2 * Copyright (c) 2006-2007 Apple Inc. All rights reserved.
4 * @APPLE_LICENSE_HEADER_START@
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
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.
21 * @APPLE_LICENSE_HEADER_END@
23 #include <stdio.h> // fprintf(), NULL
24 #include <string.h> // memcpy
25 #include <stdlib.h> // exit(), EXIT_SUCCESS
27 #include <libkern/OSCacheControl.h> // sys_icache_invalidate
28 #include <sys/mman.h> // for mprotext
29 #include <mach/mach.h>
31 #include "test.h" // PASS(), FAIL(), XPASS(), XFAIL()
35 void* calldlopen(const char* path
, int mode
, void* (*dlopen_proc
)(const char* path
, int mode
))
37 return (*dlopen_proc
)(path
, mode
);
41 #define START_OF_FUNC(x) ((void*)((long)x & (-2)))
42 #define ADDR_FROM_BLOCK(x) ((void*)((long)x | 1))
44 #define START_OF_FUNC(x) (x)
45 #define ADDR_FROM_BLOCK(x) (x)
49 // try calling dlopen() from code not owned by dyld
53 // now try to create a page where foo() was
54 vm_address_t addr
= 0;
55 kern_return_t r
= vm_allocate(mach_task_self(), &addr
, 4096, VM_FLAGS_ANYWHERE
);
56 if ( r
!= KERN_SUCCESS
) {
57 FAIL("vm_allocate returned %d", r
);
60 void* codeBlock
= (void*)(addr
);
61 memcpy(codeBlock
, START_OF_FUNC(calldlopen
), 4096);
62 sys_icache_invalidate(codeBlock
, 4096);
63 mprotect(codeBlock
, 4096, PROT_READ
| PROT_EXEC
);
64 //fprintf(stderr, "codeBlock=%p\n", codeBlock);
66 void* (*caller
)(const char* path
, int mode
, void* (*dlopen_proc
)(const char* path
, int mode
)) = ADDR_FROM_BLOCK(codeBlock
);
68 void* handle
= (*caller
)("foo.bundle", RTLD_LAZY
, &dlopen
);
69 if ( handle
== NULL
) {
70 FAIL("dlopen(\"%s\") failed with: %s", "foo.bundle", dlerror());
74 void* sym
= dlsym(handle
, "foo");
76 FAIL("dlsym(handle, \"foo\") failed");
80 int result
= dlclose(handle
);
82 FAIL("dlclose(handle) returned %d", result
);
86 PASS("dlopen-from-anonymous-code");