diff options
Diffstat (limited to 'sysdeps/unix/mips/brk.S')
| -rw-r--r-- | sysdeps/unix/mips/brk.S | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/sysdeps/unix/mips/brk.S b/sysdeps/unix/mips/brk.S new file mode 100644 index 0000000000..1754c0c4de --- /dev/null +++ b/sysdeps/unix/mips/brk.S @@ -0,0 +1,67 @@ +/* Copyright (C) 1992, 1995 Free Software Foundation, Inc. + Contributed by Brendan Kehoe (brendan@zen.org). + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <sysdep.h> + +#ifndef SYS_brk +#define SYS_brk 17 +#endif + +#ifndef HAVE_GNU_LD +#define __end end +#endif + +.data +.sdata +ENTRY(__curbrk) + .word __end + +.text +.set noreorder +.set noat + +ENTRY(__brk) + /* Minimum is one page. */ + lui v0, 4096 + lw v0, __end + nop + + /* If they ask for less than a page, givvem the whole + thing anyway. */ + sltu AT, a0, v0 + beq AT, zero, down1 + nop + move a0, v0 +down1: + li v0, SYS_brk + syscall + bne a3, zero, error + + /* Update __curbrk and exit cleanly. */ + lui AT, 4096 + sw a0, __curbrk + j ra + move v0, zero + + /* What a horrible way to die. */ +error: j syscall_error + nop + nop + nop + +weak_alias (__brk, brk) |