src/os/linux/vm/os_linux.cpp

@@ -1742,12 +1742,12 @@
   }
 
   typedef struct {
     Elf32_Half  code;         // Actual value as defined in elf.h
     Elf32_Half  compat_class; // Compatibility of archs at VM's sense
-    char        elf_class;    // 32 or 64 bit
-    char        endianess;    // MSB or LSB
+    unsigned char elf_class;    // 32 or 64 bit
+    unsigned char endianess;    // MSB or LSB
     char*       name;         // String representation
   } arch_t;
 
 #ifndef EM_486
   #define EM_486          6               /* Intel 80486 */