diff options
| author | bsd <bsd@FreeBSD.org> | 2000-02-20 20:51:23 +0000 |
|---|---|---|
| committer | bsd <bsd@FreeBSD.org> | 2000-02-20 20:51:23 +0000 |
| commit | 85f1c223b39c92c49e8b7c6c7ad39d3e42a27574 (patch) | |
| tree | 24b3d3119a30ef55034eb6483b006f39f272b986 /sys/amd64/amd64/vm_machdep.c | |
| parent | 5e5e3ebba622666325b5191546c69ed7f00a5781 (diff) | |
| download | FreeBSD-src-85f1c223b39c92c49e8b7c6c7ad39d3e42a27574.zip FreeBSD-src-85f1c223b39c92c49e8b7c6c7ad39d3e42a27574.tar.gz | |
Don't forget to reset the hardware debug registers when a process that
was using them exits.
Don't allow a user process to cause the kernel to take a TRCTRAP on a
user space address.
Reviewed by: jlemon, sef
Approved by: jkh
Diffstat (limited to 'sys/amd64/amd64/vm_machdep.c')
| -rw-r--r-- | sys/amd64/amd64/vm_machdep.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/amd64/amd64/vm_machdep.c b/sys/amd64/amd64/vm_machdep.c index d7fa73b1..cdcc278 100644 --- a/sys/amd64/amd64/vm_machdep.c +++ b/sys/amd64/amd64/vm_machdep.c @@ -246,6 +246,13 @@ cpu_exit(p) #ifdef USER_LDT user_ldt_free(pcb); #endif + if (pcb->pcb_flags & PCB_DBREGS) { + /* + * disable all hardware breakpoints + */ + reset_dbregs(); + pcb->pcb_flags &= ~PCB_DBREGS; + } cnt.v_swtch++; cpu_switch(p); panic("cpu_exit"); |
