2 * Copyright (c) 1999 John D. Polstra
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sys/sys/linker_set.h,v 1.4.2.1 2000/08/02 21:52:20 peter Exp $
27 * $DragonFly: src/sys/sys/linker_set.h,v 1.2 2003/06/17 04:28:58 dillon Exp $
30 #ifndef _SYS_LINKER_SET_H_
31 #define _SYS_LINKER_SET_H_
34 * The following macros are used to declare global sets of objects, which
35 * are collected by the linker into a `struct linker_set' as defined below.
36 * For ELF, this is done by constructing a separate segment for each set.
37 * For a.out, it is done automatically by the linker.
39 * In the MAKE_SET macros below, the lines:
41 * static void const * const __set_##set##_sym_##sym = &sym;
43 * are present only to prevent the compiler from producing bogus
44 * warnings about unused symbols.
49 * Alpha GAS needs an align before the section change. It seems to assume
50 * that after the .previous, it is aligned, so the following .align 3 is
51 * ignored. Since the previous instructions often contain strings, this is
56 #define MAKE_SET(set, sym) \
57 static void const * const __set_##set##_sym_##sym = &sym; \
59 __asm(".section .set." #set ",\"aw\""); \
60 __asm(".quad " #sym); \
63 #define MAKE_SET(set, sym) \
64 static void const * const __set_##set##_sym_##sym = &sym; \
65 __asm(".section .set." #set ",\"aw\""); \
66 __asm(".long " #sym); \
69 #define TEXT_SET(set, sym) MAKE_SET(set, sym)
70 #define DATA_SET(set, sym) MAKE_SET(set, sym)
75 * NB: the constants defined below must match those defined in
76 * ld/ld.h. Since their calculation requires arithmetic, we
77 * can't name them symbolically (e.g., 23 is N_SETT | N_EXT).
79 #define MAKE_SET(set, sym, type) \
80 static void const * const __set_##set##_sym_##sym = &sym; \
81 __asm(".stabs \"_" #set "\", " #type ", 0, 0, _" #sym)
82 #define TEXT_SET(set, sym) MAKE_SET(set, sym, 23)
83 #define DATA_SET(set, sym) MAKE_SET(set, sym, 25)
89 void *ls_items[1]; /* really ls_length of them,
93 #endif /* _SYS_LINKER_SET_H_ */