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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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5995330382
objtool executes the objdump command to disassemble code. Use libopcodes instead to have more control about the disassembly scope and output. If libopcodes is not present then objtool is built without disassembly support. Signed-off-by: Alexandre Chartre <alexandre.chartre@oracle.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Josh Poimboeuf <jpoimboe@kernel.org> Link: https://patch.msgid.link/20251121095340.464045-4-alexandre.chartre@oracle.com
135 lines
3.8 KiB
Makefile
135 lines
3.8 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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include ../scripts/Makefile.include
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include ../scripts/Makefile.arch
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ifeq ($(SRCARCH),x86)
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BUILD_ORC := y
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ARCH_HAS_KLP := y
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endif
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ifeq ($(SRCARCH),loongarch)
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BUILD_ORC := y
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endif
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ifeq ($(ARCH_HAS_KLP),y)
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HAVE_XXHASH = $(shell printf "$(pound)include <xxhash.h>\nXXH3_state_t *state;int main() {}" | \
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$(HOSTCC) -xc - -o /dev/null -lxxhash 2> /dev/null && echo y || echo n)
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ifeq ($(HAVE_XXHASH),y)
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BUILD_KLP := y
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LIBXXHASH_CFLAGS := $(shell $(HOSTPKG_CONFIG) libxxhash --cflags 2>/dev/null) \
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-DBUILD_KLP
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LIBXXHASH_LIBS := $(shell $(HOSTPKG_CONFIG) libxxhash --libs 2>/dev/null || echo -lxxhash)
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endif
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endif
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export BUILD_ORC BUILD_KLP
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ifeq ($(srctree),)
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srctree := $(patsubst %/,%,$(dir $(CURDIR)))
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srctree := $(patsubst %/,%,$(dir $(srctree)))
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endif
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LIBSUBCMD_DIR = $(srctree)/tools/lib/subcmd/
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ifneq ($(OUTPUT),)
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LIBSUBCMD_OUTPUT = $(abspath $(OUTPUT))/libsubcmd
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else
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LIBSUBCMD_OUTPUT = $(CURDIR)/libsubcmd
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endif
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LIBSUBCMD = $(LIBSUBCMD_OUTPUT)/libsubcmd.a
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OBJTOOL := $(OUTPUT)objtool
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OBJTOOL_IN := $(OBJTOOL)-in.o
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LIBELF_FLAGS := $(shell $(HOSTPKG_CONFIG) libelf --cflags 2>/dev/null)
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LIBELF_LIBS := $(shell $(HOSTPKG_CONFIG) libelf --libs 2>/dev/null || echo -lelf)
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all: $(OBJTOOL)
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WARNINGS := -Werror -Wall -Wextra -Wmissing-prototypes \
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-Wmissing-declarations -Wwrite-strings \
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-Wno-implicit-fallthrough -Wno-sign-compare \
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-Wno-unused-parameter
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INCLUDES := -I$(srctree)/tools/include \
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-I$(srctree)/tools/include/uapi \
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-I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
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-I$(srctree)/tools/arch/$(SRCARCH)/include \
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-I$(srctree)/tools/objtool/include \
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-I$(srctree)/tools/objtool/arch/$(SRCARCH)/include \
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-I$(LIBSUBCMD_OUTPUT)/include
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OBJTOOL_CFLAGS := -std=gnu11 -fomit-frame-pointer -O2 -g $(WARNINGS) \
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$(INCLUDES) $(LIBELF_FLAGS) $(LIBXXHASH_CFLAGS) $(HOSTCFLAGS)
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OBJTOOL_LDFLAGS := $(LIBSUBCMD) $(LIBELF_LIBS) $(LIBXXHASH_LIBS) $(HOSTLDFLAGS)
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# Allow old libelf to be used:
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elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(HOSTCC) $(OBJTOOL_CFLAGS) -x c -E - 2>/dev/null | grep elf_getshdr)
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OBJTOOL_CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
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# Always want host compilation.
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HOST_OVERRIDES := CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)"
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#
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# To support disassembly, objtool needs libopcodes which is provided
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# with libbdf (binutils-dev or binutils-devel package).
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#
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FEATURE_USER = .objtool
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FEATURE_TESTS = libbfd disassembler-init-styled
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FEATURE_DISPLAY =
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include $(srctree)/tools/build/Makefile.feature
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ifeq ($(feature-disassembler-init-styled), 1)
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OBJTOOL_CFLAGS += -DDISASM_INIT_STYLED
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endif
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BUILD_DISAS := n
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ifeq ($(feature-libbfd),1)
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BUILD_DISAS := y
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OBJTOOL_CFLAGS += -DDISAS
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OBJTOOL_LDFLAGS += -lopcodes
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endif
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export BUILD_DISAS
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AWK = awk
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MKDIR = mkdir
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export srctree OUTPUT CFLAGS SRCARCH AWK
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include $(srctree)/tools/build/Makefile.include
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$(OBJTOOL_IN): fixdep $(LIBSUBCMD) FORCE
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$(Q)$(CONFIG_SHELL) ./sync-check.sh
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$(Q)$(MAKE) $(build)=objtool $(HOST_OVERRIDES) CFLAGS="$(OBJTOOL_CFLAGS)" \
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LDFLAGS="$(OBJTOOL_LDFLAGS)"
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$(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)
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$(QUIET_LINK)$(HOSTCC) $(OBJTOOL_IN) $(OBJTOOL_LDFLAGS) -o $@
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$(LIBSUBCMD_OUTPUT):
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$(Q)$(MKDIR) -p $@
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$(LIBSUBCMD): fixdep $(LIBSUBCMD_OUTPUT) FORCE
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$(Q)$(MAKE) -C $(LIBSUBCMD_DIR) O=$(LIBSUBCMD_OUTPUT) \
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DESTDIR=$(LIBSUBCMD_OUTPUT) prefix= subdir= \
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$(HOST_OVERRIDES) EXTRA_CFLAGS="$(OBJTOOL_CFLAGS)" \
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$@ install_headers
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$(LIBSUBCMD)-clean:
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$(call QUIET_CLEAN, libsubcmd)
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$(Q)$(RM) -r -- $(LIBSUBCMD_OUTPUT)
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clean: $(LIBSUBCMD)-clean
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$(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL)
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$(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
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$(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep
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$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.objtool
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$(Q)$(RM) -r -- $(OUTPUT)feature
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FORCE:
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.PHONY: clean FORCE
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