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kern: implement additional randomness in KPageHeap allocations

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Michael Scire 2022-03-22 15:29:55 -07:00 • committed by SciresM
parent 24739f245e
commit 401047f603
6 changed files with 150 additions and 18 deletions
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4
libraries/libmesosphere/source/kern_k_page_table_base.cpp
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@ -3608,13 +3608,13 @@ namespace ams::kern {
/* Allocate the start page as needed. */
if (aligned_src_start < mapping_src_start) {
start_partial_page = Kernel::GetMemoryManager().AllocateAndOpenContinuous(1, 0, m_allocate_option);
start_partial_page = Kernel::GetMemoryManager().AllocateAndOpenContinuous(1, 1, m_allocate_option);
R_UNLESS(start_partial_page != Null<KPhysicalAddress>, svc::ResultOutOfMemory());
}
/* Allocate the end page as needed. */
if (mapping_src_end < aligned_src_end && (aligned_src_start < mapping_src_end || aligned_src_start == mapping_src_start)) {
end_partial_page = Kernel::GetMemoryManager().AllocateAndOpenContinuous(1, 0, m_allocate_option);
end_partial_page = Kernel::GetMemoryManager().AllocateAndOpenContinuous(1, 1, m_allocate_option);
R_UNLESS(end_partial_page != Null<KPhysicalAddress>, svc::ResultOutOfMemory());
}