From 14a380525ed2df295463b1906b718cb26871df3b Mon Sep 17 00:00:00 2001 From: Kartik Agaram Date: Fri, 30 Nov 2018 16:54:01 -0800 Subject: 4809 - subx: html with 5 colors for comments --- html/subx/examples/ex11.subx.html | 594 +++++++++++++++++++------------------- 1 file changed, 300 insertions(+), 294 deletions(-) (limited to 'html/subx/examples/ex11.subx.html') diff --git a/html/subx/examples/ex11.subx.html b/html/subx/examples/ex11.subx.html index 43d59d12..d4460ce5 100644 --- a/html/subx/examples/ex11.subx.html +++ b/html/subx/examples/ex11.subx.html @@ -11,15 +11,21 @@ @@ -54,7 +60,7 @@ if ('onhashchange' in window) { 
-  1 ## Null-terminated vs length-prefixed ascii strings.
+  1 # Null-terminated vs length-prefixed ascii strings.
   2 #
   3 # By default we create strings with a 4-byte length prefix rather than a null suffix.
   4 # However we still need null-prefixed strings when interacting with the Linux
@@ -71,339 +77,339 @@ if ('onhashchange' in window) {
  15 # would cause tests to not run, rather than to fail as we'd like.)
  16 
  17 == code
- 18 # instruction                     effective address                                                   operand     displacement    immediate
- 19 # op          subop               mod             rm32          base        index         scale       r32
- 20 # 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
+ 18 #   instruction                     effective address                                                   register    displacement    immediate
+ 19 # . op          subop               mod             rm32          base        index         scale       r32
+ 20 # . 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
  21 
  22 # main:
- 23   e8/call  run-tests/disp32  # 'run-tests' is a function created automatically by SubX. It calls all functions that start with 'test-'.
- 24   # syscall(exit, EAX)
- 25   89/copy                         3/mod/direct    3/rm32/EBX    .           .             .           0/r32/EAX   .               .                 # copy EAX to EBX
- 26   b8/copy-to-EAX  1/imm32
- 27   cd/syscall  0x80/imm8
+ 23     e8/call  run-tests/disp32  # 'run-tests' is a function created automatically by SubX. It calls all functions that start with 'test-'.
+ 24     # syscall(exit, EAX)
+ 25     89/copy                         3/mod/direct    3/rm32/EBX    .           .             .           0/r32/EAX   .               .                 # copy EAX to EBX
+ 26     b8/copy-to-EAX  1/imm32
+ 27     cd/syscall  0x80/imm8
  28 
  29 # compare a null-terminated ascii string with a more idiomatic length-prefixed byte array
  30 # reason for the name: the only place we should have null-terminated ascii strings is from commandline args
  31 kernel-string-equal:  # s : null-terminated ascii string, benchmark : length-prefixed ascii string -> EAX : boolean
- 32   # prolog
- 33   55/push-EBP
- 34   89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
- 35   # save registers
- 36   51/push-ECX
- 37   52/push-EDX
- 38   53/push-EBX
- 39   56/push-ESI
- 40   57/push-EDI
+ 32     # . prolog
+ 33     55/push-EBP
+ 34     89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
+ 35     # . save registers
+ 36     51/push-ECX
+ 37     52/push-EDX
+ 38     53/push-EBX
+ 39     56/push-ESI
+ 40     57/push-EDI
  41 
- 42   # pseudocode:
- 43   #   initialize n = b.length
- 44   #   initialize s1 = s
- 45   #   initialize s2 = b.data
- 46   #   i = 0
- 47   #   for (i = 0; i < n; ++n)
- 48   #     c1 = *s1
- 49   #     c2 = *s2
- 50   #     if c1 == 0
- 51   #       return false
- 52   #     if c1 != c2
- 53   #       return false
- 54   #   return *s1 == 0
- 55   # initialize s into EDI
- 56   8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           7/r32/EDI   8/disp8         .                 # copy *(EBP+8) to EDI
- 57   # initialize benchmark length n into EDX
- 58   8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           2/r32/EDX   0xc/disp8       .                 # copy *(EBP+12) to EDX
