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MFC r267372-267374: fix various misimplementation of instructions.

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Submitted by:	Wolf Ramovsky <wolf.ramovsky gmail.com>
This commit is contained in:
delphij 2014-07-01 15:55:41 +00:00
parent efafd0ece4
commit d060b29544
1 changed files with 25 additions and 14 deletions
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39
sys/contrib/x86emu/x86emu.c
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@ -2151,21 +2151,24 @@ x86emuOp_mov_word_RM_SR(struct x86emu *emu)
static void
x86emuOp_lea_word_R_M(struct x86emu *emu)
{
uint16_t *srcreg;
uint32_t destoffset;
/*
* TODO: Need to handle address size prefix!
*
* lea eax,[eax+ebx*2] ??
*/
fetch_decode_modrm(emu);
if (emu->cur_mod == 3)
x86emu_halt_sys(emu);
srcreg = decode_rh_word_register(emu);
destoffset = decode_rl_address(emu);
*srcreg = (uint16_t) destoffset;
if (emu->x86.mode & SYSMODE_PREFIX_ADDR) {
uint32_t *srcreg;
srcreg = decode_rh_long_register(emu);
*srcreg = (uint32_t) destoffset;
} else {
uint16_t *srcreg;
srcreg = decode_rh_word_register(emu);
*srcreg = (uint16_t) destoffset;
}
}
/*
@ -3750,12 +3753,19 @@ x86emuOp_out_word_IMM_AX(struct x86emu *emu)
static void
x86emuOp_call_near_IMM(struct x86emu *emu)
{
int16_t ip;
ip = (int16_t) fetch_word_imm(emu);
ip += (int16_t) emu->x86.R_IP; /* CHECK SIGN */
push_word(emu, emu->x86.R_IP);
emu->x86.R_IP = ip;
if (emu->x86.mode & SYSMODE_PREFIX_DATA) {
int32_t ip;
ip = (int32_t) fetch_long_imm(emu);
ip += (int32_t) emu->x86.R_EIP;
push_long(emu, emu->x86.R_EIP);
emu->x86.R_EIP = ip;
} else {
int16_t ip;
ip = (int16_t) fetch_word_imm(emu);
ip += (int16_t) emu->x86.R_IP; /* CHECK SIGN */
push_word(emu, emu->x86.R_IP);
emu->x86.R_IP = ip;
}
}
/*
@ -5610,6 +5620,7 @@ x86emuOp2_32_movsx_byte_R_RM(struct x86emu *emu)
{
uint32_t *destreg;
fetch_decode_modrm(emu);
destreg = decode_rh_long_register(emu);
*destreg = (int32_t)(int8_t)decode_and_fetch_byte(emu);
}