4667

Standardize on hyphens in all names.
And we'll use colons for namespacing labels in functions.

6 files changed, 98 insertions, 96 deletions

diff --git a/subx/examples/ex10.subx b/subx/examples/ex10.subx
index f2eadc5d..43b0e1d1 100644
--- a/subx/examples/ex10.subx
+++ b/subx/examples/ex10.subx
@@ -12,7 +12,7 @@
 # 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
 
-# main: return argv_equal(argv[1], argv[2])
+# main: return argv-equal(argv[1], argv[2])
 #       At the start of a SubX program:
 #         argc: *ESP
 #         argv[0]: *(ESP+4)
@@ -20,13 +20,13 @@
 #         ...
   # prolog
   89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
-  # call argv_equal(argv[1], argv[2])
+  # call argv-equal(argv[1], argv[2])
     # push argv[2]
   ff          6/subop/push        1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           .           0xc/disp8       .                 # push *(EBP+12)
     # push argv[1]
   ff          6/subop/push        1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           .           0x8/disp8       .                 # push *(EBP+8)
     # call
-  e8/call argv_equal/disp32
+  e8/call argv-equal/disp32
   # exit(EAX)
 $exit:
   89/copy                         3/mod/direct    3/rm32/EBX    .           .             .           0/r32/EAX   .               .                 # copy EAX to EBX
@@ -35,12 +35,12 @@ $exit:
 
 # compare two null-terminated ascii strings
 # reason for the name: the only place we should have null-terminated ascii strings is from commandline args
-argv_equal:  # (s1, s2) : null-terminated ascii strings -> EAX : boolean
+argv-equal:  # (s1, s2) : null-terminated ascii strings -> EAX : boolean
   # initialize s1 (ECX) and s2 (EDX)
   8b/copy                         1/mod/*+disp8   4/rm32/sib    4/base/ESP  4/index/none  .           1/r32/ECX   4/disp8         .                 # copy *(ESP+4) to ECX
   8b/copy                         1/mod/*+disp8   4/rm32/sib    4/base/ESP  4/index/none  .           2/r32/EDX   8/disp8         .                 # copy *(ESP+8) to EDX
   # while (true)
-$argv_loop:
+$argv-equal:loop:
     # c1/EAX, c2/EBX = *s1, *s2
   b8/copy  0/imm32  # clear EAX
   8a/copy                         0/mod/indirect  1/rm32/ECX    .           .             .           0/r32/EAX   .               .                 # copy byte at *ECX to lower byte of EAX
@@ -48,23 +48,24 @@ $argv_loop:
   8a/copy                         0/mod/indirect  2/rm32/EDX    .           .             .           3/r32/EBX   .               .                 # copy byte at *EDX to lower byte of EBX
     # if (c1 == 0) break
   3d/compare-EAX  0/imm32
-  74/jump-if-equal  $argv_break/disp8
+  74/jump-if-equal  $argv-equal:break/disp8
     # if (c1 != c2) return false
   39/compare                      3/mod/direct    0/rm32/EAX    .           .             .           3/r32/EBX   .               .                 # compare EAX with EBX
-  75/jump-if-not-equal  $argv_fail/disp8
+  75/jump-if-not-equal  $argv-equal:false/disp8
     # ++s1, ++s2
   41/inc-ECX
   42/inc-EDX
   # end while
-  eb/jump  $argv_loop/disp8
-$argv_break:
+  eb/jump  $argv-equal:loop/disp8
+$argv-equal:break:
   # if (c2 == 0) return true
   81          7/subop/compare     3/mod/direct    3/rm32/EBX    .           .             .           .           .               0/imm32           # compare EBX
-  75/jump-if-not-equal  $argv_fail/disp8
+  75/jump-if-not-equal  $argv-equal:false/disp8
+$argv-equal:success:
   b8/copy                         .               .             .           .             .           .           .               1/imm32           # copy to EAX
   c3/return
   # return false
-$argv_fail:
+$argv-equal:false:
   b8/copy                         .               .             .           .             .           .           .               0/imm32           # copy to EAX
   c3/return
 
