diff options
Diffstat (limited to 'sysdeps/m68k/bsd-_setjmp.S')
| -rw-r--r-- | sysdeps/m68k/bsd-_setjmp.S | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/sysdeps/m68k/bsd-_setjmp.S b/sysdeps/m68k/bsd-_setjmp.S new file mode 100644 index 0000000000..a0b639306d --- /dev/null +++ b/sysdeps/m68k/bsd-_setjmp.S @@ -0,0 +1,42 @@ +/* BSD `_setjmp' entry point to `sigsetjmp (..., 0)'. m68k version. +Copyright (C) 1994 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 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. */ + +/* This just does a tail-call to `__sigsetjmp (ARG, 0)'. + We cannot do it in C because it must be a tail-call, so frame-unwinding + in setjmp doesn't clobber the state restored by longjmp. */ + +#include <sysdep.h> + +#ifdef MOTOROLA_SYNTAX +#define d0 %d0 +#define d1 %d1 +#define PUSH(reg) move.l reg, -(%esp) +#define POP(reg) move.l (%esp)+, reg +#else +#define PUSH(reg) movel reg, sp@- +#define POP(reg) movel sp@+, reg +#endif + +ENTRY (_setjmp) + POP (d0) /* Pop return PC. */ + POP (d1) /* Pop jmp_buf argument. */ + PUSH (#0) /* Push second argument of zero. */ + PUSH (d1) /* Push back first argument. */ + PUSH (d0) /* Push back return PC. */ + jmp C_SYMBOL_NAME (__sigsetjmp) |