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xenia-canary/src/xenia/kernel/xboxkrnl/xboxkrnl_memory.cc

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/**
******************************************************************************
* Xenia : Xbox 360 Emulator Research Project *
******************************************************************************
* Copyright 2013 Ben Vanik. All rights reserved. *
* Released under the BSD license - see LICENSE in the root for more details. *
******************************************************************************
*/
#include <cstring>
#include "xenia/base/assert.h"
#include "xenia/base/logging.h"
#include "xenia/base/math.h"
#include "xenia/kernel/kernel_state.h"
#include "xenia/kernel/util/shim_utils.h"
#include "xenia/kernel/xboxkrnl/xboxkrnl_private.h"
#include "xenia/xbox.h"
namespace xe {
namespace kernel {
namespace xboxkrnl {
uint32_t ToXdkProtectFlags(uint32_t protect) {
uint32_t result = 0;
if (!(protect & kMemoryProtectRead) && !(protect & kMemoryProtectWrite)) {
result = X_PAGE_NOACCESS;
} else if ((protect & kMemoryProtectRead) &&
!(protect & kMemoryProtectWrite)) {
result = X_PAGE_READONLY;
} else {
result = X_PAGE_READWRITE;
}
if (protect & kMemoryProtectNoCache) {
result |= X_PAGE_NOCACHE;
}
if (protect & kMemoryProtectWriteCombine) {
result |= X_PAGE_WRITECOMBINE;
}
return result;
}
uint32_t FromXdkProtectFlags(uint32_t protect) {
uint32_t result = 0;
if ((protect & X_PAGE_READONLY) | (protect & X_PAGE_EXECUTE_READ)) {
result = kMemoryProtectRead;
} else if ((protect & X_PAGE_READWRITE) |
(protect & X_PAGE_EXECUTE_READWRITE)) {
result = kMemoryProtectRead | kMemoryProtectWrite;
}
if (protect & X_PAGE_NOCACHE) {
result |= kMemoryProtectNoCache;
}
if (protect & X_PAGE_WRITECOMBINE) {
result |= kMemoryProtectWriteCombine;
}
return result;
}
dword_result_t NtAllocateVirtualMemory(lpdword_t base_addr_ptr,
lpdword_t region_size_ptr,
dword_t alloc_type, dword_t protect_bits,
dword_t debug_memory) {
// NTSTATUS
// _Inout_ PVOID *BaseAddress,
// _Inout_ PSIZE_T RegionSize,
// _In_ ULONG AllocationType,
// _In_ ULONG Protect
// _In_ BOOLEAN DebugMemory
assert_not_null(base_addr_ptr);
assert_not_null(region_size_ptr);
// Set to TRUE when allocation is from devkit memory area.
assert_true(debug_memory == 0);
// This allocates memory from the kernel heap, which is initialized on startup
// and shared by both the kernel implementation and user code.
// The xe_memory_ref object is used to actually get the memory, and although
// it's simple today we could extend it to do better things in the future.
// Must request a size.
if (!base_addr_ptr || !region_size_ptr) {
return X_STATUS_INVALID_PARAMETER;
}
// Check allocation type.
if (!(alloc_type & (X_MEM_COMMIT | X_MEM_RESET | X_MEM_RESERVE))) {
return X_STATUS_INVALID_PARAMETER;
}
// If MEM_RESET is set only MEM_RESET can be set.
if (alloc_type & X_MEM_RESET && (alloc_type & ~X_MEM_RESET)) {
return X_STATUS_INVALID_PARAMETER;
}
// Don't allow games to set execute bits.
if (protect_bits & (X_PAGE_EXECUTE | X_PAGE_EXECUTE_READ |
X_PAGE_EXECUTE_READWRITE | X_PAGE_EXECUTE_WRITECOPY)) {
XELOGW("Game setting EXECUTE bit on allocation");
}
// Tried to allocate virtual over xex or physical range
if (*base_addr_ptr >= 0x80000000) {
XELOGE(
"NtAllocateVirtualMemory tried to allocate memory over xex or physical "
"range");
return X_STATUS_INVALID_PARAMETER;
}
uint32_t page_size;
if (*base_addr_ptr != 0) {
// ignore specified page size when base address is specified.
auto heap = kernel_memory()->LookupHeap(*base_addr_ptr);
page_size = heap->page_size();
} else {
// Adjust size.
