1 /* 2 * Copyright (c) 2008 Apple 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 #ifndef _KXLD_VTABLE_H_ 29 #define _KXLD_VTABLE_H_ 30 31 #include <sys/types.h> 32 #if KERNEL 33 #include <libkern/kxld_types.h> 34 #else 35 #include "kxld_types.h" 36 #endif 37 38 #include "kxld_array.h" 39 40 struct kxld_array; 41 struct kxld_object; 42 struct kxld_reloc; 43 struct kxld_relocator; 44 struct kxld_sect; 45 struct kxld_sym; 46 struct kxld_symtab; 47 struct kxld_vtable_hdr; 48 struct section; 49 50 typedef struct kxld_vtable KXLDVTable; 51 typedef union kxld_vtable_entry KXLDVTableEntry; 52 53 struct kxld_vtable { 54 u_char *vtable; 55 const char *name; 56 KXLDArray entries; 57 boolean_t is_patched; 58 }; 59 60 struct kxld_vtable_patched_entry { 61 char *name; 62 kxld_addr_t addr; 63 }; 64 65 struct kxld_vtable_unpatched_entry { 66 const struct kxld_sym *sym; 67 struct kxld_reloc *reloc; 68 }; 69 70 union kxld_vtable_entry { 71 struct kxld_vtable_patched_entry patched; 72 struct kxld_vtable_unpatched_entry unpatched; 73 }; 74 75 /******************************************************************************* 76 * Constructors and destructors 77 *******************************************************************************/ 78 79 kern_return_t kxld_vtable_init(KXLDVTable *vtable, 80 const struct kxld_sym *vtable_sym, const struct kxld_object *object, 81 const struct kxld_dict *defined_cxx_symbols) 82 __attribute__((nonnull, visibility("hidden"))); 83 84 void kxld_vtable_clear(KXLDVTable *vtable) 85 __attribute__((visibility("hidden"))); 86 87 void kxld_vtable_deinit(KXLDVTable *vtable) 88 __attribute__((visibility("hidden"))); 89 90 /******************************************************************************* 91 * Accessors 92 *******************************************************************************/ 93 94 KXLDVTableEntry * kxld_vtable_get_entry_for_offset(const KXLDVTable *vtable, 95 u_long offset, boolean_t is_32_bit) 96 __attribute__((pure, nonnull, visibility("hidden"))); 97 98 /******************************************************************************* 99 * Modifiers 100 *******************************************************************************/ 101 102 /* With strict patching, the vtable patcher with only patch pad slots */ 103 kern_return_t kxld_vtable_patch(KXLDVTable *vtable, const KXLDVTable *super_vtable, 104 struct kxld_object *object) 105 __attribute__((nonnull, visibility("hidden"))); 106 107 #endif /* _KXLD_VTABLE_H_ */ 108