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kern/kldr: fix bugs in physical randomization

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This commit is contained in:
Michael Scire 2020-04-22 03:45:21 -07:00
parent 4f50f57bb7
commit 6ad0f0e7f2
2 changed files with 5 additions and 4 deletions
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8
libraries/libmesosphere/include/mesosphere/arch/arm64/init/kern_k_init_page_table.hpp
View file

@ -221,14 +221,14 @@ namespace ams::kern::arch::arm64::init {
PageTableEntry *src_entry = this->GetMappingEntry(src_virt_addr, block_size);
const auto src_saved = *src_entry;
for (size_t i = 0; i < num_mappings; i++) {
*src_entry = InvalidPageTableEntry;
src_entry[i] = InvalidPageTableEntry;
}
/* Unmap the target. */
PageTableEntry *dst_entry = this->GetMappingEntry(dst_virt_addr, block_size);
const auto dst_saved = *dst_entry;
for (size_t i = 0; i < num_mappings; i++) {
*dst_entry = InvalidPageTableEntry;
dst_entry[i] = InvalidPageTableEntry;
}
/* Invalidate the entire tlb. */
@ -237,7 +237,7 @@ namespace ams::kern::arch::arm64::init {
/* Copy data, if we should. */
const u64 negative_block_size_for_mask = static_cast<u64>(-static_cast<s64>(block_size));
const u64 offset_mask = negative_block_size_for_mask & ((1ul << 36) - 1);
const u64 offset_mask = negative_block_size_for_mask & ((1ul << 48) - 1);
const KVirtualAddress copy_src_addr = KVirtualAddress(src_saved.GetRawAttributesUnsafeForSwap() & offset_mask);
const KVirtualAddress copy_dst_addr = KVirtualAddress(dst_saved.GetRawAttributesUnsafeForSwap() & offset_mask);
if (block_size && do_copy) {
@ -250,7 +250,7 @@ namespace ams::kern::arch::arm64::init {
}
/* Swap the mappings. */
const u64 attr_preserve_mask = (negative_block_size_for_mask | 0xFFFF000000000000ul) ^ ((1ul << 36) - 1);
const u64 attr_preserve_mask = (negative_block_size_for_mask | 0xFFFF000000000000ul) ^ ((1ul << 48) - 1);
const size_t shift_for_contig = contig ? 4 : 0;
size_t advanced_size = 0;
const u64 src_attr_val = src_saved.GetRawAttributesUnsafeForSwap() & attr_preserve_mask;

1
mesosphere/kernel_ldr/source/kern_init_loader.cpp
View file

@ -307,6 +307,7 @@ namespace ams::kern::init::loader {
/* On 10.0.0+, Physically randomize the kernel region. */
if (kern::GetTargetFirmware() >= kern::TargetFirmware_10_0_0) {
ttbr1_table.PhysicallyRandomize(virtual_base_address + rx_offset, bss_end_offset - rx_offset, true);
cpu::StoreEntireCacheForInit();
}
/* Clear kernel .bss. */