1# SPDX-License-Identifier: GPL-2.0 2include ../scripts/Makefile.include 3include ../scripts/Makefile.arch 4 5ifeq ($(SRCARCH),x86) 6 BUILD_ORC := y 7 ARCH_HAS_KLP := y 8endif 9 10ifeq ($(SRCARCH),loongarch) 11 BUILD_ORC := y 12endif 13 14ifeq ($(ARCH_HAS_KLP),y) 15 HAVE_XXHASH = $(shell printf "$(pound)include <xxhash.h>\nXXH3_state_t *state;int main() {}" | \ 16 $(HOSTCC) -xc - -o /dev/null -lxxhash 2> /dev/null && echo y || echo n) 17 ifeq ($(HAVE_XXHASH),y) 18 BUILD_KLP := y 19 LIBXXHASH_CFLAGS := $(shell $(HOSTPKG_CONFIG) libxxhash --cflags 2>/dev/null) \ 20 -DBUILD_KLP 21 LIBXXHASH_LIBS := $(shell $(HOSTPKG_CONFIG) libxxhash --libs 2>/dev/null || echo -lxxhash) 22 endif 23endif 24 25export BUILD_ORC BUILD_KLP 26 27ifeq ($(srctree),) 28srctree := $(patsubst %/,%,$(dir $(CURDIR))) 29srctree := $(patsubst %/,%,$(dir $(srctree))) 30endif 31 32RM ?= rm -f 33 34LIBSUBCMD_DIR = $(srctree)/tools/lib/subcmd/ 35ifneq ($(OUTPUT),) 36 LIBSUBCMD_OUTPUT = $(abspath $(OUTPUT))/libsubcmd 37else 38 LIBSUBCMD_OUTPUT = $(CURDIR)/libsubcmd 39endif 40LIBSUBCMD = $(LIBSUBCMD_OUTPUT)/libsubcmd.a 41 42OBJTOOL := $(OUTPUT)objtool 43OBJTOOL_IN := $(OBJTOOL)-in.o 44 45LIBELF_FLAGS := $(shell $(HOSTPKG_CONFIG) libelf --cflags 2>/dev/null) 46LIBELF_LIBS := $(shell $(HOSTPKG_CONFIG) libelf --libs 2>/dev/null || echo -lelf) 47 48all: $(OBJTOOL) 49 50WARNINGS := -Werror -Wall -Wextra -Wmissing-prototypes \ 51 -Wmissing-declarations -Wwrite-strings \ 52 -Wno-implicit-fallthrough -Wno-sign-compare \ 53 -Wno-unused-parameter 54 55INCLUDES := -I$(srctree)/tools/include \ 56 -I$(srctree)/tools/include/uapi \ 57 -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \ 58 -I$(srctree)/tools/arch/$(SRCARCH)/include \ 59 -I$(srctree)/tools/objtool/include \ 60 -I$(srctree)/tools/objtool/arch/$(SRCARCH)/include \ 61 -I$(LIBSUBCMD_OUTPUT)/include 62 63OBJTOOL_CFLAGS := -std=gnu11 -fomit-frame-pointer -O2 -g $(WARNINGS) \ 64 $(INCLUDES) $(LIBELF_FLAGS) $(LIBXXHASH_CFLAGS) $(HOSTCFLAGS) 65 66OBJTOOL_LDFLAGS := $(LIBSUBCMD) $(LIBELF_LIBS) $(LIBXXHASH_LIBS) $(HOSTLDFLAGS) 67 68# Allow old libelf to be used: 69elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(HOSTCC) $(OBJTOOL_CFLAGS) -x c -E - 2>/dev/null | grep elf_getshdr) 70OBJTOOL_CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED) 71 72# Always want host compilation. 73HOST_OVERRIDES := CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)" 74 75# 76# To support disassembly, objtool needs libopcodes which is provided 77# with libbfd (binutils-dev or binutils-devel package). 78# 79# We check using HOSTCC directly rather than the shared feature framework 80# because objtool is a host tool that links against host libraries. 81# 82# When using shared libraries, -lopcodes is sufficient as dependencies are 83# resolved automatically. With static libraries, we must explicitly link 84# against libopcodes' dependencies: libbfd, libiberty, and sometimes libz. 85# Try each combination and use the first one that succeeds. 86# 87LIBOPCODES_LIBS := $(shell \ 88 for libs in "-lopcodes" \ 89 "-lopcodes -lbfd" \ 90 "-lopcodes -lbfd -liberty" \ 91 "-lopcodes -lbfd -liberty -lz"; do \ 92 echo 'extern void disassemble_init_for_target(void *);' \ 93 'int main(void) { disassemble_init_for_target(0); return 0; }' | \ 94 $(HOSTCC) -xc - -o /dev/null $$libs 2>/dev/null && \ 95 echo "$$libs" && break; \ 96 done) 97 98# Styled disassembler support requires binutils >= 2.39 99HAVE_DISASM_STYLED := $(shell echo '$(pound)include <dis-asm.h>' | \ 100 $(HOSTCC) -E -xc - 2>/dev/null | grep -q disassembler_style && echo y) 101 102BUILD_DISAS := n 103 104ifneq ($(LIBOPCODES_LIBS),) 105 BUILD_DISAS := y 106 OBJTOOL_CFLAGS += -DDISAS -DPACKAGE='"objtool"' 107 OBJTOOL_LDFLAGS += $(LIBOPCODES_LIBS) 108ifeq ($(HAVE_DISASM_STYLED),y) 109 OBJTOOL_CFLAGS += -DDISASM_INIT_STYLED 110endif 111endif 112 113export BUILD_DISAS 114 115AWK = awk 116MKDIR = mkdir 117 118export srctree OUTPUT CFLAGS SRCARCH AWK 119include $(srctree)/tools/build/Makefile.include 120 121$(OBJTOOL_IN): fixdep $(LIBSUBCMD) FORCE 122 $(Q)$(CONFIG_SHELL) ./sync-check.sh 123 $(Q)$(MAKE) $(build)=objtool $(HOST_OVERRIDES) CFLAGS="$(OBJTOOL_CFLAGS)" \ 124 LDFLAGS="$(OBJTOOL_LDFLAGS)" 125 126 127$(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN) 128 $(QUIET_LINK)$(HOSTCC) $(OBJTOOL_IN) $(OBJTOOL_LDFLAGS) -o $@ 129 130 131$(LIBSUBCMD_OUTPUT): 132 $(Q)$(MKDIR) -p $@ 133 134$(LIBSUBCMD): fixdep $(LIBSUBCMD_OUTPUT) FORCE 135 $(Q)$(MAKE) -C $(LIBSUBCMD_DIR) O=$(LIBSUBCMD_OUTPUT) \ 136 DESTDIR=$(LIBSUBCMD_OUTPUT) prefix= subdir= \ 137 $(HOST_OVERRIDES) EXTRA_CFLAGS="$(OBJTOOL_CFLAGS)" \ 138 $@ install_headers 139 140$(LIBSUBCMD)-clean: 141 $(call QUIET_CLEAN, libsubcmd) 142 $(Q)$(RM) -r -- $(LIBSUBCMD_OUTPUT) 143 144clean: $(LIBSUBCMD)-clean 145 $(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL) 146 $(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete 147 $(Q)$(RM) $(OUTPUT)arch/x86/lib/cpu-feature-names.c $(OUTPUT)fixdep 148 $(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep 149 $(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.objtool 150 $(Q)$(RM) -r -- $(OUTPUT)feature 151 152FORCE: 153 154.PHONY: clean FORCE 155