From nobody Tue Jun 16 10:24:26 2026 Received: from todd.t-8ch.de (todd.t-8ch.de [159.69.126.157]) (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 F35841C6FF5 for ; Sat, 18 Apr 2026 10:32:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.69.126.157 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776508324; cv=none; b=oqfO4C7ZW78RtxfwFC6KsWttXchWFv8Ky/r5XZQq9vGMbpyjPS80Js9q2CQuQHYbczfaiOGYnC7hFgKlyxW7GCLV0C00naxU404EJh+zHMQmkMYCKB7RuNJAUBlB/0QeouHd0KGpChaCeicxEPr58Grl5As2SimXkEXcn5v5Z4U= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776508324; c=relaxed/simple; bh=i2MZ8H9k3HV2Cz2R3z2YDGTfcZ0s5TPKbNxyXoXXZmc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=JQJGqGBF5Ln25RzAhJ77ohUdOqvCStMR6LP0ChdMDQOt7SKmrBmIphFOj5PRYdLm0mue8fB+6xEdF0mJd7j09UTxOuAMPnRapv5ho9/DY9WODQTMmtmN5DA/XsqNLMazZsDF0DvNHE1ocr5rEvHj27+YnSqMsKJP4DKSORPB8rY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=weissschuh.net; spf=pass smtp.mailfrom=weissschuh.net; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b=s067+0+b; arc=none smtp.client-ip=159.69.126.157 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b="s067+0+b" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1776508321; bh=i2MZ8H9k3HV2Cz2R3z2YDGTfcZ0s5TPKbNxyXoXXZmc=; h=From:Date:Subject:To:Cc:From; b=s067+0+boiNlwgCexLhBT233z0dIUq/m0j1g4w40qPLUMa7f9iVwYPaD6NwEfUZXq AZQMlF0itT12U+cqegI9cXOafFK0dIeXrdPa2FUOzyeJvgGLRRZL/qeu/szrr0NS9i 4/RQ7HECf2te8HtDWEhLXtqzQABdiExbfmlUtbXY= From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= Date: Sat, 18 Apr 2026 12:31:54 +0200 Subject: [PATCH] tools/nolibc: avoid call to wcslen() in _start_c() inserted by clang 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: <20260418-nolibc-wcslen-v1-1-671271b8ea63@weissschuh.net> X-B4-Tracking: v=1; b=H4sIAAAAAAAC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyDHUUlJIzE vPSU3UzU4B8JSMDIzMDE0ML3bz8nMykZN3y5OKc1Dxd08S0xGSL1CRjQ4skJaCegqLUtMwKsHn RsRB+cWlSVmpyCcgQpdpaANUVGS1xAAAA X-Change-ID: 20260418-nolibc-wcslen-5afac8eb318b To: Willy Tarreau Cc: linux-kernel@vger.kernel.org, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1776508319; l=935; i=linux@weissschuh.net; s=20221212; h=from:subject:message-id; bh=i2MZ8H9k3HV2Cz2R3z2YDGTfcZ0s5TPKbNxyXoXXZmc=; b=sWDluvcXhI15V1qQGIDrz8Nipt+pgbPnx2hdSsUlB9VN5DgCb8WvuHuPb4A9it6qPPP6WmmWo NXrLAyIS5UbB2qJwObxYL2sAlYP3b3cBtc0DbjrZ5K4wnjAtVmCf/la X-Developer-Key: i=linux@weissschuh.net; a=ed25519; pk=KcycQgFPX2wGR5azS7RhpBqedglOZVgRPfdFSPB1LNw= Clang may convert the loop to find _auxv into a call to wcslen() which is missing on nolibc. -fsanitize needs to be disabled for this to happen. Use the same pattern as in the nolibc strlen() implementation to avoid the function call generation. Signed-off-by: Thomas Wei=C3=9Fschuh Acked-by: Willy Tarreau --- tools/include/nolibc/crt.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/include/nolibc/crt.h b/tools/include/nolibc/crt.h index d8ce91fd2e3b..f38590a05adf 100644 --- a/tools/include/nolibc/crt.h +++ b/tools/include/nolibc/crt.h @@ -89,7 +89,7 @@ void _start_c(long *sp) =20 /* find _auxv */ for (auxv =3D (void *)envp; *auxv++;) - ; + __asm__(""); _auxv =3D auxv; =20 #ifndef NOLIBC_IGNORE_ERRNO --- base-commit: b5ac9d2dc1330d0b16a141962ac202739b091efd change-id: 20260418-nolibc-wcslen-5afac8eb318b Best regards, -- =20 Thomas Wei=C3=9Fschuh