fad1c45c93
The old code had the IP and SP coming from the registers in the thread struct, which are completely wrong since those are the userspace registers. This fixes that by pulling the correct values from the jmp_buf in which the kernel state of each thread is stored. Signed-off-by: Allan Graves <allan.graves@oracle.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
/*
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* Copyright (C) 2001 - 2003 Jeff Dike (jdike@addtoit.com)
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* Licensed under the GPL
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*/
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#include "linux/config.h"
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#include "linux/kernel.h"
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#include "linux/smp.h"
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#include "linux/sched.h"
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#include "linux/kallsyms.h"
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#include "asm/ptrace.h"
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#include "sysrq.h"
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/* This is declared by <linux/sched.h> */
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void show_regs(struct pt_regs *regs)
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{
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printk("\n");
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printk("EIP: %04lx:[<%08lx>] CPU: %d %s",
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0xffff & PT_REGS_CS(regs), PT_REGS_IP(regs),
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smp_processor_id(), print_tainted());
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if (PT_REGS_CS(regs) & 3)
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printk(" ESP: %04lx:%08lx", 0xffff & PT_REGS_SS(regs),
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PT_REGS_SP(regs));
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printk(" EFLAGS: %08lx\n %s\n", PT_REGS_EFLAGS(regs),
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print_tainted());
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printk("EAX: %08lx EBX: %08lx ECX: %08lx EDX: %08lx\n",
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PT_REGS_EAX(regs), PT_REGS_EBX(regs),
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PT_REGS_ECX(regs),
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PT_REGS_EDX(regs));
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printk("ESI: %08lx EDI: %08lx EBP: %08lx",
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PT_REGS_ESI(regs), PT_REGS_EDI(regs),
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PT_REGS_EBP(regs));
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printk(" DS: %04lx ES: %04lx\n",
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0xffff & PT_REGS_DS(regs),
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0xffff & PT_REGS_ES(regs));
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show_trace(NULL, (unsigned long *) ®s);
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}
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/* Copied from i386. */
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static inline int valid_stack_ptr(struct thread_info *tinfo, void *p)
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{
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return p > (void *)tinfo &&
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p < (void *)tinfo + THREAD_SIZE - 3;
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}
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/* Adapted from i386 (we also print the address we read from). */
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static inline unsigned long print_context_stack(struct thread_info *tinfo,
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unsigned long *stack, unsigned long ebp)
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{
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unsigned long addr;
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#ifdef CONFIG_FRAME_POINTER
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while (valid_stack_ptr(tinfo, (void *)ebp)) {
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addr = *(unsigned long *)(ebp + 4);
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printk("%08lx: [<%08lx>]", ebp + 4, addr);
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print_symbol(" %s", addr);
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printk("\n");
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ebp = *(unsigned long *)ebp;
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}
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#else
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while (valid_stack_ptr(tinfo, stack)) {
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addr = *stack;
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if (__kernel_text_address(addr)) {
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printk("%08lx: [<%08lx>]", (unsigned long) stack, addr);
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print_symbol(" %s", addr);
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printk("\n");
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}
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stack++;
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}
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#endif
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return ebp;
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}
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void show_trace(struct task_struct* task, unsigned long * stack)
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{
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unsigned long ebp;
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struct thread_info *context;
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/* Turn this into BUG_ON if possible. */
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if (!stack) {
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stack = (unsigned long*) &stack;
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printk("show_trace: got NULL stack, implicit assumption task == current");
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WARN_ON(1);
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}
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if (!task)
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task = current;
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if (task != current) {
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ebp = (unsigned long) KSTK_EBP(task);
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} else {
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asm ("movl %%ebp, %0" : "=r" (ebp) : );
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}
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context = (struct thread_info *)
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((unsigned long)stack & (~(THREAD_SIZE - 1)));
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print_context_stack(context, stack, ebp);
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printk("\n");
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}
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