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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)profile.h 8.1 (Berkeley) 6/11/93 30 * $FreeBSD$ 31 */ 32 33 #ifndef _MACHINE_PROFILE_H_ 34 #define _MACHINE_PROFILE_H_ 35 36 #ifdef _KERNEL 37 38 /* 39 * Config generates something to tell the compiler to align functions on 16 40 * byte boundaries. A strict alignment is good for keeping the tables small. 41 */ 42 #define FUNCTION_ALIGNMENT 16 43 44 /* 45 * The kernel uses assembler stubs instead of unportable inlines. 46 * This is mainly to save a little time when profiling is not enabled, 47 * which is the usual case for the kernel. 48 */ 49 #define _MCOUNT_DECL void mcount 50 #define MCOUNT 51 52 #ifdef GUPROF 53 #define CALIB_SCALE 1000 54 #define KCOUNT(p,index) ((p)->kcount[(index) \ 55 / (HISTFRACTION * sizeof(HISTCOUNTER))]) 56 #define MCOUNT_DECL(s) 57 #define MCOUNT_ENTER(s) 58 #define MCOUNT_EXIT(s) 59 #define PC_TO_I(p, pc) ((uintfptr_t)(pc) - (uintfptr_t)(p)->lowpc) 60 #else 61 #define MCOUNT_DECL(s) u_long s; 62 #ifdef SMP 63 extern int mcount_lock; 64 #define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); \ 65 while (!atomic_cmpset_acq_int(&mcount_lock, 0, 1)) \ 66 /* nothing */ ; } 67 #define MCOUNT_EXIT(s) { atomic_store_rel_int(&mcount_lock, 0); \ 68 write_rflags(s); } 69 #else 70 #define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); } 71 #define MCOUNT_EXIT(s) (write_rflags(s)) 72 #endif 73 #endif /* GUPROF */ 74 75 #else /* !_KERNEL */ 76 77 #define FUNCTION_ALIGNMENT 4 78 79 #define _MCOUNT_DECL static __inline void _mcount 80 81 #ifdef __GNUC__ 82 #define MCOUNT \ 83 void \ 84 mcount() \ 85 { \ 86 uintfptr_t selfpc, frompc; \ 87 /* \ 88 * Find the return address for mcount, \ 89 * and the return address for mcount's caller. \ 90 * \ 91 * selfpc = pc pushed by call to mcount \ 92 */ \ 93 __asm("movq 8(%%rbp),%0" : "=r" (selfpc)); \ 94 /* \ 95 * frompc = pc pushed by call to mcount's caller. \ 96 * The caller's stack frame has already been built, so %ebp is \ 97 * the caller's frame pointer. The caller's raddr is in the \ 98 * caller's frame following the caller's caller's frame pointer.\ 99 */ \ 100 __asm("movq (%%rbp),%0" : "=r" (frompc)); \ 101 frompc = ((uintfptr_t *)frompc)[1]; \ 102 _mcount(frompc, selfpc); \ 103 } 104 #else /* __GNUC__ */ 105 #define MCOUNT \ 106 void \ 107 mcount() \ 108 { \ 109 } 110 #endif /* __GNUC__ */ 111 112 typedef unsigned long uintfptr_t; 113 114 #endif /* _KERNEL */ 115 116 /* 117 * An unsigned integral type that can hold non-negative difference between 118 * function pointers. 119 */ 120 typedef u_int fptrdiff_t; 121 122 #ifdef _KERNEL 123 124 void mcount(uintfptr_t frompc, uintfptr_t selfpc); 125 void kmupetext(uintfptr_t nhighpc); 126 127 #ifdef GUPROF 128 struct gmonparam; 129 130 void nullfunc_loop_profiled(void); 131 void nullfunc_profiled(void); 132 void startguprof(struct gmonparam *p); 133 void stopguprof(struct gmonparam *p); 134 #else 135 #define startguprof(p) 136 #define stopguprof(p) 137 #endif /* GUPROF */ 138 139 #else /* !_KERNEL */ 140 141 #include <sys/cdefs.h> 142 143 __BEGIN_DECLS 144 #ifdef __GNUC__ 145 void mcount(void) __asm(".mcount"); 146 #endif 147 __END_DECLS 148 149 #endif /* _KERNEL */ 150 151 #ifdef GUPROF 152 /* XXX doesn't quite work outside kernel yet. */ 153 extern int cputime_bias; 154 155 __BEGIN_DECLS 156 int cputime(void); 157 void empty_loop(void); 158 void mexitcount(uintfptr_t selfpc); 159 void nullfunc(void); 160 void nullfunc_loop(void); 161 __END_DECLS 162 #endif 163 164 #endif /* !_MACHINE_PROFILE_H_ */ 165