--- dyld/dyld-625.13/dyld3/libdyldEntryVector.cpp
+++ dyld/dyld-519.2.1/dyld3/libdyldEntryVector.cpp
@@ -26,14 +26,12 @@
 #include "dyld_priv.h"
 #include "libdyldEntryVector.h"
 #include "AllImages.h"
-#include "Array.h"
-#include "Loading.h"
 #include "Logging.h"
 #include "PathOverrides.h"
-#include "StartGlue.h"
-#include "dyld_process_info_internal.h"
+#include "LaunchCacheFormat.h"
 
-extern "C" char start;
+extern "C" void start();
+
 
 VIS_HIDDEN const char** appleParams;
 
@@ -91,38 +89,32 @@
     gAllImages.setOldAllImageInfo(old);
 }
 
-static void entry_setNotifyMonitoringDyldMain(void (*notifyMonitoringDyldMain)()) {
-    setNotifyMonitoringDyldMain(notifyMonitoringDyldMain);
-}
-
-static void entry_setNotifyMonitoringDyld(void (*notifyMonitoringDyld)(bool unloading,unsigned imageCount,
-                                                                               const struct mach_header* loadAddresses[],
-                                                                               const char* imagePaths[])) {
-    setNotifyMonitoringDyld(notifyMonitoringDyld);
-}
-
-static void entry_setInitialImageList(const closure::LaunchClosure* closure,
-                                const DyldSharedCache* dyldCacheLoadAddress, const char* dyldCachePath,
-                                const Array<LoadedImage>& initialImages, const LoadedImage& libSystem)
+static void entry_setInitialImageList(const launch_cache::binary_format::Closure* closure,
+                                const void* dyldCacheLoadAddress, const char* dyldCachePath,
+                                const dyld3::launch_cache::DynArray<loader::ImageInfo>& initialImages,
+                                const mach_header* libSystemMH, const launch_cache::binary_format::Image* libSystemImage)
 {
     gAllImages.init(closure, dyldCacheLoadAddress, dyldCachePath, initialImages);
-    gAllImages.applyInterposingToDyldCache(closure);
+    gAllImages.applyInterposingToDyldCache(closure, initialImages);
 
     const char* mainPath = _simple_getenv(appleParams, "executable_path");
     if ( (mainPath != nullptr) && (mainPath[0] == '/') )
         gAllImages.setMainPath(mainPath);
 
+    // ok to call before malloc is ready because 4 slots are reserved.
+    gAllImages.setInitialGroups();
+
     // run initializer for libSytem.B.dylib
     // this calls back into _dyld_initializer which calls gAllIimages.addImages()
-    gAllImages.runLibSystemInitializer(libSystem);
+    gAllImages.runLibSystemInitializer(libSystemMH, libSystemImage);
 
     // now that malloc is available, parse DYLD_ env vars
-    closure::gPathOverrides.setEnvVars((const char**)environ, gAllImages.mainExecutable(), gAllImages.mainExecutableImage()->path());
+    gPathOverrides.setEnvVars((const char**)environ);
 }
 
 static void entry_runInitialzersBottomUp(const mach_header* mainExecutableImageLoadAddress)
 {
-    gAllImages.runStartupInitialzers();
+    gAllImages.runInitialzersBottomUp(mainExecutableImageLoadAddress);
     gAllImages.notifyMonitorMain();
 }
 
@@ -131,25 +123,17 @@
     sChildForkFunction = func;
 }
 
-static void entry_setRestrictions(bool allowAtPaths, bool allowEnvPaths)
-{
-    gAllImages.setRestrictions(allowAtPaths, allowEnvPaths);
-}
-
 const LibDyldEntryVector entryVectorForDyld = {
     LibDyldEntryVector::kCurrentVectorVersion,
-    closure::kFormatVersion,
+    launch_cache::binary_format::kFormatVersion,
     &entry_setVars,
     &entry_setHaltFunction,
     &entry_setOldAllImageInfo,
     &entry_setInitialImageList,
     &entry_runInitialzersBottomUp,
-    (__typeof(LibDyldEntryVector::startFunc))address_of_start,
+    &start,
     &entry_setChildForkFunction,
     &entry_setLogFunction,
-    &entry_setRestrictions,
-    &entry_setNotifyMonitoringDyldMain,
-    &entry_setNotifyMonitoringDyld
 };
 
 VIS_HIDDEN void _dyld_fork_child()