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- Move some assembly functions around in better suited locations.
- Merge syscall.S and trap.S into trap.S, and nicely document the software interrupt table that we service, as well as special cases. svn path=/trunk/; revision=20936
This commit is contained in:
Alex Ionescu
parent
93c504407b
commit
f2414f3c2c
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@ -46,3 +46,26 @@ _KeFlushCurrentTb@0:
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mov cr3, eax
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ret
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.endfunc
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.globl _KiCoprocessorError@0
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.func KiCoprocessorError@0
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_KiCoprocessorError@0:
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/* Get the NPX Thread's Initial stack */
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mov eax, [fs:KPCR_NPX_THREAD]
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mov eax, [eax+KTHREAD_INITIAL_STACK]
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/* Make space for the FPU Save area */
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sub eax, SIZEOF_FX_SAVE_AREA
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/* Set the CR0 State */
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mov dword ptr [eax+FN_CR0_NPX_STATE], 8
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/* Update it */
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mov eax, cr0
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or eax, 8
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mov cr0, eax
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/* Return to caller */
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ret
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.endfunc
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@ -329,3 +329,37 @@ SameProcess:
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add esp, 4 * 4
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ret
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.globl _Ki386AdjustEsp0@4
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.func Ki386AdjustEsp0@4
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_Ki386AdjustEsp0@4:
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/* Get the current thread */
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mov eax, [fs:KPCR_CURRENT_THREAD]
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/* Get trap frame and stack */
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mov edx, [esp+4]
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mov eax, [eax+KTHREAD_INITIAL_STACK]
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/* Check if V86 */
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test dword ptr [edx+KTRAP_FRAME_EFLAGS], EFLAGS_V86_MASK
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jnz 1f
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/* Bias the stack */
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sub eax, KTRAP_FRAME_V86_GS - KTRAP_FRAME_SS
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1:
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/* Skip FX Save Area */
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sub eax, SIZEOF_FX_SAVE_AREA
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/* Disable interrupts */
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pushf
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cli
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/* Adjust ESP0 */
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mov edx, [fs:KPCR_TSS]
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mov ss:[edx+KTSS_ESP0], eax
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/* Enable interrupts and return */
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popf
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ret 4
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.endfunc
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@ -1,584 +0,0 @@
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/*
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* FILE: ntoskrnl/ke/i386/syscall.S
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* COPYRIGHT: See COPYING in the top level directory
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* PURPOSE: System Call Handler
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* PROGRAMMER: Alex Ionescu (alex@relsoft.net)
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*/
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#include <asm.h>
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#include <internal/i386/asmmacro.S>
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.globl _KiServiceExit
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.globl _KiServiceExit2
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.globl _KiFastCallEntry
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.globl _KiSystemService
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.globl _KiDebugService
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.globl _Kei386EoiHelper@0
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.globl _NtRaiseException@12
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.globl _NtContinue@8
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.intel_syntax noprefix
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/*
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* FIXMEs:
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* - Figure out why ES/DS gets messed up in VMWare, when doing KiServiceExit only,
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* and only when called from user-mode, and returning to user-mode.
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* - Merge with trap.S and document all traps.
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* - Use MmProbe when copying arguments to syscall.
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* - Add DR macro/save and VM macro/save.
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* - Implement KiCallbackReturn, KiGetTickCount, KiRaiseAssertion
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*/
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/* FUNCTIONS ***************************************************************/
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.func KiSystemService
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_KiSystemService:
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/* Enter the shared system call prolog */
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SYSCALL_PROLOG
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/* Jump to the actual handler */
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jmp SharedCode
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.endfunc
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BadStack:
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/* Restore ESP0 stack */
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mov ecx, [fs:KPCR_TSS]
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mov esp, ss:[ecx+KTSS_ESP0]
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/* Generate V86M Stack for Trap 6 */
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push 0
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push 0
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push 0
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push 0
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/* Generate interrupt stack for Trap 6 */
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push KGDT_R3_DATA + RPL_MASK
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push 0
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push 0x20202
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push KGDT_R3_CODE + RPL_MASK
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push 0
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jmp _KiTrap6
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.func KiFastCallEntry
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_KiFastCallEntry:
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/* Set FS to PCR */
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mov ecx, KGDT_R0_PCR
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mov fs, cx
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/* Set DS/ES to Kernel Selector */
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mov ecx, KGDT_R0_DATA
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mov ds, cx
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mov es, cx
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/* Set the current stack to Kernel Stack */
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mov ecx, [fs:KPCR_TSS]
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mov esp, ss:[ecx+KTSS_ESP0]
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/* Set up a fake INT Stack. */
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push KGDT_R3_DATA + RPL_MASK
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push edx /* Ring 3 SS:ESP */
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pushf /* Ring 3 EFLAGS */
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push 2 /* Ring 0 EFLAGS */
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add edx, 8 /* Skip user parameter list */
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popf /* Set our EFLAGS */
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or dword ptr [esp], EFLAGS_INTERRUPT_MASK /* Re-enable IRQs in EFLAGS, to fake INT */
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push KGDT_R3_CODE + RPL_MASK
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push KUSER_SHARED_SYSCALL_RET
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/* Setup the Trap Frame stack */
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push 0
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push ebp
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push ebx
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push esi
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push edi
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push KGDT_R3_TEB + RPL_MASK
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/* Save pointer to our PCR */
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mov ebx, [fs:KPCR_SELF]
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/* Get a pointer to the current thread */
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mov esi, [ebx+KPCR_CURRENT_THREAD]
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/* Set the exception handler chain terminator */
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push [ebx+KPCR_EXCEPTION_LIST]
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mov dword ptr [ebx+KPCR_EXCEPTION_LIST], -1
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/* Use the thread's stack */
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mov ebp, [esi+KTHREAD_INITIAL_STACK]
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/* Push previous mode */
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push UserMode
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/* Skip the other registers */
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sub esp, 0x48
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/* Hack: it seems that on VMWare someone damages ES/DS on exit. Investigate! */
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mov dword ptr [esp+KTRAP_FRAME_DS], KGDT_R3_DATA + RPL_MASK
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mov dword ptr [esp+KTRAP_FRAME_ES], KGDT_R3_DATA + RPL_MASK
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/* Make space for us on the stack */
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sub ebp, 0x29C
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/* Write the previous mode */
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mov byte ptr [esi+KTHREAD_PREVIOUS_MODE], UserMode
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/* Sanity check */
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cmp ebp, esp
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jnz BadStack
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/* Flush DR7 */
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and dword ptr [ebp+KTRAP_FRAME_DR7], 0
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/* Check if the thread was being debugged */
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test byte ptr [esi+KTHREAD_DEBUG_ACTIVE], 0xFF
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/* Set the thread's trap frame */
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mov [esi+KTHREAD_TRAP_FRAME], ebp
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/* Save DR registers if needed */
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//jnz Dr_FastCallDrSave
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/* Set the trap frame debug header */
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SET_TF_DEBUG_HEADER
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#ifdef DBG // FIXME: Is this for GDB? Can it be moved in the stub?
