diff --git a/arch/x86/include/arch/_inttypes.h b/arch/x86/include/arch/_inttypes.h
new file mode 100644
index 0000000..fe7604a
--- /dev/null
+++ b/arch/x86/include/arch/_inttypes.h
@@ -0,0 +1,220 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-NetBSD
+ *
+ * Copyright (c) 2001 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Klaus Klein.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ *	From: $NetBSD: int_fmtio.h,v 1.2 2001/04/26 16:25:21 kleink Exp $
+ * $FreeBSD$
+ */
+
+#pragma once
+
+/*
+ * Macros for format specifiers.
+ */
+
+#ifdef __LP64__
+#define	__PRI64		"l"
+#define	__PRIptr	"l"
+#else
+#define	__PRI64		"ll"
+#define	__PRIptr
+#endif
+
+/* fprintf(3) macros for signed integers. */
+
+#define	PRId8		"d"		/* int8_t */
+#define	PRId16		"d"		/* int16_t */
+#define	PRId32		"d"		/* int32_t */
+#define	PRId64		__PRI64"d"	/* int64_t */
+#define	PRIdLEAST8	"d"		/* int_least8_t */
+#define	PRIdLEAST16	"d"		/* int_least16_t */
+#define	PRIdLEAST32	"d"		/* int_least32_t */
+#define	PRIdLEAST64	__PRI64"d"	/* int_least64_t */
+#define	PRIdFAST8	"d"		/* int_fast8_t */
+#define	PRIdFAST16	"d"		/* int_fast16_t */
+#define	PRIdFAST32	"d"		/* int_fast32_t */
+#define	PRIdFAST64	__PRI64"d"	/* int_fast64_t */
+#define	PRIdMAX		"jd"		/* intmax_t */
+#define	PRIdPTR		__PRIptr"d"	/* intptr_t */
+
+#define	PRIi8		"i"		/* int8_t */
+#define	PRIi16		"i"		/* int16_t */
+#define	PRIi32		"i"		/* int32_t */
+#define	PRIi64		__PRI64"i"	/* int64_t */
+#define	PRIiLEAST8	"i"		/* int_least8_t  */
+#define	PRIiLEAST16	"i"		/* int_least16_t */
+#define	PRIiLEAST32	"i"		/* int_least32_t */
+#define	PRIiLEAST64	__PRI64"i"	/* int_least64_t */
+#define	PRIiFAST8	"i"		/* int_fast8_t */
+#define	PRIiFAST16	"i"		/* int_fast16_t */
+#define	PRIiFAST32	"i"		/* int_fast32_t */
+#define	PRIiFAST64	__PRI64"i"	/* int_fast64_t */
+#define	PRIiMAX		"ji"		/* intmax_t */
+#define	PRIiPTR		__PRIptr"i"	/* intptr_t */
+
+/* fprintf(3) macros for unsigned integers. */
+
+#define	PRIo8		"o"		/* uint8_t */
+#define	PRIo16		"o"		/* uint16_t */
+#define	PRIo32		"o"		/* uint32_t */
+#define	PRIo64		__PRI64"o"	/* uint64_t */
+#define	PRIoLEAST8	"o"		/* uint_least8_t */
+#define	PRIoLEAST16	"o"		/* uint_least16_t */
+#define	PRIoLEAST32	"o"		/* uint_least32_t */
+#define	PRIoLEAST64	__PRI64"o"	/* uint_least64_t */
+#define	PRIoFAST8	"o"		/* uint_fast8_t */
+#define	PRIoFAST16	"o"		/* uint_fast16_t */
+#define	PRIoFAST32	"o"		/* uint_fast32_t */
+#define	PRIoFAST64	__PRI64"o"	/* uint_fast64_t */
+#define	PRIoMAX		"jo"		/* uintmax_t */
+#define	PRIoPTR		__PRIptr"o"	/* uintptr_t */
+
+#define	PRIu8		"u"		/* uint8_t */
+#define	PRIu16		"u"		/* uint16_t */
+#define	PRIu32		"u"		/* uint32_t */
+#define	PRIu64		__PRI64"u"	/* uint64_t */
+#define	PRIuLEAST8	"u"		/* uint_least8_t */
+#define	PRIuLEAST16	"u"		/* uint_least16_t */
+#define	PRIuLEAST32	"u"		/* uint_least32_t */
+#define	PRIuLEAST64	__PRI64"u"	/* uint_least64_t */
