HIFIVE1-VP/riscv/src/internal/vm_riscv.in.cpp

////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2017, MINRES Technologies GmbH
// 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.
// 
// Contributors:
//       eyck@minres.com - initial API and implementation
//
//
////////////////////////////////////////////////////////////////////////////////

#include <iss/iss.h>
#include <iss/debugger/gdb_session.h>
#include <easylogging++.h>
#include <memory>
#include <cstring>

#include "iss/vm_base.h"
#include "iss/arch/CORE_DEF_NAME.h"
#include "iss/arch/riscv_core.h"
#include "iss/debugger/server.h"

#include <boost/format.hpp>

namespace iss {
namespace CORE_DEF_NAME {
using namespace iss::arch;
using namespace llvm;
using namespace iss::debugger;

template<typename ARCH>
struct vm_impl;

template<typename ARCH>
struct target_adapter: public target_adapter_base {

    target_adapter(server_if* srv, vm_impl<ARCH>* vm)
    : target_adapter_base(srv)
    , vm(vm)
    {
    }

    /*============== Thread Control ===============================*/

    /* Set generic thread */
    status set_gen_thread(rp_thread_ref& thread) override;

    /* Set control thread */
    status set_ctrl_thread(rp_thread_ref& thread) override;

    /* Get thread status */
    status is_thread_alive(rp_thread_ref& thread, bool& alive) override;

    /*============= Register Access ================================*/

    /* Read all registers. buf is 4-byte aligned and it is in
     target byte order. If  register is not available
     corresponding bytes in avail_buf are 0, otherwise
     avail buf is 1 */
    status read_registers(std::vector<uint8_t>& data, std::vector<uint8_t>& avail) override;

    /* Write all registers. buf is 4-byte aligned and it is in target
     byte order */
    status write_registers(const std::vector<uint8_t>& data) override;

    /* Read one register. buf is 4-byte aligned and it is in
     target byte order. If  register is not available
     corresponding bytes in avail_buf are 0, otherwise
     avail buf is 1 */
    status read_single_register(unsigned int reg_no, std::vector<uint8_t>& buf, std::vector<uint8_t>& avail_buf) override;

    /* Write one register. buf is 4-byte aligned and it is in target byte
     order */
    status write_single_register(unsigned int reg_no, const std::vector<uint8_t>& buf) override;

    /*=================== Memory Access =====================*/

    /* Read memory, buf is 4-bytes aligned and it is in target
     byte order */
    status read_mem(uint64_t addr, std::vector<uint8_t>& buf) override;

    /* Write memory, buf is 4-bytes aligned and it is in target
     byte order */
    status write_mem(uint64_t addr, const std::vector<uint8_t>& buf) override;

    status process_query(unsigned int& mask, const rp_thread_ref& arg, rp_thread_info& info) override;

    status thread_list_query(int first, const rp_thread_ref& arg, std::vector<rp_thread_ref>& result, size_t max_num, size_t& num, bool& done) override;

    status current_thread_query(rp_thread_ref& thread) override;

    status offsets_query(uint64_t& text, uint64_t& data, uint64_t& bss) override;

    status crc_query(uint64_t addr, size_t len, uint32_t& val) override;

    status raw_query(std::string in_buf, std::string& out_buf) override;

    status threadinfo_query(int first, std::string& out_buf) override;

    status threadextrainfo_query(const rp_thread_ref& thread, std::string& out_buf) override;

    status packetsize_query(std::string& out_buf) override;

    status add_break(int type, uint64_t addr, unsigned int length) override;

    status remove_break(int type, uint64_t addr, unsigned int length) override;

    status resume_from_addr(bool step, int sig, uint64_t addr) override;

protected:
    static inline constexpr addr_t map_addr(const addr_t& i){
        return i;
    }

    vm_impl<ARCH>* vm;
    rp_thread_ref thread_idx;
};

