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Increase Code Region Size to 4GiB

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The code region's size was previously set at the same value as it is for 36-bit ASes, this value is inadequate for certain larger games and needed to be expanded. We've chosen 4GiB as the new value which should easily encompass all Switch games.
This commit is contained in:
PixelyIon 2021-03-02 15:27:55 +05:30 committed by ◱ Mark
parent 11c5f50d37
commit 0233916489
1 changed files with 4 additions and 3 deletions
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7
app/src/main/cpp/skyline/kernel/memory.cpp
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@ -13,6 +13,7 @@ namespace skyline::kernel {
}
constexpr size_t RegionAlignment{1ULL << 21}; //!< The minimum alignment of a HOS memory region
constexpr size_t CodeRegionSize{4ULL * 1024 * 1024 * 1024}; //!< The assumed maximum size of the code region (4GiB)
void MemoryManager::InitializeVmm(memory::AddressSpaceType type) {
switch (type) {
@ -30,7 +31,7 @@ namespace skyline::kernel {
case memory::AddressSpaceType::AddressSpace39Bit: {
addressSpace.address = 0;
addressSpace.size = 1UL << 39;
base.size = 0x78000000 + 0x1000000000 + 0x180000000 + 0x80000000 + 0x1000000000; // Code region size is an assumed maximum here
base.size = CodeRegionSize + 0x1000000000 + 0x180000000 + 0x80000000 + 0x1000000000;
break;
}
@ -53,7 +54,7 @@ namespace skyline::kernel {
start = util::HexStringToInt<u64>(std::string_view(maps.data() + maps.find_first_of('-', line) + 1, sizeof(u64) * 2));
alignedStart = util::AlignUp(start, RegionAlignment);
if (alignedStart + base.size > addressSpace.size)
if (alignedStart + base.size > addressSpace.size) // We don't want to map past the end of the address space
break;
} while ((line = maps.find_first_of('\n', line)) != std::string::npos && line++);
@ -121,7 +122,7 @@ namespace skyline::kernel {
auto newSize{code.size + alias.size + stack.size + heap.size + ((addressSpace.size == 1UL << 39) ? tlsIo.size : 0)};
if (newSize > base.size)
throw exception("Region size has exceeded pre-allocated area: 0x{:X}/0x{:X}", newSize, base.size);
throw exception("Guest VMM size has exceeded host carveout size: 0x{:X}/0x{:X} (Code: 0x{:X}/0x{:X})", newSize, base.size, code.size, CodeRegionSize);
if (newSize != base.size)
munmap(reinterpret_cast<u8 *>(base.address) + base.size, newSize - base.size);