Hi, >From testing with a max vector length, the minimum size the buffer needs to be is 131077 to survive the worst case of a P packet with the ZA register. This is enough to fit the whole ZA register plus the overhead for the P packet (command + register number, the checksum is not stored in line_buf) and the null terminator. I had overshot and rounded it safely to 131100, and it seems gdbserver has done the same thing but they specifically counted 32 bytes for overhead, it's not specified why. So the 131100 is large enough, however I have changed it to 131104 just to stay consistent with gdbserver and have added this note to the comment you've suggested to be placed above MAX_PACKET_LENGTH. I've also changed line_buf to be a GString as Alex suggested.
I have sent a new version with these changes. Looking forward to your feedback! Thanks, Vacha
