diff options
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/s390/brk.c')
| -rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/s390/brk.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/s390/brk.c b/REORG.TODO/sysdeps/unix/sysv/linux/s390/brk.c new file mode 100644 index 0000000000..2e5ad701ff --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/s390/brk.c @@ -0,0 +1,55 @@ +/* + Copyright (C) 2000-2017 Free Software Foundation, Inc. + Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). + 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/>. */ + +#include <errno.h> +#include <unistd.h> +#include <sysdep.h> + +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/x86 ELF + dynamic linker. Sigh. */ +weak_alias (__curbrk, ___brk_addr) + +int +__brk (void *addr) +{ + void *newbrk; + + { + register void *__addr __asm__("2") = addr; + + __asm__ ("svc %b1\n\t" /* call sys_brk */ + : "=d" (__addr) + : "I" (SYS_ify(brk)), "r" (__addr) + : "cc", "memory" ); + newbrk = __addr; + } + __curbrk = newbrk; + + if (newbrk < addr) + { + __set_errno (ENOMEM); + return -1; + } + + return 0; +} +weak_alias (__brk, brk) |