Messages in this thread | | | From | Zong Li <> | Subject | [PATCH 00/11] RISC-V: Resolve the issue of loadable module on 64-bit | Date | Tue, 13 Mar 2018 16:35:05 +0800 |
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These patches resolve the some issues of loadable module. - symbol out of ranges - unknown relocation types
The reference of external variable and function symbols cannot exceed 32-bit offset ranges in kernel module. The module only can work on the 32-bit OS or the 64-bit OS with sv32 virtual addressing.
These patches will generate the .got, .got.plt and .plt sections during loading module, let it can refer to the symbol which locate more than 32-bit offset. These sections depend on the relocation types: - R_RISCV_GOT_HI20 - R_RISCV_CALL_PLT
These patches also support more relocation types - R_RISCV_CALL - R_RISCV_HI20 - R_RISCV_LO12_I - R_RISCV_LO12_S - R_RISCV_RVC_BRANCH - R_RISCV_RVC_JUMP - R_RISCV_ALIGN - R_RISCV_ADD32 - R_RISCV_SUB32
Zong Li (11): RISC-V: Add sections of PLT and GOT for kernel module RISC-V: Add section of GOT.PLT for kernel module RISC-V: Support GOT_HI20/CALL_PLT relocation type in kernel module RISC-V: Support CALL relocation type in kernel module RISC-V: Support HI20/LO12_I/LO12_S relocation type in kernel module RISC-V: Support RVC_BRANCH/JUMP relocation type in kernel modulewq RISC-V: Support ALIGN relocation type in kernel module RISC-V: Support ADD32 relocation type in kernel module RISC-V: Support SUB32 relocation type in kernel module RISC-V: Enable module support in defconfig RISC-V: Add definition of relocation types
arch/riscv/Kconfig | 5 ++ arch/riscv/Makefile | 3 + arch/riscv/configs/defconfig | 2 + arch/riscv/include/asm/module.h | 112 +++++++++++++++++++++++ arch/riscv/include/uapi/asm/elf.h | 24 +++++ arch/riscv/kernel/Makefile | 1 + arch/riscv/kernel/module-sections.c | 156 ++++++++++++++++++++++++++++++++ arch/riscv/kernel/module.c | 175 ++++++++++++++++++++++++++++++++++-- arch/riscv/kernel/module.lds | 8 ++ 9 files changed, 480 insertions(+), 6 deletions(-) create mode 100644 arch/riscv/include/asm/module.h create mode 100644 arch/riscv/kernel/module-sections.c create mode 100644 arch/riscv/kernel/module.lds
-- 2.16.1
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