MFC r276627:

Add rtld private interface for dso to detect dynamic loading
vs. static linking.

1 files changed, 22 insertions, 0 deletions

diff --git a/libexec/rtld-elf/rtld.c b/libexec/rtld-elf/rtld.c
index 9398209..9d6087e 100644
--- a/libexec/rtld-elf/rtld.c
+++ b/libexec/rtld-elf/rtld.c
@@ -2149,6 +2149,7 @@ do_load_object(int fd, const char *name, char *path, struct stat *sbp,
 	return (NULL);
     }
 
+    obj->dlopened = (flags & RTLD_LO_DLOPEN) != 0;
     *obj_tail = obj;
     obj_tail = &obj->next;
     obj_count++;
@@ -4752,6 +4753,27 @@ _rtld_get_stack_prot(void)
 	return (stack_prot);
 }
 
+int
+_rtld_is_dlopened(void *arg)
+{
+	Obj_Entry *obj;
+	RtldLockState lockstate;
+	int res;
+
+	rlock_acquire(rtld_bind_lock, &lockstate);
+	obj = dlcheck(arg);
+	if (obj == NULL)
+		obj = obj_from_addr(arg);
+	if (obj == NULL) {
+		_rtld_error("No shared object contains address");
+		lock_release(rtld_bind_lock, &lockstate);
+		return (-1);
+	}
+	res = obj->dlopened ? 1 : 0;
+	lock_release(rtld_bind_lock, &lockstate);
+	return (res);
+}
+
 static void
 map_stacks_exec(RtldLockState *lockstate)
 {