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