Merge pull request nygard#42 from 0xced/fix-section-offset

Fix invalid section offsets
CrazyBWT · Mar 28, 2014 · 71b7518 · 71b7518
2 parents 3ef4b07 + 055f8b8
commit 71b7518
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/Source/CDSection.m b/Source/CDSection.m
@@ -29,6 +29,11 @@ - (id)initWithDataCursor:(CDMachOFileDataCursor *)cursor segment:(CDLCSegment *)
         _section.addr      = [cursor readPtr];
         _section.size      = [cursor readPtr];
         _section.offset    = [cursor readInt32];
+        uint32_t dyldOffset = (uint32_t)(_section.addr - segment.vmaddr + segment.fileoff);
+        if (_section.offset > 0 && _section.offset != dyldOffset) {
+            fprintf(stderr, "Warning: Invalid section offset 0x%08x replaced with 0x%08x in %s,%s\n", _section.offset, dyldOffset, [_segmentName UTF8String], [_sectionName UTF8String]);
+            _section.offset = dyldOffset;
+        }
         _section.align     = [cursor readInt32];
         _section.reloff    = [cursor readInt32];
         _section.nreloc    = [cursor readInt32];