5064343fb1
The enclave binary (test_encl.elf) is built with only three sections (tcs, text, and data) as controlled by its custom linker script. If gcc is built with "--enable-linker-build-id" (this appears to be a common configuration even if it is by default off) then gcc will pass "--build-id" to the linker that will prompt it (the linker) to write unique bits identifying the linked file to a ".note.gnu.build-id" section. The section ".note.gnu.build-id" does not exist in the test enclave resulting in the following warning emitted by the linker: /usr/bin/ld: warning: .note.gnu.build-id section discarded, --build-id ignored The test enclave does not use the build id within the binary so fix the warning by passing a build id of "none" to the linker that will disable the setting from any earlier "--build-id" options and thus disable the attempt to write the build id to a ".note.gnu.build-id" section that does not exist. Link: https://lore.kernel.org/linux-sgx/20191017030340.18301-2-sean.j.christopherson@intel.com/ Suggested-by: Cedric Xing <cedric.xing@intel.com> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Acked-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lkml.kernel.org/r/ca0f8a81fc1e78af9bdbc6a88e0f9c37d82e53f2.1636997631.git.reinette.chatre@intel.com
58 lines
1.3 KiB
Makefile
58 lines
1.3 KiB
Makefile
top_srcdir = ../../../..
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include ../lib.mk
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.PHONY: all clean
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CAN_BUILD_X86_64 := $(shell ../x86/check_cc.sh $(CC) \
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../x86/trivial_64bit_program.c)
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ifndef OBJCOPY
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OBJCOPY := $(CROSS_COMPILE)objcopy
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endif
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INCLUDES := -I$(top_srcdir)/tools/include
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HOST_CFLAGS := -Wall -Werror -g $(INCLUDES) -fPIC -z noexecstack
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ENCL_CFLAGS := -Wall -Werror -static -nostdlib -nostartfiles -fPIC \
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-fno-stack-protector -mrdrnd $(INCLUDES)
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TEST_CUSTOM_PROGS := $(OUTPUT)/test_sgx
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ifeq ($(CAN_BUILD_X86_64), 1)
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all: $(TEST_CUSTOM_PROGS) $(OUTPUT)/test_encl.elf
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endif
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$(OUTPUT)/test_sgx: $(OUTPUT)/main.o \
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$(OUTPUT)/load.o \
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$(OUTPUT)/sigstruct.o \
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$(OUTPUT)/call.o \
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$(OUTPUT)/sign_key.o
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$(CC) $(HOST_CFLAGS) -o $@ $^ -lcrypto
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$(OUTPUT)/main.o: main.c
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$(CC) $(HOST_CFLAGS) -c $< -o $@
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$(OUTPUT)/load.o: load.c
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$(CC) $(HOST_CFLAGS) -c $< -o $@
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$(OUTPUT)/sigstruct.o: sigstruct.c
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$(CC) $(HOST_CFLAGS) -c $< -o $@
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$(OUTPUT)/call.o: call.S
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$(CC) $(HOST_CFLAGS) -c $< -o $@
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$(OUTPUT)/sign_key.o: sign_key.S
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$(CC) $(HOST_CFLAGS) -c $< -o $@
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$(OUTPUT)/test_encl.elf: test_encl.lds test_encl.c test_encl_bootstrap.S
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$(CC) $(ENCL_CFLAGS) -T $^ -o $@ -Wl,--build-id=none
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EXTRA_CLEAN := \
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$(OUTPUT)/test_encl.elf \
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$(OUTPUT)/load.o \
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$(OUTPUT)/call.o \
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$(OUTPUT)/main.o \
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$(OUTPUT)/sigstruct.o \
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$(OUTPUT)/test_sgx \
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$(OUTPUT)/test_sgx.o \
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