From 9aaf88c0004f0d9856947aad7d618fb84d5dba40 Mon Sep 17 00:00:00 2001
From: "Dmitry V. Levin" <ldv@altlinux.org>
Date: Wed, 5 Feb 2014 14:51:19 +0000
Subject: [PATCH] Enhance reboot decoding

* linux/reboot.h: New file.
* system.c (bootflags1, bootflags2, bootflags3, sys_reboot): Move...
* reboot.c: ... here.
(bootflags2, bootflags3): Update constants.
* Makefile.am (strace_SOURCES): Add reboot.c.
(EXTRA_DIST): Add linux/reboot.h.
---
 Makefile.am    |  2 ++
 linux/reboot.h | 39 +++++++++++++++++++++++++++++++++++++++
 reboot.c       | 45 +++++++++++++++++++++++++++++++++++++++++++++
 system.c       | 40 ----------------------------------------
 4 files changed, 86 insertions(+), 40 deletions(-)
 create mode 100644 linux/reboot.h
 create mode 100644 reboot.c

diff --git a/Makefile.am b/Makefile.am
index 55cd4ccd..5524293f 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -34,6 +34,7 @@ strace_SOURCES =	\
 	process.c	\
 	ptp.c		\
 	quota.c		\
+	reboot.c	\
 	resource.c	\
 	scsi.c		\
 	signal.c	\
@@ -137,6 +138,7 @@ EXTRA_DIST =				\
 	linux/powerpc/syscallent.h	\
 	linux/powerpc/syscallent1.h	\
 	linux/ptp_clock.h		\
+	linux/reboot.h			\
 	linux/s390/ioctlent.h.in	\
 	linux/s390/syscallent.h		\
 	linux/s390x/ioctlent.h.in	\
diff --git a/linux/reboot.h b/linux/reboot.h
new file mode 100644
index 00000000..aa336741
--- /dev/null
+++ b/linux/reboot.h
@@ -0,0 +1,39 @@
+#ifndef _LINUX_REBOOT_H
+#define _LINUX_REBOOT_H
+
+/*
+ * Magic values required to use _reboot() system call.
+ */
+
+#define	LINUX_REBOOT_MAGIC1	0xfee1dead
+#define	LINUX_REBOOT_MAGIC2	672274793
+#define	LINUX_REBOOT_MAGIC2A	85072278
+#define	LINUX_REBOOT_MAGIC2B	369367448
+#define	LINUX_REBOOT_MAGIC2C	537993216
+
+
+/*
+ * Commands accepted by the _reboot() system call.
+ *
+ * RESTART     Restart system using default command and mode.
+ * HALT        Stop OS and give system control to ROM monitor, if any.
+ * CAD_ON      Ctrl-Alt-Del sequence causes RESTART command.
+ * CAD_OFF     Ctrl-Alt-Del sequence sends SIGINT to init task.
+ * POWER_OFF   Stop OS and remove all power from system, if possible.
+ * RESTART2    Restart system using given command string.
+ * SW_SUSPEND  Suspend system using software suspend if compiled in.
+ * KEXEC       Restart system using a previously loaded Linux kernel
+ */
+
+#define	LINUX_REBOOT_CMD_RESTART	0x01234567
+#define	LINUX_REBOOT_CMD_HALT		0xCDEF0123
+#define	LINUX_REBOOT_CMD_CAD_ON		0x89ABCDEF
+#define	LINUX_REBOOT_CMD_CAD_OFF	0x00000000
+#define	LINUX_REBOOT_CMD_POWER_OFF	0x4321FEDC
+#define	LINUX_REBOOT_CMD_RESTART2	0xA1B2C3D4
+#define	LINUX_REBOOT_CMD_SW_SUSPEND	0xD000FCE2
+#define	LINUX_REBOOT_CMD_KEXEC		0x45584543
+
+
+
+#endif /* _LINUX_REBOOT_H */
diff --git a/reboot.c b/reboot.c
new file mode 100644
index 00000000..f8c3de7a
--- /dev/null
+++ b/reboot.c
@@ -0,0 +1,45 @@
+#include "defs.h"
+#include <linux/reboot.h>
+
+static const struct xlat bootflags1[] = {
+	XLAT(LINUX_REBOOT_MAGIC1),
+	XLAT_END
+};
+
+static const struct xlat bootflags2[] = {
+	XLAT(LINUX_REBOOT_MAGIC2),
+	XLAT(LINUX_REBOOT_MAGIC2A),
+	XLAT(LINUX_REBOOT_MAGIC2B),
+	XLAT(LINUX_REBOOT_MAGIC2C),
+	XLAT_END
+};
+
+static const struct xlat bootflags3[] = {
+	XLAT(LINUX_REBOOT_CMD_RESTART),
+	XLAT(LINUX_REBOOT_CMD_HALT),
+	XLAT(LINUX_REBOOT_CMD_CAD_ON),
+	XLAT(LINUX_REBOOT_CMD_CAD_OFF),
+	XLAT(LINUX_REBOOT_CMD_POWER_OFF),
+	XLAT(LINUX_REBOOT_CMD_RESTART2),
+	XLAT(LINUX_REBOOT_CMD_SW_SUSPEND),
+	XLAT(LINUX_REBOOT_CMD_KEXEC),
+	XLAT_END
+};
+
+int
+sys_reboot(struct tcb *tcp)
+{
+	if (exiting(tcp))
+		return 0;
+
+	printflags(bootflags1, tcp->u_arg[0], "LINUX_REBOOT_MAGIC_???");
+	tprints(", ");
+	printflags(bootflags2, tcp->u_arg[1], "LINUX_REBOOT_MAGIC_???");
+	tprints(", ");
+	printflags(bootflags3, tcp->u_arg[2], "LINUX_REBOOT_CMD_???");
+	if (tcp->u_arg[2] == LINUX_REBOOT_CMD_RESTART2) {
+		tprints(", ");
+		printstr(tcp, tcp->u_arg[3], -1);
+	}
+	return 0;
+}
diff --git a/system.c b/system.c
index b4e1896a..604988b5 100644
--- a/system.c
+++ b/system.c
@@ -275,46 +275,6 @@ sys_syslog(struct tcb *tcp)
 	return 0;
 }
 
