55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
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#pragma once
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#include <cstdint>
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#include <optional>
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#include "src/DebugServers/GdbRsp/CommandPackets/CommandPacket.hpp"
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#include "src/Targets/TargetMemory.hpp"
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namespace Bloom::DebugServers::Gdb::AvrGdb::CommandPackets
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{
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/**
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* The ReadMemory class implements a structure for "m" packets. Upon receiving these packets, the server is
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* expected to read memory from the target and send it the client.
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*/
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class AbstractMemoryAccessPacket: public Bloom::DebugServers::Gdb::CommandPackets::CommandPacket
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{
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public:
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explicit AbstractMemoryAccessPacket(const std::vector<unsigned char>& rawPacket): CommandPacket(rawPacket) {};
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protected:
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/**
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* The mask used by the AVR GDB client to encode the memory type into memory addresses.
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*/
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static constexpr std::uint32_t AVR_GDB_MEMORY_ADDRESS_MASK = 0xFE0000U;
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/**
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* avr-gdb uses the most significant 15 bits in memory addresses to indicate the type of memory being
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* addressed.
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*
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* @param address
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* @return
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*/
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Targets::TargetMemoryType getMemoryTypeFromGdbAddress(std::uint32_t address) {
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if ((address & AbstractMemoryAccessPacket::AVR_GDB_MEMORY_ADDRESS_MASK) != 0U) {
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return Targets::TargetMemoryType::RAM;
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}
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return Targets::TargetMemoryType::FLASH;
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}
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/**
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* Strips the most significant 15 bits from a GDB memory address.
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*
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* @param address
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* @return
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*/
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std::uint32_t removeMemoryTypeIndicatorFromGdbAddress(std::uint32_t address) {
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return (address & AbstractMemoryAccessPacket::AVR_GDB_MEMORY_ADDRESS_MASK) != 0U
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? (address & ~(AbstractMemoryAccessPacket::AVR_GDB_MEMORY_ADDRESS_MASK))
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: address;
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}
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};
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}
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