projects / apple / dyld.git / blame
| Commit | Line | Data |
|---|---|---|
| bac542e6 A |
1 | /* |
| 2 | * Copyright (c) 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 | #include <stdio.h> // fprintf(), NULL | |
| 24 | #include <stdlib.h> // exit(), EXIT_SUCCESS | |
| 25 | #include <unistd.h> | |
| 26 | #include <mach-o/getsect.h> | |
| 27 | #include <mach/mach.h> | |
| 28 | #include <mach/mach_vm.h> | |
| 29 | #include "test.h" // PASS(), FAIL(), XPASS(), XFAIL() | |
| 30 | ||
| 31 | ||
| 32 | extern void foo(); | |
| 33 | extern int fooData; | |
| 34 | ||
| 35 | static vm_prot_t getPermission(void* addr) | |
| 36 | { | |
| 37 | mach_vm_address_t address = (mach_vm_address_t)(uintptr_t)addr; | |
| 38 | kern_return_t result; | |
| 39 | mach_port_t object_name; | |
| 40 | vm_region_basic_info_data_64_t info; | |
| 41 | mach_msg_type_number_t count; | |
| 42 | mach_vm_size_t size = 4096; | |
| 43 | ||
| 44 | count = VM_REGION_BASIC_INFO_COUNT_64; | |
| 45 | result = mach_vm_region(mach_task_self(), | |
| 46 | &address, | |
| 47 | &size, | |
| 48 | VM_REGION_BASIC_INFO_64, | |
| 49 | (vm_region_info_t)&info, | |
| 50 | &count, | |
| 51 | &object_name); | |
| 52 | //fprintf(stderr, "result=%X, info.protection=%X\n", result, info.protection); | |
| 53 | if ( result == KERN_SUCCESS ) | |
| 54 | return info.protection; | |
| 55 | return 0; | |
| 56 | } | |
| 57 | ||
| 58 | ||
| 59 | static void* getStubAddr() | |
| 60 | { | |
| 61 | unsigned long size; | |
| 62 | #if __i386__ | |
| 63 | return getsectdata("__IMPORT", "__jump_table", &size); | |
| 64 | #elif __ppc__ | |
| 65 | void* p = getsectdata("__TEXT", "__picsymbolstub1", &size); | |
| 66 | if ( p != NULL ) | |
| 67 | return p; | |
| 68 | return getsectdata("__TEXT", "__symbol_stub1", &size); | |
| 69 | #elif __ppc64__ | |
| 70 | return getsectdata("__TEXT", "__picsymbolstub1", &size); | |
| 71 | #elif __x86_64__ | |
| 72 | return getsectdata("__TEXT", "__symbol_stub1", &size); | |
| 73 | #else | |
| 74 | #error unknown arch | |
| 75 | #endif | |
| 76 | } | |
| 77 | ||
| 78 | ||
| 79 | static void checkStubs(void* addr) | |
| 80 | { | |
| 81 | vm_prot_t perm = getPermission(addr); | |
| 82 | if ( (perm == 0) || ((perm & VM_PROT_WRITE) != 0) ) { | |
| 83 | FAIL("read-only-stubs: bad permissions %d at address %p", perm, addr); | |
| 84 | exit(0); | |
| 85 | } | |
| 86 | } | |
| 87 | ||
| 88 | ||
| 89 | int main() | |
| 90 | { | |
| 91 | void* stubAddr = getStubAddr(); | |
| 92 | checkStubs(stubAddr); | |
| 93 | fooData = 1; | |
| 94 | foo(); | |
| 95 | checkStubs(stubAddr); | |
| 96 | PASS("read-only-stubs"); | |
| 97 | return EXIT_SUCCESS; | |
| 98 | } | |
| 99 | ||
| 100 |