asm.h revision 1.22.10.1
1 /* $NetBSD: asm.h,v 1.22.10.1 2000/06/22 17:01:26 minoura Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ralph Campbell. 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)machAsmDefs.h 8.1 (Berkeley) 6/10/93 39 */ 40 41 /* 42 * machAsmDefs.h -- 43 * 44 * Macros used when writing assembler programs. 45 * 46 * Copyright (C) 1989 Digital Equipment Corporation. 47 * Permission to use, copy, modify, and distribute this software and 48 * its documentation for any purpose and without fee is hereby granted, 49 * provided that the above copyright notice appears in all copies. 50 * Digital Equipment Corporation makes no representations about the 51 * suitability of this software for any purpose. It is provided "as is" 52 * without express or implied warranty. 53 * 54 * from: Header: /sprite/src/kernel/mach/ds3100.md/RCS/machAsmDefs.h, 55 * v 1.2 89/08/15 18:28:24 rab Exp SPRITE (DECWRL) 56 */ 57 58 #ifndef _MIPS_ASM_H 59 #define _MIPS_ASM_H 60 61 #include <mips/regdef.h> 62 63 /* 64 * Define -pg profile entry code. 65 * Must always be noreorder, must never use a macro instruction 66 * Final addiu to t9 must always equal the size of this _KERN_MCOUNT 67 */ 68 #define _KERN_MCOUNT \ 69 .set push; \ 70 .set noreorder; \ 71 .set noat; \ 72 sw t9,-4(sp); \ 73 move AT,ra; \ 74 lui t9,%hi(_mcount); \ 75 addiu t9,t9,%lo(_mcount); \ 76 jalr t9; \ 77 subu sp,sp,16; \ 78 lw t9,4(sp); \ 79 addiu sp,sp,8; \ 80 addiu t9,t9,36; \ 81 .set pop; 82 83 #ifdef GPROF 84 #define MCOUNT _KERN_MCOUNT 85 #else 86 #define MCOUNT 87 #endif 88 89 #ifdef __NO_LEADING_UNDERSCORES__ 90 # define _C_LABEL(x) x 91 #else 92 # ifdef __STDC__ 93 # define _C_LABEL(x) _ ## x 94 # else 95 # define _C_LABEL(x) _/**/x 96 # endif 97 #endif 98 99 #ifdef USE_AENT 100 #define AENT(x) \ 101 .aent x, 0 102 #else 103 #define AENT(x) 104 #endif 105 106 /* 107 * WARN_REFERENCES: create a warning if the specified symbol is referenced 108 * (ELF only, and thus, no leading underscores). 109 */ 110 #ifdef __ELF__ 111 #ifdef __STDC__ 112 #define WARN_REFERENCES(_sym,_msg) \ 113 .section .gnu.warning. ## _sym ; .ascii _msg ; .text 114 #else 115 #define WARN_REFERENCES(_sym,_msg) \ 116 .section .gnu.warning./**/_sym ; .ascii _msg ; .text 117 #endif /* __STDC__ */ 118 #endif /* __ELF__ */ 119 120 /* 121 * LEAF 122 * A leaf routine does 123 * - call no other function, 124 * - never use any register that callee-saved (S0-S8), and 125 * - not use any local stack storage. 126 */ 127 #define LEAF(x) \ 128 .globl _C_LABEL(x); \ 129 .ent _C_LABEL(x), 0; \ 130 _C_LABEL(x): ; \ 131 .frame sp, 0, ra; \ 132 MCOUNT 133 134 /* 135 * LEAF_NOPROFILE 136 * No profilable leaf routine. 137 */ 138 #define LEAF_NOPROFILE(x) \ 139 .globl _C_LABEL(x); \ 140 .ent _C_LABEL(x), 0; \ 141 _C_LABEL(x): ; \ 142 .frame sp, 0, ra 143 144 /* 145 * XLEAF 146 * declare alternate entry to leaf routine 147 */ 148 #define XLEAF(x) \ 149 .globl _C_LABEL(x); \ 150 AENT (_C_LABEL(x)); \ 151 _C_LABEL(x): 152 153 /* 154 * NESTED 155 * A function calls other functions and needs 156 * therefore stack space to save/restore registers. 