From owner-dev-commits-src-branches@freebsd.org Mon Mar 29 22:35:09 2021 Return-Path: Delivered-To: dev-commits-src-branches@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 8BE285ADE77; Mon, 29 Mar 2021 22:35:09 +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 4F8S7x3TxPz4pCJ; Mon, 29 Mar 2021 22:35:09 +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 664D81B644; Mon, 29 Mar 2021 22:35:09 +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 12TMZ9nE093451; Mon, 29 Mar 2021 22:35:09 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 12TMZ97h093450; Mon, 29 Mar 2021 22:35:09 GMT (envelope-from git) Date: Mon, 29 Mar 2021 22:35:09 GMT Message-Id: <202103292235.12TMZ97h093450@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: John Baldwin Subject: git: c6b96921a819 - stable/13 - 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/stable/13 X-Git-Reftype: branch X-Git-Commit: c6b96921a81968aa768b45e32195854aaec81331 Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-branches@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commits to the stable branches of the FreeBSD src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Mar 2021 22:35:09 -0000 The branch stable/13 has been updated by jhb: URL: https://cgit.FreeBSD.org/src/commit/?id=c6b96921a81968aa768b45e32195854aaec81331 commit c6b96921a81968aa768b45e32195854aaec81331 Author: John Baldwin AuthorDate: 2021-03-17 20:19:04 +0000 Commit: John Baldwin CommitDate: 2021-03-29 22:17:04 +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. Obtained from: CheriBSD Sponsored by: DARPA (cherry picked from commit 0723b409150ae302eb021cbde86a5f77348a1bb4) --- 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 c825c1a18c70..8a1e7520aacb 100644 --- a/sys/arm64/arm64/machdep.c +++ b/sys/arm64/arm64/machdep.c @@ -560,6 +560,11 @@ 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