xnu-517.9.5.tar.gz

[apple/xnu.git] / bsd / kern / bsd_stubs.c

diff --git a/bsd/kern/bsd_stubs.c b/bsd/kern/bsd_stubs.c
index 1952e98cc88daea38d040c21396174f7ef4bf629..0597434fa0e61ebbae62abf1cfc4a49ec6611ea9 100644 (file)
--- a/bsd/kern/bsd_stubs.c
+++ b/bsd/kern/bsd_stubs.c
@@ -29,6 +29,7 @@
 #include <sys/systm.h>
 #include <sys/conf.h>
 #include <sys/buf.h>   /* for SET */
+#include <sys/user.h>
 
 /* Just to satisfy pstat command */
 int     dmmin, dmmax, dmtext;
@@ -39,23 +40,37 @@ kmem_mb_alloc(vm_map_t  mbmap, int size)
        if (kernel_memory_allocate(mbmap, &addr, size,
                0,
                KMA_NOPAGEWAIT|KMA_KOBJECT) == KERN_SUCCESS)
-                                return((void *)addr);
+                       return(addr);
        else
                return(0);
                
 }
 
 pcb_synch() {}
-unix_master() {}
-unix_release() {}
 
 struct proc *
 current_proc(void)
 {
        /* Never returns a NULL */
-       struct proc *p = (struct proc *)get_bsdtask_info(current_task());
+       struct uthread * ut;
+       struct proc *p; 
+       thread_act_t thr_act = current_act();
+
+       ut = (struct uthread *)get_bsdthread_info(thr_act); 
+       if (ut &&  (ut->uu_flag & P_VFORK) && ut->uu_proc) {
+               p = ut->uu_proc;
+               if ((p->p_flag & P_INVFORK) == 0) 
+                       panic("returning child proc not under vfork");
+               if (p->p_vforkact != (void *)thr_act) 
+                       panic("returning child proc which is not cur_act");
+               return(p);
+       }
+
+       p = (struct proc *)get_bsdtask_info(current_task());
+
        if (p == NULL)
-               p = kernproc;
+               return (kernproc);
+
        return (p);
 }
 
@@ -83,6 +98,9 @@ bdevsw_isfree(int index)
                            sizeof(struct bdevsw)) == 0)
                    break;
            }
+       } else {
+               /* NB: Not used below unless index is in range */
+               devsw = &bdevsw[index];
        }
 
        if ((index < 0) || (index >= nblkdev) ||
@@ -105,8 +123,9 @@ bdevsw_add(int index, struct bdevsw * bsw)
        struct bdevsw *devsw;
 
        if (index == -1) {
-           devsw = bdevsw;
-           for(index=0; index < nblkdev; index++, devsw++) {
+           devsw = &bdevsw[1];         /* Start at slot 1 - this is a hack to fix the index=1 hack */
+           /* yes, start at 1 to avoid collision with volfs (Radar 2842228) */
+           for(index=1; index < nblkdev; index++, devsw++) {
                if(memcmp((char *)devsw, 
                            (char *)&nobdev, 
                            sizeof(struct bdevsw)) == 0)
@@ -221,17 +240,28 @@ cdevsw_remove(int index, struct cdevsw * csw)
        return(index);
 }
 
-int
-memcmp(s1, s2, n)
-       register char *s1, *s2;
-       register n;
+static int
+cdev_set_bdev(int cdev, int bdev)
 {
-       while (--n >= 0)
-               if (*s1++ != *s2++)
-                       return (*--s1 - *--s2);
-       return (0);
+       extern int chrtoblk_add(int cdev, int bdev);
+
+       return (chrtoblk_set(cdev, bdev));
 }
-int
+
+int  
+cdevsw_add_with_bdev(int index, struct cdevsw * csw, int bdev)
+{
+       index = cdevsw_add(index, csw);
+       if (index < 0) {
+               return (index);
+       }
+       if (cdev_set_bdev(index, bdev) < 0) {
+               cdevsw_remove(index, csw);
+               return (-1);
+       }
+       return (index);
+}
+
 issingleuser(void)
 {
        char namep[16];