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kern: Add a proc0

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- Provides the thread's proc pointer and with that access to creds

Update #4475
This commit is contained in:
Chris Johns
2021-07-21 13:46:45 +10:00
parent 761fd69393
commit c7427fc154
8 changed files with 168 additions and 30 deletions
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38
rtemsbsd/rtems/rtems-kernel-init.c
View File

@@ -50,6 +50,9 @@
#include <sys/proc.h>
#include <sys/stat.h>
#include <sys/kbio.h>
#include <sys/resourcevar.h>
#include <sys/jail.h>
#include <uuid/uuid.h>
#include <limits.h>
@@ -94,6 +97,7 @@ sbintime_t sbt_timethreshold;
sbintime_t sbt_tickthreshold;
struct bintime tc_tick_bt;
sbintime_t tc_tick_sbt;
int maxproc;
int tc_precexp;
static SYSCTL_NODE(_kern, OID_AUTO, smp, CTLFLAG_RD|CTLFLAG_CAPRD, NULL,
@@ -107,6 +111,38 @@ SYSCTL_INT(_kern_smp, OID_AUTO, maxid, CTLFLAG_RD|CTLFLAG_CAPRD,
SYSCTL_INT(_kern_smp, OID_AUTO, maxcpus, CTLFLAG_RD|CTLFLAG_CAPRD,
&maxid_maxcpus, 0, "Max number of CPUs that the system was compiled for.");
/*
* Create a single process. RTEMS is a single address, single process OS.
*/
static void
proc0_init(void* dummy)
{
struct proc *p = &proc0;
struct ucred *newcred;
struct uidinfo tmpuinfo;
uuid_t uuid;
uihashinit();
/* Create the file descriptor table. */
newcred = crget();
newcred->cr_uid = 0;
newcred->cr_ruid = 0;
newcred->cr_ngroups = 1; /* group 0 */
newcred->cr_groups[0] = 0;
newcred->cr_rgid = 0;
tmpuinfo.ui_uid = 1;
curthread->td_ucred = newcred;
newcred->cr_uidinfo = newcred->cr_ruidinfo = &tmpuinfo;
newcred->cr_uidinfo = uifind(0);
newcred->cr_ruidinfo = uifind(0);
p->p_ucred = newcred;
p->p_pid = getpid();
p->p_fd = NULL;
p->p_fdtol = NULL;
uuid_generate(uuid);
uuid_unparse(uuid, prison0.pr_hostuuid);
}
SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL);
rtems_status_code
rtems_bsd_initialize(void)
{
@@ -135,6 +171,8 @@ rtems_bsd_initialize(void)
sbt_tickthreshold = bttosbt(bt_tickthreshold);
maxid_maxcpus = (int) rtems_scheduler_get_processor_maximum();
maxproc = 16;
mkdir("/etc", S_IRWXU | S_IRWXG | S_IRWXO);
sc = rtems_timer_initiate_server(

25
rtemsbsd/rtems/rtems-kernel-thread.c
View File

@@ -90,15 +90,19 @@ struct thread *
rtems_bsd_thread_create(Thread_Control *thread, int wait)
{
struct thread *td = malloc(sizeof(*td), M_TEMP, M_ZERO | wait);
struct sleepqueue *sq = sleepq_alloc();
if (td != NULL && sq != NULL) {
td->td_thread = thread;
td->td_sleepqueue = sq;
} else {
free(td, M_TEMP);
sleepq_free(sq);
td = NULL;
if (td != NULL) {
struct sleepqueue *sq = sleepq_alloc();
if (sq != NULL) {
td->td_proc = &proc0;
td->td_ucred = proc0.p_ucred;
td->td_thread = thread;
td->td_sleepqueue = sq;
crhold(td->td_ucred);
} else {
free(td, M_TEMP);
td = NULL;
}
}
thread->extensions[rtems_bsd_extension_index] = td;
@@ -167,6 +171,7 @@ rtems_bsd_extension_thread_delete(
if (td != NULL) {
seltdfini(td);
sleepq_free(td->td_sleepqueue);
crfree(td->td_ucred);
free(td, M_TEMP);
}
}
@@ -303,7 +308,7 @@ kproc_create(void (*func)(void *), void *arg, struct proc **newpp, int flags, in
va_list ap;
va_start(ap, fmt);
eno = rtems_bsd_thread_start(newpp, func, arg, flags, pages, fmt, ap);
eno = rtems_bsd_thread_start((struct thread**) newpp, func, arg, flags, pages, fmt, ap);
va_end(ap);
return eno;
@@ -331,6 +336,8 @@ kthread_add(void (*func)(void *), void *arg, struct proc *p, struct thread **new
va_list ap;
va_start(ap, fmt);
/* the cast here is a hack but passing a proc as a thread struct is just wrong and I
* have no idea why it is like this */
eno = rtems_bsd_thread_start(newtdp, func, arg, flags, pages, fmt, ap);
va_end(ap);