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authorHelge Deller <deller@gmx.de>2009-10-25 21:48:36 +0000
committerKyle McMartin <kyle@mcmartin.ca>2009-12-16 03:48:54 +0000
commit11e178091f6a9c5ca479f8a276b9dd0dfacf8fc4 (patch)
tree5f110fc33fd34debd0a072dff7e767143e1ed7db /arch/parisc/kernel/unwind.c
parentb29f90379eb5def21ca3fdf576079c285b815e6a (diff)
downloadleg-kernel-11e178091f6a9c5ca479f8a276b9dd0dfacf8fc4.tar.gz
parisc: add CALLER_ADDR{0-6} macros
Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
Diffstat (limited to 'arch/parisc/kernel/unwind.c')
-rw-r--r--arch/parisc/kernel/unwind.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/parisc/kernel/unwind.c b/arch/parisc/kernel/unwind.c
index a36799e85693..f03f6fb0ec83 100644
--- 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;
+}