#include <internal/i386/asmmacro.S>
.intel_syntax noprefix
+#define Running 2
+#define WrDispatchInt 0x1F
+
/* GLOBALS *******************************************************************/
+.data
.globl _KiIdt
_KiIdt:
/* This is the Software Interrupt Table that we handle in this file: */
_UnexpectedMsg:
.asciz "\n\x7\x7!!! Unexpected Interrupt %02lx !!!\n"
-Broken:
- .asciz "\n\x7\x7!!! Broken TrapFrame. Magic: %08lx MagicB: %08lx!!!\n"
+_UnhandledMsg:
+ .asciz "\n\x7\x7!!! Unhandled or Unexpected Code at line: %lx!!!\n"
+
+_KiTrapPrefixTable:
+ .byte 0xF2 /* REP */
+ .byte 0xF3 /* REP INS/OUTS */
+ .byte 0x67 /* ADDR */
+ .byte 0xF0 /* LOCK */
+ .byte 0x66 /* OP */
+ .byte 0x2E /* SEG */
+ .byte 0x3E /* DS */
+ .byte 0x26 /* ES */
+ .byte 0x64 /* FS */
+ .byte 0x65 /* GS */
+ .byte 0x36 /* SS */
+
+_KiTrapIoTable:
+ .byte 0xE4 /* IN */
+ .byte 0xE5 /* IN */
+ .byte 0xEC /* IN */
+ .byte 0xED /* IN */
+ .byte 0x6C /* INS */
+ .byte 0x6D /* INS */
+ .byte 0xE6 /* OUT */
+ .byte 0xE7 /* OUT */
+ .byte 0xEE /* OUT */
+ .byte 0xEF /* OUT */
+ .byte 0x6E /* OUTS */
+ .byte 0x6F /* OUTS */
/* SOFTWARE INTERRUPT SERVICES ***********************************************/
+.text
_KiGetTickCount:
_KiCallbackReturn:
_KiRaiseAssertion:
- int 3
+ /* FIXME: TODO */
+ UNHANDLED_PATH
.func KiSystemService
+Dr_kss: DR_TRAP_FIXUP
_KiSystemService:
/* Enter the shared system call prolog */
- SYSCALL_PROLOG
+ SYSCALL_PROLOG kss
/* Jump to the actual handler */
jmp SharedCode
.endfunc
.func KiFastCallEntry
+Dr_FastCallDrSave: DR_TRAP_FIXUP
_KiFastCallEntry:
- /* Set FS to PCR */
- mov ecx, KGDT_R0_PCR
- mov fs, cx
-
- /* Set DS/ES to User Selector */
- mov ecx, KGDT_R3_DATA | RPL_MASK
- mov ds, cx
- mov es, cx
-
- /* Set the current stack to Kernel Stack */
- mov ecx, [fs:KPCR_TSS]
- mov esp, ss:[ecx+KTSS_ESP0]
-
- /* Set up a fake INT Stack. */
- push KGDT_R3_DATA + RPL_MASK
- push edx /* Ring 3 SS:ESP */
- pushf /* Ring 3 EFLAGS */
- push 2 /* Ring 0 EFLAGS */
- add edx, 8 /* Skip user parameter list */
- popf /* Set our EFLAGS */
- or dword ptr [esp], EFLAGS_INTERRUPT_MASK /* Re-enable IRQs in EFLAGS, to fake INT */
- push KGDT_R3_CODE + RPL_MASK
- push KUSER_SHARED_SYSCALL_RET
-
- /* Setup the Trap Frame stack */
- push 0
- push ebp
- push ebx
- push esi
- push edi
- push KGDT_R3_TEB + RPL_MASK
-
- /* Save pointer to our PCR */
- mov ebx, [fs:KPCR_SELF]
-
- /* Get a pointer to the current thread */
- mov esi, [ebx+KPCR_CURRENT_THREAD]
-
- /* Set the exception handler chain terminator */
- push [ebx+KPCR_EXCEPTION_LIST]
- mov dword ptr [ebx+KPCR_EXCEPTION_LIST], -1
-
- /* Use the thread's stack */
- mov ebp, [esi+KTHREAD_INITIAL_STACK]
-
- /* Push previous mode */
- push UserMode
-
- /* Skip the other registers */
- sub esp, 0x48
-
- /* Make space for us on the stack */
- sub ebp, 0x29C
-
- /* Write the previous mode */
- mov byte ptr [esi+KTHREAD_PREVIOUS_MODE], UserMode
-
- /* Sanity check */
- cmp ebp, esp
- jnz BadStack
-
- /* Flush DR7 */
- and dword ptr [ebp+KTRAP_FRAME_DR7], 0
-
- /* Check if the thread was being debugged */
- test byte ptr [esi+KTHREAD_DEBUG_ACTIVE], 0xFF
-
- /* Set the thread's trap frame */
- mov [esi+KTHREAD_TRAP_FRAME], ebp
-
- /* Save DR registers if needed */
- //jnz Dr_FastCallDrSave
-
- /* Set the trap frame debug header */
- SET_TF_DEBUG_HEADER
