1 files changed, 114 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r0drv/os2/RTR0Os2DHVMGlobalToProcess.asm b/src/VBox/Runtime/r0drv/os2/RTR0Os2DHVMGlobalToProcess.asm
new file mode 100644
index 00000000..e1b44d42
--- /dev/null
+++ b/src/VBox/Runtime/r0drv/os2/RTR0Os2DHVMGlobalToProcess.asm
@@ -0,0 +1,114 @@
+; $Id: RTR0Os2DHVMGlobalToProcess.asm $
+;; @file
+; IPRT - DevHelp_VMGlobalToProcess, Ring-0 Driver, OS/2.
+;
+
+;
+; Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
+;
+; Permission is hereby granted, free of charge, to any person
+; obtaining a copy of this software and associated documentation
+; files (the "Software"), to deal in the Software without
+; restriction, including without limitation the rights to use,
+; copy, modify, merge, publish, distribute, sublicense, and/or sell
+; copies of the Software, and to permit persons to whom the
+; Software is furnished to do so, subject to the following
+; conditions:
+;
+; The above copyright notice and this permission notice shall be
+; included in all copies or substantial portions of the Software.
+;
+; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+; OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+; NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+; HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+; WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+; FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+; OTHER DEALINGS IN THE SOFTWARE.
+;
+
+
+;*******************************************************************************
+;* Header Files                                                                *
+;*******************************************************************************
+%define RT_INCL_16BIT_SEGMENTS
+%include "iprt/asmdefs.mac"
+%include "iprt/err.mac"
+
+
+;*******************************************************************************
+;* External Symbols                                                            *
+;*******************************************************************************
+extern KernThunkStackTo32
+extern KernThunkStackTo16
+extern NAME(g_fpfnDevHlp)
+
+
+;*******************************************************************************
+;* Defined Constants And Macros                                                *
+;*******************************************************************************
+%define DevHlp_VMGlobalToProcess  05ah
+
+
+BEGINCODE
+
+;;
+; VMGlobalToProcess wrapper.
+;
+; @param    fFlags  [ebp + 08h]     Flags
+; @param    pvR0    [ebp + 0ch]     Ring-0 memory.
+; @param    cb      [ebp + 10h]     Size of memory object to map.
+; @param    ppR3    [ebp + 14h]     Where to store the address of the ring-3 mapping.
+;
+BEGINPROC_EXPORTED RTR0Os2DHVMGlobalToProcess
+    ; switch stack first.
+    call    KernThunkStackTo16
+
+    ; normal prolog.
+    push    ebp
+    mov     ebp, esp
+    push    dword [NAME(g_fpfnDevHlp)]  ; ebp - 4
+    push    ebx                         ; save ebx
+
+    ; setup the devhelp call
+    mov     eax, [ebp + 08h]            ; fFlags
+    mov     ebx, [ebp + 0ch]            ; pvR0
+    mov     ecx, [ebp + 10h]            ; cb
+    mov     dl, DevHlp_VMGlobalToProcess
+
+    ; jump to the 16-bit code.
+    ;jmp far dword NAME(RTR0Os2DHQueryDOSVar_16) wrt CODE16
+    db      066h
+    db      0eah
+    dw      NAME(RTR0Os2DHVMGlobalToProcess_16) wrt CODE16
+    dw      CODE16
+BEGINCODE16
+GLOBALNAME RTR0Os2DHVMGlobalToProcess_16
+    call far [ss:ebp - 4]
+
+    ;jmp far dword NAME(RTR0Os2DHVMGlobalToProcess_32) wrt FLAT
+    db      066h
+    db      0eah
+    dd      NAME(RTR0Os2DHVMGlobalToProcess_32) ;wrt FLAT
+    dw      TEXT32 wrt FLAT
+BEGINCODE
+GLOBALNAME RTR0Os2DHVMGlobalToProcess_32
+    jc      .done
+
+    ; save the result.
+    mov     edx, [ebp + 14h]            ; ppvR3
+    mov     [edx], eax
+    xor     eax, eax
+
+.done:
+    pop     ebx
+    leave
+
+    ; switch stack back and return.
+    push    eax
+    call    KernThunkStackTo32
+    pop     eax
+    ret
+ENDPROC RTR0Os2DHVMGlobalToProcess
+