[v1] plugins: Allow to read registers

[RFC PATCH 04/24] gdbstub: Introduce gdb_find_static_feature()

Akihiko Odaki posted 24 patches 2 years, 6 months ago

Diff against v2 v3 v4 v6 v7 v8 v9 v10 v11 v12 v13 v14 v15 v16 v17
Download mbox

Maintainers: Paolo Bonzini <pbonzini@redhat.com>, "Alex Bennée" <alex.bennee@linaro.org>, Thomas Huth <thuth@redhat.com>, Alexandre Iooss <erdnaxe@crans.org>, Mahmoud Mandour <ma.mandourr@gmail.com>, Eduardo Habkost <eduardo@habkost.net>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Yanan Wang <wangyanan55@huawei.com>, Richard Henderson <richard.henderson@linaro.org>, "Marc-André Lureau" <marcandre.lureau@redhat.com>, "Daniel P. Berrangé" <berrange@redhat.com>, John Snow <jsnow@redhat.com>, Cleber Rosa <crosa@redhat.com>, Peter Maydell <peter.maydell@linaro.org>, Michael Rolnik <mrolnik@gmail.com>, "Edgar E. Iglesias" <edgar.iglesias@gmail.com>, Brian Cain <bcain@quicinc.com>, Song Gao <gaosong@loongson.cn>, Xiaojuan Yang <yangxiaojuan@loongson.cn>, Laurent Vivier <laurent@vivier.eu>, Aurelien Jarno <aurelien@aurel32.net>, Jiaxun Yang <jiaxun.yang@flygoat.com>, Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>, Chris Wulff <crwulff@gmail.com>, Marek Vasut <marex@denx.de>, Stafford Horne <shorne@gmail.com>, Daniel Henrique Barboza <danielhb413@gmail.com>, "Cédric Le Goater" <clg@kaod.org>, David Gibson <david@gibson.dropbear.id.au>, Greg Kurz <groug@kaod.org>, Nicholas Piggin <npiggin@gmail.com>, Palmer Dabbelt <palmer@dabbelt.com>, Alistair Francis <alistair.francis@wdc.com>, Bin Meng <bin.meng@windriver.com>, Weiwei Li <liweiwei@iscas.ac.cn>, Liu Zhiwei <zhiwei_liu@linux.alibaba.com>, Yoshinori Sato <ysato@users.sourceforge.jp>, David Hildenbrand <david@redhat.com>, Ilya Leoshkevich <iii@linux.ibm.com>, Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>, Artyom Tarasenko <atar4qemu@gmail.com>, Bastian Koppelmann <kbastian@mail.uni-paderborn.de>, Max Filippov <jcmvbkbc@gmail.com>

There is a newer version of this series

Expand all Fold all

[RFC PATCH 04/24] gdbstub: Introduce gdb_find_static_feature()

Posted by Akihiko Odaki 2 years, 6 months ago

This function is useful to determine the number of registers exposed to
GDB from the XML name.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
 include/exec/gdbstub.h |  2 ++
 gdbstub/gdbstub.c      | 13 +++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/include/exec/gdbstub.h b/include/exec/gdbstub.h
index 22e5add5b1..3115dc21c0 100644
--- a/include/exec/gdbstub.h
+++ b/include/exec/gdbstub.h
@@ -34,6 +34,8 @@ void gdb_register_coprocessor(CPUState *cpu,
  */
 int gdbserver_start(const char *port_or_device);
 
+const GDBFeature *gdb_find_static_feature(const char *xmlname);
+
 void gdb_set_stop_cpu(CPUState *cpu);
 
 /**
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index fad70200d8..6d9cef5b95 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -414,6 +414,19 @@ static const char *get_feature_xml(const char *p, const char **newp,
     return name ? gdb_features[i].xml : NULL;
 }
 
+const GDBFeature *gdb_find_static_feature(const char *xmlname)
+{
+    const GDBFeature *feature;
+
+    for (feature = gdb_features; feature->xmlname; feature++) {
+        if (!strcmp(feature->xmlname, xmlname)) {
+            return feature;
+        }
+    }
+
+    return NULL;
+}
+
 static int gdb_read_register(CPUState *cpu, GByteArray *buf, int reg)
 {
     CPUClass *cc = CPU_GET_CLASS(cpu);
-- 
2.41.0

