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added linux < 2.4.21 vm86 bug workaround - added extensive TF flag test 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@376 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2003-09-17 22:49:51 +00:00
parent b1ba65744e
commit 3ff0631ed9
1 changed files with 93 additions and 3 deletions
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96
tests/test-i386.c
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@ -13,6 +13,7 @@
#define TEST_CMOV 0
#define TEST_FCOMI 0
//#define LINUX_VM86_IOPL_FIX
#define xglue(x, y) x ## y
#define glue(x, y) xglue(x, y)
@ -1106,7 +1107,7 @@ void test_vm86(void)
switch(VM86_TYPE(ret)) {
case VM86_INTx:
{
int int_num, ah;
int int_num, ah, v;
int_num = VM86_ARG(ret);
if (int_num != 0x21)
@ -1134,8 +1135,12 @@ void test_vm86(void)
r->eax = (r->eax & ~0xff) | '$';
}
break;
case 0xff: /* extension: write hex number in edx */
printf("%08x\n", (int)r->edx);
case 0xff: /* extension: write eflags number in edx */
v = (int)r->edx;
#ifndef LINUX_VM86_IOPL_FIX
v &= ~0x3000;
#endif
printf("%08x\n", v);
break;
default:
unknown_int:
@ -1356,6 +1361,90 @@ void test_exceptions(void)
printf("val=0x%x\n", val);
}
/* specific precise single step test */
void sig_trap_handler(int sig, siginfo_t *info, void *puc)
{
struct ucontext *uc = puc;
printf("EIP=0x%08x\n", uc->uc_mcontext.gregs[REG_EIP]);
}
const uint8_t sstep_buf1[4] = { 1, 2, 3, 4};
uint8_t sstep_buf2[4];
void test_single_step(void)
{
struct sigaction act;
volatile int val;
int i;
val = 0;
act.sa_sigaction = sig_trap_handler;
sigemptyset(&act.sa_mask);
act.sa_flags = SA_SIGINFO;
sigaction(SIGTRAP, &act, NULL);
asm volatile ("pushf\n"
"orl $0x00100, (%%esp)\n"
"popf\n"
"movl $0xabcd, %0\n"
/* jmp test */
"movl $3, %%ecx\n"
"1:\n"
"addl $1, %0\n"
"decl %%ecx\n"
"jnz 1b\n"
/* movsb: the single step should stop at each movsb iteration */
"movl $sstep_buf1, %%esi\n"
"movl $sstep_buf2, %%edi\n"
"movl $0, %%ecx\n"
"rep movsb\n"
"movl $3, %%ecx\n"
"rep movsb\n"
"movl $1, %%ecx\n"
"rep movsb\n"
/* cmpsb: the single step should stop at each cmpsb iteration */
"movl $sstep_buf1, %%esi\n"
"movl $sstep_buf2, %%edi\n"
"movl $0, %%ecx\n"
"rep cmpsb\n"
"movl $4, %%ecx\n"
"rep cmpsb\n"
/* getpid() syscall: single step should skip one
instruction */
"movl $20, %%eax\n"
"int $0x80\n"
"movl $0, %%eax\n"
/* when modifying SS, trace is not done on the next
instruction */
"movl %%ss, %%ecx\n"
"movl %%ecx, %%ss\n"
"addl $1, %0\n"
"movl $1, %%eax\n"
"movl %%ecx, %%ss\n"
"jmp 1f\n"
"addl $1, %0\n"
"1:\n"
"movl $1, %%eax\n"
"pushl %%ecx\n"
"popl %%ss\n"
"addl $1, %0\n"
"movl $1, %%eax\n"
"pushf\n"
"andl $~0x00100, (%%esp)\n"
"popf\n"
: "=m" (val)
:
: "cc", "memory", "eax", "ecx", "esi", "edi");
printf("val=%d\n", val);
for(i = 0; i < 4; i++)
printf("sstep_buf2[%d] = %d\n", i, sstep_buf2[i]);
}
/* self modifying code test */
uint8_t code[] = {
0xb8, 0x1, 0x00, 0x00, 0x00, /* movl $1, %eax */
@ -1402,5 +1491,6 @@ int main(int argc, char **argv)
test_vm86();
test_exceptions();
test_self_modifying_code();
test_single_step();
return 0;
}