sysdeps/mach/hurd/alpha/longjmp-ts.c

   1 /* Perform a `longjmp' on a Mach thread_state.  Alpha version.
   2    Copyright (C) 2002 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <hurd/signal.h>
  21 #include <setjmp.h>
  22 #include <mach/thread_status.h>
  23
  24
  25 /* Set up STATE to do the equivalent of `longjmp (ENV, VAL);'.  */
  26
  27 void
  28 _hurd_longjmp_thread_state (void *state, jmp_buf env, int val)
  29 {
  30   struct alpha_thread_state *const ts = state;
  31
  32   ts->r9 = env[0].__jmpbuf[JB_S0];
  33   ts->r10 = env[0].__jmpbuf[JB_S1];
  34   ts->r11 = env[0].__jmpbuf[JB_S2];
  35   ts->r12 = env[0].__jmpbuf[JB_S3];
  36   ts->r13 = env[0].__jmpbuf[JB_S4];
  37   ts->r13 = env[0].__jmpbuf[JB_S5];
  38   ts->pc = env[0].__jmpbuf[JB_PC];
  39   ts->r15 = env[0].__jmpbuf[JB_FP];
  40   ts->r30 = env[0].__jmpbuf[JB_SP];
  41   ts->r0 = val ?: 1;
  42
  43   /* XXX
  44      To mimic longjmp we ought to restore some fp registers too.
  45      But those registers are in struct alpha_float_state.
  46      The only use of this is in fork, and it probably won't matter.
  47   */
  48 }