alignb 4
AppendBuf resb max_cmd_len+1 ; append=
KbdMap resb 256 ; Keyboard map
+PathPrefix resb 128 ; 128 bytes (comes from BOOTP size)
FKeyName resb 10*FILENAME_MAX ; File names for F-key help
NumBuf resb 16 ; Buffer to load number
NumBufEnd equ NumBuf+15 ; Pointer to last byte in NumBuf
- alignb 4
+ alignb 32
KernelName resb FILENAME_MAX ; Mangled name for kernel
+KernelCName resb FILENAME_MAX ; Unmangled kernel name
+InitRDCName resb FILENAME_MAX ; Unmangled initrd name
+MNameBuf resb FILENAME_MAX
+InitRD resb FILENAME_MAX
PartInfo resb 16 ; Partition table entry
InitRDat resd 1 ; Load address (linear) for initrd
HiLoadAddr resd 1 ; Address pointer for high load loop
LoadFlags resb 1 ; Loadflags from kernel
A20Tries resb 1 ; Times until giving up on A20
FuncFlag resb 1 ; == 1 if <Ctrl-F> pressed
-KernelCName resb FILENAME_MAX ; Unmangled kernel name
-InitRDCName resb FILENAME_MAX ; Unmangled initrd name
-MNameBuf resb FILENAME_MAX
-InitRD resb FILENAME_MAX
alignb tftp_port_t_size
Sockets resb MAX_SOCKETS*tftp_port_t_size
mov [Stack],sp
mov ax,ss
mov [Stack+2],ax
+;
+; Initialize screen (if we're using one)
+;
+ call adjust_screen
+;
+; Tell the user we got this far
+;
+ mov si,pxelinux_banner
+ call writestr
+
+ mov si,copyright_str
+ call writestr
;
; Now we need to find the !PXE structure. It's *supposed* to be pointed
call crlf
;
-; Initialize screen (if we're using one)
-;
- call adjust_screen
-
-;
-; Tell the user we got this far
-;
- mov si,pxelinux_banner
- call writestr
-
- mov si,copyright_str
- call writestr
-
-;
; Clear Sockets structures
;
mov di,Sockets
.pxe_ok: mov si,myipaddr_msg
call writestr
mov eax,[bootp.yip] ; "Your" IP address
+ xchg ah,al ; Host byte order
+ ror eax,16
+ xchg ah,al
call writehex8
call crlf
- ; Print the boot file
- mov si,bootp.bootfile
- call writestr
- call crlf
-
;
; Normalize ES = DS
;
loop mkkeymap
;
-; Load configuration file
-;
-;
-; Now, prepare some of the data structures
+; Store standard filename prefix
;
-filename_cp: mov si,bootp.bootfile
- mov di,pxe_tftp_open_pkt.filename
+prefix: mov si,bootp.bootfile
+ mov di,PathPrefix
cld
- xor cx,cx
-.strcpy: lodsb
- stosb
- inc cx
- and al,al
- jnz .strcpy
+ call strcpy
+ lea cx,[di-PathPrefix]
std
- dec di
- mov si,di
- mov al,'.'
- repne scasb
- jne .nodot
- inc di
- jmp short .dot
-.nodot: mov di,si
-.dot: cld
- ; Now di points to where we want to add stuff to the filename
- mov si,dot_cfg_slash
- mov cx,dot_cfg_slash_len
+ lea si,[di-2] ; Skip final null!
+ dec cx
+.find_alnum: lodsb
+ or al,20h
+ cmp al,'.' ; Count . or - as alphanum
+ je .alnum
+ cmp al,'-'
+ je .alnum
+ cmp al,'0'
+ jb .notalnum
+ cmp al,'9'
+ jbe .alnum
+ cmp al,'a'
+ jb .notalnum
+ cmp al,'z'
+ ja .notalnum
+.alnum: loop .find_alnum
+.notalnum: mov byte [si+2],0 ; Zero-terminate after delimiter
+ cld
+ mov si,tftpprefix_msg
+ call writestr
+ mov si,PathPrefix
+ call writestr
+ call crlf
+
+;
+; Load configuration file
+;
+find_config: mov di,trackbuf
+ mov si,cfgprefix
+ mov cx,cfgprefix_len
rep movsb
mov cx,8
mov eax,[bootp.yip]
- xchg ah,al ; Convert to native byte order
+ xchg ah,al ; Host byte order
ror eax,16
xchg ah,al
.hexify_loop: rol eax,4
.not_default: pusha
mov si,trying_msg
call writestr
- mov di,pxe_tftp_open_pkt.filename
+ mov di,trackbuf
mov si,di
call writestr
call crlf
got_highmem:
sub eax,HIGHMEM_SLOP
mov [HighMemSize],eax
- call writehex8
+
;
; Construct the command line (append options have already been copied)
;
mov [pxe_udp_write_pkt.buffer],di
mov ax,TFTP_RRQ ; TFTP opcode
stosw
+ push si ; Add common prefix
+ mov si,PathPrefix
+ call strcpy
+ dec di
+ pop si
call strcpy ; Filename
mov si,tftp_tail
mov cx,tftp_tail_len
.bailnow: add sp,byte 8 ; Immediate error - no retry
jmp short .error
-.failure: mov al,'F'
- call writechr
- pop bx ; Junk
+.failure: pop bx ; Junk
pop bx
pop si
pop ax
retf
;
-; dot: debugging routine, prints a dot w/o clobbering registers
-;
-dot: pushad
- pushfd
- mov al,'.'
