
} else {
gen_string_es(s, ot, gen_op_scas);
s->cc_op = CC_OP_SUBB + ot;
}
break;
case 0xa6: /* cmpsS */
case 0xa7:
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
if (prefixes & PREFIX_REPNZ) {
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_string_ds(s, ot, gen_op_cmps + 9 * 2);
s->cc_op = CC_OP_DYNAMIC; /* cannot predict flags after */
} else if (prefixes & PREFIX_REPZ) {
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_string_ds(s, ot, gen_op_cmps + 9);
s->cc_op = CC_OP_DYNAMIC; /* cannot predict flags after */
} else {
gen_string_ds(s, ot, gen_op_cmps);
s->cc_op = CC_OP_SUBB + ot;
}
break;
case 0x6c: /* insS */
case 0x6d:
if (s->cpl > s->iopl || s->vm86) {
/* NOTE: even for (E)CX = 0 the exception is raised */
gen_op_gpf(pc_start - s->cs_base);
} else {
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
if (prefixes & PREFIX_REPZ) {
gen_string_es(s, ot, gen_op_ins + 9);
} else {
gen_string_es(s, ot, gen_op_ins);
}
}
break;
case 0x6e: /* outsS */
case 0x6f:
if (s->cpl > s->iopl || s->vm86) {
/* NOTE: even for (E)CX = 0 the exception is raised */
gen_op_gpf(pc_start - s->cs_base);
} else {
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
if (prefixes & PREFIX_REPZ) {
gen_string_ds(s, ot, gen_op_outs + 9);
} else {
gen_string_ds(s, ot, gen_op_outs);
}
}
break;
/************************/
/* port I/O */
case 0xe4:
case 0xe5:
if (s->cpl > s->iopl || s->vm86) {
gen_op_gpf(pc_start - s->cs_base);
} else {
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
val = ldub(s->pc++);
gen_op_movl_T0_im(val);
gen_op_in[ot]();
gen_op_mov_reg_T1[ot][R_EAX]();
}
break;
case 0xe6:
case 0xe7:
if (s->cpl > s->iopl || s->vm86) {
gen_op_gpf(pc_start - s->cs_base);
} else {
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
val = ldub(s->pc++);
gen_op_movl_T0_im(val);
gen_op_mov_TN_reg[ot][1][R_EAX]();
gen_op_out[ot]();
}
break;
case 0xec:
case 0xed:
if (s->cpl > s->iopl || s->vm86) {
gen_op_gpf(pc_start - s->cs_base);
} else {
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
gen_op_mov_TN_reg[OT_WORD][0][R_EDX]();
gen_op_in[ot]();
gen_op_mov_reg_T1[ot][R_EAX]();
}
break;
case 0xee:
case 0xef:
if (s->cpl > s->iopl || s->vm86) {
gen_op_gpf(pc_start - s->cs_base);
} else {
if ((b & 1) == 0)
ot = OT_BYTE;
else
ot = dflag ? OT_LONG : OT_WORD;
gen_op_mov_TN_reg[OT_WORD][0][R_EDX]();
gen_op_mov_TN_reg[ot][1][R_EAX]();
gen_op_out[ot]();
}
break;
/************************/
/* control */
case 0xc2: /* ret im */
val = ldsw(s->pc);
s->pc += 2;
gen_pop_T0(s);
if (s->ss32)
gen_op_addl_ESP_im(val + (2 << s->dflag));
else
gen_op_addw_ESP_im(val + (2 << s->dflag));
if (s->dflag == 0)
gen_op_andl_T0_ffff();
gen_op_jmp_T0();
s->is_jmp = 1;
break;
case 0xc3: /* ret */
gen_pop_T0(s);
gen_pop_update(s);
if (s->dflag == 0)
gen_op_andl_T0_ffff();
gen_op_jmp_T0();
s->is_jmp = 1;
break;
case 0xca: /* lret im */
/* XXX: not restartable */
val = ldsw(s->pc);
s->pc += 2;
/* pop offset */
gen_pop_T0(s);
if (s->dflag == 0)
gen_op_andl_T0_ffff();
gen_op_jmp_T0();
gen_pop_update(s);
/* pop selector */
gen_pop_T0(s);
gen_movl_seg_T0(s, R_CS);
gen_pop_update(s);
/* add stack offset */
if (s->ss32)
gen_op_addl_ESP_im(val + (2 << s->dflag));
else
