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newlib-cygwin/winsup/utils/loadlib.h

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* loadlib.h: New header implementing safe LoadLibrary calls. Include throughout files using LoadLibrary function. * cygcheck.cc (dump_sysinfo): Retrieve kernel32.dll handle via GetModuleHandle, rather than using LoadLibrary. * cygpath.cc (get_long_name): Ditto. (do_sysfolders): Append .dll suffix in LoadLibrary call. * ldh.cc (WinMain): Use LoadLibraryExW with DONT_RESOLVE_DLL_REFERENCES to avoid loading malicious library code. * locale.cc (print_locale_with_codeset): Change way to retrieve kernel32.dll path.
2010-08-28 19:22:37 +08:00
/* loadlib.h
* cygcheck.cc (handle_unique_object_name): Avoid a compiler warning. (dump_sysinfo): Ditto. * loadlib.h (_load_sys_library): Mark as used, to avoid a compiler warning. * path.cc (oopt): Gurad with !FSTAB_ONLY to avoid a compiler warning. (read_flags): Ditto.
2011-03-29 19:02:58 +08:00
Copyright 2010, 2011 Red Hat, Inc.
* loadlib.h: New header implementing safe LoadLibrary calls. Include throughout files using LoadLibrary function. * cygcheck.cc (dump_sysinfo): Retrieve kernel32.dll handle via GetModuleHandle, rather than using LoadLibrary. * cygpath.cc (get_long_name): Ditto. (do_sysfolders): Append .dll suffix in LoadLibrary call. * ldh.cc (WinMain): Use LoadLibraryExW with DONT_RESOLVE_DLL_REFERENCES to avoid loading malicious library code. * locale.cc (print_locale_with_codeset): Change way to retrieve kernel32.dll path.
2010-08-28 19:22:37 +08:00
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. */
#ifndef _LOADLIB_H
#define _LOADLIB_H
#include <windows.h>
#include <wchar.h>
/* Load all system libs from the windows system directory by prepending the
full path. This doesn't work for loadling cygwin1.dll. For this case,
instead of prepending the path, make sure that the CWD is removed from
the DLL search path, if possible (XP SP1++, Vista++). */
* cygcheck.cc (handle_unique_object_name): Avoid a compiler warning. (dump_sysinfo): Ditto. * loadlib.h (_load_sys_library): Mark as used, to avoid a compiler warning. * path.cc (oopt): Gurad with !FSTAB_ONLY to avoid a compiler warning. (read_flags): Ditto.
2011-03-29 19:02:58 +08:00
static HMODULE _load_sys_library (const wchar_t *dll) __attribute__ ((used));
* loadlib.h: New header implementing safe LoadLibrary calls. Include throughout files using LoadLibrary function. * cygcheck.cc (dump_sysinfo): Retrieve kernel32.dll handle via GetModuleHandle, rather than using LoadLibrary. * cygpath.cc (get_long_name): Ditto. (do_sysfolders): Append .dll suffix in LoadLibrary call. * ldh.cc (WinMain): Use LoadLibraryExW with DONT_RESOLVE_DLL_REFERENCES to avoid loading malicious library code. * locale.cc (print_locale_with_codeset): Change way to retrieve kernel32.dll path.
2010-08-28 19:22:37 +08:00
static HMODULE
_load_sys_library (const wchar_t *dll)
{
static BOOL (*set_dll_directory)(LPCWSTR);
static WCHAR sysdir[MAX_PATH];
static UINT sysdir_len;
WCHAR dllpath[MAX_PATH];
if (!sysdir_len)
{
sysdir_len = GetSystemDirectoryW (sysdir, MAX_PATH);
sysdir[sysdir_len++] = L'\\';
sysdir[sysdir_len] = L'\0';
}
if (!set_dll_directory)
{
HMODULE k32 = GetModuleHandleW (L"kernel32.dll");
if (k32)
set_dll_directory = (BOOL (*)(LPCWSTR))
GetProcAddress (k32, "SetDllDirectoryW");
if (!set_dll_directory)
set_dll_directory = (BOOL (*)(LPCWSTR)) -1;
else
set_dll_directory (L"");
}
if (wcscmp (dll, L"cygwin1.dll") == 0)
return LoadLibraryExW (L"cygwin1.dll", NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
wcscpy (dllpath, sysdir);
wcscpy (dllpath + sysdir_len, dll);
return LoadLibraryExW (dllpath, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
}
#define LoadLibraryW(d) _load_sys_library(d)
#define LoadLibraryA(d) _load_sys_library(L##d)
#endif /* _LOADLIB_H */