lkml.org 
[lkml]   [2018]   [Mar]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH 00/11] RISC-V: Resolve the issue of loadable module on 64-bit
Date
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

\
 
 \ /
  Last update: 2018-03-13 09:48    [W:0.112 / U:0.196 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site