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[2001:470:27:1fa::2]) by smtp.gmail.com with ESMTPSA id m18-v6sm1257394lfj.32.2018.04.04.18.33.34 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 04 Apr 2018 18:33:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=WHgmjoJ2y7/qc1RwL/+u9Ha0jrDZImfn5cHKA9hgq/U=; b=OqpdTA8FVkXfgQMihP8JNxlvtwv1X5OnGxHkP09Tp9dr8WRezsMA3xN5PRcknK7TWP KmwQ95OVXzR45ba08eVD2LCcz/kqca9AbaZx2N/jW6rGXdL76dLZ+wfkkWrqNyPHLDFd kirRj+oxRaOU+BoB+GwhsxbLOVS3Sn1jTpeG71Oa32NuVAIDepg45ql4wexNJ7NeCOLL Ke7jF45cbNGTXJ2Zf3akkRzmyJYukKOyG/pDIqryAlrC6olReHgz6Ks2BUrn/Nw0f+vX FxcjCxwgbLMczgSpR2YC/w0BpFGqwOlVuexA3x4zLBVk/W+x3g7WgbxSCEJlho7fsy7Q o68A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=WHgmjoJ2y7/qc1RwL/+u9Ha0jrDZImfn5cHKA9hgq/U=; b=h6ZMiKVYzycbvI1PYUjCGaQdZGmVxZ4buTjAWBteIZJCWSIOaZxuRNBvbGt3Q9HD5f sQ9sbrMpqH2sOZx9ZCwweFwsU4XOKJbX1wruCCN5gywxuzjnw3Ne2iJmlGg8URb0MLx7 HpKSw1zRdelg/NBbpcTzl+CTjr8I3P6fUehn8K23axiIH8PefJ8qpbOsZlB50jxIsKjN 4wqsvmGbPMOqjkLLxm+DZymzqlcBMwx3+AE7PUacYvcA74xyT5FECk7thZJVVVKPAUiX xXGT9HsigRi03yl1ZQJ5VHLPfDNFkjeTtelPJJHoOYizF41hgBvPsjTBhz56H9Zd6yiK Q4Tw== X-Gm-Message-State: AElRT7FKXgNKCO+vCK/fLk6u47/inFUgGU+tvntRL2wJR3og9fppNvWd 6iEvVkoMsz++0VucOaKRZrDIOg== X-Google-Smtp-Source: AIpwx49Qi+Dt3AAgUqQEnhOFLNIeNQMFZkqGq/VOhpVdFXlUpvmXirAXnc+2gMXAF6LGj9Vwgei3jw== X-Received: by 10.46.137.83 with SMTP id b19mr13024668ljk.111.1522892017232; Wed, 04 Apr 2018 18:33:37 -0700 (PDT) From: Max Filippov To: qemu-devel@nongnu.org Date: Wed, 4 Apr 2018 18:33:21 -0700 Message-Id: <20180405013321.3129-1-jcmvbkbc@gmail.com> X-Mailer: git-send-email 2.11.0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:400c:c09::242 Subject: [Qemu-devel] [PATCH] linux-user: fix preadv/pwritev offsets X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Riku Voipio , Laurent Vivier , Max Filippov Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" preadv/pwritev accept low and high parts of file offset in two separate parameters. When host bitness doesn't match guest bitness these parts must be appropriately recombined. Introduce target_low_high_to_host_low_high that does this recombination and use it in preadv/pwritev syscalls. This fixes glibc testsuite test misc/tst-preadvwritev64. Signed-off-by: Max Filippov --- linux-user/syscall.c | 27 +++++++++++++++++++++++++-- 1 file changed, 25 insertions(+), 2 deletions(-) diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 5ef517613577..dfa015b9354d 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -3386,6 +3386,23 @@ static abi_long do_getsockopt(int sockfd, int level,= int optname, return ret; } =20 +static void target_low_high_to_host_low_high(abi_ulong tlow, + abi_ulong thigh, + unsigned long *hlow, + unsigned long *hhigh) +{ +#if TARGET_LONG_BITS =3D=3D HOST_LONG_BITS + *hlow =3D tlow; + *hhigh =3D thigh; +#elif TARGET_LONG_BITS < HOST_LONG_BITS + *hlow =3D tlow | (unsigned long)thigh << TARGET_LONG_BITS; + *hhigh =3D 0; +#else + *hlow =3D (unsigned long)tlow; + *hhigh =3D (unsigned long)(thigh >> HOST_LONG_BITS); +#endif +} + static struct iovec *lock_iovec(int type, abi_ulong target_addr, abi_ulong count, int copy) { @@ -10449,7 +10466,10 @@ abi_long do_syscall(void *cpu_env, int num, abi_lo= ng arg1, { struct iovec *vec =3D lock_iovec(VERIFY_WRITE, arg2, arg3, 0); if (vec !=3D NULL) { - ret =3D get_errno(safe_preadv(arg1, vec, arg3, arg4, arg5)= ); + unsigned long low, high; + + target_low_high_to_host_low_high(arg4, arg5, &low, &high); + ret =3D get_errno(safe_preadv(arg1, vec, arg3, low, high)); unlock_iovec(vec, arg2, arg3, 1); } else { ret =3D -host_to_target_errno(errno); @@ -10462,7 +10482,10 @@ abi_long do_syscall(void *cpu_env, int num, abi_lo= ng arg1, { struct iovec *vec =3D lock_iovec(VERIFY_READ, arg2, arg3, 1); if (vec !=3D NULL) { - ret =3D get_errno(safe_pwritev(arg1, vec, arg3, arg4, arg5= )); + unsigned long low, high; + + target_low_high_to_host_low_high(arg4, arg5, &low, &high); + ret =3D get_errno(safe_pwritev(arg1, vec, arg3, low, high)= ); unlock_iovec(vec, arg2, arg3, 0); } else { ret =3D -host_to_target_errno(errno); --=20 2.11.0