diff --git a/subx/examples/ex11 b/subx/examples/ex11
index cf0d0c85..f4329e00 100755
--- a/subx/examples/ex11
+++ b/subx/examples/ex11
Binary files differdiff --git a/subx/examples/ex11.subx b/subx/examples/ex11.subx
index defab46b..2ffdaad3 100644
--- a/subx/examples/ex11.subx
+++ b/subx/examples/ex11.subx
@@ -21,7 +21,7 @@
 # 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
 
 # main:
-  e8/call  run_tests/disp32  # 'run_tests' is a function created automatically by SubX. It calls all functions that start with 'test_'.
+  e8/call  run-tests/disp32  # 'run-tests' is a function created automatically by SubX. It calls all functions that start with 'test-'.
   # exit(EAX)
   89/copy                         3/mod/direct    3/rm32/EBX    .           .             .           0/r32/EAX   .               .                 # copy EAX to EBX
   b8/copy                         .               .             .           .             .           .           .               1/imm32           # copy to EAX
@@ -29,7 +29,7 @@
 
 # compare a null-terminated ascii string with a more idiomatic length-prefixed byte array
 # reason for the name: the only place we should have null-terminated ascii strings is from commandline args
-kernel_string_equal:  # s : null-terminated ascii string, benchmark : length-prefixed ascii string -> EAX : boolean
+kernel-string-equal:  # s : null-terminated ascii string, benchmark : length-prefixed ascii string -> EAX : boolean
   # prolog
   55/push-EBP
   89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
@@ -64,9 +64,9 @@ kernel_string_equal:  # s : null-terminated ascii string, benchmark : length-pre
   # initialize loop counter i into ECX
   b9/copy                         .               .             .           .             .           .           .               0/imm32/exit      # copy to ECX
   # while (i/ECX < n/EDX)
-$kernel_string_loop:
+$kernel-string-equal:loop:
   39/compare                      3/mod/direct    1/rm32/ECX    .           .             .           2/r32/EDX   .               .                 # compare ECX with EDX
-  74/jump-if-equal  $kernel_string_break/disp8
+  74/jump-if-equal  $kernel-string-equal:break/disp8
     # c1/EAX, c2/EBX = *s, *benchmark
   b8/copy  0/imm32  # clear EAX
   8a/copy                         0/mod/indirect  7/rm32/EDI    .           .             .           0/r32/EAX   .               .                 # copy byte at *EDI to lower byte of EAX
@@ -74,29 +74,30 @@ $kernel_string_loop:
   8a/copy                         0/mod/indirect  6/rm32/ESI    .           .             .           3/r32/EBX   .               .                 # copy byte at *ESI to lower byte of EBX
     # if (c1 == 0) return false
   3d/compare-EAX  0/imm32
-  74/jump-if-equal  $kernel_string_fail/disp8
+  74/jump-if-equal  $kernel-string-equal:false/disp8
     # if (c1 != c2) return false
   39/compare                      3/mod/direct    0/rm32/EAX    .           .             .           3/r32/EBX   .               .                 # compare EAX with EBX
-  75/jump-if-not-equal  $kernel_string_fail/disp8
+  75/jump-if-not-equal  $kernel-string-equal:false/disp8
     # ++s1, ++s2, ++i
   41/inc-ECX
   46/inc-ESI
   47/inc-EDI
   # end while
-  eb/jump  $kernel_string_loop/disp8
-$kernel_string_break:
+  eb/jump  $kernel-string-equal:loop/disp8
+$kernel-string-equal:break:
   # if (*s/EDI == 0) return true
   b8/copy  0/imm32  # clear EAX
   8a/copy                         0/mod/indirect  7/rm32/EDI    .           .             .           0/r32/EAX   .               .                 # copy byte at *EDI to lower byte of EAX
   81          7/subop/compare     3/mod/direct    0/rm32/EAX    .           .             .           .           .               0/imm32           # compare EAX
-  75/jump-if-not-equal  $kernel_string_fail/disp8
+  75/jump-if-not-equal  $kernel-string-equal:false/disp8
   b8/copy                         .               .             .           .             .           .           .               1/imm32           # copy to EAX
-  eb/jump  $kernel_string_end/disp8
+$kernel-string-equal:true:
+  eb/jump  $kernel-string-equal:end/disp8
   # return false
-$kernel_string_fail:
+$kernel-string-equal:false:
   b8/copy                         .               .             .           .             .           .           .               0/imm32           # copy to EAX
 
