linux64

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  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, --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-ng package and is avail‐
       able from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.



setarch                            Jun 2007                         SETARCH(8)