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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 *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);
}
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