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- /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
- /*-
- * Copyright (c) 1999 John D. Polstra
- * All rights reserved.
- *
- * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 _SYS_LINKER_SET_H_
- #define _SYS_LINKER_SET_H_
-
- /*
- * The following macros are used to declare global sets of objects, which
- * are collected by the linker into a `struct linker_set' as defined below.
- * For ELF, this is done by constructing a separate segment for each set.
- * For a.out, it is done automatically by the linker.
- */
-
- #define __ELF__
- #ifdef __ELF__
-
- #define MAKE_SET(seg, set, sym) \
- static void const * const __set_##set##_sym_##sym = &sym; \
- __asm(".section seg, " #set ""); \
- __asm(".long " #sym);
-
- /* __asm(".previous") */
-
-
- #define TEXT_SET(set, sym) MAKE_SET(__TEXT, set, sym)
- #define DATA_SET(set, sym) MAKE_SET(__DATA, set, sym)
- #define BSS_SET(set, sym) MAKE_SET(__BSS, set, sym)
- #define ABS_SET(set, sym) MAKE_SET(__ABS, set, sym)
-
- #else
-
- /*
- * NB: the constants defined below must match those defined in
- * nlist.h. Since their calculation requires arithmetic, we
- * can't name them symbolically (e.g., 7 is N_DATA | N_EXT).
- */
- #define MAKE_SET(set, sym, type) \
- static void const * const __set_##set##_sym_##sym = &sym; \
- __asm(".stabs \"_" #set "\", " #type ", 0, 0, _" #sym)
-
- #define TEXT_SET(set, sym) MAKE_SET(set, sym, 5)
- #define DATA_SET(set, sym) MAKE_SET(set, sym, 7)
- #define BSS_SET(set, sym) MAKE_SET(set, sym, 9)
- #define ABS_SET(set, sym) MAKE_SET(set, sym, 3)
-
- #endif
-
- struct linker_set {
- int ls_length;
- const void *ls_items[1]; /* really ls_length of them,
- * trailing NULL */
- };
-
- #endif /* _SYS_LINKER_SET_H_ */
-
-