Added extensions GnuDisassembler and SleighDevTools

2024-11-21 19:42:14 +00:00 · 2019-06-19 16:17:48 -04:00 · 2019-06-19 16:17:48 -04:00 · a15c70950f
commit a15c70950f
parent cdbe651627
43 changed files with 2349 additions and 22 deletions
--- a/GPL/CabExtract/build.gradle
+++ b/GPL/CabExtract/build.gradle
@ -1,3 +1,5 @@
+apply from: file("../gpl.gradle").getCanonicalPath()
+
 if (findProject(':Generic') != null) {
 	apply from: "$rootProject.projectDir/gradle/nativeProject.gradle"
 	apply from: "$rootProject.projectDir/gradle/distributableGPLModule.gradle"
--- a/GPL/CabExtract/certification.manifest
+++ b/GPL/CabExtract/certification.manifest
@ -4,3 +4,4 @@
 Module.manifest||Public Domain||||END|
 build.gradle||Public Domain||||END|
 data/cabextract-1.6.tar.gz||GPL 3||||END|
+settings.gradle||Public Domain||||END|
--- a/GPL/CabExtract/settings.gradle
+++ b/GPL/CabExtract/settings.gradle
--- a/GPL/DMG/build.gradle
+++ b/GPL/DMG/build.gradle
@ -1,13 +1,13 @@
+apply from: file("../gpl.gradle").getCanonicalPath()
+
 if (findProject(':Generic') != null) {
 	apply from: "$rootProject.projectDir/gradle/javaProject.gradle"
 	apply from: "$rootProject.projectDir/gradle/distributableGPLModule.gradle"
 	
 	rootProject.assembleDistribution {
-		
 		doLast {
 			// eliminate standard module lib directory
 			def assemblePath = destinationDir.path + "/" + getZipPath(this.project)
-			println "DELETE: ${assemblePath}/lib"
 			delete assemblePath + "/lib"
 		}
 	}
@ -28,6 +28,7 @@ eclipse.project.name = 'GPL DMG'
 *
 *********************************************************************************/
 sourceSets {
+	
 	dmg {
 		java {
 			srcDir 'src/dmg/java'
--- a/GPL/DMG/certification.manifest
+++ b/GPL/DMG/certification.manifest
@ -16,3 +16,4 @@ data/os/win64/llio_amd64.dll||GPL 3||||END|
 data/os/win64/llio_i386.dll||GPL 3||||END|
 data/os/win64/llio_ia64.dll||GPL 3||||END|
 data/server_memory.cfg||Public Domain||||END|
+settings.gradle||Public Domain||||END|
--- a/GPL/DMG/settings.gradle
+++ b/GPL/DMG/settings.gradle
--- a/GPL/DemanglerGnu/build.gradle
+++ b/GPL/DemanglerGnu/build.gradle
@ -1,3 +1,4 @@
+apply from: file("../gpl.gradle").getCanonicalPath()

 if (findProject(':Generic') != null) {
 	apply from: "$rootProject.projectDir/gradle/nativeProject.gradle"
--- a/GPL/DemanglerGnu/certification.manifest
+++ b/GPL/DemanglerGnu/certification.manifest
@ -6,4 +6,5 @@
 ##MODULE IP: Public Domain
 Module.manifest||Public Domain||||END|
 build.gradle||Public Domain||||END|
+settings.gradle||Public Domain||||END|
 src/demangler_gnu/README.txt||Public Domain||||END|
--- a/GPL/DemanglerGnu/settings.gradle
+++ b/GPL/DemanglerGnu/settings.gradle
--- a/GPL/GnuDisassembler/Module.manifest
+++ b/GPL/GnuDisassembler/Module.manifest
--- a/GPL/GnuDisassembler/README.txt
+++ b/GPL/GnuDisassembler/README.txt
@ -0,0 +1,20 @@
+The GnuDisassembler extension module must be built using gradle prior to its' use within Ghidra.
+
+This module provides the ability to leverage the binutils disassembler capabilities
+for various processors as a means of verifying Sleigh disassembler output syntax.
+
+To build this extension for Linux or Mac OS X:
+
+	1. If building for an installation of Ghidra, copy the appropriate source distribution of 
+	   binutils into this module's root directory.  If building within a git clone of the full
+	   Ghidra source, copy binutils source distribution file into the ghidra.bin/GPL/GnuDisassembler 
+	   directory.
+	   
+	   The supported version and archive format is identified within the build.gradle file.
+	   If a different binutils distribution is used the build.gradle and/or buildGdis.gradle
+	   may require modification.
+	   
+	2. Run gradle from the module's root directory (see top of build.gradle file for
+	   specific instructions). 
+
+This resulting gdis executable will be located in build/os/<platform>.
--- a/GPL/GnuDisassembler/build.gradle
+++ b/GPL/GnuDisassembler/build.gradle
@ -0,0 +1,69 @@
+// If extension module does not reside within the Ghidra GPL directory, the Ghidra installation directory 
+// must be specified either by setting the GHIDRA_INSTALL_DIR environment variable or Gradle 
+// project property:
+//
+//     > export GHIDRA_INSTALL_DIR=<Absolute path to Ghidra>
+//     > gradle build
+//
+//         or
+//
+//     > gradle -PGHIDRA_INSTALL_DIR=<Absolute path to Ghidra> build
+//
+// In addition, the appropriate binutils source distribution archive must be placed
+// within this module's directory (see below for binutils version and archive file naming.
+//
+// Gradle should be invoked from the directory of the extension module to build.  Please see the
+// application.gradle.version property in <GHIDRA_INSTALL_DIR>/Ghidra/application.properties
+// for the correction version of Gradle to use for the Ghidra installation you specify.
+
+ext.binutils = "binutils-2.29.1"
+ext.binutilsDistro = "${binutils}.tar.bz2"
+
+ext.ghidraInstallDir = null;
+
+if (file("../gpl.gradle").exists()) {
+	// Module is located within the Ghidra GPL directory
+	ext.ghidraInstallDir = file("../..").getCanonicalPath()
+	ext.binutilsLocation = file("${ghidraInstallDir}/../ghidra.bin/GPL/${name}").getCanonicalPath()
+	apply from: file("../gpl.gradle").getCanonicalPath()
+}
+else {
+	// various module placements for Ghidra installations
+	ext.binutilsLocation = projectDir
+	if (file("../../../GPL/gpl.gradle").exists()) {
+		// Handle GPL extension install within Ghidra Extensions directory
+		ext.ghidraInstallDir = file("../../..").getCanonicalPath()
+	}
+	else {
+		// Handle extension install outside of Ghidra installation - must specify Ghidra install path
+		if (System.env.GHIDRA_INSTALL_DIR) {
+			ext.ghidraInstallDir = System.env.GHIDRA_INSTALL_DIR
+		}
+		else if (project.hasProperty("GHIDRA_INSTALL_DIR")) {
+			ext.ghidraInstallDir = project.getProperty("GHIDRA_INSTALL_DIR")
+		}
+	}
+	if (ghidraInstallDir) {
+		if (ghidraInstallDir.replace("\\","/").endsWith("/")) {
+			ext.ghidraInstallDir = ghidraInstallDir.substring(0, ghidraInstallDir.length()-1)
+		}
+		println "Building with Ghidra installation at $ghidraInstallDir"
+		apply from: new File(ghidraInstallDir).getCanonicalPath() + "/GPL/gpl.gradle"
+	}
+	else {
+		throw new GradleException("GHIDRA_INSTALL_DIR is not defined!")
+	}
+}
+
+if (findProject(':Generic') != null) {
+	// Handle integrated Ghidra build - do not build gdis native
+	apply from: "$rootProject.projectDir/gradle/distributableGPLExtension.gradle"
+	delete file("build/os"); // remove any prior build of gdis
+}
+else {
+	apply from: "${ghidraInstallDir}/GPL/nativeBuildProperties.gradle"
+	apply from: "buildGdis.gradle"
+}
+
+apply plugin: 'eclipse'
+eclipse.project.name = 'Xtra GPL GnuDisassembler'
--- a/GPL/GnuDisassembler/buildGdis.gradle
+++ b/GPL/GnuDisassembler/buildGdis.gradle
@ -0,0 +1,169 @@
+/*******************************************************************************************
+ * build.gradle file that applies this script must define two properties
+ *     1) binutilsLocation  - the folder where the original binutils.zip lives
+ *     2) binutilsPrebuiltPath - the folder where the custom prebuilt binutils lives or will be built to
+ *******************************************************************************************/
+
+defaultTasks 'assemble'
+
+ext.supportedPlatforms = ['osx64', 'linux64']
+
+ext.binutilsResource = new File("${binutilsLocation}/${binutils}.tar.bz2")
+
+def binutilsUnpackDir = file("${project.buildDir}/${binutils}/")
+
+/******************************************************************************************
+ *
+ * For each supported platform build the following tasks:
+ *        buildBinutils_<platform>			builds binutils for the platform
+ *        packageBinutilsDev_<platform>      creates the built bundle of stuf we need to build gdis
+ *        unpackBinutilsPrebuilt_<platform>  unpacks the built bundle to be used to build gdis
+ *
+ ******************************************************************************************/
+ 
+model {
+	platforms {
+		linux64 {
+			architecture 'x86_64'
+			operatingSystem 'linux'
+		}
+		osx64 {
+			architecture 'x86_64'
+			operatingSystem 'osx'
+		}
+	}	
+	
+	components {
+		
+		gdis(NativeExecutableSpec) {
+				
+			// NOTE: Windows build requires Mingw and is very very slow and touchy
+			supportedPlatforms.each { targetPlatform it}
+			
+			sources {
+				c {
+					source {
+						srcDir "src/gdis/c"
+						include "disasm_1.c"
+					}
+				}
+			}
+			binaries {
+				all { 
+					def binutilsArtifactsDir = file("build/binutils/${targetPlatform.name}")
+					if ((toolChain in Gcc) || (toolChain in Clang)) {
+						cCompiler.args "-I${binutilsArtifactsDir}/include", "-I${binutilsArtifactsDir}/bfd"
+						linker.args "-L${binutilsArtifactsDir}/lib", "-lopcodes", "-lbfd", "-liberty", "-lz", "-ldl"
+					}
+				}
+			}
+		} 
+	} 	
+	
+	tasks.compileGdisOsx64ExecutableGdisC {
+		dependsOn 'copyBinutilsArtifcats_osx64'
+	}
+	tasks.compileGdisLinux64ExecutableGdisC {
+		dependsOn 'copyBinutilsArtifcats_linux64'
+	}
+	
+}
+
+// change gdis linker output directory to build/os/<platform>
+gradle.taskGraph.whenReady {
+	def p = this.project
+	p.tasks.withType(LinkExecutable).each { t ->
+		File f = t.linkedFile.getAsFile().get()
+		String filename = f.getName()
+		NativePlatform platform = t.targetPlatform.get()
+		String osName = platform.getName()
+		t.linkedFile = p.file("build/os/${osName}/$filename")
+	}
+} 
+
+/*******************************************************************************************
+ * Task to unpack the standard binutils zip file
+ *******************************************************************************************/
+task binutilsUnpack {
+	description "Unpack binutils (for building gdis)"
+	group "Native Build Dependencies"
+	outputs.file { binutilsUnpackDir }
+	onlyIf { !binutilsUnpackDir.exists() }
+	
+	doFirst {
+		if (!binutilsResource.exists()) {
+			throw new GradleException("${binutilsResource.getCanonicalPath()} not found")
+		}
+	}
+	
+	doLast {
+		copy {
+			from tarTree(resources.bzip2("${binutilsResource}"))
+			into file("build")
+		}
+	}
+} 
+
+supportedPlatforms.each { platform ->
+
+	def buildName = "buildBinutils_${platform}"
+	def postBuildName = "copyBinutilsArtifcats_${platform}"
+		
+	def configDir = file("build/config/${platform}")
+	def artifactsDir = file("build/binutils/${platform}")
+		
+	task(buildName) {
+		description "Configure and make binutils for $platform (for building gdis)"
+		group "Native Prebuild Dependencies"
+		
+		onlyIf { !configDir.exists() }
+		
+		dependsOn binutilsUnpack
+		
+		inputs.dir binutilsUnpackDir
+		outputs.dir configDir
+		
+	 	doLast {
+
+			File binutilsDir = binutilsUnpackDir
+			delete configDir
+			
+			println "Configuring binutils - config directory: $configDir"
+			println "${binutilsDir}/configure --prefix=\"${configDir}\" --enable-targets=all --with-zlib=no --disable-nls --disable-werror"
+			configDir.mkdirs();
+			exec {
+				workingDir configDir
+				commandLine "${binutilsDir}/configure", "--prefix=${configDir}", "--enable-targets=all", "--with-zlib=no", "--disable-nls",  "--disable-werror"
+			}
+			
+			println "Building binutils - config directory: $configDir"
+			exec {
+				commandLine "make", "-C", "${configDir}", "all"
+			}
+		}	
+	}
+	
+	task(postBuildName, type: Copy) {
+		description "Copy binutil artifcacts for $platform (for building gdis)"
+		group "Native Prebuild Dependencies"
+		
+		dependsOn buildName
+		
+		destinationDir = artifactsDir
+		
+		into("/include") {
+			from("${binutilsUnpackDir}/include")
+			include "**/*.h"
+		}
+		into("/bfd") {
+			from "${configDir}/bfd"
+			include "**/*.h"
+		}
+		into("/lib") {
+			from "${configDir}/bfd/libbfd.a"
+			from "${configDir}/libiberty/libiberty.a"
+			from "${configDir}/opcodes/libopcodes.a"
+		}
+	}
+
+}
--- a/GPL/GnuDisassembler/certification.manifest
+++ b/GPL/GnuDisassembler/certification.manifest
@ -0,0 +1,14 @@
+##VERSION: 2.0
+##MODULE IP: GPL 2
+##MODULE IP: Public Domain
+.classpath||GHIDRA||||END|
+.project||GHIDRA||||END|
+Module.manifest||Public Domain||||END|
+README.txt||Public Domain||||END|
+build.gradle||Public Domain||||END|
+buildGdis.gradle||Public Domain||||END|
+data/arm_test1.s||Public Domain||||END|
+data/big.elf||Public Domain||||END|
+data/little.elf||Public Domain||||END|
+extension.properties||Public Domain||||END|
+settings.gradle||Public Domain||||END|
--- a/GPL/GnuDisassembler/data/arm_test1.s
+++ b/GPL/GnuDisassembler/data/arm_test1.s
@ -0,0 +1,7 @@
+	.text
+__start:	
+	lw $t0, #4
+	li $t1, #0
+	add $t2, $t0, $t1
+	done
+		
--- a/GPL/GnuDisassembler/data/big.elf
+++ b/GPL/GnuDisassembler/data/big.elf
--- a/GPL/GnuDisassembler/data/little.elf
+++ b/GPL/GnuDisassembler/data/little.elf
--- a/GPL/GnuDisassembler/extension.properties
+++ b/GPL/GnuDisassembler/extension.properties
@ -0,0 +1,6 @@
+name=GnuDisassembler
+description=GNU Disassembler.  Extension is delivered unbuilt.  See module README.txt for build instructions.
