1/*
2 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_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. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/*
29 * catch_exception_raise will be implemented by user programs
30 * This implementation is provided to resolve the reference in
31 * exc_server().
32 */
33
34#include <mach/boolean.h>
35#include <mach/message.h>
36#include <mach/exception.h>
37#include <mach/mig_errors.h>
38#include <dlfcn.h>
39#include <stdlib.h>
40
41__private_extern__ kern_return_t internal_catch_exception_raise (
42    mach_port_t exception_port,
43    mach_port_t thread,
44    mach_port_t task,
45    exception_type_t exception,
46    exception_data_t code,
47    mach_msg_type_number_t codeCnt)
48{
49#if defined(__DYNAMIC__)
50    static int checkForFunction = 0;
51    /* This will be non-zero if the user has defined this function */
52    static kern_return_t (*func)(mach_port_t, mach_port_t, mach_port_t, exception_type_t, exception_data_t, mach_msg_type_number_t);
53    if (checkForFunction == 0) {
54        checkForFunction = 1;
55		func = dlsym(RTLD_DEFAULT, "catch_exception_raise");
56    }
57    if (func == 0) {
58        /* The user hasn't defined catch_exception_raise in their binary */
59        abort();
60    }
61    return (*func)(exception_port, thread, task, exception, code, codeCnt);
62#else
63    extern kern_return_t catch_exception_raise(mach_port_t, mach_port_t, mach_port_t, exception_type_t, exception_data_t, mach_msg_type_number_t);
64    return catch_exception_raise(exception_port, thread, task, exception, code, codeCnt);
65#endif
66}
67
68