From 2ee0b2d67d8b04dd60a22ec01df1758916b80945 Mon Sep 17 00:00:00 2001
From: kettenis <kettenis@openbsd.org>
Date: Sat, 28 Dec 2013 21:00:21 +0000
Subject: [PATCH] Try to load entropy data from disk:/etc/random.seed.  Then,
 insert this into the ELF openbsd.randomdata of the kernel, so that it has
 entropy right from the start.

---
 sys/arch/sparc64/stand/ofwboot/boot.c       | 30 ++++++++++++++++++++-
 sys/arch/sparc64/stand/ofwboot/elf64_exec.c | 14 +++++++++-
 sys/arch/sparc64/stand/ofwboot/vers.c       |  2 +-
 3 files changed, 43 insertions(+), 3 deletions(-)

diff --git a/sys/arch/sparc64/stand/ofwboot/boot.c b/sys/arch/sparc64/stand/ofwboot/boot.c
index f1eb43e2286..87e0f2f0432 100644
--- a/sys/arch/sparc64/stand/ofwboot/boot.c
+++ b/sys/arch/sparc64/stand/ofwboot/boot.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: boot.c,v 1.19 2013/03/21 21:51:01 deraadt Exp $	*/
+/*	$OpenBSD: boot.c,v 1.20 2013/12/28 21:00:21 kettenis Exp $	*/
 /*	$NetBSD: boot.c,v 1.3 2001/05/31 08:55:19 mrg Exp $	*/
 /*
  * Copyright (c) 1997, 1999 Eduardo E. Horvath.  All rights reserved.
@@ -82,6 +82,8 @@ char bootfile[128];
 int boothowto;
 int debug;
 
+char rnddata[BOOTRANDOM_MAX];
+
 int	elf64_exec(int, Elf64_Ehdr *, u_int64_t *, void **, void **);
 
 #if 0
@@ -260,6 +262,30 @@ loadfile(int fd, char *args)
 	return (rval);
 }
 
+int
+loadrandom(char *path, char *buf, size_t buflen)
+{
+	struct stat sb;
+	int fd, i;
+
+#define O_RDONLY	0
+
+	fd = open(path, O_RDONLY);
+	if (fd == -1)
+		return -1;
+	if (fstat(fd, &sb) == -1 ||
+	    sb.st_uid != 0 ||
+	    (sb.st_mode & (S_IWOTH|S_IROTH)))
+		goto fail;
+	if (read(fd, buf, buflen) != buflen)
+		goto fail;
+	close(fd);
+ 	return 0;
+fail:
+	close(fd);
+	return (-1);
+}
+
 int
 main()
 {
@@ -327,6 +353,8 @@ main()
 				_rtt();
 			}
 		}
+		if (loadrandom(BOOTRANDOM, rnddata, sizeof(rnddata)))
+			printf("open %s: %s\n", opened_name, strerror(errno));
 		if ((fd = open(bootline, 0)) < 0) {
 			printf("open %s: %s\n", opened_name, strerror(errno));
 			continue;
diff --git a/sys/arch/sparc64/stand/ofwboot/elf64_exec.c b/sys/arch/sparc64/stand/ofwboot/elf64_exec.c
index 0597468f9e4..7ac6fcaa07e 100644
--- a/sys/arch/sparc64/stand/ofwboot/elf64_exec.c
+++ b/sys/arch/sparc64/stand/ofwboot/elf64_exec.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: elf64_exec.c,v 1.3 2013/03/21 21:51:01 deraadt Exp $	*/
+/*	$OpenBSD: elf64_exec.c,v 1.4 2013/12/28 21:00:21 kettenis Exp $	*/
 /*	$NetBSD: elfXX_exec.c,v 1.2 2001/08/15 20:08:15 eeh Exp $	*/
 
 /*
@@ -78,6 +78,18 @@ elf64_exec(int fd, Elf_Ehdr *elf, u_int64_t *entryp, void **ssymp, void **esymp)
 			printf("read phdr: %s\n", strerror(errno));
 			return (1);
 		}
+
+		if (phdr.p_type == PT_OPENBSD_RANDOMIZE) {
+			int m, pos;
+
+			/* Fill segment. */
+			for (pos = 0; pos < phdr.p_filesz; pos += m) {
+				m = MIN(phdr.p_filesz - pos, sizeof(rnddata));
+				bcopy(rnddata, (void *)(long)phdr.p_paddr + pos, m);
+			}
+			continue;
+		}
+
 		if (phdr.p_type != PT_LOAD ||
 		    (phdr.p_flags & (PF_W|PF_X)) == 0)
 			continue;
diff --git a/sys/arch/sparc64/stand/ofwboot/vers.c b/sys/arch/sparc64/stand/ofwboot/vers.c
index bcb0d1dbeab..52bef9115ec 100644
--- a/sys/arch/sparc64/stand/ofwboot/vers.c
+++ b/sys/arch/sparc64/stand/ofwboot/vers.c
@@ -1 +1 @@
-const char version[] = "1.5";
+const char version[] = "1.6";
-- 
2.20.1