+author=Ghidra Team
+createdOn=6/18/2019
+version=@extversion@
+gpl=true
--- a/GPL/GnuDisassembler/settings.gradle
+++ b/GPL/GnuDisassembler/settings.gradle
--- a/GPL/GnuDisassembler/src/gdis/c/disasm_1.c
+++ b/GPL/GnuDisassembler/src/gdis/c/disasm_1.c
@ -0,0 +1,457 @@
+/* ###
+ * IP: GPL 2
+ */
+#include "config.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include "bfd.h"
+#include "dis-asm.h"
+// #include "bucomm.h" // for set_default_bfd_target()
+
+#include "gdis.h"
+
+#define MAX_ASCII_CHAR_BYTE_STRING 256
+
+
+void listSupportedArchMachTargets(void)
+{
+	const char** targetList;
+	const char** archList;
+	int i, j;
+	
+	targetList = bfd_target_list();
+	if(targetList != NULL){
+		for(i=0, j=0; targetList[i] !=0; i++){
+			printf("Supported Target: %s\n", targetList[i]);			
+		}
+	}
+	printf("\ndone with targetList.\n");
+	
+	archList = bfd_arch_list();
+	if(archList != NULL){
+		for(i=0, j=0; archList[i] !=0; i++){
+			printf("Supported Arch: %s\n", archList[i]);			
+		}
+	}
+	printf("\ndone with archList.\n");
+}
+
+
+
+/* sprintf to a "stream".  */
+int objdump_sprintf (SFILE *f, const char *format, ...)
+{
+	
+	int i;
+	size_t n;
+	va_list args;
+ 
+	va_start (args, format);
+	n = vsnprintf (f->buffer + f->pos, BUFF_SIZE, format, args);
+	strncat(disassembled_buffer, f->buffer, n);
+	va_end (args);
+  
+	return n;
+}
+
+
+void configureDisassembleInfo(bfd* abfd,
+							  disassemble_info* info, 
+							  enum bfd_architecture arch, 
+							  unsigned long mach, 
+							  enum bfd_endian end)
+{
+
+	memset(sfile.buffer, 0x00, BUFF_SIZE);
+	
+	INIT_DISASSEMBLE_INFO(*info, stdout, objdump_sprintf);
+	info->arch = (enum bfd_architecture) arch;
+	info->mach = mach;
+	info->flavour = bfd_get_flavour(abfd);	
+	info->endian = end;
+	info->stream = (FILE*)&sfile; // set up our "buffer stream"
+	info->display_endian = BFD_ENDIAN_LITTLE;
+	/* Allow the target to customize the info structure.  */
+	disassemble_init_for_target(info);
+}
+
+disassembler_ftype configureBfd(bfd* abfd, 
+								enum bfd_architecture arch, 
+								unsigned long mach, 
+								enum bfd_endian endian, 
+								disassemble_info* DI,
+								disassembler_ftype* disassemble_fn)
+{	
+	struct bfd_target *xvec;
+	
+	abfd->flags |= EXEC_P;
+	
+	
+	// set up xvec byteorder. 
+	xvec = (struct bfd_target *) malloc (sizeof (struct bfd_target));
+	memset(xvec, 0x00, sizeof (struct bfd_target));	
+	memcpy (xvec, abfd->xvec, sizeof (struct bfd_target));
+	xvec->byteorder = endian;
+	abfd->xvec = xvec;
+	
+	configureDisassembleInfo(abfd, DI, arch, mach, endian);
+	if(endian == BFD_ENDIAN_BIG){
+		bfd_big_endian(abfd);
+		DI->display_endian = DI->endian = BFD_ENDIAN_BIG;
+	}
+	else{
+		bfd_little_endian(abfd);
+		DI->display_endian = DI->endian = BFD_ENDIAN_LITTLE;
+	}
+	
+	/*
+	bfd_error_type err = bfd_get_error();
+	printf("bfd_error_msg: %s.\n", bfd_errmsg(err));
+	*/
+	
+	/* Use libopcodes to locate a suitable disassembler.  */
+	*disassemble_fn = NULL;
+	*disassemble_fn = disassembler (arch, endian == BFD_ENDIAN_BIG, mach, abfd);
+	if (!*disassemble_fn){
+		printf("can't disassemble for arch 0x%08X, mach 0x%08lX\n", arch, mach);
+		exit(1);
+    }
+    
+    return *disassemble_fn;
+}
+
+
+
+int disassemble_buffer( disassembler_ftype disassemble_fn,
+						disassemble_info *info,
+						int* offset,						
+						PDIS_INFO pDisInfo)
+{
+	int i, j, size = 0;
+	int len = 0;
+
+	while ( *offset < info->buffer_length ) {
+		/* call the libopcodes disassembler */
+		memset(pDisInfo->disassemblyString, 0x00, MAX_DIS_STRING);
+		
+		/* set the insn_info_valid bit to 0, as explained in BFD's
+		 * include/dis-asm.h. The bit will then be set to tell us
+		 * whether the decoder supports "extra" information about the
+		 * instruction.
+		 */
+		info->insn_info_valid = 0;
+
+		size = (*disassemble_fn)(info->buffer_vma + *offset, info);
+		/* -- analyze disassembled instruction here -- */
+		/* -- print any symbol names as labels here -- */
+		
+		/* save off corresponding hex bytes */
+		for ( j= 0,i = 0; i < 8; i++, j+=3) {
+			if ( i < size ){				
+				sprintf(&(pDisInfo->bytesBufferAscii[j]), "%02X ", info->buffer[*offset + i]);
+				pDisInfo->bytesBufferBin[i] = info->buffer[*offset + i];
+			}
+		}
+		
+		/* add the augmented information to our disassembly info struct */
+		pDisInfo->count = size;
+		pDisInfo->insn_info_valid = info->insn_info_valid;
+		pDisInfo->branch_delay_insns = info->branch_delay_insns;
+		pDisInfo->data_size = info->data_size;
+		pDisInfo->insn_type = info->insn_type;
+		pDisInfo->target = info->target;
+		pDisInfo->target2 = info->target2;
+
+		strcat(&(pDisInfo->disassemblyString[0]), disassembled_buffer);
+		memset(disassembled_buffer, 0x00, BUFF_SIZE);
+		
+		if(size != 0){
+			*offset += size; /* advance position in buffer */
+			goto END;
+		}
+	}
+
+END:	
+	return size;
+}
+
+void processBuffer(unsigned char* buff, 
+		   int buff_len,
+		   bfd_vma buff_vma,
+		   disassembler_ftype disassemble_fn, 
+		   struct disassemble_info* DI)
+{
+	int bytesConsumed = -1;
+	int offset = 0;
+	int numDisassemblies = 0;
+	int i;
+		
+	DI->buffer = buff; /* buffer of bytes to disassemble */
+	DI->buffer_length = buff_len; /* size of buffer */
+	DI->buffer_vma = buff_vma; /* base RVA of buffer */
+								 
+	memset(disassemblyInfoBuffer, 0x00, sizeof(DIS_INFO)*MAX_NUM_ENTRIES);
+			
+	while((buff_len - offset) > 0 && bytesConsumed != 0 && numDisassemblies < MAX_NUM_ENTRIES){
+		bytesConsumed = disassemble_buffer( disassemble_fn, DI, &offset, &(disassemblyInfoBuffer[numDisassemblies++]));	
+	}
+	for (i = 0; i < numDisassemblies; i++) {
+	    printf("%s\nInfo: %d,%d,%d,%d,%d\n", disassemblyInfoBuffer[i].disassemblyString,
+		   disassemblyInfoBuffer[i].count, 
+		   disassemblyInfoBuffer[i].insn_info_valid, 
+		   disassemblyInfoBuffer[i].branch_delay_insns,
+		   disassemblyInfoBuffer[i].data_size,
+		   disassemblyInfoBuffer[i].insn_type);
+	}
+}
+
+int main(int argc, char* argv[]){
+	struct disassemble_info DI;
+	enum bfd_architecture arch;
+	struct bfd_arch_info ai;
+	unsigned long mach;
+	enum bfd_endian endian;
+	unsigned int end;
+	bfd_vma offset;
+	disassembler_ftype disassemble_fn;
+	char *target = default_target;
+	bfd *bfdfile;
+	unsigned long a,m;
+	char* byteString;
+	char elf_file_location[MAX_ELF_FILE_PATH_LEN];
+	char arch_str[256];
+	char mach_str[256];
+		
+	if ( argc < 8) {
+		fprintf(stderr, "Usage: %s target-str, arch, mach, disassembly base-addr (for rel offsets instrs), full-path to Little and Big Elfs, big/little ascii-byte-string up to %d chars\n", argv[0], MAX_ASCII_CHAR_BYTE_STRING);
+		listSupportedArchMachTargets();
+		const char** archList = bfd_arch_list();
+		const bfd_arch_info_type* ait;
+		while(*archList != NULL){
+			printf("checking against architecture: %s.\n", *archList);
+			ait = NULL;
+			ait = bfd_scan_arch(*archList);
+			if(ait != NULL){
+				printf("archname: %s arch: 0x%08X, mach: 0x%08lX.\n", ait->arch_name, ait->arch, ait->mach);
+			}
+			archList++;
+		}
+		return(1);
+	}
+
+	end = 0x00000000;
+	endian = (enum bfd_endian) 0x00;
+	mach = 0x00000000;
+	arch = (enum bfd_architecture) 0x00;
+	offset = 0x00000000;
+	
+	sscanf(argv[2], "%128s", arch_str);
+	sscanf(argv[3], "%18lX", &mach);
+	sscanf(argv[4], "%10X", &end);
+	sscanf(argv[5], "%18lX", &offset);
+	
+	// if arch starts with 0x, then parse a number
+	//  else lookup the string in the table to get the arch, ignore the mach
+	if (arch_str[0] == '0' && arch_str[1] == 'x') {
+	   sscanf(arch_str, "%10X", &arch);
+	} else {
+		const char** archList = bfd_arch_list();
+		const bfd_arch_info_type* ait;
+		while(*archList != NULL){
+			ait = bfd_scan_arch(*archList);
+			if(strcmp(arch_str, *archList)== 0){
+				arch = ait->arch;
+				mach = ait->mach;
+				break;
+			}
+			ait = NULL;
+			archList++;
+		}
+		if (ait == NULL) {
+		    printf("Couldn't find arch %s\n", arch_str);
+		    return(-1);
+		}
+	}
+	    
+	
+	endian = (enum bfd_endian) end;
+	/* open a correct type of file to fill in most of the required data. */
+	
+	//	printf("Arch is: 0x%08X, Machine is: 0x%08lX Endian is: 0x%02X.\n", arch, mach, endian);
+	
+	memset(elf_file_location, 0x00, MAX_ELF_FILE_PATH_LEN);
+	strncpy(elf_file_location, argv[6], MAX_ELF_FILE_PATH_LEN-sizeof(LITTLE_ELF_FILE)-2); // actual file name and nulls
+
+	// arg[7] is either a hex string or the string "stdin", which
+	// triggers reading line by line from stdin.
