asm.h revision 1.28.2.1
1 /* $NetBSD: asm.h,v 1.28.2.1 2019/06/10 22:05:54 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1990 The Regents of the University of California. 34 * All rights reserved. 35 * 36 * This code is derived from software contributed to Berkeley by 37 * William Jolitz. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 3. Neither the name of the University nor the names of its contributors 48 * may be used to endorse or promote products derived from this software 49 * without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 54 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 61 * SUCH DAMAGE. 62 * 63 * from: @(#)asm.h 5.5 (Berkeley) 5/7/91 64 */ 65 66 #ifndef _ARM_ASM_H_ 67 #define _ARM_ASM_H_ 68 69 #include <arm/cdefs.h> 70 71 #ifdef __thumb__ 72 #define THUMB_INSN(n) n 73 #else 74 #define THUMB_INSN(n) 75 #endif 76 77 #define __BIT(n) (1 << (n)) 78 #define __BITS(hi,lo) ((~((~0)<<((hi)+1)))&((~0)<<(lo))) 79 80 #define __LOWEST_SET_BIT(__mask) ((((__mask) - 1) & (__mask)) ^ (__mask)) 81 #define __SHIFTOUT(__x, __mask) (((__x) & (__mask)) / __LOWEST_SET_BIT(__mask)) 82 #define __SHIFTIN(__x, __mask) ((__x) * __LOWEST_SET_BIT(__mask)) 83 84 #define _C_LABEL(x) x 85 #define _ASM_LABEL(x) x 86 87 #ifdef __STDC__ 88 # define __CONCAT(x,y) x ## y 89 # define __STRING(x) #x 90 #else 91 # define __CONCAT(x,y) x/**/y 92 # define __STRING(x) "x" 93 #endif 94 95 #ifndef _ALIGN_TEXT 96 # define _ALIGN_TEXT .align 2 97 #endif 98 99 #ifndef _TEXT_SECTION 100 #define _TEXT_SECTION .text 101 #endif 102 103 #ifdef __arm__ 104 105 .syntax unified 106 107 /* 108 * gas/arm uses @ as a single comment character and thus cannot be used here 109 * Instead it recognised the # instead of an @ symbols in .type directives 110 * We define a couple of macros so that assembly code will not be dependent 111 * on one or the other. 112 */ 113 #define _ASM_TYPE_FUNCTION %function 114 #define _ASM_TYPE_OBJECT %object 115 #define _THUMB_ENTRY(x) \ 116 _TEXT_SECTION; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; \ 117 .thumb_func; .code 16; x: 118 #define _ARM_ENTRY(x) \ 119 _TEXT_SECTION; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; \ 120 .code 32; x: 121 #ifdef __thumb__ 122 #define _ENTRY(x) _THUMB_ENTRY(x) 123 #else 124 #define _ENTRY(x) _ARM_ENTRY(x) 125 #endif 126 #define _END(x) .size x,.-x 127 128 #ifdef GPROF 129 # define _PROF_PROLOGUE \ 130 mov ip, lr; bl __mcount 131 #else 132 # define _PROF_PROLOGUE 133 #endif 134 #endif 135 136 #ifdef __aarch64__ 137 #define _ASM_TYPE_FUNCTION @function 138 #define _ASM_TYPE_OBJECT @object 139 #define _ENTRY(x) \ 140 _TEXT_SECTION; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; x: 141 #define _END(x) .size x,.-x 142 143 #ifdef GPROF 144 # define _PROF_PROLOGUE \ 145 mov x9, x30; bl __mcount 146 #else 147 # define _PROF_PROLOGUE 148 #endif 149 150 #ifdef __PIC__ 151 #define GOTREF(x) :got:x 152 #define GOTLO12(x) :got_lo12:x 153 #else 154 #define GOTREF(x) x 155 #define GOTLO12(x) :lo12:x 156 #endif 157 #endif 158 159 #define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 160 #define ENTRY_NP(y) _ENTRY(_C_LABEL(y)) 161 #define END(y) _END(_C_LABEL(y)) 162 #define ARM_ENTRY(y) _ARM_ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 163 #define ARM_ENTRY_NP(y) _ARM_ENTRY(_C_LABEL(y)) 164 #define