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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     Be verbose.

       -h, --help
              Display help (it is also displayed when setarch takes  no  argu-
              ments).

       -3, --3gb
              Specifies  that processes should use a maximum of 3GB of address
              space on systems where it is supported (ADDR_LIMIT_3GB).

       -B     Turns on ADDR_LIMIT_32BIT.

       -F     Userspace function  pointers  point  to  descriptors  (turns  on
              FDPIC_FUNCPTRS).

       -I     Turns on SHORT_INODE.

       -L     Changes  the  way  virtual  memory  is  allocated  (turns on the
              ADDR_COMPAT_LAYOUT).

       -R     Disables randomization of the virtual address  space  (turns  on
              ADDR_NO_RANDOMIZE).

       -S     Turns on WHOLE_SECONDS.

       -T     Turns on STICKY_TIMEOUTS.

       -X     Turns on READ_IMPLIES_EXEC.

       -Z     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

AUTHOR
       Elliot Lee <sopwith@redhat.com>
       Jindrich Novy <jnovy@redhat.com>

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

setarch                            Jun 2007                         SETARCH(8)

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