This patch from Ralf Grosse Boerger makes debugging more comfortable.

With this patch it's possible to 

- determine the according source code line for each asm statement
  (objdump -dS)
- determine the source code file for each asm statement 
  (objdump -ddl)

This isn't exactly trivial because cache_as_ram_auto.c gets compiled to
assembly and converted by a perl script afterwards.

This patch solves the problem 
- by extending cache_as_ram_auto.inc with debug information and line
  numbers
- by correcting the perl calls (".text" --> "\.text")
- by creating a disassembly with source code and line numbers.
  (ctr0.disasm and
  coreboot.disasm)

There's one minor downside to the patch: A complete abuild run takes up
around 1.6G instead of about 700MB now. But I'm sure this is quite
reasonable for the benefits.

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>

Please commit while this is being worked out.
Acked-by: Peter Stuge <peter@stuge.se>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3778 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

src/config/Config.lb

@@ -124,6 +124,7 @@ makerule coreboot
 	depends	"crt0.o $(INIT-OBJECTS) $(COREBOOT_APC) $(COREBOOT_RAM_ROM) ldscript.ld"
 	action	"$(CC) $(DISTRO_LFLAGS) -nostdlib -nostartfiles -static -o $@ -T ldscript.ld crt0.o $(INIT-OBJECTS)"
 	action	"$(CROSS_COMPILE)nm -n coreboot | sort > coreboot.map"
+	action 	"$(CROSS_COMPILE)objdump -dS coreboot > coreboot.disasm"	
 end
 
 # the buildrom tool
@@ -139,9 +140,10 @@ makerule crt0.s
 	action	"$(CPP) $(CPPFLAGS) -I. -I$(TOP)/src  $< > $@.new && mv $@.new $@"
 end
 
+# generate an assembly listing via -a switch.
 makerule crt0.o  
 	depends	"crt0.s" 
-	action	"@$(CC) -c $(CPU_OPT) -o $@ $<"
+	action	"$(CC) -Wa,-acdlns -c $(CPU_OPT) -o $@ $< >crt0.disasm"
 end
 
 makerule etags