diff options
Diffstat (limited to 'tun/wintun/memmod/zsyscall_windows.go')
-rw-r--r-- | tun/wintun/memmod/zsyscall_windows.go | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/tun/wintun/memmod/zsyscall_windows.go b/tun/wintun/memmod/zsyscall_windows.go new file mode 100644 index 0000000..c56b650 --- /dev/null +++ b/tun/wintun/memmod/zsyscall_windows.go @@ -0,0 +1,70 @@ +// Code generated by 'go generate'; DO NOT EDIT. + +package memmod + +import ( + "syscall" + "unsafe" + + "golang.org/x/sys/windows" +) + +var _ unsafe.Pointer + +// Do the interface allocations only once for common +// Errno values. +const ( + errnoERROR_IO_PENDING = 997 +) + +var ( + errERROR_IO_PENDING error = syscall.Errno(errnoERROR_IO_PENDING) + errERROR_EINVAL error = syscall.EINVAL +) + +// errnoErr returns common boxed Errno values, to prevent +// allocations at runtime. +func errnoErr(e syscall.Errno) error { + switch e { + case 0: + return errERROR_EINVAL + case errnoERROR_IO_PENDING: + return errERROR_IO_PENDING + } + // TODO: add more here, after collecting data on the common + // error values see on Windows. (perhaps when running + // all.bat?) + return e +} + +var ( + modkernel32 = windows.NewLazySystemDLL("kernel32.dll") + + procGetProcAddress = modkernel32.NewProc("GetProcAddress") + procIsBadReadPtr = modkernel32.NewProc("IsBadReadPtr") + procLoadLibraryA = modkernel32.NewProc("LoadLibraryA") +) + +func getProcAddress(module windows.Handle, procName *byte) (addr uintptr, err error) { + r0, _, e1 := syscall.Syscall(procGetProcAddress.Addr(), 2, uintptr(module), uintptr(unsafe.Pointer(procName)), 0) + addr = uintptr(r0) + if addr == 0 { + err = errnoErr(e1) + } + return +} + +func isBadReadPtr(addr uintptr, ucb uintptr) (ret bool) { + r0, _, _ := syscall.Syscall(procIsBadReadPtr.Addr(), 2, uintptr(addr), uintptr(ucb), 0) + ret = r0 != 0 + return +} + +func loadLibraryA(libFileName *byte) (module windows.Handle, err error) { + r0, _, e1 := syscall.Syscall(procLoadLibraryA.Addr(), 1, uintptr(unsafe.Pointer(libFileName)), 0, 0) + module = windows.Handle(r0) + if module == 0 { + err = errnoErr(e1) + } + return +} |