diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/test-i386.c | 96 |
1 files changed, 93 insertions, 3 deletions
diff --git a/tests/test-i386.c b/tests/test-i386.c index a7ee032c05..3c0a76befd 100644 --- a/tests/test-i386.c +++ b/tests/test-i386.c @@ -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; } |