SETARCH(8)                                          Linux Programmer's Manual                                         SETARCH(8)



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).

       -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.

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 <sopwithATredhat.com>
       Jindrich Novy <jnovyATredhat.com>

AVAILABILITY
       The setarch command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-
       linux-ng/.



setarch                                                     Jun 2007                                                  SETARCH(8)