+
+	byteString  = argv[7];
+	int stdin_mode = 2; // use CLI
+	if (strcmp(byteString, "stdin") == 0) {
+		stdin_mode = 1; // use STDIN
+	}
+
+	unsigned char byteBuffer[BYTE_BUFFER_SIZE];
+	char byteStringBuffer[(BYTE_BUFFER_SIZE*2)];
+
+	char addressStringBuffer[128];
+
+	if (endian == BFD_ENDIAN_BIG){
+		strcat(elf_file_location, BIG_ELF_FILE);
+	}
+	else {
+		strcat(elf_file_location, LITTLE_ELF_FILE);
+	}
+	
+	while (stdin_mode) {
+	
+		// convert user input AsciiHex to Binary data for processing
+		char tmp[3];
+		unsigned int byteValue;
+		tmp[0] = tmp[1]  = tmp[2] = 0x00;
+
+		if (stdin_mode == 1) { // use stdin
+			// read in the address
+			if (fgets(addressStringBuffer, sizeof(addressStringBuffer), stdin)) {
+
+			    //fprintf(stderr, "read: %s\n", addressStringBuffer);
+				//char *p = strchr(addressStringBuffer, '\n');
+				//if (p) {
+				//	*p = '\0';
+				//}
+
+				sscanf(addressStringBuffer, "%18lX", &offset);
+			}
+			//getchar();
+			// read in the ASCII hex string from stdin
+			if (fgets(byteStringBuffer, sizeof(byteStringBuffer), stdin)) {
+
+			    //fprintf(stderr, "read: %s\n", byteStringBuffer);
+				// remove trailing newline 
+				char *p = strchr(byteStringBuffer, '\n');
+				if (p) {
+					*p = '\0';
+				}
+				//if (strcmp(byteStringBuffer, "EOF") == 0) {
+				//return 0; // terminate on EOF string
+				//}
+			} else {
+			    fprintf(stderr, "exiting, no ASCII hex found\n");
+			    return 0; // finished! #TODO
+			}
+
+		} else {
+			if(strlen(byteString) > BYTE_BUFFER_SIZE*2) {
+				fprintf(stderr, "Max ascii string size is %d you provided: %lu chars. Exiting.\n", BYTE_BUFFER_SIZE*2, 
+				       strlen(byteString));
+				exit(-1);
+			}
+			strncpy(byteStringBuffer, byteString, BYTE_BUFFER_SIZE*2);
+			stdin_mode = 0; // break out of the while loop
+		}
+
+		int size = strlen(byteStringBuffer);
+		if((size % 2) != 0){
+			fprintf(stderr, "need even-number of ascii chars for byte-stream: (offset: %08lx, %s, %ld)\n", offset, byteStringBuffer, strlen(byteStringBuffer));
+			exit(-1);
+		}
+
+		memset(byteBuffer, 0x00, BYTE_BUFFER_SIZE);
+
+		//
+		// TODO:
+		// check to make sure chars are only valid HEX.
+		//
+		int i, j;
+		for(i=j=0; (i < size) && (j < BYTE_BUFFER_SIZE); i+=2, j++){
+			tmp[0] = byteStringBuffer[i];
+			tmp[1] = byteStringBuffer[i+1];
+			tmp[2] = 0;
+			sscanf(tmp, "%02X", &byteValue);
+			byteBuffer[j] = (unsigned char)byteValue;
+		}
+
+		/*
+		  for(j=0; j < BYTE_BUFFER_SIZE; j++){
+		  printf("0x%02X ", byteBuffer[j]);
+		  }
+		*/
+	
+		bfd_init( );
+		target = argv[1];
+		bfd_set_default_target(target);
+
+		//		printf("Debug: BFD sample file: %s\n", elf_file_location);
+		//		printf("Debug: LITTLE: %s\n", LITTLE_ELF_FILE);
+		//		printf("Debug: BIG: %s\n", BIG_ELF_FILE);
+
+		if(endian == BFD_ENDIAN_BIG){
+			bfdfile = bfd_openr(elf_file_location, target );
+			if ( ! bfdfile ) {
+				printf("Error opening BIG ELF file: %s\n", elf_file_location);
+				bfd_perror( "Error on bfdfile" );	
+				return(3);
+			}
+		}
+		else{
+			bfdfile = bfd_openr(elf_file_location, target );
+			if ( ! bfdfile ) {
+				printf("Error opening LITTLE ELF file: %s\n", elf_file_location);
+				// bfdfile = bfd_openr(elf_file_location, target );
+				bfd_perror( "Error on bfdfile" );	
+				return(3);
+			}
+		}
+	
+		memset((void*) &DI, 0x00, sizeof(struct disassemble_info));
+
+		disassemble_fn = NULL;
+	
+		// important set up!
+		//---------------------------------------
+		ai.arch = arch;
+		ai.mach = mach;
+		bfd_set_arch_info(bfdfile, &ai);
+		//---------------------------------------
+	
+		/*
+		  bfd_error_type err = bfd_get_error();
+		  printf("bfd_error_msg: %s.\n", bfd_errmsg(err));
+		*/
+	
+		configureBfd(bfdfile, arch, mach, endian, &DI, &disassemble_fn);
+
+		/*
+		  err = bfd_get_error();
+		  printf("bfd_error_msg: %s.\n", bfd_errmsg(err));
+		*/
+	
+		if (disassemble_fn == NULL){
+			fprintf(stderr, "Error: disassemble_fn is NULL. Nothing I can do.\n");
+			exit(1);
+		}
+		else{
+			/*
+			  printf("the disassemble_fn func pointer is: 0x%08X.\n", disassemble_fn);
+			  printf("We can try to disassemble for this arch/mach. calling disassemble_init_for_target().\n");
+			*/
+			disassemble_init_for_target(&DI);
+
+			// go diassemble the buffer and build up the result in a accumulator string buffer.
+			processBuffer(byteBuffer, size >> 1, offset, disassemble_fn, &DI); // 
+
+		}
+
+		free((void*)bfdfile->xvec);
+		bfd_close(bfdfile);
+		
+		printf("EOF\n");
+		fflush(stdout);
+
+	} // while loop on lines of stdin
+	
+	return 0;
+}
--- a/GPL/GnuDisassembler/src/gdis/c/gdis.h
+++ b/GPL/GnuDisassembler/src/gdis/c/gdis.h
@ -0,0 +1,94 @@
+/* ###
+ * IP: GPL 2
+ */
+#ifndef _GDIS_H_
+#define _GDIS_H_
+
+#define BYTE_BUFFER_SIZE 128
+
+#define LITTLE_ELF_FILE "little.elf" // built for intel x64
+#define BIG_ELF_FILE "big.elf"
+
+#define BUFF_SIZE 128
+
+#define MAX_DIS_STRING 		128
+#define MAX_BYTES_STRING 	64
+#define MAX_BYTES			64
+#define MAX_NUM_ENTRIES		64
+#define MAX_ELF_FILE_PATH_LEN 512
+
+
+typedef struct _DIS_INFO_{
+    char disassemblyString[MAX_DIS_STRING];
+    char bytesBufferAscii[MAX_BYTES_STRING];
+    unsigned char bytesBufferBin[MAX_BYTES];
+
+    int count; /* Number of bytes consumed */
+
+    char insn_info_valid;		/* Branch info has been set. */
+    char branch_delay_insns;	/* How many sequential insn's will run before
+				   a branch takes effect.  (0 = normal) */
+    char data_size;		/* Size of data reference in insn, in bytes */
+    enum dis_insn_type insn_type;	/* Type of instruction */
+    bfd_vma target;		/* Target address of branch or dref, if known;
+				   zero if unknown.  */
+    bfd_vma target2;		/* Second target address for dref2 */
+
+} DIS_INFO, *PDIS_INFO;
+
+static DIS_INFO disassemblyInfoBuffer[MAX_NUM_ENTRIES];
+
+char mnemonic[32] = {0}, src[32] = {0}, dest[32] = {0}, arg[32] = {0};
+char disassembled_buffer[BUFF_SIZE];
+
+
+/* Pseudo FILE object for strings.  */
+typedef struct
+{
+  // char *buffer;
+  char buffer[BUFF_SIZE];
+  size_t pos;
+  size_t alloc;
+} SFILE;
+
+
+static SFILE sfile;
+
+static char *default_target = NULL;	/* Default at runtime.  */
+
+// ------------------------------------------------------------------------
+
+void listSupportedArchMachTargets(void);
+
+int objdump_sprintf (SFILE *f, const char *format, ...);
+
+void configureDisassembleInfo(bfd* abfd,
+							  disassemble_info* info, 
+							  enum bfd_architecture arch, 
+							  unsigned long mach, 
+							  enum bfd_endian end);
+							  
+disassembler_ftype configureBfd(bfd* abfd, 
+								enum bfd_architecture arch, 
+								unsigned long mach, 
+								enum bfd_endian endian, 
+								disassemble_info* DI,
+								disassembler_ftype* disassemble_fn);
+
+int disassemble_buffer( disassembler_ftype disassemble_fn,
+						disassemble_info *info,
+						int* offset,						
+						PDIS_INFO pDisInfo);
+
+void processBuffer(unsigned char* buff, 
+		   int buff_len,
+		   bfd_vma buff_vma,
+		   disassembler_ftype disassemble_fn, 
+		   struct disassemble_info* DI);
+
+				   
+						
+
+
+
+#endif
--- a/GPL/certification.local.manifest
+++ b/GPL/certification.local.manifest
@ -1,5 +1,4 @@
 ##VERSION: 2.0
 ##MODULE IP: Public Domain
-build.gradle||Public Domain||||END|
+gpl.gradle||Public Domain||||END|
 nativeBuildProperties.gradle||Public Domain||||END|
-settings.gradle||Public Domain||||END|
--- a/GPL/build.gradle
+++ b/GPL/build.gradle
@ -1,11 +1,13 @@
-project.ext.BIN_REPO = file("${projectDir}/../../ghidra.bin").absolutePath
+
+// BIN_REPO only useable in full Ghidra source configuration
+project.ext.BIN_REPO = file("../../../ghidra.bin").absolutePath

 project.ext.set("OS_NAMES", ["osx64", "win32", "win64", "linux64"])

 /*********************************************************************************
 * Returns the local platform name.
