2007/12/5, Justin Ferguson <jnferguson@xxxxxxxxx>:
> I'm not going to sit and debug your asm, but you're doing something
> wrong because this works.
>
> Here's some 32-bit functions I wrote a while back for a project, it
> should help you figure out whats going on.
>
>
> void
> unsetTF(void)
> {
> __asm__ __volatile__(
> "pushf \n"
> "mov $0x100, %eax \n"
> "not %eax \n"
> "andl (%esp), %eax \n"
> "popf \n"
> );
> }
>
> void
> setTF(void)
> {
> __asm__ __volatile__(
> "pushf \n"
> "orl $0x100, (%esp) \n"
> "popf "
> );
>
> return;
> }
>
> unsigned int
> isTFset(void)
> {
> unsigned int retval;
>
> __asm__ __volatile__(
> "xor %%eax, %%eax \n"
> "pushf \n"
> "pop %%eax \n"
> "and $0x100, %%eax \n"
> : "=a" (retval)
> );
>
> return retval;
>
> }
The question is another, i'm sure that TF is set, i don't know why my
handler is not caught after TF set.
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