| ; ----------------------------------------------------------------------- |
| ; |
| ; Copyright 2005-2007 H. Peter Anvin - All Rights Reserved |
| ; |
| ; This program is free software; you can redistribute it and/or modify |
| ; it under the terms of the GNU General Public License as published by |
| ; the Free Software Foundation, Inc., 53 Temple Place Ste 330, |
| ; Boston MA 02111-1307, USA; either version 2 of the License, or |
| ; (at your option) any later version; incorporated herein by reference. |
| ; |
| ; ----------------------------------------------------------------------- |
| |
| ; |
| ; abort.inc |
| ; |
| ; Code to terminate a kernel load |
| ; |
| |
| section .text |
| ; |
| ; abort_check: let the user abort with <ESC> or <Ctrl-C> |
| ; |
| abort_check: |
| call pollchar |
| jz .ret1 |
| pusha |
| call getchar |
| cmp al,27 ; <ESC> |
| je .kill |
| cmp al,3 ; <Ctrl-C> |
| je .kill |
| .ret2: popa |
| .ret1: ret |
| |
| .kill: mov si,aborted_msg |
| mov bx,enter_command |
| jmp abort_load_chain |
| |
| ; |
| ; abort_load: Called by various routines which wants to print a fatal |
| ; error message and return to the command prompt. Since this |
| ; may happen at just about any stage of the boot process, assume |
| ; our state is messed up, and just reset the segment registers |
| ; and the stack forcibly. |
| ; |
| ; SI = offset (in _text) of error message to print |
| ; BX = future entry point (abort_load_chain) |
| ; |
| abort_load: |
| mov bx,error_or_command |
| abort_load_chain: |
| RESET_STACK_AND_SEGS AX |
| call cwritestr ; Expects SI -> error msg |
| |
| ; Return to the command prompt |
| jmp bx |
| |
| ; |
| ; error_or_command: Execute ONERROR if appropriate, otherwise enter_command |
| ; |
| error_or_command: |
| mov cx,[OnerrorLen] |
| and cx,cx |
| jnz on_error |
| jmp enter_command |
| |
| section .data |
| aborted_msg db ' aborted.', CR, LF |
| |
| section .text |
