14d0b1096a
[ Upstream commit 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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
4.2 KiB
This file is subject to the terms and conditions of the GNU General Public
License.
Adapted for MIPS Pete Popov, Dan Malek
Copyright (C) 1994 by Linus Torvalds
Adapted for PowerPC by Gary Thomas
modified by Cort (cort@cs.nmt.edu)
Copyright (C) 2009 Lemote Inc. & DSLab, Lanzhou University
Author: Wu Zhangjin wuzhangjin@gmail.com
include $(srctree)/arch/mips/Kbuild.platforms
set the default size of the mallocing area for decompressing
BOOT_HEAP_SIZE := 0x400000
Disable Function Tracer
KBUILD_CFLAGS := $(filter-out -pg, $(KBUILD_CFLAGS))
KBUILD_CFLAGS := $(filter-out -fstack-protector, $(KBUILD_CFLAGS))
KBUILD_CFLAGS := $(KBUILD_CFLAGS) -D__KERNEL__
-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) -D"VMLINUX_LOAD_ADDRESS_ULL=$(VMLINUX_LOAD_ADDRESS)ull"
KBUILD_AFLAGS := $(KBUILD_AFLAGS) -D__ASSEMBLY__
-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE)
-DKERNEL_ENTRY=$(VMLINUX_ENTRY_ADDRESS)
Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
KCOV_INSTRUMENT := n
decompressor objects (linked with vmlinuz)
vmlinuzobjs-y := $(obj)/head.o $(obj)/decompress.o $(obj)/string.o
ifdef CONFIG_DEBUG_ZBOOT vmlinuzobjs-$(CONFIG_DEBUG_ZBOOT) += $(obj)/dbg.o vmlinuzobjs-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART16550) += $(obj)/uart-16550.o vmlinuzobjs-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART_PROM) += $(obj)/uart-prom.o vmlinuzobjs-$(CONFIG_MIPS_ALCHEMY) += $(obj)/uart-alchemy.o vmlinuzobjs-$(CONFIG_ATH79) += $(obj)/uart-ath79.o endif
extra-y += uart-ath79.c $(obj)/uart-ath79.c: $(srctree)/arch/mips/ath79/early_printk.c $(call cmd,shipped)
vmlinuzobjs-$(CONFIG_KERNEL_XZ) += $(obj)/ashldi3.o $(obj)/bswapsi.o
extra-y += ashldi3.c bswapsi.c $(obj)/ashldi3.o $(obj)/bswapsi.o: KBUILD_CFLAGS += -I$(srctree)/arch/mips/lib $(obj)/ashldi3.c $(obj)/bswapsi.c: $(obj)/%.c: $(srctree)/arch/mips/lib/%.c $(call cmd,shipped)
targets := $(notdir $(vmlinuzobjs-y))
targets += vmlinux.bin OBJCOPYFLAGS_vmlinux.bin := $(OBJCOPYFLAGS) -O binary -R .comment -S $(obj)/vmlinux.bin: $(KBUILD_IMAGE) FORCE $(call if_changed,objcopy)
tool_$(CONFIG_KERNEL_GZIP) = gzip tool_$(CONFIG_KERNEL_BZIP2) = bzip2 tool_$(CONFIG_KERNEL_LZ4) = lz4 tool_$(CONFIG_KERNEL_LZMA) = lzma tool_$(CONFIG_KERNEL_LZO) = lzo tool_$(CONFIG_KERNEL_XZ) = xzkern
targets += vmlinux.bin.z $(obj)/vmlinux.bin.z: $(obj)/vmlinux.bin FORCE $(call if_changed,$(tool_y))
targets += piggy.o dummy.o
OBJCOPYFLAGS_piggy.o := --add-section=.image=$(obj)/vmlinux.bin.z
--set-section-flags=.image=contents,alloc,load,readonly,data
$(obj)/piggy.o: $(obj)/dummy.o $(obj)/vmlinux.bin.z FORCE
$(call if_changed,objcopy)
HOSTCFLAGS_calc_vmlinuz_load_addr.o += $(LINUXINCLUDE)
Calculate the load address of the compressed kernel image
hostprogs-y := calc_vmlinuz_load_addr
ifneq ($(zload-y),)
VMLINUZ_LOAD_ADDRESS := $(zload-y)
else
VMLINUZ_LOAD_ADDRESS = $(shell $(obj)/calc_vmlinuz_load_addr
$(obj)/vmlinux.bin $(LINKER_LOAD_ADDRESS))
endif
UIMAGE_LOADADDR = $(VMLINUZ_LOAD_ADDRESS)
vmlinuzobjs-y += $(obj)/piggy.o
quiet_cmd_zld = LD $@ cmd_zld = $(LD) $(LDFLAGS) -Ttext $(VMLINUZ_LOAD_ADDRESS) -T $< $(vmlinuzobjs-y) -o $@ quiet_cmd_strip = STRIP $@ cmd_strip = $(STRIP) -s $@ vmlinuz: $(src)/ld.script $(vmlinuzobjs-y) $(obj)/calc_vmlinuz_load_addr $(call cmd,zld) $(call cmd,strip)
Some DECstations need all possible sections of an ECOFF executable
ifdef CONFIG_MACH_DECSTATION e2eflag := -a endif
elf2ecoff can only handle 32bit image
hostprogs-y += ../elf2ecoff
ifdef CONFIG_32BIT VMLINUZ = vmlinuz else VMLINUZ = vmlinuz.32 endif
quiet_cmd_32 = OBJCOPY $@ cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@ vmlinuz.32: vmlinuz $(call cmd,32)
quiet_cmd_ecoff = ECOFF $@ cmd_ecoff = $< $(VMLINUZ) $@ $(e2eflag) vmlinuz.ecoff: $(obj)/../elf2ecoff $(VMLINUZ) $(call cmd,ecoff)
OBJCOPYFLAGS_vmlinuz.bin := $(OBJCOPYFLAGS) -O binary vmlinuz.bin: vmlinuz $(call cmd,objcopy)
OBJCOPYFLAGS_vmlinuz.srec := $(OBJCOPYFLAGS) -S -O srec vmlinuz.srec: vmlinuz $(call cmd,objcopy)
uzImage.bin: vmlinuz.bin FORCE $(call if_changed,uimage,none)
clean-files += $(objtree)/vmlinuz clean-files += $(objtree)/vmlinuz.32 clean-files += $(objtree)/vmlinuz.ecoff clean-files += $(objtree)/vmlinuz.bin clean-files += $(objtree)/vmlinuz.srec