elf: Add _dl_audit_pltenter

It consolidates the code required to call la_pltenter audit
callback.

Checked on x86_64-linux-gnu, i686-linux-gnu, and aarch64-linux-gnu.

Reviewed-by: Florian Weimer <fweimer@redhat.com>

1 files changed, 1 insertions, 72 deletions

diff --git a/elf/dl-runtime.c b/elf/dl-runtime.c
index c4413c9165..dfedeaf2dd 100644
--- a/elf/dl-runtime.c
+++ b/elf/dl-runtime.c
@@ -320,78 +320,7 @@ _dl_profile_fixup (
 #ifdef SHARED
   /* Auditing checkpoint: report the PLT entering and allow the
      auditors to change the value.  */
-  if (GLRO(dl_naudit) > 0
-      /* Don't do anything if no auditor wants to intercept this call.  */
-      && (reloc_result->enterexit & LA_SYMB_NOPLTENTER) == 0)
-    {
-      /* Sanity check:  DL_FIXUP_VALUE_CODE_ADDR (value) should have been
-	 initialized earlier in this function or in another thread.  */
-      assert (DL_FIXUP_VALUE_CODE_ADDR (value) != 0);
-      ElfW(Sym) *defsym = ((ElfW(Sym) *) D_PTR (reloc_result->bound,
-						l_info[DT_SYMTAB])
-			   + reloc_result->boundndx);
-
-      /* Set up the sym parameter.  */
-      ElfW(Sym) sym = *defsym;
-      sym.st_value = DL_FIXUP_VALUE_ADDR (value);
-
-      /* Get the symbol name.  */
-      const char *strtab = (const void *) D_PTR (reloc_result->bound,
-						 l_info[DT_STRTAB]);
-      const char *symname = strtab + sym.st_name;
-
-      /* Keep track of overwritten addresses.  */
-      unsigned int flags = reloc_result->flags;
-
-      struct audit_ifaces *afct = GLRO(dl_audit);
-      for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
-	{
-	  if (afct->ARCH_LA_PLTENTER != NULL
-	      && (reloc_result->enterexit
-		  & (LA_SYMB_NOPLTENTER << (2 * (cnt + 1)))) == 0)
-	    {
-	      long int new_framesize = -1;
-	      struct auditstate *l_state = link_map_audit_state (l, cnt);
-	      struct auditstate *bound_state
-		= link_map_audit_state (reloc_result->bound, cnt);
-	      uintptr_t new_value
-		= afct->ARCH_LA_PLTENTER (&sym, reloc_result->boundndx,
-					  &l_state->cookie,
-					  &bound_state->cookie,
-					  regs, &flags, symname,
-					  &new_framesize);
-	      if (new_value != (uintptr_t) sym.st_value)
-		{
-		  flags |= LA_SYMB_ALTVALUE;
-		  sym.st_value = new_value;
-		}
-
-	      /* Remember the results for every audit library and
-		 store a summary in the first two bits.  */
-	      reloc_result->enterexit
-		|= ((flags & (LA_SYMB_NOPLTENTER | LA_SYMB_NOPLTEXIT))
-		    << (2 * (cnt + 1)));
-
-	      if ((reloc_result->enterexit & (LA_SYMB_NOPLTEXIT
-					      << (2 * (cnt + 1))))
-		  == 0 && new_framesize != -1 && framesize != -2)
-		{
-		  /* If this is the first call providing information,
-		     use it.  */
-		  if (framesize == -1)
-		    framesize = new_framesize;
-		  /* If two pltenter calls provide conflicting information,
-		     use the larger value.  */
-		  else if (new_framesize != framesize)
-		    framesize = MAX (new_framesize, framesize);
-		}
-	    }
-
-	  afct = afct->next;
-	}
-
-      value = DL_FIXUP_ADDR_VALUE (sym.st_value);
-    }
+  _dl_audit_pltenter (l, reloc_result, &value, regs, &framesize);
 #endif
 
   /* Store the frame size information.  */