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[193.116.106.251]) by smtp.gmail.com with ESMTPSA id p17-20020a170902e75100b0017e64da44c5sm1595134plf.203.2022.10.31.05.07.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 31 Oct 2022 05:07:52 -0700 (PDT) From: Nicholas Piggin To: linux-modules@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v5 2/2] powerpc/64: Add module check for ELF ABI version Date: Mon, 31 Oct 2022 22:07:33 +1000 Message-Id: <20221031120733.3956781-3-npiggin@gmail.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20221031120733.3956781-1-npiggin@gmail.com> References: <20221031120733.3956781-1-npiggin@gmail.com> MIME-Version: 1.0 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Luis Chamberlain , linux-kernel@vger.kernel.org, Nicholas Piggin , Jessica Yu Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Override the generic module ELF check to provide a check for the ELF ABI version. This becomes important if we allow big-endian ELF ABI V2 builds but it doesn't hurt to check now. Cc: Jessica Yu Signed-off-by: Michael Ellerman [np: split patch, added changelog, adjust to Jessica's proposal] Signed-off-by: Nicholas Piggin --- arch/powerpc/kernel/module.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/powerpc/kernel/module.c b/arch/powerpc/kernel/module.c index f6d6ae0a1692..d46bf9bfda26 100644 --- a/arch/powerpc/kernel/module.c +++ b/arch/powerpc/kernel/module.c @@ -19,6 +19,23 @@ static LIST_HEAD(module_bug_list); +#ifdef CONFIG_PPC64 +bool module_elf_check_arch(Elf_Ehdr *hdr) +{ + unsigned long abi_level = hdr->e_flags & 0x3; + + if (IS_ENABLED(CONFIG_PPC64_ELF_ABI_V2)) { + if (abi_level != 2) + return false; + } else { + if (abi_level >= 2) + return false; + } + + return true; +} +#endif + static const Elf_Shdr *find_section(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, const char *name)