profile.h revision 163738
1169691Skan/*- 2169691Skan * Copyright (c) 1992, 1993 3169691Skan * The Regents of the University of California. All rights reserved. 4169691Skan * 5169691Skan * Redistribution and use in source and binary forms, with or without 6169691Skan * modification, are permitted provided that the following conditions 7169691Skan * are met: 8169691Skan * 1. Redistributions of source code must retain the above copyright 9169691Skan * notice, this list of conditions and the following disclaimer. 10169691Skan * 2. Redistributions in binary form must reproduce the above copyright 11169691Skan * notice, this list of conditions and the following disclaimer in the 12169691Skan * documentation and/or other materials provided with the distribution. 13169691Skan * 4. Neither the name of the University nor the names of its contributors 14169691Skan * may be used to endorse or promote products derived from this software 15169691Skan * without specific prior written permission. 16169691Skan * 17169691Skan * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18169691Skan * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19169691Skan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20169691Skan * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21169691Skan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22169691Skan * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23169691Skan * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24169691Skan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25169691Skan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26169691Skan * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27169691Skan * SUCH DAMAGE. 28169691Skan * 29169691Skan * @(#)profile.h 8.1 (Berkeley) 6/11/93 30169691Skan * $FreeBSD: head/sys/amd64/include/profile.h 163738 2006-10-28 13:12:06Z bde $ 31169691Skan */ 32169691Skan 33169691Skan#ifndef _MACHINE_PROFILE_H_ 34169691Skan#define _MACHINE_PROFILE_H_ 35169691Skan 36169691Skan#ifndef _SYS_CDEFS_H_ 37169691Skan#error this file needs sys/cdefs.h as a prerequisite 38169691Skan#endif 39169691Skan 40169691Skan#ifdef _KERNEL 41169691Skan 42169691Skan/* 43169691Skan * Config generates something to tell the compiler to align functions on 16 44169691Skan * byte boundaries. A strict alignment is good for keeping the tables small. 45169691Skan */ 46169691Skan#define FUNCTION_ALIGNMENT 16 47169691Skan 48169691Skan/* 49169691Skan * The kernel uses assembler stubs instead of unportable inlines. 50169691Skan * This is mainly to save a little time when profiling is not enabled, 51169691Skan * which is the usual case for the kernel. 52169691Skan */ 53169691Skan#define _MCOUNT_DECL void mcount 54169691Skan#define MCOUNT 55169691Skan 56169691Skan#ifdef GUPROF 57169691Skan#define MCOUNT_DECL(s) 58169691Skan#define MCOUNT_ENTER(s) 59169691Skan#define MCOUNT_EXIT(s) 60169691Skan#ifdef __GNUCLIKE_ASM 61169691Skan#define MCOUNT_OVERHEAD(label) \ 62169691Skan __asm __volatile("pushq %0; call __mcount; popq %%rcx" \ 63169691Skan : \ 64169691Skan : "i" (label) \ 65169691Skan : "ax", "dx", "cx", "di", "si", "r8", "r9", "memory") 66169691Skan#define MEXITCOUNT_OVERHEAD() \ 67169691Skan __asm __volatile("call .mexitcount; 1:" \ 68169691Skan : : \ 69169691Skan : "ax", "dx", "cx", "di", "si", "r8", "r9", "memory") 70169691Skan#define MEXITCOUNT_OVERHEAD_GETLABEL(labelp) \ 71169691Skan __asm __volatile("movq $1b,%0" : "=rm" (labelp)) 72169691Skan#elif defined(lint) 73169691Skan#define MCOUNT_OVERHEAD(label) 74169691Skan#define MEXITCOUNT_OVERHEAD() 75169691Skan#define MEXITCOUNT_OVERHEAD_GETLABEL() 76169691Skan#else 77169691Skan#error this file needs to be ported to your compiler 78169691Skan#endif /* !