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/*
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* We want to know the address from where the syscall stub was called.
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* If PrevMode is KernelMode, that address is stored in our own (kernel)
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* stack, at location KTRAP_FRAME_ESP.
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* If we're coming from UserMode, we load the usermode stack pointer
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* and go back two frames (first frame is the syscall stub, second call
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* is the caller of the stub).
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*/
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mov edi, [ebp+KTRAP_FRAME_ESP]
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test byte ptr [esi+KTHREAD_PREVIOUS_MODE], 0x01
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jz PrevWasKernelMode
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mov edi, [edi+4]
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PrevWasKernelMode:
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mov [ebp+KTRAP_FRAME_DEBUGEIP], edi
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#endif
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/* Enable interrupts */
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sti
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SharedCode:
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/*
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* Find out which table offset to use. Converts 0x1124 into 0x10.
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* The offset is related to the Table Index as such: Offset = TableIndex x 10
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*/
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mov edi, eax
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shr edi, SERVICE_TABLE_SHIFT
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and edi, SERVICE_TABLE_MASK
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mov ecx, edi
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/* Now add the thread's base system table to the offset */
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add edi, [esi+KTHREAD_SERVICE_TABLE]
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/* Get the true syscall ID and check it */
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mov ebx, eax
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and eax, SERVICE_NUMBER_MASK
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cmp eax, [edi+SERVICE_DESCRIPTOR_LIMIT]
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/* Invalid ID, try to load Win32K Table */
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jnb KiBBTUnexpectedRange
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#if 0 // <== Disabled for two reasons: We don't save TEB in 0x18, but KPCR.
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// <== We don't have a KeGdiFlushUserBatch callback yet (needs to be
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// sent through the PsInitializeWin32Callouts structure)
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/* Check if this was Win32K */
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cmp ecx, SERVICE_TABLE_TEST
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jnz NotWin32K
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/* Get the TEB */
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mov ecx, [fs:KPCR_TEB]
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/* Check if we should flush the User Batch */
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xor ebx, ebx
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or ebx, [ecx+TEB_GDI_BATCH_COUNT]
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jz NoWin32K
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/* Flush it */
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push edx
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push eax
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call [_KeGdiFlushUserBatch]
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pop eax
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pop edx
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#endif
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NotWin32K:
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/* Increase total syscall count */
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inc dword ptr fs:[KPCR_SYSTEM_CALLS]
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#ifdef DBG
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/* Increase per-syscall count */
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mov ecx, [edi+SERVICE_DESCRIPTOR_COUNT]
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jecxz NoCountTable
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inc dword ptr [ecx+eax*4]
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#endif
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/* Users's current stack frame pointer is source */
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NoCountTable:
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mov esi, edx
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/* Allocate room for argument list from kernel stack */
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mov ebx, [edi+SERVICE_DESCRIPTOR_NUMBER]
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xor ecx, ecx
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mov cl, [eax+ebx]
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/* Get pointer to function */
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mov edi, [edi+SERVICE_DESCRIPTOR_BASE]
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mov ebx, [edi+eax*4]
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/* Allocate space on our stack */
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sub esp, ecx
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/*
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* Copy the arguments from the user stack to our stack
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* FIXME: This needs to be probed with MmSystemRangeStart
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*/
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shr ecx, 2
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mov edi, esp
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rep movsd
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#ifdef DBG
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/* Make sure this isn't a user-mode call at elevated IRQL */
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test byte ptr [ebp+KTRAP_FRAME_CS], MODE_MASK
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jz SkipCheck
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call _KeGetCurrentIrql@0
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or al, al
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jnz InvalidIrql
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/*
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* The following lines are for the benefit of GDB. It will see the return
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* address of the "call ebx" below, find the last label before it and
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* thinks that that's the start of the function. It will then check to see
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* if it starts with a standard function prolog (push ebp, mov ebp,esp).
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* When that standard function prolog is not found, it will stop the
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* stack backtrace. Since we do want to backtrace into usermode, let's
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* make GDB happy and create a standard prolog.
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*/
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SkipCheck:
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KiSystemService:
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push ebp
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mov ebp,esp
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pop ebp
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#endif
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/* Do the System Call */
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call ebx
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#ifdef DBG
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/* Make sure the user-mode call didn't return at elevated IRQL */
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test byte ptr [ebp+KTRAP_FRAME_CS], MODE_MASK
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jz SkipCheck2
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mov esi, eax /* We need to save the syscall's return val */
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call _KeGetCurrentIrql@0
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or al, al
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jnz InvalidIrql
