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call gate fix - verr and verw fix

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@459 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2003-11-13 23:15:36 +00:00
parent 77729c2445
commit f3f2d9be03
1 changed files with 43 additions and 5 deletions
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48
target-i386/helper.c
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@ -19,6 +19,8 @@
*/
#include "exec.h"
//#define DEBUG_PCALL
const uint8_t parity_table[256] = {
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
@ -540,6 +542,27 @@ static void do_interrupt_protected(int intno, int is_int, int error_code,
uint32_t e1, e2, offset, ss, esp, ss_e1, ss_e2, push_size;
uint32_t old_cs, old_ss, old_esp, 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) {
@ -1260,11 +1283,22 @@ void helper_lcall_protected_T0_T1(int shift, int next_eip)
new_cs = T0;
new_eip = T1;
#ifdef DEBUG_PCALL
if (loglevel) {
fprintf(logfile, "lcall %04x:%08x\n",
new_cs, new_eip);
}
#endif
if ((new_cs & 0xfffc) == 0)
raise_exception_err(EXCP0D_GPF, 0);
if (load_segment(&e1, &e2, new_cs) != 0)
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
cpl = env->hflags & HF_CPL_MASK;
#ifdef DEBUG_PCALL
if (loglevel) {
fprintf(logfile, "desc=%08x:%08x\n", e1, e2);
}
#endif
if (e2 & DESC_S_MASK) {
if (!(e2 & DESC_CS_MASK))
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
@ -1341,6 +1375,7 @@ void helper_lcall_protected_T0_T1(int shift, int next_eip)
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
selector = e1 >> 16;
offset = (e2 & 0xffff0000) | (e1 & 0x0000ffff);
param_count = e2 & 0x1f;
if ((selector & 0xfffc) == 0)
raise_exception_err(EXCP0D_GPF, 0);
@ -1357,6 +1392,11 @@ void helper_lcall_protected_T0_T1(int shift, int next_eip)
if (!(e2 & DESC_C_MASK) && dpl < cpl) {
/* to inner priviledge */
get_ss_esp_from_tss(&ss, &sp, dpl);
#ifdef DEBUG_PCALL
if (loglevel)
fprintf(logfile, "ss=%04x sp=%04x param_count=%d ESP=%x\n",
ss, sp, param_count, ESP);
#endif
if ((ss & 0xfffc) == 0)
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
if ((ss & 3) != dpl)
@ -1373,7 +1413,6 @@ void helper_lcall_protected_T0_T1(int shift, int next_eip)
if (!(ss_e2 & DESC_P_MASK))
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
param_count = e2 & 0x1f;
push_size = ((param_count * 2) + 8) << shift;
old_esp = ESP;
@ -1389,7 +1428,7 @@ void helper_lcall_protected_T0_T1(int shift, int next_eip)
get_seg_limit(ss_e1, ss_e2),
ss_e2);
if (!(env->segs[R_SS].flags & DESC_B_MASK))
if (!(ss_e2 & DESC_B_MASK))
sp &= 0xffff;
ssp = env->segs[R_SS].base + sp;
if (shift) {
@ -1441,7 +1480,6 @@ void helper_lcall_protected_T0_T1(int shift, int next_eip)
e2);
cpu_x86_set_cpl(env, dpl);
/* from this point, not restartable if same priviledge */
if (!(env->segs[R_SS].flags & DESC_B_MASK))
ESP = (ESP & 0xffff0000) | (sp & 0xffff);
else
@ -1838,7 +1876,7 @@ void helper_verr(void)
if (dpl < cpl || dpl < rpl)
return;
}
/* ok */
CC_SRC |= CC_Z;
}
void helper_verw(void)
@ -1866,7 +1904,7 @@ void helper_verw(void)
if (!(e2 & DESC_W_MASK))
return;
}
/* ok */
CC_SRC |= CC_Z;
}
/* FPU helpers */