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| author | Alexandre Chartre <alexandre.chartre@oracle.com> | 2025-11-21 10:53:13 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-11-21 15:30:07 +0100 |
| commit | 59953303827eceb06d486ba66cc0d71f55ded8ec (patch) | |
| tree | c3394bfb901681fe576699d359d5edad48cb88b7 /tools/objtool/Makefile | |
| parent | 1013f2e37bec39b1df5679e1c1e2572ece87c088 (diff) | |
objtool: Disassemble code with libopcodes instead of running objdump
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
Diffstat (limited to 'tools/objtool/Makefile')
| -rw-r--r-- | tools/objtool/Makefile | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile index 021f55b7bd87..df793ca6fc1a 100644 --- a/tools/objtool/Makefile +++ b/tools/objtool/Makefile @@ -70,6 +70,29 @@ OBJTOOL_CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED) # Always want host compilation. HOST_OVERRIDES := CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)" +# +# To support disassembly, objtool needs libopcodes which is provided +# with libbdf (binutils-dev or binutils-devel package). +# +FEATURE_USER = .objtool +FEATURE_TESTS = libbfd disassembler-init-styled +FEATURE_DISPLAY = +include $(srctree)/tools/build/Makefile.feature + +ifeq ($(feature-disassembler-init-styled), 1) + OBJTOOL_CFLAGS += -DDISASM_INIT_STYLED +endif + +BUILD_DISAS := n + +ifeq ($(feature-libbfd),1) + BUILD_DISAS := y + OBJTOOL_CFLAGS += -DDISAS + OBJTOOL_LDFLAGS += -lopcodes +endif + +export BUILD_DISAS + AWK = awk MKDIR = mkdir @@ -103,6 +126,8 @@ clean: $(LIBSUBCMD)-clean $(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL) $(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete $(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep + $(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.objtool + $(Q)$(RM) -r -- $(OUTPUT)feature FORCE: |