1 /* Configuration definitions. 2 Copyright (C) 2008, 2009 Red Hat, Inc. 3 This file is part of elfutils. 4 5 This file is free software; you can redistribute it and/or modify 6 it under the terms of either 7 8 * the GNU Lesser General Public License as published by the Free 9 Software Foundation; either version 3 of the License, or (at 10 your option) any later version 11 12 or 13 14 * the GNU General Public License as published by the Free 15 Software Foundation; either version 2 of the License, or (at 16 your option) any later version 17 18 or both in parallel, as here. 19 20 elfutils is distributed in the hope that it will be useful, but 21 WITHOUT ANY WARRANTY; without even the implied warranty of 22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 23 General Public License for more details. 24 25 You should have received copies of the GNU General Public License and 26 the GNU Lesser General Public License along with this program. If 27 not, see <http://www.gnu.org/licenses/>. */ 28 29 #ifndef EU_CONFIG_H 30 #define EU_CONFIG_H 1 31 32 #ifdef USE_LOCKS 33 # include <pthread.h> 34 # include <assert.h> 35 # define rwlock_define(class,name) class pthread_rwlock_t name 36 # define RWLOCK_CALL(call) \ 37 ({ int _err = pthread_rwlock_ ## call; assert_perror (_err); }) 38 # define rwlock_init(lock) RWLOCK_CALL (init (&lock, NULL)) 39 # define rwlock_fini(lock) RWLOCK_CALL (destroy (&lock)) 40 # define rwlock_rdlock(lock) RWLOCK_CALL (rdlock (&lock)) 41 # define rwlock_wrlock(lock) RWLOCK_CALL (wrlock (&lock)) 42 # define rwlock_unlock(lock) RWLOCK_CALL (unlock (&lock)) 43 #else 44 /* Eventually we will allow multi-threaded applications to use the 45 libraries. Therefore we will add the necessary locking although 46 the macros used expand to nothing for now. */ 47 # define rwlock_define(class,name) class int name 48 # define rwlock_init(lock) ((void) (lock)) 49 # define rwlock_fini(lock) ((void) (lock)) 50 # define rwlock_rdlock(lock) ((void) (lock)) 51 # define rwlock_wrlock(lock) ((void) (lock)) 52 # define rwlock_unlock(lock) ((void) (lock)) 53 #endif /* USE_LOCKS */ 54 55 /* gettext helper macro. */ 56 #define N_(Str) Str 57 58 /* Compiler-specific definitions. */ 59 #define strong_alias(name, aliasname) \ 60 extern __typeof (name) aliasname __attribute__ ((alias (#name))); 61 62 #ifdef __i386__ 63 # define internal_function __attribute__ ((regparm (3), stdcall)) 64 #else 65 # define internal_function /* nothing */ 66 #endif 67 68 #define internal_strong_alias(name, aliasname) \ 69 extern __typeof (name) aliasname __attribute__ ((alias (#name))) internal_function; 70 71 #define attribute_hidden \ 72 __attribute__ ((visibility ("hidden"))) 73 74 /* Define ALLOW_UNALIGNED if the architecture allows operations on 75 unaligned memory locations. */ 76 #if defined __i386__ || defined __x86_64__ 77 # define ALLOW_UNALIGNED 1 78 #else 79 # define ALLOW_UNALIGNED 0 80 #endif 81 82 #if DEBUGPRED 83 # ifdef __x86_64__ 84 asm (".section predict_data, \"aw\"; .previous\n" 85 ".section predict_line, \"a\"; .previous\n" 86 ".section predict_file, \"a\"; .previous"); 87 # ifndef PIC 88 # define debugpred__(e, E) \ 89 ({ long int _e = !!(e); \ 90 asm volatile (".pushsection predict_data; ..predictcnt%=: .quad 0; .quad 0\n" \ 91 ".section predict_line; .quad %c1\n" \ 92 ".section predict_file; .quad %c2; .popsection\n" \ 93 "addq $1,..predictcnt%=(,%0,8)" \ 94 : : "r" (_e == E), "i" (__LINE__), "i" (__FILE__)); \ 95 __builtin_expect (_e, E); \ 96 }) 97 # endif 98 # elif defined __i386__ 99 asm (".section predict_data, \"aw\"; .previous\n" 100 ".section predict_line, \"a\"; .previous\n" 101 ".section predict_file, \"a\"; .previous"); 102 # ifndef PIC 103 # define debugpred__(e, E) \ 104 ({ long int _e = !!