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authorYouling Tang <tangyouling@loongson.cn>2023-02-25 08:52:56 +0100
committerHuacai Chen <chenhuacai@loongson.cn>2023-02-25 15:12:17 +0100
commite5f02b51fa0cb785e352e77271a65e96051b789b (patch)
tree843d66d45eec2f69de38952774c747ed29adf065 /fs/reiserfs/hashes.c
parentLoongArch: Add support for kernel relocation (diff)
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LoongArch: Add support for kernel address space layout randomization (KASLR)
This patch adds support for relocating the kernel to a random address. Entropy is derived from the banner, which will change every build and random_get_entropy() which should provide additional runtime entropy. The kernel is relocated by up to RANDOMIZE_BASE_MAX_OFFSET bytes from its link address. Because relocation happens so early during the kernel booting, the amount of physical memory has not yet been determined. This means the only way to limit relocation within the available memory is via Kconfig. So we limit the maximum value of RANDOMIZE_BASE_MAX_OFFSET to 256M (0x10000000) because our memory layout has many holes. Signed-off-by: Youling Tang <tangyouling@loongson.cn> Signed-off-by: Xi Ruoyao <xry111@xry111.site> # Fix compiler warnings Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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