kbuild: Fix 'make some/dir/foo.lst'

Just use 'make some/dir/foo.lst' to produce mixed source code and
assembly for debugging. (If the object gets linked in and you have
a System.map, it'll relocate appropriately)

Apart from the needed Makefile bits, also clean up the script
"makelst".

Makefile

@@ -255,6 +255,8 @@ prepare: .hdepend include/config/MARKER
 	@$(MAKE) -C $(@D) $(@F)
 %.o: %.c FORCE
 	@$(MAKE) -C $(@D) $(@F)
+%.lst: %.c FORCE
+	@$(MAKE) -C $(@D) $(@F)
 %.s: %.S FORCE
 	@$(MAKE) -C $(@D) $(@F)
 %.o: %.S FORCE

Rules.make

@@ -101,16 +101,18 @@ first_rule: vmlinux $(if $(BUILD_MODULES),$(obj-m))
 modkern_cflags := $(CFLAGS_KERNEL)
 
 $(real-objs-y)        : modkern_cflags := $(CFLAGS_KERNEL)
-$(real-objs-y:.o=.i): modkern_cflags := $(CFLAGS_KERNEL)
-$(real-objs-y:.o=.s): modkern_cflags := $(CFLAGS_KERNEL)
+$(real-objs-y:.o=.i)  : modkern_cflags := $(CFLAGS_KERNEL)
+$(real-objs-y:.o=.s)  : modkern_cflags := $(CFLAGS_KERNEL)
+$(real-objs-y:.o=.lst): modkern_cflags := $(CFLAGS_KERNEL)
 
 $(real-objs-m)        : modkern_cflags := $(CFLAGS_MODULE)
-$(real-objs-m:.o=.i): modkern_cflags := $(CFLAGS_MODULE)
-$(real-objs-m:.o=.s): modkern_cflags := $(CFLAGS_MODULE)
+$(real-objs-m:.o=.i)  : modkern_cflags := $(CFLAGS_MODULE)
+$(real-objs-m:.o=.lst): modkern_cflags := $(CFLAGS_MODULE)
 
 $(export-objs)        : export_flags   := $(EXPORT_FLAGS)
-$(export-objs:.o=.i): export_flags   := $(EXPORT_FLAGS)
-$(export-objs:.o=.s): export_flags   := $(EXPORT_FLAGS)
+$(export-objs:.o=.i)  : export_flags   := $(EXPORT_FLAGS)
+$(export-objs:.o=.s)  : export_flags   := $(EXPORT_FLAGS)
+$(export-objs:.o=.lst): export_flags   := $(EXPORT_FLAGS)
 
 c_flags = $(CFLAGS) $(modkern_cflags) $(EXTRA_CFLAGS) $(CFLAGS_$(*F).o) -DKBUILD_BASENAME=$(subst $(comma),_,$(subst -,_,$(*F))) $(export_flags)
 
@@ -132,6 +134,12 @@ cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 %.o: %.c FORCE
 	$(call if_changed,cmd_cc_o_c)
 
+quiet_cmd_cc_lst_c = Generating $(RELDIR)/$@
+cmd_cc_lst_c     = $(CC) $(c_flags) -g -c -o $*.o $< && $(TOPDIR)/scripts/makelst $*.o $(TOPDIR)/System.map $(OBJDUMP) > $@
+
+%.lst: %.c FORCE
+	$(call if_changed,cmd_cc_lst_c)
+
 # Compile assembler sources (.S)
 # ---------------------------------------------------------------------------
 
@@ -158,13 +166,6 @@ cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
 %.o: %.S FORCE
 	$(call if_changed,cmd_as_o_S)
 
-# FIXME
-
-%.lst: %.c
-	$(CC) $(c_flags) -g -c -o $*.o $<
-	$(TOPDIR)/scripts/makelst $* $(TOPDIR) $(OBJDUMP)
-
-
 # If a Makefile does define neither O_TARGET nor L_TARGET,
 # use a standard O_TARGET named "built-in.o"
 

scripts/makelst

@@ -6,17 +6,26 @@
 #            William Stearns <wstearns@pobox.com>
 #%.lst: %.c
 #	$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$@) -g -c -o $*.o $<
-#	$(TOPDIR)/scripts/makelst $* $(TOPDIR) $(OBJDUMP)
+#	$(TOPDIR)/scripts/makelst $*.o $(TOPDIR)/System.map $(OBJDUMP)
 #
 #    Copyright (C) 2000 IBM Corporation
 #    Author(s): DJ Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) 
 #
 
-t1=`$3 --syms $2/$1.o | grep .text | grep " F " | head -n 1`
-t2=`echo $t1 | gawk '{ print $6 }'`
-t3=`grep $t2 $2/System.map`
-t4=`echo $t3 | gawk '{ print $1 }'`
-t5=`echo $t1 | gawk '{ print $1 }'`
-t6=`echo $t4 - $t5 | sed -e s/a/A/g -e s/b/B/g -e s/c/C/g -e s/d/D/g -e s/e/E/g -e s/f/F/g`
-t7=`( echo  ibase=16 ; echo $t6 ) | bc`
-$3 --source --adjust-vma=$t7 $2/$1.o > $2/$1.lst
+t1=`$3 --syms $1 | grep .text | grep " F " | head -n 1`
+if [ -n "$t1" ]; then
+  t2=`echo $t1 | gawk '{ print $6 }'`
+  if [ ! -r $2 ]; then
+    echo "No System.map" >&2
+    t7=0
+  else
+    t3=`grep $t2 $2`
+    t4=`echo $t3 | gawk '{ print $1 }'`
+    t5=`echo $t1 | gawk '{ print $1 }'`
+    t6=`echo $t4 - $t5 | tr a-f A-F`
+    t7=`( echo  ibase=16 ; echo $t6 ) | bc`
+  fi
+else
+  t7=0
+fi
+$3 --source --adjust-vma=$t7 $1