This is an up-to-date libdasm fork. it's public domain.

updates

added opcodes :

• 0xf6-0xf7 group 3 xx001xxx test
• 0xc0-0xc1 group 2 xx110xxx sal

fixes :

• 0xd9 0xd0-0xff fpu
• 0x8c mov segment register
• 0x0f 0xb6-0xb7 movzx

test

libdasm\examples>das test32.bin
00000000  d9e0              fchs
00000002  d9e1              fabs
00000004  90                nop
00000005  f60000            test byte [eax],0x0
00000008  f60800            test byte [eax],0x0
0000000b  f70000000000      test dword [eax],0x0
00000011  f70800000000      test dword [eax],0x0
00000017  90                nop
00000018  8c00              mov [eax],es
0000001a  90                nop
0000001b  0fb700            movzx eax,[eax]
0000001e  0fb600            movzx eax,[eax]
00000021  0fb68000000000    movzx eax,[eax+0x0]
00000028  90                nop
00000029  c03000            sal byte [eax],0x0
0000002c  c13000            sal dword [eax],0x0
0000002f  90                nop
...

credits and links

thanks to :

• Georg Wicherski
• Silvio Cesare
• Ero Carrera
• BeatriX

other disassembly engines:

• Distorm64
• BeaEngine
• libdisasm
• Hacker Disassembler Engine
• libdisassemble
• Udis86

documentation:

• Intel
• AMD
• Sandpile.org
• x86 instruction reference