Re: gdb 8.3.1 truncated register in remote g packet

Reinoud Koornstra
2019-11-01T20:55:12Z

[SNIP]

> This is not great.
>
> If the debugging stub doesn't support qSupported, then it means GDB will
> need to guess what the stub's register set is, and that can be tricky.
>
> Do you know what register set the debugging stub is using?
>
> I need to do some reading if I can see more about the register set and see
if I can see the whole transmission over serial to verify whether the
packet is truncated or not.
let me try to find out and get back to you.
Thanks, Reinoud.

> > Sending packet: $vMustReplyEmpty#3a...Ack
> > Packet received:
> > Sending packet: $Hg0#df...Ack
> > Packet received: OK
> > Sending packet: $qTStatus#49...Ack
> > Packet received:
> > Packet qTStatus (trace-status) is NOT supported
> > Sending packet: $?#3f...Ack
> > Packet received: S05
> > Sending packet: $qfThreadInfo#bb...Ack
> > Packet received:
> > mfffffffe,fffffffd,01,02,03,05,06,07,08,09,0a,0b,0c,0d,0e,0f,10,11,12
> > Sending packet: $qsThreadInfo#c8...Ack
> > Packet received:
> >
> m0147,014a,014c,0164,016f,0198,01a3,01a9,01dc,01ea,04b3,0502,0511,0512,0513,0514,0515
> > Sending packet: $qsThreadInfo#c8...Ack
> > Packet received:
> >
> m0523,0524,0525,0535,0540,0548,0614,098d,0992,0993,09bf,09c2,09c8,09cd,09ce,09db,09e1
> > Sending packet: $qsThreadInfo#c8...Ack
> > Packet received:
> >
> m09ea,09f7,09ff,0a36,0a3e,0a4b,0a51,0a57,0a58,0a5a,0a5b,0a5d,0a5e,0a5f,0aa4,0aa6,0aa8
> > Sending packet: $qsThreadInfo#c8...Ack
> > Packet received:
> >
> m0af2,0af3,0af4,0afa,0afc,0b7d,0b9a,0b9b,0b9c,0c1d,0cb8,0b96,0be9,0beb,0bf7,0bfb,0bfc
> > Sending packet: $qsThreadInfo#c8...Ack
> > Packet received:
> >
> m0bfd,0bfe,0bff,0c00,0c01,0c02,0c03,0c04,0c05,0c06,0c60,0c65,0c67,0c68,0c6d,0c6e,0c7c
> > Sending packet: $qsThreadInfo#c8...Ack
> > Packet received:
> >
> m0c7d,0c7f,0ce5,0df6,0e2f,0e39,0e3b,0e3d,0e5d,0e3e,0e3f,0e41,0e8c,0e8e,0ea3,0eaf,0ebc
> > Sending packet: $qsThreadInfo#c8...Ack
> > Packet received:
> >
> m0ebe,0ebf,0ec1,0ec2,0ec5,0ec7,0ec9,0ed0,0ed3,0ed4,0eca,0ecc,0ece,0ecf,0ed2,0edc,1061
> > Sending packet: $qsThreadInfo#c8...Ack
> > Packet received:
> >
> m1105,13fb,144c,145a,14b6,14c8,14cd,14e0,14f4,150b,1510,1511,1512,1514,1699,169b,169d
> > Sending packet: $qsThreadInfo#c8...Ack
> > Packet received:
> >
> m169e,169f,16a0,16a1,16a2,16cd,16cf,16d1,16d2,16d3,16d7,16dd,16de,16df,16e0,16e1,16e2
> > Sending packet: $qsThreadInfo#c8...Ack
> > Packet received:
> >
> m16e3,16e4,16e6,1961,1c81,1c82,1c83,1c84,1c85,1c86,1c87,16f2,16f3,16f5,16f6,16fc,1758
> > Sending packet: $qsThreadInfo#c8...Ack
> > Packet received:
> >
> m1759,175a,16f7,16f8,16fa,1704,1706,1719,1723,1724,1725,1734,1735,1741,1744,1747,1877
> > Sending packet: $qsThreadInfo#c8...Ack
> > Packet received:
> >
> m187b,187d,1880,188f,1893,193b,1949,194a,194f,1952,1957,1a78,1c75,1c77,1c9d,1eb4,1eb6
> > Sending packet: $qsThreadInfo#c8...Ack
> > Packet received:
> > m1eb8,1ebe,29ed,0149,096c,1334,184d,1df6,1f3f,2123,2165,2175,2183
> > Sending packet: $qsThreadInfo#c8...Ack
> > Packet received:
> > Sending packet: $qAttached#8f...Ack
> > Packet received:
> > Packet qAttached (query-attached) is NOT supported
> > Sending packet: $Hc-1#09...Ack
> > Packet received: OK
> > Sending packet: $qC#b4...Ack
> > Packet received: QC0aa8
> > Sending packet: $qOffsets#4b...Ack
> > Packet received:
> > Sending packet: $g#67...Ack
> > Packet received:
> >
> 0000000001000000b0829e80ac829e8054829880b4a698806700000013000060060000000000000000000000cc3e27bed03e27bec03e27be10200a80581f0a8000000000000000000000000000000000000000000000000000000000000000000000000000000000
> > Truncated register 19 in remote 'g' packet
>
> Could you verify if there is real truncation in the data transmission?
> Do you have access to what the debugging stub is sending?
>