diff options
Diffstat (limited to 'winsup/cygwin/init.cc')
| -rw-r--r-- | winsup/cygwin/init.cc | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/winsup/cygwin/init.cc b/winsup/cygwin/init.cc deleted file mode 100644 index 52e2df7e1..000000000 --- a/winsup/cygwin/init.cc +++ /dev/null @@ -1,158 +0,0 @@ -/* init.cc - - Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, - 2006, 2007, 2008, 2009 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#include "winsup.h" -#include "cygtls.h" -#include "ntdll.h" -#include "shared_info.h" - -static DWORD _my_oldfunc; - -static char NO_COPY *search_for = (char *) cygthread::stub; -unsigned threadfunc_ix[8] __attribute__((section (".cygwin_dll_common"), shared)); -extern cygthread *hwait_sig; - -#define OLDFUNC_OFFSET -1 - -static void WINAPI -threadfunc_fe (VOID *arg) -{ - (void)__builtin_return_address(1); - asm volatile ("andl $-16,%%esp" ::: "%esp"); - _cygtls::call ((DWORD (*) (void *, void *)) TlsGetValue (_my_oldfunc), arg); -} - -/* If possible, redirect the thread entry point to a cygwin routine which - adds tls stuff to the stack. */ -static void -munge_threadfunc () -{ - int i; - char **ebp = (char **) __builtin_frame_address (0); - if (!threadfunc_ix[0]) - { - char **peb; - char **top = (char **) _tlsbase; - for (peb = ebp, i = 0; peb < top && i < 7; peb++) - if (*peb == search_for) - threadfunc_ix[i++] = peb - ebp; - if (0 && !threadfunc_ix[0]) - { - try_to_debug (); - return; - } - } - - if (threadfunc_ix[0]) - { - char *threadfunc = ebp[threadfunc_ix[0]]; - if (!search_for || threadfunc == search_for) - { - search_for = NULL; - for (i = 0; threadfunc_ix[i]; i++) - ebp[threadfunc_ix[i]] = (char *) threadfunc_fe; - TlsSetValue (_my_oldfunc, threadfunc); - } - } -} - -inline static void -respawn_wow64_process () -{ - NTSTATUS ret; - PROCESS_BASIC_INFORMATION pbi; - HANDLE parent; - - ULONG wow64 = TRUE; /* Opt on the safe side. */ - - /* Unfortunately there's no simpler way to retrieve the - parent process in NT, as far as I know. Hints welcome. */ - ret = NtQueryInformationProcess (GetCurrentProcess (), - ProcessBasicInformation, - &pbi, sizeof pbi, NULL); - if (NT_SUCCESS (ret) - && (parent = OpenProcess (PROCESS_QUERY_INFORMATION, - FALSE, - pbi.InheritedFromUniqueProcessId))) - { - NtQueryInformationProcess (parent, ProcessWow64Information, - &wow64, sizeof wow64, NULL); - CloseHandle (parent); - } - - /* The parent is a real 64 bit process? Respawn! */ - if (!wow64) - { - PROCESS_INFORMATION pi; - STARTUPINFOW si; - DWORD ret = 0; - - GetStartupInfoW (&si); - if (!CreateProcessW (NULL, GetCommandLineW (), NULL, NULL, TRUE, - CREATE_DEFAULT_ERROR_MODE - | GetPriorityClass (GetCurrentProcess ()), - NULL, NULL, &si, &pi)) - api_fatal ("Failed to create process <%s>, %E", GetCommandLineA ()); - CloseHandle (pi.hThread); - if (WaitForSingleObject (pi.hProcess, INFINITE) == WAIT_FAILED) - api_fatal ("Waiting for process %d failed, %E", pi.dwProcessId); - GetExitCodeProcess (pi.hProcess, &ret); - CloseHandle (pi.hProcess); - ExitProcess (ret); - } -} - -extern void __stdcall dll_crt0_0 (); - -extern "C" BOOL WINAPI -dll_entry (HANDLE h, DWORD reason, void *static_load) -{ - BOOL wow64_test_stack_marker; - - switch (reason) - { - case DLL_PROCESS_ATTACH: - wincap.init (); - init_console_handler (false); - - cygwin_hmodule = (HMODULE) h; - dynamically_loaded = (static_load == NULL); - - /* Is the stack at an unusual address? This is, an address which - is in the usual space occupied by the process image, but below - the auto load address of DLLs? - Check if we're running in WOW64 on a 64 bit machine *and* are - spawned by a genuine 64 bit process. If so, respawn. */ - if (wincap.is_wow64 () - && &wow64_test_stack_marker >= (PBOOL) 0x400000 - && &wow64_test_stack_marker <= (PBOOL) 0x10000000) - respawn_wow64_process (); - - dll_crt0_0 (); - _my_oldfunc = TlsAlloc (); - break; - case DLL_PROCESS_DETACH: - if (dynamically_loaded) - shared_destroy (); - break; - case DLL_THREAD_ATTACH: - if (hwait_sig) - munge_threadfunc (); - break; - case DLL_THREAD_DETACH: - if (hwait_sig && (void *) &_my_tls > (void *) &wow64_test_stack_marker - && _my_tls.isinitialized ()) - _my_tls.remove (0); - break; - } - - return TRUE; -} |