mu - Soul of a tiny new machine. More thorough tests → More comprehensible and rewrite-friendly software → More resilient society.

	Commit message (Expand)	Author	Age	Files	Lines
*	5037	Kartik Agaram	2019-03-29	1	-1/+1
*	4981 - no, go back to 3 phases	Kartik Agaram	2019-02-18	1	-1/+6
*	4961	Kartik Agaram	2019-02-14	1	-1/+1
*	4933	Kartik Agaram	2019-01-16	1	-1/+1
*	4931	Kartik Agaram	2019-01-16	1	-1/+0
*	4893	Kartik Agaram	2018-12-30	1	-1/+1
*	4888	Kartik Agaram	2018-12-29	1	-5/+5
*	4881	Kartik Agaram	2018-12-28	1	-1/+1
*	4847	Kartik Agaram	2018-12-06	1	-1/+1
*	4819	Kartik Agaram	2018-12-02	1	-1/+1
*	4812	Kartik Agaram	2018-11-30	1	-2/+2
*	4808 - clean up comments in all subx files	Kartik Agaram	2018-11-30	1	-10/+10
*	4802	Kartik Agaram	2018-11-30	1	-22/+22
*	4801	Kartik Agaram	2018-11-30	1	-63/+63
*	4731	Kartik Agaram	2018-10-28	1	-5/+5
*	4703	Kartik Agaram	2018-10-16	1	-4/+4
*	4700	Kartik Agaram	2018-10-16	1	-2/+2
*	4684	Kartik Agaram	2018-10-11	1	-2/+3
*	4670	Kartik Agaram	2018-10-05	1	-1/+1
*	4668	Kartik Agaram	2018-10-05	1	-2/+2
*	4667	Kartik Agaram	2018-10-05	1	-11/+11
*	4663	Kartik Agaram	2018-10-05	1	-1/+1
*	4662	Kartik Agaram	2018-10-05	1	-1/+1
*	4655	Kartik Agaram	2018-10-02	1	-1/+1
*	4653	Kartik Agaram	2018-10-02	1	-3/+3
*	4651	Kartik Agaram	2018-10-02	1	-1/+3
*	4644	Kartik Agaram	2018-10-01	1	-11/+11
*	4641	Kartik Agaram	2018-10-01	1	-1/+1
*	4638 - extract some common libraries from apps	Kartik Agaram	2018-10-01	1	-321/+1
*	4624	Kartik Agaram	2018-09-30	1	-1/+1
*	4518	Kartik Agaram	2018-09-24	1	-8/+41
*	4517	Kartik Agaram	2018-09-24	1	-5/+5
*	4516	Kartik K. Agaram	2018-09-24	1	-38/+50
*	4514	Kartik Agaram	2018-09-24	1	-3/+11
*	4513	Kartik Agaram	2018-09-24	1	-8/+0
*	4508	Kartik Agaram	2018-09-23	1	-20/+184
*	4506	Kartik Agaram	2018-09-23	1	-0/+13
*	4505	Kartik Agaram	2018-09-23	1	-8/+27
*	4502 - support string literals directly in code	Kartik Agaram	2018-09-22	1	-14/+2
*	4591	Kartik Agaram	2018-09-22	1	-19/+19
*	4586 - factorial checks commandline to run tests	Kartik Agaram	2018-09-21	1	-15/+85
*	4581	Kartik Agaram	2018-09-21	1	-2/+2
*	4567 - support automated tests in SubX	Kartik Agaram	2018-09-21	1	-11/+75
*	4554	Kartik Agaram	2018-09-20	1	-2/+2
*	4537	Kartik Agaram	2018-09-07	1	-5/+3
*	4531 - automatically compute segment addresses	Kartik Agaram	2018-09-01	1	-1/+1
*	4530 - create an apps/ directory	Kartik Agaram	2018-09-01	1	-0/+64

# Write out the (hex) textual representation of numbers. == 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 # convert the lowest nibble of eax to ascii and return it in the lowest byte of eax to-hex-char: # in/eax: int -> out/eax: int # no error checking; accepts argument in eax # if (eax <= 9) return eax + '0' 3d/compare-eax-with 0x9/imm32/9 7f/jump-if-> $to-hex-char:else/disp8 05/add-to-eax 0x30/imm32/0 c3/return $to-hex-char:else: # otherwise return eax + 'a' - 10 05/add-to-eax 0x57/imm32/a-10 c3/return append-byte-hex: # f: (addr stream byte), n: int # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # . save registers 50/push-eax # AL = convert upper nibble to hex 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0xc/disp8 . # copy *(ebp+12) to eax c1/shift 5/subop/logic-right 3/mod/direct 0/rm32/eax . . . . . 4/imm8 # shift eax right by 4 bits, while padding zeroes 25/and-eax 0xf/imm32 # . AL = to-hex-char(AL) e8/call to-hex-char/disp32 # append-byte(f, AL) # . . push args 50/push-eax ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) # . . call e8/call append-byte/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # AL = convert lower nibble to hex 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0xc/disp8 . # copy *(ebp+12) to eax 25/and-eax 0xf/imm32 # . AL = to-hex-char(AL) e8/call to-hex-char/disp32 # append-byte(f, AL) # . . push args 50/push-eax ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) # . . call e8/call append-byte/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp $append-byte-hex:end: # . restore registers 58/pop-to-eax # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return test-append-byte-hex: # - check that append-byte-hex adds the hex textual representation # 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 # append-byte-hex(_test-stream, 0xa) # exercises digit, non-digit as well as leading zero # . . push args 68/push 0xa/imm32 