NAME¶

setarch - change reported architecture in new program environment and set personality flags

SYNOPSIS¶

setarch <arch> [options] [program [arguments]]
arch [options] [program [arguments]]

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).

-V, --version

Output version information and exit.

--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).

--4gb

Ignored (for backward compatibility only).

--list

List architectures that can be set.

-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.

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

AUTHOR¶

Elliot Lee
Jindrich Novy

AVAILABILITY¶

The setarch command is part of the util-linux package and is available from Linux Kernel Archive.