projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * Copyright (C) 2001 - 2003 Jeff Dike (jdike@addtoit.com) | |
| 3 | * Licensed under the GPL | |
| 4 | */ | |
| 5 | ||
| b3461034 | 6 | #include "linux/config.h" |
| 1da177e4 LT |
7 | #include "linux/kernel.h" |
| 8 | #include "linux/smp.h" | |
| 9 | #include "linux/sched.h" | |
| b3461034 | 10 | #include "linux/kallsyms.h" |
| 1da177e4 LT |
11 | #include "asm/ptrace.h" |
| 12 | #include "sysrq.h" | |
| 13 | ||
| b3461034 | 14 | /* This is declared by <linux/sched.h> */ |
| 1da177e4 LT |
15 | void show_regs(struct pt_regs *regs) |
| 16 | { | |
| 17 | printk("\n"); | |
| 18 | printk("EIP: %04lx:[<%08lx>] CPU: %d %s", | |
| 19 | 0xffff & PT_REGS_CS(regs), PT_REGS_IP(regs), | |
| 20 | smp_processor_id(), print_tainted()); | |
| 21 | if (PT_REGS_CS(regs) & 3) | |
| 22 | printk(" ESP: %04lx:%08lx", 0xffff & PT_REGS_SS(regs), | |
| 23 | PT_REGS_SP(regs)); | |
| 24 | printk(" EFLAGS: %08lx\n %s\n", PT_REGS_EFLAGS(regs), | |
| 25 | print_tainted()); | |
| 26 | printk("EAX: %08lx EBX: %08lx ECX: %08lx EDX: %08lx\n", | |
| 27 | PT_REGS_EAX(regs), PT_REGS_EBX(regs), | |
| 28 | PT_REGS_ECX(regs), | |
| 29 | PT_REGS_EDX(regs)); | |
| 30 | printk("ESI: %08lx EDI: %08lx EBP: %08lx", | |
| 31 | PT_REGS_ESI(regs), PT_REGS_EDI(regs), | |
| 32 | PT_REGS_EBP(regs)); | |
| 33 | printk(" DS: %04lx ES: %04lx\n", | |
| 34 | 0xffff & PT_REGS_DS(regs), | |
| 35 | 0xffff & PT_REGS_ES(regs)); | |
| 36 | ||
| b3461034 | 37 | show_trace(NULL, (unsigned long *) ®s); |
| 1da177e4 | 38 | } |
| b3461034 PBG |
39 | |
| 40 | /* Copied from i386. */ | |
| 41 | static inline int valid_stack_ptr(struct thread_info *tinfo, void *p) | |
| 42 | { | |
| 43 | return p > (void *)tinfo && | |
| 44 | p < (void *)tinfo + THREAD_SIZE - 3; | |
| 45 | } | |
| 46 | ||
| 47 | /* Adapted from i386 (we also print the address we read from). */ | |
| 48 | static inline unsigned long print_context_stack(struct thread_info *tinfo, | |
| 49 | unsigned long *stack, unsigned long ebp) | |
| 50 | { | |
| 51 | unsigned long addr; | |
| 52 | ||
| 53 | #ifdef CONFIG_FRAME_POINTER | |
| 54 | while (valid_stack_ptr(tinfo, (void *)ebp)) { | |
| 55 | addr = *(unsigned long *)(ebp + 4); | |
| 56 | printk("%08lx: [<%08lx>]", ebp + 4, addr); | |
| 57 | print_symbol(" %s", addr); | |
| 58 | printk("\n"); | |
| 59 | ebp = *(unsigned long *)ebp; | |
| 60 | } | |
| 61 | #else | |
| 62 | while (valid_stack_ptr(tinfo, stack)) { | |
| 63 | addr = *stack; | |
| 64 | if (__kernel_text_address(addr)) { | |
| 65 | printk("%08lx: [<%08lx>]", (unsigned long) stack, addr); | |
| 66 | print_symbol(" %s", addr); | |
| 67 | printk("\n"); | |
| 68 | } | |
| 69 | stack++; | |
| 70 | } | |
| 71 | #endif | |
| 72 | return ebp; | |
| 73 | } | |
| 74 | ||
| 75 | void show_trace(struct task_struct* task, unsigned long * stack) | |
| 76 | { | |
| 77 | unsigned long ebp; | |
| 78 | struct thread_info *context; | |
| 79 | ||
| 80 | /* Turn this into BUG_ON if possible. */ | |
| 81 | if (!stack) { | |
| 82 | stack = (unsigned long*) &stack; | |
| 83 | printk("show_trace: got NULL stack, implicit assumption task == current"); | |
| 84 | WARN_ON(1); | |
| 85 | } | |
| 86 | ||
| 87 | if (!task) | |
| 88 | task = current; | |
| 89 | ||
| 90 | if (task != current) { | |
| fad1c45c | 91 | ebp = (unsigned long) KSTK_EBP(task); |
| b3461034 PBG |
92 | } else { |
| 93 | asm ("movl %%ebp, %0" : "=r" (ebp) : ); | |
| 94 | } | |
| 95 | ||
| 96 | context = (struct thread_info *) | |
| 97 | ((unsigned long)stack & (~(THREAD_SIZE - 1))); | |
| 98 | print_context_stack(context, stack, ebp); | |
| 99 | ||
| b3461034 PBG |
100 | printk("\n"); |
| 101 | } | |
| 102 |