Enable meta-based validation for shared libraries.

src/trusted/sel_universal/reverse_emulate.cc

Index: src/trusted/sel_universal/reverse_emulate.cc
diff --git a/src/trusted/sel_universal/reverse_emulate.cc b/src/trusted/sel_universal/reverse_emulate.cc
index cccf29570179f6f9c2049937bdbe78977afd0009..ad20da94d483eeaea7a328eb9cb61c195798b56b 100644
--- a/src/trusted/sel_universal/reverse_emulate.cc
+++ b/src/trusted/sel_universal/reverse_emulate.cc
@@ -22,6 +22,7 @@
 #include "native_client/src/shared/srpc/nacl_srpc.h"
 #include "native_client/src/trusted/desc/nacl_desc_wrapper.h"
 #include "native_client/src/trusted/nonnacl_util/sel_ldr_launcher.h"
+#include "native_client/src/trusted/reverse_service/nacl_file_info.h"
 #include "native_client/src/trusted/reverse_service/reverse_service.h"
 #include "native_client/src/trusted/sel_universal/rpc_universal.h"
 #include "native_client/src/trusted/sel_universal/srpc_helper.h"
@@ -41,7 +42,8 @@ class ReverseEmulate : public nacl::ReverseInterface {
 
   // Name service use.
   virtual bool EnumerateManifestKeys(std::set<nacl::string>* keys);
-  virtual bool OpenManifestEntry(nacl::string url_key, int32_t* out_desc);
+  virtual bool OpenManifestEntry(nacl::string url_key,
+                                 struct NaClFileInfo* info);
   virtual bool CloseManifestEntry(int32_t desc);
   virtual void ReportCrash();
 
@@ -240,10 +242,10 @@ bool ReverseEmulate::EnumerateManifestKeys(std::set<nacl::string>* keys) {
 }
 
 bool ReverseEmulate::OpenManifestEntry(nacl::string url_key,
-                                       int32_t* out_desc) {
+                                       struct NaClFileInfo* info) {
   NaClLog(1, "ReverseEmulate::OpenManifestEntry (url_key=%s)\n",
           url_key.c_str());
-  *out_desc = -1;
+  info->desc = -1;
   // Find the pathname for the key.
   if (g_key_to_file.find(url_key) == g_key_to_file.end()) {
     NaClLog(1, "ReverseEmulate::OpenManifestEntry: no pathname for key.\n");
@@ -252,8 +254,11 @@ bool ReverseEmulate::OpenManifestEntry(nacl::string url_key,
   nacl::string pathname = g_key_to_file[url_key];
   NaClLog(1, "ReverseEmulate::OpenManifestEntry: pathname is %s.\n",
           pathname.c_str());
-  *out_desc = OPEN(pathname.c_str(), O_RDONLY);
-  return *out_desc >= 0;
+  // TODO(ncbray): provide more information so that fast validation caching and
+  // mmaping can be enabled.
+  info->desc = OPEN(pathname.c_str(), O_RDONLY);
+  info->nonce = 0;
+  return info->desc >= 0;
 }
 
 bool ReverseEmulate::CloseManifestEntry(int32_t desc) {