68/push _test-stream/imm32 # . . call e8/call append-byte-hex/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # check-stream-equal(_test-stream, "0a", msg) # . . push args 68/push "F - test-append-byte-hex"/imm32 68/push "0a"/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 # . end c3/return # print the hex representation for the lowest byte of a number write-byte-hex-buffered: # f: (addr buffered-file), n: int # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # . save registers 50/push-eax # AL = convert upper nibble to hex 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0xc/disp8 . # copy *(ebp+12) to eax c1/shift 5/subop/logic-right 3/mod/direct 0/rm32/eax . . . . . 4/imm8 # shift eax right by 4 bits, while padding zeroes 25/and-eax 0xf/imm32 # . AL = to-hex-char(AL) e8/call to-hex-char/disp32 # write-byte-buffered(f, AL) # . . push args 50/push-eax ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) # . . call e8/call write-byte-buffered/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # AL = convert lower nibble to hex 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0xc/disp8 . # copy *(ebp+12) to eax 25/and-eax 0xf/imm32 # . AL = to-hex-char(AL) e8/call to-hex-char/disp32 # write-byte-buffered(f, AL) # . . push args 50/push-eax ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) # . . call e8/call write-byte-buffered/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp $write-byte-hex-buffered:end: # . restore registers 58/pop-to-eax # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return test-write-byte-hex-buffered: # - check that write-byte-hex-buffered prints the hex textual representation # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # . clear-stream($_test-buffered-file->buffer) # . . push args 68/push $_test-buffered-file->buffer/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-byte-hex-buffered(_test-buffered-file, 0xa) # exercises digit, non-digit as well as leading zero # . . push args 68/push 0xa/imm32 68/push _test-buffered-file/imm32 # . . call e8/call write-byte-hex-buffered/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/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-stream-equal(_test-stream, "0a", msg) # . . push args 68/push "F - test-write-byte-hex-buffered"/imm32 68/push "0a"/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 # . end c3/return write-int32-hex: # f: (addr stream byte), n: int # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp $write-int32-hex:hex-prefix: # write(f, "0x") # . . push args 68/push "0x"/imm32 ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) # . . call e8/call write/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp $write-int32-hex:rest: # write-int32-hex-bits(f, n, 32) # . . push args 68/push 0x20/imm32 ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) # . . call e8/call write-int32-hex-bits/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp $write-int32-hex:end: # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return # print rightmost 'bits' of 'n' # bits must be multiple of 4 write-int32-hex-bits: # f: (addr stream byte), n: int, bits: int # pseudocode: # bits -= 4 # while true # if (bits < 0) break # eax = n >> bits # eax = eax & 0xf # append-byte(f, AL) # bits -= 4 # # . prologue 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 # ecx = bits-4 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0x10/disp8 . # copy *(ebp+16) to ecx 81 5/subop/subtract 3/mod/direct 1/rm32/ecx . . . . . 4/imm32 # subtract from ecx $write-int32-hex-bits:loop: # if (bits < 0) break 81 7/subop/compare 3/mod/direct 1/rm32/ecx . . . . . 0/imm32 # compare ecx 7c/jump-if-< $write-int32-hex-bits:end/disp8 # eax = n >> bits 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0xc/disp8 . # copy *(ebp+12) to eax d3/>>ecx 5/subop/pad-zeroes 3/mod/direct 0/rm32/eax . . . . . . # shift eax right by ecx bits, padding zeroes # eax = to-hex-char(AL) 25/and-eax 0xf/imm32 e8/call to-hex-char/disp32 # append-byte(f, AL) # . . push args 50/push-eax ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) # . . call e8/call append-byte/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # bits -= 4 81 5/subop/subtract 3/mod/direct 1/rm32/ecx . . . . . 