From nobody Wed Oct 8 02:20:35 2025 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (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 711F82E5400; Thu, 3 Jul 2025 12:39:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751546355; cv=none; b=BfaqyRyeaaPV9PLnYZELz0+CHrMEhihNrCEIbCNO7pdvNerOmCzcB9woVvAU4NWJ/xeJ0XHx52DNEv4y862IB4DLek5v0NZh2NdpKcy8KuXqjiOriBMWPDYN5rbCk6jCkp3/+2OmiDKmCeTxpx7NEpy8oN/Y1s8LlejILbRZfng= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751546355; c=relaxed/simple; bh=sS5BJFq5yl1Cpp9kuGgfCMujzkfDmeSN9fqRocDqWZY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=eS3wEp0ttuxK5gB9ilz/01NuRW03+vHTJLCZC5WjchDwabZO4WMyGKbvmOzsUx0/o44kzmerDUFcHBO+kpAR3QbufearcVL7+5ANgII29LtT5HNLV2tden92NAMbg4vGrY2XuJuIWOFNr8F/NEoCNDpG7B/hqREq/tg4klOICTo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=vzXpOSXZ; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=FzUfzSgG; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="vzXpOSXZ"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="FzUfzSgG" From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1751546351; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+Z0MqZuZk9ZorWcjtJWd2TxVCHlbiuTD5yZSdlZfeII=; b=vzXpOSXZEV/ki4Fz56c1LN7R+SoJv7a0tWyetgyw+Vv2V+U76gNI8tlqrmISKPXQy2SY6D 0aqIr6/cHHuvlHMtZnazdEKO51Qb7fktkaM8LmoP47mIV/n8oERHZG4r7fNG9M1yvbgPsm pgYQmojQGYmXDyHS4cfaLe0WeLAH2JSdJHdKq1vUJHD7EHAGXVDsqMMuf0+2VpUmHHV7wg zE5IJjDCpmOvhkxkrrGUN7IBkErGnLEbnCOpVkstow06QoCV80pFViZkqdU2eV4I0PuNAr jbuvUxzD0pMvKIfYqx1aVt31nmEGX36gXVOXfDG5764NtgD+A6Nwf5l1tFc1hw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1751546351; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+Z0MqZuZk9ZorWcjtJWd2TxVCHlbiuTD5yZSdlZfeII=; b=FzUfzSgGPqvzHpwS71OnYN2WaJ+oJocoZiFsGmmcKJzDy6QxguVcuw8gMFoxVG2PvZI6Na mYXsXWIucs0CCKDg== Date: Thu, 03 Jul 2025 14:38:55 +0200 Subject: [PATCH 2/2] um/ptrace: Implement HAVE_SYSCALL_TRACEPOINTS Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250703-uml-have_syscall_tracepoints-v1-2-23c1d3808578@linutronix.de> References: <20250703-uml-have_syscall_tracepoints-v1-0-23c1d3808578@linutronix.de> In-Reply-To: <20250703-uml-have_syscall_tracepoints-v1-0-23c1d3808578@linutronix.de> To: Richard Weinberger , Anton Ivanov , Johannes Berg , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers Cc: linux-um@lists.infradead.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Nam Cao , =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Developer-Signature: v=1; a=ed25519-sha256; t=1751546346; l=2501; i=thomas.weissschuh@linutronix.de; s=20240209; h=from:subject:message-id; bh=sS5BJFq5yl1Cpp9kuGgfCMujzkfDmeSN9fqRocDqWZY=; b=sGqrzfKZ+sO/4nzPW8zOoYWd7/SFalzFdwiFKLOhLCnOKZyiaLC0lwAQxnyzYWV3KIvuw15HZ AZJ7dueIW2tBUs+uy/X0/KmVvlNUmUJC+ibbivqmdK9MkypSeTSxHxf X-Developer-Key: i=thomas.weissschuh@linutronix.de; a=ed25519; pk=pfvxvpFUDJV2h2nY0FidLUml22uGLSjByFbM6aqQQws= Implement syscall tracepoints through the generic tracing infrastructure. Signed-off-by: Thomas Wei=C3=9Fschuh Reviewed-by: Nam Cao --- arch/um/Kconfig | 1 + arch/um/include/asm/thread_info.h | 2 ++ arch/um/kernel/ptrace.c | 9 +++++++++ 3 files changed, 12 insertions(+) diff --git a/arch/um/Kconfig b/arch/um/Kconfig index f08e8a7fac93d9f98384de02710542fd75d23553..c2d2d2d99bbe3f5a5dc4afaa69e= 02a520e326c2d 100644 --- a/arch/um/Kconfig +++ b/arch/um/Kconfig @@ -35,6 +35,7 @@ config UML select HAVE_RUST select ARCH_HAS_UBSAN select HAVE_ARCH_TRACEHOOK + select HAVE_SYSCALL_TRACEPOINTS select THREAD_INFO_IN_TASK =20 config MMU diff --git a/arch/um/include/asm/thread_info.h b/arch/um/include/asm/thread= _info.h index f9ad06fcc991a2b10e2aa6059880b993e3d60a2d..b8c021f97bd17515e4f9082206a= ddfce05b9321e 100644 --- a/arch/um/include/asm/thread_info.h +++ b/arch/um/include/asm/thread_info.h @@ -43,6 +43,8 @@ struct thread_info { #define TIF_NOTIFY_RESUME 8 #define TIF_SECCOMP 9 /* secure computing */ #define TIF_SINGLESTEP 10 /* single stepping userspace */ +#define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */ + =20 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c index 2124624b7817439b8e1c962e8e6eb0e267db6f53..fdbb37b5c3996188d92cf307d31= eeaeca1f0acce 100644 --- a/arch/um/kernel/ptrace.c +++ b/arch/um/kernel/ptrace.c @@ -9,6 +9,9 @@ #include #include =20 +#define CREATE_TRACE_POINTS +#include + void user_enable_single_step(struct task_struct *child) { set_tsk_thread_flag(child, TIF_SINGLESTEP); @@ -126,6 +129,9 @@ int syscall_trace_enter(struct pt_regs *regs) UPT_SYSCALL_ARG3(®s->regs), UPT_SYSCALL_ARG4(®s->regs)); =20 + if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) + trace_sys_enter(regs, UPT_SYSCALL_NR(®s->regs)); + if (!test_thread_flag(TIF_SYSCALL_TRACE)) return 0; =20 @@ -142,6 +148,9 @@ void syscall_trace_leave(struct pt_regs *regs) if (test_thread_flag(TIF_SINGLESTEP)) send_sigtrap(®s->regs, 0); =20 + if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) + trace_sys_exit(regs, PT_REGS_SYSCALL_RET(regs)); + if (!test_thread_flag(TIF_SYSCALL_TRACE)) return; =20 --=20 2.50.0