* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
*/
-FILE_LICENCE ( GPL2_OR_LATER );
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <errno.h>
#include <elf.h>
return -ECANCELED; /* -EIMPOSSIBLE, anyone? */
}
+/**
+ * Check that ELF segment uses flat physical addressing
+ *
+ * @v image ELF file
+ * @v phdr ELF program header
+ * @v dest Destination address
+ * @ret rc Return status code
+ */
+static int elfboot_check_segment ( struct image *image, Elf_Phdr *phdr,
+ physaddr_t dest ) {
+
+ /* Check that ELF segment uses flat physical addressing */
+ if ( phdr->p_vaddr != dest ) {
+ DBGC ( image, "ELF %p uses virtual addressing (phys %x, "
+ "virt %x)\n", image, phdr->p_paddr, phdr->p_vaddr );
+ return -ENOEXEC;
+ }
+
+ return 0;
+}
+
/**
* Probe ELF image
*
[EI_DATA] = ELFDATA2LSB,
[EI_VERSION] = EV_CURRENT,
};
+ physaddr_t entry;
+ physaddr_t max;
+ int rc;
/* Read ELF header */
copy_from_user ( &ehdr, image->data, 0, sizeof ( ehdr ) );
if ( memcmp ( ehdr.e_ident, e_ident, sizeof ( e_ident ) ) != 0 ) {
- DBG ( "Invalid ELF identifier\n" );
+ DBGC ( image, "Invalid ELF identifier\n" );
return -ENOEXEC;
}
+ /* Check that this image uses flat physical addressing */
+ if ( ( rc = elf_segments ( image, &ehdr, elfboot_check_segment,
+ &entry, &max ) ) != 0 ) {
+ DBGC ( image, "Unloadable ELF image\n" );
+ return rc;
+ }
+
return 0;
}