diff options
Diffstat (limited to 'arch/x86/kernel/dumpstack.c')
| -rw-r--r-- | arch/x86/kernel/dumpstack.c | 86 |
1 files changed, 0 insertions, 86 deletions
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c index c08f32ab8ace..999de3b3f7f4 100644 --- a/arch/x86/kernel/dumpstack.c +++ b/arch/x86/kernel/dumpstack.c | |||
| @@ -56,92 +56,6 @@ void printk_address(unsigned long address) | |||
| 56 | pr_cont(" [<%p>] %pS\n", (void *)address, (void *)address); | 56 | pr_cont(" [<%p>] %pS\n", (void *)address, (void *)address); |
| 57 | } | 57 | } |
| 58 | 58 | ||
| 59 | /* | ||
| 60 | * x86-64 can have up to three kernel stacks: | ||
| 61 | * process stack | ||
| 62 | * interrupt stack | ||
| 63 | * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack | ||
| 64 | */ | ||
| 65 | |||
| 66 | unsigned long | ||
| 67 | print_context_stack(struct task_struct *task, | ||
| 68 | unsigned long *stack, unsigned long bp, | ||
| 69 | const struct stacktrace_ops *ops, void *data, | ||
| 70 | struct stack_info *info, int *graph) | ||
| 71 | { | ||
| 72 | struct stack_frame *frame = (struct stack_frame *)bp; | ||
| 73 | |||
| 74 | /* | ||
| 75 | * If we overflowed the stack into a guard page, jump back to the | ||
| 76 | * bottom of the usable stack. | ||
| 77 | */ | ||
| 78 | if ((unsigned long)task_stack_page(task) - (unsigned long)stack < | ||
| 79 | PAGE_SIZE) | ||
| 80 | stack = (unsigned long *)task_stack_page(task); | ||
| 81 | |||
| 82 | while (on_stack(info, stack, sizeof(*stack))) { | ||
| 83 | unsigned long addr = *stack; | ||
| 84 | |||
| 85 | if (__kernel_text_address(addr)) { | ||
| 86 | unsigned long real_addr; | ||
| 87 | int reliable = 0; | ||
| 88 | |||
| 89 | if ((unsigned long) stack == bp + sizeof(long)) { | ||
| 90 | reliable = 1; | ||
| 91 | frame = frame->next_frame; | ||
| 92 | bp = (unsigned long) frame; | ||
| 93 | } | ||
| 94 | |||
| 95 | /* | ||
| 96 | * When function graph tracing is enabled for a | ||
| 97 | * function, its return address on the stack is | ||
| 98 | * replaced with the address of an ftrace handler | ||
| 99 | * (return_to_handler). In that case, before printing | ||
| 100 | * the "real" address, we want to print the handler | ||
| 101 | * address as an "unreliable" hint that function graph | ||
| 102 | * tracing was involved. | ||
| 103 | */ | ||
| 104 | real_addr = ftrace_graph_ret_addr(task, graph, addr, | ||
| 105 | stack); | ||
| 106 | if (real_addr != addr) | ||
| 107 | ops->address(data, addr, 0); | ||
| 108 | |||
| 109 | ops->address(data, real_addr, reliable); | ||
| 110 | } | ||
| 111 | stack++; | ||
| 112 | } | ||
| 113 | return bp; | ||
| 114 | } | ||
| 115 | EXPORT_SYMBOL_GPL(print_context_stack); | ||
| 116 | |||
| 117 | unsigned long | ||
| 118 | print_context_stack_bp(struct task_struct *task, | ||
| 119 | unsigned long *stack, unsigned long bp, | ||
| 120 | const struct stacktrace_ops *ops, void *data, | ||
| 121 | struct stack_info *info, int *graph) | ||
| 122 | { | ||
| 123 | struct stack_frame *frame = (struct stack_frame *)bp; | ||
| 124 | unsigned long *retp = &frame->return_address; | ||
| 125 | |||
| 126 | while (on_stack(info, stack, sizeof(*stack) * 2)) { | ||
| 127 | unsigned long addr = *retp; | ||
| 128 | unsigned long real_addr; | ||
| 129 | |||
| 130 | if (!__kernel_text_address(addr)) | ||
| 131 | break; | ||
| 132 | |||
| 133 | real_addr = ftrace_graph_ret_addr(task, graph, addr, retp); | ||
| 134 | if (ops->address(data, real_addr, 1)) | ||
| 135 | break; | ||
| 136 | |||
| 137 | frame = frame->next_frame; | ||
| 138 | retp = &frame->return_address; | ||
| 139 | } | ||
| 140 | |||
| 141 | return (unsigned long)frame; | ||
| 142 | } | ||
| 143 | EXPORT_SYMBOL_GPL(print_context_stack_bp); | ||
| 144 | |||
| 145 | void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs, | 59 | void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs, |
| 146 | unsigned long *stack, char *log_lvl) | 60 | unsigned long *stack, char *log_lvl) |
| 147 | { | 61 | { |