File syslinux-openbsd-bootparams-3.80.patch of Package syslinux

--- core/bootsect.inc.orig	2009-05-08 00:10:40.000000000 +0200
+++ core/bootsect.inc	2009-05-08 00:13:09.000000000 +0200
@@ -41,6 +41,28 @@
 		xor dx,dx		; No padding
 		mov bx,abort_check	; Don't print dots, but allow abort
 		call load_high
+                ; Write the boot param signature after the image
+                xor ecx, ecx
+                mov cx, bparams_sig_len
+                mov esi, bparams_sig
+                cld
+                call bcopy
+ 
+                ; Zero terminate the boot params
+                push es
+                push real_mode_seg
+                pop es
+                mov bx, [CmdLinePtr]
+                mov [es:bx], byte 0
+                pop es
+ 
+                ; Write the boot params
+                xor ecx, ecx
+                mov cx, [CmdLinePtr]
+                sub cx, cmd_line_here
+                inc ecx
+                mov esi, (real_mode_seg << 4) + cmd_line_here
+                call bcopy
 
 		sub edi,100000h
 		mov [trackbuf+8],edi	; Save length
@@ -189,6 +211,13 @@
 
 		jmp shuffle_and_boot_raw
 
+
+                section .data
+bparams_sig    db 'BootParams:'
+bparams_sig_len        equ $-bparams_sig
+
+                section .text
+
 		; This stub gets run after the shuffle.  It is copied
 		; below 0x7c00 in order to properly handle the case
 		; of bootstrap replacement.