[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows versio
From: |
Bin Meng |
Subject: |
Re: [PATCH 2/5] util/oslib-win32: Add a helper to get the Windows version |
Date: |
Wed, 27 Jul 2022 21:15:21 +0800 |
On Wed, Jul 27, 2022 at 8:53 PM Daniel P. Berrangé <berrange@redhat.com> wrote:
>
> On Wed, Jul 27, 2022 at 07:55:40PM +0800, Bin Meng wrote:
> > On Wed, Jul 27, 2022 at 6:00 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 ?
> > >
> >
> > I believe #include <ddk/ntddk.h> is used in the kernel mode driver
> > programming environment.
> > In the user space we will have to use the ntdll exported symbol.
> >
> > I cannot locate a Microsoft doc that tells us to call RtlGetVersion
> > directly in the user space.
>
> I wonder if we actually need to add this helper API to QEMU at all.
>
> Would it be possible to use GLib 's g_win32_check_windows_version API
> instead ?
>
> https://developer-old.gnome.org/glib/unstable/glib-Windows-Compatibility-Functions.html#g-win32-check-windows-version
>
I am afraid not. g_win32_check_windows_version API does not provide
detailed build number like RtlGetVersion does.
Regards,
Bin
- [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, 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,
Bin Meng <=
- 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