[Buildroot] [RFC, PATCH 5/8] package/kexec-lite: Add a package for the kexec-lite tools

[Jeremy Kerr <jk@ozlabs.org>]

Kexec-lite is a tiny impementation of kexec for devicetree-based
platforms.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

---
 package/Config.in                                 |    1 
 package/kexec-lite/Config.in                      |    9 +++
 package/kexec-lite/kexec-lite-clean-restart.patch |   34 ++++++++++++++
 package/kexec-lite/kexec-lite.mk                  |   20 ++++++++
 4 files changed, 64 insertions(+)

diff --git a/package/Config.in b/package/Config.in
index 61f4c9e0..f5161475 100644
--- a/package/Config.in
+++ b/package/Config.in
@@ -52,6 +52,7 @@ source "package/fio/Config.in"
 source "package/gdb/Config.in"
 source "package/iozone/Config.in"
 source "package/kexec/Config.in"
+source "package/kexec-lite/Config.in"
 source "package/ktap/Config.in"
 source "package/latencytop/Config.in"
 source "package/lmbench/Config.in"
diff --git a/package/kexec-lite/Config.in b/package/kexec-lite/Config.in
new file mode 100644
index 00000000..0dc05155
--- /dev/null
+++ b/package/kexec-lite/Config.in
@@ -0,0 +1,9 @@
+config BR2_PACKAGE_KEXEC_LITE
+	bool "kexec-lite"
+	depends on BR2_powerpc
+	select BR2_PACKAGE_LIBELF
+	select BR2_PACKAGE_DTC
+	select BR2_PACKAGE_DTC_PROGRAMS
+	help
+	  Kexec is a user space utiltity for loading another kernel
+	  and asking the currently running kernel to do something with it.
diff --git a/package/kexec-lite/kexec-lite-clean-restart.patch b/package/kexec-lite/kexec-lite-clean-restart.patch
new file mode 100644
index 00000000..faaa93a0
--- /dev/null
+++ b/package/kexec-lite/kexec-lite-clean-restart.patch
@@ -0,0 +1,34 @@
+From 0a654c20e1b9324c57ba4116b52fb6ab33847e1d Mon Sep 17 00:00:00 2001
+From: Jeremy Kerr <jk@ozlabs.org>
+Date: Thu, 8 Aug 2013 17:16:31 +0800
+Subject: [PATCH] kexec: Implement clean restart for busybox init
+
+Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
+---
+ kexec.c |    3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/kexec.c b/kexec.c
+index 2edb7df..b2a0c42 100644
+--- a/kexec.c
++++ b/kexec.c
+@@ -27,6 +27,7 @@
+ #include <fcntl.h>
+ #include <errno.h>
+ #include <syscall.h>
++#include <signal.h>
+ #include <libfdt.h>
+ #include <getopt.h>
+ #include <sys/types.h>
+@@ -818,7 +819,7 @@ int main(int argc, char *argv[])
+ 			sync();
+ 			exec_kexec();
+ 		} else {
+-			execlp("shutdown", "shutdown", "-r", "now", NULL);
++			kill(1, SIGQUIT);
+ 		}
+ 
+ 		return -1;
+-- 
+1.7.10.4
+
diff --git a/package/kexec-lite/kexec-lite.mk b/package/kexec-lite/kexec-lite.mk
new file mode 100644
index 00000000..4d844f43
--- /dev/null
+++ b/package/kexec-lite/kexec-lite.mk
@@ -0,0 +1,20 @@
+################################################################################
+#
+# kexec
+#
+################################################################################
+
+KEXEC_LITE_VERSION = 6c762a7
+KEXEC_LITE_SITE = git://github.com/antonblanchard/kexec-lite
+KEXEC_LITE_LICENSE = GPL
+KEXEC_LITE_DEPENDENCIES = libelf dtc
+
+define KEXEC_LITE_BUILD_CMDS
+	$(MAKE) CC="$(TARGET_CC)" LD="$(TARGET_LD)" -C $(@D) all
+endef
+
+define KEXEC_LITE_INSTALL_TARGET_CMDS
+	$(INSTALL) -D -m 755 $(@D)/kexec $(TARGET_DIR)/usr/sbin/
+endef
+
+$(eval $(generic-package))