C++ (Cpp) copy_from_user_nmi示例

示例#1

文件： backtrace.c 项目： Atrix-Dev-Team/kernel-MB860

static struct frame_head *dump_user_backtrace(struct frame_head *head)
{
	/* Also check accessibility of one struct frame_head beyond: */
	struct frame_head bufhead[2];
	unsigned long bytes;

	bytes = copy_from_user_nmi(bufhead, head, sizeof(bufhead));
	if (bytes != sizeof(bufhead))
		return NULL;

	oprofile_add_trace(bufhead[0].ret);

	/* frame pointers should strictly progress back up the stack
	 * (towards higher addresses) */
	if (head >= bufhead[0].bp)
		return NULL;

	return bufhead[0].bp;
}

示例#2

文件： backtrace.c 项目： romanbb/android_kernel_lge_d851

static struct stack_frame *dump_user_backtrace(struct stack_frame *head)
{
	/*                                                           */
	struct stack_frame bufhead[2];
	unsigned long bytes;

	bytes = copy_from_user_nmi(bufhead, head, sizeof(bufhead));
	if (bytes != sizeof(bufhead))
		return NULL;

	oprofile_add_trace(bufhead[0].return_address);

	/*                                                          
                               */
	if (head >= bufhead[0].next_frame)
		return NULL;

	return bufhead[0].next_frame;
}

示例#3

文件： backtrace.c 项目： ddalex/XT890-Kernel-Gamma

static struct stack_frame_ia32 *
dump_user_backtrace_32(struct stack_frame_ia32 *head)
{
	/* Also check accessibility of one struct frame_head beyond: */
	struct stack_frame_ia32 bufhead[2];
	struct stack_frame_ia32 *fp;
	unsigned long bytes;

	bytes = copy_from_user_nmi(bufhead, head, sizeof(bufhead));
	if (bytes != sizeof(bufhead))
		return NULL;

	fp = (struct stack_frame_ia32 *) compat_ptr(bufhead[0].next_frame);

	oprofile_add_trace(bufhead[0].return_address);

	/* frame pointers should strictly progress back up the stack
	* (towards higher addresses) */
	if (head >= fp)
		return NULL;

	return fp;
}

示例#4

文件： backtrace.c 项目： romanbb/android_kernel_lge_d851

static struct stack_frame_ia32 *
dump_user_backtrace_32(struct stack_frame_ia32 *head)
{
	/*                                                           */
	struct stack_frame_ia32 bufhead[2];
	struct stack_frame_ia32 *fp;
	unsigned long bytes;

	bytes = copy_from_user_nmi(bufhead, head, sizeof(bufhead));
	if (bytes != sizeof(bufhead))
		return NULL;

	fp = (struct stack_frame_ia32 *) compat_ptr(bufhead[0].next_frame);

	oprofile_add_trace(bufhead[0].return_address);

	/*                                                          
                              */
	if (head >= fp)
		return NULL;

	return fp;
}