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Diffstat (limited to 'sysdeps/sparc/__longjmp.S')
| -rw-r--r-- | sysdeps/sparc/__longjmp.S | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/sysdeps/sparc/__longjmp.S b/sysdeps/sparc/__longjmp.S new file mode 100644 index 0000000000..adff06e349 --- /dev/null +++ b/sysdeps/sparc/__longjmp.S @@ -0,0 +1,47 @@ +/* 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 |