asm.h revision 1.29
1 /* $NetBSD: asm.h,v 1.29 2019/01/27 02:08:37 pgoyette 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) 2014 The NetBSD Foundation, Inc. 34 * All rights reserved. 35 * 36 * This code is derived from software contributed to The NetBSD Foundation 37 * by Matt Thomas of 3am Software Foundry. 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 * 48 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 49 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 50 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 51 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 52 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 53 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 54 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 55 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 56 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 57 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 58 * POSSIBILITY OF SUCH DAMAGE. 59 */ 60 61 /* 62 * Copyright (c) 1990 The Regents of the University of California. 63 * All rights reserved. 64 * 65 * This code is derived from software contributed to Berkeley by 66 * William Jolitz. 67 * 68 * Redistribution and use in source and binary forms, with or without 69 * modification, are permitted provided that the following conditions 70 * are met: 71 * 1. Redistributions of source code must retain the above copyright 72 * notice, this list of conditions and the following disclaimer. 73 * 2. Redistributions in binary form must reproduce the above copyright 74 * notice, this list of conditions and the following disclaimer in the 75 * documentation and/or other materials provided with the distribution. 76 * 3. Neither the name of the University nor the names of its contributors 77 * may be used to endorse or promote products derived from this software 78 * without specific prior written permission. 79 * 80 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 81 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 82 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 83 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 84 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 85 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 86 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 87 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 88 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 89 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 90 * SUCH DAMAGE. 91 * 92 * from: @(#)asm.h 5.5 (Berkeley) 5/7/91 93 */ 94 95 #ifndef _ARM_ASM_H_ 96 #define _ARM_ASM_H_ 97 98 #include <arm/cdefs.h> 99 100 #ifdef __thumb__ 101 #define THUMB_INSN(n) n 102 #else 103 #define THUMB_INSN(n) 104 #endif 105 106 #define __BIT(n) (1 << (n)) 107 #define __BITS(hi,lo) ((~((~0)<<((hi)+1)))&((~0)<<(lo))) 108 109 #define __LOWEST_SET_BIT(__mask) ((((__mask) - 1) & (__mask)) ^ (__mask)) 110 #define __SHIFTOUT(__x, __mask) (((__x) & (__mask)) / __LOWEST_SET_BIT(__mask)) 111 #define __SHIFTIN(__x, __mask) ((__x) * __LOWEST_SET_BIT(__mask)) 112 113 #define _C_LABEL(x) x 114 #define _ASM_LABEL(x) x 115 116 #ifdef __STDC__ 117 # define __CONCAT(x,y) x ## y 118 # define __STRING(x) #x 119 #else 120 # define __CONCAT(x,y) x/**/y 121 # define __STRING(x) "x" 122 #endif 123 124 #ifndef _ALIGN_TEXT 125 # define _ALIGN_TEXT .align 2 126 #endif 127 128 #ifndef _TEXT_SECTION 129 #define _TEXT_SECTION .text 130 #endif 131 132 #ifdef __arm__ 133 134 .syntax unified 135 136 /* 137 * gas/arm uses @ as a single comment character and thus cannot be used here 138 * Instead it recognised the # instead of an @ symbols in .type directives 139 * We define a couple of macros so that assembly code will not be dependent 140 * on one or the other. 141 */ 142 #define _ASM_TYPE_FUNCTION %function 143 #define _ASM_TYPE_OBJECT %object 144 #define _THUMB_ENTRY(x) \ 145 _TEXT_SECTION; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; \ 146 .thumb_func; .code 16; x: 147 #define _ARM_ENTRY(x) \ 148 _TEXT_SECTION; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; \ 149 .code 32; x: 150 #ifdef __thumb__ 151 #define _ENTRY(x) _THUMB_ENTRY(x) 152 #else 153 #define _ENTRY(x) _ARM_ENTRY(x) 154 #endif 155 #define _END(x) .size x,.