1/* $NetBSD: sbrk.S,v 1.1 2014/09/03 19:34:26 matt Exp $ */ 2 3#include "SYS.h" 4 5#if defined(LIBC_SCCS) && !defined(lint) 6__RCSID("$NetBSD: sbrk.S,v 1.1 2014/09/03 19:34:26 matt Exp $") 7#endif /* LIBC_SCCS && !lint */ 8 9 .hidden _C_LABEL(__curbrk) 10 .globl _C_LABEL(__curbrk) 11 12#ifdef WEAK_ALIAS 13WEAK_ALIAS(sbrk, _sbrk) 14#endif 15 16ENTRY(_sbrk) 17#ifdef __PIC__ 18 l.or r8,r9,r0 19 PIC_GOTSETUP(r6) 20 l.or r9,r8,r0 21 l.movhi r5,gotoffhi(_C_LABEL(__curbrk)) 22 l.ori r5,r5,gotofflo(_C_LABEL(__curbrk)) 23 l.add r5,r5,r6 24#else 25 l.movhi r5,hi(_C_LABEL(__curbrk)) 26 l.ori r5,r5,lo(_C_LABEL(__curbrk)) # r5 = old break; 27#endif 28 l.lwz r6,0(r5) # r6 = old break, r5 = &curbrk 29 l.add r3,r3,r6 30 _DOSYSCALL(break) # break(new_break) 31 l.bf _C_LABEL(__cerror) 32 l.nop 33 l.sw 0(r5),r3 # record new break 34 l.or r11,r6,r0 # set return value 35 l.jr lr 36 l.nop 37END(_sbrk) 38