1 /* $NetBSD: profile.h,v 1.20 2005/02/21 01:17:29 chs Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)profile.h 8.1 (Berkeley) 6/11/93 32 */ 33 34 #ifdef _KERNEL_OPT 35 #include "opt_multiprocessor.h" 36 #endif 37 38 #include <machine/cpufunc.h> 39 40 #define _MCOUNT_DECL static __inline void _mcount 41 42 #ifdef __ELF__ 43 #define MCOUNT_ENTRY "__mcount" 44 #define MCOUNT_COMPAT __weak_alias(mcount, __mcount) 45 #else 46 #define MCOUNT_ENTRY "mcount" 47 #define MCOUNT_COMPAT /* nothing */ 48 #endif 49 50 #define MCOUNT \ 51 MCOUNT_COMPAT \ 52 extern void mcount(void) __asm__(MCOUNT_ENTRY); \ 53 void \ 54 mcount() \ 55 { \ 56 int selfpc, frompcindex; \ 57 /* \ 58 * find the return address for mcount, \ 59 * and the return address for mcount's caller. \ 60 * \ 61 * selfpc = pc pushed by mcount call \ 62 */ \ 63 __asm__ __volatile__("movl 4(%%ebp),%0" : "=r" (selfpc)); \ 64 /* \ 65 * frompcindex = pc pushed by call into self. \ 66 */ \ 67 __asm__ __volatile__("movl (%%ebp),%0;movl 4(%0),%0" \ 68 : "=r" (frompcindex)); \ 69 _mcount((u_long)frompcindex, (u_long)selfpc); \ 70 } 71 72 #ifdef _KERNEL 73 #ifdef MULTIPROCESSOR 74 __cpu_simple_lock_t __mcount_lock; 75 76 #define MCOUNT_ENTER_MP \ 77 __cpu_simple_lock(&__mcount_lock); 78 #define MCOUNT_EXIT_MP \ 79 __cpu_simple_unlock(&__mcount_lock); 80 81 #else 82 #define MCOUNT_ENTER_MP 83 #define MCOUNT_EXIT_MP 84 #endif 85 86 #define MCOUNT_ENTER \ 87 s = (int)read_psl(); \ 88 disable_intr(); \ 89 MCOUNT_ENTR_MP 90 91 #define MCOUNT_EXIT \ 92 MCOUNT_EXIT_MP \ 93 write_psl(s); 94 95 #endif /* _KERNEL */ 96