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Initialisation of debugging and floating point registers in

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PsBeginThread*.

svn path=/trunk/; revision=3504
This commit is contained in:
guido 2002-09-15 13:49:57 +00:00
parent 2b22998369
commit c9aa7a8462
4 changed files with 62 additions and 35 deletions
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2
reactos/ntoskrnl/include/internal/i386/fpu.h
View file

@ -20,6 +20,8 @@
#ifndef __NTOSKRNL_INCLUDE_INTERNAL_I386_FPU_H #ifndef __NTOSKRNL_INCLUDE_INTERNAL_I386_FPU_H
#define __NTOSKRNL_INCLUDE_INTERNAL_I386_FPU_H #define __NTOSKRNL_INCLUDE_INTERNAL_I386_FPU_H
extern ULONG HardwareMathSupport;
VOID VOID
KiCheckFPU(VOID); KiCheckFPU(VOID);

45
reactos/ntoskrnl/ke/i386/bthread.S
View file

@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software * along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/ */
/* $Id: bthread.S,v 1.5 2002/09/08 10:23:29 chorns Exp $ /* $Id: bthread.S,v 1.6 2002/09/15 13:49:57 guido Exp $
* *
* COPYRIGHT: See COPYING in the top level directory * COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel * PROJECT: ReactOS kernel
@ -52,6 +52,25 @@ _PsBeginThread:
*/ */
call _PiBeforeBeginThread call _PiBeforeBeginThread
/*
* Initialize debugging registers
*/
movl $0, %eax /* set to 0 */
movl %eax, %dr0
movl %eax, %dr1
movl %eax, %dr2
movl %eax, %dr3
movl %eax, %dr6
movl %eax, %dr7
/*
* Initialize floating point registers
*/
movl (_HardwareMathSupport), %eax
jz nofpu
fninit
nofpu:
/* /*
* Call the actual start of the thread * Call the actual start of the thread
*/ */
@ -93,22 +112,32 @@ _PsBeginThreadWithContextInternal:
*/ */
call _PiBeforeBeginThread call _PiBeforeBeginThread
/* FIXME: Don't ignore the debugging registers. */ /*
* Load the debugging registers
*/
popl %eax /* Dr0 */ popl %eax /* Dr0 */
movl %eax, %dr0
popl %eax /* Dr1 */ popl %eax /* Dr1 */
movl %eax, %dr1
popl %eax /* Dr2 */ popl %eax /* Dr2 */
movl %eax, %dr2
popl %eax /* Dr3 */ popl %eax /* Dr3 */
movl %eax, %dr3
popl %eax /* Dr6 */ popl %eax /* Dr6 */
movl %eax, %dr6
popl %eax /* Dr7 */ popl %eax /* Dr7 */
movl %eax, %dr7
/* FIXME: Don't ignore the floating point registers. */ /*
addl $112,%esp /* FloatSave */ * Load the floating point registers
*/
movl (_HardwareMathSupport), %eax
jz nofpu2
frstor 0(%esp)
nofpu2:
addl $4, %esp
/* Load the rest of the thread's user mode context. */ /* Load the rest of the thread's user mode context. */
movl $0, %eax movl $0, %eax
jmp KeReturnFromSystemCallWithHook jmp KeReturnFromSystemCallWithHook

2
reactos/ntoskrnl/ke/i386/fpu.c
View file

@ -37,7 +37,7 @@
/* GLOBALS *******************************************************************/ /* GLOBALS *******************************************************************/
static ULONG HardwareMathSupport; ULONG HardwareMathSupport;
/* FUNCTIONS *****************************************************************/ /* FUNCTIONS *****************************************************************/

8
reactos/ntoskrnl/ke/i386/thread.c
View file

@ -124,12 +124,10 @@ Ke386InitThreadWithContext(PKTHREAD Thread, PCONTEXT Context)
KernelStack[10] = Context->Dr7; KernelStack[10] = Context->Dr7;
/* Set up the initial floating point state. */ /* Set up the initial floating point state. */
memcpy((PVOID)&KernelStack[11], (PVOID)&Context->FloatSave, KernelStack[11] = (ULONG)&Context->FloatSave;
sizeof(FLOATING_SAVE_AREA));
/* Set up a trap frame from the context. */ /* Set up a trap frame from the context. */
TrapFrame = (PKTRAP_FRAME) TrapFrame = (PKTRAP_FRAME)((PBYTE)KernelStack + 12 * sizeof(DWORD));
((PBYTE)KernelStack + 11 * sizeof(DWORD) + sizeof(FLOATING_SAVE_AREA));
TrapFrame->DebugEbp = (PVOID)Context->Ebp; TrapFrame->DebugEbp = (PVOID)Context->Ebp;
TrapFrame->DebugEip = (PVOID)Context->Eip; TrapFrame->DebugEip = (PVOID)Context->Eip;
TrapFrame->DebugArgMark = 0; TrapFrame->DebugArgMark = 0;
@ -177,8 +175,6 @@ Ke386InitThread(PKTHREAD Thread,
*/ */
KernelStack = (PULONG)(Thread->KernelStack - (8*4)); KernelStack = (PULONG)(Thread->KernelStack - (8*4));
/* FIXME: Add initial floating point information */
/* FIXME: Add initial debugging information */
KernelStack[0] = 0; /* EDI */ KernelStack[0] = 0; /* EDI */
KernelStack[1] = 0; /* ESI */ KernelStack[1] = 0; /* ESI */
KernelStack[2] = 0; /* EBX */ KernelStack[2] = 0; /* EBX */