profile.h revision 1.20
1/* $NetBSD: profile.h,v 1.20 2021/04/17 20:12:55 rillig 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 __x86_64__ 35 36#ifdef _KERNEL_OPT 37#include "opt_xen.h" 38#endif 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 XENPV 83static inline void 84mcount_disable_intr(void) 85{ 86 /* should be __cli() but this calls x86_lfence() which calls mcount */ 87 curcpu()->ci_vcpu->evtchn_upcall_mask = 1; 88 __asm volatile("lfence" ::: "memory"); /* x86_lfence() */ 89} 90 91static inline u_long 92mcount_read_psl(void) 93{ 94 return (curcpu()->ci_vcpu->evtchn_upcall_mask); 95} 96 97static inline void 98mcount_write_psl(u_long psl) 99{ 100 curcpu()->ci_vcpu->evtchn_upcall_mask = psl; 101 /* can't call x86_lfence because it calls mcount() */ 102 __asm volatile("lfence" ::: "memory"); /* x86_lfence() */ 103 /* XXX can't call hypervisor_force_callback() because we're in mcount*/ 104} 105 106#else /* XENPV */ 107static inline void 108mcount_disable_intr(void) 109{ 110 __asm volatile("cli"); 111} 112 113static inline u_long 114mcount_read_psl(void) 115{ 116 u_long ef; 117 118 __asm volatile("pushfq; popq %0" : "=r" (ef)); 119 return (ef); 120} 121 122static inline void 123mcount_write_psl(u_long ef) 124{ 125 __asm volatile("pushq %0; popfq" : : "r" (ef)); 126} 127 128#endif /* XENPV */ 129 130#define MCOUNT_ENTER \ 131 do { s = (int)mcount_read_psl(); mcount_disable_intr(); } while (0) 132#define MCOUNT_EXIT do { mcount_write_psl(s); } while (0) 133 134#endif /* _KERNEL */ 135 136#else /* __x86_64__ */ 137 138#include <i386/profile.h> 139 140#endif /* __x86_64__ */ 141