asm.h revision 1.20
1 /* $NetBSD: asm.h,v 1.20 2013/08/13 00:18:15 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 .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 /* 69 * gas/arm uses @ as a single comment character and thus cannot be used here 70 * Instead it recognised the # instead of an @ symbols in .type directives 71 * We define a couple of macros so that assembly code will not be dependent 72 * on one or the other. 73 */ 74 #define _ASM_TYPE_FUNCTION %function 75 #define _ASM_TYPE_OBJECT %object 76 #define _THUMB_ENTRY(x) \ 77 .text; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; \ 78 .thumb_func; .code 16; x: 79 #define _ARM_ENTRY(x) \ 80 .text; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; \ 81 .code 32; x: 82 #ifdef __thumb__ 83 #define _ENTRY(x) _THUMB_ENTRY(x) 84 #else 85 #define _ENTRY(x) _ARM_ENTRY(x) 86 #endif 87 #define _END(x) .size x,.-x 88 89 #ifdef GPROF 90 # define _PROF_PROLOGUE \ 91 mov ip, lr; bl __mcount 92 #else 93 # define _PROF_PROLOGUE 94 #endif 95 96 #define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 97 #define ENTRY_NP(y) _ENTRY(_C_LABEL(y)) 98 #define END(y) _END(_C_LABEL(y)) 99 #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 100 #define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y)) 101 #define ASEND(y) _END(_ASM_LABEL(y)) 102 103 #define ASMSTR .asciz 104 105 #if defined(PIC) 106 #ifdef __thumb__ 107 #define PLT_SYM(x) x 108 #define GOT_SYM(x) PIC_SYM(x, GOTOFF) 109 #define GOT_GET(x,got,sym) \ 110 ldr x, sym; \ 111 add x, got; \ 112 ldr x, [x] 113 #else 114 #define PLT_SYM(x) PIC_SYM(x, PLT) 115 #define GOT_SYM(x) PIC_SYM(x, GOT) 116 #define GOT_GET(x,got,sym) \ 117 ldr x, sym; \ 118 ldr x, [x, got] 119 #endif /* __thumb__ */ 120 121 #define GOT_INIT(got,gotsym,pclabel) \ 122 ldr got, gotsym; \ 123 add got, got, pc; \ 124 pclabel: 125 #define GOT_INITSYM(gotsym,pclabel) \ 126 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) + (. - (pclabel+4)) 127 128 #ifdef __STDC__ 129 #define PIC_SYM(x,y) x ## ( ## y ## ) 130 #else 131 #define PIC_SYM(x,y) x/**/(/**/y/**/) 132 #endif 133 134 #else 135 #define PLT_SYM(x) x 136 #define GOT_SYM(x) x 137 #define GOT_GET(x,got,sym) \ 138 ldr x, sym; 139 #define GOT_INIT(got,gotsym,pclabel) 140 #define GOT_INITSYM(gotsym,pclabel) 141 #define PIC_SYM(x,y) x 142 #endif /* PIC */ 143 144 #define RCSID(x) .pushsection ".ident"; .asciz x; .popsection 145 146 #define WEAK_ALIAS(alias,sym) \ 147 .weak alias; \ 148 alias = sym 149 150 /* 151 * STRONG_ALIAS: create a strong alias. 152 */ 153 #define STRONG_ALIAS(alias,sym) \ 154 .globl alias; \ 155 alias = sym 156 157 #ifdef __STDC__ 158 #define WARN_REFERENCES(sym,msg) \ 159 .pushsection .gnu.warning. ## sym; \ 160 .ascii msg; \ 161 .popsection 162 #else 163 #define WARN_REFERENCES(sym,msg) \ 164 .pushsection .gnu.warning./**/sym; \ 165 .ascii msg; \ 166 .popsection 167 #endif /* __STDC__ */ 168 169 #ifdef __thumb__ 170 # define XPUSH push 171 # define XPOP pop 172 # define XPOPRET pop {pc} 173 #else 174 # define XPUSH stmfd sp!, 175 # define XPOP ldmfd sp!, 176 # ifdef _ARM_ARCH_5 177 # define XPOPRET ldmfd sp!, {pc} 178 # else 179 # define XPOPRET ldmfd sp!, {lr}; mov pc, lr 180 # endif 181 #endif 182 183 #if defined (_ARM_ARCH_4T) 184 # define RET bx lr 185 # define RETr(r) bx r 186 # if defined(__thumb__) 187 # define RETc(c) it c; __CONCAT(bx,c) lr 188 # else 189 # define RETc(c) __CONCAT(bx,c) lr 190 # endif 191 #else 192 # define RET mov pc, lr 193 # define RETr(r) mov pc, r 194 # define RETc(c) __CONCAT(mov,c) pc, lr 195 #endif 196 197 #ifdef _ARM_ARCH_7 198 #define KMODTRAMPOLINE(n) \ 199 _ENTRY(__wrap_ ## n) \ 200 movw ip, #:lower16:n; \ 201 movt ip, #:upper16:n; \ 202 bx ip 203 #elif defined(_ARM_ARCH_4T) 204 #define KMODTRAMPOLINE(n) \ 205 _ENTRY(__wrap_ ## n) \ 206 ldr ip, [pc]; \ 207 bx ip; \ 208 .word n 209 #else 210 #define KMODTRAMPOLINE(n) \ 211 _ENTRY(__wrap_ ## n) \ 212 ldr pc, [pc, #-4]; \ 213 .word n 214 #endif 215 216 #endif /* !_ARM_ASM_H_ */ 217
Indexes created Thu Oct 02 14:10:14 GMT 2025