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Iglesias" , Brian Cain , Song Gao , Xiaojuan Yang , Laurent Vivier , Aurelien Jarno , Jiaxun Yang , Aleksandar Rikalo , Chris Wulff , Marek Vasut , Stafford Horne , Daniel Henrique Barboza , =?utf-8?q?C=C3=A9dric_Le_G?= =?utf-8?q?oater?= , David Gibson , Greg Kurz , Nicholas Piggin , Palmer Dabbelt , Alistair Francis , Bin Meng , Weiwei Li , Liu Zhiwei , Yoshinori Sato , David Hildenbrand , Ilya Leoshkevich , Mark Cave-Ayland , Artyom Tarasenko , Bastian Koppelmann , Max Filippov , qemu-devel@nongnu.org, qemu-arm@nongnu.org, qemu-ppc@nongnu.org, qemu-riscv@nongnu.org, qemu-s390x@nongnu.org, Anton Kochkov , Akihiko Odaki Subject: [PATCH v4 20/25] gdbstub: Expose functions to read registers Date: Wed, 16 Aug 2023 23:51:41 +0900 Message-ID: <20230816145155.21049-21-akihiko.odaki@daynix.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230816145155.21049-1-akihiko.odaki@daynix.com> References: <20230816145155.21049-1-akihiko.odaki@daynix.com> MIME-Version: 1.0 Received-SPF: none client-ip=2607:f8b0:4864:20::431; envelope-from=akihiko.odaki@daynix.com; helo=mail-pf1-x431.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org gdb_foreach_feature() enumerates features that are useful to identify registers. gdb_read_register() actually reads registers. Signed-off-by: Akihiko Odaki --- include/exec/gdbstub.h | 6 ++++++ gdbstub/gdbstub.c | 38 ++++++++++++++++++++++++++++++-------- 2 files changed, 36 insertions(+), 8 deletions(-) diff --git a/include/exec/gdbstub.h b/include/exec/gdbstub.h index 5cba2933d2..151e9e81c6 100644 --- a/include/exec/gdbstub.h +++ b/include/exec/gdbstub.h @@ -59,6 +59,12 @@ void gdb_feature_builder_end(const GDBFeatureBuilder *builder); const GDBFeature *gdb_find_static_feature(const char *xmlname); +void gdb_foreach_feature(CPUState *cpu, + void (* callback)(void *, const GDBFeature *, int), + void *opaque); + +int gdb_read_register(CPUState *cpu, GByteArray *buf, int reg, bool has_xml); + void gdb_set_stop_cpu(CPUState *cpu); /* in gdbstub-xml.c, generated by scripts/feature_to_c.py */ diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c index 5974af7c8f..e395a58db4 100644 --- a/gdbstub/gdbstub.c +++ b/gdbstub/gdbstub.c @@ -483,14 +483,32 @@ const GDBFeature *gdb_find_static_feature(const char *xmlname) abort(); } -static int gdb_read_register(CPUState *cpu, GByteArray *buf, int reg) +void gdb_foreach_feature(CPUState *cpu, + void (* callback)(void *, const GDBFeature *, int), + void *opaque) +{ + CPUClass *cc = CPU_GET_CLASS(cpu); + GDBRegisterState *r; + + if (!cc->gdb_core_feature) { + return; + } + + callback(opaque, cc->gdb_core_feature, 0); + + for (r = cpu->gdb_regs; r; r = r->next) { + callback(opaque, r->feature, r->base_reg); + } +} + +int gdb_read_register(CPUState *cpu, GByteArray *buf, int reg, bool has_xml) { CPUClass *cc = CPU_GET_CLASS(cpu); CPUArchState *env = cpu->env_ptr; GDBRegisterState *r; if (reg < cc->gdb_num_core_regs) { - return cc->gdb_read_register(cpu, buf, reg, gdb_has_xml); + return cc->gdb_read_register(cpu, buf, reg, has_xml); } for (r = cpu->gdb_regs; r; r = r->next) { @@ -501,14 +519,15 @@ static int gdb_read_register(CPUState *cpu, GByteArray *buf, int reg) return 0; } -static int gdb_write_register(CPUState *cpu, uint8_t *mem_buf, int reg) +static int gdb_write_register(CPUState *cpu, uint8_t *mem_buf, int reg, + bool has_xml) { CPUClass *cc = CPU_GET_CLASS(cpu); CPUArchState *env = cpu->env_ptr; GDBRegisterState *r; if (reg < cc->gdb_num_core_regs) { - return cc->gdb_write_register(cpu, mem_buf, reg, gdb_has_xml); + return cc->gdb_write_register(cpu, mem_buf, reg, has_xml); } for (r = cpu->gdb_regs; r; r = r->next) { @@ -1134,7 +1153,7 @@ static void handle_set_reg(GArray *params, void *user_ctx) reg_size = strlen(get_param(params, 1)->data) / 2; gdb_hextomem(gdbserver_state.mem_buf, get_param(params, 1)->data, reg_size); gdb_write_register(gdbserver_state.g_cpu, gdbserver_state.mem_buf->data, - get_param(params, 0)->val_ull); + get_param(params, 0)->val_ull, gdb_has_xml); gdb_put_packet("OK"); } @@ -1154,7 +1173,8 @@ static void handle_get_reg(GArray *params, void *user_ctx) reg_size = gdb_read_register(gdbserver_state.g_cpu, gdbserver_state.mem_buf, - get_param(params, 0)->val_ull); + get_param(params, 0)->val_ull, + gdb_has_xml); if (!reg_size) { gdb_put_packet("E14"); return; @@ -1241,7 +1261,8 @@ static void handle_write_all_regs(GArray *params, void *user_ctx) for (reg_id = 0; reg_id < gdbserver_state.g_cpu->gdb_num_g_regs && len > 0; reg_id++) { - reg_size = gdb_write_register(gdbserver_state.g_cpu, registers, reg_id); + reg_size = gdb_write_register(gdbserver_state.g_cpu, registers, reg_id, + gdb_has_xml); len -= reg_size; registers += reg_size; } @@ -1259,7 +1280,8 @@ static void handle_read_all_regs(GArray *params, void *user_ctx) for (reg_id = 0; reg_id < gdbserver_state.g_cpu->gdb_num_g_regs; reg_id++) { len += gdb_read_register(gdbserver_state.g_cpu, gdbserver_state.mem_buf, - reg_id); + reg_id, + gdb_has_xml); } g_assert(len == gdbserver_state.mem_buf->len);