diff options
Diffstat (limited to 'linux/survey_elf.subx')
| -rw-r--r-- | linux/survey_elf.subx | 4691 |
1 files changed, 4691 insertions, 0 deletions
diff --git a/linux/survey_elf.subx b/linux/survey_elf.subx new file mode 100644 index 00000000..ac2f05b4 --- /dev/null +++ b/linux/survey_elf.subx @@ -0,0 +1,4691 @@ +# Assign addresses (co-ordinates) to instructions (landmarks) in a program +# (landscape). +# Use the addresses assigned to: +# a) replace labels +# b) add an ELF header and segment headers with addresses and offsets correctly filled in +# +# To build: +# $ ./bootstrap translate init.linux [01]*.subx apps/subx-params.subx apps/survey_elf.subx -o apps/survey_elf +# +# The expected input is a stream of bytes with '==' segment headers, comments +# and some interspersed labels. +# $ cat x +# == code 0x1 +# l1: +# aa bb l1/imm8 +# cc dd l2/disp32 +# l2: +# ee foo/imm32 +# == data 0x10 +# foo: +# 00 +# +# The output is the stream of bytes without segment headers or label definitions, +# and with label references replaced with numeric values/displacements. +# +# $ cat x |./bootstrap run apps/survey_elf +# ...ELF header bytes... +# # ELF header above will specify that code segment begins at this offset +# aa bb nn # some computed address +# cc dd nn nn nn nn # some computed displacement +# ee nn nn nn nn # some computed address +# # ELF header above will specify that data segment begins at this offset +# 00 +# +# The ELF format has some persnickety constraints on the starting addresses of +# segments, so input headers are treated as guidelines and adjusted in the +# output. + +== 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 tests if necessary, convert stdin if not + # . prologue + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + + # Heap = new-segment(Heap-size) + # . . push args + 68/push Heap/imm32 + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Heap-size/disp32 # push *Heap-size + # . . call + e8/call new-segment/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # initialize-trace-stream(Trace-size) + # . . push args + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-size/disp32 # push *Heap-size + # . . call + e8/call initialize-trace-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + + # - if argc > 1 and argv[1] == "test", then return run_tests() + # if (argc <= 1) goto interactive + 81 7/subop/compare 1/mod/*+disp8 5/rm32/ebp . . . . 0/disp8 1/imm32 # compare *ebp + 7e/jump-if-<= $subx-survey-main:interactive/disp8 + # if (!kernel-string-equal?(argv[1], "test")) goto interactive + # . eax = kernel-string-equal?(argv[1], "test") + # . . push args + 68/push "test"/imm32 + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + # . . call + e8/call kernel-string-equal?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . if (eax == false) goto interactive + 3d/compare-eax-and 0/imm32/false + 74/jump-if-= $subx-survey-main:interactive/disp8 + # run-tests() + e8/call run-tests/disp32 + # syscall(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 + eb/jump $subx-survey-main:end/disp8 +$subx-survey-main:interactive: + # - otherwise convert stdin + # subx-survey(Stdin, Stdout) + # . . push args + 68/push Stdout/imm32 + 68/push Stdin/imm32 + # . . call + e8/call subx-survey/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # . write-stream(2/stderr, Trace-stream) +#? # . . push args +#? ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream +#? 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 + # syscall(exit, 0) + bb/copy-to-ebx 0/imm32 +$subx-survey-main:end: + e8/call syscall_exit/disp32 + +# data structures: +# segment-info: {address, file-offset, size} (12 bytes) +# segments: (addr stream {(handle array byte), segment-info}) (20 bytes per row) +# label-info: {segment-name: (handle array byte), segment-offset, address} (16 bytes) +# labels: (addr stream {(handle array byte), label-info}) (24 bytes per row) +# these are all inefficient, using sequential scans for lookups + +subx-survey: # infile: (addr buffered-file), out: (addr buffered-file) + # pseudocode + # var in: (stream byte Input-size) + # slurp(infile, in) + # var segments: (stream {segment-name, segment-info}) + # var labels: (stream {label-name, label-info} Max-labels) + # compute-offsets(in, segments, labels) + # compute-addresses(segments, labels) + # rewind-stream(in) + # emit-output(in, out, segments, labels) + # + # . 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 + 56/push-esi + # var segments/ecx: (stream {string, segment-info} 200) # 10 rows * 20 bytes/row + 81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0xc8/imm32 # subtract from esp + 68/push 0xc8/imm32/size + 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 labels/edx: (stream label-info Max-labels) + # . data + 2b/subtract 0/mod/indirect 5/rm32/.disp32 . . 4/r32/esp Max-labels/disp32 # subtract *Max-labels from esp + # . size + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Max-labels/disp32 # push *Max-labels + # . read + 68/push 0/imm32/read + # . write + 68/push 0/imm32/write + 89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx + # var in/esi: (stream byte Input-size) + # . data + 2b/subtract 0/mod/indirect 5/rm32/.disp32 . . 4/r32/esp Input-size/disp32 # subtract *Input-size from esp + # . size + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Input-size/disp32 # push *Input-size + # . read + 68/push 0/imm32/read + # . write + 68/push 0/imm32/write + 89/copy 3/mod/direct 6/rm32/esi . . . 4/r32/esp . . # copy esp to esi + # slurp(infile, in) + # . . push args + 56/push-esi + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + # . . call + e8/call slurp/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # compute-offsets(in, segments, labels) + # . . push args + 52/push-edx + 51/push-ecx + 56/push-esi + # . . call + e8/call compute-offsets/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # compute-addresses(segments, labels) + # . . push args + 52/push-edx + 51/push-ecx + # . . call + e8/call compute-addresses/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # rewind-stream(in) + # . . push args + 56/push-esi + # . . call + e8/call rewind-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # emit-output(in, out, segments, labels) + # . . push args + 52/push-edx + 51/push-ecx + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + 56/push-esi + # . . call + e8/call emit-output/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # add to esp + # flush(out) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + # . . call + e8/call flush/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +$subx-survey:end: + # . reclaim locals + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xec/imm32 # add to esp + 03/add 0/mod/indirect 5/rm32/.disp32 . . 4/r32/esp Max-labels/disp32 # add *Max-labels to esp + 03/add 0/mod/indirect 5/rm32/.disp32 . . 4/r32/esp Input-size/disp32 # add *Input-size to esp + # . restore registers + 5e/pop-to-esi + 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 + +test-subx-survey-computes-addresses: + # input: + # == code 0x1 + # Entry: + # ab x/imm32 + # == data 0x1000 + # x: + # 01 + # + # trace contains (in any order): + # label x is at address 0x1079 + # segment code starts at address 0x74 + # segment code has size 5 + # segment data starts at address 0x1079 + # + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . clear-stream(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream($_test-input-buffered-file->buffer) + # . . push args + 68/push $_test-input-buffered-file->buffer/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream(_test-output-stream) + # . . push args + 68/push _test-output-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream($_test-output-buffered-file->buffer) + # . . push args + 68/push $_test-output-buffered-file->buffer/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # initialize input + # . write(_test-input-stream, "== code 0x1\n") + # . . push args + 68/push "== code 0x1\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "Entry:\n") + # . . push args + 68/push "Entry:\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "ab x/imm32\n") + # . . push args + 68/push "ab x/imm32\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "== data 0x1000\n") + # . . push args + 68/push "== data 0x1000\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "x:\n") + # . . push args + 68/push "x:\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "01\n") + # . . push args + 68/push "01\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # subx-survey(_test-input-buffered-file, _test-output-buffered-file) + # . . push args + 68/push _test-output-buffered-file/imm32 + 68/push _test-input-buffered-file/imm32 + # . . call + e8/call subx-survey/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # check trace +#? # dump *Trace-stream {{{ +#? # . write(2/stderr, "^") +#? # . . push args +#? 68/push "^"/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, *Trace-stream) +#? # . . push args +#? ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream +#? 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 +#? # }}} + # . check-trace-contains("label 'x' is at address 0x00001079.", msg) + # . . push args + 68/push "F - test-subx-survey-computes-addresses/0"/imm32 + 68/push "label 'x' is at address 0x00001079."/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . check-trace-contains("segment 'code' starts at address 0x00000074.", msg) + # . . push args + 68/push "F - test-subx-survey-computes-addresses/1"/imm32 + 68/push "segment 'code' starts at address 0x00000074."/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . check-trace-contains("segment 'code' has size 0x00000005.", msg) + # . . push args + 68/push "F - test-subx-survey-computes-addresses/2"/imm32 + 68/push "segment 'code' has size 0x00000005."/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . check-trace-contains("segment 'data' starts at address 0x00001079.", msg) + # . . push args + 68/push "F - test-subx-survey-computes-addresses/3"/imm32 + 68/push "segment 'data' starts at address 0x00001079."/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +# global scratch space for compute-offsets +== data + +compute-offsets:file-offset: # int + 0/imm32 +compute-offsets:segment-offset: # int + 0/imm32 +compute-offsets:segment-tmp: # slice + 0/imm32/start + 0/imm32/end + +== code + +# write segments->file-offset, +# segments->size, +# labels->segment-name, and +# labels->segment-offset +compute-offsets: # in: (addr stream byte), segments: (addr stream {(handle array byte), segment-info}), labels: (addr stream {(handle array byte), label-info}) + # skeleton: + # for lines in 'in' + # for words in line + # switch word + # case 1 + # case 2 + # ... + # default + # + # pseudocode: + # var curr-segment-name: (handle array byte) + # var file-offset = 0 + # var segment-offset = 0 + # var line: (stream byte 512) + # var sinfo: (addr segment-info) + # var linfo: (addr label-info) + # while true # line loop + # clear-stream(line) + # read-line(in, line) + # if (line->write == 0) break # end of file + # while true # word loop + # word-slice = next-word(line) + # if slice-empty?(word-slice) # end of line + # break + # else if slice-starts-with?(word-slice, "#") # comment + # break # end of line + # else if slice-equal?(word-slice, "==") + # if *curr-segment-name != 0 + # sinfo = get-or-insert-handle(segments, curr-segment-name) + # sinfo->size = file-offset - sinfo->file-offset + # trace("segment '", curr-segment-name, "' has size ", sinfo->size) + # segment-tmp = next-word(line) + # if slice-empty?(segment-tmp) + # abort + # curr-segment-name = slice-to-string(segment-tmp) + # segment-tmp = next-word(line) + # if slice-empty?(segment-tmp) + # abort + # sinfo = get-or-insert-handle(segments, curr-segment-name) + # sinfo->starting-address = parse-hex-int-from-slice(segment-tmp) + # sinfo->file-offset = file-offset + # trace("segment '", curr-segment-name, "' is at file offset ", sinfo->file-offset) + # segment-offset = 0 + # break (next line) + # else if is-label?(word-slice) + # strip trailing ':' from word-slice + # linfo: (addr label-info) = get-or-insert-slice(labels, word-slice) + # linfo->segment-name = curr-segment-name + # trace("label '", word-slice, "' is in segment '", curr-segment-name, "'.") + # linfo->segment-offset = segment-offset + # trace("label '", word-slice, "' is at segment offset ", segment-offset, ".") + # # labels occupy no space, so no need to increment offsets + # else + # width = compute-width-of-slice(word-slice) + # segment-offset += width + # file-offset += width + # sinfo = get-or-insert-handle(segments, curr-segment-name) + # sinfo->size = file-offset - sinfo->file-offset + # + # . 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 + 56/push-esi + 57/push-edi + # var curr-segment-name/esi: (handle array byte) + 68/push 0/imm32 + 68/push 0/imm32 + 89/copy 3/mod/direct 6/rm32/esi . . . 4/r32/esp . . # copy esp to esi + # file-offset = 0 + c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . compute-offsets:file-offset/disp32 0/imm32 # copy to *compute-offsets:file-offset + # segment-offset = 0 + c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . compute-offsets:segment-offset/disp32 0/imm32 # copy to *compute-offsets:segment-offset + # var line/ecx: (stream byte 512) + 81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0x200/imm32 # subtract from esp + 68/push 0x200/imm32/size + 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: (addr slice) + 68/push 0/imm32 + 68/push 0/imm32 + 89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx +$compute-offsets:line-loop: + # clear-stream(line) + 51/push-ecx + e8/call clear-stream/disp32 + # . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # read-line(in, line) + 51/push-ecx + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + e8/call read-line/disp32 + # . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # if (line->write == 0) break + 8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax + 3d/compare-eax-and 0/imm32 + 0f 84/jump-if-= $compute-offsets:break-line-loop/disp32 +#? # dump line {{{ +#? # . write(2/stderr, "LL: ") +#? # . . push args +#? 68/push "LL: "/imm32 +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # write-stream(2/stderr, line) +#? # . . push args +#? 51/push-ecx +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write-stream/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # . write(2/stderr, "$\n") +#? # . . push args +#? 68/push "$\n"/imm32 +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # . rewind-stream(line) +#? # . . push args +#? 51/push-ecx +#? # . . call +#? e8/call rewind-stream/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +#? # }}} +$compute-offsets:word-loop: + # next-word(line, word-slice) + 52/push-edx + 51/push-ecx + e8/call next-word/disp32 + # . