asm.h revision 269796
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: stable/10/sys/arm/include/asm.h 269796 2014-08-11 01:29:28Z ian $ 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#define I32_bit (1 << 7) /* IRQ disable */ 47#define F32_bit (1 << 6) /* FIQ disable */ 48 49#define CPU_CONTROL_32BP_ENABLE 0x00000010 /* P: 32-bit exception handlers */ 50#define CPU_CONTROL_32BD_ENABLE 0x00000020 /* D: 32-bit addressing */ 51 52#ifndef _ALIGN_TEXT 53# define _ALIGN_TEXT .align 0 54#endif 55 56#ifdef __ARM_EABI__ 57#define STOP_UNWINDING .cantunwind 58#define _FNSTART .fnstart 59#define _FNEND .fnend 60#else 61#define STOP_UNWINDING 62#define _FNSTART 63#define _FNEND 64#endif 65 66/* 67 * gas/arm uses @ as a single comment character and thus cannot be used here 68 * Instead it recognised the # instead of an @ symbols in .type directives 69 * We define a couple of macros so that assembly code will not be dependent 70 * on one or the other. 71 */ 72#define _ASM_TYPE_FUNCTION #function 73#define _ASM_TYPE_OBJECT #object 74#define GLOBAL(X) .globl x 75#define _ENTRY(x) \ 76 .text; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; x: _FNSTART 77#define _END(x) .size x, . - x; _FNEND 78 79/* 80 * EENTRY()/EEND() mark "extra" entry/exit points from a function. 81 * The unwind info cannot handle the concept of a nested function, or a function 82 * with multiple .fnstart directives, but some of our assembler code is written 83 * with multiple labels to allow entry at several points. The EENTRY() macro 84 * defines such an extra entry point without a new .fnstart, so that it's 85 * basically just a label that you can jump to. The EEND() macro does nothing 86 * at all, except document the exit point associated with the same-named entry. 87 */ 88#define _EENTRY(x) .globl x; .type x,_ASM_TYPE_FUNCTION; x: 89#define _EEND(x) /* nothing */ 90 91#ifdef GPROF 92# define _PROF_PROLOGUE \ 93 mov ip, lr; bl __mcount 94#else 95# define _PROF_PROLOGUE 96#endif 97 98#define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE 99#define EENTRY(y) _EENTRY(_C_LABEL(y)); _PROF_PROLOGUE 100#define ENTRY_NP(y) _ENTRY(_C_LABEL(y)) 101#define EENTRY_NP(y) _EENTRY(_C_LABEL(y)) 102#define END(y) _END(_C_LABEL(y)) 103#define EEND(y) 104#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 105#define ASEENTRY(y) _EENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE 106#define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y)) 107#define ASEENTRY_NP(y) _EENTRY(_ASM_LABEL(y)) 108#define ASEND(y) _END(_ASM_LABEL(y)) 109#define ASEEND(y) 110 111#define ASMSTR .asciz 112 113#if defined(PIC) 114#define PLT_SYM(x) PIC_SYM(x, PLT) 115#define GOT_SYM(x) PIC_SYM(x, GOT) 116#define GOT_GET(x,got,sym) \ 117 ldr x, sym; \ 118 ldr x, [x, got] 119#define GOT_INIT(got,gotsym,pclabel) \ 120 ldr got, gotsym; \ 121 add got, got, pc; \ 122 pclabel: 123#define GOT_INITSYM(gotsym,pclabel) \ 124 gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) + (. - (pclabel+4)) 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