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

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 16:51:48 +01:00 committed by Alexandre Julliard
parent ce5f17c892
commit e5d671bee5
1 changed files with 19 additions and 19 deletions
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38
dlls/ntdll/unix/signal_i386.c
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@ -530,6 +530,11 @@ void set_syscall_frame(void *frame)
x86_thread_data()->syscall_frame = frame;
}
static struct syscall_xsave *get_syscall_xsave( struct syscall_frame *frame )
{
return (struct syscall_xsave *)((ULONG_PTR)((struct syscall_xsave *)frame - 1) & ~63);
}
static inline WORD get_cs(void) { WORD res; __asm__( "movw %%cs,%0" : "=r" (res) ); return res; }
static inline WORD get_ds(void) { WORD res; __asm__( "movw %%ds,%0" : "=r" (res) ); return res; }
static inline WORD get_fs(void) { WORD res; __asm__( "movw %%fs,%0" : "=r" (res) ); return res; }
@ -701,23 +706,6 @@ static inline void save_fpu( CONTEXT *context )
}
/***********************************************************************
* save_fpux
*
* Save the thread FPU extended context.
*/
static inline void save_fpux( 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);
context->ContextFlags |= CONTEXT_EXTENDED_REGISTERS;
__asm__ __volatile__( "fxsave %0" : "=m" (*state) );
memcpy( context->ExtendedRegisters, state, sizeof(*state) );
}
/***********************************************************************
* save_xstate
*
@ -1328,6 +1316,7 @@ NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
if (self)
{
struct syscall_xsave *xsave = get_syscall_xsave( frame );
if (needed_flags & CONTEXT_INTEGER)
{
context->Eax = frame->eax;
@ -1356,8 +1345,19 @@ NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
context->SegGs = frame->gs;
context->ContextFlags |= CONTEXT_SEGMENTS;
}
if (needed_flags & CONTEXT_FLOATING_POINT) save_fpu( context );
if (needed_flags & CONTEXT_EXTENDED_REGISTERS) save_fpux( context );
if (needed_flags & CONTEXT_FLOATING_POINT)
{
if (cpu_info.FeatureSet & CPU_FEATURE_FXSR)
fpux_to_fpu( &context->FloatSave, &xsave->u.xsave );
else
context->FloatSave = xsave->u.fsave;
context->ContextFlags |= CONTEXT_FLOATING_POINT;
}
if (needed_flags & CONTEXT_EXTENDED_REGISTERS)
{
memcpy( context->ExtendedRegisters, &xsave->u.xsave, sizeof(xsave->u.xsave) );
context->ContextFlags |= CONTEXT_EXTENDED_REGISTERS;
}
/* update the cached version of the debug registers */
if (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_i386))
{