/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef _MACHINE_PROFILE_H_ #define _MACHINE_PROFILE_H_ #ifndef _KERNEL #include <sys/cdefs.h> #define FUNCTION_ALIGNMENT 4 #define _MCOUNT_DECL static __inline void _mcount #define MCOUNT \ void \ mcount() \ { \ uintfptr_t selfpc, frompc, ecx; \ /* \ * In gcc 4.2, ecx might be used in the caller as the arg \ * pointer if the stack realignment option is set (-mstackrealign) \ * or if the caller has the force_align_arg_pointer attribute \ * (stack realignment is ALWAYS on for main). Preserve ecx \ * here. \ */ \ __asm("" : "=c" (ecx)); \ /* \ * Find the return address for mcount, \ * and the return address for mcount's caller. \ * \ * selfpc = pc pushed by call to mcount \ */ \ __asm("movl 4(%%ebp),%0" : "=r" (selfpc)); \ /* \ * frompc = pc pushed by call to mcount's caller. \ * The caller's stack frame has already been built, so %ebp is \ * the caller's frame pointer. The caller's raddr is in the \ * caller's frame following the caller's caller's frame pointer.\ */ \ __asm("movl (%%ebp),%0" : "=r" (frompc)); \ frompc = ((uintfptr_t *)frompc)[1]; \ _mcount(frompc, selfpc); \ __asm("" : : "c" (ecx)); \ } typedef u_int uintfptr_t; /* * An unsigned integral type that can hold non-negative difference between * function pointers. */ typedef u_int fptrdiff_t; __BEGIN_DECLS void mcount(void) __asm(".mcount"); __END_DECLS #endif /* !_KERNEL */ #endif /* !_MACHINE_PROFILE_H_ */
