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GDBServer: Implement memory breakpoints

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Stenzek 2025-03-11 21:50:26 +10:00
parent a0c06f8d9c
commit 7bae23d79d
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1 changed files with 63 additions and 29 deletions
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92
src/core/gdb_server.cpp
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@ -53,8 +53,8 @@ static bool Cmd$G(ClientSocket* client, std::string_view data);
static bool Cmd$m(ClientSocket* client, std::string_view data);
static bool Cmd$M(ClientSocket* client, std::string_view data);
static bool Cmd$s(ClientSocket* client, std::string_view data);
static bool Cmd$z1(ClientSocket* client, std::string_view data);
static bool Cmd$Z1(ClientSocket* client, std::string_view data);
template<bool add_breakpoint>
static bool Cmd$z(ClientSocket* client, std::string_view data);
static bool Cmd$vMustReplyEmpty(ClientSocket* client, std::string_view data);
static bool Cmd$qSupported(ClientSocket* client, std::string_view data);
@ -122,10 +122,8 @@ static constexpr std::pair<std::string_view, bool (*)(ClientSocket*, std::string
{"m", Cmd$m},
{"M", Cmd$M},
{"s", Cmd$s},
{"z0,", Cmd$z1},
{"Z0,", Cmd$Z1},
{"z1,", Cmd$z1},
{"Z1,", Cmd$Z1},
{"z", Cmd$z<false>},
{"Z", Cmd$z<true>},
{"vMustReplyEmpty", Cmd$vMustReplyEmpty},
{"qSupported", Cmd$qSupported},
};
@ -286,40 +284,76 @@ bool GDBServer::Cmd$s(ClientSocket* client, std::string_view data)
return true;
}
/// Remove hardware breakpoint.
bool GDBServer::Cmd$z1(ClientSocket* client, std::string_view data)
/// Remove hardware breakpoint (z).
/// Insert hardware breakpoint (Z).
template<bool add_breakpoint>
bool GDBServer::Cmd$z(ClientSocket* client, std::string_view data)
{
const std::optional<VirtualMemoryAddress> address = StringUtil::FromChars<VirtualMemoryAddress>(data, 16);
if (address.has_value())
std::string_view caret = data;
std::optional<u32> bptype;
std::optional<VirtualMemoryAddress> bpaddr;
// type,addr
if (!(bptype = StringUtil::FromChars<u32>(caret, 10, &caret)) || caret.empty() || caret[0] != ',' ||
!(bpaddr = StringUtil::FromChars<VirtualMemoryAddress>(caret.substr(1), 16)).has_value())
{
CPU::RemoveBreakpoint(CPU::BreakpointType::Execute, *address);
ERROR_LOG("Invalid {} hw breakpoint packet: {}", add_breakpoint ? "add" : "remove", data);
return false;
}
if (bptype.value() == 0 || bptype.value() == 1) // software/hardware breakpoint
{
if constexpr (add_breakpoint)
CPU::AddBreakpoint(CPU::BreakpointType::Execute, bpaddr.value());
else
CPU::RemoveBreakpoint(CPU::BreakpointType::Execute, bpaddr.value());
client->SendReplyWithAck("OK");
return true;
}
else if (bptype.value() == 2) // write breakpoint
{
if constexpr (add_breakpoint)
CPU::AddBreakpoint(CPU::BreakpointType::Write, bpaddr.value());
else
CPU::RemoveBreakpoint(CPU::BreakpointType::Write, bpaddr.value());
client->SendReplyWithAck("OK");
return true;
}
else if (bptype.value() == 3) // read breakpoint
{
if constexpr (add_breakpoint)
CPU::AddBreakpoint(CPU::BreakpointType::Read, bpaddr.value());
else
CPU::RemoveBreakpoint(CPU::BreakpointType::Read, bpaddr.value());
client->SendReplyWithAck("OK");
return true;
}
else if (bptype.value() == 4) // read+write breakpoint
{
if constexpr (add_breakpoint)
{
CPU::AddBreakpoint(CPU::BreakpointType::Read, bpaddr.value());
CPU::AddBreakpoint(CPU::BreakpointType::Write, bpaddr.value());
}
else
{
CPU::RemoveBreakpoint(CPU::BreakpointType::Read, bpaddr.value());
CPU::RemoveBreakpoint(CPU::BreakpointType::Write, bpaddr.value());
}
client->SendReplyWithAck("OK");
return true;
}
else
{
ERROR_LOG("Invalid address to remove hw breakpoint: ", data);
client->SendReplyWithAck();
ERROR_LOG("Unknown breakpoint type {}", bptype.value());
return false;
}
}
/// Insert hardware breakpoint.
bool GDBServer::Cmd$Z1(ClientSocket* client, std::string_view data)
{
const std::optional<VirtualMemoryAddress> address = StringUtil::FromChars<VirtualMemoryAddress>(data, 16);
if (address)
{
CPU::AddBreakpoint(CPU::BreakpointType::Execute, *address, false);
client->SendReplyWithAck("OK");
return true;
}
else
{
ERROR_LOG("Invalid address to insert hw breakpoint: ", data);
return false;
}
}
template bool GDBServer::Cmd$z<false>(ClientSocket* client, std::string_view data);
template bool GDBServer::Cmd$z<true>(ClientSocket* client, std::string_view data);
bool GDBServer::Cmd$vMustReplyEmpty(ClientSocket* client, std::string_view data)
{