diff options
Diffstat (limited to 'apps/survey_elf.subx')
| -rw-r--r-- | apps/survey_elf.subx | 4691 |
1 files changed, 0 insertions, 4691 deletions
diff --git a/apps/survey_elf.subx b/apps/survey_elf.subx deleted file mode 100644 index ac2f05b4..00000000 --- a/apps/survey_elf.subx +++ /dev/null @@ -1,4691 +0,0 @@ -# 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 |