+#define	PRIuFAST8	"u"		/* uint_fast8_t */
+#define	PRIuFAST16	"u"		/* uint_fast16_t */
+#define	PRIuFAST32	"u"		/* uint_fast32_t */
+#define	PRIuFAST64	__PRI64"u"	/* uint_fast64_t */
+#define	PRIuMAX		"ju"		/* uintmax_t */
+#define	PRIuPTR		__PRIptr"u"	/* uintptr_t */
+
+#define	PRIx8		"x"		/* uint8_t */
+#define	PRIx16		"x"		/* uint16_t */
+#define	PRIx32		"x"		/* uint32_t */
+#define	PRIx64		__PRI64"x"	/* uint64_t */
+#define	PRIxLEAST8	"x"		/* uint_least8_t */
+#define	PRIxLEAST16	"x"		/* uint_least16_t */
+#define	PRIxLEAST32	"x"		/* uint_least32_t */
+#define	PRIxLEAST64	__PRI64"x"	/* uint_least64_t */
+#define	PRIxFAST8	"x"		/* uint_fast8_t */
+#define	PRIxFAST16	"x"		/* uint_fast16_t */
+#define	PRIxFAST32	"x"		/* uint_fast32_t */
+#define	PRIxFAST64	__PRI64"x"	/* uint_fast64_t */
+#define	PRIxMAX		"jx"		/* uintmax_t */
+#define	PRIxPTR		__PRIptr"x"	/* uintptr_t */
+
+#define	PRIX8		"X"		/* uint8_t */
+#define	PRIX16		"X"		/* uint16_t */
+#define	PRIX32		"X"		/* uint32_t */
+#define	PRIX64		__PRI64"X"	/* uint64_t */
+#define	PRIXLEAST8	"X"		/* uint_least8_t */
+#define	PRIXLEAST16	"X"		/* uint_least16_t */
+#define	PRIXLEAST32	"X"		/* uint_least32_t */
+#define	PRIXLEAST64	__PRI64"X"	/* uint_least64_t */
+#define	PRIXFAST8	"X"		/* uint_fast8_t */
+#define	PRIXFAST16	"X"		/* uint_fast16_t */
+#define	PRIXFAST32	"X"		/* uint_fast32_t */
+#define	PRIXFAST64	__PRI64"X"	/* uint_fast64_t */
+#define	PRIXMAX		"jX"		/* uintmax_t */
+#define	PRIXPTR		__PRIptr"X"	/* uintptr_t */
+
+/* fscanf(3) macros for signed integers. */
+
+#define	SCNd8		"hhd"		/* int8_t */
+#define	SCNd16		"hd"		/* int16_t */
+#define	SCNd32		"d"		/* int32_t */
+#define	SCNd64		__PRI64"d"	/* int64_t */
+#define	SCNdLEAST8	"hhd"		/* int_least8_t */
+#define	SCNdLEAST16	"hd"		/* int_least16_t */
+#define	SCNdLEAST32	"d"		/* int_least32_t */
+#define	SCNdLEAST64	__PRI64"d"	/* int_least64_t */
+#define	SCNdFAST8	"d"		/* int_fast8_t */
+#define	SCNdFAST16	"d"		/* int_fast16_t */
+#define	SCNdFAST32	"d"		/* int_fast32_t */
+#define	SCNdFAST64	__PRI64"d"	/* int_fast64_t */
+#define	SCNdMAX		"jd"		/* intmax_t */
+#define	SCNdPTR		__PRIptr"d"	/* intptr_t */
+
+#define	SCNi8		"hhi"		/* int8_t */
+#define	SCNi16		"hi"		/* int16_t */
+#define	SCNi32		"i"		/* int32_t */
+#define	SCNi64		__PRI64"i"	/* int64_t */
+#define	SCNiLEAST8	"hhi"		/* int_least8_t */
+#define	SCNiLEAST16	"hi"		/* int_least16_t */
+#define	SCNiLEAST32	"i"		/* int_least32_t */
+#define	SCNiLEAST64	__PRI64"i"	/* int_least64_t */
+#define	SCNiFAST8	"i"		/* int_fast8_t */
+#define	SCNiFAST16	"i"		/* int_fast16_t */
+#define	SCNiFAST32	"i"		/* int_fast32_t */
+#define	SCNiFAST64	__PRI64"i"	/* int_fast64_t */
+#define	SCNiMAX		"ji"		/* intmax_t */
+#define	SCNiPTR		__PRIptr"i"	/* intptr_t */
+
+/* fscanf(3) macros for unsigned integers. */
+
+#define	SCNo8		"hho"		/* uint8_t */
+#define	SCNo16		"ho"		/* uint16_t */
