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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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2ce36bfa6a
This patch adds arch ptrace implementation, stack dump and bug.h. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
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#include <linux/ptrace.h>
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int kstack_depth_to_print = 48;
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void show_trace(unsigned long *stack)
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{
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unsigned long *endstack;
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unsigned long addr;
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int i;
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pr_info("Call Trace:\n");
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addr = (unsigned long)stack + THREAD_SIZE - 1;
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endstack = (unsigned long *)(addr & -THREAD_SIZE);
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i = 0;
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while (stack + 1 <= endstack) {
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addr = *stack++;
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/*
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* If the address is either in the text segment of the
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* kernel, or in the region which contains vmalloc'ed
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* memory, it *may* be the address of a calling
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* routine; if so, print it so that someone tracing
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* down the cause of the crash will be able to figure
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* out the call path that was taken.
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*/
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if (__kernel_text_address(addr)) {
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#ifndef CONFIG_KALLSYMS
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if (i % 5 == 0)
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pr_cont("\n ");
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#endif
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pr_cont(" [<%08lx>] %pS\n", addr, (void *)addr);
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i++;
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}
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}
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pr_cont("\n");
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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 *p;
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unsigned long *endstack;
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int i;
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if (!stack) {
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if (task)
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stack = (unsigned long *)task->thread.esp0;
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else
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stack = (unsigned long *)&stack;
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}
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endstack = (unsigned long *)
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(((unsigned long)stack + THREAD_SIZE - 1) & -THREAD_SIZE);
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pr_info("Stack from %08lx:", (unsigned long)stack);
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p = stack;
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for (i = 0; i < kstack_depth_to_print; i++) {
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if (p + 1 > endstack)
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break;
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if (i % 8 == 0)
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pr_cont("\n ");
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pr_cont(" %08lx", *p++);
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}
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pr_cont("\n");
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show_trace(stack);
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}
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