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    revision 1132 by niro, Sat Sep 1 22:45:15 2007 UTC revision 1133 by niro, Thu Aug 19 09:50:43 2010 UTC
    # Line 1  Line 1 
     ; $Id: abort.inc,v 1.1 2007-09-01 22:44:04 niro Exp $  
    1  ; -----------------------------------------------------------------------  ; -----------------------------------------------------------------------
    2  ;    ;
    3  ;   Copyright 2005 H. Peter Anvin - All Rights Reserved  ;   Copyright 2005-2009 H. Peter Anvin - All Rights Reserved
    4    ;   Copyright 2009 Intel Corporation; author: H. Peter Anvin
    5  ;  ;
    6  ;   This program is free software; you can redistribute it and/or modify  ;   This program is free software; you can redistribute it and/or modify
    7  ;   it under the terms of the GNU General Public License as published by  ;   it under the terms of the GNU General Public License as published by
    # Line 18  Line 18 
    18  ;  ;
    19    
    20   section .text   section .text
    21    
    22    ;
    23    ; dot_pause: same as abort_check, except prints a dot, too
    24    ;            assumes CS == DS
    25    ;
    26    dot_pause:
    27     push si
    28     mov si,dot_msg
    29     call writestr_qchk
    30     pop si
    31     ; fall through
    32    
    33  ;  ;
    34  ; abort_check: let the user abort with <ESC> or <Ctrl-C>  ; abort_check: let the user abort with <ESC> or <Ctrl-C>
    35  ;  ;
    36  abort_check:  abort_check:
    37     call reset_idle ; Not idle despite pollchar
    38   call pollchar   call pollchar
    39   jz .ret1   jz .ret1
    40   pusha   pusha
    # Line 34  abort_check: Line 47  abort_check:
    47  .ret1: ret  .ret1: ret
    48    
    49  .kill: mov si,aborted_msg  .kill: mov si,aborted_msg
    50     mov bx,enter_command
    51   ; ... fall through ...   jmp abort_load_chain
    52    
    53  ;  ;
    54  ; abort_load: Called by various routines which wants to print a fatal  ; abort_load: Called by various routines which wants to print a fatal
    # Line 45  abort_check: Line 58  abort_check:
    58  ;             and the stack forcibly.  ;             and the stack forcibly.
    59  ;  ;
    60  ;             SI    = offset (in _text) of error message to print  ;             SI    = offset (in _text) of error message to print
    61    ;      BX    = future entry point (abort_load_chain)
    62  ;  ;
    63  abort_load:  abort_load:
    64                  mov ax,cs                       ; Restore CS = DS = ES   mov bx,error_or_command
    65                  mov ds,ax  abort_load_chain:
    66                  mov es,ax   RESET_STACK_AND_SEGS AX
    67  %if IS_SYSLINUX || IS_EXTLINUX                  call writestr                  ; Expects SI -> error msg
                     mov ss,ax                       ; Just in case...  
                     mov sp,StackBuf-2*3     ; Reset stack  
     %elif IS_PXELINUX  
      lss esp,[BaseStack]  
     %elif IS_ISOLINUX  
      lss sp,[StackPtr]  
     %else  
      NEED TO KNOW HOW TO RESET STACK  
     %endif  
      sti  
                     call cwritestr                  ; Expects SI -> error msg  
    68    
    69   ; Return to the command prompt   ; Return to the command prompt
    70     jmp bx
    71    
    72    ;
    73    ; error_or_command: Execute ONERROR if appropriate, otherwise enter_command
    74    ;
    75    error_or_command:
    76     mov cx,[OnerrorLen]
    77     and cx,cx
    78     jnz on_error
    79   jmp enter_command   jmp enter_command
    80    
    81     section .data
    82    aborted_msg db ' aborted.', CR, LF, 0
    83    
    84     section .text
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