1/* $NetBSD: sbrk.S,v 1.3 2006/07/07 06:50:06 ross Exp $ */ 2 3#include "SYS.h" 4 5 .globl _C_LABEL(__curbrk) 6 .globl _C_LABEL(_end) 7 8#ifdef WEAK_ALIAS 9WEAK_ALIAS(sbrk, _sbrk) 10#endif 11 12 13 .data 14_C_LABEL(__curbrk): 15 .long _C_LABEL(_end) 16 .text 17 18 .macro LdAddr r,sym 19 .pushsection ".toc","aw" 20100: .tc \sym[TC],\sym 21 .popsection 22 ld \r,100b@toc(2) 23 .endm 24 25ENTRY(_sbrk) 26 ldAddr %r6,__curbrk 27 add %r3,%r3,%r6 28 mr %r7,%r3 # r7 = new break 29 li %r0,SYS_break 30 sc # break(new_break) 31 bso 1f 32 mr %r3,%r6 # set return value 33 LdAddr %r6,__curbrk 34 std %r7,0(%r6) 35 blr 361: 37 b PIC_PLT(_C_LABEL(__cerror)) 38