[patch] Suggest fixing your target for gdbserver(1)
Jan Kratochvil
jan.kratochvil@redhat.com
Tue Sep 26 15:27:00 GMT 2006
Hi,
x86_64 defaults (by bfd matching) to target "i386" instead of its native
"i386:x86_64". Therefore if you connect to gdbserver(1) without any `file' or
`set architecture' command before the communication will crash on a different
expected register sizes.
As implementing architecture negotiation is complicated due to gdbserver(1) not
being aware of bfd-compatible name of its target and also it may be also
unclear to automatically change the target while working remotely it is just
suggesting to double-check which architecture you are using.
(gdb) target remote localhost:1234
Remote debugging using localhost:1234
Remote debugging from host 127.0.0.1
Remote register badly formatted: T0506:0000000000000000;07:40daffbf7f000000;10:506b55952a000000;
readchar: Got EOF
here: 0000000;07:40daffbf7f000000;10:506b55952a000000;
Try to load the executable by `file' first,
you may also check `set/show architecture'.
(gdb) Remote side has terminated connection. GDBserver will reopen the connection.
Listening on port 1234
Regards,
Jan
-------------- next part --------------
2006-09-26 Jan Kratochvil <jan.kratochvil@redhat.com>
* remote.c (remote_wait): Suggestion on crash due to nonmatching target.
(remote_async_wait): Likewise.
Index: gdb/remote.c
===================================================================
RCS file: /cvs/src/src/gdb/remote.c,v
retrieving revision 1.230
diff -u -p -r1.230 remote.c
--- gdb/remote.c 22 Sep 2006 13:50:36 -0000 1.230
+++ gdb/remote.c 26 Sep 2006 15:15:32 -0000
@@ -3103,8 +3103,13 @@ Packet: '%s'\n"),
reg->regnum, regs);
}
+ /* It may also occur on amd64 which defaults to 32-bit i386
+ target. gdbserver(1) is not aware of the `set architecture'
+ name itself as it is not using libbfd. */
if (*p++ != ';')
- error (_("Remote register badly formatted: %s\nhere: %s"),
+ error (_("Remote register badly formatted: %s\nhere: %s"
+ "\nTry to load the executable by `file' first,"
+ "\nyou may also check `set/show architecture'."),
buf, p);
}
}
@@ -3299,8 +3304,13 @@ Packet: '%s'\n"),
regcache_raw_supply (current_regcache, reg->regnum, regs);
}
+ /* It may also occur on amd64 which defaults to 32-bit i386
+ target. gdbserver(1) is not aware of the `set architecture'
+ name itself as it is not using libbfd. */
if (*p++ != ';')
- error (_("Remote register badly formatted: %s\nhere: %s"),
+ error (_("Remote register badly formatted: %s\nhere: %s"
+ "\nTry to load the executable by `file' first,"
+ "\nyou may also check `set/show architecture'."),
buf, p);
}
}
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