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//========================================================================

//

//      h8s_stub.c

//

//      Helper functions for H8S stub

//

//========================================================================

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//

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// the terms of the GNU General Public License as published by the Free     

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// for more details.                                                        

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//

// As a special exception, if other files instantiate templates or use      

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//========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):     Yoshinori Sato

// Contributors:  Yoshinori Sato

// Date:          2002-05-03

// Purpose:       

// Description:   Helper functions for H8S stub

// Usage:         

//

//####DESCRIPTIONEND####

//

//========================================================================

#include <stddef.h>

#include <pkgconf/hal.h>

#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS

#include <cyg/hal/hal_stub.h>

#include <cyg/hal/hal_arch.h>

#include <cyg/hal/hal_intr.h>

#ifdef CYGDBG_HAL_DEBUG_GDB_THREAD_SUPPORT

#include <cyg/hal/dbg-threads-api.h>    // dbg_currthread_id

#endif

/*--------------------------------------------------------------------*/

/* Given a trap value TRAP, return the corresponding signal. */

int __computeSignal (unsigned int trap_number)

{

    switch (trap_number) {

    case CYGNUM_HAL_VECTOR_TRACE:

    case CYGNUM_HAL_VECTOR_TRAP3:

        return SIGTRAP;

    default:

        return SIGINT;

    }

}

/*--------------------------------------------------------------------*/

/* Return the trap number corresponding to the last-taken trap. */

int __get_trap_number (void)

{

    extern int CYG_LABEL_NAME(_intvector);

    // The vector is not not part of the GDB register set so get it

    // directly from the save context.

    return CYG_LABEL_NAME(_intvector);

}

/*--------------------------------------------------------------------*/

/* Set the currently-saved pc register value to PC. This also updates NPC

   as needed. */

void set_pc (target_register_t pc)

{

    put_register (PC, pc);

}

/*----------------------------------------------------------------------

 * Single-step support.

 */

/* Clear any single-step breakpoint(s) that may have been set.  */

void __clear_single_step (void)

{

    int exr;

    exr = get_register(EXR);

    exr &= 0x7f;  /* clear T flag */

    put_register(EXR,exr);

}

/* Set breakpoint(s) to simulate a single step from the current PC.  */

void __single_step (void)

{

    int exr;

    exr = get_register(EXR);

    exr |= 0x80;  /* set T flag */

    put_register(EXR,exr);

}

void __install_breakpoints (void)

{

    /* NOP since single-step HW exceptions are used instead of

       breakpoints. */

}

void __clear_breakpoints (void)

{

}

/* If the breakpoint we hit is in the breakpoint() instruction, return a

   non-zero value. */

externC void CYG_LABEL_NAME(breakinst)(void);

int

__is_breakpoint_function ()

{

    return get_register (PC) == (target_register_t)&CYG_LABEL_NAME(breakinst);

}

/* Skip the current instruction. */

/* only TRAPA instruction */

void __skipinst (void)

{

    put_register (PC, get_register(PC) + 2);

}

#endif // CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS