313 lines
15 KiB
Plaintext
313 lines
15 KiB
Plaintext
# Generate code for a new function called 'run-tests' which calls in sequence
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# all functions starting with 'test-'.
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#
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# To build:
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# $ bootstrap/bootstrap translate [01]*.subx subx-params.subx tests.subx -o tests
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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: # run tests if necessary, convert stdin if not
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# . prologue
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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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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# initialize-trace-stream(256KB)
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# . . push args
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68/push 0x40000/imm32/256KB
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# . . call
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e8/call initialize-trace-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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# - if argc > 1 and argv[1] == "test", then return run_tests()
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# if (argc <= 1) goto run-main
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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-<= $subx-tests-main:interactive/disp8
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# if (!kernel-string-equal?(argv[1], "test")) goto run-main
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# . eax = kernel-string-equal?(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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# . if (eax == false) goto run-main
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3d/compare-eax-and 0/imm32/false
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74/jump-if-= $subx-tests-main:interactive/disp8
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# run-tests()
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e8/call run-tests/disp32
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# syscall(exit, *Num-test-failures)
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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 $subx-tests-main:end/disp8
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$subx-tests-main:interactive:
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# - otherwise convert stdin
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# subx-gen-run-tests(Stdin, Stdout)
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# . . push args
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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 subx-gen-run-tests/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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# syscall(exit, 0)
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bb/copy-to-ebx 0/imm32
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$subx-tests-main:end:
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e8/call syscall_exit/disp32
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subx-gen-run-tests: # in: (addr buffered-file), out: (addr buffered-file)
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# pseudocode
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# boolean tests-found = false
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# var line: (stream byte 512)
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# var new-code-segment-handle: (handle stream byte)
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# new-stream(Segment-size, 1, new-code-stream-handle)
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# var new-code-segment: (addr stream byte) = lookup(new-code-stream-handle)
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# write(new-code-segment, "\n== code\n")
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# write(new-code-segment, "run-tests:\n")
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# while true
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# clear-stream(line)
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# read-line-buffered(in, line)
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# if (line->write == 0) break # end of file
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# var word-slice = next-word(line)
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# if slice-empty?(word-slice) # empty line
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# continue
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# if label?(word-slice)
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# if slice-starts-with?(word-slice, "test-")
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# tests-found = true
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# write(new-code-segment, " e8/call ")
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# write-slice(new-code-segment, word-slice)
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# write(new-code-segment, "/disp32\n")
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# rewind-stream(line)
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# write-stream-data(out, line)
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# if tests-found
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# write(new-code-segment, " c3/return\n")
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# write-stream-data(out, new-code-segment)
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# flush(out)
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#
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# . prologue
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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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50/push-eax
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51/push-ecx
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52/push-edx
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53/push-ebx
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56/push-esi
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57/push-edi
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# var line/ecx: (stream byte 512)
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81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0x200/imm32 # subtract from esp
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68/push 0x200/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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# var word-slice/edx: slice
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68/push 0/imm32/end
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68/push 0/imm32/start
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89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx
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# tests-found?/ebx = false
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31/xor 3/mod/direct 3/rm32/ebx . . . 3/r32/ebx . . # clear ebx
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# var new-code-stream-handle/esi: (handle stream byte)
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68/push 0/imm32
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68/push 0/imm32
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89/copy 3/mod/direct 6/rm32/esi . . . 4/r32/esp . . # copy esp to esi
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# new-stream(Heap, Segment-size, 1, new-code-stream-handle)
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# . . push args
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56/push-esi
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68/push 1/imm32
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ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Segment-size/disp32 # push *Segment-size
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68/push Heap/imm32
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# . . call
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e8/call new-stream/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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# var new-code-stream/edi: (addr stream byte) = lookup(*new-code-stream-handle)
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# . eax = lookup(*new-code-stream-handle)
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# . . push args
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ff 6/subop/push 1/mod/*+disp8 6/rm32/esi . . . . 4/disp8 . # push *(esi+4)
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ff 6/subop/push 0/mod/indirect 6/rm32/esi . . . . . . # push *esi
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# . . call
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e8/call lookup/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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# . new-code-stream = eax
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89/copy 3/mod/direct 7/rm32/edi . . . 0/r32/eax . . # copy eax to edi
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# write(new-code-segment, "\n== code\n")
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# . . push args
