diff options
Diffstat (limited to 'pxelinux.asm')
| -rw-r--r-- | pxelinux.asm | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/pxelinux.asm b/pxelinux.asm index 2b7819bd..f99478e4 100644 --- a/pxelinux.asm +++ b/pxelinux.asm @@ -25,6 +25,7 @@ %include "bios.inc" %include "tracers.inc" %include "pxe.inc" +%include "layout.inc" ; ; Some semi-configurable constants... change on your own risk. @@ -175,8 +176,7 @@ tftp_pktbuf resw 1 ; Packet buffer offset ; ; Memory below this point is reserved for the BIOS and the MBR ; -BSS_START equ 0800h - section .earlybss nobits start=BSS_START + section .earlybss trackbufsize equ 8192 trackbuf resb trackbufsize ; Track buffer goes here getcbuf resb trackbufsize @@ -203,7 +203,7 @@ IPOption resb 80 ; ip= option buffer ; writing a received ARP packet into low memory. RBFG_brainfuck resb 0E00h - section .bss nobits align=256 follows=.earlybss + section .bss alignb 4 InitStack resd 1 ; Pointer to reset stack RebootTime resd 1 ; Reboot timeout, if set by option @@ -255,8 +255,6 @@ xbs_vgatmpbuf equ 2*trackbufsize ; PXELINUX needs more BSS than the other derivatives; ; therefore we relocate it from 7C00h on startup ; -TEXT_START equ 9000h - org TEXT_START StackBuf equ $-44 ; Base of stack if we use our own ; @@ -271,21 +269,22 @@ _start: push fs push gs + xor ax,ax + mov ds,ax + mov es,ax + mov si,ldlinux_end-(TEXT_START-7C00h)-4 mov di,ldlinux_end-4 mov cx,ldlinux_end-TEXT_START shr cx,2 std ; Overlapping areas, copy backwards - rep movsb + rep movsd jmp 0:_start1 ; Canonicalize address _start1: mov bp,sp les bx,[bp+48] ; ES:BX -> !PXE or PXENV+ structure - mov ax,cs - mov ds,ax - ; That is all pushed onto the PXE stack. Save the pointer ; to it and switch to an internal stack. mov [InitStack],sp |