profile.h revision 134398
1116742Ssam/* 2116904Ssam * Copyright (c) 1992, 1993 3186904Ssam * The Regents of the University of California. All rights reserved. 4116742Ssam * 5116742Ssam * Redistribution and use in source and binary forms, with or without 6116742Ssam * modification, are permitted provided that the following conditions 7116742Ssam * are met: 8116742Ssam * 1. Redistributions of source code must retain the above copyright 9116742Ssam * notice, this list of conditions and the following disclaimer. 10116742Ssam * 2. Redistributions in binary form must reproduce the above copyright 11116742Ssam * notice, this list of conditions and the following disclaimer in the 12116742Ssam * documentation and/or other materials provided with the distribution. 13116742Ssam * 4. Neither the name of the University nor the names of its contributors 14116742Ssam * may be used to endorse or promote products derived from this software 15116904Ssam * without specific prior written permission. 16116904Ssam * 17116904Ssam * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18116904Ssam * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19116904Ssam * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20116904Ssam * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21116904Ssam * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22116904Ssam * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23116904Ssam * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24116904Ssam * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25116904Ssam * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26116742Ssam * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27116742Ssam * SUCH DAMAGE. 28116742Ssam * 29116742Ssam * @(#)profile.h 8.1 (Berkeley) 6/11/93 30116742Ssam * $FreeBSD: head/sys/amd64/include/profile.h 134398 2004-08-27 19:42:35Z marcel $ 31116742Ssam */ 32116742Ssam 33116742Ssam#ifndef _MACHINE_PROFILE_H_ 34138568Ssam#define _MACHINE_PROFILE_H_ 35201793Strasz 36138568Ssam#ifdef _KERNEL 37201793Strasz 38138568Ssam/* 39201793Strasz * Config generates something to tell the compiler to align functions on 16 40138568Ssam * byte boundaries. A strict alignment is good for keeping the tables small. 41138568Ssam */ 42138568Ssam#define FUNCTION_ALIGNMENT 16 43138568Ssam 44138568Ssam/* 45138568Ssam * The kernel uses assembler stubs instead of unportable inlines. 46116742Ssam * This is mainly to save a little time when profiling is not enabled, 47195379Ssam * which is the usual case for the kernel. 48116742Ssam */ 49178354Ssam#define _MCOUNT_DECL void mcount 50121180Ssam#define MCOUNT 51190532Ssam 52184288Ssam#ifdef GUPROF 53116742Ssam#define MCOUNT_DECL(s) 54116742Ssam#define MCOUNT_ENTER(s) 55192468Ssam#define MCOUNT_EXIT(s) 56170530Ssam#ifdef __GNUC__ 57116742Ssam#define MCOUNT_OVERHEAD(label) \ 58251766Seadler __asm __volatile("pushq %0; call __mcount; popq %%rcx" \ 59138568Ssam : \ 60116742Ssam : "i" (profil) \ 61138568Ssam : "ax", "dx", "cx", "di", "si", "r8", "r9", "memory") 62140754Ssam#define MEXITCOUNT_OVERHEAD() \ 63116742Ssam __asm __volatile("call .mexitcount; 1:" \ 64153349Ssam : : \ 65155688Ssam : "ax", "dx", "cx", "di", "si", "r8", "r9", "memory") 66153349Ssam#define MEXITCOUNT_OVERHEAD_GETLABEL(labelp) \ 67170530Ssam __asm __volatile("movq $1b,%0" : "=rm" (labelp)) 68170530Ssam#elif defined(lint) 69170530Ssam#define MCOUNT_OVERHEAD(label) 70170530Ssam#define MEXITCOUNT_OVERHEAD() 71170530Ssam#define MEXITCOUNT_OVERHEAD_GETLABEL() 72170530Ssam#else 73170530Ssam#error 74170530Ssam#endif /* __GNUC */ 75170530Ssam#else /* !GUPROF */ 76138568Ssam#define MCOUNT_DECL(s) u_long s; 77138568Ssam#ifdef SMP 78116742Ssamextern int mcount_lock; 79178354Ssam#define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); \ 80178354Ssam while (!atomic_cmpset_acq_int(&mcount_lock, 0, 1)) \ 81148290Ssam /* nothing */ ; } 82148291Ssam#define MCOUNT_EXIT(s) { atomic_store_rel_int(&mcount_lock, 0); \ 83148291Ssam write_rflags(s); } 84148291Ssam#else 85167242Ssam#define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); } 