1 /* Copyright (C) 1993-2012 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Brendan Kehoe <brendan@zen.org>, 1993.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library. If not, see
17 <http://www.gnu.org/licenses/>. */
19 /* __brk is a special syscall under Linux since it never returns an
20 error. Instead, the error condition is indicated by returning the old
21 break value (instead of the new, requested one). */
25 #include <bits/errno.h>
32 .type __curbrk,@object
48 cfi_adjust_cfa_offset (16)
56 /* Save the requested brk across the system call. */
64 cfi_adjust_cfa_offset (-16)
66 /* Be prepared for an OSF-style brk. */
67 bne a3, SYSCALL_ERROR_LABEL
70 /* Correctly handle the brk(0) query case. */
74 bne t0, SYSCALL_ERROR_LABEL
76 /* Update __curbrk and return cleanly. */
84 weak_alias (__brk, brk)