# Read a text file of SubX instructions from stdin, and convert it into a list # of whitespace-separated ascii hex bytes on stdout, suitable to be further # processed by apps/hex. # # To run (from the subx/ directory): # $ ./subx translate *.subx apps/pack.subx -o apps/pack # $ echo '05/add-to-EAX 0x20/imm32' |./subx run apps/pack # Expected output: # 05 20 00 00 00 # 05/add-to-EAX 0x20/imm32 # The original instruction gets included as a comment at the end of each # converted line. # # There's zero error-checking. For now we assume the input program is valid. # We'll continue to rely on the C++ version for error messages. # # Label definitions and uses are left untouched for a future 'pass'. == code # instruction effective address register displacement immediate # . op subop mod rm32 base index scale r32 # . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes # for debugging: run a single test #? e8/call test-convert-instruction-passes-labels-through/disp32 #? 8b/copy 0/mod/indirect 5/rm32/.disp32 . . 3/r32/EBX Num-test-failures/disp32 # copy *Num-test-failures to EBX #? eb/jump $main:end/disp8 # main: run tests if necessary, convert stdin if not # . prolog 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # - if argc > 1 and argv[1] == "test", then return run_tests() # . argc > 1 81 7/subop/compare 1/mod/*+disp8 5/rm32/EBP . . . . 0/disp8 1/imm32 # compare *EBP 7e/jump-if-lesser-or-equal $run-main/disp8 # . argv[1] == "test" # . . push args 68/push "test"/imm32 ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8) # . . call e8/call kernel-string-equal?/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # . check result 3d/compare-EAX 1/imm32 75/jump-if-not-equal $run-main/disp8 # . run-tests() e8/call run-tests/disp32 8b/copy 0/mod/indirect 5/rm32/.disp32 . . 3/r32/EBX Num-test-failures/disp32 # copy *Num-test-failures to EBX eb/jump $main:end/disp8 $run-main: # - otherwise convert stdin # var ed/EAX : exit-descriptor 81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # subtract from ESP 89/copy 3/mod/direct 0/rm32/EAX . . . 4/r32/ESP . . # copy ESP to EAX # configure ed to really exit() # . ed->target = 0 c7 0/subop/copy 0/mod/direct 0/rm32/EAX . . . . . 0/imm32 # copy to *EAX # return convert(Stdin, 1/stdout, 2/stderr, ed) # . . push args 50/push-EAX/ed 68/push Stderr/imm32 68/push Stdout/imm32 68/push Stdin/imm32 # . . call e8/call convert/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x10/imm32 # add to ESP # . syscall(exit, 0) bb/copy-to-EBX 0/imm32 $main:end: b8/copy-to-EAX 1/imm32/exit cd/syscall 0x80/imm8 # - big picture # We'll operate on each line/instruction in isolation. That way we only need to # allocate memory for converting a single instruction. # # To pack an entire file: # read every line # convert it # # primary state: line # stream of 512 bytes; abort if it ever overflows convert: # in : (address buffered-file), out : (address buffered-file) -> # pseudocode: # var line = new-stream(512, 1) # repeatedly # clear-stream(line) # EAX = read-line(in, line) # if (EAX == EOF) break # convert-instruction(line, out) # flush(out) # # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # . save registers 51/push-ECX # var line/ECX : (address stream byte) = stream(512) 81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 0x200/imm32 # subtract from ESP 68/push 0x200/imm32/length 68/push 0/imm32/read 68/push 0/imm32/write 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX $convert:loop: # clear-stream(ECX) # . . push args 51/push-ECX # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # EAX = read-line(in, line) # . . push args 51/push-ECX ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8) # . . call e8/call convert-instruction/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # if (EAX == 0xffffffff) break 3d/compare-with-EAX 0xffffffff/imm32 74/jump-if-equal $convert:break/disp8 # convert-instruction(line, out) # . . push args ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0xc/disp8 . # push *(EBP+12) 51/push-ECX # . . call e8/call convert-instruction/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP $convert:break: # flush(out) # . . push args ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0xc/disp8 . # push *(EBP+12) # . . call e8/call flush/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP $convert:end: # . reclaim locals 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x20c/imm32 # add to ESP # . restore registers 59/pop-to-ECX # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return # - To pack an instruction, following the C++ version: # read first word as opcode and write-slice # if 0f or f2 or f3 read second opcode and write-slice # if 'f2 0f' or 'f3 0f' read third opcode and write-slice # while true: # word-slice = next-word # if empty(word-slice) break # if has metadata 'mod', parse into mod # if has metadata 'rm32', parse into rm32 # if has metadata 'r32', parse into r32 # if has metadata 'subop', parse into r32 # if at least one of the 3 was present, print-byte # while true: # word-slice = next-word # if empty(word-slice) break # if has metadata 'base', parse into base # if has metadata 'index', parse into index # if has metadata 'scale', parse into scale # if at least one of the 3 was present, print-byte # parse errors => # while true: # word-slice = next-word # if empty(word-slice) break # if has metadata 'disp8', emit as 1 byte # if has metadata 'disp16', emit as 2 bytes # if has metadata 'disp32', emit as 4 bytes # while true: # word-slice = next-word # if empty(word-slice) break # if has metadata 'imm8', emit # if has metadata 'imm32', emit as 4 bytes # finally, emit line prefixed with a ' # ' # simplifications since we perform zero error handling (continuing to rely on the C++ version for that): # missing fields are always 0-filled # bytes never mentioned are silently dropped; if you don't provide /mod, /rm32 or /r32 you don't get a 0 modrm byte. You get *no* modrm byte. # in case of conflict, last operand with a name is recognized # silently drop extraneous operands # unceremoniously abort on non-numeric operands except disp or imm # conceptual hierarchy within a line: # line = words separated by ' ', maybe followed by comment starting with '#' # word = name until '/', then 0 or more metadata separated by '/' # # we won't bother saving the internal structure of lines; reparsing should be cheap using three primitives: # next-token(stream, delim char) -> slice (start, end pointers) # next-token(stream, slice, delim char) -> slice' # slice-equal?(slice, string) convert-instruction: # line : (address stream byte), out : (address buffered-file) -> # pseudocode: # word-slice = next-word # if (slice-starts-with?(word-slice, '#')) # write-stream-buffered(out, line) # return # if (slice-starts-with?(word-slice, '==')) # write-stream-buffered(out, line) # return # # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # . save registers 51/push-ECX # var word-slice/ECX = {0, 0} 68/push 0/imm32/end 68/push 0/imm32/start 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX # next-word(line, word-slice) # . . push args 51/push-ECX ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8) # . . call e8/call next-word/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP $convert-instruction:pass-line-through: # write-stream-buffered(out, line) # . . push args ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8) ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0xc/disp8 . # push *(EBP+12) # . . call e8/call write-stream-buffered/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP $convert-instruction:end: # . restore registers 59/pop-to-ECX # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return test-convert-instruction-passes-comments-through: # if a line starts with '#', pass it along unchanged # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . clear-stream(_test-buffered-file+4) # . . push args b8/copy-to-EAX _test-buffered-file/imm32 05/add-to-EAX 4/imm32 50/push-EAX # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . clear-stream(_test-tmp-stream) # . . push args 68/push _test-tmp-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # initialize input # . write(_test-tmp-stream, "# abcd") # . . push args 68/push "# abcd"/imm32 68/push _test-tmp-stream/imm32 # . . call e8/call write/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # convert-instruction(_test-tmp-stream, _test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 68/push _test-tmp-stream/imm32 # . . call e8/call convert-instruction/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # check that the write happened as expected # . flush(_test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 # . . call e8/call flush/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . check-stream-equal(_test-stream, "# abcd", msg) # . . push args 68/push "F - test-convert-instruction-passes-comments-through"/imm32 68/push "# abcd"/imm32 68/push _test-stream/imm32 # . . call e8/call check-stream-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return test-convert-instruction-passes-segment-headers-through: # if a line starts with '==', pass it along unchanged # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . clear-stream(_test-buffered-file+4) # . . push args b8/copy-to-EAX _test-buffered-file/imm32 05/add-to-EAX 4/imm32 50/push-EAX # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . clear-stream(_test-tmp-stream) # . . push args 68/push _test-tmp-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # initialize input # . write(_test-tmp-stream, "== abcd") # . . push args 68/push "== abcd"/imm32 68/push _test-tmp-stream/imm32 # . . call e8/call write/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # convert-instruction(_test-tmp-stream, _test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 68/push _test-tmp-stream/imm32 # . . call e8/call convert-instruction/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # check that the write happened as expected # . flush(_test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 # . . call e8/call flush/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . check-stream-equal(_test-stream, "== abcd", msg) # . . push args 68/push "F - test-convert-instruction-passes-segment-headers-through"/imm32 68/push "== abcd"/imm32 68/push _test-stream/imm32 # . . call e8/call