; $Id: VMMGC.mac 6255 2008-01-06 01:07:29Z vboxsync $
;; @file
; VMMGC - Guest Context Assembly Macros.
;

;
; Copyright (C) 2006-2007 innotek GmbH
;
; This file is part of VirtualBox Open Source Edition (OSE), as
; available from http://www.virtualbox.org. This file is free software;
; you can redistribute it and/or modify it under the terms of the GNU
; General Public License (GPL) as published by the Free Software
; Foundation, in version 2 as it comes in the "COPYING" file of the
; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
;

%ifndef __VMMGC_mac__
%define __VMMGC_mac__

%include "VBox/asmdefs.mac"


;; @def VMMR0_SEG
; Set the output segment to one of the special VMMR0 segments.
; @param    %1      The segment name.
; @remark   Use BEGINCODE to switch back to the code segment.
%ifdef ASM_FORMAT_OMF
 %macro VMMR0_SEG 1
 segment VMMR0.%1 public CLASS=CONST align=1 use32
 %endmacro
 %define VMMR0_SEG_DEFINED
%endif

%ifdef ASM_FORMAT_ELF
 %macro VMMR0_SEG 1
  %ifndef DEFINED_VMMR0_SEG.%1
   %define DEFINED_VMMR0_SEG.%1 1
   [section .VMMR0.%1 progbits alloc noexec nowrite align=1 ]
  %else
   [section .VMMR0.%1 align=1 ]
  %endif
 %endmacro
 %define VMMR0_SEG_DEFINED
%endif

%ifdef ASM_FORMAT_MACHO
 %ifdef __YASM__
  ; this syntax requires a patch yasm, sorry.
  %macro VMMR0_SEG 1
  [section %1 segname=VMMR0 align=1 ]
  %endmacro
 %else
  %macro VMMR0_SEG 1
  [section VMMR0.%1 rdata align=1 ]
  %endmacro
 %endif
 %define VMMR0_SEG_DEFINED
%endif

%ifdef ASM_FORMAT_PE
 %macro VMMR0_SEG 1
 [section .rdata$VMMR0.%1 align=1 ]
 %endmacro
 %define VMMR0_SEG_DEFINED
%endif

%ifndef VMMR0_SEG_DEFINED
 %error "VMMR0_SEG / ASM_FORMAT_xxx"
%endif


;; @def TRPM_HANDLER
; Sets up a trap handler.
;
; @param    %1  The segment name.
; @param    %2  The end address. Use 0 to just handle one instruction.
; @param    %3  Address of the handler function.
; @param    %4  The user data member.
%macro TRPM_HANDLER 4

VMMR0_SEG %1                            ; switch to the record segemnt.

    dd  %%current_instr                 ; uStartEip
    dd  %2                              ; uEndEip
    dd  %3                              ; pfnHandler
    dd  %4                              ; pvUser

BEGINCODE                               ; back to the code segment.
%%current_instr:

%endmacro

;; @def TRPM_NP_HANDLER
; Sets up a segment not present fault handler for the current (=next) instruction.
;
; @param    %1  Address of the handler function.
; @param    %2  The user data member.
%macro TRPM_NP_HANDLER 2
TRPM_HANDLER Trap0b, 0, %1, %2
%endmacro


;; @def TRPM_GP_HANDLER
; Sets up a general protection fault handler for the current (=next) instruction.
;
; @param    %1  Address of the handler function.
; @param    %2  The user data member.
%macro TRPM_GP_HANDLER 2
TRPM_HANDLER Trap0d, 0, %1, %2
%endmacro


;; @def TRPM_PF_HANDLER
; Sets up a page fault handler for the current (=next) instruction.
;
; @param    %1  Address of the handler function.
; @param    %2  The user data member.
%macro TRPM_PF_HANDLER 2
TRPM_HANDLER Trap0e, 0, %1, %2
%endmacro


;; @def TRPM_NP_GP_HANDLER
; Sets up a segment not present fault and genernal protection fault handler
; for the current (=next) instruction.
;
; @param    %1  Address of the handler function.
; @param    %2  The user data member.
%macro TRPM_NP_GP_HANDLER 2
TRPM_HANDLER Trap0b, 0, %1, %2
TRPM_HANDLER Trap0d, 0, %1, %2
%endmacro


%endif