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([172.58.111.133]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-741a71dc78asm380409a34.30.2025.08.02.16.38.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 02 Aug 2025 16:38:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1754177934; x=1754782734; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=RrRDTwGDphkvvBtsV/mK2pHDoMT9L4tWZDtSjWVgm+E=; b=Wfk0ZuNYhfQNg9bgl1kFYjOelfS6gyUWT0rtWjc8aWSEpgzVYvTJ6d1L+VzVbw3HXK Utl3/vBScFk2EJM4yxz4uwJY2VA1Jo3b7wMguhFTxVEz02D/7HYRJD4tLh3SfR2hNSu+ bl5dpINX5RQwKYbbT13Kuwta3vzLOFxCSA/Rc+KMf7GzdTdwcl4EDYfTxXtYcifGARdu cinekQzsvVz8qUnGgJaKB1NeHS3U1S3xqLM7B1ZB11wi34a/OctaK+CSXztZrzfRZ6Wf GuEY8FW/gsII7+++vJYHqD9zUVuPiPoHU6VER9In8IkScNjiaRMUq/VIY8YRBKYZvOF7 pQfg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1754177934; x=1754782734; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=RrRDTwGDphkvvBtsV/mK2pHDoMT9L4tWZDtSjWVgm+E=; b=BpeOzMA11+HI+kAyXXknkIdTNkr0GIZHlny++wqVb2Z0ZV76dOtNxII/r2tFEi4Vgw sHsCazSUhKsXYq14TtFa0YyxQreuu8USJ/fispbu8rS7ggAVGBlWPfty7q61ulnhLxYj fLY/jc0kfFD08HgUG4E8icEA3esUEKjFNna5y8wQ4lP6QixWF1QhD2hQxC9ue92PpAT6 XPLhKH3xm/hogU2DOu5LfXWufXNz5Wjv/6fkUdCJGEDz7la9i4bsZufRN4inSI+WB1R7 pRFRuT/SXf83cHJMZDdGGfmEPnXQzJ/W+kvYKUw/KQOLuu9YU/l5tIzbMjaUXAhdB1gJ NiMw== X-Gm-Message-State: AOJu0YyesgZ5bHOY3waAOA9FGVEqtZOCIkxHYEAZvCoyFyixm0fsKIrC 5GXpsD0wu82Sf18hn+nYrn9qALxKOkOKbUscsTjOaq4OZjymnT3xraTMJ7tYCSH/yqUbErbkpZR d1bHjetk= X-Gm-Gg: ASbGncu+yJoinjG2JjFZpGI7MfSpSpBtV45IN7iy/zQYjaK3yAMubAsoBTyyFXpXrOp mI+3HQHHlKIYooO74HsYdh6cF72Af61ROr2EfPSr1lpxM7ScgFlw4Hs7WPNrG9/tExlkofe/L1y 16VvxcBdAYgGGyLwsqG+UVGyrL7G5Wn5cggWpp2lK3NoWb9C62SwutINjTYvO8F7FksFNHSLM6C SZOkfL9XUSFgiV4igUvUvq6LDGUeKuTwFLEzS+lkwtzD4WfxlvVG/co1O/LoWRX/0xyqSCAjZUl e4P5GeJHeMVsQbW2vjQm/nSNsr47GUO2m6RxWiIdjOyHnTopVzp50un1a1GADKTnEGgo2qQxp2K 6KkqbBfqUxoShR0EioMrX+4hpRAY/m49c6ZyaCsL6dsCzh04a58Cn X-Google-Smtp-Source: AGHT+IGw1bzQ4Rg/QOqe126gdbj/vnQBc0bhhNVwYVofR6EJ80zR6O5rhc3XIZCixKktVa9F3169iA== X-Received: by 2002:a05:6830:651a:b0:741:4a0f:b869 with SMTP id 46e09a7af769-74187ab6780mr7075066a34.13.1754177933982; Sat, 02 Aug 2025 16:38:53 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, Pierrick Bouvier Subject: [PATCH v2 75/85] linux-user/aarch64: Allocate new gcs stack on clone Date: Sun, 3 Aug 2025 09:29:43 +1000 Message-ID: <20250802232953.413294-76-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250802232953.413294-1-richard.henderson@linaro.org> References: <20250802232953.413294-1-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::32d; envelope-from=richard.henderson@linaro.org; helo=mail-ot1-x32d.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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1754179086810116600 Content-Type: text/plain; charset="utf-8" Allocate the new stack early, so that error reporting need not clean up other objects. Reviewed-by: Pierrick Bouvier Signed-off-by: Richard Henderson --- linux-user/syscall.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 2f1e881046..91210775ed 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -6652,6 +6652,21 @@ static int do_fork(CPUArchState *env, unsigned int f= lags, abi_ulong newsp, ts =3D g_new0(TaskState, 1); init_task_state(ts); =20 +#ifdef TARGET_AARCH64 + /* + * If GCS is enabled in the parent thread, it is also enabled + * in the child thread, but with a newly allocated stack. + */ + abi_long new_gcspr =3D 0; + if (env->cp15.gcscr_el[0] & GCSCR_PCRSEL) { + new_gcspr =3D gcs_new_stack(ts); + if (new_gcspr =3D=3D -1) { + g_free(ts); + return -TARGET_ENOMEM; + } + } +#endif + /* Grab a mutex so that thread setup appears atomic. */ pthread_mutex_lock(&clone_lock); =20 @@ -6676,6 +6691,11 @@ static int do_fork(CPUArchState *env, unsigned int f= lags, abi_ulong newsp, ts->info =3D parent_ts->info; ts->signal_mask =3D parent_ts->signal_mask; =20 +#ifdef TARGET_AARCH64 + ts->gcs_el0_locked =3D parent_ts->gcs_el0_locked; + new_env->cp15.gcspr_el[0] =3D new_gcspr; +#endif + if (flags & CLONE_CHILD_CLEARTID) { ts->child_tidptr =3D child_tidptr; } --=20 2.43.0