diff options
| author | Kartik Agaram <vc@akkartik.com> | 2019-08-24 23:42:04 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2019-08-24 23:42:04 -0700 |
| commit | be063736d0cd1f4141dc595361b575605683269d (patch) | |
| tree | 7b96e47a105fdfb33f1d7733a5c8af01c50397c0 | |
| parent | cf529da9860357800f83aad02a5138ceafb04072 (diff) | |
| download | mu-be063736d0cd1f4141dc595361b575605683269d.tar.gz | |
parsing *(reg+disp)
| -rwxr-xr-x | apps/desugar | bin | 41959 -> 43605 bytes | |||
| -rw-r--r-- | apps/desugar.subx | 556 | ||||
| -rw-r--r-- | apps/survey.subx | 1 |
3 files changed, 549 insertions, 8 deletions
diff --git a/apps/desugar b/apps/desugar index 94e057b4..8b1eb786 100755 --- a/apps/desugar +++ b/apps/desugar Binary files differdiff --git a/apps/desugar.subx b/apps/desugar.subx index 767d1ee6..6d2d607b 100644 --- a/apps/desugar.subx +++ b/apps/desugar.subx @@ -1577,9 +1577,23 @@ $parse-effective-address:compound-expression: # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # . EDI = *EAX - 8b/copy 0/mod/indirect 0/rm32/EAX . . . 7/r32/EDI . . # copy *EAX to EAX + 8b/copy 0/mod/indirect 0/rm32/EAX . . . 7/r32/EDI . . # copy *EAX to EDI # skip whitespace + # . EAX = skip-chars-matching-whitespace-in-slice(word->start, word->end) + # . . push args + 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 skip-chars-matching-whitespace-in-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # . word->start = EAX + 89/copy 0/mod/indirect 6/rm32/ESI . . . 0/r32/EAX . . # copy EAX to *ESI # if (*word->start == ')') goto end + 8a/copy-byte 0/mod/indirect 0/rm32/EAX . . . 0/r32/AL . . # copy byte at *EAX to AL + 81 4/subop/and 3/mod/direct 0/rm32/EAX . . . . . 0xff/imm32 # bitwise and of EAX + 3d/compare-EAX-and 0x29/imm32/close-paren + 74/jump-if-equal $parse-effective-address:end/disp8 # if (*word->start != '+') goto error2 # ++word->start # skip whitespace @@ -1595,11 +1609,28 @@ $parse-effective-address:compound-expression: # skip whitespace # if (*word->start == ')') goto end # } - # if (*word->start != '+') goto error4 - # ++word->start to skip '+' - # skip whitespace - # read register into disp + # if (*word->start not in '+' '-') goto error4 + # read int into disp + # . EAX = next-hex-int(word) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8) + # . . call + e8/call next-hex-int/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # . EBX = EAX + 89/copy 3/mod/direct 3/rm32/EBX . . . 0/r32/EAX . . # copy EBX to EAX # skip whitespace + # . EAX = skip-chars-matching-whitespace-in-slice(word->start, word->end) + # . . push args + 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 skip-chars-matching-whitespace-in-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # . word->start = EAX + 89/copy 0/mod/indirect 6/rm32/ESI . . . 0/r32/EAX . . # copy EAX to *ESI # if (*word->start != ')') goto error5 $parse-effective-address:end: # return base in EAX @@ -1612,7 +1643,7 @@ $parse-effective-address:end: 5d/pop-to-EBP c3/return -# assumes 'in' starts with a register name, and returns its code +# assumes 'in' starts with a register name, and returns pointer to its code # side-effect: modifies 'in' to scan past the initial register name next-register: # in : (address slice) -> reg/EAX : int # . prolog @@ -1776,8 +1807,68 @@ test-parse-effective-address-base: 5d/pop-to-EBP c3/return -#? test-parse-effective-address-base-displacement: -#? +test-parse-effective-address-base-displacement: + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # var slice/ECX = "*(esi+3)" + b8/copy-to-EAX "*(esi+3)"/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 + # . ECX = {EAX, ECX} + 51/push-ECX + 50/push-EAX + 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX + # EAX, ECX, EDX, EBX = parse-effective-address(slice) + # . . push args + 51/push-ECX + # . . call + e8/call parse-effective-address/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # slice clobbered beyond this point + # check-ints-equal(EAX, 6, msg) + # . . push args + 68/push "F - test-parse-effective-address-base-displacement/base"/imm32 + 68/push 6/imm32/ESI + 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(ECX, 4, msg) + # . . push args + 68/push "F - test-parse-effective-address-base-displacement/index"/imm32 + 68/push 4/imm32/none + 51/push-ECX + # . . 