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[211.28.135.144]) by smtp.gmail.com with ESMTPSA id t21sm48501628pgg.24.2018.12.25.12.58.16 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 25 Dec 2018 12:58:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=ZTs2r59Ft+IG561CkrryL8mIt/UbyiqnLbp0AprPxMQ=; b=ckmlMGPoXCp0DzfTKvupSGMSwuzMyVZi8p7hg5KsQD3ubKUhRfxSF5e+fFQLRkMhNX cfWNLRpDV3W08wodkW+KXKndHsv1vFW1+nSntZVYFdkME6eoTWlnkgGT1C4Wa/kxcuiX 7hztM1mD3ag2pcch9AB4moyCSlUfoxdHLAbQM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=ZTs2r59Ft+IG561CkrryL8mIt/UbyiqnLbp0AprPxMQ=; b=qdP1oaKR8Y9EQHv4rZZXOsoY9eCXZIyANVp4auJjLxU7LdZwHC1flCcJwERAevZSEW 87PIuiMzLgUNb8bPcW1quRvXrnItLjLsJH5ijZ16qg//Smp3CSKA5fZDjsYVoJ5lw4sI fdBYZ61jZtipNAviOYDiA09wzRxJK+CT+e7aE9r8rTDjfGcb/4onLDNJTZdWmzZKJ8tk YOoQO2xiZxkl3DDD6PnmoxmMAUCqTqtoHMw7ugm9FNuz+LQhZkQmncxfpg1ZbrqZeyQX 8NNQMP/KZrXVeafyDZq7ckpFLD1eUlDi+nST/5We0Q4Oof3hlfIX3WJvPFDbI7iq+07Y NIIA== X-Gm-Message-State: AJcUukf46nrdSlLoIY9OhdgLaJ3IWhQ3Iy0hFEcdS5/+R1+AxhQNoneS eyDe1J+HMI2nPma303rbI4YH9onNR+Q= X-Google-Smtp-Source: ALg8bN5U0qZeI6Gx5kumwMI8fnu9HzYaejWJB3h7OKNaOY2IwWKzYyqVdbaj3een70YR29tyU2m6fg== X-Received: by 2002:a63:9501:: with SMTP id p1mr16743458pgd.149.1545771502323; Tue, 25 Dec 2018 12:58:22 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Date: Wed, 26 Dec 2018 07:55:08 +1100 Message-Id: <20181225205529.10874-22-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.2 In-Reply-To: <20181225205529.10874-1-richard.henderson@linaro.org> References: <20181225205529.10874-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::52b Subject: [Qemu-devel] [PULL 21/42] tcg: Add RISC-V cpu signal handler 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: peter.maydell@linaro.org, Michael Clark , Alistair Francis Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Alistair Francis Signed-off-by: Alistair Francis Signed-off-by: Michael Clark Reviewed-by: Richard Henderson Message-Id: Signed-off-by: Richard Henderson --- accel/tcg/user-exec.c | 75 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c index cd75829cf2..941295ea49 100644 --- a/accel/tcg/user-exec.c +++ b/accel/tcg/user-exec.c @@ -571,6 +571,81 @@ int cpu_signal_handler(int host_signum, void *pinfo, return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask); } =20 +#elif defined(__riscv) + +int cpu_signal_handler(int host_signum, void *pinfo, + void *puc) +{ + siginfo_t *info =3D pinfo; + ucontext_t *uc =3D puc; + greg_t pc =3D uc->uc_mcontext.__gregs[REG_PC]; + uint32_t insn =3D *(uint32_t *)pc; + int is_write =3D 0; + + /* Detect store by reading the instruction at the program + counter. Note: we currently only generate 32-bit + instructions so we thus only detect 32-bit stores */ + switch (((insn >> 0) & 0b11)) { + case 3: + switch (((insn >> 2) & 0b11111)) { + case 8: + switch (((insn >> 12) & 0b111)) { + case 0: /* sb */ + case 1: /* sh */ + case 2: /* sw */ + case 3: /* sd */ + case 4: /* sq */ + is_write =3D 1; + break; + default: + break; + } + break; + case 9: + switch (((insn >> 12) & 0b111)) { + case 2: /* fsw */ + case 3: /* fsd */ + case 4: /* fsq */ + is_write =3D 1; + break; + default: + break; + } + break; + default: + break; + } + } + + /* Check for compressed instructions */ + switch (((insn >> 13) & 0b111)) { + case 7: + switch (insn & 0b11) { + case 0: /*c.sd */ + case 2: /* c.sdsp */ + is_write =3D 1; + break; + default: + break; + } + break; + case 6: + switch (insn & 0b11) { + case 0: /* c.sw */ + case 3: /* c.swsp */ + is_write =3D 1; + break; + default: + break; + } + break; + default: + break; + } + + return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask); +} + #else =20 #error host CPU specific signal handler needed --=20 2.17.2