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+/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
+ *
+ * Copyright (c) 2003-2010 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+#ifndef _CACHE_PATCHING_H_
+#define _CACHE_PATCHING_H_
+
+#include "MachOLoaded.h"
+
+//
+// MARK: --- V1 patching. This is for old caches, before Large/Split caches ---
+//
+
+struct dyld_cache_patch_info_v1
+{
+ uint64_t patchTableArrayAddr; // (unslid) address of array for dyld_cache_image_patches for each image
+ uint64_t patchTableArrayCount; // count of patch table entries
+ uint64_t patchExportArrayAddr; // (unslid) address of array for patch exports for each image
+ uint64_t patchExportArrayCount; // count of patch exports entries
+ uint64_t patchLocationArrayAddr; // (unslid) address of array for patch locations for each patch
+ uint64_t patchLocationArrayCount;// count of patch location entries
+ uint64_t patchExportNamesAddr; // blob of strings of export names for patches
+ uint64_t patchExportNamesSize; // size of string blob of export names for patches
+};
+
+struct dyld_cache_image_patches_v1
+{
+ uint32_t patchExportsStartIndex;
+ uint32_t patchExportsCount;
+};
+
+struct dyld_cache_patchable_export_v1
+{
+ uint32_t cacheOffsetOfImpl;
+ uint32_t patchLocationsStartIndex;
+ uint32_t patchLocationsCount;
+ uint32_t exportNameOffset;
+};
+
+struct dyld_cache_patchable_location_v1
+{
+ uint32_t cacheOffset;
+ uint64_t high7 : 7,
+ addend : 5, // 0..31
+ authenticated : 1,
+ usesAddressDiversity : 1,
+ key : 2,
+ discriminator : 16;
+
+ uint64_t getAddend() const {
+ uint64_t unsingedAddend = addend;
+ int64_t signedAddend = (int64_t)unsingedAddend;
+ signedAddend = (signedAddend << 52) >> 52;
+ return (uint64_t)signedAddend;
+ }
+};
+
+//
+// MARK: --- V2 patching. This is for Large/Split caches and newer ---
+//
+struct dyld_cache_patch_info_v2
+{
+ uint32_t patchTableVersion; // == 2
+ uint32_t patchLocationVersion; // == 0 for now
+ uint64_t patchTableArrayAddr; // (unslid) address of array for dyld_cache_image_patches_v2 for each image
+ uint64_t patchTableArrayCount; // count of patch table entries
+ uint64_t patchImageExportsArrayAddr; // (unslid) address of array for dyld_cache_image_export_v2 for each image
+ uint64_t patchImageExportsArrayCount; // count of patch table entries
+ uint64_t patchClientsArrayAddr; // (unslid) address of array for dyld_cache_image_clients_v2 for each image
+ uint64_t patchClientsArrayCount; // count of patch clients entries
+ uint64_t patchClientExportsArrayAddr; // (unslid) address of array for patch exports for each client image
+ uint64_t patchClientExportsArrayCount; // count of patch exports entries
+ uint64_t patchLocationArrayAddr; // (unslid) address of array for patch locations for each patch
+ uint64_t patchLocationArrayCount; // count of patch location entries
+ uint64_t patchExportNamesAddr; // blob of strings of export names for patches
+ uint64_t patchExportNamesSize; // size of string blob of export names for patches
+};
+
+struct dyld_cache_image_patches_v2
+{
+ uint32_t patchClientsStartIndex;
+ uint32_t patchClientsCount;
+ uint32_t patchExportsStartIndex; // Points to dyld_cache_image_export_v2[]
+ uint32_t patchExportsCount;
+};
+
+struct dyld_cache_image_export_v2
+{
+ uint32_t dylibOffsetOfImpl; // Offset from the dylib we used to find a dyld_cache_image_patches_v2
+ uint32_t exportNameOffset : 28;
+ uint32_t patchKind : 4; // One of DyldSharedCache::patchKind
+};
+
+static_assert(sizeof(dyld_cache_image_export_v2) == 8, "Wrong size");
+
+struct dyld_cache_image_clients_v2
+{
+ uint32_t clientDylibIndex;
+ uint32_t patchExportsStartIndex; // Points to dyld_cache_patchable_export_v2[]
+ uint32_t patchExportsCount;
+};
+
+struct dyld_cache_patchable_export_v2
+{
+ uint32_t imageExportIndex; // Points to dyld_cache_image_export_v2
+ uint32_t patchLocationsStartIndex; // Points to dyld_cache_patchable_location_v2[]
+ uint32_t patchLocationsCount;
+};
+
+struct dyld_cache_patchable_location_v2
+{
+ uint32_t dylibOffsetOfUse; // Offset from the dylib we used to get a dyld_cache_image_clients_v2
+ uint32_t high7 : 7,
+ addend : 5, // 0..31
+ authenticated : 1,
+ usesAddressDiversity : 1,
+ key : 2,
+ discriminator : 16;
+
+ uint64_t getAddend() const {
+ uint64_t unsingedAddend = addend;
+ int64_t signedAddend = (int64_t)unsingedAddend;
+ signedAddend = (signedAddend << 52) >> 52;
+ return (uint64_t)signedAddend;
+ }
+};
+
+//
+// MARK: --- V3 patching. This is V2 plus support for GOT combining ---
+//
+struct dyld_cache_patch_info_v3 : dyld_cache_patch_info_v2
+{
+ // uint32_t patchTableVersion; // == 3
+ // ... other fields from dyld_cache_patch_info_v2
+ uint64_t gotClientsArrayAddr; // (unslid) address of array for dyld_cache_image_got_clients_v3 for each image
+ uint64_t gotClientsArrayCount; // count of got clients entries. Should always match the patchTableArrayCount
+ uint64_t gotClientExportsArrayAddr; // (unslid) address of array for patch exports for each GOT image
+ uint64_t gotClientExportsArrayCount; // count of patch exports entries
+ uint64_t gotLocationArrayAddr; // (unslid) address of array for patch locations for each GOT patch
+ uint64_t gotLocationArrayCount; // count of patch location entries
+};
+
+struct dyld_cache_image_got_clients_v3
+{
+ uint32_t patchExportsStartIndex; // Points to dyld_cache_patchable_export_v3[]
+ uint32_t patchExportsCount;
+};
+
+struct dyld_cache_patchable_export_v3
+{
+ uint32_t imageExportIndex; // Points to dyld_cache_image_export_v2
+ uint32_t patchLocationsStartIndex; // Points to dyld_cache_patchable_location_v3[]
+ uint32_t patchLocationsCount;
+};
+
+struct dyld_cache_patchable_location_v3
+{
+ uint64_t cacheOffsetOfUse; // Offset from the cache header
+ uint32_t high7 : 7,
+ addend : 5, // 0..31
+ authenticated : 1,
+ usesAddressDiversity : 1,
+ key : 2,
+ discriminator : 16;
+
+ uint64_t getAddend() const {
+ uint64_t unsingedAddend = addend;
+ int64_t signedAddend = (int64_t)unsingedAddend;
+ signedAddend = (signedAddend << 52) >> 52;
+ return (uint64_t)signedAddend;
+ }
+};
+
+#endif /* _CACHE_PATCHING_H_ */
+