LibVlcUtil: add x86_64 and aarch64 support

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

vlc-android/src/org/videolan/libvlc/LibVlcUtil.java

@@ -121,17 +121,27 @@ public class LibVlcUtil {
             } catch (Exception e) { }
         }
 
-        Log.i(TAG, "machine = " + (elf.e_machine == EM_ARM ? "arm" : elf.e_machine == EM_386 ? "x86" : "mips"));
+        final boolean elfHasX86 = elf.e_machine == EM_386 || elf.e_machine == EM_X86_64;
+        final boolean elfHasArm = elf.e_machine == EM_ARM || elf.e_machine == EM_AARCH64;
+        final boolean elfHasMips = elf.e_machine == EM_MIPS;
+        final boolean elfIs64bits = elf.is64bits;
+
+        Log.i(TAG, "machine = " + (elfHasArm ? "arm" : elfHasX86 ? "x86" : "mips") + ", " +
+                                  (elfIs64bits ? "64bits" : "32bits"));
         Log.i(TAG, "arch = " + elf.att_arch);
         Log.i(TAG, "fpu = " + elf.att_fpu);
         boolean hasNeon = false, hasFpu = false, hasArmV6 = false,
-                hasArmV7 = false, hasMips = false, hasX86 = false;
+                hasArmV7 = false, hasMips = false, hasX86 = false, is64bits = false;
         float bogoMIPS = -1;
         int processors = 0;
 
         if(CPU_ABI.equals("x86") ||
            CPU_ABI2.equals("x86")) {
             hasX86 = true;
+        } else if(CPU_ABI.equals("x86_64") ||
+                  CPU_ABI2.equals("x86_64")) {
+            hasX86 = true;
+            is64bits = true;
         } else if(CPU_ABI.equals("armeabi-v7a") ||
                   CPU_ABI2.equals("armeabi-v7a")) {
             hasArmV7 = true;
@@ -139,6 +149,12 @@ public class LibVlcUtil {
         } else if(CPU_ABI.equals("armeabi") ||
                   CPU_ABI2.equals("armeabi")) {
             hasArmV6 = true;
+        } else if(CPU_ABI.equals("arm64-v8a") ||
+                CPU_ABI2.equals("arm64-v8a")) {
+            hasNeon = true;
+            hasArmV6 = true;
+            hasArmV7 = true;
+            is64bits = true;
         }
 
         try {
@@ -192,21 +208,21 @@ public class LibVlcUtil {
             processors = 1; // possibly borked cpuinfo?
 
         // Enforce proper architecture to prevent problems
-        if(elf.e_machine == EM_386 && !hasX86) {
+        if(elfHasX86 && !hasX86) {
             errorMsg = "x86 build on non-x86 device";
             isCompatible = false;
             return false;
-        } else if(elf.e_machine == EM_ARM && hasX86) {
+        } else if(elfHasArm && hasX86) {
             errorMsg = "ARM build on x86 device";
             isCompatible = false;
             return false;
         }
 
-        if(elf.e_machine == EM_MIPS && !hasMips) {
+        if(elfHasMips && !hasMips) {
             errorMsg = "MIPS build on non-MIPS device";
             isCompatible = false;
             return false;
-        } else if(elf.e_machine == EM_ARM && hasMips) {
+        } else if(elfHasArm && hasMips) {
             errorMsg = "ARM build on MIPS device";
             isCompatible = false;
             return false;
@@ -228,6 +244,10 @@ public class LibVlcUtil {
                 return false;
             }
         }
+        if (elfIs64bits && !is64bits) {
+            errorMsg = "64bits build on 32bits device";
+            isCompatible = false;
+        }
 
         float frequency = -1;
         try {
@@ -256,6 +276,7 @@ public class LibVlcUtil {
         machineSpecs.hasMips = hasMips;
         machineSpecs.hasNeon = hasNeon;
         machineSpecs.hasX86 = hasX86;
+        machineSpecs.is64bits = is64bits;
         machineSpecs.bogoMIPS = bogoMIPS;
         machineSpecs.processors = processors;
         machineSpecs.frequency = frequency;
@@ -273,6 +294,7 @@ public class LibVlcUtil {
         public boolean hasArmV7;
         public boolean hasMips;
         public boolean hasX86;
+        public boolean is64bits;
         public float bogoMIPS;
         public int processors;
         public float frequency; /* in MHz */
@@ -281,11 +303,14 @@ public class LibVlcUtil {
     private static final int EM_386 = 3;
     private static final int EM_MIPS = 8;
     private static final int EM_ARM = 40;
+    private static final int EM_X86_64 = 62;
+    private static final int EM_AARCH64 = 183;
     private static final int ELF_HEADER_SIZE = 52;
     private static final int SECTION_HEADER_SIZE = 40;
     private static final int SHT_ARM_ATTRIBUTES = 0x70000003;
     private static class ElfData {
         ByteOrder order;
+        boolean is64bits;
         int e_machine;
         int e_shoff;
         int e_shnum;
@@ -317,6 +342,8 @@ public class LibVlcUtil {
             switch (elf.e_machine) {
                 case EM_386:
                 case EM_MIPS:
+                case EM_X86_64:
+                case EM_AARCH64:
                     return elf;
                 case EM_ARM:
                     in.close();
@@ -354,10 +381,12 @@ public class LibVlcUtil {
                 bytes[1] != 'E' ||
                 bytes[2] != 'L' ||
                 bytes[3] != 'F' ||
-                bytes[4] != 1) { // ELFCLASS32, Only 32bit header is supported
+                (bytes[4] != 1 && bytes[4] != 2)) {
+            Log.e(TAG, "ELF header invalid");
             return false;
         }
 
+        elf.is64bits = bytes[4] == 2;
         elf.order = bytes[5] == 1
                 ? ByteOrder.LITTLE_ENDIAN // ELFDATA2LSB
                 : ByteOrder.BIG_ENDIAN;   // ELFDATA2MSB