1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
/* Copyright (C) 1991, 1992, 1993, 1994, 1995 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 <setjmp.h>
#include <stdlib.h>
/* Jump to the position specified by ENV, causing the
setjmp call there to return VAL, or 1 if VAL is 0. */
void
__longjmp (__jmp_buf env, int val)
{
/* This restores the FP and SP that setjmp's caller had,
and puts the return address into A0 and VAL into D0. */
#if defined(__HAVE_68881__) || defined(__HAVE_FPU__)
/* Restore the floating-point registers. */
asm volatile("fmovem%.x %0, %/fp0-%/fp7" :
/* No outputs. */ : "g" (env[0].__fpregs[0]));
#endif
/* Put VAL in D0. */
asm volatile("move%.l %0, %/d0" : /* No outputs. */ :
"g" (val == 0 ? 1 : val) : "d0");
asm volatile(/* Restore the data and address registers. */
"movem%.l %0, %/d1-%/d7/%/a0-%/a7\n"
/* Return to setjmp's caller. */
#ifdef __motorola__
"jmp (%/a0)"
#else
"jmp %/a0@"
#endif
: /* No outputs. */ : "g" (env[0].__dregs[0])
/* We don't bother with the clobbers,
because this code always jumps out anyway. */
);
/* This call avoids `volatile function does return' warnings. */
abort ();
}
|
