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Annotation of sys/arch/arm/include/asm.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: asm.h,v 1.1 2004/02/01 05:09:49 drahn Exp $   */
                      2: /*     $NetBSD: asm.h,v 1.4 2001/07/16 05:43:32 matt Exp $     */
                      3:
                      4: /*
                      5:  * Copyright (c) 1990 The Regents of the University of California.
                      6:  * All rights reserved.
                      7:  *
                      8:  * This code is derived from software contributed to Berkeley by
                      9:  * William Jolitz.
                     10:  *
                     11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
                     19:  * 3. Neither the name of the University nor the names of its contributors
                     20:  *    may be used to endorse or promote products derived from this software
                     21:  *    without specific prior written permission.
                     22:  *
                     23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     33:  * SUCH DAMAGE.
                     34:  *
                     35:  *     from: @(#)asm.h 5.5 (Berkeley) 5/7/91
                     36:  */
                     37:
                     38: #ifndef _ARM32_ASM_H_
                     39: #define _ARM32_ASM_H_
                     40:
                     41: #ifdef __ELF__
                     42: # define _C_LABEL(x)   x
                     43: #else
                     44: # ifdef __STDC__
                     45: #  define _C_LABEL(x)  _ ## x
                     46: # else
                     47: #  define _C_LABEL(x)  _/**/x
                     48: # endif
                     49: #endif
                     50: #define        _ASM_LABEL(x)   x
                     51:
                     52: #ifdef __STDC__
                     53: # define __CONCAT(x,y) x ## y
                     54: # define __STRING(x)   #x
                     55: #else
                     56: # define __CONCAT(x,y) x/**/y
                     57: # define __STRING(x)   "x"
                     58: #endif
                     59:
                     60: #ifndef _ALIGN_TEXT
                     61: # define _ALIGN_TEXT .align 0
                     62: #endif
                     63:
                     64: /*
                     65:  * gas/arm uses @ as a single comment character and thus cannot be used here
                     66:  * Instead it recognised the # instead of an @ symbols in .type directives
                     67:  * We define a couple of macros so that assembly code will not be dependant
                     68:  * on one or the other.
                     69:  */
                     70: #define _ASM_TYPE_FUNCTION     #function
                     71: #define _ASM_TYPE_OBJECT       #object
                     72: #define _ENTRY(x) \
                     73:        .text; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; x:
                     74:
                     75: #ifdef GPROF
                     76: # ifdef __ELF__
                     77: #  define _PROF_PROLOGUE       \
                     78:        mov ip, lr; bl __mcount
                     79: # else
                     80: #  define _PROF_PROLOGUE       \
                     81:        mov ip,lr; bl mcount
                     82: # endif
                     83: #else
                     84: # define _PROF_PROLOGUE
                     85: #endif
                     86:
                     87: #define        ENTRY(y)        _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
                     88: #define        ENTRY_NP(y)     _ENTRY(_C_LABEL(y))
                     89: #define        ASENTRY(y)      _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
                     90: #define        ASENTRY_NP(y)   _ENTRY(_ASM_LABEL(y))
                     91:
                     92: #define        ASMSTR          .asciz
                     93:
                     94: #if defined(__ELF__) && defined(PIC)
                     95: #ifdef __STDC__
                     96: #define        PIC_SYM(x,y)    x ## ( ## y ## )
                     97: #else
                     98: #define        PIC_SYM(x,y)    x/**/(/**/y/**/)
                     99: #endif
                    100: #else
                    101: #define        PIC_SYM(x,y)    x
                    102: #endif
                    103:
                    104: #ifdef __ELF__
                    105: #define RCSID(x)       .section ".ident"; .asciz x
                    106: #else
                    107: #define RCSID(x)       .text; .asciz x
                    108: #endif
                    109:
                    110: #ifdef __ELF__
                    111: #define        WEAK_ALIAS(alias,sym)                                           \
                    112:        .weak alias;                                                    \
                    113:        alias = sym
                    114: #endif
                    115:
                    116: #ifdef __STDC__
                    117: #define        WARN_REFERENCES(sym,msg)                                        \
                    118:        .stabs msg ## ,30,0,0,0 ;                                       \
                    119:        .stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0
                    120: #elif defined(__ELF__)
                    121: #define        WARN_REFERENCES(sym,msg)                                        \
                    122:        .stabs msg,30,0,0,0 ;                                           \
                    123:        .stabs __STRING(sym),1,0,0,0
                    124: #else
                    125: #define        WARN_REFERENCES(sym,msg)                                        \
                    126:        .stabs msg,30,0,0,0 ;                                           \
                    127:        .stabs __STRING(_/**/sym),1,0,0,0
                    128: #endif /* __STDC__ */
                    129:
                    130: #endif /* !_ARM_ASM_H_ */