* autoload.cc (GetSystemDEPPolicy): Define.
(GetProcessDEPPolicy): Ditto. (SetProcessDEPPolicy): Ditto. * dcrt0.cc (disable_dep): New static function. (dll_crt0_0): Call disable_dep on platforms requiring it. Add longish comment to explain the circumstances. * wincap.h (wincaps::ts_has_dep_problem): New element. * wincap.cc: Implement above element throughout. (wincapc::init): Set ts_has_dep_problem to true on 2008 Terminal Servers. * winsup.h (WINVER): Set to 0x0601.
This commit is contained in:
Corinna Vinschen
parent
bef8896587
commit
babd4a9c62
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@ -1,3 +1,17 @@
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2008-11-11 Corinna Vinschen <corinna@vinschen.de>
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* autoload.cc (GetSystemDEPPolicy): Define.
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(GetProcessDEPPolicy): Ditto.
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(SetProcessDEPPolicy): Ditto.
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* dcrt0.cc (disable_dep): New static function.
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(dll_crt0_0): Call disable_dep on platforms requiring it. Add longish
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comment to explain the circumstances.
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* wincap.h (wincaps::ts_has_dep_problem): New element.
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* wincap.cc: Implement above element throughout.
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(wincapc::init): Set ts_has_dep_problem to true on 2008 Terminal
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Servers.
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* winsup.h (WINVER): Set to 0x0601.
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2008-11-11 Corinna Vinschen <corinna@vinschen.de>
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* mount.cc (mount_info::cygdrive_win32_path): Always upper case
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@ -413,6 +413,9 @@ LoadDLLfuncEx (FindVolumeClose, 4, kernel32, 1)
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LoadDLLfuncEx (GetConsoleWindow, 0, kernel32, 1)
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LoadDLLfuncEx (GetSystemWindowsDirectoryW, 8, kernel32, 1)
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LoadDLLfuncEx (GetVolumeNameForVolumeMountPointA, 12, kernel32, 1)
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LoadDLLfuncEx (GetSystemDEPPolicy, 0, kernel32, 1)
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LoadDLLfuncEx (GetProcessDEPPolicy, 12, kernel32, 1)
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LoadDLLfuncEx (SetProcessDEPPolicy, 4, kernel32, 1)
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LoadDLLfunc (SHGetDesktopFolder, 4, shell32)
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@ -686,6 +686,31 @@ child_info_spawn::handle_spawn ()
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fixup_lockf_after_exec ();
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}
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static DEP_SYSTEM_POLICY_TYPE dep_system_policy = (DEP_SYSTEM_POLICY_TYPE) -1;
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static void
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disable_dep ()
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{
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DWORD ppolicy;
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BOOL perm;
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if (dep_system_policy < 0)
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{
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dep_system_policy = GetSystemDEPPolicy ();
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debug_printf ("DEP System Policy: %d", (int) dep_system_policy);
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}
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if (dep_system_policy < OptIn)
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return;
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if (!GetProcessDEPPolicy (hMainProc, &ppolicy, &perm))
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{
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debug_printf ("GetProcessDEPPolicy: %E");
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return;
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}
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debug_printf ("DEP Process Policy: %d (permanent = %d)", ppolicy, perm);
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if (ppolicy > 0 && !perm && !SetProcessDEPPolicy (0))
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debug_printf ("SetProcessDEPPolicy: %E");
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}
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void __stdcall
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dll_crt0_0 ()
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{
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@ -750,6 +775,27 @@ dll_crt0_0 ()
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events_init ();
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tty_list::init_session ();
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/* FIXME: This is hopefully a temporary hack, at least until the support
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case at Microsoft has been closed one way or the other.
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The disable_dep function disables DEP for all Cygwin processes if
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the process runs on a Windows Server 2008 with Terminal Services
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installed. This combination (TS+DEP) breaks *some* Cygwin
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applications. The Terminal Service specific DLL tsappcmp.dll
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changes the page protection of some pages in the application's text
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segment from PAGE_EXECUTE_WRITECOPY to PAGE_WRITECOPY for no
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apparent reason. This occurs before any Cygwin or applicaton code
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had a chance to run. MS has no explanation for this so far, but is
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rather busy trying to avoid giving support for this problem (as of
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2008-11-11).
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Unfortunately disabling DEP seems to have a not negligible
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performance hit. In the long run, either MS has to fix their
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problem, or we have to find a better workaround, if any exists.
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Idle idea: Adding EXECUTE protection to all text segment pages? */
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if (wincap.ts_has_dep_problem ())
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disable_dep ();
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debug_printf ("finished dll_crt0_0 initialization");
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}
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@ -50,6 +50,7 @@ wincaps wincap_unknown __attribute__((section (".cygwin_dll_common"), shared)) =
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supports_all_posix_ai_flags:false,
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has_restricted_stack_args:false,
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has_transactions:false,
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ts_has_dep_problem:false,
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};
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wincaps wincap_nt4 __attribute__((section (".cygwin_dll_common"), shared)) = {
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@ -82,6 +83,7 @@ wincaps wincap_nt4 __attribute__((section (".cygwin_dll_common"), shared)) = {
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supports_all_posix_ai_flags:false,
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has_restricted_stack_args:false,
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has_transactions:false,
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ts_has_dep_problem:false,
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};
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wincaps wincap_nt4sp4 __attribute__((section (".cygwin_dll_common"), shared)) = {
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@ -114,6 +116,7 @@ wincaps wincap_nt4sp4 __attribute__((section (".cygwin_dll_common"), shared)) =
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supports_all_posix_ai_flags:false,
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has_restricted_stack_args:false,
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has_transactions:false,
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ts_has_dep_problem:false,
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};
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wincaps wincap_2000 __attribute__((section (".cygwin_dll_common"), shared)) = {
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@ -146,6 +149,7 @@ wincaps wincap_2000 __attribute__((section (".cygwin_dll_common"), shared)) = {
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supports_all_posix_ai_flags:false,
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has_restricted_stack_args:false,
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has_transactions:false,
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ts_has_dep_problem:false,
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};
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wincaps wincap_2000sp4 __attribute__((section (".cygwin_dll_common"), shared)) = {
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@ -178,6 +182,7 @@ wincaps wincap_2000sp4 __attribute__((section (".cygwin_dll_common"), shared)) =
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supports_all_posix_ai_flags:false,
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has_restricted_stack_args:false,
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has_transactions:false,
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ts_has_dep_problem:false,
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};
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wincaps wincap_xp __attribute__((section (".cygwin_dll_common"), shared)) = {
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@ -210,6 +215,7 @@ wincaps wincap_xp __attribute__((section (".cygwin_dll_common"), shared)) = {
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supports_all_posix_ai_flags:false,
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has_restricted_stack_args:false,
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has_transactions:false,
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ts_has_dep_problem:false,
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};
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wincaps wincap_xpsp1 __attribute__((section (".cygwin_dll_common"), shared)) = {
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@ -242,6 +248,7 @@ wincaps wincap_xpsp1 __attribute__((section (".cygwin_dll_common"), shared)) = {
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supports_all_posix_ai_flags:false,
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has_restricted_stack_args:false,
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has_transactions:false,
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ts_has_dep_problem:false,
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};
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wincaps wincap_xpsp2 __attribute__((section (".cygwin_dll_common"), shared)) = {
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@ -274,6 +281,7 @@ wincaps wincap_xpsp2 __attribute__((section (".cygwin_dll_common"), shared)) = {
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supports_all_posix_ai_flags:false,
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has_restricted_stack_args:false,
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has_transactions:false,
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ts_has_dep_problem:false,
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};
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wincaps wincap_2003 __attribute__((section (".cygwin_dll_common"), shared)) = {
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@ -306,6 +314,7 @@ wincaps wincap_2003 __attribute__((section (".cygwin_dll_common"), shared)) = {
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supports_all_posix_ai_flags:false,
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has_restricted_stack_args:true,
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has_transactions:false,
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ts_has_dep_problem:false,
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};
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wincaps wincap_vista __attribute__((section (".cygwin_dll_common"), shared)) = {
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@ -338,6 +347,7 @@ wincaps wincap_vista __attribute__((section (".cygwin_dll_common"), shared)) = {
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supports_all_posix_ai_flags:true,
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has_restricted_stack_args:false,
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has_transactions:true,
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ts_has_dep_problem:false,
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};
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wincapc wincap __attribute__((section (".cygwin_dll_common"), shared));
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@ -419,8 +429,14 @@ wincapc::init ()
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}
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if (has_osversioninfoex && version.wProductType != VER_NT_WORKSTATION)
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((wincaps *)caps)->is_server = true;
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{
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((wincaps *)caps)->is_server = true;
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if (version.dwMajorVersion >= 6
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&& (version.wSuiteMask
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& (VER_SUITE_TERMINAL | VER_SUITE_SINGLEUSERTS))
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== VER_SUITE_TERMINAL)
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((wincaps *)caps)->ts_has_dep_problem = true;
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}
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if (NT_SUCCESS (NtQueryInformationProcess (GetCurrentProcess (),
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ProcessWow64Information,
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&wow64, sizeof wow64, NULL))
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@ -42,6 +42,7 @@ struct wincaps
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unsigned supports_all_posix_ai_flags : 1;
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unsigned has_restricted_stack_args : 1;
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unsigned has_transactions : 1;
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unsigned ts_has_dep_problem : 1;
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};
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class wincapc
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@ -90,6 +91,7 @@ public:
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bool IMPLEMENT (supports_all_posix_ai_flags)
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bool IMPLEMENT (has_restricted_stack_args)
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bool IMPLEMENT (has_transactions)
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bool IMPLEMENT (ts_has_dep_problem)
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#undef IMPLEMENT
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};
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@ -26,7 +26,7 @@ details. */
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#define EXPORT_ALIAS(sym,symalias) extern "C" __typeof (sym) symalias __attribute__ ((alias(#sym)));
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#define WINVER 0x0600
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#define WINVER 0x0601
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#define _NO_W32_PSEUDO_MODIFIERS
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#include <sys/types.h>
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