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frv: extend gdbstub to support more features of gdb

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Extend gdbstub to support more features of gdb remote protocol to keep
gdb-7 and emacs gud mode happy:

 (*) The D command.  Detach debugger.

 (*) The H command.  Handle setting the target thread by ignoring it.

 (*) The qAttached command.  Indicate we 'attached' to an existing process.

 (*) The qC command.  Indicate that the current thread ID is 0.

 (*) The qOffsets command.  Indicate that no relocation has been done.

 (*) The qSymbol:: command.  Indicate that we're not interested in looking up
     any symbol addresses.

 (*) The qSupported command.  Indicate the maximum packet size and the fact
     that reverse step and continue aren't supported.

 (*) The vCont? command.  Indicate that we don't support any of its variants.

Also make it possible to trace the commands and replies without tracing
the individual character I/O.

[akpm@linux-foundation.org: make gdbstub_handle_query() static]
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells
2010-05-24 14:32:54 -07:00
committed by Linus Torvalds
parent c6f6b596a5
commit 7ca8b9c0da
3 changed files with 70 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
arch/frv/kernel/gdb-io.c
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@@ -171,11 +171,11 @@ int gdbstub_rx_char(unsigned char *_ch, int nonblock)
return -EINTR;
}
else if (st & (UART_LSR_FE|UART_LSR_OE|UART_LSR_PE)) {
gdbstub_proto("### GDB Rx Error (st=%02x) ###\n",st);
gdbstub_io("### GDB Rx Error (st=%02x) ###\n",st);
return -EIO;
}
else {
gdbstub_proto("### GDB Rx %02x (st=%02x) ###\n",ch,st);
gdbstub_io("### GDB Rx %02x (st=%02x) ###\n",ch,st);
*_ch = ch & 0x7f;
return 0;
}