1SETARCH(8)                 Linux Programmer's Manual                SETARCH(8)
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NAME

6       setarch  -  change reported architecture in new program environment and
7       set personality flags
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SYNOPSIS

10       setarch arch [options] [program [arguments]]
11       arch [options] [program [arguments]]
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DESCRIPTION

14       setarch This utility currently only affects the output of uname -m. For
15       example,  on an AMD64 system, running 'setarch i386 program' will cause
16       'program' to see i686 (or other relevant arch)  instead  of  x86_64  as
17       machine  type.  It  also allows to set various personality options. The
18       default program is /bin/sh.
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OPTIONS

21       -v, --verbose
22              Be verbose.
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24       -h, --help
25              Display help (it is also displayed when setarch takes  no  argu‐
26              ments).
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28       -3, --3gb
29              Specifies  that processes should use a maximum of 3GB of address
30              space on systems where it is supported (ADDR_LIMIT_3GB).
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32       -B, --32bit
33              Turns on ADDR_LIMIT_32BIT.
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35       -F, --fdpic-funcptrs
36              Userspace function  pointers  point  to  descriptors  (turns  on
37              FDPIC_FUNCPTRS).
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39       -I, --short-inode
40              Turns on SHORT_INODE.
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42       -L, --addr-compat-layout
43              Changes  the  way  virtual  memory  is  allocated  (turns on the
44              ADDR_COMPAT_LAYOUT).
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46       -R, --addr-no-randomize
47              Disables randomization of the virtual address  space  (turns  on
48              ADDR_NO_RANDOMIZE).
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50       -S, --whole-seconds
51              Turns on WHOLE_SECONDS.
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53       -T, --sticky-timeouts
54              Turns on STICKY_TIMEOUTS.
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56       -X --read-implies-exec
57              Turns on READ_IMPLIES_EXEC.
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59       -Z, mmap-page-zero
60              Turns on MMAP_PAGE_ZERO.
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EXAMPLES

63       setarch ppc32 rpmbuild --target=ppc --rebuild foo.src.rpm
64       setarch ppc32 -v -vL3 rpmbuild --target=ppc --rebuild bar.src.rpm
65       setarch ppc32 --32bit rpmbuild --target=ppc --rebuild foo.src.rpm
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AUTHOR

68       Elliot Lee <sopwith@redhat.com>
69       Jindrich Novy <jnovy@redhat.com>
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AVAILABILITY

72       The  setarch command is part of the util-linux-ng package and is avail‐
73       able from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.
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77setarch                            Jun 2007                         SETARCH(8)