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asm.h revision 1.18 
      1 /*	$NetBSD: asm.h,v 1.18 2005/12/24 21:10:28 uwe 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  *	@(#)asm.h	5.5 (Berkeley) 5/7/91
     35  */
     36 
     37 #ifndef _SH3_ASM_H_
     38 #define	_SH3_ASM_H_
     39 
     40 #define	PIC_PROLOGUE
     41 #define	PIC_EPILOGUE
     42 #define	PIC_PLT(x)	x
     43 #define	PIC_GOT(x)	x
     44 #define	PIC_GOTOFF(x)	x
     45 
     46 /*
     47  * The old NetBSD/sh3 ELF toolchain used underscores.  The new
     48  * NetBSD/sh3 ELF toolchain does not.  The C pre-processor
     49  * defines __NO_LEADING_UNDERSCORES__ for the new ELF toolchain.
     50  */
     51 
     52 #if defined(__ELF__) && defined(__NO_LEADING_UNDERSCORES__)
     53 # define _C_LABEL(x)	x
     54 #else
     55 #ifdef __STDC__
     56 # define _C_LABEL(x)	_ ## x
     57 #else
     58 # define _C_LABEL(x)	_/**/x
     59 #endif
     60 #endif
     61 #define	_ASM_LABEL(x)	x
     62 
     63 /* let kernels and others override entrypoint alignment */
     64 #ifndef _ALIGN_TEXT
     65 # define _ALIGN_TEXT .align 2
     66 #endif
     67 
     68 #ifdef __ELF__
     69 #define	_ENTRY(x)							\
     70 	.text								;\
     71 	_ALIGN_TEXT							;\
     72 	.globl x							;\
     73 	.type x,@function						;\
     74 	x:
     75 #else /* !__ELF__ */
     76 #define	_ENTRY(x)							\
     77 	.text								;\
     78 	_ALIGN_TEXT							;\
     79 	.globl x							;\
     80 	x:
     81 #endif /* !__ELF__ */
     82 
     83 #ifdef GPROF
     84 #define	_PROF_PROLOGUE				  \
     85 	mov.l	1f,r1				; \
     86 	mova	2f,r0				; \
     87 	jmp	@r1				; \
     88 	 nop					; \
     89 	.align	2				; \
     90 1:	.long	__mcount			; \
     91 2:
     92 #else  /* !GPROF */
     93 #define	_PROF_PROLOGUE
     94 #endif /* !GPROF */
     95 
     96 #define	ENTRY(y)	_ENTRY(_C_LABEL(y)) _PROF_PROLOGUE
     97 #define	NENTRY(y)	_ENTRY(_C_LABEL(y))
     98 #define	ASENTRY(y)	_ENTRY(_ASM_LABEL(y)) _PROF_PROLOGUE
     99 
    100 #ifdef __ELF__
    101 #define	ALTENTRY(name)				 \
    102 	.globl _C_LABEL(name)			;\
    103 	.type _C_LABEL(name),@function		;\
    104 	_C_LABEL(name):
    105 #else
    106 #define	ALTENTRY(name)				 \
    107 	.globl _C_LABEL(name)			;\
    108 	_C_LABEL(name):
    109 #endif
    110 
    111 #define	ASMSTR		.asciz
    112 
    113 #ifdef __ELF__
    114 #define RCSID(x)	.section .ident; .asciz x; .previous
    115 #else
    116 #define	RCSID(x)	.text; .asciz x
    117 #endif
    118 
    119 #ifdef NO_KERNEL_RCSIDS
    120 #define	__KERNEL_RCSID(_n, _s)	/* nothing */
    121 #else
    122 #define	__KERNEL_RCSID(_n, _s)	RCSID(_s)
    123 #endif
    124 
    125 #ifdef __ELF__
    126 #define	WEAK_ALIAS(alias,sym)						\
    127 	.weak _C_LABEL(alias);						\
    128 	_C_LABEL(alias) = _C_LABEL(sym)
    129 #endif
    130 
    131 #ifdef __STDC__
    132 #define	__STRING(x)			#x
    133 #define	WARN_REFERENCES(sym, msg)
    134 #else
    135 #define	__STRING(x)			"x"
    136 #define	WARN_REFERENCES(sym, msg)
    137 #endif /* __STDC__ */
    138 
    139 #endif /* !_SH3_ASM_H_ */
    140