gen_op_addw_ESP_im(val + (2 << s->dflag));
s->is_jmp = 1;
break;
case 0xcb: /* lret */
/* XXX: not restartable */
/* pop offset */
gen_pop_T0(s);
if (s->dflag == 0)
gen_op_andl_T0_ffff();
gen_op_jmp_T0();
gen_pop_update(s);
/* pop selector */
gen_pop_T0(s);
gen_movl_seg_T0(s, R_CS);
gen_pop_update(s);
s->is_jmp = 1;
break;
case 0xcf: /* iret */
/* XXX: not restartable */
/* pop offset */
gen_pop_T0(s);
if (s->dflag == 0)
gen_op_andl_T0_ffff();
gen_op_jmp_T0();
gen_pop_update(s);
/* pop selector */
gen_pop_T0(s);
gen_movl_seg_T0(s, R_CS);
gen_pop_update(s);
/* pop eflags */
gen_pop_T0(s);
if (s->dflag) {
if (s->vm86)
gen_op_movl_eflags_T0_vm(pc_start - s->cs_base);
else
gen_op_movl_eflags_T0();
} else {
if (s->vm86)
gen_op_movw_eflags_T0_vm(pc_start - s->cs_base);
else
gen_op_movw_eflags_T0();
}
gen_pop_update(s);
s->cc_op = CC_OP_EFLAGS;
s->is_jmp = 1;
break;
case 0xe8: /* call im */
{
unsigned int next_eip;
ot = dflag ? OT_LONG : OT_WORD;
val = insn_get(s, ot);
next_eip = s->pc - s->cs_base;
val += next_eip;
if (s->dflag == 0)
val &= 0xffff;
gen_op_movl_T0_im(next_eip);
gen_push_T0(s);
gen_op_jmp_im(val);
s->is_jmp = 1;
}
break;
case 0x9a: /* lcall im */
{
unsigned int selector, offset;
ot = dflag ? OT_LONG : OT_WORD;
offset = insn_get(s, ot);
selector = insn_get(s, OT_WORD);
/* push return segment + offset */
gen_op_movl_T0_seg(R_CS);
gen_push_T0(s);
next_eip = s->pc - s->cs_base;
gen_op_movl_T0_im(next_eip);
gen_push_T0(s);
/* change cs and pc */
gen_op_movl_T0_im(selector);
gen_movl_seg_T0(s, R_CS);
gen_op_jmp_im((unsigned long)offset);
s->is_jmp = 1;
}
break;
case 0xe9: /* jmp */
ot = dflag ? OT_LONG : OT_WORD;
val = insn_get(s, ot);
val += s->pc - s->cs_base;
if (s->dflag == 0)
val = val & 0xffff;
gen_op_jmp_im(val);
s->is_jmp = 1;
break;
case 0xea: /* ljmp im */
{
unsigned int selector, offset;
ot = dflag ? OT_LONG : OT_WORD;
offset = insn_get(s, ot);
selector = insn_get(s, OT_WORD);
/* change cs and pc */
gen_op_movl_T0_im(selector);
gen_movl_seg_T0(s, R_CS);
gen_op_jmp_im((unsigned long)offset);
s->is_jmp = 1;
}
break;
case 0xeb: /* jmp Jb */
val = (int8_t)insn_get(s, OT_BYTE);
val += s->pc - s->cs_base;
if (s->dflag == 0)
val = val & 0xffff;
gen_op_jmp_im(val);
s->is_jmp = 1;
break;
case 0x70 ... 0x7f: /* jcc Jb */
val = (int8_t)insn_get(s, OT_BYTE);
goto do_jcc;
case 0x180 ... 0x18f: /* jcc Jv */
if (dflag) {
val = insn_get(s, OT_LONG);
} else {
val = (int16_t)insn_get(s, OT_WORD);
}
do_jcc:
next_eip = s->pc - s->cs_base;
val += next_eip;
if (s->dflag == 0)
val &= 0xffff;
gen_jcc(s, b, val, next_eip);
s->is_jmp = 1;
break;
case 0x190 ... 0x19f: /* setcc Gv */
modrm = ldub(s->pc++);
gen_setcc(s, b);
gen_ldst_modrm(s, modrm, OT_BYTE, OR_TMP0, 1);
break;
case 0x140 ... 0x14f: /* cmov Gv, Ev */
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
reg = (modrm >> 3) & 7;
mod = (modrm >> 6) & 3;
gen_setcc(s, b);
if (mod != 3) {
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
gen_op_ld_T1_A0[ot]();
} else {
rm = modrm & 7;
gen_op_mov_TN_reg[ot][1][rm]();
}
gen_op_cmov_reg_T1_T0[ot - OT_WORD][reg]();
break;
/************************/
/* flags */
case 0x9c: /* pushf */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
