/*
* Prepare new lwp to return to the address specified in params.
*/
int
cpu_prepare_lwp(struct lwp *lp, struct lwp_params *params)
{
struct trapframe *regs = lp->lwp_md.md_regs;
void *bad_return = NULL;
int error;
regs->tf_eip = (int)params->func;
regs->tf_esp = (int)params->stack;
/* Set up argument for function call */
regs->tf_esp -= sizeof(params->arg);
error =
copyout(¶ms->arg, (void *)regs->tf_esp, sizeof(params->arg));
if (error)
return (error);
/*
* Set up fake return address. As the lwp function may never return,
* we simply copy out a NULL pointer and force the lwp to receive
* a SIGSEGV if it returns anyways.
*/
regs->tf_esp -= sizeof(void *);
error = copyout(&bad_return, (void *)regs->tf_esp, sizeof(bad_return));
if (error)
return (error);
cpu_set_fork_handler(lp,
(void (*)(void *, struct trapframe *))generic_lwp_return, lp);
return (0);
}
void
cpu_set_upcall(struct thread *td, struct thread *td0)
{
struct pcb *pcb;
struct trapframe *tf;
ia64_highfp_save(td0);
tf = td->td_frame;
KASSERT(tf != NULL, ("foo"));
bcopy(td0->td_frame, tf, sizeof(*tf));
tf->tf_length = sizeof(struct trapframe);
tf->tf_flags = FRAME_SYSCALL;
tf->tf_special.ndirty = 0;
tf->tf_special.bspstore &= ~0x1ffUL;
tf->tf_scratch.gr8 = 0;
tf->tf_scratch.gr9 = 1;
tf->tf_scratch.gr10 = 0;
pcb = td->td_pcb;
KASSERT(pcb != NULL, ("foo"));
bcopy(td0->td_pcb, pcb, sizeof(*pcb));
pcb->pcb_special.bspstore = td->td_kstack;
pcb->pcb_special.pfs = 0;
pcb->pcb_current_pmap = vmspace_pmap(td->td_proc->p_vmspace);
pcb->pcb_special.sp = (uintptr_t)tf - 16;
pcb->pcb_special.rp = FDESC_FUNC(fork_trampoline);
cpu_set_fork_handler(td, (void (*)(void*))fork_return, td);
/* Setup to release the spin count in fork_exit(). */
td->td_md.md_spinlock_count = 1;
td->td_md.md_saved_intr = 1;
}
/*
* Create a kernel process/thread/whatever. It shares it's address space
* with proc0 - ie: kernel only.
*/
int
kthread_create2(void (*func)(void *), void *arg,
struct proc **newpp, int flags, const char *fmt, ...)
{
int error;
va_list ap;
struct proc *p2;
if (!proc0.p_stats || proc0.p_stats->p_start.tv_sec == 0) {
panic("kthread_create called too soon");
}
error = fork1(&proc0, RFMEM | RFFDG | RFPROC | flags, &p2);
if (error)
return error;
/* save a global descriptor, if desired */
if (newpp != NULL)
*newpp = p2;
/* this is a non-swapped system process */
p2->p_flag |= P_INMEM | P_SYSTEM;
p2->p_procsig->ps_flag |= PS_NOCLDWAIT;
PHOLD(p2);
/* set up arg0 for 'ps', et al */
va_start(ap, fmt);
vsnprintf(p2->p_comm, sizeof(p2->p_comm), fmt, ap);
va_end(ap);
/* call the processes' main()... */
cpu_set_fork_handler(p2, func, arg);
return 0;
}
/*
* Create a kernel process/thread/whatever. It shares it's address space
* with proc0 - ie: kernel only.
*
* XXX only the SMB protocol uses this, we should convert this mess to a
* pure thread when possible.
*/
int
smb_kthread_create(void (*func)(void *), void *arg,
struct proc **newpp, int flags, const char *fmt, ...)
