From owner-dev-commits-src-main@freebsd.org Wed Mar 17 20:20:25 2021 Return-Path: Delivered-To: dev-commits-src-main@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 5DF19577D8C; Wed, 17 Mar 2021 20:20:25 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4F11k11wPgz3H6k; Wed, 17 Mar 2021 20:20:25 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 307531503D; Wed, 17 Mar 2021 20:20:25 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 12HKKPQv082866; Wed, 17 Mar 2021 20:20:25 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 12HKKPB1082865; Wed, 17 Mar 2021 20:20:25 GMT (envelope-from git) Date: Wed, 17 Mar 2021 20:20:25 GMT Message-Id: <202103172020.12HKKPB1082865@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: John Baldwin Subject: git: 0723b409150a - main - aarch64: Clear TLS registers during exec(). MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: jhb X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: 0723b409150ae302eb021cbde86a5f77348a1bb4 Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-main@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commit messages for the main branch of the src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 Mar 2021 20:20:25 -0000 The branch main has been updated by jhb: URL: https://cgit.FreeBSD.org/src/commit/?id=0723b409150ae302eb021cbde86a5f77348a1bb4 commit 0723b409150ae302eb021cbde86a5f77348a1bb4 Author: John Baldwin AuthorDate: 2021-03-17 20:19:04 +0000 Commit: John Baldwin CommitDate: 2021-03-17 20:19:04 +0000 aarch64: Clear TLS registers during exec(). These are not stored in the trapframe so must be cleared explicitly. This is similar to one of the MIPS changes in 822d2d6ac94f. Reviewed by: andrew Obtained from: CheriBSD MFC after: 1 week Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D28711 --- sys/arm64/arm64/machdep.c | 5 +++++ sys/arm64/linux/linux_sysvec.c | 5 +++++ 2 files changed, 10 insertions(+) diff --git a/sys/arm64/arm64/machdep.c b/sys/arm64/arm64/machdep.c index 91f0a31ebe36..97f97392e43f 100644 --- a/sys/arm64/arm64/machdep.c +++ b/sys/arm64/arm64/machdep.c @@ -561,6 +561,11 @@ exec_setregs(struct thread *td, struct image_params *imgp, uintptr_t stack) tf->tf_lr = imgp->entry_addr; tf->tf_elr = imgp->entry_addr; + td->td_pcb->pcb_tpidr_el0 = 0; + td->td_pcb->pcb_tpidrro_el0 = 0; + WRITE_SPECIALREG(tpidrro_el0, 0); + WRITE_SPECIALREG(tpidr_el0, 0); + #ifdef VFP vfp_reset_state(td, pcb); #endif diff --git a/sys/arm64/linux/linux_sysvec.c b/sys/arm64/linux/linux_sysvec.c index 67feacfa876b..df16db4040a7 100644 --- a/sys/arm64/linux/linux_sysvec.c +++ b/sys/arm64/linux/linux_sysvec.c @@ -365,6 +365,11 @@ linux_exec_setregs(struct thread *td, struct image_params *imgp, #endif regs->tf_elr = imgp->entry_addr; + td->td_pcb->pcb_tpidr_el0 = 0; + td->td_pcb->pcb_tpidrro_el0 = 0; + WRITE_SPECIALREG(tpidrro_el0, 0); + WRITE_SPECIALREG(tpidr_el0, 0); + #ifdef VFP vfp_reset_state(td, td->td_pcb); #endif