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Processed in 6e-06 secs); 07 Dec 2023 21:04:35 -0000 From: Nicolas Eder To: qemu-devel@nongnu.org Cc: "Nicolas Eder" , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , "Christian Boenig" , =?UTF-8?q?Alex=20Benn=C3=A9e?= Subject: [PATCH v4 17/17] mcdstub: break/watchpoints added Date: Thu, 7 Dec 2023 22:03:58 +0100 Message-Id: <20231207210358.7409-18-nicolas.eder@lauterbach.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231207210358.7409-1-nicolas.eder@lauterbach.com> References: <20231207210358.7409-1-nicolas.eder@lauterbach.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Qmail-Scanner-2.11: added fake Content-Type header Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=62.154.241.196; envelope-from=nicolas.eder@lauterbach.com; helo=smtp1.lauterbach.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, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: 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-ZM-MESSAGEID: 1701983148810100005 Content-Type: text/plain; charset="utf-8" --- debug/mcdstub/mcdstub.c | 154 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 154 insertions(+) diff --git a/debug/mcdstub/mcdstub.c b/debug/mcdstub/mcdstub.c index e5fd575834..dadd79034b 100644 --- a/debug/mcdstub/mcdstub.c +++ b/debug/mcdstub/mcdstub.c @@ -1177,6 +1177,134 @@ static void handle_write_memory(GArray *params, voi= d *user_ctx) mcd_put_packet(TCP_EXECUTION_SUCCESS); } =20 +/** + * mcd_breakpoint_insert() - Inserts a break- or watchpoint. + * + * This function evaluates the received breakpoint type and translates it + * to a known GDB breakpoint type. + * Then it calls cpu_breakpoint_insert or cpu_watchpoint_insert depending = on + * the type. + * @cpu: CPU to which the breakpoint should be added. + * @addr: Address of the breakpoint. + * @type: Breakpoint type. + */ +static int mcd_breakpoint_insert(CPUState *cpu, int type, vaddr addr) +{ + /* translate the type to known gdb types and function call*/ + int bp_type =3D 0; + CPUClass *cc =3D CPU_GET_CLASS(cpu); + if (cc->gdb_stop_before_watchpoint) { + /* bp_type |=3D BP_STOP_BEFORE_ACCESS; */ + } + int return_value =3D 0; + switch (type) { + case MCD_BREAKPOINT_HW: + return_value =3D cpu_breakpoint_insert(cpu, addr, BP_GDB, NULL); + return return_value; + case MCD_BREAKPOINT_READ: + bp_type |=3D BP_GDB | BP_MEM_READ; + return_value =3D cpu_watchpoint_insert(cpu, addr, 4, bp_type, NULL= ); + return return_value; + case MCD_BREAKPOINT_WRITE: + bp_type |=3D BP_GDB | BP_MEM_WRITE; + return_value =3D cpu_watchpoint_insert(cpu, addr, 4, bp_type, NULL= ); + return return_value; + case MCD_BREAKPOINT_RW: + bp_type |=3D BP_GDB | BP_MEM_ACCESS; + return_value =3D cpu_watchpoint_insert(cpu, addr, 4, bp_type, NULL= ); + return return_value; + default: + return -ENOSYS; + } +} + +/** + * mcd_breakpoint_remove() - Removes a break- or watchpoint. + * + * This function evaluates the received breakpoint type and translates it + * to a known GDB breakpoint type. + * Then it calls cpu_breakpoint_remove or cpu_watchpoint_remove depending = on + * the type. + * @cpu: CPU from which the breakpoint should be removed. + * @addr: Address of the breakpoint. + * @type: Breakpoint type. + */ +static int mcd_breakpoint_remove(CPUState *cpu, int type, vaddr addr) +{ + /* translate the type to known gdb types and function call*/ + int bp_type =3D 0; + CPUClass *cc =3D CPU_GET_CLASS(cpu); + if (cc->gdb_stop_before_watchpoint) { + /* bp_type |=3D