Make the necessary changes so that an ELF kernel can be built. I

have successfully built, booted, and run a number of different ELF
kernel configurations, including GENERIC.  LINT also builds and
links cleanly, though I have not tried to boot it.

The impact on developers is virtually nil, except for two things.
All linker sets that might possibly be present in the kernel must be
listed in "sys/i386/i386/setdefs.h".  And all C symbols that are
also referenced from assembly language code must be listed in
"sys/i386/include/asnames.h".  It so happens that failure to do
these things will have no impact on the a.out kernel.  But it will
break the build of the ELF kernel.

The ELF bootloader works, but it is not ready to commit quite yet.

1 files changed, 23 insertions, 9 deletions

diff --git a/sys/conf/Makefile.i386 b/sys/conf/Makefile.i386
index 15d7cfd96245..d1cacbcf1b95 100644
--- a/sys/conf/Makefile.i386
+++ b/sys/conf/Makefile.i386
@@ -1,7 +1,7 @@
 # Makefile.i386 -- with config changes.
 # Copyright 1990 W. Jolitz
 #	from: @(#)Makefile.i386	7.1 5/10/91
-#	$Id$
+#	$Id: Makefile.i386,v 1.93 1997/02/22 09:31:39 peter Exp $
 #
 # Makefile for FreeBSD
 #
@@ -15,9 +15,9 @@
 #	/sys/i386/conf/Makefile.i386
 # after which config should be rerun for all machines.
 #
-CC?=	cc
-CPP?=	cpp
-LD?=	/usr/bin/ld
+
+BINFORMAT?=	aout
+#BINFORMAT?=	elf
 
 .if exists(./@/.)
 S=	./@
@@ -54,18 +54,26 @@ DRIVER_C_C= ${CC} -c ${CFLAGS} ${PROF} ${PARAM} $<
 DRIVER_S= ${CC} -c -x assembler-with-cpp -DLOCORE ${COPTS} $<
 PROFILE_C= ${CC} -c ${CFLAGS} ${PARAM} $<
 
-SYSTEM_CFILES= ioconf.c param.c vnode_if.c config.c
+SYSTEM_CFILES= ${I386}/i386/setdef0.c ioconf.c param.c vnode_if.c config.c \
+	${I386}/i386/setdef1.c
 SYSTEM_SFILES= ${I386}/i386/locore.s
-SYSTEM_OBJS= locore.o vnode_if.o ${OBJS} ioconf.o param.o config.o
+SYSTEM_OBJS= locore.o setdef0.o vnode_if.o ${OBJS} ioconf.o param.o config.o \
+	setdef1.o
 SYSTEM_DEP= Makefile symbols.exclude symbols.sort ${SYSTEM_OBJS}
-SYSTEM_LD_HEAD= @echo loading $@; rm -f $@
-SYSTEM_LD= @${LD} -Bstatic -Z -T ${LOAD_ADDRESS} -o $@ -X ${SYSTEM_OBJS} vers.o
 .if ${CFLAGS:M-g} == ""
 SYMORDER_EXCLUDE=-x symbols.exclude
 .endif
+SYSTEM_LD_HEAD= @echo loading $@; rm -f $@
+.if ${BINFORMAT} == aout
+SYSTEM_LD= @${LD} -Bstatic -Z -T ${LOAD_ADDRESS} -o $@ -X ${SYSTEM_OBJS} vers.o
 SYSTEM_LD_TAIL= @echo rearranging symbols; \
 	symorder -m ${SYMORDER_EXCLUDE} symbols.sort $@; \
 	size $@; chmod 755 $@
+.endif
+.if ${BINFORMAT} == elf
+SYSTEM_LD= @${LD} -Bstatic -Ttext ${LOAD_ADDRESS} -e btext -o $@ -X ${SYSTEM_OBJS} vers.o
+SYSTEM_LD_TAIL= @size $@; chmod 755 $@
+.endif
 
 %BEFORE_DEPEND
 
@@ -101,6 +109,12 @@ symbols.sort: ${I386}/i386/symbols.raw
 locore.o: ${I386}/i386/locore.s assym.s
 	${NORMAL_S}
 
+setdef0.o: ${I386}/i386/setdef0.c
+	${NORMAL_C}
+
+setdef1.o: ${I386}/i386/setdef1.c
+	${NORMAL_C}
+
 # everything potentially depends on the Makefile since everything potentially
 # depends on the options.  Some things are more dependent on the Makefile for
 # historical reasons.
@@ -134,7 +148,7 @@ depend: assym.s param.c vnode_if.h ${BEFORE_DEPEND}
 	rm -f .newdep
 	mkdep -a -f .newdep ${COPTS} ${CFILES} ${SYSTEM_CFILES}
 	mkdep -a -f .newdep ${COPTS} ${PARAM} -UKERNEL ${I386}/i386/genassym.c
-	MKDEP_CPP="${CPP}" ; export MKDEP_CPP ; \
+	MKDEP_CPP="${CC} -E -x assembler-with-cpp" ; export MKDEP_CPP ; \
 	mkdep -a -f .newdep -DLOCORE ${COPTS} ${SFILES} ${SYSTEM_SFILES}
 	rm -f .depend
 	mv -f .newdep .depend