unit-tests/test-cases/text-relocs-perms/main.c

   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
  34 static vm_prot_t getPermission(void* addr)
  35 {
  36     mach_vm_address_t                           address = (mach_vm_address_t)(uintptr_t)addr;
  37     kern_return_t                                       result;
  38     mach_port_t                                         object_name;
  39     vm_region_basic_info_data_64_t      info;
  40     mach_msg_type_number_t                      count;
  41     mach_vm_size_t                                      size = 4096;
  42
  43         count = VM_REGION_BASIC_INFO_COUNT_64;
  44         result = mach_vm_region(mach_task_self(),
  45                                         &address,
  46                                         &size,
  47                                         VM_REGION_BASIC_INFO_64,
  48                                         (vm_region_info_t)&info,
  49                                         &count,
  50                                         &object_name);
  51         //fprintf(stderr, "result=%X, info.protection=%X\n", result, info.protection);
  52         if ( result == KERN_SUCCESS )
  53                 return info.protection;
  54         return 0;
  55 }
  56
  57
  58 static void* getStubAddr()
  59 {
  60         unsigned long size;
  61 #if __i386__
  62         return getsectdata("__IMPORT", "__jump_table", &size);
  63 #elif __ppc__
  64         void* p = getsectdata("__TEXT", "__picsymbolstub1", &size);
  65         if ( p != NULL )
  66                 return p;
  67         return getsectdata("__TEXT", "__symbol_stub1", &size);
  68 #elif __ppc64__
  69         return getsectdata("__TEXT", "__picsymbolstub1", &size);
  70 #elif __x86_64__
  71         return getsectdata("__TEXT", "__symbol_stub1", &size);
  72 #elif __arm__
  73         void* p = getsectdata("__TEXT", "__symbol_stub4", &size);
  74         if ( p != NULL )
  75                 return p;
  76         return getsectdata("__TEXT", "__symbolstub1", &size);
  77 #else
  78         #error unknown arch
  79 #endif
  80 }
  81
  82
  83 static void checkStubs(void* addr)
  84 {
  85         vm_prot_t perm = getPermission(addr);
  86         if ( (perm == 0) || ((perm & VM_PROT_WRITE) != 0) ) {
  87                 FAIL("read-only-stubs: bad permissions %d at address %p", perm, addr);
  88                 exit(0);
  89         }
  90 }
  91
  92
  93 int main()
  94 {
  95         foo();
  96
  97         void* stubAddr = getStubAddr();
  98 #if __i386__
  99         if ( stubAddr != NULL )
 100 #endif
 101         {
 102         checkStubs(stubAddr);
 103         checkStubs(stubAddr);
 104         }
 105         PASS("text-relocs-perms");
 106         return EXIT_SUCCESS;
 107 }
 108
 109