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[91.157.168.132]) by smtp.gmail.com with ESMTPSA id n16sm2281066lfg.31.2016.05.27.06.00.43 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 27 May 2016 06:00:43 -0700 (PDT) From: riku.voipio@linaro.org To: qemu-devel@nongnu.org Date: Fri, 27 May 2016 16:00:01 +0300 Message-Id: X-Mailer: git-send-email 2.1.4 In-Reply-To: References: X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2a00:1450:4010:c04::236 Subject: [Qemu-devel] [PULL v2 10/38] linux-user: Support for restarting system calls for SPARC targets X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Timothy E Baldwin Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Timothy E Baldwin Update the SPARC main loop and sigreturn code: * on TARGET_ERESTARTSYS, wind guest PC backwards to repeat syscall insn * set all guest CPU state within signal.c code on sigreturn * handle TARGET_QEMU_ESIGRETURN in the main loop as the indication that the main loop should not touch any guest CPU state Signed-off-by: Timothy Edward Baldwin Message-id: 1441497448-32489-9-git-send-email-T.E.Baldwin99@members.leeds.ac.uk [PMM: Commit message tweaks; drop TARGET_USE_ERESTARTSYS define] Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell Signed-off-by: Riku Voipio --- linux-user/main.c | 3 +++ linux-user/signal.c | 2 +- linux-user/sparc/target_signal.h | 1 + linux-user/sparc64/target_signal.h | 1 + 4 files changed, 6 insertions(+), 1 deletion(-) diff --git a/linux-user/main.c b/linux-user/main.c index dfc098f..04a9b9b 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -1376,6 +1376,9 @@ void cpu_loop (CPUSPARCState *env) env->regwptr[2], env->regwptr[3], env->regwptr[4], env->regwptr[5], 0, 0); + if (ret == -TARGET_ERESTARTSYS || ret == -TARGET_QEMU_ESIGRETURN) { + break; + } if ((abi_ulong)ret >= (abi_ulong)(-515)) { #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) env->xcc |= PSR_CARRY; diff --git a/linux-user/signal.c b/linux-user/signal.c index 14e58b0..e742347 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -2449,7 +2449,7 @@ long do_sigreturn(CPUSPARCState *env) goto segv_and_exit; } unlock_user_struct(sf, sf_addr, 0); - return env->regwptr[0]; + return -TARGET_QEMU_ESIGRETURN; segv_and_exit: unlock_user_struct(sf, sf_addr, 0); diff --git a/linux-user/sparc/target_signal.h b/linux-user/sparc/target_signal.h index c7de300..2df38c8 100644 --- a/linux-user/sparc/target_signal.h +++ b/linux-user/sparc/target_signal.h @@ -33,4 +33,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUSPARCState *state) return state->regwptr[UREG_FP]; } + #endif /* TARGET_SIGNAL_H */ diff --git a/linux-user/sparc64/target_signal.h b/linux-user/sparc64/target_signal.h index c7de300..2df38c8 100644 --- a/linux-user/sparc64/target_signal.h +++ b/linux-user/sparc64/target_signal.h @@ -33,4 +33,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUSPARCState *state) return state->regwptr[UREG_FP]; } + #endif /* TARGET_SIGNAL_H */