[make] add ability to set EXTRA_LINKER_SCRIPTS in modules

This allows for individual modules to extend the main linker script,
primarily to add their own sections to interate over.
Remove the main shared_* linker scripts.

make/build.mk

@@ -8,6 +8,8 @@ ifneq (,$(EXTRA_BUILDRULES))
 -include $(EXTRA_BUILDRULES)
 endif
 
+$(EXTRA_LINKER_SCRIPTS):
+
 $(OUTBIN): $(OUTELF)
 	@echo generating image: $@
 	$(NOECHO)$(SIZE) $<
@@ -17,17 +19,18 @@ $(OUTELF).hex: $(OUTELF)
 	@echo generating hex file: $@
 	$(NOECHO)$(OBJCOPY) -O ihex $< $@
 
-$(OUTELF): $(ALLMODULE_OBJS) $(EXTRA_OBJS) $(LINKER_SCRIPT)
+$(OUTELF): $(ALLMODULE_OBJS) $(EXTRA_OBJS) $(LINKER_SCRIPT) $(EXTRA_LINKER_SCRIPTS)
 	@echo linking $@
 	$(NOECHO)$(SIZE) -t --common $(sort $(ALLMODULE_OBJS)) $(EXTRA_OBJS)
-	$(NOECHO)$(LD) $(GLOBAL_LDFLAGS) -T $(LINKER_SCRIPT) $(ALLMODULE_OBJS) $(EXTRA_OBJS) $(LIBGCC) -o $@
+	$(NOECHO)$(LD) $(GLOBAL_LDFLAGS) -dT $(LINKER_SCRIPT) $(addprefix -T,$(EXTRA_LINKER_SCRIPTS)) \
+		$(ALLMODULE_OBJS) $(EXTRA_OBJS) $(LIBGCC) -o $@
 
 $(OUTELF).sym: $(OUTELF)
 	@echo generating symbols: $@
 	$(NOECHO)$(OBJDUMP) -t $< | $(CPPFILT) > $@
 
 $(OUTELF).sym.sorted: $(OUTELF)
-	@echo generating symbols: $@
+	@echo generating sorted symbols: $@
 	$(NOECHO)$(OBJDUMP) -t $< | $(CPPFILT) | sort > $@
 
 $(OUTELF).lst: $(OUTELF)
@@ -38,6 +41,10 @@ $(OUTELF).debug.lst: $(OUTELF)
 	@echo generating listing: $@
 	$(NOECHO)$(OBJDUMP) -Mreg-names-raw -S $< | $(CPPFILT) > $@
 
+$(OUTELF).dump: $(OUTELF)
+	@echo generating objdump: $@
+	$(NOECHO)$(OBJDUMP) -x $< > $@
+
 $(OUTELF).size: $(OUTELF)
 	@echo generating size map: $@
 	$(NOECHO)$(NM) -S --size-sort $< > $@