Also introduce reboot() for starting already loaded
via kexec ELF segments.
Signed-off-by: Antony Pavlov <antonynpavlov@xxxxxxxxx>
---
include/linux/reboot.h | 14 ++++++++++++++
lib/kexec/Makefile | 1 +
lib/kexec/kexec-bootm-elf.c | 36 ++++++++++++++++++++++++++++++++++++
3 files changed, 51 insertions(+)
create mode 100644 include/linux/reboot.h
create mode 100644 lib/kexec/kexec-bootm-elf.c
diff --git a/include/linux/reboot.h b/include/linux/reboot.h
new file mode 100644
index 0000000..454ed33
--- /dev/null
+++ b/include/linux/reboot.h
@@ -0,0 +1,14 @@
+#ifndef _LINUX_REBOOT_H
+#define _LINUX_REBOOT_H
+
+/*
+ * Commands accepted by the _reboot() system call.
+ *
+ * KEXEC Restart system using a previously loaded Linux kernel
+ */
+
+#define LINUX_REBOOT_CMD_KEXEC 0x45584543
+
+extern int reboot(int cmd);
+
+#endif /* _LINUX_REBOOT_H */
diff --git a/lib/kexec/Makefile b/lib/kexec/Makefile
index 8febef1..2f3dc1d 100644
--- a/lib/kexec/Makefile
+++ b/lib/kexec/Makefile
@@ -1,3 +1,4 @@
obj-y += kexec.o
obj-y += kexec-elf.o
obj-y += kexec-elf-exec.o
+obj-y += kexec-bootm-elf.o
diff --git a/lib/kexec/kexec-bootm-elf.c b/lib/kexec/kexec-bootm-elf.c
new file mode 100644
index 0000000..6c8071a
--- /dev/null
+++ b/lib/kexec/kexec-bootm-elf.c
@@ -0,0 +1,36 @@
+#include <boot.h>
+#include <init.h>
+#include <binfmt.h>
+#include <errno.h>
+#include <linux/reboot.h>
+
+#include "kexec.h"
+
+static int do_bootm_elf(struct image_data *data)
+{
+ kexec_load_file(data->os_file, 0);
+ setenv("global.bootm.image", data->os_file);
+ reboot(LINUX_REBOOT_CMD_KEXEC);
+
+ return -ERESTARTSYS;
+}
+
+static struct image_handler elf_handler = {
+ .name = "ELF",
+ .bootm = do_bootm_elf,
+ .filetype = filetype_elf,
+};
+
+static struct binfmt_hook binfmt_elf_hook = {
+ .type = filetype_elf,
+ .exec = "bootm",
+};
+
+static int elf_register_image_handler(void)
+{
+ register_image_handler(&elf_handler);
+ binfmt_register(&binfmt_elf_hook);
+
+ return 0;
+}
+late_initcall(elf_register_image_handler);
--
1.9.0
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