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ntdll: Added debug registers test case.

This commit is contained in:
Marcus Meissner 2006-09-30 15:09:55 +02:00 committed by Alexandre Julliard
parent f71dd47b42
commit 3a6d53e5d0
1 changed files with 55 additions and 0 deletions
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55
dlls/ntdll/tests/exception.c
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@ -37,6 +37,7 @@
#ifdef __i386__
static struct _TEB * (WINAPI *pNtCurrentTeb)(void);
static NTSTATUS (WINAPI *pNtGetContextThread)(HANDLE,CONTEXT*);
/* Test various instruction combinations that cause a protection fault on the i386,
* and check what the resulting exception looks like.
@ -227,11 +228,65 @@ static void test_prot_fault(void)
pNtCurrentTeb()->Tib.ExceptionList = exc_frame.frame.Prev;
}
static DWORD dreg_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
{
context->Eip += 2; /* Skips the popl (%eax) */
context->Dr0 = 0;
context->Dr1 = 0;
context->Dr2 = 0;
context->Dr3 = 0;
context->Dr6 = 0;
context->Dr7 = 0x155;
return ExceptionContinueExecution;
}
static BYTE code[5] = {
0x31, 0xc0, /* xor %eax,%eax */
0x8f, 0x00, /* popl (%eax) - cause exception */
0xc3 /* ret */
};
static void test_debug_regs(void)
{
CONTEXT ctx;
NTSTATUS res;
struct
{
EXCEPTION_REGISTRATION_RECORD frame;
} exc_frame;
void (*func)(void) = (void*)code;
pNtCurrentTeb = (void *)GetProcAddress( GetModuleHandleA("ntdll.dll"), "NtCurrentTeb" );
if (!pNtCurrentTeb)
{
trace( "NtCurrentTeb not found, skipping tests\n" );
return;
}
pNtGetContextThread = (void *)GetProcAddress( GetModuleHandleA("ntdll.dll"), "NtGetContextThread" );
if (!pNtGetContextThread)
{
trace( "NtGetContextThread not found, skipping tests\n" );
return;
}
exc_frame.frame.Handler = dreg_handler;
exc_frame.frame.Prev = pNtCurrentTeb()->Tib.ExceptionList;
pNtCurrentTeb()->Tib.ExceptionList = &exc_frame.frame;
func();
pNtCurrentTeb()->Tib.ExceptionList = exc_frame.frame.Prev;
ctx.ContextFlags = CONTEXT_DEBUG_REGISTERS;
res = pNtGetContextThread(GetCurrentThread(), &ctx);
ok (res == STATUS_SUCCESS,"NtGetContextThread failed with %lx", res);
ok(ctx.Dr7 == 0x155,"failed to set debugregister 7 to 0x155");
}
#endif /* __i386__ */
START_TEST(exception)
{
#ifdef __i386__
test_prot_fault();
test_debug_regs();
#endif
}