mirror of
https://github.com/shadps4-emu/ext-cryptopp.git
synced 2024-11-23 09:59:42 +00:00
6028a6921a
I thought this was due to trying to call the darn instruction even though g_hasDARN == false on Power8. However, the problem turned out to be a Power9 load was used when DARN class threw a DARN_Err.
131 lines
3.8 KiB
C++
131 lines
3.8 KiB
C++
// ppc_power9.cpp - written and placed in the public domain by
|
|
// Jeffrey Walton, Uri Blumenthal and Marcel Raad.
|
|
//
|
|
// This source file uses intrinsics and built-ins to gain access to
|
|
// Power9 instructions. A separate source file is needed because
|
|
// additional CXXFLAGS are required to enable the appropriate
|
|
// instructions sets in some build configurations.
|
|
|
|
#include "pch.h"
|
|
#include "config.h"
|
|
|
|
#ifdef CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY
|
|
# include <signal.h>
|
|
# include <setjmp.h>
|
|
#endif
|
|
|
|
#if defined(_ARCH_PWR9)
|
|
# include "ppc_simd.h"
|
|
#endif
|
|
|
|
// Squash MS LNK4221 and libtool warnings
|
|
extern const char PPC_POWER9_FNAME[] = __FILE__;
|
|
|
|
NAMESPACE_BEGIN(CryptoPP)
|
|
|
|
// ************************* Feature Probes ************************* //
|
|
|
|
#ifdef CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY
|
|
extern "C" {
|
|
typedef void (*SigHandler)(int);
|
|
|
|
static jmp_buf s_jmpSIGILL;
|
|
static void SigIllHandler(int)
|
|
{
|
|
longjmp(s_jmpSIGILL, 1);
|
|
}
|
|
}
|
|
#endif // CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY
|
|
|
|
#if (CRYPTOPP_BOOL_PPC32 || CRYPTOPP_BOOL_PPC64)
|
|
|
|
bool CPU_ProbePower9()
|
|
{
|
|
#if defined(CRYPTOPP_NO_CPU_FEATURE_PROBES)
|
|
return false;
|
|
#elif defined(CRYPTOPP_POWER9_AVAILABLE)
|
|
# if defined(CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY)
|
|
// longjmp and clobber warnings. Volatile is required.
|
|
// http://github.com/weidai11/cryptopp/issues/24 and http://stackoverflow.com/q/7721954
|
|
volatile int result = true;
|
|
|
|
volatile SigHandler oldHandler = signal(SIGILL, SigIllHandler);
|
|
if (oldHandler == SIG_ERR)
|
|
return false;
|
|
|
|
volatile sigset_t oldMask;
|
|
if (sigprocmask(0, NULLPTR, (sigset_t*)&oldMask))
|
|
return false;
|
|
|
|
if (setjmp(s_jmpSIGILL))
|
|
result = false;
|
|
else
|
|
{
|
|
// This is "darn r3, 0". It provides a conditioned 32-bit
|
|
// word. It is available on both 32-bit and 64-bit.
|
|
#if CRYPTOPP_BIG_ENDIAN
|
|
__asm__ __volatile__ (".byte 0x7c, 0x60, 0x05, 0xe6 \n" : : : "r3");
|
|
#else
|
|
__asm__ __volatile__ (".byte 0xe6, 0x05, 0x60, 0x7c \n" : : : "r3");
|
|
#endif
|
|
result = true;
|
|
}
|
|
|
|
sigprocmask(SIG_SETMASK, (sigset_t*)&oldMask, NULLPTR);
|
|
signal(SIGILL, oldHandler);
|
|
return result;
|
|
# endif
|
|
#else
|
|
return false;
|
|
#endif // _ARCH_PWR9
|
|
}
|
|
|
|
// The DARN probe is not guarded with a preprocessor macro at the moment. We
|
|
// don't use CRYPTOPP_POWER9_AVAILABLE because old compilers, like GCC 4.8 on
|
|
// CentOS 7, will report NO even though we can produce the random numbers.
|
|
// Other Power9 implementations which use builtins will use the preprocessor
|
|
// macro guard. This strategy also gets into a situation where Power9 is not
|
|
// available but DARN is.
|
|
bool CPU_ProbeDARN()
|
|
{
|
|
#if defined(CRYPTOPP_NO_CPU_FEATURE_PROBES)
|
|
return false;
|
|
#else
|
|
# if defined(CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY)
|
|
// longjmp and clobber warnings. Volatile is required.
|
|
// http://github.com/weidai11/cryptopp/issues/24 and http://stackoverflow.com/q/7721954
|
|
volatile int result = true;
|
|
|
|
volatile SigHandler oldHandler = signal(SIGILL, SigIllHandler);
|
|
if (oldHandler == SIG_ERR)
|
|
return false;
|
|
|
|
volatile sigset_t oldMask;
|
|
if (sigprocmask(0, NULLPTR, (sigset_t*)&oldMask))
|
|
return false;
|
|
|
|
if (setjmp(s_jmpSIGILL))
|
|
result = false;
|
|
else
|
|
{
|
|
// This is "darn r3, 0". It provides a conditioned 32-bit
|
|
// word. It is available on both 32-bit and 64-bit.
|
|
#if CRYPTOPP_BIG_ENDIAN
|
|
__asm__ __volatile__ (".byte 0x7c, 0x60, 0x05, 0xe6 \n" : : : "r3");
|
|
#else
|
|
__asm__ __volatile__ (".byte 0xe6, 0x05, 0x60, 0x7c \n" : : : "r3");
|
|
#endif
|
|
result = true;
|
|
}
|
|
|
|
sigprocmask(SIG_SETMASK, (sigset_t*)&oldMask, NULLPTR);
|
|
signal(SIGILL, oldHandler);
|
|
return result;
|
|
# endif
|
|
#endif // DARN
|
|
}
|
|
|
|
#endif // PPC32 or PPC64
|
|
|
|
NAMESPACE_END
|