{
int error;
__va_list ap;
struct proc *p2;
struct lwp *lp2;
error = fork1(&lwp0, RFMEM | RFFDG | RFPROC | flags, &p2);
if (error)
return error;
/* save a global descriptor, if desired */
if (newpp != NULL)
*newpp = p2;
/* this is a non-swapped system process */
p2->p_flags |= P_SYSTEM;
p2->p_sigacts->ps_flag |= PS_NOCLDWAIT;
lp2 = ONLY_LWP_IN_PROC(p2);
/* set up arg0 for 'ps', et al */
__va_start(ap, fmt);
kvsnprintf(p2->p_comm, sizeof(p2->p_comm), fmt, ap);
__va_end(ap);
lp2->lwp_thread->td_ucred = crhold(proc0.p_ucred);
/* call the processes' main()... */
cpu_set_fork_handler(lp2,
(void (*)(void *, struct trapframe *))func, arg);
start_forked_proc(&lwp0, p2);
return 0;
}
static void
linker_file_sysinit(linker_file_t lf)
{
struct linker_set* sysinits;
struct sysinit** sipp;
struct sysinit** xipp;
struct sysinit* save;
moduledata_t *moddata;
KLD_DPF(FILE, ("linker_file_sysinit: calling SYSINITs for %s\n",
lf->filename));
sysinits = (struct linker_set*)
linker_file_lookup_symbol(lf, "sysinit_set", 0);
KLD_DPF(FILE, ("linker_file_sysinit: SYSINITs %p\n", sysinits));
if (!sysinits)
return;
/* HACK ALERT! */
for (sipp = (struct sysinit **)sysinits->ls_items; *sipp; sipp++) {
if ((*sipp)->func == module_register_init) {
moddata = (*sipp)->udata;
moddata->_file = lf;
}
}
/*
* Perform a bubble sort of the system initialization objects by
* their subsystem (primary key) and order (secondary key).
*
* Since some things care about execution order, this is the
* operation which ensures continued function.
*/
for (sipp = (struct sysinit **)sysinits->ls_items; *sipp; sipp++) {
for (xipp = sipp + 1; *xipp; xipp++) {
if ((*sipp)->subsystem <= (*xipp)->subsystem ||
((*sipp)->subsystem == (*xipp)->subsystem &&
(*sipp)->order <= (*xipp)->order))
continue; /* skip*/
save = *sipp;
*sipp = *xipp;
*xipp = save;
}
}
/*
* Traverse the (now) ordered list of system initialization tasks.
* Perform each task, and continue on to the next task.
*/
for (sipp = (struct sysinit **)sysinits->ls_items; *sipp; sipp++) {
if ((*sipp)->subsystem == SI_SUB_DUMMY)
continue; /* skip dummy task(s)*/
switch ((*sipp)->type) {
case SI_TYPE_DEFAULT:
/* no special processing*/
(*((*sipp)->func))((*sipp)->udata);
break;
case SI_TYPE_KTHREAD:
#if !defined(SMP)
/* kernel thread*/
if (fork1(&proc0, RFFDG|RFPROC|RFMEM))
panic("fork kernel thread");
cpu_set_fork_handler(pfind(proc0.p_retval[0]),
(*sipp)->func, (*sipp)->udata);
break;
#endif
case SI_TYPE_KPROCESS:
/* kernel thread*/
if (fork1(&proc0, RFFDG|RFPROC))
panic("fork kernel process");
cpu_set_fork_handler(pfind(proc0.p_retval[0]),
(*sipp)->func, (*sipp)->udata);
break;
default:
panic ("linker_file_sysinit: unrecognized init type");
}
}
}
/*
* Create a kernel process/thread/whatever. It shares its address space
* with proc0 - ie: kernel only.
*
* func is the function to start.
* arg is the parameter to pass to function on first startup.
* newpp is the return value pointing to the thread's struct proc.
* flags are flags to fork1 (in unistd.h)
* fmt and following will be *printf'd into (*newpp)->p_comm (for ps, etc.).
*/
int
kproc_create(void (*func)(void *), void *arg,
struct proc **newpp, int flags, int pages, const char *fmt, ...)
