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rework gdb packet parsing

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it should be a bit more robust now
This commit is contained in:
RSDuck
2024-09-15 07:30:53 +02:00
parent 50d32f3c96
commit a3d696121e
5 changed files with 184 additions and 247 deletions
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38
src/debug/GdbStub.cpp
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@ -23,7 +23,7 @@
#include "../Platform.h"
#include "GdbProto.h"
#include "GdbStub.h"
using namespace melonDS;
using Platform::Log;
@ -304,7 +304,7 @@ StubState GdbStub::Poll(bool wait)
if (ConnFd < 0) return StubState::NoConn;
u8 a;
if (Proto::WaitAckBlocking(ConnFd, &a, 1000) < 0)
if (WaitAckBlocking(&a, 1000) < 0)
{
Log(LogLevel::Error, "[GDB] inital handshake: didn't receive inital ack!\n");
close(ConnFd);
@ -380,7 +380,7 @@ StubState GdbStub::Poll(bool wait)
#endif
#endif
ReadResult res = Proto::MsgRecv(ConnFd, Cmdbuf);
ReadResult res = MsgRecv();
switch (res)
{
@ -422,11 +422,12 @@ ExecResult GdbStub::SubcmdExec(const u8* cmd, ssize_t len, const SubcmdHandler*
// check if prefix matches
if (!strncmp((const char*)cmd, handlers[i].SubStr, strlen(handlers[i].SubStr)))
{
if (SendAck() < 0)
// ack should have already been sent by CmdExec
/*if (SendAck() < 0)
{
Log(LogLevel::Error, "[GDB] send packet ack failed!\n");
return ExecResult::NetErr;
}
}*/
return handlers[i].Handler(this, &cmd[strlen(handlers[i].SubStr)], len-strlen(handlers[i].SubStr));
}
}
@ -444,7 +445,7 @@ ExecResult GdbStub::SubcmdExec(const u8* cmd, ssize_t len, const SubcmdHandler*
ExecResult GdbStub::CmdExec(const CmdHandler* handlers)
{
Log(LogLevel::Debug, "[GDB] command in: '%s'\n", Cmdbuf);
Log(LogLevel::Debug, "[GDB] command in: '%s'\n", &Cmdbuf[0]);
for (size_t i = 0; handlers[i].Handler != NULL; ++i)
{
@ -644,24 +645,13 @@ StubState GdbStub::CheckWatchpt(u32 addr, int kind, bool enter, bool stay)
return StubState::CheckNoHit;
}
int GdbStub::SendAck()
{
if (NoAck) return 1;
return Proto::SendAck(ConnFd);
}
int GdbStub::SendNak()
{
if (NoAck) return 1;
return Proto::SendNak(ConnFd);
}
int GdbStub::Resp(const u8* data1, size_t len1, const u8* data2, size_t len2)
{
return Proto::Resp(ConnFd, data1, len1, data2, len2, NoAck);
return Resp(data1, len1, data2, len2, NoAck);
}
int GdbStub::RespC(const char* data1, size_t len1, const u8* data2, size_t len2)
{
return Proto::Resp(ConnFd, (const u8*)data1, len1, data2, len2, NoAck);
return Resp((const u8*)data1, len1, data2, len2, NoAck);
}
#if defined(__GCC__) || defined(__clang__)
__attribute__((__format__(printf, 2/*includes implicit this*/, 3)))
@ -670,19 +660,19 @@ int GdbStub::RespFmt(const char* fmt, ...)
{
va_list args;
va_start(args, fmt);
int r = vsnprintf((char*)&Proto::RespBuf[1], sizeof(Proto::RespBuf)-5, fmt, args);
int r = vsnprintf((char*)&RespBuf[1], sizeof(RespBuf)-5, fmt, args);
va_end(args);
if (r < 0) return r;
if ((size_t)r >= sizeof(Proto::RespBuf)-5)
if ((size_t)r >= sizeof(RespBuf)-5)
{
Log(LogLevel::Error, "[GDB] truncated response in send_fmt()! (lost %zd bytes)\n",
(ssize_t)r - (ssize_t)(sizeof(Proto::RespBuf)-5));
r = sizeof(Proto::RespBuf)-5;
(ssize_t)r - (ssize_t)(sizeof(RespBuf)-5));
r = sizeof(RespBuf)-5;
}
return Resp(&Proto::RespBuf[1], r);
return Resp(&RespBuf[1], r);
}
int GdbStub::RespStr(const char* str)