page_size = 4 * 1024;
if (alloc_type & X_MEM_LARGE_PAGES) {
page_size = 64 * 1024;
}
}
// Round the base address down to the nearest page boundary.
uint32_t adjusted_base = *base_addr_ptr - (*base_addr_ptr % page_size);
// For some reason, some games pass in negative sizes.
uint32_t adjusted_size = int32_t(*region_size_ptr) < 0
? -int32_t(region_size_ptr.value())
: region_size_ptr.value();
adjusted_size = xe::round_up(adjusted_size, page_size);
// Allocate.
uint32_t allocation_type = 0;
if (alloc_type & X_MEM_RESERVE) {
allocation_type |= kMemoryAllocationReserve;
}
if (alloc_type & X_MEM_COMMIT) {
allocation_type |= kMemoryAllocationCommit;
}
if (alloc_type & X_MEM_RESET) {
XELOGE("X_MEM_RESET not implemented");
assert_always();
}
uint32_t protect = FromXdkProtectFlags(protect_bits);
uint32_t address = 0;
if (adjusted_base != 0) {
auto heap = kernel_memory()->LookupHeap(adjusted_base);
if (heap->page_size() != page_size) {
// Specified the wrong page size for the wrong heap.
return X_STATUS_ACCESS_DENIED;
}
if (heap->AllocFixed(adjusted_base, adjusted_size, page_size,
allocation_type, protect)) {
address = adjusted_base;
}
} else {
bool top_down = !!(alloc_type & X_MEM_TOP_DOWN);
auto heap = kernel_memory()->LookupHeapByType(false, page_size);
heap->Alloc(adjusted_size, page_size, allocation_type, protect, top_down,
&address);
}
if (!address) {
// Failed - assume no memory available.
return X_STATUS_NO_MEMORY;
}
// Zero memory, if needed.
if (address && !(alloc_type & X_MEM_NOZERO)) {
if (alloc_type & X_MEM_COMMIT) {
kernel_memory()->Zero(address, adjusted_size);
}
}
XELOGD("NtAllocateVirtualMemory = {:08X}", address);
// Stash back.
// Maybe set X_STATUS_ALREADY_COMMITTED if MEM_COMMIT?
*base_addr_ptr = address;
*region_size_ptr = adjusted_size;
return X_STATUS_SUCCESS;
}
DECLARE_XBOXKRNL_EXPORT1(NtAllocateVirtualMemory, kMemory, kImplemented);
dword_result_t NtProtectVirtualMemory(lpdword_t base_addr_ptr,
lpdword_t region_size_ptr,
dword_t protect_bits,
lpdword_t old_protect,
dword_t debug_memory) {
// Set to TRUE when this memory refers to devkit memory area.
assert_true(debug_memory == 0);
// Must request a size.
if (!base_addr_ptr || !region_size_ptr) {
return X_STATUS_INVALID_PARAMETER;
}
// Don't allow games to set execute bits.
if (protect_bits & (X_PAGE_EXECUTE | X_PAGE_EXECUTE_READ |
X_PAGE_EXECUTE_READWRITE | X_PAGE_EXECUTE_WRITECOPY)) {
XELOGW("Game setting EXECUTE bit on protect");
return X_STATUS_ACCESS_DENIED;
}
auto heap = kernel_memory()->LookupHeap(*base_addr_ptr);
// Adjust the base downwards to the nearest page boundary.
uint32_t adjusted_base =
*base_addr_ptr - (*base_addr_ptr % heap->page_size());
uint32_t adjusted_size = xe::round_up(*region_size_ptr, heap->page_size());
uint32_t protect = FromXdkProtectFlags(protect_bits);
uint32_t tmp_old_protect = 0;
// FIXME: I think it's valid for NtProtectVirtualMemory to span regions, but
// as of now our implementation will fail in this case. Need to verify.
if (!heap->Protect(adjusted_base, adjusted_size, protect, &tmp_old_protect)) {
return X_STATUS_ACCESS_DENIED;
}
// Write back output variables.
