sysdeps/alpha/setjmp_aux.c

   1 /* Copyright (C) 1992, 1994 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 Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 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 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 /* Global register decls must come before any function defn.  */
  20
  21 register long int
  22   r9 asm ("$9"), r10 asm ("$10"), r11 asm ("$11"), r12 asm ("$12"),
  23   r13 asm ("$13"), r14 asm ("$14");
  24
  25 register long int *fp asm ("$15"), *sp asm ("$30"), *retpc asm ("$26");
  26
  27 #if 1                           /* XXX */
  28 register double
  29   f2 asm ("$f2"), f3 asm ("$f3"), f4 asm ("$f4"), f5 asm ("$f5"),
  30   f6 asm ("$f6"), f7 asm ("$f7"), f8 asm ("$f8"), f9 asm ("$f9");
  31 #endif
  32
  33
  34 #include <setjmp.h>
  35
  36
  37 /* Save the current program position in ENV and return 0.  */
  38 int
  39 __sigsetjmp_aux (sigjmp_buf env, int savemask, long int *sp, long int *fp)
  40 {
  41   /* Save the integer registers.  */
  42   env[0].__jmpbuf[0].__9 = r9;
  43   env[0].__jmpbuf[0].__10 = r10;
  44   env[0].__jmpbuf[0].__11 = r11;
  45   env[0].__jmpbuf[0].__12 = r12;
  46   env[0].__jmpbuf[0].__13 = r13;
  47   env[0].__jmpbuf[0].__14 = r14;
  48
  49 #if 1                           /* XXX */
  50   /* Save the floating point registers.  */
  51   env[0].__jmpbuf[0].__f2 = f2;
  52   env[0].__jmpbuf[0].__f3 = f3;
  53   env[0].__jmpbuf[0].__f4 = f4;
  54   env[0].__jmpbuf[0].__f5 = f5;
  55   env[0].__jmpbuf[0].__f6 = f6;
  56   env[0].__jmpbuf[0].__f7 = f7;
  57   env[0].__jmpbuf[0].__f8 = f8;
  58   env[0].__jmpbuf[0].__f9 = f9;
  59 #endif
  60
  61   /* Save the return address of our caller, where longjmp will jump to.  */
  62   env[0].__jmpbuf[0].__pc = retpc;
  63
  64   /* Save the FP and SP of our caller.  The __sigsetjmp entry point
  65      simply puts these in the argument registers for us to fetch.  */
  66   env[0].__jmpbuf[0].__fp = fp;
  67   env[0].__jmpbuf[0].__sp = sp;
  68
  69   /* Save the signal mask if requested.  */
  70   __sigjmp_save (env, savemask);
  71
  72   retpc = env[0].__jmpbuf[0].__pc;      /* restore ra, ugly... */
  73
  74   /* Return to the original caller of __sigsetjmp.  */
  75   return 0;
  76 }