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- /* Copyright (C) 1991, 1992, 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 <ansidecl.h>
- #include <setjmp.h>
- #include <stdlib.h>
-
- #ifndef __GNUC__
- #error This file uses GNU C extensions; you must compile with GCC.
- #endif
-
- /* Jump to the position specified by ENV, causing the
- setjmp call there to return VAL, or 1 if VAL is 0. */
- __NORETURN
- void
- DEFUN(__longjmp, (env, val), CONST jmp_buf env AND 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]) :
- "fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7");
- #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 ();
- }
-