157 */ 158 #define NESTED(x, fsize, retpc) \ 159 .globl _C_LABEL(x); \ 160 .ent _C_LABEL(x), 0; \ 161 _C_LABEL(x): ; \ 162 .frame sp, fsize, retpc; \ 163 MCOUNT 164 165 /* 166 * NESTED_NOPROFILE(x) 167 * No profilable nested routine. 168 */ 169 #define NESTED_NOPROFILE(x, fsize, retpc) \ 170 .globl _C_LABEL(x); \ 171 .ent _C_LABEL(x), 0; \ 172 _C_LABEL(x): ; \ 173 .frame sp, fsize, retpc 174 175 /* 176 * XNESTED 177 * declare alternate entry point to nested routine. 178 */ 179 #define XNESTED(x) \ 180 .globl _C_LABEL(x); \ 181 AENT (_C_LABEL(x)); \ 182 _C_LABEL(x): 183 184 /* 185 * END 186 * Mark end of a procedure. 187 */ 188 #define END(x) \ 189 .end _C_LABEL(x) 190 191 /* 192 * IMPORT -- import external symbol 193 */ 194 #define IMPORT(sym, size) \ 195 .extern _C_LABEL(sym),size 196 197 /* 198 * EXPORT -- export definition of symbol 199 */ 200 #define EXPORT(x) \ 201 .globl _C_LABEL(x); \ 202 _C_LABEL(x): 203 204 /* 205 * VECTOR 206 * exception vector entrypoint 207 * XXX: regmask should be used to generate .mask 208 */ 209 #define VECTOR(x, regmask) \ 210 .ent _C_LABEL(x),0; \ 211 EXPORT(x); \ 212 213 #ifdef __STDC__ 214 #define VECTOR_END(x) \ 215 EXPORT(x ## End); \ 216 END(x) 217 #else 218 #define VECTOR_END(x) \ 219 EXPORT(x/**/End); \ 220 END(x) 221 #endif 222 223 /* 224 * Macros to panic and printf from assembly language. 225 */ 226 #define PANIC(msg) \ 227 la a0, 9f; \ 228 jal _C_LABEL(panic); \ 229 MSG(msg) 230 231 #define PRINTF(msg) \ 232 la a0, 9f; \ 233 jal _C_LABEL(printf); \ 234 MSG(msg) 235 236 #define MSG(msg) \ 237 .rdata; \ 238 9: .asciiz msg; \ 239 .text 240 241 #define ASMSTR(str) \ 242 .asciiz str; \ 243 .align 3 244 245 /* 246 * XXX retain dialects XXX 247 */ 248 #define ALEAF(x) XLEAF(x) 249 #define NLEAF(x) LEAF_NOPROFILE(x) 250 #define NON_LEAF(x, fsize, retpc) NESTED(x, fsize, retpc) 251 #define NNON_LEAF(x, fsize, retpc) NESTED_NOPROFILE(x, fsize, retpc) 252 253 /* 254 * standard callframe { 255 * register_t cf_args[4]; arg0 - arg3 256 * register_t cf_sp; frame pointer 257 * register_t cf_ra; return address 258 * }; 259 */ 260 #define CALLFRAME_SIZ (4 * (4 + 2)) 261 #define CALLFRAME_SP (4 * 4) 262 #define CALLFRAME_RA (4 * 5) 263 264 /* 265 * While it would be nice to be compatible with the SGI 266 * REG_L and REG_S macros, because they do not take parameters, it 267 * is impossible to use them with the _MIPS_SIM_ABIX32 model. 268 * 269 * These macros hide the use of mips3 instructions from the 270 * assembler to prevent the assembler from generating 64-bit style 271 * ABI calls. 272 */ 273 274 #if !defined(_MIPS_BSD_API) || _MIPS_BSD_API == _MIPS_BSD_API_LP32 275 #define REG_L lw 276 #define REG_S sw 277 #define REG_LI li 278 #define REG_PROLOGUE .set push 279 #define REG_EPILOGUE .set pop 280 #define SZREG 4 281 #else 282 #define REG_L ld 283 #define REG_S sd 284 #define REG_LI dli 285 #define REG_PROLOGUE .set push ; .set mips3 286 #define REG_EPILOGUE .set pop 287 #define SZREG 8 288 #endif /* _MIPS_BSD_API */ 289 290 #endif /* _MIPS_ASM_H */ 291
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