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: src/sys/amd64/include/profile.h,v 1.33 2004/01/06 20:36:21 nectar Exp $ 35 */ 36 37 #ifndef _CPU_PROFILE_H_ 38 #define _CPU_PROFILE_H_ 39 40 #ifdef _KERNEL 41 42 /* 43 * Config generates something to tell the compiler to align functions on 16 44 * byte boundaries. A strict alignment is good for keeping the tables small. 45 */ 46 #define FUNCTION_ALIGNMENT 16 47 48 /* 49 * The kernel uses assembler stubs instead of unportable inlines. 50 * This is mainly to save a little time when profiling is not enabled, 51 * which is the usual case for the kernel. 52 */ 53 #define _MCOUNT_DECL void mcount 54 #define MCOUNT 55 56 #ifdef GUPROF 57 #define CALIB_SCALE 1000 58 #define KCOUNT(p,index) ((p)->kcount[(index) \ 59 / (HISTFRACTION * sizeof(HISTCOUNTER))]) 60 #define MCOUNT_DECL(s) 61 #define MCOUNT_ENTER(s) 62 #define MCOUNT_EXIT(s) 63 #define PC_TO_I(p, pc) ((uintfptr_t)(pc) - (uintfptr_t)(p)->lowpc) 64 #else 65 #define MCOUNT_DECL(s) u_long s; 66 #ifdef SMP 67 extern int mcount_lock; 68 #define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); \ 69 while (!atomic_cmpset_acq_int(&mcount_lock, 0, 1)) \ 70 /* nothing */ ; } 71 #define MCOUNT_EXIT(s) { atomic_store_rel_int(&mcount_lock, 0); \ 72 write_rflags(s); } 73 #else 74 #define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); } 75 #define MCOUNT_EXIT(s) (write_rflags(s)) 76 #endif 77 #endif /* GUPROF */ 78 79 #else /* !_KERNEL */ 80 81 #define FUNCTION_ALIGNMENT 4 82 83 #define _MCOUNT_DECL static __inline void _mcount 84 85 #ifdef __GNUC__ 86 #define MCOUNT \ 87 void \ 88 mcount() \ 89 { \ 90 uintfptr_t selfpc, frompc; \ 91 /* \ 92 * Find the return address for mcount, \ 93 * and the return address for mcount's caller. \ 94 * \ 95 * selfpc = pc pushed by call to mcount \ 96 */ \ 97 __asm("movq 8(%%rbp),%0" : "=r" (selfpc)); \ 98 /* \ 99 * frompc = pc pushed by call to mcount's caller. \ 100 * The caller's stack frame has already been built, so %ebp is \ 101 * the caller's frame pointer. The caller's raddr is in the \ 102 * caller's frame following the caller's caller's frame pointer.\ 103 */ \ 104 __asm("movq (%%rbp),%0" : "=r" (frompc)); \ 105 frompc = ((uintfptr_t *)frompc)[1]; \ 106 _mcount(frompc, selfpc); \ 107 } 108 #else /* __GNUC__ */ 109 #define MCOUNT \ 110 void \ 111 mcount() \ 112 { \ 113 } 114 #endif /* __GNUC__ */ 115 116 typedef unsigned long uintfptr_t; 117 118 #endif /* _KERNEL */ 119 120 /* 121 * An unsigned integral type that can hold non-negative difference between 122 * function pointers. 123 */ 124 typedef u_int fptrdiff_t; 125 126 #ifdef _KERNEL 127 128 void mcount(uintfptr_t frompc, uintfptr_t selfpc); 129 void kmupetext(uintfptr_t nhighpc); 130 131 #ifdef GUPROF 132 struct gmonparam; 133 134 void nullfunc_loop_profiled(void); 135 void nullfunc_profiled(void); 136 void startguprof(struct gmonparam *p); 137 void stopguprof(struct gmonparam *p); 138 #else 139 #define startguprof(p) 140 #define stopguprof(p) 141 #endif /* GUPROF */ 142 143 #else /* !_KERNEL */ 144 145 #include <sys/cdefs.h> 146 147 __BEGIN_DECLS 148 #ifdef __GNUC__ 149 void mcount(void) __asm(".mcount"); 150 #endif 151 __END_DECLS 152 153 #endif /* _KERNEL */ 154 155 #ifdef GUPROF 156 /* XXX doesn't quite work outside kernel yet. */ 157 extern int cputime_bias; 158 159 __BEGIN_DECLS 160 int cputime(void); 161 void empty_loop(void); 162 void mexitcount(uintfptr_t selfpc); 163 void nullfunc(void); 164 void nullfunc_loop(void); 165 __END_DECLS 166 #endif 167 168 #endif /* !_CPU_PROFILE_H_ */ 169