From owner-svn-src-all@freebsd.org Fri Nov 23 22:37:36 2018 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id D5FE511331A8; Fri, 23 Nov 2018 22:37:36 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 76CAD77A3B; Fri, 23 Nov 2018 22:37:36 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 58D5424E07; Fri, 23 Nov 2018 22:37:36 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id wANMbaQI017004; Fri, 23 Nov 2018 22:37:36 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id wANMbaWc017002; Fri, 23 Nov 2018 22:37:36 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201811232237.wANMbaWc017002@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Fri, 23 Nov 2018 22:37:36 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r340858 - head/libexec/rtld-elf X-SVN-Group: head X-SVN-Commit-Author: kib X-SVN-Commit-Paths: head/libexec/rtld-elf X-SVN-Commit-Revision: 340858 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 76CAD77A3B X-Spamd-Result: default: False [1.52 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_SPAM_LONG(0.40)[0.400,0]; NEURAL_SPAM_SHORT(0.41)[0.405,0]; NEURAL_SPAM_MEDIUM(0.71)[0.712,0] X-Rspamd-Server: mx1.freebsd.org X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Nov 2018 22:37:37 -0000 Author: kib Date: Fri Nov 23 22:37:35 2018 New Revision: 340858 URL: https://svnweb.freebsd.org/changeset/base/340858 Log: rtld: parse FreeBSD Feature Control note on the object load. Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Modified: head/libexec/rtld-elf/rtld.c head/libexec/rtld-elf/rtld.h Modified: head/libexec/rtld-elf/rtld.c ============================================================================== --- head/libexec/rtld-elf/rtld.c Fri Nov 23 22:36:56 2018 (r340857) +++ head/libexec/rtld-elf/rtld.c Fri Nov 23 22:37:35 2018 (r340858) @@ -1477,6 +1477,7 @@ digest_notes(Obj_Entry *obj, Elf_Addr note_start, Elf_ note->n_descsz != sizeof(int32_t)) continue; if (note->n_type != NT_FREEBSD_ABI_TAG && + note->n_type != NT_FREEBSD_FEATURE_CTL && note->n_type != NT_FREEBSD_NOINIT_TAG) continue; note_name = (const char *)(note + 1); @@ -1490,6 +1491,13 @@ digest_notes(Obj_Entry *obj, Elf_Addr note_start, Elf_ p += roundup2(note->n_namesz, sizeof(Elf32_Addr)); obj->osrel = *(const int32_t *)(p); dbg("note osrel %d", obj->osrel); + break; + case NT_FREEBSD_FEATURE_CTL: + /* FreeBSD ABI feature control note */ + p = (uintptr_t)(note + 1); + p += roundup2(note->n_namesz, sizeof(Elf32_Addr)); + obj->fctl0 = *(const uint32_t *)(p); + dbg("note fctl0 %#x", obj->fctl0); break; case NT_FREEBSD_NOINIT_TAG: /* FreeBSD 'crt does not call init' note */ Modified: head/libexec/rtld-elf/rtld.h ============================================================================== --- head/libexec/rtld-elf/rtld.h Fri Nov 23 22:36:56 2018 (r340857) +++ head/libexec/rtld-elf/rtld.h Fri Nov 23 22:37:35 2018 (r340858) @@ -235,6 +235,7 @@ typedef struct Struct_Obj_Entry { int fini_array_num; /* Number of entries in fini_array */ int32_t osrel; /* OSREL note value */ + uint32_t fctl0; /* FEATURE_CONTROL note desc[0] value */ bool mainprog : 1; /* True if this is the main program */ bool rtld : 1; /* True if this is the dynamic linker */