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Re: [Qemu-devel] [PATCH v1 2/2] gdbstub: don't fail on vCont; C04:0; c p
From: |
Claudio Imbrenda |
Subject: |
Re: [Qemu-devel] [PATCH v1 2/2] gdbstub: don't fail on vCont; C04:0; c packets |
Date: |
Wed, 31 May 2017 18:17:37 +0200 |
On Wed, 31 May 2017 16:09:33 +0100
Alex Bennée <address@hidden> wrote:
> 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'
>
> Signed-off-by: Alex Bennée <address@hidden>
> ---
> gdbstub.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/gdbstub.c b/gdbstub.c
> index a249846954..29c9ed3002 100644
> --- a/gdbstub.c
> +++ b/gdbstub.c
> @@ -934,8 +934,8 @@ static int gdb_handle_vcont(GDBState *s, const
> char *p)
> * CPU first, and only then we can use its index.
> */
> cpu = find_cpu(idx);
> - /* invalid CPU/thread specified */
> - if (!idx || !cpu) {
> + /* invalid thread specified, cpu not found. */
> + if (!cpu) {
> res = -EINVAL;
> goto out;
> }
This is strange. cpu_index() is defined as:
static inline int cpu_index(CPUState *cpu)
{
#if defined(CONFIG_USER_ONLY)
return cpu->host_tid;
#else
return cpu->cpu_index + 1;
#endif
}
therefore it shouldn't return 0 under any circumstance, and
find_cpu(idx) should also fail if idx == 0, because internally it also
uses cpu_index()
on the other hand, you say that the patch does fix the problem for you,
which really confuses me.
(probably) completely unrelatedly, this:
res = qemu_strtoul(p + 1, &p, 16, &tmp);
should be like this instead:
res = qemu_strtoul(p, &p, 16, &tmp);
but this shouldn't impact you in any way.
- [Qemu-devel] [PATCH v1 0/2] some gdbstub fixes for debug and vcont, Alex Bennée, 2017/05/31
- [Qemu-devel] [PATCH v1 2/2] gdbstub: don't fail on vCont; C04:0; c packets, Alex Bennée, 2017/05/31
- Re: [Qemu-devel] [PATCH v1 2/2] gdbstub: don't fail on vCont; C04:0; c packets, Greg Kurz, 2017/05/31
- Re: [Qemu-devel] [PATCH v1 2/2] gdbstub: don't fail on vCont; C04:0; c packets,
Claudio Imbrenda <=
- Re: [Qemu-devel] [PATCH v1 2/2] gdbstub: don't fail on vCont; C04:0; c packets, Alex Bennée, 2017/05/31
- Re: [Qemu-devel] [PATCH v1 2/2] gdbstub: don't fail on vCont; C04:0; c packets, Greg Kurz, 2017/05/31
- Re: [Qemu-devel] [PATCH v1 2/2] gdbstub: don't fail on vCont; C04:0; c packets, Claudio Imbrenda, 2017/05/31
- Re: [Qemu-devel] [PATCH v1 2/2] gdbstub: don't fail on vCont; C04:0; c packets, Greg Kurz, 2017/05/31
- Re: [Qemu-devel] [PATCH v1 2/2] gdbstub: don't fail on vCont; C04:0; c packets, Claudio Imbrenda, 2017/05/31
- Re: [Qemu-devel] [PATCH v1 2/2] gdbstub: don't fail on vCont; C04:0; c packets, Alex Bennée, 2017/05/31
- Re: [Qemu-devel] [PATCH v1 2/2] gdbstub: don't fail on vCont; C04:0; c packets, Greg Kurz, 2017/05/31
- Re: [Qemu-devel] [PATCH v1 2/2] gdbstub: don't fail on vCont; C04:0; c packets, Alex Bennée, 2017/05/31
[Qemu-devel] [PATCH v1 1/2] gdbstub: modernise DEBUG_GDB, Alex Bennée, 2017/05/31