sualk / ghidra-blackfin Goto Github PK

Hey sualk! Sorry for using this as a forum for questions, but I couldn't find an email or something like that...

I am analysing firmware from a device that uses a ADSP-BF536 processor, using your plugin. Your dissassembler finds a ton of operations, but the problem is that the control flow doesn't really make sense compared to what I know about the program, and in the decompiler I get a lot of "WARNING: Could not recover jumptable at..."

One thing that could be contributing to the problem is that the firmware file is not able to be loaded as a .ldr file, neither by your extension nor by tool i found that is supposed to be able to read ldr-files. It exists in the device on a flashdrive as a file with the file-extension .BIN, and does not appear to have to correct headers for a .dxe file nor a .ldr file, so it is a mystery to me how the firmware is loaded.

Do you have any ideas of what I could do to get a better result out of ghidra, or any thoughts about what kind of file this might be?

I'm trying to decompile some code for a module with a BF70x DSP. I'm aware that BF52x is what's targetted here, but I'm wondering how much work it would be to support the new DSP type. I don't think even IDA supports this weird chip either. :(

Gradle is unable to build for Ghidra 11.0.3, because the relocate() override in Blackfin_ElfRelocationHandler.java now must have return type RelocationResult instead of void.

Error log:

> Task :compileJava FAILED
/Users/wes/Code/opz-tools/ghidra-blackfin/src/main/java/ghidra/app/util/bin/format/elf/relocation/Blackfin_ElfRelocationHandler.java:13: error: Blackfin_ElfRelocationHandler is not abstract and does not override abstract method relocate(ElfRelocationContext,ElfRelocation,Address) in ElfRelocationHandler
public class Blackfin_ElfRelocationHandler extends ElfRelocationHandler {
       ^
/Users/wes/Code/opz-tools/ghidra-blackfin/src/main/java/ghidra/app/util/bin/format/elf/relocation/Blackfin_ElfRelocationHandler.java:21: error: relocate(ElfRelocationContext,ElfRelocation,Address) in Blackfin_ElfRelocationHandler cannot override relocate(ElfRelocationContext,ElfRelocation,Address) in ElfRelocationHandler
        public void relocate(ElfRelocationContext elfRelocationContext, ElfRelocation relocation, Address relocationAddress)
                    ^
  return type void is not compatible with RelocationResult
/Users/wes/Code/opz-tools/ghidra-blackfin/src/main/java/ghidra/app/util/bin/format/elf/relocation/Blackfin_ElfRelocationHandler.java:20: error: method does not override or implement a method from a supertype
        @Override
        ^

When compiling this plugin with Ghidra Version "10.1-BETA Build PUBLIC 2021-Nov-16 1948 Est", I am getting the below error once trying to import any binary or .elf file:

This somehow does related to the CSPEC file, but looking at other cspec files for other processors, I cannot spot really an issue.

Can you maybe let me know with which Ghidra version you developed/tested this plugin, such that I can downgrade?

Exception reading blackfin:LE:32:default/default(blackfin.cspec): tags within a group must be distinguished by size or type
ghidra.program.model.lang.CompilerSpecNotFoundException: Exception reading blackfin:LE:32:default/default(blackfin.cspec): tags within a group must be distinguished by size or type
at ghidra.program.model.lang.BasicCompilerSpec.(BasicCompilerSpec.java:157)
at ghidra.app.plugin.processors.sleigh.SleighLanguage.getCompilerSpecByID(SleighLanguage.java:1143)
at ghidra.app.util.opinion.BinaryLoader.loadProgram(BinaryLoader.java:278)
at ghidra.app.util.opinion.AbstractProgramLoader.load(AbstractProgramLoader.java:112)
at ghidra.plugin.importer.ImporterUtilities.importSingleFile(ImporterUtilities.java:404)
at ghidra.plugin.importer.ImporterDialog.lambda$okCallback$7(ImporterDialog.java:350)
at ghidra.util.task.TaskBuilder$TaskBuilderTask.run(TaskBuilder.java:306)
at ghidra.util.task.Task.monitoredRun(Task.java:126)
at ghidra.util.task.TaskRunner.lambda$startTaskThread$0(TaskRunner.java:106)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: ghidra.xml.XmlParseException: tags within a group must be distinguished by size or type
at ghidra.program.model.lang.ParamEntry.orderWithinGroup(ParamEntry.java:617)
at ghidra.program.model.lang.ParamListStandardOut.restoreXml(ParamListStandardOut.java:82)
at ghidra.program.model.lang.PrototypeModel.restoreXml(PrototypeModel.java:559)
at ghidra.program.model.lang.BasicCompilerSpec.addPrototypeModel(BasicCompilerSpec.java:1030)
at ghidra.program.model.lang.BasicCompilerSpec.restoreXml(BasicCompilerSpec.java:636)
at ghidra.program.model.lang.BasicCompilerSpec.initialize(BasicCompilerSpec.java:249)
at ghidra.program.model.lang.BasicCompilerSpec.(BasicCompilerSpec.java:135)
... 11 more