Since it's on topic and pretty cool, Common Lisp has built-in support for this with the disassemble function, (disassemble <function-name>): CL-USER> (defu

Since it's on topic and pretty cool, Common Lisp has built-in support for this with the disassemble function, (disassemble <function-name>): CL-USER> (defun do-something (a b) (format t "a: ~a~%b: ~a~%~%" a b)) DO-SOMETHING CL-USER> (disassemble #'do-something) ; disassembly for DO-SOMETHING ; Size: 216 bytes. Origin: #x537D0F66 ; DO-SOMETHING ; 0F66: 498B4510 MOV RAX, [R13+16] ; thread.binding-stack-pointer ; 0F6A: 488945F8 MOV [RBP-8], RAX ; 0F6E: 840425F87F0050 TEST AL, [#x50007FF8] ; safepoint ; 0F75: 498BB5E8050000 MOV RSI, [R13+1512] ; tls: *STANDARD-OUTPUT* ; 0F7C: 4883FEFF CMP RSI, -1 ; 0F80: 480F443425B05B1450 CMOVEQ RSI, [#x50145BB0] ; *STANDARD-OUTPUT* ; 0F89: 488975E0 MOV [RBP-32], RSI ; 0F8D: 4883EC10 SUB RSP, 16 ; 0F91: 488B1570FFFFFF MOV RDX, [RIP-144] ; "a: " ; 0F98: 488B7DE0 MOV RDI, [RBP-32] ; ... And of course it works for the functions that are defined by the standard, too: CL-USER> (disassemble #'format) ; disassembly for FORMAT ; Size: 581 bytes. Origin: #x52A12CCD ; FORMAT ; CCD: 840425F87F0050 TEST AL, [#x50007FF8] ; safepoint ; CD4: 48817DF817810050 CMP QWORD PTR [RBP-8], #x50008117 ; NIL ; CDC: 0F85CB000000 JNE L4 ; CE2: 4881EC90000000 SUB RSP, 144 ; CE9: 4883E4F0 AND RSP, -16 ; CED: 488D7C240F LEA RDI, [RSP+15] ; CF2: 48C747F1E5000000 MOV QWORD PTR [RDI-15], 229 ; CFA: 48C747F93E000000 MOV QWORD PTR [RDI-7], 62 ; D02: 4881ECB0000000 SUB RSP, 176 ; D09: 4883E4F0 AND RSP, -16 ; D0D: 488BC4 MOV RAX, RSP ; ... CL-USER> (disassemble #'first) CL-USER> (disassemble #'+)