From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43972) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dGRPM-0004YM-S4 for qemu-devel@nongnu.org; Thu, 01 Jun 2017 10:49:07 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dGRPL-0002WA-T4 for qemu-devel@nongnu.org; Thu, 01 Jun 2017 10:49:04 -0400 Received: from mail-wm0-x22d.google.com ([2a00:1450:400c:c09::22d]:37353) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1dGRPL-0002Vo-N1 for qemu-devel@nongnu.org; Thu, 01 Jun 2017 10:49:03 -0400 Received: by mail-wm0-x22d.google.com with SMTP id d127so63405140wmf.0 for ; Thu, 01 Jun 2017 07:49:03 -0700 (PDT) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= Date: Thu, 1 Jun 2017 15:49:15 +0100 Message-Id: <20170601144915.20778-5-alex.bennee@linaro.org> In-Reply-To: <20170601144915.20778-1-alex.bennee@linaro.org> References: <20170601144915.20778-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Qemu-devel] [PATCH v2 4/4] gdbstub: don't fail on vCont; C04:0; c packets List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: pbonzini@redhat.com, doug16k@gmail.com, imbrenda@linux.vnet.ibm.com Cc: qemu-devel@nongnu.org, =?UTF-8?q?Alex=20Benn=C3=A9e?= The thread-id of 0 means any CPU but we then ignore the fact we find the first_cpu in this case who can have an index of 0. Instead of bailing out just test if we have managed to match up thread-id to a CPU. Otherwise you get: gdb_handle_packet: command='vCont;C04:0;c' put_packet: reply='E22' The actual reason for gdb sending vCont;C04:0;c was fixed in a previous commit where we ensure the first_cpu's tid is correctly reported to gdb however we should still behave correctly next time it does send 0. Signed-off-by: Alex Bennée Reviewed-by: Greg Kurz --- v2 - used Greg's less convoluted suggestion - expand commit message --- gdbstub.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-) diff --git a/gdbstub.c b/gdbstub.c index 45a3a0b16b..6b1e72e9f7 100644 --- a/gdbstub.c +++ b/gdbstub.c @@ -937,23 +937,16 @@ static int gdb_handle_vcont(GDBState *s, const char *p) if (res) { goto out; } - idx = tmp; + /* 0 means any thread, so we pick the first valid CPU */ - if (!idx) { - idx = cpu_gdb_index(first_cpu); - } + cpu = tmp ? find_cpu(tmp) : first_cpu; - /* - * If we are in user mode, the thread specified is actually a - * thread id, and not an index. We need to find the actual - * CPU first, and only then we can use its index. - */ - cpu = find_cpu(idx); /* invalid CPU/thread specified */ - if (!idx || !cpu) { + if (!cpu) { res = -EINVAL; goto out; } + /* only use if no previous match occourred */ if (newstates[cpu->cpu_index] == 1) { newstates[cpu->cpu_index] = cur_action; -- 2.13.0