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<font color="#ffffff" face="helvetica, arial">&nbsp;<br><big><big><strong><a href="ranger.html"><font color="#ffffff">ranger</font></a>.defaults</strong></big></big></font></td
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><font color="#ffffff" face="helvetica, arial"><a href=".">index</a><br><a href="file:/home/hut/work/ranger/ranger/defaults/__init__.py">/home/hut/work/ranger/ranger/defaults/__init__.py</a></font></td></tr></table>
    <p><tt>Default&nbsp;options&nbsp;and&nbsp;configration&nbsp;files</tt></p>
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<font color="#ffffff" face="helvetica, arial"><big><strong>Package Contents</strong></big></font></td></tr>
    
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generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-11-15 08:19:44 +0000
he Linux # kernel in a few places. This layer implements a function for comparing # a null-terminated 'kernel string' with a size-prefixed 'SubX string'. # # To run: # $ ./bootstrap translate init.linux apps/ex11.subx -o apps/ex11 # $ ./bootstrap run apps/ex11 # runs a series of tests # ...... # all tests pass # # (We can't yet run the tests when given a "test" commandline argument, # because checking for it would require the function being tested! Breakage # would cause tests to not run, rather than to fail as we'd like.) == 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 Entry: # run all tests 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 e8/call syscall_exit/disp32 # compare a null-terminated ascii string with a more idiomatic size-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: size-prefixed ascii string -> eax: boolean # pseudocode: # n = benchmark->size # s1 = s # s2 = benchmark->data # i = 0 # while i < n # c1 = *s1 # c2 = *s2 # if (c1 == 0) return false # if (c1 != c2) return false # ++s1, ++s2, ++i # return *s1 == 0 # # registers: # i: ecx # n: edx # s1: edi # s2: esi # c1: eax # c2: ebx # # . prologue 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 # s1/edi = s 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 7/r32/edi 8/disp8 . # copy *(ebp+8) to edi # n/edx = benchmark->size 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 2/r32/edx 0xc/disp8 . # copy *(ebp+12) to edx 8b/copy 0/mod/indirect 2/rm32/edx . . . 2/r32/edx . . # copy *edx to edx # s2/esi = benchmark->data 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 0xc/disp8 . # copy *(ebp+12) to esi 81 0/subop/add 3/mod/direct 6/rm32/esi . . . . . 4/imm32 # add to esi # i/ecx = c1/eax = c2/ebx = 0 b9/copy-to-ecx 0/imm32/exit b8/copy-to-eax 0/imm32 bb/copy-to-ebx 0/imm32 $kernel-string-equal?:loop: # if (i >= n) break 39/compare 3/mod/direct 1/rm32/ecx . . . 2/r32/edx . . # compare ecx with edx 7d/jump-if->= $kernel-string-equal?:break/disp8 # c1 = *s1 8a/copy-byte 0/mod/indirect 7/rm32/edi . . . 0/r32/AL . . # copy byte at *edi to AL # c2 = *s2 8a/copy-byte 0/mod/indirect 6/rm32/esi . . . 3/r32/BL . . # copy byte at *esi to BL # if (c1 == 0) return false 3d/compare-eax-and 0/imm32/null 74/jump-if-= $kernel-string-equal?:false/disp8 # if (c1 != c2) return false 39/compare 3/mod/direct 0/rm32/eax . . . 3/r32/ebx . . # compare eax and ebx 75/jump-if-!= $kernel-string-equal?:false/disp8 # ++i 41/increment-ecx # ++s1 47/increment-edi # ++s2 46/increment-esi eb/jump $kernel-string-equal?:loop/disp8 $kernel-string-equal?:break: # return *s1 == 0 8a/copy-byte 0/mod/indirect 7/rm32/edi . . . 0/r32/AL . . # copy byte at *edi to AL 3d/compare-eax-and 0/imm32/null 75/jump-if-!= $kernel-string-equal?:false/disp8 $kernel-string-equal?:true: b8/copy-to-eax 1/imm32 eb/jump $kernel-string-equal?:end/disp8 $kernel-string-equal?:false: b8/copy-to-eax 0/imm32 $kernel-string-equal?:end: # . restore registers 5f/pop-to-edi 5e/pop-to-esi 5b/pop-to-ebx 5a/pop-to-edx 59/pop-to-ecx # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return # - tests 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 # . . call e8/call kernel-string-equal?/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # check-ints-equal(eax, 1, msg) # . . push args 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 # . . 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") # . . push args 68/push "Abc"/imm32 68/push Null-kernel-string/imm32 # . . call e8/call kernel-string-equal?/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # check-ints-equal(eax, 0, msg) # . . push args 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 # . . 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?(_test-Abc-kernel-string, "Abc") # . . push args 68/push "Abc"/imm32 68/push _test-Abc-kernel-string/imm32 # . . call e8/call kernel-string-equal?/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # check-ints-equal(eax, 1, msg) # . . push args 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 # . . 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?(_test-Abc-kernel-string, "Adc") # . . push args 68/push "Adc"/imm32 68/push _test-Abc-kernel-string/imm32 # . . call e8/call kernel-string-equal?/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # check-ints-equal(eax, 0, msg) # . . push args 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 # . . 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?(_test-Abc-kernel-string, "") # . . push args 68/push ""/imm32 68/push _test-Abc-kernel-string/imm32 # . . call e8/call kernel-string-equal?/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # check-ints-equal(eax, 0, msg) # . . push args 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 # . . 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?(_test-Abc-kernel-string, "Ab") # . . push args 68/push "Ab"/imm32 68/push _test-Abc-kernel-string/imm32 # . . call e8/call kernel-string-equal?/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # check-ints-equal(eax, 0, msg) # . . push args 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 # . . 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?(_test-Abc-kernel-string, "Abcd") # . . push args 68/push "Abcd"/imm32 68/push _test-Abc-kernel-string/imm32 # . . call e8/call kernel-string-equal?/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # check-ints-equal(eax, 0, msg) # . . push args 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 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp c3/return # - helpers # print msg to stderr if a != b, otherwise print "." check-ints-equal: # (a: int, b: int, msg: (addr array byte)) -> boolean # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # . save registers 51/push-ecx 53/push-ebx # load args into eax, ebx and ecx 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 8/disp8 . # copy *(ebp+8) to eax 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 3/r32/ebx 0xc/disp8 . # copy *(ebp+12) to ebx # if (eax == b/ebx) print('.') and return 39/compare 3/mod/direct 0/rm32/eax . . . 3/r32/ebx . . # compare eax and ebx 75/jump-if-unequal $check-ints-equal:else/disp8 # . write-stderr('.') # . . push args 68/push "."/imm32 # . . call e8/call write-stderr/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # . return eb/jump $check-ints-equal:end/disp8 # otherwise print(msg) $check-ints-equal:else: # copy msg into ecx 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0x10/disp8 . # copy *(ebp+16) to ecx # print(ecx) # . . push args 51/push-ecx # . . call e8/call write-stderr/disp32 # . . discard args 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 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp $check-ints-equal:end: # . restore registers 5b/pop-to-ebx 59/pop-to-ecx # end 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return write-stderr: # s: (addr array byte) -> <void> # . 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 52/push-edx 53/push-ebx # syscall(write, 2/stderr, (data) s+4, (size) *s) # . . fd = 2 (stderr) bb/copy-to-ebx 2/imm32 # . . x = s+4 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 8/disp8 . # copy *(ebp+8) to ecx 81 0/subop/add 3/mod/direct 1/rm32/ecx . . . . . 4/imm32 # add to ecx # . . size = *s 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 2/r32/edx 8/disp8 . # copy *(ebp+8) to edx 8b/copy 0/mod/indirect 2/rm32/edx . . . 2/r32/edx . . # copy *edx to edx # . . syscall e8/call syscall_write/disp32 # . restore registers 5b/pop-to-ebx 5a/pop-to-edx 59/pop-to-ecx 58/pop-to-eax # . end 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return == data Newline: # size 1/imm32 # data 0a/newline # for kernel-string-equal tests Null-kernel-string: 00/null _test-Abc-kernel-string: 41/A 62/b 63/c 00/null # . . vim:nowrap:textwidth=0
generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-11-15 08:19:39 +0000