lkml.org 
[lkml]   [2023]   [Jan]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH 0/4] LoongArch: Add kernel relocation and KASLR support
Date
This patch series to support kernel relocation and KASLR (only 64bit).

Both old[1] and new[2] toolchains support this feature, and the test results
are as follows:
1) Enable CONFING_RELOCATABLE
# cat /proc/iomem
00000000-0fffffff : System RAM
00000000-002c3fff : Reserved
002c4000-008c3fff : Reserved
02000000-02f4ffff : Kernel code
02f50000-0381cbff : Kernel data
0381cc00-0394ae37 : Kernel bss

2) Enable CONFING_RANDOMIZE_BASE (KASLR)
first:
# cat /proc/iomem
00000000-0fffffff : System RAM
00000000-002c3fff : Reserved
002c4000-008c3fff : Reserved
02550000-0349ffff : Kernel code
034a0000-03d6cbff : Kernel data
03d6cc00-03e9ae37 : Kernel bss

second:
# cat /proc/iomem
00000000-0fffffff : System RAM
00000000-002c3fff : Reserved
002c4000-008c3fff : Reserved
02ad0000-03a1ffff : Kernel code
03a20000-042ecbff : Kernel data
042ecc00-0441ae37 : Kernel bss

Thanks to @Ruoyao's and @Jinyang's for their help and suggestions.

Links:
[1]: https://github.com/sunhaiyong1978/CLFS-for-LoongArch/releases/download/5.0/loongarch64-clfs-5.1-cross-tools-c-only.tar.xz
[2]: https://github.com/sunhaiyong1978/CLFS-for-LoongArch/releases/download/6.0/loongarch64-clfs-6.3-cross-tools-c-only.tar.xz

Xi Ruoyao (1):
LoongArch: Use trampoline for exception handlers and kill la.abs

Youling Tang (3):
LoongArch: Add JUMP_LINK_ADDR macro implementation to avoid using
la.abs
LoongArch: Add support for kernel relocation
LoongArch: Add support for kernel address space layout randomization
(KASLR)

arch/loongarch/Kconfig | 37 +++++
arch/loongarch/Makefile | 5 +
arch/loongarch/include/asm/page.h | 6 +
arch/loongarch/include/asm/stackframe.h | 16 +-
arch/loongarch/include/asm/uaccess.h | 1 -
arch/loongarch/kernel/Makefile | 2 +
arch/loongarch/kernel/entry.S | 6 +-
arch/loongarch/kernel/genex.S | 20 +--
arch/loongarch/kernel/head.S | 30 +++-
arch/loongarch/kernel/relocate.c | 210 ++++++++++++++++++++++++
arch/loongarch/kernel/setup.c | 3 +
arch/loongarch/kernel/traps.c | 4 +-
arch/loongarch/kernel/vmlinux.lds.S | 11 +-
arch/loongarch/mm/tlbex.S | 28 +---
arch/loongarch/power/suspend_asm.S | 5 +-
15 files changed, 333 insertions(+), 51 deletions(-)
create mode 100644 arch/loongarch/kernel/relocate.c

--
2.37.1

\
 
 \ /
  Last update: 2023-03-26 23:32    [W:0.213 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site