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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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173767c218
The object files in purgatory do not export symbols, so disable exports for all the object files, not only sha256.o, with -D__DISABLE_EXPORTS. This fixes a build failure with CONFIG_GENDWARFKSYMS, where we would otherwise attempt to calculate symbol versions for purgatory objects and fail because they're not built with debugging information: error: gendwarfksyms: process_module: dwarf_get_units failed: no debugging information? make[5]: *** [../scripts/Makefile.build:207: arch/s390/purgatory/string.o] Error 1 make[5]: *** Deleting file 'arch/s390/purgatory/string.o' Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202502120752.U3fOKScQ-lkp@intel.com/ Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Link: https://lore.kernel.org/r/20250213211614.3537605-2-samitolvanen@google.com Acked-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
49 lines
1.8 KiB
Makefile
49 lines
1.8 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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purgatory-y := head.o purgatory.o string.o sha256.o mem.o
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targets += $(purgatory-y) purgatory.lds purgatory purgatory.chk purgatory.ro
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PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y))
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$(obj)/sha256.o: $(srctree)/lib/crypto/sha256.c FORCE
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$(call if_changed_rule,cc_o_c)
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CFLAGS_sha256.o := -D__NO_FORTIFY
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$(obj)/mem.o: $(srctree)/arch/s390/lib/mem.S FORCE
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$(call if_changed_rule,as_o_S)
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KBUILD_CFLAGS := -std=gnu11 -fno-strict-aliasing -Wall -Wstrict-prototypes
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KBUILD_CFLAGS += -Wno-pointer-sign -Wno-sign-compare
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KBUILD_CFLAGS += -fno-zero-initialized-in-bss -fno-builtin -ffreestanding
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KBUILD_CFLAGS += -Os -m64 -msoft-float -fno-common
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KBUILD_CFLAGS += -fno-stack-protector
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KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
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KBUILD_CFLAGS += -D__DISABLE_EXPORTS
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KBUILD_CFLAGS += $(CLANG_FLAGS)
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KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
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KBUILD_AFLAGS := $(filter-out -DCC_USING_EXPOLINE,$(KBUILD_AFLAGS))
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KBUILD_AFLAGS += -D__DISABLE_EXPORTS
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# Since we link purgatory with -r unresolved symbols are not checked, so we
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# also link a purgatory.chk binary without -r to check for unresolved symbols.
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PURGATORY_LDFLAGS := -nostdlib -z nodefaultlib
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LDFLAGS_purgatory := -r $(PURGATORY_LDFLAGS) -T
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LDFLAGS_purgatory.chk := -e purgatory_start $(PURGATORY_LDFLAGS)
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$(obj)/purgatory: $(obj)/purgatory.lds $(PURGATORY_OBJS) FORCE
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$(call if_changed,ld)
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$(obj)/purgatory.chk: $(obj)/purgatory FORCE
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$(call if_changed,ld)
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OBJCOPYFLAGS_purgatory.ro := -O elf64-s390
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OBJCOPYFLAGS_purgatory.ro += --remove-section='*debug*'
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OBJCOPYFLAGS_purgatory.ro += --remove-section='.comment'
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OBJCOPYFLAGS_purgatory.ro += --remove-section='.note.*'
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$(obj)/purgatory.ro: $(obj)/purgatory $(obj)/purgatory.chk FORCE
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$(call if_changed,objcopy)
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$(obj)/kexec-purgatory.o: $(obj)/purgatory.ro
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obj-y += kexec-purgatory.o
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