1 /* $NetBSD: profile.h,v 1.10 2007/10/17 19:53:04 garbled Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)profile.h 8.1 (Berkeley) 6/11/93 32 */ 33 34 #ifdef _KERNEL_OPT 35 #include "opt_multiprocessor.h" 36 #endif 37 38 #include <machine/atomic.h> 39 40 #define _MCOUNT_DECL void _mcount 41 42 #define EPROL_EXPORT __asm(".globl _eprol") 43 44 #ifdef PIC 45 #define __MCPLT "@PLT" 46 #else 47 #define __MCPLT 48 #endif 49 50 #define MCOUNT \ 51 __weak_alias(mcount, __mcount) \ 52 __asm(" .globl __mcount \n" \ 53 " .type __mcount,@function\n" \ 54 "__mcount: \n" \ 55 " pushq %rbp \n" \ 56 " movq %rsp,%rbp \n" \ 57 " subq $56,%rsp \n" \ 58 " movq %rdi,0(%rsp) \n" \ 59 " movq %rsi,8(%rsp) \n" \ 60 " movq %rdx,16(%rsp) \n" \ 61 " movq %rcx,24(%rsp) \n" \ 62 " movq %r8,32(%rsp) \n" \ 63 " movq %r9,40(%rsp) \n" \ 64 " movq %rax,48(%rsp) \n" \ 65 " movq 0(%rbp),%r11 \n" \ 66 " movq 8(%r11),%rdi \n" \ 67 " movq 8(%rbp),%rsi \n" \ 68 " call _mcount"__MCPLT " \n" \ 69 " movq 0(%rsp),%rdi \n" \ 70 " movq 8(%rsp),%rsi \n" \ 71 " movq 16(%rsp),%rdx \n" \ 72 " movq 24(%rsp),%rcx \n" \ 73 " movq 32(%rsp),%r8 \n" \ 74 " movq 40(%rsp),%r9 \n" \ 75 " movq 48(%rsp),%rax \n" \ 76 " leave \n" \ 77 " ret \n" \ 78 " .size __mcount,.-__mcount"); 79 80 81 #ifdef _KERNEL 82 #ifdef MULTIPROCESSOR 83 __cpu_simple_lock_t __mcount_lock; 84 85 static inline void 86 MCOUNT_ENTER_MP(void) 87 { 88 while (x86_atomic_testset_b(&__mcount_lock, __SIMPLELOCK_LOCKED) 89 != __SIMPLELOCK_UNLOCKED) { 90 while (__mcount_lock == __SIMPLELOCK_LOCKED) 91 ; 92 } 93 __insn_barrier(); 94 } 95 96 static inline void 97 MCOUNT_EXIT_MP(void) 98 { 99 __insn_barrier(); 100 __mcount_lock = __SIMPLELOCK_UNLOCKED; 101 } 102 #else 103 #define MCOUNT_ENTER_MP() 104 #define MCOUNT_EXIT_MP() 105 #endif 106 107 static inline void 108 mcount_disable_intr(void) 109 { 110 __asm volatile("cli"); 111 } 112 113 static inline u_long 114 mcount_read_psl(void) 115 { 116 u_long ef; 117 118 __asm volatile("pushfl; popl %0" : "=r" (ef)); 119 return (ef); 120 } 121 122 static inline void 123 mcount_write_psl(u_long ef) 124 { 125 __asm volatile("pushl %0; popfl" : : "r" (ef)); 126 } 127 128 #define MCOUNT_ENTER \ 129 s = (int)mcount_read_psl(); \ 130 mcount_disable_intr(); \ 131 MCOUNT_ENTER_MP(); 132 133 #define MCOUNT_EXIT \ 134 MCOUNT_EXIT_MP(); \ 135 mcount_write_psl(s); 136 137 #endif /* _KERNEL */ 138