blob: aafe9673e3062cf8d9c0c676b4533078d0a66b95 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/* Change data segment. Linux SPARC version.
Copyright (C) 2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <unistd.h>
#include <sysdep.h>
/* This must be initialized data because commons can't have aliases. */
void *__curbrk = 0;
#if HAVE_INTERNAL_BRK_ADDR_SYMBOL
/* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt
to work around different old braindamage in the old Linux ELF dynamic
linker. */
weak_alias (__curbrk, ___brk_addr)
#endif
#ifdef __arch64__
# define SYSCALL_NUM "0x6d"
#else
# define SYSCALL_NUM "0x10"
#endif
int
__brk (void *addr)
{
register long int g1 asm ("g1") = __NR_brk;
register long int o0 asm ("o0") = (long int) addr;
asm volatile ("ta " SYSCALL_NUM
: "=r"(o0)
: "r"(g1), "0"(o0)
: "cc");
__curbrk = (void *) o0;
if (__curbrk < addr)
{
__set_errno (ENOMEM);
return -1;
}
return 0;
}
weak_alias (__brk, brk)
|