-
- /* Enable interrupts */
- sti
+ /* Enter the fast system call prolog */
+ FASTCALL_PROLOG FastCallDrSave
SharedCode:
/* Check if we should flush the User Batch */
xor ebx, ebx
+ReadBatch:
or ebx, [ecx+TEB_GDI_BATCH_COUNT]
jz NotWin32K
iret
AbiosExit:
- /* Not yet supported */
- int 3
+ /* FIXME: TODO */
+ UNHANDLED_PATH
.func KiDebugService
+Dr_kids: DR_TRAP_FIXUP
+V86_kids: V86_TRAP_FIXUP
_KiDebugService:
/* Push error code */
push 0
/* Enter trap */
- TRAP_PROLOG(kids)
+ TRAP_PROLOG kids
/* Increase EIP so we skip the INT3 */
//inc dword ptr [ebp+KTRAP_FRAME_EIP]
/* Call debug service dispatcher */
mov eax, [ebp+KTRAP_FRAME_EAX]
mov ecx, [ebp+KTRAP_FRAME_ECX]
- mov edx, [ebp+KTRAP_FRAME_EAX]
+ mov edx, [ebp+KTRAP_FRAME_EDX]
/* Check for V86 mode */
test dword ptr [ebp+KTRAP_FRAME_EFLAGS], EFLAGS_V86_MASK
mov [esp+EXCEPTION_RECORD_NUMBER_PARAMETERS], ecx
/* Check parameter count */
- cmp eax, 0
+ cmp ecx, 0
jz NoParams
/* Get information */
SetPreviousMode:
- /* Calculate the previous mode */
+ /* Get the caller's CS */
mov eax, [ebp+KTRAP_FRAME_CS]
+
MaskMode:
+ /* Check if it was user-mode or kernel-mode */
and eax, MODE_MASK
/* Dispatch the exception */
/* HARDWARE TRAP HANDLERS ****************************************************/
+.func KiFixupFrame
+_KiFixupFrame:
+
+ /* TODO: Routine to fixup a KTRAP_FRAME when faulting from a syscall. */
+ UNHANDLED_PATH
+.endfunc
+
.func KiTrap0
+Dr_kit0: DR_TRAP_FIXUP
+V86_kit0: V86_TRAP_FIXUP
_KiTrap0:
/* Push error code */
push 0
/* Enter trap */
- TRAP_PROLOG(0)
+ TRAP_PROLOG kit0
/* Check for V86 */
test dword ptr [ebp+KTRAP_FRAME_EFLAGS], EFLAGS_V86_MASK
/* We don't support this yet! */
V86Int0:
- int 3
+ /* FIXME: TODO */
+ UNHANDLED_PATH
.endfunc
.func KiTrap1
+Dr_kit1: DR_TRAP_FIXUP
+V86_kit1: V86_TRAP_FIXUP
_KiTrap1:
/* Push error code */
push 0
/* Enter trap */
- TRAP_PROLOG(1)
+ TRAP_PROLOG kit1
/* Check for V86 */
test dword ptr [ebp+KTRAP_FRAME_EFLAGS], EFLAGS_V86_MASK
jz EnableInterrupts
/* We don't support VDM! */
- int 3
+ UNHANDLED_PATH
.endfunc
.globl _KiTrap2
.endfunc
.func KiTrap3
+Dr_kit3: DR_TRAP_FIXUP
+V86_kit3: V86_TRAP_FIXUP
_KiTrap3:
/* Push error code */
push 0
/* Enter trap */
- TRAP_PROLOG(3)
+ TRAP_PROLOG kit3
/* Check for V86 */
test dword ptr [ebp+KTRAP_FRAME_EFLAGS], EFLAGS_V86_MASK
/* Setup EIP, NTSTATUS and parameter count, then dispatch */
mov ebx, [ebp+KTRAP_FRAME_EIP]
dec ebx
- mov eax, STATUS_BREAKPOINT
mov ecx, 3
+ mov eax, STATUS_BREAKPOINT
call _CommonDispatchException
V86Int3:
jz EnableInterrupts3
/* We don't support VDM! */
- int 3
+ UNHANDLED_PATH
.endfunc
.func KiTrap4
+Dr_kit4: DR_TRAP_FIXUP
+V86_kit4: V86_TRAP_FIXUP
_KiTrap4:
/* Push error code */
push 0
/* Enter trap */
- TRAP_PROLOG(4)
+ TRAP_PROLOG kit4
/* Check for V86 */
test dword ptr [ebp+KTRAP_FRAME_EFLAGS], EFLAGS_V86_MASK
/* We don't support this yet! */
V86Int4:
- int 3
+ UNHANDLED_PATH
.endfunc
.func KiTrap5
+Dr_kit5: DR_TRAP_FIXUP
+V86_kit5: V86_TRAP_FIXUP
_KiTrap5:
/* Push error code */
push 0
/* Enter trap */
- TRAP_PROLOG(5)
+ TRAP_PROLOG kit5
/* Check for V86 */
test dword ptr [ebp+KTRAP_FRAME_EFLAGS], EFLAGS_V86_MASK
/* We don't support this yet! */
V86Int5:
- int 3
+ UNHANDLED_PATH
.endfunc
.func KiTrap6
+Dr_kit6: DR_TRAP_FIXUP
+V86_kit6: V86_TRAP_FIXUP
_KiTrap6:
+
+ /* It this a V86 GPF? */
