sys/_libc_init.c

   1 /*
   2  * Copyright (c) 2005-2007 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  * _libc_initializer() is called from libSystem_initializer()
  25  */
  26
  27 #include <crt_externs.h>
  28 #include <limits.h>
  29 #include <stdint.h>
  30 #include <string.h>
  31 #include <stdlib.h>
  32 #include <machine/cpu_capabilities.h>
  33 #include <TargetConditionals.h>
  34 #include <_simple.h>
  35
  36 #include "libc_private.h"
  37
  38 extern void _program_vars_init(const struct ProgramVars *vars);
  39 extern void _libc_fork_init(const struct _libc_functions *funcs);
  40 extern void _arc4_init(void);
  41 extern void __atexit_init(void);
  42 extern void __confstr_init(const struct _libc_functions *funcs);
  43 extern void _init_clock_port(void);
  44 extern void __chk_init(void);
  45 extern void __xlocale_init(void);
  46 extern void __guard_setup(const char *apple[]);
  47 extern void _subsystem_init(const char *apple[]);
  48
  49 void
  50 _libc_initializer(const struct _libc_functions *funcs,
  51         const char *envp[],
  52         const char *apple[],
  53         const struct ProgramVars *vars)
  54 {
  55         _program_vars_init(vars);
  56         _libc_fork_init(funcs);
  57         __confstr_init(funcs);
  58         __atexit_init();
  59         _init_clock_port();
  60         __chk_init();
  61         __xlocale_init();
  62         __guard_setup(apple);
  63         _subsystem_init(apple);
  64 }
  65
  66
  67 void
  68 __libc_init(const struct ProgramVars *vars,
  69         void (*atfork_prepare)(void),
  70         void (*atfork_parent)(void),
  71         void (*atfork_child)(void),
  72         const char *apple[])
  73 {
  74         const struct _libc_functions funcs = {
  75                 .version = 1,
  76                 .atfork_prepare = atfork_prepare,
  77                 .atfork_parent = atfork_parent,
  78                 .atfork_child = atfork_child,
  79                 .dirhelper = NULL,
  80         };
  81
  82         return _libc_initializer(&funcs, NULL, apple, vars);
  83 }