1# SPDX-License-Identifier: GPL-2.0 2include ../scripts/Makefile.include 3include ../scripts/Makefile.arch 4 5ifeq ($(ARCH),x86_64) 6ARCH := x86 7endif 8 9# always use the host compiler 10CC = gcc 11LD = ld 12AR = ar 13 14ifeq ($(srctree),) 15srctree := $(patsubst %/,%,$(dir $(CURDIR))) 16srctree := $(patsubst %/,%,$(dir $(srctree))) 17endif 18 19SUBCMD_SRCDIR = $(srctree)/tools/lib/subcmd/ 20LIBSUBCMD_OUTPUT = $(if $(OUTPUT),$(OUTPUT),$(CURDIR)/) 21LIBSUBCMD = $(LIBSUBCMD_OUTPUT)libsubcmd.a 22 23OBJTOOL := $(OUTPUT)objtool 24OBJTOOL_IN := $(OBJTOOL)-in.o 25 26all: $(OBJTOOL) 27 28INCLUDES := -I$(srctree)/tools/include \ 29 -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \ 30 -I$(srctree)/tools/objtool/arch/$(HOSTARCH)/include 31WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed 32CFLAGS += -Wall -Werror $(WARNINGS) -fomit-frame-pointer -O2 -g $(INCLUDES) 33LDFLAGS += -lelf $(LIBSUBCMD) 34 35# Allow old libelf to be used: 36elfshdr := $(shell echo '\#include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr) 37CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED) 38 39AWK = awk 40export srctree OUTPUT CFLAGS SRCARCH AWK 41include $(srctree)/tools/build/Makefile.include 42 43$(OBJTOOL_IN): fixdep FORCE 44 @$(MAKE) $(build)=objtool 45 46# Busybox's diff doesn't have -I, avoid warning in that case 47# 48$(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN) 49 @(diff -I 2>&1 | grep -q 'option requires an argument' && \ 50 test -d ../../kernel -a -d ../../tools -a -d ../objtool && (( \ 51 diff arch/x86/lib/insn.c ../../arch/x86/lib/insn.c >/dev/null && \ 52 diff arch/x86/lib/inat.c ../../arch/x86/lib/inat.c >/dev/null && \ 53 diff arch/x86/lib/x86-opcode-map.txt ../../arch/x86/lib/x86-opcode-map.txt >/dev/null && \ 54 diff arch/x86/tools/gen-insn-attr-x86.awk ../../arch/x86/tools/gen-insn-attr-x86.awk >/dev/null && \ 55 diff arch/x86/include/asm/insn.h ../../arch/x86/include/asm/insn.h >/dev/null && \ 56 diff arch/x86/include/asm/inat.h ../../arch/x86/include/asm/inat.h >/dev/null && \ 57 diff arch/x86/include/asm/inat_types.h ../../arch/x86/include/asm/inat_types.h >/dev/null) \ 58 || echo "warning: objtool: x86 instruction decoder differs from kernel" >&2 )) || true 59 @(test -d ../../kernel -a -d ../../tools -a -d ../objtool && (( \ 60 diff ../../arch/x86/include/asm/orc_types.h arch/x86/include/asm/orc_types.h >/dev/null) \ 61 || echo "warning: objtool: orc_types.h differs from kernel" >&2 )) || true 62 $(QUIET_LINK)$(CC) $(OBJTOOL_IN) $(LDFLAGS) -o $@ 63 64 65$(LIBSUBCMD): fixdep FORCE 66 $(Q)$(MAKE) -C $(SUBCMD_SRCDIR) OUTPUT=$(LIBSUBCMD_OUTPUT) 67 68clean: 69 $(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL) 70 $(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete 71 $(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep 72 73FORCE: 74 75.PHONY: clean FORCE 76