* Copyright (c) 2006 Martin Mares <mj@ucw.cz>
* Copyright (c) 2021 Pali Rohár <pali@kernel.org>
*
- * Can be freely distributed and used under the terms of the GNU GPL.
+ * Can be freely distributed and used under the terms of the GNU GPL v2+
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <io.h>
* function conflicts with some MSVC intrinsic.
* MSVC supports inline assembly via __asm keyword in 32-bit mode only.
* GCC version 4.9.0 and higher provides __builtin_ia32_readeflags_uXX()
- * builtin for XX-mode.
+ * builtin for XX-mode. This builtin is also available as __readeflags()
+ * function indirectly via <x86intrin.h> header file.
*/
#if defined(_MSC_VER) && (_MSC_VER >= 1500 || (_MSC_VER >= 1400 && defined(__BUILDMACHINE__)))
#pragma intrinsic(__readeflags)
#elif defined(__GNUC__) && ((__GNUC__ == 4 && __GNUC_MINOR__ >= 9) || (__GNUC__ > 4))
-#ifdef __x86_64__
-#define __readeflags() __builtin_ia32_readeflags_u64()
-#else
-#define __readeflags() __builtin_ia32_readeflags_u32()
-#endif
+#include <x86intrin.h>
#elif defined(_MSC_VER) && defined(_M_IX86)
static inline unsigned int
__readeflags(void)
*/
if (!LookupPrivilegeValue(NULL, SE_TCB_NAME, &luid_tcb_privilege))
- goto err_not_implemented;
+ goto err_privilege_not_held;
/*
* If the current thread has already Tcb privilege enabled then there
/* On NT-based systems issue ProcessUserModeIOPL syscall which changes IOPL to 3. */
if (!SetProcessUserModeIOPL())
{
- a->warning("NT ProcessUserModeIOPL call failed with error: %lu.", (unsigned long int)GetLastError());
+ DWORD error = GetLastError();
+ a->debug("NT ProcessUserModeIOPL call failed: %s.", error == ERROR_INVALID_FUNCTION ? "Not Implemented" : error == ERROR_PRIVILEGE_NOT_HELD ? "Access Denied" : "Operation Failed");
return 0;
}