912 lines
42 KiB
Plaintext
912 lines
42 KiB
Plaintext
# Read a series of segments from stdin and concatenate segments with the same
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# name on stdout.
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#
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# Segments are emitted in order of first encounter.
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#
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# Drop lines that are all comments. They could get misleading after assortment
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# because we don't know if they refer to the line above or the line below.
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#
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# To run (from the subx/ directory):
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# $ ./subx translate *.subx apps/assort.subx -o apps/assort
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# $ cat x
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# == code
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# abc
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# == code
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# def
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# $ cat x |./subx run apps/assort
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# == code
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# abc
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# def
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== code
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# instruction effective address register displacement immediate
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# . op subop mod rm32 base index scale r32
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# . 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
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Entry:
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# initialize heap
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# . Heap = new-segment(Heap-size)
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# . . push args
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68/push Heap/imm32
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ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Heap-size/disp32 # push *Heap-size
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# . . call
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e8/call new-segment/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# run tests if necessary, convert stdin if not
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# . prolog
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# - if argc > 1 and argv[1] == "test", then return run_tests()
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# . argc > 1
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81 7/subop/compare 1/mod/*+disp8 5/rm32/EBP . . . . 0/disp8 1/imm32 # compare *EBP
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7e/jump-if-lesser-or-equal $run-main/disp8
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# . argv[1] == "test"
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# . . push args
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68/push "test"/imm32
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ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8)
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# . . call
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e8/call kernel-string-equal?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# . check result
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3d/compare-EAX-and 1/imm32
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75/jump-if-not-equal $run-main/disp8
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# . run-tests()
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e8/call run-tests/disp32
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8b/copy 0/mod/indirect 5/rm32/.disp32 . . 3/r32/EBX Num-test-failures/disp32 # copy *Num-test-failures to EBX
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eb/jump $main:end/disp8
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$run-main:
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# - otherwise convert stdin
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# var ed/EAX : exit-descriptor
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81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # subtract from ESP
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89/copy 3/mod/direct 0/rm32/EAX . . . 4/r32/ESP . . # copy ESP to EAX
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# configure ed to really exit()
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# . ed->target = 0
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c7 0/subop/copy 0/mod/direct 0/rm32/EAX . . . . . 0/imm32 # copy to *EAX
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# return convert(Stdin, 1/stdout, 2/stderr, ed)
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# . . push args
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50/push-EAX/ed
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68/push Stderr/imm32
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68/push Stdout/imm32
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68/push Stdin/imm32
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# . . call
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e8/call convert/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x10/imm32 # add to ESP
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# . syscall(exit, 0)
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bb/copy-to-EBX 0/imm32
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$main:end:
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b8/copy-to-EAX 1/imm32/exit