-$kernel_string_end:
+$kernel-string-equal:end:
   # restore registers
   5f/pop-to-EDI
   5e/pop-to-ESI
@@ -110,142 +111,142 @@ $kernel_string_end:
 
 ## tests
 
-test_compare_null_kernel_string_with_empty_array:
-  # EAX = kernel_string_equal(Null_kernel_string, "")
+test-compare-null-kernel-string-with-empty-array:
+  # EAX = kernel-string-equal(Null-kernel-string, "")
     # push args
   68/push  ""/imm32
-  68/push  Null_kernel_string/imm32
+  68/push  Null-kernel-string/imm32
     # call
-  e8/call  kernel_string_equal/disp32
+  e8/call  kernel-string-equal/disp32
     # discard args
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
-  # call check_ints_equal(EAX, 1, msg)
+  # call check-ints-equal(EAX, 1, msg)
     # push args
-  68/push  "F - test_compare_null_kernel_string_with_empty_array"/imm32
+  68/push  "F - test-compare-null-kernel-string-with-empty-array"/imm32
   68/push  1/imm32/true
   50/push-EAX
     # call
-  e8/call  check_ints_equal/disp32
+  e8/call  check-ints-equal/disp32
     # discard args
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
   c3/return
 
-test_compare_null_kernel_string_with_non_empty_array:
-  # EAX = kernel_string_equal(Null_kernel_string, "Abc")
+test-compare-null-kernel-string-with-non-empty-array:
+  # EAX = kernel-string-equal(Null-kernel-string, "Abc")
     # push args
   68/push  "Abc"/imm32
-  68/push  Null_kernel_string/imm32
+  68/push  Null-kernel-string/imm32
     # call
-  e8/call  kernel_string_equal/disp32
+  e8/call  kernel-string-equal/disp32
     # discard args
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
-  # call check_ints_equal(EAX, 0, msg)
+  # call check-ints-equal(EAX, 0, msg)
     # push args
-  68/push  "F - test_compare_null_kernel_string_with_non_empty_array"/imm32
+  68/push  "F - test-compare-null-kernel-string-with-non-empty-array"/imm32
   68/push  0/imm32/false
   50/push-EAX
     # call
-  e8/call  check_ints_equal/disp32
+  e8/call  check-ints-equal/disp32
     # discard args
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
   c3/return
 
-test_compare_kernel_string_with_equal_array:
-  # EAX = kernel_string_equal(Abc_kernel_string, "Abc")
+test-compare-kernel-string-with-equal-array:
+  # EAX = kernel-string-equal(Abc-kernel-string, "Abc")
     # push args
   68/push  "Abc"/imm32
-  68/push  Abc_kernel_string/imm32
+  68/push  Abc-kernel-string/imm32
     # call
-  e8/call  kernel_string_equal/disp32
+  e8/call  kernel-string-equal/disp32
     # discard args
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
-  # call check_ints_equal(EAX, 1, msg)
+  # call check-ints-equal(EAX, 1, msg)
     # push args
-  68/push  "F - test_compare_kernel_string_with_equal_array"/imm32
+  68/push  "F - test-compare-kernel-string-with-equal-array"/imm32
   68/push  1/imm32/true
   50/push-EAX
     # call
-  e8/call  check_ints_equal/disp32
+  e8/call  check-ints-equal/disp32
     # discard args
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
   c3/return
 