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +$compute-offsets:case-empty: + # if slice-empty?(word-slice) break + # . eax = slice-empty?(word-slice) + 52/push-edx + e8/call slice-empty?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . if (eax != false) break + 3d/compare-eax-and 0/imm32/false + 0f 85/jump-if-!= $compute-offsets:line-loop/disp32 +$compute-offsets:case-comment: + # if slice-starts-with?(word-slice, "#") continue + 68/push "#"/imm32 + 52/push-edx + e8/call slice-starts-with?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . if (eax != false) break + 3d/compare-eax-and 0/imm32/false + 0f 85/jump-if-!= $compute-offsets:line-loop/disp32 +$compute-offsets:case-segment-header: + # if (!slice-equal?(word-slice, "==")) goto next case + # . eax = slice-equal?(word-slice, "==") + 68/push "=="/imm32 + 52/push-edx + e8/call slice-equal?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . if (eax == false) goto next case + 3d/compare-eax-and 0/imm32/false + 0f 84/jump-if-= $compute-offsets:case-label/disp32 + # if (*curr-segment-name == 0) goto construct-next-segment + 81 7/subop/compare 0/mod/indirect 6/rm32/esi . . . . . 0/imm32 # compare *esi + 74/jump-if-= $compute-offsets:construct-next-segment/disp8 + # sinfo/edi = get-or-insert-handle(segments, curr-segment-name, row-size=16) + # . eax = get-or-insert-handle(segments, curr-segment-name, row-size=16) + # . . push args + 68/push 0x14/imm32/row-size + ff 6/subop/push 1/mod/*+disp8 6/rm32/esi . . . . 4/disp8 . # push *(esi+4) + ff 6/subop/push 0/mod/indirect 6/rm32/esi . . . . . . # push *esi + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + # . . call + e8/call get-or-insert-handle/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # add to esp + # . edi = eax + 89/copy 3/mod/direct 7/rm32/edi . . . 0/r32/eax . . # copy eax to edi + # sinfo->size = file-offset - sinfo->file-offset + # . save ecx + 51/push-ecx + # . ebx = *file-offset + 8b/copy 0/mod/indirect 5/rm32/.disp32 . . 3/r32/ebx compute-offsets:file-offset/disp32 # copy *file-offset to ebx + # . ecx = sinfo->file-offset + 8b/copy 1/mod/*+disp8 7/rm32/edi . . . 1/r32/ecx 4/disp8 . # copy *(edi+4) to ecx + # . ebx -= ecx + 29/subtract 3/mod/direct 3/rm32/ebx . . . 1/r32/ecx . . # subtract ecx from ebx + # . sinfo->size = ebx + 89/copy 1/mod/*+disp8 7/rm32/edi . . . 3/r32/ebx 8/disp8 . # copy ebx to *(edi+8) + # . restore ecx + 59/pop-to-ecx + # trace-sssns("segment '", curr-segment-name, "' has size ", sinfo->size, ".") + # . eax = lookup(curr-segment-name) + # . . push args + ff 6/subop/push 1/mod/*+disp8 6/rm32/esi . . . . 4/disp8 . # push *(esi+4) + ff 6/subop/push 0/mod/indirect 6/rm32/esi . . . . . . # push *esi + # . . call + e8/call lookup/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . trace-sssns("segment '", eax, "' has size ", sinfo->size, ".") + # . . push args + 68/push "."/imm32 + 53/push-ebx + 68/push "' has size "/imm32 + 50/push-eax + 68/push "segment '"/imm32 + # . . call + e8/call trace-sssns/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x14/imm32 # add to esp +$compute-offsets:construct-next-segment: + # next-word(line, segment-tmp) + 68/push compute-offsets:segment-tmp/imm32 + 51/push-ecx + e8/call next-word/disp32 + # . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # if slice-empty?(segment-tmp) abort + # . eax = slice-empty?(segment-tmp) + # . . push args + 68/push compute-offsets:segment-tmp/imm32 + # . . 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 != false) abort + 3d/compare-eax-and 0/imm32/false + 0f 85/jump-if-!= $compute-offsets:abort/disp32 +$compute-offsets:update-curr-segment-name: + # slice-to-string(Heap, segment-tmp, curr-segment-name) + # . . push args + 56/push-esi + 68/push compute-offsets:segment-tmp/imm32 + 68/push Heap/imm32 + # . . call + e8/call slice-to-string/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # next-word(line, segment-tmp) + 68/push compute-offsets:segment-tmp/imm32 + 51/push-ecx + e8/call next-word/disp32 + # . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # if slice-empty?(segment-tmp) abort + # . eax = slice-empty?(segment-tmp) + # . . push args + 68/push compute-offsets:segment-tmp/imm32 + # . . 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 != false) abort + 3d/compare-eax-and 0/imm32/false + 0f 85/jump-if-!= $compute-offsets:abort/disp32 + # sinfo/edi = get-or-insert-handle(segments, curr-segment-name, row-size=16) + # . eax = get-or-insert-handle(segments, curr-segment-name, row-size=16) + # . . push args + 68/push 0x14/imm32/row-size + ff 6/subop/push 1/mod/*+disp8 6/rm32/esi . . . . 4/disp8 . # push *(esi+4) + ff 6/subop/push 0/mod/indirect 6/rm32/esi . . . . . . # push *esi + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + # . . call + e8/call get-or-insert-handle/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # add to esp + # . edi = eax + 89/copy 3/mod/direct 7/rm32/edi . . . 0/r32/eax . . # copy eax to edi + # sinfo->address = parse-hex-int-from-slice(segment-tmp) + # . eax = parse-hex-int-from-slice(segment-tmp) + # . . push args + 68/push compute-offsets:segment-tmp/imm32 + # . . call + e8/call parse-hex-int-from-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . sinfo->address = eax + 89/copy 0/mod/indirect 7/rm32/edi . . . 0/r32/eax . . # copy eax to *edi + # sinfo->file-offset = *file-offset + 8b/copy 0/mod/indirect 5/rm32/.disp32 . . 0/r32/eax compute-offsets:file-offset/disp32 # copy *file-offset to eax + 89/copy 1/mod/*+disp8 7/rm32/edi . . . 0/r32/eax 4/disp8 . # copy eax to *(edi+4) + # trace-sssns("segment '", curr-segment-name, "' is at file offset ", sinfo->file-offset, "") + # . eax = lookup(curr-segment-name) + # . . push args + ff 6/subop/push 1/mod/*+disp8 6/rm32/esi . . . . 4/disp8 . # push *(esi+4) + ff 6/subop/push 0/mod/indirect 6/rm32/esi . . . . . . # push *esi + # . . call + e8/call lookup/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . trace-sssns("segment '", eax, "' is at file offset ", file-offset, ".") + # . . push args + 68/push "."/imm32 + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . compute-offsets:file-offset/disp32 # push *file-offset + 68/push "' is at file offset "/imm32 + 50/push-eax + 68/push "segment '"/imm32 + # . . call + e8/call trace-sssns/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x14/imm32 # add to esp + # segment-offset = 0 + c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . compute-offsets:segment-offset/disp32 0/imm32 # copy to *segment-offset + # break + e9/jump $compute-offsets:line-loop/disp32 +$compute-offsets:case-label: + # if (!is-label?(word-slice)) goto next case + # . eax = is-label?(word-slice) + # . . push args + 52/push-edx + # . . call + e8/call is-label?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . if (eax == false) goto next case + 3d/compare-eax-and 0/imm32/false + 0f 84/jump-if-= $compute-offsets:case-default/disp32 + # strip trailing ':' from word-slice + ff 1/subop/decrement 1/mod/*+disp8 2/rm32/edx . . . . 4/disp8 . # decrement *(edx+4) + # linfo/edi = get-or-insert-slice(labels, word-slice, row-size=24) + # . eax = get-or-insert-slice(labels, word-slice, row-size=24) + # . . push args + 68/push Heap/imm32 + 68/push 0x18/imm32/row-size + 52/push-edx + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x10/disp8 . # push *(ebp+16) + # . . call + e8/call get-or-insert-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # add to esp + # . edi = eax + 89/copy 3/mod/direct 7/rm32/edi . . . 0/r32/eax . . # copy eax to edi +$compute-offsets:save-label-offset: + # linfo->segment-name = curr-segment-name + 8b/copy 0/mod/indirect 6/rm32/esi . . . 0/r32/eax . . # copy *esi to eax + 89/copy 0/mod/indirect 7/rm32/edi . . . 0/r32/eax . . # copy eax to *edi + 8b/copy 1/mod/*+disp8 6/rm32/esi . . . 0/r32/eax 4/disp8 . # copy *(esi+4) to eax + 89/copy 1/mod/*+disp8 7/rm32/edi . . . 0/r32/eax 4/disp8 . # copy eax to *(edi+4) + # trace-slsss("label '" word-slice "' is in segment '" current-segment-name "'.") + # . eax = lookup(curr-segment-name) + # . . push args + ff 6/subop/push 1/mod/*+disp8 6/rm32/esi . . . . 4/disp8 . # push *(esi+4) + ff 6/subop/push 0/mod/indirect 6/rm32/esi . . . . . . # push *esi + # . . call + e8/call lookup/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . trace-slsss("label '" word-slice "' is in segment '" eax "'.") + # . . push args + 68/push "'."/imm32 + 50/push-eax + 68/push "' is in segment '"/imm32 + 52/push-edx + 68/push "label '"/imm32 + # . . call + e8/call trace-slsss/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x14/imm32 # add to esp + # linfo->segment-offset = segment-offset + # . ebx = segment-offset + 8b/copy 0/mod/indirect 5/rm32/.disp32 . . 3/r32/ebx compute-offsets:segment-offset/disp32 # copy *segment-offset to ebx + # . linfo->segment-offset = ebx + 89/copy 1/mod/*+disp8 7/rm32/edi . . . 3/r32/ebx 8/disp8 . # copy ebx to *(edi+8) + # trace-slsns("label '" word-slice "' is at segment offset " *segment-offset/eax ".") + # . . push args + 68/push "."/imm32 + 53/push-ebx + 68/push "' is at segment offset "/imm32 + 52/push-edx + 68/push "label '"/imm32 + # . . call + e8/call trace-slsns/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x14/imm32 # add to esp + # continue + e9/jump $compute-offsets:word-loop/disp32 +$compute-offsets:case-default: + # width/eax = compute-width-of-slice(word-slice) + # . . push args + 52/push-edx + # . . call + e8/call compute-width-of-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # segment-offset += width + 01/add 0/mod/indirect 5/rm32/.disp32 . . 0/r32/eax compute-offsets:segment-offset/disp32 # add eax to *segment-offset + # file-offset += width + 01/add 0/mod/indirect 5/rm32/.disp32 . . 0/r32/eax compute-offsets:file-offset/disp32 # add eax to *file-offset +#? # dump segment-offset {{{ +#? # . write(2/stderr, "segment-offset: ") +#? # . . push args +#? 68/push "segment-offset: "/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->buffer) +#? # . . push args +#? 68/push $Stderr->buffer/imm32 +#? # . . call +#? e8/call clear-stream/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +#? # . write-int32-hex-buffered(Stderr, segment-offset) +#? # . . push args +#? 52/push-edx +#? ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . compute-offsets:segment-offset/disp32 # push *segment-offset +#? 68/push Stderr/imm32 +#? # . . call +#? e8/call write-int32-hex-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 Newline/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 +#? # }}} + e9/jump $compute-offsets:word-loop/disp32 +$compute-offsets:break-line-loop: + # sinfo/edi = get-or-insert-handle(segments, curr-segment-name, row-size=16) + # . eax = get-or-insert-handle(segments, curr-segment-name, row-size=16) + # . . push args + 68/push 0x14/imm32/row-size + ff 6/subop/push 1/mod/*+disp8 6/rm32/esi . . . . 4/disp8 . # push *(esi+4) + ff 6/subop/push 0/mod/indirect 6/rm32/esi . . . . . . # push *esi + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + # . . call + e8/call get-or-insert-handle/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # add to esp + # . edi = eax + 89/copy 3/mod/direct 7/rm32/edi . . . 0/r32/eax . . # copy eax to edi + # sinfo->size = file-offset - sinfo->file-offset + # . save ecx + 51/push-ecx + # . ebx = *file-offset + 8b/copy 0/mod/indirect 5/rm32/.disp32 . . 3/r32/ebx compute-offsets:file-offset/disp32 # copy *file-offset to ebx + # . ecx = sinfo->file-offset + 8b/copy 1/mod/*+disp8 7/rm32/edi . . . 1/r32/ecx 4/disp8 . # copy *(edi+4) to ecx + # . ebx -= ecx + 29/subtract 3/mod/direct 3/rm32/ebx . . . 1/r32/ecx . . # subtract ecx from ebx + # . sinfo->size = ebx + 89/copy 1/mod/*+disp8 7/rm32/edi . . . 3/r32/ebx 8/disp8 . # copy ebx to *(edi+8) + # . restore ecx + 59/pop-to-ecx + # trace-sssns("segment '", curr-segment-name, "' has size ", sinfo->size, ".") + # . eax = lookup(curr-segment-name) + # . . push args + ff 6/subop/push 1/mod/*+disp8 6/rm32/esi . . . . 4/disp8 . # push *(esi+4) + ff 6/subop/push 0/mod/indirect 6/rm32/esi . . . . . . # push *esi + # . . call + e8/call lookup/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . trace-sssns("segment '", eax, "' has size ", ebx, ".") + # . . push args + 68/push "."/imm32 + 53/push-ebx + 68/push "' has size "/imm32 + 50/push-eax + 68/push "segment '"/imm32 + # . . call + e8/call trace-sssns/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x14/imm32 # add to esp +$compute-offsets:end: + # . reclaim locals + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x21c/imm32 # add to esp + # . restore registers + 5f/pop-to-edi + 5e/pop-to-esi + 5b/pop-to-ebx + 5a/pop-to-edx + 59/pop-to-ecx + 58/pop-to-eax + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +$compute-offsets:abort: + # . _write(2/stderr, error) + # . . push args + 68/push "'==' must be followed by segment name and segment-start\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 + # . syscall(exit, 1) + bb/copy-to-ebx 1/imm32 + e8/call syscall_exit/disp32 + # never gets here + +test-compute-offsets: + # input: + # == code 0x1 + # ab x/imm32 # skip comment + # == data 0x1000 + # 00 + # x: + # 34 + # + # trace contains (in any order): + # segment 'code' is at file offset 0x0. + # segment 'code' has size 0x5. + # segment 'data' is at file offset 0x5. + # segment 'data' has size 0x2. + # label 'x' is in segment 'data'. + # label 'x' is at segment offset 0x1. + # + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . clear-stream(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # var segments/ecx: (stream byte 2*20) + 81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0x28/imm32 # subtract from esp + 68/push 0x28/imm32/size + 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 labels/edx: (stream byte 2*24) + 81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0x30/imm32 # subtract from esp + 68/push 0x30/imm32/size + 68/push 0/imm32/read + 68/push 0/imm32/write + 89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx + # initialize input + # . write(_test-input-stream, "== code 0x1\n") + # . . push args + 68/push "== code 0x1\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "ab x/imm32 # skip comment\n") + # . . push args + 68/push "ab x/imm32 # skip comment\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "== data 0x1000\n") + # . . push args + 68/push "== data 0x1000\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "00\n") + # . . push args + 68/push "00\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "x:\n") + # . . push args + 68/push "x:\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "34\n") + # . . push args + 68/push "34\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # compute-offsets(_test-input-stream, segments, labels) + # . . push args + 52/push-edx + 51/push-ecx + 68/push _test-input-stream/imm32 + # . . call + e8/call compute-offsets/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp +#? # dump *Trace-stream {{{ +#? # . write(2/stderr, "^") +#? # . . push args +#? 