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(EDX, 0, msg) + # . . push args + 68/push "F - test-parse-effective-address-base-displacement/scale"/imm32 + 68/push 0/imm32/none + 52/push-EDX + # . . 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(EBX, 3, msg) + # . . push args + 68/push "F - test-parse-effective-address-base-displacement/displacement"/imm32 + 68/push 3/imm32 + 53/push-EBX + # . . 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-parse-effective-address-base-index: #? #? test-parse-effective-address-base-index-scale: @@ -2307,6 +2398,455 @@ test-skip-until-close-paren-in-slice-stops-at-end: 5d/pop-to-EBP c3/return +# assumes 'in' starts with a '+' or '-', optional whitespace, and an unsigned integer +# returns the value of the integer +# side-effect: modifies 'in' to skip past the integer +next-hex-int: # in : (address slice) -> result/EAX + # . 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 + 53/push-EBX + 56/push-ESI + 57/push-EDI + # result/EDI = 0 + 31/xor 3/mod/direct 7/rm32/EDI . . . 7/r32/EDI . . # clear EDI + # ESI = in + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 8/disp8 . # copy *(EBP+8) to ESI + # EDX = in->end + 8b/copy 1/mod/*+disp8 6/rm32/ESI . . . 2/r32/EDX 4/disp8 . # copy *(ESI+4) to EDX + # curr/ECX = in->start + 8b/copy 0/mod/indirect 6/rm32/ESI . . . 1/r32/ECX . . # copy *ESI to ECX + # negate?/EBX = false + 31/xor 3/mod/direct 3/rm32/EBX . . . 3/r32/EBX . . # clear EBX + # EAX = *curr + 31/xor 3/mod/direct 0/rm32/EAX . . . 0/r32/EAX . . # clear EAX + 8a/copy-byte 0/mod/indirect 1/rm32/ECX . . . 0/r32/AL . . # copy byte at *ECX to AL +$next-hex-int:positive: + # if (*curr == '+') ++curr + 3d/compare-EAX-and 0x2b/imm32/+ + 75/jump-if-not-equal $next-hex-int:negative/disp8 + # . ++curr + 41/increment-ECX + eb/jump $next-hex-int:skip-whitespace/disp8 +$next-hex-int:negative: + # else if (*curr == '-') ++curr, negate = true + 3d/compare-EAX-and 0x2d/imm32/- + 75/jump-if-not-equal $next-hex-int:abort/disp8 + # . ++curr + 41/increment-ECX + # . negate = true + bb/copy-to-EBX 1/imm32/true + # fall through +$next-hex-int:skip-whitespace: + # spill EAX + 50/push-EAX + # EAX = skip-chars-matching-whitespace-in-slice(word->start, word->end) + # . . push args + 52/push-EDX + 51/push-ECX + # . . call + e8/call skip-chars-matching-whitespace-in-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # ECX = EAX + 89/copy 3/mod/direct 1/rm32/ECX . . . 0/r32/EAX . . # copy EAX to ECX + # restore EAX + 58/pop-to-EAX +$next-hex-int:initial-0: + # skip past leading '0x' + # . if (*curr != '0') jump to loop + 8a/copy-byte 0/mod/indirect 1/rm32/ECX . . . 0/r32/AL . . # copy byte at *ECX to AL + 3d/compare-EAX-and 0x30/imm32/0 + 75/jump-if-not-equal $next-hex-int:loop/disp8 + # . ++curr + 41/increment-ECX +$next-hex-int:initial-0x: + # . if (curr >= in->end) return result + 39/compare 3/mod/direct 1/rm32/ECX . . . 2/r32/EDX . . # compare ECX with EDX + 73/jump-if-greater-or-equal-unsigned $next-hex-int:end/disp8 + # . if (*curr != 'x') jump to loop # the previous '0' is still valid so doesn't need to be checked again + 31/xor 3/mod/direct 0/rm32/EAX . . . 0/r32/EAX . . # clear EAX + 8a/copy-byte 0/mod/indirect 1/rm32/ECX . . . 0/r32/AL . . # copy byte at *ECX to AL + 3d/compare-EAX-and 0x78/imm32/x + 75/jump-if-not-equal $next-hex-int:loop/disp8 + # . ++curr + 41/increment-ECX +$next-hex-int:loop: + # if (curr >= in->end) break + 39/compare 3/mod/direct 1/rm32/ECX . . . 