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windows: add IsWow64Process2 for detecting x86 on arm

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The original IsWow64Process returns false on arm, always, and so
IsWow64Process2 was added to account for this scenario. This isn't
available on older versions of Windows, so we mark it as such using the
new '?' notation. Finally, we add a test to make sure this all works and
does the expected thing on different versions of Windows.

Change-Id: Ic0412578cfb3f4cf6c9dc92a0028abc579bf6c85
Reviewed-on: https://go-review.googlesource.com/c/sys/+/269077
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Trust: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld
2020-11-13 23:30:24 +00:00
parent cec591ef54
commit 12cec1faf1
3 changed files with 42 additions and 0 deletions
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windows/syscall_windows.go
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@@ -174,6 +174,7 @@ func NewCallbackCDecl(fn interface{}) uintptr {
//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 IsWow64Process2(handle Handle, processMachine *uint16, nativeMachine *uint16) (err error) = IsWow64Process2?
//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)