68/push "^"/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, *Trace-stream) +#? # . . push args +#? ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream +#? 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 +#? # }}} + # check trace + # . check-trace-contains("segment 'code' is at file offset 0x00000000.", msg) + # . . push args + 68/push "F - test-compute-offsets/0"/imm32 + 68/push "segment 'code' is at file offset 0x00000000."/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . check-trace-contains("segment 'code' has size 0x00000005", msg) + # . . push args + 68/push "F - test-compute-offsets/1"/imm32 + 68/push "segment 'code' has size 0x00000005."/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . check-trace-contains("segment 'data' is at file offset 0x00000005.", msg) + # . . push args + 68/push "F - test-compute-offsets/2"/imm32 + 68/push "segment 'data' is at file offset 0x00000005."/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . check-trace-contains("segment 'data' has size 0x00000002.", msg) + # . . push args + 68/push "F - test-compute-offsets/3"/imm32 + 68/push "segment 'data' has size 0x00000002."/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . check-trace-contains("label 'x' is in segment 'data'.", msg) + # . . push args + 68/push "F - test-compute-offsets/4"/imm32 + 68/push "label 'x' is in segment 'data'."/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . check-trace-contains("label 'x' is at segment offset 0x00000001.", msg) + # . . push args + 68/push "F - test-compute-offsets/5"/imm32 + 68/push "label 'x' is at segment offset 0x00000001."/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . check-ints-equal(labels->write, 0x18, msg) + # . . push args + 68/push "F - test-compute-offsets-maintains-labels-write-index"/imm32 + 68/push 0x18/imm32/1-entry + ff 6/subop/push 0/mod/indirect 2/rm32/edx . . . . . . # push *edx + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +# write segments->file-offset, +# segments->address, and +# labels->address +compute-addresses: # segments: (addr stream {(handle array byte), segment-info}), labels: (addr stream {(handle array byte), label-info}) + # pseudocode: + # var srow: (addr segment-row) = segments->data + # var max: (addr byte) = &segments->data[segments->write] + # var num-segments: int = segments->write / 20 + # var starting-offset: int = 0x34 + (num-segments * 0x20) + # while true + # if (srow >= max) break + # srow->file-offset += starting-offset + # srow->address &= 0xfffff000 # clear last 12 bits for p_align + # srow->address += (srow->file-offset & 0x00000fff) + # trace-sssns("segment " srow->key " starts at address " srow->address) + # srow += 20 # row-size + # var lrow: (addr label-row) = labels->data + # max = &labels->data[labels->write] + # while true + # if (lrow >= max) break + # var seg-name: (addr array byte) = lookup(lrow->segment-name) + # var label-seg: (addr segment-info) = get(segments, seg-name) + # lrow->address = label-seg->address + lrow->segment-offset + # trace-sssns("label " lrow->key " is at address " lrow->address) + # lrow += 24 # row-size + # + # . 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 + 56/push-esi + 57/push-edi + # esi = segments + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 8/disp8 . # copy *(ebp+8) to esi + # var num-segments/edi: int = segments->write / 20 (row-size) + # . eax = segments->write + 8b/copy 0/mod/indirect 6/rm32/esi . . . 0/r32/eax . . # copy *esi to eax + # . edx = 0 + ba/copy-to-edx 0/imm32 + # . ecx = 20 (row-size) + b9/copy-to-ecx 0x14/imm32/row-size + # . eax /= ecx (clobbering edx) + f7 7/subop/divide 3/mod/direct 1/rm32/ecx . . . . . . # divide eax by ecx + # . edi = eax + 89/copy 3/mod/direct 7/rm32/edi . . . 0/r32/eax . . # copy eax to edi + # var starting-offset/edi: int = 0x34 + (num-segments * 0x20) # make room for ELF headers + c1/shift 4/subop/left 3/mod/direct 7/rm32/edi . . . . . 5/imm8 # shift edi left by 5 bits + 81 0/subop/add 3/mod/direct 7/rm32/edi . . . . . 0x34/imm32 # add to edi + # var max/ecx: (addr byte) = &segments->data[segments->write] + 8b/copy 0/mod/indirect 6/rm32/esi . . . 1/r32/ecx . . # copy *esi to ecx + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 1/index/ecx . 1/r32/ecx 0xc/disp8 . # copy esi+ecx+12 to ecx + # var srow/esi: (addr segment-row) = segments->data + 8d/copy-address 1/mod/*+disp8 6/rm32/esi . . . 6/r32/esi 0xc/disp8 . # copy esi+12 to esi +$compute-addresses:segment-loop: + # if (srow >= max) break + 39/compare 3/mod/direct 6/rm32/esi . . . 1/r32/ecx . . # compare esi with ecx + 73/jump-if-addr>= $compute-addresses:segment-break/disp8 + # srow->file-offset += starting-offset + 01/add 1/mod/*+disp8 6/rm32/esi . . . 7/r32/edi 0xc/disp8 . # add edi to *(esi+12) + # clear last 12 bits of srow->address for p_align=0x1000 + # . edx = srow->address + 8b/copy 1/mod/*+disp8 6/rm32/esi . . . 2/r32/edx 8/disp8 . # copy *(esi+8) to edx + # . edx &= 0xfffff000 + 81 4/subop/and 3/mod/direct 2/rm32/edx . . . . . 0xfffff000/imm32 # bitwise and of edx + # update last 12 bits from srow->file-offset + # . ebx = srow->file-offset + 8b/copy 1/mod/*+disp8 6/rm32/esi . . . 3/r32/ebx 0xc/disp8 . # copy *(esi+12) to ebx + # . ebx &= 0xfff + 81 4/subop/and 3/mod/direct 3/rm32/ebx . . . . . 0x00000fff/imm32 # bitwise and of ebx + # . srow->address = edx | ebx + 09/or 3/mod/direct 2/rm32/edx . . . 3/r32/ebx . . # edx = bitwise OR with ebx + 89/copy 1/mod/*+disp8 6/rm32/esi . . . 2/r32/edx 8/disp8 . # copy edx to *(esi+8) + # trace-sssns("segment " srow " starts at address " srow->address ".") + # . eax = lookup(*srow) + # . . push args + ff 6/subop/push 1/mod/*+disp8 6/rm32/esi . . . . 4/disp8 . # push *(esi+4) + ff 6/subop/push 0/mod/indirect 6/rm32/esi . . . . . . # push *esi + # . . call + e8/call lookup/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . trace-sssns("segment " eax " starts at address " srow->address ".") + # . . push args + 68/push "."/imm32 + 52/push-edx + 68/push "' starts at address "/imm32 + 50/push-eax + 68/push "segment '"/imm32 + # . . call + e8/call trace-sssns/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x14/imm32 # add to esp + # srow += 20 # size of row + 81 0/subop/add 3/mod/direct 6/rm32/esi . . . . . 0x14/imm32 # add to esi + eb/jump $compute-addresses:segment-loop/disp8 +$compute-addresses:segment-break: +#? # dump *Trace-stream {{{ +#? # . write(2/stderr, "^") +#? # . . push args +#? 68/push "^"/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, *Trace-stream) +#? # . . push args +#? ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream +#? 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 +#? # }}} + # esi = labels + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 0xc/disp8 . # copy *(ebp+12) to esi + # var max/ecx: (addr byte) = &labels->data[labels->write] + 8b/copy 0/mod/indirect 6/rm32/esi . . . 1/r32/ecx . . # copy *esi to ecx + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 1/index/ecx . 1/r32/ecx 0xc/disp8 . # copy esi+ecx+12 to ecx + # var lrow/esi: (addr label-row) = labels->data + 8d/copy-address 1/mod/*+disp8 6/rm32/esi . . . 6/r32/esi 0xc/disp8 . # copy esi+12 to esi +$compute-addresses:label-loop: + # if (lrow >= max) break + 39/compare 3/mod/direct 6/rm32/esi . . . 1/r32/ecx . . # compare esi with ecx + 0f 83/jump-if-addr>= $compute-addresses:end/disp32 +#? # dump lrow->key {{{ +#? # . write(2/stderr, "label: ") +#? # . . push args +#? 68/push "label: "/imm32 +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # . write(2/stderr, lrow->key) +#? # . . push args +#? ff 6/subop/push 0/mod/indirect 6/rm32/esi . . . . . . # push *esi +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # . write(2/stderr, "$\n") +#? # . . push args +#? 68/push "$\n"/imm32 +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # }}} + # var seg-name/edx: (addr array byte) = lookup(lrow->segment-name) + # . eax = lookup(lrow->segment-name) + # . . push args + ff 6/subop/push 1/mod/*+disp8 6/rm32/esi . . . . 0xc/disp8 . # push *(esi+12) + ff 6/subop/push 1/mod/*+disp8 6/rm32/esi . . . . 8/disp8 . # push *(esi+8) + # . . call + e8/call lookup/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . edx = eax + 89/copy 3/mod/direct 2/rm32/edx . . . 0/r32/eax . . # copy eax to edx +#? # dump seg-name {{{ +#? # . write(2/stderr, "compute-addresses: seg-name: ") +#? # . . push args +#? 68/push "seg-name: "/imm32 +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # . write(2/stderr, seg-name) +#? # . . push args +#? 52/push-edx +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # . write(2/stderr, "$\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 +#? # }}} + # var label-seg/edx: (addr segment-info) = get(segments, seg-name, row-size=20, "segment table") + # . eax = get(segments, seg-name, row-size=20) + # . . push args + 68/push "segment table"/imm32 + 68/push 0x14/imm32/row-size + 52/push-edx + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + # . . call + e8/call get/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # add to esp + # . edx = eax + 89/copy 3/mod/direct 2/rm32/edx . . . 0/r32/eax . . # copy eax to edx + # ebx = label-seg->address + 8b/copy 0/mod/indirect 2/rm32/edx . . . 3/r32/ebx . . # copy *edx to ebx + # ebx += lrow->segment-offset + 03/add 1/mod/*+disp8 6/rm32/esi . . . 3/r32/ebx 0x10/disp8 . # add *(esi+16) to ebx + # lrow->address = ebx + 89/copy 1/mod/*+disp8 6/rm32/esi . . . 3/r32/ebx 0x14/disp8 . # copy ebx to *(esi+20) + # trace-sssns("label " lrow->key " is at address " lrow->address ".") + # . eax = lookup(lrow->key) + # . . push args + ff 6/subop/push 1/mod/*+disp8 6/rm32/esi . . . . 4/disp8 . # push *(esi+4) + ff 6/subop/push 0/mod/indirect 6/rm32/esi . . . . . . # push *esi + # . . call + e8/call lookup/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . trace-sssns("label " eax " is at address " lrow->address ".") + # . . push args + 68/push "."/imm32 + 53/push-ebx + 68/push "' is at address "/imm32 + 50/push-eax + 68/push "label '"/imm32 + # . . call + e8/call trace-sssns/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x14/imm32 # add to esp + # lrow += 24 # size of row + 81 0/subop/add 3/mod/direct 6/rm32/esi . . . . . 0x18/imm32 # add to esi + e9/jump $compute-addresses:label-loop/disp32 +$compute-addresses:end: + # . restore registers + 5f/pop-to-edi + 5e/pop-to-esi + 5b/pop-to-ebx + 5a/pop-to-edx + 59/pop-to-ecx + 58/pop-to-eax + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-compute-addresses: + # input: + # segments: + # - 'a': {0x1000, 0, 5} + # - 'b': {0x2018, 5, 1} + # - 'c': {0x5444, 6, 12} + # labels: + # - 'l1': {'a', 3, 0} + # - 'l2': {'b', 0, 0} + # + # trace contains in any order (comments in parens): + # segment 'a' starts at address 0x00001094. (0x34 + 0x20 for each segment) + # segment 'b' starts at address 0x00002099. (0x018 discarded) + # segment 'c' starts at address 0x0000509a. (0x444 discarded) + # label 'l1' is at address 0x00001097. (0x1094 + segment-offset 3) + # label 'l2' is at address 0x00002099. (0x2099 + segment-offset 0) + # + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . var segments/ecx: (stream byte 10*20) + 81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0xc8/imm32 # subtract from esp + 68/push 0xc8/imm32/size + 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 labels/edx: (stream byte 8*24) + 81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0xc0/imm32 # subtract from esp + 68/push 0xc0/imm32/size + 68/push 0/imm32/read + 68/push 0/imm32/write + 89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx + # . var h/ebx: (handle array byte) + 68/push 0/imm32 + 68/push 0/imm32 + 89/copy 3/mod/direct 3/rm32/ebx . . . 4/r32/esp . . # copy esp to ebx + # . h = copy-array(Heap, "a") + # . . push args + 53/push-ebx + 68/push "a"/imm32 + 68/push Heap/imm32 + # . . call + e8/call copy-array/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # . stream-add5(segments, "a", 0x1000, 0, 5) + # . . push args + 68/push 5/imm32/segment-size + 68/push 0/imm32/file-offset + 68/push 0x1000/imm32/start-address + ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4) + ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx + 51/push-ecx + # . . call + e8/call stream-add5/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x18/imm32 # add to esp + # . h = copy-array(Heap, "b") + # . . push args + 53/push-ebx + 68/push "b"/imm32 + 68/push Heap/imm32 + # . . call + e8/call copy-array/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # . stream-add5(segments, "b", 0x2018, 5, 1) + # . . push args + 68/push 1/imm32/segment-size + 68/push 5/imm32/file-offset + 68/push 0x2018/imm32/start-address + ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4) + ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx + 51/push-ecx + # . . call + e8/call stream-add5/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x18/imm32 # add to esp + # . h = copy-array(Heap, "c") + # . . push args + 53/push-ebx + 68/push "c"/imm32 + 68/push Heap/imm32 + # . . call + e8/call copy-array/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # . stream-add5(segments, "c", 0x5444, 6, 12) + 68/push 0xc/imm32/segment-size + 68/push 6/imm32/file-offset + 68/push 0x5444/imm32/start-address + ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4) + ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx + 51/push-ecx + # . . call + e8/call stream-add5/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x18/imm32 # add to esp + # . stream-add6(labels, "l1", "a", 3, 0) + # . . push args + 68/push 0/imm32/label-address + 68/push 3/imm32/segment-offset + # . . push "a" + 53/push-ebx + 68/push "a"/imm32 + 68/push Heap/imm32 + e8/call copy-array/disp32 + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4) + ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx + # . . push "l1" + 53/push-ebx + 68/push "l1"/imm32 + 68/push Heap/imm32 + e8/call copy-array/disp32 + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4) + ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx + # . . push labels + 52/push-edx + # . . call + e8/call stream-add6/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x1c/imm32 # add to esp + # . stream-add6(labels, "l2", "b", 0, 0) + # . . push args + 68/push 0/imm32/label-address + 68/push 0/imm32/segment-offset + # . . push "b" + 53/push-ebx + 68/push "b"/imm32 + 68/push Heap/imm32 + e8/call copy-array/disp32 + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4) + ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx + # . . push "l2" + 53/push-ebx + 68/push "l2"/imm32 + 68/push Heap/imm32 + e8/call copy-array/disp32 + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4) + ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx + # . . push labels + 52/push-edx + # . . call + e8/call stream-add6/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x1c/imm32 # add to esp + # component under test + # . compute-addresses(segments, labels) + # . . push args + 52/push-edx + 51/push-ecx + # . . call + e8/call compute-addresses/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # checks +#? # dump *Trace-stream {{{ +#? # . write(2/stderr, "^") +#? # . . push args +#? 