check-stream-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return test-convert-instruction-passes-empty-lines-through: # if a line is empty, pass it along unchanged # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . clear-stream(_test-buffered-file+4) # . . push args b8/copy-to-EAX _test-buffered-file/imm32 05/add-to-EAX 4/imm32 50/push-EAX # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . clear-stream(_test-tmp-stream) # . . push args 68/push _test-tmp-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # write nothing to input # convert-instruction(_test-tmp-stream, _test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 68/push _test-tmp-stream/imm32 # . . call e8/call convert-instruction/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # check that the write happened as expected # . flush(_test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 # . . call e8/call flush/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . check-stream-equal(_test-stream, "", msg) # . . push args 68/push "F - test-convert-instruction-passes-empty-lines-through"/imm32 68/push ""/imm32 68/push _test-stream/imm32 # . . call e8/call check-stream-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return test-convert-instruction-passes-lines-with-just-whitespace-through: # if a line is empty, pass it along unchanged # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . clear-stream(_test-buffered-file+4) # . . push args b8/copy-to-EAX _test-buffered-file/imm32 05/add-to-EAX 4/imm32 50/push-EAX # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . clear-stream(_test-tmp-stream) # . . push args 68/push _test-tmp-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # initialize input # . write(_test-tmp-stream, " ") # . . push args 68/push " "/imm32 68/push _test-tmp-stream/imm32 # . . call e8/call write/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # convert-instruction(_test-tmp-stream, _test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 68/push _test-tmp-stream/imm32 # . . call e8/call convert-instruction/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # check that the write happened as expected # . flush(_test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 # . . call e8/call flush/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . check-stream-equal(_test-stream, " ", msg) # . . push args 68/push "F - test-convert-instruction-passes-with-just-whitespace-through"/imm32 68/push " "/imm32 68/push _test-stream/imm32 # . . call e8/call check-stream-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return test-convert-instruction-passes-labels-through: # if the first word ends with ':', pass along the entire line unchanged # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . clear-stream(_test-buffered-file+4) # . . push args b8/copy-to-EAX _test-buffered-file/imm32 05/add-to-EAX 4/imm32 50/push-EAX # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . clear-stream(_test-tmp-stream) # . . push args 68/push _test-tmp-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # initialize input # . write(_test-tmp-stream, "ab: # cd") # . . push args 68/push "ab: # cd"/imm32 68/push _test-tmp-stream/imm32 # . . call e8/call write/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # convert-instruction(_test-tmp-stream, _test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 68/push _test-tmp-stream/imm32 # . . call e8/call convert-instruction/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # check that the write happened as expected # . flush(_test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 # . . call e8/call flush/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . check-stream-equal(_test-stream, "ab: # cd", msg) # . . push args 68/push "F - test-convert-instruction-passes-labels-through"/imm32 68/push "ab: # cd"/imm32 68/push _test-stream/imm32 # . . call e8/call check-stream-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return # (re)compute the bounds of the next word in the line next-word: # line : (address stream byte), out : (address slice) # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # . save registers 50/push-EAX 51/push-ECX 56/push-ESI 57/push-EDI # ESI = line 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 8/disp8 . # copy *(EBP+8) to ESI # EDI = out 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 7/r32/EDI 0xc/disp8 . # copy *(EBP+12) to EDI # skip-chars-matching(line, ' ') # . . push args 68/push 0x20/imm32/space ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8) # . . call e8/call skip-chars-matching/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # out->start = &line->data[line->read] 8b/copy 1/mod/*+disp8 6/rm32/ESI . . . 1/r32/ECX 4/disp8 . # copy *(ESI+4) to ECX 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/ESI 1/index/ECX . 0/r32/EAX 0xc/disp8 . # copy ESI+ECX+12 to EAX 89/copy 0/mod/indirect 7/rm32/EDI . . . 0/r32/EAX . . # copy EAX to *EDI # if (line->data[line->read] == '#') out->end = &line->data[line->write]), skip rest of stream and return # . EAX = line->data[line->read] 31/xor 3/mod/direct 0/rm32/EAX . . . 0/r32/EAX . . # clear EAX 8a/copy-byte 1/mod/*+disp8 4/rm32/sib 6/base/ESI 1/index/ECX . 