Changes in kernel/arch/sparc64/src/debug/stacktrace.c [d99c1d2:819a768] in mainline

File:

• kernel/arch/sparc64/src/debug/stacktrace.c (modified) (1 diff)

kernel/arch/sparc64/src/debug/stacktrace.c

@@ -37 +37 @@
 #include <typedefs.h>
 
+#include <arch.h>
+#include <arch/stack.h>
+#include <arch/trap/trap_table.h>
+
+#if defined(SUN4V)
+#include <arch/sun4v/arch.h>
+#endif
+
+#define FRAME_OFFSET_FP_PREV    14
+#define FRAME_OFFSET_RA         15
+
+extern void alloc_window_and_flush(void);
+
 bool kernel_frame_pointer_validate(uintptr_t fp)
 {
-        return false;
+        uintptr_t kstack;
+        
+#if defined(SUN4U)
+        kstack = read_from_ag_g6();
+#elif defined(SUN4V)
+        kstack = asi_u64_read(ASI_SCRATCHPAD, SCRATCHPAD_KSTACK);
+#endif
+
+        kstack += STACK_BIAS;
+        kstack -= PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE;
+
+        if (THREAD && (fp == kstack))
+                return false;
+        return fp != 0;
 }
 
 bool kernel_frame_pointer_prev(uintptr_t fp, uintptr_t *prev)
 {
-        return false;
+        uint64_t *stack = (void *) fp;
+        alloc_window_and_flush();
+        *prev = stack[FRAME_OFFSET_FP_PREV] + STACK_BIAS;
+        return true;
 }
 
 bool kernel_return_address_get(uintptr_t fp, uintptr_t *ra)
 {
-        return false;
+        uint64_t *stack = (void *) fp;
+        alloc_window_and_flush();
+        *ra = stack[FRAME_OFFSET_RA];
+        return true;
 }