- 59   8b/copy                         0/mod/indirect  2/rm32/EDX    .           .             .           2/r32/EDX   .               .                 # copy *EDX to EDX
- 60   # initialize benchmark data into ESI
- 61   8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           6/r32/ESI   0xc/disp8       .                 # copy *(EBP+12) to ESI
- 62   81          0/subop/add         3/mod/direct    6/rm32/ESI    .           .             .           .           .               4/imm32           # add to ESI
- 63   # initialize loop counter i into ECX
- 64   b9/copy-to-ECX  0/imm32/exit
- 65   # while (i/ECX < n/EDX)
+ 42     # pseudocode:
+ 43     #   initialize n = b.length
+ 44     #   initialize s1 = s
+ 45     #   initialize s2 = b.data
+ 46     #   i = 0
+ 47     #   for (i = 0; i < n; ++n)
+ 48     #     c1 = *s1
+ 49     #     c2 = *s2
+ 50     #     if c1 == 0
+ 51     #       return false
+ 52     #     if c1 != c2
+ 53     #       return false
+ 54     #   return *s1 == 0
+ 55     # initialize s into EDI
+ 56     8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           7/r32/EDI   8/disp8         .                 # copy *(EBP+8) to EDI
+ 57     # initialize benchmark length n into EDX
+ 58     8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           2/r32/EDX   0xc/disp8       .                 # copy *(EBP+12) to EDX
+ 59     8b/copy                         0/mod/indirect  2/rm32/EDX    .           .             .           2/r32/EDX   .               .                 # copy *EDX to EDX
+ 60     # initialize benchmark data into ESI
+ 61     8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           6/r32/ESI   0xc/disp8       .                 # copy *(EBP+12) to ESI
+ 62     81          0/subop/add         3/mod/direct    6/rm32/ESI    .           .             .           .           .               4/imm32           # add to ESI
+ 63     # initialize loop counter i into ECX
+ 64     b9/copy-to-ECX  0/imm32/exit
+ 65     # while (i/ECX < n/EDX)
  66 $kernel-string-equal:loop:
- 67   39/compare                      3/mod/direct    1/rm32/ECX    .           .             .           2/r32/EDX   .               .                 # compare ECX with EDX
- 68   74/jump-if-equal  $kernel-string-equal:break/disp8
+ 67     39/compare                      3/mod/direct    1/rm32/ECX    .           .             .           2/r32/EDX   .               .                 # compare ECX with EDX
+ 68     74/jump-if-equal  $kernel-string-equal:break/disp8
  69     # c1/EAX, c2/EBX = *s, *benchmark
- 70   b8/copy-to-EAX  0/imm32
- 71   8a/copy                         0/mod/indirect  7/rm32/EDI    .           .             .           0/r32/EAX   .               .                 # copy byte at *EDI to lower byte of EAX
- 72   bb/copy-to-EBX  0/imm32
- 73   8a/copy                         0/mod/indirect  6/rm32/ESI    .           .             .           3/r32/EBX   .               .                 # copy byte at *ESI to lower byte of EBX
+ 70     b8/copy-to-EAX  0/imm32
+ 71     8a/copy                         0/mod/indirect  7/rm32/EDI    .           .             .           0/r32/EAX   .               .                 # copy byte at *EDI to lower byte of EAX
+ 72     bb/copy-to-EBX  0/imm32
+ 73     8a/copy                         0/mod/indirect  6/rm32/ESI    .           .             .           3/r32/EBX   .               .                 # copy byte at *ESI to lower byte of EBX
  74     # if (c1 == 0) return false
- 75   3d/compare-EAX  0/imm32
- 76   74/jump-if-equal  $kernel-string-equal:false/disp8
+ 75     3d/compare-EAX  0/imm32
+ 76     74/jump-if-equal  $kernel-string-equal:false/disp8
  77     # if (c1 != c2) return false
- 78   39/compare                      3/mod/direct    0/rm32/EAX    .           .             .           3/r32/EBX   .               .                 # compare EAX with EBX
- 79   75/jump-if-not-equal  $kernel-string-equal:false/disp8