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cd/syscall 0x80/imm8
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# data structure:
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# table: (address stream {string, (address stream byte)}) (8 bytes per row)
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# inefficient; uses sequential search for looking up segments by name
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convert: # in : (address buffered-file), out : (address buffered-file) -> <void>
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# pseudocode:
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# var table : (address stream) = new-stream(10 rows, 8 bytes each)
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# read-segments(in, table)
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# write-segments(out, table)
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#
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# . save registers
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51/push-ECX
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# var table/ECX : (address stream byte) = stream(10 * 8)
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81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 0x50/imm32 # subtract from ESP
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68/push 0x50/imm32/length
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68/push 0/imm32/read
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68/push 0/imm32/write
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89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
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# clear-stream(table)
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# . . push args
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51/push-ECX
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# . . call
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e8/call clear-stream/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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$convert:read:
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#? # print("read\n") {{{
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#? # . . push args
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#? 68/push "read\n"/imm32
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#? 68/push 2/imm32/stderr
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#? # . . call
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#? e8/call write/disp32
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#? # . . discard args
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#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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#? # }}}
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# read-segments(in, table)
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# . . push args
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51/push-ECX
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ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8)
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# . . call
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e8/call read-segments/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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$convert:write:
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#? # print("write\n") {{{
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#? # . . push args
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#? 68/push "write\n"/imm32
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#? 68/push 2/imm32/stderr
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#? # . . call
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#? e8/call write/disp32
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#? # . . discard args
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#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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#? # }}}
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# write-segments(out, table)
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# . . push args
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51/push-ECX
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ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0xc/disp8 . # push *(EBP+12)
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# . . call
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e8/call write-segments/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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$convert:end:
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# . reclaim locals
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x5c/imm32 # add to ESP
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# . restore registers
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59/pop-to-ECX
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# . epilog
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89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
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5d/pop-to-EBP
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c3/return
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test-convert:
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# . prolog
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55/push-EBP
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89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
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# setup
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# . clear-stream(_test-input-stream)
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# . . push args
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68/push _test-input-stream/imm32
