Re: [PATCH] MIPS: fix kernel_stack_pointer()
From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Date: 2021-02-01 12:24:12
Also in:
linux-mips, linux-mm
On Fri, Jan 29, 2021 at 12:35:07PM +0800, Huang Pei wrote:
quoted hunk ↗ jump to hunk
MIPS always save kernel stack pointer in regs[29] Signed-off-by: Huang Pei <redacted> --- 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 ]