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a334319f | 1 | /* brk system call for Linux/MIPS. |
2c923c36 | 2 | Copyright (C) 2000, 2005 Free Software Foundation, Inc. |
478b92f0 | 3 | This file is part of the GNU C Library. |
28f540f4 | 4 | |
478b92f0 | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
28f540f4 | 9 | |
478b92f0 UD |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
28f540f4 | 14 | |
41bdb6e2 AJ |
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., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
28f540f4 | 19 | |
28f540f4 RM |
20 | #include <errno.h> |
21 | #include <unistd.h> | |
a334319f UD |
22 | #include <sysdep.h> |
23 | ||
24 | void *__curbrk = 0; | |
28f540f4 | 25 | |
a334319f UD |
26 | /* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt |
27 | to work around different old braindamage in the old Linux/x86 ELF | |
28 | dynamic linker. Sigh. */ | |
29 | weak_alias (__curbrk, ___brk_addr) | |
30 | ||
31 | int | |
32 | __brk (void *addr) | |
28f540f4 | 33 | { |
a334319f UD |
34 | void *newbrk; |
35 | ||
36 | { | |
37 | register long int res __asm__ ("$2"); | |
38 | ||
39 | asm ("move\t$4,%2\n\t" | |
2c923c36 | 40 | "li\t%0,%1\n\t" |
a334319f UD |
41 | "syscall" /* Perform the system call. */ |
42 | : "=r" (res) | |
2c923c36 | 43 | : "I" (SYS_ify (brk)), "r" (addr) |
a334319f UD |
44 | : "$4", "$7"); |
45 | newbrk = (void *) res; | |
46 | } | |
47 | __curbrk = newbrk; | |
48 | ||
49 | if (newbrk < addr) | |
28f540f4 | 50 | { |
a334319f | 51 | __set_errno (ENOMEM); |
28f540f4 RM |
52 | return -1; |
53 | } | |
54 | ||
a334319f | 55 | return 0; |
28f540f4 | 56 | } |
a334319f | 57 | weak_alias (__brk, brk) |