1/* $NetBSD: brk.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: brk.S,v 1.1 2014/09/03 19:34:26 matt Exp $") 7#endif /* LIBC_SCCS && !lint */ 8 9 .hidden _C_LABEL(__curbrk) 10 .hidden _C_LABEL(__minbrk) 11 .globl _C_LABEL(__curbrk) 12 .globl _C_LABEL(__minbrk) 13 .globl _C_LABEL(_end) 14 15#ifdef WEAK_ALIAS 16WEAK_ALIAS(brk, _brk) 17#endif 18 .data 19 .p2align 2 20_C_LABEL(__minbrk): 21 .long _C_LABEL(_end) 22_C_LABEL(__curbrk): 23 .long _C_LABEL(_end) 24 25 .text 26ENTRY(_brk) 27#ifdef __PIC__ 28 l.or r8,r9,r0 29 PIC_GOTSETUP(r7) 30 l.or r9,r8,r0 31 l.movhi r6,gotoffhi(_C_LABEL(__minbrk)) 32 l.ori r6,r6,gotofflo(_C_LABEL(__minbrk)) 33 l.add r6,r6,r7 34#else 35 l.movhi r6,hi(_C_LABEL(__minbrk)) 36 l.ori r6,r6,lo(_C_LABEL(__minbrk)) 37#endif 38 l.lwz r5,0(r6) # r5 = __minbrk 39 l.sfgts r5,r3 # if (__minbrk <= r3) 40 l.cmov r5,r5,r3 # choose larger 41 l.or r3,r5,r0 # new break value 42 _DOSYSCALL(break) # assume, that r5 is kept 43 l.bf _C_LABEL(__cerror) 44 l.nop 45 l.sw __SIZEOF_POINTER__(r6),r5 46 l.xor r11, r11, r11 # return 0 47 l.jr lr # return 0 48 l.nop 49END(_brk) 50