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211 lines
7.1 KiB
211 lines
7.1 KiB
/* Configuration definitions.
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Copyright (C) 2008, 2009 Red Hat, Inc.
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This file is part of elfutils.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifndef EU_CONFIG_H
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#define EU_CONFIG_H 1
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#ifdef USE_LOCKS
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# include <pthread.h>
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# include <assert.h>
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# define rwlock_define(class,name) class pthread_rwlock_t name
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# define RWLOCK_CALL(call) \
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({ int _err = pthread_rwlock_ ## call; assert_perror (_err); })
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# define rwlock_init(lock) RWLOCK_CALL (init (&lock, NULL))
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# define rwlock_fini(lock) RWLOCK_CALL (destroy (&lock))
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# define rwlock_rdlock(lock) RWLOCK_CALL (rdlock (&lock))
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# define rwlock_wrlock(lock) RWLOCK_CALL (wrlock (&lock))
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# define rwlock_unlock(lock) RWLOCK_CALL (unlock (&lock))
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#else
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/* Eventually we will allow multi-threaded applications to use the
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libraries. Therefore we will add the necessary locking although
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the macros used expand to nothing for now. */
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# define rwlock_define(class,name) class int name
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# define rwlock_init(lock) ((void) (lock))
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# define rwlock_fini(lock) ((void) (lock))
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# define rwlock_rdlock(lock) ((void) (lock))
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# define rwlock_wrlock(lock) ((void) (lock))
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# define rwlock_unlock(lock) ((void) (lock))
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#endif /* USE_LOCKS */
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/* gettext helper macros. */
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#define N_(Str) Str
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#define _(Str) dgettext ("elfutils", Str)
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/* Compiler-specific definitions. */
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#define strong_alias(name, aliasname) \
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extern __typeof (name) aliasname __attribute__ ((alias (#name)));
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#ifdef __i386__
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# define internal_function __attribute__ ((regparm (3), stdcall))
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#else
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# define internal_function /* nothing */
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#endif
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#define internal_strong_alias(name, aliasname) \
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extern __typeof (name) aliasname __attribute__ ((alias (#name))) internal_function;
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#ifdef HAVE_VISIBILITY
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#define attribute_hidden \
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__attribute__ ((visibility ("hidden")))
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#else
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#define attribute_hidden /* empty */
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#endif
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#ifdef HAVE_GCC_STRUCT
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#define attribute_packed \
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__attribute__ ((packed, gcc_struct))
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#else
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#define attribute_packed \
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__attribute__ ((packed))
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#endif
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/* Define ALLOW_UNALIGNED if the architecture allows operations on
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unaligned memory locations. */
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#define SANITIZE_UNDEFINED 1
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#if (defined __i386__ || defined __x86_64__) && ! CHECK_UNDEFINED
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# define ALLOW_UNALIGNED 1
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#else
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# define ALLOW_UNALIGNED 0
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#endif
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#if DEBUGPRED
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# ifdef __x86_64__
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asm (".section predict_data, \"aw\"; .previous\n"
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".section predict_line, \"a\"; .previous\n"
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".section predict_file, \"a\"; .previous");
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# ifndef PIC
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# define debugpred__(e, E) \
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({ long int _e = !!(e); \
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asm volatile (".pushsection predict_data; ..predictcnt%=: .quad 0; .quad 0\n" \
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".section predict_line; .quad %c1\n" \
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".section predict_file; .quad %c2; .popsection\n" \
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"addq $1,..predictcnt%=(,%0,8)" \
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: : "r" (_e == E), "i" (__LINE__), "i" (__FILE__)); \
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__builtin_expect (_e, E); \
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})
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# endif
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# elif defined __i386__
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asm (".section predict_data, \"aw\"; .previous\n"
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".section predict_line, \"a\"; .previous\n"
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".section predict_file, \"a\"; .previous");
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# ifndef PIC
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# define debugpred__(e, E) \
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({ long int _e = !!(e); \
