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authorUwe Hermann <uwe@hermann-uwe.de>2008-04-07 23:33:50 +0000
committerUwe Hermann <uwe@hermann-uwe.de>2008-04-07 23:33:50 +0000
commit4eb5089821b014d84fac2ef432da0f7bbaba754e (patch)
tree2bc6f29c9ee05044f3d75f8c890965ffed89053c /payloads
parentc6092c0f34cde338dcce2cd61cdee8826b4c1a59 (diff)
Add rand/rand_r/srand functions for generating pseudo-random bytes.
Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de> Acked-by: Jordan Crouse <jordan.crouse@amd.com> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3222 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'payloads')
-rw-r--r--payloads/libpayload/LICENSES6
-rw-r--r--payloads/libpayload/include/libpayload.h2
-rw-r--r--payloads/libpayload/libc/Makefile.inc1
-rw-r--r--payloads/libpayload/libc/rand.c52
4 files changed, 61 insertions, 0 deletions
diff --git a/payloads/libpayload/LICENSES b/payloads/libpayload/LICENSES
index d81eb72636..191ad79950 100644
--- a/payloads/libpayload/LICENSES
+++ b/payloads/libpayload/LICENSES
@@ -66,6 +66,12 @@ holders, and the exact license terms that apply.
Original files: lib/libalias/alias_util.c, function LibAliasInternetChecksum()
Current version we use: CVS revision 1.15 2004/07/06 12:13:28
+* libc/rand.c: 3-clause BSD license
+ Source: OpenBSD
+ http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdlib/rand.c
+ Original files: src/lib/libc/stdlib/rand.c
+ Current version we use: CVS revision 1.9 2005/8/8 08:05:37
+
* libc/memory.c: 3-clause BSD license
Source: HelenOS, http://www.helenos.eu
svn checkout svn://svn.helenos.eu/HelenOS/trunk HelenOS
diff --git a/payloads/libpayload/include/libpayload.h b/payloads/libpayload/include/libpayload.h
index 2cdb0d00f6..b74fbfeab2 100644
--- a/payloads/libpayload/include/libpayload.h
+++ b/payloads/libpayload/include/libpayload.h
@@ -53,6 +53,8 @@
#define BYTE_ORDER BIG_ENDIAN
#endif
+#define RAND_MAX 0x7fffffff
+
/* Some NVRAM byte definitions */
#define NVRAM_RTC_SECONDS 0
#define NVRAM_RTC_MINUTES 2
diff --git a/payloads/libpayload/libc/Makefile.inc b/payloads/libpayload/libc/Makefile.inc
index ee64b60644..44975a6a14 100644
--- a/payloads/libpayload/libc/Makefile.inc
+++ b/payloads/libpayload/libc/Makefile.inc
@@ -29,3 +29,4 @@
TARGETS-y += libc/malloc.o libc/printf.o libc/console.o libc/string.o
TARGETS-y += libc/memory.o libc/ctype.o libc/ipchecksum.o libc/lib.o
+TARGETS-y += libc/rand.o
diff --git a/payloads/libpayload/libc/rand.c b/payloads/libpayload/libc/rand.c
new file mode 100644
index 0000000000..d490809119
--- /dev/null
+++ b/payloads/libpayload/libc/rand.c
@@ -0,0 +1,52 @@
+/*
+ * This file is part of the libpayload project.
+ *
+ * It was originally taken from the OpenBSD project.
+ *
+ * Copyright (c) 1990 The Regents of the University of California.
+ * 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.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#include <libpayload.h>
+
+static unsigned int next = 1;
+
+int rand_r(unsigned int *seed)
+{
+ *seed = *seed * 1103515245 + 12345;
+ return (*seed % ((unsigned int)RAND_MAX + 1));
+}
+
+int rand(void)
+{
+ return (rand_r(&next));
+}
+
+void srand(unsigned int seed)
+{
+ next = seed;
+}