#old = sbrk(increment); # #sbrk gets increment more core, and returns a pointer # to the beginning of the new core area # break = 17 .globl _sbrk .globl _end .globl cerror _sbrk: addql #3,sp@(4) andl #0xfffffffc,sp@(4) movl nd,d0 addl sp@(4),d0 movl d0,sp@- jsr 1f bcc noerr1 addql #4,sp jmp cerror2 noerr1: addql #4,sp movl nd,d0 movl sp@(4),d1 addl d1,nd movl d0,a0 rts 1: pea break trap #0 rts .globl _brk # brk(value) # as described in man2. # returns 0 for ok, -1 for error. _brk: pea break trap #0 bcc noerr2 jmp cerror2 noerr2: movl sp@(4),nd clrl d0 lea 0,a0 rts .data nd: .long _end