+ test dword ptr [esp+8], EFLAGS_V86_MASK
+ jz NotV86UD
+
+ /* Enter V86 Trap */
+ V86_TRAP_PROLOG kit6
+
+ /* Not yet supported (Invalid OPCODE from V86) */
+ UNHANDLED_PATH
+
+NotV86UD:
/* Push error code */
push 0
/* Enter trap */
- TRAP_PROLOG(6)
+ TRAP_PROLOG kit6
- /* Not yet supported */
- int 3
- jmp $
+ /* Check if this happened in kernel mode */
+ test byte ptr [ebp+KTRAP_FRAME_CS], MODE_MASK
+ jz KmodeOpcode
+
+ /* Check for VDM */
+ cmp word ptr [ebp+KTRAP_FRAME_CS], KGDT_R3_CODE + RPL_MASK
+ jz UmodeOpcode
+
+ /* Check if the process is vDM */
+ mov ebx, fs:[KPCR_CURRENT_THREAD]
+ mov ebx, [ebx+KTHREAD_APCSTATE_PROCESS]
+ cmp dword ptr [ebx+EPROCESS_VDM_OBJECTS], 0
+ jnz IsVdmOpcode
+
+UmodeOpcode:
+ /* Get EIP and enable interrupts at this point */
+ mov esi, [ebp+KTRAP_FRAME_EIP]
+ sti
+
+ /* Set intruction prefix length */
+ mov ecx, 4
+
+ /* Setup a SEH frame */
+ push ebp
+ push OpcodeSEH
+ push fs:[KPCR_EXCEPTION_LIST]
+ mov fs:[KPCR_EXCEPTION_LIST], esp
+
+OpcodeLoop:
+ /* Get the instruction and check if it's LOCK */
+ mov al, [esi]
+ cmp al, 0xF0
+ jz LockCrash
+
+ /* Keep moving */
+ add esi, 1
+ loop OpcodeLoop
+
+ /* Undo SEH frame */
+ pop fs:[KPCR_EXCEPTION_LIST]
+ add esp, 8
+
+KmodeOpcode:
+
+ /* Re-enable interrupts */
+ sti
+
+ /* Setup illegal instruction exception and dispatch it */
+ mov ebx, [ebp+KTRAP_FRAME_EIP]
+ mov eax, STATUS_ILLEGAL_INSTRUCTION
+ jmp _DispatchNoParam
+
+LockCrash:
+
+ /* Undo SEH Frame */
+ pop fs:[KPCR_EXCEPTION_LIST]
+ add esp, 8
+
+ /* Setup invalid lock exception and dispatch it */
+ mov ebx, [ebp+KTRAP_FRAME_EIP]
+ mov eax, STATUS_INVALID_LOCK_SEQUENCE
+ jmp _DispatchNoParam
+
+IsVdmOpcode:
+
+ /* Unhandled yet */
+ UNHANDLED_PATH
/* Return to caller */
jmp _Kei386EoiHelper@0
+
+OpcodeSEH:
+
+ /* Get SEH frame */
+ mov esp, [esp+8]
+ pop fs:[KPCR_EXCEPTION_LIST]
+ add esp, 4
+ pop ebp
+
+ /* Check if this was user mode */
+ test dword ptr [ebp+KTRAP_FRAME_CS], MODE_MASK
+ jnz KmodeOpcode
+
+ /* Do a bugcheck */
+ push ebp
+ push 0
+ push 0
+ push 0
+ push 0
+ push KMODE_EXCEPTION_NOT_HANDLED
+ call _KeBugCheckWithTf@24
.endfunc
.func KiTrap7
+Dr_kit7: DR_TRAP_FIXUP
+V86_kit7: V86_TRAP_FIXUP
_KiTrap7:
/* Push error code */
push 0
/* Enter trap */
- TRAP_PROLOG(7)
+ TRAP_PROLOG kit7
/* Get the current thread and stack */
StartTrapHandle:
cli
jmp StartTrapHandle
+KernelNpx:
+
+ /* Set delayed error */
+ or dword ptr [ecx+FN_CR0_NPX_STATE], CR0_TS
+
+ /* Check if this happened during restore */
+ cmp dword ptr [ebp+KTRAP_FRAME_EIP], offset FrRestore
+ jnz UserNpx
+
+ /* Skip instruction and dispatch the exception */
+ add dword ptr [ebp+KTRAP_FRAME_EIP], 3
+ jmp _Kei386EoiHelper@0
+
IsLoaded:
/* Check if TS is set */
test bl, CR0_TS
jnz TsSetOnLoadedState
- /* Check if the trap came from user-mode */
- int 3
+HandleNpxFault:
+ /* Check if the trap came from V86 mode */
+ test dword ptr [ebp+KTRAP_FRAME_EFLAGS], EFLAGS_V86_MASK
+ jnz V86Npx
+
+ /* Check if it came from kernel mode */
+ test byte ptr [ebp+KTRAP_FRAME_CS], MODE_MASK
+ jz KernelNpx
+
+ /* Check if it came from a VDM */
+ cmp word ptr [ebp+KTRAP_FRAME_CS], KGDT_R3_CODE + RPL_MASK
+ jne V86Npx
+
+UserNpx:
+ /* Get the current thread */
+ mov eax, fs:[KPCR_CURRENT_THREAD]
+
+ /* Check NPX state */
+ cmp byte ptr [eax+KTHREAD_NPX_STATE], NPX_STATE_NOT_LOADED
