tree d153de42617f0bcfc783da793caa39487e26b39e
parent 8ec89a2afd6c4c848c80bd7447293412b5d5b07c
author Luca Boccassi <luca.boccassi@microsoft.com> 1557858902 +0100
committer Tom Rini <trini@konsulko.com> 1558197122 -0400

tools: use read-only mmap in fit_check_sign

Add an option to open files in read-only mode in mmap_fdt so
that fit_check_sign can be used to inspect files on read-only
filesystems.
For example, this is useful when a key is shipped in a read-only
rootfs or squashfs.

Signed-off-by: Luca Boccassi <luca.boccassi@microsoft.com>