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kern: implement new attr tracking for memory range/traversal context

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This commit is contained in:
Michael Scire
2024-03-28 02:30:24 -07:00
parent cfb12deb51
commit af7a200865
5 changed files with 26 additions and 7 deletions
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6
libraries/libmesosphere/source/arch/arm64/kern_k_page_table.cpp
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@@ -258,7 +258,7 @@ namespace ams::kern::arch::arm64 {
/* Begin the traversal. */
TraversalContext context;
TraversalEntry cur_entry = { .phys_addr = Null<KPhysicalAddress>, .block_size = 0, .sw_reserved_bits = 0 };
TraversalEntry cur_entry = { .phys_addr = Null<KPhysicalAddress>, .block_size = 0, .sw_reserved_bits = 0, .attr = 0 };
bool cur_valid = false;
TraversalEntry next_entry;
bool next_valid;
@@ -268,7 +268,9 @@ namespace ams::kern::arch::arm64 {
/* Iterate over entries. */
while (true) {
if ((!next_valid && !cur_valid) || (next_valid && cur_valid && next_entry.phys_addr == cur_entry.phys_addr + cur_entry.block_size)) {
/* NOTE: Nintendo really does check next_entry.attr == (cur_entry.attr != 0)...but attr is always zero as of 18.0.0, and this is "probably" for the new console or debug-only anyway, */
/* so we'll implement the weird logic verbatim even though it doesn't match the GetContiguousRange logic. */
if ((!next_valid && !cur_valid) || (next_valid && cur_valid && next_entry.phys_addr == cur_entry.phys_addr + cur_entry.block_size && next_entry.attr == (cur_entry.attr ? 1 : 0))) {
cur_entry.block_size += next_entry.block_size;
} else {
if (cur_valid && IsHeapPhysicalAddressForFinalize(cur_entry.phys_addr)) {