On Sun, Jan 21, 2024 at 8:03 PM Hongtao Liu wrote:
>
> On Sat, Jan 20, 2024 at 10:30 PM H.J. Lu wrote:
> >
> > When an interrupt handler is implemented by an assembly stub which does:
> >
> > 1. Save all registers.
> > 2. Call a C function.
> > 3. Restore all registers.
> > 4. Return from interru
On Sat, Jan 20, 2024 at 10:30 PM H.J. Lu wrote:
>
> When an interrupt handler is implemented by an assembly stub which does:
>
> 1. Save all registers.
> 2. Call a C function.
> 3. Restore all registers.
> 4. Return from interrupt.
>
> it is completely unnecessary to save and restore any registers
When an interrupt handler is implemented by an assembly stub which does:
1. Save all registers.
2. Call a C function.
3. Restore all registers.
4. Return from interrupt.
it is completely unnecessary to save and restore any registers in the C
function called by the assembly stub, even if they woul