*base_addr_ptr = adjusted_base;
*region_size_ptr = adjusted_size;
if (old_protect) {
*old_protect = tmp_old_protect;
}
return X_STATUS_SUCCESS;
}
DECLARE_XBOXKRNL_EXPORT1(NtProtectVirtualMemory, kMemory, kImplemented);
dword_result_t NtFreeVirtualMemory(lpdword_t base_addr_ptr,
lpdword_t region_size_ptr, dword_t free_type,
dword_t debug_memory) {
uint32_t base_addr_value = *base_addr_ptr;
uint32_t region_size_value = *region_size_ptr;
// X_MEM_DECOMMIT | X_MEM_RELEASE
// NTSTATUS
// _Inout_ PVOID *BaseAddress,
// _Inout_ PSIZE_T RegionSize,
// _In_ ULONG FreeType
// _In_ BOOLEAN DebugMemory
// Set to TRUE when freeing external devkit memory.
assert_true(debug_memory == 0);
if (!base_addr_value) {
return X_STATUS_MEMORY_NOT_ALLOCATED;
}
auto heap = kernel_state()->memory()->LookupHeap(base_addr_value);
bool result = false;
if (free_type == X_MEM_DECOMMIT) {
// If zero, we may need to query size (free whole region).
assert_not_zero(region_size_value);
region_size_value = xe::round_up(region_size_value, heap->page_size());
result = heap->Decommit(base_addr_value, region_size_value);
} else {
result = heap->Release(base_addr_value, &region_size_value);
}
if (!result) {
return X_STATUS_UNSUCCESSFUL;
}
*base_addr_ptr = base_addr_value;
*region_size_ptr = region_size_value;
return X_STATUS_SUCCESS;
}
DECLARE_XBOXKRNL_EXPORT1(NtFreeVirtualMemory, kMemory, kImplemented);
struct X_MEMORY_BASIC_INFORMATION {
be<uint32_t> base_address;
be<uint32_t> allocation_base;
be<uint32_t> allocation_protect;
be<uint32_t> region_size;
be<uint32_t> state;
be<uint32_t> protect;
be<uint32_t> type;
};
dword_result_t NtQueryVirtualMemory(
dword_t base_address,
pointer_t<X_MEMORY_BASIC_INFORMATION> memory_basic_information_ptr) {
auto heap = kernel_state()->memory()->LookupHeap(base_address);
HeapAllocationInfo alloc_info;
if (heap == nullptr || !heap->QueryRegionInfo(base_address, &alloc_info)) {
return X_STATUS_INVALID_PARAMETER;
}
memory_basic_information_ptr->base_address = alloc_info.base_address;
memory_basic_information_ptr->allocation_base = alloc_info.allocation_base;
memory_basic_information_ptr->allocation_protect =
ToXdkProtectFlags(alloc_info.allocation_protect);
memory_basic_information_ptr->region_size = alloc_info.region_size;
// https://docs.microsoft.com/en-us/windows/win32/api/winnt/ns-winnt-memory_basic_information
// State: ... This member can be one of the following values: MEM_COMMIT,
// MEM_FREE, MEM_RESERVE.
// State queried by Beautiful Katamari before displaying the loading screen.
uint32_t x_state;
if (alloc_info.state & kMemoryAllocationCommit) {
assert_not_zero(alloc_info.state & kMemoryAllocationReserve);
x_state = X_MEM_COMMIT;
} else if (alloc_info.state & kMemoryAllocationReserve) {
x_state = X_MEM_RESERVE;
} else {
x_state = X_MEM_FREE;
}
memory_basic_information_ptr->state = x_state;
memory_basic_information_ptr->protect = ToXdkProtectFlags(alloc_info.protect);
memory_basic_information_ptr->type = X_MEM_PRIVATE;
return X_STATUS_SUCCESS;
}
DECLARE_XBOXKRNL_EXPORT1(NtQueryVirtualMemory, kMemory, kImplemented);
dword_result_t MmAllocatePhysicalMemoryEx(dword_t flags, dword_t region_size,
dword_t protect_bits,
dword_t min_addr_range,
dword_t max_addr_range,
dword_t alignment) {
// Type will usually be 0 (user request?), where 1 and 2 are sometimes made
// by D3D/etc.
// Check protection bits.
if (!(protect_bits & (X_PAGE_READONLY | X_PAGE_READWRITE))) {
XELOGE("MmAllocatePhysicalMemoryEx: bad protection bits");
return 0;
}
// Either may be OR'ed into protect_bits:
// X_PAGE_NOCACHE
// X_PAGE_WRITECOMBINE
// We could use this to detect what's likely GPU-synchronized memory
// and let the GPU know we're messing with it (or even allocate from
// the GPU). At least the D3D command buffer is X_PAGE_WRITECOMBINE.
