diff options
Diffstat (limited to 'ports/sysdeps/unix/sysv/linux/mips/brk.c')
| -rw-r--r-- | ports/sysdeps/unix/sysv/linux/mips/brk.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/mips/brk.c b/ports/sysdeps/unix/sysv/linux/mips/brk.c new file mode 100644 index 0000000000..9f63698e90 --- /dev/null +++ b/ports/sysdeps/unix/sysv/linux/mips/brk.c @@ -0,0 +1,56 @@ +/* brk system call for Linux/MIPS. + Copyright (C) 2000, 2005, 2006 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/>. */ + +#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 long int res __asm__ ("$2"); + + asm ("move\t$4,%2\n\t" + "li\t%0,%1\n\t" + "syscall" /* Perform the system call. */ + : "=r" (res) + : "I" (SYS_ify (brk)), "r" (addr) + : "$4", "$7", __SYSCALL_CLOBBERS); + newbrk = (void *) res; + } + __curbrk = newbrk; + + if (newbrk < addr) + { + __set_errno (ENOMEM); + return -1; + } + + return 0; +} +weak_alias (__brk, brk) |