68/push "^"/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, *Trace-stream) +#? # . . push args +#? ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream +#? 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 +#? # }}} + # . check-trace-contains("segment 'a' starts at address 0x00001094.", msg) + # . . push args + 68/push "F - test-compute-addresses/0"/imm32 + 68/push "segment 'a' starts at address 0x00001094."/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . check-trace-contains("segment 'b' starts at address 0x00002099.", msg) + # . . push args + 68/push "F - test-compute-addresses/1"/imm32 + 68/push "segment 'b' starts at address 0x00002099."/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . check-trace-contains("segment 'c' starts at address 0x0000509a.", msg) + # . . push args + 68/push "F - test-compute-addresses/2"/imm32 + 68/push "segment 'c' starts at address 0x0000509a."/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . check-trace-contains("label 'l1' is at address 0x00001097.", msg) + # . . push args + 68/push "F - test-compute-addresses/3"/imm32 + 68/push "label 'l1' is at address 0x00001097."/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . check-trace-contains("label 'l2' is at address 0x00002099.", msg) + # . . push args + 68/push "F - test-compute-addresses/4"/imm32 + 68/push "label 'l2' is at address 0x00002099."/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . check-ints-equal(labels->write, 0x30, msg) + # . . push args + 68/push "F - test-compute-addresses/maintains-labels-write-index"/imm32 + 68/push 0x30/imm32/2-entries + ff 6/subop/push 0/mod/indirect 2/rm32/edx . . . . . . # push *edx + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-compute-addresses-large-segments: + # input: + # segments: + # - 'a': {0x1000, 0, 0x5604} + # - 'b': {0x2018, 0x5604, 1} + # labels: + # - 'l1': {'a', 3, 0} + # + # trace contains in any order (comments in parens): + # segment 'a' starts at address 0x00001074. (0x34 + 0x20 for each segment) + # segment 'b' starts at address 0x00002678. (0x018 discarded; last 3 nibbles from 0x1074 + 0x5604) + # label 'l1' is at address 0x00001077. (0x1074 + segment-offset 3) + # + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . var segments/ecx: (stream byte 10*20) + 81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0xc8/imm32 # subtract from esp + 68/push 0xc8/imm32/size + 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 labels/edx: (stream byte 8*24) + 81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0xc0/imm32 # subtract from esp + 68/push 0xc0/imm32/size + 68/push 0/imm32/read + 68/push 0/imm32/write + 89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx + # . var h/ebx: (handle array byte) + 68/push 0/imm32 + 68/push 0/imm32 + 89/copy 3/mod/direct 3/rm32/ebx . . . 4/r32/esp . . # copy esp to ebx + # . h = copy-array(Heap, "a") + # . . push args + 53/push-ebx + 68/push "a"/imm32 + 68/push Heap/imm32 + # . . call + e8/call copy-array/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # . stream-add5(segments, "a", 0x1000, 0, 0x5604) + 68/push 0x5604/imm32/segment-size + 68/push 0/imm32/file-offset + 68/push 0x1000/imm32/start-address + ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4) + ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx + 51/push-ecx + # . . call + e8/call stream-add5/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x18/imm32 # add to esp + # . h = copy-array(Heap, "b") + # . . push args + 53/push-ebx + 68/push "b"/imm32 + 68/push Heap/imm32 + # . . call + e8/call copy-array/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # . stream-add5(segments, "b", 0x2018, 0x5604, 1) + 68/push 1/imm32/segment-size + 68/push 0x5604/imm32/file-offset + 68/push 0x2018/imm32/start-address + ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4) + ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx + 51/push-ecx + # . . call + e8/call stream-add5/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x18/imm32 # add to esp + # . stream-add6(labels, "l1", "a", 3, 0) + 68/push 0/imm32/label-address + 68/push 3/imm32/segment-offset + # . . push "a" + 53/push-ebx + 68/push "a"/imm32 + 68/push Heap/imm32 + e8/call copy-array/disp32 + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4) + ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx + # . . push "l1" + 53/push-ebx + 68/push "l1"/imm32 + 68/push Heap/imm32 + e8/call copy-array/disp32 + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4) + ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx + # . . push labels + 52/push-edx + # . . call + e8/call stream-add6/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x1c/imm32 # add to esp + # component under test + # . compute-addresses(segments, labels) + # . . push args + 52/push-edx + 51/push-ecx + # . . call + e8/call compute-addresses/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # checks +#? # dump *Trace-stream {{{ +#? # . write(2/stderr, "^") +#? # . . push args +#? 68/push "^"/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, *Trace-stream) +#? # . . push args +#? ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream +#? 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 +#? # }}} + # . check-trace-contains("segment 'a' starts at address 0x00001074.", msg) + # . . push args + 68/push "F - test-compute-addresses-large-segments/0"/imm32 + 68/push "segment 'a' starts at address 0x00001074."/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . check-trace-contains("segment 'b' starts at address 0x00002678.", msg) + # . . push args + 68/push "F - test-compute-addresses-large-segments/1"/imm32 + 68/push "segment 'b' starts at address 0x00002678."/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . check-trace-contains("label 'l1' is at address 0x00001077.", msg) + # . . push args + 68/push "F - test-compute-addresses-large-segments/3"/imm32 + 68/push "label 'l1' is at address 0x00001077."/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +emit-output: # in: (addr stream byte), out: (addr buffered-file), segments: (addr stream {(handle array byte), segment-info}), labels: (addr stream {(handle array byte), label-info}) + # pseudocode: + # emit-headers(out, segments, labels) + # emit-segments(in, out, labels) + # + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp +#? # write(2/stderr, "emit-headers\n") {{{ +#? # . . push args +#? 68/push "emit-headers\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 +#? # }}} + # emit-headers(out, segments, labels) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x14/disp8 . # push *(ebp+20) + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x10/disp8 . # push *(ebp+16) + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + # . . call + e8/call emit-headers/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp +#? # write(2/stderr, "emit-segments\n") {{{ +#? # . . push args +#? 68/push "emit-segments\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 +#? # }}} + # emit-segments(in, out, labels) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x14/disp8 . # push *(ebp+20) + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + # . . call + e8/call emit-segments/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp +$emit-output:end: + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +# global scratch space for emit-segments +== data + +emit-segments:datum: # slice + 0/imm32/start + 0/imm32/end + +== code + +emit-segments: # in: (addr stream byte), out: (addr buffered-file), labels: (addr stream {(handle array byte), label-info}) + # pseudocode: + # var offset-of-next-instruction = 0 + # var line: (stream byte 512) + # line-loop: + # while true + # clear-stream(line) + # read-line(in, line) + # if (line->write == 0) break # end of file + # offset-of-next-instruction += num-bytes(line) + # var is-far-jump-or-call? = is-far-jump-or-call?(line) + # rewind-stream(line) + # while true + # var word-slice = next-word(line) + # if slice-empty?(word-slice) # end of line + # break + # if slice-starts-with?(word-slice, "#") # comment + # break + # if is-label?(word-slice) # no need for label declarations anymore + # goto line-loop # don't insert empty lines + # if slice-equal?(word-slice, "==") # no need for segment header lines + # goto line-loop # don't insert empty lines + # if length(word-slice) == 2 + # write-slice-buffered(out, word-slice) + # write-buffered(out, " ") + # continue + # var datum: (addr slice) = next-token-from-slice(word-slice->start, word-slice->end, "/") + # var info: (addr label-info) = get-slice(labels, datum) + # if has-metadata?(word-slice, "imm8") + # abort + # else if has-metadata?(word-slice, "imm32") + # emit(out, info->address, 4) + # else if has-metadata?(word-slice, "disp8") + # value = info->offset - offset-of-next-instruction + # emit(out, value, 1) + # else if has-metadata?(word-slice, "disp32") + # if is-far-jump-or-call? + # value = info->offset - offset-of-next-instruction + # else + # value = info->address + # emit(out, value, 4) + # else + # abort + # write-buffered(out, "\n") + # + # registers: + # line: ecx + # word-slice: edx + # offset-of-next-instruction: ebx + # is-far-jump-or-call?: edi + # info: esi (inner loop only) + # temporaries: eax, esi (outer loop) + # + # . 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 + 56/push-esi + 57/push-edi + # var line/ecx: (stream byte 512) + 81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0x200/imm32 # subtract from esp + 68/push 0x200/imm32/size + 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: slice + 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 + # offset-of-next-instruction/ebx = 0 + 31/xor 3/mod/direct 3/rm32/ebx . . . 3/r32/ebx . . # clear ebx +$emit-segments:line-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(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/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # 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 +#? # . 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 +#? # }}} +$emit-segments:check-for-end-of-input: + # if (line->write == 0) break + 81 7/subop/compare 0/mod/indirect 1/rm32/ecx . . . . . 0/imm32 # compare *ecx + 0f 84/jump-if-= $emit-segments:end/disp32 + # offset-of-next-instruction += num-bytes(line) + # . eax = num-bytes(line) + # . . push args + 51/push-ecx + # . . call + e8/call num-bytes/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . ebx += eax + 01/add 3/mod/direct 3/rm32/ebx . . . 0/r32/eax . . # add eax to ebx + # var is-far-jump-or-call?/edi: boolean = is-far-jump-or-call?(line) + # . . push args + 51/push-ecx + # . . call + e8/call is-far-jump-or-call?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # rewind-stream(line) + # . . push args + 51/push-ecx + # . . call + e8/call rewind-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +$emit-segments:word-loop: + # 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 +#? # dump word-slice {{{ +#? # . write(2/stderr, "w: ") +#? # . . push args +#? 68/push "w: "/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-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 +#? # }}} +$emit-segments:check-for-end-of-line: + # if (slice-empty?(word-slice)) break + # . 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) break + 3d/compare-eax-and 0/imm32/false + 0f 85/jump-if-!= $emit-segments:next-line/disp32 +$emit-segments:check-for-comment: + # if (slice-starts-with?(word-slice, "#")) break + # . start/esi = word-slice->start + 8b/copy 0/mod/indirect 2/rm32/edx . . . 6/r32/esi . . # copy *edx 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 == '#') break + 3d/compare-eax-and 0x23/imm32/hash + 0f 84/jump-if-= $emit-segments:next-line/disp32 +$emit-segments:check-for-label: + # if is-label?(word-slice) break + # . eax = is-label?(word-slice) + # . . push args + 52/push-edx + # . . call + e8/call is-label?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . if (eax != false) break + 3d/compare-eax-and 0/imm32/false + 0f 85/jump-if-!= $emit-segments:line-loop/disp32 +$emit-segments:check-for-segment-header: + # if (slice-equal?(word-slice, "==")) break + # . 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 != false) break + 3d/compare-eax-and 0/imm32/false + 0f 85/jump-if-!= $emit-segments:line-loop/disp32 +$emit-segments:2-character: + # if (size(word-slice) != 2) goto next check + # . eax = size(word-slice) + 8b/copy 1/mod/*+disp8 2/rm32/edx . . . 0/r32/eax 4/disp8 . # copy *(edx+4) to eax + 2b/subtract 0/mod/indirect 2/rm32/edx . . . 0/r32/eax . . # subtract *edx from eax + # . if (eax != 2) goto next check + 3d/compare-eax-and 2/imm32 + 75/jump-if-!= $emit-segments:check-metadata/disp8 + # write-slice-buffered(out, word-slice) + # . . push args + 52/push-edx + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + # . . call + e8/call write-slice-buffered/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # write-buffered(out, " ") + # . . push args + 68/push Space/imm32 + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + # . . call + e8/call write-buffered/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # continue + e9/jump $emit-segments:word-loop/disp32 +$emit-segments:check-metadata: + # - if we get here, 'word-slice' must be a label to be looked up + # datum = next-token-from-slice(word-slice->start, word-slice->end, "/") + # . . push args + 68/push emit-segments:datum/imm32 + 68/push 0x2f/imm32/slash + ff 6/subop/push 1/mod/*+disp8 2/rm32/edx . . . . 4/disp8 . # push *(edx+4) + ff 6/subop/push 0/mod/indirect 2/rm32/edx . . . . . . # push *edx + # . . call + e8/call next-token-from-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # add to esp +#? # dump datum {{{ +#? # . write(2/stderr, "datum: ") +#? # . . push args +#? 68/push "datum: "/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-slice-buffered(Stderr, datum) +#? # . . push args +#? 68/push emit-segments:datum/imm32 +#? 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 +#? # }}} + # info/esi = get-slice(labels, datum, row-size=24, "label table") + # . eax = get-slice(labels, datum, row-size=24, "label table") + # . . push args + 68/push "label table"/imm32 + 68/push 0x18/imm32/row-size + 68/push emit-segments:datum/imm32 + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x10/disp8 . # push *(ebp+16) + # . . call + e8/call get-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # add to esp + # . esi = eax + 89/copy 3/mod/direct 6/rm32/esi . . . 0/r32/eax . . # copy eax to esi +$emit-segments:check-imm8: + # if (has-metadata?(word-slice, "imm8")) abort + # . eax = has-metadata?(edx, "imm8") + # . . push args + 68/push "imm8"/imm32 + 52/push-edx + # . . call + e8/call has-metadata?