On Tue, 2010-06-15 at 14:45 -0500, Timur Tabi wrote:
Peter Tyser wrote:
Was commenting out the 'ifeq' above necessary? It shouldn't be, so my first question would be why it was needed.
Probably because I was using an older U-Boot. When I switch to the latest code, it compiles fine.
However, my entry point is not at 40000:
$ nm -n examples/standalone/flash_wp 00040000 t command_exit 000400c4 t is_locked 00040184 T flash_wp 000403d0 T dummy
'flash_wp' should be at 40000. command_exit and is_locked are two functions in my code. command_exit, however, is not the first function, it's the third.
I think by default its not possible to guarantee function order in gcc's output if a file contains multiple functions. We could create a basic linker script... I think we could also do it with some gcc/ld-foo like:
--- a/examples/standalone/Makefile +++ b/examples/standalone/Makefile @@ -78,6 +78,7 @@ CPPFLAGS += -I.. # inconsistent. ifeq ($(ARCH),powerpc) CFLAGS := $(filter-out $(RELFLAGS),$(CFLAGS)) +CFLAGS += -fno-toplevel-reorder endif
all: $(obj).depend $(OBJS) $(LIB) $(SREC) $(BIN) $(ELF) @@ -88,7 +89,7 @@ $(LIB): $(obj).depend $(LIBOBJS)
$(ELF): $(obj)%: $(obj)%.o $(LIB) - $(LD) -g -Ttext $(STANDALONE_LOAD_ADDR) \ + $(LD) -g -Ttext $(STANDALONE_LOAD_ADDR) -sort-common \ -o $@ -e $(SYM_PREFIX)$(notdir $(<:.o=)) $< $(LIB) \ -L$(gcclibdir) -lgcc
Could you try the above change with your flash_wp test case? Or make the flash_wp app public? It should put the first function at the base of the image in theory.
Best, Peter