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# SPDX-License-Identifier: GPL-2.0
include ../scripts/Makefile.include
include ../scripts/Makefile.arch
ifeq ($(SRCARCH),x86)
BUILD_ORC := y
ARCH_HAS_KLP := y
endif
ifeq ($(SRCARCH),loongarch)
BUILD_ORC := y
endif
ifeq ($(ARCH_HAS_KLP),y)
HAVE_XXHASH = $(shell printf "$(pound)include <xxhash.h>\nXXH3_state_t *state;int main() {}" | \
$(HOSTCC) -xc - -o /dev/null -lxxhash 2> /dev/null && echo y || echo n)
ifeq ($(HAVE_XXHASH),y)
BUILD_KLP := y
LIBXXHASH_CFLAGS := $(shell $(HOSTPKG_CONFIG) libxxhash --cflags 2>/dev/null) \
-DBUILD_KLP
LIBXXHASH_LIBS := $(shell $(HOSTPKG_CONFIG) libxxhash --libs 2>/dev/null || echo -lxxhash)
endif
endif
export BUILD_ORC BUILD_KLP
ifeq ($(srctree),)
srctree := $(patsubst %/,%,$(dir $(CURDIR)))
srctree := $(patsubst %/,%,$(dir $(srctree)))
endif
LIBSUBCMD_DIR = $(srctree)/tools/lib/subcmd/
ifneq ($(OUTPUT),)
LIBSUBCMD_OUTPUT = $(abspath $(OUTPUT))/libsubcmd
else
LIBSUBCMD_OUTPUT = $(CURDIR)/libsubcmd
endif
LIBSUBCMD = $(LIBSUBCMD_OUTPUT)/libsubcmd.a
OBJTOOL := $(OUTPUT)objtool
OBJTOOL_IN := $(OBJTOOL)-in.o
LIBELF_FLAGS := $(shell $(HOSTPKG_CONFIG) libelf --cflags 2>/dev/null)
LIBELF_LIBS := $(shell $(HOSTPKG_CONFIG) libelf --libs 2>/dev/null || echo -lelf)
all: $(OBJTOOL)
WARNINGS := -Werror -Wall -Wextra -Wmissing-prototypes \
-Wmissing-declarations -Wwrite-strings \
-Wno-implicit-fallthrough -Wno-sign-compare \
-Wno-unused-parameter
INCLUDES := -I$(srctree)/tools/include \
-I$(srctree)/tools/include/uapi \
-I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
-I$(srctree)/tools/arch/$(SRCARCH)/include \
-I$(srctree)/tools/objtool/include \
-I$(srctree)/tools/objtool/arch/$(SRCARCH)/include \
-I$(LIBSUBCMD_OUTPUT)/include
OBJTOOL_CFLAGS := -std=gnu11 -fomit-frame-pointer -O2 -g $(WARNINGS) \
$(INCLUDES) $(LIBELF_FLAGS) $(LIBXXHASH_CFLAGS) $(HOSTCFLAGS)
OBJTOOL_LDFLAGS := $(LIBSUBCMD) $(LIBELF_LIBS) $(LIBXXHASH_LIBS) $(HOSTLDFLAGS)
# Allow old libelf to be used:
elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(HOSTCC) $(OBJTOOL_CFLAGS) -x c -E - 2>/dev/null | grep elf_getshdr)
OBJTOOL_CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
# Always want host compilation.
HOST_OVERRIDES := CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)"
#
# To support disassembly, objtool needs libopcodes which is provided
# with libbfd (binutils-dev or binutils-devel package).
#
# We check using HOSTCC directly rather than the shared feature framework
# because objtool is a host tool that links against host libraries.
#
# When using shared libraries, -lopcodes is sufficient as dependencies are
# resolved automatically. With static libraries, we must explicitly link
# against libopcodes' dependencies: libbfd, libiberty, and sometimes libz.
# Try each combination and use the first one that succeeds.
#
LIBOPCODES_LIBS := $(shell \
for libs in "-lopcodes" \
"-lopcodes -lbfd" \
"-lopcodes -lbfd -liberty" \
"-lopcodes -lbfd -liberty -lz"; do \
echo 'extern void disassemble_init_for_target(void *);' \
'int main(void) { disassemble_init_for_target(0); return 0; }' | \
$(HOSTCC) -xc - -o /dev/null $$libs 2>/dev/null && \
echo "$$libs" && break; \
done)
# Styled disassembler support requires binutils >= 2.39
HAVE_DISASM_STYLED := $(shell echo '$(pound)include <dis-asm.h>' | \
$(HOSTCC) -E -xc - 2>/dev/null | grep -q disassembler_style && echo y)
BUILD_DISAS := n
ifneq ($(LIBOPCODES_LIBS),)
BUILD_DISAS := y
OBJTOOL_CFLAGS += -DDISAS -DPACKAGE='"objtool"'
OBJTOOL_LDFLAGS += $(LIBOPCODES_LIBS)
ifeq ($(HAVE_DISASM_STYLED),y)
OBJTOOL_CFLAGS += -DDISASM_INIT_STYLED
endif
endif
export BUILD_DISAS
AWK = awk
MKDIR = mkdir
export srctree OUTPUT CFLAGS SRCARCH AWK
include $(srctree)/tools/build/Makefile.include
$(OBJTOOL_IN): fixdep $(LIBSUBCMD) FORCE
$(Q)$(CONFIG_SHELL) ./sync-check.sh
$(Q)$(MAKE) $(build)=objtool $(HOST_OVERRIDES) CFLAGS="$(OBJTOOL_CFLAGS)" \
LDFLAGS="$(OBJTOOL_LDFLAGS)"
$(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)
$(QUIET_LINK)$(HOSTCC) $(OBJTOOL_IN) $(OBJTOOL_LDFLAGS) -o $@
$(LIBSUBCMD_OUTPUT):
$(Q)$(MKDIR) -p $@
$(LIBSUBCMD): fixdep $(LIBSUBCMD_OUTPUT) FORCE
$(Q)$(MAKE) -C $(LIBSUBCMD_DIR) O=$(LIBSUBCMD_OUTPUT) \
DESTDIR=$(LIBSUBCMD_OUTPUT) prefix= subdir= \
$(HOST_OVERRIDES) EXTRA_CFLAGS="$(OBJTOOL_CFLAGS)" \
$@ install_headers
$(LIBSUBCMD)-clean:
$(call QUIET_CLEAN, libsubcmd)
$(Q)$(RM) -r -- $(LIBSUBCMD_OUTPUT)
clean: $(LIBSUBCMD)-clean
$(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL)
$(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
$(Q)$(RM) $(OUTPUT)arch/x86/lib/cpu-feature-names.c $(OUTPUT)fixdep
$(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep
$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.objtool
$(Q)$(RM) -r -- $(OUTPUT)feature
FORCE:
.PHONY: clean FORCE
|