-test_compare_kernel_string_with_inequal_array:
-  # EAX = kernel_string_equal(Abc_kernel_string, "Adc")
+test-compare-kernel-string-with-inequal-array:
+  # EAX = kernel-string-equal(Abc-kernel-string, "Adc")
     # push args
   68/push  "Adc"/imm32
-  68/push  Abc_kernel_string/imm32
+  68/push  Abc-kernel-string/imm32
     # call
-  e8/call  kernel_string_equal/disp32
+  e8/call  kernel-string-equal/disp32
     # discard args
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
-  # call check_ints_equal(EAX, 0, msg)
+  # call check-ints-equal(EAX, 0, msg)
     # push args
-  68/push  "F - test_compare_kernel_string_with_equal_array"/imm32
+  68/push  "F - test-compare-kernel-string-with-equal-array"/imm32
   68/push  0/imm32/false
   50/push-EAX
     # call
-  e8/call  check_ints_equal/disp32
+  e8/call  check-ints-equal/disp32
     # discard args
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
   c3/return
 
-test_compare_kernel_string_with_empty_array:
-  # EAX = kernel_string_equal(Abc_kernel_string, "")
+test-compare-kernel-string-with-empty-array:
+  # EAX = kernel-string-equal(Abc-kernel-string, "")
     # push args
   68/push  ""/imm32
-  68/push  Abc_kernel_string/imm32
+  68/push  Abc-kernel-string/imm32
     # call
-  e8/call  kernel_string_equal/disp32
+  e8/call  kernel-string-equal/disp32
     # discard args
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
-  # call check_ints_equal(EAX, 0)
+  # call check-ints-equal(EAX, 0)
     # push args
-  68/push  "F - test_compare_kernel_string_with_equal_array"/imm32
+  68/push  "F - test-compare-kernel-string-with-equal-array"/imm32
   68/push  0/imm32/false
   50/push-EAX
     # call
-  e8/call  check_ints_equal/disp32
+  e8/call  check-ints-equal/disp32
     # discard args
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
   c3/return
 
-test_compare_kernel_string_with_shorter_array:
-  # EAX = kernel_string_equal(Abc_kernel_string, "Ab")
+test-compare-kernel-string-with-shorter-array:
+  # EAX = kernel-string-equal(Abc-kernel-string, "Ab")
     # push args
   68/push  "Ab"/imm32
-  68/push  Abc_kernel_string/imm32
+  68/push  Abc-kernel-string/imm32
     # call
-  e8/call  kernel_string_equal/disp32
+  e8/call  kernel-string-equal/disp32
     # discard args
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
-  # call check_ints_equal(EAX, 0)
+  # call check-ints-equal(EAX, 0)
     # push args
-  68/push  "F - test_compare_kernel_string_with_shorter_array"/imm32
+  68/push  "F - test-compare-kernel-string-with-shorter-array"/imm32
   68/push  0/imm32/false
   50/push-EAX
     # call
-  e8/call  check_ints_equal/disp32
+  e8/call  check-ints-equal/disp32
     # discard args
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
   c3/return
 
