b3461034d7
Copy (and adapt) to UML the stack code dumper used in i386 when CONFIG_FRAME_POINTER is enabled. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
114 lines
3.0 KiB
C
114 lines
3.0 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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/* Which one? No actual difference - just coding style.*/
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ebp = (unsigned long) PT_REGS_EBP(&task->thread.regs);
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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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/*while (((long) stack & (THREAD_SIZE-1)) != 0) {
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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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printk("\n");
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}
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