+ 78     39/compare                      3/mod/direct    0/rm32/EAX    .           .             .           3/r32/EBX   .               .                 # compare EAX with EBX
+ 79     75/jump-if-not-equal  $kernel-string-equal:false/disp8
  80     # ++s1, ++s2, ++i
- 81   41/inc-ECX
- 82   46/inc-ESI
- 83   47/inc-EDI
- 84   # end while
- 85   eb/jump  $kernel-string-equal:loop/disp8
+ 81     41/inc-ECX
+ 82     46/inc-ESI
+ 83     47/inc-EDI
+ 84     # end while
+ 85     eb/jump  $kernel-string-equal:loop/disp8
  86 $kernel-string-equal:break:
- 87   # if (*s/EDI == 0) return true
- 88   b8/copy-to-EAX  0/imm32
- 89   8a/copy                         0/mod/indirect  7/rm32/EDI    .           .             .           0/r32/EAX   .               .                 # copy byte at *EDI to lower byte of EAX
- 90   81          7/subop/compare     3/mod/direct    0/rm32/EAX    .           .             .           .           .               0/imm32           # compare EAX
- 91   75/jump-if-not-equal  $kernel-string-equal:false/disp8
- 92   b8/copy-to-EAX  1/imm32
+ 87     # if (*s/EDI == 0) return true
+ 88     b8/copy-to-EAX  0/imm32
+ 89     8a/copy                         0/mod/indirect  7/rm32/EDI    .           .             .           0/r32/EAX   .               .                 # copy byte at *EDI to lower byte of EAX
+ 90     81          7/subop/compare     3/mod/direct    0/rm32/EAX    .           .             .           .           .               0/imm32           # compare EAX
+ 91     75/jump-if-not-equal  $kernel-string-equal:false/disp8
+ 92     b8/copy-to-EAX  1/imm32
  93 $kernel-string-equal:true:
- 94   eb/jump  $kernel-string-equal:end/disp8
- 95   # return false
+ 94     eb/jump  $kernel-string-equal:end/disp8
+ 95     # return false
  96 $kernel-string-equal:false:
- 97   b8/copy-to-EAX  0/imm32
+ 97     b8/copy-to-EAX  0/imm32
  98 
  99 $kernel-string-equal:end:
-100   # restore registers
-101   5f/pop-to-EDI
-102   5e/pop-to-ESI
-103   5b/pop-to-EBX
-104   5a/pop-to-EDX
-105   59/pop-to-ECX
-106   # end
-107   89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
-108   5d/pop-to-EBP
-109   c3/return
+100     # . restore registers
+101     5f/pop-to-EDI
+102     5e/pop-to-ESI
+103     5b/pop-to-EBX
+104     5a/pop-to-EDX
+105     59/pop-to-ECX
+106     # end
+107     89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
+108     5d/pop-to-EBP
+109     c3/return
 110 
-111 ## tests
+111 # - tests
 112 
 113 test-compare-null-kernel-string-with-empty-array:
-114   # EAX = kernel-string-equal(Null-kernel-string, "")
-115     # push args
-116   68/push  ""/imm32
-117   68/push  Null-kernel-string/imm32
-118     # call
-119   e8/call  kernel-string-equal/disp32
-120     # discard args
-121   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
-122   # call check-ints-equal(EAX, 1, msg)
-123     # push args
-124   68/push  "F - test-compare-null-kernel-string-with-empty-array"/imm32
-125   68/push  1/imm32/true
-126   50/push-EAX
-127     # call
-128   e8/call  check-ints-equal/disp32
-129     # discard args
-130   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
-131   c3/return
+114     # EAX = kernel-string-equal(Null-kernel-string, "")
+115     # . . push args
+116     68/push  ""/imm32
+117     68/push  Null-kernel-string/imm32
+118     # . . call
+119     e8/call  kernel-string-equal/disp32
+120     # . . discard args
+121     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
+122     # check-ints-equal(EAX, 1, msg)
+123     # . . push args
+124     68/push  "F - test-compare-null-kernel-string-with-empty-array"/imm32
+125     68/push  1/imm32/true
+126     50/push-EAX
+127     # . . call
+128     e8/call  check-ints-equal/disp32
+129     # . . discard args
+130     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
+131     c3/return
 132 
 133 test-compare-null-kernel-string-with-non-empty-array:
-134   # EAX = kernel-string-equal(Null-kernel-string, "Abc")
-135     # push args
-136   68/push  "Abc"/imm32
-137   68/push  Null-kernel-string/imm32
-138     # call
-139   e8/call  kernel-string-equal/disp32
