From: zhizhou <[email protected]> This patch is based on the implementation of arm. The generic current_pt_regs is implemented with current->stack. It need to access memory that would be too expensive.
Signed-off-by: zhizhou <[email protected]> --- arch/arm64/include/asm/ptrace.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm64/include/asm/ptrace.h b/arch/arm64/include/asm/ptrace.h index e9e5467..1865d54 100644 --- a/arch/arm64/include/asm/ptrace.h +++ b/arch/arm64/include/asm/ptrace.h @@ -185,5 +185,9 @@ static inline int valid_user_regs(struct user_pt_regs *regs) extern unsigned long profile_pc(struct pt_regs *regs); +#define current_pt_regs(void) ({ (struct pt_regs *) \ + ((current_stack_pointer | (THREAD_SIZE - 1)) - 0xf) - 1; \ +}) + #endif /* __ASSEMBLY__ */ #endif -- 2.5.0
