u-boot/examples/standalone/Makefile
Peter Tyser 620bbba524 examples/standalone: Remove relocation compile flags for PowerPC
Previously, standalone applications were compiled with gcc flags that
produced relocatable executables on the PowerPC architecture (eg with
the -mrelocatable and -fPIC flags).  There's no reason for these
applications to be fully relocatable at this time since no relocation
fixups are performed on standalone applications.

Additionally, removing the gcc relocation flags results in the entry
point of applications residing at the base of the image.  When
a standalone application was relocatable, the entry point was generally
located at an offset into the image which was confusing and prone to
errors.

This change moves the entry point of PowerPC standalone applications
from 0x40004 (usually) to 0x40000.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Wolfgang Denk <wd@denx.de>
2010-06-29 22:29:13 +02:00

112 lines
3.4 KiB
Makefile

#
# (C) Copyright 2000-2006
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
#
# See file CREDITS for list of people who contributed to this
# project.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
#
include $(TOPDIR)/config.mk
ELF-$(ARCH) :=
ELF-$(BOARD) :=
ELF-$(CPU) :=
ELF-y := hello_world
ELF-$(CONFIG_SMC91111) += smc91111_eeprom
ELF-$(CONFIG_SMC911X) += smc911x_eeprom
ELF-$(CONFIG_SPI_FLASH_ATMEL) += atmel_df_pow2
ELF-i386 += 82559_eeprom
ELF-mpc5xxx += interrupt
ELF-mpc8xx += test_burst timer
ELF-mpc8260 += mem_to_mem_idma2intr
ELF-ppc += sched
ELF-oxc += eepro100_eeprom
#
# Some versions of make do not handle trailing white spaces properly;
# leading to build failures. The problem was found with GNU Make 3.80.
# Using 'strip' as a workaround for the problem.
#
ELF := $(strip $(ELF-y) $(ELF-$(ARCH)) $(ELF-$(BOARD)) $(ELF-$(CPU)))
SREC = $(addsuffix .srec,$(ELF))
BIN = $(addsuffix .bin,$(ELF))
COBJS := $(ELF:=.o)
LIB = $(obj)libstubs.a
LIBAOBJS-$(ARCH) :=
LIBAOBJS-$(CPU) :=
LIBAOBJS-ppc += $(ARCH)_longjmp.o $(ARCH)_setjmp.o
LIBAOBJS-mpc8xx += test_burst_lib.o
LIBAOBJS := $(LIBAOBJS-$(ARCH)) $(LIBAOBJS-$(CPU))
LIBCOBJS = stubs.o
LIBOBJS = $(addprefix $(obj),$(LIBAOBJS) $(LIBCOBJS))
SRCS := $(COBJS:.o=.c) $(LIBCOBJS:.o=.c) $(LIBAOBJS:.o=.S)
OBJS := $(addprefix $(obj),$(COBJS))
ELF := $(addprefix $(obj),$(ELF))
BIN := $(addprefix $(obj),$(BIN))
SREC := $(addprefix $(obj),$(SREC))
gcclibdir := $(shell dirname `$(CC) -print-libgcc-file-name`)
CPPFLAGS += -I..
# For PowerPC there's no need to compile standalone applications as a
# relocatable executable. The relocation data is not needed, and
# also causes the entry point of the standalone application to be
# inconsistent.
ifeq ($(ARCH),powerpc)
AFLAGS := $(filter-out $(RELFLAGS),$(AFLAGS))
CFLAGS := $(filter-out $(RELFLAGS),$(CFLAGS))
CPPFLAGS := $(filter-out $(RELFLAGS),$(CPPFLAGS))
endif
all: $(obj).depend $(OBJS) $(LIB) $(SREC) $(BIN) $(ELF)
#########################################################################
$(LIB): $(obj).depend $(LIBOBJS)
$(AR) $(ARFLAGS) $@ $(LIBOBJS)
$(ELF):
$(obj)%: $(obj)%.o $(LIB)
$(LD) -g -Ttext $(STANDALONE_LOAD_ADDR) \
-o $@ -e $(SYM_PREFIX)$(notdir $(<:.o=)) $< $(LIB) \
-L$(gcclibdir) -lgcc
$(SREC):
$(obj)%.srec: $(obj)%
$(OBJCOPY) -O srec $< $@ 2>/dev/null
$(BIN):
$(obj)%.bin: $(obj)%
$(OBJCOPY) -O binary $< $@ 2>/dev/null
#########################################################################
# defines $(obj).depend target
include $(SRCTREE)/rules.mk
sinclude $(obj).depend
#########################################################################