-140     # discard args
-141   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
-142   # call check-ints-equal(EAX, 0, msg)
-143     # push args
-144   68/push  "F - test-compare-null-kernel-string-with-non-empty-array"/imm32
-145   68/push  0/imm32/false
-146   50/push-EAX
-147     # call
-148   e8/call  check-ints-equal/disp32
-149     # discard args
-150   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
-151   c3/return
+134     # EAX = kernel-string-equal(Null-kernel-string, "Abc")
+135     # . . push args
+136     68/push  "Abc"/imm32
+137     68/push  Null-kernel-string/imm32
+138     # . . call
+139     e8/call  kernel-string-equal/disp32
+140     # . . discard args
+141     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
+142     # check-ints-equal(EAX, 0, msg)
+143     # . . push args
+144     68/push  "F - test-compare-null-kernel-string-with-non-empty-array"/imm32
+145     68/push  0/imm32/false
+146     50/push-EAX
+147     # . . call
+148     e8/call  check-ints-equal/disp32
+149     # . . discard args
+150     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
+151     c3/return
 152 
 153 test-compare-kernel-string-with-equal-array:
-154   # EAX = kernel-string-equal(Abc-kernel-string, "Abc")
-155     # push args
-156   68/push  "Abc"/imm32
-157   68/push  Abc-kernel-string/imm32
-158     # call
-159   e8/call  kernel-string-equal/disp32
-160     # discard args
-161   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
-162   # call check-ints-equal(EAX, 1, msg)
-163     # push args
-164   68/push  "F - test-compare-kernel-string-with-equal-array"/imm32
-165   68/push  1/imm32/true
-166   50/push-EAX
-167     # call
-168   e8/call  check-ints-equal/disp32
-169     # discard args
-170   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
-171   c3/return
+154     # EAX = kernel-string-equal(Abc-kernel-string, "Abc")
+155     # . . push args
+156     68/push  "Abc"/imm32
+157     68/push  Abc-kernel-string/imm32
+158     # . . call
+159     e8/call  kernel-string-equal/disp32
+160     # . . discard args
+161     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
+162     # check-ints-equal(EAX, 1, msg)
+163     # . . push args
+164     68/push  "F - test-compare-kernel-string-with-equal-array"/imm32
+165     68/push  1/imm32/true
+166     50/push-EAX
+167     # . . call
+168     e8/call  check-ints-equal/disp32
+169     # . . discard args
+170     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
+171     c3/return
 172 
 173 test-compare-kernel-string-with-inequal-array:
-174   # EAX = kernel-string-equal(Abc-kernel-string, "Adc")
-175     # push args
-176   68/push  "Adc"/imm32
-177   68/push  Abc-kernel-string/imm32
-178     # call
-179   e8/call  kernel-string-equal/disp32
-180     # discard args
-181   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
-182   # call check-ints-equal(EAX, 0, msg)
-183     # push args
-184   68/push  "F - test-compare-kernel-string-with-equal-array"/imm32
-185   68/push  0/imm32/false
-186   50/push-EAX
-187     # call
-188   e8/call  check-ints-equal/disp32
-189     # discard args
-190   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
-191   c3/return
+174     # EAX = kernel-string-equal(Abc-kernel-string, "Adc")
+175     # . . push args
+176     68/push  "Adc"/imm32
+177     68/push  Abc-kernel-string/imm32
+178     # . . call
+179     e8/call  kernel-string-equal/disp32
+180     # . . discard args
+181     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
+182     # check-ints-equal(EAX, 0, msg)
+183     # . . push args
+184     68/push  "F - test-compare-kernel-string-with-equal-array"/imm32
+185     68/push  0/imm32/false
+186     50/push-EAX
+187     # . . call
+188     e8/call  check-ints-equal/disp32
+189     # . . discard args
+190     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
+191     c3/return
 192 
 193 test-compare-kernel-string-with-empty-array:
-194   # EAX = kernel-string-equal(Abc-kernel-string, "")
-195     # push args
-196   68/push  ""/imm32
