--- dyld/dyld-1122.1/cache-builder/AppCacheBuilder.cpp
+++ dyld/dyld-1042.1/cache-builder/AppCacheBuilder.cpp
@@ -175,10 +175,6 @@
     if ( dataConstRegion.sizeInUse != 0 )
         callback(dataConstRegion);
 
-    // dataSptmRegion
-    if ( dataSptmRegion.sizeInUse != 0 )
-        callback(dataSptmRegion);
-
     // branchGOTsRegion
     if ( branchGOTsRegion.bufferSize != 0 )
         callback(branchGOTsRegion);
@@ -291,17 +287,6 @@
     return totalTargets;
 }
 
-bool AppCacheBuilder::hasSancovGateSection() const
-{
-    for ( const AppCacheDylibInfo& dylib : sortedDylibs ) {
-        const dyld3::MachOAnalyzer* ma = dylib.input->mappedFile.mh;
-        if ( ma->hasSection("__DATA", "__sancov_gate") )
-            return true;
-    }
-
-    return false;
-}
-
 bool AppCacheBuilder::removeStubs()
 {
     // Only eliminate stubs in the base kernel collection.  We could eliminate stubs
@@ -310,9 +295,6 @@
         return false;
 
     if ( _options.archs != &dyld3::GradedArchs::arm64e )
-        return false;
-
-    if ( hasSancovGateSection() )
         return false;
 
     return true;
@@ -652,51 +634,6 @@
         dataConstRegion.maxProt     = VM_PROT_READ;
         dataConstRegion.name        = "__DATA_CONST";
     }
-
-    // __DATA_SPTM segments
-    {
-        __block uint64_t offsetInRegion = 0;
-        for (DylibInfo& dylib : sortedDylibs) {
-            if (!dylib.input->mappedFile.mh->hasSplitSeg())
-                continue;
-
-            __block uint64_t textSegVmAddr = 0;
-            dylib.input->mappedFile.mh->forEachSegment(^(const dyld3::MachOFile::SegmentInfo& segInfo, bool& stop) {
-                if ( strcmp(segInfo.segName, "__TEXT") == 0 )
-                    textSegVmAddr = segInfo.vmAddr;
-                if ( (segInfo.protections & VM_PROT_EXECUTE) != 0 )
-                    return;
-                if ( (strcmp(segInfo.segName, "__DATA_SPTM") != 0) )
-                    return;
-                uint32_t minAlignmentP2 = getMinAlignment(dylib.input->mappedFile.mh);
-                offsetInRegion = align(offsetInRegion, segInfo.p2align);
-                offsetInRegion = align(offsetInRegion, minAlignmentP2);
-                size_t copySize = std::min((size_t)segInfo.fileSize, (size_t)segInfo.sizeOfSections);
-                uint64_t dstCacheSegmentSize = align(segInfo.sizeOfSections, minAlignmentP2);
-                SegmentMappingInfo loc;
-                loc.srcSegment             = (uint8_t*)dylib.input->mappedFile.mh + segInfo.vmAddr - textSegVmAddr;
-                loc.segName                = segInfo.segName;
-                loc.dstSegment             = nullptr;
-                loc.dstCacheUnslidAddress  = offsetInRegion; // This will be updated later once we've assigned addresses
-                loc.dstCacheFileOffset     = (uint32_t)offsetInRegion;
-                loc.dstCacheSegmentSize    = (uint32_t)dstCacheSegmentSize;
-                loc.dstCacheFileSize       = (uint32_t)copySize;
-                loc.copySegmentSize        = (uint32_t)copySize;
-                loc.srcSegmentIndex        = segInfo.segIndex;
-                loc.parentRegion           = &dataSptmRegion;
-                dylib.cacheLocation[segInfo.segIndex] = loc;
-                offsetInRegion += loc.dstCacheSegmentSize;
-            });
-        }
-
-        // align r/o region end
-        dataSptmRegion.bufferSize  = align(offsetInRegion, 14);
-        dataSptmRegion.sizeInUse   = dataSptmRegion.bufferSize;
-        dataSptmRegion.initProt    = VM_PROT_READ;
-        dataSptmRegion.maxProt     = VM_PROT_READ;
-        dataSptmRegion.name        = "__DATA_SPTM";
-    }
-
 
     // Branch GOTs
     if ( branchTargetsFromKexts != 0 ) {
@@ -1168,8 +1105,6 @@
         uint64_t numBytesForPageStarts = 0;
         if ( dataConstRegion.sizeInUse != 0 )
             numBytesForPageStarts += sizeof(dyld_chained_starts_in_segment) + (sizeof(uint16_t) * numWritablePagesToFixup(dataConstRegion.bufferSize));
-        if ( dataSptmRegion.sizeInUse != 0 )
-            numBytesForPageStarts += sizeof(dyld_chained_starts_in_segment) + (sizeof(uint16_t) * numWritablePagesToFixup(dataSptmRegion.bufferSize));
         if ( branchGOTsRegion.bufferSize != 0 )
             numBytesForPageStarts += sizeof(dyld_chained_starts_in_segment) + (sizeof(uint16_t) * numWritablePagesToFixup(branchGOTsRegion.bufferSize));
         if ( readWriteRegion.sizeInUse != 0 )
@@ -4274,8 +4209,6 @@
 
         if ( dataConstRegion.sizeInUse != 0 )
             addSegmentStarts(dataConstRegion);
-        if ( dataSptmRegion.sizeInUse != 0 )
-            addSegmentStarts(dataSptmRegion);
         if ( branchGOTsRegion.sizeInUse != 0 )
             addSegmentStarts(branchGOTsRegion);
         if ( readWriteRegion.sizeInUse != 0 )
@@ -4370,12 +4303,6 @@
     if ( dataConstRegion.sizeInUse != 0 ) {
         vmOrder.emplace_back(&dataConstRegion, 14, 14);
         fileOrder.emplace_back(&dataConstRegion, 14, 14);
-    }
-
-    // __DATA_SPTM
-    if ( dataSptmRegion.sizeInUse != 0 ) {
-        vmOrder.emplace_back(&dataSptmRegion, 14, 14);
-        fileOrder.emplace_back(&dataSptmRegion, 14, 14);
     }
 
     // Split seg __TEXT_EXEC
@@ -5266,13 +5193,6 @@
                 firstDataRegion = &dataConstRegion;
             if ( (lastDataRegion == nullptr) || (dataConstRegion.buffer > lastDataRegion->buffer) )
                 lastDataRegion = &dataConstRegion;
-        }
-
-        if ( dataSptmRegion.sizeInUse != 0 ) {
-            if ( firstDataRegion == nullptr )
-                firstDataRegion = &dataSptmRegion;
-            if ( (lastDataRegion == nullptr) || (dataSptmRegion.buffer > lastDataRegion->buffer) )
-                lastDataRegion = &dataSptmRegion;
         }
 
         if ( branchGOTsRegion.bufferSize != 0 ) {