projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| fd26970f | 1 | /* brk system call for Linux/SPARC. |
| 04277e02 | 2 | Copyright (C) 1995-2019 Free Software Foundation, Inc. |
| fd26970f UD |
3 | This file is part of the GNU C Library. |
| 4 | Contributed by Miguel de Icaza (miguel@nuclecu.unam.mx) | |
| 5 | ||
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
| 41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either | |
| 9 | version 2.1 of the License, or (at your option) any later version. | |
| fd26970f UD |
10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 14 | Lesser General Public License for more details. |
| fd26970f | 15 | |
| 41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| fd26970f UD |
19 | |
| 20 | #include <errno.h> | |
| 21 | #include <unistd.h> | |
| 22 | #include <sysdep.h> | |
| 23 | ||
| 24 | /* This must be initialized data because commons can't have aliases. */ | |
| 25 | void *__curbrk = 0; | |
| 26 | ||
| 27 | /* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt | |
| 28 | to work around different old braindamage in the old Linux ELF dynamic | |
| 29 | linker. */ | |
| 30 | weak_alias (__curbrk, ___brk_addr) | |
| 31 | ||
| 32 | int | |
| 33 | __brk (void *addr) | |
| 34 | { | |
| 9c4c0024 | 35 | void *newbrk; |
| fd26970f | 36 | |
| 489b7d4b RH |
37 | { |
| 38 | register void *o0 __asm__("%o0") = addr; | |
| 39 | register int g1 __asm__("%g1") = __NR_brk; | |
| 40 | __asm ("t 0x10" : "=r"(o0) : "r"(g1), "0"(o0) : "cc"); | |
| 41 | newbrk = o0; | |
| 42 | } | |
| fd26970f UD |
43 | |
| 44 | __curbrk = newbrk; | |
| 45 | ||
| 46 | if (newbrk < addr) | |
| 47 | { | |
| 48 | __set_errno (ENOMEM); | |
| 49 | return -1; | |
| 50 | } | |
| 51 | ||
| 52 | return 0; | |
| 53 | } | |
| 54 | weak_alias (__brk, brk) |