1 files changed, 29 insertions, 5 deletions

diff --git a/arch/x86/include/asm/stacktrace.h b/arch/x86/include/asm/stacktrace.h
index 2b16a2ad23dc..70bbe39043a9 100644
--- a/arch/x86/include/asm/stacktrace.h
+++ b/arch/x86/include/asm/stacktrace.h
@@ -7,6 +7,7 @@
 #define _ASM_X86_STACKTRACE_H
 
 #include <linux/uaccess.h>
+#include <linux/ptrace.h>
 
 extern int kstack_depth_to_print;
 
@@ -36,9 +37,6 @@ print_context_stack_bp(struct thread_info *tinfo,
 /* Generic stack tracer with callbacks */
 
 struct stacktrace_ops {
-        void (*warning)(void *data, char *msg);
-        /* msg must contain %s for the symbol */
-        void (*warning_symbol)(void *data, char *msg, unsigned long symbol);
         void (*address)(void *data, unsigned long address, int reliable);
         /* On negative return stop dumping */
         int (*stack)(void *data, char *name);
@@ -57,13 +55,39 @@ void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
 #define get_bp(bp) asm("movq %%rbp, %0" : "=r" (bp) :)
 #endif
 
+#ifdef CONFIG_FRAME_POINTER
+static inline unsigned long
+stack_frame(struct task_struct *task, struct pt_regs *regs)
+{
+        unsigned long bp;
+
+        if (regs)
+                return regs->bp;
+
+        if (task == current) {
+                /* Grab bp right from our regs */
+                get_bp(bp);
+                return bp;
+        }
+
+        /* bp is the last reg pushed by switch_to */
+        return *(unsigned long *)task->thread.sp;
+}
+#else
+static inline unsigned long
+stack_frame(struct task_struct *task, struct pt_regs *regs)
+{
+        return 0;
+}
+#endif
+
 extern void
 show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
-                unsigned long *stack, unsigned long bp, char *log_lvl);
+                   unsigned long *stack, unsigned long bp, char *log_lvl);
 
 extern void
 show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
-                unsigned long *sp, unsigned long bp, char *log_lvl);
+                   unsigned long *sp, unsigned long bp, char *log_lvl);
 
 extern unsigned int code_bytes;