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# . . call
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e8/call clear-stream/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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# . clear-stream(_test-input-buffered-file+4)
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# . . push args
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b8/copy-to-EAX _test-input-buffered-file/imm32
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05/add-to-EAX 4/imm32
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50/push-EAX
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# . . call
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e8/call clear-stream/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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# . clear-stream(_test-output-stream)
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# . . push args
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68/push _test-output-stream/imm32
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# . . call
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e8/call clear-stream/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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# . clear-stream(_test-output-buffered-file+4)
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# . . push args
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b8/copy-to-EAX _test-output-buffered-file/imm32
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05/add-to-EAX 4/imm32
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50/push-EAX
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# . . call
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e8/call clear-stream/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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# initialize input (meta comments in parens)
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# # comment 1
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# # comment 2 indented
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# == code 0x09000000 (new segment)
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# # comment 3 inside a segment
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# 1
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# (empty line)
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# 2 3 # comment 4 inline with other contents
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# == data 0x0a000000 (new segment)
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# 4 5/imm32
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# == code (existing segment but non-contiguous with previous iteration)
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# 6 7
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# 8 9 (multiple lines)
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# == code (existing segment contiguous with previous iteration)
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# 10 11
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# . write(_test-input-stream, "# comment 1\n")
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# . . push args
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68/push "# comment 1\n"/imm32
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68/push _test-input-stream/imm32
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# . write(_test-input-stream, " # comment 2 indented\n")
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# . . push args
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68/push " # comment 2 indented\n"/imm32
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68/push _test-input-stream/imm32
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# . write(_test-input-stream, "== code 0x09000000\n")
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# . . push args
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68/push "== code 0x09000000\n"/imm32
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68/push _test-input-stream/imm32
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# . write(_test-input-stream, "# comment 3 inside a segment\n")
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# . . push args
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68/push "# comment 3 inside a segment\n"/imm32
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68/push _test-input-stream/imm32
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# . write(_test-input-stream, "1\n")
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# . . push args
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68/push "1\n"/imm32
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68/push _test-input-stream/imm32
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# . write(_test-input-stream, "\n") # empty line
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# . . push args
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68/push "\n"/imm32
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68/push _test-input-stream/imm32
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# . write(_test-input-stream, "2 3 # comment 4 inline with other contents\n")
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# . . push args
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68/push "2 3 # comment 4 inline with other contents\n"/imm32
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68/push _test-input-stream/imm32
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# . write(_test-input-stream, "== data 0x0a000000\n")
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# . . push args
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68/push "== data 0x0a000000\n"/imm32
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68/push _test-input-stream/imm32