-test_compare_kernel_string_with_longer_array:
-  # EAX = kernel_string_equal(Abc_kernel_string, "Abcd")
+test-compare-kernel-string-with-longer-array:
+  # EAX = kernel-string-equal(Abc-kernel-string, "Abcd")
     # push args
   68/push  "Abcd"/imm32
-  68/push  Abc_kernel_string/imm32
+  68/push  Abc-kernel-string/imm32
     # call
-  e8/call  kernel_string_equal/disp32
+  e8/call  kernel-string-equal/disp32
     # discard args
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
-  # call check_ints_equal(EAX, 0)
+  # call check-ints-equal(EAX, 0)
     # push args
-  68/push  "F - test_compare_kernel_string_with_longer_array"/imm32
+  68/push  "F - test-compare-kernel-string-with-longer-array"/imm32
   68/push  0/imm32/false
   50/push-EAX
     # call
-  e8/call  check_ints_equal/disp32
+  e8/call  check-ints-equal/disp32
     # discard args
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
   c3/return
@@ -253,7 +254,7 @@ test_compare_kernel_string_with_longer_array:
 ## helpers
 
 # print msg to stderr if a != b, otherwise print "."
-check_ints_equal:  # (a : int, b : int, msg : (address array byte)) -> boolean
+check-ints-equal:  # (a : int, b : int, msg : (address array byte)) -> boolean
   # prolog
   55/push-EBP
   89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
@@ -265,35 +266,35 @@ check_ints_equal:  # (a : int, b : int, msg : (address array byte)) -> boolean
   8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           3/r32/EBX   0xc/disp8       .                 # copy *(EBP+12) to EBX
   # if EAX == b/EBX
   39/compare                      3/mod/direct    0/rm32/EAX    .           .             .           3/r32/EBX   .               .                 # compare EAX and EBX
-  75/jump-if-unequal  $check_ints_equal:else/disp8
+  75/jump-if-unequal  $check-ints-equal:else/disp8
     # print('.')
       # push args
   68/push  "."/imm32
       # call
-  e8/call  write_stderr/disp32
+  e8/call  write-stderr/disp32
       # discard arg
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
     # return
-  eb/jump  $check_ints_equal:end/disp8
+  eb/jump  $check-ints-equal:end/disp8
   # else:
-$check_ints_equal:else:
+$check-ints-equal:else:
   # copy msg into ECX
   8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           1/r32/ECX   0x10/disp8       .                # copy *(EBP+16) to ECX
     # print(ECX)
       # push args
   51/push-ECX
       # call
-  e8/call  write_stderr/disp32
+  e8/call  write-stderr/disp32
       # discard arg
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
     # print newline
       # push args
   68/push  Newline/imm32
       # call
-  e8/call  write_stderr/disp32
+  e8/call  write-stderr/disp32
       # discard arg
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
-$check_ints_equal:end:
+$check-ints-equal:end:
   # restore registers
   5b/pop-to-EBX
   59/pop-to-ECX
@@ -302,7 +303,7 @@ $check_ints_equal:end:
   5d/pop-to-EBP
   c3/return
 
-write_stderr:  # s : (address array byte) -> <void>
+write-stderr:  # s : (address array byte) -> <void>
   # prolog
   55/push-EBP
   89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
@@ -340,10 +341,10 @@ Newline:
   # data
   0a/newline
 
-# for kernel_string_equal tests
-Null_kernel_string:
+# for kernel-string-equal tests
+Null-kernel-string:
   00/null
-Abc_kernel_string:
+Abc-kernel-string:
   41/A 62/b 63/c 00/null
 
 # vim:nowrap:textwidth=0
diff --git a/subx/examples/ex12.subx b/subx/examples/ex12.subx
index d7c2e868..1db660ed 100644
--- a/subx/examples/ex12.subx
+++ b/subx/examples/ex12.subx
@@ -12,7 +12,7 @@
 # 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
 
   # mmap(0x1000)
-  bb/copy                         .               .             .           .             .           .           .               mmap_new_segment/imm32  # copy to EBX
+  bb/copy                         .               .             .           .             .           .           .               mmap-new-segment/imm32  # copy to EBX
   b8/copy                         .               .             .           .             .           .           .               0x5a/imm32/mmap         # copy to EAX
   cd/syscall  0x80/imm8
 