template<typename ARCH>
struct vm_impl: public vm::vm_base<ARCH> {
    using super       = typename vm::vm_base<ARCH>;
    using virt_addr_t = typename super::virt_addr_t;
    using phys_addr_t = typename super::phys_addr_t;
    using code_word_t = typename super::code_word_t;
    using addr_t      = typename super::addr_t ;

    vm_impl();

    vm_impl(ARCH& core, bool dump=false);

    void enableDebug(bool enable) {
        super::sync_exec=super::ALL_SYNC;
    }

    target_adapter_if* accquire_target_adapter(server_if* srv){
        debugger_if::dbg_enabled=true;
        if(vm::vm_base<ARCH>::tgt_adapter==nullptr)
            vm::vm_base<ARCH>::tgt_adapter=new target_adapter<ARCH>(srv, this);
        return vm::vm_base<ARCH>::tgt_adapter;
    }


protected:

    template<typename T> inline
    llvm::ConstantInt* size(T type){
        return llvm::ConstantInt::get(getContext(), llvm::APInt(32, type->getType()->getScalarSizeInBits()));
    }

    inline llvm::Value * gen_choose(llvm::Value * cond, llvm::Value * trueVal, llvm::Value * falseVal, unsigned size) const {
        return this->gen_cond_assign(cond, this->gen_ext(trueVal, size), this->gen_ext(falseVal, size));
    }

    std::tuple<vm::continuation_e, llvm::BasicBlock*> gen_single_inst_behavior(virt_addr_t&, unsigned int&, llvm::BasicBlock*) override;

    void gen_leave_behavior(llvm::BasicBlock* leave_blk) override;

    void gen_raise_trap(uint16_t trap_id, uint16_t cause);

    void gen_leave_trap(unsigned lvl);

    void gen_wait(unsigned type);

    void gen_trap_behavior(llvm::BasicBlock*) override;

    void gen_trap_check(llvm::BasicBlock* bb);

    inline
    void gen_set_pc(virt_addr_t pc, unsigned reg_num){
        llvm::Value* next_pc_v = this->builder->CreateSExtOrTrunc(this->gen_const(traits<ARCH>::XLEN, pc.val), this->get_type(traits<ARCH>::XLEN));
        this->builder->CreateStore(next_pc_v, get_reg_ptr(reg_num), true);
    }

    inline
    llvm::Value* get_reg_ptr(unsigned i){
        void* ptr = this->core.get_regs_base_ptr()+traits<ARCH>::reg_byte_offset(i);
        llvm::PointerType* ptrType=nullptr;
        switch (traits<ARCH>::reg_bit_width(i)>>3) {
        case 8:
            ptrType=llvm::Type::getInt64PtrTy(this->mod->getContext());
            break;
        case 4:
            ptrType=llvm::Type::getInt32PtrTy(this->mod->getContext());
            break;
        case 2:
            ptrType=llvm::Type::getInt16PtrTy(this->mod->getContext());
            break;
        case 1:
            ptrType=llvm::Type::getInt8PtrTy(this->mod->getContext());
            break;
        default:
            throw std::runtime_error("unsupported access with");
            break;
        }
        return llvm::ConstantExpr::getIntToPtr(
                llvm::ConstantInt::get(this->mod->getContext(), llvm::APInt(
                        8/*bits*/ * sizeof(uint8_t*),
                        reinterpret_cast<uint64_t>(ptr)
                )),
                ptrType);
    }

    inline
    void gen_set_pc(virt_addr_t pc){
        llvm::Value* pc_l = this->builder->CreateSExt(this->gen_const(traits<ARCH>::caddr_bit_width, (unsigned)pc), this->get_type(traits<ARCH>::caddr_bit_width));
        super::gen_set_reg(traits<ARCH>::PC, pc_l);
    }

