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// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
#include <linux/ptrace.h>
int kstack_depth_to_print = 48;
void show_trace(unsigned long *stack)
{
unsigned long *endstack;
unsigned long addr;
int i;
pr_info("Call Trace:\n");
addr = (unsigned long)stack + THREAD_SIZE - 1;
endstack = (unsigned long *)(addr & -THREAD_SIZE);
i = 0;
while (stack + 1 <= endstack) {
addr = *stack++;
/*
* If the address is either in the text segment of the
* kernel, or in the region which contains vmalloc'ed
* memory, it *may* be the address of a calling
* routine; if so, print it so that someone tracing
* down the cause of the crash will be able to figure
* out the call path that was taken.
*/
if (__kernel_text_address(addr)) {
#ifndef CONFIG_KALLSYMS
if (i % 5 == 0)
pr_cont("\n ");
#endif
pr_cont(" [<%08lx>] %pS\n", addr, (void *)addr);
i++;
}
}
pr_cont("\n");
}
void show_stack(struct task_struct *task, unsigned long *stack)
{
unsigned long *p;
unsigned long *endstack;
int i;
if (!stack) {
if (task)
stack = (unsigned long *)task->thread.esp0;
else
stack = (unsigned long *)&stack;
}
endstack = (unsigned long *)
(((unsigned long)stack + THREAD_SIZE - 1) & -THREAD_SIZE);
pr_info("Stack from %08lx:", (unsigned long)stack);
p = stack;
for (i = 0; i < kstack_depth_to_print; i++) {
if (p + 1 > endstack)
break;
if (i % 8 == 0)
pr_cont("\n ");
pr_cont(" %08lx", *p++);
}
pr_cont("\n");
show_trace(stack);
}
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