+++ /dev/null
-/*
- * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-/*
- * Mach Operating System
- * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
- * All Rights Reserved.
- *
- * 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 Mellon
- * the rights to redistribute these changes.
- */
-
-#include <mach/mach.h>
-#include <mach/boolean.h>
-#include <mach/machine/ndr_def.h>
-#include <mach/mach_traps.h>
-#include <mach/mach_host.h>
-#include <mach/mach_init.h>
-#include "externs.h"
-
-mach_port_t mach_task_self_ = MACH_PORT_NULL;
-mach_port_t mach_host_self_ = MACH_PORT_NULL;
-
-__private_extern__ kern_return_t _host_mach_msg_trap_return_;
-
-vm_size_t vm_page_size;
-vm_size_t vm_page_mask;
-int vm_page_shift;
-
-/*
- * Forward internal declarations for automatic mach_init during
- * fork() implementation.
- */
-/* fork() calls through atfork_child_routine */
-void (*_atfork_child_routine)(void);
-
-static void mach_atfork_child_routine(void);
-static boolean_t first = TRUE;
-static void (*previous_atfork_child_routine)(void);
-static boolean_t mach_init_inited = FALSE;
-extern int mach_init(void);
-extern void _pthread_set_self(void *);
-extern void cthread_set_self(void *);
-extern void other_libc_init(void);
-
-
-static void mach_atfork_child_routine(void)
-{
- /*
- * If an (*_atfork_child_routine)() was registered when
- * mach_init was first called, then call that routine
- * prior to performing our re-initialization. This ensures
- * that the post-fork handlers are called in exactly the
- * same order as the crt0 (exec) handlers. Any library
- * that makes use of the _atfork_child_routine must follow
- * the same technique.
- */
- if (previous_atfork_child_routine) {
- (*previous_atfork_child_routine)();
- }
- mach_init_inited = FALSE;
- mach_init();
-}
-
-mach_port_t
-mach_host_self()
-{
- return(host_self_trap());
-}
-
-int mach_init_doit(int forkchild)
-{
- host_t host;
-
- /*
- * Get the important ports into the cached values,
- * as required by "mach_init.h".
- */
-
- mach_task_self_ = task_self_trap();
- host = host_self_trap();
-
-
- if (!forkchild) {
- /*
- * Set up the post-fork child handler in the libc stub
- * to invoke this routine if this process forks. Save the
- * previous value in order that we can call that handler
- * prior to performing our postfork work.
- */
-
- first = FALSE;
- previous_atfork_child_routine = _atfork_child_routine;
- _atfork_child_routine = mach_atfork_child_routine;
- _pthread_set_self(0);
- cthread_set_self(0);
- }
-
- /*
- * Initialize the single mig reply port
- */
-
- mig_init(0);
-
- /*
- * Cache some other valuable system constants
- */
-
-#if defined(__ppc64__) /* NGK hack for now */
- vm_page_size = 4096;
-#else
- (void)host_page_size(host, &vm_page_size);
-#endif
- vm_page_mask = vm_page_size - 1;
- if (vm_page_size == 0) {
- /* guard against unlikely craziness */
- vm_page_shift = 0;
- } else {
- /*
- * Unfortunately there's no kernel interface to get the
- * vm_page_shift, but it's easy enough to calculate.
- */
- for (vm_page_shift = 0;
- (vm_page_size & (1 << vm_page_shift)) == 0;
- vm_page_shift++)
- continue;
- }
-
- mach_port_deallocate(mach_task_self_, host);
-
- mach_init_ports();
-
-#if WE_REALLY_NEED_THIS_GDB_HACK
- /*
- * Check to see if GDB wants us to stop
- */
- {
- task_user_data_data_t user_data;
- mach_msg_type_number_t user_data_count = TASK_USER_DATA_COUNT;
-
- user_data.user_data = 0;
- (void)task_info(mach_task_self_, TASK_USER_DATA,
- (task_info_t)&user_data, &user_data_count);
-#define MACH_GDB_RUN_MAGIC_NUMBER 1
-#ifdef MACH_GDB_RUN_MAGIC_NUMBER
- /* This magic number is set in mach-aware gdb
- * for RUN command to allow us to suspend user's
- * executable (linked with this libmach!)
- * with the code below.
- * This hack should disappear when gdb improves.
- */
- if ((int)user_data.user_data == MACH_GDB_RUN_MAGIC_NUMBER) {
- kern_return_t ret;
- user_data.user_data = 0;
-
- ret = task_suspend (mach_task_self_);
- if (ret != KERN_SUCCESS) {
- while(1) (void)task_terminate(mach_task_self_);
- }
- }
-#undef MACH_GDB_RUN_MAGIC_NUMBER
-#endif /* MACH_GDB_RUN_MAGIC_NUMBER */
- }
-#endif /* WE_REALLY_NEED_THIS_GDB_HACK */
-
- /*
- * Reserve page 0 so that the program doesn't get it as
- * the result of a vm_allocate() or whatever.
- */
- {
- vm_offset_t zero_page_start;
-
- zero_page_start = 0;
- (void)vm_map(mach_task_self_, &zero_page_start, vm_page_size,
- 0, FALSE, MEMORY_OBJECT_NULL, 0, TRUE,
- VM_PROT_NONE, VM_PROT_NONE, VM_INHERIT_COPY);
- /* ignore result, we don't care if it failed */
- }
-
- return(0);
-}
-
-#ifdef __DYNAMIC__
-/* libc_initializer is the dyld initializer for libc (3760827) */
-static void libc_initializer() __attribute__((constructor));
-static void
-libc_initializer()
-{
- mach_init();
-}
-#endif /* __DYNAMIC__ */
-
-/* mach_init may get called from the initializer and from crt.c, but only
- * call mach_init_doit() once */
-int mach_init(void)
-{
- int ret;
-
- if (mach_init_inited)
- return(0);
- mach_init_inited = TRUE;
- ret = mach_init_doit(0);
-
- /* Do other Libc initialization */
- other_libc_init();
-
- return ret;
-}
-
-int (*mach_init_routine)(void) = mach_init;
-int fork_mach_init()
-{
- /* called only from child */
- return(mach_init_doit(1));
-}
-
-#undef mach_task_self
-
-mach_port_t
-mach_task_self()
-{
- return(task_self_trap());
-}
-
-mach_port_t
-mach_thread_self()
-{
- return(thread_self_trap());
-}
projects / apple / libc.git / blobdiff