From nobody Tue Feb 10 07:57:54 2026 Received: from canpmsgout04.his.huawei.com (canpmsgout04.his.huawei.com [113.46.200.219]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3D37A329C41; Mon, 22 Dec 2025 11:48:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=113.46.200.219 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766404115; cv=none; b=RJaS85/fWerVV2bKes3UiRot48zt2ETwOjmEpdRa60aDHcB/X6TBfaw5NW/3lH9n9EgRKtWDfxa10+5wbhvi3S+uQ++DLctWtXqx4lHT4q9xqxgKTk10vOEhefVZUmcGirUgN8lZlyrzHftJWL1k2L0f8JHIvJLh38p8xuQbE3w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766404115; c=relaxed/simple; bh=lefHAzKDKk5qEfqBW32KoQp/TdE0goG7qq83kn2U5bk=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=YHIDM5qwRzlyQSkELUF9bZxFzK5ZP63AZm3o/dtlD9wJ34UrwefdDXhEn4LksVOvo6ZPEPztrpNATuOtS1Sy95B47ZDuEU7OebkffV13ziQ1ZZVb4dHQ8V0Z03symbuhxhIBSTYTh03ROCR1pQN+ViXrb093ugTh4BeAqWatCzY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; dkim=pass (1024-bit key) header.d=huawei.com header.i=@huawei.com header.b=UONZScV/; arc=none smtp.client-ip=113.46.200.219 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=huawei.com header.i=@huawei.com header.b="UONZScV/" dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=MorARlqx1l48FFO5oJ77A55XAj+4n5dHHdsXuHM6xN8=; b=UONZScV/ePtCxaIDIy35CLn5B4653E8MxmSuL1RtbMG6Clq73beIwnhhOz22EOidPtMS/SL+E 6j3d9QWzoSvq/lugQ6Eiij3Z6Bl3Z+Pjyjf5jy3dlBjLh1DEUlQACHPeExlrwM55Z268VeYKU01 wqX6joJS1BZBLSnQnBD9TrA= Received: from mail.maildlp.com (unknown [172.19.162.140]) by canpmsgout04.his.huawei.com (SkyGuard) with ESMTPS id 4dZbtB4dVnz1prN7; Mon, 22 Dec 2025 19:45:22 +0800 (CST) Received: from dggpemf500011.china.huawei.com (unknown [7.185.36.131]) by mail.maildlp.com (Postfix) with ESMTPS id 77417201E8; Mon, 22 Dec 2025 19:48:30 +0800 (CST) Received: from huawei.com (10.90.53.73) by dggpemf500011.china.huawei.com (7.185.36.131) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Mon, 22 Dec 2025 19:48:28 +0800 From: Jinjie Ruan To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v10 12/16] entry: Add arch_ptrace_report_syscall_entry/exit() Date: Mon, 22 Dec 2025 19:47:33 +0800 Message-ID: <20251222114737.1334364-13-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20251222114737.1334364-1-ruanjinjie@huawei.com> References: <20251222114737.1334364-1-ruanjinjie@huawei.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: kwepems100001.china.huawei.com (7.221.188.238) To dggpemf500011.china.huawei.com (7.185.36.131) Content-Type: text/plain; charset="utf-8" Differ from generic entry, due to historical reasons, ARM64 need to save/restore during syscall entry/exit because ARM64 use a scratch register (ip(r12) on AArch32, x7 on AArch64) to denote syscall entry/exit. In preparation for moving arm64 over to the generic entry code, add arch_ptrace_report_syscall_entry/exit() as the default ptrace_report_syscall_entry/exit() implementation. This allows arm64 to implement the architecture specific version. This allows arm64 to implement the architecture specific version. Reviewed-by: Kevin Brodsky Suggested-by: Mark Rutland Suggested-by: Thomas Gleixner Signed-off-by: Jinjie Ruan --- include/linux/entry-common.h | 39 +++++++++++++++++++++++++++++++++++ kernel/entry/syscall-common.c | 4 ++-- 2 files changed, 41 insertions(+), 2 deletions(-) diff --git a/include/linux/entry-common.h b/include/linux/entry-common.h index 0de0e60630e1..17171e8873fc 100644 --- a/include/linux/entry-common.h +++ b/include/linux/entry-common.h @@ -45,6 +45,25 @@ SYSCALL_WORK_SYSCALL_EXIT_TRAP | \ ARCH_SYSCALL_WORK_EXIT) =20 +/** + * arch_ptrace_report_syscall_entry - Architecture specific + * ptrace_report_syscall_entry(). + * + * Invoked from syscall_trace_enter() to wrap ptrace_report_syscall_entry(= ). + * Defaults to ptrace_report_syscall_entry. + * + * The main purpose is to support arch-specific ptrace_report_syscall_entr= y() + * implementation. + */ +static __always_inline int arch_ptrace_report_syscall_entry(struct pt_regs= *regs); + +#ifndef arch_ptrace_report_syscall_entry +static __always_inline int arch_ptrace_report_syscall_entry(struct pt_regs= *regs) +{ + return ptrace_report_syscall_entry(regs); +} +#endif + long syscall_trace_enter(struct pt_regs *regs, long syscall, unsigned long= work); =20 /** @@ -112,6 +131,26 @@ static __always_inline long syscall_enter_from_user_mo= de(struct pt_regs *regs, l return ret; } =20 +/** + * arch_ptrace_report_syscall_exit - Architecture specific + * ptrace_report_syscall_exit. + * + * Invoked from syscall_exit_work() to wrap ptrace_report_syscall_exit(). + * + * The main purpose is to support arch-specific ptrace_report_syscall_exit + * implementation. + */ +static __always_inline void arch_ptrace_report_syscall_exit(struct pt_regs= *regs, + int step); + +#ifndef arch_ptrace_report_syscall_exit +static __always_inline void arch_ptrace_report_syscall_exit(struct pt_regs= *regs, + int step) +{ + ptrace_report_syscall_exit(regs, step); +} +#endif + /** * syscall_exit_work - Handle work before returning to user mode * @regs: Pointer to current pt_regs diff --git a/kernel/entry/syscall-common.c b/kernel/entry/syscall-common.c index 940a597ded40..fe38f84dfff3 100644 --- a/kernel/entry/syscall-common.c +++ b/kernel/entry/syscall-common.c @@ -34,7 +34,7 @@ long syscall_trace_enter(struct pt_regs *regs, long sysca= ll, =20 /* Handle ptrace */ if (work & (SYSCALL_WORK_SYSCALL_TRACE | SYSCALL_WORK_SYSCALL_EMU)) { - ret =3D ptrace_report_syscall_entry(regs); + ret =3D arch_ptrace_report_syscall_entry(regs); if (ret || (work & SYSCALL_WORK_SYSCALL_EMU)) return -1L; } @@ -100,5 +100,5 @@ void syscall_exit_work(struct pt_regs *regs, unsigned l= ong work) =20 step =3D report_single_step(work); if (step || work & SYSCALL_WORK_SYSCALL_TRACE) - ptrace_report_syscall_exit(regs, step); + arch_ptrace_report_syscall_exit(regs, step); } --=20 2.34.1