From d800c7b2958616df20fbd0ff29f3648cb1d5e05b Mon Sep 17 00:00:00 2001
From: Martin Bickel <martin.bickel@continental-corporation.com>
Date: Wed, 28 Dec 2016 19:27:30 +0100
Subject: [PATCH] When saving a previously loaded ELF file, don't shrink
segments' memory size
---
elfio/elfio.hpp | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/elfio/elfio.hpp b/elfio/elfio.hpp
index c983a9e..63512b3 100644
--- a/elfio/elfio.hpp
+++ b/elfio/elfio.hpp
@@ -728,7 +728,15 @@ class elfio
}
seg->set_file_size( segment_filesize );
- seg->set_memory_size( segment_memory );
+
+ // If we already have a memory size from loading an elf file (value > 0),
+ // it must not shrink!
+ // Memory size may be bigger than file size and it is the loader's job to do something
+ // with the surplus bytes in memory, like initializing them with a defined value.
+ if ( seg->get_memory_size() < segment_memory ) {
+ seg->set_memory_size( segment_memory );
+ }
+
seg->set_offset(seg_start_pos);
}
--
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