StdLib/Include/Arm/machine/asm.h

   1 /*      $NetBSD: asm.h,v 1.8 2006/01/20 22:02:40 christos 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
  37 #ifndef _ARM32_ASM_H_
  38 #define _ARM32_ASM_H_
  39
  40 #ifdef __ELF__
  41 # define _C_LABEL(x)    x
  42 #else
  43 # ifdef __STDC__
  44 #  define _C_LABEL(x)   _ ## x
  45 # else
  46 #  define _C_LABEL(x)   _/**/x
  47 # endif
  48 #endif
  49 #define _ASM_LABEL(x)   x
  50
  51 #ifdef __STDC__
  52 # define __CONCAT(x,y)  x ## y
  53 # define __STRING(x)    #x
  54 #else
  55 # define __CONCAT(x,y)  x/**/y
  56 # define __STRING(x)    "x"
  57 #endif
  58
  59 #ifndef _ALIGN_TEXT
  60 # define _ALIGN_TEXT .align 0
  61 #endif
  62
  63 /*
  64  * gas/arm uses @ as a single comment character and thus cannot be used here
  65  * Instead it recognised the # instead of an @ symbols in .type directives
  66  * We define a couple of macros so that assembly code will not be dependant
  67  * on one or the other.
  68  */
  69 #define _ASM_TYPE_FUNCTION      #function
  70 #define _ASM_TYPE_OBJECT        #object
  71 #define _ENTRY(x) \
  72         .text; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; x:
  73
  74 #ifdef GPROF
  75 # ifdef __ELF__
  76 #  define _PROF_PROLOGUE        \
  77         mov ip, lr; bl __mcount
  78 # else
  79 #  define _PROF_PROLOGUE        \
  80         mov ip,lr; bl mcount
  81 # endif
  82 #else
  83 # define _PROF_PROLOGUE
  84 #endif
  85
  86 #define ENTRY(y)        _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
  87 #define ENTRY_NP(y)     _ENTRY(_C_LABEL(y))
  88 #define ASENTRY(y)      _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
  89 #define ASENTRY_NP(y)   _ENTRY(_ASM_LABEL(y))
  90
  91 #define ASMSTR          .asciz
  92
  93 #if defined(__ELF__) && defined(PIC)
  94 #ifdef __STDC__
  95 #define PIC_SYM(x,y)    x ## ( ## y ## )
  96 #else
  97 #define PIC_SYM(x,y)    x/**/(/**/y/**/)
  98 #endif
  99 #else
 100 #define PIC_SYM(x,y)    x
 101 #endif
 102
 103 #ifdef __ELF__
 104 #define RCSID(x)        .section ".ident"; .asciz x
 105 #else
 106 #define RCSID(x)        .text; .asciz x
 107 #endif
 108
 109 #ifdef __ELF__
 110 #define WEAK_ALIAS(alias,sym)                                           \
 111         .weak alias;                                                    \
 112         alias = sym
 113 #endif
 114
 115 /*
 116  * STRONG_ALIAS: create a strong alias.
 117  */
 118 #define STRONG_ALIAS(alias,sym)                                         \
 119         .globl alias;                                                   \
 120         alias = sym
 121
 122 #ifdef __STDC__
 123 #define WARN_REFERENCES(sym,msg)                                        \
 124         .stabs msg ## ,30,0,0,0 ;                                       \
 125         .stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0
 126 #elif defined(__ELF__)
 127 #define WARN_REFERENCES(sym,msg)                                        \
 128         .stabs msg,30,0,0,0 ;                                           \
 129         .stabs __STRING(sym),1,0,0,0
 130 #else
 131 #define WARN_REFERENCES(sym,msg)                                        \
 132         .stabs msg,30,0,0,0 ;                                           \
 133         .stabs __STRING(_/**/sym),1,0,0,0
 134 #endif /* __STDC__ */
 135
 136 #if defined (__ARM_ARCH_6__) || defined (__ARM_ARCH_6J__)
 137 #define _ARM_ARCH_6
 138 #endif
 139
 140 #if defined (_ARM_ARCH_6) || defined (__ARM_ARCH_5__) || \
 141     defined (__ARM_ARCH_5T__) || defined (__ARM_ARCH_5TE__) || \
 142     defined (__ARM_ARCH_5TEJ__)
 143 #define _ARM_ARCH_5
 144 #endif
 145
 146 #if defined (_ARM_ARCH_5) || defined (__ARM_ARCH_4T__)
 147 #define _ARM_ARCH_4T
 148 #endif
 149
 150
 151 #if defined (_ARM_ARCH_4T)
 152 # define RET    bx      lr
 153 # ifdef __STDC__
 154 #  define RETc(c) bx##c lr
 155 # else
 156 #  define RETc(c) bx/**/c       lr
 157 # endif
 158 #else
 159 # define RET    mov     pc, lr
 160 # ifdef __STDC__
 161 #  define RETc(c) mov##c        pc, lr
 162 # else
 163 #  define RETc(c) mov/**/c      pc, lr
 164 # endif
 165 #endif
 166
 167 #endif /* !_ARM_ASM_H_ */