usr/include/arch/sparc/machine/asm.h - maze/klibc - Git at Google

 /*	$NetBSD: asm.h,v 1.14 2002/07/20 08:37:30 mrg Exp $ */

 /*
  * Copyright (c) 1994 Allen Briggs
  * All rights reserved.
  *
  * Gleaned from locore.s and sun3 asm.h which had the following copyrights:
  * locore.s:
  * Copyright (c) 1988 University of Utah.
  * Copyright (c) 1982, 1990 The Regents of the University of California.
  * sun3/include/asm.h:
  * Copyright (c) 1993 Adam Glass
  * Copyright (c) 1990 The Regents of the University of California.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. All advertising materials mentioning features or use of this software
  *    must display the following acknowledgement:
  *	This product includes software developed by the University of
  *	California, Berkeley and its contributors.
  * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */

 #ifndef _ASM_H_
 #define _ASM_H_

 /* Pull in CCFSZ, CC64FSZ, and BIAS from frame.h */
 #ifndef _LOCORE
 #define _LOCORE
 #endif
 #include <machine/frame.h>

 #ifdef __ELF__
 #define	_C_LABEL(name)		name
 #else
 #ifdef __STDC__
 #define _C_LABEL(name)		_ ## name
 #else
 #define _C_LABEL(name)		_/**/name
 #endif
 #endif
 #define	_ASM_LABEL(name)	name

 #ifdef PIC
 /*
  * PIC_PROLOGUE() is akin to the compiler generated function prologue for
  * PIC code. It leaves the address of the Global Offset Table in DEST,
  * clobbering register TMP in the process.
  *
  * We can use two code sequences.  We can read the %pc or use the call
  * instruction that saves the pc in %o7.  Call requires the branch unit and
  * IEU1, and clobbers %o7 which needs to be restored.  This instruction
  * sequence takes about 4 cycles due to instruction interdependence.  Reading
  * the pc takes 4 cycles to dispatch and is always dispatched alone.  That
  * sequence takes 7 cycles.
  */
 #ifdef __arch64__
 #define PIC_PROLOGUE(dest,tmp) \
 	mov %o7, tmp; \
 	sethi %hi(_GLOBAL_OFFSET_TABLE_-4),dest; \
 	call 0f; \
 	 or dest,%lo(_GLOBAL_OFFSET_TABLE_+4),dest; \
 0: \
 	add dest,%o7,dest; \
 	mov tmp, %o7
 #else
 #define PIC_PROLOGUE(dest,tmp) \
 	mov %o7,tmp; 3: call 4f; nop; 4: \
 	sethi %hi(_C_LABEL(_GLOBAL_OFFSET_TABLE_)-(3b-.)),dest; \
 	or dest,%lo(_C_LABEL(_GLOBAL_OFFSET_TABLE_)-(3b-.)),dest; \
 	add dest,%o7,dest; mov tmp,%o7
 #endif

 /*
  * PICCY_SET() does the equivalent of a `set var, %dest' instruction in
  * a PIC-like way, but without involving the Global Offset Table. This
  * only works for VARs defined in the same file *and* in the text segment.
  */
 #ifdef __arch64__
 #define PICCY_SET(var,dest,tmp) \
 	3: rd %pc, tmp; add tmp,(var-3b),dest
 #else
 #define PICCY_SET(var,dest,tmp) \
 	mov %o7,tmp; 3: call 4f; nop; 4: \
 	add %o7,(var-3b),dest; mov tmp,%o7
 #endif
 #else
 #define PIC_PROLOGUE(dest,tmp)
 #define PICCY_OFFSET(var,dest,tmp)
 #endif

 #define FTYPE(x)		.type x,@function
 #define OTYPE(x)		.type x,@object

 #define	_ENTRY(name) \
 	.align 4; .globl name; .proc 1; FTYPE(name); name:

 #ifdef GPROF
 /* see _MCOUNT_ENTRY in profile.h */
 #ifdef __ELF__
 #ifdef __arch64__
 #define _PROF_PROLOGUE \
 	.data; .align 8; 1: .uaword 0; .uaword 0; \
 	.text; save %sp,-CC64FSZ,%sp; sethi %hi(1b),%o0; call _mcount; \
 	or %o0,%lo(1b),%o0; restore
 #else
 #define _PROF_PROLOGUE \
 	.data; .align 4; 1: .long 0; \
 	.text; save %sp,-96,%sp; sethi %hi(1b),%o0; call _mcount; \
 	or %o0,%lo(1b),%o0; restore
 #endif
 #else
 #ifdef __arch64__
 #define _PROF_PROLOGUE \
 	.data; .align 8; 1: .uaword 0; .uaword 0; \
 	.text; save %sp,-CC64FSZ,%sp; sethi %hi(1b),%o0; call mcount; \
 	or %o0,%lo(1b),%o0; restore
 #else
 #define	_PROF_PROLOGUE \
 	.data; .align 4; 1: .long 0; \
 	.text; save %sp,-96,%sp; sethi %hi(1b),%o0; call mcount; \
 	or %o0,%lo(1b),%o0; restore
 #endif
 #endif
 #else
 #define _PROF_PROLOGUE
 #endif

