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In-Reply-To: <FCBEB468C19B4BACA765F31D9874D653@ariga>
References: <FCBEB468C19B4BACA765F31D9874D653@ariga>
Date: Tue, 15 Sep 2009 15:16:00 -0000
Message-ID: <e394668d0909150816q38b917c5r21f4d7ba9fecb212@mail.gmail.com>
Subject: Re: Does not stop at break point in GDB-remote
From: Doug Evans <dje@google.com>
To: ariga masahiro <ariga@link-lab.co.jp>
Cc: gdb@sourceware.org
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2009/9/15 ariga masahiro <ariga@link-lab.co.jp>:
> Hello,
>
> I understood a little bit of GDB remote serial protocol.
> And I newly perused =A0remote-5.log file.
>
> --- excerpts from remote-5.log : break,continue commands
> c b cyg_start =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0; break comm=
and
> c c =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0; =
continue command
> w $Z0,411dda,2#d3 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0; Insert (`Z0') =
a memory breakpoint at
> address 411dda of size 2
> r +$#00
> w +$m411dda,2#8a =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 ; Insight gets b=
reakpoint address's
> codes
> r +$1aa2#25
> w +$X411dda,2:\x01\x80#30 =A0 =A0 =A0 =A0 =A0 =A0; Write address 411dda c=
odes \x01\x80
> r +$OK#9a
> w +$vCont?#49
> r +$#00
> w +$Hc0#db
> r +$OK#9a
> w +$c#63 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0; exe=
cute continue command
> r
> +$O4E6574776F726B20737461636B207573696E6720363936333220627974657320666F72=
206D6973632073706163650A#0C
> w +
> r
> $O2020202020202020202020202020202020202020363936333220627974657320666F722=
06D627566730A#24
> w +
> r
> $O202020202020202020202020202020202020202031333932363420627974657320666F7=
2206D62756620636C7573746572730A#DF
> w +
> r
> $O5B6379675F6E65745F696E69745D20496E69743A206D62696E697428307830303030303=
03030290A#60
> w +
> r
> $O5B6379675F6E65745F696E69745D20496E69743A206379675F6E65745F696E69745F646=
576732830783030303030303030290A#32
> w +
> r $O496E697420646576696365202764703833393032615F65746830270A#FC
> w +
> r
> $O4450383339303241202D20656570726F6D204553413A2030303A30323A63623A30313A3=
4323A62390A#45
> w +
> r
> $O5B6379675F6E65745F696E69745D20496E69743A206C6F6F70617474616368283078303=
0303030303030290A#0D
> w +
> r
> $O5B6379675F6E65745F696E69745D20496E69743A206966696E697428307830303030303=
03030290A#59
> w +
> r
> $O5B6379675F6E65745F696E69745D20496E69743A20646F6D61696E696E6974283078303=
0303030303030290A#2F
> w +
> r
> $O5B6379675F6E65745F696E69745D20496E69743A206379675F6E65745F6164645F646F6=
D61696E2830783030343732386138290A#CF
> w +
> r $O4E657720646F6D61696E20696E7465726E657420617420307830303030303030300A#=
81
> w +
> r
> $O5B6379675F6E65745F696E69745D20496E69743A206379675F6E65745F6164645F646F6=
D61696E2830783030343732323938290A#CE
> w +
> r $O4E657720646F6D61696E20726F75746520617420307830303030303030300A#2E
> w +
> r
> $O5B6379675F6E65745F696E69745D20496E69743A2063616C6C5F726F7574655F696E697=
42830783030303030303030290A#5D
> w +
> r $O5B6379675F6E65745F696E69745D20446F6E650A#2D
> w +
> r +
> w \x03 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0; Here GDB stub's r=
eply terminated,and GDB
> sent "w \x03"
> r <Timeout: -1 seconds>
> End of log
> ---
>
> What is "w \x03" ?
> Because according to GDB remote serial protocol, it is reserved.
> Any meaning ?
>
> If you have any idea why GDB stub terminated reply,please teach me.

\x03 is what gdb sends to interrupt the program running on the target
when, for example, you press Ctrl-C (while the target program is
running).
Maybe the stub isn't properly recognizing and handling it?