1 /* $NetBSD: profile.h,v 1.34 2016/01/10 09:04:32 ryo 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 35 #include <machine/cpufunc.h> 36 #endif 37 38 #define _MCOUNT_DECL static __inline void _mcount 39 40 #ifdef __ELF__ 41 #define MCOUNT_ENTRY "__mcount" 42 #define MCOUNT_COMPAT __weak_alias(mcount, __mcount) 43 #else 44 #define MCOUNT_ENTRY "mcount" 45 #define MCOUNT_COMPAT /* nothing */ 46 #endif 47 48 #define MCOUNT \ 49 MCOUNT_COMPAT \ 50 extern void mcount(void) __asm(MCOUNT_ENTRY) \ 51 __attribute__((__no_instrument_function__)); \ 52 void \ 53 mcount(void) \ 54 { \ 55 int selfpc, frompcindex; \ 56 int eax, ecx, edx; \ 57 \ 58 __asm volatile("movl %%eax,%0" : "=g" (eax)); \ 59 __asm volatile("movl %%ecx,%0" : "=g" (ecx)); \ 60 __asm volatile("movl %%edx,%0" : "=g" (edx)); \ 61 /* \ 62 * find the return address for mcount, \ 63 * and the return address for mcount's caller. \ 64 * \ 65 * selfpc = pc pushed by mcount call \ 66 */ \ 67 __asm volatile("movl 4(%%ebp),%0" : "=r" (selfpc)); \ 68 /* \ 69 * frompcindex = pc pushed by call into self. \ 70 */ \ 71 __asm volatile("movl (%%ebp),%0;movl 4(%0),%0" \ 72 : "=r" (frompcindex)); \ 73 _mcount((u_long)frompcindex, (u_long)selfpc); \ 74 \ 75 __asm volatile("movl %0,%%edx" : : "g" (edx)); \ 76 __asm volatile("movl %0,%%ecx" : : "g" (ecx)); \ 77 __asm volatile("movl %0,%%eax" : : "g" (eax)); \ 78 } 79 80 #ifdef _KERNEL 81 static inline void 82 mcount_disable_intr(void) 83 { 84 __asm volatile("cli"); 85 } 86 87 static inline u_long 88 mcount_read_psl(void) 89 { 90 u_long ef; 91 92 __asm volatile("pushfl; popl %0" : "=r" (ef)); 93 return (ef); 94 } 95 96 static inline void 97 mcount_write_psl(u_long ef) 98 { 99 __asm volatile("pushl %0; popfl" : : "r" (ef)); 100 } 101 102 #define MCOUNT_ENTER \ 103 do { s = (int)mcount_read_psl(); mcount_disable_intr(); } while (0) 104 #define MCOUNT_EXIT do { mcount_write_psl(s); } while (0) 105 106 #endif /* _KERNEL */ 107