md-trap.hpp

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/* src/vm/jit/arm/md-trap.hpp - ARM hardware traps

   Copyright (C) 1996-2013
   CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO

   This file is part of CACAO.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2, or (at
   your option) any later version.

   This program 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
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
   02110-1301, USA.

*/


#ifndef MD_TRAP_HPP_
#define MD_TRAP_HPP_ 1

#include "config.h"


/**
 * Trap number defines.
 *
 * On this architecture (arm) we use illegal instructions as trap
 * instructions.  Since the illegal instruction with the value 1 is
 * used by the kernel to generate a SIGTRAP, we skip this one.
 */

#define TRAP_INSTRUCTION_IS_LOAD    0

enum {
    TRAP_NullPointerException           = 0,

    /* Skip 1 because it's the SIGTRAP illegal instruction. */

    TRAP_ArithmeticException            = 2,
    TRAP_ArrayIndexOutOfBoundsException = 3,
    TRAP_ArrayStoreException            = 4,
    TRAP_ClassCastException             = 5,
    TRAP_CHECK_EXCEPTION                = 6,
    TRAP_PATCHER                        = 7,
    TRAP_COMPILER                       = 8,
    TRAP_COUNTDOWN                      = 9,
    TRAP_AbstractMethodError            = 10,
    TRAP_THROW                          = 11,
    TRAP_NAT_EXCEPTION                  = 12
};


/**
 * Macro to fixup a compiler stub. The XPC is the RA minus 4,
 * because the RA points to the instruction after the call.
 */
#define MD_TRAP_COMPILER_FIXUP(xpc, ra, sp, pv) \
    do { \
        (xpc) = (void*) (((uintptr_t) (ra)) - 4); \
    } while(0)


#endif // MD_TRAP_HPP_


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