(e); \ 105 asm volatile (".pushsection predict_data; ..predictcnt%=: .long 0; .long 0\n" \ 106 ".section predict_line; .long %c1\n" \ 107 ".section predict_file; .long %c2; .popsection\n" \ 108 "incl ..predictcnt%=(,%0,8)" \ 109 : : "r" (_e == E), "i" (__LINE__), "i" (__FILE__)); \ 110 __builtin_expect (_e, E); \ 111 }) 112 # endif 113 # endif 114 # ifdef debugpred__ 115 # define unlikely(e) debugpred__ (e,0) 116 # define likely(e) debugpred__ (e,1) 117 # endif 118 #endif 119 #ifndef likely 120 # define unlikely(expr) __builtin_expect (!!(expr), 0) 121 # define likely(expr) __builtin_expect (!!(expr), 1) 122 #endif 123 124 #define obstack_calloc(ob, size) \ 125 ({ size_t _s = (size); memset (obstack_alloc (ob, _s), '\0', _s); }) 126 #define obstack_strdup(ob, str) \ 127 ({ const char *_s = (str); obstack_copy0 (ob, _s, strlen (_s)); }) 128 #define obstack_strndup(ob, str, n) \ 129 ({ const char *_s = (str); obstack_copy0 (ob, _s, strnlen (_s, n)); }) 130 131 #if __STDC_VERSION__ >= 199901L 132 # define flexarr_size /* empty */ 133 #else 134 # define flexarr_size 0 135 #endif 136 137 /* Calling conventions. */ 138 #ifdef __i386__ 139 # define CALLING_CONVENTION regparm (3), stdcall 140 # define AND_CALLING_CONVENTION , regparm (3), stdcall 141 #else 142 # define CALLING_CONVENTION 143 # define AND_CALLING_CONVENTION 144 #endif 145 146 /* Avoid PLT entries. */ 147 #ifdef PIC 148 # define INTUSE(name) _INTUSE(name) 149 # define _INTUSE(name) __##name##_internal 150 # define INTDEF(name) _INTDEF(name) 151 # define _INTDEF(name) \ 152 extern __typeof__ (name) __##name##_internal __attribute__ ((alias (#name))); 153 # define INTDECL(name) _INTDECL(name) 154 # define _INTDECL(name) \ 155 extern __typeof__ (name) __##name##_internal attribute_hidden; 156 #else 157 # define INTUSE(name) name 158 # define INTDEF(name) /* empty */ 159 # define INTDECL(name) /* empty */ 160 #endif 161 162 /* This macro is used by the tests conditionalize for standalone building. */ 163 #define ELFUTILS_HEADER(name) <lib##name.h> 164 165 166 #ifdef SHARED 167 # define OLD_VERSION(name, version) \ 168 asm (".globl _compat." #version "." #name "\n" \ 169 "_compat." #version "." #name " = " #name "\n" \ 170 ".symver _compat." #version "." #name "," #name "@" #version); 171 # define NEW_VERSION(name, version) \ 172 asm (".symver " #name "," #name "@@@" #version); 173 # define COMPAT_VERSION_NEWPROTO(name, version, prefix) \ 174 asm (".symver _compat." #version "." #name "," #name "@" #version); \ 175 __typeof (_compat_##prefix##_##name) _compat_##prefix##_##name \ 176 asm ("_compat." #version "." #name); 177 # define COMPAT_VERSION(name, version, prefix) \ 178 asm (".symver _compat." #version "." #name "," #name "@" #version); \ 179 __typeof (name) _compat_##prefix##_##name asm ("_compat." #version "." #name); 180 #else 181 # define OLD_VERSION(name, version) /* Nothing for static linking. */ 182 # define NEW_VERSION(name, version) /* Nothing for static linking. */ 183 # define COMPAT_VERSION_NEWPROTO(name, version, prefix) \ 184 error "should use #ifdef SHARED" 185 # define COMPAT_VERSION(name, version, prefix) error "should use #ifdef SHARED" 186 #endif 187 188 189 #endif /* eu-config.h */ 190
