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Dynamically detect 39-bit address space

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This commit is contained in:
yellowsparkles584 2026-04-26 08:26:52 +00:00
parent a762f70df3
commit e64ec7d2f4
1 changed files with 12 additions and 1 deletions
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13
src/core/address_space.cpp
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@ -124,7 +124,8 @@ struct AddressSpace::Impl {
RTL_OSVERSIONINFOW os_version_info{};
RtlGetVersion(&os_version_info);
u64 supported_user_max = USER_MAX;
const VAddr va_size = reinterpret_cast<VAddr>(sys_info.lpMaximumApplicationAddress);
u64 supported_user_max = va_size;
// This is the build number for Windows 11 22H2
static constexpr s32 AffectedBuildNumber = 22621;
@ -144,7 +145,17 @@ struct AddressSpace::Impl {
}
// Determine the free address ranges we can access.
const bool is_39bit = va_size <= 0x7FFFFFFFFFULL;
VAddr next_addr = SYSTEM_MANAGED_MIN;
if (is_39bit) {
supported_user_max = 0x7000000000ULL;
LOG_WARNING(
Core, "39-bit address space detected, reducing user max to {:#x} to avoid problems",
supported_user_max);
next_addr = 0x80000000ULL;
}
MEMORY_BASIC_INFORMATION info{};
while (next_addr <= supported_user_max) {
ASSERT_MSG(VirtualQuery(reinterpret_cast<PVOID>(next_addr), &info, sizeof(info)),