__GNUCLIKE_ASM */ 79169691Skan#else /* !GUPROF */ 80169691Skan#define MCOUNT_DECL(s) u_long s; 81169691Skan#ifdef SMP 82169691Skanextern int mcount_lock; 83169691Skan#define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); \ 84169691Skan while (!atomic_cmpset_acq_int(&mcount_lock, 0, 1)) \ 85169691Skan /* nothing */ ; } 86169691Skan#define MCOUNT_EXIT(s) { atomic_store_rel_int(&mcount_lock, 0); \ 87169691Skan write_rflags(s); } 88169691Skan#else 89169691Skan#define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); } 90169691Skan#define MCOUNT_EXIT(s) (write_rflags(s)) 91169691Skan#endif 92169691Skan#endif /* GUPROF */ 93169691Skan 94169691Skanvoid bintr(void); 95169691Skanvoid btrap(void); 96169691Skanvoid eintr(void); 97169691Skanvoid user(void); 98169691Skan 99169691Skan#define MCOUNT_FROMPC_USER(pc) \ 100169691Skan ((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? (uintfptr_t)user : pc) 101169691Skan 102169691Skan#define MCOUNT_FROMPC_INTR(pc) \ 103169691Skan ((pc >= (uintfptr_t)btrap && pc < (uintfptr_t)eintr) ? \ 104169691Skan ((pc >= (uintfptr_t)bintr) ? (uintfptr_t)bintr : \ 105169691Skan (uintfptr_t)btrap) : ~0UL) 106169691Skan 107169691Skan#else /* !_KERNEL */ 108169691Skan 109169691Skan#define FUNCTION_ALIGNMENT 4 110169691Skan 111169691Skan#define _MCOUNT_DECL \ 112169691Skanstatic void _mcount(uintfptr_t frompc, uintfptr_t selfpc) __used; \ 113169691Skanstatic void _mcount 114169691Skan 115169691Skan#ifdef __GNUCLIKE_ASM 116169691Skan#define MCOUNT __asm(" \n\ 117169691Skan .text \n\ 118169691Skan .p2align 4,0x90 \n\ 119169691Skan .globl .mcount \n\ 120169691Skan .type .mcount,@function \n\ 121169691Skan.mcount: \n\ 122169691Skan pushq %rdi \n\ 123169691Skan pushq %rsi \n\ 124169691Skan pushq %rdx \n\ 125169691Skan pushq %rcx \n\ 126169691Skan pushq %r8 \n\ 127169691Skan pushq %r9 \n\ 128169691Skan pushq %rax \n\ 129169691Skan movq 8(%rbp),%rdi \n\ 130169691Skan movq 7*8(%rsp),%rsi \n\ 131169691Skan call _mcount \n\ 132169691Skan popq %rax \n\ 133169691Skan popq %r9 \n\ 134169691Skan popq %r8 \n\ 135169691Skan popq %rcx \n\ 136169691Skan popq %rdx \n\ 137169691Skan popq %rsi \n\ 138169691Skan popq %rdi \n\ 139169691Skan ret \n\ 140169691Skan .size .mcount, . - .mcount"); 141169691Skan#if 0 142169691Skan/* 143169691Skan * We could use this, except it doesn't preserve the registers that were 144169691Skan * being passed with arguments to the function that we were inserted 145169691Skan * into. I've left it here as documentation of what the code above is 146169691Skan * supposed to do. 147169691Skan */ 148169691Skan#define MCOUNT \ 149169691Skanvoid \ 150169691Skanmcount() \ 151169691Skan{ \ 152169691Skan uintfptr_t selfpc, frompc; \ 153169691Skan /* \ 154169691Skan * Find the return address for mcount, \ 155169691Skan * and the return address for mcount's caller. \ 156169691Skan * \ 157169691Skan * selfpc = pc pushed by call to mcount \ 158169691Skan */ \ 159169691Skan __asm("movq 8(%%rbp),%0" : "=r" (selfpc)); \ 160169691Skan /* \ 161169691Skan * frompc = pc pushed by call to mcount's caller. \ 162169691Skan * The caller's stack frame has already been built, so %rbp is \ 163169691Skan * the caller's frame pointer. The caller's raddr is in the \ 164169691Skan * caller's frame following the caller's caller's frame pointer.\ 165169691Skan */ \ 166169691Skan __asm("movq (%%rbp),%0" : "=r" (frompc)); \ 167169691Skan frompc = ((uintfptr_t *)frompc)[1]; \ 168169691Skan _mcount(frompc, selfpc); \ 169169691Skan} 170169691Skan#endif 171169691Skan#else /* !__GNUCLIKE_ASM */ 172169691Skan#define MCOUNT 173169691Skan#endif /* __GNUCLIKE_ASM */ 174169691Skan 175169691Skantypedef u_long uintfptr_t; 176169691Skan 177169691Skan#endif /* _KERNEL */ 178169691Skan 179169691Skan/* 180169691Skan * An unsigned integral type that can hold non-negative difference between 181169691Skan * function pointers. 182169691Skan */ 183169691Skantypedef u_long fptrdiff_t; 184169691Skan 185169691Skan#ifdef _KERNEL 186169691Skan 187169691Skanvoid mcount(uintfptr_t frompc, uintfptr_t selfpc); 188169691Skan 189169691Skan#else /* !_KERNEL */ 190169691Skan 191169691Skan#include <sys/cdefs.h> 192169691Skan 193169691Skan__BEGIN_DECLS 194169691Skan#ifdef __GNUCLIKE_ASM 195169691Skanvoid mcount(void) __asm(".mcount"); 196169691Skan#endif 197169691Skan__END_DECLS 198169691Skan 199169691Skan#endif /* _KERNEL */ 200169691Skan 201169691Skan#endif /* !_MACHINE_PROFILE_H_ */ 202169691Skan