0/r32/AL 0xc/disp8 . # copy byte at *(ESI+ECX+12) to AL # . compare 3d/compare-EAX-with 0x23/imm32/pound 75/jump-if-not-equal $next-word:not-comment/disp8 # . out->end = &line->data[line->write] 8b/copy 0/mod/indirect 6/rm32/ESI . . . 0/r32/EAX . . # copy *ESI to EAX 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/ESI 0/index/EAX . 0/r32/EAX 0xc/disp8 . # copy ESI+EAX+12 to EAX 89/copy 1/mod/*+disp8 7/rm32/EDI . . . 0/r32/EAX 4/disp8 . # copy EAX to *(EDI+4) # . line->read = line->write 89/copy 1/mod/*+disp8 6/rm32/ESI . . . 0/r32/EAX 4/disp8 . # copy EAX to *(ESI+4) # . return eb/jump $next-word:end/disp8 $next-word:not-comment: # otherwise skip-chars-not-matching(line, ' ') # . . push args 68/push 0x20/imm32/space ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8) # . . call e8/call skip-chars-not-matching/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # out->end = &line->data[line->read] 8b/copy 1/mod/*+disp8 6/rm32/ESI . . . 1/r32/ECX 4/disp8 . # copy *(ESI+4) to ECX 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/ESI 1/index/ECX . 0/r32/EAX 0xc/disp8 . # copy ESI+ECX+12 to EAX 89/copy 1/mod/*+disp8 7/rm32/EDI . . . 0/r32/EAX 4/disp8 . # copy EAX to *(EDI+4) $next-word:end: # . restore registers 5f/pop-to-EDI 5e/pop-to-ESI 59/pop-to-ECX 58/pop-to-EAX # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return test-next-word: # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # var slice/ECX = {0, 0} 68/push 0/imm32/end 68/push 0/imm32/start 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX # write(_test-stream, " ab") # . . push args 68/push " ab"/imm32 68/push _test-stream/imm32 # . . call e8/call write/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # next-word(_test-stream, slice) # . . push args 51/push-ECX 68/push _test-stream/imm32 # . . call e8/call next-word/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # check-ints-equal(slice->start - _test-stream->data, 2, msg) # . check-ints-equal(slice->start - _test-stream, 14, msg) # . . push args 68/push "F - test-next-word: start"/imm32 68/push 0xe/imm32 # . . push slice->start - _test-stream 8b/copy 0/mod/indirect 1/rm32/ECX . . . 0/r32/EAX . . # copy *ECX to EAX 81 5/subop/subtract 3/mod/direct 0/rm32/EAX . . . . . _test-stream/imm32 # subtract from EAX 50/push-EAX # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # check-ints-equal(slice->end - _test-stream->data, 4, msg) # . check-ints-equal(slice->end - _test-stream, 16, msg) # . . push args 68/push "F - test-next-word: end"/imm32 68/push 0x10/imm32 # . . push slice->end - _test-stream 8b/copy 1/mod/*+disp8 1/rm32/ECX . . . 0/r32/EAX 4/disp8 . # copy *(ECX+4) to EAX 81 5/subop/subtract 3/mod/direct 0/rm32/EAX . . . . . _test-stream/imm32 # subtract from EAX 50/push-EAX # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return test-next-word-returns-whole-comment: # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # var slice/ECX = {0, 0} 68/push 0/imm32/end 68/push 0/imm32/start 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX # write(_test-stream, " # a") # . . push args 68/push " # a"/imm32 68/push _test-stream/imm32 # . . call e8/call write/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # next-word(_test-stream, slice) # . . push args 51/push-ECX 68/push _test-stream/imm32 # . . call e8/call next-word/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # check-ints-equal(slice->start - _test-stream->data, 2, msg) # . check-ints-equal(slice->start - _test-stream, 14, msg) # . . push args 68/push "F - test-next-word-returns-whole-comment: start"/imm32 68/push 0xe/imm32 # . . push slice->start - _test-stream 8b/copy 0/mod/indirect 1/rm32/ECX . . . 0/r32/EAX . . # copy *ECX to EAX 81 5/subop/subtract 3/mod/direct 0/rm32/EAX . . . . . _test-stream/imm32 # subtract from EAX 50/push-EAX # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # check-ints-equal(slice->end - _test-stream->data, 5, msg) # . check-ints-equal(slice->end - _test-stream, 17, msg) # . . push args 68/push "F - test-next-word-returns-whole-comment: end"/imm32 68/push 0x11/imm32 # . . push slice->end - _test-stream 8b/copy 1/mod/*+disp8 1/rm32/ECX . . . 0/r32/EAX 4/disp8 . # copy *(ECX+4) to EAX 81 5/subop/subtract 3/mod/direct 0/rm32/EAX . . . . . _test-stream/imm32 # subtract from EAX 50/push-EAX # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return has-metadata?: # word : (address slice), s : (address string) -> EAX : boolean # pseudocode: # var twig : &slice = next-token-from-slice(word->start, word->end, '/') # skip name # curr = twig->end # while true: # twig = next-token-from-slice(curr, word->end, '/') # if (twig.empty()) break # if (slice-equal?(twig, s)) return true # curr = twig->end # return false # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # . save registers 51/push-ECX 52/push-EDX 56/push-ESI 57/push-EDI # ESI = word 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 8/disp8 . # copy *(EBP+8) to ESI # EDX = word->end 8b/copy 1/mod/*+disp8 6/rm32/ESI . . . 2/r32/EDX 4/disp8 . # copy *(ESI+4) to EDX # var twig/EDI : (address slice) = {0, 0} 68/push 0/imm32/end 68/push 0/imm32/start 89/copy 3/mod/direct 7/rm32/EDI . . . 