 *********************************************************************************/
-String getCurrentPlatformName() {
+ext.getCurrentPlatformName = {

 	String osName = System.getProperty("os.name")
 	String archName = System.getProperty("os.arch")
@ -37,10 +39,13 @@ String getCurrentPlatformName() {
 *	Helper method that returns a file that is the same relative location in the bin repo
 *  as the given project is in its repo.
 ******************************************************************************************/
-File getProjectLocationInBinRepo(Project p) {
-	String relativePath = getGhidraRelativePath(p)
-	
+ext.getProjectLocationInBinRepo = {
+	String relativePath = getGhidraRelativePath(this.project)
+	println("RELATIVE: $relativePath")
 	File binRepoRootProject = new File("${BIN_REPO}")
+	if (!binRepoRootProject.isDirectory()) {
+		throw new GradleException("Task requires Ghidra source and ghidra.bin")
+	}
 	return new File(binRepoRootProject, relativePath)
 }
 /****************************************************************************************
--- a/GPL/settings.gradle
+++ b/GPL/settings.gradle
@ -1,4 +0,0 @@
-
-include "DemanglerGnu"
-include "DMG"
-include "CabExtract"
--- a/Ghidra/Extensions/SleighDevTools/Module.manifest
+++ b/Ghidra/Extensions/SleighDevTools/Module.manifest
--- a/Ghidra/Extensions/SleighDevTools/build.gradle
+++ b/Ghidra/Extensions/SleighDevTools/build.gradle
@ -0,0 +1,9 @@
+apply from: "$rootProject.projectDir/gradle/distributableGhidraExtension.gradle"
+apply from: "$rootProject.projectDir/gradle/javaProject.gradle"
+apply from: "$rootProject.projectDir/gradle/javaTestProject.gradle"
+apply plugin: 'eclipse'
+eclipse.project.name = 'Xtra SleighDevTools'
+
+dependencies {
+	compile project(':Base')
+}
--- a/Ghidra/Extensions/SleighDevTools/certification.manifest
+++ b/Ghidra/Extensions/SleighDevTools/certification.manifest
@ -0,0 +1,8 @@
+##VERSION: 2.0
+.classpath||GHIDRA||||END|
+.project||GHIDRA||||END|
+Module.manifest||GHIDRA||||END|
+build.gradle||GHIDRA||||END|
+data/ExtensionPoint.manifest||GHIDRA||||END|
+data/LanguageMap.txt||GHIDRA||||END|
+extension.properties||GHIDRA||||END|
--- a/Ghidra/Extensions/SleighDevTools/data/ExtensionPoint.manifest
+++ b/Ghidra/Extensions/SleighDevTools/data/ExtensionPoint.manifest
@ -0,0 +1 @@
+ExternalDisassembler
--- a/Ghidra/Extensions/SleighDevTools/data/LanguageMap.txt
+++ b/Ghidra/Extensions/SleighDevTools/data/LanguageMap.txt
@ -0,0 +1,13 @@
+// Format: LanguageID#CustomGDISExecutable
+//
+// Mapping of LanguageNameFromGhidra to external (gdis) architecture names is no longer done here.
+// This functionality has been moved to each language's ldefs file.
+// External names are mapped via 'external_name' tags in language definitions.
+// The CustomGDISExecutable is found via a call to Application.getOSFile(), which will search in
+// the platform-specific OS directory within all modules.
+//
+// Lines starting with "//" are not parsed.
+//
+// '*' can be used to wild-card parts of the languageID
+//
+
--- a/Ghidra/Extensions/SleighDevTools/extension.properties
+++ b/Ghidra/Extensions/SleighDevTools/extension.properties
@ -0,0 +1,5 @@
+name=SleighDevTools
+description=Sleigh language development tools including external disassembler capabilities. The GnuDisassembler extension may be also be required as a disassembly provider.
+author=Ghidra Team
+createdOn=6/18/2019
+version=@extversion@
--- a/Ghidra/Extensions/SleighDevTools/ghidra_scripts/CompareSleighExternal.java
+++ b/Ghidra/Extensions/SleighDevTools/ghidra_scripts/CompareSleighExternal.java
@ -0,0 +1,320 @@
+/* ###
+ * IP: GHIDRA
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Compare Sliegh disassembly with external disassembly results
+
+import java.util.HashMap;
+import java.util.List;
+
+import ghidra.app.script.GhidraScript;
+import ghidra.app.util.PseudoDisassembler;
+import ghidra.app.util.PseudoInstruction;
+import ghidra.app.util.disassemble.GNUExternalDisassembler;
+import ghidra.program.disassemble.Disassembler;
+import ghidra.program.model.address.*;
+import ghidra.program.model.lang.Register;
+import ghidra.program.model.lang.UnknownInstructionException;
+import ghidra.program.model.listing.BookmarkType;
+import ghidra.program.model.listing.CodeUnit;
+import ghidra.program.model.scalar.Scalar;
+import ghidra.util.exception.CancelledException;
+
+public class CompareSleighExternal extends GhidraScript {
+
+	@Override
+	public void run() throws Exception {
+		if (currentProgram == null) {
+			return;
+		}
+		AddressSetView set = currentSelection;
+		if (set == null || set.isEmpty()) {
+			set = currentProgram.getMemory().getLoadedAndInitializedAddressSet();
+		}
+			
+		putEquivalent("xzr", "x31");  // Think they messed up and allowed x31, there is no x31
+		putEquivalent("wzr", "w31");  // Think they messed up and allowed w31, there is no w31
+		putEquivalent("r12", "ip");
+		
+		int completed = 0;
+		monitor.initialize(set.getNumAddresses());
+
+		AddressIterator addresses = set.getAddresses(true);
+		
+		PseudoDisassembler pseudoDisassembler = new PseudoDisassembler(currentProgram);
+
+		GNUExternalDisassembler dis = new GNUExternalDisassembler();
+		
+		long align = currentProgram.getLanguage().getInstructionAlignment();
+		while (addresses.hasNext()) {
+			monitor.checkCanceled();
+			Address addr = addresses.next();
+			
+			completed++;
+			
+			// only on valid boundaries
+			if ((addr.getOffset() % align) != 0) {
+				continue;
+			}
+			clearBad(addr);
+
+			monitor.setProgress(completed);
+
+			CodeUnit cu = currentProgram.getListing().getCodeUnitAt(addr);
+			if (cu == null) {
+				continue;
+			}
+			String str = dis.getDisassembly(cu);
+			
+			str = str.toLowerCase();
+			
+			PseudoInstruction pinst = null;
+			try {
+				pinst = pseudoDisassembler.disassemble(addr);
+			} catch (UnknownInstructionException e) {
+				// didn't get an instruction, did external not get one?
+				if (str.startsWith(".inst") && str.endsWith("undefined")) {
+					continue;
+				}
+				markErrorBad(addr,"Unimplemented Instruction", str);
+				continue;
+			}
+			// didn't get an instruction, did external not get one?
+			if (pinst == null && str.startsWith(".inst") && str.endsWith("undefined")) {
+				continue;
+			}
+			
+			if (pinst == null) {
+				markErrorBad(addr,"Unimplemented Instruction", str);
+				continue;
+			}
+			
+			// collapse both instruction to strings, compare removing whitespace, and to-lower
+			String pStr = pinst.toString().toLowerCase().replaceAll("\\s","");
+			String eStr = str.toLowerCase().replaceAll("\\s", "");
+			
+			// simple equivalence
+			if (pStr.equals(eStr)) {
+				continue;
+			}
+			
+			String mnemonic = pinst.getMnemonicString().toLowerCase();
+			if (!str.startsWith(mnemonic)) {
+				markBad(addr,"Mnemonic Disagreement", str + " != " + mnemonic);
+				continue;
+			}
+			
+			int start = str.indexOf(" ");
+
+			for (int opIndex = 0; opIndex < pinst.getNumOperands(); opIndex++) {
+				// try to parse the operand string from the instruction
+				int sepEnd = str.indexOf(",", start);
+				
+				String extOp = getExtOpStr(str, start, sepEnd);
+				start = sepEnd + 1;
+				
+				String valStr = null;
+				
+				// TODO: could remove all characters, making sure none are left!
