diff options
Diffstat (limited to 'winsup/cygwin/autoload.cc')
| -rw-r--r-- | winsup/cygwin/autoload.cc | 492 |
1 files changed, 0 insertions, 492 deletions
diff --git a/winsup/cygwin/autoload.cc b/winsup/cygwin/autoload.cc deleted file mode 100644 index 2e495ad6a..000000000 --- a/winsup/cygwin/autoload.cc +++ /dev/null @@ -1,492 +0,0 @@ -/* autoload.cc: all dynamic load stuff. - - Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, - 2009, 2010 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 "miscfuncs.h" -#include "fenv.h" -#define USE_SYS_TYPES_FD_SET -#include <winsock2.h> - -bool NO_COPY wsock_started; - -/* Macro for defining "auto-load" functions. - * Note that this is self-modifying code *gasp*. - * The first invocation of a routine will trigger the loading of - * the DLL. This will then be followed by the discovery of - * the procedure's entry point, which is placed into the location - * pointed to by the stack pointer. This code then changes - * the "call" operand which invoked it to a "jmp" which will - * transfer directly to the DLL function on the next invocation. - * - * Subsequent calls to routines whose transfer address has not been - * determined will skip the "load the dll" step, starting at the - * "discovery of the entry point" step. - * - * So, immediately following the the call to one of the above routines - * we have: - * DLL info (4 bytes) Pointer to a block of information concerning - * the DLL (see below). - * DLL args (4 bytes) The number of arguments pushed on the stack by - * the call. If this is an odd value then this - * is a flag that non-existence of this function - * is not a fatal error - * func name (n bytes) asciz string containing the name of the function - * to be loaded. - * - * The DLL info block consists of the following - * load_state (4 bytes) Pointer to a word containing the routine used - * to eventually invoke the function. Initially - * points to an init function which loads the - * DLL, gets the process's load address, - * changes the contents here to point to the - * function address, and changes the call *(%eax) - * to a jmp func. If the initialization has been - * done, only the load part is done. - * DLL handle (4 bytes) The handle to use when loading the DLL. - * DLL locker (4 bytes) Word to use to avoid multi-thread access during - * initialization. - * extra init (4 bytes) Extra initialization function. - * DLL name (n bytes) asciz string containing the name of the DLL. - */ - -/* LoadDLLprime is used to prime the DLL info information, providing an - additional initialization routine to call prior to calling the first - function. */ -#define LoadDLLprime(dllname, init_also) __asm__ (" \n\ -.ifndef " #dllname "_primed \n\ - .section .data_cygwin_nocopy,\"w\" \n\ - .align 4 \n\ -."#dllname "_info: \n\ - .long _std_dll_init \n\ - .long 0 \n\ - .long -1 \n\ - .long " #init_also " \n\ - .string16 \"" #dllname ".dll\" \n\ - .text \n\ - .set " #dllname "_primed, 1 \n\ -.endif \n\ -"); - -/* Create a "decorated" name */ -#define mangle(name, n) #name "@" #n - -/* Standard DLL load macro. May invoke a fatal error if the function isn't - found. */ -#define LoadDLLfunc(name, n, dllname) \ - LoadDLLfuncEx (name, n, dllname, 0) -#define LoadDLLfuncEx(name, n, dllname, notimp) \ - LoadDLLfuncEx2(name, n, dllname, notimp, 0) -#define LoadDLLfuncEx2(name, n, dllname, notimp, err) \ - LoadDLLfuncEx3(name, n, dllname, notimp, err, 