-197   68/push  Abc-kernel-string/imm32
-198     # call
-199   e8/call  kernel-string-equal/disp32
-200     # discard args
-201   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
-202   # call check-ints-equal(EAX, 0)
-203     # push args
-204   68/push  "F - test-compare-kernel-string-with-equal-array"/imm32
-205   68/push  0/imm32/false
-206   50/push-EAX
-207     # call
-208   e8/call  check-ints-equal/disp32
-209     # discard args
-210   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
-211   c3/return
+194     # EAX = kernel-string-equal(Abc-kernel-string, "")
+195     # . . push args
+196     68/push  ""/imm32
+197     68/push  Abc-kernel-string/imm32
+198     # . . call
+199     e8/call  kernel-string-equal/disp32
+200     # . . discard args
+201     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
+202     # check-ints-equal(EAX, 0)
+203     # . . push args
+204     68/push  "F - test-compare-kernel-string-with-equal-array"/imm32
+205     68/push  0/imm32/false
+206     50/push-EAX
+207     # . . call
+208     e8/call  check-ints-equal/disp32
+209     # . . discard args
+210     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
+211     c3/return
 212 
 213 test-compare-kernel-string-with-shorter-array:
-214   # EAX = kernel-string-equal(Abc-kernel-string, "Ab")
-215     # push args
-216   68/push  "Ab"/imm32
-217   68/push  Abc-kernel-string/imm32
-218     # call
-219   e8/call  kernel-string-equal/disp32
-220     # discard args
-221   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
-222   # call check-ints-equal(EAX, 0)
-223     # push args
-224   68/push  "F - test-compare-kernel-string-with-shorter-array"/imm32
-225   68/push  0/imm32/false
-226   50/push-EAX
-227     # call
-228   e8/call  check-ints-equal/disp32
-229     # discard args
-230   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
-231   c3/return
+214     # EAX = kernel-string-equal(Abc-kernel-string, "Ab")
+215     # . . push args
+216     68/push  "Ab"/imm32
+217     68/push  Abc-kernel-string/imm32
+218     # . . call
+219     e8/call  kernel-string-equal/disp32
+220     # . . discard args
+221     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
+222     # check-ints-equal(EAX, 0)
+223     # . . push args
+224     68/push  "F - test-compare-kernel-string-with-shorter-array"/imm32
+225     68/push  0/imm32/false
+226     50/push-EAX
+227     # . . call
+228     e8/call  check-ints-equal/disp32
+229     # . . discard args
+230     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
+231     c3/return
 232 
 233 test-compare-kernel-string-with-longer-array:
-234   # EAX = kernel-string-equal(Abc-kernel-string, "Abcd")
-235     # push args
-236   68/push  "Abcd"/imm32
-237   68/push  Abc-kernel-string/imm32
-238     # call
-239   e8/call  kernel-string-equal/disp32
-240     # discard args
-241   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
-242   # call check-ints-equal(EAX, 0)
-243     # push args
-244   68/push  "F - test-compare-kernel-string-with-longer-array"/imm32
-245   68/push  0/imm32/false
-246   50/push-EAX
-247     # call
-248   e8/call  check-ints-equal/disp32
-249     # discard args
-250   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
-251   c3/return
+234     # EAX = kernel-string-equal(Abc-kernel-string, "Abcd")
+235     # . . push args
+236     68/push  "Abcd"/imm32
+237     68/push  Abc-kernel-string/imm32
+238     # . . call
+239     e8/call  kernel-string-equal/disp32
+240     # . . discard args
+241     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
+242     # check-ints-equal(EAX, 0)
+243     # . . push args
+244     68/push  "F - test-compare-kernel-string-with-longer-array"/imm32
+245     68/push  0/imm32/false
+246     50/push-EAX
+247     # . . call
+248     e8/call  check-ints-equal/disp32
+249     # . . discard args
+250     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
+251     c3/return
 252 
-253 ## helpers
+253 # - helpers
 254 
 255 # print msg to stderr if a != b, otherwise print "."