4/r32/ESP . . # copy ESP to EDI # next-token-from-slice(word->start, word->end, '/', twig) # . . push args 57/push-EDI 68/push 0x2f/imm32/slash 52/push-EDX ff 6/subop/push 0/mod/indirect 6/rm32/ESI . . . . . . # push *ESI # . . call e8/call next-token-from-slice/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x10/imm32 # add to ESP # curr/ECX = twig->end 8b/copy 1/mod/*+disp8 7/rm32/EDI . . . 1/r32/ECX 4/disp8 . # copy *(EDI+4) to ECX $has-metadata?:loop: # next-token-from-slice(curr, word->end, '/', twig) # . . push args 57/push-EDI 68/push 0x2f/imm32/slash 52/push-EDX 51/push-ECX # . . call e8/call next-token-from-slice/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x10/imm32 # add to ESP # if (slice-empty?(twig)) return false # . EAX = slice-empty?(twig) # . . push args 57/push-EDI # . . call e8/call slice-empty?/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . if (EAX != 0) return false 81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0/imm32 # compare EAX 75/compare-if-not-equal $has-metadata?:false/disp8 # if (slice-equal?(twig, s)) return true # . EAX = slice-equal?(twig, s) # . . push args ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0xc/disp8 . # push *(EBP+12) 57/push-EDI # . . call e8/call slice-equal?/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # . if (EAX != 0) return true 81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0/imm32 # compare EAX 75/compare-if-not-equal $has-metadata?:true/disp8 # curr = twig->end 8b/copy 1/mod/*+disp8 7/rm32/EDI . . . 1/r32/ECX 4/disp8 . # copy *(EDI+4) to ECX eb/jump $has-metadata?:loop/disp8 $has-metadata?:true: b8/copy-to-EAX 1/imm32/true eb/jump $has-metadata?:end/disp8 $has-metadata?:false: b8/copy-to-EAX 0/imm32/false $has-metadata?:end: # . reclaim locals 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # . restore registers 5f/pop-to-EDI 5e/pop-to-ESI 5a/pop-to-EDX 59/pop-to-ECX # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return test-has-metadata-true: # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # (EAX..ECX) = "ab/c" b8/copy-to-EAX "ab/c"/imm32 8b/copy 0/mod/indirect 0/rm32/EAX . . . 1/r32/ECX . . # copy *EAX to ECX 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 1/index/ECX . 1/r32/ECX 4/disp8 . # copy EAX+ECX+4 to ECX 05/add-to-EAX 4/imm32 # var in/ESI : (address slice) = {EAX, ECX} 51/push-ECX 50/push-EAX 89/copy 3/mod/direct 6/rm32/ESI . . . 4/r32/ESP . . # copy ESP to ESI # EAX = has-metadata?(ESI, "c") # . . push args 68/push "c"/imm32 56/push-ESI # . . call e8/call has-metadata?/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x8/imm32 # add to ESP # check-ints-equal(EAX, 1, msg) # . . push args 68/push "F - test-has-metadata-true"/imm32 68/push 1/imm32/true 50/push-EAX # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return test-has-metadata-false: # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # (EAX..ECX) = "ab/c" b8/copy-to-EAX "ab/c"/imm32 8b/copy 0/mod/indirect 0/rm32/EAX . . . 1/r32/ECX . . # copy *EAX to ECX 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 1/index/ECX . 1/r32/ECX 4/disp8 . # copy EAX+ECX+4 to ECX 05/add-to-EAX 4/imm32 # var in/ESI : (address slice) = {EAX, ECX} 51/push-ECX 50/push-EAX 89/copy 3/mod/direct 6/rm32/ESI . . . 4/r32/ESP . . # copy ESP to ESI # EAX = has-metadata?(ESI, "c") # . . push args 68/push "d"/imm32 56/push-ESI # . . call e8/call has-metadata?/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x8/imm32 # add to ESP # check-ints-equal(EAX, 0, msg) # . . push args 68/push "F - test-has-metadata-false"/imm32 68/push 0/imm32/false 50/push-EAX # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return test-has-metadata-ignore-name: # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # (EAX..ECX) = "a/b" b8/copy-to-EAX "a/b"/imm32 8b/copy 0/mod/indirect 0/rm32/EAX . . . 1/r32/ECX . . # copy *EAX to ECX 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 1/index/ECX . 1/r32/ECX 4/disp8 . # copy EAX+ECX+4 to ECX 05/add-to-EAX 4/imm32 # var in/ESI : (address slice) = {EAX, ECX} 51/push-ECX 50/push-EAX 89/copy 3/mod/direct 6/rm32/ESI . . . 4/r32/ESP . . # copy ESP to ESI # EAX = has-metadata?(ESI, "a") # . . push args 68/push "a"/imm32 56/push-ESI # . . call e8/call has-metadata?/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x8/imm32 # add to ESP # check-ints-equal(EAX, 0, msg) # . . push args 68/push "F - test-has-metadata-ignore-name"/imm32 68/push 0/imm32/false 50/push-EAX # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return test-has-metadata-multiple-true: # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # (EAX..ECX) = "a/b/c" b8/copy-to-EAX "a/b/c"/imm32 8b/copy 0/mod/indirect 0/rm32/EAX . . . 1/r32/ECX . . # copy *EAX to ECX 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 1/index/ECX . 1/r32/ECX 4/disp8 . # copy EAX+ECX+4 to ECX 05/add-to-EAX 4/imm32 # var in/ESI : (address slice) = {EAX, ECX} 51/push-ECX 50/push-EAX 89/copy 3/mod/direct 6/rm32/ESI . . . 4/r32/ESP . . # copy ESP to ESI # EAX = has-metadata?(ESI, "c") # . . push args 68/push "c"/imm32 56/push-ESI # . . call e8/call has-metadata?