mkinitrd-magellan/isolinux/abort.inc

; $Id: abort.inc,v 1.1 2007-09-01 22:44:04 niro Exp $
; -----------------------------------------------------------------------
;   
;   Copyright 2005 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

		; ... fall through ...

;
; 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
;
abort_load:
                mov ax,cs                       ; Restore CS = DS = ES
                mov ds,ax
                mov es,ax
%if IS_SYSLINUX || IS_EXTLINUX
                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

		; Return to the command prompt
		jmp enter_command
1	; $Id: abort.inc,v 1.1 2007-09-01 22:44:04 niro Exp $
2	; -----------------------------------------------------------------------
3	;
4	; Copyright 2005 H. Peter Anvin - All Rights Reserved
5	;
6	; 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
8	; the Free Software Foundation, Inc., 53 Temple Place Ste 330,
9	; Boston MA 02111-1307, USA; either version 2 of the License, or
10	; (at your option) any later version; incorporated herein by reference.
11	;
12	; -----------------------------------------------------------------------
13
14	;
15	; abort.inc
16	;
17	; Code to terminate a kernel load
18	;
19
20	section .text
21	;
22	; abort_check: let the user abort with <ESC> or <Ctrl-C>
23	;
24	abort_check:
25	call pollchar
26	jz .ret1
27	pusha
28	call getchar
29	cmp al,27 ; <ESC>
30	je .kill
31	cmp al,3 ; <Ctrl-C>
32	je .kill
33	.ret2: popa
34	.ret1: ret
35
36	.kill: mov si,aborted_msg
37
38	; ... fall through ...
39
40	;
41	; abort_load: Called by various routines which wants to print a fatal
42	; error message and return to the command prompt. Since this
43	; may happen at just about any stage of the boot process, assume
44	; our state is messed up, and just reset the segment registers
45	; and the stack forcibly.
46	;
47	; SI = offset (in _text) of error message to print
48	;
49	abort_load:
50	mov ax,cs ; Restore CS = DS = ES
51	mov ds,ax
52	mov es,ax
53	%if IS_SYSLINUX \|\| IS_EXTLINUX
54	mov ss,ax ; Just in case...
55	mov sp,StackBuf-2*3 ; Reset stack
56	%elif IS_PXELINUX
57	lss esp,[BaseStack]
58	%elif IS_ISOLINUX
59	lss sp,[StackPtr]
60	%else
61	NEED TO KNOW HOW TO RESET STACK
62	%endif
63	sti
64	call cwritestr ; Expects SI -> error msg
65
66	; Return to the command prompt
67	jmp enter_command