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68/push "\n== code\n"/imm32
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57/push-edi
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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(new-code-segment, "run-tests:\n")
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# . . push args
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68/push "run-tests:\n"/imm32
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57/push-edi
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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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$subx-gen-run-tests:loop:
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# clear-stream(line)
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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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# read-line-buffered(in, line)
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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-line-buffered/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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$subx-gen-run-tests:check0:
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# if (line->write == 0) break
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81 7/subop/compare 0/mod/indirect 1/rm32/ecx . . . . . 0/imm32 # compare *ecx
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0f 84/jump-if-= $subx-gen-run-tests:break/disp32
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# next-word(line, word-slice)
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# . . push args
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52/push-edx
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51/push-ecx
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# . . call
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e8/call next-word/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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$subx-gen-run-tests:check-empty:
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# if slice-empty?(word-slice) break
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# . eax = slice-empty?(word-slice)
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52/push-edx
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e8/call slice-empty?/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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# . if (eax != false) break
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3d/compare-eax-and 0/imm32/false
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75/jump-if-!= $subx-gen-run-tests:loop/disp8
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$subx-gen-run-tests:check-for-label:
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# if (!label?(word-slice)) continue
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# . eax = label?(word-slice)
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# . . push args
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52/push-edx
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# . . call
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e8/call label?/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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# . if (eax == false) continue
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3d/compare-eax-and 0/imm32/false
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74/jump-if-= $subx-gen-run-tests:continue/disp8
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$subx-gen-run-tests:check-label-prefix:
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# strip trailing ':' from word-slice
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ff 1/subop/decrement 1/mod/*+disp8 2/rm32/edx . . . . 4/disp8 . # decrement *(edx+4)
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# if !slice-starts-with?(word-slice, "test-") continue
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# . . push args
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68/push "test-"/imm32
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52/push-edx
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# . . call
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e8/call slice-starts-with?/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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# . if (eax == false) break
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3d/compare-eax-and 0/imm32/false
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74/jump-if-= $subx-gen-run-tests:continue/disp8
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$subx-gen-run-tests:call-test-function:
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# tests-found? = true
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bb/copy-to-ebx 1/imm32/true
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# write(new-code-segment, " e8/call ")
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# . . push args
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68/push " e8/call "/imm32
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57/push-edi
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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-slice(new-code-segment, word-slice)
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# . . push args
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52/push-edx
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57/push-edi
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# . . call
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e8/call write-slice/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(new-code-segment, "/disp32\n")
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# . . push args
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68/push "/disp32\n"/imm32
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57/push-edi
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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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$subx-gen-run-tests:continue:
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# rewind-stream(line)
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# . . push args
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51/push-ecx
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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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# write-stream-data(out, line)
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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-stream-data/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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# loop
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e9/jump $subx-gen-run-tests:loop/disp32
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$subx-gen-run-tests:break:
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# if (!tests-found?) goto end
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81 7/subop/compare 3/mod/direct 3/rm32/ebx . . . . . 0/imm32/false # compare ebx
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74/jump-if-= $subx-gen-run-tests:end/disp8
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# write(new-code-segment, " c3/return\n")
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# . . push args
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68/push " c3/return\n"/imm32
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57/push-edi
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# write-stream-data(out, new-code-segment)
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# . . push args
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57/push-edi
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ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
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# . . call
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e8/call write-stream-data/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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$subx-gen-run-tests:end:
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# flush(out)
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# . . push args
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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 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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# . reclaim locals
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x21c/imm32 # add to esp
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# . restore registers
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5f/pop-to-edi
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5e/pop-to-esi
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5b/pop-to-ebx
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5a/pop-to-edx
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59/pop-to-ecx
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58/pop-to-eax
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# . epilogue
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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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# . . vim:nowrap:textwidth=0
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