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Properly read and write registers

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momo5502
2025-01-19 10:18:45 +01:00
parent 192d5687ff
commit 77b4ee5e1e
7 changed files with 43 additions and 47 deletions
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34
src/gdb-stub/gdb_stub.cpp
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@@ -209,16 +209,16 @@ namespace gdb_stub
for (size_t i = 0; i < registers; ++i)
{
memset(data.data(), 0, data.size());
const auto res = handler.read_register(i, data.data(), data.size());
const auto size = handler.read_register(i, data.data(), data.size());
if (!res)
if (!size)
{
connection.send_reply("E01");
return;
}
response.append(utils::string::to_hex_string(data));
const std::span register_data(data.data(), size);
response.append(utils::string::to_hex_string(register_data));
}
connection.send_reply(response);
@@ -231,20 +231,21 @@ namespace gdb_stub
const auto registers = handler.get_register_count();
const auto register_size = handler.get_max_register_size();
size_t offset = 0;
for (size_t i = 0; i < registers; ++i)
{
const auto offset = i * register_size;
const auto end_offset = offset + register_size;
if (data.size() < end_offset)
if (offset >= data.size())
{
connection.send_reply("E01");
return;
}
const auto res = handler.write_register(i, data.data() + offset, register_size);
const auto max_size = std::min(register_size, data.size() - offset);
const auto size = handler.write_register(i, data.data() + offset, max_size);
if (!res)
offset += size;
if (!size)
{
connection.send_reply("E01");
return;
@@ -263,11 +264,12 @@ namespace gdb_stub
std::vector<std::byte> data{};
data.resize(handler.get_max_register_size());
const auto res = handler.read_register(reg, data.data(), data.size());
const auto size = handler.read_register(reg, data.data(), data.size());
if (res)
if (size)
{
connection.send_reply(utils::string::to_hex_string(data));
const std::span register_data(data.data(), size);
connection.send_reply(utils::string::to_hex_string(register_data));
}
else
{
@@ -283,12 +285,8 @@ namespace gdb_stub
size_t register_index{};
rt_assert(sscanf_s(std::string(reg).c_str(), "%zx", &register_index) == 1);
const auto register_size = handler.get_max_register_size();
const auto data = utils::string::from_hex_string(hex_data);
const auto res = register_size <= data.size() && //
handler.write_register(register_index, data.data(), register_size);
const auto res = handler.write_register(register_index, data.data(), data.size()) > 0;
connection.send_reply(res ? "OK" : "E01");
}