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Only align when flags Fixed is not present (#2945)

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Should fix some remaining memory issues.
This commit is contained in:
Stephen Miller 2025-05-16 16:21:13 -05:00 • committed by GitHub
parent ffd31589cf
commit a0acb47185
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GPG key ID: B5690EEEBB952194
1 changed files with 5 additions and 6 deletions
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11
src/core/memory.cpp
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@ -362,11 +362,8 @@ int MemoryManager::MapMemory(void** out_addr, VAddr virtual_addr, size_t size, M
return ORBIS_KERNEL_ERROR_ENOMEM;
}
// When virtual addr is zero, force it to virtual_base. The guest cannot pass Fixed
// flag so we will take the branch that searches for free (or reserved) mappings.
virtual_addr = (virtual_addr == 0) ? impl.SystemManagedVirtualBase() : virtual_addr;
alignment = alignment > 0 ? alignment : 16_KB;
VAddr mapped_addr = alignment > 0 ? Common::AlignUp(virtual_addr, alignment) : virtual_addr;
// Limit the minumum address to SystemManagedVirtualBase to prevent hardware-specific issues.
VAddr mapped_addr = (virtual_addr == 0) ? impl.SystemManagedVirtualBase() : virtual_addr;
// Fixed mapping means the virtual address must exactly match the provided one.
if (True(flags & MemoryMapFlags::Fixed)) {
@ -396,7 +393,9 @@ int MemoryManager::MapMemory(void** out_addr, VAddr virtual_addr, size_t size, M
// Find the first free area starting with provided virtual address.
if (False(flags & MemoryMapFlags::Fixed)) {
mapped_addr = SearchFree(mapped_addr, size, alignment);
// Provided address needs to be aligned before we can map.
alignment = alignment > 0 ? alignment : 16_KB;
mapped_addr = SearchFree(Common::AlignUp(mapped_addr, alignment), size, alignment);
if (mapped_addr == -1) {
// No suitable memory areas to map to
return ORBIS_KERNEL_ERROR_ENOMEM;