[ros-arm-bringup] 34474: - Write a DebugService routine for ARM in the RTL library and get rid of the hack in ntoskrnl. - Just like on x86, this routine generates a breakpoint -- on ARM this is done with BKPT followed by an index. - We use the BREAKPOINT_PRINT index just like on x86. - This generates a prefetch abort -- so now we implement the prefetch abort handler. Thanks to the trap macros, this was 10 lines of code. - This calls into the real C handler, which is now unimplemented and hangs t

Author: ros-arm-bringup
Date: Sun Jul 13 17:40:36 2008
New Revision: 34474

URL: http://svn.reactos.org/svn/reactos?rev=34474&view=rev
Log:
- Write a DebugService routine for ARM in the RTL library and get rid of the hack in ntoskrnl.
- Just like on x86, this routine generates a breakpoint -- on ARM this is done with BKPT followed by an index.
- We use the BREAKPOINT_PRINT index just like on x86.
- This generates a prefetch abort -- so now we implement the prefetch abort handler. Thanks to the trap macros, this was 10 lines of code.
- This calls into the real C handler, which is now unimplemented and hangs the whole system, so we've regressed way back (on purpose).

Modified:
    trunk/reactos/lib/rtl/arm/debug_asm.S
    trunk/reactos/ntoskrnl/include/internal/arm/ksarm.h
    trunk/reactos/ntoskrnl/ke/arm/kiinit.c
    trunk/reactos/ntoskrnl/ke/arm/trap.s
    trunk/reactos/ntoskrnl/ke/arm/trapc.c

Modified: trunk/reactos/lib/rtl/arm/debug_asm.S
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/lib/rtl/arm/debug_asm.S?rev...
==============================================================================
--- trunk/reactos/lib/rtl/arm/debug_asm.S [iso-8859-1] (original)
+++ trunk/reactos/lib/rtl/arm/debug_asm.S [iso-8859-1] Sun Jul 13 17:40:36 2008
@@ -17,9 +17,19 @@
     //
     // Do a breakpoint and return
     //
-    bkpt 3
+    bkpt BREAKPOINT_BREAK
     bx lr
     ENTRY_END DbgBreakPoint
+    
+    NESTED_ENTRY DebugService
+    PROLOG_END DebugService
+    
+    //
+    // Do a breakpoint and return
+    //
+    bkpt BREAKPOINT_PRINT // Could also be PROMPT -- we check later in a1
+    bx lr
+    ENTRY_END DebugService

NESTED_ENTRY RtlCaptureContext
     PROLOG_END RtlCaptureContext

Modified: trunk/reactos/ntoskrnl/include/internal/arm/ksarm.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/include/internal/a...
==============================================================================
--- trunk/reactos/ntoskrnl/include/internal/arm/ksarm.h [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/include/internal/arm/ksarm.h [iso-8859-1] Sun Jul 13 17:40:36 2008
@@ -102,6 +102,16 @@
 .equ CsPc,                 0x40
 .equ CsPsr,                0x44

+/*
+ * DebugService Control Types
+ */
+.equ BREAKPOINT_BREAK,          0
+.equ BREAKPOINT_PRINT,          1
+.equ BREAKPOINT_PROMPT,         2
+.equ BREAKPOINT_LOAD_SYMBOLS,   3
+.equ BREAKPOINT_UNLOAD_SYMBOLS, 4
+.equ BREAKPOINT_COMMAND_STRING, 5
+
 #else

/*

Modified: trunk/reactos/ntoskrnl/ke/arm/kiinit.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ke/arm/kiinit.c?re...
==============================================================================
--- trunk/reactos/ntoskrnl/ke/arm/kiinit.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ke/arm/kiinit.c [iso-8859-1] Sun Jul 13 17:40:36 2008
@@ -30,24 +30,6 @@
 KiIdleLoop(
     VOID
 );
-
-VOID
-STDCALL
-KdpSerialDebugPrint(LPSTR Message,
-                    ULONG Length);
-
-VOID
-DebugService(IN ULONG ServiceType,
-             IN PCHAR Buffer,
-             IN ULONG Length,
-             IN ULONG Component,
-             IN ULONG Level)
-{
-    //
-    // FIXME: ARM Bring-up Hack
-    //
-    KdpSerialDebugPrint(Buffer, Length);
-}

VOID
 DebugService2(IN ULONG Arg1,

Modified: trunk/reactos/ntoskrnl/ke/arm/trap.s
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ke/arm/trap.s?rev=...
==============================================================================
--- trunk/reactos/ntoskrnl/ke/arm/trap.s [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ke/arm/trap.s [iso-8859-1] Sun Jul 13 17:40:36 2008
@@ -67,9 +67,22 @@
     PROLOG_END KiPrefetchAbortException

//
-    // FIXME: TODO
+    // Handle trap entry
     //
-    b .
+    TRAP_PROLOG 1 // FromAbort
+    
+    //
+    // Call the C handler
+    //
+    adr lr, 1f
+    mov r0, sp
+    ldr pc, =KiPrefetchAbortHandler
+    
+1:
+    //
+    // Handle trap exit
+    // 
+    TRAP_EPILOG 0 // NotFromSystemCall

ENTRY_END KiPrefetchAbortException

Modified: trunk/reactos/ntoskrnl/ke/arm/trapc.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ke/arm/trapc.c?rev...
==============================================================================
--- trunk/reactos/ntoskrnl/ke/arm/trapc.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ke/arm/trapc.c [iso-8859-1] Sun Jul 13 17:40:36 2008
@@ -432,6 +432,14 @@
 }

NTSTATUS
+KiPrefetchAbortHandler(IN PKTRAP_FRAME TrapFrame)
+{
+    ASSERT(TrapFrame->DbgArgMark == 0xBADB0D00);
+    while (TRUE);
+    return STATUS_SUCCESS;
+}
+
+NTSTATUS
 KiDataAbortHandler(IN PKTRAP_FRAME TrapFrame)
 {
     NTSTATUS Status;