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unix: add KexecFileLoad on linux/{amd64,ppc64x,s390x}

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Add a wrapper for the kexec_file_load syscall on the architectures that
implement it (amd64, ppc64x, s390x). See
http://man7.org/linux/man-pages/man2/kexec_file_load.2.html

Change-Id: Ie29f871902176610a6ba7ed0a7bcc95c10eb172b
Reviewed-on: https://go-review.googlesource.com/c/140037
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Tobias Klauser
2018-10-05 13:07:39 +00:00
committed by Tobias Klauser
parent 8469e31483
commit f81de40a84
20 changed files with 341 additions and 0 deletions
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unix/zsyscall_linux_amd64.go
+15
View File
@@ -2296,3 +2296,18 @@ func poll(fds *PollFd, nfds int, timeout int) (n int, err error) {
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(cmdline)
if err != nil {
return
}
_, _, e1 := Syscall6(SYS_KEXEC_FILE_LOAD, uintptr(kernelFd), uintptr(initrdFd), uintptr(cmdlineLen), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}