if (s->vm86)
gen_op_movl_T0_eflags_vm();
else
gen_op_movl_T0_eflags();
gen_push_T0(s);
break;
case 0x9d: /* popf */
gen_pop_T0(s);
if (s->dflag) {
if (s->vm86)
gen_op_movl_eflags_T0_vm(pc_start - s->cs_base);
else
gen_op_movl_eflags_T0();
} else {
if (s->vm86)
gen_op_movw_eflags_T0_vm(pc_start - s->cs_base);
else
gen_op_movw_eflags_T0();
}
gen_pop_update(s);
s->cc_op = CC_OP_EFLAGS;
break;
case 0x9e: /* sahf */
gen_op_mov_TN_reg[OT_BYTE][0][R_AH]();
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_op_movb_eflags_T0();
s->cc_op = CC_OP_EFLAGS;
break;
case 0x9f: /* lahf */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_op_movl_T0_eflags();
gen_op_mov_reg_T0[OT_BYTE][R_AH]();
break;
case 0xf5: /* cmc */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_op_cmc();
s->cc_op = CC_OP_EFLAGS;
break;
case 0xf8: /* clc */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_op_clc();
s->cc_op = CC_OP_EFLAGS;
break;
case 0xf9: /* stc */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_op_stc();
s->cc_op = CC_OP_EFLAGS;
break;
case 0xfc: /* cld */
gen_op_cld();
break;
case 0xfd: /* std */
gen_op_std();
break;
/************************/
/* bit operations */
case 0x1ba: /* bt/bts/btr/btc Gv, im */
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
op = (modrm >> 3) & 7;
mod = (modrm >> 6) & 3;
rm = modrm & 7;
if (mod != 3) {
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
gen_op_ld_T0_A0[ot]();
} else {
gen_op_mov_TN_reg[ot][0][rm]();
}
/* load shift */
val = ldub(s->pc++);
gen_op_movl_T1_im(val);
if (op < 4)
goto illegal_op;
op -= 4;
gen_op_btx_T0_T1_cc[ot - OT_WORD][op]();
s->cc_op = CC_OP_SARB + ot;
if (op != 0) {
if (mod != 3)
gen_op_st_T0_A0[ot]();
else
gen_op_mov_reg_T0[ot][rm]();
}
break;
case 0x1a3: /* bt Gv, Ev */
op = 0;
goto do_btx;
case 0x1ab: /* bts */
op = 1;
goto do_btx;
case 0x1b3: /* btr */
op = 2;
goto do_btx;
case 0x1bb: /* btc */
op = 3;
do_btx:
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
reg = (modrm >> 3) & 7;
mod = (modrm >> 6) & 3;
rm = modrm & 7;
gen_op_mov_TN_reg[OT_LONG][1][reg]();
if (mod != 3) {
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
/* specific case: we need to add a displacement */
if (ot == OT_WORD)
gen_op_add_bitw_A0_T1();
else
gen_op_add_bitl_A0_T1();
gen_op_ld_T0_A0[ot]();
} else {
gen_op_mov_TN_reg[ot][0][rm]();
}
gen_op_btx_T0_T1_cc[ot - OT_WORD][op]();
s->cc_op = CC_OP_SARB + ot;
if (op != 0) {
if (mod != 3)
gen_op_st_T0_A0[ot]();
else
gen_op_mov_reg_T0[ot][rm]();
}
break;
case 0x1bc: /* bsf */
case 0x1bd: /* bsr */
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
reg = (modrm >> 3) & 7;
gen_ldst_modrm(s, modrm, ot, OR_TMP0, 0);
gen_op_bsx_T0_cc[ot - OT_WORD][b & 1]();
/* NOTE: we always write back the result. Intel doc says it is
undefined if T0 == 0 */
gen_op_mov_reg_T0[ot][reg]();
s->cc_op = CC_OP_LOGICB + ot;
break;
/************************/
/* bcd */
case 0x27: /* daa */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_op_daa();
s->cc_op = CC_OP_EFLAGS;
break;
case 0x2f: /* das */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_op_das();
s->cc_op = CC_OP_EFLAGS;
break;
case 0x37: /* aaa */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_op_aaa();
