+++ /dev/null
-.\" Copyright (C) 2010 Intel Corporation
-.\" Author: Andi Kleen
-.\"
-.\" %%%LICENSE_START(VERBATIM)
-.\" Permission is granted to make and distribute verbatim copies of this
-.\" manual provided the copyright notice and this permission notice are
-.\" preserved on all copies.
-.\"
-.\" Permission is granted to copy and distribute modified versions of this
-.\" manual under the conditions for verbatim copying, provided that the
-.\" entire resulting derived work is distributed under the terms of a
-.\" permission notice identical to this one.
-.\"
-.\" Since the Linux kernel and libraries are constantly changing, this
-.\" manual page may be incorrect or out-of-date. The author(s) assume no
-.\" responsibility for errors or omissions, or for damages resulting from
-.\" the use of the information contained herein. The author(s) may not
-.\" have taken the same level of care in the production of this manual,
-.\" which is licensed free of charge, as they might when working
-.\" professionally.
-.\"
-.\" Formatted or processed versions of this manual, if unaccompanied by
-.\" the source, must acknowledge the copyright and authors of this work.
-.\" %%%LICENSE_END
-.\"
-.TH KEXEC_LOAD 2 2014-08-19 "Linux" "Linux Programmer's Manual"
-.SH NAME
-kexec_load \- load a new kernel for later execution
-.SH SYNOPSIS
-.B #include <linux/kexec.h>
-.br
-.BI "long kexec_load(unsigned long " entry ", unsigned long " nr_segments ","
-.br
-.BI " struct kexec_segment *" segments \
-", unsigned long " flags ");"
-
-.IR Note :
-There is no glibc wrapper for this system call; see NOTES.
-.SH DESCRIPTION
-The
-.BR kexec_load ()
-system call loads a new kernel that can be executed later by
-.BR reboot (2).
-.PP
-The
-.I flags
-argument is a bit mask that controls the operation of the call.
-The following values can be specified in
-.IR flags :
-.TP
-.BR KEXEC_ON_CRASH " (since Linux 2.6.13)"
-Execute the new kernel automatically on a system crash.
-.\" FIXME figure out how this is really used
-.TP
-.BR KEXEC_PRESERVE_CONTEXT " (since Linux 2.6.27)"
-Preserve the system hardware and
-software states before executing the new kernel.
-This could be used for system suspend.
-This flag is available only if the kernel was configured with
-.BR CONFIG_KEXEC_JUMP ,
-and is effective only if
-.I nr_segments
-is greater than 0.
-.PP
-The high-order bits (corresponding to the mask 0xffff0000) of
-.I flags
-contain the architecture of the to-be-executed kernel.
-Specify (OR) the constant
-.B KEXEC_ARCH_DEFAULT
-to use the current architecture,
-or one of the following architecture constants
-.BR KEXEC_ARCH_386 ,
-.BR KEXEC_ARCH_68K ,
-.BR KEXEC_ARCH_X86_64 ,
-.BR KEXEC_ARCH_PPC ,
-.BR KEXEC_ARCH_PPC64 ,
-.BR KEXEC_ARCH_IA_64 ,
-.BR KEXEC_ARCH_ARM ,
-.BR KEXEC_ARCH_S390 ,
-.BR KEXEC_ARCH_SH ,
-.BR KEXEC_ARCH_MIPS ,
-and
-.BR KEXEC_ARCH_MIPS_LE .
-The architecture must be executable on the CPU of the system.
-
-The
-.I entry
-argument is the physical entry address in the kernel image.
-The
-.I nr_segments
-argument is the number of segments pointed to by the
-.I segments
-pointer;
-the kernel imposes an (arbitrary) limit of 16 on the number of segments.
-The
-.I segments
-argument is an array of
-.I kexec_segment
-structures which define the kernel layout:
-.in +4n
-.nf
-
-struct kexec_segment {
- void *buf; /* Buffer in user space */
- size_t bufsz; /* Buffer length in user space */
- void *mem; /* Physical address of kernel */
- size_t memsz; /* Physical address length */
-};
-.fi
-.in
-.PP
-.\" FIXME elaborate on the following:
-The kernel image defined by
-.I segments
-is copied from the calling process into previously reserved memory.
-.SH RETURN VALUE
-On success,
-.BR kexec_load ()
-returns 0.
-On error, \-1 is returned and
-.I errno
-is set to indicate the error.
-.SH ERRORS
-.TP
-.B EBUSY
-Another crash kernel is already being loaded
-or a crash kernel is already in use.
-.TP
-.B EINVAL
-.I flags
-is invalid; or
-.IR nr_segments
-is too large
-.\" KEXEC_SEGMENT_MAX == 16
-.TP
-.B EPERM
-The caller does not have the
-.BR CAP_SYS_BOOT
-capability.
-.SH VERSIONS
-The
-.BR kexec_load ()
-system call first appeared in Linux 2.6.13.
-.SH CONFORMING TO
-This system call is Linux-specific.
-.SH NOTES
-Currently, there is no glibc support for
-.BR kexec_load ().
-Call it using
-.BR syscall (2).
-.PP
-The required constants are in the Linux kernel source file
-.IR linux/kexec.h ,
-which is not currently exported to glibc.
-.\" FIXME Andi submitted a patch for this.
-.\" Check if it got accepted later.
-Therefore, these constants must be defined manually.
-
-This system call is available only if the kernel was configured with
-.BR CONFIG_KEXEC .
-.SH SEE ALSO
-.BR reboot (2),
-.BR syscall (2)
projects / thirdparty / man-pages.git / blobdiff