Fixed a few things to make this work on linux

trailofbits · Jan 23, 2014 · 48b799b · 48b799b
1 parent bbef7d3
commit 48b799b
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Showing 2 changed files with 12 additions and 7 deletions.
diff --git a/examples/example_elf.rb b/examples/example_elf.rb
@@ -7,14 +7,19 @@
 
 bisc = BISC::ELFAssembler.new(ARGV)
 
-pVar = bisc.allocate(4)
-free = bisc.get_iat_pointer('free')
+lpVar = bisc.allocate(4)
+lppExit = bisc.get_iat_pointer('exit')
 
+NOPS = [ "NOP" ] * 500
 Main = [
-  pVar,
-  free,
-  "NOP",
+  "POP ECX", lpVar,
+  "POP EAX", 0x01,
+  "MOV [ECX], EAX",
+  "POP ECX", lppExit,
+  "MOV EAX, [ECX]",
+  "PUSH EAX", "NOP", 0x02,
+  "NOP", "NOP"
 ]
 
-print bisc.assemble(Main)
+print bisc.assemble(NOPS + Main)
 
diff --git a/lib/bisc/elf_assembler.rb b/lib/bisc/elf_assembler.rb
@@ -32,7 +32,7 @@ def add_module(path)
           hits = scanner.scan_segment(header)
 
           hits.each do |hit|
-            address = elf.elf.rva_to_offset(hit[0])
+            address = hit[0]
             bytes = hit[1][0]
             matchdata = re.match([bytes].pack('H*'))