On Fri, Jan 29, 2021 at 12:35:07PM +0800, Huang Pei wrote:
> MIPS always save kernel stack pointer in regs[29]
>
> Signed-off-by: Huang Pei <huangpei@xxxxxxxxxxx>
> ---
> arch/mips/include/asm/ptrace.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/mips/include/asm/ptrace.h b/arch/mips/include/asm/ptrace.h
> index 1e76774b36dd..daf3cf244ea9 100644
> --- a/arch/mips/include/asm/ptrace.h
> +++ b/arch/mips/include/asm/ptrace.h
> @@ -53,7 +53,7 @@ struct pt_regs {
>
> static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
> {
> - return regs->regs[31];
> + return regs->regs[29];
hmm, I'm still wondering where the trick is... looks like this is used
for uprobes, so nobody has ever used uprobes or I'm missing something.
How did you find that ?
Thomas.
--
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea. [ RFC1925, 2.3 ]
