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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 <a href="ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/" title="ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/">ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/</a>. setarch Jun 2007 SETARCH(8)