// Calculate page size.
// Default = 4KB
// X_MEM_LARGE_PAGES = 64KB
// X_MEM_16MB_PAGES = 16MB
uint32_t page_size = 4 * 1024;
if (protect_bits & X_MEM_LARGE_PAGES) {
page_size = 64 * 1024;
} else if (protect_bits & X_MEM_16MB_PAGES) {
page_size = 16 * 1024 * 1024;
}
// Round up the region size and alignment to the next page.
uint32_t adjusted_size = xe::round_up(region_size, page_size);
uint32_t adjusted_alignment = xe::round_up(alignment, page_size);
uint32_t allocation_type = kMemoryAllocationReserve | kMemoryAllocationCommit;
uint32_t protect = FromXdkProtectFlags(protect_bits);
bool top_down = true;
auto heap = static_cast<PhysicalHeap*>(
kernel_memory()->LookupHeapByType(true, page_size));
// min_addr_range/max_addr_range are bounds in physical memory, not virtual.
uint32_t heap_base = heap->heap_base();
uint32_t heap_physical_address_offset = heap->GetPhysicalAddress(heap_base);
uint32_t heap_min_addr =
xe::sat_sub(min_addr_range.value(), heap_physical_address_offset);
uint32_t heap_max_addr =
xe::sat_sub(max_addr_range.value(), heap_physical_address_offset);
uint32_t heap_size = heap->heap_size();
heap_min_addr = heap_base + std::min(heap_min_addr, heap_size - 1);
heap_max_addr = heap_base + std::min(heap_max_addr, heap_size - 1);
uint32_t base_address;
if (!heap->AllocRange(heap_min_addr, heap_max_addr, adjusted_size,
adjusted_alignment, allocation_type, protect, top_down,
&base_address)) {
// Failed - assume no memory available.
return 0;
}
XELOGD("MmAllocatePhysicalMemoryEx = {:08X}", base_address);
return base_address;
}
DECLARE_XBOXKRNL_EXPORT1(MmAllocatePhysicalMemoryEx, kMemory, kImplemented);
dword_result_t MmAllocatePhysicalMemory(dword_t flags, dword_t region_size,
dword_t protect_bits) {
return MmAllocatePhysicalMemoryEx(flags, region_size, protect_bits, 0,
0xFFFFFFFFu, 0);
}
DECLARE_XBOXKRNL_EXPORT1(MmAllocatePhysicalMemory, kMemory, kImplemented);
void MmFreePhysicalMemory(dword_t type, dword_t base_address) {
// base_address = result of MmAllocatePhysicalMemory.
assert_true((base_address & 0x1F) == 0);
auto heap = kernel_state()->memory()->LookupHeap(base_address);
heap->Release(base_address);
}
DECLARE_XBOXKRNL_EXPORT1(MmFreePhysicalMemory, kMemory, kImplemented);
dword_result_t MmQueryAddressProtect(dword_t base_address) {
auto heap = kernel_state()->memory()->LookupHeap(base_address);
uint32_t access;
if (!heap->QueryProtect(base_address, &access)) {
access = 0;
}
access = ToXdkProtectFlags(access);
return access;
}
DECLARE_XBOXKRNL_EXPORT2(MmQueryAddressProtect, kMemory, kImplemented,
kHighFrequency);
void MmSetAddressProtect(lpvoid_t base_address, dword_t region_size,
dword_t protect_bits) {
uint32_t protect = FromXdkProtectFlags(protect_bits);
auto heap = kernel_memory()->LookupHeap(base_address);
heap->Protect(base_address.guest_address(), region_size, protect);
}
DECLARE_XBOXKRNL_EXPORT1(MmSetAddressProtect, kMemory, kImplemented);
dword_result_t MmQueryAllocationSize(lpvoid_t base_address) {
auto heap = kernel_state()->memory()->LookupHeap(base_address);
uint32_t size;
if (!heap->QuerySize(base_address, &size)) {
size = 0;
}
return size;
}
DECLARE_XBOXKRNL_EXPORT1(MmQueryAllocationSize, kMemory, kImplemented);
// https://code.google.com/p/vdash/source/browse/trunk/vdash/include/kernel.h
struct X_MM_QUERY_STATISTICS_SECTION {
xe::be<uint32_t> available_pages;
xe::be<uint32_t> total_virtual_memory_bytes;
xe::be<uint32_t> reserved_virtual_memory_bytes;
xe::be<uint32_t> physical_pages;
xe::be<uint32_t> pool_pages;
xe::be<uint32_t> stack_pages;
xe::be<uint32_t> image_pages;
xe::be<uint32_t> heap_pages;
xe::be<uint32_t> virtual_pages;
xe::be<uint32_t> page_table_pages;
xe::be<uint32_t> cache_pages;
};
struct X_MM_QUERY_STATISTICS_RESULT {
xe::be<uint32_t> size;
xe::be<uint32_t> total_physical_pages;
xe::be<uint32_t> kernel_pages;
X_MM_QUERY_STATISTICS_SECTION title;
X_MM_QUERY_STATISTICS_SECTION system;
xe::be<uint32_t> highest_physical_page;
};
static_assert_size(X_MM_QUERY_STATISTICS_RESULT, 104);
dword_result_t MmQueryStatistics(
pointer_t<X_MM_QUERY_STATISTICS_RESULT> stats_ptr) {
if (!stats_ptr) {
return X_STATUS_INVALID_PARAMETER;
}
const uint32_t size = sizeof(X_MM_QUERY_STATISTICS_RESULT);
if (stats_ptr->size != size) {
return X_STATUS_BUFFER_TOO_SMALL;
}
// Zero out the struct.
