1  /* Copyright (C) 1991-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library.  If not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <setjmp.h>
      19  #include <stdlib.h>
      20  
      21  /* Jump to the position specified by ENV, causing the
      22     setjmp call there to return VAL, or 1 if VAL is 0.  */
      23  void
      24  __longjmp (__jmp_buf env, int val)
      25  {
      26    /* This restores the FP and SP that setjmp's caller had,
      27       and puts the return address into A0 and VAL into D0. */
      28  
      29  #ifdef CHECK_SP
      30    CHECK_SP (env[0].__sp);
      31  #endif
      32  
      33  #if	defined(__HAVE_68881__) || defined(__HAVE_FPU__)
      34    /* Restore the floating-point registers.  */
      35    asm volatile("fmovem%.x %0, %/fp0-%/fp7" :
      36  	       /* No outputs.  */ : "g" (env[0].__fpregs[0]));
      37  #elif defined (__mcffpu__)
      38    asm volatile("fmovem %0, %/fp0-%/fp7" :
      39  	       /* No outputs.  */ : "m" (env[0].__fpregs[0]));
      40  #endif
      41  
      42    /* Put VAL in D0.  */
      43    asm volatile("move%.l %0, %/d0" : /* No outputs.  */ :
      44  	       "g" (val == 0 ? 1 : val) : "d0");
      45  
      46    asm volatile(/* Restore the data and address registers.  */
      47  	       "movem%.l %0, %/d1-%/d7/%/a0-%/a7\n"
      48  	       /* Return to setjmp's caller.  */
      49  #ifdef __motorola__
      50  	       "jmp (%/a0)"
      51  #else
      52  	       "jmp %/a0@"
      53  #endif
      54  	       : /* No outputs.  */ : "g" (env[0].__dregs[0])
      55  	       /* We don't bother with the clobbers,
      56  		  because this code always jumps out anyway.  */
      57  	       );
      58  
      59    /* Avoid `volatile function does return' warnings.  */
      60    for (;;);
      61  }