[Pearcolator-devel] SF.net SVN: pearcolator: [108] src/org/binarytranslator/generic/os/loader/ elf/ELF_Loader.java

[<mic...@us...>]

Revision: 108
          http://svn.sourceforge.net/pearcolator/?rev=108&view=rev
Author:   michael_baer
Date:     2007-05-09 04:23:16 -0700 (Wed, 09 May 2007)

Log Message:
-----------
ELF Loader, version currently debugged

Added Paths:
-----------
    src/org/binarytranslator/generic/os/loader/elf/ELF_Loader.java

Added: src/org/binarytranslator/generic/os/loader/elf/ELF_Loader.java
===================================================================
--- src/org/binarytranslator/generic/os/loader/elf/ELF_Loader.java	                        (rev 0)
+++ src/org/binarytranslator/generic/os/loader/elf/ELF_Loader.java	2007-05-09 11:23:16 UTC (rev 108)
@@ -0,0 +1,110 @@
+package org.binarytranslator.generic.os.loader.elf;
+
+import java.io.IOException;
+
+import org.binarytranslator.arch.arm.os.process.ARM_ProcessSpace;
+import org.binarytranslator.arch.arm.os.process.ARM_Registers;
+import org.binarytranslator.arch.arm.os.process.linux.ARM_LinuxProcessSpace;
+import org.binarytranslator.generic.decoder.Interpreter;
+import org.binarytranslator.generic.os.loader.Loader;
+import org.binarytranslator.generic.os.loader.elf.ELF_File.DynamicSection;
+import org.binarytranslator.generic.os.process.ProcessSpace;
+
+public class ELF_Loader extends Loader {
+  
+  private ELF_File file;
+  private ELF_File loader;
+
+  @Override
+  public ABI getABI() {
+    return file.getHeader().getABI();
+  }
+
+  @Override
+  public ISA getISA() {
+    return file.getHeader().getISA();
+  }
+  
+  public int getProgramHeaderAddress() {
+    return file.getProgramHeaderAddress();
+  }
+  
+  public int getNumberOfProgramSegmentHeaders() {
+    return file.getHeader().getNumberOfProgramSegmentHeaders();
+  }
+  
+  public int getProgramSegmentHeaderSize() {
+    return file.getHeader().getProgramSegmentHeaderSize();
+  }
+  
+  public static boolean conforms(String filename) {
+    return ELF_File.conforms(filename);
+  }
+
+  @Override
+  public ProcessSpace readBinary(String filename) throws IOException {
+    
+    file = new ELF_File(filename);
+    ProcessSpace ps = ProcessSpace.createProcessSpaceFromBinary(this);
+    
+    ELF_File.SegmentHeader[] segments = file.getProgramSegmentHeaders();
+    
+    System.out.println("ELF has segments:");
+    for (ELF_File.SegmentHeader header : segments) {
+      System.out.println(header.toString());
+      header.create(ps);
+    }
+
+    int brk;
+    if (segments.length > 1)
+      brk = segments[1].getEnd();
+    else
+      brk = segments[0].getEnd();
+    
+    if (file.getDynamicSection() != null && file.getHeader().getABI() == ABI.ARM) {
+      
+      ARM_ProcessSpace armps = (ARM_ProcessSpace)ps;
+      
+      //invoke the runtime linker
+      RuntimeLinker ld = new RuntimeLinker(file, ps);
+      ld.link();
+      
+      ps.initialise(this, file.getHeader().getEntryPoint(), brk);
+      int startInstruction = ps.getCurrentInstructionAddress();
+      
+      //call the INITs
+      Interpreter interpreter = ps.createInstructionInterpreter();
+      for (Integer init : ld.initMethods) {
+        int pc = init;
+        
+        ps.setCurrentInstructionAddress(init);
+        armps.registers.set(ARM_Registers.LR, init);
+      
+        while (!ps.finished) {
+  
+          Interpreter.Instruction instruction = interpreter.decode(pc);
+          System.out.println(String.format("[0x%x] %s", pc, instruction.toString()));
+          
+          instruction.execute();
+          pc = instruction.getSuccessor(pc);
+          
+          if (pc == -1)
+            pc = ps.getCurrentInstructionAddress();
+          else
+            ps.setCurrentInstructionAddress(pc);
+          
+          //we're done running the init method
+          if (pc == init)
+            break;
+        }
+      }
+      
+      ld._tmpRestore();
+      ps.setCurrentInstructionAddress(startInstruction);
+    }
+    else
+      ps.initialise(this, file.getHeader().getEntryPoint(), brk);
+    
+    return ps;
+  }
+}


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