diff options
Diffstat (limited to 'pxelinux.asm')
| -rw-r--r-- | pxelinux.asm | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/pxelinux.asm b/pxelinux.asm index 2b3a8115..e8c38062 100644 --- a/pxelinux.asm +++ b/pxelinux.asm @@ -8,7 +8,7 @@ ; network booting API. It is based on the SYSLINUX boot loader for ; MS-DOS floppies. ; -; Copyright (C) 1994-2004 H. Peter Anvin +; Copyright (C) 1994-2005 H. Peter Anvin ; ; 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 @@ -196,6 +196,7 @@ ConfigName resb 256-4 ; Configuration file from DHCP option PathPrefix resb 256 ; Path prefix derived from boot file DotQuadBuf resb 16 ; Buffer for dotted-quad IP address IPOption resb 80 ; ip= option buffer +InitStack resd 1 ; Pointer to reset stack ; Warning here: RBFG build 22 randomly overwrites memory location ; [0x5680,0x576c), possibly more. It seems that it gets confused and @@ -205,7 +206,6 @@ RBFG_brainfuck resb 0E00h section .bss alignb 4 -InitStack resd 1 ; Pointer to reset stack RebootTime resd 1 ; Reboot timeout, if set by option StrucPtr resd 1 ; Pointer to PXENV+ or !PXE structure APIVer resw 1 ; PXE API version found @@ -253,9 +253,9 @@ xbs_vgatmpbuf equ 2*trackbufsize section .text ; ; PXELINUX needs more BSS than the other derivatives; - ; therefore we relocate it from 7C00h on startup + ; therefore we relocate it from 7C00h on startup. ; -StackBuf equ $-44 ; Base of stack if we use our own +StackBuf equ $ ; Base of stack if we use our own ; ; Primary entry point. @@ -411,7 +411,7 @@ old_api: ; Need to use a PXENV+ structure mov eax,[es:bx+0Ah] ; PXE RM API mov [PXENVEntry],eax - mov si,undi_data_msg ; *** + mov si,undi_data_msg call writestr mov ax,[es:bx+20h] call writehex4 @@ -466,7 +466,7 @@ have_pxe: mov eax,[es:bx+10h] mov [PXEEntry],eax - mov si,undi_data_msg ; *** + mov si,undi_data_msg call writestr mov eax,[es:bx+2Ah] call writehex8 @@ -1905,7 +1905,13 @@ unload_pxe: jmp .call_loop .call_done: -%if USE_PXE_PROVIDED_STACK +; +; This isn't necessary anymore; we can use the memory area previously +; used by the PXE stack indefinitely, and the chainload code sets up +; a new stack independently. Leave the source code in here for now, +; but expect to rip it out soonish. +; +%if 0 ; USE_PXE_PROVIDED_STACK ; We need to switch to our local stack here... pusha pushf |