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . if (eax != false) abort + 3d/compare-eax-and 0/imm32/false + 0f 85/jump-if-!= $emit-segments:imm8-abort/disp32 +$emit-segments:check-imm32: + # if (!has-metadata?(word-slice, "imm32")) goto next check + # . eax = has-metadata?(edx, "imm32") + # . . push args + 68/push "imm32"/imm32 + 52/push-edx + # . . call + e8/call has-metadata?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . if (eax == false) goto next check + 3d/compare-eax-and 0/imm32/false + 74/jump-if-= $emit-segments:check-disp8/disp8 +#? # dump info->address {{{ +#? # . write(2/stderr, "info->address: ") +#? # . . push args +#? 68/push "info->address: "/imm32 +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # . write-int32-hex-buffered(Stderr, info->address) +#? # . . push args +#? ff 6/subop/push 1/mod/*+disp8 6/rm32/esi . . . . 0xc/disp8 . # push *(esi+12) +#? 68/push Stderr/imm32 +#? # . . call +#? e8/call write-int32-hex-buffered/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # . flush(Stderr) +#? # . . push args +#? 68/push Stderr/imm32 +#? # . . call +#? e8/call flush/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +#? # . write(2/stderr, "$\n") +#? # . . push args +#? 68/push "$\n"/imm32 +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # }}} +$emit-segments:emit-imm32: + # emit-hex(out, info->address, 4) + # . . push args + 68/push 4/imm32 + ff 6/subop/push 1/mod/*+disp8 6/rm32/esi . . . . 0xc/disp8 . # push *(esi+12) + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + # . . call + e8/call emit-hex/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # continue + e9/jump $emit-segments:word-loop/disp32 +$emit-segments:check-disp8: + # if (!has-metadata?(word-slice, "disp8")) goto next check + # . eax = has-metadata?(edx, "disp8") + # . . push args + 68/push "disp8"/imm32 + 52/push-edx + # . . call + e8/call has-metadata?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . if (eax == false) goto next check + 3d/compare-eax-and 0/imm32/false + 74/jump-if-= $emit-segments:check-disp32/disp8 +$emit-segments:emit-disp8: + # emit-hex(out, info->offset - offset-of-next-instruction, 1) + # . . push args + 68/push 1/imm32 + 8b/copy 1/mod/*+disp8 6/rm32/esi . . . 0/r32/eax 8/disp8 . # copy *(esi+8) to eax + 29/subtract 3/mod/direct 0/rm32/eax . . . 3/r32/ebx . . # subtract ebx from eax + 50/push-eax + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + # . . call + e8/call emit-hex/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # continue + e9/jump $emit-segments:word-loop/disp32 +$emit-segments:check-disp32: + # if (!has-metadata?(word-slice, "disp32")) abort + # . eax = has-metadata?(edx, "disp32") + # . . push args + 68/push "disp32"/imm32 + 52/push-edx + # . . call + e8/call has-metadata?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . if (eax == false) abort + 3d/compare-eax-and 0/imm32/false + 0f 84/jump-if-= $emit-segments:abort/disp32 +$emit-segments:emit-disp32: + # var value/eax = info->address + 8b/copy 1/mod/*+disp8 6/rm32/esi . . . 0/r32/eax 0xc/disp8 . # copy *(esi+12) to eax + # if (is-far-jump-or-call?) value = info->offset - offset-of-next-instruction + 81 7/subop/compare 3/mod/direct 7/rm32/edi . . . . . 0/imm32/false # compare edi + 74/jump-if-= $emit-segments:really-emit-disp32/disp8 + 8b/copy 1/mod/*+disp8 6/rm32/esi . . . 0/r32/eax 8/disp8 . # copy *(esi+8) to eax + 29/subtract 3/mod/direct 0/rm32/eax . . . 3/r32/ebx . . # subtract ebx from eax +$emit-segments:really-emit-disp32: + # emit-hex(out, value, 4) + # . . push args + 68/push 4/imm32 + 50/push-eax + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + # . . call + e8/call emit-hex/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # continue + e9/jump $emit-segments:word-loop/disp32 +$emit-segments:next-line: + # write-buffered(out, "\n") + # . . push args + 68/push Newline/imm32 + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + # . . call + e8/call write-buffered/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # loop + e9/jump $emit-segments:line-loop/disp32 +$emit-segments:end: + # . reclaim locals + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x214/imm32 # add to esp + # . restore registers + 5f/pop-to-edi + 5e/pop-to-esi + 5b/pop-to-ebx + 5a/pop-to-edx + 59/pop-to-ecx + 58/pop-to-eax + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +$emit-segments:global-variable-abort: + # . _write(2/stderr, error) + # . . push args + 68/push "emit-segments: must refer to global variables with /disp32 or /imm32"/imm32 + 68/push 2/imm32/stderr + # . . call + e8/call _write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . syscall(exit, 1) + bb/copy-to-ebx 1/imm32 + e8/call syscall_exit/disp32 + # never gets here + +$emit-segments:imm8-abort: + # . _write(2/stderr, error) + # . . push args + 68/push "emit-segments: cannot refer to code labels with /imm8"/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 + # . syscall(exit, 1) + bb/copy-to-ebx 1/imm32 + e8/call syscall_exit/disp32 + # never gets here + +$emit-segments:abort: + # print(stderr, "missing metadata in " word-slice) + # . _write(2/stderr, "missing metadata in word ") + # . . push args + 68/push "emit-segments: missing metadata in "/imm32 + 68/push 2/imm32/stderr + # . . call + e8/call _write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write-slice-buffered(Stderr, word-slice) + # . . push args + 52/push-edx + 68/push Stderr/imm32 + # . . call + e8/call write-slice-buffered/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . flush(Stderr) + # . . push args + 68/push Stderr/imm32 + # . . call + e8/call flush/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . syscall(exit, 1) + bb/copy-to-ebx 1/imm32 + e8/call syscall_exit/disp32 + # never gets here + +test-emit-segments-non-far-control-flow: + # labels turn into absolute addresses if opcodes are not far jumps or calls + # + # input: + # in: + # == code 0x1000 + # ab cd ef gh + # ij x/disp32 + # == data 0x2000 + # 00 + # x: + # 34 + # labels: + # - 'x': {'data', 1, 0x207a} + # + # output: + # ab cd ef gh + # ij 7a 20 00 00 + # 00 + # 34 + # + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . clear-stream(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream(_test-output-stream) + # . . push args + 68/push _test-output-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream($_test-output-buffered-file->buffer) + # . . push args + 68/push $_test-output-buffered-file->buffer/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . var labels/edx: (stream byte 8*24) + 81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0xc0/imm32 # subtract from esp + 68/push 0xc0/imm32/size + 68/push 0/imm32/read + 68/push 0/imm32/write + 89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx + # . var h/ebx: (handle array byte) + 68/push 0/imm32 + 68/push 0/imm32 + 89/copy 3/mod/direct 3/rm32/ebx . . . 4/r32/esp . . # copy esp to ebx + # initialize input + # . write(_test-input-stream, "== code 0x1000\n") + # . . push args + 68/push "== code 0x1000\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "ab cd ef gh\n") + # . . push args + 68/push "ab cd ef gh\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "ij x/disp32\n") + # . . push args + 68/push "ij x/disp32\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "== data 0x2000\n") + # . . push args + 68/push "== data 0x2000\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "00\n") + # . . push args + 68/push "00\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "x:\n") + # . . push args + 68/push "x:\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "34\n") + # . . push args + 68/push "34\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . stream-add6(labels, "x", "data", 1, 0x207a) + 68/push 0x207a/imm32/label-address + 68/push 1/imm32/segment-offset + # . . push "data" + 53/push-ebx + 68/push "data"/imm32 + 68/push Heap/imm32 + e8/call copy-array/disp32 + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4) + ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx + # . . push "l1" + 53/push-ebx + 68/push "x"/imm32 + 68/push Heap/imm32 + e8/call copy-array/disp32 + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4) + ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx + # . . push labels + 52/push-edx + # . . call + e8/call stream-add6/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x1c/imm32 # add to esp + # component under test + # . emit-segments(_test-input-stream, _test-output-buffered-file, labels) + # . . push args + 52/push-edx + 68/push _test-output-buffered-file/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call emit-segments/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # checks + # . flush(_test-output-buffered-file) + # . . push args + 68/push _test-output-buffered-file/imm32 + # . . call + e8/call flush/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +#? # dump output {{{ +#? # . write(2/stderr, "result: ^") +#? # . . push args +#? 68/push "result: ^"/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, _test-output-stream) +#? # . . push args +#? 68/push _test-output-stream/imm32 +#? 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(_test-output-stream) +#? # . . push args +#? 68/push _test-output-stream/imm32 +#? # . . call +#? e8/call rewind-stream/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +#? # }}} + # . check-next-stream-line-equal(_test-output-stream, "ab cd ef gh ", msg) + # . . push args + 68/push "F - test-emit-segments-global-variable/0"/imm32 + 68/push "ab cd ef gh "/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, "ij 7a 20 00 00 ", msg) + # . . push args + 68/push "F - test-emit-segments-global-variable/1"/imm32 + 68/push "ij 7a 20 00 00 "/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, "00 ", msg) + # . . push args + 68/push "F - test-emit-segments-global-variable/2"/imm32 + 68/push "00 "/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, "34 ", msg) + # . . push args + 68/push "F - test-emit-segments-global-variable/3"/imm32 + 68/push "34 "/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 + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-emit-segments-code-label: + # labels turn into PC-relative addresses if opcodes are far jumps or calls + # + # input: + # in: + # == code 0x1000 + # ab cd + # l1: + # ef gh + # e8 l1/disp32 + # labels: + # - 'l1': {'code', 2, 0x1056} + # + # output: + # ab cd + # ef gh + # e8 f9 ff ff ff # -7 + # + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . clear-stream(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream(_test-output-stream) + # . . push args + 68/push _test-output-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream($_test-output-buffered-file->buffer) + # . . push args + 68/push $_test-output-buffered-file->buffer/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . var labels/edx: (stream byte 8*24) + 81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0xc0/imm32 # subtract from esp + 68/push 0xc0/imm32/size + 68/push 0/imm32/read + 68/push 0/imm32/write + 89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx + # . var h/ebx: (handle array byte) + 68/push 0/imm32 + 68/push 0/imm32 + 89/copy 3/mod/direct 3/rm32/ebx . . . 4/r32/esp . . # copy esp to ebx + # initialize input + # . write(_test-input-stream, "== code 0x1000\n") + # . . push args + 68/push "== code 0x1000\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "ab cd\n") + # . . push args + 68/push "ab cd\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "l1:\n") + # . . push args + 68/push "l1:\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, " ef gh\n") + # . . push args + 68/push " ef gh\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, " e8 l1/disp32\n") + # . . push args + 68/push " e8 l1/disp32\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . stream-add6(labels, "l1", "code", 2, 0x1056) + 68/push 0x1056/imm32/label-address + 68/push 2/imm32/segment-offset + # . . push "data" + 53/push-ebx + 68/push "code"/imm32 + 68/push Heap/imm32 + e8/call copy-array/disp32 + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4) + ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx + # . . push "l1" + 53/push-ebx + 68/push "l1"/imm32 + 68/push Heap/imm32 + e8/call copy-array/disp32 + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4) + ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx + # . . push labels + 52/push-edx + # . . call + e8/call stream-add6/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x1c/imm32 # add to esp + # component under test + # . emit-segments(_test-input-stream, _test-output-buffered-file, labels) + # . . push args + 52/push-edx + 68/push _test-output-buffered-file/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call emit-segments/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # checks + # . flush(_test-output-buffered-file) + # . . push args + 68/push _test-output-buffered-file/imm32 + # . . call + e8/call flush/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +#? # dump output {{{ +#? # . write(2/stderr, "result: ^") +#? # . . push args +#? 68/push "result: ^"/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, _test-output-stream) +#? # . . push args +#? 68/push _test-output-stream/imm32 +#? 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(_test-output-stream) +#? # . . push args +#? 68/push _test-output-stream/imm32 +#? # . . call +#? e8/call rewind-stream/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +#? # }}} + # . check-next-stream-line-equal(_test-output-stream, "ab cd ", msg) + # . . push args + 68/push "F - test-emit-segments-code-label/0"/imm32 + 68/push "ab cd "/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, "ef gh ", msg) + # . . push args + 68/push "F - test-emit-segments-code-label/1"/imm32 + 68/push "ef gh "/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, "e8 f9 ff ff ff ", msg) + # . . push args + 68/push "F - test-emit-segments-code-label/2"/imm32 + 68/push "e8 f9 ff ff ff "/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 + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-emit-segments-code-label-absolute: + # labels can also convert to absolute addresses + # + # input: + # in: + # == code 0x1000 + # ab cd + # l1: + # ef gh + # ij l1/imm32 + # labels: + # - 'l1': {'code', 2, 0x1056} + # + # output: + # ab cd + # ef gh + # ij 56 10 00 00 + # + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . clear-stream(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream(_test-output-stream) + # . . push args + 68/push _test-output-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream($_test-output-buffered-file->buffer) + # . . push args + 68/push $_test-output-buffered-file->buffer/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . var labels/edx: (stream byte 8*24) + 81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0xc0/imm32 # subtract from esp + 68/push 0xc0/imm32/size + 68/push 0/imm32/read + 68/push 0/imm32/write + 89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx + # . var h/ebx: (handle array byte) + 68/push 0/imm32 + 68/push 0/imm32 + 89/copy 3/mod/direct 3/rm32/ebx . . . 