+				int loc = 0;
+				boolean subRegList = false;
+				List<Object> opObjList = pinst.getDefaultOperandRepresentationList(opIndex);
+				for (Object object : opObjList) {
+					if (object instanceof Character) {
+						Character ch = (Character) object;
+						ch = Character.toLowerCase(ch);
+						loc = extOp.indexOf(ch);
+						if (loc != -1) {
+							extOp = extOp.substring(0,loc) + extOp.substring(loc+1);
+							continue;
+						}
+						if (ch.equals(',')) {
+							if (subRegList) {
+								continue;
+							}
+							// gotta move into next string, must be embedded comma
+							sepEnd = str.indexOf(",", start);
+							
+							extOp = getExtOpStr(str, start, sepEnd);
+							start = sepEnd + 1;
+							continue;
+						}
+						if (ch.equals(' ')) {
+							continue;
+						}
+						markBad(addr,"Missing String Markup", ch.toString());
+						break;
+					}
+					if (object instanceof Scalar) {
+						// find the scalar, hex or decimal
+						Scalar scalar = (Scalar) object;
+						valStr = scalar.toString(16, false, false, "0x", "");
+						loc = extOp.indexOf(valStr);
+						if (loc != -1) {
+							extOp = extOp.substring(0,loc) + extOp.substring(loc+valStr.length());
+							continue;
+						}
+						valStr = scalar.toString(16, true, false, "0x", "");
+						loc = extOp.indexOf(valStr);
+						if (loc != -1) {
+							extOp = extOp.substring(0,loc) + extOp.substring(loc+valStr.length());
+							continue;
+						}
+						valStr = scalar.toString(10, false, true, "", "");
+						loc = extOp.indexOf(valStr);
+						if (loc != -1) {
+							extOp = extOp.substring(0,loc) + extOp.substring(loc+valStr.length());
+							continue;
+						}
+						valStr = scalar.toString(10, false, false, "", "");
+						loc = extOp.indexOf(valStr);
+						if (loc != -1) {
+							extOp = extOp.substring(0,loc) + extOp.substring(loc+valStr.length());
+							continue;
+						}
+						valStr = scalar.toString(16, false, false, "", "");
+						loc = extOp.indexOf(valStr);
+						if (loc != -1) {
+							extOp = extOp.substring(0,loc) + extOp.substring(loc+valStr.length());
+							continue;
+						}
+						valStr = scalar.toString(16, true, false, "", "");
+						loc = extOp.indexOf(valStr);
+						if (loc != -1) {
+							extOp = extOp.substring(0,loc) + extOp.substring(loc+valStr.length());
+							continue;
+						}
+						markBad(addr,"Missing Scalar", valStr);
+						break;
+					}
+					if (object instanceof Register) {
+						Register reg = (Register) object;
+						loc = extOp.indexOf(reg.getName().toLowerCase());
+						if (loc != -1) {
+							// check for '-' first
+							if (extOp.charAt(0) == '-') {
+								extOp = extOp.substring(1);
+								loc = 0;
+								subRegList = false;
+							}
+							extOp = extOp.substring(0,loc) + extOp.substring(loc+reg.getName().length());
+							if (extOp.length() > 0 && extOp.charAt(0) == '-') {
+								subRegList = true;
+							}
+							continue;
+						}
+						
+						// check for equivalent register
+						String equivReg = regGetEquivalent(reg.getName());
+						if (equivReg != null) { 
+							loc = extOp.indexOf(equivReg);
+							if (loc != -1) {
+								extOp = extOp.substring(0,loc) + extOp.substring(loc+equivReg.length());
+								continue;
+							}
+						}
+						
+						loc = extOp.indexOf('-'); // could be a register list, assume we will find beginning and end register
+						if (loc != -1) {
+							continue;
+						}
+						markBad(addr,"Missing Register", reg.toString());
+						break;
+					}
+					if (object instanceof Address) {
+						Address dest = (Address) object;
+						valStr = dest.toString(false,true);
+						valStr = "0x" + valStr;
+						loc = extOp.indexOf(valStr);
+						if (loc != -1) {
+							extOp = extOp.substring(0,loc) + extOp.substring(loc+valStr.length());
+							continue;
+						}
+						valStr = dest.toString(false,false);
+						valStr = "0x" + valStr;
+						loc = extOp.indexOf(valStr);
+						if (loc != -1) {
+							extOp = extOp.substring(0,loc) + extOp.substring(loc+valStr.length());
+							continue;
+						}
+						valStr = dest.toString(false,true);
+						loc = extOp.indexOf(valStr);
+						if (loc != -1) {
+							extOp = extOp.substring(0,loc) + extOp.substring(loc+valStr.length());
+							continue;
+						}
+						valStr = dest.toString(false,false);
+						loc = extOp.indexOf(valStr);
+						if (loc != -1) {
+							extOp = extOp.substring(0,loc) + extOp.substring(loc+valStr.length());
+							continue;
+						}
+						markBad(addr,"Missing Address", dest.toString());
+					}
+				}
+				extOp = extOp.trim();
+				if (extOp.length() > 0 && !extOp.startsWith(";") && !extOp.startsWith("//") && !extOp.equals("#") && !extOp.matches("[0x]+")) {
+					markBad(addr,"Missing characters", extOp);
+				}
+			}
+		}
+
+	}
+
+	HashMap<String, String> equivRegisters = new HashMap<String, String>();
+	
+	private String regGetEquivalent(String name) {
+		return equivRegisters.get(name);
+	}
+	
+	private void putEquivalent(String name, String equiv) {
+		equivRegisters.put(name,  equiv);
+	}
+
+	private String getExtOpStr(String str, int start, int sepEnd) {
+		String opS = null;
+		if (start == -1) {
+			return "";
+		}
+		if (sepEnd == -1) {
+			opS = str.substring(start);
+		} else {
+			opS = str.substring(start, sepEnd);
+		}
+		String extOp = opS.trim();
+		return extOp;
+	}
+
+	private void markBad(Address addr, String type, String error) {
+		currentProgram.getBookmarkManager().setBookmark(addr, BookmarkType.WARNING,
+			type,
+			error);
+	}
+	
+	private void markErrorBad(Address addr, String type, String error) {
+		currentProgram.getBookmarkManager().setBookmark(addr, BookmarkType.ERROR,
+			Disassembler.ERROR_BOOKMARK_CATEGORY,
+			error);
+	}
+	
+	private void clearBad(Address addr) {
+		AddressSet set = new AddressSet(addr);
+		try {
+			currentProgram.getBookmarkManager().removeBookmarks(set, BookmarkType.WARNING, monitor);
+			currentProgram.getBookmarkManager().removeBookmarks(set, BookmarkType.ERROR, monitor);
+		} catch (CancelledException e) {
+			// do nothing
+		}
+	}
+}
--- a/Ghidra/Extensions/SleighDevTools/ghidra_scripts/GNUDisassembleBlockScript.java
+++ b/Ghidra/Extensions/SleighDevTools/ghidra_scripts/GNUDisassembleBlockScript.java
@ -0,0 +1,79 @@
+/* ###
+ * IP: GHIDRA
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import ghidra.app.script.GhidraScript;
+import ghidra.app.util.disassemble.GNUExternalDisassembler;
+import ghidra.app.util.disassemble.GnuDisassembledInstruction;
+import ghidra.program.model.address.Address;
+
+import java.util.List;
+
+public class GNUDisassembleBlockScript extends GhidraScript {
+
+	@Override
+	protected void run() throws Exception {
+
+		if (currentProgram == null || currentAddress == null) {
+			return;
+		}
+
+		GNUExternalDisassembler dis = new GNUExternalDisassembler();
+
+		Address addr = currentAddress.getNewAddress(currentAddress.getOffset() & -32); // block aligned address
+
+		List<GnuDisassembledInstruction> results = dis.getBlockDisassembly(currentProgram, addr, 5);
+
+		if (results == null) {
+			println("Block Disassembly Failed!");
+			return;
+		}
+
+		int maxByteLen = 0;
+		for (GnuDisassembledInstruction result : results) {
+			maxByteLen = Math.max(maxByteLen, result.getNumberOfBytesInInstruction());
+		}
+
+		StringBuilder sb = new StringBuilder();
+		for (GnuDisassembledInstruction result : results) {
+			sb.append(addr.toString());
+			sb.append(' ');
+			int cnt = 0;
+			byte[] bytes = new byte[result.getNumberOfBytesInInstruction()];
+			currentProgram.getMemory().getBytes(addr, bytes);
+			for (byte b : bytes) {
+				if (b >= 0 && b < 0x10) {
+					sb.append('0');
+				}
+				sb.append(Integer.toHexString(b & 0xff));
+				sb.append(' ');
+				++cnt;
+			}
+			if (cnt < maxByteLen) {
+				int pad = (maxByteLen - cnt) * 3;
+				for (int i = 0; i < pad; i++) {
+					sb.append(' ');
+				}
+			}
+			sb.append(result.getInstruction());
+			sb.append("\n");
+			addr = addr.add(bytes.length);
+		}
+		if (sb.length() != 0) {
+			println("Block Disassembly:\n" + sb.toString());
+		}
+
+	}
+
+}
--- a/Ghidra/Extensions/SleighDevTools/src/main/java/ghidra/app/util/disassemble/ExternalDisassembler.java
+++ b/Ghidra/Extensions/SleighDevTools/src/main/java/ghidra/app/util/disassemble/ExternalDisassembler.java
@ -0,0 +1,32 @@
+/* ###
+ * IP: GHIDRA
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package ghidra.app.util.disassemble;
+
+import ghidra.program.model.lang.Language;
+import ghidra.program.model.listing.CodeUnit;
+import ghidra.util.classfinder.ExtensionPoint;
+
+public interface ExternalDisassembler extends ExtensionPoint {
+
+	public String getDisassembly(CodeUnit cu) throws Exception;
+
+	public String getDisassemblyOfBytes(Language language, boolean isBigEndian, long address,
+			byte[] byteString) throws Exception;
+
+	public boolean isSupportedLanguage(Language language);
+
+	public void destroy();
+}
--- a/Ghidra/Extensions/SleighDevTools/src/main/java/ghidra/app/util/disassemble/ExternalDisassemblyFieldFactory.java
+++ b/Ghidra/Extensions/SleighDevTools/src/main/java/ghidra/app/util/disassemble/ExternalDisassemblyFieldFactory.java
@ -0,0 +1,166 @@
+/* ###
+ * IP: GHIDRA
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package ghidra.app.util.disassemble;
+
+import java.awt.Color;
+import java.math.BigInteger;
+import java.util.*;
+
+import docking.widgets.fieldpanel.field.*;
+import docking.widgets.fieldpanel.support.FieldLocation;
+import ghidra.app.util.HighlightProvider;
+import ghidra.app.util.viewer.field.*;
+import ghidra.app.util.viewer.format.FieldFormatModel;
+import ghidra.app.util.viewer.proxy.ProxyObj;
+import ghidra.framework.options.Options;
+import ghidra.framework.options.ToolOptions;
+import ghidra.program.model.lang.Language;
+import ghidra.program.model.listing.CodeUnit;
+import ghidra.program.util.ProgramLocation;
+import ghidra.util.classfinder.ClassSearcher;
+
+public class ExternalDisassemblyFieldFactory extends FieldFactory {
+
+	private static List<ExternalDisassembler> availableDisassemblers;
+
+	private static synchronized List<ExternalDisassembler> getAvailableDisassemblers() {
+		if (availableDisassemblers != null) {
+			return availableDisassemblers;
+		}
+		availableDisassemblers = new ArrayList<>();
+
+		// find the available external disassemblers
+		Set<ExternalDisassembler> extDisassemblers =
+			ClassSearcher.getInstances(ExternalDisassembler.class);
+
+		for (ExternalDisassembler disassember : extDisassemblers) {
+			availableDisassemblers.add(disassember);
+		}
+		return availableDisassemblers;
+	}
+
+	public static final String FIELD_NAME = "External Disassembly";
+
+	public ExternalDisassemblyFieldFactory() {
+		super(FIELD_NAME);
+	}
+
+	private ExternalDisassemblyFieldFactory(FieldFormatModel model, HighlightProvider hlProvider,
+			Options displayOptions, Options fieldOptions) {
+		super(FIELD_NAME, model, hlProvider, displayOptions, fieldOptions);
+	}
+
+	@Override
+	public void fieldOptionsChanged(Options options, String optionName, Object oldValue,
+			Object newValue) {
+		// have no options
+	}
+
+	@Override
+	public boolean acceptsType(int category, Class<?> proxyObjectClass) {
+		return (category == FieldFormatModel.INSTRUCTION_OR_DATA);
+	}
+
+	@Override
+	public FieldLocation getFieldLocation(ListingField bf, BigInteger index, int fieldNum,
+			ProgramLocation loc) {
+		if (loc instanceof ExternalDisassemblyFieldLocation) {
+			return new FieldLocation(index, fieldNum,
+				((ExternalDisassemblyFieldLocation) loc).getRow(),
+				((ExternalDisassemblyFieldLocation) loc).getCharOffset());
+		}
+		return null;
+	}
+
+	@Override
+	public ProgramLocation getProgramLocation(int row, int col, ListingField bf) {
+		ProxyObj<?> proxy = bf.getProxy();
+		Object obj = proxy.getObject();
+		if (!(obj instanceof CodeUnit)) {
+			return null;
+		}
+		CodeUnit cu = (CodeUnit) obj;
+
+		return new ExternalDisassemblyFieldLocation(cu.getProgram(), cu.getMinAddress(), row, col);
+	}
+
+	@Override
+	public FieldFactory newInstance(FieldFormatModel formatModel,
+			HighlightProvider highlightProvider, ToolOptions options, ToolOptions fieldOptions) {
+		return new ExternalDisassemblyFieldFactory(formatModel, highlightProvider, options,
+			fieldOptions);
+	}
+
+	private ExternalDisassembler getDisassembler(Language language) {
+		for (ExternalDisassembler disassembler : getAvailableDisassemblers()) {
+			if (disassembler.isSupportedLanguage(language)) {
+				return disassembler;
+			}
+		}
+		return null;
+	}
+
+	@Override
+	public ListingField getField(ProxyObj<?> proxy, int varWidth) {
+		if (!enabled) {
+			return null;
+		}
+		Object obj = proxy.getObject();
+		if (!(obj instanceof CodeUnit)) {
+			return null;
+		}
+		CodeUnit cu = (CodeUnit) obj;
+
+		try {
+			String disassembly = getDisassemblyText(cu);
+			if (disassembly == null) {
+				return null;
+			}
+			AttributedString text = new AttributedString(disassembly, Color.black, getMetrics());
+			FieldElement fieldElement = new TextFieldElement(text, 0, 0);
+			return ListingTextField.createSingleLineTextField(this, proxy, fieldElement,
+				startX + varWidth, width, hlProvider);
+		}
+		catch (Exception e) {
+			return getErrorText(proxy, varWidth, e);
+		}
+	}
+
+	private String getDisassemblyText(CodeUnit cu) throws Exception {
+		Language language = cu.getProgram().getLanguage();
+		ExternalDisassembler disassembler = getDisassembler(language);
+		if (disassembler == null) {
+			return null;
+		}
+		String disassembly = disassembler.getDisassembly(cu);
+		if (disassembly == null) {
+			return null;
+		}
+
+		return disassembly;
+	}
+
+	private ListingTextField getErrorText(ProxyObj<?> proxy, int varWidth, Exception e) {
+		String message = e.getMessage();
+		if (message == null) {
+			message = e.toString();
+		}
+		AttributedString errorText = new AttributedString(message, Color.red, getMetrics());
+		FieldElement fieldElement = new TextFieldElement(errorText, 0, 0);
+		return ListingTextField.createSingleLineTextField(this, proxy, fieldElement,
+			startX + varWidth, width, hlProvider);
+	}
+}
--- a/Ghidra/Extensions/SleighDevTools/src/main/java/ghidra/app/util/disassemble/ExternalDisassemblyFieldLocation.java
+++ b/Ghidra/Extensions/SleighDevTools/src/main/java/ghidra/app/util/disassemble/ExternalDisassemblyFieldLocation.java
@ -0,0 +1,35 @@
+/* ###
+ * IP: GHIDRA
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package ghidra.app.util.disassemble;
+
+import ghidra.program.model.address.Address;
+import ghidra.program.model.listing.Program;
+import ghidra.program.util.ProgramLocation;
+
+public class ExternalDisassemblyFieldLocation extends ProgramLocation {
+
+	public ExternalDisassemblyFieldLocation(Program program, Address addr, int row, int charOffset) {
+		super(program, addr, row, 0, charOffset);
+	}
+
+	/**
+	 * Get the row within a group of pcode strings.
