Exemple #1
0
void cyg_hal_exception_handler(CYG_ADDRWORD vector, CYG_ADDRWORD data,
                               CYG_ADDRWORD stackpointer )
{
#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
    // Set the pointer to the registers of the current exception
    // context. At entry the GDB stub will expand the
    // HAL_SavedRegisters structure into a (bigger) register array.
    _hal_registers = (HAL_SavedRegisters *)stackpointer;

    __handle_exception();

#elif defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT) && \
      defined(CYGPKG_HAL_EXCEPTIONS)
    // We should decode the vector and pass a more appropriate
    // value as the second argument. For now we simply pass a
    // pointer to the saved registers. We should also divert
    // breakpoint and other debug vectors into the debug stubs.

    cyg_hal_deliver_exception( vector, stackpointer );

#else
    CYG_FAIL("Exception!!!");
#endif    
    return;
}
Exemple #2
0
void
exception_handler(HAL_SavedRegisters *regs)
{
#if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
//    diag_printf("Exception! Frame: %x\n", regs);
//    show_regs(regs);
    static int gdb_active;
    if (gdb_active == 0) {
        gdb_active = 1;
        _hal_registers = regs;
        __handle_exception();
        gdb_active = 0;
    }

#elif defined(CYGPKG_KERNEL_EXCEPTIONS)

    // We should decode the vector and pass a more appropriate
    // value as the second argument. For now we simply pass a
    // pointer to the saved registers. We should also divert
    // breakpoint and other debug vectors into the debug stubs.

    cyg_hal_deliver_exception( regs->vector, (CYG_ADDRWORD)regs );

#else

    CYG_FAIL("Exception!!!");
    
#endif    
    
    return;
}
Exemple #3
0
void hal_deliver_exception( HAL_SavedRegisters *regs )
{
    // Special case handler for code which has chosen to take care
    // of data exceptions (i.e. code which expects them to happen)
    // This is common in discovery code, e.g. checking for a particular
    // device which may generate an exception when probing if the
    // device is not present
#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
    if (__mem_fault_handler )
    {
        regs->u.exception.pc = (unsigned long)__mem_fault_handler;
        return; // Caught an exception inside stubs        
    }
#endif

#if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)

    _hal_registers = regs;
    __handle_exception();

#elif defined(CYGPKG_KERNEL_EXCEPTIONS)

    cyg_hal_deliver_exception( regs->u.exception.vector, (CYG_ADDRWORD)regs );

#else

    CYG_FAIL("Exception!!!");
    
#endif    
}
Exemple #4
0
void
exception_handler(HAL_SavedRegisters *regs)
{
    // Special case handler for code which has chosen to take care
    // of data exceptions (i.e. code which expects them to happen)
    // This is common in discovery code, e.g. checking for a particular
    // device which may generate an exception when probing if the
    // device is not present
#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
    if (__mem_fault_handler && 
        regs->vector == CYGNUM_HAL_EXCEPTION_DATA_ACCESS) {
        regs->pc = (unsigned long)__mem_fault_handler;
        return; // Caught an exception inside stubs        
    }
#endif

#if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS) && !defined(CYGPKG_CYGMON)
    if (++exception_level == 1) __take_over_debug_traps();

    _hal_registers = regs;
    __handle_exception();

    if (--exception_level == 0) __restore_debug_traps();

#elif defined(CYGPKG_KERNEL_EXCEPTIONS)

    // We should decode the vector and pass a more appropriate
    // value as the second argument. For now we simply pass a
    // pointer to the saved registers. We should also divert
    // breakpoint and other debug vectors into the debug stubs.

    cyg_hal_deliver_exception( regs->vector, (CYG_ADDRWORD)regs );

#else

    CYG_FAIL("Exception!!!");
    
#endif    
    
    return;
}