Ticket #13037: patch-src-unexmacosx.c.diff

src/unexmacosx.c

@@ -443 +443 @@
 
   while (num && num_unexec_regions < MAX_UNEXEC_REGIONS)
     {
-      /* Subtract the size of trailing null pages from filesize.  It
+      /* Subtract the size of trailing null bytes from filesize.  It
          can be smaller than vmsize in segment commands.  In such a
-         case, trailing pages are initialized with zeros.  */
-      for (p = ranges->address + ranges->size; p > ranges->address;
-           p -= sizeof (int))
-        if (*(((int *) p)-1))
+         case, trailing bytes are initialized with zeros.  */
+      for (p = ranges->address + ranges->size; p > ranges->address; p--)
+        if (*(((char *) p)-1))
           break;
-      filesize = ROUNDUP_TO_PAGE_BOUNDARY (p - ranges->address);
-      assert (filesize <= ranges->size);
+      filesize = p - ranges->address;
 
       unexec_regions[num_unexec_regions].filesize = filesize;
       unexec_regions[num_unexec_regions++].range = *ranges;
@@ -503 +501 @@
 {
   int i, n;
   unexec_region_info r;
+  vm_size_t padsize;
 
   qsort (unexec_regions, num_unexec_regions, sizeof (unexec_regions[0]),
          &unexec_regions_sort_compare);
   n = 0;
   r = unexec_regions[0];
+  padsize = r.range.address & (pagesize - 1);
+  if (padsize)
+    {
+      r.range.address -= padsize;
+      r.range.size += padsize;
+      r.filesize += padsize;
+    }
   for (i = 1; i < num_unexec_regions; i++)
     {
       if (r.range.address + r.range.size == unexec_regions[i].range.address
@@ -520 +526 @@
         {
           unexec_regions[n++] = r;
           r = unexec_regions[i];
+          padsize = r.range.address & (pagesize - 1);
+          if (padsize)
+            {
+              if ((unexec_regions[n-1].range.address
+                   + unexec_regions[n-1].range.size) == r.range.address)
+                unexec_regions[n-1].range.size -= padsize;
+
+              r.range.address -= padsize;
+              r.range.size += padsize;
+              r.filesize += padsize;
+            }
         }
     }
   unexec_regions[n++] = r;
@@ -562 +579 @@
     case LC_TWOLEVEL_HINTS:
       printf ("LC_TWOLEVEL_HINTS");
       break;
+#ifdef LC_UUID
+    case LC_UUID:
+      printf ("LC_UUID          ");
+      break;
+#endif
     default:
       printf ("unknown          ");
     }