parisc: add CALLER_ADDR{0-6} macros

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>

diff --git a/arch/parisc/include/asm/ftrace.h b/arch/parisc/include/asm/ftrace.h
index 2fa05dd6aeeeee2c9ca56c772754b8e2dee30627..72c0fafaa039e910999f16b46c96226e991f3724 100644 (file)
--- a/arch/parisc/include/asm/ftrace.h
+++ b/arch/parisc/include/asm/ftrace.h
@@ -20,6 +20,20 @@ struct ftrace_ret_stack {
  * Defined in entry.S
  */
 extern void return_to_handler(void);
+
+
+extern unsigned long return_address(unsigned int);
+
+#define HAVE_ARCH_CALLER_ADDR
+
+#define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
+#define CALLER_ADDR1 return_address(1)
+#define CALLER_ADDR2 return_address(2)
+#define CALLER_ADDR3 return_address(3)
+#define CALLER_ADDR4 return_address(4)
+#define CALLER_ADDR5 return_address(5)
+#define CALLER_ADDR6 return_address(6)
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* _ASM_PARISC_FTRACE_H */

diff --git a/arch/parisc/kernel/unwind.c b/arch/parisc/kernel/unwind.c
index a36799e85693d7b30d7a9acf1f2703709ad77bcb..f03f6fb0ec839ca36f1ccdd4079226760dbdcd96 100644 (file)
--- a/arch/parisc/kernel/unwind.c
+++ b/arch/parisc/kernel/unwind.c
@@ -417,3 +417,30 @@ int unwind_to_user(struct unwind_frame_info *info)
 
        return ret;
 }
+
+unsigned long return_address(unsigned int level)
+{
+       struct unwind_frame_info info;
+       struct pt_regs r;
+       unsigned long sp;
+
+       /* initialize unwind info */
+       asm volatile ("copy %%r30, %0" : "=r"(sp));
+       memset(&r, 0, sizeof(struct pt_regs));
+       r.iaoq[0] = (unsigned long) current_text_addr();
+       r.gr[2] = (unsigned long) __builtin_return_address(0);
+       r.gr[30] = sp;
+       unwind_frame_init(&info, current, &r);
+
+       /* unwind stack */
+       ++level;
+       do {
+               if (unwind_once(&info) < 0 || info.ip == 0)
+                       return 0;
+               if (!__kernel_text_address(info.ip)) {
+                       return 0;
+               }
+       } while (info.ip && level--);
+
+       return info.ip;
+}