3cb59581a8
We currently define OBJCOPYFLAGS in the top-level arm Makefile, and thus these flags will be passed to all uses of objcopy, kernel-wide, for which they are not explicitly overridden. The flags we set are intended for converting a few ELF files into raw binaries, and thus the flags chosen are problematic for some other uses which do not expect a raw binary result, e.g. the upcoming lkdtm rodata test: http://www.openwall.com/lists/kernel-hardening/2016/06/08/2 This patch localises the objcopy flags such that they are only used for the cases we require them for today. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Kees Cook <keescook@chromium.org> Tested-by: Laura Abbott <labbott@redhat.com> Cc: Russell King <linux@armlinux.org.uk> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
108 lines
2.8 KiB
Makefile
108 lines
2.8 KiB
Makefile
#
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# arch/arm/boot/Makefile
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#
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# This file is included by the global makefile so that you can add your own
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# architecture-specific flags and dependencies.
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#
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# This file is subject to the terms and conditions of the GNU General Public
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# License. See the file "COPYING" in the main directory of this archive
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# for more details.
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#
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# Copyright (C) 1995-2002 Russell King
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#
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OBJCOPYFLAGS :=-O binary -R .comment -S
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ifneq ($(MACHINE),)
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include $(MACHINE)/Makefile.boot
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endif
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# Note: the following conditions must always be true:
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# ZRELADDR == virt_to_phys(PAGE_OFFSET + TEXT_OFFSET)
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# PARAMS_PHYS must be within 4MB of ZRELADDR
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# INITRD_PHYS must be in RAM
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ZRELADDR := $(zreladdr-y)
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PARAMS_PHYS := $(params_phys-y)
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INITRD_PHYS := $(initrd_phys-y)
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export ZRELADDR INITRD_PHYS PARAMS_PHYS
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targets := Image zImage xipImage bootpImage uImage
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ifeq ($(CONFIG_XIP_KERNEL),y)
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$(obj)/xipImage: vmlinux FORCE
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$(call if_changed,objcopy)
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@$(kecho) ' Physical Address of xipImage: $(CONFIG_XIP_PHYS_ADDR)'
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$(obj)/Image $(obj)/zImage: FORCE
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@echo 'Kernel configured for XIP (CONFIG_XIP_KERNEL=y)'
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@echo 'Only the xipImage target is available in this case'
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@false
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else
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$(obj)/xipImage: FORCE
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@echo 'Kernel not configured for XIP (CONFIG_XIP_KERNEL!=y)'
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@false
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$(obj)/Image: vmlinux FORCE
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$(call if_changed,objcopy)
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$(obj)/compressed/vmlinux: $(obj)/Image FORCE
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$(Q)$(MAKE) $(build)=$(obj)/compressed $@
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$(obj)/zImage: $(obj)/compressed/vmlinux FORCE
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$(call if_changed,objcopy)
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endif
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ifneq ($(LOADADDR),)
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UIMAGE_LOADADDR=$(LOADADDR)
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else
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ifeq ($(CONFIG_ZBOOT_ROM),y)
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UIMAGE_LOADADDR=$(CONFIG_ZBOOT_ROM_TEXT)
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else
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UIMAGE_LOADADDR=$(ZRELADDR)
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endif
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endif
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check_for_multiple_loadaddr = \
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if [ $(words $(UIMAGE_LOADADDR)) -ne 1 ]; then \
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echo 'multiple (or no) load addresses: $(UIMAGE_LOADADDR)'; \
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echo 'This is incompatible with uImages'; \
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echo 'Specify LOADADDR on the commandline to build an uImage'; \
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false; \
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fi
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$(obj)/uImage: $(obj)/zImage FORCE
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@$(check_for_multiple_loadaddr)
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$(call if_changed,uimage)
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$(obj)/bootp/bootp: $(obj)/zImage initrd FORCE
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$(Q)$(MAKE) $(build)=$(obj)/bootp $@
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$(obj)/bootpImage: $(obj)/bootp/bootp FORCE
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$(call if_changed,objcopy)
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PHONY += initrd install zinstall uinstall
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initrd:
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@test "$(INITRD_PHYS)" != "" || \
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(echo This machine does not support INITRD; exit -1)
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@test "$(INITRD)" != "" || \
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(echo You must specify INITRD; exit -1)
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install:
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$(CONFIG_SHELL) $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" \
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$(obj)/Image System.map "$(INSTALL_PATH)"
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zinstall:
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$(CONFIG_SHELL) $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" \
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$(obj)/zImage System.map "$(INSTALL_PATH)"
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uinstall:
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$(CONFIG_SHELL) $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" \
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$(obj)/uImage System.map "$(INSTALL_PATH)"
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subdir- := bootp compressed dts
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