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Wed, 17 Jul 2024 06:14:03 -0700 (PDT) Received: from localhost ([140.82.166.162]) by smtp.gmail.com with ESMTPSA id 8926c6da1cb9f-4c210f7c4c8sm651830173.130.2024.07.17.06.14.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 Jul 2024 06:14:03 -0700 (PDT) Date: Wed, 17 Jul 2024 08:14:02 -0500 From: Andrew Jones To: sunying@isrc.iscas.ac.cn Cc: ebiederm@xmission.com, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, kexec@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, zhuhengbo@iscas.ac.cn, Petr Tesarik Subject: Re: [PATCH v1] riscv/kexec_file: Fix relocation type R_RISCV_ADD16 and R_RISCV_SUB16 unknown Message-ID: <20240717-c761f5af7369cdeba5b9c759@orel> References: <20240711083236.2859632-1-sunying@isrc.iscas.ac.cn> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20240711083236.2859632-1-sunying@isrc.iscas.ac.cn> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240717_061406_234462_A487B8C6 X-CRM114-Status: GOOD ( 14.23 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On Thu, Jul 11, 2024 at 08:32:36AM GMT, sunying@isrc.iscas.ac.cn wrote: > From: Ying Sun > > Runs on the kernel with CONFIG_RISCV_ALTERNATIVE enabled: > kexec -sl vmlinux > > Error: > kexec_image: Unknown rela relocation: 34 > kexec_image: Error loading purgatory ret=-8 > and > kexec_image: Unknown rela relocation: 38 > kexec_image: Error loading purgatory ret=-8 > > The purgatory code uses the 16-bit addition and subtraction relocation > type, but not handled, resulting in kexec_file_load failure. > So add handle to arch_kexec_apply_relocations_add(). > > Tested on RISC-V64 Qemu-virt, issue fixed. > > Co-developed-by: Petr Tesarik > Signed-off-by: Petr Tesarik > Signed-off-by: Ying Sun > --- > arch/riscv/kernel/elf_kexec.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/arch/riscv/kernel/elf_kexec.c b/arch/riscv/kernel/elf_kexec.c > index 11c0d2e0becf..3c37661801f9 100644 > --- a/arch/riscv/kernel/elf_kexec.c > +++ b/arch/riscv/kernel/elf_kexec.c > @@ -451,6 +451,12 @@ int arch_kexec_apply_relocations_add(struct purgatory_info *pi, > *(u32 *)loc = CLEAN_IMM(CJTYPE, *(u32 *)loc) | > ENCODE_CJTYPE_IMM(val - addr); > break; > + case R_RISCV_ADD16: > + *(u16 *)loc += val; > + break; > + case R_RISCV_SUB16: > + *(u16 *)loc -= val; > + break; > case R_RISCV_ADD32: > *(u32 *)loc += val; > break; > -- > 2.34.1 > Reviewed-by: Andrew Jones _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv