diff options
Diffstat (limited to 'subx/052kernel_string_equal.subx')
| -rw-r--r-- | subx/052kernel_string_equal.subx | 131 |
1 files changed, 66 insertions, 65 deletions
diff --git a/subx/052kernel_string_equal.subx b/subx/052kernel_string_equal.subx index 21bd9a09..b0b646c5 100644 --- a/subx/052kernel_string_equal.subx +++ b/subx/052kernel_string_equal.subx @@ -21,15 +21,15 @@ # 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: (manual test if this is the last file loaded) - e8/call run_tests/disp32 # 'run_tests' is a function created automatically by SubX. It calls all functions that start with 'test_'. - # exit(Num_test_failures) - 8b/copy 0/mod/indirect 5/rm32/.disp32 . . 3/r32/EBX Num_test_failures/disp32 # copy *Num_test_failures to EBX + e8/call run-tests/disp32 # 'run-tests' is a function created automatically by SubX. It calls all functions that start with 'test-'. + # exit(Num-test-failures) + 8b/copy 0/mod/indirect 5/rm32/.disp32 . . 3/r32/EBX Num-test-failures/disp32 # copy *Num-test-failures to EBX b8/copy . . . . . . . 1/imm32 # copy to EAX cd/syscall 0x80/imm8 # 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 @@ -65,9 +65,9 @@ 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 @@ -75,29 +75,30 @@ $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 3d/compare-EAX 0/imm32 - 75/jump-if-not-equal $kernel_string_fail/disp8 + 75/jump-if-not-equal $kernel-string-equal:false/disp8 +$kernel-string-equal:true: b8/copy . . . . . . . 1/imm32 # copy to EAX - eb/jump $kernel_string_end/disp8 + 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 @@ -111,151 +112,151 @@ $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 == data -Null_kernel_string: +Null-kernel-string: 00/null -Abc_kernel_string: +Abc-kernel-string: 41/A 62/b 63/c 00/null # vim:nowrap:textwidth=0 |