asm.h revision 1.15
1 /* $NetBSD: asm.h,v 1.15 2012/08/29 22:25:05 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 #define __BIT(n) (1 << (n)) 43 44 #define _C_LABEL(x) x 45 #define _ASM_LABEL(x) x 46 47 #ifdef __STDC__ 48 # define __CONCAT(x,y) x ## y 49 # define __STRING(x) #x 50 #else 51 # define __CONCAT(x,y) x/**/y 52 # define __STRING(x) "x" 53 #endif 54 55 #ifndef _ALIGN_TEXT 56 # define _ALIGN_TEXT .align 0 57 #endif 58 59 /* 60 * gas/arm uses @ as a single comment character and thus cannot be used here 61 * Instead it recognised the # instead of an @ symbols in .type directives 62 * We define a couple of macros so that assembly code will not be dependent 63 * on one or the other. 64 */ 65 #define _ASM_TYPE_FUNCTION %function 66 #define _ASM_TYPE_OBJECT %object 67 #ifdef __thumb__ 68 #define _ENTRY(x) \ 69 .text; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; .thumb_func; x: 70 #else 71 #define _ENTRY(x) \ 72 .text; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; x: 73 #endif 74 #define _END(x) .size x,.-x 75 76 #ifdef GPROF 77 # define _PROF_PROLOGUE \ 78 mov ip, lr; bl __mcount 79 #else 80 # define _PROF_PROLOGUE 81 #endif 82 83 #define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 84 #define ENTRY_NP(y) _ENTRY(_C_LABEL(y)) 85 #define END(y) _END(_C_LABEL(y)) 86 #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 87 #define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y)) 88 #define ASEND(y) _END(_ASM_LABEL(y)) 89 90 #define ASMSTR .asciz 91 92 #if defined(PIC) 93 #ifdef __thumb__ 94 #define PLT_SYM(x) x 95 #define GOT_SYM(x) PIC_SYM(x, GOTOFF) 96 #define GOT_GET(x,got,sym) \ 97 ldr x, sym; \ 98 add x, got; \ 99 ldr x, [x] 100 #else 101 #define PLT_SYM(x) PIC_SYM(x, PLT) 102 #define GOT_SYM(x) PIC_SYM(x, GOT) 103 #define GOT_GET(x,got,sym) \ 104 ldr x, sym; \ 105 ldr x, [x, got] 106 #endif /* __thumb__ */ 107 108 #define GOT_INIT(got,gotsym,pclabel) \ 109 ldr got, gotsym; \ 110 add got, got, pc; \ 111 pclabel: 112 #define GOT_INITSYM(gotsym,pclabel) \ 113 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) + (. - (pclabel+4)) 114 115 #ifdef __STDC__ 116 #define PIC_SYM(x,y) x ## ( ## y ## ) 117 #else 118 #define PIC_SYM(x,y) x/**/(/**/y/**/) 119 #endif 120 121 #else 122 #define PLT_SYM(x) x 123 #define GOT_SYM(x) x 124 #define GOT_GET(x,got,sym) \ 125 ldr x, sym; 126 #define GOT_INIT(got,gotsym,pclabel) 127 #define GOT_INITSYM(gotsym,pclabel) 128 #define PIC_SYM(x,y) x 129 #endif /* PIC */ 130 131 #define RCSID(x) .pushsection ".ident"; .asciz x; .popsection 132 133 #define WEAK_ALIAS(alias,sym) \ 134 .weak alias; \ 135 alias = sym 136 137 /* 138 * STRONG_ALIAS: create a strong alias. 139 */ 140 #define STRONG_ALIAS(alias,sym) \ 141 .globl alias; \ 142 alias = sym 143 144 #ifdef __STDC__ 145 #define WARN_REFERENCES(sym,msg) \ 146 .pushsection .gnu.warning. ## sym; \ 147 .ascii msg; \ 148 .popsection 149 #else 150 #define WARN_REFERENCES(sym,msg) \ 151 .pushsection .gnu.warning./**/sym; \ 152 .ascii msg; \ 153 .popsection 154 #endif /* __STDC__ */ 155 156 #ifdef __thumb__ 157 # define XPUSH push 158 # define XPOP pop 159 # define XPOPRET pop {pc} 160 #else 161 # define XPUSH stmfd sp!, 162 # define XPOP ldmfd sp!, 163 # ifdef _ARM_ARCH_5 164 # define XPOPRET ldmfd sp!, {pc} 165 # else 166 # define XPOPRET ldmfd sp!, {lr}; mov pc, lr 167 # endif 168 #endif 169 170 #if defined (_ARM_ARCH_4T) 171 # define RET bx lr 172 # define RETc(c) __CONCAT(bx,c) lr 173 #else 174 # define RET mov pc, lr 175 # define RETc(c) __CONCAT(mov,c) pc, lr 176 #endif 177 178 #endif /* !_ARM_ASM_H_ */ 179
Indexes created Thu Oct 02 14:10:14 GMT 2025