From: Torsten Duwe <duwe@lst.de>
To: Li Zhengyu <lizhengyu3@huawei.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Conor Dooley <conor.dooley@microchip.com>,
Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>,
Li Huafei <lihuafei1@huawei.com>,
Liao Chang <liaochang1@huawei.com>,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH] riscv: relocate R_RISCV_CALL_PLT in kexec_file
Date: Fri, 10 Mar 2023 19:27:26 +0100 [thread overview]
Message-ID: <20230310182726.GA25154@lst.de> (raw)
Depending on the toolchain (here: gcc-12, binutils-2.40) the
relocation entries for function calls are no longer R_RISCV_CALL, but
R_RISCV_CALL_PLT. When trying kexec_load_file on such kernels, it will
fail with
kexec_image: Unknown rela relocation: 19
kexec_image: Error loading purgatory ret=-8
The binary code at the call site remains the same, so tell
arch_kexec_apply_relocations_add() to handle _PLT alike.
fixes: 838b3e28488f702 ("Load purgatory in kexec_file")
Signed-off-by: Torsten Duwe <duwe@suse.de>
Cc: stable@vger.kernel.org
---
--- a/arch/riscv/kernel/elf_kexec.c
+++ b/arch/riscv/kernel/elf_kexec.c
@@ -425,6 +425,7 @@ int arch_kexec_apply_relocations_add(struct purgatory_info *pi,
* sym, instead of searching the whole relsec.
*/
case R_RISCV_PCREL_HI20:
+ case R_RISCV_CALL_PLT:
case R_RISCV_CALL:
*(u64 *)loc = CLEAN_IMM(UITYPE, *(u64 *)loc) |
ENCODE_UJTYPE_IMM(val - addr);
next reply other threads:[~2023-03-10 18:27 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-10 18:27 Torsten Duwe [this message]
2023-03-13 3:13 ` [PATCH] riscv: relocate R_RISCV_CALL_PLT in kexec_file Li Zhengyu
2023-03-21 15:03 ` Torsten Duwe
2023-03-21 15:35 ` Conor Dooley
2023-07-23 10:27 ` Conor Dooley
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