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SubjectRe: [PATCH v15 01/10] arm64: Add HAVE_REGS_AND_STACK_ACCESS_API feature
On Fri, Jul 08, 2016 at 12:35:45PM -0400, David Long wrote:
> --- a/arch/arm64/include/asm/ptrace.h
> +++ b/arch/arm64/include/asm/ptrace.h
> @@ -74,6 +74,7 @@
> #define COMPAT_PT_DATA_ADDR 0x10004
> #define COMPAT_PT_TEXT_END_ADDR 0x10008
> #ifndef __ASSEMBLY__
> +#include <linux/bug.h>
>
> /* sizeof(struct user) for AArch32 */
> #define COMPAT_USER_SZ 296
> @@ -119,6 +120,8 @@ struct pt_regs {
> u64 syscallno;
> };
>
> +#define MAX_REG_OFFSET offsetof(struct pt_regs, pstate)
> +
> #define arch_has_single_step() (1)
>
> #ifdef CONFIG_COMPAT
> @@ -147,6 +150,55 @@ struct pt_regs {
> #define user_stack_pointer(regs) \
> (!compat_user_mode(regs) ? (regs)->sp : (regs)->compat_sp)
>
> +extern int regs_query_register_offset(const char *name);
> +extern const char *regs_query_register_name(unsigned int offset);

Is regs_query_register_offset() used anywhere? I grep'ed the kernel with
these patches applied but couldn't find any use.

> +extern bool regs_within_kernel_stack(struct pt_regs *regs, unsigned long addr);

This one only seems to be used in arch/arm64/kernel/ptrace.c. Can we
make it static and remove the declaration?

--
Catalin

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