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SPU/Linux: Ensure aligned 64k allocations in utils::memory_reserve

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This commit is contained in:
Eladash 2020-07-18 13:37:17 +03:00 committed by Ivan
parent c37bc3c55c
commit 0d8152cd4e
1 changed files with 25 additions and 0 deletions
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25
Utilities/VirtualMemory.cpp
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@ -63,6 +63,17 @@ namespace utils
#ifdef _WIN32
return ::VirtualAlloc(use_addr, size, MEM_RESERVE, PAGE_NOACCESS);
#else
if (use_addr && reinterpret_cast<uptr>(use_addr) % 0x10000)
{
return nullptr;
}
if (!use_addr)
{
// Hack: Ensure aligned 64k allocations
size += 0x10000;
}
auto ptr = ::mmap(use_addr, size, PROT_NONE, MAP_ANON | MAP_PRIVATE, -1, 0);
if (ptr == reinterpret_cast<void*>(-1))
@ -76,6 +87,20 @@ namespace utils
return nullptr;
}
if (!use_addr && ptr)
{
// Continuation of the hack above
const auto misalign = reinterpret_cast<uptr>(ptr) % 0x10000;
::munmap(ptr, 0x10000 - misalign);
if (misalign)
{
::munmap(static_cast<u8*>(ptr) + size - misalign, misalign);
}
ptr = static_cast<u8*>(ptr) + (0x10000 - misalign);
}
return ptr;
#endif
}