Integrate zstd into the kernel

Mock userspace headers and include mocked headers first in compilation
command to inject kernel headers and override e.g., malloc(3) with
malloc(9).

Submitted by:	allanjude
Reviewed by:	imp (earlier version), bapt (earlier version)
Differential Revision:	https://reviews.freebsd.org/D10407

7 files changed, 104 insertions, 0 deletions

diff --git a/sys/contrib/zstd/lib/freebsd/stddef.h b/sys/contrib/zstd/lib/freebsd/stddef.h
new file mode 100644
index 000000000000..564c7920975b
--- /dev/null
+++ b/sys/contrib/zstd/lib/freebsd/stddef.h
@@ -0,0 +1,3 @@
+/* This file is in the public domain */
+/* $FreeBSD$ */
+#include "zstd_kfreebsd.h"
diff --git a/sys/contrib/zstd/lib/freebsd/stdint.h b/sys/contrib/zstd/lib/freebsd/stdint.h
new file mode 100644
index 000000000000..564c7920975b
--- /dev/null
+++ b/sys/contrib/zstd/lib/freebsd/stdint.h
@@ -0,0 +1,3 @@
+/* This file is in the public domain */
+/* $FreeBSD$ */
+#include "zstd_kfreebsd.h"
diff --git a/sys/contrib/zstd/lib/freebsd/stdio.h b/sys/contrib/zstd/lib/freebsd/stdio.h
new file mode 100644
index 000000000000..564c7920975b
--- /dev/null
+++ b/sys/contrib/zstd/lib/freebsd/stdio.h
@@ -0,0 +1,3 @@
+/* This file is in the public domain */
+/* $FreeBSD$ */
+#include "zstd_kfreebsd.h"
diff --git a/sys/contrib/zstd/lib/freebsd/stdlib.h b/sys/contrib/zstd/lib/freebsd/stdlib.h
new file mode 100644
index 000000000000..564c7920975b
--- /dev/null
+++ b/sys/contrib/zstd/lib/freebsd/stdlib.h
@@ -0,0 +1,3 @@
+/* This file is in the public domain */
+/* $FreeBSD$ */
+#include "zstd_kfreebsd.h"
diff --git a/sys/contrib/zstd/lib/freebsd/string.h b/sys/contrib/zstd/lib/freebsd/string.h
new file mode 100644
index 000000000000..564c7920975b
--- /dev/null
+++ b/sys/contrib/zstd/lib/freebsd/string.h
@@ -0,0 +1,3 @@
+/* This file is in the public domain */
+/* $FreeBSD$ */
+#include "zstd_kfreebsd.h"
diff --git a/sys/contrib/zstd/lib/freebsd/zstd_kfreebsd.h b/sys/contrib/zstd/lib/freebsd/zstd_kfreebsd.h
new file mode 100644
index 000000000000..af01d4ecf371
--- /dev/null
+++ b/sys/contrib/zstd/lib/freebsd/zstd_kfreebsd.h
@@ -0,0 +1,56 @@
+/*-
+ * Copyright (c) 2014-2015 Allan Jude <allanjude@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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef ZSTD_KFREEBSD_H
+#define ZSTD_KFREEBSD_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef _KERNEL
+#include <sys/param.h>	/* size_t */
+#include <sys/systm.h>	/* memcpy, memset */
+#ifndef BUILDING_ZFS
+#include <sys/stddef.h>	/* ptrdiff_t */
+#endif
+#include <sys/malloc.h>
+
+MALLOC_DECLARE(M_ZSTD);
+
+#define malloc(x)	(malloc)((x), M_ZSTD, M_WAITOK)
+#define free(x)		(free)((x), M_ZSTD)
+/* in zstd's use of calloc, a is always 1 */
+#define calloc(a,b)	(malloc)((a)*(b), M_ZSTD, M_WAITOK | M_ZERO)
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ZSTD_KFREEBSD_H */
diff --git a/sys/contrib/zstd/lib/freebsd/zstd_kmalloc.c b/sys/contrib/zstd/lib/freebsd/zstd_kmalloc.c
new file mode 100644
index 000000000000..c9792a92ef68
--- /dev/null
+++ b/sys/contrib/zstd/lib/freebsd/zstd_kmalloc.c
@@ -0,0 +1,33 @@
+/*-
+ * Copyright (c) 2016-2017 Allan Jude <allanjude@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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+
+MALLOC_DEFINE(M_ZSTD, "zstd", "ZSTD Compressor");