setarch - Unix, Linux Command

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

Tag	Description
-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