Change to using libstd startup code

main.68k

@@ -1,21 +1,10 @@
   include syscalls.i
   section .text,text
-  public _start
-_start:
-  move.l #tmp_stack_top, a7
-  ; set up a permanent stack
-  move.l #2, d0
-  move.l #$2, d1
-  jsr syscall_vmem_map_free
-  adda.l #(2*4096), a0
-  move.l a0, a7
+  public main
+main:
   move.l #msg, a0
   jsr syscall_println
-  jsr syscall_exit
+  rts
 
   section .data,data
 msg: dc.b "Hello from test_proc",0
-
-  section .bss,bss
-tmp_stack: ds.w 16
-tmp_stack_top: