minix/lib/nbsd_libc/arch/powerpc64/sys/sbrk.S

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/* $NetBSD: sbrk.S,v 1.3 2006/07/07 06:50:06 ross Exp $ */
#include "SYS.h"
.globl _C_LABEL(__curbrk)
.globl _C_LABEL(_end)
#ifdef WEAK_ALIAS
WEAK_ALIAS(sbrk, _sbrk)
#endif
.data
_C_LABEL(__curbrk):
.long _C_LABEL(_end)
.text
.macro LdAddr r,sym
.pushsection ".toc","aw"
100: .tc \sym[TC],\sym
.popsection
ld \r,100b@toc(2)
.endm
ENTRY(_sbrk)
ldAddr %r6,__curbrk
add %r3,%r3,%r6
mr %r7,%r3 # r7 = new break
li %r0,SYS_break
sc # break(new_break)
bso 1f
mr %r3,%r6 # set return value
LdAddr %r6,__curbrk
std %r7,0(%r6)
blr
1:
b PIC_PLT(_C_LABEL(__cerror))