ff487d4103
LLD failed to link vmlinux with 64bit load address for 32bit ELF while bfd will strip 64bit address into 32bit silently. To fix LLD build, we should truncate load address provided by platform into 32bit for 32bit kernel. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Link: https://github.com/ClangBuiltLinux/linux/issues/786 Link: https://sourceware.org/bugzilla/show_bug.cgi?id=25784 Reviewed-by: Fangrui Song <maskray@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Tested-by: Nathan Chancellor <natechancellor@gmail.com> Cc: Maciej W. Rozycki <macro@linux-mips.org> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
149 lines
4.2 KiB
Makefile
149 lines
4.2 KiB
Makefile
#
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# This file is subject to the terms and conditions of the GNU General Public
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# License.
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#
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# Adapted for MIPS Pete Popov, Dan Malek
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#
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# Copyright (C) 1994 by Linus Torvalds
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# Adapted for PowerPC by Gary Thomas
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# modified by Cort (cort@cs.nmt.edu)
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#
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# Copyright (C) 2009 Lemote Inc. & DSLab, Lanzhou University
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# Author: Wu Zhangjin <wuzhangjin@gmail.com>
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#
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include $(srctree)/arch/mips/Kbuild.platforms
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# set the default size of the mallocing area for decompressing
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BOOT_HEAP_SIZE := 0x400000
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# Disable Function Tracer
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KBUILD_CFLAGS := $(filter-out -pg, $(KBUILD_CFLAGS))
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KBUILD_CFLAGS := $(filter-out -fstack-protector, $(KBUILD_CFLAGS))
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KBUILD_CFLAGS := $(KBUILD_CFLAGS) -D__KERNEL__ \
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-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) -D"VMLINUX_LOAD_ADDRESS_ULL=$(VMLINUX_LOAD_ADDRESS)ull"
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KBUILD_AFLAGS := $(KBUILD_AFLAGS) -D__ASSEMBLY__ \
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-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) \
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-DKERNEL_ENTRY=$(VMLINUX_ENTRY_ADDRESS)
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# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
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KCOV_INSTRUMENT := n
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# decompressor objects (linked with vmlinuz)
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vmlinuzobjs-y := $(obj)/head.o $(obj)/decompress.o $(obj)/string.o
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ifdef CONFIG_DEBUG_ZBOOT
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vmlinuzobjs-$(CONFIG_DEBUG_ZBOOT) += $(obj)/dbg.o
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vmlinuzobjs-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART16550) += $(obj)/uart-16550.o
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vmlinuzobjs-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART_PROM) += $(obj)/uart-prom.o
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vmlinuzobjs-$(CONFIG_MIPS_ALCHEMY) += $(obj)/uart-alchemy.o
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vmlinuzobjs-$(CONFIG_ATH79) += $(obj)/uart-ath79.o
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endif
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extra-y += uart-ath79.c
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$(obj)/uart-ath79.c: $(srctree)/arch/mips/ath79/early_printk.c
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$(call cmd,shipped)
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vmlinuzobjs-$(CONFIG_KERNEL_XZ) += $(obj)/ashldi3.o $(obj)/bswapsi.o
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extra-y += ashldi3.c
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$(obj)/ashldi3.c: $(obj)/%.c: $(srctree)/lib/%.c FORCE
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$(call if_changed,shipped)
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extra-y += bswapsi.c
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$(obj)/bswapsi.c: $(obj)/%.c: $(srctree)/arch/mips/lib/%.c FORCE
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$(call if_changed,shipped)
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targets := $(notdir $(vmlinuzobjs-y))
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targets += vmlinux.bin
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OBJCOPYFLAGS_vmlinux.bin := $(OBJCOPYFLAGS) -O binary -R .comment -S
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$(obj)/vmlinux.bin: $(KBUILD_IMAGE) FORCE
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$(call if_changed,objcopy)
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tool_$(CONFIG_KERNEL_GZIP) = gzip
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tool_$(CONFIG_KERNEL_BZIP2) = bzip2
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tool_$(CONFIG_KERNEL_LZ4) = lz4
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tool_$(CONFIG_KERNEL_LZMA) = lzma
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tool_$(CONFIG_KERNEL_LZO) = lzo
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tool_$(CONFIG_KERNEL_XZ) = xzkern
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targets += vmlinux.bin.z
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$(obj)/vmlinux.bin.z: $(obj)/vmlinux.bin FORCE
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$(call if_changed,$(tool_y))
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targets += piggy.o dummy.o
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OBJCOPYFLAGS_piggy.o := --add-section=.image=$(obj)/vmlinux.bin.z \
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--set-section-flags=.image=contents,alloc,load,readonly,data
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$(obj)/piggy.o: $(obj)/dummy.o $(obj)/vmlinux.bin.z FORCE
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$(call if_changed,objcopy)
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HOSTCFLAGS_calc_vmlinuz_load_addr.o += $(LINUXINCLUDE)
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# Calculate the load address of the compressed kernel image
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hostprogs := calc_vmlinuz_load_addr
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ifneq ($(zload-y),)
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VMLINUZ_LOAD_ADDRESS := $(zload-y)
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else
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VMLINUZ_LOAD_ADDRESS = $(shell $(obj)/calc_vmlinuz_load_addr \
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$(obj)/vmlinux.bin $(LINKER_LOAD_ADDRESS))
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endif
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UIMAGE_LOADADDR = $(VMLINUZ_LOAD_ADDRESS)
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vmlinuzobjs-y += $(obj)/piggy.o
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quiet_cmd_zld = LD $@
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cmd_zld = $(LD) $(KBUILD_LDFLAGS) -Ttext $(VMLINUZ_LOAD_ADDRESS) -T $< $(vmlinuzobjs-y) -o $@
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quiet_cmd_strip = STRIP $@
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cmd_strip = $(STRIP) -s $@
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vmlinuz: $(src)/ld.script $(vmlinuzobjs-y) $(obj)/calc_vmlinuz_load_addr
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$(call cmd,zld)
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$(call cmd,strip)
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#
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# Some DECstations need all possible sections of an ECOFF executable
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#
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ifdef CONFIG_MACH_DECSTATION
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e2eflag := -a
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endif
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# elf2ecoff can only handle 32bit image
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hostprogs += ../elf2ecoff
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ifdef CONFIG_32BIT
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VMLINUZ = vmlinuz
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else
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VMLINUZ = vmlinuz.32
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endif
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quiet_cmd_32 = OBJCOPY $@
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cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
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vmlinuz.32: vmlinuz
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$(call cmd,32)
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quiet_cmd_ecoff = ECOFF $@
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cmd_ecoff = $< $(VMLINUZ) $@ $(e2eflag)
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vmlinuz.ecoff: $(obj)/../elf2ecoff $(VMLINUZ)
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$(call cmd,ecoff)
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OBJCOPYFLAGS_vmlinuz.bin := $(OBJCOPYFLAGS) -O binary
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vmlinuz.bin: vmlinuz
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$(call cmd,objcopy)
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OBJCOPYFLAGS_vmlinuz.srec := $(OBJCOPYFLAGS) -S -O srec
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vmlinuz.srec: vmlinuz
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$(call cmd,objcopy)
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uzImage.bin: vmlinuz.bin FORCE
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$(call if_changed,uimage,none)
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clean-files += $(objtree)/vmlinuz
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clean-files += $(objtree)/vmlinuz.32
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clean-files += $(objtree)/vmlinuz.ecoff
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clean-files += $(objtree)/vmlinuz.bin
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clean-files += $(objtree)/vmlinuz.srec
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