217 lines
9.0 KiB
NASM
217 lines
9.0 KiB
NASM
;
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; Command & Conquer Red Alert(tm)
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; Copyright 2025 Electronic Arts Inc.
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;
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; This program is free software: you can redistribute it and/or modify
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; it under the terms of the GNU General Public License as published by
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; the Free Software Foundation, either version 3 of the License, or
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; (at your option) any later version.
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;
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; This program is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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; GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public License
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; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;
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;***************************************************************************
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;** C O N F I D E N T I A L --- W E S T W O O D S T U D I O S **
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;***************************************************************************
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;* *
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;* Project Name : Hard/Critical Error Handler *
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;* *
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;* File Name : harderr.asm *
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;* *
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;* Programmer : Scott K. Bowen. *
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;* *
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;* Start Date : July 18, 1994 *
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;* *
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;* Last Update : July 26, 1994 [SKB] *
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;* *
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;*-------------------------------------------------------------------------*
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;* Functions: *
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;* Install_Hard_Error_Handler -- Setup for handling critical errors *
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;* Remove_Hard_Erroror_Handler -- Remove the critical error handler stuff*
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;* Critical_Error_Handler -- Catch critical error interrupt. *
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;* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - *
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IDEAL
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P386
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MODEL USE32 FLAT
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LOCALS ??
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;INCLUDE "tntdos.inc"
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;//////////////////////////////////////////////////////////////////////////////////////
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;///////////////////////////////////// Equates ////////////////////////////////////////
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DOS_SYS_CALL EQU 21h ; to do TNT DOS-XNDR system calls.
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LOCK_PAGES EQU 5 ; Lock pages subfunction using DX_MEM_MGT
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UNLOCK_PAGES EQU 6 ; Unlock pages subfunction using DX_MEM_MGT
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CRITERR_INT_NUM EQU 24h
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DISK_ERROR_BIT EQU 01000000000000000b ; bit 7 of dh.
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DISK_ERROR EQU 1 ; Value of Hard_Error_Occured if disk/floppy error.
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OTHER_ERROR EQU 2 ; Value of Hard_Error_Occured if other type of error.
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;
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; Interrupt handler stack frame
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;
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_FLGS equ [DWORD PTR ebp+52] ; 386|DOS-Extender flags
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_GS equ [WORD PTR ebp+48] ; original GS
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_FS equ [WORD PTR ebp+44] ; original FS
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_DS equ [WORD PTR ebp+40] ; original DS
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_ES equ [WORD PTR ebp+36] ; original ES
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_SS equ [WORD PTR ebp+32] ; original SS
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_ESP equ [DWORD PTR ebp+28] ; original ESP
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_EFLAGS equ [DWORD PTR ebp+24] ; original EFLAGS
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_CS equ [DWORD PTR ebp+20] ; original CS
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_EIP equ [DWORD PTR ebp+16] ; original EIP
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_EBP equ [DWORD PTR ebp] ; original EBP
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;
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; DOS critical error stack frame
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;
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_DOS_FLAGS equ [WORD PTR es:ebx+22] ; interrupt stack frame from real
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_DOS_CS equ [WORD PTR es:ebx+20] ; mode INT 21h
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_DOS_IP equ [WORD PTR es:ebx+18] ;
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_DOS_ES equ [WORD PTR es:ebx+16] ; regs at time INT 21h was issued
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_DOS_DS equ [WORD PTR es:ebx+14] ; in real mode
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_DOS_BP equ [WORD PTR es:ebx+12] ;
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_DOS_DI equ [WORD PTR es:ebx+10] ;
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_DOS_SI equ [WORD PTR es:ebx+8] ;
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_DOS_DX equ [WORD PTR es:ebx+6] ;
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_DOS_CX equ [WORD PTR es:ebx+4] ;
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_DOS_BX equ [WORD PTR es:ebx+2] ;
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_DOS_AX equ [WORD PTR es:ebx] ;
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;
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; Error codes put into Hard_Error_Code
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;
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DISK_WRITE_PROTECTED equ 00h
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UNKOWN_DEVICE equ 01h
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DRIVE_NOT_READY equ 02h
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UNKOWN_COMMAND equ 03h
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CRC_ERROR equ 04h
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WRONG_DATA_LENGTH equ 05h
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SEEK_ERROR equ 06h
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UNKOWN_DEVICE_TYPE equ 07h
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SECTOR_NOT_FOUND equ 08h
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OUT_OF_PAPER equ 09h
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WRITE_ERROR equ 0Ah
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READ_ERROR equ 0Bh
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GENERAL_ERROR equ 0Ch
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;//////////////////////////////////////////////////////////////////////////////////////
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;/////////////////////////////////// Prototypes ///////////////////////////////////////
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GLOBAL Install_Hard_Error_Handler :NEAR
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GLOBAL Remove_Hard_Error_Handler :NEAR
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;//////////////////////////////////////////////////////////////////////////////////////
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;///////////////////////////////// Global/Local Data //////////////////////////////////
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DATASEG
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LABEL LockedDataStart BYTE
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Hard_Error_Occured DB 0 ; Hard disk error or other error.
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Hard_Error_Code DB 0 ; Error Code.
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LABEL LockedDataEnd BYTE
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OldRMI DD ? ; original real mode critical err vector
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OldPMIOffset DD ? ; original protected mode critical err vector
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OldPMISelector DD ? ; original PM crit error selector.
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InitFlags DD 0 ; Flags to indicate what has been initialized.
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; InitFlags that are set to have a fully functional interrupt.
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IF_SET_VECTORS equ 1 ; Vectors have been set.
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IF_LOCKED_PM_CODE equ 2 ; Locked PM code for DPMI.
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IF_LOCKED_PM_DATA equ 4 ; Locked PM data for DPMI.
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IF_FUNCTIONAL equ 8 ; crit error is in and functional.
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;//////////////////////////////////////////////////////////////////////////////////////
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;///////////////////////////////////// Code //////////////////////////////////////////
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CODESEG
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;***************************************************************************
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;* INSTALL_HARD_ERROR_HANDLER -- Setup for handling critical errors. *
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;* *
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;* *
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;* *
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;* INPUT: *
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;* *
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;* OUTPUT: *
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;* *
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;* WARNINGS: *
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;* *
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;* HISTORY: *
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;* 07/26/1994 SKB : Created. *
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;*=========================================================================*
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PROC Install_Hard_Error_Handler C near
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USES eax,ebx,ecx,ds,es
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ret
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ENDP Install_Hard_Error_Handler
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;***************************************************************************
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;* REMOVE_HARD_ERROROR_HANDLER -- Remove the critical error handler stuff *
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;* *
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;* *
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;* *
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;* INPUT: *
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;* *
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;* OUTPUT: *
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;* *
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;* WARNINGS: *
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;* *
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;* HISTORY: *
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;* 07/26/1994 SKB : Created. *
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;*=========================================================================*
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PROC Remove_Hard_Error_Handler C near
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USES ebx,ecx,edx,ds,es
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;
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; Restore the original interrupt vectors and exit
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;
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ret
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ENDP Remove_Hard_Error_Handler
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;***************************************************************************
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;* Critical_Error_Handler -- Catch critical error interrupt. *
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;* *
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;* *
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;* *
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;* INPUT: *
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;* *
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;* OUTPUT: *
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;* *
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;* WARNINGS: *
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;* *
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;* HISTORY: *
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;* 07/26/1994 SKB : Created. *
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;*=========================================================================*
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LABEL LockedCodeStart BYTE
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PROC Critical_Error_Handler NEAR
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ENDP Critical_Error_Handler
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LABEL LockedCodeEnd BYTE
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END
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