diff options
| author | Mitchell Horne <mhorne@FreeBSD.org> | 2021-04-07 19:23:46 +0000 |
|---|---|---|
| committer | Mitchell Horne <mhorne@FreeBSD.org> | 2021-04-16 13:47:32 +0000 |
| commit | 17b0a38d96feb77d4b019ab9108b2c5050273823 (patch) | |
| tree | 3d953357c18a3b7dfbfc56c68e7bef819d1bd56e | |
| parent | 02816ecfb93542705e73c108d4d8214450529059 (diff) | |
| download | src-17b0a38d96feb77d4b019ab9108b2c5050273823.tar.gz src-17b0a38d96feb77d4b019ab9108b2c5050273823.zip | |
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)
| -rw-r--r-- | sys/arm64/arm64/vm_machdep.c | 3 |
1 files changed, 3 insertions, 0 deletions
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; |