Hello
On Mon, May 11, 2020 at 10:35 PM Thomas Gleixner wrote:
>
> Lai,
>
> Lai Jiangshan writes:
> > On Tue, May 5, 2020 at 10:23 PM Thomas Gleixner wrote:
> >> +SYM_CODE_START(irq_entries_start)
> >> +vector=FIRST_EXTERNAL_VECTOR
> >> +.rept (FIRST_SYSTEM_VECTOR - FIRST_EXTERNAL_VECTOR
Lai,
Lai Jiangshan writes:
> On Tue, May 5, 2020 at 10:23 PM Thomas Gleixner wrote:
>> +SYM_CODE_START(irq_entries_start)
>> +vector=FIRST_EXTERNAL_VECTOR
>> +.rept (FIRST_SYSTEM_VECTOR - FIRST_EXTERNAL_VECTOR)
>> + UNWIND_HINT_IRET_REGS
>> + .byte 0x6a, vector
>> + j
On Tue, May 5, 2020 at 10:23 PM Thomas Gleixner wrote:
> +/*
> + * ASM code to emit the common vector entry stubs where each stub is
> + * packed into 8 bytes.
> + *
> + * Note, that the 'pushq imm8' is emitted via '.byte 0x6a, vector' because
> + * GCC treats the local vector variable as unsigne
Device interrupts which go through do_IRQ() or the spurious interrupt
handler have their separate entry code on 64 bit for no good reason.
Both 32 and 64 bit transport the vector number through ORIG_[RE]AX in
pt_regs. Further the vector number is forced to fit into an u8 and is
complemented and of
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