4/r32/esp . . # copy esp to ebx + # initialize input + # . write(_test-input-stream, "== code 0x1000\n") + # . . push args + 68/push "== code 0x1000\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "ab cd\n") + # . . push args + 68/push "ab cd\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, "l1:\n") + # . . push args + 68/push "l1:\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, " ef gh\n") + # . . push args + 68/push " ef gh\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . write(_test-input-stream, " ij l1/imm32\n") + # . . push args + 68/push " ij l1/imm32\n"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . stream-add6(labels, "l1", "code", 2, 0x1056) + 68/push 0x1056/imm32/label-address + 68/push 2/imm32/segment-offset + # . . push "data" + 53/push-ebx + 68/push "code"/imm32 + 68/push Heap/imm32 + e8/call copy-array/disp32 + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4) + ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx + # . . push "l1" + 53/push-ebx + 68/push "l1"/imm32 + 68/push Heap/imm32 + e8/call copy-array/disp32 + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4) + ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx + # . . push labels + 52/push-edx + # . . call + e8/call stream-add6/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x1c/imm32 # add to esp + # component under test + # . emit-segments(_test-input-stream, _test-output-buffered-file, labels) + # . . push args + 52/push-edx + 68/push _test-output-buffered-file/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call emit-segments/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # checks + # . flush(_test-output-buffered-file) + # . . push args + 68/push _test-output-buffered-file/imm32 + # . . call + e8/call flush/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +#? # dump output {{{ +#? # . write(2/stderr, "result: ^") +#? # . . push args +#? 68/push "result: ^"/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, _test-output-stream) +#? # . . push args +#? 68/push _test-output-stream/imm32 +#? 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(_test-output-stream) +#? # . . push args +#? 68/push _test-output-stream/imm32 +#? # . . call +#? e8/call rewind-stream/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +#? # }}} + # . check-next-stream-line-equal(_test-output-stream, "ab cd ", msg) + # . . push args + 68/push "F - test-emit-segments-code-label-absolute/0"/imm32 + 68/push "ab cd "/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, "ef gh ", msg) + # . . push args + 68/push "F - test-emit-segments-code-label-absolute/1"/imm32 + 68/push "ef gh "/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, "ij f9 ff ff ff ", msg) + # . . push args + 68/push "F - test-emit-segments-code-label-absolute/2"/imm32 + 68/push "ij 56 10 00 00 "/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 + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +# reads line to make some checks +# don't assume the read state of line after calling this function +is-far-jump-or-call?: # line: (addr stream byte) -> result/edi: boolean + # . 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 + # ecx = line + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 8/disp8 . # copy *(ebp+8) to ecx + # var word-slice/edx: slice + 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 + # var datum-slice/ebx: slice + 68/push 0/imm32/end + 68/push 0/imm32/start + 89/copy 3/mod/direct 3/rm32/ebx . . . 4/r32/esp . . # copy esp to ebx + # result = false + bf/copy-to-edi 0/imm32/false +$is-far-jump-or-call?:check-first-word: + # 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 + # if (slice-empty?(word-slice)) return false + # . 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) return + 3d/compare-eax-and 0/imm32/false + 0f 85/jump-if-!= $is-far-jump-or-call?:end/disp32 + # datum = next-token-from-slice(word-slice->start, word-slice->end, "/") + # . . push args + 53/push-ebx + 68/push 0x2f/imm32/slash + ff 6/subop/push 1/mod/*+disp8 2/rm32/edx . . . . 4/disp8 . # push *(edx+4) + ff 6/subop/push 0/mod/indirect 2/rm32/edx . . . . . . # push *edx + # . . call + e8/call next-token-from-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # add to esp + # if (datum-slice == "e8") return true + # . eax = slice-equal?(datum-slice, "e8") + # . . push args + 68/push "e8"/imm32 + 53/push-ebx + # . . 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 != false) return true + 3d/compare-eax-and 0/imm32/false + 75/jump-if-!= $is-far-jump-or-call?:return-true/disp8 + # if (datum-slice == "e9") return true + # . eax = slice-equal?(datum-slice, "e9") + # . . push args + 68/push "e9"/imm32 + 53/push-ebx + # . . 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 != false) return true + 3d/compare-eax-and 0/imm32/false + 75/jump-if-!= $is-far-jump-or-call?:return-true/disp8 + # if (datum-slice != "0f") return false + # . eax = slice-equal?(datum-slice, "0f") + # . . push args + 68/push "0f"/imm32 + 53/push-ebx + # . . 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 == false) return + 3d/compare-eax-and 0/imm32/false + 74/jump-if-= $is-far-jump-or-call?:end/disp8 +$is-far-jump-or-call?:check-second-word: + # 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 + # if (slice-empty?(word-slice)) return false + # . 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) return + 3d/compare-eax-and 0/imm32/false + 75/jump-if-!= $is-far-jump-or-call?:end/disp8 + # if datum of word-slice does not start with "8", return false + # . start/eax = word-slice->start + 8b/copy 0/mod/indirect 2/rm32/edx . . . 0/r32/eax . . # copy *edx to eax + # . c/eax = *start + 8a/copy-byte 0/mod/indirect 0/rm32/eax . . . 0/r32/AL . . # copy byte at *eax to AL + 81 4/subop/and 3/mod/direct 0/rm32/eax . . . . . 0xff/imm32 # bitwise and of eax + # . if (eax != '8') return + 3d/compare-eax-and 0x38/imm32/8 + 75/jump-if-!= $is-far-jump-or-call?:end/disp8 + # otherwise return true +$is-far-jump-or-call?:return-true: + bf/copy-to-edi 1/imm32/true +$is-far-jump-or-call?:end: + # . reclaim locals + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # add to esp + # . restore registers + 5b/pop-to-ebx + 5a/pop-to-edx + 59/pop-to-ecx + 58/pop-to-eax + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +emit-headers: # out: (addr buffered-file), segments: (addr stream {(handle array byte), segment-info}), labels: (addr stream {(handle array byte), label-info}) + # pseudocode: + # emit-elf-header(out, segments, labels) + # var curr-segment-row: (addr handle array byte) = segments->data + # max = &segments->data[segments->write] + # while true + # if (curr-segment >= max) break + # emit-elf-program-header-entry(out, curr-segment-row) + # curr-segment-row += 20 # size of a row + # + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # . save registers + 50/push-eax + 51/push-ecx + # emit-elf-header(out, segments, labels) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x10/disp8 . # push *(ebp+16) + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + # . . call + e8/call emit-elf-header/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # eax = segments + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0xc/disp8 . # copy *(ebp+12) to eax + # ecx = segments->write + 8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx + # curr-segment/eax = segments->data + 8d/copy-address 1/mod/*+disp8 0/rm32/eax . . . 0/r32/eax 0xc/disp8 . # copy eax+12 to eax + # max/ecx = &segments->data[segments->write] + 01/add 3/mod/direct 1/rm32/ecx . . . 0/r32/eax . . # add eax to ecx +$emit-headers:loop: + # if (curr-segment >= max) break + 39/compare 3/mod/direct 0/rm32/eax . . . 1/r32/ecx . . # compare eax with ecx + 0f 83/jump-if-addr>= $emit-headers:end/disp32 +#? # dump curr-segment->name {{{ +#? # . write(2/stderr, "about to emit ph entry: segment->name: ") +#? # . . push args +#? 68/push "about to emit ph entry: segment->name: "/imm32 +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # . clear-stream($Stderr->buffer) +#? # . . push args +#? 68/push $Stderr->buffer/imm32 +#? # . . call +#? e8/call clear-stream/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +#? # . write-int32-hex-buffered(Stderr, &curr-segment) +#? # . . push args +#? 50/push-eax +#? 68/push Stderr/imm32 +#? # . . call +#? e8/call write-int32-hex-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, " -> ") +#? # . . push args +#? 68/push " -> "/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-int32-hex-buffered(Stderr, curr-segment->name) +#? # . . push args +#? ff 6/subop/push 0/mod/indirect 0/rm32/eax . . . . . . # push *eax +#? 68/push Stderr/imm32 +#? # . . call +#? e8/call write-int32-hex-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 Newline/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(2/stderr, "emit-segment-header\n") {{{ +#? # . . push args +#? 68/push "emit-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 +#? # }}} + # emit-elf-program-header-entry(out, curr-segment) + # . . push args + 50/push-eax + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + # . . call + e8/call emit-elf-program-header-entry/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # curr-segment += 20 # size of a row + 81 0/subop/add 3/mod/direct 0/rm32/eax . . . . . 0x14/imm32 # add to eax + e9/jump $emit-headers:loop/disp32 +$emit-headers:end: + # . restore registers + 59/pop-to-ecx + 58/pop-to-eax + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +emit-elf-header: # out: (addr buffered-file), segments: (addr stream {(handle array byte), segment-info}), labels: (addr stream {(handle array byte), label-info}) + # pseudocode + # *$Elf_e_entry = get(labels, "Entry")->address + # *$Elf_e_phnum = segments->write / 20 # size of a row + # emit-hex-array(out, Elf_header) + # write-buffered(out, "\n") + # + # . 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 # just because we need to call idiv + # *$Elf_e_entry = get(labels, "Entry")->address + # . eax = labels + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0x10/disp8 . # copy *(ebp+16) to eax + # . label-info/eax = get(labels, "Entry", row-size=24, "label table") + # . . push args + 68/push "label table"/imm32 + 68/push 0x18/imm32/row-size + 68/push "Entry"/imm32 + 50/push-eax + # . . call + e8/call get/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # add to esp + # . eax = label-info->address + 8b/copy 1/mod/*+disp8 0/rm32/eax . . . 0/r32/eax 0xc/disp8 . # copy *(eax+12) to eax + # . *$Elf_e_entry = eax + 89/copy 0/mod/indirect 5/rm32/.disp32 . . 0/r32/eax $Elf_e_entry/disp32 # copy eax to *$Elf_e_entry + # *$Elf_e_phnum = segments->write / 20 + # . eax = segments + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0xc/disp8 . # copy *(ebp+12) to eax + # . len/eax = segments->write + 8b/copy 0/mod/indirect 0/rm32/eax . . . 0/r32/eax . . # copy *eax to eax + # . eax = len / 20 (clobbering ecx and edx) + b9/copy-to-ecx 0x14/imm32 + 31/xor 3/mod/direct 2/rm32/edx . . . 2/r32/edx . . # clear edx + f7 7/subop/idiv 3/mod/direct 1/rm32/ecx . . . . . . # divide edx:eax by ecx, storing quotient in eax and remainder in edx + # . *$Elf_e_phnum = eax + 89/copy 0/mod/indirect 5/rm32/.disp32 . . 0/r32/eax $Elf_e_phnum/disp32 # copy eax to *$Elf_e_phnum + # emit-hex-array(out, Elf_header) + # . . push args + 68/push Elf_header/imm32 + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + # . . call + e8/call emit-hex-array/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # write-buffered(out, "\n") + # . . push args + 68/push Newline/imm32 + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + # . . call + e8/call write-buffered/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +$emit-elf-header:end: + # . restore registers + 5a/pop-to-edx + 59/pop-to-ecx + 58/pop-to-eax + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +# segment-info: {address, file-offset, size} (12 bytes) +# segments: (addr stream {(handle array byte), segment-info}) (20 bytes per row) +emit-elf-program-header-entry: # out: (addr buffered-file), curr-segment: (addr {(handle array byte), segment-info}) + # pseudocode: + # *$Elf_p_offset = curr-segment->file-offset + # *$Elf_p_vaddr = curr-segment->address + # *$Elf_p_paddr = curr-segment->address + # *$Elf_p_filesz = curr-segment->size + # *$Elf_p_memsz = curr-segment->size + # if curr-segment->name == "code" + # *$Elf_p_flags = 5 # r-x + # else + # *$Elf_p_flags = 6 # rw- + # emit-hex-array(out, Elf_program_header_entry) + # write-buffered(out, "\n") + # + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # . save registers + 50/push-eax + 56/push-esi + # esi = curr-segment + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 0xc/disp8 . # copy *(ebp+12) to esi + # *$Elf_p_offset = curr-segment->file-offset + # . eax = curr-segment->file-offset + 8b/copy 1/mod/*+disp8 6/rm32/esi . . . 0/r32/eax 0xc/disp8 . # copy *(esi+12) to eax + # . *$Elf_p_offset = eax + 89/copy 0/mod/indirect 5/rm32/.disp32 . . 0/r32/eax $Elf_p_offset/disp32 # copy eax to *$Elf_p_offset + # *$Elf_p_vaddr = curr-segment->address + # . eax = curr-segment->address + 8b/copy 1/mod/*+disp8 6/rm32/esi . . . 0/r32/eax 8/disp8 . # copy *(esi+8) to eax + # . *$Elf_p_vaddr = eax + 89/copy 0/mod/indirect 5/rm32/.disp32 . . 0/r32/eax $Elf_p_vaddr/disp32 # copy eax to *$Elf_p_vaddr + # *$Elf_p_paddr = curr-segment->address + 89/copy 0/mod/indirect 5/rm32/.disp32 . . 0/r32/eax $Elf_p_paddr/disp32 # copy eax to *$Elf_p_paddr + # *$Elf_p_filesz = curr-segment->size + # . eax = curr-segment->size + 8b/copy 1/mod/*+disp8 6/rm32/esi . . . 0/r32/eax 0x10/disp8 . # copy *(esi+16) to eax + # . *$Elf_p_filesz = eax + 89/copy 0/mod/indirect 5/rm32/.disp32 . . 0/r32/eax $Elf_p_filesz/disp32 # copy eax to *$Elf_p_filesz + # *$Elf_p_memsz = curr-segment->size + 89/copy 0/mod/indirect 5/rm32/.disp32 . . 0/r32/eax $Elf_p_memsz/disp32 # copy eax to *$Elf_p_memsz + # if (!string-equal?(name, "code") goto next check + # . var name/eax: (addr array byte) = lookup(curr-segment->name) + # . . push args + ff 6/subop/push 1/mod/*+disp8 6/rm32/esi . . . . 4/disp8 . # push *(esi+4) + ff 6/subop/push 0/mod/indirect 6/rm32/esi . . . . . . # push *esi + # . . call + e8/call lookup/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . eax = string-equal?(name, "code") + # . . push args + 68/push "code"/imm32 + 50/push-eax + # . . call + e8/call string-equal?