sysdeps/unix/sysv/linux/powerpc/powerpc64/brk.S

   1 /* brk system call for Linux.  PowerPC64 version.
   2    Copyright (C) 1995,96,97,99, 2000,02, 2006 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA
  18    02110-1301 USA.  */
  19
  20 #include <sysdep.h>
  21 #define _ERRNO_H        1
  22 #include <bits/errno.h>
  23 #include <bp-sym.h>
  24 #include <bp-asm.h>
  25
  26         .comm   __curbrk,8,8
  27         .section        ".toc","aw"
  28 .LC__curbrk:
  29         .tc __curbrk[TC],__curbrk
  30         .section ".text"
  31 ENTRY (BP_SYM (__brk))
  32         CALL_MCOUNT 1
  33         DISCARD_BOUNDS (r3)     /* the bounds are meaningless, so toss 'em.  */
  34
  35         stdu    r1,-64(r1)
  36         cfi_adjust_cfa_offset (64)
  37         std     r3,48(r1)
  38         DO_CALL(SYS_ify(brk))
  39         ld     r6,48(r1)
  40         ld      r5,.LC__curbrk@toc(r2)
  41         std     r3,0(r5)
  42         cmpld   r6,r3
  43         addi    r1,r1,64
  44         li      r3,0
  45         blelr+
  46         li      r3,ENOMEM
  47         b       JUMPTARGET(__syscall_error)
  48 END (BP_SYM (__brk))
  49
  50 weak_alias (BP_SYM (__brk), BP_SYM (brk))