0) - -/* Main DLL setup stuff. */ -#define LoadDLLfuncEx3(name, n, dllname, notimp, err, fn) \ - LoadDLLprime (dllname, dll_func_load) \ - __asm__ (" \n\ - .section ." #dllname "_autoload_text,\"wx\" \n\ - .global _" mangle (name, n) " \n\ - .global _win32_" mangle (name, n) " \n\ - .align 8 \n\ -_" mangle (name, n) ": \n\ -_win32_" mangle (name, n) ": \n\ - .byte 0xe9 \n\ - .long -4 + 1f - . \n\ -1:movl (2f),%eax \n\ - call *(%eax) \n\ -2:.long ." #dllname "_info \n\ - .long (" #n "+" #notimp ") | (((" #err ") & 0xff) <<16) | (((" #fn ") & 0xff) << 24) \n\ - .asciz \"" #name "\" \n\ - .text \n\ -"); - -/* DLL loader helper functions used during initialization. */ - -/* The function which finds the address, given the name and overwrites - the call so that future invocations go straight to the function in - the DLL. */ -extern "C" void dll_func_load () __asm__ ("dll_func_load"); - -/* Called by the primary initialization function "init_std_dll" to - setup the stack and eliminate future calls to init_std_dll for other - functions from this DLL. */ -extern "C" void dll_chain () __asm__ ("dll_chain"); - -extern "C" { - -__asm__ (" \n\ - .text \n\ -msg1: \n\ - .ascii \"couldn't dynamically determine load address for '%s' (handle %p), %E\\0\"\n\ - \n\ - .align 32 \n\ -noload: \n\ - popl %edx # Get the address of the information block\n\ - movl 4(%edx),%eax # Should we 'ignore' the lack \n\ - test $1,%eax # of this function? \n\ - jz 1f # Nope. \n\ - decl %eax # Yes. This is the # of bytes + 1 \n\ - popl %edx # Caller's caller \n\ - addl %eax,%esp # Pop off bytes \n\ - andl $0xffff0000,%eax# upper word \n\ - subl %eax,%esp # adjust for possible return value \n\ - pushl %eax # Save for later \n\ - movl $127,%eax # ERROR_PROC_NOT_FOUND \n\ - pushl %eax # First argument \n\ - call _SetLastError@4 # Set it \n\ - popl %eax # Get back argument \n\ - sarl $16,%eax # return value in high order word \n\ - jmp *%edx # Return \n\ -1: \n\ - movl (%edx),%eax # Handle value \n\ - pushl 4(%eax) \n\ - leal 8(%edx),%eax # Location of name of function \n\ - pushl %eax \n\ - pushl $msg1 # The message \n\ - call ___api_fatal # Print message. Never returns \n\ - \n\ - .globl dll_func_load \n\ -dll_func_load: \n\ - movl (%esp),%eax # 'Return address' contains load info \n\ - addl $8,%eax # Address of name of function to load \n\ - pushl %eax # Second argument \n\ - movl -8(%eax),%eax # Where handle lives \n\ - movl 4(%eax),%eax # Address of Handle to DLL \n\ - pushl %eax # Handle to DLL \n\ - call _GetProcAddress@8# Load it \n\ - test %eax,%eax # Success? \n\ - jne gotit # Yes \n\ - jmp noload # Issue an error or return \n\ -gotit: \n\ - popl %edx # Pointer to 'return address' \n\ - subl %edx,%eax # Make it relative \n\ - addl $7,%eax # Tweak \n\ - subl $12,%edx # Point to jmp \n\ - movl %eax,1(%edx) # Move relative address after jump \n\ - jmp *%edx # Jump to actual function \n\ - \n\ - .global dll_chain \n\ -dll_chain: \n\ - pushl %eax # Restore 'return address' \n\ - jmp *%edx # Jump to next init function \n\ -"); - -/* C representations of the two info blocks described above. - FIXME: These structures confuse gdb for some reason. GDB can print - the whole structure but has problems with the name field? */ -struct dll_info -{ - DWORD load_state; - HANDLE handle; - LONG here; - void (*init) (); - WCHAR name[]; -}; - -struct func_info -{ - struct dll_info *dll; - LONG