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# . write(_test-input-stream, "4 5/imm32\n")
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# . . push args
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68/push "4 5/imm32\n"/imm32
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68/push _test-input-stream/imm32
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# . write(_test-input-stream, "== code\n")
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# . . push args
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68/push "== code\n"/imm32
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68/push _test-input-stream/imm32
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# . write(_test-input-stream, "6 7\n")
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# . . push args
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68/push "6 7\n"/imm32
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68/push _test-input-stream/imm32
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# . write(_test-input-stream, "8 9\n")
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# . . push args
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68/push "8 9\n"/imm32
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68/push _test-input-stream/imm32
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# . write(_test-input-stream, "== code\n")
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# . . push args
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68/push "== code\n"/imm32
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68/push _test-input-stream/imm32
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# . write(_test-input-stream, "10 11\n")
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# . . push args
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68/push "10 11\n"/imm32
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68/push _test-input-stream/imm32
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# convert(_test-input-buffered-file, _test-output-buffered-file)
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# . . push args
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68/push _test-output-buffered-file/imm32
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68/push _test-input-buffered-file/imm32
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# . . call
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e8/call convert/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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# . flush(_test-output-buffered-file)
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# . . push args
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68/push _test-output-buffered-file/imm32
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# . . call
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e8/call flush/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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# check output
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# == code 0x09000000
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# 1
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# 2 3 # comment 4 inline with other contents
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# 6 7
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# 8 9
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# 10 11
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# == data 0x0a000000
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# 4 5/imm32
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#? # dump output {{{
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#? # . write(2/stderr, "result: ^")
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#? # . . push args
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#? 68/push "result: ^"/imm32
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#? 68/push 2/imm32/stderr
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#? # . . call
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#? e8/call write/disp32
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#? # . . discard args
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#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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#? # . write-stream(2/stderr, _test-output-stream)
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#? # . . push args
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#? 68/push _test-output-stream/imm32
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#? 68/push 2/imm32/stderr
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#? # . . call
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#? e8/call write-stream/disp32
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#? # . . discard args
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#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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#? # . write(2/stderr, "$\n")
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#? # . . push args
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#? 68/push "$\n"/imm32
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#? 68/push 2/imm32/stderr
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#? # . . call
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#? e8/call write/disp32
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#? # . . discard args
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#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
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#? # . rewind-stream(_test-output-stream)
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#? # . . push args
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#? 68/push _test-output-stream/imm32
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#? # . . call