-#include <linux/reboot.h>
-static const struct xlat bootflags1[] = {
-	XLAT(LINUX_REBOOT_MAGIC1),
-	XLAT_END
-};
-
-static const struct xlat bootflags2[] = {
-	XLAT(LINUX_REBOOT_MAGIC2),
-	XLAT(LINUX_REBOOT_MAGIC2A),
-	XLAT(LINUX_REBOOT_MAGIC2B),
-	XLAT_END
-};
-
-static const struct xlat bootflags3[] = {
-	XLAT(LINUX_REBOOT_CMD_CAD_OFF),
-	XLAT(LINUX_REBOOT_CMD_RESTART),
-	XLAT(LINUX_REBOOT_CMD_HALT),
-	XLAT(LINUX_REBOOT_CMD_CAD_ON),
-	XLAT(LINUX_REBOOT_CMD_POWER_OFF),
-	XLAT(LINUX_REBOOT_CMD_RESTART2),
-	XLAT_END
-};
-
-int
-sys_reboot(struct tcb *tcp)
-{
-	if (entering(tcp)) {
-		printflags(bootflags1, tcp->u_arg[0], "LINUX_REBOOT_MAGIC_???");
-		tprints(", ");
-		printflags(bootflags2, tcp->u_arg[1], "LINUX_REBOOT_MAGIC_???");
-		tprints(", ");
-		printflags(bootflags3, tcp->u_arg[2], "LINUX_REBOOT_CMD_???");
-		if (tcp->u_arg[2] == LINUX_REBOOT_CMD_RESTART2) {
-			tprints(", ");
-			printstr(tcp, tcp->u_arg[3], -1);
-		}
-	}
-	return 0;
-}
-
 #ifdef M68K
 static const struct xlat cacheflush_scope[] = {
 #ifdef FLUSH_SCOPE_LINE