sh: provide user_stack_pointer(), needed for tracehook support.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/include/asm/processor_32.h

@@ -199,6 +199,8 @@ extern unsigned long get_wchan(struct task_struct *p);
 #define KSTK_EIP(tsk)  (task_pt_regs(tsk)->pc)
 #define KSTK_ESP(tsk)  (task_pt_regs(tsk)->regs[15])
 
+#define user_stack_pointer(regs)	((regs)->regs[15])
+
 #define cpu_sleep()	__asm__ __volatile__ ("sleep" : : : "memory")
 #define cpu_relax()	barrier()
 

arch/sh/include/asm/processor_64.h

@@ -267,6 +267,8 @@ extern unsigned long get_wchan(struct task_struct *p);
 #define KSTK_EIP(tsk)  ((tsk)->thread.pc)
 #define KSTK_ESP(tsk)  ((tsk)->thread.sp)
 
+#define user_stack_pointer(regs)	((regs)->sp)
+
 #define cpu_relax()	barrier()
 
 #endif	/* __ASSEMBLY__ */