xnu-7195.60.75.tar.gz

[apple/xnu.git] / bsd / sys / event.h

diff --git a/bsd/sys/event.h b/bsd/sys/event.h
index 6303c491579245ba94a6d1ead9450d7eb762754f..cd76a05280eee32b1f3093b957297d7ff58de81c 100644 (file)
--- a/bsd/sys/event.h
+++ b/bsd/sys/event.h
@@ -465,7 +465,7 @@ enum {
 #define NOTE_EXEC               0x20000000      /* process exec'd */
 #define NOTE_REAP               ((unsigned int)eNoteReapDeprecated /* 0x10000000 */ )   /* process reaped */
 #define NOTE_SIGNAL             0x08000000      /* shared with EVFILT_SIGNAL */
-#define NOTE_EXITSTATUS         0x04000000      /* exit status to be returned, valid for child process only */
+#define NOTE_EXITSTATUS         0x04000000      /* exit status to be returned, valid for child process or when allowed to signal target pid */
 #define NOTE_EXIT_DETAIL        0x02000000      /* provide details on reasons for exit */
 
 #define NOTE_PDATAMASK  0x000fffff              /* mask for signal & exit status */
@@ -670,6 +670,7 @@ SLIST_HEAD(klist, knote);
 
 #ifdef XNU_KERNEL_PRIVATE
 #include <sys/queue.h>
+#include <mach/vm_param.h>
 #include <kern/kern_types.h>
 #include <sys/fcntl.h> /* FREAD, FWRITE */
 #include <kern/debug.h> /* panic */
@@ -701,9 +702,18 @@ __options_decl(kn_status_t, uint16_t /* 12 bits really */, {
        KN_SUPPRESSED     = 0x800,  /* event is suppressed during delivery */
 });
 
-#define KNOTE_KQ_BITSIZE    42
-_Static_assert(KNOTE_KQ_BITSIZE > VM_KERNEL_POINTER_SIGNIFICANT_BITS,
-    "Make sure sign extending kn_kq_packed is legit");
+#if __LP64__
+#define KNOTE_KQ_PACKED_BITS   42
+#define KNOTE_KQ_PACKED_SHIFT   0
+#define KNOTE_KQ_PACKED_BASE    0
+#else
+#define KNOTE_KQ_PACKED_BITS   32
+#define KNOTE_KQ_PACKED_SHIFT   0
+#define KNOTE_KQ_PACKED_BASE    0
+#endif
+
+_Static_assert(!VM_PACKING_IS_BASE_RELATIVE(KNOTE_KQ_PACKED),
+    "Make sure the knote pointer packing is based on arithmetic shifts");
 
 struct kqueue;
 struct knote {
@@ -719,9 +729,9 @@ struct knote {
            kn_vnode_kqok:1,
            kn_vnode_use_ofst:1;
 #if __LP64__
-       intptr_t                    kn_kq_packed : KNOTE_KQ_BITSIZE;
+       uintptr_t                   kn_kq_packed : KNOTE_KQ_PACKED_BITS;
 #else
-       intptr_t                    kn_kq_packed;
+       uintptr_t                   kn_kq_packed;
 #endif
 
        /* per filter stash of data (pointer, uint32_t or uint64_t) */
@@ -795,7 +805,7 @@ struct knote {
 static inline struct kqueue *
 knote_get_kq(struct knote *kn)
 {
-       return (struct kqueue *)kn->kn_kq_packed;
+       return (struct kqueue *)VM_UNPACK_POINTER(kn->kn_kq_packed, KNOTE_KQ_PACKED);
 }
 
 static inline int
@@ -1125,7 +1135,7 @@ extern const struct filterops *knote_fops(struct knote *kn);
 extern struct turnstile *kqueue_turnstile(struct kqueue *);
 extern struct turnstile *kqueue_alloc_turnstile(struct kqueue *);
 
-int kevent_proc_copy_uptrs(void *proc, uint64_t *buf, int bufsize);
+int kevent_proc_copy_uptrs(void *proc, uint64_t *buf, uint32_t bufsize);
 int kevent_copyout_proc_dynkqids(void *proc, user_addr_t ubuf,
     uint32_t ubufsize, int32_t *nkqueues_out);
 int kevent_copyout_dynkqinfo(void *proc, kqueue_id_t kq_id, user_addr_t ubuf,