profile_mcount_arm.s

来自「自学ZedBoard：使用IP通过ARM PS访问FPGA（源代码）」· S 代码 · 共 34 行

//
// Copyright (c) 2012 Xilinx, Inc.  All rights reserved.
// Xilinx, Inc.
//
// XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" AS A
// COURTESY TO YOU.  BY PROVIDING THIS DESIGN, CODE, OR INFORMATION AS
// ONE POSSIBLE   IMPLEMENTATION OF THIS FEATURE, APPLICATION OR
// STANDARD, XILINX IS MAKING NO REPRESENTATION THAT THIS IMPLEMENTATION
// IS FREE FROM ANY CLAIMS OF INFRINGEMENT, AND YOU ARE RESPONSIBLE
// FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE FOR YOUR IMPLEMENTATION.
// XILINX EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO
// THE ADEQUACY OF THE IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO
// ANY WARRANTIES OR REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE
// FROM CLAIMS OF INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $Id: profile_mcount_arm.S,v 1.1.2.1 2011/05/17 04:37:57 sadanan Exp $
//

// based on "ARM Profiling Implementation" from Sourcery G++ Lite for ARM EABI

.globl __gnu_mcount_nc
.type __gnu_mcount_nc, %function

__gnu_mcount_nc:
	push	{r0, r1, r2, r3, lr}
	subs	r1, lr, #0			/* callee - current lr */
	ldr	r0, [sp, #20]			/* caller - at the top of the stack */
	bl	mcount				/* when __gnu_mcount_nc is called */
	pop	{r0, r1, r2, r3, ip, lr}
	bx	ip

	.end __gnu_mcount_nc