/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x8/imm32 # add to ESP # check-ints-equal(EAX, 1, msg) # . . push args 68/push "F - test-has-metadata-multiple-true"/imm32 68/push 1/imm32/true 50/push-EAX # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return test-has-metadata-multiple-false: # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # (EAX..ECX) = "a/b/c" b8/copy-to-EAX "a/b/c"/imm32 8b/copy 0/mod/indirect 0/rm32/EAX . . . 1/r32/ECX . . # copy *EAX to ECX 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 1/index/ECX . 1/r32/ECX 4/disp8 . # copy EAX+ECX+4 to ECX 05/add-to-EAX 4/imm32 # var in/ESI : (address slice) = {EAX, ECX} 51/push-ECX 50/push-EAX 89/copy 3/mod/direct 6/rm32/ESI . . . 4/r32/ESP . . # copy ESP to ESI # EAX = has-metadata?(ESI, "d") # . . push args 68/push "d"/imm32 56/push-ESI # . . call e8/call has-metadata?/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x8/imm32 # add to ESP # check-ints-equal(EAX, 0, msg) # . . push args 68/push "F - test-has-metadata-multiple-false"/imm32 68/push 0/imm32/false 50/push-EAX # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return # if the name of 'word' is all hex digits, parse and print its value in 'width' bytes of hex, least significant first # otherwise just print the entire word emit: # out : (address buffered-file), word : (address slice), width : int # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # . save registers 50/push-EAX 56/push-ESI 57/push-EDI # ESI = word 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 0xc/disp8 . # copy *(EBP+12) to ESI # var name/EDI : (address slice) = {0, 0} 68/push 0/imm32/end 68/push 0/imm32/start 89/copy 3/mod/direct 7/rm32/EDI . . . 4/r32/ESP . . # copy ESP to EDI # name = next-token-from-slice(word->start, word->end, '/') # . . push args 57/push-EDI 68/push 0x2f/imm32/slash ff 6/subop/push 1/mod/*+disp8 6/rm32/ESI . . . . 4/disp8 . # push *(ESI+4) ff 6/subop/push 0/mod/indirect 6/rm32/ESI . . . . . . # push *ESI # . . call e8/call next-token-from-slice/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x10/imm32 # add to ESP # if (!is-hex-int?(name)) write-slice(out, word) and return # . is-hex-int?(name) # . . push args 57/push-EDI # . . call e8/call is-hex-int?/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . if (EAX == 0) 81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0/imm32 # compare EAX 75/jump-if-not-equal $emit:hex-int/disp8 # . write-slice(out, word) # . . push args 56/push-ESI ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8) # . . call e8/call write-slice/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # . return eb/jump $emit:end/disp8 # otherwise emit-hex(out, parse-hex-int(name), width) $emit:hex-int: # . n/EAX = parse-hex-int(name) # . . push args 57/push-EDI # . . call e8/call parse-hex-int/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . emit-hex(out, n, width) # . . push args ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0x10/disp8 . # push *(EBP+16) 50/push-EAX ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8) # . . call e8/call emit-hex/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP $emit:end: # . reclaim locals 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # . restore registers 5f/pop-to-EDI 5e/pop-to-ESI 58/pop-to-EAX # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return test-emit-number: # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . clear-stream(_test-buffered-file+4) # . . push args b8/copy-to-EAX _test-buffered-file/imm32 05/add-to-EAX 4/imm32 50/push-EAX # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # var slice/ECX = "-2" 68/push _test-slice-negative-two-end/imm32/end 68/push _test-slice-negative-two/imm32/start 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX # emit(_test-buffered-file, slice, 2) # . . push args 68/push 2/imm32 51/push-ECX 68/push _test-buffered-file/imm32 # . . call e8/call emit/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # flush(_test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 # . . call e8/call flush/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # check(_test-stream->data == 'fe ff ') # . check-ints-equal(_test-stream->data[0..3], 'fe f', msg) # . . push args 68/push "F - test-emit-number/1"/imm32 68/push 0x66206566/imm32 # . . push *_test-stream->data b8/copy-to-EAX _test-stream/imm32 ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0xc/disp8 . # push *(EAX+12) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . check-ints-equal(_test-stream->data[4..7], 'f ', msg) # . . push args 68/push "F - test-emit-number/2"/imm32 68/push 0x2066/imm32 # . . push *_test-stream->data b8/copy-to-EAX _test-stream/imm32 ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0x10/disp8 . # push *(EAX+16) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return test-emit-number-with-metadata: # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . clear-stream(_test-buffered-file+4) # . . push args b8/copy-to-EAX _test-buffered-file/imm32 05/add-to-EAX 4/imm32 50/push-EAX # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # var slice/ECX = "-2/foo" 68/push _test-slice-negative-two-metadata-end/imm32/end 68/push _test-slice-negative-two/imm32/start 