sh_stub.h

eCos1.31版

#ifndef CYGONCE_HAL_SH_STUB_H
#define CYGONCE_HAL_SH_STUB_H

//==========================================================================
//
//      sh_stub.h
//
//      SH stub defines
//
//==========================================================================
//####COPYRIGHTBEGIN####
//                                                                          
// -------------------------------------------                              
// The contents of this file are subject to the Red Hat eCos Public License 
// Version 1.1 (the "License"); you may not use this file except in         
// compliance with the License.  You may obtain a copy of the License at    
// http://www.redhat.com/                                                   
//                                                                          
// Software distributed under the License is distributed on an "AS IS"      
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
// License for the specific language governing rights and limitations under 
// the License.                                                             
//                                                                          
// The Original Code is eCos - Embedded Configurable Operating System,      
// released September 30, 1998.                                             
//                                                                          
// The Initial Developer of the Original Code is Red Hat.                   
// Portions created by Red Hat are                                          
// Copyright (C) 1998, 1999, 2000 Red Hat, Inc.                             
// All Rights Reserved.                                                     
// -------------------------------------------                              
//                                                                          
//####COPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    jskov
// Contributors: jskov,
// Date:         1999-05-18
// Purpose:      Define SH stub stuff
//
//####DESCRIPTIONEND####
//
//==========================================================================

#include <cyg/hal/hal_intr.h>           // CYGNUM_HAL_EXCEPTION_TRAP

#ifdef __cplusplus
extern "C" {
#endif

#define NUMREGS    59

#define REGSIZE( _x_ ) (4)

typedef unsigned long target_register_t;

enum regnames {
    R0, R1, R2, R3, R4, R5, R6, R7, 
    R8, R9, R10, R11, R12, R13, R14, R15,
    PC, PR, GBR, VBR, MACH, MACL, SR,
    FPUL, FPSCR,
    FP0, FP1, FP2, FP3, FP4, FP5, FP6, FP7,
    FP8, FP9, FP10, FP11, FP12, FP13, FP14, FP15,
    SSR, SPC, ROB0, ROB1
};

// For convenience
#define SP              R15
#define FP              R14

typedef enum regnames regnames_t;

/* Given a trap value TRAP, return the corresponding signal. */
extern int __computeSignal (unsigned int trap_number);

/* Return the SPARC trap number corresponding to the last-taken trap. */
extern int __get_trap_number (void);

/* Return the currently-saved value corresponding to register REG. */
extern target_register_t get_register (regnames_t reg);

/* Store VALUE in the register corresponding to WHICH. */
extern void put_register (regnames_t which, target_register_t value);

/* Set the currently-saved pc register value to PC. This also updates NPC
   as needed. */
extern void set_pc (target_register_t pc);

/* Set things up so that the next user resume will execute one instruction.
   This may be done by setting breakpoints or setting a single step flag
   in the saved user registers, for example. */
void __single_step (void);

/* Clear the single-step state. */
void __clear_single_step (void);

/* If the breakpoint we hit is in the breakpoint() instruction, return a
   non-zero value. */
extern int __is_breakpoint_function (void);

/* Skip the current instruction. */
extern void __skipinst (void);

extern void __install_breakpoints (void);

extern void __clear_breakpoints (void);

// We have to rewind the PC in case of a breakpoint.
#define HAL_STUB_PLATFORM_STUBS_FIXUP()                         \
    CYG_MACRO_START                                             \
    if (CYGNUM_HAL_EXCEPTION_TRAP == __get_trap_number())       \
        put_register(PC, get_register(PC) - 2);                 \
    CYG_MACRO_END

#ifdef __cplusplus
}   /* extern "C" */
#endif

#endif // ifndef CYGONCE_HAL_PPC_STUB_H