diff options
Diffstat (limited to 'decoder/source/trc_ret_stack.cpp')
| -rw-r--r-- | decoder/source/trc_ret_stack.cpp | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/decoder/source/trc_ret_stack.cpp b/decoder/source/trc_ret_stack.cpp new file mode 100644 index 000000000000..a56c6e6c1d60 --- /dev/null +++ b/decoder/source/trc_ret_stack.cpp @@ -0,0 +1,149 @@ +/* +* \file trc_ret_stack.cpp +* \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. +*/ +#include "common/trc_ret_stack.h" + +#ifdef TRC_RET_STACK_DEBUG +#include <sstream> +#include <iostream> +#include "common/trc_component.h" + +#define LOG_POP(A,O,I) LogOp("Pop",A,O,I) +#define LOG_PUSH(A,O,I) LogOp("Push",A,O,I) +#define LOG_FLUSH() LogOp("Flush",0,-1000,(const ocsd_isa)0) + +// uncomment for forced std::cout log, bypassing normal library debug logger. +// useful perhaps when perf is decoding w/o printing. +// #define FORCE_STD_COUT + +#else +#define LOG_POP(A,O,I) +#define LOG_PUSH(A,O,I) +#define LOG_FLUSH() +#endif + +TrcAddrReturnStack::TrcAddrReturnStack() : + m_active(false), + m_pop_pending(false), + head_idx(0), + num_entries(0) +{ +#ifdef TRC_RET_STACK_DEBUG + m_p_debug_logger = 0; +#endif +} + +void TrcAddrReturnStack::push(const ocsd_vaddr_t addr, const ocsd_isa isa) +{ + if (is_active()) + { + head_idx++; + head_idx &= 0xF; + m_stack[head_idx].ret_addr = addr; + m_stack[head_idx].ret_isa = isa; + num_entries++; + if (num_entries > 16) + num_entries = 16; + LOG_PUSH(addr,0,isa); + m_pop_pending = false; + } +} + +ocsd_vaddr_t TrcAddrReturnStack::pop(ocsd_isa &isa) +{ + ocsd_vaddr_t addr = (ocsd_vaddr_t)-1; + if (is_active()) + { + if (num_entries > 0) + { + addr = m_stack[head_idx].ret_addr; + isa = m_stack[head_idx].ret_isa; + head_idx--; + head_idx &= 0xF; + } + num_entries--; + LOG_POP(addr,1,isa); + m_pop_pending = false; + } + return addr; +} + + +void TrcAddrReturnStack::flush() +{ + num_entries = 0; + m_pop_pending = false; + LOG_FLUSH(); +} + +#ifdef TRC_RET_STACK_DEBUG +void TrcAddrReturnStack::LogOp(const char * pszOpString, ocsd_vaddr_t addr, int head_off, ocsd_isa isa) +{ + static const char *isa_names[] = + { + "A32", /**< V7 ARM 32, V8 AArch32 */ + "T32", /**< Thumb2 -> 16/32 bit instructions */ + "A64", /**< V8 AArch64 */ + "TEE", /**< Thumb EE - unsupported */ + "JZL", /**< Jazelle - unsupported in trace */ + "custom", /**< Instruction set - custom arch decoder */ + "unknown" /**< ISA not yet known */ + }; + + if (m_p_debug_logger) + { + std::ostringstream oss; + if(head_off == -1000) + { + oss << "Return stack " << pszOpString << "\n"; + } + else + { + int name_idx = (int)isa; + if (name_idx > 6) + name_idx = 6; + oss << "Return stack " << pszOpString << "[" << std::dec << (head_idx+head_off) << "](0x" << std::hex << addr << "), " << isa_names[name_idx] << ";"; + oss << "current entries = " << std::dec << num_entries << ";"; + oss << "new head idx = " << head_idx << ";"; + oss << "pop pend (pre op) = " << (m_pop_pending ? "true\n" : "false\n"); + } +#ifdef FORCE_STD_COUT + std::cout << oss.str(); + std::cout.flush(); +#endif + m_p_debug_logger->LogDefMessage(oss.str()); + } +} +#endif + +/* End of File trc_ret_stack.cpp */ |