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX # emit(_test-buffered-file, slice, 2) # . . push args 68/push 2/imm32 51/push-ECX 68/push _test-buffered-file/imm32 # . . call e8/call emit/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # flush(_test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 # . . call e8/call flush/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # the '/foo' will have no impact on the output # check(_test-stream->data == 'fe ff ') # . check-ints-equal(_test-stream->data[0..3], 'fe f', msg) # . . push args 68/push "F - test-emit-number-with-metadata/1"/imm32 68/push 0x66206566/imm32 # . . push *_test-stream->data b8/copy-to-EAX _test-stream/imm32 ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0xc/disp8 . # push *(EAX+12) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . check-ints-equal(_test-stream->data[4..7], 'f ', msg) # . . push args 68/push "F - test-emit-number-with-metadata/2"/imm32 68/push 0x2066/imm32 # . . push *_test-stream->data b8/copy-to-EAX _test-stream/imm32 ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0x10/disp8 . # push *(EAX+16) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return test-emit-non-number: # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . clear-stream(_test-buffered-file+4) # . . push args b8/copy-to-EAX _test-buffered-file/imm32 05/add-to-EAX 4/imm32 50/push-EAX # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # var slice/ECX = "xyz" 68/push _test-slice-non-number-word-end/imm32/end 68/push _test-slice-non-number-word/imm32/start 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX # emit(_test-buffered-file, slice, 2) # . . push args 68/push 2/imm32 51/push-ECX 68/push _test-buffered-file/imm32 # . . call e8/call emit/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # flush(_test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 # . . call e8/call flush/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # check(_test-stream->data == 'xyz') # . check-ints-equal(_test-stream->data[0..3], 'xyz', msg) # . . push args 68/push "F - test-emit-non-number"/imm32 68/push 0x7a7978/imm32 # . . push *_test-stream->data b8/copy-to-EAX _test-stream/imm32 ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0xc/disp8 . # push *(EAX+12) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return test-emit-non-number-with-metadata: # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . clear-stream(_test-buffered-file+4) # . . push args b8/copy-to-EAX _test-buffered-file/imm32 05/add-to-EAX 4/imm32 50/push-EAX # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # var slice/ECX = "xyz/" 68/push _test-slice-non-number-word-metadata-end/imm32/end 68/push _test-slice-non-number-word/imm32/start 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX # emit(_test-buffered-file, slice, 2) # . . push args 68/push 2/imm32 51/push-ECX 68/push _test-buffered-file/imm32 # . . call e8/call emit/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # flush(_test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 # . . call e8/call flush/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # check(_test-stream->data == 'xyz/') # . check-ints-equal(_test-stream->data[0..3], 'xyz/', msg) # . . push args 68/push "F - test-emit-non-number-with-metadata"/imm32 68/push 0x2f7a7978/imm32 # . . push *_test-stream->data b8/copy-to-EAX _test-stream/imm32 ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0xc/disp8 . # push *(EAX+12) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return # print 'n' in hex in 'width' bytes in lower-endian order, with a space after every byte emit-hex: # out : (address buffered-file), n : int, width : int # . prolog 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # . save registers 50/push-EAX 51/push-ECX 52/push-EDX 53/push-EBX 57/push-EDI # EDI = out 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 7/r32/EDI 8/disp8 . # copy *(EBP+8) to EDI # EBX = n 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 3/r32/EBX 0xc/disp8 . # copy *(EBP+12) to EBX # EDX = width 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 2/r32/EDX 0x10/disp8 . # copy *(EBP+16) to EDX # var curr/ECX = 0 31/xor 3/mod/direct 1/rm32/ECX . . . 1/r32/ECX . . # clear ECX $emit-hex:loop: # if (curr >= width) break 39/compare 3/mod/direct 1/rm32/ECX . . . 2/r32/EDX . . # compare ECX and EDX 7d/jump-if-greater-or-equal $emit-hex:end/disp8 # print-byte(out, EBX) # . . push args 53/push-EBX 57/push-EDI # . . call e8/call print-byte/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # write-byte(out, ' ') # . . push args 68/push 0x20/imm32/space 57/push-EDI # . . call e8/call write-byte/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP # EBX = EBX >> 8 c1/shift 5/subop/logic-right 3/mod/direct 3/rm32/EBX . . . . . 