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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  personal-
       ity options. The default program is /bin/sh.

OPTIONS
       -v     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     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 AT redhat.com>
       Jindrich Novy <jnovy AT redhat.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)

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