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[2001:470:27:1fa::2]) by smtp.gmail.com with ESMTPSA id 1sm1304819lje.38.2018.04.05.06.47.22 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 05 Apr 2018 06:47:24 -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=PuodgsbA8IDd283uzH+24nshLtwInHw0HJpl8kdJHT0=; b=i2F6YFUg+9IdZZaR9wYmPIxnELMPbzflcAoS/NXrHc396BLb4CEnLhd6OFVnM+lKAH SbIBf0ClFmcKyX3CuVXlXeyb+tU4UV34p6NmO7AZaqQnAsajHn/C7shCcLHV7VATeVRt S+SP84OfCNdCf/DW9/3XiHkR/9mi4Ef7dXEErAM6YiINL4Zv/FsXAAQQbKToWX3ASD6P qajg3Wqg+VrXqyTZ8F3zPmEiHvH6EPVcojdWOtuMJwatoHAkJtUR0nFXtZ7NrUHnoN2h hXEh8nw4PX1ldNGfo2Epba3b6D14uNWDHzL/NsWHO+KL3zODOp3wQ01ucvehc4zzF4J6 jlqg== 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=PuodgsbA8IDd283uzH+24nshLtwInHw0HJpl8kdJHT0=; b=O39m81Bb1thkTmY6e4GlMINm8L++Fmwu2upTUDJDfHdBjH78itZdefUEe+T+6Wq4bB vBz8tIUjf9aRMi7VxsYZP0reidpEcjKH6lvi7ApznzOuDPopgbRl6hdD56e7d27nuJn5 2A7+etYas1QPzc7JNKXACmoaiTxHrJBbA0XHM7GzBptxFlx9rEmbBeAL/7SqLkWAc3WN Yl4ZLDh6HdG4IkxqLHGrtJdsasr565jsI//ZNbaMXj+TUzVAAu7ljVx7r/WbxtzUwoQx TpnaX3u+0Yet8e3ARaBO13WWjyL/Wz//78T6yk1YxAubpCyYJdvif2tw0DY0iGx5XIq6 6RhA== X-Gm-Message-State: ALQs6tBjmxRg7wIP02lL0TZztWq6YIPenExe0B5g2R/5Hzm/V0LS9Jyu pm1HbG5byOLEAwHPaT0LEij3Cw== X-Google-Smtp-Source: AIpwx4/iwD1St29eoO2LZq2f2aPLmYweLzzEmQODNlrwnzras851CxZiwv876kW9fV5WoxuDNtXyEQ== X-Received: by 2002:a19:914a:: with SMTP id y10-v6mr13990824lfj.91.1522936045446; Thu, 05 Apr 2018 06:47:25 -0700 (PDT) From: Max Filippov To: qemu-devel@nongnu.org Date: Thu, 5 Apr 2018 06:47:02 -0700 Message-Id: <20180405134702.5020-1-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:c0c::242 Subject: [Qemu-devel] [PATCH v3] 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 , Richard Henderson , 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_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 --- Changes v2->v3: - rename helper to target_to_host_low_high; - handle cases TARGET_LONG_BITS * 2 > HOST_LONG_BITS and TARGET_LONG_BITS < 2 * HOST_LONG_BITS correctly. Changes v1->v2: - fix host high computation in TARGET_LONG_BITS > HOST_LONG_BITS case linux-user/syscall.c | 34 ++++++++++++++++++++++++++++++++-- 1 file changed, 32 insertions(+), 2 deletions(-) diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 5ef517613577..13ad572e0d3b 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -3386,6 +3386,30 @@ static abi_long do_getsockopt(int sockfd, int level,= int optname, return ret; } =20 +static void target_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; +#if TARGET_LONG_BITS * 2 <=3D HOST_LONG_BITS + *hhigh =3D 0; +#else + *hhigh =3D (unsigned long)thigh >> (HOST_LONG_BITS - TARGET_LONG_B= ITS); +#endif +#else + *hlow =3D (unsigned long)tlow; + *hhigh =3D (unsigned long)(tlow >> HOST_LONG_BITS); +#if TARGET_LONG_BITS < 2 * HOST_LONG_BITS + *hhigh |=3D (unsigned long)thigh << (TARGET_LONG_BITS - HOST_LONG_= BITS); +#endif +#endif +} + static struct iovec *lock_iovec(int type, abi_ulong target_addr, abi_ulong count, int copy) { @@ -10449,7 +10473,10 @@ 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_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 +10489,10 @@ 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_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