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ntdll: Reserve space for the whole 64-bit YMM context in struct x86_thread_data. 

Fixes a regression introduced by 308a5e7c4d.

This was previously broken, but happened to work until the aforementioned
commit put the YMM state right at the end of a page.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=51262
Signed-off-by: Zebediah Figura <z.figura12@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Zebediah Figura 2021-06-12 02:11:33 -05:00 committed by Alexandre Julliard
parent fd9a521c61
commit 79c102d6be
1 changed files with 16 additions and 37 deletions
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53
dlls/ntdll/unix/signal_i386.c
View File

@ -461,24 +461,6 @@ enum i386_trap_code
#endif
};
struct syscall_xsave
{
union
{
XSAVE_FORMAT xsave;
FLOATING_SAVE_AREA fsave;
} u;
struct
{
ULONG64 mask;
ULONG64 compaction_mask;
ULONG64 reserved[6];
M128A ymm_high[8];
} xstate;
};
C_ASSERT( sizeof(struct syscall_xsave) == 0x2c0 );
struct syscall_frame
{
DWORD restore_flags; /* 000 */
@ -504,16 +486,13 @@ struct syscall_frame
XSAVE_FORMAT xsave;
FLOATING_SAVE_AREA fsave;
} u;
struct /* 240 */
{
ULONG64 mask;
ULONG64 compaction_mask;
ULONG64 reserved[6];
M128A ymm_high[8];
} xstate;
/* Leave space for the whole set of YMM registers. They're not used in
* 32-bit mode, but some processors fault if they're not in writable memory.
*/
XSTATE xstate; /* 240 */
};
C_ASSERT( sizeof(struct syscall_frame) == 0x300 );
C_ASSERT( sizeof(struct syscall_frame) == 0x380 );
struct x86_thread_data
{
@ -1011,7 +990,7 @@ NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
memcpy( &frame->u.xsave, context->ExtendedRegisters, sizeof(frame->u.xsave) );
/* reset the current interrupt status */
frame->u.xsave.StatusWord &= frame->u.xsave.ControlWord | 0xff80;
frame->xstate.mask |= XSTATE_MASK_LEGACY;
frame->xstate.Mask |= XSTATE_MASK_LEGACY;
}
else if (flags & CONTEXT_FLOATING_POINT)
{
@ -1023,7 +1002,7 @@ NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
{
frame->u.fsave = context->FloatSave;
}
frame->xstate.mask |= XSTATE_MASK_LEGACY_FLOATING_POINT;
frame->xstate.Mask |= XSTATE_MASK_LEGACY_FLOATING_POINT;
}
if (flags & CONTEXT_XSTATE)
{
@ -1032,10 +1011,10 @@ NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
if (xs->Mask & XSTATE_MASK_GSSE)
{
frame->xstate.mask |= XSTATE_MASK_GSSE;
memcpy( &frame->xstate.ymm_high, &xs->YmmContext, sizeof(frame->xstate.ymm_high) );
frame->xstate.Mask |= XSTATE_MASK_GSSE;
frame->xstate.YmmContext = xs->YmmContext;
}
else frame->xstate.mask &= ~XSTATE_MASK_GSSE;
else frame->xstate.Mask &= ~XSTATE_MASK_GSSE;
}
frame->restore_flags |= flags & ~CONTEXT_INTEGER;
@ -1104,7 +1083,7 @@ NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
context->FloatSave = frame->u.fsave;
}
else if (!xstate_compaction_enabled ||
(frame->xstate.mask & XSTATE_MASK_LEGACY_FLOATING_POINT))
(frame->xstate.Mask & XSTATE_MASK_LEGACY_FLOATING_POINT))
{
fpux_to_fpu( &context->FloatSave, &frame->u.xsave );
}
@ -1120,7 +1099,7 @@ NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
XSAVE_FORMAT *xs = (XSAVE_FORMAT *)context->ExtendedRegisters;
if (!xstate_compaction_enabled ||
(frame->xstate.mask & XSTATE_MASK_LEGACY_FLOATING_POINT))
(frame->xstate.Mask & XSTATE_MASK_LEGACY_FLOATING_POINT))
{
memcpy( xs, &frame->u.xsave, FIELD_OFFSET( XSAVE_FORMAT, MxCsr ));
memcpy( xs->FloatRegisters, frame->u.xsave.FloatRegisters,
@ -1133,7 +1112,7 @@ NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
xs->ControlWord = 0x37f;
}
if (!xstate_compaction_enabled || (frame->xstate.mask & XSTATE_MASK_LEGACY_SSE))
if (!xstate_compaction_enabled || (frame->xstate.Mask & XSTATE_MASK_LEGACY_SSE))
{
memcpy( xs->XmmRegisters, frame->u.xsave.XmmRegisters, sizeof( xs->XmmRegisters ));
xs->MxCsr = frame->u.xsave.MxCsr;
@ -1168,7 +1147,7 @@ NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
return STATUS_INVALID_PARAMETER;
mask = (xstate_compaction_enabled ? xstate->CompactionMask : xstate->Mask) & XSTATE_MASK_GSSE;
xstate->Mask = frame->xstate.mask & mask;
xstate->Mask = frame->xstate.Mask & mask;
xstate->CompactionMask = xstate_compaction_enabled ? (0x8000000000000000 | mask) : 0;
memset( xstate->Reserved, 0, sizeof(xstate->Reserved) );
if (xstate->Mask)
@ -1176,7 +1155,7 @@ NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
if (context_ex->XState.Length < sizeof(XSTATE))
return STATUS_BUFFER_OVERFLOW;
memcpy( &xstate->YmmContext, frame->xstate.ymm_high, sizeof(frame->xstate.ymm_high) );
xstate->YmmContext = frame->xstate.YmmContext;
}
}
}
@ -2401,7 +2380,7 @@ __ASM_GLOBAL_FUNC( signal_start_thread,
/* set syscall frame */
"cmpl $0,%fs:0x1f8\n\t" /* x86_thread_data()->syscall_frame */
"jnz 1f\n\t"
"leal -0x300(%esp),%eax\n\t" /* sizeof(struct syscall_frame) */
"leal -0x380(%esp),%eax\n\t" /* sizeof(struct syscall_frame) */
"andl $~63,%eax\n\t"
"movl %eax,%fs:0x1f8\n" /* x86_thread_data()->syscall_frame */
/* switch to thread stack */