s->cc_op = CC_OP_EFLAGS;
break;
case 0x3f: /* aas */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_op_aas();
s->cc_op = CC_OP_EFLAGS;
break;
case 0xd4: /* aam */
val = ldub(s->pc++);
gen_op_aam(val);
s->cc_op = CC_OP_LOGICB;
break;
case 0xd5: /* aad */
val = ldub(s->pc++);
gen_op_aad(val);
s->cc_op = CC_OP_LOGICB;
break;
/************************/
/* misc */
case 0x90: /* nop */
break;
case 0xcc: /* int3 */
gen_op_int3((long)pc_start);
s->is_jmp = 1;
break;
case 0xcd: /* int N */
val = ldub(s->pc++);
gen_op_int_im(val, pc_start - s->cs_base);
s->is_jmp = 1;
break;
case 0xce: /* into */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_op_into();
break;
case 0xfa: /* cli */
if (!s->vm86) {
if (s->cpl <= s->iopl)
gen_op_cli();
else
gen_op_gpf(pc_start - s->cs_base);
} else {
if (s->iopl == 3)
gen_op_cli();
else
gen_op_cli_vm();
}
break;
case 0xfb: /* sti */
if (!s->vm86) {
if (s->cpl <= s->iopl)
gen_op_sti();
else
gen_op_gpf(pc_start - s->cs_base);
} else {
if (s->iopl == 3)
gen_op_sti();
else
gen_op_sti_vm(pc_start - s->cs_base);
}
break;
case 0x62: /* bound */
ot = dflag ? OT_LONG : OT_WORD;
modrm = ldub(s->pc++);
reg = (modrm >> 3) & 7;
mod = (modrm >> 6) & 3;
if (mod == 3)
goto illegal_op;
gen_op_mov_reg_T0[ot][reg]();
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
if (ot == OT_WORD)
gen_op_boundw();
else
gen_op_boundl();
break;
case 0x1c8 ... 0x1cf: /* bswap reg */
reg = b & 7;
gen_op_mov_TN_reg[OT_LONG][0][reg]();
gen_op_bswapl_T0();
gen_op_mov_reg_T0[OT_LONG][reg]();
break;
case 0xd6: /* salc */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_op_salc();
break;
case 0xe0: /* loopnz */
case 0xe1: /* loopz */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
/* FALL THRU */
case 0xe2: /* loop */
case 0xe3: /* jecxz */
val = (int8_t)insn_get(s, OT_BYTE);
next_eip = s->pc - s->cs_base;
val += next_eip;
if (s->dflag == 0)
val &= 0xffff;
gen_op_loop[s->aflag][b & 3](val, next_eip);
s->is_jmp = 1;
break;
case 0x131: /* rdtsc */
gen_op_rdtsc();
break;
case 0x1a2: /* cpuid */
gen_op_cpuid();
break;
case 0xf4: /* hlt */
if (s->cpl == 0) {
/* ignored */
} else {
gen_op_gpf(pc_start - s->cs_base);
}
break;
default:
goto illegal_op;
}
/* lock generation */
if (s->prefix & PREFIX_LOCK)
gen_op_unlock();
return (long)s->pc;
illegal_op:
/* XXX: ensure that no lock was generated */
return -1;
}
#define CC_OSZAPC (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C)
#define CC_OSZAP (CC_O | CC_S | CC_Z | CC_A | CC_P)
/* flags read by an operation */
static uint16_t opc_read_flags[NB_OPS] = {
[INDEX_op_aas] = CC_A,
[INDEX_op_aaa] = CC_A,
[INDEX_op_das] = CC_A | CC_C,
[INDEX_op_daa] = CC_A | CC_C,
[INDEX_op_adcb_T0_T1_cc] = CC_C,
[INDEX_op_adcw_T0_T1_cc] = CC_C,
[INDEX_op_adcl_T0_T1_cc] = CC_C,
[INDEX_op_sbbb_T0_T1_cc] = CC_C,
[INDEX_op_sbbw_T0_T1_cc] = CC_C,
[INDEX_op_sbbl_T0_T1_cc] = CC_C,
/* subtle: due to the incl/decl implementation, C is used */
[INDEX_op_incl_T0_cc] = CC_C,
[INDEX_op_decl_T0_cc] = CC_C,
[INDEX_op_into] = CC_O,
[INDEX_op_jo_cc] = CC_O,
[INDEX_op_jb_cc] = CC_C,
[INDEX_op_jz_cc] = CC_Z,
[INDEX_op_jbe_cc] = CC_Z | CC_C,
[INDEX_op_js_cc] = CC_S,
[INDEX_op_jp_cc] = CC_P,
