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ntdll: Add test cases for the direction flag.

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Alexandre Julliard 2008-03-20 12:24:54 +01:00
parent 4ce9af2ba5
commit 902aef85c0
1 changed files with 29 additions and 0 deletions
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29
dlls/ntdll/tests/exception.c
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@ -469,6 +469,30 @@ static DWORD align_check_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_
return ExceptionContinueExecution;
}
/* Test the direction flag handling. */
static const BYTE direction_flag_code[] = {
0x55, /* push %ebp */
0x89,0xe5, /* mov %esp,%ebp */
0xfd, /* std */
0xfa, /* cli - cause exception */
0x5d, /* pop %ebp */
0xc3, /* ret */
};
static DWORD direction_flag_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
{
#ifdef __GNUC__
unsigned int flags;
__asm__("pushfl; popl %0" : "=r" (flags) );
ok( !(flags & 0x400), "eflags has DF bit set\n" );
#endif
ok( context->EFlags & 0x400, "context eflags has DF bit cleared\n" );
got_exception++;
context->Eip++; /* skip cli */
return ExceptionContinueExecution;
}
/* test single stepping over hardware breakpoint */
static DWORD bpx_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
@ -560,6 +584,11 @@ static void test_exceptions(void)
run_exception_test(align_check_handler, NULL, align_check_code, sizeof(align_check_code));
ok(got_exception == 0, "got %d alignment faults, expected 0\n", got_exception);
/* test direction flag */
got_exception = 0;
run_exception_test(direction_flag_handler, NULL, direction_flag_code, sizeof(direction_flag_code));
ok(got_exception == 1, "got %d exceptions, expected 1\n", got_exception);
/* test single stepping over hardware breakpoint */
memset(&ctx, 0, sizeof(ctx));
ctx.Dr0 = (DWORD) code_mem; /* set hw bp on first nop */