asm.h revision 275264
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: head/sys/arm/include/asm.h 275264 2014-11-29 19:31:23Z andrew $ 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 * EENTRY()/EEND() mark "extra" entry/exit points from a function. 62 * The unwind info cannot handle the concept of a nested function, or a function 63 * with multiple .fnstart directives, but some of our assembler code is written 64 * with multiple labels to allow entry at several points. The EENTRY() macro 65 * defines such an extra entry point without a new .fnstart, so that it's 66 * basically just a label that you can jump to. The EEND() macro does nothing 67 * at all, except document the exit point associated with the same-named entry. 68 */ 69#define _EENTRY(x) .globl x; .type x,_ASM_TYPE_FUNCTION; x: 70#define _EEND(x) /* nothing */ 71 72/* 73 * gas/arm uses @ as a single comment character and thus cannot be used here 74 * Instead it recognised the # instead of an @ symbols in .type directives 75 * We define a couple of macros so that assembly code will not be dependent 76 * on one or the other. 77 */ 78#define _ASM_TYPE_FUNCTION #function 79#define _ASM_TYPE_OBJECT #object 80#define GLOBAL(X) .globl x 81#define _ENTRY(x) \ 82 .text; _ALIGN_TEXT; _EENTRY(x) _FNSTART 83#define _END(x) .size x, . - x; _FNEND 84 85#ifdef GPROF 86# define _PROF_PROLOGUE \ 87 mov ip, lr; bl __mcount 88#else 89# define _PROF_PROLOGUE 90#endif 91 92#define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 93#define EENTRY(y) _EENTRY(_C_LABEL(y)); _PROF_PROLOGUE 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) 98#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 99#define ASEENTRY(y) _EENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 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) 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 add got, got, pc; \ 116 pclabel: 117#define GOT_INITSYM(gotsym,pclabel) \ 118 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) + (. - (pclabel+4)) 119 120#ifdef __STDC__ 121#define PIC_SYM(x,y) x ## ( ## y ## ) 122#else 123#define PIC_SYM(x,y) x/**/(/**/y/**/) 124#endif 125 126#else 127#define PLT_SYM(x) x 128#define GOT_SYM(x) x 129#define GOT_GET(x,got,sym) \ 130 ldr x, sym; 131#define GOT_INIT(got,gotsym,pclabel) 132#define GOT_INITSYM(gotsym,pclabel) 133#define PIC_SYM(x,y) x 134#endif /* PIC */ 135 136#undef __FBSDID 137#if !defined(lint) && !defined(STRIP_FBSDID) 138#define __FBSDID(s) .ident s 139#else 140#define __FBSDID(s) /* nothing */ 141#endif 142 143 144#define WEAK_ALIAS(alias,sym) \ 145 .weak alias; \ 146 alias = sym 147 148#ifdef __STDC__ 149#define WARN_REFERENCES(sym,msg) \ 150 .stabs msg ## ,30,0,0,0 ; \ 151 .stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0 152#else 153#define WARN_REFERENCES(sym,msg) \ 154 .stabs msg,30,0,0,0 ; \ 155 .stabs __STRING(sym),1,0,0,0 156#endif /* __STDC__ */ 157 158/* Exactly one of the __ARM_ARCH_*__ macros will be defined by the compiler. */ 159/* The _ARM_ARCH_* macros are deprecated and will be removed soon. */ 160/* This should be moved into another header so it can be used in 161 * both asm and C code. machine/asm.h cannot be included in C code. */ 162#if defined (__ARM_ARCH_7__) || defined (__ARM_ARCH_7A__) 163#define _ARM_ARCH_7 164#define _HAVE_ARMv7_INSTRUCTIONS 1 165#endif 166 167#if defined (_HAVE_ARMv7_INSTRUCTIONS) || defined (__ARM_ARCH_6__) || \ 168 defined (__ARM_ARCH_6J__) || defined (__ARM_ARCH_6K__) || \ 169 defined (__ARM_ARCH_6Z__) || defined (__ARM_ARCH_6ZK__) 170#define _ARM_ARCH_6 171#define _HAVE_ARMv6_INSTRUCTIONS 1 172#endif 173 174#if defined (_HAVE_ARMv6_INSTRUCTIONS) || defined (__ARM_ARCH_5TE__) || \ 175 defined (__ARM_ARCH_5TEJ__) || defined (__ARM_ARCH_5E__) 176#define _ARM_ARCH_5E 177#define _HAVE_ARMv5E_INSTRUCTIONS 1 178#endif 179 180#if defined (_HAVE_ARMv5E_INSTRUCTIONS) || defined (__ARM_ARCH_5__) || \ 181 defined (__ARM_ARCH_5T__) 182#define _ARM_ARCH_5 183#define _HAVE_ARMv5_INSTRUCTIONS 1 184#endif 185 186#if defined (_HAVE_ARMv5_INSTRUCTIONS) || defined (__ARM_ARCH_4T__) 187#define _ARM_ARCH_4T 188#define _HAVE_ARMv4T_INSTRUCTIONS 1 189#endif 190 191/* FreeBSD requires ARMv4, so this is always set. */ 192#define _HAVE_ARMv4_INSTRUCTIONS 1 193 194#if defined (_HAVE_ARMv4T_INSTRUCTIONS) 195# define RET bx lr 196# define RETeq bxeq lr 197# define RETne bxne lr 198# define RETc(c) bx##c lr 199#else 200# define RET mov pc, lr 201# define RETeq moveq pc, lr 202# define RETne movne pc, lr 203# define RETc(c) mov##c pc, lr 204#endif 205 206#endif /* !_MACHINE_ASM_H_ */ 207