asm.h revision 1.23
1 /* $NetBSD: asm.h,v 1.23 2013/08/19 22:08:31 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 .syntax unified 43 44 #ifdef __thumb__ 45 #define THUMB_INSN(n) n 46 #else 47 #define THUMB_INSN(n) 48 #endif 49 50 #define __BIT(n) (1 << (n)) 51 #define __BITS(hi,lo) ((~((~0)<<((hi)+1)))&((~0)<<(lo))) 52 53 #define _C_LABEL(x) x 54 #define _ASM_LABEL(x) x 55 56 #ifdef __STDC__ 57 # define __CONCAT(x,y) x ## y 58 # define __STRING(x) #x 59 #else 60 # define __CONCAT(x,y) x/**/y 61 # define __STRING(x) "x" 62 #endif 63 64 #ifndef _ALIGN_TEXT 65 # define _ALIGN_TEXT .align 2 66 #endif 67 68 #ifndef _TEXT_SECTION 69 #define _TEXT_SECTION .text 70 #endif 71 /* 72 * gas/arm uses @ as a single comment character and thus cannot be used here 73 * Instead it recognised the # instead of an @ symbols in .type directives 74 * We define a couple of macros so that assembly code will not be dependent 75 * on one or the other. 76 */ 77 #define _ASM_TYPE_FUNCTION %function 78 #define _ASM_TYPE_OBJECT %object 79 #define _THUMB_ENTRY(x) \ 80 _TEXT_SECTION; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; \ 81 .thumb_func; .code 16; x: 82 #define _ARM_ENTRY(x) \ 83 _TEXT_SECTION; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; \ 84 .code 32; x: 85 #ifdef __thumb__ 86 #define _ENTRY(x) _THUMB_ENTRY(x) 87 #else 88 #define _ENTRY(x) _ARM_ENTRY(x) 89 #endif 90 #define _END(x) .size x,.-x 91 92 #ifdef GPROF 93 # define _PROF_PROLOGUE \ 94 mov ip, lr; bl __mcount 95 #else 96 # define _PROF_PROLOGUE 97 #endif 98 99 #define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 100 #define ENTRY_NP(y) _ENTRY(_C_LABEL(y)) 101 #define END(y) _END(_C_LABEL(y)) 102 #define ARM_ENTRY(y) _ARM_ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 103 #define ARM_ENTRY_NP(y) _ARM_ENTRY(_C_LABEL(y)) 104 #define THUMB_ENTRY(y) _THUMB_ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 105 #define THUMB_ENTRY_NP(y) _THUMB_ENTRY(_C_LABEL(y)) 106 #define END(y) _END(_C_LABEL(y)) 107 #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 108 #define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y)) 109 #define ASEND(y) _END(_ASM_LABEL(y)) 110 #define ARM_ASENTRY(y) _ARM_ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 111 #define ARM_ASENTRY_NP(y) _ARM_ENTRY(_ASM_LABEL(y)) 112 #define THUMB_ASENTRY(y) _THUMB_ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 113 #define THUMB_ASENTRY_NP(y) _THUMB_ENTRY(_ASM_LABEL(y)) 114 115 #define ASMSTR .asciz 116 117 #if defined(PIC) || defined(__pic__) 118 #define REL_SYM(a, b) ((a) - (b)) 119 #define PLT_SYM(x) PIC_SYM(x, PLT) 120 #define GOT_SYM(x) PIC_SYM(x, GOT) 121 #define GOT_GET(x,got,sym) \ 122 ldr x, sym; \ 123 ldr x, [x, got] 124 #define GOT_INIT(got,gotsym,pclabel) \ 125 ldr got, gotsym; \ 126 pclabel: add got, got, pc 127 #ifdef __thumb__ 128 #define GOT_INITSYM(gotsym,pclabel) \ 129 .align 0; \ 130 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+4) 131 #else 132 #define GOT_INITSYM(gotsym,pclabel) \ 133 .align 0; \ 134 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+8) 135 #endif 136 137 #ifdef __STDC__ 138 #define PIC_SYM(x,y) x ## ( ## y ## ) 139 #else 140 #define PIC_SYM(x,y) x/**/(/**/y/**/) 141 #endif 142 143 #else 144 #define REL_SYM(a, b) (a) 145 #define PLT_SYM(x) x 146 #define GOT_SYM(x) x 147 #define GOT_GET(x,got,sym) \ 148 ldr x, sym; 149 #define GOT_INIT(got,gotsym,pclabel) 150 #define GOT_INITSYM(gotsym,pclabel) 151 #define PIC_SYM(x,y) x 152 #endif /* PIC */ 153 154 #define RCSID(x) .pushsection ".ident"; .asciz x; .popsection 155 156 #define WEAK_ALIAS(alias,sym) \ 157 .weak alias; \ 158 alias = sym 159 160 /* 161 * STRONG_ALIAS: create a strong alias. 162 */ 163 #define STRONG_ALIAS(alias,sym) \ 164 .globl alias; \ 165 alias = sym 166 167 #ifdef __STDC__ 168 #define WARN_REFERENCES(sym,msg) \ 169 .pushsection .gnu.warning. ## sym; \ 170 .ascii msg; \ 171 .popsection 172 #else 173 #define WARN_REFERENCES(sym,msg) \ 174 .pushsection .gnu.warning./**/sym; \ 175 .ascii msg; \ 176 .popsection 177 #endif /* __STDC__ */ 178 179 #ifdef __thumb__ 180 # define XPUSH push 181 # define XPOP pop 182 # define XPOPRET pop {pc} 183 #else 184 # define XPUSH stmfd sp!, 185 # define XPOP ldmfd sp!, 186 # ifdef _ARM_ARCH_5 187 # define XPOPRET ldmfd sp!, {pc} 188 # else 189 # define XPOPRET ldmfd sp!, {lr}; mov pc, lr 190 # endif 191 #endif 192 193 #if defined (_ARM_ARCH_4T) 194 # define RET bx lr 195 # define RETr(r) bx r 196 # if defined(__thumb__) 197 # if defined(_ARM_ARCH_7) 198 # define RETc(c) it c; __CONCAT(bx,c) lr 199 # endif 200 # else 201 # define RETc(c) __CONCAT(bx,c) lr 202 # endif 203 #else 204 # define RET mov pc, lr 205 # define RETr(r) mov pc, r 206 # define RETc(c) __CONCAT(mov,c) pc, lr 207 #endif 208 209 #ifdef _ARM_ARCH_7 210 #define KMODTRAMPOLINE(n) \ 211 _ENTRY(__wrap_ ## n) \ 212 movw ip, #:lower16:n; \ 213 movt ip, #:upper16:n; \ 214 bx ip 215 #elif defined(_ARM_ARCH_4T) 216 #define KMODTRAMPOLINE(n) \ 217 _ENTRY(__wrap_ ## n) \ 218 ldr ip, [pc]; \ 219 bx ip; \ 220 .word n 221 #else 222 #define KMODTRAMPOLINE(n) \ 223 _ENTRY(__wrap_ ## n) \ 224 ldr pc, [pc, #-4]; \ 225 .word n 226 #endif 227 228 #endif /* !_ARM_ASM_H_ */ 229
Indexes created Thu Oct 02 14:10:14 GMT 2025