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/*
* \file trc_ret_stack.h
* \brief OpenCSD : trace decoder return stack feature.
*
* \copyright Copyright (c) 2017, ARM Limited. All Rights Reserved.
*/
/*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef ARM_TRC_RET_STACK_H_INCLUDED
#define ARM_TRC_RET_STACK_H_INCLUDED
#include "opencsd/ocsd_if_types.h"
// uncomment below for return stack logging
// #define TRC_RET_STACK_DEBUG
#ifdef TRC_RET_STACK_DEBUG
class TraceComponent;
#endif
typedef struct _retStackElement
{
ocsd_vaddr_t ret_addr;
ocsd_isa ret_isa;
} retStackElement;
class TrcAddrReturnStack
{
public:
TrcAddrReturnStack();
~TrcAddrReturnStack() {};
void set_active(bool active)
{
m_active = active;
};
bool is_active() const
{
return m_active;
};
void push(const ocsd_vaddr_t addr, const ocsd_isa isa);
ocsd_vaddr_t pop(ocsd_isa &isa);
void flush();
bool overflow() const
{
return (bool)(num_entries < 0);
};
void set_pop_pending()
{
if (m_active)
m_pop_pending = true;
}
void clear_pop_pending()
{
m_pop_pending = false;
}
bool pop_pending() const
{
return m_pop_pending;
};
private:
bool m_active;
bool m_pop_pending; // flag for decoder to indicate a pop might be needed depending on the next packet (ETMv4)
int head_idx;
int num_entries;
retStackElement m_stack[16];
#ifdef TRC_RET_STACK_DEBUG
public:
void set_dbg_logger(TraceComponent *pLogger) { m_p_debug_logger = pLogger; };
private:
void LogOp(const char *pszOpString, ocsd_vaddr_t addr, int head_off, ocsd_isa isa);
TraceComponent *m_p_debug_logger;
#endif // TRC_RET_STACK_DEBUG
};
#endif // ARM_TRC_RET_STACK_H_INCLUDED
/* End of File trc_ret_stack.h */
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