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1/* brk system call for Linux/SH.
2 Copyright (C) 1999-2019 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, see
17 <http://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <unistd.h>
21#include <sysdep.h>
22
23/* This must be initialized data because commons can't have aliases. */
24void *__curbrk = 0;
25
26int
27__brk (void *addr)
28{
29 void *newbrk;
30 register long r3 asm ("%r3") = SYS_ify (brk);
31 register long r4 asm ("%r4") = (long)addr;
32
33 asm volatile ("trapa #0x11\n\t" SYSCALL_INST_PAD
34 : "=z"(newbrk)
35 : "r" (r3), "r" (r4));
36
37 __curbrk = newbrk;
38
39 if (newbrk < addr)
40 {
41 __set_errno (ENOMEM);
42 return -1;
43 }
44
45 return 0;
46}
47weak_alias (__brk, brk)
48

Warning: That file was not part of the compilation database. It may have many parsing errors.