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