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mov eax, esi /* Restore it */
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/* Get our temporary current thread pointer for sanity check */
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mov ecx, fs:[KPCR_CURRENT_THREAD]
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/* Make sure that we are not attached and that APCs are not disabled */
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mov dl, [ecx+KTHREAD_APC_STATE_INDEX]
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or dl, dl
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jnz InvalidIndex
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mov edx, [ecx+KTHREAD_COMBINED_APC_DISABLE]
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or edx, edx
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jnz InvalidIndex
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#endif
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SkipCheck2:
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/* Deallocate the kernel stack frame */
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mov esp, ebp
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KeReturnFromSystemCall:
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/* Get the Current Thread */
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mov ecx, [fs:KPCR_CURRENT_THREAD]
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/* Restore the old trap frame pointer */
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mov edx, [ebp+KTRAP_FRAME_EDX]
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mov [ecx+KTHREAD_TRAP_FRAME], edx
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.endfunc
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.func KiServiceExit
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_KiServiceExit:
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/* Disable interrupts */
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cli
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/* Check for, and deliver, User-Mode APCs if needed */
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CHECK_FOR_APC_DELIVER 1
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/* Hack for VMWare: Sometimes ES/DS seem to be invalid when returning to user-mode. Investigate! */
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mov es, [ebp+KTRAP_FRAME_ES]
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mov ds, [ebp+KTRAP_FRAME_DS]
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/* Exit and cleanup */
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TRAP_EPILOG FromSystemCall, DoRestorePreviousMode, DoNotRestoreSegments, DoNotRestoreVolatiles, DoRestoreEverything
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.endfunc
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KiBBTUnexpectedRange:
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/* If this isn't a Win32K call, fail */
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cmp ecx, 0x10
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jne InvalidCall
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/* Set up Win32K Table */
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push edx
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push ebx
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call _PsConvertToGuiThread@0
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/* FIXME: Handle failure */
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pop eax
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pop edx
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/* Reset trap frame address */
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mov ebp, esp
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mov [esi+KTHREAD_TRAP_FRAME], ebp
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/* Try the Call again */
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jmp SharedCode
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InvalidCall:
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/* Invalid System Call */
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mov eax, STATUS_INVALID_SYSTEM_SERVICE
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jmp KeReturnFromSystemCall
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#ifdef DBG
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InvalidIrql:
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/* Save current IRQL */
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push fs:[KPCR_IRQL]
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/* Set us at passive */
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mov dword ptr fs:[KPCR_IRQL], 0
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cli
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/* Bugcheck */
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push 0
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push 0
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push eax
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push ebx
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push IRQL_GT_ZERO_AT_SYSTEM_SERVICE
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call _KeBugCheckEx@20
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InvalidIndex:
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/* Get the index and APC state */
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movzx eax, byte ptr [ecx+KTHREAD_APC_STATE_INDEX]
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mov edx, [ecx+KTHREAD_COMBINED_APC_DISABLE]
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/* Bugcheck */
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push 0
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push edx
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push eax
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push ebx
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push APC_INDEX_MISMATCH
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call _KeBugCheckEx@20
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ret
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#endif
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.func KiServiceExit2
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_KiServiceExit2:
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/* Disable interrupts */
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cli
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/* Check for, and deliver, User-Mode APCs if needed */
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CHECK_FOR_APC_DELIVER 0
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/* Exit and cleanup */
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TRAP_EPILOG NotFromSystemCall, DoRestorePreviousMode, DoRestoreSegments, DoRestoreVolatiles, DoNotRestoreEverything
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.endfunc
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.func Kei386EoiHelper@0
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_Kei386EoiHelper@0:
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/* Disable interrupts */
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cli
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/* Check for, and deliver, User-Mode APCs if needed */
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CHECK_FOR_APC_DELIVER 0
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/* Exit and cleanup */
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TRAP_EPILOG NotFromSystemCall, DoNotRestorePreviousMode, DoRestoreSegments, DoRestoreVolatiles, DoNotRestoreEverything
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.endfunc
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V86_Exit:
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/* Move to EDX position */
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add esp, KTRAP_FRAME_EDX
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/* Restore volatiles */
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pop edx
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pop ecx
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pop eax
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/* Move to non-volatiles */
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lea esp, [ebp+KTRAP_FRAME_EDI]
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pop edi
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pop esi
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pop ebx
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pop ebp
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/* Skip error code and return */
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add esp, 4
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iret
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AbiosExit:
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/* Not yet supported */
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int 3
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_KiDebugService:
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/* Push error code */
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push 0
