On 07/15/2016 06:57 AM, Catalin Marinas wrote:
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.
It's referenced in kernel/trace/trace_probe.c.
+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?
OK.
Thanks,
-dl
