mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-22 18:41:06 +00:00
26e5ca93dd
The code which makes up the zImage header intends to leave a 32-byte gap followed by a branch to the real entry point, a magic number, and a word containing the absolute entry point address. This gets messed up with with CONFIG_THUMB2_KERNEL, because the size of the initial padding NOPs changes. Instead, the header can be made fully compatible by restoring it to ARM. In the Thumb-2 case, we can replace the initial NOPs with a sequence which switches to Thumb and jumps to the real entry point. As a consequence, the zImage entry point is now always ARM, so no special magic is needed any more for the uImage rules in the Thumb-2 case. Signed-off-by: Dave Martin <dave.martin@linaro.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
110 lines
2.9 KiB
Makefile
110 lines
2.9 KiB
Makefile
#
|
|
# arch/arm/boot/Makefile
|
|
#
|
|
# This file is included by the global makefile so that you can add your own
|
|
# architecture-specific flags and dependencies.
|
|
#
|
|
# This file is subject to the terms and conditions of the GNU General Public
|
|
# License. See the file "COPYING" in the main directory of this archive
|
|
# for more details.
|
|
#
|
|
# Copyright (C) 1995-2002 Russell King
|
|
#
|
|
|
|
MKIMAGE := $(srctree)/scripts/mkuboot.sh
|
|
|
|
ifneq ($(MACHINE),)
|
|
include $(srctree)/$(MACHINE)/Makefile.boot
|
|
endif
|
|
|
|
# Note: the following conditions must always be true:
|
|
# ZRELADDR == virt_to_phys(PAGE_OFFSET + TEXT_OFFSET)
|
|
# PARAMS_PHYS must be within 4MB of ZRELADDR
|
|
# INITRD_PHYS must be in RAM
|
|
ZRELADDR := $(zreladdr-y)
|
|
PARAMS_PHYS := $(params_phys-y)
|
|
INITRD_PHYS := $(initrd_phys-y)
|
|
|
|
export ZRELADDR INITRD_PHYS PARAMS_PHYS
|
|
|
|
targets := Image zImage xipImage bootpImage uImage
|
|
|
|
ifeq ($(CONFIG_XIP_KERNEL),y)
|
|
|
|
$(obj)/xipImage: vmlinux FORCE
|
|
$(call if_changed,objcopy)
|
|
@echo ' Kernel: $@ is ready (physical address: $(CONFIG_XIP_PHYS_ADDR))'
|
|
|
|
$(obj)/Image $(obj)/zImage: FORCE
|
|
@echo 'Kernel configured for XIP (CONFIG_XIP_KERNEL=y)'
|
|
@echo 'Only the xipImage target is available in this case'
|
|
@false
|
|
|
|
else
|
|
|
|
$(obj)/xipImage: FORCE
|
|
@echo 'Kernel not configured for XIP (CONFIG_XIP_KERNEL!=y)'
|
|
@false
|
|
|
|
$(obj)/Image: vmlinux FORCE
|
|
$(call if_changed,objcopy)
|
|
@echo ' Kernel: $@ is ready'
|
|
|
|
$(obj)/compressed/vmlinux: $(obj)/Image FORCE
|
|
$(Q)$(MAKE) $(build)=$(obj)/compressed $@
|
|
|
|
$(obj)/zImage: $(obj)/compressed/vmlinux FORCE
|
|
$(call if_changed,objcopy)
|
|
@echo ' Kernel: $@ is ready'
|
|
|
|
endif
|
|
|
|
quiet_cmd_uimage = UIMAGE $@
|
|
cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A arm -O linux -T kernel \
|
|
-C none -a $(LOADADDR) -e $(STARTADDR) \
|
|
-n 'Linux-$(KERNELRELEASE)' -d $< $@
|
|
|
|
ifeq ($(CONFIG_ZBOOT_ROM),y)
|
|
$(obj)/uImage: LOADADDR=$(CONFIG_ZBOOT_ROM_TEXT)
|
|
else
|
|
$(obj)/uImage: LOADADDR=$(ZRELADDR)
|
|
endif
|
|
|
|
$(obj)/uImage: STARTADDR=$(LOADADDR)
|
|
|
|
$(obj)/uImage: $(obj)/zImage FORCE
|
|
$(call if_changed,uimage)
|
|
@echo ' Image $@ is ready'
|
|
|
|
$(obj)/bootp/bootp: $(obj)/zImage initrd FORCE
|
|
$(Q)$(MAKE) $(build)=$(obj)/bootp $@
|
|
@:
|
|
|
|
$(obj)/bootpImage: $(obj)/bootp/bootp FORCE
|
|
$(call if_changed,objcopy)
|
|
@echo ' Kernel: $@ is ready'
|
|
|
|
PHONY += initrd FORCE
|
|
initrd:
|
|
@test "$(INITRD_PHYS)" != "" || \
|
|
(echo This machine does not support INITRD; exit -1)
|
|
@test "$(INITRD)" != "" || \
|
|
(echo You must specify INITRD; exit -1)
|
|
|
|
install: $(obj)/Image
|
|
$(CONFIG_SHELL) $(srctree)/$(src)/install.sh $(KERNELRELEASE) \
|
|
$(obj)/Image System.map "$(INSTALL_PATH)"
|
|
|
|
zinstall: $(obj)/zImage
|
|
$(CONFIG_SHELL) $(srctree)/$(src)/install.sh $(KERNELRELEASE) \
|
|
$(obj)/zImage System.map "$(INSTALL_PATH)"
|
|
|
|
zi:
|
|
$(CONFIG_SHELL) $(srctree)/$(src)/install.sh $(KERNELRELEASE) \
|
|
$(obj)/zImage System.map "$(INSTALL_PATH)"
|
|
|
|
i:
|
|
$(CONFIG_SHELL) $(srctree)/$(src)/install.sh $(KERNELRELEASE) \
|
|
$(obj)/Image System.map "$(INSTALL_PATH)"
|
|
|
|
subdir- := bootp compressed
|