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . if (eax == false) goto next check + 3d/compare-eax-and 0/imm32/false + 74/jump-if-= $emit-elf-program-header-entry:data/disp8 + # *$Elf_p_flags = r-x + c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . $Elf_p_flags/disp32 5/imm32 # copy to *$Elf_p_flags + eb/jump $emit-elf-program-header-entry:really-emit/disp8 +$emit-elf-program-header-entry:data: + # otherwise *$Elf_p_flags = rw- + c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . $Elf_p_flags/disp32 6/imm32 # copy to *$Elf_p_flags +$emit-elf-program-header-entry:really-emit: + # emit-hex-array(out, Elf_program_header_entry) + # . . push args + 68/push Elf_program_header_entry/imm32 + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + # . . call + e8/call emit-hex-array/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # write-buffered(out, "\n") + # . . push args + 68/push Newline/imm32 + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + # . . call + e8/call write-buffered/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +$emit-elf-program-header-entry:end: + # . restore registers + 5e/pop-to-esi + 58/pop-to-eax + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +# - some helpers for tests + +stream-add5: # in: (addr stream byte), key: handle, val1: addr, val2: addr, val3: addr + # . 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 + 56/push-esi + # esi = in + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 8/disp8 . # copy *(ebp+8) to esi + # curr/eax = &in->data[in->write] + # . eax = in->write + 8b/copy 0/mod/indirect 6/rm32/esi . . . 0/r32/eax . . # copy *esi to eax + # . eax = esi+eax+12 + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 0/index/eax . 0/r32/eax 0xc/disp8 . # copy esi+eax+12 to eax + # max/edx = &in->data[in->size] + # . edx = in->size + 8b/copy 1/mod/*+disp8 6/rm32/esi . . . 2/r32/edx 8/disp8 . # copy *(esi+8) to edx + # . edx = esi+edx+12 + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 2/index/edx . 2/r32/edx 0xc/disp8 . # copy esi+edx+12 to edx + # if (curr >= max) abort + 39/compare 3/mod/direct 0/rm32/eax . . . 2/r32/edx . . # compare eax with edx + 73/jump-if-addr>= $stream-add5:abort/disp8 + # *curr = key->alloc-id + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . 1/r32/ecx 0xc/disp8 . # copy *(ebp+12) to ecx + 89/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy ecx to *eax + # curr += 4 + 05/add-to-eax 4/imm32 + # if (curr >= max) abort + 39/compare 3/mod/direct 0/rm32/eax . . . 2/r32/edx . . # compare eax with edx + 73/jump-if-addr>= $stream-add5:abort/disp8 + # *curr = key->payload + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . 1/r32/ecx 0x10/disp8 . # copy *(ebp+16) to ecx + 89/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy ecx to *eax + # curr += 4 + 05/add-to-eax 4/imm32 + # if (curr >= max) abort + 39/compare 3/mod/direct 0/rm32/eax . . . 2/r32/edx . . # compare eax with edx + 73/jump-if-addr>= $stream-add5:abort/disp8 + # *curr = val1 + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . 1/r32/ecx 0x14/disp8 . # copy *(ebp+20) to ecx + 89/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy ecx to *eax + # curr += 4 + 05/add-to-eax 4/imm32 + # if (curr >= max) abort + 39/compare 3/mod/direct 0/rm32/eax . . . 2/r32/edx . . # compare eax with edx + 73/jump-if-addr>= $stream-add5:abort/disp8 + # *curr = val2 + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . 1/r32/ecx 0x18/disp8 . # copy *(ebp+24) to ecx + 89/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy ecx to *eax + # curr += 4 + 05/add-to-eax 4/imm32 + # if (curr >= max) abort + 39/compare 3/mod/direct 0/rm32/eax . . . 2/r32/edx . . # compare eax with edx + 73/jump-if-addr>= $stream-add5:abort/disp8 + # *curr = val3 + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . 1/r32/ecx 0x1c/disp8 . # copy *(ebp+28) to ecx + 89/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy ecx to *eax + # in->write += 20 + 81 0/subop/add 0/mod/indirect 6/rm32/esi . . . . . 0x14/imm32 # add to *esi +$stream-add5:end: + # . restore registers + 5e/pop-to-esi + 5a/pop-to-edx + 59/pop-to-ecx + 58/pop-to-eax + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +$stream-add5:abort: + # . _write(2/stderr, error) + # . . push args + 68/push "overflow in stream-add5\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 + # . syscall(exit, 1) + bb/copy-to-ebx 1/imm32 + e8/call syscall_exit/disp32 + # never gets here + +stream-add6: # in: (addr stream byte), key: handle, val1: addr, val2: addr, val3: addr, val4: addr + # . 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 + 56/push-esi + # esi = in + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 8/disp8 . # copy *(ebp+8) to esi + # curr/eax = &in->data[in->write] + # . eax = in->write + 8b/copy 0/mod/indirect 6/rm32/esi . . . 0/r32/eax . . # copy *esi to eax + # . eax = esi+eax+12 + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 0/index/eax . 0/r32/eax 0xc/disp8 . # copy esi+eax+12 to eax + # max/edx = &in->data[in->size] + # . edx = in->size + 8b/copy 1/mod/*+disp8 6/rm32/esi . . . 2/r32/edx 8/disp8 . # copy *(esi+8) to edx + # . edx = esi+edx+12 + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 2/index/edx . 2/r32/edx 0xc/disp8 . # copy esi+edx+12 to edx + # if (curr >= max) abort + 39/compare 3/mod/direct 0/rm32/eax . . . 2/r32/edx . . # compare eax with edx + 73/jump-if-addr>= $stream-add6:abort/disp8 + # *curr = key->alloc-id + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . 1/r32/ecx 0xc/disp8 . # copy *(ebp+12) to ecx + 89/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy ecx to *eax + # curr += 4 + 05/add-to-eax 4/imm32 + # if (curr >= max) abort + 39/compare 3/mod/direct 0/rm32/eax . . . 2/r32/edx . . # compare eax with edx + 73/jump-if-addr>= $stream-add6:abort/disp8 + # *curr = key->payload + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . 1/r32/ecx 0x10/disp8 . # copy *(ebp+16) to ecx + 89/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy ecx to *eax + # curr += 4 + 05/add-to-eax 4/imm32 + # if (curr >= max) abort + 39/compare 3/mod/direct 0/rm32/eax . . . 2/r32/edx . . # compare eax with edx + 73/jump-if-addr>= $stream-add6:abort/disp8 + # *curr = val1 + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . 1/r32/ecx 0x14/disp8 . # copy *(ebp+20) to ecx + 89/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy ecx to *eax + # curr += 4 + 05/add-to-eax 4/imm32 + # if (curr >= max) abort + 39/compare 3/mod/direct 0/rm32/eax . . . 2/r32/edx . . # compare eax with edx + 73/jump-if-addr>= $stream-add6:abort/disp8 + # *curr = val2 + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . 1/r32/ecx 0x18/disp8 . # copy *(ebp+24) to ecx + 89/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy ecx to *eax + # curr += 4 + 05/add-to-eax 4/imm32 + # if (curr >= max) abort + 39/compare 3/mod/direct 0/rm32/eax . . . 2/r32/edx . . # compare eax with edx + 73/jump-if-addr>= $stream-add6:abort/disp8 +$aa-write-segment-offset: + # *curr = val3 + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . 1/r32/ecx 0x1c/disp8 . # copy *(ebp+28) to ecx + 89/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy ecx to *eax + # curr += 4 + 05/add-to-eax 4/imm32 + # if (curr >= max) abort + 39/compare 3/mod/direct 0/rm32/eax . . . 2/r32/edx . . # compare eax with edx + 73/jump-if-addr>= $stream-add6:abort/disp8 + # *curr = val4 + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . 1/r32/ecx 0x20/disp8 . # copy *(ebp+32) to ecx + 89/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy ecx to *eax + # in->write += 24 + 81 0/subop/add 0/mod/indirect 6/rm32/esi . . . . . 0x18/imm32 # add to *esi +$stream-add6:end: + # . restore registers + 5e/pop-to-esi + 5a/pop-to-edx + 59/pop-to-ecx + 58/pop-to-eax + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +$stream-add6:abort: + # . _write(2/stderr, error) + # . . push args + 68/push "overflow in stream-add6\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 + # . syscall(exit, 1) + bb/copy-to-ebx 1/imm32 + e8/call syscall_exit/disp32 + # never gets here + +# some variants of 'trace' that take multiple arguments in different combinations of types: +# n: int +# c: character [4-bytes, will eventually be UTF-8] +# s: (addr array byte) +# l: (addr slice) +# one gotcha: 's5' must not be empty + +trace-sssns: # s1: (addr array byte), s2: (addr array byte), s3: (addr array byte), n4: int, s5: (addr array byte) + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # write(*Trace-stream, s1) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # write(*Trace-stream, s2) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # write(*Trace-stream, s3) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x10/disp8 . # push *(ebp+16) + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # write-int32-hex(*Trace-stream, n4) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x14/disp8 . # push *(ebp+20) + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream + # . . call + e8/call write-int32-hex/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # trace(s5) # implicitly adds a newline and finalizes the trace line + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x18/disp8 . # push *(ebp+24) + # . . call + e8/call trace/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +$trace-sssns:end: + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-trace-sssns: + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . *Trace-stream->write = 0 + 8b/copy 0/mod/indirect 5/rm32/.disp32 . . 0/r32/eax Trace-stream/disp32 # copy *Trace-stream to eax + c7 0/subop/copy 0/mod/direct 0/rm32/eax . . . . . 0/imm32 # clear *eax + # trace-sssns("A" "b" "c " 3 " e") + # . . push args + 68/push " e"/imm32 + 68/push 3/imm32 + 68/push "c "/imm32 + 68/push "b"/imm32 + 68/push "A"/imm32 + # . . call + e8/call trace-sssns/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x14/imm32 # add to esp +#? # dump *Trace-stream {{{ +#? # . write(2/stderr, "^") +#? # . . push args +#? 68/push "^"/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, *Trace-stream) +#? # . . push args +#? ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream +#? 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 +#? # }}} + # check-trace-contains("Abc 0x00000003 e") + # . . push args + 68/push "F - test-trace-sssns"/imm32 + 68/push "Abc 0x00000003 e"/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +trace-slsls: # s1: (addr array byte), l2: (addr slice), s3: (addr array byte), l4: (addr slice), s5: (addr array byte) + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # write(*Trace-stream, s1) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # write-slice(*Trace-stream, l2) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream + # . . call + e8/call write-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # write(*Trace-stream, s3) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x10/disp8 . # push *(ebp+16) + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # write-slice(*Trace-stream, l4) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x14/disp8 . # push *(ebp+20) + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream + # . . call + e8/call write-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # trace(s5) # implicitly adds a newline and finalizes the trace line + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x18/disp8 . # push *(ebp+24) + # . . call + e8/call trace/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +$trace-slsls:end: + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-trace-slsls: + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . *Trace-stream->write = 0 + 8b/copy 0/mod/indirect 5/rm32/.disp32 . . 0/r32/eax Trace-stream/disp32 # copy *Trace-stream to eax + c7 0/subop/copy 0/mod/direct 0/rm32/eax . . . . . 0/imm32 # clear *eax + # (eax..ecx) = "b" + b8/copy-to-eax "b"/imm32 + 8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx + 05/add-to-eax 4/imm32 + # var b/ebx: slice = {eax, ecx} + 51/push-ecx + 50/push-eax + 89/copy 3/mod/direct 3/rm32/ebx . . . 4/r32/esp . . # copy esp to ebx + # (eax..ecx) = "d" + b8/copy-to-eax "d"/imm32 + 8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx + 05/add-to-eax 4/imm32 + # var d/edx: slice = {eax, ecx} + 51/push-ecx + 50/push-eax + 89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx + # trace-slsls("A" b "c" d "e") + # . . push args + 68/push "e"/imm32 + 52/push-edx + 68/push "c"/imm32 + 53/push-ebx + 68/push "A"/imm32 + # . . call + e8/call trace-slsls/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x14/imm32 # add to esp +#? # dump *Trace-stream {{{ +#? # . write(2/stderr, "^") +#? # . . push args +#? 68/push "^"/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, *Trace-stream) +#? # . . push args +#? ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream +#? 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 +#? # }}} + # check-trace-contains("Abcde") + # . . push args + 68/push "F - test-trace-slsls"/imm32 + 68/push "Abcde"/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +trace-slsns: # s1: (addr array byte), l2: (addr slice), s3: (addr array byte), n4: int, s5: (addr array byte) + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # write(*Trace-stream, s1) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # write-slice(*Trace-stream, l2) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream + # . . call + e8/call write-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # write(*Trace-stream, s3) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x10/disp8 . # push *(ebp+16) + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # write-int32-hex(*Trace-stream, n4) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x14/disp8 . # push *(ebp+20) + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream + # . . call + e8/call write-int32-hex/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # trace(s5) # implicitly adds a newline and finalizes the trace line + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x18/disp8 . # push *(ebp+24) + # . . call + e8/call trace/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +$trace-slsns:end: + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-trace-slsns: + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . *Trace-stream->write = 0 + 8b/copy 0/mod/indirect 5/rm32/.disp32 . . 0/r32/eax Trace-stream/disp32 # copy *Trace-stream to eax + c7 0/subop/copy 0/mod/direct 0/rm32/eax . . . . . 0/imm32 # clear *eax + # (eax..ecx) = "b" + b8/copy-to-eax "b"/imm32 + 8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx + 05/add-to-eax 4/imm32 + # var b/ebx: slice = {eax, ecx} + 51/push-ecx + 50/push-eax + 89/copy 3/mod/direct 3/rm32/ebx . . . 4/r32/esp . . # copy esp to ebx + # trace-slsls("A" b "c " 3 " e") + # . . push args + 68/push " e"/imm32 + 68/push 3/imm32 + 68/push "c "/imm32 + 53/push-ebx + 68/push "A"/imm32 + # . . call + e8/call trace-slsns/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x14/imm32 # add to esp +#? # dump *Trace-stream {{{ +#? # . write(2/stderr, "^") +#? # . . push args +#? 68/push "^"/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, *Trace-stream) +#? # . . push args +#? ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream +#? 