Index: kernel/arch/ppc32/src/debug/stacktrace.c
===================================================================
--- kernel/arch/ppc32/src/debug/stacktrace.c	(revision 4872160f9c176d257f1757469d1adec8033d95f9)
+++ kernel/arch/ppc32/src/debug/stacktrace.c	(revision 7de7cdecfd35be40f3afd79cf10c784b47fad3e9)
@@ -37,22 +37,29 @@
 #include <typedefs.h>
 
+#define FRAME_OFFSET_FP_PREV  0
+#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;
 }
 
Index: kernel/arch/ppc32/src/debug/stacktrace_asm.S
===================================================================
--- kernel/arch/ppc32/src/debug/stacktrace_asm.S	(revision 4872160f9c176d257f1757469d1adec8033d95f9)
+++ kernel/arch/ppc32/src/debug/stacktrace_asm.S	(revision 7de7cdecfd35be40f3afd79cf10c784b47fad3e9)
@@ -27,4 +27,6 @@
 #
 
+#include <arch/asm/regname.h>
+
 .text
 
@@ -33,6 +35,8 @@
 
 frame_pointer_get:
+	mr r3, sp
 	blr
 
 program_counter_get:
+	mflr r3
 	blr