THUMB_ENTRY(y) _THUMB_ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 165 #define THUMB_ENTRY_NP(y) _THUMB_ENTRY(_C_LABEL(y)) 166 #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 167 #define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y)) 168 #define ASEND(y) _END(_ASM_LABEL(y)) 169 #define ARM_ASENTRY(y) _ARM_ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 170 #define ARM_ASENTRY_NP(y) _ARM_ENTRY(_ASM_LABEL(y)) 171 #define THUMB_ASENTRY(y) _THUMB_ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 172 #define THUMB_ASENTRY_NP(y) _THUMB_ENTRY(_ASM_LABEL(y)) 173 174 #define ASMSTR .asciz 175 176 #ifdef __PIC__ 177 #define REL_SYM(a, b) ((a) - (b)) 178 #define PLT_SYM(x) x 179 #define GOT_SYM(x) PIC_SYM(x, GOT) 180 #define GOT_GET(x,got,sym) \ 181 ldr x, sym; \ 182 ldr x, [x, got] 183 #define GOT_INIT(got,gotsym,pclabel) \ 184 ldr got, gotsym; \ 185 pclabel: add got, got, pc 186 #ifdef __thumb__ 187 #define GOT_INITSYM(gotsym,pclabel) \ 188 .align 0; \ 189 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+4) 190 #else 191 #define GOT_INITSYM(gotsym,pclabel) \ 192 .align 0; \ 193 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+8) 194 #endif 195 196 #ifdef __STDC__ 197 #define PIC_SYM(x,y) x ## ( ## y ## ) 198 #else 199 #define PIC_SYM(x,y) x/**/(/**/y/**/) 200 #endif 201 202 #else 203 #define REL_SYM(a, b) (a) 204 #define PLT_SYM(x) x 205 #define GOT_SYM(x) x 206 #define GOT_GET(x,got,sym) \ 207 ldr x, sym; 208 #define GOT_INIT(got,gotsym,pclabel) 209 #define GOT_INITSYM(gotsym,pclabel) 210 #define PIC_SYM(x,y) x 211 #endif /* __PIC__ */ 212 213 #define RCSID(x) .pushsection ".ident"; .asciz x; .popsection 214 215 #define WEAK_ALIAS(alias,sym) \ 216 .weak alias; \ 217 alias = sym 218 219 /* 220 * STRONG_ALIAS: create a strong alias. 221 */ 222 #define STRONG_ALIAS(alias,sym) \ 223 .globl alias; \ 224 alias = sym 225 226 #ifdef __STDC__ 227 #define WARN_REFERENCES(sym,msg) \ 228 .pushsection .gnu.warning. ## sym; \ 229 .ascii msg; \ 230 .popsection 231 #else 232 #define WARN_REFERENCES(sym,msg) \ 233 .pushsection .gnu.warning./**/sym; \ 234 .ascii msg; \ 235 .popsection 236 #endif /* __STDC__ */ 237 238 #ifdef __thumb__ 239 # define XPUSH push 240 # define XPOP pop 241 # define XPOPRET pop {pc} 242 #else 243 # define XPUSH stmfd sp!, 244 # define XPOP ldmfd sp!, 245 # ifdef _ARM_ARCH_5 246 # define XPOPRET ldmfd sp!, {pc} 247 # else 248 # define XPOPRET ldmfd sp!, {lr}; mov pc, lr 249 # endif 250 #endif 251 252 #if defined(__aarch64__) 253 # define RET ret 254 #elif defined (_ARM_ARCH_4T) 255 # define RET bx lr 256 # define RETr(r) bx r 257 # if defined(__thumb__) 258 # if defined(_ARM_ARCH_7) 259 # define RETc(c) it c; __CONCAT(bx,c) lr 260 # endif 261 # else 262 # define RETc(c) __CONCAT(bx,c) lr 263 # endif 264 #else 265 # define RET mov pc, lr 266 # define RETr(r) mov pc, r 267 # define RETc(c) __CONCAT(mov,c) pc, lr 268 #endif 269 270 #ifdef _ARM_ARCH_7 271 #define KMODTRAMPOLINE(n) \ 272 _ENTRY(__wrap_ ## n) \ 273 movw ip, #:lower16:n; \ 274 movt ip, #:upper16:n; \ 275 bx ip 276 #elif defined(_ARM_ARCH_4T) 277 #define KMODTRAMPOLINE(n) \ 278 _ENTRY(__wrap_ ## n) \ 279 ldr ip, [pc]; \ 280 bx ip; \ 281 .word n 282 #else 283 #define KMODTRAMPOLINE(n) \ 284 _ENTRY(__wrap_ ## n) \ 285 ldr pc, [pc, #-4]; \ 286 .word n 287 #endif 288 289 #endif /* !_ARM_ASM_H_ */ 290
Indexes created Thu Oct 02 14:10:14 GMT 2025