 256 check-ints-equal:  # (a : int, b : int, msg : (address array byte)) -> boolean
-257   # prolog
-258   55/push-EBP
-259   89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
-260   # save registers
-261   51/push-ECX
-262   53/push-EBX
-263   # load args into EAX, EBX and ECX
-264   8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           0/r32/EAX   0x8/disp8       .                 # copy *(EBP+8) to EAX
-265   8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           3/r32/EBX   0xc/disp8       .                 # copy *(EBP+12) to EBX
-266   # if EAX == b/EBX
-267   39/compare                      3/mod/direct    0/rm32/EAX    .           .             .           3/r32/EBX   .               .                 # compare EAX and EBX
-268   75/jump-if-unequal  $check-ints-equal:else/disp8
-269     # print('.')
-270       # push args
-271   68/push  "."/imm32
-272       # call
-273   e8/call  write-stderr/disp32
-274       # discard args
-275   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
-276     # return
-277   eb/jump  $check-ints-equal:end/disp8
-278   # else:
+257     # . prolog
+258     55/push-EBP
+259     89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
+260     # . save registers
+261     51/push-ECX
+262     53/push-EBX
+263     # load args into EAX, EBX and ECX
+264     8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           0/r32/EAX   0x8/disp8       .                 # copy *(EBP+8) to EAX
+265     8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           3/r32/EBX   0xc/disp8       .                 # copy *(EBP+12) to EBX
+266     # if EAX == b/EBX print('.') and return
+267     39/compare                      3/mod/direct    0/rm32/EAX    .           .             .           3/r32/EBX   .               .                 # compare EAX and EBX
+268     75/jump-if-unequal  $check-ints-equal:else/disp8
+269     # . write-stderr('.')
