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bfff8b1b | 1 | /* Copyright (C) 2011-2017 Free Software Foundation, Inc. |
7756ba9d DH |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
15 | License along with the GNU C Library. If not, see | |
16 | <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #include <errno.h> | |
19 | #include <unistd.h> | |
20 | #include <sysdep.h> | |
21 | ||
22 | /* This must be initialized data because commons can't have aliases. */ | |
23 | void *__curbrk = 0; | |
24 | ||
25 | /* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt | |
26 | to work around different old braindamage in the old Linux ELF dynamic | |
27 | linker. */ | |
28 | weak_alias (__curbrk, ___brk_addr) | |
29 | ||
30 | int | |
31 | __brk (void *addr) | |
32 | { | |
33 | INTERNAL_SYSCALL_DECL (err); | |
34 | ||
35 | __curbrk = (void *) INTERNAL_SYSCALL (brk, err, 1, addr); | |
36 | if (__curbrk < addr) | |
37 | { | |
38 | __set_errno (ENOMEM); | |
39 | return -1; | |
40 | } | |
41 | ||
42 | return 0; | |
43 | } | |
44 | weak_alias (__brk, brk) |