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 +#? # }}} + # check-trace-contains("Abc 0x00000003 e") + # . . push args + 68/push "F - test-trace-slsls"/imm32 + 68/push "Abc 0x00000003 e"/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +trace-slsss: # s1: (addr array byte), l2: (addr slice), s3: (addr array byte), s4: (addr array byte), s5: (addr array byte) + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # write(*Trace-stream, s1) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # write-slice(*Trace-stream, l2) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream + # . . call + e8/call write-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # write(*Trace-stream, s3) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x10/disp8 . # push *(ebp+16) + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # write(*Trace-stream, s4) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x14/disp8 . # push *(ebp+20) + ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # trace(s5) # implicitly adds a newline and finalizes the trace line + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x18/disp8 . # push *(ebp+24) + # . . call + e8/call trace/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +$trace-slsss:end: + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-trace-slsss: + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . *Trace-stream->write = 0 + 8b/copy 0/mod/indirect 5/rm32/.disp32 . . 0/r32/eax Trace-stream/disp32 # copy *Trace-stream to eax + c7 0/subop/copy 0/mod/direct 0/rm32/eax . . . . . 0/imm32 # clear *eax + # (eax..ecx) = "b" + b8/copy-to-eax "b"/imm32 + 8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx + 05/add-to-eax 4/imm32 + # var b/ebx: slice = {eax, ecx} + 51/push-ecx + 50/push-eax + 89/copy 3/mod/direct 3/rm32/ebx . . . 4/r32/esp . . # copy esp to ebx + # trace-slsss("A" b "c" "d" "e") + # . . push args + 68/push "e"/imm32 + 68/push "d"/imm32 + 68/push "c"/imm32 + 53/push-ebx + 68/push "A"/imm32 + # . . call + e8/call trace-slsss/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x14/imm32 # add to esp +#? # dump *Trace-stream {{{ +#? # . write(2/stderr, "^") +#? # . . push args +#? 68/push "^"/imm32 +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # . write-stream(2/stderr, *Trace-stream) +#? # . . push args +#? ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write-stream/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # . write(2/stderr, "$\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 +#? # }}} + # check-trace-contains("Abcde") + # . . push args + 68/push "F - test-trace-slsss"/imm32 + 68/push "Abcde"/imm32 + # . . call + e8/call check-trace-contains/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +num-bytes: # line: (addr stream byte) -> eax: int + # pseudocode: + # result = 0 + # while true + # var word-slice = next-word(line) + # if slice-empty?(word-slice) # end of line + # break + # if slice-starts-with?(word-slice, "#") # comment + # break + # if is-label?(word-slice) # no need for label declarations anymore + # break + # if slice-equal?(word-slice, "==") + # break # no need for segment header lines + # result += compute-width(word-slice) + # return result + # + # . 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 + # var result/eax = 0 + 31/xor 3/mod/direct 0/rm32/eax . . . 0/r32/eax . . # clear eax + # var word-slice/ecx: slice + 68/push 0/imm32/end + 68/push 0/imm32/start + 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx +#? # 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 +#? ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) +#? 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 "$\n"/imm32 +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # }}} + # . rewind-stream(line) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + # . . call + e8/call rewind-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +$num-bytes:loop: + # next-word(line, word-slice) + # . . push args + 51/push-ecx + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + # . . call + e8/call next-word/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->buffer) +#? # . . push args +#? 68/push $Stderr->buffer/imm32 +#? # . . call +#? e8/call clear-stream/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +#? # . write-slice-buffered(Stderr, word-slice) +#? # . . push args +#? 51/push-ecx +#? 68/push Stderr/imm32 +#? # . . call +#? e8/call write-slice-buffered/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # . flush(Stderr) +#? # . . push args +#? 68/push Stderr/imm32 +#? # . . call +#? e8/call flush/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +#? # . write(2/stderr, "$\n") +#? # . . push args +#? 68/push "$\n"/imm32 +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # }}} +$num-bytes:check0: + # if (slice-empty?(word-slice)) break + # . save result + 50/push-eax + # . eax = slice-empty?(word-slice) + # . . push args + 51/push-ecx + # . . 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 != false) break + 3d/compare-eax-and 0/imm32/false + # . restore result now that ZF is set + 58/pop-to-eax + 75/jump-if-!= $num-bytes:end/disp8 +$num-bytes:check-for-comment: + # if (slice-starts-with?(word-slice, "#")) break + # . start/edx = word-slice->start + 8b/copy 0/mod/indirect 1/rm32/ecx . . . 2/r32/edx . . # copy *ecx to edx + # . c/ebx = *start + 31/xor 3/mod/direct 3/rm32/ebx . . . 3/r32/ebx . . # clear ebx + 8a/copy-byte 0/mod/indirect 2/rm32/edx . . . 3/r32/BL . . # copy byte at *edx to BL + # . if (ebx == '#') break + 81 7/subop/compare 3/mod/direct 3/rm32/ebx . . . . . 0x23/imm32/hash # compare ebx + 74/jump-if-= $num-bytes:end/disp8 +$num-bytes:check-for-label: + # if (slice-ends-with?(word-slice, ":")) break + # . end/edx = word-slice->end + 8b/copy 1/mod/*+disp8 1/rm32/ecx . . . 2/r32/edx 4/disp8 . # copy *(ecx+4) to edx + # . c/ebx = *(end-1) + 31/xor 3/mod/direct 3/rm32/ebx . . . 3/r32/ebx . . # clear ebx + 8a/copy-byte 1/mod/*+disp8 2/rm32/edx . . . 3/r32/BL -1/disp8 . # copy byte at *ecx to BL + # . if (ebx == ':') break + 81 7/subop/compare 3/mod/direct 3/rm32/ebx . . . . . 0x3a/imm32/colon # compare ebx + 74/jump-if-= $num-bytes:end/disp8 +$num-bytes:check-for-segment-header: + # if (slice-equal?(word-slice, "==")) break + # . push result + 50/push-eax + # . eax = slice-equal?(word-slice, "==") + # . . push args + 68/push "=="/imm32 + 51/push-ecx + # . . 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 != false) break + 3d/compare-eax-and 0/imm32/false + # . restore result now that ZF is set + 58/pop-to-eax + 75/jump-if-!= $num-bytes:end/disp8 +$num-bytes:loop-body: + # result += compute-width-of-slice(word-slice) + # . copy result to edx + 89/copy 3/mod/direct 2/rm32/edx . . . 0/r32/eax . . # copy eax to edx + # . eax = compute-width-of-slice(word-slice) + # . . push args + 51/push-ecx + # . . call + e8/call compute-width-of-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . eax += result + 01/add 3/mod/direct 0/rm32/eax . . . 2/r32/edx . . # add edx to eax + e9/jump $num-bytes:loop/disp32 +$num-bytes:end: + # . rewind-stream(line) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + # . . call + e8/call rewind-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . reclaim locals + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . restore registers + 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 + +test-num-bytes-handles-empty-string: + # if a line starts with '#', return 0 + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . clear-stream(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream(_test-output-stream) + # . . push args + 68/push _test-output-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # no contents in input + # eax = num-bytes(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call num-bytes/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # check-ints-equal(eax, 0, msg) + # . . push args + 68/push "F - test-num-bytes-handles-empty-string"/imm32 + 68/push 0/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 + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-num-bytes-ignores-comments: + # if a line starts with '#', return 0 + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . clear-stream(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream(_test-output-stream) + # . . push args + 68/push _test-output-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # initialize input + # . write(_test-input-stream, "# abcd") + # . . push args + 68/push "# abcd"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # eax = num-bytes(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call num-bytes/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # check-ints-equal(eax, 0, msg) + # . . push args + 68/push "F - test-num-bytes-ignores-comments"/imm32 + 68/push 0/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 + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-num-bytes-ignores-labels: + # if the first word ends with ':', return 0 + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . clear-stream(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream(_test-output-stream) + # . . push args + 68/push _test-output-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # initialize input + # . write(_test-input-stream, "ab: # cd") + # . . push args + 68/push "ab: # cd"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # eax = num-bytes(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call num-bytes/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # check-ints-equal(eax, 0, msg) + # . . push args + 68/push "F - test-num-bytes-ignores-labels"/imm32 + 68/push 0/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 + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-num-bytes-ignores-segment-headers: + # if the first word is '==', return 0 + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . clear-stream(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream(_test-output-stream) + # . . push args + 68/push _test-output-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # initialize input + # . write(_test-input-stream, "== ab cd") + # . . push args + 68/push "== ab cd"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # eax = num-bytes(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call num-bytes/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # check-ints-equal(eax, 0, msg) + # . . push args + 68/push "F - test-num-bytes-ignores-segment-headers"/imm32 + 68/push 0/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 + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-num-bytes-counts-words-by-default: + # without metadata, count words + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . clear-stream(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream(_test-output-stream) + # . . push args + 68/push _test-output-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # initialize input + # . write(_test-input-stream, "ab cd ef") + # . . push args + 68/push "ab cd ef"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # eax = num-bytes(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call num-bytes/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # check-ints-equal(eax, 3, msg) + # . . push args + 68/push "F - test-num-bytes-counts-words-by-default"/imm32 + 68/push 3/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 + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-num-bytes-ignores-trailing-comment: + # trailing comments appropriately ignored + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . clear-stream(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream(_test-output-stream) + # . . push args + 68/push _test-output-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # initialize input + # . write(_test-input-stream, "ab cd # ef") + # . . push args + 68/push "ab cd # ef"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # eax = num-bytes(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call num-bytes/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # check-ints-equal(eax, 2, msg) + # . . push args + 68/push "F - test-num-bytes-ignores-trailing-comment"/imm32 + 68/push 2/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 + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-num-bytes-handles-imm32: + # if a word has the /imm32 metadata, count it as 4 bytes + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . clear-stream(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream(_test-output-stream) + # . . push args + 68/push _test-output-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # initialize input + # . write(_test-input-stream, "ab cd/imm32 ef") + # . . push args + 68/push "ab cd/imm32 ef"/imm32 + 68/push _test-input-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # eax = num-bytes(_test-input-stream) + # . . push args + 68/push _test-input-stream/imm32 + # . . call + e8/call num-bytes/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # check-ints-equal(eax, 6, msg) + # . . push args + 68/push "F - test-num-bytes-handles-imm32"/imm32 + 68/push 6/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 + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +== data + +# This block of bytes gets copied to the start of the output ELF file, with +# some fields (the ones with labels capitalized) filled in. +# http://www.sco.com/developers/gabi/latest/ch4.eheader.html +Elf_header: + # - size + 0x34/imm32 + # - data +$e_ident: + 7f 45/E 4c/L 46/F + 01/32-bit 01/little-endian 01/file-version 00/no-os-extensions + 00 00 00 00 00 00 00 00 # 8 bytes of padding +$e_type: + 02 00 +$e_machine: + 03 00 +$e_version: + 1/imm32 +$Elf_e_entry: + 0x09000000/imm32 # approximate default; must be updated +$e_phoff: + 0x34/imm32 # offset for the 'program header table' containing segment headers +$e_shoff: + 0/imm32 # no sections +$e_flags: + 0/imm32 # unused +$e_ehsize: + 0x34 00 +$e_phentsize: + 0x20 00 +$Elf_e_phnum: + 00 00 # number of segments; must be updated +$e_shentsize: + 00 00 # no sections +$e_shnum: + 00 00 +$e_shstrndx: + 00 00 + +# This block of bytes gets copied after the Elf_header once for each segment. +# Some fields need filling in each time. +# https://docs.oracle.com/cd/E19683-01/816-1386/chapter6-83432/index.html +Elf_program_header_entry: + # - size + 0x20/imm32 + # - data +$p_type: + 1/imm32/PT_LOAD +$Elf_p_offset: + 0/imm32 # byte offset in the file at which a segment begins; must be updated +$Elf_p_vaddr: + 0/imm32 # starting address to store the segment at before running the program +$Elf_p_paddr: + 0/imm32 # should have same value as $Elf_p_vaddr +$Elf_p_filesz: + 0/imm32 +$Elf_p_memsz: + 0/imm32 # should have same value as $Elf_p_filesz +$Elf_p_flags: + 6/imm32/rw- # read/write/execute permissions for the segment; must be updated for the code segment +$p_align: + # we hold this constant; changing it will require adjusting the way we + # compute the starting address for each segment + 0x1000/imm32 + +# . . vim:nowrap:textwidth=0 |