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ntdll: Use syscall frame for FPU and XMM contexts in NtSetContextThread. 

Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Jacek Caban 2021-03-01 16:52:15 +01:00 committed by Alexandre Julliard
parent e5d671bee5
commit 6e03330a21
1 changed files with 54 additions and 19 deletions
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73
dlls/ntdll/unix/signal_i386.c
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@ -770,23 +770,6 @@ static inline void restore_fpu( const CONTEXT *context )
}
/***********************************************************************
* restore_fpux
*
* Restore the FPU extended context
*/
static inline void restore_fpux( const CONTEXT *context )
{
/* we have to enforce alignment by hand */
char buffer[sizeof(XSAVE_FORMAT) + 16];
XSAVE_FORMAT *state = (XSAVE_FORMAT *)(((ULONG_PTR)buffer + 15) & ~15);
memcpy( state, context->ExtendedRegisters, sizeof(*state) );
/* reset the current interrupt status */
state->StatusWord &= state->ControlWord | 0xff80;
__asm__ __volatile__( "fxrstor %0" : : "m" (*state) );
}
/***********************************************************************
* restore_xstate
*
@ -867,6 +850,32 @@ static void fpux_to_fpu( FLOATING_SAVE_AREA *fpu, const XSAVE_FORMAT *fpux )
}
/***********************************************************************
* fpu_to_fpux
*
* Fill extended FPU context from standard one.
*/
static void fpu_to_fpux( XSAVE_FORMAT *fpux, const FLOATING_SAVE_AREA *fpu )
{
unsigned int i;
fpux->ControlWord = fpu->ControlWord;
fpux->StatusWord = fpu->StatusWord;
fpux->ErrorOffset = fpu->ErrorOffset;
fpux->ErrorSelector = fpu->ErrorSelector;
fpux->ErrorOpcode = fpu->ErrorSelector >> 16;
fpux->DataOffset = fpu->DataOffset;
fpux->DataSelector = fpu->DataSelector;
fpux->TagWord = 0;
for (i = 0; i < 8; i++)
{
if (((fpu->TagWord >> (i * 2)) & 3) != 3)
fpux->TagWord |= 1 << i;
memcpy( &fpux->FloatRegisters[i], &fpu->RegisterArea[10 * i], 10 );
}
}
/***********************************************************************
* save_context
*
@ -1041,6 +1050,16 @@ __ASM_GLOBAL_FUNC( set_full_cpu_context,
*/
void signal_restore_full_cpu_context(void)
{
struct syscall_xsave *xsave = get_syscall_xsave( get_syscall_frame() );
if (cpu_info.FeatureSet & CPU_FEATURE_FXSR)
{
__asm__ volatile( "fxrstor %0" : : "m"(xsave->u.xsave) );
}
else
{
__asm__ volatile( "frstor %0; fwait" : : "m" (xsave->u.fsave) );
}
set_full_cpu_context();
}
@ -1272,8 +1291,24 @@ NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
frame->fs = context->SegFs;
frame->gs = context->SegGs;
}
if (flags & CONTEXT_EXTENDED_REGISTERS) restore_fpux( context );
else if (flags & CONTEXT_FLOATING_POINT) restore_fpu( context );
if (flags & CONTEXT_EXTENDED_REGISTERS)
{
struct syscall_xsave *xsave = get_syscall_xsave( frame );
memcpy( &xsave->u.xsave, context->ExtendedRegisters, sizeof(xsave->u.xsave) );
/* reset the current interrupt status */
xsave->u.xsave.StatusWord &= xsave->u.xsave.ControlWord | 0xff80;
}
else if (flags & CONTEXT_FLOATING_POINT)
{
if (cpu_info.FeatureSet & CPU_FEATURE_FXSR)
{
fpu_to_fpux( &get_syscall_xsave( frame )->u.xsave, &context->FloatSave );
}
else
{
get_syscall_xsave( frame )->u.fsave = context->FloatSave;
}
}
restore_xstate( context );