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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: gTxGanC_PLNk6Cp8fvurHqYNODghYxXb X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTA4MDE1MSBTYWx0ZWRfX+h8v/6PDKP+Z jAdm1rpGv4OhJjZsh6igckQQoLJoC7k9srOWBrLXydyr1uM/ouNV0nG/uX0KMsRisoyR2/cj7Mb Hy2sciE8csHY6RSCpOx2nHtrmmW9Bn3O8HYVkQEH4zuSVA5NUU414f/b1P3dY2Y9XVnEpbCvJEP gZdPdvU+PEg2VuiKByiM4jecbnLFEgaHV5/AHo2rbC0Fn3xseCHAZ0BYnJpQACipja6Fj5ZcajM 9S0iR7edRavzStHw3Bl0kcStsnMxiBYTJV59jwjjZrHbhDEDVEGjtlhKJlGMl7XI9iVT6tVB69E /bcJ2zCAI+cma3BesLX1c2J13X5ouAGoXJs8yD7QAv6QzEAtvkL7oWFOsTBNu+FkE5yVjZH/1kZ OZGjxAMbcSHhLhthhYM2mHEV+LTIa+3ZOqkA9IE9Sq7oBPMJ8eRmrGM9/yOAAzelV4MYH0qfW5K 8wt2O27vBLIE4mVUxeA== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-08_02,2026-09-08_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 phishscore=0 spamscore=0 suspectscore=0 priorityscore=1501 bulkscore=0 impostorscore=0 malwarescore=0 lowpriorityscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609080151 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