[INDEX_op_jl_cc] = CC_O | CC_S,
[INDEX_op_jle_cc] = CC_O | CC_S | CC_Z,
[INDEX_op_jb_subb] = CC_C,
[INDEX_op_jb_subw] = CC_C,
[INDEX_op_jb_subl] = CC_C,
[INDEX_op_jz_subb] = CC_Z,
[INDEX_op_jz_subw] = CC_Z,
[INDEX_op_jz_subl] = CC_Z,
[INDEX_op_jbe_subb] = CC_Z | CC_C,
[INDEX_op_jbe_subw] = CC_Z | CC_C,
[INDEX_op_jbe_subl] = CC_Z | CC_C,
[INDEX_op_js_subb] = CC_S,
[INDEX_op_js_subw] = CC_S,
[INDEX_op_js_subl] = CC_S,
[INDEX_op_jl_subb] = CC_O | CC_S,
[INDEX_op_jl_subw] = CC_O | CC_S,
[INDEX_op_jl_subl] = CC_O | CC_S,
[INDEX_op_jle_subb] = CC_O | CC_S | CC_Z,
[INDEX_op_jle_subw] = CC_O | CC_S | CC_Z,
[INDEX_op_jle_subl] = CC_O | CC_S | CC_Z,
[INDEX_op_loopnzw] = CC_Z,
[INDEX_op_loopnzl] = CC_Z,
[INDEX_op_loopzw] = CC_Z,
[INDEX_op_loopzl] = CC_Z,
[INDEX_op_seto_T0_cc] = CC_O,
[INDEX_op_setb_T0_cc] = CC_C,
[INDEX_op_setz_T0_cc] = CC_Z,
[INDEX_op_setbe_T0_cc] = CC_Z | CC_C,
[INDEX_op_sets_T0_cc] = CC_S,
[INDEX_op_setp_T0_cc] = CC_P,
[INDEX_op_setl_T0_cc] = CC_O | CC_S,
[INDEX_op_setle_T0_cc] = CC_O | CC_S | CC_Z,
[INDEX_op_setb_T0_subb] = CC_C,
[INDEX_op_setb_T0_subw] = CC_C,
[INDEX_op_setb_T0_subl] = CC_C,
[INDEX_op_setz_T0_subb] = CC_Z,
[INDEX_op_setz_T0_subw] = CC_Z,
[INDEX_op_setz_T0_subl] = CC_Z,
[INDEX_op_setbe_T0_subb] = CC_Z | CC_C,
[INDEX_op_setbe_T0_subw] = CC_Z | CC_C,
[INDEX_op_setbe_T0_subl] = CC_Z | CC_C,
[INDEX_op_sets_T0_subb] = CC_S,
[INDEX_op_sets_T0_subw] = CC_S,
[INDEX_op_sets_T0_subl] = CC_S,
[INDEX_op_setl_T0_subb] = CC_O | CC_S,
[INDEX_op_setl_T0_subw] = CC_O | CC_S,
[INDEX_op_setl_T0_subl] = CC_O | CC_S,
[INDEX_op_setle_T0_subb] = CC_O | CC_S | CC_Z,
[INDEX_op_setle_T0_subw] = CC_O | CC_S | CC_Z,
[INDEX_op_setle_T0_subl] = CC_O | CC_S | CC_Z,
[INDEX_op_movl_T0_eflags] = CC_OSZAPC,
[INDEX_op_movl_T0_eflags_vm] = CC_OSZAPC,
[INDEX_op_cmc] = CC_C,
[INDEX_op_salc] = CC_C,
[INDEX_op_rclb_T0_T1_cc] = CC_C,
[INDEX_op_rclw_T0_T1_cc] = CC_C,
[INDEX_op_rcll_T0_T1_cc] = CC_C,
[INDEX_op_rcrb_T0_T1_cc] = CC_C,
[INDEX_op_rcrw_T0_T1_cc] = CC_C,
[INDEX_op_rcrl_T0_T1_cc] = CC_C,
};
/* flags written by an operation */
static uint16_t opc_write_flags[NB_OPS] = {
[INDEX_op_addl_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_orl_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_adcb_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_adcw_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_adcl_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_sbbb_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_sbbw_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_sbbl_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_andl_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_subl_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_xorl_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_cmpl_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_negl_T0_cc] = CC_OSZAPC,
/* subtle: due to the incl/decl implementation, C is used */
[INDEX_op_incl_T0_cc] = CC_OSZAPC,
[INDEX_op_decl_T0_cc] = CC_OSZAPC,
[INDEX_op_testl_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_mulb_AL_T0] = CC_OSZAPC,
[INDEX_op_imulb_AL_T0] = CC_OSZAPC,
[INDEX_op_mulw_AX_T0] = CC_OSZAPC,
[INDEX_op_imulw_AX_T0] = CC_OSZAPC,
[INDEX_op_mull_EAX_T0] = CC_OSZAPC,