+	 */
+	public ExternalDisassemblyFieldLocation() {
+		// for deserialization
+	}
+
+}
--- a/Ghidra/Extensions/SleighDevTools/src/main/java/ghidra/app/util/disassemble/ExternalStreamHandler.java
+++ b/Ghidra/Extensions/SleighDevTools/src/main/java/ghidra/app/util/disassemble/ExternalStreamHandler.java
@ -0,0 +1,43 @@
+/* ###
+ * IP: GHIDRA
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package ghidra.app.util.disassemble;
+
+import ghidra.util.Msg;
+
+import java.io.*;
+
+public class ExternalStreamHandler extends Thread {
+	private InputStream inStream;
+
+	ExternalStreamHandler(InputStream inStream) {
+		this.inStream = inStream;
+	}
+
+	@Override
+	public void run() {
+		try {
+			InputStreamReader inStreamReader = new InputStreamReader(inStream);
+			BufferedReader buffReader = new BufferedReader(inStreamReader);
+			String line;
+			while ((line = buffReader.readLine()) != null) {
+				Msg.error(ExternalDisassemblyFieldFactory.class, "Error in Disassembler: " + line);
+			}
+		}
+		catch (IOException ioe) {
+			ioe.printStackTrace();
+		}
+	}
+}
--- a/Ghidra/Extensions/SleighDevTools/src/main/java/ghidra/app/util/disassemble/GNUExternalDisassembler.java
+++ b/Ghidra/Extensions/SleighDevTools/src/main/java/ghidra/app/util/disassemble/GNUExternalDisassembler.java
@ -0,0 +1,646 @@
+/* ###
+ * IP: GHIDRA
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package ghidra.app.util.disassemble;
+
+import java.io.*;
+import java.util.*;
+
+import generic.jar.ResourceFile;
+import ghidra.app.util.bin.ByteProvider;
+import ghidra.app.util.bin.MemoryByteProvider;
+import ghidra.framework.*;
+import ghidra.program.model.address.Address;
+import ghidra.program.model.address.AddressOutOfBoundsException;
+import ghidra.program.model.lang.Language;
+import ghidra.program.model.lang.LanguageID;
+import ghidra.program.model.listing.CodeUnit;
+import ghidra.program.model.listing.Program;
+import ghidra.program.model.mem.MemBuffer;
+import ghidra.program.model.mem.MemoryAccessException;
+import ghidra.util.Msg;
+
+public class GNUExternalDisassembler implements ExternalDisassembler {
+
+	private static final String UNSUPPORTED = "UNSUPPORTED";
+
+	// magic values for gdis that direct it to read bytes from stdin
+	private static final String READ_FROM_STDIN_PARAMETER = "stdin";
+	private static final String SEPARATOR_CHARACTER = "\n";
+	private static final String ADDRESS_OUT_OF_BOUNDS = "is out of bounds.";
+	private static final String ENDING_STRING = "EOF";
+	private static final int NUM_BYTES = 32;
+
+	private static final String MAP_FILENAME = "LanguageMap.txt";
+	private static final String GNU_DISASSEMBLER_MODULE_NAME = "GnuDisassembler";
+	private static final String GDIS_EXE =
+		Platform.CURRENT_PLATFORM.getOperatingSystem() == OperatingSystem.WINDOWS ? "gdis.exe"
+				: "gdis";
+
+	private static HashMap<String, File> languageGdisMap;
+	private static File defaultGdisExecFile;
+	private static File gdisDataDirectory;
+
+	private static Map<LanguageID, GdisConfig> configCache = new HashMap<>();
+	private static boolean missingExtensionReported;
+
+	private GdisConfig currentConfig;
+	private boolean hadFailure;
+
+	private Process disassemblerProcess;
+	private BufferedReader buffReader;
+	private OutputStreamWriter outputWriter;
+
+//	private LanguageID lastLanguageWarnedAbout;
+
+	public GNUExternalDisassembler() throws Exception {
+		initialize();
+	}
+
+	@Override
+	public void destroy() {
+		if (disassemblerProcess != null) {
+			disassemblerProcess.destroy();
+		}
+	}
+
+	@Override
+	public boolean isSupportedLanguage(Language language) {
+		GdisConfig gdisConfig = checkLanguage(language);
+		return gdisConfig != null && gdisConfig.architecture != UNSUPPORTED;
+	}
+
+	private static void reportMultipleMappings(Language language) {
+		List<String> externalNames = language.getLanguageDescription().getExternalNames("gnu");
+		if (externalNames != null && externalNames.size() > 1) {
+			LanguageID currentLanguageID = language.getLanguageID();
+			StringBuilder sb = new StringBuilder();
+			boolean prependSeparator = false;
+			for (String name : externalNames) {
+				if (prependSeparator)
+					sb.append(", ");
+				sb.append(name);
+				prependSeparator = true;
+			}
+			Msg.warn(GNUExternalDisassembler.class,
+				"Language " + currentLanguageID + " illegally maps to multiple (" +
+					externalNames.size() + ") external gnu names: " + sb.toString() +
+					".  The first external name will be used.");
+		}
+	}
+
+	private static class GdisConfig {
+
+		String languageId;
+		boolean isBigEndian;
+
+		String architecture;
+		String machineId;
+		File gdisExecFile;
+		boolean usingDefault;
+
+		GdisConfig(Language language, boolean isBigEndian) {
+
+			this.languageId = language.getLanguageID().toString();
+			this.isBigEndian = isBigEndian;
+
+			List<String> architectures = language.getLanguageDescription().getExternalNames("gnu");
+			//get first non-null
+			if (architectures != null && architectures.size() > 0) {
+				architecture = architectures.get(0);
+				if (architectures.size() > 1) {
+					reportMultipleMappings(language);
+				}
+			}
+			if (architecture == null) {
+				architecture = UNSUPPORTED;
+				return;
+			}
+
+			machineId = "0x0";
+
+			// handle numeric entry which combines architecture and machineId
+			if (architecture.startsWith("0x")) {
+				String[] parts = architecture.split(":");
+				architecture = parts[0];
+				machineId = parts[1];
+			}
+
+			gdisExecFile = languageGdisMap.get(languageId);
+			if (gdisExecFile == null) {
+				gdisExecFile = defaultGdisExecFile;
+				usingDefault = true;
+			}
+		}
+
+		GdisConfig(Language lang) {
+			this(lang, lang.isBigEndian());
+		}
+
+		@Override
+		public boolean equals(Object obj) {
+			if (!(obj instanceof GdisConfig)) {
+				return false;
+			}
+			// assume config will match for a given language
+			return languageId.equals(((GdisConfig) obj).languageId);
+		}
+
+		@Override
+		public int hashCode() {
+			return languageId.hashCode();
+		}
+	}
+
+	private static synchronized GdisConfig checkLanguage(Language lang) {
+		LanguageID languageId = lang.getLanguageID();
+		if (configCache.containsKey(languageId)) {
+			return configCache.get(languageId);
+		}
+		GdisConfig config = new GdisConfig(lang);
+		if (config.architecture == UNSUPPORTED) {
+			Msg.warn(GNUExternalDisassembler.class,
+				"Language not supported (ldefs 'gnu' map entry not found): " + languageId);
+		}
+		else if (gdisDataDirectory == null) {
+			config = null;
+			if (!missingExtensionReported) {
+				missingExtensionReported = true;
+				Msg.showError(GNUExternalDisassembler.class, null, "GNU Disassembler Not Found",
+					"External Disassembler extension module not installed: " +
+						GNU_DISASSEMBLER_MODULE_NAME);
+			}
+		}
+		else if (config.gdisExecFile == null) {
+			boolean usingDefault = config.usingDefault;
+			config = null;
+			if (usingDefault) {
+				if (!missingExtensionReported) {
+					missingExtensionReported = true;
+					Msg.showError(GNUExternalDisassembler.class, null, "GNU Disassembler Not Found",
+						"External GNU Disassembler not found (requires install and build of " +
+							GNU_DISASSEMBLER_MODULE_NAME + " extension): " + GDIS_EXE);
+				}
+			}
+			else {
+				Msg.showError(GNUExternalDisassembler.class, null, "GNU Disassembler Not Found",
+					"External GNU Disassembler not found for language (" + lang.getLanguageID() +
+						", see LanguageMap.txt)");
+			}
+		}
+		configCache.put(languageId, config);
+		return config;
+	}
+
+	private int pow2(int pow) {
+		int r = 1;
+		for (int i = 1; i <= pow; i++) {
+			r *= 2;
+		}
+		return r;
+	}
+
+	/**
+	 * Get detailed instruction list for a block of instructions.
