1 /* $NetBSD: asm.h,v 1.5 2003/08/07 16:26:53 agc 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 * $FreeBSD$ 37 */ 38 39 #ifndef _MACHINE_ASM_H_ 40 #define _MACHINE_ASM_H_ 41 #include <sys/cdefs.h> 42 43 #define _C_LABEL(x) x 44 #define _ASM_LABEL(x) x 45 46 #ifndef _ALIGN_TEXT 47 # define _ALIGN_TEXT .align 0 48 #endif 49 50 #if defined(__ARM_EABI__) && !defined(_STANDALONE) 51 #define STOP_UNWINDING .cantunwind 52 #define _FNSTART .fnstart 53 #define _FNEND .fnend 54 #else 55 #define STOP_UNWINDING 56 #define _FNSTART 57 #define _FNEND 58 #endif 59 60 /* 61 * gas/arm uses @ as a single comment character and thus cannot be used here. 62 * It recognises the # instead of an @ symbol in .type directives. 63 */ 64 #define _ASM_TYPE_FUNCTION #function 65 #define _ASM_TYPE_OBJECT #object 66 67 /* XXX Is this still the right prologue for profiling? */ 68 #ifdef GPROF 69 #define _PROF_PROLOGUE \ 70 mov ip, lr; \ 71 bl __mcount 72 #else 73 #define _PROF_PROLOGUE 74 #endif 75 76 /* 77 * EENTRY()/EEND() mark "extra" entry/exit points from a function. 78 * The unwind info cannot handle the concept of a nested function, or a function 79 * with multiple .fnstart directives, but some of our assembler code is written 80 * with multiple labels to allow entry at several points. The EENTRY() macro 81 * defines such an extra entry point without a new .fnstart, so that it's 82 * basically just a label that you can jump to. The EEND() macro does nothing 83 * at all, except document the exit point associated with the same-named entry. 84 */ 85 #define _EENTRY(x) .globl x; .type x,_ASM_TYPE_FUNCTION; x: 86 #define _EEND(x) /* nothing */ 87 88 #define GLOBAL(X) .globl x 89 #define _ENTRY(x) .text; _ALIGN_TEXT; _EENTRY(x) _FNSTART 90 #define _END(x) .size x, . - x; _FNEND 91 92 #define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 93 #define EENTRY(y) _EENTRY(_C_LABEL(y)); 94 #define ENTRY_NP(y) _ENTRY(_C_LABEL(y)) 95 #define EENTRY_NP(y) _EENTRY(_C_LABEL(y)) 96 #define END(y) _END(_C_LABEL(y)) 97 #define EEND(y) _EEND(_C_LABEL(y)) 98 #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 99 #define ASEENTRY(y) _EENTRY(_ASM_LABEL(y)); 100 #define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y)) 101 #define ASEENTRY_NP(y) _EENTRY(_ASM_LABEL(y)) 102 #define ASEND(y) _END(_ASM_LABEL(y)) 103 #define ASEEND(y) _EEND(_ASM_LABEL(y)) 104 105 #define ASMSTR .asciz 106 107 #if defined(PIC) 108 #define PLT_SYM(x) PIC_SYM(x, PLT) 109 #define GOT_SYM(x) PIC_SYM(x, GOT) 110 #define GOT_GET(x,got,sym) \ 111 ldr x, sym; \ 112 ldr x, [x, got] 113 #define GOT_INIT(got,gotsym,pclabel) \ 114 ldr got, gotsym; \ 115 pclabel: add got, got, pc 116 #ifdef __thumb__ 117 #define GOT_INITSYM(gotsym,pclabel) \ 118 .align 0; \ 119 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+4) 120 #else 121 #define GOT_INITSYM(gotsym,pclabel) \ 122 .align 0; \ 123 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+8) 124 #endif 125 126 #ifdef __STDC__ 127 #define PIC_SYM(x,y) x ## ( ## y ## ) 128 #else 129 #define PIC_SYM(x,y) x/**/(/**/y/**/) 130 #endif 131 132 #else 133 #define PLT_SYM(x) x 134 #define GOT_SYM(x) x 135 #define GOT_GET(x,got,sym) \ 136 ldr x, sym; 137 #define GOT_INIT(got,gotsym,pclabel) 138 #define GOT_INITSYM(gotsym,pclabel) 139 #define PIC_SYM(x,y) x 140 #endif /* PIC */ 141 142 #undef __FBSDID 143 #if !defined(lint) && !defined(STRIP_FBSDID) 144 #define __FBSDID(s) .ident s 145 #else 146 #define __FBSDID(s) /* nothing */ 147 #endif 148 149 150 #define WEAK_ALIAS(alias,sym) \ 151 .weak alias; \ 152 alias = sym 153 154 #ifdef __STDC__ 155 #define WARN_REFERENCES(sym,msg) \ 156 .stabs msg ## ,30,0,0,0 ; \ 157 .stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0 158 #else 159 #define WARN_REFERENCES(sym,msg) \ 160 .stabs msg,30,0,0,0 ; \ 161 .stabs __STRING(sym),1,0,0,0 162 #endif /* __STDC__ */ 163 164 /* Exactly one of the __ARM_ARCH_*__ macros will be defined by the compiler. */ 165 /* The _ARM_ARCH_* macros are deprecated and will be removed soon. */ 166 /* This should be moved into another header so it can be used in 167 * both asm and C code. machine/asm.h cannot be included in C code. */ 168 #if defined (__ARM_ARCH_7__) || defined (__ARM_ARCH_7A__) 169 #define _ARM_ARCH_7 170 #define _HAVE_ARMv7_INSTRUCTIONS 1 171 #endif 172 173 #if defined (_HAVE_ARMv7_INSTRUCTIONS) || defined (__ARM_ARCH_6__) || \ 174 defined (__ARM_ARCH_6J__) || defined (__ARM_ARCH_6K__) || \ 175 defined (__ARM_ARCH_6Z__) || defined (__ARM_ARCH_6ZK__) 176 #define _ARM_ARCH_6 177 #define _HAVE_ARMv6_INSTRUCTIONS 1 178 #endif 179 180 #if defined (_HAVE_ARMv6_INSTRUCTIONS) || defined (__ARM_ARCH_5TE__) || \ 181 defined (__ARM_ARCH_5TEJ__) || defined (__ARM_ARCH_5E__) 182 #define _ARM_ARCH_5E 183 #define _HAVE_ARMv5E_INSTRUCTIONS 1 184 #endif 185 186 #if defined (_HAVE_ARMv5E_INSTRUCTIONS) || defined (__ARM_ARCH_5__) || \ 187 defined (__ARM_ARCH_5T__) 188 #define _ARM_ARCH_5 189 #define _HAVE_ARMv5_INSTRUCTIONS 1 190 #endif 191 192 #if defined (_HAVE_ARMv5_INSTRUCTIONS) || defined (__ARM_ARCH_4T__) 193 #define _ARM_ARCH_4T 194 #define _HAVE_ARMv4T_INSTRUCTIONS 1 195 #endif 196 197 /* FreeBSD requires ARMv4, so this is always set. */ 198 #define _HAVE_ARMv4_INSTRUCTIONS 1 199 200 #if defined (_HAVE_ARMv4T_INSTRUCTIONS) 201 # define RET bx lr 202 # define RETeq bxeq lr 203 # define RETne bxne lr 204 # define RETc(c) bx##c lr 205 #else 206 # define RET mov pc, lr 207 # define RETeq moveq pc, lr 208 # define RETne movne pc, lr 209 # define RETc(c) mov##c pc, lr 210 #endif 211 212 #endif /* !_MACHINE_ASM_H_ */ 213