| Neil Horman | 878719e | 2008-10-23 10:40:06 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 1991, 1992 Linus Torvalds |
| 3 | * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs |
| 4 | */ |
| 5 | |
| 6 | #ifndef DUMPSTACK_H |
| 7 | #define DUMPSTACK_H |
| 8 | |
| 9 | #ifdef CONFIG_X86_32 |
| 10 | #define STACKSLOTS_PER_LINE 8 |
| 11 | #define get_bp(bp) asm("movl %%ebp, %0" : "=r" (bp) :) |
| 12 | #else |
| 13 | #define STACKSLOTS_PER_LINE 4 |
| 14 | #define get_bp(bp) asm("movq %%rbp, %0" : "=r" (bp) :) |
| 15 | #endif |
| 16 | |
| Neil Horman | 878719e | 2008-10-23 10:40:06 -0400 | [diff] [blame] | 17 | extern void |
| 18 | show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs, |
| 19 | unsigned long *stack, unsigned long bp, char *log_lvl); |
| 20 | |
| 21 | extern void |
| 22 | show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs, |
| 23 | unsigned long *sp, unsigned long bp, char *log_lvl); |
| 24 | |
| 25 | extern unsigned int code_bytes; |
| Neil Horman | 878719e | 2008-10-23 10:40:06 -0400 | [diff] [blame] | 26 | |
| 27 | /* The form of the top of the frame on the stack */ |
| 28 | struct stack_frame { |
| 29 | struct stack_frame *next_frame; |
| 30 | unsigned long return_address; |
| 31 | }; |
| Frederic Weisbecker | 5331d7b | 2010-03-04 21:15:56 +0100 | [diff] [blame^] | 32 | |
| 33 | static inline unsigned long rewind_frame_pointer(int n) |
| 34 | { |
| 35 | struct stack_frame *frame; |
| 36 | |
| 37 | get_bp(frame); |
| 38 | |
| 39 | #ifdef CONFIG_FRAME_POINTER |
| 40 | while (n--) |
| 41 | frame = frame->next_frame; |
| Neil Horman | 878719e | 2008-10-23 10:40:06 -0400 | [diff] [blame] | 42 | #endif |
| Frederic Weisbecker | 5331d7b | 2010-03-04 21:15:56 +0100 | [diff] [blame^] | 43 | |
| 44 | return (unsigned long)frame; |
| 45 | } |
| 46 | |
| 47 | #endif /* DUMPSTACK_H */ |