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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 18:12:22 -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=6YW5guTHBvWRMH5moaLCydApEzADr3l/GtZeuUgDhrc=; b=aMkJ4w/Yny6+pdVD3hYHRBvqRE/lqIl3BBbUEd3d1QYWLir1opI0DYlnvy8Eh27RB3 AoQQBvLHLsRDQFRifL59EabzRchHKSoGd/VFWH+Ycw/AZtw5sqG+X1NU3xuMJA2qdk2h czZUQ7rNOHm3T5vMiAzT0gUDLCe8mIDZ+BCeg9MMP+qJX3fAcHxn+PD8y5vUwqzXKXnb 6rwX1wDNTk+eoFtGyEuhIuiC4WbjOianqTmWCRrLxmEZQMHPY1BuJZ7HwM3iDZOu4Fzb QW9Egqhmh3S2dJ6JQIapv7AhImMszNNT9NXFaRV6Zk1MMqhLYlNB6Tt6jRn8tJyzocnE 8LoA== 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=6YW5guTHBvWRMH5moaLCydApEzADr3l/GtZeuUgDhrc=; b=MhTSrfesRob+lTa5etzWAqJYspf9WMQQ3JgA9cXOCC8e3hID6gmKeEfWR5D1eyNGy+ 75SISw/UqK6g1/9Ogf0joyN8g1zWXEkWFxbZYL5LzI3UBttE7zKo1aYPCE1ym4AwGr1p gTkjp/Fu8x622rL5zJjKJKw9S/Ux+0N3u7xtRKBK4/8/W/M5qj9PQYdZf0mKS2sBB5md HxgWk+WYtKaHs06M6auS6lWQCPf8wWMptEzzbURfeNgeXGPMRNXdAKuTRnoa1z1qtcPb 8Qb18j24o/1YbNojzxX9IngLZ62FuzqMhHWjk+uTRiAo3hsI4ss+Wv7Vcra126lxQVGh L8kw== X-Gm-Message-State: AOAM533Y7CuYwpRmlBhtsS9V4hsxDJZpe21MYAhFLlMtQ3mIrxcEXR4/ KSJ0AJTVYRupZO/U5tyfG7JLllbG2MUrwg== X-Google-Smtp-Source: ABdhPJxB4Tg3Wp7+gq1klXZ8EQUNXyjgP3xE97RAnzmdWSUX1oOLbKGyyc7h+ZHP3rcsmrgkLvXv9w== X-Received: by 2002:a17:902:9049:b029:116:e060:c464 with SMTP id w9-20020a1709029049b0290116e060c464mr6815773plz.1.1623805942712; Tue, 15 Jun 2021 18:12:22 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH 19/21] linux-user/sparc: Implement setup_sigtramp Date: Tue, 15 Jun 2021 18:12:07 -0700 Message-Id: <20210616011209.1446045-20-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::1036; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1036.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=unavailable 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: Mark Cave-Ayland , 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 two signal trampolines. Use them when the guest does not use SA_RESTORER. Cc: Mark Cave-Ayland Signed-off-by: Richard Henderson --- linux-user/sparc/target_signal.h | 4 ++++ linux-user/sparc/signal.c | 32 ++++++++++++++++++-------------- 2 files changed, 22 insertions(+), 14 deletions(-) diff --git a/linux-user/sparc/target_signal.h b/linux-user/sparc/target_sig= nal.h index 34f9a12519..e661ddd6ab 100644 --- a/linux-user/sparc/target_signal.h +++ b/linux-user/sparc/target_signal.h @@ -69,6 +69,10 @@ typedef struct target_sigaltstack { =20 #ifdef TARGET_ABI32 #define TARGET_ARCH_HAS_SETUP_FRAME +#define TARGET_ARCH_HAS_SIGTRAMP_PAGE 1 +#else +/* For sparc64, use of KA_RESTORER is mandatory. */ +#define TARGET_ARCH_HAS_SIGTRAMP_PAGE 0 #endif =20 /* bit-flags */ diff --git a/linux-user/sparc/signal.c b/linux-user/sparc/signal.c index 0cc3db5570..65e9b7f8b4 100644 --- a/linux-user/sparc/signal.c +++ b/linux-user/sparc/signal.c @@ -290,13 +290,7 @@ void setup_frame(int sig, struct target_sigaction *ka, if (ka->ka_restorer) { env->regwptr[WREG_O7] =3D ka->ka_restorer; } else { - env->regwptr[WREG_O7] =3D sf_addr + - offsetof(struct target_signal_frame, insns) - 2 * 4; - - /* mov __NR_sigreturn, %g1 */ - __put_user(0x821020d8u, &sf->insns[0]); - /* t 0x10 */ - __put_user(0x91d02010u, &sf->insns[1]); + env->regwptr[WREG_O7] =3D default_sigreturn; } unlock_user(sf, sf_addr, sf_size); } @@ -357,13 +351,7 @@ void setup_rt_frame(int sig, struct target_sigaction *= ka, if (ka->ka_restorer) { env->regwptr[WREG_O7] =3D ka->ka_restorer; } else { - env->regwptr[WREG_O7] =3D - sf_addr + offsetof(struct target_rt_signal_frame, insns) - 2 *= 4; - - /* mov __NR_rt_sigreturn, %g1 */ - __put_user(0x82102065u, &sf->insns[0]); - /* t 0x10 */ - __put_user(0x91d02010u, &sf->insns[1]); + env->regwptr[WREG_O7] =3D default_rt_sigreturn; } #else env->regwptr[WREG_O7] =3D ka->ka_restorer; @@ -774,4 +762,20 @@ do_sigsegv: unlock_user_struct(ucp, ucp_addr, 1); force_sig(TARGET_SIGSEGV); } +#else +void setup_sigtramp(abi_ulong sigtramp_page) +{ + uint32_t *tramp =3D lock_user(VERIFY_WRITE, sigtramp_page, 2 * 8, 0); + assert(tramp !=3D NULL); + + default_sigreturn =3D sigtramp_page; + __put_user(0x821020d8u, &tramp[0]); /* mov __NR_sigreturn, %g1 */ + __put_user(0x91d02010u, &tramp[1]); /* t 0x10 */ + + default_rt_sigreturn =3D sigtramp_page + 8; + __put_user(0x82102065u, &tramp[2]); /* mov __NR_rt_sigreturn, %g1 */ + __put_user(0x91d02010u, &tramp[3]); /* t 0x10 */ + + unlock_user(tramp, sigtramp_page, 2 * 8); +} #endif --=20 2.25.1