+
+ /* Get the NPX save area */
+ mov ecx, [eax+KTHREAD_INITIAL_STACK]
+ lea ecx, [ecx-NPX_FRAME_LENGTH]
+ jz NoSaveRestore
+
+HandleUserNpx:
+
+ /* Set new CR0 */
+ mov ebx, cr0
+ and ebx, ~(CR0_MP + CR0_EM + CR0_TS)
+ mov cr0, ebx
+
+ /* Check if we have FX support */
+ test byte ptr _KeI386FxsrPresent, 1
+ jz FnSave2
+
+ /* Save the state */
+ fxsave [ecx]
+ jmp MakeCr0Dirty
+FnSave2:
+ fnsave [ecx]
+ wait
+
+MakeCr0Dirty:
+ /* Make CR0 state not loaded */
+ or ebx, NPX_STATE_NOT_LOADED
+ or ebx, [ecx+FN_CR0_NPX_STATE]
+ mov cr0, ebx
+
+ /* Update NPX state */
+ mov byte ptr [eax+KTHREAD_NPX_STATE], NPX_STATE_NOT_LOADED
+ mov dword ptr fs:[KPCR_NPX_THREAD], 0
+
+NoSaveRestore:
+ /* Clear the TS bit and re-enable interrupts */
+ and dword ptr [ecx+FN_CR0_NPX_STATE], ~CR0_TS
+ sti
+
+ /* Check if we have FX support */
+ test byte ptr _KeI386FxsrPresent, 1
+ jz FnError
+
+ /* Get error offset, control and status words */
+ mov ebx, [ecx+FX_ERROR_OFFSET]
+ movzx eax, word ptr [ecx+FX_CONTROL_WORD]
+ movzx edx, word ptr [ecx+FX_STATUS_WORD]
+
+ /* Get the faulting opcode */
+ mov esi, [ecx+FX_DATA_OFFSET]
+ jmp CheckError
+
+FnError:
+ /* Get error offset, control and status words */
+ mov ebx, [ecx+FP_ERROR_OFFSET]
+ movzx eax, word ptr [ecx+FP_CONTROL_WORD]
+ movzx edx, word ptr [ecx+FP_STATUS_WORD]
+
+ /* Get the faulting opcode */
+ mov esi, [ecx+FP_DATA_OFFSET]
+
+CheckError:
+ /* Mask exceptions */
+ and eax, 0x3F
+ not eax
+ and eax, edx
+
+ /* Check if what's left is invalid */
+ test al, 1
+ jz ValidNpxOpcode
+
+ /* Check if it was a stack fault */
+ test al, 64
+ jnz InvalidStack
+
+ /* Raise exception */
+ mov eax, STATUS_FLOAT_INVALID_OPERATION
+ jmp _DispatchOneParam
+
+InvalidStack:
+
+ /* Raise exception */
+ mov eax, STATUS_FLOAT_STACK_CHECK
+ jmp _DispatchTwoParam
+
+ValidNpxOpcode:
+
+ /* Check for divide by 0 */
+ test al, 4
+ jz 1f
+
+ /* Raise exception */
+ mov eax, STATUS_FLOAT_DIVIDE_BY_ZERO
+ jmp _DispatchOneParam
+
+1:
+ /* Check for denormal */
+ test al, 2
+ jz 1f
+
+ /* Raise exception */
+ mov eax, STATUS_FLOAT_INVALID_OPERATION
+ jmp _DispatchOneParam
+
+1:
+ /* Check for overflow */
+ test al, 8
+ jz 1f
+
+ /* Raise exception */
+ mov eax, STATUS_FLOAT_OVERFLOW
+ jmp _DispatchOneParam
+
+1:
+ /* Check for underflow */
+ test al, 16
+ jz 1f
+
+ /* Raise exception */
+ mov eax, STATUS_FLOAT_UNDERFLOW
+ jmp _DispatchOneParam
+
+1:
+ /* Check for precision fault */
+ test al, 32
+ jz UnexpectedNpx
+
+ /* Raise exception */
+ mov eax, STATUS_FLOAT_INEXACT_RESULT
+ jmp _DispatchOneParam
+
+UnexpectedNpx:
+
+ /* Strange result, bugcheck the OS */
+ sti
+ push ebp
+ push 0
+ push 0
+ push eax
+ push 1
+ push TRAP_CAUSE_UNKNOWN
+ call _KeBugCheckWithTf@24
+
+V86Npx:
+ /* Check if this is a VDM */
+ mov eax, fs:[KPCR_CURRENT_THREAD]
+ mov ebx, [eax+KTHREAD_APCSTATE_PROCESS]
+ cmp dword ptr [ebx+EPROCESS_VDM_OBJECTS], 0
+ jz HandleUserNpx
+
+ /* V86 NPX not handled */
+ UNHANDLED_PATH
EmulationEnabled:
/* Did this come from kernel-mode? */
/* It came from user-mode, so this would only be valid inside a VDM */
/* Since we don't actually have VDMs in ROS, bugcheck. */
- jmp BogusTrap2
+ jmp UnexpectedNpx
TsSetOnLoadedState:
/* TS shouldn't be set, unless this we don't have a Math Processor */
clts
jmp _Kei386EoiHelper@0
-BogusTrap2:
- /* Cause a bugcheck */
- sti
- push 0
- push 0
- push eax
- push 1
- push TRAP_CAUSE_UNKNOWN
- call _KeBugCheckEx@20
-
BogusTrap:
/* Cause a bugcheck */
push 0
.endfunc
.func KiTrap9
+Dr_kit9: DR_TRAP_FIXUP
+V86_kit9: V86_TRAP_FIXUP
_KiTrap9:
/* Push error code */
push 0
/* Enter trap */
- TRAP_PROLOG(9)
+ TRAP_PROLOG kit9
/* Enable interrupts and bugcheck */
sti
.endfunc
.func KiTrap10
+Dr_kit10: DR_TRAP_FIXUP
+V86_kit10: V86_TRAP_FIXUP
_KiTrap10:
/* Enter trap */
- TRAP_PROLOG(10)
+ TRAP_PROLOG kit10
/* Check for V86 */
test dword ptr [ebp+KTRAP_FRAME_EFLAGS], EFLAGS_V86_MASK
.endfunc
.func KiTrap11
+Dr_kit11: DR_TRAP_FIXUP
+V86_kit11: V86_TRAP_FIXUP
_KiTrap11:
/* Enter trap */
- TRAP_PROLOG(11)
+ TRAP_PROLOG kit11
/* FIXME: ROS Doesn't handle segment faults yet */
mov eax, 11
.endfunc
.func KiTrap12
+Dr_kit12: DR_TRAP_FIXUP
+V86_kit12: V86_TRAP_FIXUP
_KiTrap12:
/* Enter trap */
- TRAP_PROLOG(12)
+ TRAP_PROLOG kit12
/* FIXME: ROS Doesn't handle stack faults yet */
mov eax, 12
jmp _KiSystemFatalException
.endfunc
+.func KiTrapExceptHandler
+_KiTrapExceptHandler:
+
+ /* Setup SEH handler frame */
+ mov esp, [esp+8]
+ pop fs:[KPCR_EXCEPTION_LIST]
+ add esp, 4
+ pop ebp
+
+ /* Check if the fault came from user mode */
+ test dword ptr [ebp+KTRAP_FRAME_CS], MODE_MASK
+ jnz SetException
+
+ /* Kernel fault, bugcheck */
+ push ebp
+ push 0
+ push 0
+ push 0
+ push 0
+ push KMODE_EXCEPTION_NOT_HANDLED
+ call _KeBugCheckWithTf@24
+.endfunc
+
.func KiTrap13
+Dr_kitd: DR_TRAP_FIXUP
+V86_kitd: V86_TRAP_FIXUP
_KiTrap13:
/* It this a V86 GPF? */
jnz NoReflect
/* FIXME: TODO */
- int 3
+ UNHANDLED_PATH
NoReflect:
NotV86:
/* Enter trap */
- TRAP_PROLOG(13)
+ TRAP_PROLOG kitd
/* Check if this was from kernel-mode */
test dword ptr [ebp+KTRAP_FRAME_CS], MODE_MASK
jnz UserModeGpf
- /* FIXME: Check for GPF during GPF */
+ /* Check if we have a VDM alert */
+ cmp dword ptr fs:[KPCR_VDM_ALERT], 0
+ jnz VdmAlertGpf
+
+ /* Check for GPF during GPF */
+ mov eax, [ebp+KTRAP_FRAME_EIP]
+ cmp eax, offset CheckPrivilegedInstruction
+ jbe KmodeGpf
+ cmp eax, offset CheckPrivilegedInstruction2
+
+ /* FIXME: TODO */
+ UNHANDLED_PATH
/* Get the opcode and trap frame */
+KmodeGpf:
mov eax, [ebp+KTRAP_FRAME_EIP]
mov eax, [eax]
mov edx, [ebp+KTRAP_FRAME_EBP]
MsrCheck:
/* FIXME: Handle RDMSR/WRMSR */
- int 3
- jmp $
+ UNHANDLED_PATH
NotIretGpf:
UserModeGpf:
- /* FIXME: Unhandled */
- int 3
- jmp $
+ /* If the previous mode was kernel, raise a fatal exception */
+ mov eax, 13
+ test byte ptr [ebp+KTRAP_FRAME_CS], MODE_MASK
+ jz _KiSystemFatalException
+
+ /* Get the process and check which CS this came from */
+ mov ebx, fs:[KPCR_CURRENT_THREAD]
+ mov ebx, [ebx+KTHREAD_APCSTATE_PROCESS]
+ cmp word ptr [ebp+KTRAP_FRAME_CS], KGDT_R3_CODE + RPL_MASK
+ jz CheckVdmGpf
+
+ /* Check if this is a VDM */
+ cmp dword ptr [ebx+EPROCESS_VDM_OBJECTS], 0
+ jnz DispatchV86Gpf
+
+ /* Enable interrupts and check if we have an error code */
+ sti
+ cmp word ptr [ebp+KTRAP_FRAME_ERROR_CODE], 0
+ jnz SetException
+ jmp CheckPrivilegedInstruction
+
+HandleSegPop2:
+ /* Update EIP (will be updated below again) */
+ add dword ptr [ebp+KTRAP_FRAME_EIP], 1
+
+HandleEsPop:
+ /* Clear the segment, update EIP and ESP */
+ mov dword ptr [edx], 0
+ add dword ptr [ebp+KTRAP_FRAME_EIP], 1
+ add dword ptr [ebp+KTRAP_FRAME_ESP], 4
