memtest: Support arch-specific and EFI memtest86+ 6.00

- BIOS: Final filename doesn't change (memtest), but now uses a
  64-bit version on amd64.
- EFI: Now included as memtest.efi; 32-bit on i386, 64-bit on amd64.
  As it's GRUB-only, we can test for the existence of memtest.efi
  (6.00+ only) in GRUB itself.
- Add @MEMTEST_DIR@ to facilitate directory-based testing in GRUB.

This expands upon the previous MVP commit
15e78a3eec .

scripts/build/binary_grub_cfg

@@ -231,7 +231,8 @@ else
 fi
 
 # Assembling memtest configuration
-MEMTEST_BIN="/${INITFS}/memtest"
+MEMTEST_DIR="/${INITFS}"
+MEMTEST_BIN="${MEMTEST_DIR}/memtest"
 if [ -f "binary/${MEMTEST_BIN}" ]; then
 	ENABLE_MEMTEST="true"
 	MEMTEST="source /boot/grub/memtest.cfg" #for backwards compatibility
@@ -261,6 +262,7 @@ sed -i \
     -e "s|@APPEND_INSTALL@|${LB_BOOTAPPEND_INSTALL}|" \
     -e "s|@ENABLE_INSTALL_MENU@|${ENABLE_INSTALL_MENU}|" \
     -e "s|@ENABLE_MEMTEST@|${ENABLE_MEMTEST}|" \
+    -e "s|@MEMTEST_DIR@|${MEMTEST_DIR}|" \
     -e "s|@MEMTEST_BIN@|${MEMTEST_BIN}|" \
     -e "s|@MEMTEST_VERSION@|${LB_MEMTEST}|" \
     -e "s|@FLAVOUR_LIVE@|${FLAVOUR_LIVE}|" \

scripts/build/binary_memtest

@@ -75,12 +75,20 @@ Install_packages
 
 case "${LB_MEMTEST}" in
 	memtest86+)
+		case "${LB_ARCHITECTURE}" in
+			amd64)
+				_MEMTEST_ARCH=x64
+				;;
+			i386)
+				_MEMTEST_ARCH=x32
+				;;
+		esac
 		case "${LB_BUILD_WITH_CHROOT}" in
 			true)
-				[ -e "chroot/boot/${LB_MEMTEST}x32.bin" ] && _MEMTEST_BIN="${LB_MEMTEST}x32"
+				[ -e "chroot/boot/${LB_MEMTEST}${_MEMTEST_ARCH}.bin" ] && _MEMTEST_BIN="${LB_MEMTEST}${_MEMTEST_ARCH}"
 				;;
 			false)
-				[ -e "/boot/${LB_MEMTEST}x32.bin" ] && _MEMTEST_BIN="${LB_MEMTEST}x32"
+				[ -e "/boot/${LB_MEMTEST}${_MEMTEST_ARCH}.bin" ] && _MEMTEST_BIN="${LB_MEMTEST}${_MEMTEST_ARCH}"
 				;;
 		esac
 		;;
@@ -104,10 +112,12 @@ mkdir -p "${DESTDIR}"
 case "${LB_BUILD_WITH_CHROOT}" in
 	true)
 		cp -a "chroot/boot/${_MEMTEST_BIN}.bin" "${DESTDIR}"/memtest
+		[ -e "chroot/boot/${_MEMTEST_BIN}.efi" ] && cp -a "chroot/boot/${_MEMTEST_BIN}.efi" "${DESTDIR}"/memtest.efi
 		;;
 
 	false)
 		cp -a "/boot/${_MEMTEST_BIN}.bin" "${DESTDIR}"/memtest
+		[ -e "/boot/${_MEMTEST_BIN}.efi" ] && cp -a "/boot/${_MEMTEST_BIN}.efi" "${DESTDIR}"/memtest.efi
 		;;
 esac
 

share/bootloaders/grub-pc/grub.cfg

@@ -36,7 +36,7 @@ submenu 'Utilities...' --hotkey=u {
 	source /boot/grub/theme.cfg
 
 	# Memtest (if any)
-	if [ "${grub_platform}" = "pc" ] -a @ENABLE_MEMTEST@; then
+	if @ENABLE_MEMTEST@; then
 		source /boot/grub/memtest.cfg
 	fi
 

share/bootloaders/grub-pc/memtest.cfg

@@ -1,3 +1,10 @@
-menuentry "Memory Diagnostic Tool (@MEMTEST_VERSION@)" --hotkey=m {
-	linux16 @MEMTEST_BIN@
-}
+if [ "${grub_platform}" = "pc" ]; then
+	menuentry "Memory Diagnostic Tool (@MEMTEST_VERSION@)" --hotkey=m {
+		linux16 @MEMTEST_BIN@
+	}
+elif [ "${grub_platform}" = "efi" ] -a [ -e @MEMTEST_DIR@/memtest.efi ]; then
+	menuentry "Memory Diagnostic Tool (@MEMTEST_VERSION@)" --hotkey=m {
+		insmod chain
+		chainloader @MEMTEST_DIR@/memtest.efi
+	}
+fi