 #define ENTRY(name)		_ENTRY(_C_LABEL(name)); _PROF_PROLOGUE
 #define ENTRY_NOPROFILE(name)	_ENTRY(_C_LABEL(name))
 #define	ASENTRY(name)		_ENTRY(_ASM_LABEL(name)); _PROF_PROLOGUE
 #define	FUNC(name)		ASENTRY(name)
 #define RODATA(name)		.align 4; .text; .globl _C_LABEL(name); \
 				OTYPE(_C_LABEL(name)); _C_LABEL(name):

 #define ASMSTR			.asciz

 #define RCSID(name)		.asciz name

 #ifdef __ELF__
 #define	WEAK_ALIAS(alias,sym)						\
 	.weak alias;							\
 	alias = sym
 #endif

 /*
  * WARN_REFERENCES: create a warning if the specified symbol is referenced.
  */
 #ifdef __ELF__
 #ifdef __STDC__
 #define	WARN_REFERENCES(_sym,_msg)				\
 	.section .gnu.warning. ## _sym ; .ascii _msg ; .text
 #else
 #define	WARN_REFERENCES(_sym,_msg)				\
 	.section .gnu.warning./**/_sym ; .ascii _msg ; .text
 #endif				/* __STDC__ */
 #else
 #ifdef __STDC__
 #define	__STRING(x)			#x
 #define	WARN_REFERENCES(sym,msg)					\
 	.stabs msg ## ,30,0,0,0 ;					\
 	.stabs __STRING(_ ## sym) ## ,1,0,0,0
 #else
 #define	__STRING(x)			"x"
 #define	WARN_REFERENCES(sym,msg)					\
 	.stabs msg,30,0,0,0 ;						\
 	.stabs __STRING(_/**/sym),1,0,0,0
 #endif				/* __STDC__ */
 #endif				/* __ELF__ */

 #endif				/* _ASM_H_ */
	/* $NetBSD: asm.h,v 1.14 2002/07/20 08:37:30 mrg Exp $ */

	/*
	* Copyright (c) 1994 Allen Briggs
	* All rights reserved.
	*
	* Gleaned from locore.s and sun3 asm.h which had the following copyrights:
	* locore.s:
	* Copyright (c) 1988 University of Utah.
	* Copyright (c) 1982, 1990 The Regents of the University of California.
	* sun3/include/asm.h:
	* Copyright (c) 1993 Adam Glass
	* Copyright (c) 1990 The Regents of the University of California.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	* 3. All advertising materials mentioning features or use of this software
	* must display the following acknowledgement:
	* This product includes software developed by the University of
	* California, Berkeley and its contributors.
	* 4. Neither the name of the University nor the names of its contributors
	* may be used to endorse or promote products derived from this software
	* without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	* SUCH DAMAGE.
	*/

	#ifndef _ASM_H_
	#define _ASM_H_

	/* Pull in CCFSZ, CC64FSZ, and BIAS from frame.h */
	#ifndef _LOCORE
	#define _LOCORE
	#endif
	#include <machine/frame.h>

	#ifdef __ELF__
	#define _C_LABEL(name) name
	#else
	#ifdef __STDC__
	#define _C_LABEL(name) _ ## name
	#else
	#define _C_LABEL(name) _/**/name
	#endif
	#endif
	#define _ASM_LABEL(name) name

	#ifdef PIC
	/*
	* PIC_PROLOGUE() is akin to the compiler generated function prologue for
	* PIC code. It leaves the address of the Global Offset Table in DEST,
	* clobbering register TMP in the process.
	*
	* We can use two code sequences. We can read the %pc or use the call
	* instruction that saves the pc in %o7. Call requires the branch unit and
	* IEU1, and clobbers %o7 which needs to be restored. This instruction
	* sequence takes about 4 cycles due to instruction interdependence. Reading
	* the pc takes 4 cycles to dispatch and is always dispatched alone. That
	* sequence takes 7 cycles.
	*/
	#ifdef __arch64__
	#define PIC_PROLOGUE(dest,tmp) \
	mov %o7, tmp; \
	sethi %hi(_GLOBAL_OFFSET_TABLE_-4),dest; \
	call 0f; \
	or dest,%lo(_GLOBAL_OFFSET_TABLE_+4),dest; \
	0: \
	add dest,%o7,dest; \
	mov tmp, %o7
	#else
	#define PIC_PROLOGUE(dest,tmp) \
	mov %o7,tmp; 3: call 4f; nop; 4: \
	sethi %hi(_C_LABEL(_GLOBAL_OFFSET_TABLE_)-(3b-.)),dest; \
	or dest,%lo(_C_LABEL(_GLOBAL_OFFSET_TABLE_)-(3b-.)),dest; \
	add dest,%o7,dest; mov tmp,%o7
	#endif