+ jmp _Kei386EoiHelper@0
+
+CheckVdmGpf:
+ /* Check if this is a VDM */
+ cmp dword ptr [ebx+EPROCESS_VDM_OBJECTS], 0
+ jz CheckPrivilegedInstruction
+
+ /* Bring interrupts back */
+ sti
+
+ /* Check what kind of instruction this is */
+ mov eax, [ebp+KTRAP_FRAME_EIP]
+ mov eax, [eax]
+
+ /* FIXME: Check for BOP4 */
+
+ /* Check if this is POP ES */
+ mov edx, ebp
+ add edx, KTRAP_FRAME_ES
+ cmp al, 0x07
+ jz HandleEsPop
+
+ /* Check if this is POP FS */
+ add edx, KTRAP_FRAME_FS - KTRAP_FRAME_ES
+ cmp ax, 0xA10F
+ jz HandleSegPop2
+
+ /* Check if this is POP GS */
+ add edx, KTRAP_FRAME_GS - KTRAP_FRAME_FS
+ cmp ax, 0xA90F
+ jz HandleSegPop2
+
+CheckPrivilegedInstruction:
+ /* Bring interrupts back */
+ sti
+
+ /* Setup a SEH handler */
+ push ebp
+ push offset _KiTrapExceptHandler
+ push fs:[KPCR_EXCEPTION_LIST]
+ mov fs:[KPCR_EXCEPTION_LIST], esp
+
+ /* Get EIP */
+ mov esi, [ebp+KTRAP_FRAME_EIP]
+
+ /* Setup loop count */
+ mov ecx, 15
+
+InstLoop:
+ /* Save loop count */
+ push ecx
+
+ /* Get the instruction */
+ lods byte ptr [esi]
+
+ /* Now lookup in the prefix table */
+ mov ecx, 11
+ mov edi, offset _KiTrapPrefixTable
+ repnz scasb
+
+ /* Restore loop count */
+ pop ecx
+
+ /* If it's not a prefix byte, check other instructions */
+ jnz NotPrefixByte
+
+ /* FIXME */
+ UNHANDLED_PATH
+
+NotPrefixByte:
+ /* FIXME: Check if it's a HLT */
+
+ /* Check if the instruction has two bytes */
+ cmp al, 0xF
+ jne CheckRing3Io
+
+ /* FIXME */
+ UNHANDLED_PATH
+
+CheckRing3Io:
+ /* Get EFLAGS and IOPL */
+ mov ebx, [ebp+KTRAP_FRAME_EFLAGS]
+ and ebx, 0x3000
+ shr ebx, 12
+
+ /* Check the CS's RPL mask */
+ mov ecx, [ebp+KTRAP_FRAME_CS]
+ and ecx, RPL_MASK
+ cmp ebx, ecx
+ jge NotIoViolation
+
+CheckPrivilegedInstruction2:
+ /* Check if this is a CLI or STI */
+ cmp al, 0xFA
+ je IsPrivInstruction
+ cmp al, 0xFB
+ je IsPrivInstruction
+
+ /* Setup I/O table lookup */
+ mov ecx, 13
+ mov edi, offset _KiTrapIoTable
+
+ /* Loopup in the table */
+ repnz scasb
+ jnz NotIoViolation
+
+ /* FIXME: Check IOPM!!! */
+
+IsPrivInstruction:
+ /* Cleanup the SEH frame */
+ pop fs:[KPCR_EXCEPTION_LIST]
+ add esp, 8
+
+ /* Setup the exception */
+ mov ebx, [ebp+KTRAP_FRAME_EIP]
+ mov eax, STATUS_PRIVILEGED_INSTRUCTION
+ jmp _DispatchNoParam
+
+NotIoViolation:
+ /* Cleanup the SEH frame */
+ pop fs:[KPCR_EXCEPTION_LIST]
+ add esp, 8
+
+SetException:
+ /* Setup the exception */
+ mov ebx, [ebp+KTRAP_FRAME_EIP]
+ mov esi, -1
+ mov eax, STATUS_ACCESS_VIOLATION
+ jmp _DispatchTwoParam
+
+DispatchV86Gpf:
+ /* FIXME */
+ UNHANDLED_PATH
.endfunc
.func KiTrap14
+Dr_kit14: DR_TRAP_FIXUP
+V86_kit14: V86_TRAP_FIXUP
_KiTrap14:
+
/* Enter trap */
- TRAP_PROLOG(14)
+ TRAP_PROLOG kit14
+
+ /* Check if we have a VDM alert */
+ cmp dword ptr fs:[KPCR_VDM_ALERT], 0
+ jnz VdmAlertGpf
- /* Call the C exception handler */
- push 14
+ /* Get the current thread */
+ mov edi, fs:[KPCR_CURRENT_THREAD]
+
+ /* Get the stack address of the frame */
+ lea eax, [esp+KTRAP_FRAME_LENGTH+NPX_FRAME_LENGTH]
+ sub eax, [edi+KTHREAD_INITIAL_STACK]
+ jz NoFixUp
+
+ /* This isn't the base frame, check if it's the second */
+ cmp eax, -KTRAP_FRAME_EFLAGS
+ jb NoFixUp
+
+ /* Check if we have a TEB */
+ mov eax, fs:[KPCR_TEB]
+ or eax, eax
+ jle NoFixUp
+
+ /* Fixup the frame */
+ call _KiFixupFrame
+
+ /* Save CR2 */