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#? e8/call rewind-stream/disp32
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#? # . . discard args
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#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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#? # }}}
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# . check-next-stream-line-equal(_test-output-stream, "== code 0x09000000", msg)
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# . . push args
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68/push "F - test-convert/0"/imm32
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68/push "== code 0x09000000"/imm32
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68/push _test-output-stream/imm32
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# . . call
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e8/call check-next-stream-line-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . check-next-stream-line-equal(_test-output-stream, "1", msg)
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# . . push args
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68/push "F - test-convert/1"/imm32
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68/push "1"/imm32
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68/push _test-output-stream/imm32
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# . . call
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e8/call check-next-stream-line-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . check-next-stream-line-equal(_test-output-stream, "2 3 # comment 4 inline with other contents", msg)
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# . . push args
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68/push "F - test-convert/2"/imm32
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68/push "2 3 # comment 4 inline with other contents"/imm32
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68/push _test-output-stream/imm32
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# . . call
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e8/call check-next-stream-line-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . check-next-stream-line-equal(_test-output-stream, "6 7", msg)
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# . . push args
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68/push "F - test-convert/3"/imm32
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68/push "6 7"/imm32
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68/push _test-output-stream/imm32
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# . . call
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e8/call check-next-stream-line-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
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# . check-next-stream-line-equal(_test-output-stream, "8 9", msg)
|
|
# . . push args
|
|
68/push "F - test-convert/4"/imm32
|
|
68/push "8 9"/imm32
|
|
68/push _test-output-stream/imm32
|
|
# . . call
|
|
e8/call check-next-stream-line-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
# . check-next-stream-line-equal(_test-output-stream, "10 11", msg)
|
|
# . . push args
|
|
68/push "F - test-convert/5"/imm32
|
|
68/push "10 11"/imm32
|
|
68/push _test-output-stream/imm32
|
|
# . . call
|
|
e8/call check-next-stream-line-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
# . check-next-stream-line-equal(_test-output-stream, "== data 0x0a000000", msg)
|
|
# . . push args
|
|
68/push "F - test-convert/6"/imm32
|
|
68/push "== data 0x0a000000"/imm32
|
|
68/push _test-output-stream/imm32
|
|
# . . call
|
|
e8/call check-next-stream-line-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
# . check-next-stream-line-equal(_test-output-stream, "4 5/imm32", msg)
|
|
# . . push args
|
|
68/push "F - test-convert/7"/imm32
|
|
68/push "4 5/imm32"/imm32
|
|
68/push _test-output-stream/imm32
|
|
# . . call
|
|
e8/call check-next-stream-line-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
|
|
|
|
# beware: leaks memory (one name per segment read)
|
|
read-segments: # in : (address buffered-file), table : (address stream {string, (address stream byte)})
|
|
# pseudocode:
|
|
# var curr-segment = null
|
|
# var line = new-stream(512, 1)
|
|
# while true
|
|
# clear-stream(line)
|
|
# read-line-buffered(in, line)
|
|
# if (line->write == 0) break # end of file
|
|
# var word-slice = next-word(line)
|
|
# if slice-empty?(word-slice) # whitespace
|
|
# continue
|
|
# if slice-starts-with?(word-slice, "#") # comment
|
|
# continue
|
|
# if slice-equal?(word-slice, "==")
|
|
# var segment-name = next-word(line)
|
|
# segment-slot = leaky-get-or-insert-slice(table, segment-name, row-size=8)
|
|
# curr-segment = *segment-slot
|
|
# if curr-segment != 0
|
|
# continue
|
|
# curr-segment = new-stream(Segment-size)
|
|
# *segment-slot = curr-segment
|
|
# rewind-stream(line)
|
|
# write-stream(curr-segment, line) # abort if curr-segment overflows
|
|
#
|
|
# word-slice and segment-name are both slices with disjoint lifetimes, so
|
|
# we'll use the same address for them.
|
|
#
|
|
# registers:
|
|
# line: ECX
|
|
# word-slice and segment-name: EDX
|
|
# segment-name and curr-segment: EBX
|
|
# word-slice->start: ESI
|
|
# temporary: EAX
|
|
#
|
|
# . prolog
|
|
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
|
|
56/push-ESI
|
|
# var line/ECX : (address stream byte) = stream(512)
|
|
81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 0x200/imm32 # subtract from ESP
|
|
68/push 0x200/imm32/length
|
|
68/push 0/imm32/read
|
|
68/push 0/imm32/write
|
|
89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX
|
|
# var word-slice/EDX = {0, 0}
|
|
68/push 0/imm32/end
|
|
68/push 0/imm32/start
|
|
89/copy 3/mod/direct 2/rm32/EDX . . . 4/r32/ESP . . # copy ESP to EDX
|
|
$read-segments:loop:
