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fixed eflags IF/IOPL update 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@476 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2003-11-23 23:09:40 +00:00
parent 6dca2016fc
commit 4136f33c7e
4 changed files with 70 additions and 59 deletions
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5
target-i386/exec.h
View File

@ -512,11 +512,6 @@ static inline uint32_t compute_eflags(void)
return env->eflags | cc_table[CC_OP].compute_all() | (DF & DF_MASK);
}
#define FL_UPDATE_MASK32 (TF_MASK | AC_MASK | ID_MASK)
#define FL_UPDATE_CPL0_MASK (TF_MASK | IF_MASK | IOPL_MASK | NT_MASK | \
RF_MASK | AC_MASK | ID_MASK)
/* NOTE: CC_OP must be modified manually to CC_OP_EFLAGS */
static inline void load_eflags(int eflags, int update_mask)
{

74
target-i386/helper.c
View File

@ -419,7 +419,8 @@ static void switch_tss(int tss_selector,
/* load all registers without an exception, then reload them with
possible exception */
env->eip = new_eip;
eflags_mask = FL_UPDATE_CPL0_MASK;
eflags_mask = TF_MASK | AC_MASK | ID_MASK |
IF_MASK | IOPL_MASK | VM_MASK | RF_MASK;
if (!(type & 8))
eflags_mask &= 0xffff;
load_eflags(new_eflags, eflags_mask);
@ -575,27 +576,6 @@ static void do_interrupt_protected(int intno, int is_int, int error_code,
uint32_t e1, e2, offset, ss, esp, ss_e1, ss_e2;
uint32_t old_eip;
#ifdef DEBUG_PCALL
if (loglevel) {
static int count;
fprintf(logfile, "%d: interrupt: vector=%02x error_code=%04x int=%d CS:IP=%04x:%08x CPL=%d\n",
count, intno, error_code, is_int, env->segs[R_CS].selector, env->eip, env->hflags & 3);
#if 0
{
int i;
uint8_t *ptr;
printf(" code=");
ptr = env->segs[R_CS].base + env->eip;
for(i = 0; i < 16; i++) {
printf(" %02x", ldub(ptr + i));
}
printf("\n");
}
#endif
count++;
}
#endif
has_error_code = 0;
if (!is_int && !is_hw) {
switch(intno) {
@ -775,7 +755,7 @@ static void do_interrupt_protected(int intno, int is_int, int error_code,
/* real mode interrupt */
static void do_interrupt_real(int intno, int is_int, int error_code,
unsigned int next_eip)
unsigned int next_eip)
{
SegmentCache *dt;
uint8_t *ptr, *ssp;
@ -844,6 +824,27 @@ void do_interrupt_user(int intno, int is_int, int error_code,
void do_interrupt(int intno, int is_int, int error_code,
unsigned int next_eip, int is_hw)
{
#ifdef DEBUG_PCALL
if (loglevel) {
static int count;
fprintf(logfile, "%d: interrupt: vector=%02x error_code=%04x int=%d\n",
count, intno, error_code, is_int);
cpu_x86_dump_state(env, logfile, X86_DUMP_CCOP);
#if 0
{
int i;
uint8_t *ptr;
printf(" code=");
ptr = env->segs[R_CS].base + env->eip;
for(i = 0; i < 16; i++) {
printf(" %02x", ldub(ptr + i));
}
printf("\n");
}
#endif
count++;
}
#endif
if (env->cr[0] & CR0_PE_MASK) {
do_interrupt_protected(intno, is_int, error_code, next_eip, is_hw);
} else {
@ -1293,6 +1294,7 @@ void helper_lcall_protected_T0_T1(int shift, int next_eip)
if (loglevel) {
fprintf(logfile, "lcall %04x:%08x\n",
new_cs, new_eip);
cpu_x86_dump_state(env, logfile, X86_DUMP_CCOP);
}
#endif
if ((new_cs & 0xfffc) == 0)
@ -1493,13 +1495,13 @@ void helper_iret_real(int shift)
POPW(ssp, sp, sp_mask, new_cs);
POPW(ssp, sp, sp_mask, new_eflags);
}
ESP = (ESP & ~sp_mask) | (sp & 0xffff);
ESP = (ESP & ~sp_mask) | (sp & sp_mask);
load_seg_vm(R_CS, new_cs);
env->eip = new_eip;
if (env->eflags & VM_MASK)
eflags_mask = FL_UPDATE_MASK32 | IF_MASK | RF_MASK;
eflags_mask = TF_MASK | AC_MASK | ID_MASK | IF_MASK | RF_MASK;
else
eflags_mask = FL_UPDATE_CPL0_MASK;
eflags_mask = TF_MASK | AC_MASK | ID_MASK | IF_MASK | IOPL_MASK | RF_MASK;
if (shift == 0)
eflags_mask &= 0xffff;
load_eflags(new_eflags, eflags_mask);
@ -1511,7 +1513,7 @@ static inline void helper_ret_protected(int shift, int is_iret, int addend)
uint32_t sp, new_cs, new_eip, new_eflags, new_esp, new_ss, sp_mask;
uint32_t new_es, new_ds, new_fs, new_gs;
uint32_t e1, e2, ss_e1, ss_e2;
int cpl, dpl, rpl, eflags_mask;
int cpl, dpl, rpl, eflags_mask, iopl;
uint8_t *ssp;
sp_mask = get_sp_mask(env->segs[R_SS].flags);
@ -1536,8 +1538,9 @@ static inline void helper_ret_protected(int shift, int is_iret, int addend)
}
#ifdef DEBUG_PCALL
if (loglevel) {
fprintf(logfile, "lret new %04x:%08x\n",
new_cs, new_eip);
fprintf(logfile, "lret new %04x:%08x addend=0x%x\n",
new_cs, new_eip, addend);
cpu_x86_dump_state(env, logfile, X86_DUMP_CCOP);
}
#endif
if ((new_cs & 0xfffc) == 0)
@ -1611,11 +1614,13 @@ static inline void helper_ret_protected(int shift, int is_iret, int addend)
ESP = (ESP & ~sp_mask) | (sp & sp_mask);
env->eip = new_eip;
if (is_iret) {
/* NOTE: 'cpl' can be different from the current CPL */
/* NOTE: 'cpl' is the _old_ CPL */
eflags_mask = TF_MASK | AC_MASK | ID_MASK | RF_MASK;
if (cpl == 0)
eflags_mask = FL_UPDATE_CPL0_MASK;
else
eflags_mask = FL_UPDATE_MASK32;
eflags_mask |= IOPL_MASK;
iopl = (env->eflags >> IOPL_SHIFT) & 3;
if (cpl <= iopl)
eflags_mask |= IF_MASK;
if (shift == 0)
eflags_mask &= 0xffff;
load_eflags(new_eflags, eflags_mask);
@ -1631,7 +1636,8 @@ static inline void helper_ret_protected(int shift, int is_iret, int addend)
POPL(ssp, sp, sp_mask, new_gs);
/* modify processor state */
load_eflags(new_eflags, FL_UPDATE_CPL0_MASK | VM_MASK | VIF_MASK | VIP_MASK);
load_eflags(new_eflags, TF_MASK | AC_MASK | ID_MASK |
IF_MASK | IOPL_MASK | VM_MASK | VIF_MASK | VIP_MASK);
load_seg_vm(R_CS, new_cs & 0xffff);
cpu_x86_set_cpl(env, 3);
load_seg_vm(R_SS, new_ss & 0xffff);

