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Tue, 16 Sep 2025 11:06:15 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PULL 02/36] linux-user/aarch64: Split out signal_for_exception Date: Tue, 16 Sep 2025 19:05:36 +0100 Message-ID: <20250916180611.1481266-3-peter.maydell@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250916180611.1481266-1-peter.maydell@linaro.org> References: <20250916180611.1481266-1-peter.maydell@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::42d; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x42d.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 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-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1758046033676116600 From: Richard Henderson Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Pierrick Bouvier Signed-off-by: Richard Henderson Message-id: 20250830054128.448363-2-richard.henderson@linaro.org Signed-off-by: Peter Maydell --- linux-user/aarch64/cpu_loop.c | 84 ++++++++++++++++++++--------------- 1 file changed, 47 insertions(+), 37 deletions(-) diff --git a/linux-user/aarch64/cpu_loop.c b/linux-user/aarch64/cpu_loop.c index 4c4921152e8..3b2782581b6 100644 --- a/linux-user/aarch64/cpu_loop.c +++ b/linux-user/aarch64/cpu_loop.c @@ -27,11 +27,56 @@ #include "target/arm/syndrome.h" #include "target/arm/cpu-features.h" =20 +/* Use the exception syndrome to map a cpu exception to a signal. */ +static void signal_for_exception(CPUARMState *env, vaddr addr) +{ + uint32_t syn =3D env->exception.syndrome; + int si_code, si_signo; + + switch (syn_get_ec(syn)) { + case EC_DATAABORT: + case EC_INSNABORT: + /* Both EC have the same format for FSC, or close enough. */ + switch (extract32(syn, 0, 6)) { + case 0x04 ... 0x07: /* Translation fault, level {0-3} */ + si_signo =3D TARGET_SIGSEGV; + si_code =3D TARGET_SEGV_MAPERR; + break; + case 0x09 ... 0x0b: /* Access flag fault, level {1-3} */ + case 0x0d ... 0x0f: /* Permission fault, level {1-3} */ + si_signo =3D TARGET_SIGSEGV; + si_code =3D TARGET_SEGV_ACCERR; + break; + case 0x11: /* Synchronous Tag Check Fault */ + si_signo =3D TARGET_SIGSEGV; + si_code =3D TARGET_SEGV_MTESERR; + break; + case 0x21: /* Alignment fault */ + si_signo =3D TARGET_SIGBUS; + si_code =3D TARGET_BUS_ADRALN; + break; + default: + g_assert_not_reached(); + } + break; + + case EC_PCALIGNMENT: + si_signo =3D TARGET_SIGBUS; + si_code =3D TARGET_BUS_ADRALN; + break; + + default: + g_assert_not_reached(); + } + + force_sig_fault(si_signo, si_code, addr); +} + /* AArch64 main loop */ void cpu_loop(CPUARMState *env) { CPUState *cs =3D env_cpu(env); - int trapnr, ec, fsc, si_code, si_signo; + int trapnr; abi_long ret; =20 for (;;) { @@ -67,42 +112,7 @@ void cpu_loop(CPUARMState *env) break; case EXCP_PREFETCH_ABORT: case EXCP_DATA_ABORT: - ec =3D syn_get_ec(env->exception.syndrome); - switch (ec) { - case EC_DATAABORT: - case EC_INSNABORT: - /* Both EC have the same format for FSC, or close enough. = */ - fsc =3D extract32(env->exception.syndrome, 0, 6); - switch (fsc) { - case 0x04 ... 0x07: /* Translation fault, level {0-3} */ - si_signo =3D TARGET_SIGSEGV; - si_code =3D TARGET_SEGV_MAPERR; - break; - case 0x09 ... 0x0b: /* Access flag fault, level {1-3} */ - case 0x0d ... 0x0f: /* Permission fault, level {1-3} */ - si_signo =3D TARGET_SIGSEGV; - si_code =3D TARGET_SEGV_ACCERR; - break; - case 0x11: /* Synchronous Tag Check Fault */ - si_signo =3D TARGET_SIGSEGV; - si_code =3D TARGET_SEGV_MTESERR; - break; - case 0x21: /* Alignment fault */ - si_signo =3D TARGET_SIGBUS; - si_code =3D TARGET_BUS_ADRALN; - break; - default: - g_assert_not_reached(); - } - break; - case EC_PCALIGNMENT: - si_signo =3D TARGET_SIGBUS; - si_code =3D TARGET_BUS_ADRALN; - break; - default: - g_assert_not_reached(); - } - force_sig_fault(si_signo, si_code, env->exception.vaddress); + signal_for_exception(env, env->exception.vaddress); break; case EXCP_DEBUG: case EXCP_BKPT: --=20 2.43.0