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windows: allow determining if running 32-on-64bit

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This is useful for determining whether or not it's going to be possible
to install device drivers, for example.

Change-Id: I628c6f3279b16832bcd6b4ca66dfa3e7334b88ff
Reviewed-on: https://go-review.googlesource.com/c/sys/+/178897
Run-TryBot: Jason Donenfeld <Jason@zx2c4.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
This commit is contained in:
Jason A. Donenfeld
2019-05-25 15:13:12 +02:00
committed by Alex Brainman
parent 2219a0101f
commit 791d8a0f4d
2 changed files with 14 additions and 0 deletions
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1
windows/syscall_windows.go
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@@ -138,6 +138,7 @@ func NewCallbackCDecl(fn interface{}) uintptr {
//sys GetVersion() (ver uint32, err error)
//sys FormatMessage(flags uint32, msgsrc uintptr, msgid uint32, langid uint32, buf []uint16, args *byte) (n uint32, err error) = FormatMessageW
//sys ExitProcess(exitcode uint32)
//sys IsWow64Process(handle Handle, isWow64 *bool) (err error) = IsWow64Process
//sys CreateFile(name *uint16, access uint32, mode uint32, sa *SecurityAttributes, createmode uint32, attrs uint32, templatefile Handle) (handle Handle, err error) [failretval==InvalidHandle] = CreateFileW
//sys ReadFile(handle Handle, buf []byte, done *uint32, overlapped *Overlapped) (err error)
//sys WriteFile(handle Handle, buf []byte, done *uint32, overlapped *Overlapped) (err error)

13
windows/zsyscall_windows.go
View File

@@ -76,6 +76,7 @@ var (
procGetVersion = modkernel32.NewProc("GetVersion")
procFormatMessageW = modkernel32.NewProc("FormatMessageW")
procExitProcess = modkernel32.NewProc("ExitProcess")
procIsWow64Process = modkernel32.NewProc("IsWow64Process")
procCreateFileW = modkernel32.NewProc("CreateFileW")
procReadFile = modkernel32.NewProc("ReadFile")
procWriteFile = modkernel32.NewProc("WriteFile")
@@ -646,6 +647,18 @@ func ExitProcess(exitcode uint32) {
return
}
func IsWow64Process(handle Handle, isWow64 *bool) (err error) {
r1, _, e1 := syscall.Syscall(procIsWow64Process.Addr(), 2, uintptr(handle), uintptr(unsafe.Pointer(isWow64)), 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func CreateFile(name *uint16, access uint32, mode uint32, sa *SecurityAttributes, createmode uint32, attrs uint32, templatefile Handle) (handle Handle, err error) {
r0, _, e1 := syscall.Syscall9(procCreateFileW.Addr(), 7, uintptr(unsafe.Pointer(name)), uintptr(access), uintptr(mode), uintptr(unsafe.Pointer(sa)), uintptr(createmode), uintptr(attrs), uintptr(templatefile), 0, 0)
handle = Handle(r0)