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Wed, 18 Aug 2021 12:19:29 -0700 (PDT) Received: from localhost.localdomain ([173.197.107.15]) by smtp.gmail.com with ESMTPSA id a6sm524108pjs.40.2021.08.18.12.19.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Aug 2021 12:19:29 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v3 05/66] target/arm: Implement do_unaligned_access for user-only Date: Wed, 18 Aug 2021 09:18:19 -1000 Message-Id: <20210818191920.390759-6-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210818191920.390759-1-richard.henderson@linaro.org> References: <20210818191920.390759-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::52b; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x52b.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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- linux-user/aarch64/cpu_loop.c | 4 ++++ linux-user/arm/cpu_loop.c | 43 +++++++++++++++++++++++++++-------- target/arm/cpu.c | 2 +- target/arm/cpu_tcg.c | 2 +- 4 files changed, 40 insertions(+), 11 deletions(-) diff --git a/linux-user/aarch64/cpu_loop.c b/linux-user/aarch64/cpu_loop.c index ee72a1c20f..998831f87f 100644 --- a/linux-user/aarch64/cpu_loop.c +++ b/linux-user/aarch64/cpu_loop.c @@ -137,6 +137,10 @@ void cpu_loop(CPUARMState *env) case 0x11: /* Synchronous Tag Check Fault */ info.si_code = TARGET_SEGV_MTESERR; break; + case 0x21: /* Alignment fault */ + info.si_signo = TARGET_SIGBUS; + info.si_code = TARGET_BUS_ADRALN; + break; default: g_assert_not_reached(); } diff --git a/linux-user/arm/cpu_loop.c b/linux-user/arm/cpu_loop.c index 69632d15be..da7da6a0c1 100644 --- a/linux-user/arm/cpu_loop.c +++ b/linux-user/arm/cpu_loop.c @@ -23,6 +23,7 @@ #include "elf.h" #include "cpu_loop-common.h" #include "semihosting/common-semi.h" +#include "target/arm/syndrome.h" #define get_user_code_u32(x, gaddr, env) \ ({ abi_long __r = get_user_u32((x), (gaddr)); \ @@ -286,9 +287,8 @@ void cpu_loop(CPUARMState *env) { CPUState *cs = env_cpu(env); int trapnr; - unsigned int n, insn; + unsigned int n, insn, ec, fsc; target_siginfo_t info; - uint32_t addr; abi_ulong ret; for(;;) { @@ -437,15 +437,40 @@ void cpu_loop(CPUARMState *env) break; case EXCP_PREFETCH_ABORT: case EXCP_DATA_ABORT: - addr = env->exception.vaddress; - { - info.si_signo = TARGET_SIGSEGV; - info.si_errno = 0; - /* XXX: check env->error_code */ + info.si_signo = TARGET_SIGSEGV; + info.si_errno = 0; + info._sifields._sigfault._addr = env->exception.vaddress; + /* + * We should only arrive here with EC in {DATAABORT, INSNABORT}, + * and short-form FSC, which then tells us to look at the FSR. + * ??? arm_cpu_reset never sets TTBCR_EAE, so we always get + * short-form FSC. + */ + ec = syn_get_ec(env->exception.syndrome); + assert(ec == EC_DATAABORT || ec == EC_INSNABORT); + fsc = extract32(env->exception.syndrome, 0, 6); + assert(fsc == 0x3f); + switch (env->exception.fsr & 0x1f) { + case 0x1: /* Alignment */ + info.si_signo = TARGET_SIGBUS; + info.si_code = TARGET_BUS_ADRALN; + break; + case 0x3: /* Access flag fault, level 1 */ + case 0x6: /* Access flag fault, level 2 */ + case 0x9: /* Domain fault, level 1 */ + case 0xb: /* Domain fault, level 2 */ + case 0xd: /* Permision fault, level 1 */ + case 0xf: /* Permision fault, level 2 */ + info.si_code = TARGET_SEGV_ACCERR; + break; + case 0x5: /* Translation fault, level 1 */ + case 0x7: /* Translation fault, level 2 */ info.si_code = TARGET_SEGV_MAPERR; - info._sifields._sigfault._addr = addr; - queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); + break; + default: + g_assert_not_reached(); } + queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); break; case EXCP_DEBUG: case EXCP_BKPT: diff --git a/target/arm/cpu.c b/target/arm/cpu.c index 2866dd7658..de0d968d76 100644 --- a/target/arm/cpu.c +++ b/target/arm/cpu.c @@ -1987,11 +1987,11 @@ static const struct TCGCPUOps arm_tcg_ops = { .cpu_exec_interrupt = arm_cpu_exec_interrupt, .tlb_fill = arm_cpu_tlb_fill, .debug_excp_handler = arm_debug_excp_handler, + .do_unaligned_access = arm_cpu_do_unaligned_access, #if !defined(CONFIG_USER_ONLY) .do_interrupt = arm_cpu_do_interrupt, .do_transaction_failed = arm_cpu_do_transaction_failed, - .do_unaligned_access = arm_cpu_do_unaligned_access, .adjust_watchpoint_address = arm_adjust_watchpoint_address, .debug_check_watchpoint = arm_debug_check_watchpoint, .debug_check_breakpoint = arm_debug_check_breakpoint, diff --git a/target/arm/cpu_tcg.c b/target/arm/cpu_tcg.c index ed444bf436..1b91fdc890 100644 --- a/target/arm/cpu_tcg.c +++ b/target/arm/cpu_tcg.c @@ -904,11 +904,11 @@ static const struct TCGCPUOps arm_v7m_tcg_ops = { .cpu_exec_interrupt = arm_v7m_cpu_exec_interrupt, .tlb_fill = arm_cpu_tlb_fill, .debug_excp_handler = arm_debug_excp_handler, + .do_unaligned_access = arm_cpu_do_unaligned_access, #if !defined(CONFIG_USER_ONLY) .do_interrupt = arm_v7m_cpu_do_interrupt, .do_transaction_failed = arm_cpu_do_transaction_failed, - .do_unaligned_access = arm_cpu_do_unaligned_access, .adjust_watchpoint_address = arm_adjust_watchpoint_address, .debug_check_watchpoint = arm_debug_check_watchpoint, .debug_check_breakpoint = arm_debug_check_breakpoint, -- 2.25.1