    // some compile time constants
    enum {MASK16 = 0b1111110001100011, MASK32 = 0b11111111111100000111000001111111};
    enum {EXTR_MASK16 = MASK16>>2, EXTR_MASK32 = MASK32>>2};
    enum {LUT_SIZE =  1<< bit_count(EXTR_MASK32), LUT_SIZE_C = 1<<bit_count(EXTR_MASK16)};

    using this_class = vm_impl<ARCH>;
    using compile_func = std::tuple<vm::continuation_e, llvm::BasicBlock*> (this_class::*)(virt_addr_t& pc, code_word_t instr, llvm::BasicBlock* bb);
    compile_func lut[LUT_SIZE];

    std::array<compile_func, LUT_SIZE_C> lut_00, lut_01, lut_10;
    std::array<compile_func, LUT_SIZE> lut_11;

    compile_func* qlut[4];// = {lut_00, lut_01, lut_10, lut_11};

    const uint32_t lutmasks[4]={EXTR_MASK16, EXTR_MASK16, EXTR_MASK16, EXTR_MASK32};

    void expand_bit_mask(int pos, uint32_t mask, uint32_t value, uint32_t valid, uint32_t idx, compile_func lut[], compile_func f){
        if(pos<0){
            lut[idx]=f;
        } else {
            auto bitmask = 1UL<<pos;
            if((mask & bitmask)==0){
                expand_bit_mask(pos-1, mask, value, valid, idx, lut, f);
            } else {
                if((valid & bitmask) == 0) {
                    expand_bit_mask(pos-1, mask, value, valid, (idx<<1), lut, f);
                    expand_bit_mask(pos-1, mask, value, valid, (idx<<1)+1, lut, f);
                } else {
                    auto new_val = idx<<1;
                    if((value&bitmask)!=0)
                        new_val++;
                    expand_bit_mask(pos-1, mask, value, valid, new_val, lut, f);
                }
            }
        }
    }

    inline uint32_t extract_fields(uint32_t val){
        return extract_fields(29, val>>2, lutmasks[val&0x3], 0);
    }

    uint32_t extract_fields(int pos, uint32_t val, uint32_t mask, uint32_t lut_val){
        if(pos>=0) {
            auto bitmask = 1UL<<pos;
            if((mask & bitmask)==0){
                lut_val = extract_fields(pos-1, val, mask, lut_val);
            } else {
                auto new_val = lut_val<<1;
                if((val&bitmask)!=0)
                    new_val++;
                lut_val = extract_fields(pos-1, val, mask, new_val);
            }
        }
        return lut_val;
    }

private:
    /****************************************************************************
     * start opcode definitions
     ****************************************************************************/
    struct InstructionDesriptor {
        size_t   length;
        uint32_t value;
        uint32_t mask;
        compile_func op;
    };

    /* «start generated code» */
    InstructionDesriptor instr_descr[0] = {};
    /* «end generated code»  */
    /****************************************************************************
     * end opcode definitions
     ****************************************************************************/
    std::tuple<vm::continuation_e, llvm::BasicBlock*> illegal_intruction(virt_addr_t& pc, code_word_t instr, llvm::BasicBlock* bb){
        //this->gen_sync(iss::PRE_SYNC);
        this->builder->CreateStore(
            this->builder->CreateLoad(get_reg_ptr(traits<ARCH>::NEXT_PC), true),
            get_reg_ptr(traits<ARCH>::PC), true);
        this->builder->CreateStore(
            this->builder->CreateAdd(
                this->builder->CreateLoad(get_reg_ptr(traits<ARCH>::ICOUNT), true),
                this->gen_const(64U, 1)),
            get_reg_ptr(traits<ARCH>::ICOUNT), true);
        if(this->debugging_enabled()) this->gen_sync(iss::PRE_SYNC);
        pc=pc+((instr&3) == 3?4:2);
        this->gen_raise_trap(0, 2); // illegal instruction trap
        this->gen_sync(iss::POST_SYNC); /* call post-sync if needed */
        this->gen_trap_check(this->leave_blk);
        return std::make_tuple(iss::vm::BRANCH, nullptr);
    }