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/* Enter trap */
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TRAP_PROLOG(kids)
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/* Increase EIP so we skip the INT3 */
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//inc dword ptr [ebp+KTRAP_FRAME_EIP]
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/* Call debug service dispatcher */
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mov eax, [ebp+KTRAP_FRAME_EAX]
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mov ecx, [ebp+KTRAP_FRAME_ECX]
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mov edx, [ebp+KTRAP_FRAME_EAX]
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/* Check for V86 mode */
|
||||
test dword ptr [ebp+KTRAP_FRAME_EFLAGS], EFLAGS_V86_MASK
|
||||
jnz NotUserMode
|
||||
|
||||
/* Check if this is kernel or user-mode */
|
||||
test byte ptr [ebp+KTRAP_FRAME_CS], 1
|
||||
jz CallDispatch
|
||||
cmp word ptr [ebp+KTRAP_FRAME_CS], KGDT_R3_CODE + RPL_MASK
|
||||
jnz NotUserMode
|
||||
|
||||
/* Re-enable interrupts */
|
||||
VdmProc:
|
||||
sti
|
||||
|
||||
/* Call the debug routine */
|
||||
CallDispatch:
|
||||
mov esi, ecx
|
||||
mov edi, edx
|
||||
mov edx, eax
|
||||
mov ecx, 3
|
||||
push edi
|
||||
push esi
|
||||
push edx
|
||||
call _KdpServiceDispatcher@12
|
||||
|
||||
NotUserMode:
|
||||
|
||||
/* Get the current process */
|
||||
mov ebx, [fs:KPCR_CURRENT_THREAD]
|
||||
mov ebx, [ebx+KTHREAD_APCSTATE_PROCESS]
|
||||
|
||||
/* Check if this is a VDM Process */
|
||||
//cmp dword ptr [ebx+KPROCESS_VDM_OBJECTS], 0
|
||||
//jz VdmProc
|
||||
|
||||
/* Exit through common routine */
|
||||
jmp _Kei386EoiHelper@0
|
||||
|
||||
_NtRaiseException@12:
|
||||
|
||||
/* NOTE: We -must- be called by Zw* to have the right frame! */
|
||||
/* Push the stack frame */
|
||||
push ebp
|
||||
|
||||
/* Get the current thread and restore its trap frame */
|
||||
mov ebx, [fs:KPCR_CURRENT_THREAD]
|
||||
mov edx, [ebp+KTRAP_FRAME_EDX]
|
||||
mov [ebx+KTHREAD_TRAP_FRAME], edx
|
||||
|
||||
/* Set up stack frame */
|
||||
mov ebp, esp
|
||||
|
||||
/* Get the Trap Frame in EBX */
|
||||
mov ebx, [ebp+0]
|
||||
|
||||
/* Get the exception list and restore */
|
||||
mov eax, [ebx+KTRAP_FRAME_EXCEPTION_LIST]
|
||||
mov [fs:KPCR_EXCEPTION_LIST], eax
|
||||
|
||||
/* Get the parameters */
|
||||
mov edx, [ebp+16] /* Search frames */
|
||||
mov ecx, [ebp+12] /* Context */
|
||||
mov eax, [ebp+8] /* Exception Record */
|
||||
|
||||
/* Raise the exception */
|
||||
push edx
|
||||
push ebx
|
||||
push 0
|
||||
push ecx
|
||||
push eax
|
||||
call _KiRaiseException@20
|
||||
|
||||
/* Restore trap frame in EBP */
|
||||
pop ebp
|
||||
mov esp, ebp
|
||||
|
||||
/* Check the result */
|
||||
or eax, eax
|
||||
jz _KiServiceExit2
|
||||
|
||||
/* Restore debug registers too */
|
||||
jmp _KiServiceExit
|
||||
|
||||
_NtContinue@8:
|
||||
|
||||
/* NOTE: We -must- be called by Zw* to have the right frame! */
|
||||
/* Push the stack frame */
|
||||
push ebp
|
||||
|
||||
/* Get the current thread and restore its trap frame */
|
||||
mov ebx, [fs:KPCR_CURRENT_THREAD]
|
||||
mov edx, [ebp+KTRAP_FRAME_EDX]
|
||||
mov [ebx+KTHREAD_TRAP_FRAME], edx
|
||||
|
||||
/* Set up stack frame */
|
||||
mov ebp, esp
|
||||
|
||||
/* Save the parameters */
|
||||
mov eax, [ebp+0]
|
||||
mov ecx, [ebp+8]
|
||||
|
||||
/* Call KiContinue */
|
||||
push eax
|
||||
push 0
|
||||
push ecx
|
||||
call _KiContinue@12
|
||||
|
||||
/* Check if we failed (bad context record) */
|
||||
or eax, eax
|
||||
jnz Error
|
||||
|
||||
/* Check if test alert was requested */
|
||||
cmp dword ptr [ebp+12], 0
|
||||
je DontTest
|
||||
|
||||
/* Test alert for the thread */
|
||||
mov al, [ebx+KTHREAD_PREVIOUS_MODE]
|
||||
push eax
|
||||
call _KeTestAlertThread@4
|
||||
|
||||
DontTest:
|
||||
/* Return to previous context */
|
||||
pop ebp
|
||||
mov esp, ebp
|
||||
jmp _KiServiceExit2
|
||||
|
||||
Error:
|
||||
pop ebp
|
||||
mov esp, ebp
|
||||
jmp _KiServiceExit
|
||||
|
||||
|
|
@ -1,31 +1,625 @@
|
|||
/*
|
||||
* PROJECT: ReactOS kernel
|
||||
* FILE: ntoskrnl/ke/i386/trap.s
|
||||
* PURPOSE: Exception handlers
|
||||
* PROGRAMMERS: Alex Ionescu (alex@relsoft.net)
|
||||
* FILE: ntoskrnl/ke/i386/trap.S
|
||||
* COPYRIGHT: See COPYING in the top level directory
|
||||
* PURPOSE: System Traps, Entrypoints and Exitpoints
|
||||
* PROGRAMMER: Alex Ionescu (alex@relsoft.net)
|
||||
* NOTE: See asmmacro.S for the shared entry/exit code.
|
||||
*/
|
||||
|
||||
/* INCLUDES ******************************************************************/
|
||||
|
||||
#include <asm.h>
|
||||
#include <internal/i386/asmmacro.S>
|
||||
.intel_syntax noprefix
|
||||
|
||||
/* NOTES:
|
||||
* Why not share the epilogue?
|
||||
* 1) An extra jmp is expensive (jmps are very costly)
|
||||
* 2) Eventually V86 exit should be handled through ABIOS, and we
|
||||
* handle ABIOS exit in the shared trap exit code already.
|
||||
* Why not share the KiTrapHandler call?
|
||||
* 1) Would make using the trap-prolog macro much harder.
|
||||
* 2) Eventually some of these traps might be re-implemented in assembly
|
||||
* to improve speed and depend less on the compiler and/or use features
|
||||
* not present as C keywords. When that happens, less traps will use the
|
||||
* shared C handler, so the shared-code would need to be un-shared.
|
||||
*/
|
||||
/*
|
||||
* FIXMEs:
|
||||
* - Figure out why ES/DS gets messed up in VMWare, when doing KiServiceExit only,
|
||||
* and only when called from user-mode, and returning to user-mode.
|
||||
* - Use MmProbe when copying arguments to syscall.
|
||||
* - Handle failure after PsConvertToGuiThread.
|
||||
* - Figure out what the DEBUGEIP hack is for and how it can be moved away.
|
||||
* - Add DR macro/save and VM macro/save.
|
||||
* - Add .func .endfunc to everything that doesn't have it yet.
|
||||
* - Implement KiCallbackReturn, KiGetTickCount, KiRaiseAssertion.
|
||||
*/
|
||||
|
||||
/* FUNCTIONS *****************************************************************/
|
||||
/* GLOBALS ******************************************************************/
|
||||
|
||||
/* This is the Software Interrupt Table that we handle in this file: */
|
||||
.globl _KiTrap0 /* INT 0: Divide Error (#DE) */
|
||||
.globl _KiTrap1 /* INT 1: Debug Exception (#DB) */
|
||||
.globl _KiTrap2 /* INT 2: NMI Interrupt */
|
||||
.globl _KiTrap3 /* INT 3: Breakpoint Exception (#BP) */
|
||||
.globl _KiTrap4 /* INT 4: Overflow Exception (#OF) */
|
||||
.globl _KiTrap5 /* INT 5: BOUND Range Exceeded (#BR) */
|
||||
.globl _KiTrap6 /* INT 6: Invalid Opcode Code (#UD) */
|
||||
.globl _KiTrap7 /* INT 7: Device Not Available (#NM) */
|
||||
.globl _KiTrap8 /* INT 8: Double Fault Exception (#DF) */
|
||||
.globl _KiTrap9 /* INT 9: RESERVED */
|
||||
.globl _KiTrap10 /* INT 10: Invalid TSS Exception (#TS) */
|
||||
.globl _KiTrap11 /* INT 11: Segment Not Present (#NP) */
|
||||
.globl _KiTrap12 /* INT 12: Stack Fault Exception (#SS) */
|
||||
.globl _KiTrap13 /* INT 13: General Protection (#GP) */
|
||||
.globl _KiTrap14 /* INT 14: Page-Fault Exception (#PF) */
|
||||
.globl _KiTrap15 /* INT 15: RESERVED */
|
||||
.globl _KiTrap16 /* INT 16: x87 FPU Error (#MF) */
|
||||
.globl _KiTrap17 /* INT 17: Align Check Exception (#AC) */
|
||||
.globl _KiTrap18 /* INT 18: Machine Check Exception (#MC)*/
|
||||
.globl _KiTrap19 /* INT 19: SIMD FPU Exception (#XF) */
|
||||
.globl _KiTrapUnknown /* INT 20-30: UNDEFINED INTERRUPTS */
|
||||
.globl _KiDebugService /* INT 31: Get Tick Count Handler */
|
||||
.globl _KiCallbackReturn /* INT 32: User-Mode Callback Return */
|
||||
.globl _KiRaiseAssertion /* INT 33: Debug Assertion Handler */
|
||||
.globl _KiDebugService /* INT 34: Debug Service Handler */
|
||||
.globl _KiSystemService /* INT 35: System Call Service Handler */
|
||||
|
||||
/* We also handle LSTAR Entry */
|
||||
.globl _KiFastCallEntry
|
||||
|
||||
/* And special system-defined software traps */
|
||||
.globl _NtRaiseException@12
|
||||
.globl _NtContinue@8
|
||||
|
||||
/* We implement the following trap exit points: */
|
||||
.globl _KiServiceExit /* Exit from syscall */
|
||||
.globl _KiServiceExit2 /* Exit from syscall with complete frame*/
|
||||
.globl _Kei386EoiHelper@0 /* Exit from interrupt or H/W trap */
|
||||
|
||||
/* FUNCTIONS ****************************************************************/
|
||||
|
||||
.func KiSystemService
|
||||
_KiSystemService:
|
||||
|
||||
/* Enter the shared system call prolog */
|
||||
SYSCALL_PROLOG
|
||||
|
||||
/* Jump to the actual handler */
|
||||
jmp SharedCode
|
||||
.endfunc
|
||||
|
||||
.func KiFastCallEntry
|
||||
_KiFastCallEntry:
|
||||
|
||||
/* Set FS to PCR */
|
||||
mov ecx, KGDT_R0_PCR
|
||||
mov fs, cx
|
||||
|
||||
/* Set DS/ES to Kernel Selector */
|
||||
mov ecx, KGDT_R0_DATA
|
||||
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
|
||||
|
||||
/* Hack: it seems that on VMWare someone damages ES/DS on exit. Investigate! */
|
||||
mov dword ptr [esp+KTRAP_FRAME_DS], KGDT_R3_DATA + RPL_MASK
|
||||
mov dword ptr [esp+KTRAP_FRAME_ES], KGDT_R3_DATA + RPL_MASK
|
||||
|
||||
/* 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
|
||||
|
||||
#ifdef DBG // FIXME: Is this for GDB? Can it be moved in the stub?
