From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934267AbdCVMHK (ORCPT ); Wed, 22 Mar 2017 08:07:10 -0400 Received: from mail-wm0-f65.google.com ([74.125.82.65]:35287 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934121AbdCVMHC (ORCPT ); Wed, 22 Mar 2017 08:07:02 -0400 Subject: Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START for data To: Pavel Machek References: <9ea5e137-61f9-dccc-bb9d-ac3ff86e5867@suse.cz> <20170320123222.15453-1-jslaby@suse.cz> <20170320123222.15453-2-jslaby@suse.cz> <20170321140840.GA23311@amd> Cc: mingo@redhat.com, tglx@linutronix.de, hpa@zytor.com, x86@kernel.org, jpoimboe@redhat.com, linux-kernel@vger.kernel.org, Boris Ostrovsky , Juergen Gross , xen-devel@lists.xenproject.org, "Rafael J. Wysocki" , Len Brown , linux-pm@vger.kernel.org From: Jiri Slaby Message-ID: Date: Wed, 22 Mar 2017 13:06:54 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: <20170321140840.GA23311@amd> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="Jk9RwNf315HV4omTjjBatMF11GKTiE8iC" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --Jk9RwNf315HV4omTjjBatMF11GKTiE8iC Content-Type: multipart/mixed; boundary="IStvp4RNMuu9a782H8koEmXh9KPAOc1po"; protected-headers="v1" From: Jiri Slaby To: Pavel Machek Cc: mingo@redhat.com, tglx@linutronix.de, hpa@zytor.com, x86@kernel.org, jpoimboe@redhat.com, linux-kernel@vger.kernel.org, Boris Ostrovsky , Juergen Gross , xen-devel@lists.xenproject.org, "Rafael J. Wysocki" , Len Brown , linux-pm@vger.kernel.org Message-ID: Subject: Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START for data References: <9ea5e137-61f9-dccc-bb9d-ac3ff86e5867@suse.cz> <20170320123222.15453-1-jslaby@suse.cz> <20170320123222.15453-2-jslaby@suse.cz> <20170321140840.GA23311@amd> In-Reply-To: <20170321140840.GA23311@amd> --IStvp4RNMuu9a782H8koEmXh9KPAOc1po Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hi, On 03/21/2017, 03:08 PM, Pavel Machek wrote: >> -ENTRY(saved_rbp) .quad 0 >> -ENTRY(saved_rsi) .quad 0 >> -ENTRY(saved_rdi) .quad 0 >> -ENTRY(saved_rbx) .quad 0 >> +SYM_DATA_START(saved_rbp) .quad 0 >> +SYM_DATA_START(saved_rsi) .quad 0 >> +SYM_DATA_START(saved_rdi) .quad 0 >> +SYM_DATA_START(saved_rbx) .quad 0 >=20 > Does it make sense to call it SYM_DATA_*START* when there's no > corresponding end? >=20 > Plus... it looks like saved_rsi (and friends) are only used inside > wakeup_64.S. Could we just delete the "ENTRY" annotations? So, now I have: =3D=3D=3D linkage.h =3D=3D=3D /* SYM_DATA_SIMPLE -- start+end wrapper around simple global data */ #ifndef SYM_DATA_SIMPLE #define SYM_DATA_SIMPLE(name, data) \ SYM_DATA_START(name) ASM_NL \ data ASM_NL \ SYM_DATA_END(name) #endif /* SYM_DATA_SIMPLE_LOCAL -- start+end wrapper around simple local data */= #ifndef SYM_DATA_SIMPLE_LOCAL #define SYM_DATA_SIMPLE_LOCAL(name, data) \ SYM_DATA_START_LOCAL(name) ASM_NL \ data ASM_NL \ SYM_DATA_END(name) #endif =3D=3D=3D wakeup_64.S =3D=3D=3D SYM_DATA_SIMPLE_LOCAL(saved_rbp, .quad 0) SYM_DATA_SIMPLE_LOCAL(saved_rsi, .quad 0) SYM_DATA_SIMPLE_LOCAL(saved_rdi, .quad 0) SYM_DATA_SIMPLE_LOCAL(saved_rbx, .quad 0) SYM_DATA_SIMPLE_LOCAL(saved_rip, .quad 0) SYM_DATA_SIMPLE_LOCAL(saved_rsp, .quad 0) SYM_DATA_SIMPLE_LOCAL(saved_magic, .quad 0) =3D=3D=3D original =3D=3D=3D 10: 0000000000000060 0 NOTYPE GLOBAL DEFAULT 3 saved_magic 11: 0000000000000050 0 NOTYPE GLOBAL DEFAULT 3 saved_rsp 12: 0000000000000030 0 NOTYPE GLOBAL DEFAULT 3 saved_rbx 13: 0000000000000020 0 NOTYPE GLOBAL DEFAULT 3 saved_rdi 14: 0000000000000010 0 NOTYPE GLOBAL DEFAULT 3 saved_rsi 15: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 3 saved_rbp 16: 0000000000000040 0 NOTYPE GLOBAL DEFAULT 3 saved_rip =3D=3D=3D new =3D=3D=3D 4: 0000000000000030 8 OBJECT LOCAL DEFAULT 3 saved_magic 6: 0000000000000028 8 OBJECT LOCAL DEFAULT 3 saved_rsp 7: 0000000000000018 8 OBJECT LOCAL DEFAULT 3 saved_rbx 8: 0000000000000010 8 OBJECT LOCAL DEFAULT 3 saved_rdi 9: 0000000000000008 8 OBJECT LOCAL DEFAULT 3 saved_rsi 10: 0000000000000000 8 OBJECT LOCAL DEFAULT 3 saved_rbp 11: 0000000000000020 8 OBJECT LOCAL DEFAULT 3 saved_rip =3D=3D=3D EOF =3D=3D=3D BTW, ENTRY() aligned the data to 2^4 =3D 16 as we can see in the original= =2E But I see no point aligning data like this. thanks, --=20 js suse labs --IStvp4RNMuu9a782H8koEmXh9KPAOc1po-- --Jk9RwNf315HV4omTjjBatMF11GKTiE8iC Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQJDBAEBCAAtFiEE1pWBVg1LlveO4uo2vSWxBAa0cEkFAljSaN4PHGpzbGFieUBz dXNlLmN6AAoJEL0lsQQGtHBJKW8P/itsVqEokN91qSugRFINVz7lBuWgKZEmyi+T JRp6EAxvvVvM8HRtMhzEAxXqiMfWc/7hAYmBHCb/I1/rkzHgw4rJkBGkZ+I2zGQN 4bwye0PVvSWcP++6SeYABAFtW3IHePGtrL5a8SQk6SkHfaUQ5FR/uUY6/x2plST4 5NUYMsZXenG1xqtT48ZvYCHRUfnNobFxe/bQDmIyWDcqY0C9ZPSLXsQtLGv5pnYb GMVfniFyf/JlBSmhxfjkuIdOHjyxfnLTKpLgSKNbTTUWgaWdO2d6QH3ddkO81v/N R8E/TJbUjfGNEK1JFrao/revuZd2Wsg5ZRpyGzMAlG0JJ5vjqnlfm3tb9i6oP3mz IrHpxQabaFcK59uTbUG0tP46uHF/KnqHhzOJ9je3/PhEXLprvCH1P852dQiNYE8G bpOCpa+3qNjM8H8V1eMFtpCq+VPSugnOB2HA3xjw4tiGZJgWjCtcGIPFFr2apAXv BcR9u3R+C18WMDnQoKbIpuc46gnUMmQkKyyvxb1dIPU2Ha9cnTdsadEsAgO3pIp9 zkMtxXTZL1HmXYTT+djWqQ9ipcKmyYrN+w71VP8x9kUOxQ9RY9E7Bj0T9Rhx6AQL S0wNce4S7i475PtYd2z6IzWvEDx0B7HAQoZE34oIA/8WUAerj+W/wdEtjDnZTkhg EeIjrl2V =I8cx -----END PGP SIGNATURE----- --Jk9RwNf315HV4omTjjBatMF11GKTiE8iC--