};

template<typename CODE_WORD>
void debug_fn(CODE_WORD insn){
    volatile CODE_WORD x=insn;
    insn=2*x;
}

template<typename ARCH>
vm_impl<ARCH>::vm_impl(){
    this(new ARCH());
}

template<typename ARCH>
vm_impl<ARCH>::vm_impl(ARCH& core, bool dump) : vm::vm_base<ARCH>(core, dump) {
    qlut[0] = lut_00.data();
    qlut[1] = lut_01.data();
    qlut[2] = lut_10.data();
    qlut[3] = lut_11.data();
    for(auto instr: instr_descr){
        auto quantrant = instr.value&0x3;
        expand_bit_mask(29, lutmasks[quantrant], instr.value>>2, instr.mask>>2, 0, qlut[quantrant], instr.op);
    }
    this->sync_exec=static_cast<sync_type>(this->sync_exec|core.needed_sync());
}

template<typename ARCH>
std::tuple<vm::continuation_e, llvm::BasicBlock*> vm_impl<ARCH>::gen_single_inst_behavior(virt_addr_t& pc, unsigned int& inst_cnt, llvm::BasicBlock* this_block){
    // we fetch at max 4 byte, alignment is 2
    code_word_t insn = 0;
    iss::addr_t paddr;
    const typename traits<ARCH>::addr_t upper_bits = ~traits<ARCH>::PGMASK;
    try {
    uint8_t* const data = (uint8_t*)&insn;
        paddr=this->core.v2p(pc);
        if((pc.val&upper_bits) != ((pc.val+2)&upper_bits)){ // we may cross a page boundary
            auto res = this->core.read(paddr, 2, data);
            if(res!=iss::Ok)
                throw trap_access(1, pc.val);
            if((insn & 0x3) == 0x3){ // this is a 32bit instruction
                res = this->core.read(this->core.v2p(pc+2), 2, data+2);
            }
    } else {
            auto res = this->core.read(paddr, 4, data);
            if(res!=iss::Ok)
                throw trap_access(1, pc.val);
        }
    } catch(trap_access& ta){
        throw trap_access(ta.id, pc.val);
    }
    if(insn==0x0000006f)
        throw simulation_stopped(0);
    // curr pc on stack
    typename vm_impl<ARCH>::processing_pc_entry addr(*this, pc, paddr);
    ++inst_cnt;
    auto lut_val = extract_fields(insn);
    auto f = qlut[insn&0x3][lut_val];
    if (f==nullptr){
        f=&this_class::illegal_intruction;
    }
    return (this->*f)(pc, insn, this_block);
}

template<typename ARCH>
void vm_impl<ARCH>::gen_leave_behavior(llvm::BasicBlock* leave_blk){
    this->builder->SetInsertPoint(leave_blk);
    this->builder->CreateRet(this->builder->CreateLoad(get_reg_ptr(arch::traits<ARCH>::NEXT_PC), false));
}

template<typename ARCH>
void vm_impl<ARCH>::gen_raise_trap(uint16_t trap_id, uint16_t cause){
    auto* TRAP_val = this->gen_const(traits<ARCH>::XLEN, 0x80<<24| (cause<<16) | trap_id  );
    this->builder->CreateStore(TRAP_val, get_reg_ptr(traits<ARCH>::TRAP_STATE), true);
}

template<typename ARCH>
void vm_impl<ARCH>::gen_leave_trap(unsigned lvl){
    std::vector<llvm::Value*> args {
        this->core_ptr,
        llvm::ConstantInt::get(getContext(), llvm::APInt(64, lvl)),
    };
    this->builder->CreateCall(this->mod->getFunction("leave_trap"), args);
    auto* PC_val = this->gen_read_mem(traits<ARCH>::CSR, (lvl<<8)+0x41, traits<ARCH>::XLEN/8);
    this->builder->CreateStore(PC_val, get_reg_ptr(traits<ARCH>::NEXT_PC), false);
}

template<typename ARCH>
void vm_impl<ARCH>::gen_wait(unsigned type){
    std::vector<llvm::Value*> args {
        this->core_ptr,
        llvm::ConstantInt::get(getContext(), llvm::APInt(64, type)),
    };
    this->builder->CreateCall(this->mod->getFunction("wait"), args);
}

