diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/brk.c')
-rw-r--r-- | sysdeps/unix/sysv/linux/brk.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/brk.c b/sysdeps/unix/sysv/linux/brk.c new file mode 100644 index 0000000..0b6d6d0 --- /dev/null +++ b/sysdeps/unix/sysv/linux/brk.c @@ -0,0 +1,45 @@ +/* Change data segment. Linux generic version. + Copyright (C) 2020 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 + +int +__brk (void *addr) +{ + __curbrk = (void *) INTERNAL_SYSCALL_CALL (brk, addr); + if (__curbrk < addr) + { + __set_errno (ENOMEM); + return -1; + } + + return 0; +} +weak_alias (__brk, brk) |