|
||||
/*
|
||||
* We want to know the address from where the syscall stub was called.
|
||||
* If PrevMode is KernelMode, that address is stored in our own (kernel)
|
||||
* stack, at location KTRAP_FRAME_ESP.
|
||||
* If we're coming from UserMode, we load the usermode stack pointer
|
||||
* and go back two frames (first frame is the syscall stub, second call
|
||||
* is the caller of the stub).
|
||||
*/
|
||||
mov edi, [ebp+KTRAP_FRAME_ESP]
|
||||
test byte ptr [esi+KTHREAD_PREVIOUS_MODE], 0x01
|
||||
jz PrevWasKernelMode
|
||||
mov edi, [edi+4]
|
||||
PrevWasKernelMode:
|
||||
mov [ebp+KTRAP_FRAME_DEBUGEIP], edi
|
||||
#endif
|
||||
|
||||
/* Enable interrupts */
|
||||
sti
|
||||
|
||||
SharedCode:
|
||||
|
||||
/*
|
||||
* Find out which table offset to use. Converts 0x1124 into 0x10.
|
||||
* The offset is related to the Table Index as such: Offset = TableIndex x 10
|
||||
*/
|
||||
mov edi, eax
|
||||
shr edi, SERVICE_TABLE_SHIFT
|
||||
and edi, SERVICE_TABLE_MASK
|
||||
mov ecx, edi
|
||||
|
||||
/* Now add the thread's base system table to the offset */
|
||||
add edi, [esi+KTHREAD_SERVICE_TABLE]
|
||||
|
||||
/* Get the true syscall ID and check it */
|
||||
mov ebx, eax
|
||||
and eax, SERVICE_NUMBER_MASK
|
||||
cmp eax, [edi+SERVICE_DESCRIPTOR_LIMIT]
|
||||
|
||||
/* Invalid ID, try to load Win32K Table */
|
||||
jnb KiBBTUnexpectedRange
|
||||
|
||||
#if 0 // <== Disabled for two reasons: We don't save TEB in 0x18, but KPCR.
|
||||
// <== We don't have a KeGdiFlushUserBatch callback yet (needs to be
|
||||
// sent through the PsInitializeWin32Callouts structure)
|
||||
/* Check if this was Win32K */
|
||||
cmp ecx, SERVICE_TABLE_TEST
|
||||
jnz NotWin32K
|
||||
|
||||
/* Get the TEB */
|
||||
mov ecx, [fs:KPCR_TEB]
|
||||
|
||||
/* Check if we should flush the User Batch */
|
||||
xor ebx, ebx
|
||||
or ebx, [ecx+TEB_GDI_BATCH_COUNT]
|
||||
jz NoWin32K
|
||||
|
||||
/* Flush it */
|
||||
push edx
|
||||
push eax
|
||||
call [_KeGdiFlushUserBatch]
|
||||
pop eax
|
||||
pop edx
|
||||
#endif
|
||||
|
||||
NotWin32K:
|
||||
/* Increase total syscall count */
|
||||
inc dword ptr fs:[KPCR_SYSTEM_CALLS]
|
||||
|
||||
#ifdef DBG
|
||||
/* Increase per-syscall count */
|
||||
mov ecx, [edi+SERVICE_DESCRIPTOR_COUNT]
|
||||
jecxz NoCountTable
|
||||
inc dword ptr [ecx+eax*4]
|
||||
#endif
|
||||
|
||||
/* Users's current stack frame pointer is source */
|
||||
NoCountTable:
|
||||
mov esi, edx
|
||||
|
||||
/* Allocate room for argument list from kernel stack */
|
||||
mov ebx, [edi+SERVICE_DESCRIPTOR_NUMBER]
|
||||
xor ecx, ecx
|
||||
mov cl, [eax+ebx]
|
||||
|
||||
/* Get pointer to function */
|
||||
mov edi, [edi+SERVICE_DESCRIPTOR_BASE]
|
||||
mov ebx, [edi+eax*4]
|
||||
|
||||
/* Allocate space on our stack */
|
||||
sub esp, ecx
|
||||
|
||||
/*
|
||||
* Copy the arguments from the user stack to our stack
|
||||
* FIXME: This needs to be probed with MmSystemRangeStart
|
||||
*/
|
||||
shr ecx, 2
|
||||
mov edi, esp
|
||||
rep movsd
|
||||
|
||||
#ifdef DBG
|
||||
|
||||
/* Make sure this isn't a user-mode call at elevated IRQL */
|
||||
test byte ptr [ebp+KTRAP_FRAME_CS], MODE_MASK
|
||||
jz SkipCheck
|
||||
call _KeGetCurrentIrql@0
|
||||
or al, al
|
||||
jnz InvalidIrql
|
||||
|
||||
/*
|
||||
* The following lines are for the benefit of GDB. It will see the return
|
||||
* address of the "call ebx" below, find the last label before it and
|
||||
* thinks that that's the start of the function. It will then check to see
|
||||
* if it starts with a standard function prolog (push ebp, mov ebp,esp).
