Date: Fri, 16 Apr 2021 13:52:44 GMT From: Mitchell Horne <mhorne@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 17b0a38d96fe - stable/13 - arm64: clear debug register state on fork Message-ID: <202104161352.13GDqi7q021960@gitrepo.freebsd.org>
next in thread | raw e-mail | index | archive | help
The branch stable/13 has been updated by mhorne: URL: https://cgit.FreeBSD.org/src/commit/?id=17b0a38d96feb77d4b019ab9108b2c5050273823 commit 17b0a38d96feb77d4b019ab9108b2c5050273823 Author: Mitchell Horne <mhorne@FreeBSD.org> AuthorDate: 2021-04-07 19:23:46 +0000 Commit: Mitchell Horne <mhorne@FreeBSD.org> CommitDate: 2021-04-16 13:47:32 +0000 arm64: clear debug register state on fork Following the analogous change for amd64 and i386 in 8223717ce62c, ensure that new processes start with these registers inactive. PR: 254661 Reported by: Michał Górny Reviewed by: kib, emaste Sponsored by: The FreeBSD Foundation (cherry picked from commit 1fd001db9c330f133708f3c04c8852f8b07cfed9) --- sys/arm64/arm64/vm_machdep.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sys/arm64/arm64/vm_machdep.c b/sys/arm64/arm64/vm_machdep.c index ac2a47597a8c..b2ab8bb463b0 100644 --- a/sys/arm64/arm64/vm_machdep.c +++ b/sys/arm64/arm64/vm_machdep.c @@ -93,6 +93,9 @@ cpu_fork(struct thread *td1, struct proc *p2, struct thread *td2, int flags) td2->td_pcb = pcb2; bcopy(td1->td_pcb, pcb2, sizeof(*pcb2)); + /* Clear the debug register state. */ + bzero(&pcb2->pcb_dbg_regs, sizeof(pcb2->pcb_dbg_regs)); + tf = (struct trapframe *)STACKALIGN((struct trapframe *)pcb2 - 1); bcopy(td1->td_frame, tf, sizeof(*tf)); tf->tf_x[0] = 0;
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?202104161352.13GDqi7q021960>