/*      $NetBSD: brk.S,v 1.14 2014/08/23 02:24:22 matt Exp $    */

#include "SYS.h"

#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: brk.S,v 1.14 2014/08/23 02:24:22 matt Exp $")
#endif /* LIBC_SCCS && !lint */

        .hidden _C_LABEL(__curbrk)
        .globl  _C_LABEL(__curbrk)
        .hidden _C_LABEL(__minbrk)
        .globl  _C_LABEL(__minbrk)
        .globl  _C_LABEL(_end)

#ifdef WEAK_ALIAS
WEAK_ALIAS(brk, _brk)
#endif

        .data
        .p2align 2
_C_LABEL(__minbrk):
        .long   _C_LABEL(_end)
_C_LABEL(__curbrk):
        .long   _C_LABEL(_end)

ENTRY(_brk)
#ifdef __PIC__
        mflr    %r0
        bcl     20,31,.LPIC0
.LPIC0: mflr    %r9
        mtlr    %r0
        addis   %r9,%r9,(_C_LABEL(__minbrk)-.LPIC0)@ha 
        ldptru  %r5,(_C_LABEL(__minbrk)-.LPIC0)@l(%r9)  # r5 = &_end
#else
        lis     %r9,_C_LABEL(__minbrk)@ha
        ldptru  %r5,_C_LABEL(__minbrk)@l(%r9)   # r5 = &_end
#endif
        cmpptrl %r5,%r3                 # if (__minbrk <= r3)
#ifdef __PPC_ISEL__
        iselgt  %r3,%r5,%r3
#else
        bgt     0f
        mr      %r5,%r3                 # r5 = r3
0:
        mr      %r3,%r5                 # new break value
#endif
        _DOSYSCALL(break)               # assume that r5 is preserved
        bso     1f
        stptr   %r5,__SIZEOF_POINTER__(%r9)
        blr                             # return 0

1:
        BRANCH_TO_CERROR()
END(_brk)