Changeset fd608dc in mainline for kernel/arch/arm32/src/debug/stacktrace.c

Timestamp:

2010-01-13T17:52:13Z (15 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

65737d4, 990c70e

Parents:

439ba77 (diff), 15817089 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge the stacktrace branch.

This merge introduces support for kernel stack traces on arm32.

File:

• kernel/arch/arm32/src/debug/stacktrace.c (modified) (1 diff)

kernel/arch/arm32/src/debug/stacktrace.c

@@ -38 +38 @@
 #include <typedefs.h>
 
+#define FRAME_OFFSET_FP_PREV    -3
+#define FRAME_OFFSET_RA         -1
+
 bool kernel_frame_pointer_validate(uintptr_t fp)
 {
-        return false;
+        return fp != 0;
 }
 
 bool kernel_frame_pointer_prev(uintptr_t fp, uintptr_t *prev)
 {
-        return false;
+        uint32_t *stack = (void *) fp;
+
+        *prev = stack[FRAME_OFFSET_FP_PREV];
+        return true;
 }
 
 bool kernel_return_address_get(uintptr_t fp, uintptr_t *ra)
 {
-        return false;
+        uint32_t *stack = (void *) fp;
+
+        *ra = stack[FRAME_OFFSET_RA];
+        return true;
 }
 
 bool uspace_frame_pointer_validate(uintptr_t fp)
 {
-        return false;
+        return fp != 0;
 }
 
 bool uspace_frame_pointer_prev(uintptr_t fp, uintptr_t *prev)
 {
-        return false;
+        return !copy_from_uspace((void *) prev,
+            (uint32_t *) fp + FRAME_OFFSET_FP_PREV, sizeof(*prev));
 }
 
 bool uspace_return_address_get(uintptr_t fp, uintptr_t *ra)
 {
-        return false;
+        return !copy_from_uspace((void *) ra, (uint32_t *) fp + FRAME_OFFSET_RA,
+            sizeof(*ra));
 }