/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This 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 OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ */ /* * Mach Operating System * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and ditribute 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/error.h> #include <mach/vm_param.h> #include <mach/boolean.h> #include <kern/misc_protos.h> #include <kern/syscall_emulation.h> #include <kern/task.h> #include <kern/kalloc.h> #include <vm/vm_kern.h> #include <machine/thread.h> /* for syscall_emulation_sync */ /* * Exported interface */ /* * WARNING: * This code knows that kalloc() allocates memory most efficiently * in sizes that are powers of 2, and asks for those sizes. */ /* * Go from number of entries to size of struct eml_dispatch and back. */ #define base_size (sizeof(struct eml_dispatch) - sizeof(eml_routine_t)) #define count_to_size(count) \ (base_size + sizeof(vm_offset_t) * (count)) #define size_to_count(size) \ ( ((size) - base_size) / sizeof(vm_offset_t) ) /* Forwards */ kern_return_t task_set_emulation_vector_internal( task_t task, int vector_start, emulation_vector_t emulation_vector, mach_msg_type_number_t emulation_vector_count); /* * eml_init: initialize user space emulation code */ void eml_init(void) { } /* * eml_task_reference() [Exported] * * Bumps the reference count on the common emulation * vector. */ void eml_task_reference( task_t task, task_t parent) { register eml_dispatch_t eml; if (parent == TASK_NULL) eml = EML_DISPATCH_NULL; else eml = parent->eml_dispatch; if (eml != EML_DISPATCH_NULL) { mutex_lock(&eml->lock); eml->ref_count++; mutex_unlock(&eml->lock); } task->eml_dispatch = eml; } /* * eml_task_deallocate() [Exported] * * Cleans up after the emulation code when a process exits. */ void eml_task_deallocate( task_t task) { register eml_dispatch_t eml; eml = task->eml_dispatch; if (eml != EML_DISPATCH_NULL) { int count; mutex_lock(&eml->lock); count = --eml->ref_count; mutex_unlock(&eml->lock); if (count == 0) kfree((vm_offset_t)eml, count_to_size(eml->disp_count)); task->eml_dispatch = EML_DISPATCH_NULL; } } /* * task_set_emulation_vector: [Server Entry] * set a list of emulated system calls for this task. */ kern_return_t task_set_emulation_vector_internal( task_t task, int vector_start, emulation_vector_t emulation_vector, mach_msg_type_number_t emulation_vector_count) { return KERN_NOT_SUPPORTED; } /* * task_set_emulation_vector: [Server Entry] * * Set the list of emulated system calls for this task. * The list is out-of-line. */ kern_return_t task_set_emulation_vector( task_t task, int vector_start, emulation_vector_t emulation_vector, mach_msg_type_number_t emulation_vector_count) { return KERN_NOT_SUPPORTED; } /* * task_get_emulation_vector: [Server Entry] * * Get the list of emulated system calls for this task. * List is returned out-of-line. */ kern_return_t task_get_emulation_vector( task_t task, int *vector_start, /* out */ emulation_vector_t *emulation_vector, /* out */ mach_msg_type_number_t *emulation_vector_count) /* out */ { return KERN_NOT_SUPPORTED; } /* * task_set_emulation: [Server Entry] * set up for user space emulation of syscalls within this task. */ kern_return_t task_set_emulation( task_t task, vm_offset_t routine_entry_pt, int routine_number) { return KERN_NOT_SUPPORTED; }