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[174.21.70.228]) by smtp.gmail.com with ESMTPSA id y18sm305297pgk.53.2021.06.15.18.12.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 15 Jun 2021 18:12:23 -0700 (PDT) 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 :mime-version:content-transfer-encoding; bh=COVeNQV9BBulXNDLKWwOqJGZ7zBHmRTYrf/xguIv+OU=; b=qD7/36kFVmvwhUT7pFuHSEzVsphnUjzB8+KlfN7GwYW+PoDmk0NuN+doPjauZa5+2E tMbBGqi9duoqV+NsMNdkHMHK/vbNEfSxuT1cl4253++DoAPcg4wHOJxOEgGinqZkXMP8 fkJK3I06POcVj1xa6UYhluQDsHeETYgOBj3XUHnaobJv6TxoVC4DukQj1l9Z5muKifC0 dYmT5q8lHXtLi0jIIs/LF4lKkI5o6ZP7MDxgrDy/tsL9vOPkonMTLUwCEp41Zyzkl/kE I/GuxJB95HXKjVDux+LKZOtGx64IWc2j2T5ACDm02Ly0vRttWG1i8eqIlYoWSTcgIi0A zMtQ== 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:mime-version:content-transfer-encoding; bh=COVeNQV9BBulXNDLKWwOqJGZ7zBHmRTYrf/xguIv+OU=; b=cMJjvih0BSJK2mivOMsXW/hmRG/NlBzJxBPqoknvVDfrlgzcjQsvVxWmuMvAhgysip j9pmH9Kf9e+99IU40dUvRvxtIKGKxozyGth5Kdo8/iY+Zxo/PO+OC/LrbvCz7NkkfVne iF19tGk/qKuHfioTVi5Fv2qUu1YXLhYs4P7RCnyCtzj9TwgyUt3+g0YHVWkX7PodHLDn DepXNGyImJqSZ9twz87M7GsTxXa461X6YVT3vKW3ADvxx9869lpHq/RkQxt9jfgM2oB/ BkeFgVBd74PEOuWBLxMsEjAPi3YI+W4vz0hKjhT2c39grHSq3CBGa8QqF7INkeYrfVW6 //Ng== X-Gm-Message-State: AOAM532lsw53Amc9xkbxL7x+Tey592MkEM0UDJcre7OOkXZnMk2G1b3a vovYgz9E84270AGfrfAs/bRq/XQmzqBngw== X-Google-Smtp-Source: ABdhPJy3tfERkljZWHa9H5H0YR6xP3ssvBKJut6sjh7aJ1xooUuyoQp4aNb/9g38hw7KZGiUu+fchA== X-Received: by 2002:a17:90a:e2d4:: with SMTP id fr20mr8036923pjb.92.1623805943265; Tue, 15 Jun 2021 18:12:23 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH 20/21] linux-user/xtensa: Implement setup_sigtramp Date: Tue, 15 Jun 2021 18:12:08 -0700 Message-Id: <20210616011209.1446045-21-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210616011209.1446045-1-richard.henderson@linaro.org> References: <20210616011209.1446045-1-richard.henderson@linaro.org> MIME-Version: 1.0 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=2607:f8b0:4864:20::1029; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1029.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: Max Filippov , alex.bennee@linaro.org, laurent@vivier.eu Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Create and record the rt signal trampoline. Use it when the guest does not use SA_RESTORER. Cc: Max Filippov Signed-off-by: Richard Henderson Reviewed-by: Max Filippov --- linux-user/xtensa/target_signal.h | 2 ++ linux-user/xtensa/signal.c | 50 ++++++++++++++++++------------- 2 files changed, 32 insertions(+), 20 deletions(-) diff --git a/linux-user/xtensa/target_signal.h b/linux-user/xtensa/target_s= ignal.h index c60bf656f6..1c7ee73154 100644 --- a/linux-user/xtensa/target_signal.h +++ b/linux-user/xtensa/target_signal.h @@ -20,4 +20,6 @@ typedef struct target_sigaltstack { =20 #include "../generic/signal.h" =20 +#define TARGET_ARCH_HAS_SIGTRAMP_PAGE 1 + #endif diff --git a/linux-user/xtensa/signal.c b/linux-user/xtensa/signal.c index 72771e1294..fd57481bf5 100644 --- a/linux-user/xtensa/signal.c +++ b/linux-user/xtensa/signal.c @@ -163,26 +163,7 @@ void setup_rt_frame(int sig, struct target_sigaction *= ka, if (ka->sa_flags & TARGET_SA_RESTORER) { ra =3D ka->sa_restorer; } else { - ra =3D frame_addr + offsetof(struct target_rt_sigframe, retcode); -#ifdef TARGET_WORDS_BIGENDIAN - /* Generate instruction: MOVI a2, __NR_rt_sigreturn */ - __put_user(0x22, &frame->retcode[0]); - __put_user(0x0a, &frame->retcode[1]); - __put_user(TARGET_NR_rt_sigreturn, &frame->retcode[2]); - /* Generate instruction: SYSCALL */ - __put_user(0x00, &frame->retcode[3]); - __put_user(0x05, &frame->retcode[4]); - __put_user(0x00, &frame->retcode[5]); -#else - /* Generate instruction: MOVI a2, __NR_rt_sigreturn */ - __put_user(0x22, &frame->retcode[0]); - __put_user(0xa0, &frame->retcode[1]); - __put_user(TARGET_NR_rt_sigreturn, &frame->retcode[2]); - /* Generate instruction: SYSCALL */ - __put_user(0x00, &frame->retcode[3]); - __put_user(0x50, &frame->retcode[4]); - __put_user(0x00, &frame->retcode[5]); -#endif + ra =3D default_rt_sigreturn; } memset(env->regs, 0, sizeof(env->regs)); env->pc =3D ka->_sa_handler; @@ -263,3 +244,32 @@ badframe: force_sig(TARGET_SIGSEGV); return -TARGET_QEMU_ESIGRETURN; } + +void setup_sigtramp(abi_ulong sigtramp_page) +{ + uint8_t *tramp =3D lock_user(VERIFY_WRITE, sigtramp_page, 6, 0); + assert(tramp !=3D NULL); + +#ifdef TARGET_WORDS_BIGENDIAN + /* Generate instruction: MOVI a2, __NR_rt_sigreturn */ + __put_user(0x22, &tramp[0]); + __put_user(0x0a, &tramp[1]); + __put_user(TARGET_NR_rt_sigreturn, &tramp[2]); + /* Generate instruction: SYSCALL */ + __put_user(0x00, &tramp[3]); + __put_user(0x05, &tramp[4]); + __put_user(0x00, &tramp[5]); +#else + /* Generate instruction: MOVI a2, __NR_rt_sigreturn */ + __put_user(0x22, &tramp[0]); + __put_user(0xa0, &tramp[1]); + __put_user(TARGET_NR_rt_sigreturn, &tramp[2]); + /* Generate instruction: SYSCALL */ + __put_user(0x00, &tramp[3]); + __put_user(0x50, &tramp[4]); + __put_user(0x00, &tramp[5]); +#endif + + default_rt_sigreturn =3D sigtramp_page; + unlock_user(tramp, sigtramp_page, 6); +} --=20 2.25.1