stand: compile ia32 EFI loader with -malign-double

The UEFI spec says:
> Structures are aligned on boundaries equal to the largest internal
> datum of the structure and internal data are implicitly padded to
> achieve natural alignment.

Unlike the old Intel EFI toolkit, the EDK2 headers expect ia32 builds to
use -malign-double to achive this.

Make EFI versions of libsa32, liblua32, and ficl32. With the difference
being that they are compiled with -malign-double.

Differential Revision:	https://reviews.freebsd.org/D55385

stand/defs.mk

@@ -78,7 +78,7 @@ LIBSA=		${BOOTOBJ}/libsa/libsa.a
 .if ${MACHINE} == "i386"
 LIBSA32=	${LIBSA}
 .else
-LIBSA32=	${BOOTOBJ}/libsa32/libsa32.a
+LIBSA32=	${BOOTOBJ}/${"${LOADER}" == "loader_ia32":?efi/libsa32efi:libsa32}/libsa32.a
 .endif
 
 # Standard options:

stand/efi/Makefile

@@ -3,12 +3,18 @@ NO_OBJ=t
 .include <bsd.init.mk>
 
 SUBDIR.yes+=	libefi
-SUBDIR.${MK_LOADER_IA32}+=	libefi32
+SUBDIR.${MK_LOADER_IA32}+=	libsa32efi libefi32
 SUBDIR.${MK_FDT}+=	fdt
 SUBDIR.yes+=	.WAIT
 
 SUBDIR.yes+=	boot1 gptboot
 
+.if ${LOADER_DEFAULT_INTERP} == "lua"
+SUBDIR.${MK_LOADER_IA32}+=	liblua32efi
+.elif ${LOADER_DEFAULT_INTERP} == "4th"
+SUBDIR.${MK_LOADER_IA32}+=	ficl32efi
+.endif
+
 SUBDIR.${MK_FORTH}+= loader_4th
 SUBDIR.${MK_LOADER_LUA}+= loader_lua
 SUBDIR.${MK_LOADER_IA32}+= loader_ia32

stand/efi/Makefile.inc

@@ -8,6 +8,11 @@ LDFLAGS+=	-nostdlib
 .if ${MACHINE_CPUARCH} == "amd64"
 CFLAGS+=	-fshort-wchar
 CFLAGS+=	-mno-red-zone
+.if ${DO32:U0} == 1
+# This is needed so the EDK2 EFI structs have the correct layout for
+# the ia32 loader.
+CFLAGS+=	-malign-double
+.endif
 .endif
 
 .if ${MACHINE_CPUARCH} == "aarch64"

stand/efi/ficl32efi/Makefile

@@ -0,0 +1,3 @@
+DO32=1
+
+.include "${.CURDIR}/../../ficl/Makefile"

stand/efi/liblua32efi/Makefile

@@ -0,0 +1,3 @@
+DO32=1
+
+.include "${.CURDIR}/../../liblua/Makefile"

stand/efi/libsa32efi/Makefile

@@ -0,0 +1 @@
+.include "${.CURDIR}/../../libsa32/Makefile"

stand/loader.mk

@@ -162,14 +162,14 @@ LIBFICL=	${BOOTOBJ}/ficl/libficl.a
 .if ${MACHINE} == "i386"
 LIBFICL32=	${LIBFICL}
 .else
-LIBFICL32=	${BOOTOBJ}/ficl32/libficl.a
+LIBFICL32=	${BOOTOBJ}/${"${LOADER}" == "loader_ia32":?efi/ficl32efi:ficl32}/libficl.a
 .endif
 
 LIBLUA=		${BOOTOBJ}/liblua/liblua.a
 .if ${MACHINE} == "i386"
 LIBLUA32=	${LIBLUA}
 .else
-LIBLUA32=	${BOOTOBJ}/liblua32/liblua.a
+LIBLUA32=	${BOOTOBJ}/${"${LOADER}" == "loader_ia32":?efi/liblua32efi:liblua32}/liblua.a
 .endif
 
 CLEANFILES+=	vers.c