profile.h revision 163735
1168404Spjd/*- 2168404Spjd * Copyright (c) 1992, 1993 3168404Spjd * The Regents of the University of California. All rights reserved. 4168404Spjd * 5168404Spjd * Redistribution and use in source and binary forms, with or without 6168404Spjd * modification, are permitted provided that the following conditions 7168404Spjd * are met: 8168404Spjd * 1. Redistributions of source code must retain the above copyright 9168404Spjd * notice, this list of conditions and the following disclaimer. 10168404Spjd * 2. Redistributions in binary form must reproduce the above copyright 11168404Spjd * notice, this list of conditions and the following disclaimer in the 12168404Spjd * documentation and/or other materials provided with the distribution. 13168404Spjd * 4. Neither the name of the University nor the names of its contributors 14168404Spjd * may be used to endorse or promote products derived from this software 15168404Spjd * without specific prior written permission. 16168404Spjd * 17168404Spjd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18168404Spjd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19168404Spjd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20168404Spjd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21168404Spjd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22168404Spjd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23168404Spjd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24168404Spjd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25168404Spjd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26168404Spjd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27168404Spjd * SUCH DAMAGE. 28168404Spjd * 29168404Spjd * @(#)profile.h 8.1 (Berkeley) 6/11/93 30169303Spjd * $FreeBSD: head/sys/amd64/include/profile.h 163735 2006-10-28 11:03:03Z bde $ 31168404Spjd */ 32168404Spjd 33168404Spjd#ifndef _MACHINE_PROFILE_H_ 34168404Spjd#define _MACHINE_PROFILE_H_ 35168404Spjd 36169303Spjd#ifndef _SYS_CDEFS_H_ 37168404Spjd#error this file needs sys/cdefs.h as a prerequisite 38168404Spjd#endif 39168404Spjd 40168404Spjd#ifdef _KERNEL 41168404Spjd 42168404Spjd/* 43168404Spjd * Config generates something to tell the compiler to align functions on 16 44168404Spjd * byte boundaries. A strict alignment is good for keeping the tables small. 45168404Spjd */ 46168404Spjd#define FUNCTION_ALIGNMENT 16 47168404Spjd 48168404Spjd/* 49168404Spjd * The kernel uses assembler stubs instead of unportable inlines. 50168404Spjd * This is mainly to save a little time when profiling is not enabled, 51168404Spjd * which is the usual case for the kernel. 52168404Spjd */ 53168404Spjd#define _MCOUNT_DECL void mcount 54168404Spjd#define MCOUNT 55168404Spjd 56168404Spjd#ifdef GUPROF 57168404Spjd#define MCOUNT_DECL(s) 58168404Spjd#define MCOUNT_ENTER(s) 59168404Spjd#define MCOUNT_EXIT(s) 60168404Spjd#ifdef __GNUCLIKE_ASM 61168404Spjd#define MCOUNT_OVERHEAD(label) \ 62168404Spjd __asm __volatile("pushq %0; call __mcount; popq %%rcx" \ 63168404Spjd : \ 64168404Spjd : "i" (label) \ 65168404Spjd : "ax", "dx", "cx", "di", "si", "r8", "r9", "memory") 66168404Spjd#define MEXITCOUNT_OVERHEAD() \ 67168404Spjd __asm __volatile("call .mexitcount; 1:" \ 68168404Spjd : : \ 69168404Spjd : "ax", "dx", "cx", "di", "si", "r8", "r9", "memory") 70168404Spjd#define MEXITCOUNT_OVERHEAD_GETLABEL(labelp) \ 71168404Spjd __asm __volatile("movq $1b,%0" : "=rm" (labelp)) 72168404Spjd#elif defined(lint) 73168404Spjd#define MCOUNT_OVERHEAD(label) 74168404Spjd#define MEXITCOUNT_OVERHEAD() 75168404Spjd#define MEXITCOUNT_OVERHEAD_GETLABEL() 76168404Spjd#else 77168404Spjd#error this file needs to be ported to your compiler 78168404Spjd#endif /* !