[ros-diffs] [ion] 20933: * Add more documented flags from ks386.inc to asm.h

ion at svn.reactos.org ion at svn.reactos.org
Tue Jan 17 06:05:48 CET 2006


* Add more documented flags from ks386.inc to asm.h
* Isolate and clean-up the VMWare hack; the shared trap exit macro can
now be implemented.
Modified: trunk/reactos/include/ndk/asm.h
Modified: trunk/reactos/ntoskrnl/ke/i386/syscall.S
Modified: trunk/reactos/ntoskrnl/ke/i386/usercall_asm.S
  _____  

Modified: trunk/reactos/include/ndk/asm.h
--- trunk/reactos/include/ndk/asm.h	2006-01-17 03:28:33 UTC (rev
20932)
+++ trunk/reactos/include/ndk/asm.h	2006-01-17 05:05:35 UTC (rev
20933)
@@ -354,10 +354,13 @@

 #define CBSTACK_RESULT_LENGTH                   0x24
 
 //
-// NTSTATUS Codes
+// NTSTATUS and Bugcheck Codes
 //
 #ifdef __ASM__
 #define STATUS_INVALID_SYSTEM_SERVICE           0xC000001C
+#define STATUS_NO_CALLBACK_ACTIVE               0xC0000258
+#define APC_INDEX_MISMATCH                      1
+#define IRQL_GT_ZERO_AT_SYSTEM_SERVICE          0x4A
 #endif
 
 //
  _____  

Modified: trunk/reactos/ntoskrnl/ke/i386/syscall.S
--- trunk/reactos/ntoskrnl/ke/i386/syscall.S	2006-01-17 03:28:33 UTC
(rev 20932)
+++ trunk/reactos/ntoskrnl/ke/i386/syscall.S	2006-01-17 05:05:35 UTC
(rev 20933)
@@ -7,8 +7,6 @@

 
 #include <asm.h>
 #include <internal/i386/asmmacro.S>
-#define APC_INDEX_MISMATCH 1
-#define IRQL_GT_ZERO_AT_SYSTEM_SERVICE 0x4A
 
 .globl _KiServiceExit
 .globl _KiServiceExit2
@@ -18,7 +16,7 @@
 .intel_syntax noprefix
 
 /*
- * There are 3 main types of Trap Entries:
+ * There are 3 main types of Trap Entries: <= Move this to asmmacro.S
  *
  * - System Calls
  *     - TODO
@@ -31,7 +29,7 @@
  */
  
 /*
- * There are 3 main types of Trap Exits:
+ * There are 3 main types of Trap Exits: <= Correct some things and
move to asmmacro.S
  *
  * - KiServiceExit
  *     - Clear interrupt flag
@@ -66,17 +64,10 @@
  * All these are exemplified by the 3 trap exits shown above
  */
 
-/*
- * There is also common Debug Code present in the common exit code,
which
- * in turn calls common code to save the debug registers
- */
- 
  /*
   * FIXMEs:
-  *         - Dig in trap code and see why we need to push/pop the
segments,
-  *           which -shouldn't- be needed on syscalls; one of the
things
-  *           missing for this to work is lazy loading in the GPF
handler,
-  *           but there are other things to consider.
+  *         - 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 macros and merge with trap.s nicely
   */
 
@@ -159,15 +150,13 @@
     /* Push previous mode */
     push UserMode
 
-.att_syntax
-    /* Save other registers */
-    sub $0xC, %esp
// + 0x70
-    pushl $KGDT_R3_DATA + RPL_MASK
// + 0x40
-    pushl $KGDT_R3_DATA + RPL_MASK
// + 0x44
-    pushl $0
// + 0x48
-    sub $0x30, %esp
// + 0x70
-.intel_syntax noprefix
+    /* 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
 
@@ -216,16 +205,14 @@
 
     /* Save the old previous mode */
     push ss:[esi+KTHREAD_PREVIOUS_MODE]
-    
-.att_syntax
-    /* Save other registers */
-    sub $0xC, %esp
// + 0x70
-    pushl %ds
// + 0x40
-    pushl %es
// + 0x44
-    pushl %gs
// + 0x48
-    sub $0x30, %esp
// + 0x70
-.intel_syntax noprefix
 
+    /* Skip the other registers */
+    sub esp, 0x48
+
+    /* Hack: it seems that on VMWare someone damages ES/DS on exit.
Investigate! */
+    mov [esp+KTRAP_FRAME_DS], ds
+    mov [esp+KTRAP_FRAME_ES], es
+
     /* Set the new previous mode based on the saved CS selector */
     mov ebx, [esp+0x6C]
     and ebx, 1
@@ -424,6 +411,10 @@
     /* 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]
+
 // ========================= COMMON TRAP EXIT CODE
===================//
 #ifdef DBG
     /* Assert the flags */
@@ -515,14 +506,6 @@
     jz CommonStackClean
 // ==================== END IF FULL RESTORE NEEDED
====================//
 
-//badbadbad 	 
-     add esp, 0x30 	 
-     pop gs 	 
-     pop es 	 
-     pop ds 	 
-     add esp, 0x14 	 
-//badbadbad
-
     /* Restore FS */
 RestoreFs:
     lea esp, [ebp+KTRAP_FRAME_FS]
  _____  

Modified: trunk/reactos/ntoskrnl/ke/i386/usercall_asm.S
--- trunk/reactos/ntoskrnl/ke/i386/usercall_asm.S	2006-01-17
03:28:33 UTC (rev 20932)
+++ trunk/reactos/ntoskrnl/ke/i386/usercall_asm.S	2006-01-17
05:05:35 UTC (rev 20933)
@@ -9,17 +9,9 @@

 /* INCLUDES
******************************************************************/
 
 #include <asm.h>
-//#include <bugcodes.h>
-#define APC_INDEX_MISMATCH 1
-#define IRQL_GT_ZERO_AT_SYSTEM_SERVICE 0x4A
-#define STATUS_NO_CALLBACK_ACTIVE 0xC0000258
+#include <internal/i386/asmmacro.S>
 .intel_syntax noprefix
 
-// This file is a work in progress. Most of the code is currently
disabled.
-
-/* GLOBALS
****************************************************************/
-.extern PVOID _KeUserCallbackDispatcher
-
 /* FUNCTIONS
****************************************************************/
 
 .globl _KiGetUserModeStackAddress at 0
@@ -186,8 +178,7 @@
     lea esi, [edx+KTRAP_FRAME_FS]
     rep movsd
 
-    /* TODO: Ugly hack because of some missing logic in syscall.s */
-    mov dword ptr [esp+KTRAP_FRAME_GS], 0
+    /* VMWARE Hack because ES/DS sometimes gets smashed when returning
to User-Mode. 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
 
@@ -209,12 +200,7 @@
     sti
 
     /* Write the debug data */
-    mov edi, [ebp+KTRAP_FRAME_EBP]
-    mov edx, [ebp+KTRAP_FRAME_EIP]
-    mov [ebp+KTRAP_FRAME_DEBUGPOINTER], edx
-    mov dword ptr [ebp+KTRAP_FRAME_DEBUGARGMARK], 0xBADB0D00
-    mov [ebp+KTRAP_FRAME_DEBUGEBP], ebx
-    mov [ebp+KTRAP_FRAME_DEBUGEIP], edi
+    SET_TF_DEBUG_HEADER
 
     /* Exit to user-mode */
     jmp _KiServiceExit
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