Contents of /tags/mkinitrd-6_3_4/isolinux/abort.inc
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Thu Dec 16 01:27:43 2010 UTC (13 years, 9 months ago) by niro
File size: 2116 byte(s)
Thu Dec 16 01:27:43 2010 UTC (13 years, 9 months ago) by niro
File size: 2116 byte(s)
tagged 'mkinitrd-6_3_4'
1 | ; ----------------------------------------------------------------------- |
2 | ; |
3 | ; 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 |
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 | ; |
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> |
35 | ; |
36 | abort_check: |
37 | call reset_idle ; Not idle despite pollchar |
38 | call pollchar |
39 | jz .ret1 |
40 | pusha |
41 | call getchar |
42 | cmp al,27 ; <ESC> |
43 | je .kill |
44 | cmp al,3 ; <Ctrl-C> |
45 | je .kill |
46 | .ret2: popa |
47 | .ret1: ret |
48 | |
49 | .kill: mov si,aborted_msg |
50 | mov bx,enter_command |
51 | jmp abort_load_chain |
52 | |
53 | ; |
54 | ; abort_load: Called by various routines which wants to print a fatal |
55 | ; error message and return to the command prompt. Since this |
56 | ; may happen at just about any stage of the boot process, assume |
57 | ; our state is messed up, and just reset the segment registers |
58 | ; and the stack forcibly. |
59 | ; |
60 | ; SI = offset (in _text) of error message to print |
61 | ; BX = future entry point (abort_load_chain) |
62 | ; |
63 | abort_load: |
64 | mov bx,error_or_command |
65 | abort_load_chain: |
66 | RESET_STACK_AND_SEGS AX |
67 | call writestr ; Expects SI -> error msg |
68 | |
69 | ; 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 |
80 | |
81 | section .data |
82 | aborted_msg db ' aborted.', CR, LF, 0 |
83 | |
84 | section .text |