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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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
* or http://www.opensolaris.org/os/licensing.
* 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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_ASM_LINKAGE_H
#define _SYS_ASM_LINKAGE_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/stack.h>
#include <sys/trap.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _ASM /* The remainder of this file is only for assembly files */
/*
* C pointers are different sizes between V8 and V9.
* These constants can be used to compute offsets into pointer arrays.
*/
#ifdef __sparcv9
#define CPTRSHIFT 3
#define CLONGSHIFT 3
#else
#define CPTRSHIFT 2
#define CLONGSHIFT 2
#endif
#define CPTRSIZE (1<<CPTRSHIFT)
#define CLONGSIZE (1<<CLONGSHIFT)
#define CPTRMASK (CPTRSIZE - 1)
#define CLONGMASK (CLONGSIZE - 1)
/*
* Symbolic section definitions.
*/
#define RODATA ".rodata"
/*
* profiling causes defintions of the MCOUNT and RTMCOUNT
* particular to the type
*/
#ifdef GPROF
#define MCOUNT_SIZE (4*4) /* 4 instructions */
#define MCOUNT(x) \
save %sp, -SA(MINFRAME), %sp; \
call _mcount; \
nop; \
restore;
#endif /* GPROF */
#ifdef PROF
#if defined(__sparcv9)
#define MCOUNT_SIZE (9*4) /* 9 instructions */
#define MCOUNT(x) \
save %sp, -SA(MINFRAME), %sp; \
/* CSTYLED */ \
sethi %hh(.L_/**/x/**/1), %o0; \
/* CSTYLED */ \
sethi %lm(.L_/**/x/**/1), %o1; \
/* CSTYLED */ \
or %o0, %hm(.L_/**/x/**/1), %o0; \
/* CSTYLED */ \
or %o1, %lo(.L_/**/x/**/1), %o1; \
sllx %o0, 32, %o0; \
call _mcount; \
or %o0, %o1, %o0; \
restore; \
/* CSTYLED */ \
.common .L_/**/x/**/1, 8, 8
#else /* __sparcv9 */
#define MCOUNT_SIZE (5*4) /* 5 instructions */
#define MCOUNT(x) \
save %sp, -SA(MINFRAME), %sp; \
/* CSTYLED */ \
sethi %hi(.L_/**/x/**/1), %o0; \
call _mcount; \
/* CSTYLED */ \
or %o0, %lo(.L_/**/x/**/1), %o0; \
restore; \
/* CSTYLED */ \
.common .L_/**/x/**/1, 4, 4
#endif /* __sparcv9 */
#endif /* PROF */
/*
* if we are not profiling, MCOUNT should be defined to nothing
*/
#if !defined(PROF) && !defined(GPROF)
#define MCOUNT_SIZE 0 /* no instructions inserted */
#define MCOUNT(x)
#endif /* !defined(PROF) && !defined(GPROF) */
#define RTMCOUNT(x) MCOUNT(x)
/*
* 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,...)
*/
#define ANSI_PRAGMA_WEAK(sym, stype) \
/* CSTYLED */ \
.weak _/**/sym; \
/* CSTYLED */ \
.type _/**/sym, #stype; \
/* CSTYLED */ \
_/**/sym = sym
/*
* Like ANSI_PRAGMA_WEAK(), but for unrelated names, as in:
* #pragma weak sym1 = sym2
*/
#define ANSI_PRAGMA_WEAK2(sym1, sym2, stype) \
.weak sym1; \
.type sym1, #stype; \
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) \
.section ".text"; \
.align 4; \
.global x; \
.type x, #function; \
x: MCOUNT(x)
#define ENTRY_SIZE MCOUNT_SIZE
#define ENTRY_NP(x) \
.section ".text"; \
.align 4; \
.global x; \
.type x, #function; \
x:
#define RTENTRY(x) \
.section ".text"; \
.align 4; \
.global x; \
.type x, #function; \
x: RTMCOUNT(x)
/*
* ENTRY2 is identical to ENTRY but provides two labels for the entry point.
*/
#define ENTRY2(x, y) \
.section ".text"; \
.align 4; \
.global x, y; \
.type x, #function; \
.type y, #function; \
/* CSTYLED */ \
x: ; \
y: MCOUNT(x)
#define ENTRY_NP2(x, y) \
.section ".text"; \
.align 4; \
.global x, y; \
.type x, #function; \
.type y, #function; \
/* CSTYLED */ \
x: ; \
y:
/*
* ALTENTRY provides for additional entry points.
*/
#define ALTENTRY(x) \
.global x; \
.type x, #function; \
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.
*/
#define DGDEF2(name, sz) \
.section ".data"; \
.global name; \
.type name, #object; \
.size name, sz; \
name:
#define DGDEF3(name, sz, algn) \
.section ".data"; \
.align algn; \
.global name; \
.type name, #object; \
.size name, sz; \
name:
#define DGDEF(name) DGDEF3(name, 4, 4)
/*
* SET_SIZE trails a function and set the size for the ELF symbol table.
*/
#define SET_SIZE(x) \
.size x, (.-x)
#endif /* _ASM */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_ASM_LINKAGE_H */
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