BlueToolFixup: Add Skip Address Check patch for 13.0 Beta 1 and newer (…

…#22)
acidanthera · Jun 25, 2022 · 7f3254b · 7f3254b
1 parent 8c04849
commit 7f3254b
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Showing 2 changed files with 22 additions and 3 deletions.
diff --git a/BrcmPatchRAM/BlueToolFixup.cpp b/BrcmPatchRAM/BlueToolFixup.cpp
@@ -56,19 +56,27 @@ static const uint8_t kSkipUpdateFilePathPatched[]  = "/System/Library/CoreServic
 static const uint8_t kSkipAddressCheckOriginal[] =
 {
     0x48, 0x89, 0xF3,             // mov    rbx, rsi
-    0xE8, 0xE3, 0xF3, 0xFE, 0xFF, // call   sub_1000c5bc6
+    0xE8, 0x00, 0x00, 0x00, 0x00, // call   <somewhere>
     0x85, 0xC0,                   // test   eax, eax
     0x74, 0x1D,                   // je
 };
 
 static const uint8_t kSkipAddressCheckPatched[] =
 {
     0x48, 0x89, 0xF3,             // mov        rbx, rsi
-    0xE8, 0xE3, 0xF3, 0xFE, 0xFF, // call       sub_1000c5bc6
+    0xE8, 0x00, 0x00, 0x00, 0x00, // call       <somewhere>
     0x85, 0xC0,                   // test       eax, eax
     0x72, 0x1D,                   // jb short
 };
 
+static const uint8_t kSkipAddressCheckMask[] =
+{
+    0xFF, 0xFF, 0xFF,
+    0xFF, 0x00, 0x00, 0x00, 0x00,
+    0xFF, 0xFF,
+    0xFF, 0xFF,
+};
+
 static const uint8_t kVendorCheckOriginal[] =
 {
     0x81, 0xFA,              // cmp edx
@@ -137,6 +145,16 @@ static inline void searchAndPatch(const void *haystack, size_t haystackSize, con
     searchAndPatch(haystack, haystackSize, path, needle, findSize * sizeof(T), patch, replaceSize * sizeof(T));
 }
 
+static inline void searchAndPatchWithMask(const void *haystack, size_t haystackSize, const char *path, const void *needle, size_t findSize, const void *findMask, size_t findMaskSize, const void *patch, size_t replaceSize, const void *patchMask, size_t replaceMaskSize) {
+    if (KernelPatcher::findAndReplaceWithMask(const_cast<void *>(haystack), haystackSize, needle, findSize, findMask, findMaskSize, patch, replaceSize, patchMask, replaceMaskSize))
+        DBGLOG(MODULE_SHORT, "found string to patch at %s!", path);
+}
+
+template <size_t findSize, size_t findMaskSize, size_t replaceSize, size_t replaceMaskSize, typename T>
+static inline void searchAndPatchWithMask(const void *haystack, size_t haystackSize, const char *path, const T (&needle)[findSize], const T (&findMask)[findMaskSize], const T (&patch)[replaceSize], const T (&patchMask)[replaceMaskSize]) {
+    searchAndPatchWithMask(haystack, haystackSize, path, needle, findSize * sizeof(T), findMask, findMaskSize * sizeof(T), patch, replaceSize * sizeof(T), patchMask, replaceSize * sizeof(T));
+}
+
 
 #pragma mark - Patched functions
 
@@ -157,7 +175,7 @@ static void patched_cs_validate_page(vnode_t vp, memory_object_t pager, memory_o
             if (shouldPatchBoardId)
                 searchAndPatch(data, PAGE_SIZE, path, boardIdsWithUSBBluetooth[0], kBoardIdSize, BaseDeviceInfo::get().boardIdentifier, kBoardIdSize);
             if (shouldPatchAddress)
-                searchAndPatch(data, PAGE_SIZE, path, kSkipAddressCheckOriginal, kSkipAddressCheckPatched);
+                searchAndPatchWithMask(data, PAGE_SIZE, path, kSkipAddressCheckOriginal, kSkipAddressCheckMask, kSkipAddressCheckPatched, kSkipAddressCheckMask);
         }
     }
 }

diff --git a/Changelog.md b/Changelog.md
@@ -2,6 +2,7 @@ BrcmPatchRAM Changelog
 ======================
 #### v2.6.3
 - Added constants for macOS 13 support
+- Fixed Skip Address Check patch for 13.0 Beta 1 and newer
 
 #### v2.6.2
 - Added Skip Address Check patch for 12.4 Beta 3 and newer (thx @khronokernel)