env_windowsUserModeWin8_1.c File Reference

#include <windows.h>
#include "symcrypt.h"
#include "sc_lib.h"

Include dependency graph for env_windowsUserModeWin8_1.c:

Go to the source code of this file.

Functions
SYMCRYPT_CPU_FEATURES SYMCRYPT_CALL	SymCryptCpuFeaturesNeverPresentEnvWindowsUsermodeWin8_1nLater ()
VOID SYMCRYPT_CALL	SymCryptInitEnvWindowsUsermodeWin8_1nLater (UINT32 version)
_Analysis_noreturn_ VOID SYMCRYPT_CALL	SymCryptFatalEnvWindowsUsermodeWin8_1nLater (UINT32 fatalCode)
VOID SYMCRYPT_CALL	SymCryptTestInjectErrorEnvWindowsUsermodeWin8_1nLater (PBYTE pbBuf, SIZE_T cbBuf)

Function Documentation

SymCryptCpuFeaturesNeverPresentEnvWindowsUsermodeWin8_1nLater()

SYMCRYPT_CPU_FEATURES SYMCRYPT_CALL SymCryptCpuFeaturesNeverPresentEnvWindowsUsermodeWin8_1nLater

(

)

Definition at line 17 of file env_windowsUserModeWin8_1.c.

{
    return 0;
}

SymCryptFatalEnvWindowsUsermodeWin8_1nLater()

_Analysis_noreturn_ VOID SYMCRYPT_CALL SymCryptFatalEnvWindowsUsermodeWin8_1nLater

(

UINT32

fatalCode

)

Definition at line 75 of file env_windowsUserModeWin8_1.c.

{
    UINT32 fatalCodeVar;
 
    SymCryptFatalIntercept( fatalCode );
 
    //
    // Put the fatal code in a location where it shows up in the dump
    //
    SYMCRYPT_FORCE_WRITE32( &fatalCodeVar, fatalCode );
 
    //
    // Our first preference is to fastfail,
    // the second to create an AV, which triggers a Watson report so that we get to
    // see what is going wrong.
    //
    __fastfail( FAST_FAIL_CRYPTO_LIBRARY );
 
    //
    // Next we write to the NULL pointer, this causes an AV
    //
    SYMCRYPT_FORCE_WRITE32( (volatile UINT32 *)NULL, fatalCode );
 
    //
    // If that fails, we terminate the process. (This function call also ensures that this environment is actually
    // used in user mode and not some other environment.)
    // (During testing we had the TerminateProcess as the first option, but that makes debugging very hard as
    // it leaves no traces of what went wrong.)
    //
    TerminateProcess( GetCurrentProcess(), fatalCode );
 
    SymCryptFatalHang( fatalCode );
}

SymCryptInitEnvWindowsUsermodeWin8_1nLater()

VOID SYMCRYPT_CALL SymCryptInitEnvWindowsUsermodeWin8_1nLater

(

UINT32

version

)

Definition at line 24 of file env_windowsUserModeWin8_1.c.

{
    if( g_SymCryptFlags & SYMCRYPT_FLAG_LIB_INITIALIZED )
    {
        return;
    }
 
#if SYMCRYPT_CPU_X86 | SYMCRYPT_CPU_AMD64
    //
    // First we detect what the CPU has
    //
    SymCryptDetectCpuFeaturesByCpuid( SYMCRYPT_CPUID_DETECT_FLAG_CHECK_OS_SUPPORT_FOR_YMM );
 
    //
    // We also need to be sure that the OS supports the extended registers.
    //
    {
        ULONGLONG FeatureMask = GetEnabledXStateFeatures();
 
        if( !(FeatureMask & XSTATE_MASK_AVX) )
        {
            g_SymCryptCpuFeaturesNotPresent |= SYMCRYPT_CPU_FEATURE_AVX2;
        }
 
        if( !(FeatureMask & XSTATE_MASK_AVX512) )
        {
            g_SymCryptCpuFeaturesNotPresent |= SYMCRYPT_CPU_FEATURE_AVX512;
        }
    }
 
    //
    // Our SaveXmm function never fails because it doesn't have to do anything in User mode.
    //
    g_SymCryptCpuFeaturesNotPresent &= ~SYMCRYPT_CPU_FEATURE_SAVEXMM_NOFAIL;
 
#elif SYMCRYPT_CPU_ARM
 
    g_SymCryptCpuFeaturesNotPresent = (SYMCRYPT_CPU_FEATURES) ~SYMCRYPT_CPU_FEATURE_NEON;
 
#elif SYMCRYPT_CPU_ARM64
 
    SymCryptDetectCpuFeaturesFromIsProcessorFeaturePresent();
 
#endif
 
    SymCryptInitEnvCommon( version );
}

SymCryptTestInjectErrorEnvWindowsUsermodeWin8_1nLater()

VOID SYMCRYPT_CALL SymCryptTestInjectErrorEnvWindowsUsermodeWin8_1nLater	(	PBYTE	pbBuf,
		SIZE_T	cbBuf
	)

Definition at line 168 of file env_windowsUserModeWin8_1.c.

{
    //
    // This feature is only used during testing. In production it is always
    // an empty function that the compiler can optimize away.
    //
    UNREFERENCED_PARAMETER( pbBuf );
    UNREFERENCED_PARAMETER( cbBuf );
}