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asm volatile (".pushsection predict_data; ..predictcnt%=: .long 0; .long 0\n" \
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".section predict_line; .long %c1\n" \
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".section predict_file; .long %c2; .popsection\n" \
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"incl ..predictcnt%=(,%0,8)" \
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: : "r" (_e == E), "i" (__LINE__), "i" (__FILE__)); \
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__builtin_expect (_e, E); \
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})
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# endif
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# endif
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# ifdef debugpred__
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# define unlikely(e) debugpred__ (e,0)
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# define likely(e) debugpred__ (e,1)
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# endif
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#endif
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#ifndef likely
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# define unlikely(expr) __builtin_expect (!!(expr), 0)
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# define likely(expr) __builtin_expect (!!(expr), 1)
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#endif
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#define obstack_calloc(ob, size) \
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({ size_t _s = (size); memset (obstack_alloc (ob, _s), '\0', _s); })
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#define obstack_strdup(ob, str) \
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({ const char *_s = (str); obstack_copy0 (ob, _s, strlen (_s)); })
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#define obstack_strndup(ob, str, n) \
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({ const char *_s = (str); obstack_copy0 (ob, _s, strnlen (_s, n)); })
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#if __STDC_VERSION__ >= 199901L
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# define flexarr_size /* empty */
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#else
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# define flexarr_size 0
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#endif
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/* Calling conventions. */
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#ifdef __i386__
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# define CALLING_CONVENTION regparm (3), stdcall
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# define AND_CALLING_CONVENTION , regparm (3), stdcall
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#else
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# define CALLING_CONVENTION
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# define AND_CALLING_CONVENTION
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#endif
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/* Avoid PLT entries. */
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#ifdef PIC
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# define INTUSE(name) _INTUSE(name)
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# define _INTUSE(name) __##name##_internal
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# define INTDEF(name) _INTDEF(name)
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# define _INTDEF(name) \
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extern __typeof__ (name) __##name##_internal __attribute__ ((alias (#name)));
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# define INTDECL(name) _INTDECL(name)
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# define _INTDECL(name) \
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extern __typeof__ (name) __##name##_internal attribute_hidden;
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#else
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# define INTUSE(name) name
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# define INTDEF(name) /* empty */
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# define INTDECL(name) /* empty */
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#endif
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/* This macro is used by the tests conditionalize for standalone building. */
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#define ELFUTILS_HEADER(name) <lib##name.h>
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#ifdef SYMBOL_VERSIONING
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# define OLD_VERSION(name, version) \
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asm (".globl _compat." #version "." #name "\n" \
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"_compat." #version "." #name " = " #name "\n" \
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".symver _compat." #version "." #name "," #name "@" #version);
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# define NEW_VERSION(name, version) \
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asm (".symver " #name "," #name "@@@" #version);
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# define COMPAT_VERSION_NEWPROTO(name, version, prefix) \
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asm (".symver _compat." #version "." #name "," #name "@" #version); \
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__typeof (_compat_##prefix##_##name) _compat_##prefix##_##name \
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asm ("_compat." #version "." #name);
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# define COMPAT_VERSION(name, version, prefix) \
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asm (".symver _compat." #version "." #name "," #name "@" #version); \
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__typeof (name) _compat_##prefix##_##name asm ("_compat." #version "." #name);
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#else
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# define OLD_VERSION(name, version) /* Nothing for static linking. */
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# define NEW_VERSION(name, version) /* Nothing for static linking. */
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# define COMPAT_VERSION_NEWPROTO(name, version, prefix) \
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error "should use #ifdef SYMBOL_VERSIONING"
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# define COMPAT_VERSION(name, version, prefix) error "should use #ifdef SYMBOL_VERSIONING"
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#endif
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#ifndef FALLTHROUGH
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# ifdef HAVE_FALLTHROUGH
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# define FALLTHROUGH __attribute__ ((fallthrough))
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# else
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# define FALLTHROUGH ((void) 0)
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# endif
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#endif
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#endif /* eu-config.h */
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