+	 * 
+	 * @param lang
+	 *            processor language (corresponding LanguageID must be defined
+	 *            within LanguageMap.txt)
+	 * @param blockAddr
+	 *            start of block ( must be true: (offset & -(2^blockSizeFactor)
+	 *            == offset)
+	 * @param blockSizeFactor
+	 *            the block size factor where blockSize = 2^blockSizeFactor
+	 *            (must be > 0)
+	 * @param byteProvider
+	 *            provider for block of bytes to be disassembled starting at
+	 *            offset 0
+	 * @return list of instructions or null if language not supported by GNU
+	 *         Disassembler
+	 * @throws Exception
+	 */
+	public List<GnuDisassembledInstruction> getBlockDisassembly(Language lang, Address blockAddr,
+			int blockSizeFactor, ByteProvider byteProvider) throws Exception {
+
+		GdisConfig gdisConfig = checkLanguage(lang);
+		if (gdisConfig == null || gdisConfig.architecture == UNSUPPORTED) {
+			return null;
+		}
+
+		if (blockSizeFactor < 0 || blockSizeFactor > 8) {
+			throw new IllegalArgumentException("blockSizeFactor must be > 0 and <= 8");
+		}
+		int blockSize = pow2(blockSizeFactor);
+
+		if ((blockAddr.getOffset() & -blockSize) != blockAddr.getOffset()) {
+			throw new IllegalArgumentException("Address must be block aligned");
+		}
+
+		long addressOffset = blockAddr.getAddressableWordOffset();
+		String address = "0x" + Long.toHexString(addressOffset);
+
+		// for aligned languages, don't try on non-aligned block addr/size.
+		int alignment = lang.getInstructionAlignment();
+		if (blockAddr.getOffset() % alignment != 0) {
+			throw new IllegalArgumentException(
+				"Address does not satisfy instruction alignment constraint: " + alignment);
+		}
+
+		String bytes = getBytes(byteProvider, blockSize);
+
+		return runDisassembler(gdisConfig, address, bytes);
+	}
+
+	public List<GnuDisassembledInstruction> getBlockDisassembly(Program program, Address addr,
+			int blockSizeFactor) throws Exception {
+
+		if (blockSizeFactor < 0 || blockSizeFactor > 8) {
+			throw new IllegalArgumentException("blockSizeFactor must be > 0 and <= 8");
+		}
+		int blockSize = pow2(blockSizeFactor);
+
+		Address blockAddr = addr.getNewAddress(addr.getOffset() & -blockSize); // block
+																				// aligned
+																				// address
+
+		return getBlockDisassembly(program.getLanguage(), blockAddr, blockSizeFactor,
+			new MemoryByteProvider(program.getMemory(), blockAddr));
+	}
+
+	@Override
+	public String getDisassembly(CodeUnit cu) throws Exception {
+
+		GdisConfig gdisConfig = checkLanguage(cu.getProgram().getLanguage());
+		if (gdisConfig == null || gdisConfig.architecture == UNSUPPORTED) {
+			return null;
+		}
+
+		long addressOffset = cu.getAddress().getAddressableWordOffset();
+		String address = "0x" + Long.toHexString(addressOffset);
+
+		// for aligned languages, don't try on non-aligned locations.
+		if (cu.getMinAddress().getOffset() %
+			cu.getProgram().getLanguage().getInstructionAlignment() != 0) {
+			return "";
+		}
+
+		String bytes = getBytes(cu, NUM_BYTES);
+		if (bytes == null) {
+			return "";
+		}
+
+		List<GnuDisassembledInstruction> disassembly = runDisassembler(gdisConfig, address, bytes);
+
+		if (disassembly == null || disassembly.size() == 0 || disassembly.get(0) == null) {
+			return "(bad)";
+		}
+		return disassembly.get(0).toString();
+	}
+
+	// disassembler without having to have a code unit
+	@Override
+	public String getDisassemblyOfBytes(Language language, boolean isBigEndian, long addressOffset,
+			byte[] bytes) throws Exception {
+
+		GdisConfig gdisConfig = new GdisConfig(language, isBigEndian);
+		if (gdisConfig.architecture == UNSUPPORTED || gdisConfig.gdisExecFile == null) {
+			return null;
+		}
+
+		String bytesString = converBytesToString(bytes);
+
+		String address = "0x" + Long.toHexString(addressOffset);
+
+		List<GnuDisassembledInstruction> disassembly =
+			runDisassembler(gdisConfig, address, bytesString);
+
+		if (disassembly == null || disassembly.isEmpty() || disassembly.get(0) == null) {
+			return "(bad)";
+		}
+		return disassembly.get(0).toString();
+	}
+
+	private String converBytesToString(byte[] bytes) {
+		String byteString = null;
+		for (byte thisByte : bytes) {
+			String thisByteString = Integer.toHexString(thisByte);
+			if (thisByteString.length() == 1)
+				thisByteString = "0" + thisByteString; // pad single digits
+			if (thisByteString.length() > 2)
+				thisByteString = thisByteString.substring(thisByteString.length() - 2);
+			// append this byte's hex string to the larger word length string
+			byteString = byteString + thisByteString;
+		}
+
+		return byteString;
+	}
+
+	private boolean setupDisassembler(GdisConfig gdisConfig) {
+
+		if (disassemblerProcess != null) {
+			disassemblerProcess.destroy();
+			disassemblerProcess = null;
+			outputWriter = null;
+			buffReader = null;
+		}
+
+		this.currentConfig = gdisConfig;
+		hadFailure = false;
+
+		String endianString = gdisConfig.isBigEndian ? "0x00" : "0x01"; // 0x0 is big, 0x1 is little endian
+
+		// NOTE: valid target must be specified but has no effect on results
+		String cmds[] = { gdisConfig.gdisExecFile.getAbsolutePath(), "pef", gdisConfig.architecture,
+			gdisConfig.machineId, endianString, "0x0",
+			gdisDataDirectory.getAbsolutePath() + File.separator,
+			GNUExternalDisassembler.READ_FROM_STDIN_PARAMETER };
+
+		StringBuilder buf = new StringBuilder();
+		for (String str : cmds) {
+			boolean addQuotes = str.indexOf(' ') >= 0;
+			if (addQuotes) {
+				buf.append('\"');
+			}
+			buf.append(str);
+			if (addQuotes) {
+				buf.append('\"');
+			}
+			buf.append(' ');
+		}
+		Msg.debug(this, "Starting gdis: " + buf.toString());
+
+		try {
+			Runtime rt = Runtime.getRuntime();
+			disassemblerProcess = rt.exec(cmds, null, gdisConfig.gdisExecFile.getParentFile());
+		}
+		catch (IOException e) {
+			buf = new StringBuilder();
+			for (String arg : cmds) {
+				buf.append("\"");
+				buf.append(arg);
+				buf.append("\" ");
+			}
+			Msg.debug(this, "GNU Disassembly setup failed, exec command: " + buf);
+			Msg.showError(this, null, "GNU Disassembler Error",
+				"Disassembler setup execution error: " + e.getMessage(), e);
+			hadFailure = true;
+			return false;
+		}
+		return true;
+	}
+
+	private List<GnuDisassembledInstruction> runDisassembler(GdisConfig gdisConfig,
+			String addrString, String bytes) throws IOException {
+
+		// if this is the first time running the disassembler process, or a
+		// parameter has changed (notably, not the address--we pass that in
+		// every time)
+		boolean sameConfig = gdisConfig.equals(currentConfig);
+		if (sameConfig && hadFailure) {
+			return null;
+		}
+
+		if (disassemblerProcess == null || !sameConfig) {
+
+			if (!setupDisassembler(gdisConfig))
+				return null;
+
+			outputWriter = new OutputStreamWriter(disassemblerProcess.getOutputStream());
+
+			InputStreamReader inStreamReader =
+				new InputStreamReader(disassemblerProcess.getInputStream());
+			buffReader = new BufferedReader(inStreamReader);
+
+			ExternalStreamHandler errorHandler =
+				new ExternalStreamHandler(disassemblerProcess.getErrorStream());
+			errorHandler.start();
+		}
+
+		if (!disassemblerProcess.isAlive()) {
+			return null; // if process previously died return nothing - quickly
+		}
+
+		String disassemblyRequest = addrString + SEPARATOR_CHARACTER + bytes + SEPARATOR_CHARACTER;
+		try {
+			outputWriter.write(disassemblyRequest);
+			outputWriter.flush();
+			return getDisassembledInstruction();
+		}
+		catch (IOException e) {
+			// force a restart of the disassembler on next call to this function
+			// TODO: Should we not do this to avoid repeated failure and severe slowdown?
+			// User must exit or switch configs/programs to retry after failure
+			//disassemblerProcess.destroy();
+			//disassemblerProcess = null; // assumes process exit
+			Msg.error(this, "Last gdis request failed: " + disassemblyRequest);
+			throw new IOException("gdis execution error", e);
+		}
+	}
+
+	private List<GnuDisassembledInstruction> getDisassembledInstruction() throws IOException {
+
+		List<GnuDisassembledInstruction> results = new ArrayList<>();
+		String instructionLine;
+
+		boolean error = false;
+		do {
+			instructionLine = buffReader.readLine();
+			if (!error && instructionLine != null && !instructionLine.equals(ENDING_STRING) &&
+				(instructionLine.indexOf(ADDRESS_OUT_OF_BOUNDS) < 0) &&
+				!instructionLine.startsWith("Usage:") && !instructionLine.startsWith("Debug:")) {
+
+				String instructionMetadataLine = buffReader.readLine();
+				if (!instructionMetadataLine.startsWith("Info: ")) {
+					// TODO, throw an "ExternalDisassemblerInterfaceException"
+					// or some such
+					error = true; // still need to consume remainder of input
+					continue;
+				}
+				String[] metadata = instructionMetadataLine.substring("Info: ".length()).split(",");
+				results.add(new GnuDisassembledInstruction(instructionLine.replace('\t', ' '),
+					Integer.parseInt(metadata[0]), "1".equals(metadata[1]),
+					Integer.parseInt(metadata[2]), Integer.parseInt(metadata[3]),
+					Integer.parseInt(metadata[4])));
+			}
+		}
+		while (instructionLine != null && !instructionLine.equals(ENDING_STRING));
+
+		if (!disassemblerProcess.isAlive()) {
+			throw new IOException("GNU disassembler process died unexpectedly.");
+		}
+
+		if (error) {
+			return null;
+		}
+
+		return results;
+	}
+
+	private String getBytes(ByteProvider byteProvider, int size) throws IOException {
+		StringBuffer byteString = new StringBuffer();
+		for (int i = 0; i < size; i++) {
+			byteString.append(formatHexString(byteProvider.readByte(i)));
+		}
+		return byteString.toString();
+	}
+
+	private String getBytes(MemBuffer mem, int size) {
+		StringBuffer byteString = new StringBuffer();
+		for (int i = 0; i < size; i++) {
+			try {
+				byteString.append(formatHexString(mem.getByte(i)));
+			}
+			catch (AddressOutOfBoundsException e) {
+				break;
+			}
+			catch (MemoryAccessException e) {
+				if (i > 0) {
+					break;
+				}
+				return null;
+			}
+		}
+		return byteString.toString();
+	}
+
+	private String formatHexString(byte byteToFix) {
+		String byteString = "";
+		String singleByte = "";
+		if (byteToFix < 0) {
+			singleByte = Integer.toHexString(byteToFix + 256);
+		}
+		else {
+			singleByte = Integer.toHexString(byteToFix);
+		}
+		if (singleByte.length() == 1) {
+			byteString += '0';
+		}
+		byteString += singleByte;
+		return byteString;
+	}
+
+	private static synchronized void initialize() throws Exception {
+		if (languageGdisMap != null) {
+			return;
+		}
+
+		languageGdisMap = new HashMap<>();
+
+		try {
+			// sample elf files located in data directory
+			ResourceFile dataDir =
+				Application.getModuleSubDirectory(GNU_DISASSEMBLER_MODULE_NAME, "data");
+			gdisDataDirectory = dataDir.getFile(false);
+			defaultGdisExecFile = Application.getOSFile(GNU_DISASSEMBLER_MODULE_NAME, GDIS_EXE);
+		}
+		catch (FileNotFoundException e) {
+			// ignore
+		}
+
+		if (gdisDataDirectory == null) {
+			Msg.warn(GNUExternalDisassembler.class,
+				"Use of External GNU Disassembler requires installation of extension: " +
+					GNU_DISASSEMBLER_MODULE_NAME);
+		}
+
+		initializeMaps();
+
+		if (defaultGdisExecFile == null || !defaultGdisExecFile.canExecute()) {
+			Msg.warn(GNUExternalDisassembler.class,
+				"External GNU Disassembler not found: " + GDIS_EXE);
+			defaultGdisExecFile = null;
+		}
+	}
+
+	/**
+	 * Process all language maps defined by any module.  Any alternate external disassembler
+	 * executable will be looked for within the os directory of the contributing module or 
+	 * within the gdis module
+	 * @throws Exception
+	 */
+	private static void initializeMaps() {
+		for (ResourceFile file : Application.findFilesByExtensionInApplication(".txt")) {
+			if (MAP_FILENAME.equals(file.getName())) {
+				initializeMap(file);
+			}
+		}
+	}
+
+	private static void initializeMap(ResourceFile mapFile) {
+
+		ResourceFile moduleForResourceFile = Application.getModuleContainingResourceFile(mapFile);
+		if (moduleForResourceFile == null) {
+			Msg.error(GNUExternalDisassembler.class,
+				"Failed to identify module containing file: " + mapFile);
+			return;
+		}
+
+		Reader mapFileReader = null;
+		try {
+			mapFileReader = new InputStreamReader(mapFile.getInputStream());
+			BufferedReader reader = new BufferedReader(mapFileReader);
+			String line = null;
+			while ((line = reader.readLine()) != null) {
+				if (line.startsWith("//") || line.isEmpty()) {
+					continue;
+				}
+				String[] parts = line.split("#");
+				if (parts.length > 1) {
+
+					//System.out.println("found: " + parts[0] + " . " + parts[1]);
+
+					// TODO: should probably store exe module/name in map and defer search 
+					// until GdisConfig is created.  This will allow us to complain about a 
+					// missing exe when it is needed/used.
