;; -----------------------------------------------------------------------
;;
-;; Copyright 1994-2005 H. Peter Anvin - All Rights Reserved
+;; Copyright 1994-2008 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
call parse_config ; Parse configuration file
no_config_file:
+ call adv_init
+;
+; Check for an ADV boot-once entry
+;
+ mov dl,ADV_BOOTONCE
+ call adv_get
+ jcxz .no_bootonce
+
+.have_bootone:
+ ; We apparently have a boot-once set; clear it and
+ ; then execute the boot-once...
+
+ ; Save the boot-once data; SI = data, CX = length
+ mov di,command_line
+ rep movsb
+ xor ax,ax
+ stosb
+
+ ; Clear the boot-once data from the ADV
+ xor cx,cx ; Set to zero = delete
+ call adv_set
+ jc .err
+ call adv_write
+.err: jmp load_kernel
+
+.no_bootonce:
+
;
; Check whether or not we are supposed to display the boot prompt.
;
cmp di,command_line ; Space must not be first
je short get_char
enter_char: test byte [FuncFlag],1
- jz .not_ctrl_f
- mov byte [FuncFlag],0
- cmp al,'0'
- jb .not_ctrl_f
- je ctrl_f_0
- cmp al,'9'
- jbe ctrl_f
-.not_ctrl_f: cmp di,max_cmd_len+command_line ; Check there's space
+ jnz ctrl_f ; Keystroke after <Ctrl-F>
+ cmp di,max_cmd_len+command_line ; Check there's space
jnb short get_char
stosb ; Save it
call writechr ; Echo to screen
jmp short get_char
-not_ascii: mov byte [FuncFlag],0
+not_ascii:
cmp al,0Dh ; Enter
je command_done
cmp al,'F' & 1Fh ; <Ctrl-F>
je set_func_flag
+%if IS_PXELINUX
+ cmp al,'N' & 1Fh ; <Ctrl-N>
+ je show_network_info
+%endif
cmp al,'U' & 1Fh ; <Ctrl-U>
je kill_command ; Kill input line
cmp al,'V' & 1Fh ; <Ctrl-V>
dec di ; Unstore one character
mov si,wipe_char ; and erase it from the screen
call cwritestr
- jmp short get_char_2
+get_char_2:
+ jmp short get_char
kill_command:
call crlf
set_func_flag:
mov byte [FuncFlag],1
-get_char_2:
- jmp short get_char
+ jmp short get_char_2
-ctrl_f_0: add al,10 ; <Ctrl-F>0 == F10
-ctrl_f: sub al,'1'
+ctrl_f:
xor ah,ah
- jmp short show_help
+ mov [FuncFlag],ah
+ cmp al,'0'
+ jb get_char_2
+ je .zero ; <Ctrl-F>0 = F10
+ or al,20h ; Lower case
+ cmp al,'9'
+ jna .digit
+ cmp al,'a' ; F10-F12 = <Ctrl-F>A, B, C
+ jb get_char_2
+ cmp al,'c'
+ ja get_char_2
+ sub al,'a'-10
+ jmp show_help
+.zero:
+ mov al,10
+ jmp show_help
+.digit:
+ sub al,'1'
+ jmp show_help
func_key:
; AL = 0 if we get here
xchg al,ah
- cmp al,68 ; F10
- ja short get_char_2
- sub al,59 ; F1
- jb short get_char_2
-show_help: ; AX = func key # (0 = F1, 9 = F10)
+ cmp al,44h ; F10
+ ja .f11_f12
+ sub al,3Bh ; F1
+ jb get_char_2
+ jmp show_help
+.f11_f12:
+ cmp al,85h ; F11
+ jb get_char_2
+ cmp al,86h ; F12
+ ja get_char_2
+ sub al,85h-10
+
+show_help: ; AX = func key # (0 = F1, 9 = F10, 11 = F12)
push di ; Save end-of-cmdline pointer
shl ax,FILENAME_MAX_LG2 ; Convert to pointer
add ax,FKeyName
xchg di,ax
cmp byte [di+NULLOFFSET],NULLFILE
je short fk_nofile ; Undefined F-key
- call searchdir
+ call open
jz short fk_nofile ; File not found
- push si
call crlf
- pop si
call get_msg_file
jmp short fk_wrcmd
mov si,command_line
call cwritestr ; Write command line so far
fk_nofile: pop di
- jmp short get_char_2
+ jmp get_char
+
+;
+; Show network info (in the form of the ipappend strings)
+;
+%if IS_PXELINUX
+show_network_info:
+ push di ; Command line write pointer
+ call crlf
+ mov si,IPAppends ; See comboot.doc
+ mov cx,numIPAppends
+.loop:
+ lodsw
+ push si
+ mov si,ax
+ call cwritestr
+ call crlf
+ pop si
+ loop .loop
+ jmp fk_wrcmd
+%endif
;
; Jump here to run the default command line
mov si,command_line
mov di,KernelName
push si
- push di
call mangle_name
- pop di
pop si
;
; Fast-forward to first option (we start over from the beginning, since
; Now check if it is a "virtual kernel"
;
vk_check:
- xor si,si ; Beginning of vk_seg
+ mov esi,[HighMemSize] ; Start from top of memory
.scan:
- cmp si,[VKernelBytes]
- jae .not_vk
-
- push ds
- push word vk_seg
- pop ds
+ cmp esi,[VKernelEnd]
+ jbe .not_vk
mov di,VKernelBuf
call rllunpack
- pop ds
- ; SI updated on return
+ ; ESI updated on return
sub di,cx ; Return to beginning of buf
push si
; Find the kernel on disk
;
get_kernel: mov byte [KernelName+FILENAME_MAX],0 ; Zero-terminate filename/extension
-%if IS_SYSLINUX || IS_MDSLINUX ; SYSLINUX has to deal with DOS mangled names...