|
|
# clear-stream(line)
|
|
# . . push args
|
|
51/push-ECX
|
|
# . . call
|
|
e8/call clear-stream/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
# read-line-buffered(in, line)
|
|
# . . push args
|
|
51/push-ECX
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8)
|
|
# . . call
|
|
e8/call read-line-buffered/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
$read-segments:check0:
|
|
# if (line->write == 0) break
|
|
81 7/subop/compare 0/mod/indirect 1/rm32/ECX . . . . . 0/imm32 # compare *ECX
|
|
0f 84/jump-if-equal $read-segments:break/disp32
|
|
#? # dump line {{{
|
|
#? # . write(2/stderr, "LL: ")
|
|
#? # . . push args
|
|
#? 68/push "LL: "/imm32
|
|
#? 68/push 2/imm32/stderr
|
|
#? # . . call
|
|
#? e8/call write/disp32
|
|
#? # . . discard args
|
|
#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
#? # . write-stream(2/stderr, line)
|
|
#? # . . push args
|
|
#? 51/push-ECX
|
|
#? 68/push 2/imm32/stderr
|
|
#? # . . call
|
|
#? e8/call write-stream/disp32
|
|
#? # . . discard args
|
|
#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
#? # . rewind-stream(line)
|
|
#? # . . push args
|
|
#? 51/push-ECX
|
|
#? # . . call
|
|
#? e8/call rewind-stream/disp32
|
|
#? # . . discard args
|
|
#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
#? # . write(2/stderr, "$\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
|
|
#? # }}}
|
|
# next-word(line, word-slice)
|
|
# . . push args
|
|
52/push-EDX
|
|
51/push-ECX
|
|
# . . call
|
|
e8/call next-word/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
$read-segments:check1:
|
|
#? # print("check1\n") {{{
|
|
#? # . . push args
|
|
#? 68/push "check1\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
|
|
#? # }}}
|
|
# if (slice-empty?(word-slice)) continue
|
|
# . EAX = slice-empty?(word-slice)
|
|
# . . push args
|
|
52/push-EDX
|
|
# . . call
|
|
e8/call slice-empty?/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
# . if (EAX != 0) continue
|
|
3d/compare-EAX-and 0/imm32
|
|
0f 85/jump-if-not-equal $read-segments:loop/disp32
|
|
$read-segments:check-for-comment:
|
|
#? # print("check for comment\n") {{{
|
|
#? # . . push args
|
|
#? 68/push "check for comment\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
|
|
#? # }}}
|
|
# if (slice-starts-with?(word-slice, "#")) continue
|
|
# . start/ESI = word-slice->start
|
|
8b/copy 0/mod/indirect 2/rm32/EDX . . . 6/r32/ESI . . # copy *ECX to ESI
|
|
# . c/EAX = *start
|
|
31/xor 3/mod/direct 0/rm32/EAX . . . 0/r32/EAX . . # clear EAX
|
|
8a/copy-byte 0/mod/indirect 6/rm32/ESI . . . 0/r32/AL . . # copy byte at *ESI to AL
|
|
# . if (EAX == '#') continue
|
|
3d/compare-EAX-and 0x23/imm32/hash
|
|
0f 84/jump-if-equal $read-segments:loop/disp32
|
|
$read-segments:check-for-segment-header:
|
|
#? # print("check for segment header\n") {{{
|
|
#? # . . push args
|
|
#? 68/push "check for segment header\n"/imm32
|
|
#? 68/push 2/imm32/stderr
|
|
#? # . . call
|
|
#? e8/call write/disp32
|
|
#? # . . discard args
|
|
#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
#? # }}}
|
|
#? # dump word-slice {{{
|
|
#? # . write(2/stderr, "AA: ")
|
|
#? # . . push args
|
|
#? 68/push "AA: "/imm32
|
|
#? 68/push 2/imm32/stderr
|
|
#? # . . call
|
|
#? e8/call write/disp32
|
|
#? # . . discard args
|
|
#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
#? # . clear-stream(Stderr+4)
|
|
#? # . . push args
|
|
#? b8/copy-to-EAX Stderr/imm32
|
|
#? 05/add-to-EAX 4/imm32
|
|
#? 50/push-EAX
|
|
#? # . . call
|
|
#? e8/call clear-stream/disp32
|
|
#? # . . discard args
|
|
#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
#? # . write-slice-buffered(Stderr, word-slice)
|
|
#? # . . push args
|
|
#? 52/push-EDX
|
|
#? 68/push Stderr/imm32
|
|
#? # . . call
|
|
#? e8/call write-slice-buffered/disp32
|
|
#? # . . discard args
|
|
#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
#? # . flush(Stderr)
|
|
#? # . . push args
|
|
#? 68/push Stderr/imm32
|
|
#? # . . call
|
|
#? e8/call flush/disp32
|
|
#? # . . discard args
|
|
#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
#? # . write(2/stderr, "$\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
|
|
#? # }}}
|
|
# if !slice-equal?(word-slice, "==") goto next check
|
|
# . EAX = slice-equal?(word-slice, "==")
|
|
# . . push args
|
|
68/push "=="/imm32
|
|
52/push-EDX
|
|
# . . call
|
|
e8/call slice-equal?/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# . if (EAX == 0) goto check3
|
|
3d/compare-EAX-and 0/imm32
|
|
0f 84/jump-if-equal $read-segments:regular-line/disp32
|
|
# segment-name = next-word(line)
|
|
# . . push args
|
|
52/push-EDX
|
|
51/push-ECX
|
|
# . . call
|
|
e8/call next-word/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
#? # dump segment name {{{
|
|
#? # . write(2/stderr, "AA: ")
|
|
#? # . . push args
|
|
#? 68/push "AA: "/imm32
|
|
#? 68/push 2/imm32/stderr
|
|
#? # . . call
|
|
#? e8/call write/disp32
|
|
#? # . . discard args
|
|
#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
#? # . clear-stream(Stderr+4)
|
|
#? # . . push args
|
|
#? b8/copy-to-EAX Stderr/imm32
|
|
#? 05/add-to-EAX 4/imm32
|
|
#? 50/push-EAX
|
|
#? # . . call
|
|
#? e8/call clear-stream/disp32
|
|
#? # . . discard args
|
|
#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
#? # . write-slice-buffered(Stderr, word-slice)
|
|
#? # . . push args
|
|
#? 52/push-EDX
|
|
#? 68/push Stderr/imm32
|
|
#? # . . call
|
|
#? e8/call write-slice-buffered/disp32
|
|
#? # . . discard args
|
|
#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
#? # . flush(Stderr)
|
|
#? # . . push args
|
|
#? 68/push Stderr/imm32
|
|
#? # . . call
|
|
#? e8/call flush/disp32
|
|
#? # . . discard args
|
|
#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
#? # . write(2/stderr, "$\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
|
|
#? # }}}
|
|
# segment-slot/EAX = leaky-get-or-insert-slice(table, segment-name, row-size=8)
|