template<typename ARCH>
void vm_impl<ARCH>::gen_trap_behavior(llvm::BasicBlock* trap_blk){
    this->builder->SetInsertPoint(trap_blk);
    auto* trap_state_val = this->builder->CreateLoad(get_reg_ptr(traits<ARCH>::TRAP_STATE), true);
    std::vector<llvm::Value*> args {
        this->core_ptr,
        this->adj_to64(trap_state_val),
        this->adj_to64(this->builder->CreateLoad(get_reg_ptr(traits<ARCH>::PC), false))
    };
    this->builder->CreateCall(this->mod->getFunction("enter_trap"), args);
    auto* trap_addr_val = this->builder->CreateLoad(get_reg_ptr(traits<ARCH>::NEXT_PC), false);
    this->builder->CreateRet(trap_addr_val);
}

template<typename ARCH> inline
void vm_impl<ARCH>::gen_trap_check(llvm::BasicBlock* bb){
    auto* v = this->builder->CreateLoad(get_reg_ptr(arch::traits<ARCH>::TRAP_STATE), true);
    this->gen_cond_branch(
            this->builder->CreateICmp(
                    ICmpInst::ICMP_EQ,
                    v,
                    llvm::ConstantInt::get(getContext(), llvm::APInt(v->getType()->getIntegerBitWidth(), 0))),
                    bb,
                    this->trap_blk, 1);
}

} // namespace CORE_DEF_NAME

#define CREATE_FUNCS(ARCH) \
template<> std::unique_ptr<vm_if> create<ARCH>(ARCH* core, unsigned short port, bool dump) {\
    std::unique_ptr<CORE_DEF_NAME::vm_impl<ARCH> > ret = std::make_unique<CORE_DEF_NAME::vm_impl<ARCH> >(*core, dump);\
    debugger::server<debugger::gdb_session>::run_server(ret.get(), port);\
    return ret;\
}\
template<> std::unique_ptr<vm_if> create<ARCH>(std::string inst_name, unsigned short port, bool dump) {\
    return create<ARCH>(new arch::riscv_core<ARCH>(), port, dump); /* FIXME: memory leak!!!!!!! */\
}\
template<> std::unique_ptr<vm_if> create<ARCH>(ARCH* core, bool dump) {\
    return std::make_unique<CORE_DEF_NAME::vm_impl<ARCH> >(*core, dump); /* FIXME: memory leak!!!!!!! */ \
}\
template<> std::unique_ptr<vm_if> create<ARCH>(std::string inst_name, bool dump) { \
    return create<ARCH>(new arch::riscv_core<ARCH>(), dump);\
}

CREATE_FUNCS(arch::CORE_DEF_NAME)

namespace CORE_DEF_NAME {

    template<typename ARCH>
    status target_adapter<ARCH>::set_gen_thread(rp_thread_ref& thread) {
        thread_idx=thread;
        return Ok;
    }

    template<typename ARCH>
    status target_adapter<ARCH>::set_ctrl_thread(rp_thread_ref& thread) {
        thread_idx=thread;
        return Ok;
    }

    template<typename ARCH>
    status target_adapter<ARCH>::is_thread_alive(rp_thread_ref& thread, bool& alive) {
        alive=1;
        return Ok;
    }

    /* List threads. If first is non-zero then start from the first thread,
     * otherwise start from arg, result points to array of threads to be
     * filled out, result size is number of elements in the result,
     * num points to the actual number of threads found, done is
     * set if all threads are processed.
     */
    template<typename ARCH>
    status target_adapter<ARCH>::thread_list_query(int first, const rp_thread_ref& arg, std::vector<rp_thread_ref>& result, size_t max_num,
            size_t& num, bool& done) {
        if(first==0){
            result.clear();
            result.push_back(thread_idx);
            num=1;
            done=true;
            return Ok;
        } else
            return NotSupported;
    }

    template<typename ARCH>
    status target_adapter<ARCH>::current_thread_query(rp_thread_ref& thread) {
        thread=thread_idx;
        return Ok;
    }

