diff options
Diffstat (limited to 'tools/objtool/Makefile')
| -rw-r--r-- | tools/objtool/Makefile | 103 |
1 files changed, 83 insertions, 20 deletions
diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile index 7a65948892e5..b71d1886022e 100644 --- a/tools/objtool/Makefile +++ b/tools/objtool/Makefile @@ -2,11 +2,35 @@ 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) $(HOSTCFLAGS) -xc - -o /dev/null -lxxhash 2> /dev/null && echo y || echo n) + ifeq ($(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 +RM ?= rm -f + LIBSUBCMD_DIR = $(srctree)/tools/lib/subcmd/ ifneq ($(OUTPUT),) LIBSUBCMD_OUTPUT = $(abspath $(OUTPUT))/libsubcmd @@ -23,6 +47,11 @@ LIBELF_LIBS := $(shell $(HOSTPKG_CONFIG) libelf --libs 2>/dev/null || echo -lel 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/$(HOSTARCH)/include/uapi \ @@ -30,33 +59,62 @@ INCLUDES := -I$(srctree)/tools/include \ -I$(srctree)/tools/objtool/include \ -I$(srctree)/tools/objtool/arch/$(SRCARCH)/include \ -I$(LIBSUBCMD_OUTPUT)/include -# Note, EXTRA_WARNINGS here was determined for CC and not HOSTCC, it -# is passed here to match a legacy behavior. -WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed -Wno-nested-externs -OBJTOOL_CFLAGS := -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS) -OBJTOOL_LDFLAGS := $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS) + +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 - | grep elf_getshdr) +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)" -AWK = awk -MKDIR = mkdir - -BUILD_ORC := n - -ifeq ($(SRCARCH),x86) - BUILD_ORC := y +# +# 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 - -ifeq ($(SRCARCH),loongarch) - BUILD_ORC := y endif -export BUILD_ORC +export BUILD_DISAS + +AWK = awk +MKDIR = mkdir + export srctree OUTPUT CFLAGS SRCARCH AWK include $(srctree)/tools/build/Makefile.include @@ -84,10 +142,15 @@ $(LIBSUBCMD)-clean: $(Q)$(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)find $(OUTPUT) \( -name '*.o' -o -name '\.*.cmd' -o -name '\.*.d' \) -type f -print | xargs $(RM) + $(Q)$(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 + +mrproper: clean + $(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL) FORCE: -.PHONY: clean FORCE +.PHONY: clean mrproper FORCE |