9fb80dd57e
Currently we load module sections at whatever alignment gcc+ld happened to dump into the ELF section header which is often less then the page size. Since NX protections are page based this alignment must be rounded up to page size on platforms supporting NX protections. This patch switches EFI platforms to load module sections at 4 KiB page-aligned addresses. It then changes the allocation size computation and the loader code in grub_dl_load_segments() to align the locations and sizes up to these boundaries and fills any added padding with zeros. All of this happens before relocations are applied, so the relocations factor that in with no change. Signed-off-by: Peter Jones <pjones@redhat.com> Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Jan Setje-Eilers <jan.setjeeilers@oracle.com> Signed-off-by: Mate Kukri <mate.kukri@canonical.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. See the file MAINTAINERS for information about the GRUB maintainers, etc. If you found a security vulnerability in the GRUB please check the SECURITY file to get more information how to properly report this kind of bugs to the maintainers. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'