@@ -26,7 +26,7 @@
 
 == data
 # various constants used here were found in the Linux sources (search for file mman-common.h)
-mmap_new_segment:  # type mmap_arg_struct
+mmap-new-segment:  # type mmap_arg_struct
   # addr
   00 00 00 00  # null
   # len
diff --git a/subx/examples/ex8.subx b/subx/examples/ex8.subx
index ccc6dcb9..2726eea9 100644
--- a/subx/examples/ex8.subx
+++ b/subx/examples/ex8.subx
@@ -20,11 +20,11 @@
 # 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
   # prolog
   89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
-  # call ascii_length(argv[1])
+  # call ascii-length(argv[1])
     # push args
   ff          6/subop/push        1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           .           0x8/disp8       .                 # push *(EBP+8)
     # call
-  e8/call  ascii_length/disp32
+  e8/call  ascii-length/disp32
     # discard args
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
 
@@ -33,24 +33,24 @@
   b8/copy                         .               .             .           .             .           .           .               1/imm32/exit      # copy to EAX
   cd/syscall  0x80/imm8
 
-ascii_length:  # (s)
+ascii-length:  # (s)
   # initialize s (EDX)
   8b/copy                         1/mod/*+disp8   4/rm32/sib    4/base/ESP  4/index/none              2/r32/EDX   4/disp8                           # copy *(ESP+4) to EDX
   # var result = 0 (EAX)
   b8/copy                         .               .             .           .             .           .           .               0/imm32           # copy to EAX
-$ascii_length_loop:
+$ascii-length-loop:
   # var c = *s (ECX)
   8a/copy                         0/mod/*         2/rm32/EDX    .           .             .           1/r32/ECX   .               .                 # copy byte at *EDX to lower byte of ECX
   # if c == '\0' break
   81          7/subop/compare     3/mod/direct    1/rm32/ECX    .           .             .           .           .               0/imm32           # compare ECX
-  74/jump-if-equal  $ascii_length_ret/disp8
+  74/jump-if-equal  $ascii-length-ret/disp8
   # ++s
   81          0/subop/add         3/mod/direct    2/rm32/EDX    .           .             .           .           .               1/imm32           # add to EDX
   # ++result
   40/inc-EAX
   # loop
-  eb/jump  $ascii_length_loop/disp8
-$ascii_length_ret:
+  eb/jump  $ascii-length-loop/disp8
+$ascii-length-ret:
   # return (result in EAX)
   c3/return
 
diff --git a/subx/examples/ex9.subx b/subx/examples/ex9.subx
index c5711ef1..7e4132b2 100644
--- a/subx/examples/ex9.subx
+++ b/subx/examples/ex9.subx
@@ -22,13 +22,13 @@
 # 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
   # prolog
   89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
-  # call ascii_difference(argv[1], argv[2])
+  # call ascii-difference(argv[1], argv[2])
     # push argv[2]
   ff          6/subop/push        1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           .           0xc/disp8       .                 # push *(EBP+12)
     # push argv[1]
   ff          6/subop/push        1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none  .           .           0x8/disp8       .                 # push *(EBP+8)
     # call
-  e8/call  ascii_difference/disp32
+  e8/call  ascii-difference/disp32
     # discard args
   81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
   # exit(EAX)
@@ -36,7 +36,7 @@
   b8/copy                         .               .             .           .             .           .           .               1/imm32/exit      # copy to EAX
   cd/syscall  0x80/imm8
 
-ascii_difference:  # (s1, s2) : null-terminated ascii strings
+ascii-difference:  # (s1, s2) : null-terminated ascii strings
   # a = first letter of s1 (ECX)
   8b/copy                         1/mod/*+disp8   4/rm32/sib    4/base/ESP  4/index/none              0/r32/EAX   4/disp8         .                 # copy *(ESP+4) to EAX
   8b/copy                         0/mod/indirect  0/rm32/EAX    .           .             .           0/r32/EAX   .               .                 # copy *EAX to EAX