|
||||
* When that standard function prolog is not found, it will stop the
|
||||
* stack backtrace. Since we do want to backtrace into usermode, let's
|
||||
* make GDB happy and create a standard prolog.
|
||||
*/
|
||||
SkipCheck:
|
||||
KiSystemService:
|
||||
push ebp
|
||||
mov ebp,esp
|
||||
pop ebp
|
||||
#endif
|
||||
|
||||
/* Do the System Call */
|
||||
call ebx
|
||||
|
||||
#ifdef DBG
|
||||
/* Make sure the user-mode call didn't return at elevated IRQL */
|
||||
test byte ptr [ebp+KTRAP_FRAME_CS], MODE_MASK
|
||||
jz SkipCheck2
|
||||
mov esi, eax /* We need to save the syscall's return val */
|
||||
call _KeGetCurrentIrql@0
|
||||
or al, al
|
||||
jnz InvalidIrql
|
||||
mov eax, esi /* Restore it */
|
||||
|
||||
/* Get our temporary current thread pointer for sanity check */
|
||||
mov ecx, fs:[KPCR_CURRENT_THREAD]
|
||||
|
||||
/* Make sure that we are not attached and that APCs are not disabled */
|
||||
mov dl, [ecx+KTHREAD_APC_STATE_INDEX]
|
||||
or dl, dl
|
||||
jnz InvalidIndex
|
||||
mov edx, [ecx+KTHREAD_COMBINED_APC_DISABLE]
|
||||
or edx, edx
|
||||
jnz InvalidIndex
|
||||
#endif
|
||||
|
||||
SkipCheck2:
|
||||
|
||||
/* Deallocate the kernel stack frame */
|
||||
mov esp, ebp
|
||||
|
||||
KeReturnFromSystemCall:
|
||||
|
||||
/* Get the Current Thread */
|
||||
mov ecx, [fs:KPCR_CURRENT_THREAD]
|
||||
|
||||
/* Restore the old trap frame pointer */
|
||||
mov edx, [ebp+KTRAP_FRAME_EDX]
|
||||
mov [ecx+KTHREAD_TRAP_FRAME], edx
|
||||
.endfunc
|
||||
|
||||
.func KiServiceExit
|
||||
_KiServiceExit:
|
||||
/* Disable interrupts */
|
||||
cli
|
||||
|
||||
/* Check for, and deliver, User-Mode APCs if needed */
|
||||
CHECK_FOR_APC_DELIVER 1
|
||||
|
||||
/* Hack for VMWare: Sometimes ES/DS seem to be invalid when returning to user-mode. Investigate! */
|
||||
mov es, [ebp+KTRAP_FRAME_ES]
|
||||
mov ds, [ebp+KTRAP_FRAME_DS]
|
||||
|
||||
/* Exit and cleanup */
|
||||
TRAP_EPILOG FromSystemCall, DoRestorePreviousMode, DoNotRestoreSegments, DoNotRestoreVolatiles, DoRestoreEverything
|
||||
.endfunc
|
||||
|
||||
KiBBTUnexpectedRange:
|
||||
|
||||
/* If this isn't a Win32K call, fail */
|
||||
cmp ecx, 0x10
|
||||
jne InvalidCall
|
||||
|
||||
/* Set up Win32K Table */
|
||||
push edx
|
||||
push ebx
|
||||
call _PsConvertToGuiThread@0
|
||||
|
||||
/* FIXME: Handle failure */
|
||||
pop eax
|
||||
pop edx
|
||||
|
||||
/* Reset trap frame address */
|
||||
mov ebp, esp
|
||||
mov [esi+KTHREAD_TRAP_FRAME], ebp
|
||||
|
||||
/* Try the Call again */
|
||||
jmp SharedCode
|
||||
|
||||
InvalidCall:
|
||||
|
||||
/* Invalid System Call */
|
||||
mov eax, STATUS_INVALID_SYSTEM_SERVICE
|
||||
jmp KeReturnFromSystemCall
|
||||
|
||||
BadStack:
|
||||
|
||||
/* Restore ESP0 stack */
|
||||
mov ecx, [fs:KPCR_TSS]
|
||||
mov esp, ss:[ecx+KTSS_ESP0]
|
||||
|
||||
/* Generate V86M Stack for Trap 6 */
|
||||
push 0
|
||||
push 0
|
||||
push 0
|
||||
push 0
|
||||
|
||||
/* Generate interrupt stack for Trap 6 */
|
||||
push KGDT_R3_DATA + RPL_MASK
|
||||
push 0
|
||||
push 0x20202
|
||||
push KGDT_R3_CODE + RPL_MASK
|
||||
push 0
|
||||
jmp _KiTrap6
|
||||
|
||||
#ifdef DBG
|
||||
InvalidIrql:
|
||||
/* Save current IRQL */
|
||||
push fs:[KPCR_IRQL]
|
||||
|
||||
/* Set us at passive */
|
||||
mov dword ptr fs:[KPCR_IRQL], 0
|
||||
cli
|
||||
|
||||
/* Bugcheck */
|
||||
push 0
|
||||
push 0
|
||||
push eax
|
||||
push ebx
|
||||
push IRQL_GT_ZERO_AT_SYSTEM_SERVICE
|
||||
call _KeBugCheckEx@20
|
||||
|
||||
InvalidIndex:
|
||||
|
||||
/* Get the index and APC state */
|
||||
movzx eax, byte ptr [ecx+KTHREAD_APC_STATE_INDEX]
|
||||
mov edx, [ecx+KTHREAD_COMBINED_APC_DISABLE]
|
||||
|
||||
/* Bugcheck */
|
||||
push 0
|
||||
push edx
|
||||
push eax
|
||||
push ebx
|
||||
push APC_INDEX_MISMATCH
|
||||
call _KeBugCheckEx@20
|
||||
ret
|
||||
#endif
|
||||
|
||||
.func KiServiceExit2
|
||||
_KiServiceExit2:
|
||||
|
||||
/* Disable interrupts */
|
||||
cli
|
||||
|
||||
/* Check for, and deliver, User-Mode APCs if needed */
|
||||
CHECK_FOR_APC_DELIVER 0
|
||||
|
||||
/* Exit and cleanup */
|
||||
TRAP_EPILOG NotFromSystemCall, DoRestorePreviousMode, DoRestoreSegments, DoRestoreVolatiles, DoNotRestoreEverything
|
||||
.endfunc
|
||||
|
||||
.func Kei386EoiHelper@0
|
||||
_Kei386EoiHelper@0:
|
||||
|
||||
/* Disable interrupts */
|
||||
cli
|
||||
|
||||
/* Check for, and deliver, User-Mode APCs if needed */
|
||||
CHECK_FOR_APC_DELIVER 0
|
||||
|
||||
/* Exit and cleanup */
|
||||