- mov eax,[KernelName+8] ; Save initial extension
- mov [exten_table_end],eax ; Last case == initial ext.
-%else
mov di,KernelName+4*IS_PXELINUX
xor al,al
mov cx,FILENAME_MAX-5 ; Need 4 chars + null
jne .no_skip
dec di ; Point to final null
.no_skip: mov [KernelExtPtr],di
-%endif
mov bx,exten_table
.search_loop: push bx
- mov di,KernelName ; Search on disk
+ mov di,KernelName ; Search on disk
call searchdir
pop bx
jnz kernel_good
mov eax,[bx] ; Try a different extension
-%if IS_SYSLINUX || IS_MDSLINUX
- mov [KernelName+8],eax
-%else
mov si,[KernelExtPtr]
mov [si],eax
mov byte [si+4],0
-%endif
add bx,byte 4
cmp bx,exten_table_end
jna .search_loop ; allow == case (final case)
jmp abort_load ; Ask user for clue
;
-; on_error: bad kernel, but we have onerror set
+; on_error: bad kernel, but we have onerror set; CX = OnerrorLen
;
on_error:
mov si,Onerror
; that decision on the file extension. The following extensions are
; recognized; case insensitive:
;
-; .com - COMBOOT image
+; .com - COMBOOT image
; .cbt - COMBOOT image
; .c32 - COM32 image
; .bs - Boot sector
; COMBOOT function INT 22h, AX=0016h.
mov si,[Kernel_SI]
mov eax,[Kernel_EAX]
- mov dx,[Kernel_EAX+2]
kernel_good:
- pusha
+ pushad
+
mov si,KernelName
mov di,KernelCName
call unmangle_name
sub di,KernelCName
mov [KernelCNameLen],di
- popa
-%if IS_SYSLINUX || IS_MDSLINUX
- mov ecx,[KernelName+7]
- mov cl,'.'
-%else
+ ; Default memory limit, can be overridden by image loaders
+ mov eax,[HighMemRsvd]
+ mov [MyHighMemSize],eax
+
+ popad
+
push di
push ax
mov di,KernelName+4*IS_PXELINUX
.one_step: mov ecx,[di-4] ; 4 bytes before end
pop ax
pop di
-%endif
;
-; At this point, DX:AX contains the size of the kernel, SI contains
+; At this point, EAX contains the size of the kernel, SI contains
; the file handle/cluster pointer, and ECX contains the extension (if any.)
;
movzx di,byte [KernelType]
je is_bss_sector
cmp ecx,'.bin'
je is_bootsector
-%if IS_SYSLINUX || IS_MDSLINUX
- cmp ecx,'.bs '
- je is_bootsector
- cmp ecx,'.0 '
- je is_bootsector
-%else
shr ecx,8
cmp ecx,'.bs'
je is_bootsector
shr ecx,8
cmp cx,'.0'
je is_bootsector
-%endif
+
; Otherwise Linux kernel
jmp is_linux_kernel
is_config_file:
+ pusha
+ mov si,KernelCName ; Save the config file name, for posterity
+ mov di,ConfigName
+ call strcpy
+ popa
call openfd
call reset_config
jmp load_config_file
%endif
section .data
+boot_prompt db 'boot: ', 0
+wipe_char db BS, ' ', BS, 0
err_badimage db 'Invalid image type for this media type!', CR, LF, 0
+err_notfound db 'Could not find kernel image: ',0
+err_notkernel db CR, LF, 'Invalid or corrupt kernel image.', CR, LF, 0
+
align 2, db 0
kerneltype_table:
dw is_linux_kernel ; VK_LINUX
dw is_bootsector ; VK_BOOT
dw is_bss_sector ; VK_BSS
+ dw is_bootsector ; VK_PXE
dw is_disk_image ; VK_FDIMAGE
dw is_comboot_image ; VK_COMBOOT
dw is_com32_image ; VK_COM32
KernelType resb 1 ; Kernel type, from vkernel, if known
section .text
+;
+; Linux kernel loading code is common.
+;
+%include "runkernel.inc"
+
+;
+; COMBOOT-loading code
+;
+%include "comboot.inc"
+%include "com32.inc"
+%include "cmdline.inc"
+
+;
+; Boot sector loading code
+;
+%include "bootsect.inc"
+
+;
+; Abort loading code
+;
+%include "abort.inc"
+
+;
+; Hardware cleanup common code
+;
+%include "cleanup.inc"
projects / profile / ivi / syslinux.git / blobdiff