/* Machine-dependent definitions for profiling support.  ARM version.   Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.   This file is part of the GNU C Library.   The GNU C Library is free software; you can redistribute it and/or   modify it under the terms of the GNU Lesser General Public   License as published by the Free Software Foundation; either   version 2.1 of the License, or (at your option) any later version.   The GNU C Library is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU   Lesser General Public License for more details.   You should have received a copy of the GNU Lesser General Public   License along with the GNU C Library; if not, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  *//* GCC for the ARM cannot compile __builtin_return_address(N) for N != 0,    so we must use an assembly stub.  */#include <sysdep.h>#ifndef NO_UNDERSCORES/* The asm symbols for C functions are `_function'.   The canonical name for the counter function is `mcount', no _.  */void _mcount (void) asm ("mcount");#else/* The canonical name for the function is `_mcount' in both C and asm,   but some old asm code might assume it's `mcount'.  */void _mcount (void);weak_alias (_mcount, mcount)#endifstatic void mcount_internal (u_long frompc, u_long selfpc);#define _MCOUNT_DECL(frompc, selfpc) \static void mcount_internal (u_long frompc, u_long selfpc)/* This macro/func MUST save r0, r1 because the compiler inserts	blind calls to _mount(), ignoring the fact that _mcount may	clobber registers; therefore, _mcount may NOT clobber registers *//* if (this_fp!=0) {	r0 = this_fp	r1 = this_lr  	r1 = [r1-4] which is caller's lr 	if (r1!=0) 		r1 = caller's lr	call mcount_internal(this_lr, caller's_lr)   }*/#define MCOUNT								\void _mcount (void)							\{									\  __asm__("stmdb	sp!, {r0, r1, r2, r3};"				\	  "movs		fp, fp;"				      	\          "moveq	r1, #0;"					\	  "ldrne	r1, [fp, $-4];"					\	  "ldrne	r0, [fp, $-12];"				\	  "movnes	r0, r0;"					\	  "ldrne	r0, [r0, $-4];"					\	  "movs		r0, r0;"					\	  "blne		mcount_internal;"				\	  "ldmia	sp!, {r0, r1, r2, r3}");			\}