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Initialisation of debugging and floating point registers in
PsBeginThread*. svn path=/trunk/; revision=3504
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guido
parent
2b22998369
commit
c9aa7a8462
4 changed files with 62 additions and 35 deletions
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@ -20,7 +20,9 @@
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#ifndef __NTOSKRNL_INCLUDE_INTERNAL_I386_FPU_H
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#define __NTOSKRNL_INCLUDE_INTERNAL_I386_FPU_H
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VOID
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extern ULONG HardwareMathSupport;
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VOID
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KiCheckFPU(VOID);
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#endif /* __NTOSKRNL_INCLUDE_INTERNAL_I386_FPU_H */
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@ -16,7 +16,7 @@
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* $Id: bthread.S,v 1.5 2002/09/08 10:23:29 chorns Exp $
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/* $Id: bthread.S,v 1.6 2002/09/15 13:49:57 guido Exp $
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*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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@ -38,10 +38,10 @@
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*
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*/
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.globl _PsBeginThreadWithContextInternal
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.globl _PsBeginThreadWithContextInternal
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.globl _PsBeginThread
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_PsBeginThread:
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_PsBeginThread:
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/*
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* This isn't really a function, we are called as the return address
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* of the context switch function
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@ -52,6 +52,25 @@ _PsBeginThread:
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*/
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call _PiBeforeBeginThread
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/*
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* Initialize debugging registers
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*/
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movl $0, %eax /* set to 0 */
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movl %eax, %dr0
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movl %eax, %dr1
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movl %eax, %dr2
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movl %eax, %dr3
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movl %eax, %dr6
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movl %eax, %dr7
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/*
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* Initialize floating point registers
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*/
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movl (_HardwareMathSupport), %eax
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jz nofpu
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fninit
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nofpu:
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/*
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* Call the actual start of the thread
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*/
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@ -74,41 +93,51 @@ _PsBeginThread:
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pushl $0
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call _KeBugCheck@4
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addl $4, %esp
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/*
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* And if that fails then loop
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*/
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.1:
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jmp .1
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_PsBeginThreadWithContextInternal:
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/*
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* This isn't really a function, we are called as the return
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* address of a context switch
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*/
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/*
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* Do the necessary prolog before the context switch
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*/
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*/
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call _PiBeforeBeginThread
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/* FIXME: Don't ignore the debugging registers. */
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popl %eax /* Dr0 */
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popl %eax /* Dr1 */
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popl %eax /* Dr2 */
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popl %eax /* Dr3 */
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popl %eax /* Dr6 */
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popl %eax /* Dr7 */
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/* FIXME: Don't ignore the floating point registers. */
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addl $112,%esp /* FloatSave */
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/*
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* Load the debugging registers
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*/
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popl %eax /* Dr0 */
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movl %eax, %dr0
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popl %eax /* Dr1 */
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movl %eax, %dr1
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popl %eax /* Dr2 */
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movl %eax, %dr2
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popl %eax /* Dr3 */
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movl %eax, %dr3
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popl %eax /* Dr6 */
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movl %eax, %dr6
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popl %eax /* Dr7 */
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movl %eax, %dr7
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/*
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* Load the floating point registers
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*/
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movl (_HardwareMathSupport), %eax
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jz nofpu2
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frstor 0(%esp)
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nofpu2:
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addl $4, %esp
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/* Load the rest of the thread's user mode context. */
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movl $0,%eax
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movl $0, %eax
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jmp KeReturnFromSystemCallWithHook
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@ -37,7 +37,7 @@
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/* GLOBALS *******************************************************************/
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static ULONG HardwareMathSupport;
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ULONG HardwareMathSupport;
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/* FUNCTIONS *****************************************************************/
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@ -103,8 +103,8 @@ Ke386InitThreadWithContext(PKTHREAD Thread, PCONTEXT Context)
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/*
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* Setup a stack frame for exit from the task switching routine
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*/
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InitSize = 5 * sizeof(DWORD) + 6 * sizeof(DWORD) +
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InitSize = 5 * sizeof(DWORD) + 6 * sizeof(DWORD) +
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sizeof(FLOATING_SAVE_AREA) + sizeof(KTRAP_FRAME);
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KernelStack = (PULONG)(Thread->KernelStack - InitSize);
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@ -124,12 +124,10 @@ Ke386InitThreadWithContext(PKTHREAD Thread, PCONTEXT Context)
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KernelStack[10] = Context->Dr7;
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/* Set up the initial floating point state. */
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memcpy((PVOID)&KernelStack[11], (PVOID)&Context->FloatSave,
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sizeof(FLOATING_SAVE_AREA));
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KernelStack[11] = (ULONG)&Context->FloatSave;
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/* Set up a trap frame from the context. */
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TrapFrame = (PKTRAP_FRAME)
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((PBYTE)KernelStack + 11 * sizeof(DWORD) + sizeof(FLOATING_SAVE_AREA));
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TrapFrame = (PKTRAP_FRAME)((PBYTE)KernelStack + 12 * sizeof(DWORD));
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TrapFrame->DebugEbp = (PVOID)Context->Ebp;
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TrapFrame->DebugEip = (PVOID)Context->Eip;
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TrapFrame->DebugArgMark = 0;
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@ -163,8 +161,8 @@ Ke386InitThreadWithContext(PKTHREAD Thread, PCONTEXT Context)
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}
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NTSTATUS
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Ke386InitThread(PKTHREAD Thread,
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PKSTART_ROUTINE StartRoutine,
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Ke386InitThread(PKTHREAD Thread,
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PKSTART_ROUTINE StartRoutine,
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PVOID StartContext)
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/*
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* Initialize a thread
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@ -177,8 +175,6 @@ Ke386InitThread(PKTHREAD Thread,
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*/
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KernelStack = (PULONG)(Thread->KernelStack - (8*4));
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/* FIXME: Add initial floating point information */
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/* FIXME: Add initial debugging information */
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KernelStack[0] = 0; /* EDI */
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KernelStack[1] = 0; /* ESI */
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KernelStack[2] = 0; /* EBX */
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