| /* brk system call for Linux/SPARC. |
| Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Miguel de Icaza (miguel@nuclecu.unam.mx) |
| |
| 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <errno.h> |
| #include <unistd.h> |
| #include <sysdep.h> |
| |
| /* This must be initialized data because commons can't have aliases. */ |
| void *__curbrk = 0; |
| |
| /* 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) |
| |
| int |
| __brk (void *addr) |
| { |
| void *newbrk; |
| |
| { |
| register void *o0 __asm__("%o0") = addr; |
| register int g1 __asm__("%g1") = __NR_brk; |
| __asm ("t 0x10" : "=r"(o0) : "r"(g1), "0"(o0) : "cc"); |
| newbrk = o0; |
| } |
| |
| __curbrk = newbrk; |
| |
| if (newbrk < addr) |
| { |
| __set_errno (ENOMEM); |
| return -1; |
| } |
| |
| return 0; |
| } |
| weak_alias (__brk, brk) |