TRAP_EPILOG NotFromSystemCall, DoNotRestorePreviousMode, DoRestoreSegments, DoRestoreVolatiles, DoNotRestoreEverything
|
||||
.endfunc
|
||||
|
||||
V86_Exit:
|
||||
/* Move to EDX position */
|
||||
add esp, KTRAP_FRAME_EDX
|
||||
|
||||
/* Restore volatiles */
|
||||
pop edx
|
||||
pop ecx
|
||||
pop eax
|
||||
|
||||
/* Move to non-volatiles */
|
||||
lea esp, [ebp+KTRAP_FRAME_EDI]
|
||||
pop edi
|
||||
pop esi
|
||||
pop ebx
|
||||
pop ebp
|
||||
|
||||
/* Skip error code and return */
|
||||
add esp, 4
|
||||
iret
|
||||
|
||||
AbiosExit:
|
||||
/* Not yet supported */
|
||||
int 3
|
||||
|
||||
_KiDebugService:
|
||||
|
||||
/* Push error code */
|
||||
push 0
|
||||
|
||||
/* Enter trap */
|
||||
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]
|
||||
|
||||
/* Check for V86 mode */
|
||||
test dword ptr [ebp+KTRAP_FRAME_EFLAGS], EFLAGS_V86_MASK
|
||||
jnz NotUserMode
|
||||
|
||||
/* Check if this is kernel or user-mode */
|
||||
test byte ptr [ebp+KTRAP_FRAME_CS], 1
|
||||
jz CallDispatch
|
||||
cmp word ptr [ebp+KTRAP_FRAME_CS], KGDT_R3_CODE + RPL_MASK
|
||||
jnz NotUserMode
|
||||
|
||||
/* Re-enable interrupts */
|
||||
VdmProc:
|
||||
sti
|
||||
|
||||
/* Call the debug routine */
|
||||
CallDispatch:
|
||||
mov esi, ecx
|
||||
mov edi, edx
|
||||
mov edx, eax
|
||||
mov ecx, 3
|
||||
push edi
|
||||
push esi
|
||||
push edx
|
||||
call _KdpServiceDispatcher@12
|
||||
|
||||
NotUserMode:
|
||||
|
||||
/* Get the current process */
|
||||
mov ebx, [fs:KPCR_CURRENT_THREAD]
|
||||
mov ebx, [ebx+KTHREAD_APCSTATE_PROCESS]
|
||||
|
||||
/* Check if this is a VDM Process */
|
||||
//cmp dword ptr [ebx+KPROCESS_VDM_OBJECTS], 0
|
||||
//jz VdmProc
|
||||
|
||||
/* Exit through common routine */
|
||||
jmp _Kei386EoiHelper@0
|
||||
|
||||
_NtRaiseException@12:
|
||||
|
||||
/* NOTE: We -must- be called by Zw* to have the right frame! */
|
||||
/* Push the stack frame */
|
||||
push ebp
|
||||
|
||||
/* Get the current thread and restore its trap frame */
|
||||
mov ebx, [fs:KPCR_CURRENT_THREAD]
|
||||
mov edx, [ebp+KTRAP_FRAME_EDX]
|
||||
mov [ebx+KTHREAD_TRAP_FRAME], edx
|
||||
|
||||
/* Set up stack frame */
|
||||
mov ebp, esp
|
||||
|
||||
/* Get the Trap Frame in EBX */
|
||||
mov ebx, [ebp+0]
|
||||
|
||||
/* Get the exception list and restore */
|
||||
mov eax, [ebx+KTRAP_FRAME_EXCEPTION_LIST]
|
||||
mov [fs:KPCR_EXCEPTION_LIST], eax
|
||||
|
||||
/* Get the parameters */
|
||||
mov edx, [ebp+16] /* Search frames */
|
||||
mov ecx, [ebp+12] /* Context */
|
||||
mov eax, [ebp+8] /* Exception Record */
|
||||
|
||||
/* Raise the exception */
|
||||
push edx
|
||||
push ebx
|
||||
push 0
|
||||
push ecx
|
||||
push eax
|
||||
call _KiRaiseException@20
|
||||
|
||||
/* Restore trap frame in EBP */
|
||||
pop ebp
|
||||
mov esp, ebp
|
||||
|
||||
/* Check the result */
|
||||
or eax, eax
|
||||
jz _KiServiceExit2
|
||||
|
||||
/* Restore debug registers too */
|
||||
jmp _KiServiceExit
|
||||
|
||||
_NtContinue@8:
|
||||
|
||||
/* NOTE: We -must- be called by Zw* to have the right frame! */
|
||||
/* Push the stack frame */
|
||||
push ebp
|
||||
|
||||
/* Get the current thread and restore its trap frame */
|
||||
mov ebx, [fs:KPCR_CURRENT_THREAD]
|
||||
mov edx, [ebp+KTRAP_FRAME_EDX]
|
||||
mov [ebx+KTHREAD_TRAP_FRAME], edx
|
||||
|
||||
/* Set up stack frame */
|
||||
mov ebp, esp
|
||||
|
||||
/* Save the parameters */
|
||||
mov eax, [ebp+0]
|
||||
mov ecx, [ebp+8]
|
||||
|
||||
/* Call KiContinue */
|
||||
push eax
|
||||
push 0
|
||||
push ecx
|
||||
call _KiContinue@12
|
||||
|
||||
/* Check if we failed (bad context record) */
|
||||
or eax, eax
|
||||
jnz Error
|
||||
|
||||
/* Check if test alert was requested */
|
||||
cmp dword ptr [ebp+12], 0
|
||||
je DontTest
|
||||
|
||||
/* Test alert for the thread */
|
||||
mov al, [ebx+KTHREAD_PREVIOUS_MODE]
|
||||
push eax
|
||||
call _KeTestAlertThread@4
|
||||
|
||||
DontTest:
|
||||
/* Return to previous context */
|
||||
pop ebp
|
||||
mov esp, ebp
|
||||
jmp _KiServiceExit2
|
||||
|
||||
Error:
|
||||
pop ebp
|
||||
mov esp, ebp
|
||||
jmp _KiServiceExit
|
||||
|
||||
.globl _KiTrap0
|
||||
_KiTrap0:
|
||||
/* Push error code */
|
||||
push 0
|
||||
|
|
@ -46,7 +640,6 @@ _KiTrap0:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrap1
|
||||
_KiTrap1:
|
||||
/* Push error code */
|
||||
push 0
|
||||
|
|
@ -67,7 +660,6 @@ _KiTrap1:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrap2
|
||||
_KiTrap2:
|
||||
/* Push error code */
|
||||
push 0
|
||||
|
|
