Introduce link_map_audit_state accessor function

To improve GCC 10 compatibility, it is necessary to remove the l_audit
zero-length array from the end of struct link_map.  In preparation of
that, this commit introduces an accessor function for the audit state,
so that it is possible to change the representation of the audit state
without adjusting the code that accesses it.

Tested on x86_64-linux-gnu.  Built on i686-gnu.

Change-Id: Id815673c29950fc011ae5301d7cde12624f658df

1 files changed, 9 insertions, 9 deletions

diff --git a/elf/dl-load.c b/elf/dl-load.c
index c1bc8c26be..6cdd11e6b0 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -973,7 +973,8 @@ _dl_map_object_from_fd (const char *name, const char *origname, int fd,
 	      for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
 		{
 		  if (afct->activity != NULL)
-		    afct->activity (&head->l_audit[cnt].cookie, LA_ACT_ADD);
+		    afct->activity (&link_map_audit_state (head, cnt)->cookie,
+				    LA_ACT_ADD);
 
 		  afct = afct->next;
 		}
@@ -1402,10 +1403,9 @@ cannot enable executable stack as shared object requires");
 	{
 	  if (afct->objopen != NULL)
 	    {
-	      l->l_audit[cnt].bindflags
-		= afct->objopen (l, nsid, &l->l_audit[cnt].cookie);
-
-	      l->l_audit_any_plt |= l->l_audit[cnt].bindflags != 0;
+	      struct auditstate *state = link_map_audit_state (l, cnt);
+	      state->bindflags = afct->objopen (l, nsid, &state->cookie);
+	      l->l_audit_any_plt |= state->bindflags != 0;
 	    }
 
 	  afct = afct->next;
@@ -1511,8 +1511,8 @@ open_verify (const char *name, int fd,
 	{
 	  if (afct->objsearch != NULL)
 	    {
-	      name = afct->objsearch (name, &loader->l_audit[cnt].cookie,
-				      whatcode);
+	      struct auditstate *state = link_map_audit_state (loader, cnt);
+	      name = afct->objsearch (name, &state->cookie, whatcode);
 	      if (name == NULL)
 		/* Ignore the path.  */
 		return -1;
@@ -1970,8 +1970,8 @@ _dl_map_object (struct link_map *loader, const char *name,
 	  if (afct->objsearch != NULL)
 	    {
 	      const char *before = name;
-	      name = afct->objsearch (name, &loader->l_audit[cnt].cookie,
-				      LA_SER_ORIG);
+	      struct auditstate *state = link_map_audit_state (loader, cnt);
+	      name = afct->objsearch (name, &state->cookie, LA_SER_ORIG);
 	      if (name == NULL)
 		{
 		  /* Do not try anything further.  */