86167242Ssam#define MCOUNT_EXIT(s) (write_rflags(s)) 87167242Ssam#endif 88140754Ssam#endif /* GUPROF */ 89178354Ssam 90178354Ssamvoid bintr(void); 91178354Ssamvoid btrap(void); 92178354Ssamvoid eintr(void); 93178354Ssamvoid user(void); 94178354Ssam 95178354Ssam#define MCOUNT_FROMPC_USER(pc) \ 96178354Ssam ((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? (uintfptr_t)user : pc) 97116742Ssam 98178354Ssam#define MCOUNT_FROMPC_INTR(pc) \ 99178354Ssam ((pc >= (uintfptr_t)btrap && pc < (uintfptr_t)eintr) ? \ 100178354Ssam ((pc >= (uintfptr_t)bintr) ? (uintfptr_t)bintr : \ 101178354Ssam (uintfptr_t)btrap) : ~0UL) 102178354Ssam 103178354Ssam#else /* !_KERNEL */ 104178354Ssam 105178354Ssam#define FUNCTION_ALIGNMENT 4 106178354Ssam 107178354Ssam#define _MCOUNT_DECL \ 108178354Ssamstatic void _mcount(uintfptr_t frompc, uintfptr_t selfpc) __used; \ 109178354Ssamstatic void _mcount 110178354Ssam 111186904Ssam#ifdef __GNUC__ 112190579Ssam#define MCOUNT __asm(" \n\ 113191554Ssam .globl .mcount \n\ 114191554Ssam .type .mcount @function \n\ 115191753Ssam.mcount: \n\ 116195377Ssam pushq %rbp \n\ 117186904Ssam movq %rsp,%rbp \n\ 118138568Ssam pushq %rdi \n\ 119283531Sglebius pushq %rsi \n\ 120283527Sglebius pushq %rdx \n\ 121170530Ssam pushq %rcx \n\ 122248069Sadrian pushq %r8 \n\ 123286410Sglebius pushq %r9 \n\ 124178354Ssam pushq %rax \n\ 125170530Ssam movq 8(%rbp),%rsi \n\ 126170530Ssam movq (%rbp),%rdi \n\ 127170530Ssam movq 8(%rdi),%rdi \n\ 128178354Ssam call _mcount \n\ 129191746Sthompsa popq %rax \n\ 130178354Ssam popq %r9 \n\ 131191746Sthompsa popq %r8 \n\ 132191746Sthompsa popq %rcx \n\ 133191746Sthompsa popq %rdx \n\ 134191746Sthompsa popq %rsi \n\ 135233452Sadrian popq %rdi \n\ 136127648Ssam leave \n\ 137283567Sglebius ret \n\ 138283567Sglebius .size .mcount, . - .mcount"); 139283567Sglebius#if 0 140170530Ssam/* 141170530Ssam * We could use this, except it doesn't preserve the registers that were 142193655Ssam * being passed with arguments to the function that we were inserted 143173273Ssam * into. I've left it here as documentation of what the code above is 144170530Ssam * supposed to do. 145173273Ssam */ 146205513Srpaulo#define MCOUNT \ 147178354Ssamvoid \ 148170530Ssammcount() \ 149178354Ssam{ \ 150178354Ssam uintfptr_t selfpc, frompc; \ 151178354Ssam /* \ 152178354Ssam * Find the return address for mcount, \ 153286410Sglebius * and the return address for mcount's caller. \ 154170530Ssam * \ 155170530Ssam * selfpc = pc pushed by call to mcount \ 156170530Ssam */ \ 157170530Ssam __asm("movq 8(%%rbp),%0" : "=r" (selfpc)); \ 158178354Ssam /* \ 159170530Ssam * frompc = pc pushed by call to mcount's caller. \ 160170530Ssam * The caller's stack frame has already been built, so %rbp is \ 161170530Ssam * the caller's frame pointer. The caller's raddr is in the \ 162170530Ssam * caller's frame following the caller's caller's frame pointer.\ 163170530Ssam */ \ 164170530Ssam __asm("movq (%%rbp),%0" : "=r" (frompc)); \ 165170530Ssam frompc = ((uintfptr_t *)frompc)[1]; \ 166170530Ssam _mcount(frompc, selfpc); \ 167170530Ssam} 168170530Ssam#endif 169170530Ssam#else /* !__GNUC__ */ 170170530Ssam#define MCOUNT \ 171170530Ssamvoid \ 172170530Ssammcount() \ 173170530Ssam{ \ 174170530Ssam} 175170530Ssam#endif /* __GNUC__ */ 176170530Ssam 177170530Ssamtypedef u_long uintfptr_t; 178170530Ssam 179170530Ssam#endif /* _KERNEL */ 180170530Ssam 181186107Ssam/* 182170530Ssam * An unsigned integral type that can hold non-negative difference between 183170530Ssam * function pointers. 184170530Ssam */ 185170530Ssamtypedef u_long fptrdiff_t; 186190532Ssam 187170530Ssam#ifdef _KERNEL 188170530Ssam 189178354Ssamvoid mcount(uintfptr_t frompc, uintfptr_t selfpc); 190178354Ssam 191178354Ssam#else /* !_KERNEL */ 192170530Ssam 193178354Ssam#include <sys/cdefs.h> 194178354Ssam 195193439Ssam__BEGIN_DECLS 196193439Ssam#ifdef __GNUC__ 197178354Ssamvoid mcount(void) __asm(".mcount"); 198178354Ssam#endif 199170530Ssam__END_DECLS 200284143Sadrian 201170530Ssam#endif /* _KERNEL */ 202170530Ssam 203170530Ssam#endif /* !_MACHINE_PROFILE_H_ */ 204178354Ssam