Index: kernel/arch/ppc32/src/debug/stacktrace.c
===================================================================
--- kernel/arch/ppc32/src/debug/stacktrace.c	(revision da1bafb8cf9a3b3be8ef21bc114daaa476a85190)
+++ kernel/arch/ppc32/src/debug/stacktrace.c	(revision f092718bd8d8ba6c92d58209c22e1b6756b222b5)
@@ -40,38 +40,38 @@
 #define FRAME_OFFSET_RA       1
 
-bool kernel_frame_pointer_validate(uintptr_t fp)
+bool kernel_stack_trace_context_validate(stack_trace_context_t *ctx)
 {
-	return fp != 0;
+	return ctx->fp != 0;
 }
 
-bool kernel_frame_pointer_prev(uintptr_t fp, uintptr_t *prev)
+bool kernel_frame_pointer_prev(stack_trace_context_t *ctx, uintptr_t *prev)
 {
-	uint32_t *stack = (void *) fp;
+	uint32_t *stack = (void *) ctx->fp;
 	*prev = stack[FRAME_OFFSET_FP_PREV];
 	return true;
 }
 
-bool kernel_return_address_get(uintptr_t fp, uintptr_t *ra)
+bool kernel_return_address_get(stack_trace_context_t *ctx, uintptr_t *ra)
 {
-	uint32_t *stack = (void *) fp;
+	uint32_t *stack = (void *) ctx->fp;
 	*ra = stack[FRAME_OFFSET_RA];
 	return true;
 }
 
-bool uspace_frame_pointer_validate(uintptr_t fp)
+bool uspace_stack_trace_context_validate(stack_trace_context_t *ctx)
 {
-	return fp != 0;
+	return ctx->fp != 0;
 }
 
-bool uspace_frame_pointer_prev(uintptr_t fp, uintptr_t *prev)
+bool uspace_frame_pointer_prev(stack_trace_context_t *ctx, uintptr_t *prev)
 {
 	return !copy_from_uspace((void *) prev,
-	    (uint32_t *) fp + FRAME_OFFSET_FP_PREV, sizeof(*prev));
+	    (uint32_t *) ctx->fp + FRAME_OFFSET_FP_PREV, sizeof(*prev));
 }
 
-bool uspace_return_address_get(uintptr_t fp, uintptr_t *ra)
+bool uspace_return_address_get(stack_trace_context_t *ctx, uintptr_t *ra)
 {
-	return !copy_from_uspace((void *) ra, (uint32_t *) fp + FRAME_OFFSET_RA,
-	    sizeof(*ra));
+	return !copy_from_uspace((void *) ra,
+	    (uint32_t *) ctx->fp + FRAME_OFFSET_RA, sizeof(*ra));
 }