diff options
Diffstat (limited to 'sys/kern/kern_fork.c')
| -rw-r--r-- | sys/kern/kern_fork.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/sys/kern/kern_fork.c b/sys/kern/kern_fork.c index da7ca7dad1a8..9fbf60217457 100644 --- a/sys/kern/kern_fork.c +++ b/sys/kern/kern_fork.c @@ -118,7 +118,7 @@ fork(td, uap) struct proc *p2; mtx_lock(&Giant); - error = fork1(td, RFFDG | RFPROC, &p2); + error = fork1(td, RFFDG | RFPROC, 0, &p2); if (error == 0) { td->td_retval[0] = p2->p_pid; td->td_retval[1] = 0; @@ -140,7 +140,7 @@ vfork(td, uap) struct proc *p2; mtx_lock(&Giant); - error = fork1(td, RFFDG | RFPROC | RFPPWAIT | RFMEM, &p2); + error = fork1(td, RFFDG | RFPROC | RFPPWAIT | RFMEM, 0, &p2); if (error == 0) { td->td_retval[0] = p2->p_pid; td->td_retval[1] = 0; @@ -164,7 +164,7 @@ rfork(td, uap) if ((uap->flags & RFKERNELONLY) != 0) return (EINVAL); mtx_lock(&Giant); - error = fork1(td, uap->flags, &p2); + error = fork1(td, uap->flags, 0, &p2); if (error == 0) { td->td_retval[0] = p2 ? p2->p_pid : 0; td->td_retval[1] = 0; @@ -215,9 +215,10 @@ SYSCTL_PROC(_kern, OID_AUTO, randompid, CTLTYPE_INT|CTLFLAG_RW, 0, 0, sysctl_kern_randompid, "I", "Random PID modulus"); int -fork1(td, flags, procp) +fork1(td, flags, pages, procp) struct thread *td; /* parent proc */ int flags; + int pages; struct proc **procp; /* child proc */ { struct proc *p2, *pptr; @@ -471,6 +472,10 @@ again: kg2 = FIRST_KSEGRP_IN_PROC(p2); ke2 = FIRST_KSE_IN_KSEGRP(kg2); + /* Allocate and switch to an alternate kstack if specified */ + if (pages != 0) + pmap_new_altkstack(td2, pages); + #define RANGEOF(type, start, end) (offsetof(type, end) - offsetof(type, start)) bzero(&p2->p_startzero, |