+
+					String gdisExe = parts[1];
+					if (Platform.CURRENT_PLATFORM.getOperatingSystem() == OperatingSystem.WINDOWS) {
+						gdisExe = gdisExe + ".exe";
+					}
+					try {
+						File customGdisExecFile;
+						try {
+							customGdisExecFile =
+								Application.getOSFile(moduleForResourceFile.getName(), gdisExe);
+						}
+						catch (FileNotFoundException e) {
+							customGdisExecFile = Application.getOSFile(gdisExe);
+						}
+						languageGdisMap.put(parts[0], customGdisExecFile);
+					}
+					catch (FileNotFoundException e) {
+						Msg.error(GNUExternalDisassembler.class,
+							"External disassembler not found (" + parts[0] + "): " + gdisExe);
+					}
+
+				}
+			}
+		}
+		catch (Exception e) {
+			Msg.error(GNUExternalDisassembler.class,
+				"Error reading from language mapping file: " + mapFile, e);
+		}
+		finally {
+			if (mapFileReader != null) {
+				try {
+					mapFileReader.close();
+				}
+				catch (Exception e) {
+					// we tried
+				}
+			}
+		}
+	}
+}
--- a/Ghidra/Extensions/SleighDevTools/src/main/java/ghidra/app/util/disassemble/GnuDisassembledInstruction.java
+++ b/Ghidra/Extensions/SleighDevTools/src/main/java/ghidra/app/util/disassemble/GnuDisassembledInstruction.java
@ -0,0 +1,82 @@
+/* ###
+ * IP: GHIDRA
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package ghidra.app.util.disassemble;
+
+/**
+ * Holds the disassembled string of an instruction and the extra information
+ * (type, number of bytes disassembled to produce instruction, etc.) of bytes
+ * disassembled by the GNU disassembler.
+ */
+public class GnuDisassembledInstruction {
+
+	private final String instruction;
+	private final int bytesInInstruction;
+
+	private final int branchDelayInstructions;
+	private final int dataSize;
+	private final DIS_INSN_TYPE instructionType;
+	private final boolean isValid;
+
+	// from GNU binutils include/dis-asm.h
+	enum DIS_INSN_TYPE {
+		dis_noninsn, /* Not a valid instruction. */
+		dis_nonbranch, /* Not a branch instruction. */
+		dis_branch, /* Unconditional branch. */
+		dis_condbranch, /* Conditional branch. */
+		dis_jsr, /* Jump to subroutine. */
+		dis_condjsr, /* Conditional jump to subroutine. */
+		dis_dref, /* Data reference instruction. */
+		dis_dref2 /* Two data references in instruction. */
+	}
+
+	public GnuDisassembledInstruction(String instructionLine, int bytesInInstruction,
+			boolean isValid, int branchDelayInstructions, int dataSize, int disInsnTypeOrdinal) {
+
+		this.instruction = instructionLine.trim();
+		this.bytesInInstruction = bytesInInstruction;
+
+		this.isValid = isValid;
+		this.branchDelayInstructions = branchDelayInstructions;
+		this.dataSize = dataSize;
+		this.instructionType = DIS_INSN_TYPE.values()[disInsnTypeOrdinal];
+	}
+
+	public int getNumberOfBytesInInstruction() {
+		return bytesInInstruction;
+	}
+
+	public DIS_INSN_TYPE getInstructionType() {
+		return isValid ? instructionType : null;
+	}
+
+	public int getBranchDelayInstructions() {
+		return isValid ? branchDelayInstructions : null;
+	}
+
+	public int getDataSize() {
+		return isValid ? dataSize : null;
+	}
+
+	public String getInstruction() {
+		return instruction;
+	}
+
+	@Override
+	public String toString() {
+		return instruction;
+	}
+
+}
--- a/Ghidra/Framework/Generic/src/main/java/ghidra/util/classfinder/ClassSearcher.java
+++ b/Ghidra/Framework/Generic/src/main/java/ghidra/util/classfinder/ClassSearcher.java
@ -142,20 +142,22 @@ public class ClassSearcher {
 			}
 			catch (InstantiationException e) {
 				Msg.showError(ClassSearcher.class, null, "Error Instantiating Extension Point",
-					"Error creating class " + clazz.getName() + " for extension " + c.getName() +
+					"Error creating class " + clazz.getSimpleName() + " for extension " +
+						c.getName() +
 						".  Discovered class is not a concrete implementation or does not " +
 						"have a nullary constructor!",
 					e);
 			}
 			catch (IllegalAccessException e) {
 				Msg.showError(ClassSearcher.class, null, "Error Instantiating Extension Point",
-					"Error creating class " + clazz.getName() + " for extension " + c.getName() +
+					"Error creating class " + clazz.getSimpleName() + " for extension " +
+						c.getName() +
 						".  Discovered class does not have a public, default constructor!",
 					e);
 			}
 			catch (SecurityException e) {
-				String message = "Error creating class " + clazz.getName() + " for extension " +
-					c.getName() + ".  Security Exception!";
+				String message = "Error creating class " + clazz.getSimpleName() +
+					" for extension " + c.getName() + ".  Security Exception!";
 				Msg.showError(ClassSearcher.class, null, "Error Instantiating Extension Point",
 					message, e);

@ -163,7 +165,7 @@ public class ClassSearcher {
 			}
 			catch (Exception e) {
 				Msg.showError(ClassSearcher.class, null, "Error Creating Extension Point",
-					"Error creating class " + clazz.getName() +
+					"Error creating class " + clazz.getSimpleName() +
 						" when creating extension points for " + c.getName(),
 					e);
 			}
--- a/Ghidra/Framework/Project/src/main/java/ghidra/framework/plugintool/dialog/ExtensionDetailsPanel.java
+++ b/Ghidra/Framework/Project/src/main/java/ghidra/framework/plugintool/dialog/ExtensionDetailsPanel.java
@ -36,6 +36,7 @@ class ExtensionDetailsPanel extends AbstractDetailsPanel {
 	private static SimpleAttributeSet authorAttrSet;
 	private static SimpleAttributeSet createdOnAttrSet;
 	private static SimpleAttributeSet versionAttrSet;
+	private static SimpleAttributeSet pathAttrSet;

 	ExtensionDetailsPanel(ExtensionTablePanel tablePanel) {
 		super();
@ -105,6 +106,12 @@ class ExtensionDetailsPanel extends AbstractDetailsPanel {
 			insertRowValue(buffer, version, versionAttrSet);
 		}

+		String installPath = details.getInstallPath();
+		if (installPath != null) {
+			insertRowTitle(buffer, "Install Path");
+			insertRowValue(buffer, installPath, pathAttrSet);
+		}
+
 		buffer.append("</TABLE>");

 		textLabel.setText(buffer.toString());
@ -119,5 +126,6 @@ class ExtensionDetailsPanel extends AbstractDetailsPanel {
 		authorAttrSet = createAttributeSet(Color.BLUE);
 		createdOnAttrSet = createAttributeSet(Color.BLUE);
 		versionAttrSet = createAttributeSet(Color.BLUE);
+		pathAttrSet = createAttributeSet(Color.BLUE);
 	}
 }
--- a/gradle/certification.manifest
+++ b/gradle/certification.manifest
@ -1,5 +1,6 @@
 ##VERSION: 2.0
 README.txt||GHIDRA||||END|
+distributableGPLExtension.gradle||GHIDRA||||END|
 distributableGPLModule.gradle||GHIDRA||||END|
 distributableGhidraExtension.gradle||GHIDRA||||END|
 distributableGhidraModule.gradle||GHIDRA||||END|
--- a/gradle/distributableGPLExtension.gradle
+++ b/gradle/distributableGPLExtension.gradle
@ -0,0 +1,26 @@
+/*****************************************************************************************
+	This file is a "mix-in" gradle script that individual gradle projects should include if it 
+	has content that should be included in a distribution as an extension. Including this
+	will cause all the standard module files to be included in the build as a sub-zipped extension.
+	
+	A gradle project can add itself as an extension to the build distribution by adding the
+	following to its build.gradle file:
+
+		apply from: "$rootProject.projectDir/gradle/support/distributableGhidraModule.gradle"
+*****************************************************************************************/
+
+apply from: "$rootProject.projectDir/gradle/distributableGhidraExtension.gradle"
+
+zipExtensions {
+	def p = this.project
+	from (p.projectDir) {
+		exclude 'build/**'
+		exclude 'certification.manifest'
+		exclude "*.project"
+		exclude "*.classpath"
+		exclude '.settings/**'
+		exclude 'bin/**'
+		
+		into { getBaseProjectName(p) }
+	}
+}
--- a/gradle/root/eclipse.gradle
+++ b/gradle/root/eclipse.gradle
@ -102,7 +102,7 @@ eclipse {
       type = 'EXCLUDE_ALL'
       matcher {
         id = 'org.eclipse.ui.ide.multiFilter'
-         arguments = '1.0-name-matches-false-true-CabExtract'
+         arguments = '1.0-name-matches-false-false-GhidraDocs'
       }
     }
     resourceFilter {
@ -110,7 +110,7 @@ eclipse {
       type = 'EXCLUDE_ALL'
       matcher {
         id = 'org.eclipse.ui.ide.multiFilter'
-         arguments = '1.0-name-matches-false-false-GhidraDocs'
+         arguments = '1.0-name-matches-false-true-CabExtract'
       }
     }      
     resourceFilter {
@ -129,6 +129,14 @@ eclipse {
         arguments = '1.0-name-matches-false-false-DemanglerGnu'
       }
     }
+     resourceFilter {
+       appliesTo = 'FILES_AND_FOLDERS'
+       type = 'EXCLUDE_ALL'
+       matcher {
+         id = 'org.eclipse.ui.ide.multiFilter'
+         arguments = '1.0-name-matches-false-true-GnuDisassembler'
+       }
+     }    
   }
 }