	/*
	* PICCY_SET() does the equivalent of a `set var, %dest' instruction in
	* a PIC-like way, but without involving the Global Offset Table. This
	* only works for VARs defined in the same file and in the text segment.
	*/
	#ifdef __arch64__
	#define PICCY_SET(var,dest,tmp) \
	3: rd %pc, tmp; add tmp,(var-3b),dest
	#else
	#define PICCY_SET(var,dest,tmp) \
	mov %o7,tmp; 3: call 4f; nop; 4: \
	add %o7,(var-3b),dest; mov tmp,%o7
	#endif
	#else
	#define PIC_PROLOGUE(dest,tmp)
	#define PICCY_OFFSET(var,dest,tmp)
	#endif

	#define FTYPE(x) .type x,@function
	#define OTYPE(x) .type x,@object

	#define _ENTRY(name) \
	.align 4; .globl name; .proc 1; FTYPE(name); name:

	#ifdef GPROF
	/* see _MCOUNT_ENTRY in profile.h */
	#ifdef __ELF__
	#ifdef __arch64__
	#define _PROF_PROLOGUE \
	.data; .align 8; 1: .uaword 0; .uaword 0; \
	.text; save %sp,-CC64FSZ,%sp; sethi %hi(1b),%o0; call _mcount; \
	or %o0,%lo(1b),%o0; restore
	#else
	#define _PROF_PROLOGUE \
	.data; .align 4; 1: .long 0; \
	.text; save %sp,-96,%sp; sethi %hi(1b),%o0; call _mcount; \
	or %o0,%lo(1b),%o0; restore
	#endif
	#else
	#ifdef __arch64__
	#define _PROF_PROLOGUE \
	.data; .align 8; 1: .uaword 0; .uaword 0; \
	.text; save %sp,-CC64FSZ,%sp; sethi %hi(1b),%o0; call mcount; \
	or %o0,%lo(1b),%o0; restore
	#else
	#define _PROF_PROLOGUE \
	.data; .align 4; 1: .long 0; \
	.text; save %sp,-96,%sp; sethi %hi(1b),%o0; call mcount; \
	or %o0,%lo(1b),%o0; restore
	#endif
	#endif
	#else
	#define _PROF_PROLOGUE
	#endif

	#define ENTRY(name) _ENTRY(_C_LABEL(name)); _PROF_PROLOGUE
	#define ENTRY_NOPROFILE(name) _ENTRY(_C_LABEL(name))
	#define ASENTRY(name) _ENTRY(_ASM_LABEL(name)); _PROF_PROLOGUE
	#define FUNC(name) ASENTRY(name)
	#define RODATA(name) .align 4; .text; .globl _C_LABEL(name); \
	OTYPE(_C_LABEL(name)); _C_LABEL(name):

	#define ASMSTR .asciz

	#define RCSID(name) .asciz name

	#ifdef __ELF__
	#define WEAK_ALIAS(alias,sym) \
	.weak alias; \
	alias = sym
	#endif

	/*
	* WARN_REFERENCES: create a warning if the specified symbol is referenced.
	*/
	#ifdef __ELF__
	#ifdef __STDC__
	#define WARN_REFERENCES(_sym,_msg) \
	.section .gnu.warning. ## _sym ; .ascii _msg ; .text
	#else
	#define WARN_REFERENCES(_sym,_msg) \
	.section .gnu.warning./**/_sym ; .ascii _msg ; .text
	#endif /* __STDC__ */
	#else
	#ifdef __STDC__
	#define __STRING(x) #x
	#define WARN_REFERENCES(sym,msg) \
	.stabs msg ## ,30,0,0,0 ; \
	.stabs __STRING(_ ## sym) ## ,1,0,0,0
	#else
	#define __STRING(x) "x"
	#define WARN_REFERENCES(sym,msg) \
	.stabs msg,30,0,0,0 ; \
	.stabs __STRING(_/**/sym),1,0,0,0
	#endif /* __STDC__ */
	#endif /* __ELF__ */

	#endif /* _ASM_H_ */