--- /dev/null
+++ dyld/dyld-1335/common/SafeVMPrimitives.cpp
@@ -0,0 +1,82 @@
+/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*- vim: ft=cpp et ts=4 sw=4:
+ *
+ * Copyright (c) 2025 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@
+ */
+
+#if !TARGET_OS_EXCLAVEKIT
+#include <span>
+#include <mach/mach.h>
+#include <mach/mach_vm.h>
+#include <dispatch/dispatch.h>
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#include <os/security_config_private.h>
+
+#include "SafeVMPrimitives.h"
+
+
+
+kern_return_t vm_read_safe(vm_map_read_t target_task,
+                   mach_vm_address_t address,
+                   mach_vm_size_t size,
+                   vm_offset_t *data,
+                   mach_msg_type_number_t *dataCnt) {
+    vm_offset_t bounceBuffer;
+    // Mask out TBI bits
+    mach_vm_address_t mask = 0x00ff'ffff'ffff'ffffUL;
+    kern_return_t kr = mach_vm_read(target_task, mask & address, size, &bounceBuffer, dataCnt);
+    if (kr != KERN_SUCCESS) {
+        return kr;
+    }
+    // Allocate a copy buffer we can move bytes into in case the VM decides to share pages behind our backs
+    kr = vm_allocate(mach_task_self(), (vm_address_t *)data, *dataCnt, VM_FLAGS_ANYWHERE);
+    if (kr != KERN_SUCCESS) {
+        (void)vm_deallocate(mach_task_self(), (vm_address_t)bounceBuffer, *dataCnt);
+        return kr;
+    }
+    // Copy the memory with hooks for audit builds
+    remote_memory_audit_start();
+    memcpy((void*)(*data), (const void*)bounceBuffer,* dataCnt);
+    remote_memory_audit_end();
+    (void)vm_deallocate(mach_task_self(), (vm_address_t)bounceBuffer, *dataCnt);
+    return kr;
+}
+
+#if __cplusplus
+SafeRemoteBuffer::SafeRemoteBuffer(vm_map_read_t target_task, mach_vm_address_t address, mach_vm_size_t size, kern_return_t* kr) {
+    *kr = vm_read_safe(target_task, address, size, &_buffer, &_bufferSize);
+    if (*kr != KERN_SUCCESS) {
+        _buffer = 0;
+        _bufferSize = 0;
+    }
+}
+SafeRemoteBuffer::~SafeRemoteBuffer() {
+    if (_buffer == 0) { return; }
+    if (_bufferSize == 0) { return; }
+    (void)vm_deallocate(mach_task_self(), _buffer, _bufferSize);
+}
+
+std::span<std::byte> SafeRemoteBuffer::data() {
+    return std::span<std::byte>((std::byte*)_buffer, _bufferSize);
+}
+#endif // __cplusplus
+#endif // !TARGET_OS_EXCLAVEKIT