2/r32/EDX . . # compare ECX with EDX + 73/jump-if-greater-or-equal-unsigned $next-hex-int:break/disp8 + # if (!is-hex-digit?(*curr)) break + # . EAX = *curr + 8a/copy-byte 0/mod/indirect 1/rm32/ECX . . . 0/r32/AL . . # copy byte at *ECX to AL + # . EAX = is-hex-digit?(*curr) + # . . push args + 50/push-EAX + # . . call + e8/call is-hex-digit?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # . if (EAX == 0) break + 3d/compare-EAX-and 0/imm32 + 74/jump-if-equal $next-hex-int:break/disp8 + # EAX = from-hex-char(*curr) + # . . copy arg to EAX + 8a/copy-byte 0/mod/indirect 1/rm32/ECX . . . 0/r32/AL . . # copy byte at *ECX to AL + # . . call + e8/call from-hex-char/disp32 + # result = result * 16 + EAX + c1/shift 4/subop/left 3/mod/direct 7/rm32/EDI . . . . . 4/imm8 # shift EDI left by 4 bits + 01/add 3/mod/direct 7/rm32/EDI . . . 0/r32/EAX . . # add EAX to EDI + # ++curr + 41/increment-ECX + # loop + eb/jump $next-hex-int:loop/disp8 +$next-hex-int:break: + 81 7/subop/compare 3/mod/direct 3/rm32/EBX . . . . . 0/imm32 # compare EBX + 74/jump-if-equal $next-hex-int:end/disp8 +$next-hex-int:negate: + f7 3/subop/negate 3/mod/direct 7/rm32/EDI . . . . . . # negate EDI +$next-hex-int:end: + # word->start = curr + 89/copy 0/mod/indirect 6/rm32/ESI . . . 1/r32/ECX . . # copy ECX to *ESI + # return EDI + 89/copy 3/mod/direct 0/rm32/EAX . . . 7/r32/EDI . . # copy EDI to EAX + # . restore registers + 5f/pop-to-EDI + 5e/pop-to-ESI + 5b/pop-to-EBX + 5a/pop-to-EDX + 59/pop-to-ECX + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +$next-hex-int:abort: + # . _write(2/stderr, error) + # . . push args + 68/push "next-hex-int: invalid hex char: "/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 + # . clear-stream(Stderr+4) + # . . save EAX + 50/push-EAX + # . . push args + b8/copy-to-EAX Stderr/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 + # . . restore EAX + 58/pop-to-EAX + # . print-int32-buffered(Stderr, EAX) + # . . push args + 50/push-EAX + 68/push Stderr/imm32 + # . . call + e8/call print-int32-buffered/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # . flush(Stderr) + # . . push args + 68/push Stderr/imm32 + # . . call + e8/call flush/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/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 + # . syscall(exit, 1) + bb/copy-to-EBX 1/imm32 + b8/copy-to-EAX 1/imm32/exit + cd/syscall 0x80/imm8 + # never gets here + +test-next-hex-int-single-digit: + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # (EAX..ECX) = "+a" + b8/copy-to-EAX "+a"/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 slice/ECX = {EAX, ECX} + 51/push-ECX + 50/push-EAX + 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX + # EAX = next-hex-int(slice) + # . . push args + 51/push-ECX + # . . call + e8/call next-hex-int/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 0xa, msg) + # . . push args + 68/push "F - test-next-hex-int-single-digit"/imm32 + 68/push 0xa/imm32 + 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-hex-int-multi-digit: + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # (EAX..ECX) = "+ 34a" + b8/copy-to-EAX "+ 34a"/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 slice/ECX = {EAX, ECX} + 51/push-ECX + 50/push-EAX + 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX + # EAX = next-hex-int(slice) + # . . push args + 51/push-ECX + # . . call + e8/call next-hex-int/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 0x34a, msg) + # . . push args + 68/push "F - test-next-hex-int-multi-digit"/imm32 + 68/push 0x34a/imm32 + 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-hex-int-0x-prefix: + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # (EAX..ECX) = "0x34" + b8/copy-to-EAX "+0x34"/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 slice/ECX = {EAX, ECX} + 51/push-ECX + 50/push-EAX + 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX + # EAX = next-hex-int(slice) + # . . push args + 51/push-ECX + # . . call + e8/call next-hex-int/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 0x34a, msg) + # . . push args + 68/push "F - test-next-hex-int-0x-prefix"/imm32 + 68/push 0x34/imm32 + 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-hex-int-zero: + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # (EAX..ECX) = "+0" + b8/copy-to-EAX "+0"/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 slice/ECX = {EAX, ECX} + 51/push-ECX + 50/push-EAX + 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX + # EAX = next-hex-int(slice) + # . . push args + 51/push-ECX + # . . call + e8/call next-hex-int/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 0x34a, msg) + # . . push args + 68/push "F - test-next-hex-int-zero"/imm32 + 68/push 0/imm32 + 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-hex-int-0-prefix: + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # (EAX..ECX) = "+ 03" + b8/copy-to-EAX "+ 03"/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 slice/ECX = {EAX, ECX} + 51/push-ECX + 50/push-EAX + 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX + # EAX = next-hex-int(slice) + # . . push args + 51/push-ECX + # . . call + e8/call next-hex-int/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 0x3, msg) + # . . push args + 68/push "F - test-next-hex-int-0-prefix"/imm32 + 68/push 0x3/imm32 + 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-hex-int-negative: + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # (EAX..ECX) = "-03" + b8/copy-to-EAX "-03"/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 slice/ECX = {EAX, ECX} + 51/push-ECX + 50/push-EAX + 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX + # EAX = next-hex-int(slice) + # . . push args + 51/push-ECX + # . . call + e8/call next-hex-int/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 0xfffffffd, msg) + # . . push args + 68/push "F - test-next-hex-int-negative"/imm32 + 68/push 0xfffffffd/imm32 + 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-hex-int-negative-with-space: + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # (EAX..ECX) = "- 03" + b8/copy-to-EAX "- 03"/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 slice/ECX = {EAX, ECX} + 51/push-ECX + 50/push-EAX + 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX + # EAX = next-hex-int(slice) + # . . push args + 51/push-ECX + # . . call + e8/call next-hex-int/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 0xfffffffd, msg) + # . . push args + 68/push "F - test-next-hex-int-negative-with-space"/imm32 + 68/push 0xfffffffd/imm32 + 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-hex-int-stop-at-non-hex: + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # (EAX..ECX) = "- 03)" + b8/copy-to-EAX "- 03)"/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 slice/ECX = {EAX, ECX} + 51/push-ECX + 50/push-EAX + 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX + # EAX = next-hex-int(slice) + # . . push args + 51/push-ECX + # . . call + e8/call next-hex-int/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 0xfffffffd, msg) + # . . push args + 68/push "F - test-next-hex-int-stop-at-non-hex"/imm32 + 68/push 0xfffffffd/imm32 + 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 + == data Registers: # (table string int) # a table is a stream diff --git a/apps/survey.subx b/apps/survey.subx index a7ff618b..d226ecc0 100644 --- a/apps/survey.subx +++ b/apps/survey.subx @@ -1214,6 +1214,7 @@ $compute-offsets:end: 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return + $compute-offsets:abort: # . _write(2/stderr, error) # . . push args |