change armSoftFloat condition in ELFAnalyser

CHANGES.md

@@ -12,7 +12,7 @@ Bug Fixes
 ---------
 * [#652](https://github.com/java-native-access/jna/issues/652): Dead Lock in class initialization - [@matthiasblaesing](https://github.com/matthiasblaesing).
 * [#843](https://github.com/java-native-access/jna/pull/843): Correctly bind `com.sun.jna.platform.win32.SecBufferDesc` and add convenience binding as `com.sun.jna.platform.win32.SspiUtil.ManagedSecBufferDesc`. Bind SSPI functions `InitializeSecurityContext`, `AcceptSecurityContext`, `QueryCredentialsAttributes`, `QuerySecurityPackageInfo`, `EncryptMessage`, `DecryptMessage`, `MakeSignature`, `VerifySignature` in `com.sun.jna.platform.win32.Secur32` - [@matthiasblaesing](https://github.com/matthiasblaesing).
-
+* [#863](https://github.com/java-native-access/jna/pull/863): change armSoftFloat condition in ELFAnalyser - [@kunkun26](https://github.com/kunkun26).
 
 Breaking Changes
 ----------------

src/com/sun/jna/ELFAnalyser.java

@@ -133,8 +133,8 @@ private void runDetection() throws IOException {
 
         if(arm) {
             int flags = headerData.getInt(_64Bit ? 0x30 : 0x24);
-            armSoftFloat = (flags & EF_ARM_ABI_FLOAT_SOFT) == EF_ARM_ABI_FLOAT_SOFT;
             armHardFloat = (flags & EF_ARM_ABI_FLOAT_HARD) == EF_ARM_ABI_FLOAT_HARD;
+            armSoftFloat = !armHardFloat;
         }
     }
 }

test/com/sun/jna/ELFAnalyserTest.java

@@ -1,11 +1,10 @@
 
 package com.sun.jna;
 
-import java.io.File;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
+import java.io.*;
+import java.nio.file.CopyOption;
+import java.nio.file.Files;
+import java.nio.file.StandardCopyOption;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipFile;
 import org.junit.AfterClass;
@@ -21,6 +20,7 @@ public class ELFAnalyserTest {
     private static File testResources = new File("build/test-resources");
     private static File win32Lib = new File(testResources, "win32-x86-64.dll");
     private static File linuxArmelLib = new File(testResources, "linux-armel.so");
+    private static File linuxArmelNoflagLib = new File(testResources, "linux-armel-noflag.so");
     private static File linuxArmhfLib = new File(testResources, "linux-armhf.so");
     private static File linuxAmd64Lib = new File(testResources, "linux-amd64.so");
 
@@ -37,6 +37,7 @@ public static void initClass() throws IOException {
         extractFileFromZip(linuxArmelZip, "libjnidispatch.so", linuxArmelLib);
         extractFileFromZip(linuxArmhfZip, "libjnidispatch.so", linuxArmhfLib);
         extractFileFromZip(linuxAmd64Zip, "libjnidispatch.so", linuxAmd64Lib);
+        makeLinuxArmelNoflagLib(linuxArmelLib, linuxArmelNoflagLib);
     }
 
     @Test
@@ -72,13 +73,24 @@ public void testArmel() throws IOException {
         assertTrue(ahfd.isArmSoftFloat());
         assertFalse(ahfd.isArmHardFloat());
     }
+
+    @Test
+    public void testArmelNoflag() throws IOException {
+        ELFAnalyser ahfd = ELFAnalyser.analyse(linuxArmelNoflagLib.getAbsolutePath());
+        assertTrue(ahfd.isELF());
+        assertTrue(ahfd.isArm());
+        assertFalse(ahfd.is64Bit());
+        assertTrue(ahfd.isArmSoftFloat());
+        assertFalse(ahfd.isArmHardFloat());
+    }
 
     @AfterClass
     public static void afterClass() throws IOException {
         linuxAmd64Lib.delete();
         linuxArmhfLib.delete();
         linuxArmelLib.delete();
         win32Lib.delete();
+        linuxArmelNoflagLib.delete();
         testResources.delete();
     }
 
@@ -104,5 +116,18 @@ private static void extractFileFromZip(File zipTarget, String zipEntryName, File
             zip.close();
         }
     }
+
+    // The e_flags for elf arm binaries begin at an offset of 0x24 bytes.
+    // The procedure call standard is coded on the second byte.
+    private static void makeLinuxArmelNoflagLib(File sourceFile, File outputFile) throws IOException {
+        final int POS_ABI_FLOAT_BIT = (byte) 0x25;
+        Files.copy(sourceFile.toPath(), outputFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
+        RandomAccessFile out = new RandomAccessFile(outputFile, "rw");
+
+        out.seek(POS_ABI_FLOAT_BIT);
+        out.write(0);
+
+        out.close();
+    }
 }