+270     # . . push args
+271     68/push  "."/imm32
+272     # . . call
+273     e8/call  write-stderr/disp32
+274     # . . discard args
+275     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
+276     # . return
+277     eb/jump  $check-ints-equal:end/disp8
+278     # otherwise print(msg)
 279 $check-ints-equal:else:
-280   # copy msg into ECX
-281   8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           1/r32/ECX   0x10/disp8       .                # copy *(EBP+16) to ECX
+280     # copy msg into ECX
+281     8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           1/r32/ECX   0x10/disp8       .                # copy *(EBP+16) to ECX
 282     # print(ECX)
-283       # push args
-284   51/push-ECX
-285       # call
-286   e8/call  write-stderr/disp32
-287       # discard args
-288   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
+283     # . . push args
+284     51/push-ECX
+285     # . . call
+286     e8/call  write-stderr/disp32
+287     # . . discard args
+288     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
 289     # print newline
-290       # push args
-291   68/push  Newline/imm32
-292       # call
-293   e8/call  write-stderr/disp32
-294       # discard args
-295   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
+290     # . . push args
+291     68/push  Newline/imm32
+292     # . . call
+293     e8/call  write-stderr/disp32
+294     # . . discard args
+295     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
 296 $check-ints-equal:end:
-297   # restore registers
-298   5b/pop-to-EBX
-299   59/pop-to-ECX
-300   # end
-301   89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
-302   5d/pop-to-EBP
-303   c3/return
+297     # . restore registers
+298     5b/pop-to-EBX
+299     59/pop-to-ECX
+300     # end
+301     89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
+302     5d/pop-to-EBP
+303     c3/return
 304 
 305 write-stderr:  # s : (address array byte) -> <void>
-306   # prolog
-307   55/push-EBP
-308   89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
-309   # save registers
-310   50/push-EAX
-311   51/push-ECX
-312   52/push-EDX
-313   53/push-EBX
-314   # syscall(write, 2/stderr, (data) s+4, (size) *s)
-315     # fd = 2 (stderr)
-316   bb/copy-to-EBX  2/imm32
-317     # x = s+4
-318   8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           1/r32/ECX   8/disp8         .                 # copy *(EBP+8) to ECX
-319   81          0/subop/add         3/mod/direct    1/rm32/ECX    .           .             .           .           .               4/imm32           # add to ECX
-320     # size = *s
-321   8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           2/r32/EDX   8/disp8         .                 # copy *(EBP+8) to EDX
-322   8b/copy                         0/mod/indirect  2/rm32/EDX    .           .             .           2/r32/EDX   .               .                 # copy *EDX to EDX
-323     # syscall
-324   b8/copy-to-EAX  4/imm32/write
-325   cd/syscall  0x80/imm8
-326   # restore registers
-327   5b/pop-to-EBX
-328   5a/pop-to-EDX
-329   59/pop-to-ECX
-330   58/pop-to-EAX
-331   # end
-332   89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
-333   5d/pop-to-EBP
-334   c3/return
+306     # . prolog
+307     55/push-EBP
+308     89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
+309     # . save registers
+310     50/push-EAX
+311     51/push-ECX
+312     52/push-EDX
+313     53/push-EBX
+314     # syscall(write, 2/stderr, (data) s+4, (size) *s)
+315     # . . fd = 2 (stderr)
+316     bb/copy-to-EBX  2/imm32
+317     # . . x = s+4
+318     8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           1/r32/ECX   8/disp8         .                 # copy *(EBP+8) to ECX
+319     81          0/subop/add         3/mod/direct    1/rm32/ECX    .           .             .           .           .               4/imm32           # add to ECX
+320     # . . size = *s
+321     8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           2/r32/EDX   8/disp8         .                 # copy *(EBP+8) to EDX
+322     8b/copy                         0/mod/indirect  2/rm32/EDX    .           .             .           2/r32/EDX   .               .                 # copy *EDX to EDX
+323     # . . syscall
+324     b8/copy-to-EAX  4/imm32/write
+325     cd/syscall  0x80/imm8
+326     # . restore registers
+327     5b/pop-to-EBX
+328     5a/pop-to-EDX
+329     59/pop-to-ECX
+330     58/pop-to-EAX
+331     # . end
+332     89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
+333     5d/pop-to-EBP
+334     c3/return
 335 
 336 == data
 337 
-338 Newline:
-339   # size
-340   01 00 00 00
-341   # data
-342   0a/newline
+338 Newline:
+339     # size
+340     01 00 00 00
+341     # data
+342     0a/newline
 343 
 344 # for kernel-string-equal tests
-345 Null-kernel-string:
-346   00/null
-347 Abc-kernel-string:
-348   41/A 62/b 63/c 00/null
+345 Null-kernel-string:
+346     00/null
+347 Abc-kernel-string:
+348     41/A 62/b 63/c 00/null
 349 
-350 # vim:nowrap:textwidth=0
+350 # . . vim:nowrap:textwidth=0
-- cgit 1.4.1-2-gfad0