8/imm8 # shift EBX right by 8 bits, while padding zeroes # ++curr 41/increment-ECX eb/jump $emit-hex:loop/disp8 $emit-hex:end: # . restore registers 5f/pop-to-EDI 5b/pop-to-EBX 5a/pop-to-EAX 59/pop-to-ECX 58/pop-to-EAX # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return test-emit-hex-single-byte: # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . clear-stream(_test-buffered-file+4) # . . push args b8/copy-to-EAX _test-buffered-file/imm32 05/add-to-EAX 4/imm32 50/push-EAX # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # emit-hex(_test-buffered-file, 0xab, 1) # . . push args 68/push 1/imm32 68/push 0xab/imm32 68/push _test-buffered-file/imm32 # . . call e8/call emit-hex/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # flush(_test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 # . . call e8/call flush/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # check-ints-equal(*_test-stream->data, 'ab ', msg) # . . push args 68/push "F - test-emit-hex-single-byte"/imm32 68/push 0x206261/imm32 # . . push *_test-stream->data b8/copy-to-EAX _test-stream/imm32 ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0xc/disp8 . # push *(EAX+12) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . end c3/return test-emit-hex-multiple-byte: # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . clear-stream(_test-buffered-file+4) # . . push args b8/copy-to-EAX _test-buffered-file/imm32 05/add-to-EAX 4/imm32 50/push-EAX # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # emit-hex(_test-buffered-file, 0x1234, 2) # . . push args 68/push 2/imm32 68/push 0x1234/imm32 68/push _test-buffered-file/imm32 # . . call e8/call emit-hex/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # flush(_test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 # . . call e8/call flush/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # check(_test-stream->data == '34 12 ') # . check-ints-equal(_test-stream->data[0..3], '34 1', msg) # . . push args 68/push "F - test-emit-hex-multiple-byte/1"/imm32 68/push 0x31203433/imm32 # . . push *_test-stream->data b8/copy-to-EAX _test-stream/imm32 ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0xc/disp8 . # push *(EAX+12) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . check-ints-equal(_test-stream->data[4..7], '2 ', msg) # . . push args 68/push "F - test-emit-hex-multiple-byte/2"/imm32 68/push 0x2032/imm32 # . . push *_test-stream->data b8/copy-to-EAX _test-stream/imm32 ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0x10/disp8 . # push *(EAX+16) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . end c3/return test-emit-hex-zero-pad: # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . clear-stream(_test-buffered-file+4) # . . push args b8/copy-to-EAX _test-buffered-file/imm32 05/add-to-EAX 4/imm32 50/push-EAX # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # emit-hex(_test-buffered-file, 0xab, 2) # . . push args 68/push 2/imm32 68/push 0xab/imm32 68/push _test-buffered-file/imm32 # . . call e8/call emit-hex/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # flush(_test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 # . . call e8/call flush/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # check(_test-stream->data == '00 ab') # . check-ints-equal(*_test-stream->data, 'ab 0', msg) # . . push args 68/push "F - test-emit-hex-zero-pad/1"/imm32 68/push 0x30206261/imm32 # . . push *_test-stream->data b8/copy-to-EAX _test-stream/imm32 ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0xc/disp8 . # push *(EAX+12) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . check-ints-equal(*_test-stream->data[1], '0 ', msg) # . . push args 68/push "F - test-emit-hex-zero-pad/2"/imm32 68/push 0x2030/imm32 # . . push *_test-stream->data b8/copy-to-EAX _test-stream/imm32 ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0x10/disp8 . # push *(EAX+16) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . end c3/return test-emit-hex-negative: # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . clear-stream(_test-buffered-file+4) # . . push args b8/copy-to-EAX _test-buffered-file/imm32 05/add-to-EAX 4/imm32 50/push-EAX # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # emit-hex(_test-buffered-file, -1, 2) # . . push args 68/push 2/imm32 68/push -1/imm32 68/push _test-buffered-file/imm32 # . . call e8/call emit-hex/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # flush(_test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 # . . call e8/call flush/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # check(_test-stream->data == 'ff ff ') # . check-ints-equal(_test-stream->data[0..3], 'ff f', msg) # . . push args 68/push "F - test-emit-hex-negative/1"/imm32 68/push 0x66206666/imm32 # . . push *_test-stream->data b8/copy-to-EAX _test-stream/imm32 ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0xc/disp8 . # push *(EAX+12) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . check-ints-equal(_test-stream->data[4..7], 'f ', msg) # . . push args 68/push "F - test-emit-hex-negative/2"/imm32 68/push 0x2066/imm32 # . . push *_test-stream->data b8/copy-to-EAX _test-stream/imm32 ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0x10/disp8 . # push *(EAX+16) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP # . end c3/return == data _test-slice-negative-two: 2d/- 32/2 _test-slice-negative-two-end: 2f/slash 66/f 6f/o 6f/o _test-slice-negative-two-metadata-end: _test-slice-non-number-word: 78/x 79/y 7a/z _test-slice-non-number-word-end: 2f/slash _test-slice-non-number-word-metadata-end: # . . vim:nowrap:textwidth=0