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- /* Copyright (C) 1991, 1993 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. */
-
- #include <sysdep.h>
- #ifdef __svr4__
- #include <sys/trap.h>
- #else
- #include <machine/trap.h>
- #endif
-
- /* NOTE: This code depends on the definition of `__jmp_buf' in <jmp_buf.h>. */
-
- ENTRY (__longjmp)
- /* Do a "flush register windows trap". The trap handler in the
- kernel writes all the register windows to their stack slots, and
- marks them all as invalid (needing to be sucked up from the
- stack when used). This ensures that all information needed to
- unwind to these callers is in memory, not in the register
- windows. */
- ta ST_FLUSH_WINDOWS
- ld [%o0], %o7 /* Return PC. */
- ld [%o0 + 4], %fp /* Saved SP. */
- sub %fp, 64, %sp /* Allocate a register save area. */
-
- /* if (%o1 == 0) %o1 = 1; */
- tst %o1
- be,a Ldone
- mov 1, %o1
-
- Ldone: retl
- /* On the way out, put the return value in %o0. */
- restore %o1, 0, %o0
-