asm_linkage.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _IA32_SYS_ASM_LINKAGE_H
#define _IA32_SYS_ASM_LINKAGE_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _ASM /* The remainder of this file is only for assembly files */
/*
* make annoying differences in assembler syntax go away
*/
/*
* D16 and A16 are used to insert instructions prefixes; the
* macros help the assembler code be slightly more portable.
*/
#if !defined(__GNUC_AS__)
/*
*/
/*
* (There are some weird constructs in constant expressions)
*/
#define _CONST(const) [const]
#else
/*
* Why not use the 'data16' and 'addr16' prefixes .. well, the
* assembler doesn't quite believe in real mode, and thus argues with
* us about what we're trying to do.
*/
#define _CONST(const) (const)
#endif
/*
* C pointers are different sizes between i386 and amd64.
* These constants can be used to compute offsets into pointer arrays.
*/
#if defined(__amd64)
#define CLONGSHIFT 3
#define CLONGSIZE 8
#define CLONGMASK 7
#define CLONGSHIFT 2
#define CLONGSIZE 4
#define CLONGMASK 3
#endif
/*
* Since we know we're either ILP32 or LP64 ..
*/
#define CPTRSHIFT CLONGSHIFT
#error "inconsistent shift constants"
#endif
#error "inconsistent mask constants"
#endif
#define ASM_ENTRY_ALIGN 16
/*
* SSE register alignment and save areas
*/
#define XMM_SIZE 16
#define XMM_ALIGN 16
#if defined(__amd64)
#endif /* __i386 */
/*
* profiling causes definitions of the MCOUNT and RTMCOUNT
* particular to the type
*/
#ifdef GPROF
#define MCOUNT(x) \
#endif /* GPROF */
#ifdef PROF
#define MCOUNT(x) \
/* CSTYLED */ \
/* CSTYLED */ \
#endif /* PROF */
/*
* if we are not profiling, MCOUNT should be defined to nothing
*/
#define MCOUNT(x)
#endif /* !defined(PROF) && !defined(GPROF) */
/*
* Macro to define weak symbol aliases. These are similar to the ANSI-C
* #pragma weak name = _name
* except a compiler can determine type. The assembler must be told. Hence,
* the second parameter must be the type of the symbol (i.e.: function,...)
*/
/* CSTYLED */ \
/*
* Like ANSI_PRAGMA_WEAK(), but for unrelated names, as in:
* #pragma weak sym1 = sym2
*/
/*
* ENTRY provides the standard procedure entry code and an easy way to
* insert the calls to mcount for profiling. ENTRY_NP is identical, but
* never calls mcount.
*/
#define ENTRY(x) \
.text; \
.align ASM_ENTRY_ALIGN; \
.globl x; \
x: MCOUNT(x)
#define ENTRY_NP(x) \
.text; \
.align ASM_ENTRY_ALIGN; \
.globl x; \
x:
#define RTENTRY(x) \
.text; \
.align ASM_ENTRY_ALIGN; \
.globl x; \
x: RTMCOUNT(x)
/*
* ENTRY2 is identical to ENTRY but provides two labels for the entry point.
*/
#define ENTRY2(x, y) \
.text; \
.align ASM_ENTRY_ALIGN; \
.globl x, y; \
/* CSTYLED */ \
x: ; \
y: MCOUNT(x)
#define ENTRY_NP2(x, y) \
.text; \
.align ASM_ENTRY_ALIGN; \
.globl x, y; \
/* CSTYLED */ \
x: ; \
y:
/*
* ALTENTRY provides for additional entry points.
*/
#define ALTENTRY(x) \
.globl x; \
x:
/*
* DGDEF and DGDEF2 provide global data declarations.
*
* DGDEF provides a word aligned word of storage.
*
* DGDEF2 allocates "sz" bytes of storage with **NO** alignment. This
* implies this macro is best used for byte arrays.
*
* DGDEF3 allocates "sz" bytes of storage with "algn" alignment.
*/
.data; \
name:
.data; \
name:
/*
* SET_SIZE trails a function and set the size for the ELF symbol table.
*/
#define SET_SIZE(x) \
.size x, [.-x]
/*
* NWORD provides native word value.
*/
#if defined(__amd64)
/*CSTYLED*/
#define NWORD long
#endif /* __i386 */
#endif /* _ASM */
#ifdef __cplusplus
}
#endif
#endif /* _IA32_SYS_ASM_LINKAGE_H */