    template<typename ARCH>
    status target_adapter<ARCH>::read_registers(std::vector<uint8_t>& data, std::vector<uint8_t>& avail) {
        LOG(TRACE)<<"reading target registers";
        //return idx<0?:;
        data.clear();
        avail.clear();
        std::vector<uint8_t> reg_data;
        for(size_t reg_no = 0; reg_no < arch::traits<ARCH>::NUM_REGS; ++reg_no){
            auto reg_bit_width = arch::traits<ARCH>::reg_bit_width(static_cast<typename arch::traits<ARCH>::reg_e>(reg_no));
            auto reg_width=reg_bit_width/8;
            reg_data.resize(reg_width);
            vm->get_arch()->get_reg(reg_no, reg_data);
            for(size_t j=0; j<reg_data.size(); ++j){
                data.push_back(reg_data[j]);
                avail.push_back(0xff);
            }
        }
        // work around fill with F type registers
        if(arch::traits<ARCH>::NUM_REGS < 65){
            auto reg_width=sizeof(typename arch::traits<ARCH>::reg_t);
            for(size_t reg_no = 0; reg_no < 33; ++reg_no){
                for(size_t j=0; j<reg_width; ++j){
                    data.push_back(0x0);
                    avail.push_back(0x00);
                }
            }
        }
        return Ok;
    }

    template<typename ARCH>
    status target_adapter<ARCH>::write_registers(const std::vector<uint8_t>& data) {
        size_t data_index=0;
        auto reg_count=arch::traits<ARCH>::NUM_REGS;
        std::vector<uint8_t> reg_data;
        for(size_t reg_no = 0; reg_no < reg_count; ++reg_no){
            auto reg_bit_width = arch::traits<ARCH>::reg_bit_width(static_cast<typename arch::traits<ARCH>::reg_e>(reg_no));
            auto reg_width=reg_bit_width/8;
            vm->get_arch()->set_reg(reg_no, std::vector<uint8_t>(data.begin()+data_index, data.begin()+data_index+reg_width));
            data_index+=reg_width;
        }
        return Ok;
    }

    template<typename ARCH>
    status target_adapter<ARCH>::read_single_register(unsigned int reg_no, std::vector<uint8_t>& data, std::vector<uint8_t>& avail) {
        if(reg_no<65){
            //auto reg_size = arch::traits<ARCH>::reg_bit_width(static_cast<typename arch::traits<ARCH>::reg_e>(reg_no))/8;
            data.resize(0);
            vm->get_arch()->get_reg(reg_no, data);
            avail.resize(data.size());
            std::fill(avail.begin(), avail.end(), 0xff);
        } else {
            typed_addr_t<iss::PHYSICAL> a(iss::DEBUG_READ, traits<ARCH>::CSR, reg_no-65);
            data.resize(sizeof(typename traits<ARCH>::reg_t));
            avail.resize(sizeof(typename traits<ARCH>::reg_t));
            std::fill(avail.begin(), avail.end(), 0xff);
            vm->get_arch()->read(a, data.size(), data.data());
        }
        return data.size()>0?Ok:Err;
    }

    template<typename ARCH>
    status target_adapter<ARCH>::write_single_register(unsigned int reg_no, const std::vector<uint8_t>& data) {
        if(reg_no<65)
            vm->get_arch()->set_reg(reg_no, data);
        else {
            typed_addr_t<iss::PHYSICAL> a(iss::DEBUG_WRITE, traits<ARCH>::CSR, reg_no-65);
            vm->get_arch()->write(a, data.size(), data.data());
        }
        return Ok;
    }

    template<typename ARCH>
    status target_adapter<ARCH>::read_mem(uint64_t addr, std::vector<uint8_t>& data) {
        auto a=map_addr({iss::DEBUG_READ, iss::VIRTUAL, 0, addr});
        auto f = [&]()->status {
            return vm->get_arch()->read(a, data.size(), data.data());
        };
        return srv->execute_syncronized(f);

