| /* brk system call for Linux/i386. |
| Copyright (C) 1995-2018 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 |
| <http://www.gnu.org/licenses/>. */ |
| |
| #if BUILD_PIE_DEFAULT |
| /* Can't use "call *%gs:SYSINFO_OFFSET" during statup in static PIE. */ |
| # define I386_USE_SYSENTER 0 |
| #endif |
| |
| #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) |
| { |
| INTERNAL_SYSCALL_DECL (err); |
| void *newbrk = (void *) INTERNAL_SYSCALL (brk, err, 1, addr); |
| __curbrk = newbrk; |
| if (newbrk < addr) |
| return INLINE_SYSCALL_ERROR_RETURN_VALUE (ENOMEM); |
| return 0; |
| } |
| weak_alias (__brk, brk) |
