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Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows versio
From: |
Yan Vugenfirer |
Subject: |
Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version |
Date: |
Wed, 27 Jul 2022 13:57:46 +0300 |
On Wed, Jul 27, 2022 at 1:00 PM Daniel P. Berrangé <berrange@redhat.com> wrote:
>
> On Wed, Jul 27, 2022 at 05:38:27PM +0800, Bin Meng wrote:
> > On Wed, Jul 27, 2022 at 4:50 PM Yan Vugenfirer <yvugenfi@redhat.com> wrote:
> > >
> > > On Wed, Jul 27, 2022 at 10:43 AM Bin Meng <bmeng.cn@gmail.com> wrote:
> > > >
> > > > From: Bin Meng <bin.meng@windriver.com>
> > > >
> > > > This adds a helper to get the Windows version via the RtlGetVersion
> > > > call, for QEMU codes to determine the Windows version at run-time.
> > > >
> > > > Signed-off-by: Xuzhou Cheng <xuzhou.cheng@windriver.com>
> > > > Signed-off-by: Bin Meng <bin.meng@windriver.com>
> > > > ---
> > > >
> > > > include/sysemu/os-win32.h | 2 ++
> > > > util/oslib-win32.c | 15 +++++++++++++++
> > > > 2 files changed, 17 insertions(+)
> > > >
> > > > diff --git a/include/sysemu/os-win32.h b/include/sysemu/os-win32.h
> > > > index edc3b38a57..1e324026a4 100644
> > > > --- a/include/sysemu/os-win32.h
> > > > +++ b/include/sysemu/os-win32.h
> > > > @@ -204,6 +204,8 @@ ssize_t qemu_recv_wrap(int sockfd, void *buf,
> > > > size_t len, int flags);
> > > > ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int
> > > > flags,
> > > > struct sockaddr *addr, socklen_t *addrlen);
> > > >
> > > > +void os_get_win_version(RTL_OSVERSIONINFOEXW *info);
> > > > +
> > > > #ifdef __cplusplus
> > > > }
> > > > #endif
> > > > diff --git a/util/oslib-win32.c b/util/oslib-win32.c
> > > > index 5723d3eb4c..6d2387b9ff 100644
> > > > --- a/util/oslib-win32.c
> > > > +++ b/util/oslib-win32.c
> > > > @@ -547,3 +547,18 @@ int qemu_msync(void *addr, size_t length, int fd)
> > > > */
> > > > return qemu_fdatasync(fd);
> > > > }
> > > > +
> > > > +void os_get_win_version(RTL_OSVERSIONINFOEXW *info)
> > > > +{
> > > > + typedef LONG (WINAPI *rtl_get_version_t)(PRTL_OSVERSIONINFOEXW);
> > > > +
> > > > + /* RtlGetVersion is available starting with Windows 2000 */
> > > > + HMODULE module = GetModuleHandle("ntdll");
> > > > + PVOID fun = GetProcAddress(module, "RtlGetVersion");
> > > > + rtl_get_version_t rtl_get_version = (rtl_get_version_t)fun;
> > > > +
> > > > + info->dwOSVersionInfoSize = sizeof(RTL_OSVERSIONINFOEXW);
> > > > + rtl_get_version(info);
> > > The original function, when it was present in qemu-ga, tested that
> > > getting the function address succeeded.
> > > I think this test should be kept.
> > > See below:
> > > - PVOID fun = GetProcAddress(module, "RtlGetVersion");
> > > - if (fun == NULL) {
> > > - error_setg(errp, QERR_QGA_COMMAND_FAILED,
> > > - "Failed to get address of RtlGetVersion");
> > > - return;
> > > - }
> > >
> >
> > Please see the comment:
> >
> > /* RtlGetVersion is available starting with Windows 2000 */
> >
> > I don't think we need that check.
>
> In include/qemu/osdep.h we have
>
> /* as defined in sdkddkver.h */
> #ifndef _WIN32_WINNT
> #define _WIN32_WINNT 0x0601 /* Windows 7 API (should be in sync with glib) */
> #endif
>
> so do we even need to have the GetProcAddress calls at all ?
>
> Surely we can just '#include <ddk/ntddk.h>' and call
> RtlGetVersion directly at compile time ?
Yes.
https://docs.microsoft.com/en-us/windows-hardware/drivers/ddi/wdm/nf-wdm-rtlgetversion
- RtlGetVersion is available from Windows 2000.
Best regards,
Yan.
>
>
> With regards,
> Daniel
> --
> |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :|
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>
- [PATCH 0/5] Enable unix socket support on Windows, Bin Meng, 2022/07/27
- [PATCH 1/5] util/qemu-sockets: Replace the call to close a socket with closesocket(), Bin Meng, 2022/07/27
- [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version, Bin Meng, 2022/07/27
- Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version, Yan Vugenfirer, 2022/07/27
- Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version, Bin Meng, 2022/07/27
- Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version, Daniel P . Berrangé, 2022/07/27
- Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version,
Yan Vugenfirer <=
- Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version, Bin Meng, 2022/07/27
- Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version, Daniel P . Berrangé, 2022/07/27
- Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version, Bin Meng, 2022/07/27
- Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version, Konstantin Kostiuk, 2022/07/27
- Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version, Bin Meng, 2022/07/27
[PATCH 3/5] qga/commands-win32: Use os_get_win_version(), Bin Meng, 2022/07/27
[PATCH 4/5] util/qemu-sockets: Enable unix socket support on Windows, Bin Meng, 2022/07/27