stats_ptr.Zero();
// Set the constants the game is likely asking for.
// These numbers are mostly guessed. If the game is just checking for
// memory, this should satisfy it. If it's actually verifying things
// this won't work :/
stats_ptr->size = size;
stats_ptr->total_physical_pages = 0x00020000; // 512mb / 4kb pages
stats_ptr->kernel_pages = 0x00000300;
// TODO(gibbed): maybe use LookupHeapByType instead?
auto heap_a = kernel_memory()->LookupHeap(0xA0000000);
auto heap_c = kernel_memory()->LookupHeap(0xC0000000);
auto heap_e = kernel_memory()->LookupHeap(0xE0000000);
assert_not_null(heap_a);
assert_not_null(heap_c);
assert_not_null(heap_e);
#define GET_USED_PAGE_COUNT(x) \
(x->GetTotalPageCount() - x->GetUnreservedPageCount())
#define GET_USED_PAGE_SIZE(x) ((GET_USED_PAGE_COUNT(x) * x->page_size()) / 4096)
uint32_t used_pages = 0;
used_pages += GET_USED_PAGE_SIZE(heap_a);
used_pages += GET_USED_PAGE_SIZE(heap_c);
used_pages += GET_USED_PAGE_SIZE(heap_e);
#undef GET_USED_PAGE_SIZE
#undef GET_USED_PAGE_COUNT
assert_true(used_pages < stats_ptr->total_physical_pages);
stats_ptr->title.available_pages =
stats_ptr->total_physical_pages - used_pages;
stats_ptr->title.total_virtual_memory_bytes =
0x2FFF0000; // TODO(gibbed): FIXME
stats_ptr->title.reserved_virtual_memory_bytes =
0x00160000; // TODO(gibbed): FIXME
stats_ptr->title.physical_pages = 0x00001000; // TODO(gibbed): FIXME
stats_ptr->title.pool_pages = 0x00000010;
stats_ptr->title.stack_pages = 0x00000100;
stats_ptr->title.image_pages = 0x00000100;
stats_ptr->title.heap_pages = 0x00000100;
stats_ptr->title.virtual_pages = 0x00000100;
stats_ptr->title.page_table_pages = 0x00000100;
stats_ptr->title.cache_pages = 0x00000100;
stats_ptr->system.available_pages = 0x00000000;
stats_ptr->system.total_virtual_memory_bytes = 0x00000000;
stats_ptr->system.reserved_virtual_memory_bytes = 0x00000000;
stats_ptr->system.physical_pages = 0x00000000;
stats_ptr->system.pool_pages = 0x00000000;
stats_ptr->system.stack_pages = 0x00000000;
stats_ptr->system.image_pages = 0x00000000;
stats_ptr->system.heap_pages = 0x00000000;
stats_ptr->system.virtual_pages = 0x00000000;
stats_ptr->system.page_table_pages = 0x00000000;
stats_ptr->system.cache_pages = 0x00000000;
stats_ptr->highest_physical_page = 0x0001FFFF;
return X_STATUS_SUCCESS;
}
DECLARE_XBOXKRNL_EXPORT1(MmQueryStatistics, kMemory, kImplemented);
// https://msdn.microsoft.com/en-us/library/windows/hardware/ff554547(v=vs.85).aspx
dword_result_t MmGetPhysicalAddress(dword_t base_address) {
// PHYSICAL_ADDRESS MmGetPhysicalAddress(
// _In_ PVOID BaseAddress
// );
// base_address = result of MmAllocatePhysicalMemory.
