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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 | /* * Copyright (C) 1991, 1992 Linus Torvalds * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs */ #ifndef _ASM_X86_STACKTRACE_H #define _ASM_X86_STACKTRACE_H #include <linux/uaccess.h> #include <linux/ptrace.h> 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; }; void dump_trace(struct task_struct *tsk, struct pt_regs *regs, unsigned long *stack, unsigned long bp, const struct stacktrace_ops *ops, void *data); #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) { 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); extern void show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs, unsigned long *sp, unsigned long bp, char *log_lvl); extern unsigned int code_bytes; /* The form of the top of the frame on the stack */ struct stack_frame { struct stack_frame *next_frame; unsigned long return_address; }; struct stack_frame_ia32 { u32 next_frame; u32 return_address; }; static inline unsigned long caller_frame_pointer(void) { struct stack_frame *frame; get_bp(frame); #ifdef CONFIG_FRAME_POINTER frame = frame->next_frame; #endif return (unsigned long)frame; } #endif /* _ASM_X86_STACKTRACE_H */ |