1 /* $NetBSD: asm.h,v 1.24 2025/01/05 14:30:37 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)asm.h 5.5 (Berkeley) 5/7/91 35 */ 36 37 #ifndef _AMD64_ASM_H_ 38 #define _AMD64_ASM_H_ 39 40 #ifdef __x86_64__ 41 42 #ifdef __PIC__ 43 #define PIC_PLT(x) x@PLT 44 #define PIC_GOT(x) x@GOTPCREL(%rip) 45 #else 46 #define PIC_PLT(x) x 47 #define PIC_GOT(x) x 48 #endif 49 50 #define _C_LABEL(x) x 51 #define _ASM_LABEL(x) x 52 53 #define CVAROFF(x,y) (_C_LABEL(x)+y)(%rip) 54 55 #ifdef __STDC__ 56 # define __CONCAT(x,y) x ## y 57 # define __STRING(x) #x 58 #else 59 # define __CONCAT(x,y) x/**/y 60 # define __STRING(x) "x" 61 #endif 62 63 /* let kernels and others override entrypoint alignment */ 64 #ifndef _ALIGN_TEXT 65 # ifdef _STANDALONE 66 # define _ALIGN_TEXT .align 4 67 # else 68 # define _ALIGN_TEXT .align 16 69 # endif 70 #endif 71 72 #define _ENTRY(x) \ 73 .text; _ALIGN_TEXT; .globl x; .type x,@function; x: 74 #define _LABEL(x) \ 75 .globl x; x: 76 77 #ifdef _KERNEL 78 /* XXX Can't use __CONCAT() here, as it would be evaluated incorrectly. */ 79 #ifdef __STDC__ 80 #define IDTVEC(name) \ 81 ALIGN_TEXT; .globl X ## name; .type X ## name,@function; X ## name: 82 #define IDTVEC_END(name) \ 83 .size X ## name, . - X ## name 84 #else 85 #define IDTVEC(name) \ 86 ALIGN_TEXT; .globl X/**/name; .type X/**/name,@function; X/**/name: 87 #define IDTVEC_END(name) \ 88 .size X/**/name, . - X/**/name 89 #endif /* __STDC__ */ 90 #endif /* _KERNEL */ 91 92 #ifdef __STDC__ 93 #define CPUVAR(off) %gs:CPU_INFO_ ## off 94 #else 95 #define CPUVAR(off) %gs:CPU_INFO_/**/off 96 #endif 97 98 99 #ifdef GPROF 100 # define _PROF_PROLOGUE \ 101 pushq %rbp; leaq (%rsp),%rbp; call PIC_PLT(__mcount); popq %rbp 102 #else 103 # define _PROF_PROLOGUE 104 #endif 105 106 #define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 107 #define NENTRY(y) _ENTRY(_C_LABEL(y)) 108 #define ALTENTRY(x) NENTRY(x) 109 #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 110 #define LABEL(y) _LABEL(_C_LABEL(y)) 111 #define END(y) .size y, . - y 112 113 #define ASMSTR .asciz 114 115 #define _IDENTSTR(x) .pushsection ".ident","MS",@progbits,1; \ 116 x; \ 117 .popsection 118 #ifdef _NETBSD_REVISIONID 119 #define RCSID(_s) \ 120 _IDENTSTR(.asciz _s); \ 121 _IDENTSTR(.ascii "$"; .ascii "NetBSD: "; .ascii __FILE__; .ascii " "; \ 122 .ascii _NETBSD_REVISIONID; .asciz " $") 123 #else 124 #define RCSID(_s) _IDENTSTR(.asciz _s) 125 #endif 126 127 #define WEAK_ALIAS(alias,sym) \ 128 .weak alias; \ 129 alias = sym 130 131 /* 132 * STRONG_ALIAS: create a strong alias. 133 */ 134 #define STRONG_ALIAS(alias,sym) \ 135 .globl alias; \ 136 alias = sym 137 138 #ifdef __STDC__ 139 #define WARN_REFERENCES(sym,msg) \ 140 .pushsection .gnu.warning. ## sym; \ 141 .ascii msg; \ 142 .popsection 143 #else 144 #define WARN_REFERENCES(sym,msg) \ 145 .pushsection .gnu.warning./**/sym; \ 146 .ascii msg; \ 147 .popsection 148 #endif /* __STDC__ */ 149 150 #else /* __x86_64__ */ 151 152 #include <i386/asm.h> 153 154 #endif /* __x86_64__ */ 155 156 #endif /* !_AMD64_ASM_H_ */ 157