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Wed, 07 Feb 2024 08:38:25 -0800 (PST) X-Forwarded-Encrypted: i=1; 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 From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org Cc: devel@lists.libvirt.org, Jiaxun Yang , Daniel Henrique Barboza , Chris Wulff , Weiwei Li , Bin Meng , Thomas Huth , qemu-riscv@nongnu.org, Marek Vasut , Liu Zhiwei , Aleksandar Rikalo , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Alistair Francis , Warner Losh , Paolo Bonzini , Aurelien Jarno , Beraldo Leal , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Max Filippov , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Ed Maste , Palmer Dabbelt , Li-Wen Hsu , Laurent Vivier , Kyle Evans , Wainer dos Santos Moschetta , Riku Voipio , Ilya Leoshkevich Subject: [PATCH v2 12/14] gdbstub: Add syscall entry/return hooks Date: Wed, 7 Feb 2024 16:38:10 +0000 Message-Id: <20240207163812.3231697-13-alex.bennee@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240207163812.3231697-1-alex.bennee@linaro.org> References: <20240207163812.3231697-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable 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=2a00:1450:4864:20::32c; envelope-from=alex.bennee@linaro.org; helo=mail-wm1-x32c.google.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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1707324029755100015 From: Ilya Leoshkevich The upcoming syscall catchpoint support needs to get control on syscall entry and return. Provide the necessary hooks for that, which are no-ops for now. Signed-off-by: Ilya Leoshkevich Message-Id: <20240202152506.279476-4-iii@linux.ibm.com> Signed-off-by: Alex Benn=C3=A9e --- include/gdbstub/user.h | 13 +++++++++++++ include/user/syscall-trace.h | 7 +++++-- gdbstub/user.c | 8 ++++++++ 3 files changed, 26 insertions(+), 2 deletions(-) diff --git a/include/gdbstub/user.h b/include/gdbstub/user.h index 1fc43e04af5..68b6534130c 100644 --- a/include/gdbstub/user.h +++ b/include/gdbstub/user.h @@ -51,5 +51,18 @@ void gdb_signalled(CPUArchState *as, int sig); */ void gdbserver_fork(CPUState *cs); =20 +/** + * gdb_syscall_entry() - inform gdb of syscall entry and yield control to = it + * @cs: CPU + * @num: syscall number + */ +void gdb_syscall_entry(CPUState *cs, int num); + +/** + * gdb_syscall_entry() - inform gdb of syscall return and yield control to= it + * @cs: CPU + * @num: syscall number + */ +void gdb_syscall_return(CPUState *cs, int num); =20 #endif /* GDBSTUB_USER_H */ diff --git a/include/user/syscall-trace.h b/include/user/syscall-trace.h index 557f881a79b..b48b2b2d0ae 100644 --- a/include/user/syscall-trace.h +++ b/include/user/syscall-trace.h @@ -11,6 +11,7 @@ #define SYSCALL_TRACE_H =20 #include "exec/user/abitypes.h" +#include "gdbstub/user.h" #include "qemu/plugin.h" #include "trace/trace-root.h" =20 @@ -20,7 +21,7 @@ * could potentially unify the -strace code here as well. */ =20 -static inline void record_syscall_start(void *cpu, int num, +static inline void record_syscall_start(CPUState *cpu, int num, abi_long arg1, abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6, @@ -29,11 +30,13 @@ static inline void record_syscall_start(void *cpu, int = num, qemu_plugin_vcpu_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8); + gdb_syscall_entry(cpu, num); } =20 -static inline void record_syscall_return(void *cpu, int num, abi_long ret) +static inline void record_syscall_return(CPUState *cpu, int num, abi_long = ret) { qemu_plugin_vcpu_syscall_ret(cpu, num, ret); + gdb_syscall_return(cpu, num); } =20 =20 diff --git a/gdbstub/user.c b/gdbstub/user.c index 63edca131ab..2ba01c17faf 100644 --- a/gdbstub/user.c +++ b/gdbstub/user.c @@ -502,3 +502,11 @@ void gdb_syscall_handling(const char *syscall_packet) gdb_put_packet(syscall_packet); gdb_handlesig(gdbserver_state.c_cpu, 0); } + +void gdb_syscall_entry(CPUState *cs, int num) +{ +} + +void gdb_syscall_return(CPUState *cs, int num) +{ +} --=20 2.39.2