Date: Tue, 19 Jan 2021 19:06:47 GMT From: John Baldwin <jhb@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: c6e27f5697c2 - main - arm64: Clear FPU flags in the pcb in cpu_copy_thread(). Message-ID: <202101191906.10JJ6liW082938@gitrepo.freebsd.org>
next in thread | raw e-mail | index | archive | help
The branch main has been updated by jhb: URL: https://cgit.FreeBSD.org/src/commit/?id=c6e27f5697c28e188739ea1b4994dc8869dfb6c2 commit c6e27f5697c28e188739ea1b4994dc8869dfb6c2 Author: John Baldwin <jhb@FreeBSD.org> AuthorDate: 2021-01-08 22:56:54 +0000 Commit: John Baldwin <jhb@FreeBSD.org> CommitDate: 2021-01-19 19:05:48 +0000 arm64: Clear FPU flags in the pcb in cpu_copy_thread(). New threads start off with clean FPU state instead of inheriting state from the parent thread. PR: 247945 Sponsored by: Netflix --- sys/arm64/arm64/vm_machdep.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sys/arm64/arm64/vm_machdep.c b/sys/arm64/arm64/vm_machdep.c index 37fcf0224521..90d628a7d6ee 100644 --- a/sys/arm64/arm64/vm_machdep.c +++ b/sys/arm64/arm64/vm_machdep.c @@ -175,6 +175,7 @@ cpu_copy_thread(struct thread *td, struct thread *td0) td->td_pcb->pcb_x[9] = (uintptr_t)td; td->td_pcb->pcb_lr = (uintptr_t)fork_trampoline; td->td_pcb->pcb_sp = (uintptr_t)td->td_frame; + td->td_pcb->pcb_fpflags &= ~(PCB_FP_STARTED | PCB_FP_KERN | PCB_FP_NOSAVE); td->td_pcb->pcb_fpusaved = &td->td_pcb->pcb_fpustate; td->td_pcb->pcb_vfpcpu = UINT_MAX;
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?202101191906.10JJ6liW082938>