From: Ard Biesheuvel <ardb@kernel.org> To: Xi Ruoyao <xry111@xry111.site> Cc: 陈华才 <chenhuacai@loongson.cn>, linux-efi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, "James E.J. Bottomley" <James.Bottomley@hansenpartnership.com>, "Matthew Garrett" <mjg59@srcf.ucam.org>, "Peter Jones" <pjones@redhat.com>, "Ilias Apalodimas" <ilias.apalodimas@linaro.org>, "Heinrich Schuchardt" <heinrich.schuchardt@canonical.com>, "AKASHI Takahiro" <takahiro.akashi@linaro.org>, "Palmer Dabbelt" <palmer@dabbelt.com>, "Atish Patra" <atishp@atishpatra.org>, "Arnd Bergmann" <arnd@arndb.de>, "Lennart Poettering" <lennart@poettering.net>, "Jeremy Linton" <jeremy.linton@arm.com> Subject: Re: [PATCH v4 8/9] loongarch: avoid orphan input sections Date: Sun, 28 Aug 2022 11:36:52 +0200 [thread overview] Message-ID: <CAMj1kXGHLans85vpGzY6FbdW0w5DZ0uqT7eEk2yava=udUHY1w@mail.gmail.com> (raw) In-Reply-To: <adb55eda511ad6de85936dd37f584687a22e7437.camel@xry111.site> On Sun, 28 Aug 2022 at 05:31, Xi Ruoyao <xry111@xry111.site> wrote: > > On Sat, 2022-08-27 at 15:27 +0200, Ard Biesheuvel wrote: > > It does have a relation: the signing tool will complain because the > > PE/COFF metadata goes out of sync, like so > > > > SBSIGN arch/loongarch/boot/vmlinux.efi.signed > > warning: data remaining[20754944 vs 20755016]: gaps between PE/COFF > > sections? > > > > This is because of the *(.rela.dyn) section created by the linker, > > which is appended after the .data section, and so the PE/COFF .data > > section size does not match the file size. > > > > *However*, you explained to me that vmlinux is not a PIC binary, and > > the link should be non-PIE as well. So this looks like another > > toolchain issue to me, that you may want to look into. > > In my builds: > > With Binutils 2.39 and GCC 12, vmlinux rela.dyn contains 48 zero bytes > (or 3 R_LARCH_NONE relocations, which is defined "do thing" and is > ignored by ld, ld.so, and kernel module loader). > But does the ELF psABI for LoongArch describe L_ARCH_NONE as a dynamic relocation? .rela.dyn typically only contains relocations that are specified as being suitable for runtime relocation. > With Binutils trunk and GCC trunk, rela.dyn does not exist in > vmlinux.(But for using the trunks of Binutils and GCC we'll need to > either disable CONFIG_MODULES or apply [1].) > If this is going to land in v6.1 as well, I suggest to drop the patch entirely. By the time this gets released, you can document which minimal toolchain version is required for UEFI secure boot signed kernels. > [1]:https://lore.kernel.org/loongarch/20220827175436.156464-1-xry111@xry111.site/T/ > > -- > Xi Ruoyao <xry111@xry111.site> > School of Aerospace Science and Technology, Xidian University
WARNING: multiple messages have this Message-ID (diff)
From: Ard Biesheuvel <ardb@kernel.org> To: Xi Ruoyao <xry111@xry111.site> Cc: 陈华才 <chenhuacai@loongson.cn>, linux-efi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, "James E.J. Bottomley" <James.Bottomley@hansenpartnership.com>, "Matthew Garrett" <mjg59@srcf.ucam.org>, "Peter Jones" <pjones@redhat.com>, "Ilias Apalodimas" <ilias.apalodimas@linaro.org>, "Heinrich Schuchardt" <heinrich.schuchardt@canonical.com>, "AKASHI Takahiro" <takahiro.akashi@linaro.org>, "Palmer Dabbelt" <palmer@dabbelt.com>, "Atish Patra" <atishp@atishpatra.org>, "Arnd Bergmann" <arnd@arndb.de>, "Lennart Poettering" <lennart@poettering.net>, "Jeremy Linton" <jeremy.linton@arm.com> Subject: Re: [PATCH v4 8/9] loongarch: avoid orphan input sections Date: Sun, 28 Aug 2022 11:36:52 +0200 [thread overview] Message-ID: <CAMj1kXGHLans85vpGzY6FbdW0w5DZ0uqT7eEk2yava=udUHY1w@mail.gmail.com> (raw) In-Reply-To: <adb55eda511ad6de85936dd37f584687a22e7437.camel@xry111.site> On Sun, 28 Aug 2022 at 05:31, Xi Ruoyao <xry111@xry111.site> wrote: > > On Sat, 2022-08-27 at 15:27 +0200, Ard Biesheuvel wrote: > > It does have a relation: the signing tool will complain because the > > PE/COFF metadata goes out of sync, like so > > > > SBSIGN arch/loongarch/boot/vmlinux.efi.signed > > warning: data remaining[20754944 vs 20755016]: gaps between PE/COFF > > sections? > > > > This is because of the *(.rela.dyn) section created by the linker, > > which is appended after the .data section, and so the PE/COFF .data > > section size does not match the file size. > > > > *However*, you explained to me that vmlinux is not a PIC binary, and > > the link should be non-PIE as well. So this looks like another > > toolchain issue to me, that you may want to look into. > > In my builds: > > With Binutils 2.39 and GCC 12, vmlinux rela.dyn contains 48 zero bytes > (or 3 R_LARCH_NONE relocations, which is defined "do thing" and is > ignored by ld, ld.so, and kernel module loader). > But does the ELF psABI for LoongArch describe L_ARCH_NONE as a dynamic relocation? .rela.dyn typically only contains relocations that are specified as being suitable for runtime relocation. > With Binutils trunk and GCC trunk, rela.dyn does not exist in > vmlinux.(But for using the trunks of Binutils and GCC we'll need to > either disable CONFIG_MODULES or apply [1].) > If this is going to land in v6.1 as well, I suggest to drop the patch entirely. By the time this gets released, you can document which minimal toolchain version is required for UEFI secure boot signed kernels. > [1]:https://lore.kernel.org/loongarch/20220827175436.156464-1-xry111@xry111.site/T/ > > -- > Xi Ruoyao <xry111@xry111.site> > School of Aerospace Science and Technology, Xidian University _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-08-28 9:37 UTC|newest] Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-08-27 8:38 [PATCH v4 0/9] efi: implement generic compressed boot support Ard Biesheuvel 2022-08-27 8:38 ` Ard Biesheuvel 2022-08-27 8:38 ` [PATCH v4 1/9] efi: name the ARCH-stub.c files uniformly Ard Biesheuvel 2022-08-27 8:38 ` Ard Biesheuvel 2022-08-27 8:38 ` [PATCH v4 2/9] efi/libstub: add some missing EFI prototypes Ard Biesheuvel 2022-08-27 8:38 ` Ard Biesheuvel 2022-08-27 8:38 ` [PATCH v4 3/9] efi/libstub: use EFI provided memcpy/memset routines Ard Biesheuvel 2022-08-27 8:38 ` Ard Biesheuvel 2022-08-27 8:38 ` [PATCH v4 4/9] efi/libstub: move efi_system_table global var into separate object Ard Biesheuvel 2022-08-27 8:38 ` Ard Biesheuvel 2022-08-27 8:38 ` [PATCH v4 5/9] efi/libstub: implement generic EFI zboot Ard Biesheuvel 2022-08-27 8:38 ` Ard Biesheuvel 2022-08-27 8:38 ` [PATCH v4 6/9] arm64: efi: enable generic EFI compressed boot Ard Biesheuvel 2022-08-27 8:38 ` Ard Biesheuvel 2022-08-31 22:05 ` Jeremy Linton 2022-08-31 22:05 ` Jeremy Linton 2022-09-01 0:48 ` Xi Ruoyao 2022-09-01 0:48 ` Xi Ruoyao 2022-08-27 8:38 ` [PATCH v4 7/9] riscv: " Ard Biesheuvel 2022-08-27 8:38 ` Ard Biesheuvel 2022-08-27 8:38 ` [PATCH v4 8/9] loongarch: avoid orphan input sections Ard Biesheuvel 2022-08-27 8:38 ` Ard Biesheuvel 2022-08-27 10:15 ` 陈华才 2022-08-27 10:15 ` 陈华才 2022-08-27 13:27 ` Ard Biesheuvel 2022-08-27 13:27 ` Ard Biesheuvel 2022-08-28 3:31 ` Xi Ruoyao 2022-08-28 3:31 ` Xi Ruoyao 2022-08-28 9:36 ` Ard Biesheuvel [this message] 2022-08-28 9:36 ` Ard Biesheuvel 2022-08-28 9:44 ` Xi Ruoyao 2022-08-28 9:44 ` Xi Ruoyao 2022-08-29 3:59 ` 陈华才 2022-08-29 3:59 ` 陈华才 2022-08-27 8:38 ` [PATCH v4 9/9] loongarch: efi: enable generic EFI compressed boot Ard Biesheuvel 2022-08-27 8:38 ` Ard Biesheuvel 2022-08-28 9:52 ` Xi Ruoyao 2022-08-28 9:52 ` Xi Ruoyao 2022-08-28 10:57 ` Xi Ruoyao 2022-08-28 10:57 ` Xi Ruoyao 2022-08-29 8:13 ` 陈华才 2022-08-29 8:13 ` 陈华才
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