1 (* Capstone Disassembly Engine 2 * By Nguyen Anh Quynh <aquynh (a] gmail.com>, 2013-2014 *) 3 4 open Printf 5 open Capstone 6 open X86 7 open X86_const 8 9 10 let print_string_hex comment str = 11 printf "%s" comment; 12 for i = 0 to (Array.length str - 1) do 13 printf "0x%02x " str.(i) 14 done; 15 printf "\n" 16 17 18 let _X86_CODE16 = "\x8d\x4c\x32\x08\x01\xd8\x81\xc6\x34\x12\x00\x00";; 19 let _X86_CODE32 = "\x8d\x4c\x32\x08\x01\xd8\x81\xc6\x34\x12\x00\x00";; 20 let _X86_CODE64 = "\x55\x48\x8b\x05\xb8\x13\x00\x00";; 21 22 23 let all_tests = [ 24 (CS_ARCH_X86, [CS_MODE_16], _X86_CODE16, "X86 16bit (Intel syntax)", 0L); 25 (CS_ARCH_X86, [CS_MODE_32], _X86_CODE32, "X86 32bit (ATT syntax)", _CS_OPT_SYNTAX_ATT); 26 (CS_ARCH_X86, [CS_MODE_32], _X86_CODE32, "X86 32 (Intel syntax)", 0L); 27 (CS_ARCH_X86, [CS_MODE_64], _X86_CODE64, "X86 64 (Intel syntax)", 0L); 28 ];; 29 30 let print_op handle i op = 31 ( match op.value with 32 | X86_OP_INVALID _ -> (); (* this would never happens *) 33 | X86_OP_REG reg -> printf "\t\top[%d]: REG = %s\n" i (cs_reg_name handle reg); 34 | X86_OP_IMM imm -> printf "\t\top[%d]: IMM = 0x%x\n" i imm; 35 | X86_OP_FP fp -> printf "\t\top[%d]: FP = %f\n" i fp; 36 | X86_OP_MEM mem -> ( printf "\t\top[%d]: MEM\n" i; 37 if mem.base != 0 then 38 printf "\t\t\toperands[%u].mem.base: REG = %s\n" i (cs_reg_name handle mem.base); 39 if mem.index != 0 then 40 printf "\t\t\toperands[%u].mem.index: REG = %s\n" i (cs_reg_name handle mem.index); 41 if mem.scale != 1 then 42 printf "\t\t\toperands[%u].mem.scale: %d\n" i mem.scale; 43 if mem.disp != 0 then 44 printf "\t\t\toperands[%u].mem.disp: 0x%x\n" i mem.disp; 45 ); 46 ); 47 ();; 48 49 50 let print_detail handle mode insn = 51 match insn.arch with 52 | CS_INFO_X86 x86 -> ( 53 print_string_hex "\tPrefix: " x86.prefix; 54 55 (* print instruction's opcode *) 56 print_string_hex "\tOpcode: " x86.opcode; 57 58 (* print operand's size, address size, displacement size & immediate size *) 59 printf "\taddr_size: %u\n" x86.addr_size; 60 61 (* print modRM byte *) 62 printf "\tmodrm: 0x%x\n" x86.modrm; 63 64 (* print displacement value *) 65 if x86.disp != 0 then 66 printf "\tdisp: 0x%x\n" x86.disp; 67 68 (* SIB is invalid in 16-bit mode *) 69 if not (List.mem CS_MODE_16 mode) then ( 70 (* print SIB byte *) 71 printf "\tsib: 0x%x\n" x86.sib; 72 73 (* print sib index/scale/base (if applicable) *) 74 if x86.sib_index != _X86_REG_INVALID then 75 printf "\tsib_index: %s, sib_scale: %u, sib_base: %s\n" 76 (cs_reg_name handle x86.sib_index) 77 x86.sib_scale 78 (cs_reg_name handle x86.sib_base); 79 ); 80 81 (* print all operands info (type & value) *) 82 if (Array.length x86.operands) > 0 then ( 83 printf "\top_count: %d\n" (Array.length x86.operands); 84 Array.iteri (print_op handle) x86.operands; 85 ); 86 printf "\n"; 87 ); 88 | _ -> (); 89 ;; 90 91 92 let print_insn handle mode insn = 93 printf "0x%x\t%s\t%s\n" insn.address insn.mnemonic insn.op_str; 94 print_detail handle mode insn 95 96 97 let print_arch x = 98 let (arch, mode, code, comment, syntax) = x in 99 let handle = cs_open arch mode in ( 100 if syntax != 0L then ( 101 let err = cs_option handle CS_OPT_SYNTAX syntax in 102 match err with 103 | _ -> (); 104 ); 105 let err = cs_option handle CS_OPT_DETAIL _CS_OPT_ON in 106 match err with 107 | _ -> (); 108 let insns = cs_disasm handle code 0x1000L 0L in ( 109 printf "*************\n"; 110 printf "Platform: %s\n" comment; 111 List.iter (print_insn handle mode) insns; 112 ); 113 match cs_close handle with 114 | 0 -> (); 115 | _ -> printf "Failed to close handle"; 116 );; 117 118 List.iter print_arch all_tests;; 119
