stacktrace.c

来自「omap3 linux 2.6 用nocc去除了冗余代码」· C语言 代码 · 共 36 行

#include <linux/module.h>
#include <linux/sched.h>
#include <linux/stacktrace.h>

#include "stacktrace.h"

int walk_stackframe(unsigned long fp, unsigned long low, unsigned long high,
		    int (*fn)(struct stackframe *, void *), void *data)
{
	struct stackframe *frame;

	do {
		/*
		 * Check current frame pointer is within bounds
		 */
		if (fp < (low + 12) || fp + 4 >= high)
			break;

		frame = (struct stackframe *)(fp - 12);

		if (fn(frame, data))
			break;

		/*
		 * Update the low bound - the next frame must always
		 * be at a higher address than the current frame.
		 */
		low = fp + 4;
		fp = frame->fp;
	} while (fp);

	return 0;
}
EXPORT_SYMBOL(walk_stackframe);