1*27620987Smatt/* $NetBSD: brk.S,v 1.1 2014/09/03 19:34:26 matt Exp $ */ 2*27620987Smatt 3*27620987Smatt#include "SYS.h" 4*27620987Smatt 5*27620987Smatt#if defined(LIBC_SCCS) && !defined(lint) 6*27620987Smatt__RCSID("$NetBSD: brk.S,v 1.1 2014/09/03 19:34:26 matt Exp $") 7*27620987Smatt#endif /* LIBC_SCCS && !lint */ 8*27620987Smatt 9*27620987Smatt .hidden _C_LABEL(__curbrk) 10*27620987Smatt .hidden _C_LABEL(__minbrk) 11*27620987Smatt .globl _C_LABEL(__curbrk) 12*27620987Smatt .globl _C_LABEL(__minbrk) 13*27620987Smatt .globl _C_LABEL(_end) 14*27620987Smatt 15*27620987Smatt#ifdef WEAK_ALIAS 16*27620987SmattWEAK_ALIAS(brk, _brk) 17*27620987Smatt#endif 18*27620987Smatt .data 19*27620987Smatt .p2align 2 20*27620987Smatt_C_LABEL(__minbrk): 21*27620987Smatt .long _C_LABEL(_end) 22*27620987Smatt_C_LABEL(__curbrk): 23*27620987Smatt .long _C_LABEL(_end) 24*27620987Smatt 25*27620987Smatt .text 26*27620987SmattENTRY(_brk) 27*27620987Smatt#ifdef __PIC__ 28*27620987Smatt l.or r8,r9,r0 29*27620987Smatt PIC_GOTSETUP(r7) 30*27620987Smatt l.or r9,r8,r0 31*27620987Smatt l.movhi r6,gotoffhi(_C_LABEL(__minbrk)) 32*27620987Smatt l.ori r6,r6,gotofflo(_C_LABEL(__minbrk)) 33*27620987Smatt l.add r6,r6,r7 34*27620987Smatt#else 35*27620987Smatt l.movhi r6,hi(_C_LABEL(__minbrk)) 36*27620987Smatt l.ori r6,r6,lo(_C_LABEL(__minbrk)) 37*27620987Smatt#endif 38*27620987Smatt l.lwz r5,0(r6) # r5 = __minbrk 39*27620987Smatt l.sfgts r5,r3 # if (__minbrk <= r3) 40*27620987Smatt l.cmov r5,r5,r3 # choose larger 41*27620987Smatt l.or r3,r5,r0 # new break value 42*27620987Smatt _DOSYSCALL(break) # assume, that r5 is kept 43*27620987Smatt l.bf _C_LABEL(__cerror) 44*27620987Smatt l.nop 45*27620987Smatt l.sw __SIZEOF_POINTER__(r6),r5 46*27620987Smatt l.xor r11, r11, r11 # return 0 47*27620987Smatt l.jr lr # return 0 48*27620987Smatt l.nop 49*27620987SmattEND(_brk) 50