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[PATCH v3] add kexec_load() syscall
- From: maximilian attems <max at stro dot at>
- To: libc-alpha at sourceware dot org
- Cc: Andreas Jaeger <aj at suse dot com>,maximilian attems <max at stro dot at>
- Date: Wed, 23 May 2012 12:56:57 +0200
- Subject: [PATCH v3] add kexec_load() syscall
Sucessfully built tested on x86_64 and call is available
thanks to input from Andreas Jaeger <aj@suse.com>
Motivation is to axe the syscall maze in kexec-tools itself and
have this syscall supported in glibc for installers or other
interested projects (kexecboot, ..).
ChangeLog:
2012-05-23 maximilian attems <max@stro.at>
Andreas Jaeger <aj@suse.com>
* sysdeps/unix/sysv/linux/syscalls.list: Add kexec_load syscall.
* sysdeps/unix/sysv/linux/sys/kexec.h: New file.
* sysdeps/unix/sysv/linux/Makefile: Add kexec.h.
---
sysdeps/unix/sysv/linux/Makefile | 2 +-
sysdeps/unix/sysv/linux/sys/kexec.h | 50 +++++++++++++++++++++++++++++++++
sysdeps/unix/sysv/linux/syscalls.list | 1 +
3 files changed, 52 insertions(+), 1 deletion(-)
create mode 100644 sysdeps/unix/sysv/linux/sys/kexec.h
diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index 70fd137..8155aba 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -36,7 +36,7 @@ sysdep_headers += sys/mount.h sys/acct.h sys/sysctl.h \
bits/a.out.h sys/inotify.h sys/signalfd.h sys/eventfd.h \
sys/timerfd.h sys/fanotify.h bits/eventfd.h bits/inotify.h \
bits/signalfd.h bits/timerfd.h bits/epoll.h \
- bits/socket_type.h bits/syscall.h
+ bits/socket_type.h bits/syscall.h sys/kexec.h
tests += tst-clone
diff --git a/sysdeps/unix/sysv/linux/sys/kexec.h b/sysdeps/unix/sysv/linux/sys/kexec.h
new file mode 100644
index 0000000..1f1d89d
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sys/kexec.h
@@ -0,0 +1,50 @@
+/* Copyright (C) 2012 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+/* This file should define kexec structs to be used
+ in the argument to the `kexec_load' system call. */
+
+#ifndef _SYS_KEXEC_H
+#define _SYS_KEXEC_H 1
+
+#include <features.h>
+#include <sys/types.h>
+
+/* This structure is used to hold the arguments that are used when
+ loading kernel binaries. */
+
+struct kexec_segment {
+ const void *buf;
+ size_t bufsz;
+ const void *mem;
+ size_t memsz;
+};
+
+__BEGIN_DECLS
+
+/* kexec interface function
+ __entry - memory location of the new kimage
+ __nr_segments - number of kexec_segments
+ __segments - segments to be read
+ __flags - kexec flags */
+extern long int kexec_load(void *__entry, unsigned long __nr_segments,
+ struct kexec_segment *__segments,
+ unsigned long __flags) __THROW;
+
+__END_DECLS
+
+#endif /* _SYS_KEXEC_H */
diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list
index eef6d82..e530b19 100644
--- a/sysdeps/unix/sysv/linux/syscalls.list
+++ b/sysdeps/unix/sysv/linux/syscalls.list
@@ -33,6 +33,7 @@ inotify_init1 EXTRA inotify_init1 i:I inotify_init1
inotify_rm_watch EXTRA inotify_rm_watch i:ii inotify_rm_watch
ioperm - ioperm i:iii ioperm
iopl - iopl i:i iopl
+kexec_load EXTRA kexec_load i:pipi kexec_load
klogctl EXTRA syslog i:isi klogctl
lchown - lchown i:sii __lchown lchown
madvise - madvise i:pii madvise
--
1.7.10