__GNUCLIKE_ASM */ 79168404Spjd#else /* !GUPROF */ 80168404Spjd#define MCOUNT_DECL(s) u_long s; 81168404Spjd#ifdef SMP 82168404Spjdextern int mcount_lock; 83168404Spjd#define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); \ 84168404Spjd while (!atomic_cmpset_acq_int(&mcount_lock, 0, 1)) \ 85168404Spjd /* nothing */ ; } 86168404Spjd#define MCOUNT_EXIT(s) { atomic_store_rel_int(&mcount_lock, 0); \ 87168404Spjd write_rflags(s); } 88169303Spjd#else 89169303Spjd#define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); } 90169087Spjd#define MCOUNT_EXIT(s) (write_rflags(s)) 91168404Spjd#endif 92168404Spjd#endif /* GUPROF */ 93168404Spjd 94168404Spjdvoid bintr(void); 95168404Spjdvoid btrap(void); 96169087Spjdvoid eintr(void); 97168404Spjdvoid user(void); 98168404Spjd 99185029Spjd#define MCOUNT_FROMPC_USER(pc) \ 100185029Spjd ((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? (uintfptr_t)user : pc) 101185029Spjd 102168404Spjd#define MCOUNT_FROMPC_INTR(pc) \ 103168404Spjd ((pc >= (uintfptr_t)btrap && pc < (uintfptr_t)eintr) ? \ 104168404Spjd ((pc >= (uintfptr_t)bintr) ? (uintfptr_t)bintr : \ 105168404Spjd (uintfptr_t)btrap) : ~0UL) 106168404Spjd 107168404Spjd#else /* !_KERNEL */ 108168404Spjd 109168404Spjd#define FUNCTION_ALIGNMENT 4 110168404Spjd 111168404Spjd#define _MCOUNT_DECL \ 112168404Spjdstatic void _mcount(uintfptr_t frompc, uintfptr_t selfpc) __used; \ 113168404Spjdstatic void _mcount 114168404Spjd 115169303Spjd#ifdef __GNUCLIKE_ASM 116169303Spjd#define MCOUNT __asm(" \n\ 117169303Spjd .globl .mcount \n\ 118169303Spjd .type .mcount @function \n\ 119169303Spjd.mcount: \n\ 120168404Spjd pushq %rbp \n\ 121168404Spjd movq %rsp,%rbp \n\ 122168404Spjd pushq %rdi \n\ 123168404Spjd pushq %rsi \n\ 124168404Spjd pushq %rdx \n\ 125168404Spjd pushq %rcx \n\ 126168404Spjd pushq %r8 \n\ 127168404Spjd pushq %r9 \n\ 128168404Spjd pushq %rax \n\ 129168404Spjd movq 8(%rbp),%rsi \n\ 130168404Spjd movq (%rbp),%rdi \n\ 131168404Spjd movq 8(%rdi),%rdi \n\ 132168404Spjd call _mcount \n\ 133168404Spjd popq %rax \n\ 134168404Spjd popq %r9 \n\ 135168404Spjd popq %r8 \n\ 136168404Spjd popq %rcx \n\ 137168404Spjd popq %rdx \n\ 138168404Spjd popq %rsi \n\ 139168404Spjd popq %rdi \n\ 140168404Spjd leave \n\ 141168404Spjd ret \n\ 142168404Spjd .size .mcount, . - .mcount"); 143168404Spjd#if 0 144168404Spjd/* 145168404Spjd * We could use this, except it doesn't preserve the registers that were 146168404Spjd * being passed with arguments to the function that we were inserted 147168404Spjd * into. I've left it here as documentation of what the code above is 148168404Spjd * supposed to do. 149168404Spjd */ 150168404Spjd#define MCOUNT \ 151168404Spjdvoid \ 152168404Spjdmcount() \ 153168404Spjd{ \ 154168404Spjd uintfptr_t selfpc, frompc; \ 155168404Spjd /* \ 156168404Spjd * Find the return address for mcount, \ 157168404Spjd * and the return address for mcount's caller. \ 158168404Spjd * \ 159168404Spjd * selfpc = pc pushed by call to mcount \ 160168404Spjd */ \ 161168404Spjd __asm("movq 8(%%rbp),%0" : "=r" (selfpc)); \ 162168404Spjd /* \ 163168404Spjd * frompc = pc pushed by call to mcount's caller. \ 164168404Spjd * The caller's stack frame has already been built, so %rbp is \ 165168404Spjd * the caller's frame pointer. The caller's raddr is in the \ 166168404Spjd * caller's frame following the caller's caller's frame pointer.\ 167168404Spjd */ \ 168168404Spjd __asm("movq (%%rbp),%0" : "=r" (frompc)); \ 169168404Spjd frompc = ((uintfptr_t *)frompc)[1]; \ 170168404Spjd _mcount(frompc, selfpc); \ 171168404Spjd} 172168404Spjd#endif 173168404Spjd#else /* !__GNUCLIKE_ASM */ 174168404Spjd#define MCOUNT 175168404Spjd#endif /* __GNUCLIKE_ASM */ 176168404Spjd 177168404Spjdtypedef u_long uintfptr_t; 178168404Spjd 179168404Spjd#endif /* _KERNEL */ 180168404Spjd 181168404Spjd/* 182168404Spjd * An unsigned integral type that can hold non-negative difference between 183168404Spjd * function pointers. 184168404Spjd */ 185168404Spjdtypedef u_long fptrdiff_t; 186168404Spjd 187168404Spjd#ifdef _KERNEL 188168404Spjd 189168404Spjdvoid mcount(uintfptr_t frompc, uintfptr_t selfpc); 190168404Spjd 191168404Spjd#else /* !_KERNEL */ 192168404Spjd 193168404Spjd#include <sys/cdefs.h> 194168404Spjd 195168404Spjd__BEGIN_DECLS 196168404Spjd#ifdef __GNUCLIKE_ASM 197168404Spjdvoid mcount(void) __asm(".mcount"); 198168404Spjd#endif 199168404Spjd__END_DECLS 200168404Spjd 201168404Spjd#endif /* _KERNEL */ 202168404Spjd 203168404Spjd#endif /* !_MACHINE_PROFILE_H_ */ 204168404Spjd