1199767f8SToomas Soome /*- 2199767f8SToomas Soome * Copyright (c) 1999 John D. Polstra 3199767f8SToomas Soome * Copyright (c) 1999,2001 Peter Wemm <peter@FreeBSD.org> 4199767f8SToomas Soome * All rights reserved. 5199767f8SToomas Soome * 6199767f8SToomas Soome * Redistribution and use in source and binary forms, with or without 7199767f8SToomas Soome * modification, are permitted provided that the following conditions 8199767f8SToomas Soome * are met: 9199767f8SToomas Soome * 1. Redistributions of source code must retain the above copyright 10199767f8SToomas Soome * notice, this list of conditions and the following disclaimer. 11199767f8SToomas Soome * 2. Redistributions in binary form must reproduce the above copyright 12199767f8SToomas Soome * notice, this list of conditions and the following disclaimer in the 13199767f8SToomas Soome * documentation and/or other materials provided with the distribution. 14199767f8SToomas Soome * 15199767f8SToomas Soome * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16199767f8SToomas Soome * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17199767f8SToomas Soome * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18199767f8SToomas Soome * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19199767f8SToomas Soome * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20199767f8SToomas Soome * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21199767f8SToomas Soome * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22199767f8SToomas Soome * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23199767f8SToomas Soome * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24199767f8SToomas Soome * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25199767f8SToomas Soome * SUCH DAMAGE. 26199767f8SToomas Soome * 27199767f8SToomas Soome * $FreeBSD$ 28199767f8SToomas Soome */ 29199767f8SToomas Soome 30199767f8SToomas Soome #ifndef _SYS_LINKER_SET_H_ 31199767f8SToomas Soome #define _SYS_LINKER_SET_H_ 32199767f8SToomas Soome 33199767f8SToomas Soome #ifndef _SYS_CDEFS_H_ 34199767f8SToomas Soome #error this file needs sys/cdefs.h as a prerequisite 35199767f8SToomas Soome #endif 36199767f8SToomas Soome 37199767f8SToomas Soome /* 38199767f8SToomas Soome * The following macros are used to declare global sets of objects, which 39199767f8SToomas Soome * are collected by the linker into a `linker_set' as defined below. 40199767f8SToomas Soome * For ELF, this is done by constructing a separate segment for each set. 41199767f8SToomas Soome */ 42199767f8SToomas Soome 43199767f8SToomas Soome #if defined(__powerpc64__) 44199767f8SToomas Soome /* 45199767f8SToomas Soome * Move the symbol pointer from ".text" to ".data" segment, to make 46199767f8SToomas Soome * the GCC compiler happy: 47199767f8SToomas Soome */ 48199767f8SToomas Soome #define __MAKE_SET_CONST 49199767f8SToomas Soome #else 50199767f8SToomas Soome #define __MAKE_SET_CONST const 51199767f8SToomas Soome #endif 52199767f8SToomas Soome 53199767f8SToomas Soome /* 54199767f8SToomas Soome * Private macros, not to be used outside this header file. 55199767f8SToomas Soome */ 56199767f8SToomas Soome #ifdef __GNUCLIKE___SECTION 57199767f8SToomas Soome #define __MAKE_SET(set, sym) \ 58*d56b5f9fSToomas Soome __WEAK(__CONCAT(__start_set_,set)); \ 59*d56b5f9fSToomas Soome __WEAK(__CONCAT(__stop_set_,set)); \ 60199767f8SToomas Soome static void const * __MAKE_SET_CONST \ 61199767f8SToomas Soome __set_##set##_sym_##sym __section("set_" #set) \ 62199767f8SToomas Soome __used = &(sym) 63199767f8SToomas Soome #else /* !__GNUCLIKE___SECTION */ 64199767f8SToomas Soome #ifndef lint 65199767f8SToomas Soome #error this file needs to be ported to your compiler 66199767f8SToomas Soome #endif /* lint */ 67199767f8SToomas Soome #define __MAKE_SET(set, sym) extern void const * const (__set_##set##_sym_##sym) 68199767f8SToomas Soome #endif /* __GNUCLIKE___SECTION */ 69199767f8SToomas Soome 70199767f8SToomas Soome /* 71199767f8SToomas Soome * Public macros. 72199767f8SToomas Soome */ 73199767f8SToomas Soome #define TEXT_SET(set, sym) __MAKE_SET(set, sym) 74199767f8SToomas Soome #define DATA_SET(set, sym) __MAKE_SET(set, sym) 75199767f8SToomas Soome #define BSS_SET(set, sym) __MAKE_SET(set, sym) 76199767f8SToomas Soome #define ABS_SET(set, sym) __MAKE_SET(set, sym) 77199767f8SToomas Soome #define SET_ENTRY(set, sym) __MAKE_SET(set, sym) 78199767f8SToomas Soome 79199767f8SToomas Soome /* 80199767f8SToomas Soome * Initialize before referring to a given linker set. 81199767f8SToomas Soome */ 82199767f8SToomas Soome #define SET_DECLARE(set, ptype) \ 83199767f8SToomas Soome extern ptype __weak_symbol *__CONCAT(__start_set_,set); \ 84199767f8SToomas Soome extern ptype __weak_symbol *__CONCAT(__stop_set_,set) 85199767f8SToomas Soome 86199767f8SToomas Soome #define SET_BEGIN(set) \ 87199767f8SToomas Soome (&__CONCAT(__start_set_,set)) 88199767f8SToomas Soome #define SET_LIMIT(set) \ 89199767f8SToomas Soome (&__CONCAT(__stop_set_,set)) 90199767f8SToomas Soome 91199767f8SToomas Soome /* 92199767f8SToomas Soome * Iterate over all the elements of a set. 93199767f8SToomas Soome * 94199767f8SToomas Soome * Sets always contain addresses of things, and "pvar" points to words 95199767f8SToomas Soome * containing those addresses. Thus is must be declared as "type **pvar", 96199767f8SToomas Soome * and the address of each set item is obtained inside the loop by "*pvar". 97199767f8SToomas Soome */ 98199767f8SToomas Soome #define SET_FOREACH(pvar, set) \ 99199767f8SToomas Soome for (pvar = SET_BEGIN(set); pvar < SET_LIMIT(set); pvar++) 100199767f8SToomas Soome 101199767f8SToomas Soome #define SET_ITEM(set, i) \ 102199767f8SToomas Soome ((SET_BEGIN(set))[i]) 103199767f8SToomas Soome 104199767f8SToomas Soome /* 105199767f8SToomas Soome * Provide a count of the items in a set. 106199767f8SToomas Soome */ 107199767f8SToomas Soome #define SET_COUNT(set) \ 108199767f8SToomas Soome (SET_LIMIT(set) - SET_BEGIN(set)) 109199767f8SToomas Soome 110199767f8SToomas Soome #endif /* _SYS_LINKER_SET_H_ */ 111