--- /dev/null
+++ libmalloc/libmalloc-792.80.2/src/early_malloc.h
@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2023 Apple Computer, 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 __EARLY_MALLOC_H
+#define __EARLY_MALLOC_H
+#pragma GCC visibility push(hidden)
+
+#if CONFIG_EARLY_MALLOC
+
+#include <stdbool.h>
+#include <malloc/malloc.h>
+
+/*!
+ * @file early_allocator.h
+ *
+ * @discussion
+ * The early allocator, cheekingly called "my first malloc" is a simple
+ * allocator which is meant to support two use-cases such as:
+ *
+ * - malloc internal dynamic allocations,
+ * - xzone first allocations in buckets until it is proven
+ *   that buckets are used enough.
+ *
+ * Its purpose is to be extremely simple and compact, and is not meant
+ * to be feature rich. It will never implement things like:
+ * - returning memory to the system,
+ * - any form of scalability,
+ * - realloc,
+ * - allocations with alignment requirements,
+ * - allocations larger than MFM_ALLOC_SIZE_MAX,
+ * - ...
+ *
+ * It also is of limited capacity, and if mfm_alloc() fails,
+ * then the caller should retry with another backend.
+ */
+
+
+/*!
+ * @macro MFM_ALLOC_SIZE_MAX
+ *
+ * @brief
+ * The maximum allocation size that this allocator supports.
+ */
+#define MFM_ALLOC_SIZE_MAX      (16ul << 10)
+
+
+extern void mfm_lock(void);
+
+extern void mfm_unlock(void);
+
+extern void mfm_reinit_lock(void);
+
+/*!
+ * @function mfm_initialize()
+ *
+ * @brief
+ * Initializes the early allocator.
+ *
+ * @discussion
+ * This function isn't thread safe and must be serialized
+ * by the caller.
+ */
+extern void mfm_initialize(void);
+
+/*!
+ * @function mfm_alloc_size()
+ *
+ * @brief
+ * Returns the size of an allocation made with @c mfm_alloc(),
+ * or @c 0 if the pointer doesn't belong to it.
+ */
+extern size_t mfm_alloc_size(const void *ptr);
+
+/*!
+ * @function mfm_alloc()
+ *
+ * @brief
+ * Perform an allocation with the early allocator.
+ *
+ * @discussion
+ * The early allocator will only support a very small subset
+ * of malloc features. Its allocations will always be zeroed,
+ * and 16 bytes aligned.
+ */
+extern void *mfm_alloc(size_t size) __alloc_size(1);
+
+/*!
+ * @function mfm_free()
+ *
+ * @brief
+ * Frees a pointer allocated with @c mfm_alloc().
+ *
+ * @discussion
+ * Passing a pointer that doesn't belong to the early allocator
+ * is undefined and will result in process termination.
+ */
+extern void mfm_free(void *ptr);
+
+/*!
+ * @function mfm_claimed_address()
+ *
+ * @brief
+ * Returns whether a pointer belongs to the early allocator.
+ */
+extern bool mfm_claimed_address(void *ptr);
+
+/*!
+ * @function mfm_zone_address()
+ *
+ * @brief
+ * Returns an opaque pointer to the state of the early allocator, to be used
+ * only to pass to introspection functions.
+ */
+extern void *mfm_zone_address(void);
+
+extern const struct malloc_introspection_t mfm_introspect;
+
+#endif // CONFIG_EARLY_MALLOC
+
+#pragma GCC visibility pop
+#endif // __EARLY_MALLOC_H