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changed syscall tables. now it mimics NT style.

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it has a SSDT a SSPT, a KeServiceDescriptorTable and a
KeServiceDescriptorTableShadow. modified the code
inside the int2e_handler() to use the new syscall tables.

svn path=/trunk/; revision=959
This commit is contained in:
Hernan Ochoa 2000-01-23 15:17:06 +00:00
parent 65a742ceaa
commit 55bb357489
1 changed files with 54 additions and 30 deletions
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84
reactos/ntoskrnl/ke/i386/usercall.c
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@ -1,4 +1,4 @@
/* $Id: usercall.c,v 1.4 1999/12/18 17:48:22 dwelch Exp $
/* $Id: usercall.c,v 1.5 2000/01/23 15:17:06 hochoa Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -24,6 +24,9 @@
extern SERVICE_TABLE _SystemServiceTable[];
extern KE_SERVICE_DESCRIPTOR_TABLE_ENTRY KeServiceDescriptorTable;
extern KE_SERVICE_DESCRIPTOR_TABLE_ENTRY KeServiceDescriptorTableShadow[];
/* The service dispatcher will take the service number passed in
* by the user mode process, logical and it with ServiceNumberMask
* and compare the resulting value with ServiceNumberValue. If the
@ -43,14 +46,14 @@ static KSPIN_LOCK DispatchTableLock = {0,};
static DWORD DispatchTableCount = 0;
static HAL_DISPATCH_TABLE_ENTRY DispatchTables[16];
NTSTATUS HalRegisterServiceTable(DWORD Mask,
DWORD Value,
NTSTATUS HalRegisterServiceTable(DWORD Mask,
DWORD Value,
PSERVICE_TABLE Table,
DWORD Count)
{
NTSTATUS Status;
KIRQL OldLvl;
KeAcquireSpinLock(&DispatchTableLock, &OldLvl);
Status = STATUS_SUCCESS;
@ -61,7 +64,7 @@ NTSTATUS HalRegisterServiceTable(DWORD Mask,
DispatchTables[DispatchTableCount].ServiceTable = Table;
DispatchTables[DispatchTableCount].TableCount = Count;
DispatchTableCount++;
KeReleaseSpinLock(&DispatchTableLock, OldLvl);
return Status;
@ -104,9 +107,9 @@ VOID KiSystemCallHook(ULONG Nr, ...)
#ifdef TRACE_SYSTEM_CALLS
va_list ap;
ULONG i;
va_start(ap, Nr);
DbgPrint("%x/%d ", _SystemServiceTable[Nr].Function,Nr);
DbgPrint("%x (", _SystemServiceTable[Nr].ParametersSize);
for (i = 0; i < _SystemServiceTable[Nr].ParametersSize / 4; i++)
@ -129,80 +132,101 @@ ULONG KiAfterSystemCallHook(ULONG NtStatus, PCONTEXT Context)
return(NtStatus);
}
// This function should be used by win32k.sys to add its own user32/gdi32 services
// SSDTIndex is 0 based
// SyscallsCountTable its not used at the moment
NTSTATUS KeAddSystemServiceTable( int SSDTindex, PSSDT pSSDT, PSSPT pSSPT, ULONG* SyscallsCountTable )
{
// TODO: We could improve these checks to see if the pointers point to valid memory and so on...
// but we're in kernel mode, this function can get called only from kernel mode, so, why bother?
if(pSSDT == NULL || pSSPT == NULL || SSDTindex != 1)
return STATUS_UNSUCCESSFUL;
// We update the KeServiceDescriptorTableShadow
KeServiceDescriptorTableShadow[SSDTindex].pSSDT = pSSDT;
KeServiceDescriptorTableShadow[SSDTindex].pSSPT = pSSPT;
return STATUS_SUCCESS;
}
void interrupt_handler2e(void);
__asm__("\n\t.global _interrupt_handler2e\n\t"
"_interrupt_handler2e:\n\t"
/* Save the user context */
"pushl %ebp\n\t" /* Ebp */
"pushl %eax\n\t" /* Eax */
"pushl %ecx\n\t" /* Ecx */
"pushl %edx\n\t" /* Edx */
"pushl %ebx\n\t" /* Ebx */
"pushl %esi\n\t" /* Esi */
"pushl %edi\n\t" /* Edi */
"pushl %ds\n\t" /* SegDs */
"pushl %es\n\t" /* SegEs */
"pushl %fs\n\t" /* SegFs */
"pushl %gs\n\t" /* SegGs */
"subl $112,%esp\n\t" /* FloatSave */
"pushl $0\n\t" /* Dr7 */
"pushl $0\n\t" /* Dr6 */
"pushl $0\n\t" /* Dr3 */
"pushl $0\n\t" /* Dr2 */
"pushl $0\n\t" /* Dr1 */
"pushl $0\n\t" /* Dr0 */
"pushl $0\n\t" /* ContextFlags */
/* Set ES to kernel segment */
"movw $"STR(KERNEL_DS)",%bx\n\t"
"movw %bx,%es\n\t"
/* Save pointer to user context as argument to system call */
"pushl %esp\n\t"
/* Allocate new Kernel stack frame */
"movl %esp,%ebp\n\t"
/* Users's current stack frame pointer is source */
"movl %edx,%esi\n\t"
/* FIXME: determine system service table to use */
/* FIXME: chech to see if SS is valid/inrange */
/* Allocate room for argument list from kernel stack */
"movl %es:__SystemServiceTable(,%eax,8),%ecx\n\t"
"movl %es:_MainSSPT(,%eax,4), %ecx\n\t"
//"movl %es:__SystemServiceTable(,%eax,8),%ecx\n\t"
"subl %ecx,%esp\n\t"
/* Copy the arguments from the user stack to the kernel stack */
"movl %esp,%edi\n\t"
"rep\n\tmovsb\n\t"
/* DS is now also kernel segment */
"movw %bx,%ds\n\t"
/* Call system call hook */
"pushl %eax\n\t"
"call _KiSystemCallHook\n\t"
"popl %eax\n\t"
/* Make the system service call */
"movl %ds:__SystemServiceTable+4(,%eax,8),%eax\n\t"
//"movl %ds:__SystemServiceTable+4(,%eax,8),%eax\n\t"
"movl %ds:_MainSSDT(,%eax,4),%eax\n\t"
"call *%eax\n\t"
/* Deallocate the kernel stack frame */
"movl %ebp,%esp\n\t"
/* Call the post system call hook and deliver any pending APCs */
"pushl %eax\n\t"
"call _KiAfterSystemCallHook\n\t"
"addl $8,%esp\n\t"
/* Restore the user context */
"addl $4,%esp\n\t" /* UserContext */
"addl $24,%esp\n\t" /* Dr[0-3,6-7] */
@ -211,15 +235,15 @@ void interrupt_handler2e(void);
"popl %fs\n\t" /* SegFs */
"popl %es\n\t" /* SegEs */
"popl %ds\n\t" /* SegDs */
"popl %edi\n\t" /* Edi */
"popl %esi\n\t" /* Esi */
"popl %ebx\n\t" /* Ebx */
"popl %edx\n\t" /* Edx */
"popl %ecx\n\t" /* Ecx */
"addl $4,%esp\n\t" /* Eax (Not restored) */
"popl %ebp\n\t" /* Ebp */
"iret\n\t");