BP_STOP_BEFORE_ACCESS; */ + } + int return_value =3D 0; + switch (type) { + case MCD_BREAKPOINT_HW: + return_value =3D cpu_breakpoint_remove(cpu, addr, BP_GDB); + return return_value; + case MCD_BREAKPOINT_READ: + bp_type |=3D BP_GDB | BP_MEM_READ; + return_value =3D cpu_watchpoint_remove(cpu, addr, 4, bp_type); + return return_value; + case MCD_BREAKPOINT_WRITE: + bp_type |=3D BP_GDB | BP_MEM_WRITE; + return_value =3D cpu_watchpoint_remove(cpu, addr, 4, bp_type); + return return_value; + case MCD_BREAKPOINT_RW: + bp_type |=3D BP_GDB | BP_MEM_ACCESS; + return_value =3D cpu_watchpoint_remove(cpu, addr, 4, bp_type); + return return_value; + default: + return -ENOSYS; + } +} + +/** + * handle_breakpoint_insert() - Handler for inserting a break- or watchpoi= nt. + * + * This function extracts the CPU, breakpoint type and address from the + * parameters and calls :c:func:`mcd_breakpoint_insert` to insert the + * breakpoint. + * @params: GArray with all TCP packet parameters. + */ +static void handle_breakpoint_insert(GArray *params, void *user_ctx) +{ + /* 1. get parameter data */ + uint32_t cpu_id =3D get_param(params, 0)->cpu_id; + uint32_t type =3D get_param(params, 1)->data_uint32_t; + uint64_t address =3D get_param(params, 2)->data_uint64_t; + /* 2. insert breakpoint and send reply */ + CPUState *cpu =3D mcd_get_cpu(cpu_id); + if (mcd_breakpoint_insert(cpu, type, address) !=3D 0) { + mcd_put_packet(TCP_EXECUTION_ERROR); + } else { + mcd_put_packet(TCP_EXECUTION_SUCCESS); + } +} + +/** + * handle_breakpoint_remove() - Handler for inserting a break- or watchpoi= nt. + * + * This function extracts the CPU, breakpoint type and address from the + * parameters and calls :c:func:`mcd_breakpoint_remove` to insert the + * breakpoint. + * @params: GArray with all TCP packet parameters. + */ +static void handle_breakpoint_remove(GArray *params, void *user_ctx) +{ + /* 1. get parameter data */ + uint32_t cpu_id =3D get_param(params, 0)->cpu_id; + uint32_t type =3D get_param(params, 1)->data_uint32_t; + uint64_t address =3D get_param(params, 2)->data_uint64_t; + /* 2. remove breakpoint and send reply */ + CPUState *cpu =3D mcd_get_cpu(cpu_id); + if (mcd_breakpoint_remove(cpu, type, address) !=3D 0) { + mcd_put_packet(TCP_EXECUTION_ERROR); + } else { + mcd_put_packet(TCP_EXECUTION_SUCCESS); + } +} + /** * mcd_handle_packet() - Evaluates the type of received packet and chooses= the * correct handler. @@ -1342,6 +1470,32 @@ static int mcd_handle_packet(const char *line_buf) cmd_parser =3D &write_mem_cmd_desc; } break; + case TCP_CHAR_BREAKPOINT_INSERT: + { + static MCDCmdParseEntry handle_breakpoint_insert_cmd_desc =3D { + .handler =3D handle_breakpoint_insert, + }; + handle_breakpoint_insert_cmd_desc.cmd =3D + (char[2]) { TCP_CHAR_BREAKPOINT_INSERT, '\0' }; + strcpy(handle_breakpoint_insert_cmd_desc.schema, + (char[4]) { ARG_SCHEMA_CORENUM, ARG_SCHEMA_INT, + ARG_SCHEMA_UINT64_T, '\0' }); + cmd_parser =3D &handle_breakpoint_insert_cmd_desc; + } + break; + case TCP_CHAR_BREAKPOINT_REMOVE: + { + static MCDCmdParseEntry handle_breakpoint_remove_cmd_desc =3D { + .handler =3D handle_breakpoint_remove, + }; + handle_breakpoint_remove_cmd_desc.cmd =3D + (char[2]) { TCP_CHAR_BREAKPOINT_REMOVE, '\0' }; + strcpy(handle_breakpoint_remove_cmd_desc.schema, + (char[4]) { ARG_SCHEMA_CORENUM, ARG_SCHEMA_INT, + ARG_SCHEMA_UINT64_T, '\0' }); + cmd_parser =3D &handle_breakpoint_remove_cmd_desc; + } + break; default: /* command not supported */ mcd_put_packet(""); --=20 2.34.1