+#define	SCNo32		"o"		/* uint32_t */
+#define	SCNo64		__PRI64"o"	/* uint64_t */
+#define	SCNoLEAST8	"hho"		/* uint_least8_t */
+#define	SCNoLEAST16	"ho"		/* uint_least16_t */
+#define	SCNoLEAST32	"o"		/* uint_least32_t */
+#define	SCNoLEAST64	__PRI64"o"	/* uint_least64_t */
+#define	SCNoFAST8	"o"		/* uint_fast8_t */
+#define	SCNoFAST16	"o"		/* uint_fast16_t */
+#define	SCNoFAST32	"o"		/* uint_fast32_t */
+#define	SCNoFAST64	__PRI64"o"	/* uint_fast64_t */
+#define	SCNoMAX		"jo"		/* uintmax_t */
+#define	SCNoPTR		__PRIptr"o"	/* uintptr_t */
+
+#define	SCNu8		"hhu"		/* uint8_t */
+#define	SCNu16		"hu"		/* uint16_t */
+#define	SCNu32		"u"		/* uint32_t */
+#define	SCNu64		__PRI64"u"	/* uint64_t */
+#define	SCNuLEAST8	"hhu"		/* uint_least8_t */
+#define	SCNuLEAST16	"hu"		/* uint_least16_t */
+#define	SCNuLEAST32	"u"		/* uint_least32_t */
+#define	SCNuLEAST64	__PRI64"u"	/* uint_least64_t */
+#define	SCNuFAST8	"u"		/* uint_fast8_t */
+#define	SCNuFAST16	"u"		/* uint_fast16_t */
+#define	SCNuFAST32	"u"		/* uint_fast32_t */
+#define	SCNuFAST64	__PRI64"u"	/* uint_fast64_t */
+#define	SCNuMAX		"ju"		/* uintmax_t */
+#define	SCNuPTR		__PRIptr"u"	/* uintptr_t */
+
+#define	SCNx8		"hhx"		/* uint8_t */
+#define	SCNx16		"hx"		/* uint16_t */
+#define	SCNx32		"x"		/* uint32_t */
+#define	SCNx64		__PRI64"x"	/* uint64_t */
+#define	SCNxLEAST8	"hhx"		/* uint_least8_t */
+#define	SCNxLEAST16	"hx"		/* uint_least16_t */
+#define	SCNxLEAST32	"x"		/* uint_least32_t */
+#define	SCNxLEAST64	__PRI64"x"	/* uint_least64_t */
+#define	SCNxFAST8	"x"		/* uint_fast8_t */
+#define	SCNxFAST16	"x"		/* uint_fast16_t */
+#define	SCNxFAST32	"x"		/* uint_fast32_t */
+#define	SCNxFAST64	__PRI64"x"	/* uint_fast64_t */
+#define	SCNxMAX		"jx"		/* uintmax_t */
+#define	SCNxPTR		__PRIptr"x"	/* uintptr_t */
diff --git a/lib/c/include/inttypes.h b/lib/c/include/inttypes.h
new file mode 100644
index 0000000..e2a57ec
--- /dev/null
+++ b/lib/c/include/inttypes.h
@@ -0,0 +1,65 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2001 Mike Barcroft <mike@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#pragma once
+
+#include <arch/_inttypes.h>
+#include <arch/_types.h>
+
+#include <gay/cdefs.h>
+
+#ifndef	__cplusplus
+#ifndef _WCHAR_T_DECLARED
+typedef	___wchar_t	wchar_t;
+#define	_WCHAR_T_DECLARED
+#endif
+#endif
+
+typedef struct {
+	intmax_t	quot;		/* Quotient. */
+	intmax_t	rem;		/* Remainder. */
+} imaxdiv_t;
+
+/* TODO: these haven't been ported over yet */
+
+/*
+__BEGIN_DECLS
+#ifdef _XLOCALE_H_
+#include <xlocale/_inttypes.h>
+#endif
+intmax_t	imaxabs(intmax_t) __pure2;
+imaxdiv_t	imaxdiv(intmax_t, intmax_t) __pure2;
+
+intmax_t	strtoimax(const char * __restrict, char ** __restrict, int);
+uintmax_t	strtoumax(const char * __restrict, char ** __restrict, int);
+intmax_t	wcstoimax(const wchar_t * __restrict, wchar_t ** __restrict, int);
+uintmax_t	wcstoumax(const wchar_t * __restrict, wchar_t ** __restrict, int);
+__END_DECLS
+*/