Re: [RFC PATCH 04/24] gdbstub: Introduce gdb_find_static_feature()

Posted by Alex Bennée 2 years, 6 months ago

Akihiko Odaki <akihiko.odaki@daynix.com> writes:

> This function is useful to determine the number of registers exposed to
> GDB from the XML name.
>
> Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
> ---
>  include/exec/gdbstub.h |  2 ++
>  gdbstub/gdbstub.c      | 13 +++++++++++++
>  2 files changed, 15 insertions(+)
>
> diff --git a/include/exec/gdbstub.h b/include/exec/gdbstub.h
> index 22e5add5b1..3115dc21c0 100644
> --- a/include/exec/gdbstub.h
> +++ b/include/exec/gdbstub.h
> @@ -34,6 +34,8 @@ void gdb_register_coprocessor(CPUState *cpu,
>   */
>  int gdbserver_start(const char *port_or_device);
>  
> +const GDBFeature *gdb_find_static_feature(const char *xmlname);
> +
>  void gdb_set_stop_cpu(CPUState *cpu);
>  
>  /**
> diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
> index fad70200d8..6d9cef5b95 100644
> --- a/gdbstub/gdbstub.c
> +++ b/gdbstub/gdbstub.c
> @@ -414,6 +414,19 @@ static const char *get_feature_xml(const char *p, const char **newp,
>      return name ? gdb_features[i].xml : NULL;
>  }
>  
> +const GDBFeature *gdb_find_static_feature(const char *xmlname)
> +{
> +    const GDBFeature *feature;
> +
> +    for (feature = gdb_features; feature->xmlname; feature++) {
> +        if (!strcmp(feature->xmlname, xmlname)) {

I'd prefer g_strcmp0(feature->xmlname, xmlname) == 0 but either way:

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

-- 
Alex Bennée
Virtualisation Tech Lead @ Linaro

Re: [RFC PATCH 04/24] gdbstub: Introduce gdb_find_static_feature()

Posted by Philippe Mathieu-Daudé 2 years, 6 months ago

On 31/7/23 10:43, Akihiko Odaki wrote:
> This function is useful to determine the number of registers exposed to
> GDB from the XML name.
> 
> Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
> ---
>   include/exec/gdbstub.h |  2 ++
>   gdbstub/gdbstub.c      | 13 +++++++++++++
>   2 files changed, 15 insertions(+)
> 
> diff --git a/include/exec/gdbstub.h b/include/exec/gdbstub.h
> index 22e5add5b1..3115dc21c0 100644
> --- a/include/exec/gdbstub.h
> +++ b/include/exec/gdbstub.h
> @@ -34,6 +34,8 @@ void gdb_register_coprocessor(CPUState *cpu,
>    */
>   int gdbserver_start(const char *port_or_device);
>   
> +const GDBFeature *gdb_find_static_feature(const char *xmlname);
> +
>   void gdb_set_stop_cpu(CPUState *cpu);
>   
>   /**
> diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
> index fad70200d8..6d9cef5b95 100644
> --- a/gdbstub/gdbstub.c
> +++ b/gdbstub/gdbstub.c
> @@ -414,6 +414,19 @@ static const char *get_feature_xml(const char *p, const char **newp,
>       return name ? gdb_features[i].xml : NULL;
>   }
>   
> +const GDBFeature *gdb_find_static_feature(const char *xmlname)
> +{
> +    const GDBFeature *feature;

Alternatively (in case you consider the suggestion to use array
of dyn_features):

const GDBFeature *gdb_find_feature(const GDBFeature *gdb_features,
                                    const char *xmlname)
{
     const GDBFeature *feature;
     const GDBFeature *features = gdb_features ?: gdb_static_features;

> +    for (feature = gdb_features; feature->xmlname; feature++) {
> +        if (!strcmp(feature->xmlname, xmlname)) {
> +            return feature;
> +        }
> +    }
> +
> +    return NULL;
> +}

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>