sparc: Add user_stack_pointer().

Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/sparc/include/asm/ptrace_32.h

@@ -74,6 +74,7 @@ struct sparc_stackf {
 
 #define user_mode(regs) (!((regs)->psr & PSR_PS))
 #define instruction_pointer(regs) ((regs)->pc)
+#define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
 unsigned long profile_pc(struct pt_regs *);
 extern void show_regs(struct pt_regs *);
 #endif

arch/sparc/include/asm/ptrace_64.h

@@ -146,6 +146,7 @@ do {	current_thread_info()->syscall_noerror = 1; \
 } while (0)
 #define user_mode(regs) (!((regs)->tstate & TSTATE_PRIV))
 #define instruction_pointer(regs) ((regs)->tpc)
+#define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
 #define regs_return_value(regs) ((regs)->u_regs[UREG_I0])
 #ifdef CONFIG_SMP
 extern unsigned long profile_pc(struct pt_regs *);