970e51fead
Add stacktrace support for User Mode Linux Signed-off-by: Daniel Walter <dwalter@google.com> Signed-off-by: Richard Weinberger <richard@nod.at>
63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
/*
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* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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* Copyright (C) 2013 Richard Weinberger <richrd@nod.at>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kallsyms.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <asm/sysrq.h>
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#include <asm/stacktrace.h>
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#include <os.h>
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static void _print_addr(void *data, unsigned long address, int reliable)
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{
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pr_info(" [<%08lx>]", address);
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pr_cont(" %s", reliable ? "" : "? ");
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print_symbol("%s", address);
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pr_cont("\n");
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}
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static const struct stacktrace_ops stackops = {
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.address = _print_addr
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};
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void show_stack(struct task_struct *task, unsigned long *stack)
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{
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unsigned long *sp = stack, bp = 0;
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struct pt_regs *segv_regs = current->thread.segv_regs;
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int i;
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if (!segv_regs && os_is_signal_stack()) {
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pr_err("Received SIGSEGV in SIGSEGV handler,"
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" aborting stack trace!\n");
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return;
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}
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#ifdef CONFIG_FRAME_POINTER
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bp = get_frame_pointer(task, segv_regs);
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#endif
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if (!stack)
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sp = get_stack_pointer(task, segv_regs);
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pr_info("Stack:\n");
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stack = sp;
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for (i = 0; i < 3 * STACKSLOTS_PER_LINE; i++) {
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if (kstack_end(stack))
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break;
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if (i && ((i % STACKSLOTS_PER_LINE) == 0))
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pr_cont("\n");
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pr_cont(" %08lx", *stack++);
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}
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pr_cont("\n");
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pr_info("Call Trace:\n");
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dump_trace(current, &stackops, NULL);
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pr_info("\n");
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}
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