-x 156 157 #ifdef GPROF 158 # define _PROF_PROLOGUE \ 159 mov ip, lr; bl __mcount 160 #else 161 # define _PROF_PROLOGUE 162 #endif 163 #endif 164 165 #ifdef __aarch64__ 166 #define _ASM_TYPE_FUNCTION @function 167 #define _ASM_TYPE_OBJECT @object 168 #define _ENTRY(x) \ 169 _TEXT_SECTION; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; x: 170 #define _END(x) .size x,.-x 171 172 #ifdef GPROF 173 # define _PROF_PROLOGUE \ 174 mov x9, x30; bl __mcount 175 #else 176 # define _PROF_PROLOGUE 177 #endif 178 179 #ifdef __PIC__ 180 #define GOTREF(x) :got:x 181 #define GOTLO12(x) :got_lo12:x 182 #else 183 #define GOTREF(x) x 184 #define GOTLO12(x) :lo12:x 185 #endif 186 #endif 187 188 #define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 189 #define ENTRY_NP(y) _ENTRY(_C_LABEL(y)) 190 #define END(y) _END(_C_LABEL(y)) 191 #define ARM_ENTRY(y) _ARM_ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 192 #define ARM_ENTRY_NP(y) _ARM_ENTRY(_C_LABEL(y)) 193 #define THUMB_ENTRY(y) _THUMB_ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 194 #define THUMB_ENTRY_NP(y) _THUMB_ENTRY(_C_LABEL(y)) 195 #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 196 #define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y)) 197 #define ASEND(y) _END(_ASM_LABEL(y)) 198 #define ARM_ASENTRY(y) _ARM_ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 199 #define ARM_ASENTRY_NP(y) _ARM_ENTRY(_ASM_LABEL(y)) 200 #define THUMB_ASENTRY(y) _THUMB_ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 201 #define THUMB_ASENTRY_NP(y) _THUMB_ENTRY(_ASM_LABEL(y)) 202 203 #define ASMSTR .asciz 204 205 #ifdef __PIC__ 206 #define REL_SYM(a, b) ((a) - (b)) 207 #define PLT_SYM(x) x 208 #define GOT_SYM(x) PIC_SYM(x, GOT) 209 #define GOT_GET(x,got,sym) \ 210 ldr x, sym; \ 211 ldr x, [x, got] 212 #define GOT_INIT(got,gotsym,pclabel) \ 213 ldr got, gotsym; \ 214 pclabel: add got, got, pc 215 #ifdef __thumb__ 216 #define GOT_INITSYM(gotsym,pclabel) \ 217 .align 0; \ 218 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+4) 219 #else 220 #define GOT_INITSYM(gotsym,pclabel) \ 221 .align 0; \ 222 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+8) 223 #endif 224 225 #ifdef __STDC__ 226 #define PIC_SYM(x,y) x ## ( ## y ## ) 227 #else 228 #define PIC_SYM(x,y) x/**/(/**/y/**/) 229 #endif 230 231 #else 232 #define REL_SYM(a, b) (a) 233 #define PLT_SYM(x) x 234 #define GOT_SYM(x) x 235 #define GOT_GET(x,got,sym) \ 236 ldr x, sym; 237 #define GOT_INIT(got,gotsym,pclabel) 238 #define GOT_INITSYM(gotsym,pclabel) 239 #define PIC_SYM(x,y) x 240 #endif /* __PIC__ */ 241 242 #define RCSID(x) .pushsection ".ident"; .asciz x; .popsection 243 244 #define WEAK_ALIAS(alias,sym) \ 245 .weak alias; \ 246 alias = sym 247 248 /* 249 * STRONG_ALIAS: create a strong alias. 250 */ 251 #define STRONG_ALIAS(alias,sym) \ 252 .globl alias; \ 253 alias = sym 254 255 #ifdef __STDC__ 256 #define WARN_REFERENCES(sym,msg) \ 257 .pushsection .gnu.warning. ## sym; \ 258 .ascii msg; \ 259 .popsection 260 #else 261 #define WARN_REFERENCES(sym,msg) \ 262 .pushsection .gnu.warning./**/sym; \ 263 .ascii msg; \ 264 .popsection 265 #endif /* __STDC__ */ 266 267 #ifdef __thumb__ 268 # define XPUSH push 269 # define XPOP pop 270 # define XPOPRET pop {pc} 271 #else 272 # define XPUSH stmfd sp!, 273 # define XPOP ldmfd sp!, 274 # ifdef _ARM_ARCH_5 275 # define XPOPRET ldmfd sp!, {pc} 276 # else 277 # define XPOPRET ldmfd sp!, {lr}; mov pc, lr 278 # endif 279 #endif 280 281 #if defined(__aarch64__) 282 # define RET ret 283 #elif defined (_ARM_ARCH_4T) 284 # define RET bx lr 285 # define RETr(r) bx r 286 # if defined(__thumb__) 287 # if defined(_ARM_ARCH_7) 288 # define RETc(c) it c; __CONCAT(bx,c) lr 289 # endif 290 # else 291 # define RETc(c) __CONCAT(bx,c) lr 292 # endif 293 #else 294 # define RET mov pc, lr 295 # define RETr(r) mov pc, r 296 # define RETc(c) __CONCAT(mov,c) pc, lr 297 #endif 298 299 #ifdef _ARM_ARCH_7 300 #define KMODTRAMPOLINE(n) \ 301 _ENTRY(__wrap_ ## n) \ 302 movw ip, #:lower16:n; \ 303 movt ip, #:upper16:n; \ 304 bx ip 305 #elif defined(_ARM_ARCH_4T) 306 #define KMODTRAMPOLINE(n) \ 307 _ENTRY(__wrap_ ## n) \ 308 ldr ip, [pc]; \ 309 bx ip; \ 310 .word n 311 #else 312 #define KMODTRAMPOLINE(n) \ 313 _ENTRY(__wrap_ ## n) \ 314 ldr pc, [pc, #-4]; \ 315 .word n 316 #endif 317 318 #endif /* !_ARM_ASM_H_ */ 319
Indexes created Thu Oct 02 14:10:14 GMT 2025