[INDEX_op_imull_EAX_T0] = CC_OSZAPC,
[INDEX_op_imulw_T0_T1] = CC_OSZAPC,
[INDEX_op_imull_T0_T1] = CC_OSZAPC,
/* bcd */
[INDEX_op_aam] = CC_OSZAPC,
[INDEX_op_aad] = CC_OSZAPC,
[INDEX_op_aas] = CC_OSZAPC,
[INDEX_op_aaa] = CC_OSZAPC,
[INDEX_op_das] = CC_OSZAPC,
[INDEX_op_daa] = CC_OSZAPC,
[INDEX_op_movb_eflags_T0] = CC_S | CC_Z | CC_A | CC_P | CC_C,
[INDEX_op_movw_eflags_T0] = CC_OSZAPC,
[INDEX_op_movw_eflags_T0_vm] = CC_OSZAPC,
[INDEX_op_movl_eflags_T0] = CC_OSZAPC,
[INDEX_op_movl_eflags_T0_vm] = CC_OSZAPC,
[INDEX_op_clc] = CC_C,
[INDEX_op_stc] = CC_C,
[INDEX_op_cmc] = CC_C,
[INDEX_op_rolb_T0_T1_cc] = CC_O | CC_C,
[INDEX_op_rolw_T0_T1_cc] = CC_O | CC_C,
[INDEX_op_roll_T0_T1_cc] = CC_O | CC_C,
[INDEX_op_rorb_T0_T1_cc] = CC_O | CC_C,
[INDEX_op_rorw_T0_T1_cc] = CC_O | CC_C,
[INDEX_op_rorl_T0_T1_cc] = CC_O | CC_C,
[INDEX_op_rclb_T0_T1_cc] = CC_O | CC_C,
[INDEX_op_rclw_T0_T1_cc] = CC_O | CC_C,
[INDEX_op_rcll_T0_T1_cc] = CC_O | CC_C,
[INDEX_op_rcrb_T0_T1_cc] = CC_O | CC_C,
[INDEX_op_rcrw_T0_T1_cc] = CC_O | CC_C,
[INDEX_op_rcrl_T0_T1_cc] = CC_O | CC_C,
[INDEX_op_shlb_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_shlw_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_shll_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_shrb_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_shrw_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_shrl_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_sarb_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_sarw_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_sarl_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_shldw_T0_T1_ECX_cc] = CC_OSZAPC,
[INDEX_op_shldl_T0_T1_ECX_cc] = CC_OSZAPC,
[INDEX_op_shldw_T0_T1_im_cc] = CC_OSZAPC,
[INDEX_op_shldl_T0_T1_im_cc] = CC_OSZAPC,
[INDEX_op_shrdw_T0_T1_ECX_cc] = CC_OSZAPC,
[INDEX_op_shrdl_T0_T1_ECX_cc] = CC_OSZAPC,
[INDEX_op_shrdw_T0_T1_im_cc] = CC_OSZAPC,
[INDEX_op_shrdl_T0_T1_im_cc] = CC_OSZAPC,
[INDEX_op_btw_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_btl_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_btsw_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_btsl_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_btrw_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_btrl_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_btcw_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_btcl_T0_T1_cc] = CC_OSZAPC,
[INDEX_op_bsfw_T0_cc] = CC_OSZAPC,
[INDEX_op_bsfl_T0_cc] = CC_OSZAPC,
[INDEX_op_bsrw_T0_cc] = CC_OSZAPC,
[INDEX_op_bsrl_T0_cc] = CC_OSZAPC,
#undef STRINGOP
#define STRINGOP(x) \
[INDEX_op_ ## x ## b_fast] = CC_OSZAPC, \
[INDEX_op_ ## x ## w_fast] = CC_OSZAPC, \
[INDEX_op_ ## x ## l_fast] = CC_OSZAPC, \
[INDEX_op_ ## x ## b_a32] = CC_OSZAPC, \
[INDEX_op_ ## x ## w_a32] = CC_OSZAPC, \
[INDEX_op_ ## x ## l_a32] = CC_OSZAPC, \
[INDEX_op_ ## x ## b_a16] = CC_OSZAPC, \
[INDEX_op_ ## x ## w_a16] = CC_OSZAPC, \
[INDEX_op_ ## x ## l_a16] = CC_OSZAPC,
STRINGOP(scas)
STRINGOP(repz_scas)
STRINGOP(repnz_scas)
STRINGOP(cmps)
STRINGOP(repz_cmps)
STRINGOP(repnz_cmps)
[INDEX_op_cmpxchgb_T0_T1_EAX_cc] = CC_OSZAPC,
[INDEX_op_cmpxchgw_T0_T1_EAX_cc] = CC_OSZAPC,
[INDEX_op_cmpxchgl_T0_T1_EAX_cc] = CC_OSZAPC,