@ -88,7 +680,6 @@ _KiTrap2:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrap3
|
||||
_KiTrap3:
|
||||
/* Push error code */
|
||||
push 0
|
||||
|
|
@ -109,7 +700,6 @@ _KiTrap3:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrap4
|
||||
_KiTrap4:
|
||||
/* Push error code */
|
||||
push 0
|
||||
|
|
@ -130,7 +720,6 @@ _KiTrap4:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrap5
|
||||
_KiTrap5:
|
||||
/* Push error code */
|
||||
push 0
|
||||
|
|
@ -151,7 +740,6 @@ _KiTrap5:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrap6
|
||||
_KiTrap6:
|
||||
/* Push error code */
|
||||
push 0
|
||||
|
|
@ -172,7 +760,6 @@ _KiTrap6:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrap7
|
||||
_KiTrap7:
|
||||
/* Push error code */
|
||||
push 0
|
||||
|
|
@ -193,12 +780,10 @@ _KiTrap7:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrap8
|
||||
_KiTrap8:
|
||||
call _KiDoubleFaultHandler
|
||||
iret
|
||||
|
||||
.globl _KiTrap9
|
||||
_KiTrap9:
|
||||
/* Push error code */
|
||||
push 0
|
||||
|
|
@ -219,7 +804,6 @@ _KiTrap9:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrap10
|
||||
_KiTrap10:
|
||||
/* Enter trap */
|
||||
TRAP_PROLOG(10)
|
||||
|
|
@ -237,7 +821,6 @@ _KiTrap10:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrap11
|
||||
_KiTrap11:
|
||||
/* Enter trap */
|
||||
TRAP_PROLOG(11)
|
||||
|
|
@ -255,7 +838,6 @@ _KiTrap11:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrap12
|
||||
_KiTrap12:
|
||||
/* Enter trap */
|
||||
TRAP_PROLOG(12)
|
||||
|
|
@ -273,7 +855,6 @@ _KiTrap12:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrap13
|
||||
_KiTrap13:
|
||||
/* Enter trap */
|
||||
TRAP_PROLOG(13)
|
||||
|
|
@ -291,7 +872,6 @@ _KiTrap13:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrap14
|
||||
_KiTrap14:
|
||||
/* Enter trap */
|
||||
TRAP_PROLOG(14)
|
||||
|
|
@ -309,7 +889,6 @@ _KiTrap14:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrap15
|
||||
_KiTrap15:
|
||||
/* Push error code */
|
||||
push 0
|
||||
|
|
@ -330,7 +909,6 @@ _KiTrap15:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrap16
|
||||
_KiTrap16:
|
||||
/* Push error code */
|
||||
push 0
|
||||
|
|
@ -351,7 +929,6 @@ _KiTrap16:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrap17
|
||||
_KiTrap17:
|
||||
/* Push error code */
|
||||
push 0
|
||||
|
|
@ -372,7 +949,6 @@ _KiTrap17:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrap18
|
||||
_KiTrap18:
|
||||
/* Push error code */
|
||||
push 0
|
||||
|
|
@ -393,7 +969,6 @@ _KiTrap18:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrap19
|
||||
_KiTrap19:
|
||||
/* Push error code */
|
||||
push 0
|
||||
|
|
@ -414,7 +989,6 @@ _KiTrap19:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiTrapUnknown
|
||||
_KiTrapUnknown:
|
||||
/* Push error code */
|
||||
push 0
|
||||
|
|
@ -429,58 +1003,3 @@ _KiTrapUnknown:
|
|||
jne _Kei386EoiHelper@0
|
||||
jmp _KiV86Complete
|
||||
|
||||
.globl _KiCoprocessorError@0
|
||||
_KiCoprocessorError@0:
|
||||
|
||||
/* Get the NPX Thread's Initial stack */
|
||||
mov eax, [fs:KPCR_NPX_THREAD]
|
||||
mov eax, [eax+KTHREAD_INITIAL_STACK]
|
||||
|
||||
/* Make space for the FPU Save area */
|
||||
sub eax, SIZEOF_FX_SAVE_AREA
|
||||
|
||||
/* Set the CR0 State */
|
||||
mov dword ptr [eax+FN_CR0_NPX_STATE], 8
|
||||
|
||||
/* Update it */
|
||||
mov eax, cr0
|
||||
or eax, 8
|
||||
mov cr0, eax
|
||||
|
||||
/* Return to caller */
|
||||
ret
|
||||
|
||||
.globl _Ki386AdjustEsp0@4
|
||||
_Ki386AdjustEsp0@4:
|
||||
|
||||
/* Get the current thread */
|
||||
mov eax, [fs:KPCR_CURRENT_THREAD]
|
||||
|
||||
/* Get trap frame and stack */
|
||||
mov edx, [esp+4]
|
||||
mov eax, [eax+KTHREAD_INITIAL_STACK]
|
||||
|
||||
/* Check if V86 */
|
||||
test dword ptr [edx+KTRAP_FRAME_EFLAGS], EFLAGS_V86_MASK
|
||||
jnz NoAdjust
|
||||
|
||||
/* Bias the stack */
|
||||
sub eax, KTRAP_FRAME_V86_GS - KTRAP_FRAME_SS
|
||||
|
||||
NoAdjust:
|
||||
/* Skip FX Save Area */
|
||||
sub eax, SIZEOF_FX_SAVE_AREA
|
||||
|
||||
/* Disable interrupts */
|
||||
pushf
|
||||
cli
|
||||
|
||||
/* Adjust ESP0 */
|
||||
mov edx, [fs:KPCR_TSS]
|
||||
mov ss:[edx+KTSS_ESP0], eax
|
||||
|
||||
/* Enable interrupts and return */
|
||||
popf
|
||||
ret 4
|
||||
|
||||
/* EOF */
|
||||
|
|
|
|||
|
|
@ -35,7 +35,6 @@
|
|||
<file>irqhand.s</file>
|
||||
<file>kernel.c</file>
|
||||
<file>ldt.c</file>
|
||||
<file>syscall.S</file>
|
||||
<file>thread.c</file>
|
||||
<file>trap.s</file>
|
||||
<file>tss.c</file>
|
||||
|
|
|
|||
Loading…
Reference in a new issue