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  
      20  /* Save the current program position in ENV and return 0.  */
      21  int
      22  inhibit_stack_protector
      23  #if defined BSD_SETJMP
      24  # undef setjmp
      25  # define savemask 1
      26  setjmp (jmp_buf env)
      27  #elif defined BSD__SETJMP
      28  # undef _setjmp
      29  # define savemask 0
      30  _setjmp (jmp_buf env)
      31  #else
      32  __sigsetjmp (jmp_buf env, int savemask)
      33  #endif
      34  {
      35    /* Save data registers D1 through D7.  */
      36    asm volatile ("movem%.l %/d1-%/d7, %0"
      37  		: : "m" (env[0].__jmpbuf[0].__dregs[0]));
      38  
      39    /* Save return address in place of register A0.  */
      40    env[0].__jmpbuf[0].__aregs[0] = __builtin_return_address (0);
      41  
      42    /* Save address registers A1 through A5.  */
      43    asm volatile ("movem%.l %/a1-%/a5, %0"
      44  		: : "m" (env[0].__jmpbuf[0].__aregs[1]));
      45  
      46    /* Save caller's FP, not our own.  */
      47    env[0].__jmpbuf[0].__fp = *(int **) __builtin_frame_address (0);
      48  
      49    /* Save caller's SP, not our own.  */
      50    env[0].__jmpbuf[0].__sp = (int *) __builtin_frame_address (0) + 2;
      51  
      52  #if defined __HAVE_68881__ || defined __HAVE_FPU__
      53    /* Save floating-point (68881) registers FP0 through FP7.  */
      54    asm volatile ("fmovem%.x %/fp0-%/fp7, %0"
      55  		: : "m" (env[0].__jmpbuf[0].__fpregs[0]));
      56  #elif defined (__mcffpu__)
      57    asm volatile ("fmovem %/fp0-%/fp7, %0"
      58  		: : "m" (env[0].__jmpbuf[0].__fpregs[0]));
      59  #endif
      60  
      61  #if IS_IN (rtld)
      62    /* In ld.so we never save the signal mask.  */
      63    return 0;
      64  #else
      65    /* Save the signal mask if requested.  */
      66    return __sigjmp_save (env, savemask);
      67  #endif
      68  }
      69  #if !defined BSD_SETJMP && !defined BSD__SETJMP
      70  libc_hidden_def (__sigsetjmp)
      71  #endif