    }

    template<typename ARCH>
    status target_adapter<ARCH>::write_mem(uint64_t addr, const std::vector<uint8_t>& data) {
        auto a=map_addr({iss::DEBUG_READ, iss::VIRTUAL, 0, addr});
        return srv->execute_syncronized(&arch_if::write, vm->get_arch(), a, data.size(), data.data());
    }

    template<typename ARCH>
    status target_adapter<ARCH>::process_query(unsigned int& mask, const rp_thread_ref& arg, rp_thread_info& info) {
        return NotSupported;
    }

    template<typename ARCH>
    status target_adapter<ARCH>::offsets_query(uint64_t& text, uint64_t& data, uint64_t& bss) {
        text=0;
        data=0;
        bss=0;
        return Ok;
    }

    template<typename ARCH>
    status target_adapter<ARCH>::crc_query(uint64_t addr, size_t len, uint32_t&  val) {
        return NotSupported;
    }

    template<typename ARCH>
    status target_adapter<ARCH>::raw_query(std::string in_buf, std::string& out_buf) {
        return NotSupported;
    }

    template<typename ARCH>
    status target_adapter<ARCH>::threadinfo_query(int first, std::string& out_buf) {
        if(first){
            std::stringstream ss;
            ss<<"m"<<std::hex<<thread_idx.val;
            out_buf=ss.str();
        } else {
            out_buf="l";
        }
        return Ok;
    }

    template<typename ARCH>
    status target_adapter<ARCH>::threadextrainfo_query(const rp_thread_ref& thread, std::string& out_buf) {
        char buf[20];
        memset(buf, 0, 20);
        sprintf (buf, "%02x%02x%02x%02x%02x%02x%02x%02x%02x", 'R', 'u', 'n', 'n', 'a', 'b', 'l', 'e', 0);
        out_buf=buf;
        return Ok;
    }

    template<typename ARCH>
    status target_adapter<ARCH>::packetsize_query(std::string& out_buf) {
        out_buf="PacketSize=1000";
        return Ok;
    }

    template<typename ARCH>
    status target_adapter<ARCH>::add_break(int type, uint64_t addr, unsigned int length) {
        auto saddr=map_addr({iss::CODE, iss::PHYSICAL, addr});
        auto eaddr=map_addr({iss::CODE, iss::PHYSICAL, addr+length});
        target_adapter_base::bp_lut.addEntry(++target_adapter_base::bp_count, saddr.val, eaddr.val-saddr.val);
        LOG(TRACE)<<"Adding breakpoint with handle "<<target_adapter_base::bp_count<<" for addr 0x"<<std::hex<<saddr.val<<std::dec;
        LOG(TRACE)<<"Now having "<<target_adapter_base::bp_lut.size()<<" breakpoints";
        return Ok;
    }

    template<typename ARCH>
    status target_adapter<ARCH>::remove_break(int type, uint64_t addr, unsigned int length) {
        auto saddr=map_addr({iss::CODE, iss::PHYSICAL, addr});
        unsigned handle=target_adapter_base::bp_lut.getEntry(saddr.val);
        // TODO: check length of addr range
        if(handle){
            LOG(TRACE)<<"Removing breakpoint with handle "<<handle<<" for addr 0x"<<std::hex<<saddr.val<<std::dec;
            target_adapter_base::bp_lut.removeEntry(handle);
            LOG(TRACE)<<"Now having "<<target_adapter_base::bp_lut.size()<<" breakpoints";
            return Ok;
        }
        LOG(TRACE)<<"Now having "<<target_adapter_base::bp_lut.size()<<" breakpoints";
        return Err;
    }

    template<typename ARCH>
    status target_adapter<ARCH>::resume_from_addr(bool step, int sig, uint64_t addr) {
        unsigned reg_no = arch::traits<ARCH>::PC;
        std::vector<uint8_t> data(8);
        *(reinterpret_cast<uint64_t*>(&data[0]))=addr;
        vm->get_arch()->set_reg(reg_no, data);
        return resume_from_current(step, sig);
    }
} // namespace CORE_DEF_NAME
} // namespace iss