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ce6e85a186
The show_stack function had some code to detect double faults. However, the logic is wrong and it would e.g. trigger if a WARNING happened inside an IRQ. Remove it without trying to add a new logic. The current behaviour, which will just fault repeatedly until the IRQ stack is used up and the host kills UML, seems to be good enough. Signed-off-by: Benjamin Berg <benjamin.berg@intel.com> Link: https://patch.msgid.link/20241103150506.1367695-5-benjamin@sipsolutions.net Signed-off-by: Johannes Berg <johannes.berg@intel.com>
51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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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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#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 <linux/sched/debug.h>
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#include <linux/sched/task_stack.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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const char *loglvl = data;
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printk("%s [<%08lx>] %s%pS\n", loglvl, address, reliable ? "" : "? ",
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(void *)address);
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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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const char *loglvl)
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{
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struct pt_regs *segv_regs = current->thread.segv_regs;
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int i;
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if (!stack)
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stack = get_stack_pointer(task, segv_regs);
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printk("%sStack:\n", loglvl);
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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", READ_ONCE_NOCHECK(*stack));
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stack++;
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}
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printk("%sCall Trace:\n", loglvl);
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dump_trace(current, &stackops, (void *)loglvl);
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}
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