{
struct fork_req fr;
int error;
va_list ap;
struct thread *td;
struct proc *p2;
if (!proc0.p_stats)
panic("kproc_create called too soon");
bzero(&fr, sizeof(fr));
fr.fr_flags = RFMEM | RFFDG | RFPROC | RFSTOPPED | flags;
fr.fr_pages = pages;
fr.fr_procp = &p2;
error = fork1(&thread0, &fr);
if (error)
return error;
/* save a global descriptor, if desired */
if (newpp != NULL)
*newpp = p2;
/* this is a non-swapped system process */
PROC_LOCK(p2);
td = FIRST_THREAD_IN_PROC(p2);
p2->p_flag |= P_SYSTEM | P_KTHREAD;
td->td_pflags |= TDP_KTHREAD;
mtx_lock(&p2->p_sigacts->ps_mtx);
p2->p_sigacts->ps_flag |= PS_NOCLDWAIT;
mtx_unlock(&p2->p_sigacts->ps_mtx);
PROC_UNLOCK(p2);
/* set up arg0 for 'ps', et al */
va_start(ap, fmt);
vsnprintf(p2->p_comm, sizeof(p2->p_comm), fmt, ap);
va_end(ap);
/* set up arg0 for 'ps', et al */
va_start(ap, fmt);
vsnprintf(td->td_name, sizeof(td->td_name), fmt, ap);
va_end(ap);
#ifdef KTR
sched_clear_tdname(td);
#endif
/* call the processes' main()... */
cpu_set_fork_handler(td, func, arg);
/* Avoid inheriting affinity from a random parent. */
cpuset_setthread(td->td_tid, cpuset_root);
thread_lock(td);
TD_SET_CAN_RUN(td);
sched_prio(td, PVM);
sched_user_prio(td, PUSER);
/* Delay putting it on the run queue until now. */
if (!(flags & RFSTOPPED))
sched_add(td, SRQ_BORING);
thread_unlock(td);
return 0;
}
/*
* Create a kernel thread. It shares its address space
* with proc0 - ie: kernel only.
*
* func is the function to start.
* arg is the parameter to pass to function on first startup.
* newtdp is the return value pointing to the thread's struct thread.
* ** XXX fix this --> flags are flags to fork1 (in unistd.h)
* fmt and following will be *printf'd into (*newtd)->td_name (for ps, etc.).
*/
int
kthread_add(void (*func)(void *), void *arg, struct proc *p,
struct thread **newtdp, int flags, int pages, const char *fmt, ...)
{
va_list ap;
struct thread *newtd, *oldtd;
if (!proc0.p_stats)
panic("kthread_add called too soon");
/* If no process supplied, put it on proc0 */
if (p == NULL)
p = &proc0;
/* Initialize our new td */
newtd = thread_alloc(pages);
if (newtd == NULL)
return (ENOMEM);
PROC_LOCK(p);
oldtd = FIRST_THREAD_IN_PROC(p);
bzero(&newtd->td_startzero,
__rangeof(struct thread, td_startzero, td_endzero));
bcopy(&oldtd->td_startcopy, &newtd->td_startcopy,
__rangeof(struct thread, td_startcopy, td_endcopy));
/* set up arg0 for 'ps', et al */
va_start(ap, fmt);
vsnprintf(newtd->td_name, sizeof(newtd->td_name), fmt, ap);
va_end(ap);
newtd->td_proc = p; /* needed for cpu_set_upcall */
/* XXX optimise this probably? */
/* On x86 (and probably the others too) it is way too full of junk */
/* Needs a better name */
cpu_set_upcall(newtd, oldtd);
/* put the designated function(arg) as the resume context */
cpu_set_fork_handler(newtd, func, arg);
newtd->td_pflags |= TDP_KTHREAD;
thread_cow_get_proc(newtd, p);
/* this code almost the same as create_thread() in kern_thr.c */
p->p_flag |= P_HADTHREADS;
thread_link(newtd, p);
thread_lock(oldtd);
/* let the scheduler know about these things. */
sched_fork_thread(oldtd, newtd);
TD_SET_CAN_RUN(newtd);
thread_unlock(oldtd);
PROC_UNLOCK(p);
tidhash_add(newtd);
/* Avoid inheriting affinity from a random parent. */
cpuset_setthread(newtd->td_tid, cpuset_root);
/* Delay putting it on the run queue until now. */
if (!(flags & RFSTOPPED)) {
thread_lock(newtd);
sched_add(newtd, SRQ_BORING);
thread_unlock(newtd);
}
if (newtdp)
*newtdp = newtd;
return 0;
}
