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# Ubuntu unconditionally add ELF_PACKAGE_METADATA in dpkg-buildpacakge,
# which causes ld to add extra .note.package sections.
unexport ELF_PACKAGE_METADATA
ARCH := amd64
# sync with pkg/sentry/platform/systrap/sysmsg/build.bzl
CFLAGS := -Wall -Wno-unused-command-line-argument
CFLAGS += -fpie
ifeq ($(ARCH),amd64)
CFLAGS += -O2
endif
ifeq ($(ARCH),arm64)
CFLAGS += -O1 -mno-outline-atomics
endif
CFLAGS += -fno-builtin
CFLAGS += -ffreestanding
CFLAGS += -mgeneral-regs-only
CFLAGS += -g
CFLAGS += -Wa,--noexecstack
CFLAGS += -fno-asynchronous-unwind-tables
CFLAGS += -fno-stack-protector
%.o: %.S
$(CC) $(CFLAGS) -c $^ -o $@
%.o: %.c
$(CC) $(CFLAGS) -c $^ -o $@
sighandler.built-in.bin.o: sighandler_$(ARCH).o syshandler_$(ARCH).o sigrestorer_$(ARCH).o sysmsg_lib.o
$(LD) -pie -z noexecstack -T pie.lds.S $^ -o $@
sighandler_$(ARCH).go: sighandler.built-in.bin.o
bash gen_offsets_go.sh sighandler Sighandler $^ > $@
sighandler.built-in.$(ARCH).bin: sighandler.built-in.bin.o
objcopy -O binary $^ $@
all: sighandler.built-in.$(ARCH).bin sighandler_$(ARCH).go
clean:
$(RM) *.o
distclean: clean
$(RM) *.bin sighandler_*.go
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