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Make sure only system managed region can be moved on Windows.

This commit is contained in:
squidbus 2024-07-16 18:15:35 -07:00 committed by TheTurtle
parent 26e0fc6ad5
commit b557de2c62
1 changed files with 7 additions and 9 deletions
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16
src/core/address_space.cpp
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@ -60,6 +60,7 @@ struct AddressSpace::Impl {
size_t reduction = 0;
for (u32 i = 0; i < MaxReductions; i++) {
req.LowestStartingAddress = reinterpret_cast<PVOID>(SYSTEM_MANAGED_MIN + reduction);
virtual_base = static_cast<u8*>(VirtualAlloc2(
process, NULL, SystemManagedSize + SystemReservedSize + UserSize - reduction,
MEM_RESERVE | MEM_RESERVE_PLACEHOLDER, PAGE_NOACCESS, &param, 1));
@ -70,17 +71,14 @@ struct AddressSpace::Impl {
}
ASSERT_MSG(virtual_base, "Unable to reserve virtual address space!");
// Take the reduction off of the system managed area, and leave the others unchanged.
system_managed_base = virtual_base;
system_managed_size = SystemManagedSize - reduction;
system_reserved_base =
virtual_base + (SYSTEM_RESERVED_MIN - SYSTEM_MANAGED_MIN) - reduction;
system_reserved_base = reinterpret_cast<u8*>(SYSTEM_RESERVED_MIN);
system_reserved_size = SystemReservedSize;
user_base = virtual_base + (USER_MIN - SYSTEM_MANAGED_MIN) - reduction;
user_base = reinterpret_cast<u8*>(USER_MIN);
user_size = UserSize;
ASSERT_MSG(user_base == reinterpret_cast<u8*>(USER_MIN),
"Unexpected user address space location: {}", fmt::ptr(user_base));
LOG_INFO(Kernel_Vmm, "System managed virtual memory region: {} - {}",
fmt::ptr(system_managed_base),
fmt::ptr(system_managed_base + system_managed_size - 1));
@ -292,10 +290,10 @@ struct AddressSpace::Impl {
system_managed_base = reinterpret_cast<u8*>(
mmap(reinterpret_cast<void*>(SYSTEM_MANAGED_MIN), system_managed_size, protection_flags,
base_map_flags | MAP_FIXED, -1, 0));
// Cannot guarantee enough space for these areas at the desired addresses, so not MAP_FIXED.
system_reserved_base = reinterpret_cast<u8*>(
mmap(reinterpret_cast<void*>(SYSTEM_RESERVED_MIN), system_reserved_size,
protection_flags, base_map_flags | MAP_FIXED, -1, 0));
// Cannot guarantee enough space for these areas at the desired addresses, so not MAP_FIXED.
user_base = reinterpret_cast<u8*>(mmap(reinterpret_cast<void*>(USER_MIN), user_size,
protection_flags, base_map_flags, -1, 0));
#else
@ -304,8 +302,8 @@ struct AddressSpace::Impl {
reinterpret_cast<u8*>(mmap(reinterpret_cast<void*>(SYSTEM_MANAGED_MIN), virtual_size,
protection_flags, base_map_flags | MAP_FIXED, -1, 0));
system_managed_base = virtual_base;
system_managed_base = virtual_base + (SYSTEM_RESERVED_MIN - SYSTEM_MANAGED_MIN);
user_base = virtual_base + (USER_MIN - SYSTEM_MANAGED_MIN);
system_reserved_base = reinterpret_cast<u8*>(SYSTEM_RESERVED_MIN);
user_base = reinterpret_cast<u8*>(USER_MIN);
#endif
if (system_managed_base == MAP_FAILED || system_reserved_base == MAP_FAILED ||
user_base == MAP_FAILED) {