sysdeps/unix/sysv/linux/ia64/brk.S

   1 /* brk system call for Linux/ia64
   2    Copyright (C) 1999-2019 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Written by Stéphane Eranian <eranian@hpl.hp.com> and
   5               Jes Sorensen, <Jes.Sorensen@cern.ch>, April 1999.
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, see
  19    <https://www.gnu.org/licenses/>.  */
  20
  21 #include <sysdep.h>
  22
  23 #include <asm/unistd.h>
  24 #include <asm/errno.h>
  25
  26         .global __curbrk
  27         .type __curbrk,@object
  28         .size __curbrk,8
  29         .data
  30         .align  8
  31 __curbrk:
  32         data8   0
  33
  34 weak_alias (__curbrk, ___brk_addr)
  35
  36 LEAF(__brk)
  37         .regstk 1, 0, 0, 0
  38         DO_CALL(__NR_brk)
  39         cmp.ltu p6, p0 = ret0, in0
  40         addl r9 = @ltoff(__curbrk), gp
  41         ;;
  42         ld8 r9 = [r9]
  43 (p6)    mov ret0 = ENOMEM
  44 (p6)    br.cond.spnt.few __syscall_error
  45         ;;
  46         st8 [r9] = ret0
  47         mov ret0 = 0
  48         ret
  49 END(__brk)
  50
  51 weak_alias (__brk, brk)