linux64
change reported architecture in new program environment and set personality flags
Synopsis
setarch
arch [options] [program
[arguments]]
arch [options] [program
[arguments]]
add an example, a script, a trick and tips
examples
setarch ppc32 rpmbuild --target=ppc --rebuild foo.src.rpm
setarch ppc32 -v -vL3 rpmbuild --target=ppc --rebuild
bar.src.rpm
setarch ppc32 --32bit rpmbuild --target=ppc --rebuild foo.src.rpm
description
setarch
This utility currently only affects the output of uname -m.
For example, on an AMD64 system, running ’setarch i386
program’ will cause ’program’ to see
i686 (or other relevant arch) instead of
x86_64 as machine type. It also allows to set various
personality options. The default program is
/bin/sh.
options
-v,
--verbose
Be verbose.
-h,
--help
Display help (it is also
displayed when setarch takes no arguments).
--uname-2.6
Causes the program to see a
kernel version number beginning with 2.6.
-3,
--3gb
Specifies that processes should
use a maximum of 3GB of address space on systems where it is
supported (ADDR_LIMIT_3GB).
-B,
--32bit
Turns on ADDR_LIMIT_32BIT.
-F,
--fdpic-funcptrs
Userspace function pointers
point to descriptors (turns on FDPIC_FUNCPTRS).
-I,
--short-inode
Turns on SHORT_INODE.
-L,
--addr-compat-layout
Changes the way virtual memory
is allocated (turns on the ADDR_COMPAT_LAYOUT).
-R,
--addr-no-randomize
Disables randomization of the
virtual address space (turns on ADDR_NO_RANDOMIZE).
-S,
--whole-seconds
Turns on WHOLE_SECONDS.
-T,
--sticky-timeouts
Turns on STICKY_TIMEOUTS.
-X
--read-implies-exec
Turns on READ_IMPLIES_EXEC.
-Z,
mmap-page-zero
Turns on MMAP_PAGE_ZERO.
availability
The setarch command is part of the util-linux package and is
available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
author
Elliot Lee
<sopwith[:at:]redhat[:dot:]com>
Jindrich Novy <jnovy[:at:]redhat[:dot:]com>