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Thu, 13 Jun 2019 18:23:28 +0200 To: Richard Henderson , qemu-devel@nongnu.org References: <20190519201953.20161-1-richard.henderson@linaro.org> <20190519201953.20161-5-richard.henderson@linaro.org> From: Laurent Vivier Openpgp: preference=signencrypt Autocrypt: addr=laurent@vivier.eu; prefer-encrypt=mutual; keydata= mQINBFYFJhkBEAC2me7w2+RizYOKZM+vZCx69GTewOwqzHrrHSG07MUAxJ6AY29/+HYf6EY2 WoeuLWDmXE7A3oJoIsRecD6BXHTb0OYS20lS608anr3B0xn5g0BX7es9Mw+hV/pL+63EOCVm SUVTEQwbGQN62guOKnJJJfphbbv82glIC/Ei4Ky8BwZkUuXd7d5NFJKC9/GDrbWdj75cDNQx UZ9XXbXEKY9MHX83Uy7JFoiFDMOVHn55HnncflUncO0zDzY7CxFeQFwYRbsCXOUL9yBtqLer Ky8/yjBskIlNrp0uQSt9LMoMsdSjYLYhvk1StsNPg74+s4u0Q6z45+l8RAsgLw5OLtTa+ePM JyS7OIGNYxAX6eZk1+91a6tnqfyPcMbduxyBaYXn94HUG162BeuyBkbNoIDkB7pCByed1A7q q9/FbuTDwgVGVLYthYSfTtN0Y60OgNkWCMtFwKxRaXt1WFA5ceqinN/XkgA+vf2Ch72zBkJL RBIhfOPFv5f2Hkkj0MvsUXpOWaOjatiu0fpPo6Hw14UEpywke1zN4NKubApQOlNKZZC4hu6/ 8pv2t4HRi7s0K88jQYBRPObjrN5+owtI51xMaYzvPitHQ2053LmgsOdN9EKOqZeHAYG2SmRW LOxYWKX14YkZI5j/TXfKlTpwSMvXho+efN4kgFvFmP6WT+tPnwARAQABtCJMYXVyZW50IFZp dmllciA8bGF1cmVudEB2aXZpZXIuZXU+iQI4BBMBAgAiBQJWBTDeAhsDBgsJCAcDAgYVCAIJ CgsEFgIDAQIeAQIXgAAKCRDzDDi9Py++PCEdD/oD8LD5UWxhQrMQCsUgLlXCSM7sxGLkwmmF ozqSSljEGRhffxZvO35wMFcdX9Z0QOabVoFTKrT04YmvbjsErh/dP5zeM/4EhUByeOS7s6Yl HubMXVQTkak9Wa9Eq6irYC6L41QNzz/oTwNEqL1weV1+XC3TNnht9B76lIaELyrJvRfgsp9M rE+PzGPo5h7QHWdL/Cmu8yOtPLa8Y6l/ywEJ040IoiAUfzRoaJs2csMXf0eU6gVBhCJ4bs91 jtWTXhkzdl4tdV+NOwj3j0ukPy+RjqeL2Ej+bomnPTOW8nAZ32dapmu7Fj7VApuQO/BSIHyO NkowMMjB46yohEepJaJZkcgseaus0x960c4ua/SUm/Nm6vioRsxyUmWd2nG0m089pp8LPopq WfAk1l4GciiMepp1Cxn7cnn1kmG6fhzedXZ/8FzsKjvx/aVeZwoEmucA42uGJ3Vk9TiVdZes lqMITkHqDIpHjC79xzlWkXOsDbA2UY/P18AtgJEZQPXbcrRBtdSifCuXdDfHvI+3exIdTpvj BfbgZAar8x+lcsQBugvktlQWPfAXZu4Shobi3/mDYMEDOE92dnNRD2ChNXg2IuvAL4OW40wh gXlkHC1ZgToNGoYVvGcZFug1NI+vCeCFchX+L3bXyLMg3rAfWMFPAZLzn42plIDMsBs+x2yP +bkCDQRWBSYZARAAvFJBFuX9A6eayxUPFaEczlMbGXugs0mazbOYGlyaWsiyfyc3PStHLFPj rSTaeJpPCjBJErwpZUN4BbpkBpaJiMuVO6egrC8Xy8/cnJakHPR2JPEvmj7Gm/L9DphTcE15 92rxXLesWzGBbuYxKsj8LEnrrvLyi3kNW6B5LY3Id+ZmU8YTQ2zLuGV5tLiWKKxc6s3eMXNq wrJTCzdVd6ThXrmUfAHbcFXOycUyf9vD+s+WKpcZzCXwKgm7x1LKsJx3UhuzT8ier1L363RW ZaJBZ9CTPiu8R5NCSn9V+BnrP3wlFbtLqXp6imGhazT9nJF86b5BVKpF8Vl3F0/Y+UZ4gUwL d9cmDKBcmQU/JaRUSWvvolNu1IewZZu3rFSVgcpdaj7F/1aC0t5vLdx9KQRyEAKvEOtCmP4m 38kU/6r33t3JuTJnkigda4+Sfu5kYGsogeYG6dNyjX5wpK5GJIJikEhdkwcLM+BUOOTi+I9u tX03BGSZo7FW/J7S9y0l5a8nooDs2gBRGmUgYKqQJHCDQyYut+hmcr+BGpUn9/pp2FTWijrP inb/Pc96YDQLQA1q2AeAFv3Rx3XoBTGl0RCY4KZ02c0kX/dm3eKfMX40XMegzlXCrqtzUk+N 8LeipEsnOoAQcEONAWWo1HcgUIgCjhJhBEF0AcELOQzitbJGG5UAEQEAAYkCHwQYAQIACQUC VgUmGQIbDAAKCRDzDDi9Py++PCD3D/9VCtydWDdOyMTJvEMRQGbx0GacqpydMEWbE3kUW0ha US5jz5gyJZHKR3wuf1En/3z+CEAEfP1M3xNGjZvpaKZXrgWaVWfXtGLoWAVTfE231NMQKGoB w2Dzx5ivIqxikXB6AanBSVpRpoaHWb06tPNxDL6SVV9lZpUn03DSR6gZEZvyPheNWkvz7bE6 FcqszV/PNvwm0C5Ju7NlJA8PBAQjkIorGnvN/vonbVh5GsRbhYPOc/JVwNNr63P76rZL8Gk/ hb3xtcIEi5CCzab45+URG/lzc6OV2nTj9Lg0SNcRhFZ2ILE3txrmI+aXmAu26+EkxLLfqCVT ohb2SffQha5KgGlOSBXustQSGH0yzzZVZb+HZPEvx6d/HjQ+t9sO1bCpEgPdZjyMuuMp9N1H ctbwGdQM2Qb5zgXO+8ZSzwC+6rHHIdtcB8PH2j+Nd88dVGYlWFKZ36ELeZxD7iJflsE8E8yg OpKgu3nD0ahBDqANU/ZmNNarBJEwvM2vfusmNnWm3QMIwxNuJghRyuFfx694Im1js0ZY3LEU JGSHFG4ZynA+ZFUPA6Xf0wHeJOxGKCGIyeKORsteIqgnkINW9fnKJw2pgk8qHkwVc3Vu+wGS ZiJK0xFusPQehjWTHn9WjMG1zvQ5TQQHxau/2FkP45+nRPco6vVFQe8JmgtRF8WFJA== Message-ID: <938e1083-b068-9eaf-8c34-a8f64da48557@vivier.eu> Date: Thu, 13 Jun 2019 18:23:27 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 In-Reply-To: <20190519201953.20161-5-richard.henderson@linaro.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-Provags-ID: V03:K1:GZxHllOzK47FEJiXTAL/KSAS+lY9JTMfffLeZpMaJMx8g7c6dhj Vj7rKp8b/90MlSXSN3UzJoa/FUJx0S8Vj9NIx8DvCsQ+f4F9cwW0V2bAiObg4mUKrfCms5r YJWgAGwW6WvqzbK5gPf9M5CFsTu9QyJ8HmuAGni+FvsBNAHF6Gra0tAhRbD3tY9798JSYQH Zv2EL3akN4qi4nnWpHC0w== X-UI-Out-Filterresults: notjunk:1;V03:K0:AwAJpt5v9IQ=:z3SoZiiAWYaFm9o/GNBmg+ /RJ7A9ug5naDZZoXcdbixkxbLbnvUMN27dRDVV7XvKIooVnFQ5FR8BwwQkbPal3Q25V4XfMj/ M5jWRx345XGb3UW2YSNrX/00w8EItJZuKq4A71uRp3smccXQgx7eKxkqdN8/CenUzYYhrBBul LQKfFjoESYdZfPopmAQowVDdP2V/9FpaYQDyePhPSIIp99/rA2ZLKheBHy3QQxbc4ocVlRJCK dpoeVuclmBtrPYv4BByv1gBLf744UKndGourR+qJ0P/HSQEBR+R+e0//bahobAITjNS+wOXSP b5uMjiKxs92dHhZp+Mx7JlxuAb196kGOieEwv3OqUd/WMGFA5AceFPioUhsimGPK2RKSsLuKK ZZX1xXo51rNDNd4sTs6EjMWa+FAR5ZgXtEmqq2DiFUtPoUuMlAi1WPmSlvPIWzAxn7FXBpwii t0iVBoJc69pHV76HhY7SjtePl4FV59VakaE5it+4VUB/Z+o3TqJhoeZ3r+l2xyQhFVeXnDmG0 57xM21pKGl1woGGCf7lLT48qnRvdSyzEKEdkWlMJeB3kNuQKn9DpbkYMJCnBAeR/rkO0faxh7 qa7XH65DZijKKuMUfvMdvCKrTSJ2z4WPUYTxJPJe2gad7/qud6vSYE64JYHATX9uTXjJmuJUI q7L+Xk5ITJA1jWnDZVWCYihUsCfyYxdQf9ESHm5KlO1L/2tqN3smlB2pBG2gnWhLX5LYmhqeq 3SRR4LPggMrDnxOauSue4IUcWyvLZ3h5/0QHLY19UEFJy2AzRiazSygyw1s= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 212.227.17.13 Subject: Re: [Qemu-devel] [PATCH 04/13] linux-user/alpha: Set r20 secondary return value X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Le 19/05/2019 à 22:19, Richard Henderson a écrit : > This value is not, as far as I know, used by any linux software, > but it is set by the kernel and is part of the ABI. > > Signed-off-by: Richard Henderson > --- > linux-user/alpha/target_cpu.h | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/linux-user/alpha/target_cpu.h b/linux-user/alpha/target_cpu.h > index 140a459f73..caadb54372 100644 > --- a/linux-user/alpha/target_cpu.h > +++ b/linux-user/alpha/target_cpu.h > @@ -26,10 +26,12 @@ static inline void cpu_clone_regs_child(CPUAlphaState *env, target_ulong newsp) > } > env->ir[IR_V0] = 0; > env->ir[IR_A3] = 0; > + env->ir[IR_A4] = 1; /* OSF/1 secondary return: child */ > } > > static inline void cpu_clone_regs_parent(CPUAlphaState *env) > { > + env->ir[IR_A4] = 0; /* OSF/1 secondary return: parent */ In the kernel, r20 is only set to 0 if !(clone_flags & CLONE_SETTLS), is this a problem here to set it unconditionally? Thanks, Laurent