+NoFixUp:
+ mov edi, cr2
+
+ /* ROS HACK: Sometimes we get called with INTS DISABLED! WTF? */
+ test dword ptr [ebp+KTRAP_FRAME_EFLAGS], EFLAGS_INTERRUPT_MASK
+ je HandlePf
+
+ /* Enable interrupts and check if we got here with interrupts disabled */
+ sti
+ test dword ptr [ebp+KTRAP_FRAME_EFLAGS], EFLAGS_INTERRUPT_MASK
+ jz IllegalState
+
+HandlePf:
+ /* Send trap frame and check if this is kernel-mode or usermode */
push ebp
- call _KiPageFaultHandler
- add esp, 8
+ mov eax, [ebp+KTRAP_FRAME_CS]
+ and eax, MODE_MASK
+ push eax
- /* Return to caller */
+ /* Send faulting address and check if this is read or write */
+ push edi
+ mov eax, [ebp+KTRAP_FRAME_ERROR_CODE]
+ and eax, 1
+ push eax
+
+ /* Call the access fault handler */
+ call _MmAccessFault@16
+ test eax, eax
+ jl AccessFail
+
+ /* Access fault handled, return to caller */
jmp _Kei386EoiHelper@0
+
+AccessFail:
+ /* First check if this is a fault in the S-LIST functions */
+ mov ecx, offset _ExpInterlockedPopEntrySListFault@0
+ cmp [ebp+KTRAP_FRAME_EIP], ecx
+ jz SlistFault
+
+ /* Check if this is a fault in the syscall handler */
+ mov ecx, offset CopyParams
+ cmp [ebp+KTRAP_FRAME_EIP], ecx
+ jz SysCallCopyFault
+ mov ecx, offset ReadBatch
+ cmp [ebp+KTRAP_FRAME_EIP], ecx
+ jnz CheckVdmPf
+
+ /* FIXME: TODO */
+ UNHANDLED_PATH
+ jmp _Kei386EoiHelper@0
+
+SysCallCopyFault:
+ /* FIXME: TODO */
+ UNHANDLED_PATH
+ jmp _Kei386EoiHelper@0
+
+ /* Check if the fault occured in a V86 mode */
+CheckVdmPf:
+ mov ecx, [ebp+KTRAP_FRAME_ERROR_CODE]
+ and ecx, 1
+ shr ecx, 1
+ test dword ptr [ebp+KTRAP_FRAME_EFLAGS], EFLAGS_V86_MASK
+ jnz VdmPF
+
+ /* Check if the fault occured in a VDM */
+ mov esi, fs:[KPCR_CURRENT_THREAD]
+ mov esi, [esi+KTHREAD_APCSTATE_PROCESS]
+ cmp dword ptr [esi+EPROCESS_VDM_OBJECTS], 0
+ jz CheckStatus
+
+ /* Check if we this was in kernel-mode */
+ test byte ptr [ebp+KTRAP_FRAME_CS], MODE_MASK
+ jz CheckStatus
+ cmp word ptr [ebp+KTRAP_FRAME_CS], KGDT_R3_CODE + RPL_MASK
+ jz CheckStatus
+
+VdmPF:
+ /* FIXME: TODO */
+ UNHANDLED_PATH
+
+ /* Save EIP and check what kind of status failure we got */
+CheckStatus:
+ mov esi, [ebp+KTRAP_FRAME_EIP]
+ cmp eax, STATUS_ACCESS_VIOLATION
+ je AccessViol
+ cmp eax, STATUS_GUARD_PAGE_VIOLATION
+ je SpecialCode
+ cmp eax, STATUS_STACK_OVERFLOW
+ je SpecialCode
+
+ /* Setup an in-page exception to dispatch */
+ mov edx, ecx
+ mov ebx, esi
+ mov esi, edi
+ mov ecx, 3
+ mov edi, eax
+ mov eax, STATUS_IN_PAGE_ERROR
+ call _CommonDispatchException
+
+AccessViol:
+ /* Use more proper status code */
+ mov eax, KI_EXCEPTION_ACCESS_VIOLATION
+
+SpecialCode:
+ /* Setup a normal page fault exception */
+ mov ebx, esi
+ mov edx, ecx
+ mov esi, edi
+ jmp _DispatchTwoParam
+
+SlistFault:
+ /* FIXME: TODO */
+ UNHANDLED_PATH
+
+IllegalState:
+
+ /* This is completely illegal, bugcheck the system */
+ push ebp
+ push esi
+ push ecx
+ push eax
+ push edi
+ push IRQL_NOT_LESS_OR_EQUAL
+ call _KeBugCheckWithTf@24
+
+VdmAlertGpf:
+
+ /* FIXME: NOT SUPPORTED */
+ UNHANDLED_PATH
.endfunc
.func KiTrap0F
+Dr_kit15: DR_TRAP_FIXUP
+V86_kit15: V86_TRAP_FIXUP
_KiTrap0F:
/* Push error code */
push 0
/* Enter trap */
- TRAP_PROLOG(15)
+ TRAP_PROLOG kit15
sti
/* Raise a fatal exception */
.endfunc
.func KiTrap16
+Dr_kit16: DR_TRAP_FIXUP
+V86_kit16: V86_TRAP_FIXUP
_KiTrap16:
