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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a01:111:f403:c213::5; envelope-from=florian.hofhammer@epfl.ch; helo=ZR1P278CU001.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @epfl.ch) X-ZM-MESSAGEID: 1772705328777158500 Some registers should be marked as read-only from a plugin API perspective, as writing to them via qemu_plugin_write_register has no effect. This includes the program counter, and we expose this fact to the plugins with this patch. Reviewed-by: Alex Benn=C3=A9e Reviewed-by: Pierrick Bouvier Signed-off-by: Florian Hofhammer --- include/plugins/qemu-plugin.h | 3 +++ plugins/api.c | 16 ++++++++++++++++ 2 files changed, 19 insertions(+) diff --git a/include/plugins/qemu-plugin.h b/include/plugins/qemu-plugin.h index 7b9cd6a971..fceb8194eb 100644 --- a/include/plugins/qemu-plugin.h +++ b/include/plugins/qemu-plugin.h @@ -979,11 +979,14 @@ struct qemu_plugin_register; * writing value with qemu_plugin_write_register * @name: register name * @feature: optional feature descriptor, can be NULL + * @is_readonly: true if the register cannot be written via + * qemu_plugin_write_register */ typedef struct { struct qemu_plugin_register *handle; const char *name; const char *feature; + bool is_readonly; } qemu_plugin_reg_descriptor; =20 /** diff --git a/plugins/api.c b/plugins/api.c index 23c291f644..85b34949cb 100644 --- a/plugins/api.c +++ b/plugins/api.c @@ -410,6 +410,12 @@ bool qemu_plugin_bool_parse(const char *name, const ch= ar *value, bool *ret) * ancillary data the plugin might find useful. */ =20 +static const char pc_str[] =3D "pc"; /* generic name for program counter */ +static const char eip_str[] =3D "eip"; /* x86-specific name for PC */ +static const char rip_str[] =3D "rip"; /* x86_64-specific name for PC */ +static const char pswa_str[] =3D "pswa"; /* s390x-specific name for PC */ +static const char iaoq_str[] =3D "iaoq"; /* HP/PA-specific name for PC */ +static const char rpc_str[] =3D "rpc"; /* microblaze-specific name for PC = */ static GArray *create_register_handles(GArray *gdbstub_regs) { GArray *find_data =3D g_array_new(true, true, @@ -427,6 +433,16 @@ static GArray *create_register_handles(GArray *gdbstub= _regs) /* Create a record for the plugin */ desc.handle =3D GINT_TO_POINTER(grd->gdb_reg + 1); desc.name =3D g_intern_string(grd->name); + desc.is_readonly =3D false; + if (g_strcmp0(desc.name, pc_str) =3D=3D 0 + || g_strcmp0(desc.name, eip_str) =3D=3D 0 + || g_strcmp0(desc.name, rip_str) =3D=3D 0 + || g_strcmp0(desc.name, pswa_str) =3D=3D 0 + || g_strcmp0(desc.name, iaoq_str) =3D=3D 0 + || g_strcmp0(desc.name, rpc_str) =3D=3D 0 + ) { + desc.is_readonly =3D true; + } desc.feature =3D g_intern_string(grd->feature_name); g_array_append_val(find_data, desc); } --=20 2.53.0