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Tue, 8 Sep 2026 14:02:40 +0000 (GMT) Message-ID: <264436d6-4a2a-4fe7-8b10-bbbd69cf7fd5@linux.ibm.com> Date: Tue, 8 Sep 2026 19:32:37 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 17/24] powerpc/vdso: Enable the vdsocheck tool To: =?UTF-8?Q?Thomas_Wei=C3=9Fschuh?= , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , Andy Lutomirski , Vincenzo Frascino , Kees Cook , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Richard Weinberger , Anton Ivanov , Johannes Berg , Russell King , Catalin Marinas , Will Deacon , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Huacai Chen , WANG Xuerui , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Thomas Bogendoerfer , Miguel Ojeda , Alex Gaynor , Gary Guo , =?UTF-8?Q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Thomas Gleixner , Christophe Leroy , Boqun Feng , Nicolas Schier Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-mm@kvack.org, linux-um@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, linux-s390@vger.kernel.org, linux-mips@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-kbuild@vger.kernel.org, Jan Stancek , Arnaldo Carvalho de Melo , Alexandre Ghiti References: <20260908-vdso-absolute-reloc-v5-0-3a93791af1cf@linutronix.de> <20260908-vdso-absolute-reloc-v5-17-3a93791af1cf@linutronix.de> Content-Language: en-US From: R Nageswara Sastry In-Reply-To: <20260908-vdso-absolute-reloc-v5-17-3a93791af1cf@linutronix.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Authority-Analysis: v=2.4 cv=E7T9Y6dl c=1 sm=1 tr=0 ts=6aa015a0 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=0oLV-YkNZL8bY7TGgZYA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTA4MDE1MSBTYWx0ZWRfX3KyouA8o5rAD ByjA/dZC1Xn2n5rWH2E08Rby3F+ieH1b8xVcBpTsx0Pq3F1Kh8H6gO0eZ56x8axONjS0M7Vrmnn 1W+1YJV6A3rf0XXO5ICf/YfbKJvemH4= X-Proofpoint-ORIG-GUID: pTJswYdOioXws7GKWQycoAhrlwYXMjr- X-Proofpoint-GUID: 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 ZMjlsSBT xwQKKczECyPUDrb3hgzG9DQFPVKvhlxsdNb1y6EDkYvBY4M6xCXyFgE7wWs9neagiedIYLCXsXcccM4mxvmdkByLpIU8YqDEZ9Y7JrFavbQznuiefABSAFK+K1No/qxnAOwnFg9MPP0KUhBVBiiQ/kkpLt0BNwp7lvJJX6Wx4I3KKQ1By7vJhz27j3Ah4lBpPEAvMHjxz4fj6Pr0yeYKOYpsnBYMF2L8xDG7LeCrEmFCaz/SeKdeb1A16tiB6PQ3HjElQWeIli1JfAGr/FPcwOMvCeCxeAhZPKulH4/m9x3H48+YeXJO2fxzrQkY8ccA4AtZJsKxSDXdDoNOPljUvVR0J3Tmh6qF+fCDSpSdMbejjJnm2D5Y+z9Rd+RJQsXDcikqlfvgg/X7xqJHTpKUteTWLTxpSQoRQEdy/n6xRzSe2hsqMC3cTaul1UcD6SXo3IUBVyl0AgpOxA4vKG5VutzRz+dMm6RwUWXPD Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 08.09.2026 12:03 PM, Thomas Weißschuh wrote: > The vdsocheck tool validates the object files and final .so library. > It can detect if the compiler created relocations which are incompatible > with the vDSO which need to be worked around. > > Wire it up for the architecture. > > Signed-off-by: Thomas Weißschuh Tested-by: R Nageswara Sastry System: ppc64le LPAR (IBM POWER), Linux 7.3-rc2 > --- > arch/powerpc/Kconfig | 1 + > arch/powerpc/kernel/vdso/Makefile | 4 ++-- > lib/vdso/check/vdsocheck.rs | 27 +++++++++++++++++++++++++++ > 3 files changed, 30 insertions(+), 2 deletions(-) > > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig > index 2580e27e4328..f19e225cfc5c 100644 > --- a/arch/powerpc/Kconfig > +++ b/arch/powerpc/Kconfig > @@ -330,6 +330,7 @@ config PPC > select SYSCTL_EXCEPTION_TRACE > select THREAD_INFO_IN_TASK > select TRACE_IRQFLAGS_SUPPORT > + select VDSO_CHECK > select VDSO_DATASTORE > select VDSO_GETRANDOM > # > diff --git a/arch/powerpc/kernel/vdso/Makefile b/arch/powerpc/kernel/vdso/Makefile > index 368759f81708..ca20b91b4373 100644 > --- a/arch/powerpc/kernel/vdso/Makefile > +++ b/arch/powerpc/kernel/vdso/Makefile > @@ -81,9 +81,9 @@ targets += vdso64.lds > CPPFLAGS_vdso64.lds += -P -C > > # link rule for the .so file, .lds has to be first > -$(obj)/vdso32.so.dbg: $(obj)/vdso32.lds $(obj-vdso32) $(obj)/vgettimeofday-32.o $(obj)/vgetrandom-32.o $(obj)/crtsavres-32.o FORCE > +$(obj)/vdso32.so.dbg: $(obj)/vdso32.lds $(obj-vdso32) $(obj)/vgettimeofday-32.o $(obj)/vgetrandom-32.o $(obj)/crtsavres-32.o $(vdsocheck) FORCE > $(call if_changed,vdso32ld_and_check) > -$(obj)/vdso64.so.dbg: $(obj)/vdso64.lds $(obj-vdso64) $(obj)/vgettimeofday-64.o $(obj)/vgetrandom-64.o FORCE > +$(obj)/vdso64.so.dbg: $(obj)/vdso64.lds $(obj-vdso64) $(obj)/vgettimeofday-64.o $(obj)/vgetrandom-64.o $(vdsocheck) FORCE > $(call if_changed,vdso64ld_and_check) > > # assembly rules for the .S files > diff --git a/lib/vdso/check/vdsocheck.rs b/lib/vdso/check/vdsocheck.rs > index e45a1fbc6829..429bdcd65818 100644 > --- a/lib/vdso/check/vdsocheck.rs > +++ b/lib/vdso/check/vdsocheck.rs > @@ -69,6 +69,33 @@ fn allowed_relocations_for_machine(machine: u16) -> Option ..Default::default() > } > .into(), > + bindings::EM_PPC => AllowedRelocations { > + in_object_file: &[ > + bindings::R_PPC_REL24, > + bindings::R_PPC_REL14, > + bindings::R_PPC_REL32, > + bindings::R_PPC_REL16, > + bindings::R_PPC_REL16_LO, > + bindings::R_PPC_REL16_HI, > + bindings::R_PPC_REL16_HA, > + ], > + ..Default::default() > + } > + .into(), > + bindings::EM_PPC64 => AllowedRelocations { > + in_object_file: &[ > + bindings::R_PPC64_REL24, > + bindings::R_PPC64_REL14, > + bindings::R_PPC64_REL32, > + bindings::R_PPC64_REL64, > + bindings::R_PPC64_REL16, > + bindings::R_PPC64_REL16_LO, > + bindings::R_PPC64_REL16_HI, > + bindings::R_PPC64_REL16_HA, > + ], > + ..Default::default() > + } > + .into(), > _ => None, > } > } > -- Thanks and Regards R.Nageswara Sastry