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| author | Jinyang He | 2020-11-25 18:07:46 +0800 |
|---|---|---|
| committer | Thomas Bogendoerfer | 2020-11-27 10:20:25 +0100 |
| commit | a307a4ce9ecd2e23c71318201330d9d648b3f818 (patch) | |
| tree | e2b26a56a7076629a7e05e6ecb560466641b8dec /arch/mips/mm/fault.c | |
| parent | 74a2810b7c1fcd60c87a8c47f95660628e00e97c (diff) | |
MIPS: Loongson64: Add KASLR support
Provide a weak plat_get_fdt() in relocate.c in case some platform enable
USE_OF while plat_get_fdt() is useless.
1MB RELOCATION_TABLE_SIZE is small for Loongson64 because too many
instructions should be relocated. 2MB is enough in present.
Add KASLR support for Loongson64.
KASLR(kernel address space layout randomization)
To enable KASLR on Loongson64:
First, make loongson3_defconfig.
Then, enable CONFIG_RELOCATABLE and CONFIG_RANDOMIZE_BASE.
Finally, compile the kernel.
To test KASLR on Loongson64:
Start machine with KASLR kernel.
The first time:
# cat /proc/iomem
00200000-0effffff : System RAM
02f30000-03895e9f : Kernel code
03895ea0-03bc7fff : Kernel data
03e30000-04f43f7f : Kernel bss
The second time:
# cat /proc/iomem
00200000-0effffff : System RAM
022f0000-02c55e9f : Kernel code
02c55ea0-02f87fff : Kernel data
031f0000-04303f7f : Kernel bss
We see that code, data and bss sections become randomize.
Signed-off-by: Jinyang He <hejinyang@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'arch/mips/mm/fault.c')
0 files changed, 0 insertions, 0 deletions