uint32_t physical_address = kernel_memory()->GetPhysicalAddress(base_address);
assert_true(physical_address != UINT32_MAX);
if (physical_address == UINT32_MAX) {
physical_address = 0;
}
return physical_address;
}
DECLARE_XBOXKRNL_EXPORT1(MmGetPhysicalAddress, kMemory, kImplemented);
dword_result_t MmMapIoSpace(dword_t unk0, lpvoid_t src_address, dword_t size,
dword_t flags) {
// I've only seen this used to map XMA audio contexts.
// The code seems fine with taking the src address, so this just returns that.
// If others start using it there could be problems.
assert_true(unk0 == 2);
assert_true(size == 0x40);
assert_true(flags == 0x404);
return src_address.guest_address();
}
DECLARE_XBOXKRNL_EXPORT1(MmMapIoSpace, kMemory, kImplemented);
dword_result_t ExAllocatePoolTypeWithTag(dword_t size, dword_t tag,
dword_t zero) {
uint32_t alignment = 8;
uint32_t adjusted_size = size;
if (adjusted_size < 4 * 1024) {
adjusted_size = xe::round_up(adjusted_size, 4 * 1024);
} else {
alignment = 4 * 1024;
}
uint32_t addr =
kernel_state()->memory()->SystemHeapAlloc(adjusted_size, alignment);
return addr;
}
DECLARE_XBOXKRNL_EXPORT1(ExAllocatePoolTypeWithTag, kMemory, kImplemented);
dword_result_t ExAllocatePool(dword_t size) {
const uint32_t none = 0x656E6F4E; // 'None'
return ExAllocatePoolTypeWithTag(size, none, 0);
}
DECLARE_XBOXKRNL_EXPORT1(ExAllocatePool, kMemory, kImplemented);
void ExFreePool(lpvoid_t base_address) {
kernel_state()->memory()->SystemHeapFree(base_address);
}
DECLARE_XBOXKRNL_EXPORT1(ExFreePool, kMemory, kImplemented);
dword_result_t KeGetImagePageTableEntry(lpvoid_t address) {
// Unknown
return 1;
}
DECLARE_XBOXKRNL_EXPORT1(KeGetImagePageTableEntry, kMemory, kStub);
dword_result_t KeLockL2() {
// TODO
return 0;
}
DECLARE_XBOXKRNL_EXPORT1(KeLockL2, kMemory, kStub);
void KeUnlockL2() {}
DECLARE_XBOXKRNL_EXPORT1(KeUnlockL2, kMemory, kStub);
dword_result_t MmCreateKernelStack(dword_t stack_size, dword_t r4) {
assert_zero(r4); // Unknown argument.
auto stack_size_aligned = (stack_size + 0xFFF) & 0xFFFFF000;
uint32_t stack_alignment = (stack_size & 0xF000) ? 0x1000 : 0x10000;
uint32_t stack_address;
kernel_memory()
->LookupHeap(0x70000000)
->AllocRange(0x70000000, 0x7F000000, stack_size_aligned, stack_alignment,
kMemoryAllocationReserve | kMemoryAllocationCommit,
kMemoryProtectRead | kMemoryProtectWrite, false,
&stack_address);
return stack_address + stack_size;
}
DECLARE_XBOXKRNL_EXPORT1(MmCreateKernelStack, kMemory, kImplemented);
dword_result_t MmDeleteKernelStack(lpvoid_t stack_base, lpvoid_t stack_end) {
// Release the stack (where stack_end is the low address)
if (kernel_memory()->LookupHeap(0x70000000)->Release(stack_end)) {
return X_STATUS_SUCCESS;
}
return X_STATUS_UNSUCCESSFUL;
}
DECLARE_XBOXKRNL_EXPORT1(MmDeleteKernelStack, kMemory, kImplemented);
void RegisterMemoryExports(xe::cpu::ExportResolver* export_resolver,
KernelState* kernel_state) {}
} // namespace xboxkrnl
} // namespace kernel
} // namespace xe
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