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[59.124.168.89]) by smtp.gmail.com with ESMTPSA id i17-20020a635411000000b0053423447a12sm5123697pgb.73.2023.06.15.00.23.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 15 Jun 2023 00:23:06 -0700 (PDT) From: Nylon Chen To: linux-kernel@vger.kernel.org Cc: linux-riscv@lists.infradead.org, jszhang@kernel.org, ajones@ventanamicro.com, conor.dooley@microchip.com, aou@eecs.berkeley.edu, palmer@dabbelt.com, paul.walmsley@sifive.com, greentime.hu@sifive.com, zong.li@sifive.com, nylon7717@gmail.com, Nylon Chen Subject: [PATCH v2] RISC-V: Support 32_PCREL relocation type in kernel module Date: Thu, 15 Jun 2023 15:23:02 +0800 Message-Id: <20230615072302.25638-1-nylon.chen@sifive.com> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Fix the 'unsupported relocation type' error caused by enabling the -fasynchronous-unwind-tables flag, which generates relocation types that are not supported. Signed-off-by: Nylon Chen Reviewed-by: Zong Li --- Changed in v2: - add commit message. arch/riscv/kernel/module.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/riscv/kernel/module.c b/arch/riscv/kernel/module.c index 7c651d55fcbd..65be0360a494 100644 --- a/arch/riscv/kernel/module.c +++ b/arch/riscv/kernel/module.c @@ -310,6 +310,15 @@ static int apply_r_riscv_sub64_rela(struct module *me,= u32 *location, return 0; } =20 +static int apply_r_riscv_pcrel_32_rela(struct module *me, u32 *location, + Elf_Addr v) +{ + ptrdiff_t offset =3D (void *)v - (void *)location; + + *location =3D (*location & 0xffff0000) | (offset & 0xffff); + return 0; +} + static int (*reloc_handlers_rela[]) (struct module *me, u32 *location, Elf_Addr v) =3D { [R_RISCV_32] =3D apply_r_riscv_32_rela, @@ -335,6 +344,7 @@ static int (*reloc_handlers_rela[]) (struct module *me,= u32 *location, [R_RISCV_SUB16] =3D apply_r_riscv_sub16_rela, [R_RISCV_SUB32] =3D apply_r_riscv_sub32_rela, [R_RISCV_SUB64] =3D apply_r_riscv_sub64_rela, + [R_RISCV_32_PCREL] =3D apply_r_riscv_pcrel_32_rela, }; =20 int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab, --=20 2.40.1