| 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 .text16 |
|---|
| 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 .data16 |
|---|
| 82 | aborted_msg db ' aborted.', CR, LF, 0 |
|---|
| 83 | |
|---|
| 84 | section .text16 |
|---|
