1 files changed, 59 insertions, 2 deletions

diff --git a/arch/arm64/include/asm/ptrace.h b/arch/arm64/include/asm/ptrace.h
index 7f94755089e2..1528d52eb8c0 100644
--- a/arch/arm64/include/asm/ptrace.h
+++ b/arch/arm64/include/asm/ptrace.h
@@ -121,6 +121,8 @@ struct pt_regs {
 	u64 unused;	// maintain 16 byte alignment
 };
 
+#define MAX_REG_OFFSET offsetof(struct pt_regs, pstate)
+
 #define arch_has_single_step()	(1)
 
 #ifdef CONFIG_COMPAT
@@ -146,9 +148,57 @@ struct pt_regs {
 #define fast_interrupts_enabled(regs) \
 	(!((regs)->pstate & PSR_F_BIT))
 
-#define user_stack_pointer(regs) \
+#define GET_USP(regs) \
 	(!compat_user_mode(regs) ? (regs)->sp : (regs)->compat_sp)
 
+#define SET_USP(ptregs, value) \
+	(!compat_user_mode(regs) ? ((regs)->sp = value) : ((regs)->compat_sp = value))
+
+extern int regs_query_register_offset(const char *name);
+extern const char *regs_query_register_name(unsigned int offset);
+extern unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
+					       unsigned int n);
+
+/**
+ * regs_get_register() - get register value from its offset
+ * @regs:	pt_regs from which register value is gotten
+ * @offset:	offset 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)
+{
+	u64 val = 0;
+
+	offset >>= 3;
+	switch (offset) {
+	case 0 ... 30:
+		val = regs->regs[offset];
+		break;
+	case offsetof(struct pt_regs, sp) >> 3:
+		val = regs->sp;
+		break;
+	case offsetof(struct pt_regs, pc) >> 3:
+		val = regs->pc;
+		break;
+	case offsetof(struct pt_regs, pstate) >> 3:
+		val = regs->pstate;
+		break;
+	default:
+		val = 0;
+	}
+
+	return val;
+}
+
+/* Valid only for Kernel mode traps. */
+static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
+{
+	return regs->sp;
+}
+
 static inline unsigned long regs_return_value(struct pt_regs *regs)
 {
 	return regs->regs[0];
@@ -158,8 +208,15 @@ static inline unsigned long regs_return_value(struct pt_regs *regs)
 struct task_struct;
 int valid_user_regs(struct user_pt_regs *regs, struct task_struct *task);
 
-#define instruction_pointer(regs)	((unsigned long)(regs)->pc)
+#define GET_IP(regs)		((unsigned long)(regs)->pc)
+#define SET_IP(regs, value)	((regs)->pc = ((u64) (value)))
+
+#define GET_FP(ptregs)		((unsigned long)(ptregs)->regs[29])
+#define SET_FP(ptregs, value)	((ptregs)->regs[29] = ((u64) (value)))
+
+#include <asm-generic/ptrace.h>
 
+#undef profile_pc
 extern unsigned long profile_pc(struct pt_regs *regs);
 
 #endif /* __ASSEMBLY__ */