mirror of https://gitee.com/openkylin/linux.git
50 lines
1.0 KiB
C
50 lines
1.0 KiB
C
// 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 *stack_end;
|
|
unsigned long *stack_start;
|
|
unsigned long *fp;
|
|
unsigned long addr;
|
|
|
|
addr = (unsigned long) stack & THREAD_MASK;
|
|
stack_start = (unsigned long *) addr;
|
|
stack_end = (unsigned long *) (addr + THREAD_SIZE);
|
|
|
|
fp = stack;
|
|
pr_info("\nCall Trace:");
|
|
|
|
while (fp > stack_start && fp < stack_end) {
|
|
#ifdef CONFIG_STACKTRACE
|
|
addr = fp[1];
|
|
fp = (unsigned long *) fp[0];
|
|
#else
|
|
addr = *fp++;
|
|
#endif
|
|
if (__kernel_text_address(addr))
|
|
pr_cont("\n[<%08lx>] %pS", addr, (void *)addr);
|
|
}
|
|
pr_cont("\n");
|
|
}
|
|
|
|
void show_stack(struct task_struct *task, unsigned long *stack)
|
|
{
|
|
if (!stack) {
|
|
if (task)
|
|
stack = (unsigned long *)thread_saved_fp(task);
|
|
else
|
|
#ifdef CONFIG_STACKTRACE
|
|
asm volatile("mov %0, r8\n":"=r"(stack)::"memory");
|
|
#else
|
|
stack = (unsigned long *)&stack;
|
|
#endif
|
|
}
|
|
|
|
show_trace(stack);
|
|
}
|