4/imm32 # subtract from ecx eb/jump $write-int32-hex-bits:loop/disp8 $write-int32-hex-bits:end: # . restore registers 59/pop-to-ecx 58/pop-to-eax # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return test-write-int32-hex: # - check that write-int32-hex prints the hex textual representation # 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 # write-int32-hex(_test-stream, 0x8899aa) # . . push args 68/push 0x8899aa/imm32 68/push _test-stream/imm32 # . . call e8/call write-int32-hex/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # check-stream-equal(_test-stream, "0x008899aa", msg) # . . push args 68/push "F - test-write-int32-hex"/imm32 68/push "0x008899aa"/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 # . end c3/return write-int32-hex-buffered: # f: (addr buffered-file), n: int # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp $write-int32-hex-buffered:hex-prefix: # write-buffered(f, "0x") # . . push args 68/push "0x"/imm32 ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) # . . call e8/call write-buffered/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp $write-int32-hex-buffered:rest: # write-int32-hex-bits-buffered(f, n, 32) # . . push args 68/push 0x20/imm32 ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) # . . call e8/call write-int32-hex-bits-buffered/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp $write-int32-hex-buffered:end: # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return # print rightmost 'bits' of 'n' # bits must be multiple of 4 write-int32-hex-bits-buffered: # f: (addr buffered-file), n: int, bits: int # pseudocode: # bits -= 4 # while true # if (bits < 0) break # eax = n >> bits # eax = eax & 0xf # write-byte-buffered(f, AL) # bits -= 4 # # . prologue 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 # ecx = bits-4 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0x10/disp8 . # copy *(ebp+16) to ecx 81 5/subop/subtract 3/mod/direct 1/rm32/ecx . . . . . 4/imm32 # subtract from ecx $write-int32-hex-bits-buffered:loop: # if (bits < 0) break 81 7/subop/compare 3/mod/direct 1/rm32/ecx . . . . . 0/imm32 # compare ecx 7c/jump-if-< $write-int32-hex-bits-buffered:end/disp8 # eax = n >> bits 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0xc/disp8 . # copy *(ebp+12) to eax d3/>>ecx 5/subop/pad-zeroes 3/mod/direct 0/rm32/eax . . . . . . # shift eax right by ecx bits, padding zeroes # eax = to-hex-char(AL) 25/and-eax 0xf/imm32 e8/call to-hex-char/disp32 # write-byte-buffered(f, AL) # . . push args 50/push-eax ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) # . . call e8/call write-byte-buffered/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # bits -= 4 81 5/subop/subtract 3/mod/direct 1/rm32/ecx . . . . . 4/imm32 # subtract from ecx eb/jump $write-int32-hex-bits-buffered:loop/disp8 $write-int32-hex-bits-buffered:end: # . restore registers 59/pop-to-ecx 58/pop-to-eax # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return test-write-int32-hex-buffered: # - check that write-int32-hex-buffered prints the hex textual representation # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # . clear-stream($_test-buffered-file->buffer) # . . push args 68/push $_test-buffered-file->buffer/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # write-int32-hex-buffered(_test-buffered-file, 0x8899aa) # . . push args 68/push 0x8899aa/imm32 68/push _test-buffered-file/imm32 # . . call e8/call write-int32-hex-buffered/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # flush(_test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 # . . call e8/call flush/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp #? # dump line {{{ #? # . write-stream(2/stderr, line) #? # . . push args #? 68/push _test-stream/imm32 #? 68/push 2/imm32/stderr #? # . . call #? e8/call write-stream/disp32 #? # . . discard args #? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp #? # . write(2/stderr, "$\n") #? # . . push args #? 68/push "$\n"/imm32 #? 68/push 2/imm32/stderr #? # . . call #? e8/call write/disp32 #? # . . discard args #? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp #? # }}} # check-stream-equal(_test-stream, "0x008899aa", msg) # . . push args 68/push "F - test-write-int32-hex-buffered"/imm32 68/push "0x008899aa"/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 # . end c3/return # . . vim:nowrap:textwidth=0