[INDEX_op_cmpxchg8b] = CC_Z,
};
/* simpler form of an operation if no flags need to be generated */
static uint16_t opc_simpler[NB_OPS] = {
[INDEX_op_addl_T0_T1_cc] = INDEX_op_addl_T0_T1,
[INDEX_op_orl_T0_T1_cc] = INDEX_op_orl_T0_T1,
[INDEX_op_andl_T0_T1_cc] = INDEX_op_andl_T0_T1,
[INDEX_op_subl_T0_T1_cc] = INDEX_op_subl_T0_T1,
[INDEX_op_xorl_T0_T1_cc] = INDEX_op_xorl_T0_T1,
[INDEX_op_negl_T0_cc] = INDEX_op_negl_T0,
[INDEX_op_incl_T0_cc] = INDEX_op_incl_T0,
[INDEX_op_decl_T0_cc] = INDEX_op_decl_T0,
[INDEX_op_rolb_T0_T1_cc] = INDEX_op_rolb_T0_T1,
[INDEX_op_rolw_T0_T1_cc] = INDEX_op_rolw_T0_T1,
[INDEX_op_roll_T0_T1_cc] = INDEX_op_roll_T0_T1,
[INDEX_op_rorb_T0_T1_cc] = INDEX_op_rorb_T0_T1,
[INDEX_op_rorw_T0_T1_cc] = INDEX_op_rorw_T0_T1,
[INDEX_op_rorl_T0_T1_cc] = INDEX_op_rorl_T0_T1,
[INDEX_op_shlb_T0_T1_cc] = INDEX_op_shlb_T0_T1,
[INDEX_op_shlw_T0_T1_cc] = INDEX_op_shlw_T0_T1,
[INDEX_op_shll_T0_T1_cc] = INDEX_op_shll_T0_T1,
[INDEX_op_shrb_T0_T1_cc] = INDEX_op_shrb_T0_T1,
[INDEX_op_shrw_T0_T1_cc] = INDEX_op_shrw_T0_T1,
[INDEX_op_shrl_T0_T1_cc] = INDEX_op_shrl_T0_T1,
[INDEX_op_sarb_T0_T1_cc] = INDEX_op_sarb_T0_T1,
[INDEX_op_sarw_T0_T1_cc] = INDEX_op_sarw_T0_T1,
[INDEX_op_sarl_T0_T1_cc] = INDEX_op_sarl_T0_T1,
};
static void optimize_flags_init(void)
{
int i;
/* put default values in arrays */
for(i = 0; i < NB_OPS; i++) {
if (opc_simpler[i] == 0)
opc_simpler[i] = i;
}
}
/* CPU flags computation optimization: we move backward thru the
generated code to see which flags are needed. The operation is
modified if suitable */
static void optimize_flags(uint16_t *opc_buf, int opc_buf_len)
{
uint16_t *opc_ptr;
int live_flags, write_flags, op;
opc_ptr = opc_buf + opc_buf_len;
/* live_flags contains the flags needed by the next instructions
in the code. At the end of the bloc, we consider that all the
flags are live. */
live_flags = CC_OSZAPC;
while (opc_ptr > opc_buf) {
op = *--opc_ptr;
/* if none of the flags written by the instruction is used,
then we can try to find a simpler instruction */
write_flags = opc_write_flags[op];
if ((live_flags & write_flags) == 0) {
*opc_ptr = opc_simpler[op];
}
/* compute the live flags before the instruction */
live_flags &= ~write_flags;
live_flags |= opc_read_flags[op];
}
}
#ifdef DEBUG_DISAS
static const char *op_str[] = {
#define DEF(s, n) #s,
#include "opc-i386.h"
#undef DEF
};
static uint8_t op_nb_args[] = {
#define DEF(s, n) n,
#include "opc-i386.h"
#undef DEF
};
static void dump_ops(const uint16_t *opc_buf, const uint32_t *opparam_buf)
{
const uint16_t *opc_ptr;
const uint32_t *opparam_ptr;
int c, n, i;
opc_ptr = opc_buf;
opparam_ptr = opparam_buf;
for(;;) {
c = *opc_ptr++;
n = op_nb_args[c];
fprintf(logfile, "0x%04x: %s", opc_ptr - opc_buf - 1, op_str[c]);
for(i = 0; i < n; i++) {
fprintf(logfile, " 0x%x", opparam_ptr[i]);
}
fprintf(logfile, "\n");
if (c == INDEX_op_end)
break;
opparam_ptr += n;
}
}
#endif
/* XXX: make this buffer thread safe */
/* XXX: make safe guess about sizes */
#define MAX_OP_PER_INSTR 32
#define OPC_BUF_SIZE 512
#define OPC_MAX_SIZE (OPC_BUF_SIZE - MAX_OP_PER_INSTR)
#define OPPARAM_BUF_SIZE (OPC_BUF_SIZE * 3)
static uint16_t gen_opc_buf[OPC_BUF_SIZE];
