x86_64(8) - Linux man page

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.

Options

-v
Be verbose.
-h, "--help"
Display help (it is also displayed when setarch takes no arguments).
-3
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>

Bugs

Report bugs via http://bugzilla.redhat.com/bugzilla/