|
# . . push args
|
|
68/push 8/imm32/row-size
|
|
52/push-EDX
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0xc/disp8 . # push *(EBP+12)
|
|
# . . call
|
|
e8/call leaky-get-or-insert-slice/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
# curr-segment = *segment-slot
|
|
8b/copy 0/mod/indirect 0/rm32/EAX . . . 3/r32/EBX . . # copy *EAX to EBX
|
|
# if (curr-segment != 0) continue
|
|
81 7/subop/compare 3/mod/direct 3/rm32/EBX . . . . . 0/imm32 # compare EBX
|
|
0f 85/jump-if-not-equal $read-segments:loop/disp32
|
|
# curr-segment = new-stream(Heap, Segment-size, 1)
|
|
# . save segment-slot
|
|
50/push-EAX
|
|
# . EAX = new-stream(Heap, Segment-size, 1)
|
|
# . . push args
|
|
68/push 1/imm32
|
|
ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Segment-size/disp32 # push *Segment-size
|
|
68/push Heap/imm32
|
|
# . . call
|
|
e8/call new-stream/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
|
# . curr-segment = EAX
|
|
89/copy 3/mod/direct 3/rm32/EBX . . . 0/r32/EAX . . # copy EAX to EBX
|
|
# . restore segment-slot
|
|
58/pop-to-EAX
|
|
# *segment-slot = curr-segment
|
|
89/copy 0/mod/indirect 0/rm32/EAX . . . 3/r32/EBX . . # copy EBX to *EAX
|
|
# fall through
|
|
$read-segments:regular-line:
|
|
#? # print("regular line\n") {{{
|
|
#? # . . push args
|
|
#? 68/push "regular line\n"/imm32
|
|
#? 68/push 2/imm32/stderr
|
|
#? # . . call
|
|
#? e8/call write/disp32
|
|
#? # . . discard args
|
|
#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
#? # }}}
|
|
#? # dump line {{{
|
|
#? # . write(2/stderr, "regular line: ")
|
|
#? # . . push args
|
|
#? 68/push "regular line: "/imm32
|
|
#? 68/push 2/imm32/stderr
|
|
#? # . . call
|
|
#? e8/call write/disp32
|
|
#? # . . discard args
|
|
#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
#? # . rewind-stream(line)
|
|
#? # . . push args
|
|
#? 51/push-ECX
|
|
#? # . . call
|
|
#? e8/call rewind-stream/disp32
|
|
#? # . . discard args
|
|
#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
#? # . write-stream(2/stderr, line)
|
|
#? # . . push args
|
|
#? 51/push-ECX
|
|
#? 68/push 2/imm32/stderr
|
|
#? # . . call
|
|
#? e8/call write-stream/disp32
|
|
#? # . . discard args
|
|
#? 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
#? # . write(2/stderr, "$\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
|
|
#? # }}}
|
|
# rewind-stream(line)
|
|
# . . push args
|
|
51/push-ECX
|
|
# . . call
|
|
e8/call rewind-stream/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
#? # print("write stream\n") {{{
|
|
#? # . . push args
|
|
#? 68/push "write stream\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
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#? # }}}
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# write-stream(curr-segment, line)
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|
# . . push args
|
|
51/push-ECX
|
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53/push-EBX
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|
# . . call
|
|
e8/call write-stream/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
# loop
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|
#? # print("loop\n") {{{
|
|
#? # . . push args
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|
#? 68/push "loop\n"/imm32
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|
#? 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
|
|
#? # }}}
|
|
e9/jump $read-segments:loop/disp32
|
|
$read-segments:break:
|
|
$read-segments:end:
|
|
# . reclaim locals
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x214/imm32 # add to ESP
|
|
# . restore registers
|
|
5e/pop-to-ESI
|
|
5b/pop-to-EBX
|
|
5a/pop-to-EDX
|
|
59/pop-to-ECX
|
|
58/pop-to-EAX
|
|
# . epilog
|
|
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
|
|
5d/pop-to-EBP
|
|
c3/return
|
|
|
|
write-segments: # out : (address buffered-file), table : (address stream {string, (address stream byte)})
|
|
# pseudocode:
|
|
# var curr = table->data
|
|
# var max = table->data + table->write
|
|
# while curr < max
|
|
# stream = table[i].stream
|
|
# write-stream-data(out, stream)
|
|
# curr += 8
|
|
# flush(out)
|
|
#
|
|
# . prolog
|
|
55/push-EBP
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
|
# . save registers
|
|
50/push-EAX
|
|
52/push-EDX
|
|
56/push-ESI
|
|
# ESI = table
|
|
8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 0xc/disp8 . # copy *(EBP+12) to ESI
|
|
# write/EDX = table->write
|
|
8b/copy 0/mod/indirect 6/rm32/ESI . . . 2/r32/EDX . . # copy *ESI to EDX
|
|
# curr/ESI = table->data
|
|
81 0/subop/add 3/mod/direct 6/rm32/ESI . . . . . 0xc/imm32 # add to EAX
|
|
# max/EDX = curr + write
|
|
01/add 3/mod/direct 2/rm32/EDX . . . 6/r32/ESI . . # add ESI to EDX
|
|
$write-segments:loop:
|
|
# if (curr >= max) break
|
|
39/compare 3/mod/direct 6/rm32/ESI . . . 2/r32/EDX . . # compare ESI with EDX
|
|
73/jump-if-greater-or-equal-unsigned $write-segments:break/disp8
|
|
# stream/EAX = table[i].stream
|
|
8b/copy 1/mod/*+disp8 6/rm32/ESI . . . 0/r32/EAX 4/disp8 . # copy *(ESI+4) to EAX
|
|
# write-stream-data(out, stream)
|
|
# . . push args
|
|
50/push-EAX
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8)
|
|
# . . call
|
|
e8/call write-stream-data/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
|
$write-segments:continue:
|
|
# curr += 8
|
|
81 0/subop/add 3/mod/direct 6/rm32/ESI . . . . . 8/imm32 # add to ESI
|
|
eb/jump $write-segments:loop/disp8
|
|
$write-segments:break:
|
|
# flush(out)
|
|
# . . push args
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8)
|
|
# . . call
|
|
e8/call flush/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
|
$write-segments:end:
|
|
# . restore registers
|
|
5e/pop-to-ESI
|
|
5a/pop-to-EDX
|
|
58/pop-to-EAX
|
|
# . epilog
|
|
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
|
|
5d/pop-to-EBP
|
|
c3/return
|
|
|
|
# . . vim:nowrap:textwidth=0
|