1 /* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)profile.h 8.1 (Berkeley) 6/11/93 34 * $FreeBSD$ 35 */ 36 37 #ifndef _MACHINE_PROFILE_H_ 38 #define _MACHINE_PROFILE_H_ 39 40 #ifdef KERNEL 41 /* 42 * Config generates something to tell the compiler to align functions on 16 43 * byte boundaries. A strict alignment is good for keeping the tables small. 44 */ 45 #define FUNCTION_ALIGNMENT 16 46 47 /* 48 * The kernel uses assembler stubs instead of unportable inlines. 49 * This is mainly to save a little time when profiling is not enabled, 50 * which is the usual case for the kernel. 51 */ 52 #define _MCOUNT_DECL void mcount 53 #define MCOUNT 54 55 #ifdef GUPROF 56 #define CALIB_SCALE 1000 57 #define KCOUNT(p,index) ((p)->kcount[(index) \ 58 / (HISTFRACTION * sizeof(HISTCOUNTER))]) 59 #define MCOUNT_DECL(s) 60 #define MCOUNT_ENTER(s) 61 #define MCOUNT_EXIT(s) 62 #define PC_TO_I(p, pc) ((fptrint_t)(pc) - (fptrint_t)(p)->lowpc) 63 #else 64 #define MCOUNT_DECL(s) u_long s; 65 #define MCOUNT_ENTER(s) { s = read_eflags(); disable_intr(); } 66 #define MCOUNT_EXIT(s) (write_eflags(s)) 67 #endif /* GUPROF */ 68 69 #else /* !KERNEL */ 70 71 #define FUNCTION_ALIGNMENT 4 72 73 #define _MCOUNT_DECL static __inline void _mcount 74 75 #define MCOUNT \ 76 void \ 77 mcount() \ 78 { \ 79 fptrint_t selfpc, frompc; \ 80 /* \ 81 * Find the return address for mcount, \ 82 * and the return address for mcount's caller. \ 83 * \ 84 * selfpc = pc pushed by call to mcount \ 85 */ \ 86 asm("movl 4(%%ebp),%0" : "=r" (selfpc)); \ 87 /* \ 88 * frompc = pc pushed by call to mcount's caller. \ 89 * The caller's stack frame has already been built, so %ebp is \ 90 * the caller's frame pointer. The caller's raddr is in the \ 91 * caller's frame following the caller's caller's frame pointer. \ 92 */ \ 93 asm("movl (%%ebp),%0" : "=r" (frompc)); \ 94 frompc = ((fptrint_t *)frompc)[1]; \ 95 _mcount(frompc, selfpc); \ 96 } 97 #endif /* KERNEL */ 98 99 /* An unsigned integral type that can hold function pointers. */ 100 typedef u_int fptrint_t; 101 102 /* 103 * An unsigned integral type that can hold non-negative difference between 104 * function pointers. 105 */ 106 typedef int fptrdiff_t; 107 108 #ifdef KERNEL 109 110 void mcount __P((fptrint_t frompc, fptrint_t selfpc)); 111 112 #ifdef GUPROF 113 struct gmonparam; 114 115 void nullfunc_loop_profiled __P((void)); 116 void nullfunc_profiled __P((void)); 117 void startguprof __P((struct gmonparam *p)); 118 void stopguprof __P((struct gmonparam *p)); 119 #else 120 #define startguprof(p) 121 #define stopguprof(p) 122 #endif /* GUPROF */ 123 124 #else /* !KERNEL */ 125 126 #include <sys/cdefs.h> 127 128 __BEGIN_DECLS 129 void mcount __P((void)) __asm("mcount"); 130 static void _mcount __P((fptrint_t frompc, fptrint_t selfpc)); 131 __END_DECLS 132 133 #endif /* KERNEL */ 134 135 #ifdef GUPROF 136 /* XXX doesn't quite work outside kernel yet. */ 137 extern int cputime_bias; 138 139 __BEGIN_DECLS 140 int cputime __P((void)); 141 void empty_loop __P((void)); 142 void mexitcount __P((fptrint_t selfpc)); 143 void nullfunc __P((void)); 144 void nullfunc_loop __P((void)); 145 __END_DECLS 146 #endif 147 148 #endif /* !_MACHINE_PROFILE_H_ */ 149