From nobody Mon Feb 9 12:24:09 2026 Received: from mail-ej1-f73.google.com (mail-ej1-f73.google.com [209.85.218.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 39B26387B16 for ; Wed, 17 Dec 2025 13:59:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765979979; cv=none; b=j8e5lLFn3cof9GTKQea4xiQP7/8sOf01KhXhmivl7a7j+QToDqm5gyxGDkxSdDNM/FU+lEpAsO9XY8rDGXNk0yWMtWKgdZ8ONiZREMkYftuY2enuQXl18m9HvJFEBJEDNq/aB9xQ07d9yR7WFTGWCzJpBzA2BG8NF/zpoZOysRo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765979979; c=relaxed/simple; bh=Xj9l/yM0SPbMt3SAV36FAlRh5ZJtA05cSb4NwKf4QhE=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=u3O1hUvdyGj95SDIi3W0GsVXHrzN6ogT8Suwn6im7hZJid83eRRIVyb9opXzFqxTKosOTd2UGz10eLOfGvbyVQ5e+QxChY8t9wzluHmuGVGKB3usEENeosNmnRv7q/gcS0aNxJ+lAhfO5oALwFQH0zBiDzyIzGqs9NFirq0R1so= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--srosek.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=WpvShJaR; arc=none smtp.client-ip=209.85.218.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--srosek.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="WpvShJaR" Received: by mail-ej1-f73.google.com with SMTP id a640c23a62f3a-b79fddf8e75so589364766b.3 for ; Wed, 17 Dec 2025 05:59:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1765979976; x=1766584776; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=2o53ko9UhCUjsjdchPJi5HhbLy/7+eH3xO+hHSEUhFk=; b=WpvShJaR7ZiqkJsZy/v3pQPmEVrys18TBvNFXfhltIHQt9J3MQIFr7fRqEyxHq6cjJ XHjJsr77T3w//x2yzWprwHwvt3ulBTvhGH4sSVy0j450pP2Ck9uvYAaqohfpnlfAOH5e fXKjsGk0X9VxNn5yX3E5VsUqawvrgoLv32LTma2FA2gqMffi1cxTWlz+V3F2WJiqXJuc wjjfak5o2/xPCe4wtukt7+wJoqA4+gLFZqaRrPG6mNZhXzaa/BqG7EdDp2WjVQHqirpf jk9T5+jH1SXWQaPaq2W98SSb4kvNTaE/f0fMkvHAmPUYSag56quru207XYEEeuPo9Zis cxqw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1765979976; x=1766584776; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=2o53ko9UhCUjsjdchPJi5HhbLy/7+eH3xO+hHSEUhFk=; b=K4ZmD8UUFOpOBqu01h/RaEpO4441nC8ppsQxsgPjCM5fVbsqA06NmpRtRscis1nQ4B Wk7QuJT9Uzt0F6ujKzZXp+jrVfTSLMzMNiPUk7zNII+qublt8fGNcz1EFv64If+cdxvt 2nqzuVDNZ46sstFc2HuvuqY77z/YI/3Sl3xhpqVat0s7m36Csg5tn2RyyDje7akd9BEd NpImKUBj90604bXGg2VdbaA0vlj3McWEGrTy4Bz6zqLki4obCMfNf1iiIcEOj0PRwMsH usObHkNCAfo91LAGu/KAqKPUNyEflxiFtJcrEwGjjrxbFDy3zB2VyDOK17ATv8qX0hC4 VGxw== X-Forwarded-Encrypted: i=1; AJvYcCVv83DHH15bJliXlB/sVMyMFN49ghZmtD6PfsJuBjNGHjzEh6vhqlKricLP/NiaoUKvjK/vKMzgdHzh998=@vger.kernel.org X-Gm-Message-State: AOJu0YyrKi19xh11Qo1Vpo4JlzW5dur7fheGNEof4kQvAG7DktLfYoQA CTWDtCdmhQZP6HKujxfiK5kzNEpITduGhozITP4dH4ULqGc7MQ4FwHlYjOp6fzRmDug+wogR7QW qwNgOZQ== X-Google-Smtp-Source: AGHT+IF1D3f84URlN255U5s63r+lnRQRT/GFNWLV/C+KzdLYEv+siEvCdtxjHeFTUkCC4hxFx+hjgFSuB38= X-Received: from ejcsk11.prod.google.com ([2002:a17:906:630b:b0:b7d:3810:9533]) (user=srosek job=prod-delivery.src-stubby-dispatcher) by 2002:a17:907:2d11:b0:b73:70db:49ab with SMTP id a640c23a62f3a-b7d237743f2mr1742928466b.35.1765979976616; Wed, 17 Dec 2025 05:59:36 -0800 (PST) Date: Wed, 17 Dec 2025 13:59:32 +0000 In-Reply-To: <20251217135932.3153847-1-srosek@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251217135932.3153847-1-srosek@google.com> X-Mailer: git-send-email 2.52.0.305.g3fc767764a-goog Message-ID: <20251217135932.3153847-3-srosek@google.com> Subject: [PATCH v1 2/2] selftests/x86/ptrace_syscall: Skip int80 if not supported From: Slawomir Rosek To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H . Peter Anvin" , Shuah Khan Cc: Betty Zhou , Wake Liu , Kazuhiro Inaba , Jeff Xu , Alistair Delva , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Slawomir Rosek Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The IA32 Emulation support can be either removed from the kernel, disabled by default or disabled at runtime. The x86/ptrace_syscall selftest crashes for all of above thus is_32bit_syscall_supported() helper is added to skip int80 syscalls if they are not supported. Signed-off-by: Slawomir Rosek --- tools/testing/selftests/x86/ptrace_syscall.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/x86/ptrace_syscall.c b/tools/testing/s= elftests/x86/ptrace_syscall.c index 360ec88d5432..6c19bea485c6 100644 --- a/tools/testing/selftests/x86/ptrace_syscall.c +++ b/tools/testing/selftests/x86/ptrace_syscall.c @@ -51,6 +51,18 @@ extern void sys32_helper(struct syscall_args32 *, void *= ); extern void int80_and_ret(void); #endif =20 +static bool is_32bit_syscall_supported(void) +{ +#ifdef __x86_64__ + return system("((zcat /proc/config.gz | grep CONFIG_IA32_EMULATION=3Dy) &= &" + "((test -z $(zcat /proc/config.gz | grep CONFIG_IA32_EMULATION_DEFAULT_D= ISABLED=3Dy)) || (grep ia32_emulation=3Dtrue /proc/cmdline)) &&" + "(test -z $(grep ia32_emulation=3Dfalse /proc/cmdline))) >/dev/null 2>&1" + ) =3D=3D 0; +#else + return true; +#endif +} + /* * Helper to invoke int80 with controlled regs and capture the final regs. */ @@ -389,8 +401,12 @@ static void test_restart_under_ptrace(void) =20 int main() { - printf("[RUN]\tCheck int80 return regs\n"); - test_sys32_regs(do_full_int80); + if (is_32bit_syscall_supported()) { + printf("[RUN]\tCheck int80 return regs\n"); + test_sys32_regs(do_full_int80); + } else { + printf("[SKIP]\t32bit syscall support is not available\n"); + } =20 #if defined(__i386__) && (!defined(__GLIBC__) || __GLIBC__ > 2 || __GLIBC_= MINOR__ >=3D 16) vsyscall32 =3D (void *)getauxval(AT_SYSINFO); --=20 2.52.0.305.g3fc767764a-goog