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[24.4.73.83]) by smtp.gmail.com with ESMTPSA id w15-20020a1709026f0f00b0018699e6afd8sm2697085plk.265.2022.12.23.11.42.46 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 23 Dec 2022 11:42:47 -0800 (PST) Message-ID: <3274f2e3-ec6d-98a6-add4-eeb78f003a05@rivosinc.com> Date: Fri, 23 Dec 2022 11:42:46 -0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.2 Subject: Re: Adding V-ext regs to signal context w/o expanding kernel struct sigcontext to avoid glibc ABI break Content-Language: en-US To: Vincent Chen Cc: Florian Weimer , Rich Felker , Andrew Waterman , Palmer Dabbelt , Kito Cheng , =?UTF-8?Q?Christoph_M=c3=bcllner?= , davidlt@rivosinc.com, Arnd Bergmann , =?UTF-8?B?QmrDtnJuIFTDtnBlbA==?= , Philipp Tomsich , Szabolcs Nagy , Andy Chiu , Greentime Hu , Aaron Durbin , Andrew de los Reyes , linux-riscv , GNU C Library References: <1631497278-29829-1-git-send-email-vincent.chen@sifive.com> <1631497278-29829-3-git-send-email-vincent.chen@sifive.com> <871r5sd1zq.fsf@oldenburg.str.redhat.com> <20210913135247.GL13220@brightrain.aerifal.cx> <87sfy5ndid.fsf@oldenburg.str.redhat.com> <73c0124c-4794-6e40-460c-b26df407f322@rivosinc.com> <50c598a6-e3b3-3062-abe7-23a406067533@rivosinc.com> <7430f494-9b43-5e03-c1e9-6b83e2611a11@rivosinc.com> From: Vineet Gupta In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221223_114253_045073_46B4F1D0 X-CRM114-Status: GOOD ( 12.74 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Ck9uIDEyLzIyLzIyIDE4OjI3LCBWaW5jZW50IENoZW4gd3JvdGU6Cj4gSWYgSSB1bmRlcnN0YW5k IGNvcnJlY3RseSwgaW4geW91ciBwYXRjaCwgdGhlIGtlcm5lbCB1c2VzIHJ0X3NpZ2ZyYW1lCj4g dG8gYmFjayB1cCBhbGwgcmVnaXN0ZXIgY29udGV4dHMgaW4gdGhlIHVzZXIgc3BhY2UsIGluY2x1 ZGluZyBSVlYKPiByZWdpc3RlcnMuCgpEaXNjdXNzaW5nIHRoaXMgYWxsIG1vb3QgcG9pbnQgYnV0 IHN0aWxsLi4uCgo+IFRoZXJlZm9yZSwgdGhlIHVzZXIgcHJvZ3JhbSBuZWVkcyB0byByZXNlcnZl IGVub3VnaCBtZW1vcnkKPiBzcGFjZSBmb3IgdGhlIGtlcm5lbCwgd2hpY2ggZW5vdWdoIHNpemUg b2YgdGhpcyBtZW1vcnkgc3BhY2UgaXMgdGhlCj4gc2l6ZW9mKHJ0X3NpZ2ZyYW1lKSBwbHVzIHJ2 dl9zY19zaXplLgoKSW4gbXkgcGF0Y2gsIHJ0X3NpZ2ZyYW1lIGhhcyB0aGUgYzk5IGZsZXhpYmxl IGFycmF5LiBTbyBpdCBkb2Vzbid0IGFkZCAKYW55IGV4dHJhIHNwYWNlIG9uIGl0cyBvd24uClRo ZSB0b3RhbCBzaXplIGluY3JlYXNlIGlzIHNhbWUgd2hldGhlciB3ZSBhZGQgaXQgdG8ga2VybmVs IHNpZ2NvbnRleHQgCm9yIHJ0X3NpZ2ZyYW1lLiBBbmQgc2luY2UgZ2xpYmMgc2lnY29udGV4dCBp cyBub3QgY2hhbmdlZCwgYXBwbGljYXRpb24gCmlzIHVuYXdhcmUgb2YgcnZ2X3NjX3NpemUgaW4g ZWl0aGVyIGNhc2UuCgo+IEhvd2V2ZXIsIHRoZSBydnZfc2Nfc2l6ZSBpcwo+IHVuZXhwZWN0ZWQg dG8gZXhpc3RpbmcgUklTQy1WIHByb2dyYW1zLgoKQWdhaW4gbm90IHN1cmUgaG93IGl0IGlzIGRp ZmZlcmVudCBpbiBib3RoIGNhc2VzLgoKPiBUaGVyZWZvcmUsIHNvbWUgbWVtb3J5IG9mIHRoZQo+ IGV4aXN0aW5nIHByb2dyYW0gbWF5IGJlIGNvcnJ1cHRlZCBieSB0aGUga2VybmVsIHdoZW4gdGhl IGtlcm5lbCBiYWNrcwo+IHVwIHRoZSBSVlYgcmVnaXN0ZXJzIGNvbnRleHQuCgprZXJuZWwgYnVp bGRzIHNpZ25hbCBmcmFtZSBvbiB0b3Agb2YgZXhpc3RpbmcgdXNlciBzdGFjay4KCnNldHVwX3J0 X2ZyYW1lCiDCoMKgwqAgZ2V0X3NpZ2ZyYW1lCiDCoMKgwqDCoMKgwqDCoMKgwqAgc3AgPSByZWdz LT5zcDsKClNvIGl0IGNhbid0IHBvc3NpYmx5IGNvcnJ1cHQgYW55IGV4aXN0aW5nIHVzZXIgc3Rh Y2sgYXJlYS4gU3VyZSB3aGVuIApleHBhbmRpbmcgdGhlIHN0YWNrIHVzZXIgc3RhY2sgcmxpbWl0 IGV0YyBtYXkgaGl0IHdoZW4gZG9pbmcgcHV0X3VzZXIuIApCdXQgYWdhaW4gdGhhdCBpcyBzYW1l IGZvciBib3RoIGFwcHJvYWNoZXMuCgpGV0lXIGtlcm5lbCB3aXRoIG15IHBhdGNoIGNhbiBiZSBm b3VuZCBiZWxvdzogaXQgc3Vydml2ZXMgZnVsbCBnbGliYyAKdGVzdHN1aXRlIHJ1biB3L28gYW55 IHJlZ3Jlc3Npb24gc28gaXQgZGVmaW5pdGVseSB3b3JrcyB3L28gYW55IG9idmlvdXMgCnVzZXIg bWVtb3J5IGNvcnJ1cHRpb24uCgpnaXQ6Ly9naXQua2VybmVsLm9yZy9wdWIvc2NtL2xpbnV4L2tl cm5lbC9naXQvdmd1cHRhL2xpbnV4LmdpdCAKI3J2di12MTMuMi11c2UtcnRfc2lnZnJhbWUKCi1W aW5lZXQKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxp bnV4LXJpc2N2IG1haWxpbmcgbGlzdApsaW51eC1yaXNjdkBsaXN0cy5pbmZyYWRlYWQub3JnCmh0 dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtcmlzY3YK