Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/i386/include/profile.h
Version:
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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: releng/5.3/sys/i386/include/profile.h 129498 2004-05-20 16:12:19Z bde $ 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 MCOUNT_DECL(s) 54 #define MCOUNT_ENTER(s) 55 #define MCOUNT_EXIT(s) 56 #if defined(__GNUC__) || defined(__INTEL_COMPILER) 57 #define MCOUNT_OVERHEAD(label) \ 58 __asm __volatile("pushl %0; call __mcount; popl %%ecx" \ 59 : \ 60 : "i" (profil) \ 61 : "ax", "dx", "cx", "memory") 62 #define MEXITCOUNT_OVERHEAD() \ 63 __asm __volatile("call .mexitcount; 1:" \ 64 : : \ 65 : "ax", "dx", "cx", "memory") 66 #define MEXITCOUNT_OVERHEAD_GETLABEL(labelp) \ 67 __asm __volatile("movl $1b,%0" : "=rm" (labelp)) 68 #elif defined(lint) 69 #define MCOUNT_OVERHEAD(label) 70 #define MEXITCOUNT_OVERHEAD() 71 #define MEXITCOUNT_OVERHEAD_GETLABEL() 72 #else 73 #error 74 #endif /* !(__GNUC__ || __INTEL_COMPILER) */ 75 #else /* !GUPROF */ 76 #define MCOUNT_DECL(s) u_long s; 77 #ifdef SMP 78 extern int mcount_lock; 79 #define MCOUNT_ENTER(s) { s = read_eflags(); disable_intr(); \ 80 while (!atomic_cmpset_acq_int(&mcount_lock, 0, 1)) \ 81 /* nothing */ ; } 82 #define MCOUNT_EXIT(s) { atomic_store_rel_int(&mcount_lock, 0); \ 83 write_eflags(s); } 84 #else 85 #define MCOUNT_ENTER(s) { s = read_eflags(); disable_intr(); } 86 #define MCOUNT_EXIT(s) (write_eflags(s)) 87 #endif 88 #endif /* GUPROF */ 89 90 #else /* !_KERNEL */ 91 92 #define FUNCTION_ALIGNMENT 4 93 94 #define _MCOUNT_DECL static __inline void _mcount 95 96 #if defined(__GNUC__) || defined(__INTEL_COMPILER) 97 #define MCOUNT \ 98 void \ 99 mcount() \ 100 { \ 101 uintfptr_t selfpc, frompc; \ 102 /* \ 103 * Find the return address for mcount, \ 104 * and the return address for mcount's caller. \ 105 * \ 106 * selfpc = pc pushed by call to mcount \ 107 */ \ 108 __asm("movl 4(%%ebp),%0" : "=r" (selfpc)); \ 109 /* \ 110 * frompc = pc pushed by call to mcount's caller. \ 111 * The caller's stack frame has already been built, so %ebp is \ 112 * the caller's frame pointer. The caller's raddr is in the \ 113 * caller's frame following the caller's caller's frame pointer.\ 114 */ \ 115 __asm("movl (%%ebp),%0" : "=r" (frompc)); \ 116 frompc = ((uintfptr_t *)frompc)[1]; \ 117 _mcount(frompc, selfpc); \ 118 } 119 #else /* !(__GNUC__ || __INTEL_COMPILER) */ 120 void \ 121 #define MCOUNT \ 122 mcount() \ 123 { \ 124 } 125 #endif /* __GNUC__ || __INTEL_COMPILER */ 126 127 typedef u_int uintfptr_t; 128 129 #endif /* _KERNEL */ 130 131 /* 132 * An unsigned integral type that can hold non-negative difference between 133 * function pointers. 134 */ 135 typedef u_int fptrdiff_t; 136 137 #ifdef _KERNEL 138 139 void mcount(uintfptr_t frompc, uintfptr_t selfpc); 140 141 #else /* !_KERNEL */ 142 143 #include <sys/cdefs.h> 144 145 __BEGIN_DECLS 146 #if defined(__GNUC__) || defined(__INTEL_COMPILER) 147 void mcount(void) __asm(".mcount"); 148 #endif 149 __END_DECLS 150 151 #endif /* _KERNEL */ 152 153 #endif /* !_MACHINE_PROFILE_H_ */
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