/*      $NetBSD: sbrk.S,v 1.13 2014/08/23 02:24:22 matt Exp $   */

#include "SYS.h"

#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: sbrk.S,v 1.13 2014/08/23 02:24:22 matt Exp $")
#endif /* LIBC_SCCS && !lint */

        .hidden _C_LABEL(__curbrk)
        .globl  _C_LABEL(__curbrk)

#ifdef WEAK_ALIAS
WEAK_ALIAS(sbrk, _sbrk)
#endif

ENTRY(_sbrk)
#ifdef __PIC__
        mflr    %r0
        bcl     20,31,.LPIC0
.LPIC0: mflr    %r5
        mtlr    %r0
        addis   %r8,%r5,(_C_LABEL(__curbrk)-.LPIC0)@ha
        ldptru  %r6,(_C_LABEL(__curbrk)-.LPIC0)@l(%r8)
#else
        lis     %r8,_C_LABEL(__curbrk)@ha
        ldptru  %r6,_C_LABEL(__curbrk)@l(%r8)   # r6 = old break, r5 = &curbrk
#endif
        add     %r3,%r3,%r6
        mr      %r7,%r3                         # r7 = new break
        _DOSYSCALL(break)                       # break(new_break)
        bso     1f
        mr      %r3,%r6                         # set return value
        stptr   %r7,0(%r8)                      # record new break
        blr
1:
        BRANCH_TO_CERROR()
END(_sbrk)