1*90ce8b93SToomas Soome /* 2*90ce8b93SToomas Soome * Copyright (c) 1999 John D. Polstra 3*90ce8b93SToomas Soome * Copyright (c) 1999,2001 Peter Wemm <peter@FreeBSD.org> 4*90ce8b93SToomas Soome * All rights reserved. 5*90ce8b93SToomas Soome * 6*90ce8b93SToomas Soome * Redistribution and use in source and binary forms, with or without 7*90ce8b93SToomas Soome * modification, are permitted provided that the following conditions 8*90ce8b93SToomas Soome * are met: 9*90ce8b93SToomas Soome * 1. Redistributions of source code must retain the above copyright 10*90ce8b93SToomas Soome * notice, this list of conditions and the following disclaimer. 11*90ce8b93SToomas Soome * 2. Redistributions in binary form must reproduce the above copyright 12*90ce8b93SToomas Soome * notice, this list of conditions and the following disclaimer in the 13*90ce8b93SToomas Soome * documentation and/or other materials provided with the distribution. 14*90ce8b93SToomas Soome * 15*90ce8b93SToomas Soome * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16*90ce8b93SToomas Soome * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17*90ce8b93SToomas Soome * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18*90ce8b93SToomas Soome * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19*90ce8b93SToomas Soome * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20*90ce8b93SToomas Soome * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21*90ce8b93SToomas Soome * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22*90ce8b93SToomas Soome * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23*90ce8b93SToomas Soome * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24*90ce8b93SToomas Soome * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25*90ce8b93SToomas Soome * SUCH DAMAGE. 26*90ce8b93SToomas Soome */ 27*90ce8b93SToomas Soome 28*90ce8b93SToomas Soome #ifndef _SYS_LINKER_SET_H_ 29*90ce8b93SToomas Soome #define _SYS_LINKER_SET_H_ 30*90ce8b93SToomas Soome 31*90ce8b93SToomas Soome #include <sys/ccompile.h> 32*90ce8b93SToomas Soome 33*90ce8b93SToomas Soome /* 34*90ce8b93SToomas Soome * The following macros are used to declare global sets of objects, which 35*90ce8b93SToomas Soome * are collected by the linker into a `linker_set' as defined below. 36*90ce8b93SToomas Soome * For ELF, this is done by constructing a separate segment for each set. 37*90ce8b93SToomas Soome */ 38*90ce8b93SToomas Soome 39*90ce8b93SToomas Soome #define __MAKE_SET_CONST const 40*90ce8b93SToomas Soome 41*90ce8b93SToomas Soome #define __CONCAT1(x, y) x ## y 42*90ce8b93SToomas Soome #define __CONCAT(x, y) __CONCAT1(x, y) 43*90ce8b93SToomas Soome 44*90ce8b93SToomas Soome #define __GLOBL1(sym) __asm__(".globl " #sym) 45*90ce8b93SToomas Soome #define __GLOBL(sym) __GLOBL1(sym) 46*90ce8b93SToomas Soome /* 47*90ce8b93SToomas Soome * Private macros, not to be used outside this header file. 48*90ce8b93SToomas Soome */ 49*90ce8b93SToomas Soome #define __MAKE_SET(set, sym) \ 50*90ce8b93SToomas Soome __GLOBL(__CONCAT(__start_set_, set)); \ 51*90ce8b93SToomas Soome __GLOBL(__CONCAT(__stop_set_, set)); \ 52*90ce8b93SToomas Soome static void const * __MAKE_SET_CONST \ 53*90ce8b93SToomas Soome __set_##set##_sym_##sym __section("set_" #set) \ 54*90ce8b93SToomas Soome __used = &(sym) 55*90ce8b93SToomas Soome 56*90ce8b93SToomas Soome /* 57*90ce8b93SToomas Soome * Public macros. 58*90ce8b93SToomas Soome */ 59*90ce8b93SToomas Soome #define TEXT_SET(set, sym) __MAKE_SET(set, sym) 60*90ce8b93SToomas Soome #define DATA_SET(set, sym) __MAKE_SET(set, sym) 61*90ce8b93SToomas Soome #define BSS_SET(set, sym) __MAKE_SET(set, sym) 62*90ce8b93SToomas Soome #define ABS_SET(set, sym) __MAKE_SET(set, sym) 63*90ce8b93SToomas Soome #define SET_ENTRY(set, sym) __MAKE_SET(set, sym) 64*90ce8b93SToomas Soome 65*90ce8b93SToomas Soome /* 66*90ce8b93SToomas Soome * Initialize before referring to a given linker set. 67*90ce8b93SToomas Soome */ 68*90ce8b93SToomas Soome #define SET_DECLARE(set, ptype) \ 69*90ce8b93SToomas Soome extern ptype __weak_symbol *__CONCAT(__start_set_, set); \ 70*90ce8b93SToomas Soome extern ptype __weak_symbol *__CONCAT(__stop_set_, set) 71*90ce8b93SToomas Soome 72*90ce8b93SToomas Soome #define SET_BEGIN(set) \ 73*90ce8b93SToomas Soome (&__CONCAT(__start_set_, set)) 74*90ce8b93SToomas Soome #define SET_LIMIT(set) \ 75*90ce8b93SToomas Soome (&__CONCAT(__stop_set_, set)) 76*90ce8b93SToomas Soome 77*90ce8b93SToomas Soome /* 78*90ce8b93SToomas Soome * Iterate over all the elements of a set. 79*90ce8b93SToomas Soome * 80*90ce8b93SToomas Soome * Sets always contain addresses of things, and "pvar" points to words 81*90ce8b93SToomas Soome * containing those addresses. Thus is must be declared as "type **pvar", 82*90ce8b93SToomas Soome * and the address of each set item is obtained inside the loop by "*pvar". 83*90ce8b93SToomas Soome */ 84*90ce8b93SToomas Soome #define SET_FOREACH(pvar, set) \ 85*90ce8b93SToomas Soome for (pvar = SET_BEGIN(set); pvar < SET_LIMIT(set); pvar++) 86*90ce8b93SToomas Soome 87*90ce8b93SToomas Soome #define SET_ITEM(set, i) \ 88*90ce8b93SToomas Soome ((SET_BEGIN(set))[i]) 89*90ce8b93SToomas Soome 90*90ce8b93SToomas Soome /* 91*90ce8b93SToomas Soome * Provide a count of the items in a set. 92*90ce8b93SToomas Soome */ 93*90ce8b93SToomas Soome #define SET_COUNT(set) \ 94*90ce8b93SToomas Soome (SET_LIMIT(set) - SET_BEGIN(set)) 95*90ce8b93SToomas Soome 96*90ce8b93SToomas Soome #endif /* _SYS_LINKER_SET_H_ */ 97