1 /* $NetBSD: profile.h,v 1.24 2005/12/24 23:24:00 perry 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 __attribute__((__no_instrument_function__)); \ 54 void \ 55 mcount(void) \ 56 { \ 57 int selfpc, frompcindex; \ 58 /* \ 59 * find the return address for mcount, \ 60 * and the return address for mcount's caller. \ 61 * \ 62 * selfpc = pc pushed by mcount call \ 63 */ \ 64 __asm volatile("movl 4(%%ebp),%0" : "=r" (selfpc)); \ 65 /* \ 66 * frompcindex = pc pushed by call into self. \ 67 */ \ 68 __asm volatile("movl (%%ebp),%0;movl 4(%0),%0" \ 69 : "=r" (frompcindex)); \ 70 _mcount((u_long)frompcindex, (u_long)selfpc); \ 71 } 72 73 #ifdef _KERNEL 74 #ifdef MULTIPROCESSOR 75 __cpu_simple_lock_t __mcount_lock; 76 77 #define MCOUNT_ENTER_MP \ 78 __cpu_simple_lock(&__mcount_lock); 79 #define MCOUNT_EXIT_MP \ 80 __cpu_simple_unlock(&__mcount_lock); 81 82 #else 83 #define MCOUNT_ENTER_MP 84 #define MCOUNT_EXIT_MP 85 #endif 86 87 #define MCOUNT_ENTER \ 88 s = (int)read_psl(); \ 89 disable_intr(); \ 90 MCOUNT_ENTER_MP 91 92 #define MCOUNT_EXIT \ 93 MCOUNT_EXIT_MP \ 94 write_psl(s); 95 96 #endif /* _KERNEL */ 97