- call writechr
- popfd
- popad
- ret
-
-;
; getfssec: Get multiple clusters from a file, given the starting cluster.
;
; In this case, get multiple blocks from a specific TCP connection.
; CF = 1 -> Hit EOF
;
getfssec:
- mov al,'G'
- call writechr
.packet_loop: push cx ; <A> Save count
push es ; <B> Save buffer pointer
.send_ack: push cx ; <D>
- mov al,'a'
- call writechr
-
mov eax,[si+tftp_filepos]
shr eax,LOG_TFTP_BLOCKSIZE
xchg ah,al ; Network byte order
.recv_ok: pop dx ; <F>
pop cx ; <E>
- mov al,'r'
- call writechr
-
cmp word [pxe_udp_read_pkt.buffersize],byte 4
jb .send_loop ; Bad size for a DATA packet
; Wrong packet, ACK the packet and then try again
; This is presumably because the ACK got lost,
; so the server just resent the previous packet
- mov al,'w'
- call writechr
-
mov ax,[packet_buf+2]
call ack_packet
jmp .send_ok ; Reset timeout
cmp cx,TFTP_BLOCKSIZE ; Is it a full block
jb .last_block
- mov al,'+'
- call writechr
-
pop di ; <C> Get target buffer
pop es ; <B>
call ack_packet
mov word [si],0 ; Socket closed
- mov al,'*'
- call writechr
-
; Copy data
pop di ; <C>
pop es ; <B>
db 'down the Ctrl key while booting, and I will take your'
db 0Dh, 0Ah
db 'word for it.', 0Dh, 0Ah, 0
-err_noram db 'It appears your computer has less than 608K of low ("DOS")'
- db 0Dh, 0Ah
- db 'RAM. Linux needs at least this amount to boot. If you get'
- db 0Dh, 0Ah
- db 'this message in error, hold down the Ctrl key while'
- db 0Dh, 0Ah
- db 'booting, and I will take your word for it.', 0Dh, 0Ah, 0
err_badcfg db 'Unknown keyword in config file.', 0Dh, 0Ah, 0
err_noparm db 'Missing parameter in config file.', 0Dh, 0Ah, 0
err_noinitrd db 0Dh, 0Ah, 'Could not find ramdisk image: ', 0
apiver_str db 'PXE API version is ',0
pxeentry_msg db 'PXE entry point found (we hope) at ', 0
myipaddr_msg db 'My IP address seems to be ',0
+tftpprefix_msg db 'TFTP prefix: ', 0
ready_msg db 13, 10, 'Ready to start kernel...', 13, 10, 0
trying_msg db 'Trying to load: ', 0
loading_msg db 'Loading ', 0
aborted_msg db ' aborted.' ; Fall through to crlf_msg!
crlf_msg db 0Dh, 0Ah, 0
crff_msg db 0Dh, 0Ch, 0
-syslinux_cfg db 'SYSLINUXCFG'
default_str db 'default', 0
default_len equ ($-default_str)
pxelinux_banner db 0Dh, 0Ah, 'PXELINUX ', version_str, ' ', date, ' ', 0
-dot_cfg_slash db '.cfg/' ; No final null!
-dot_cfg_slash_len equ ($-dot_cfg_slash)
+cfgprefix db 'pxelinux.cfg/' ; No final null!
+cfgprefix_len equ ($-cfgprefix)
;
; Command line options we'd like to take a look at
.buffersize: dw 0 ; Max packet size
.buffer: dw 0, 0 ; seg:off of buffer
-pxe_tftp_open_pkt:
-.status: dw 0 ; Status
-.sip: dd 0 ; Server IP
-.gip: dd 0 ; Gateway IP
-.filename: times 128 db 0 ; Input filename
-.tftpport: dw TFTP_PORT ; TFTP port
-.packetsize: dw 1024 ; Packet size
-
-pxe_tftp_read_pkt:
-.status: dw 0 ; Status
-.packetno: dw 0 ; Packet number
-.buffersize: dw 0 ; Size of packet buffer
-.buffer: dw 0, real_mode_seg ; seg:off of buffer
-
-pxe_tftp_close_pkt:
-.status: dw 0 ; Status
-
pxe_unload_stack_pkt:
.status: dw 0 ; Status
.reserved: times 10 db 0 ; Reserved
projects / profile / ivi / syslinux.git / commitdiff