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add FFI & wrappers for NtAllocateVirtualMemory & NtFreeVirtualMemory + add missing alloction constants MEM_RESERVE_PLACEHOLDER / MEM_PRESERVE_PLACEHOLDER

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ziggoon 2025-03-04 22:10:49 -06:00
parent 16875b3598
commit 5b03e248b7
2 changed files with 51 additions and 0 deletions
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34
lib/std/os/windows.zig
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@ -1758,6 +1758,38 @@ pub fn TerminateProcess(hProcess: HANDLE, uExitCode: UINT) TerminateProcessError
}
}
pub const NtAllocateVirtualMemoryError = error{
AccessDenied,
InvalidParameter,
NoMemory,
Unexpected,
};
pub fn NtAllocateVirtualMemory(hProcess: HANDLE, addr: ?*PVOID, zero_bits: ULONG_PTR, size: ?*SIZE_T, alloc_type: ULONG, protect: ULONG) NtAllocateVirtualMemoryError!void {
return switch (ntdll.NtAllocateVirtualMemory(hProcess, addr, zero_bits, size, alloc_type, protect)) {
.SUCCESS => return,
.ACCESS_DENIED => NtAllocateVirtualMemoryError.AccessDenied,
.INVALID_PARAMETER => NtAllocateVirtualMemoryError.InvalidParameter,
.NO_MEMORY => NtAllocateVirtualMemoryError.NoMemory,
else => |st| unexpectedStatus(st),
};
}
pub const NtFreeVirtualMemoryError = error{
AccessDenied,
InvalidParameter,
Unexpected,
};
pub fn NtFreeVirtualMemory(hProcess: HANDLE, addr: ?*PVOID, size: *SIZE_T, free_type: ULONG) NtFreeVirtualMemoryError!void {
return switch (ntdll.NtFreeVirtualMemory(hProcess, addr, size, free_type)) {
.SUCCESS => return,
.ACCESS_DENIED => NtFreeVirtualMemoryError.AccessDenied,
.INVALID_PARAMETER => NtFreeVirtualMemoryError.InvalidParameter,
else => NtFreeVirtualMemoryError.Unexpected,
};
}
pub const VirtualAllocError = error{Unexpected};
pub fn VirtualAlloc(addr: ?LPVOID, size: usize, alloc_type: DWORD, flProtect: DWORD) VirtualAllocError!LPVOID {
@ -3539,6 +3571,8 @@ pub const MEM_LARGE_PAGES = 0x20000000;
pub const MEM_PHYSICAL = 0x400000;
pub const MEM_TOP_DOWN = 0x100000;
pub const MEM_WRITE_WATCH = 0x200000;
pub const MEM_RESERVE_PLACEHOLDER = 0x00040000;
pub const MEM_PRESERVE_PLACEHOLDER = 0x00000400;
// Protect values
pub const PAGE_EXECUTE = 0x10;

17
lib/std/os/windows/ntdll.zig
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@ -5,6 +5,7 @@ const BOOL = windows.BOOL;
const DWORD = windows.DWORD;
const DWORD64 = windows.DWORD64;
const ULONG = windows.ULONG;
const ULONG_PTR = windows.ULONG_PTR;
const NTSTATUS = windows.NTSTATUS;
const WORD = windows.WORD;
const HANDLE = windows.HANDLE;
@ -358,3 +359,19 @@ pub extern "ntdll" fn NtCreateNamedPipeFile(
OutboundQuota: ULONG,
DefaultTimeout: *LARGE_INTEGER,
) callconv(.winapi) NTSTATUS;
pub extern "ntdll" fn NtAllocateVirtualMemory(
ProcessHandle: HANDLE,
BaseAddress: ?*PVOID,
ZeroBits: ULONG_PTR,
RegionSize: ?*SIZE_T,
AllocationType: ULONG,
PageProtection: ULONG,
) callconv(.winapi) NTSTATUS;
pub extern "ntdll" fn NtFreeVirtualMemory(
ProcessHandle: HANDLE,
BaseAddress: ?*PVOID,
RegionSize: *SIZE_T,
FreeType: ULONG,
) callconv(.winapi) NTSTATUS;