decoration; - char name[]; -}; - -/* Mechanism for setting up info for passing to dll_chain routines. */ -union retchain -{ - struct {long high; long low;}; - long long ll; -}; - -#define RETRY_COUNT 10 - -/* The standard DLL initialization routine. */ -__attribute__ ((used, noinline)) static long long -std_dll_init () -{ - struct func_info *func = (struct func_info *) __builtin_return_address (0); - struct dll_info *dll = func->dll; - retchain ret; - - if (InterlockedIncrement (&dll->here)) - do - { - InterlockedDecrement (&dll->here); - yield (); - } - while (InterlockedIncrement (&dll->here)); - else if (!dll->handle) - { - fenv_t fpuenv; - fegetenv (&fpuenv); - WCHAR dll_path[MAX_PATH]; - DWORD err = ERROR_SUCCESS; - /* http://www.microsoft.com/technet/security/advisory/2269637.mspx */ - wcpcpy (wcpcpy (dll_path, windows_system_directory), dll->name); - /* MSDN seems to imply that LoadLibrary can fail mysteriously, so, - since there have been reports of this in the mailing list, retry - several times before giving up. */ - for (int i = 1; i <= RETRY_COUNT; i++) - { - /* If loading the library succeeds, just leave the loop. */ - if ((dll->handle = LoadLibraryW (dll_path)) != NULL) - break; - /* Otherwise check error code returned by LoadLibrary. If the - error code is neither NOACCESS nor DLL_INIT_FAILED, break out - of the loop. */ - err = GetLastError (); - if (err != ERROR_NOACCESS && err != ERROR_DLL_INIT_FAILED) - break; - if (i < RETRY_COUNT) - yield (); - } - if (!dll->handle) - { - /* If LoadLibrary with full path returns one of the weird errors - reported on the Cygwin mailing list, retry with only the DLL - name. Checking the error codes allows to restrict loading - with just the DLL name to this specific problem. */ - if ((err == ERROR_NOACCESS || err == ERROR_DLL_INIT_FAILED) - && (dll->handle = LoadLibraryW (dll->name)) != NULL) - ; - else if ((func->decoration & 1)) - dll->handle = INVALID_HANDLE_VALUE; - else - api_fatal ("could not load %W, %E", dll_path); - } - fesetenv (&fpuenv); - } - - /* Set "arguments" for dll_chain. */ - ret.low = (long) dll->init; - ret.high = (long) func; - - InterlockedDecrement (&dll->here); - - /* Kludge alert. Redirects the return address to dll_chain. */ - __asm__ __volatile__ (" \n\ - movl $dll_chain,4(%ebp) \n\ - "); - - return ret.ll; -} - -/* Initialization function for winsock stuff. */ -WSADATA NO_COPY wsadata; -__attribute__ ((used, noinline, regparm(1))) static long long -wsock_init () -{ - static LONG NO_COPY here = -1L; - struct func_info *func = (struct func_info *) __builtin_return_address (0); - struct dll_info *dll = func->dll; - - while (InterlockedIncrement (&here)) - { - InterlockedDecrement (&here); - yield (); - } - - if (!wsock_started) - { - int (*wsastartup) (int, WSADATA *); - - /* Don't use autoload to load WSAStartup to eliminate recursion. */ - wsastartup = (int (*)(int, WSADATA *)) - GetProcAddress ((HMODULE) (dll->handle), "WSAStartup"); - if (wsastartup) - { - int res = wsastartup ((2<<8) | 2, &wsadata); - - debug_printf ("res %d", res); - debug_printf ("wVersion %d", wsadata.wVersion); - debug_printf ("wHighVersion %d", wsadata.wHighVersion); - debug_printf ("szDescription %s", wsadata.szDescription); - debug_printf ("szSystemStatus %s", wsadata.szSystemStatus); - debug_printf ("iMaxSockets %d", wsadata.iMaxSockets); - debug_printf ("iMaxUdpDg %d", wsadata.iMaxUdpDg); - debug_printf ("lpVendorInfo %d", wsadata.lpVendorInfo); - - wsock_started = 1; - } - } - - /* Kludge alert. Redirects the return address to dll_chain. */ - __asm__ __volatile__ (" \n\ - movl $dll_chain,4(%ebp) \n\ - "); - - InterlockedDecrement (&here); - - volatile retchain ret; - /* Set "arguments for dll_chain. */ - ret.low = (long) dll_func_load; - ret.high = (long) func; - return ret.ll; -} - -LoadDLLprime (ws2_32, _wsock_init) - -LoadDLLfuncEx2 (DnsQuery_A, 24, dnsapi, 1, 127) // ERROR_PROC_NOT_FOUND -LoadDLLfuncEx (DnsRecordListFree, 8, dnsapi, 1) - -// 50 = ERROR_NOT_SUPPORTED. Returned if OS doesn't support iphlpapi funcs -LoadDLLfuncEx2 (GetAdaptersAddresses, 20, iphlpapi, 1, 50) -LoadDLLfuncEx2 (GetExtendedTcpTable, 24, iphlpapi, 1, 50) -LoadDLLfunc (GetIfEntry, 4, iphlpapi) -LoadDLLfunc (GetIpAddrTable, 12, iphlpapi) -LoadDLLfunc (GetIpForwardTable, 12, iphlpapi) -LoadDLLfunc (GetNetworkParams, 8, iphlpapi) -LoadDLLfunc (GetTcpTable, 12, iphlpapi) - -LoadDLLfuncEx (AttachConsole, 4, kernel32, 1) -LoadDLLfunc (FindFirstVolumeA, 8, kernel32) -LoadDLLfunc (FindNextVolumeA, 12, kernel32) -LoadDLLfunc (FindVolumeClose, 4, kernel32) -LoadDLLfunc (GetConsoleWindow, 0, kernel32) -LoadDLLfuncEx (GetNamedPipeClientProcessId, 8, kernel32, 1) -LoadDLLfuncEx (GetSystemWindowsDirectoryW, 8, kernel32, 1) -LoadDLLfunc (GetVolumeNameForVolumeMountPointA, 12, kernel32) -LoadDLLfunc (LocaleNameToLCID, 8, kernel32) - -LoadDLLfunc (WNetCloseEnum, 4, mpr) -LoadDLLfunc (WNetEnumResourceA, 16, mpr) -LoadDLLfunc (WNetGetProviderNameA, 12, mpr) -LoadDLLfunc (WNetGetResourceInformationA, 16, mpr) -LoadDLLfunc (WNetOpenEnumA, 20, mpr) - -/* 127 == ERROR_PROC_NOT_FOUND */ -LoadDLLfuncEx2 (DsGetDcNameW, 24, netapi32, 1, 127) -LoadDLLfunc (NetApiBufferFree, 4, netapi32) -LoadDLLfunc (NetGetAnyDCName, 12, netapi32) -LoadDLLfunc (NetGetDCName, 12, netapi32) -LoadDLLfunc (NetUserGetGroups, 28, netapi32) -LoadDLLfunc (NetUserGetInfo, 16, netapi32) -LoadDLLfunc (NetUserGetLocalGroups, 32, netapi32) - -/* 0xc000007a == STATUS_PROCEDURE_NOT_FOUND */ -#define LoadDLLfuncNt(name, n, dllname) \ - LoadDLLfuncEx2(name, n, dllname, 1, 0xc000007a) -LoadDLLfuncNt (NtCommitTransaction, 8, ntdll) -LoadDLLfuncNt (NtCreateTransaction, 40, ntdll) -LoadDLLfuncNt (NtRollbackTransaction, 8, ntdll) -LoadDLLfuncNt (RtlGetCurrentTransaction, 0, ntdll) -LoadDLLfuncNt (RtlSetCurrentTransaction, 4, ntdll) - -LoadDLLfunc (CoTaskMemFree, 4, ole32) - -LoadDLLfuncEx (EnumProcessModules, 16, psapi, 1) -LoadDLLfuncEx (GetModuleFileNameExW, 16, psapi, 1) -LoadDLLfuncEx (GetModuleInformation, 16, psapi, 1) -LoadDLLfuncEx (GetProcessMemoryInfo, 12, psapi, 1) -LoadDLLfuncEx (QueryWorkingSet, 12, psapi, 1) - -LoadDLLfunc (UuidCreate, 4, rpcrt4) -LoadDLLfuncEx (UuidCreateSequential, 4, rpcrt4, 1) - -/* secur32 functions return NTSTATUS values. */ -LoadDLLfuncNt (LsaDeregisterLogonProcess, 4, secur32) -LoadDLLfuncNt (LsaFreeReturnBuffer, 4, secur32) -LoadDLLfuncNt (LsaLogonUser, 56, secur32) -LoadDLLfuncNt (LsaLookupAuthenticationPackage, 12, secur32) -LoadDLLfuncNt (LsaRegisterLogonProcess, 12, secur32) - -LoadDLLfunc (SHGetDesktopFolder, 4, shell32) - -LoadDLLfunc (CharNextExA, 12, user32) -LoadDLLfunc (CloseClipboard, 0, user32) -LoadDLLfunc (CloseDesktop, 4, user32) -LoadDLLfunc (CloseWindowStation, 4, user32) -LoadDLLfunc (CreateDesktopW, 24, user32) -LoadDLLfunc (CreateWindowExA, 48, user32) -LoadDLLfunc (CreateWindowStationW, 16, user32) -LoadDLLfunc (DefWindowProcA, 16, user32) -LoadDLLfunc (DispatchMessageA, 4, user32) -LoadDLLfunc (EmptyClipboard, 0, user32) -LoadDLLfunc (FindWindowA, 8, user32) -LoadDLLfunc (GetClipboardData, 4, user32) -LoadDLLfunc (GetForegroundWindow, 0, user32) -LoadDLLfunc (GetKeyboardLayout, 4, user32) -LoadDLLfunc (GetMessageA, 16, user32) -LoadDLLfunc (GetPriorityClipboardFormat, 8, user32) -LoadDLLfunc (GetProcessWindowStation, 0, user32) -LoadDLLfunc (GetThreadDesktop, 4, user32) -LoadDLLfunc (GetUserObjectInformationW, 20, user32) -LoadDLLfunc (GetWindowThreadProcessId, 8, user32) -LoadDLLfunc (MessageBeep, 4, user32) -LoadDLLfunc (MessageBoxA, 16, user32) -LoadDLLfunc (MsgWaitForMultipleObjectsEx, 20, user32) -LoadDLLfunc (OpenClipboard, 4, user32) -LoadDLLfunc (PeekMessageA, 20, user32) -LoadDLLfunc (PostMessageA, 16, user32) -LoadDLLfunc (PostQuitMessage, 4, user32) -LoadDLLfunc (RegisterClassA, 4, user32) -LoadDLLfunc (RegisterClipboardFormatA, 4, user32) -LoadDLLfunc (SendMessageA, 16, user32) -LoadDLLfunc (SetClipboardData, 8, user32) -LoadDLLfunc (SetParent, 8, user32) -LoadDLLfunc (SetProcessWindowStation, 4, user32) -LoadDLLfunc (SetThreadDesktop, 4, user32) -LoadDLLfunc (ShowWindowAsync, 8, user32) - -LoadDLLfunc (timeBeginPeriod, 4, winmm) -LoadDLLfunc (timeEndPeriod, 4, winmm) -LoadDLLfunc (timeGetDevCaps, 8, winmm) -LoadDLLfunc (timeGetTime, 0, winmm) -LoadDLLfunc (waveInAddBuffer, 12, winmm) -LoadDLLfunc (waveInClose, 4, winmm) -LoadDLLfunc (waveInGetNumDevs, 0, winmm) -LoadDLLfunc (waveInOpen, 24, winmm) -LoadDLLfunc (waveInPrepareHeader, 12, winmm) -LoadDLLfunc (waveInReset, 4, winmm) -LoadDLLfunc (waveInStart, 4, winmm) -LoadDLLfunc (waveInUnprepareHeader, 12, winmm) -LoadDLLfunc (waveOutClose, 4, winmm) -LoadDLLfunc (waveOutGetNumDevs, 0, winmm) -LoadDLLfunc (waveOutGetVolume, 8, winmm) -LoadDLLfunc (waveOutOpen, 24, winmm) -LoadDLLfunc (waveOutPrepareHeader, 12, winmm) -LoadDLLfunc (waveOutReset, 4, winmm) -LoadDLLfunc (waveOutSetVolume, 8, winmm) -LoadDLLfunc (waveOutUnprepareHeader, 12, winmm) -LoadDLLfunc (waveOutWrite, 12, winmm) - -LoadDLLfunc (accept, 12, ws2_32) -LoadDLLfunc (bind, 12, ws2_32) -LoadDLLfunc (closesocket, 4, ws2_32) -LoadDLLfunc (connect, 12, ws2_32) -LoadDLLfunc (gethostbyaddr, 12, ws2_32) -LoadDLLfunc (gethostbyname, 4, ws2_32) -LoadDLLfunc (gethostname, 8, ws2_32) -LoadDLLfunc (getpeername, 12, ws2_32) -LoadDLLfunc (getprotobyname, 4, ws2_32) -LoadDLLfunc (getprotobynumber, 4, ws2_32) -LoadDLLfunc (getservbyname, 8, ws2_32) -LoadDLLfunc (getservbyport, 8, ws2_32) -LoadDLLfunc (getsockname, 12, ws2_32) -LoadDLLfunc (getsockopt, 20, ws2_32) -LoadDLLfunc (ioctlsocket, 12, ws2_32) -LoadDLLfunc (listen, 8, ws2_32) -LoadDLLfunc (setsockopt, 20, ws2_32) -LoadDLLfunc (shutdown, 8, ws2_32) -LoadDLLfunc (socket, 12, ws2_32) -LoadDLLfunc (WSAAsyncSelect, 16, ws2_32) -LoadDLLfunc (WSADuplicateSocketW, 12, ws2_32) -LoadDLLfunc (WSAEnumNetworkEvents, 12, ws2_32) -LoadDLLfunc (WSAEventSelect, 12, ws2_32) -LoadDLLfunc (WSAGetLastError, 0, ws2_32) -LoadDLLfunc (WSAIoctl, 36, ws2_32) -LoadDLLfunc (WSARecv, 28, ws2_32) -LoadDLLfunc (WSARecvFrom, 36, ws2_32) -LoadDLLfunc (WSASendMsg, 24, ws2_32) -LoadDLLfunc (WSASendTo, 36, ws2_32) -LoadDLLfunc (WSASetLastError, 4, ws2_32) -LoadDLLfunc (WSASocketW, 24, ws2_32) -// LoadDLLfunc (WSAStartup, 8, ws2_32) -LoadDLLfunc (WSAWaitForMultipleEvents, 20, ws2_32) -} |