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[50.253.99.174]) by smtp.gmail.com with ESMTPSA id v4sm3508528ilq.57.2021.11.04.20.20.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Nov 2021 20:20:04 -0700 (PDT) From: Warner Losh To: qemu-devel@nongnu.org Subject: [PATCH v4 18/36] bsd-user/arm/target_arch_cpu.h: Implement trivial EXCP exceptions Date: Thu, 4 Nov 2021 21:18:59 -0600 Message-Id: <20211105031917.87837-19-imp@bsdimp.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211105031917.87837-1-imp@bsdimp.com> References: <20211105031917.87837-1-imp@bsdimp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: none client-ip=2607:f8b0:4864:20::134; envelope-from=imp@bsdimp.com; helo=mail-il1-x134.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=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: , Cc: Stacey Son , qemu-trivial@nongnu.org, Michael Tokarev , Richard Henderson , Philippe Mathieu-Daude , Laurent Vivier , =?UTF-8?q?Mika=C3=ABl=20Urankar?= , Kyle Evans , Warner Losh Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Implement EXCP_UDEF, EXCP_DEBUG, EXCP_INTERRUPT, EXCP_ATOMIC and EXCP_YIELD. The first two generate a signal to the emulated binary. EXCP_ATOMIC handles atomic operations. The remainder are fancy nops. Signed-off-by: Stacey Son Signed-off-by: Mikaël Urankar Signed-off-by: Kyle Evans Signed-off-by: Warner Losh Reviewed-by: Richard Henderson --- bsd-user/arm/target_arch_cpu.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/bsd-user/arm/target_arch_cpu.h b/bsd-user/arm/target_arch_cpu.h index 2484bdc2f7..9f9b380b13 100644 --- a/bsd-user/arm/target_arch_cpu.h +++ b/bsd-user/arm/target_arch_cpu.h @@ -48,6 +48,39 @@ static inline void target_cpu_loop(CPUARMState *env) cpu_exec_end(cs); process_queued_cpu_work(cs); switch (trapnr) { + case EXCP_UDEF: + { + /* See arm/arm/undefined.c undefinedinstruction(); */ + info.si_addr = env->regs[15]; + + /* illegal instruction */ + info.si_signo = TARGET_SIGILL; + info.si_errno = 0; + info.si_code = TARGET_ILL_ILLOPC; + queue_signal(env, info.si_signo, &info); + + /* TODO: What about instruction emulation? */ + } + break; + case EXCP_INTERRUPT: + /* just indicate that signals should be handled asap */ + break; + case EXCP_DEBUG: + { + + info.si_signo = TARGET_SIGTRAP; + info.si_errno = 0; + info.si_code = TARGET_TRAP_BRKPT; + info.si_addr = env->exception.vaddress; + queue_signal(env, info.si_signo, &info); + } + break; + case EXCP_ATOMIC: + cpu_exec_step_atomic(cs); + break; + case EXCP_YIELD: + /* nothing to do here for user-mode, just resume guest code */ + break; default: fprintf(stderr, "qemu: unhandled CPU exception 0x%x - aborting\n", trapnr); -- 2.33.0