/* Push error code */
push 0
/* Enter trap */
- TRAP_PROLOG(16)
+ TRAP_PROLOG kit16
- /* FIXME: ROS Doesn't handle FPU faults yet */
- mov eax, 16
- jmp _KiSystemFatalException
+ /* Check if this is the NPX Thread */
+ mov eax, fs:[KPCR_CURRENT_THREAD]
+ cmp eax, fs:[KPCR_NPX_THREAD]
+
+ /* Get the initial stack and NPX frame */
+ mov ecx, [eax+KTHREAD_INITIAL_STACK]
+ lea ecx, [ecx-NPX_FRAME_LENGTH]
+
+ /* If this is a valid fault, handle it */
+ jz HandleNpxFault
+
+ /* Otherwise, re-enable interrupts and set delayed error */
+ sti
+ or dword ptr [ecx+FN_CR0_NPX_STATE], CR0_TS
+ jmp _Kei386EoiHelper@0
.endfunc
.func KiTrap17
+Dr_kit17: DR_TRAP_FIXUP
+V86_kit17: V86_TRAP_FIXUP
_KiTrap17:
/* Push error code */
push 0
/* Enter trap */
- TRAP_PROLOG(17)
+ TRAP_PROLOG kit17
/* FIXME: ROS Doesn't handle alignment faults yet */
mov eax, 17
ret
.endfunc
+.func Ki16BitStackException
+_Ki16BitStackException:
+
+ /* Save stack */
+ push ss
+ push esp
+
+ /* Go to kernel mode thread stack */
+ mov eax, fs:[KPCR_CURRENT_THREAD]
+ add esp, [eax+KTHREAD_INITIAL_STACK]
+
+ /* Switch to good stack segment */
+ UNHANDLED_PATH
+.endfunc
+
/* UNEXPECTED INTERRUPT HANDLERS **********************************************/
.globl _KiStartUnexpectedRange@0
jmp _KiUnexpectedInterruptTail
.func KiUnexpectedInterruptTail
+V86_kui: V86_TRAP_FIXUP
+Dr_kui: DR_TRAP_FIXUP
_KiUnexpectedInterruptTail:
/* Enter interrupt trap */
_KiUnexpectedInterrupt:
/* Bugcheck with invalid interrupt code */
- push 0x12
+ push TRAP_CAUSE_UNKNOWN
call _KeBugCheck@4
/* INTERRUPT HANDLERS ********************************************************/
/* Restore stack and exception list */
pop esp
- pop dword ptr [ebx]
+ pop dword ptr [ebx+KPCR_EXCEPTION_LIST]
pop ebp
CheckQuantum:
/* Check if we have a thread to swap to */
cmp byte ptr [ebx+KPCR_PRCB_NEXT_THREAD], 0
- jz Return
+ je Return
- /* FIXME: Schedule new thread */
- int 3
+ /* Make space on the stack to save registers */
+ sub esp, 3 * 4
+ mov [esp+8], esi
+ mov [esp+4], edi
+ mov [esp+0], ebp
+
+ /* Get the current thread */
+ mov edi, [ebx+KPCR_CURRENT_THREAD]
+
+#ifdef CONFIG_SMP
+ #error SMP Interrupt not handled!
+#endif
+
+ /* Get the next thread and clear it */
+ mov esi, [ebx+KPCR_PRCB_NEXT_THREAD]
+ and dword ptr [ebx+KPCR_PRCB_NEXT_THREAD], 0
+
+ /* Set us as the current running thread */
+ mov [ebx+KPCR_CURRENT_THREAD], esi
+ mov byte ptr [esi+KTHREAD_STATE], Running
+ mov byte ptr [edi+KTHREAD_WAIT_REASON], WrDispatchInt
+
+ /* Put thread in ECX and get the PRCB in EDX */
+ mov ecx, edi
+ lea edx, [ebx+KPCR_PRCB_DATA]
+ call @KiQueueReadyThread@8
+
+ /* Set APC_LEVEL and do the swap */
+ mov cl, APC_LEVEL
+ call @KiSwapContextInternal@0
+
+ /* Restore registers */
+ mov ebp, [esp+0]
+ mov edi, [esp+4]
+ mov esi, [esp+8]
+ add esp, 3*4
Return:
/* All done */
.endfunc
.func KiInterruptTemplate
+V86_kit: V86_TRAP_FIXUP
+Dr_kit: DR_TRAP_FIXUP
_KiInterruptTemplate:
/* Enter interrupt trap */
_KiChainedDispatch2ndLvl@0:
/* Not yet supported */
- int 3
+ UNHANDLED_PATH
.endfunc
.func KiChainedDispatch@0
RELEASE_SPINLOCK(esi)
/* Exit the interrupt */
- mov esi, $
cli
call _HalEndSystemInterrupt@8
jmp _Kei386EoiHelper@0
SpuriousInt:
/* Exit the interrupt */
add esp, 8
- mov esi, $
jmp _Kei386EoiHelper@0
#ifdef CONFIG_SMP
projects / reactos.git / blobdiff