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- Do the real memory allocation in context of CSRSS process. Suggested by David Welch.

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svn path=/trunk/; revision=8599
This commit is contained in:
Filip Navara 2004-03-08 21:45:39 +00:00
parent 70acaf22e8
commit dbce1b766d
1 changed files with 68 additions and 46 deletions
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114
reactos/drivers/video/videoprt/int10.c
View file

@ -18,12 +18,45 @@
* If not, write to the Free Software Foundation,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Id: int10.c,v 1.3 2004/03/06 01:22:02 navaraf Exp $
* $Id: int10.c,v 1.4 2004/03/08 21:45:39 navaraf Exp $
*/
#include "videoprt.h"
#include "internal/v86m.h"
VOID FASTCALL
IntAttachToCSRSS(PEPROCESS *CallingProcess, PEPROCESS *PrevAttachedProcess)
{
*CallingProcess = PsGetCurrentProcess();
if (*CallingProcess != Csrss)
{
if (NULL != PsGetCurrentThread()->OldProcess)
{
*PrevAttachedProcess = *CallingProcess;
KeDetachProcess();
}
else
{
*PrevAttachedProcess = NULL;
}
KeAttachProcess(Csrss);
}
}
VOID FASTCALL
IntDetachFromCSRSS(PEPROCESS *CallingProcess, PEPROCESS *PrevAttachedProcess)
{
if (*CallingProcess != Csrss)
{
KeDetachProcess();
if (NULL != *PrevAttachedProcess)
{
KeAttachProcess(*PrevAttachedProcess);
}
}
}
/*
* @implemented
*/
@ -40,20 +73,7 @@ VideoPortInt10(
DPRINT("VideoPortInt10\n");
CallingProcess = PsGetCurrentProcess();
if (CallingProcess != Csrss)
{
if (NULL != PsGetCurrentThread()->OldProcess)
{
PrevAttachedProcess = CallingProcess;
KeDetachProcess();
}
else
{
PrevAttachedProcess = NULL;
}
KeAttachProcess(Csrss);
}
IntAttachToCSRSS(&CallingProcess, &PrevAttachedProcess);
memset(&Regs, 0, sizeof(Regs));
DPRINT("- Input register Eax: %x\n", BiosArguments->Eax);
@ -72,14 +92,7 @@ VideoPortInt10(
Regs.Ebp = BiosArguments->Ebp;
Status = Ke386CallBios(0x10, &Regs);
if (CallingProcess != Csrss)
{
KeDetachProcess();
if (NULL != PrevAttachedProcess)
{
KeAttachProcess(PrevAttachedProcess);
}
}
IntDetachFromCSRSS(&CallingProcess, &PrevAttachedProcess);
return Status;
}
@ -93,9 +106,13 @@ IntInt10AllocateBuffer(
{
PVOID MemoryAddress;
NTSTATUS Status;
PEPROCESS CallingProcess;
PEPROCESS PrevAttachedProcess;
DPRINT("IntInt10AllocateBuffer\n");
IntAttachToCSRSS(&CallingProcess, &PrevAttachedProcess);
MemoryAddress = (PVOID)0x20000;
Status = ZwAllocateVirtualMemory(NtCurrentProcess(), &MemoryAddress, 0,
Length, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
@ -119,6 +136,8 @@ IntInt10AllocateBuffer(
DPRINT("- Offset: %x\n", (ULONG)MemoryAddress & 0xFF);
DPRINT("- Length: %x\n", *Length);
IntDetachFromCSRSS(&CallingProcess, &PrevAttachedProcess);
return STATUS_SUCCESS;
}
@ -129,11 +148,20 @@ IntInt10FreeBuffer(
IN USHORT Off)
{
PVOID MemoryAddress = (PVOID)((Seg << 4) + Off);
NTSTATUS Status;
PEPROCESS CallingProcess;
PEPROCESS PrevAttachedProcess;
DPRINT("IntInt10FreeBuffer\n");
DPRINT("- Segment: %x\n", Seg);
DPRINT("- Offset: %x\n", Off);
return ZwFreeVirtualMemory(NtCurrentProcess(), &MemoryAddress, 0,
IntAttachToCSRSS(&CallingProcess, &PrevAttachedProcess);
Status = ZwFreeVirtualMemory(NtCurrentProcess(), &MemoryAddress, 0,
MEM_RELEASE);
IntDetachFromCSRSS(&CallingProcess, &PrevAttachedProcess);
return Status;
}
VP_STATUS STDCALL
@ -144,12 +172,19 @@ IntInt10ReadMemory(
OUT PVOID Buffer,
IN ULONG Length)
{
PEPROCESS CallingProcess;
PEPROCESS PrevAttachedProcess;
DPRINT("IntInt10ReadMemory\n");
DPRINT("- Segment: %x\n", Seg);
DPRINT("- Offset: %x\n", Off);
DPRINT("- Buffer: %x\n", Buffer);
DPRINT("- Length: %x\n", Length);
IntAttachToCSRSS(&CallingProcess, &PrevAttachedProcess);
RtlCopyMemory(Buffer, (PVOID)((Seg << 4) + Off), Length);
IntDetachFromCSRSS(&CallingProcess, &PrevAttachedProcess);
return STATUS_SUCCESS;
}
@ -161,12 +196,19 @@ IntInt10WriteMemory(
IN PVOID Buffer,
IN ULONG Length)
{
PEPROCESS CallingProcess;
PEPROCESS PrevAttachedProcess;
DPRINT("IntInt10WriteMemory\n");
DPRINT("- Segment: %x\n", Seg);
DPRINT("- Offset: %x\n", Off);
DPRINT("- Buffer: %x\n", Buffer);
DPRINT("- Length: %x\n", Length);
IntAttachToCSRSS(&CallingProcess, &PrevAttachedProcess);
RtlCopyMemory((PVOID)((Seg << 4) + Off), Buffer, Length);
IntDetachFromCSRSS(&CallingProcess, &PrevAttachedProcess);
return STATUS_SUCCESS;
}
@ -182,20 +224,7 @@ IntInt10CallBios(
DPRINT("IntInt10CallBios\n");
CallingProcess = PsGetCurrentProcess();
if (CallingProcess != Csrss)
{
if (NULL != PsGetCurrentThread()->OldProcess)
{
PrevAttachedProcess = CallingProcess;
KeDetachProcess();
}
else
{
PrevAttachedProcess = NULL;
}
KeAttachProcess(Csrss);
}
IntAttachToCSRSS(&CallingProcess, &PrevAttachedProcess);
memset(&Regs, 0, sizeof(Regs));
DPRINT("- Input register Eax: %x\n", BiosArguments->Eax);
@ -227,14 +256,7 @@ IntInt10CallBios(
BiosArguments->SegDs = Regs.Ds;
BiosArguments->SegEs = Regs.Es;
if (CallingProcess != Csrss)
{
KeDetachProcess();
if (NULL != PrevAttachedProcess)
{
KeAttachProcess(PrevAttachedProcess);
}
}
IntDetachFromCSRSS(&CallingProcess, &PrevAttachedProcess);
return Status;
}