| 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_ */ |