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author | David Howells <dhowells@redhat.com> | 2010-05-24 14:32:54 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-25 08:07:02 -0700 |
commit | 7ca8b9c0dafd1cb36289aa4c92c7beae7adcd34f (patch) | |
tree | a762d0b8bbb090b423eafae7f009839592e23290 /arch/frv/kernel | |
parent | c6f6b596a5a73e63e5e930c414375c0c389199ab (diff) | |
download | linux-7ca8b9c0dafd1cb36289aa4c92c7beae7adcd34f.tar.gz linux-7ca8b9c0dafd1cb36289aa4c92c7beae7adcd34f.tar.bz2 linux-7ca8b9c0dafd1cb36289aa4c92c7beae7adcd34f.zip |
frv: extend gdbstub to support more features of gdb
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>
Diffstat (limited to 'arch/frv/kernel')
-rw-r--r-- | arch/frv/kernel/gdb-io.c | 4 | ||||
-rw-r--r-- | arch/frv/kernel/gdb-stub.c | 61 |
2 files changed, 63 insertions, 2 deletions
diff --git a/arch/frv/kernel/gdb-io.c b/arch/frv/kernel/gdb-io.c index c997bccb9221..2ca641d199f8 100644 --- a/arch/frv/kernel/gdb-io.c +++ b/arch/frv/kernel/gdb-io.c @@ -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; } diff --git a/arch/frv/kernel/gdb-stub.c b/arch/frv/kernel/gdb-stub.c index 7ca8a6b19ac9..84d103c33c9c 100644 --- a/arch/frv/kernel/gdb-stub.c +++ b/arch/frv/kernel/gdb-stub.c @@ -1344,6 +1344,44 @@ void gdbstub_get_mmu_state(void) } /* end gdbstub_get_mmu_state() */ +/* + * handle general query commands of the form 'qXXXXX' + */ +static void gdbstub_handle_query(void) +{ + if (strcmp(input_buffer, "qAttached") == 0) { + /* return current thread ID */ + sprintf(output_buffer, "1"); + return; + } + + if (strcmp(input_buffer, "qC") == 0) { + /* return current thread ID */ + sprintf(output_buffer, "QC 0"); + return; + } + + if (strcmp(input_buffer, "qOffsets") == 0) { + /* return relocation offset of text and data segments */ + sprintf(output_buffer, "Text=0;Data=0;Bss=0"); + return; + } + + if (strcmp(input_buffer, "qSymbol::") == 0) { + sprintf(output_buffer, "OK"); + return; + } + + if (strcmp(input_buffer, "qSupported") == 0) { + /* query of supported features */ + sprintf(output_buffer, "PacketSize=%u;ReverseContinue-;ReverseStep-", + sizeof(input_buffer)); + return; + } + + gdbstub_strcpy(output_buffer,"E01"); +} + /*****************************************************************************/ /* * handle event interception and GDB remote protocol processing @@ -1840,6 +1878,10 @@ void gdbstub(int sigval) case 'k' : goto done; /* just continue */ + /* detach */ + case 'D': + gdbstub_strcpy(output_buffer, "OK"); + break; /* reset the whole machine (FIXME: system dependent) */ case 'r': @@ -1852,6 +1894,14 @@ void gdbstub(int sigval) __debug_status.dcr |= DCR_SE; goto done; + /* extended command */ + case 'v': + if (strcmp(input_buffer, "vCont?") == 0) { + output_buffer[0] = 0; + break; + } + goto unsupported_cmd; + /* set baud rate (bBB) */ case 'b': ptr = &input_buffer[1]; @@ -1923,8 +1973,19 @@ void gdbstub(int sigval) gdbstub_strcpy(output_buffer,"OK"); break; + /* Thread-setting packet */ + case 'H': + gdbstub_strcpy(output_buffer, "OK"); + break; + + case 'q': + gdbstub_handle_query(); + break; + default: + unsupported_cmd: gdbstub_proto("### GDB Unsupported Cmd '%s'\n",input_buffer); + gdbstub_strcpy(output_buffer,"E01"); break; } |