Provide elf_brand_inuse() as a method an emulator can use to find out

whether it is currently in use (which is kinda useful when it's about
to unload itself:  Lockups are never very much fun, are they?).

2 files changed, 16 insertions, 2 deletions

diff --git a/sys/kern/imgact_elf.c b/sys/kern/imgact_elf.c
index 98613d8..4bc0fac 100644
--- a/sys/kern/imgact_elf.c
+++ b/sys/kern/imgact_elf.c
@@ -26,7 +26,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- *	$Id: imgact_elf.c,v 1.46 1999/01/27 21:49:55 dillon Exp $
+ *	$Id: imgact_elf.c,v 1.47 1999/01/29 22:59:43 dillon Exp $
  */
 
 #include "opt_rlimit.h"
@@ -145,6 +145,19 @@ elf_remove_brand_entry(Elf_Brandinfo *entry)
 	return 0;
 }
 
+int
+elf_brand_inuse(Elf_Brandinfo *entry)
+{
+	struct proc *p;
+
+	for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
+		if (p->p_sysent == entry->sysvec)
+			return TRUE;
+	}
+
+	return FALSE;
+}
+
 static int
 elf_check_header(const Elf_Ehdr *hdr, int type)
 {
diff --git a/sys/sys/imgact_elf.h b/sys/sys/imgact_elf.h
index d841a39..e7985ce 100644
--- a/sys/sys/imgact_elf.h
+++ b/sys/sys/imgact_elf.h
@@ -25,7 +25,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- *	$Id: imgact_elf.h,v 1.9 1998/09/14 05:36:51 jdp Exp $
+ *	$Id: imgact_elf.h,v 1.10 1999/01/01 14:30:11 bde Exp $
  */
 
 #ifndef _SYS_IMGACT_ELF_H_
@@ -66,6 +66,7 @@ typedef struct {
 
 int	elf_insert_brand_entry __P((Elf32_Brandinfo *entry));
 int	elf_remove_brand_entry __P((Elf32_Brandinfo *entry));
+int	elf_brand_inuse        __P((Elf32_Brandinfo *entry));
 
 #else /* !(ELF_TARG_CLASS == ELFCLASS32) */