asm.h revision 1.19
1 /* $NetBSD: asm.h,v 1.19 2013/08/11 04:39:18 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 #define __BIT(n) (1 << (n)) 45 #define __BITS(hi,lo) ((~((~0)<<((hi)+1)))&((~0)<<(lo))) 46 47 #define _C_LABEL(x) x 48 #define _ASM_LABEL(x) x 49 50 #ifdef __STDC__ 51 # define __CONCAT(x,y) x ## y 52 # define __STRING(x) #x 53 #else 54 # define __CONCAT(x,y) x/**/y 55 # define __STRING(x) "x" 56 #endif 57 58 #ifndef _ALIGN_TEXT 59 # define _ALIGN_TEXT .align 2 60 #endif 61 62 /* 63 * gas/arm uses @ as a single comment character and thus cannot be used here 64 * Instead it recognised the # instead of an @ symbols in .type directives 65 * We define a couple of macros so that assembly code will not be dependent 66 * on one or the other. 67 */ 68 #define _ASM_TYPE_FUNCTION %function 69 #define _ASM_TYPE_OBJECT %object 70 #ifdef __thumb__ 71 #define _ENTRY(x) \ 72 .text; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; .thumb_func; x: 73 #else 74 #define _ENTRY(x) \ 75 .text; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; x: 76 #endif 77 #define _END(x) .size x,.-x 78 79 #ifdef GPROF 80 # define _PROF_PROLOGUE \ 81 mov ip, lr; bl __mcount 82 #else 83 # define _PROF_PROLOGUE 84 #endif 85 86 #define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 87 #define ENTRY_NP(y) _ENTRY(_C_LABEL(y)) 88 #define END(y) _END(_C_LABEL(y)) 89 #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 90 #define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y)) 91 #define ASEND(y) _END(_ASM_LABEL(y)) 92 93 #define ASMSTR .asciz 94 95 #if defined(PIC) 96 #ifdef __thumb__ 97 #define PLT_SYM(x) x 98 #define GOT_SYM(x) PIC_SYM(x, GOTOFF) 99 #define GOT_GET(x,got,sym) \ 100 ldr x, sym; \ 101 add x, got; \ 102 ldr x, [x] 103 #else 104 #define PLT_SYM(x) PIC_SYM(x, PLT) 105 #define GOT_SYM(x) PIC_SYM(x, GOT) 106 #define GOT_GET(x,got,sym) \ 107 ldr x, sym; \ 108 ldr x, [x, got] 109 #endif /* __thumb__ */ 110 111 #define GOT_INIT(got,gotsym,pclabel) \ 112 ldr got, gotsym; \ 113 add got, got, pc; \ 114 pclabel: 115 #define GOT_INITSYM(gotsym,pclabel) \ 116 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) + (. - (pclabel+4)) 117 118 #ifdef __STDC__ 119 #define PIC_SYM(x,y) x ## ( ## y ## ) 120 #else 121 #define PIC_SYM(x,y) x/**/(/**/y/**/) 122 #endif 123 124 #else 125 #define PLT_SYM(x) x 126 #define GOT_SYM(x) x 127 #define GOT_GET(x,got,sym) \ 128 ldr x, sym; 129 #define GOT_INIT(got,gotsym,pclabel) 130 #define GOT_INITSYM(gotsym,pclabel) 131 #define PIC_SYM(x,y) x 132 #endif /* PIC */ 133 134 #define RCSID(x) .pushsection ".ident"; .asciz x; .popsection 135 136 #define WEAK_ALIAS(alias,sym) \ 137 .weak alias; \ 138 alias = sym 139 140 /* 141 * STRONG_ALIAS: create a strong alias. 142 */ 143 #define STRONG_ALIAS(alias,sym) \ 144 .globl alias; \ 145 alias = sym 146 147 #ifdef __STDC__ 148 #define WARN_REFERENCES(sym,msg) \ 149 .pushsection .gnu.warning. ## sym; \ 150 .ascii msg; \ 151 .popsection 152 #else 153 #define WARN_REFERENCES(sym,msg) \ 154 .pushsection .gnu.warning./**/sym; \ 155 .ascii msg; \ 156 .popsection 157 #endif /* __STDC__ */ 158 159 #ifdef __thumb__ 160 # define XPUSH push 161 # define XPOP pop 162 # define XPOPRET pop {pc} 163 #else 164 # define XPUSH stmfd sp!, 165 # define XPOP ldmfd sp!, 166 # ifdef _ARM_ARCH_5 167 # define XPOPRET ldmfd sp!, {pc} 168 # else 169 # define XPOPRET ldmfd sp!, {lr}; mov pc, lr 170 # endif 171 #endif 172 173 #if defined (_ARM_ARCH_4T) 174 # define RET bx lr 175 # define RETr(r) bx r 176 # if defined(__thumb__) 177 # define RETc(c) it c; __CONCAT(bx,c) lr 178 # else 179 # define RETc(c) __CONCAT(bx,c) lr 180 # endif 181 #else 182 # define RET mov pc, lr 183 # define RETr(r) mov pc, r 184 # define RETc(c) __CONCAT(mov,c) pc, lr 185 #endif 186 187 #ifdef _ARM_ARCH_7 188 #define KMODTRAMPOLINE(n) \ 189 _ENTRY(__wrap_ ## n) \ 190 movw ip, #:lower16:n; \ 191 movt ip, #:upper16:n; \ 192 bx ip 193 #elif defined(_ARM_ARCH_4T) 194 #define KMODTRAMPOLINE(n) \ 195 _ENTRY(__wrap_ ## n) \ 196 ldr ip, [pc]; \ 197 bx ip; \ 198 .word n 199 #else 200 #define KMODTRAMPOLINE(n) \ 201 _ENTRY(__wrap_ ## n) \ 202 ldr pc, [pc, #-4]; \ 203 .word n 204 #endif 205 206 #endif /* !_ARM_ASM_H_ */ 207
Indexes created Thu Oct 02 14:10:14 GMT 2025