x86/dumpstack: Remove dump_trace() and related callbacks

[cascardo/linux.git] / arch / x86 / include / asm / stacktrace.h

diff --git a/arch/x86/include/asm/stacktrace.h b/arch/x86/include/asm/stacktrace.h
index 0944218..37f2e0b 100644 (file)
--- a/arch/x86/include/asm/stacktrace.h
+++ b/arch/x86/include/asm/stacktrace.h
@@ -8,86 +8,86 @@
 
 #include <linux/uaccess.h>
 #include <linux/ptrace.h>
+#include <asm/switch_to.h>
+
+enum stack_type {
+       STACK_TYPE_UNKNOWN,
+       STACK_TYPE_TASK,
+       STACK_TYPE_IRQ,
+       STACK_TYPE_SOFTIRQ,
+       STACK_TYPE_EXCEPTION,
+       STACK_TYPE_EXCEPTION_LAST = STACK_TYPE_EXCEPTION + N_EXCEPTION_STACKS-1,
+};
 
-extern int kstack_depth_to_print;
-
-struct thread_info;
-struct stacktrace_ops;
-
-typedef unsigned long (*walk_stack_t)(struct task_struct *task,
-                                     unsigned long *stack,
-                                     unsigned long bp,
-                                     const struct stacktrace_ops *ops,
-                                     void *data,
-                                     unsigned long *end,
-                                     int *graph);
-
-extern unsigned long
-print_context_stack(struct task_struct *task,
-                   unsigned long *stack, unsigned long bp,
-                   const struct stacktrace_ops *ops, void *data,
-                   unsigned long *end, int *graph);
-
-extern unsigned long
-print_context_stack_bp(struct task_struct *task,
-                      unsigned long *stack, unsigned long bp,
-                      const struct stacktrace_ops *ops, void *data,
-                      unsigned long *end, int *graph);
-
-/* Generic stack tracer with callbacks */
-
-struct stacktrace_ops {
-       int (*address)(void *data, unsigned long address, int reliable);
-       /* On negative return stop dumping */
-       int (*stack)(void *data, char *name);
-       walk_stack_t    walk_stack;
+struct stack_info {
+       enum stack_type type;
+       unsigned long *begin, *end, *next_sp;
 };
 
-void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
-               unsigned long *stack, unsigned long bp,
-               const struct stacktrace_ops *ops, void *data);
+bool in_task_stack(unsigned long *stack, struct task_struct *task,
+                  struct stack_info *info);
+
+int get_stack_info(unsigned long *stack, struct task_struct *task,
+                  struct stack_info *info, unsigned long *visit_mask);
+
+void stack_type_str(enum stack_type type, const char **begin,
+                   const char **end);
+
+static inline bool on_stack(struct stack_info *info, void *addr, size_t len)
+{
+       void *begin = info->begin;
+       void *end   = info->end;
+
+       return (info->type != STACK_TYPE_UNKNOWN &&
+               addr >= begin && addr < end &&
+               addr + len > begin && addr + len <= end);
+}
+
+extern int kstack_depth_to_print;
 
 #ifdef CONFIG_X86_32
 #define STACKSLOTS_PER_LINE 8
-#define get_bp(bp) asm("movl %%ebp, %0" : "=r" (bp) :)
 #else
 #define STACKSLOTS_PER_LINE 4
-#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)
+static inline unsigned long *
+get_frame_pointer(struct task_struct *task, struct pt_regs *regs)
 {
-       unsigned long bp;
-
        if (regs)
-               return regs->bp;
+               return (unsigned long *)regs->bp;
 
-       if (task == current) {
-               /* Grab bp right from our regs */
-               get_bp(bp);
-               return bp;
-       }
+       if (task == current)
+               return __builtin_frame_address(0);
 
-       /* bp is the last reg pushed by switch_to */
-       return *(unsigned long *)task->thread.sp;
+       return (unsigned long *)((struct inactive_task_frame *)task->thread.sp)->bp;
 }
 #else
-static inline unsigned long
-stack_frame(struct task_struct *task, struct pt_regs *regs)
+static inline unsigned long *
+get_frame_pointer(struct task_struct *task, struct pt_regs *regs)
 {
-       return 0;
+       return NULL;
+}
+#endif /* CONFIG_FRAME_POINTER */
+
+static inline unsigned long *
+get_stack_pointer(struct task_struct *task, struct pt_regs *regs)
+{
+       if (regs)
+               return (unsigned long *)kernel_stack_pointer(regs);
+
+       if (task == current)
+               return __builtin_frame_address(0);
+
+       return (unsigned long *)task->thread.sp;
 }
-#endif
 
-extern void
-show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
-                  unsigned long *stack, unsigned long bp, char *log_lvl);
+void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
+                       unsigned long *stack, 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);
+void show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
+                       unsigned long *sp, char *log_lvl);
 
 extern unsigned int code_bytes;
 
@@ -106,7 +106,7 @@ static inline unsigned long caller_frame_pointer(void)
 {
        struct stack_frame *frame;
 
-       get_bp(frame);
+       frame = __builtin_frame_address(0);
 
 #ifdef CONFIG_FRAME_POINTER
        frame = frame->next_frame;