The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/sys/linker_set.h

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 1999 John D. Polstra
    5  * Copyright (c) 1999,2001 Peter Wemm <peter@FreeBSD.org>
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  * $FreeBSD: releng/12.0/sys/sys/linker_set.h 331290 2018-03-21 10:26:39Z kib $
   30  */
   31 
   32 #ifndef _SYS_LINKER_SET_H_
   33 #define _SYS_LINKER_SET_H_
   34 
   35 #ifndef _SYS_CDEFS_H_
   36 #error this file needs sys/cdefs.h as a prerequisite
   37 #endif
   38 
   39 /*
   40  * The following macros are used to declare global sets of objects, which
   41  * are collected by the linker into a `linker_set' as defined below.
   42  * For ELF, this is done by constructing a separate segment for each set.
   43  */
   44 
   45 #if defined(__powerpc64__)
   46 /*
   47  * Move the symbol pointer from ".text" to ".data" segment, to make
   48  * the GCC compiler happy:
   49  */
   50 #define __MAKE_SET_CONST
   51 #else
   52 #define __MAKE_SET_CONST const
   53 #endif
   54 
   55 /*
   56  * Private macros, not to be used outside this header file.
   57  */
   58 #ifdef __GNUCLIKE___SECTION
   59 #define __MAKE_SET_QV(set, sym, qv)                     \
   60         __GLOBL(__CONCAT(__start_set_,set));            \
   61         __GLOBL(__CONCAT(__stop_set_,set));             \
   62         static void const * qv                          \
   63         __set_##set##_sym_##sym __section("set_" #set)  \
   64         __used = &(sym)
   65 #define __MAKE_SET(set, sym)    __MAKE_SET_QV(set, sym, __MAKE_SET_CONST)
   66 #else /* !__GNUCLIKE___SECTION */
   67 #error this file needs to be ported to your compiler
   68 #endif /* __GNUCLIKE___SECTION */
   69 
   70 /*
   71  * Public macros.
   72  */
   73 #define TEXT_SET(set, sym)      __MAKE_SET(set, sym)
   74 #define DATA_SET(set, sym)      __MAKE_SET(set, sym)
   75 #define DATA_WSET(set, sym)     __MAKE_SET_QV(set, sym, )
   76 #define BSS_SET(set, sym)       __MAKE_SET(set, sym)
   77 #define ABS_SET(set, sym)       __MAKE_SET(set, sym)
   78 #define SET_ENTRY(set, sym)     __MAKE_SET(set, sym)
   79 
   80 /*
   81  * Initialize before referring to a given linker set.
   82  */
   83 #define SET_DECLARE(set, ptype)                                 \
   84         extern ptype __weak_symbol *__CONCAT(__start_set_,set); \
   85         extern ptype __weak_symbol *__CONCAT(__stop_set_,set)
   86 
   87 #define SET_BEGIN(set)                                                  \
   88         (&__CONCAT(__start_set_,set))
   89 #define SET_LIMIT(set)                                                  \
   90         (&__CONCAT(__stop_set_,set))
   91 
   92 /*
   93  * Iterate over all the elements of a set.
   94  *
   95  * Sets always contain addresses of things, and "pvar" points to words
   96  * containing those addresses.  Thus is must be declared as "type **pvar",
   97  * and the address of each set item is obtained inside the loop by "*pvar".
   98  */
   99 #define SET_FOREACH(pvar, set)                                          \
  100         for (pvar = SET_BEGIN(set); pvar < SET_LIMIT(set); pvar++)
  101 
  102 #define SET_ITEM(set, i)                                                \
  103         ((SET_BEGIN(set))[i])
  104 
  105 /*
  106  * Provide a count of the items in a set.
  107  */
  108 #define SET_COUNT(set)                                                  \
  109         (SET_LIMIT(set) - SET_BEGIN(set))
  110 
  111 #endif  /* _SYS_LINKER_SET_H_ */

Cache object: 70ff82dea28c199f326c18bafdb589f4


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.