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Tue, 5 May 2026 08:47:08 +0000 (GMT) From: Sathvika Vasireddy To: nathan@kernel.org, nsc@kernel.org, maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com, chleroy@kernel.org, jpoimboe@kernel.org, peterz@infradead.org, ojeda@kernel.org, masahiroy@kernel.org, lossin@kernel.org, tamird@kernel.org, thomas.weissschuh@linutronix.de, rostedt@goodmis.org, ihor.solodrai@linux.dev, thuth@redhat.com, pmladek@suse.com, aliceryhl@google.com, elver@google.com, kees@kernel.org, legion@kernel.org, ardb@kernel.org, yuxuan.zuo@outlook.com, alexghiti@rivosinc.com, alexandre.chartre@oracle.com, bp@alien8.de, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, sv@linux.ibm.com Subject: [PATCH v1 5/6] kbuild: Add objtool integration for PowerPC feature fixups Date: Tue, 5 May 2026 14:16:27 +0530 Message-ID: <20260505084628.17940-6-sv@linux.ibm.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20260505084628.17940-1-sv@linux.ibm.com> References: <20260505084628.17940-1-sv@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTA1MDA3OSBTYWx0ZWRfXw4clIekf2zU5 tl2yuTx8xdFPTcA2m968eoLvCFIDNZn/yAG1ldEB79sTgJfrNCr0rOGM0cjTTQa6Os4vf1Qgx+j VjnaRpmCtszxqitq4HV51hPV9ejZpxJagDtaLzOSwczH8RYSNyuZ44uoO+oIJXmumJPLH6T86e2 RZ9m8hdyZ6BmJmMd6UCtWQqSzecYQoaNZkVSYjwSyOOIxdROihI5yyyhDg+KMNXcJlZ1RkfnE5Q x1vetrp8BacC5REkP3HEl+Bsy34FBmkovWm7YvL68INZC+ifkK4wk1QNr4ViyBxm+uPcnVwJS5z aQ/pahTFkkX7JZoddAkHZ71qA9eHzfJRTQwErWajDyvQzCX3GgCcmVfl0BScMd9RITPIfYc0yij Jgm22zXOcobCGfINGKKxW/1GCYnN9JEfNKfdXNzEArr5zQS+v4ZUA5cHfKuG7Anyv9zmDinJv/U r3tGYgICEP/gpvRwM8g== X-Proofpoint-ORIG-GUID: Z7cqhmyMOoiJMxjm3OfMv1vC4h2CzN55 X-Proofpoint-GUID: 3t84d6iLD2PUGGdH1yCve10RJv9vnqYC X-Authority-Analysis: v=2.4 cv=ctWrVV4i c=1 sm=1 tr=0 ts=69f9ae97 cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=k1iL6ZPSiERSBASioQUA:9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-05_02,2026-04-30_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 lowpriorityscore=0 adultscore=0 clxscore=1015 suspectscore=0 impostorscore=0 spamscore=0 malwarescore=0 phishscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2605050079 Add build system support for PowerPC feature fixup processing: - Add HAVE_OBJTOOL_FTR_FIXUP config option for architectures that support build-time feature fixup processing - Integrate objtool feature fixup processing into vmlinux build Suggested-by: Masahiro Yamada Signed-off-by: Sathvika Vasireddy Acked-by: Nicolas Schier # kbuild --- Makefile | 7 +++++++ scripts/Makefile.lib | 4 ++-- scripts/Makefile.vmlinux | 3 ++- 3 files changed, 11 insertions(+), 3 deletions(-) diff --git a/Makefile b/Makefile index 6b1d9fb1a6b4..f9a990036f3f 100644 --- a/Makefile +++ b/Makefile @@ -1478,6 +1478,13 @@ ifdef CONFIG_OBJTOOL prepare: tools/objtool endif +# CONFIG_OBJTOOL and CONFIG_HAVE_OBJTOOL_FTR_FIXUP are unrelated, separate +# options. It was integrated in objtool in order to borrow the elf parser, +# but this is different from how the other objtool commands are used. +ifdef CONFIG_HAVE_OBJTOOL_FTR_FIXUP +prepare: tools/objtool +endif + ifdef CONFIG_BPF ifdef CONFIG_DEBUG_INFO_BTF prepare: tools/bpf/resolve_btfids diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 0718e39cedda..fa72619e5bb0 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -179,10 +179,10 @@ cpp_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ ld_flags = $(KBUILD_LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) -ifdef CONFIG_OBJTOOL - objtool := $(objtree)/tools/objtool/objtool +ifdef CONFIG_OBJTOOL + objtool-args-$(CONFIG_HAVE_JUMP_LABEL_HACK) += --hacks=jump_label objtool-args-$(CONFIG_HAVE_NOINSTR_HACK) += --hacks=noinstr objtool-args-$(CONFIG_MITIGATION_CALL_DEPTH_TRACKING) += --hacks=skylake diff --git a/scripts/Makefile.vmlinux b/scripts/Makefile.vmlinux index fcae1e432d9a..a1bef0638ecb 100644 --- a/scripts/Makefile.vmlinux +++ b/scripts/Makefile.vmlinux @@ -65,7 +65,8 @@ ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) # Final link of vmlinux with optional arch pass after final link cmd_link_vmlinux = \ $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)" "$@"; \ - $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) + $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true); \ + $(if $(CONFIG_HAVE_OBJTOOL_FTR_FIXUP), $(objtool) --ftr-fixup --link $@, true) targets += vmlinux.unstripped .vmlinux.export.o vmlinux.unstripped: scripts/link-vmlinux.sh vmlinux.o .vmlinux.export.o $(KBUILD_LDS) FORCE -- 2.43.0