1 files changed, 47 insertions, 5 deletions

diff --git a/arch/arm64/include/asm/ptrace.h b/arch/arm64/include/asm/ptrace.h
index 61dcc3fdbcd..bf326e33ae5 100644
--- a/arch/arm64/include/asm/ptrace.h
+++ b/arch/arm64/include/asm/ptrace.h
@@ -145,8 +145,28 @@ struct pt_regs {
 #define fast_interrupts_enabled(regs) \
 	(!((regs)->pstate & PSR_F_BIT))
 
-#define user_stack_pointer(regs) \
-	(!compat_user_mode(regs) ? (regs)->sp : (regs)->compat_sp)
+/**
+ * regs_get_register() - get register value from its offset
+ * @regs:	   pt_regs from which register value is gotten
+ * @offset:    offset number of the register.
+ *
+ * regs_get_register returns the value of a register whose offset from @regs.
+ * The @offset is the offset of the register in struct pt_regs.
+ * If @offset is bigger than MAX_REG_OFFSET, this returns 0.
+ */
+static inline u64 regs_get_register(struct pt_regs *regs,
+					      unsigned int offset)
+{
+	if (unlikely(offset > MAX_REG_OFFSET))
+		return 0;
+	return *(u64 *)((u64)regs + offset);
+}
+
+/* Valid only for Kernel mode traps. */
+static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
+{
+	return regs->ARM_sp;
+}
 
 static inline unsigned long regs_return_value(struct pt_regs *regs)
 {
@@ -187,13 +207,35 @@ static inline int valid_user_regs(struct user_pt_regs *regs)
 	return 0;
 }
 
-#define instruction_pointer(regs)	((regs)->pc)
+#define GET_USP(regs) \
+	(!compat_user_mode(regs) ? (regs)->sp : (regs)->compat_sp)
+
+#define SET_USP(regs, val)				\
+	do {						\
+		if (compat_user_mode(regs))		\
+			(regs)->compat_sp = val;	\
+		else					\
+			(regs)->sp = val;		\
+	} while (0)
+
+#define GET_FP(regs) \
+	(!compat_user_mode(regs) ? (regs)->regs[29] : (regs)->compat_fp)
+
+#define SET_FP(regs, val)				\
+	do {						\
+		if (compat_user_mode(regs))		\
+			(regs)->compat_fp = val;	\
+		else					\
+			(regs)->regs[29] = val;		\
+	} while (0)
+
+#include <asm-generic/ptrace.h>
+
 #define stack_pointer(regs)		((regs)->sp)
 
 #ifdef CONFIG_SMP
+#undef profile_pc
 extern unsigned long profile_pc(struct pt_regs *regs);
-#else
-#define profile_pc(regs) instruction_pointer(regs)
 #endif
 
 #endif /* __ASSEMBLY__ */