Aquaris-M10-4G/drivers/misc/mediatek/aee/mrdump/mrdump_arm.c

#include <linux/bug.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/ptrace.h>
#include "mrdump_private.h"

void mrdump_save_current_backtrace(struct pt_regs *regs)
{
	asm volatile ("stmia %1, {r0 - r15}\n\t" "mrs %0, cpsr\n":"=r" (regs->uregs[16]) : "r"(regs) : "memory");
}

void mrdump_print_crash(struct pt_regs *regs)
{
	unsigned int fp, mode;
	int ok = 1;

	__show_regs(regs);

	/* Print current backtrace */
	pr_notice("Backtrace: ");
	fp = regs->ARM_fp;
	mode = processor_mode(regs);

	if (!fp) {
		pr_notice("no frame pointer");
		ok = 0;
	} else if ((fp < PAGE_OFFSET)
		   || ((high_memory != NULL) && (fp > (unsigned long)high_memory))) {
		pr_notice("invalid frame pointer 0x%08x", fp);
		ok = 0;
	}
	pr_notice("\n");

	if (ok)
		c_backtrace(fp, mode);
}