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protos/limine: Limit KASLR wiggle room to a quarter instead of half of the higher half

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mintsuki 2024-07-27 08:32:02 +02:00
parent cf30cb1b39
commit 11d345ebb0
1 changed files with 2 additions and 2 deletions
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4
common/protos/limine.c
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@ -235,8 +235,8 @@ static void **requests;
static void set_paging_mode(int paging_mode, bool kaslr) {
direct_map_offset = paging_mode_higher_half(paging_mode);
if (kaslr) {
// Half of the higher half of wiggle room for KASLR, align to 1GiB steps.
uint64_t mask = ((uint64_t)1 << (paging_mode_va_bits(paging_mode) - 2)) - 1;
// A quarter of the higher half of wiggle room for KASLR, align to 1GiB steps.
uint64_t mask = ((uint64_t)1 << (paging_mode_va_bits(paging_mode) - 3)) - 1;
direct_map_offset += (rand64() & ~((uint64_t)0x40000000 - 1)) & mask;
}
}