asm.h revision 1.9.2.1
1 /* $NetBSD: asm.h,v 1.9.2.1 2007/08/28 16:49:15 matt 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 * from: @(#)asm.h 5.5 (Berkeley) 5/7/91 35 */ 36 37 #ifndef _ARM32_ASM_H_ 38 #define _ARM32_ASM_H_ 39 40 #include <arm/cdefs.h> 41 42 #ifdef __ELF__ 43 # define _C_LABEL(x) x 44 #else 45 # ifdef __STDC__ 46 # define _C_LABEL(x) _ ## x 47 # else 48 # define _C_LABEL(x) _/**/x 49 # endif 50 #endif 51 #define _ASM_LABEL(x) x 52 53 #ifdef __STDC__ 54 # define __CONCAT(x,y) x ## y 55 # define __STRING(x) #x 56 #else 57 # define __CONCAT(x,y) x/**/y 58 # define __STRING(x) "x" 59 #endif 60 61 #ifndef _ALIGN_TEXT 62 # define _ALIGN_TEXT .align 0 63 #endif 64 65 /* 66 * gas/arm uses @ as a single comment character and thus cannot be used here 67 * Instead it recognised the # instead of an @ symbols in .type directives 68 * We define a couple of macros so that assembly code will not be dependant 69 * on one or the other. 70 */ 71 #define _ASM_TYPE_FUNCTION %function 72 #define _ASM_TYPE_OBJECT %object 73 #ifdef __thumb__ 74 #define _ENTRY(x) \ 75 .text; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; .thumb_func; x: 76 #else 77 #define _ENTRY(x) \ 78 .text; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; x: 79 #endif 80 #define _END(x) .size x,.-x 81 82 #ifdef GPROF 83 # ifdef __ELF__ 84 # define _PROF_PROLOGUE \ 85 mov ip, lr; bl __mcount 86 # else 87 # define _PROF_PROLOGUE \ 88 mov ip,lr; bl mcount 89 # endif 90 #else 91 # define _PROF_PROLOGUE 92 #endif 93 94 #define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 95 #define ENTRY_NP(y) _ENTRY(_C_LABEL(y)) 96 #define END(y) _END(_C_LABEL(y)) 97 #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 98 #define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y)) 99 #define ASEND(y) _END(_ASM_LABEL(y)) 100 101 #define ASMSTR .asciz 102 103 #if defined(__ELF__) && defined(PIC) 104 #ifdef __thumb__ 105 #define PLT_SYM(x) x 106 #define GOT_SYM(x) PIC_SYM(x, GOTOFF) 107 #define GOT_GET(x,got,sym) \ 108 ldr x, sym; \ 109 add x, got; \ 110 ldr x, [x] 111 #else 112 #define PLT_SYM(x) PIC_SYM(x, PLT) 113 #define GOT_SYM(x) PIC_SYM(x, GOT) 114 #define GOT_GET(x,got,sym) \ 115 ldr x, sym; \ 116 ldr x, [x, got] 117 #endif /* __thumb__ */ 118 119 #define GOT_INIT(got,gotsym,pclabel) \ 120 ldr got, gotsym; \ 121 add got, got, pc; \ 122 pclabel: 123 #define GOT_INITSYM(gotsym,pclabel) \ 124 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) + (. - (pclabel+4)) 125 126 #ifdef __STDC__ 127 #define PIC_SYM(x,y) x ## ( ## y ## ) 128 #else 129 #define PIC_SYM(x,y) x/**/(/**/y/**/) 130 #endif 131 132 #else 133 #define PLT_SYM(x) x 134 #define GOT_SYM(x) x 135 #define GOT_GET(x,got,sym) \ 136 ldr x, sym; 137 #define GOT_INIT(got,gotsym,pclabel) 138 #define GOT_INITSYM(gotsym,pclabel) 139 #define PIC_SYM(x,y) x 140 #endif /* ELF && PIC */ 141 142 #ifdef __ELF__ 143 #define RCSID(x) .section ".ident"; .asciz x 144 #else 145 #define RCSID(x) .text; .asciz x 146 #endif 147 148 #ifdef __ELF__ 149 #define WEAK_ALIAS(alias,sym) \ 150 .weak alias; \ 151 alias = sym 152 #endif 153 154 /* 155 * STRONG_ALIAS: create a strong alias. 156 */ 157 #define STRONG_ALIAS(alias,sym) \ 158 .globl alias; \ 159 alias = sym 160 161 #ifdef __STDC__ 162 #define WARN_REFERENCES(sym,msg) \ 163 .stabs msg ## ,30,0,0,0 ; \ 164 .stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0 165 #elif defined(__ELF__) 166 #define WARN_REFERENCES(sym,msg) \ 167 .stabs msg,30,0,0,0 ; \ 168 .stabs __STRING(sym),1,0,0,0 169 #else 170 #define WARN_REFERENCES(sym,msg) \ 171 .stabs msg,30,0,0,0 ; \ 172 .stabs __STRING(_/**/sym),1,0,0,0 173 #endif /* __STDC__ */ 174 175 #ifdef __thumb__ 176 # define XPUSH push 177 # define XPOP pop 178 # define XPOPRET pop {pc} 179 #else 180 # define XPUSH stmfd sp!, 181 # define XPOP ldmfd sp!, 182 # ifdef _ARM_ARCH_5 183 # define XPOPRET ldmfd sp!, {pc} 184 # else 185 # define XPOPRET ldmfd sp!, {lr}; mov pc, lr 186 # endif 187 #endif 188 189 #if defined (_ARM_ARCH_4T) 190 # define RET bx lr 191 # define RETc(c) __CONCAT(bx,c) lr 192 #else 193 # define RET mov pc, lr 194 # define RETc(c) __CONCAT(mov,c) pc, lr 195 #endif 196 197 #endif /* !_ARM_ASM_H_ */ 198
Indexes created Thu Oct 02 14:10:14 GMT 2025