cdefs_elf.h

/*  $NetBSD: cdefs_elf.h,v 1.24 2005/07/16 17:53:36 christos Exp $  */
 
/*
 * Copyright (c) 1995, 1996 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Chris G. Demetriou
 *
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */
 
#ifndef _SYS_CDEFS_ELF_H_
#define _SYS_CDEFS_ELF_H_
 
#ifdef __LEADING_UNDERSCORE
#define _C_LABEL(x) __CONCAT(_,x)
#define _C_LABEL_STRING(x)  "_"x
#else
#define _C_LABEL(x) x
#define _C_LABEL_STRING(x)  x
#endif
 
#if __STDC__
#define ___RENAME(x)    __asm__(___STRING(_C_LABEL(x)))
#else
#ifdef __LEADING_UNDERSCORE
#define ___RENAME(x)    ____RENAME(_x)
#define ____RENAME(x)   __asm__(___STRING(x))
#else
#define ___RENAME(x)    __asm__(___STRING(x))
#endif
#endif
 
#define __indr_reference(sym,alias) /* nada, since we do weak refs */
 
#if __STDC__
#define __strong_alias(alias,sym)                       \
    __asm__(".global " _C_LABEL_STRING(#alias) "\n"         \
        _C_LABEL_STRING(#alias) " = " _C_LABEL_STRING(#sym));
 
#define __weak_alias(alias,sym)                     \
    __asm__(".weak " _C_LABEL_STRING(#alias) "\n"           \
        _C_LABEL_STRING(#alias) " = " _C_LABEL_STRING(#sym));
#define __weak_extern(sym)                      \
    __asm__(".weak " _C_LABEL_STRING(#sym));
#define __warn_references(sym,msg)                  \
    __asm__(".section .gnu.warning." #sym "\n\t.ascii \"" msg "\"\n\t.text");
 
#else /* !__STDC__ */
 
#ifdef __LEADING_UNDERSCORE
#define __weak_alias(alias,sym) ___weak_alias(_alias,_sym)
#define ___weak_alias(alias,sym)                    \
    __asm__(".weak alias\nalias = sym");
#else
#define __weak_alias(alias,sym)                     \
    __asm__(".weak alias\nalias = sym");
#endif
#ifdef __LEADING_UNDERSCORE
#define __weak_extern(sym) ___weak_extern(_sym)
#define ___weak_extern(sym)                     \
    __asm__(".weak sym");
#else
#define __weak_extern(sym)                      \
    __asm__(".weak sym");
#endif
#define __warn_references(sym,msg)                  \
    __asm__(".section .gnu.warning.sym\n\t.ascii msg ; .text");
 
#endif /* !__STDC__ */
 
#if __STDC__
#define __SECTIONSTRING(_sec, _str)                 \
    __asm__(".section " #_sec "\n\t.asciz \"" _str "\"\n\t.previous")
#else
#define __SECTIONSTRING(_sec, _str)                 \
    __asm__(".section _sec\n\t.asciz _str\n\t.previous")
#endif
 
#define __IDSTRING(_n,_s)       __SECTIONSTRING(.ident,_s)
 
#define __RCSID(_s)         __IDSTRING(rcsid,_s)
#define __SCCSID(_s)
#define __SCCSID2(_s)
#if 0   /* XXX userland __COPYRIGHTs have \ns in them */
#define __COPYRIGHT(_s)         __SECTIONSTRING(.copyright,_s)
#else
#define __COPYRIGHT(_s)                         \
    static const char copyright[]                   \
        __attribute__((__unused__,__section__(".copyright"))) = _s
#endif
 
#define __KERNEL_RCSID(_n, _s)      __RCSID(_s)
#define __KERNEL_SCCSID(_n, _s)
#if 0   /* XXX see above */
#define __KERNEL_COPYRIGHT(_n, _s)  __COPYRIGHT(_s)
#else
#define __KERNEL_COPYRIGHT(_n, _s)  __SECTIONSTRING(.copyright, _s)
#endif
 
#ifndef __lint__
#define __link_set_make_entry(set, sym)                 \
    static void const * const __link_set_##set##_sym_##sym      \
        __section("link_set_" #set) __used = &sym
#define __link_set_make_entry2(set, sym, n)             \
    static void const * const __link_set_##set##_sym_##sym##_##n    \
        __section("link_set_" #set) __used = &sym[n]
#else
#define __link_set_make_entry(set, sym)                 \
    extern void const * const __link_set_##set##_sym_##sym
#define __link_set_make_entry2(set, sym, n)             \
    extern void const * const __link_set_##set##_sym_##sym##_##n
#endif /* __lint__ */
 
#define __link_set_add_text(set, sym)   __link_set_make_entry(set, sym)
#define __link_set_add_rodata(set, sym) __link_set_make_entry(set, sym)
#define __link_set_add_data(set, sym)   __link_set_make_entry(set, sym)
#define __link_set_add_bss(set, sym)    __link_set_make_entry(set, sym)
#define __link_set_add_text2(set, sym, n)   __link_set_make_entry2(set, sym, n)
#define __link_set_add_rodata2(set, sym, n) __link_set_make_entry2(set, sym, n)
#define __link_set_add_data2(set, sym, n)   __link_set_make_entry2(set, sym, n)
#define __link_set_add_bss2(set, sym, n)    __link_set_make_entry2(set, sym, n)
 
#define __link_set_decl(set, ptype)                 \
    extern ptype * const __start_link_set_##set[];          \
    extern ptype * const __stop_link_set_##set[]            \
 
#define __link_set_start(set)   (__start_link_set_##set)
#define __link_set_end(set) (__stop_link_set_##set)
 
#define __link_set_count(set)                       \
    (__link_set_end(set) - __link_set_start(set))
 
#endif /* !_SYS_CDEFS_ELF_H_ */