From fb5ec079ba1fe1637ca3911bb58e5938c14c3f0d Mon Sep 17 00:00:00 2001
From: Martin Bickel <martin.bickel@continental-corporation.com>
Date: Wed, 28 Dec 2016 18:28:35 +0100
Subject: [PATCH] new method for validating the loaded ELF file
---
elfio/elfio.hpp | 39 +++++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/elfio/elfio.hpp b/elfio/elfio.hpp
index b7a3cf9..468140f 100644
--- a/elfio/elfio.hpp
+++ b/elfio/elfio.hpp
@@ -246,6 +246,45 @@ class elfio
}
}
+//------------------------------------------------------------------------------
+ private:
+ bool is_offset_in_section( Elf64_Off offset, const section* sec ) const {
+ return offset >= sec->get_offset() && offset < sec->get_offset()+sec->get_size();
+ }
+
+//------------------------------------------------------------------------------
+ public:
+
+ //! returns an empty string if no problems are detected,
+ //! or a string containing an error message if problems are found
+ std::string validate() const {
+
+ // check for overlapping sections in the file
+ for ( int i = 0; i < sections.size(); ++i) {
+ for ( int j = i+1; j < sections.size(); ++j ) {
+ const section* a = sections[i];
+ const section* b = sections[j];
+ if ( !(a->get_type() & SHT_NOBITS)
+ && !(b->get_type() & SHT_NOBITS)
+ && (a->get_size() > 0)
+ && (b->get_size() > 0)
+ && (a->get_offset() > 0)
+ && (b->get_offset() > 0)) {
+ if ( is_offset_in_section( a->get_offset(), b )
+ || is_offset_in_section( a->get_offset()+a->get_size()-1, b )
+ || is_offset_in_section( b->get_offset(), a )
+ || is_offset_in_section( b->get_offset()+b->get_size()-1, a )) {
+ return "Sections " + a->get_name() + " and " + b->get_name() + " overlap in file";
+ }
+ }
+ }
+ }
+
+ // more checks to be added here...
+
+ return "";
+ }
+
//------------------------------------------------------------------------------
private:
//------------------------------------------------------------------------------
--
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