static uint32_t gen_opparam_buf[OPPARAM_BUF_SIZE];
/* return non zero if the very first instruction is invalid so that
the virtual CPU can trigger an exception. */
int cpu_x86_gen_code(uint8_t *gen_code_buf, int max_code_size,
int *gen_code_size_ptr,
uint8_t *pc_start, uint8_t *cs_base, int flags)
{
DisasContext dc1, *dc = &dc1;
uint8_t *pc_ptr;
uint16_t *gen_opc_end;
int gen_code_size;
long ret;
/* generate intermediate code */
dc->code32 = (flags >> GEN_FLAG_CODE32_SHIFT) & 1;
dc->ss32 = (flags >> GEN_FLAG_SS32_SHIFT) & 1;
dc->addseg = (flags >> GEN_FLAG_ADDSEG_SHIFT) & 1;
dc->f_st = (flags >> GEN_FLAG_ST_SHIFT) & 7;
dc->vm86 = (flags >> GEN_FLAG_VM_SHIFT) & 1;
dc->cpl = (flags >> GEN_FLAG_CPL_SHIFT) & 3;
dc->iopl = (flags >> GEN_FLAG_IOPL_SHIFT) & 3;
dc->cc_op = CC_OP_DYNAMIC;
dc->cs_base = cs_base;
gen_opc_ptr = gen_opc_buf;
gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
gen_opparam_ptr = gen_opparam_buf;
dc->is_jmp = 0;
pc_ptr = pc_start;
do {
ret = disas_insn(dc, pc_ptr);
if (ret == -1) {
/* we trigger an illegal instruction operation only if it
is the first instruction. Otherwise, we simply stop
generating the code just before it */
if (pc_ptr == pc_start)
return -1;
else
break;
}
pc_ptr = (void *)ret;
} while (!dc->is_jmp && gen_opc_ptr < gen_opc_end);
/* we must store the eflags state if it is not already done */
if (dc->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(dc->cc_op);
if (dc->is_jmp != 1) {
/* we add an additionnal jmp to update the simulated PC */
gen_op_jmp_im(ret - (unsigned long)dc->cs_base);
}
*gen_opc_ptr = INDEX_op_end;
#ifdef DEBUG_DISAS
if (loglevel) {
fprintf(logfile, "----------------\n");
fprintf(logfile, "IN: %s\n", lookup_symbol(pc_start));
disas(logfile, pc_start, pc_ptr - pc_start,
dc->code32 ? DISAS_I386_I386 : DISAS_I386_I8086);
fprintf(logfile, "\n");
fprintf(logfile, "OP:\n");
dump_ops(gen_opc_buf, gen_opparam_buf);
fprintf(logfile, "\n");
}
#endif
/* optimize flag computations */
optimize_flags(gen_opc_buf, gen_opc_ptr - gen_opc_buf);
#ifdef DEBUG_DISAS
if (loglevel) {
fprintf(logfile, "AFTER FLAGS OPT:\n");
dump_ops(gen_opc_buf, gen_opparam_buf);
fprintf(logfile, "\n");
}
#endif
/* generate machine code */
gen_code_size = dyngen_code(gen_code_buf, gen_opc_buf, gen_opparam_buf);
flush_icache_range((unsigned long)gen_code_buf, (unsigned long)(gen_code_buf + gen_code_size));
*gen_code_size_ptr = gen_code_size;
#ifdef DEBUG_DISAS
if (loglevel) {
fprintf(logfile, "OUT: [size=%d]\n", *gen_code_size_ptr);
disas(logfile, gen_code_buf, *gen_code_size_ptr, DISAS_TARGET);
fprintf(logfile, "\n");
fflush(logfile);
}
#endif
return 0;
}
CPUX86State *cpu_x86_init(void)
{
CPUX86State *env;
int i;
static int inited;
cpu_x86_tblocks_init();
env = malloc(sizeof(CPUX86State));
if (!env)
return NULL;
memset(env, 0, sizeof(CPUX86State));
/* basic FPU init */
for(i = 0;i < 8; i++)
env->fptags[i] = 1;
env->fpuc = 0x37f;
/* flags setup : we activate the IRQs by default as in user mode */
env->eflags = 0x2 | IF_MASK;
/* init various static tables */
if (!inited) {
inited = 1;
optimize_flags_init();
}
return env;
}
void cpu_x86_close(CPUX86State *env)
{
free(env);
}
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