32
target-i386/op.c
View File

@ -1138,38 +1138,36 @@ void OPPROTO op_set_cc_op(void)
CC_OP = PARAM1;
}
#define FL_UPDATE_MASK16 (FL_UPDATE_MASK32 & 0xffff)
/* XXX: clear VIF/VIP in all ops ? */
void OPPROTO op_movl_eflags_T0(void)
{
int eflags;
eflags = T0;
CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
DF = 1 - (2 * ((eflags >> 10) & 1));
/* we also update some system flags as in user mode */
env->eflags = (env->eflags & ~FL_UPDATE_MASK32) |
(eflags & FL_UPDATE_MASK32);
load_eflags(T0, (TF_MASK | AC_MASK | ID_MASK));
}
void OPPROTO op_movw_eflags_T0(void)
{
int eflags;
eflags = T0;
CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
DF = 1 - (2 * ((eflags >> 10) & 1));
/* we also update some system flags as in user mode */
env->eflags = (env->eflags & ~FL_UPDATE_MASK16) |
(eflags & FL_UPDATE_MASK16);
load_eflags(T0, (TF_MASK | AC_MASK | ID_MASK) & 0xffff);
}
void OPPROTO op_movl_eflags_T0_io(void)
{
load_eflags(T0, (TF_MASK | AC_MASK | ID_MASK | IF_MASK));
}
void OPPROTO op_movw_eflags_T0_io(void)
{
load_eflags(T0, (TF_MASK | AC_MASK | ID_MASK | IF_MASK) & 0xffff);
}
void OPPROTO op_movl_eflags_T0_cpl0(void)
{
load_eflags(T0, FL_UPDATE_CPL0_MASK);
load_eflags(T0, (TF_MASK | AC_MASK | ID_MASK | IF_MASK | IOPL_MASK));
}
void OPPROTO op_movw_eflags_T0_cpl0(void)
{
load_eflags(T0, FL_UPDATE_CPL0_MASK & 0xffff);
load_eflags(T0, (TF_MASK | AC_MASK | ID_MASK | IF_MASK | IOPL_MASK) & 0xffff);
}
#if 0

18
target-i386/translate.c
View File

@ -3540,10 +3540,18 @@ static uint8_t *disas_insn(DisasContext *s, uint8_t *pc_start)
gen_op_movw_eflags_T0_cpl0();
}
} else {
if (s->dflag) {
gen_op_movl_eflags_T0();
if (s->cpl <= s->iopl) {
if (s->dflag) {
gen_op_movl_eflags_T0_io();
} else {
gen_op_movw_eflags_T0_io();
}
} else {
gen_op_movw_eflags_T0();
if (s->dflag) {
gen_op_movl_eflags_T0();
} else {
gen_op_movw_eflags_T0();
}
}
}
gen_pop_update(s);
@ -4265,6 +4273,10 @@ static uint16_t opc_write_flags[NB_OPS] = {
[INDEX_op_movb_eflags_T0] = CC_S | CC_Z | CC_A | CC_P | CC_C,
[INDEX_op_movw_eflags_T0] = CC_OSZAPC,
[INDEX_op_movl_eflags_T0] = CC_OSZAPC,
[INDEX_op_movw_eflags_T0_io] = CC_OSZAPC,
[INDEX_op_movl_eflags_T0_io] = CC_OSZAPC,
[INDEX_op_movw_eflags_T0_cpl0] = CC_OSZAPC,
[INDEX_op_movl_eflags_T0_cpl0] = CC_OSZAPC,
[INDEX_op_clc] = CC_C,
[INDEX_op_stc] = CC_C,
[INDEX_op_cmc] = CC_C,