# 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/bootstrap translate [01]*.subx subx-params.subx survey_elf.subx -o 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/bootstrap run 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/in
## print out a (global variable) string to stdout

var size : int = 14
var x : (array character) = "hello, world!"

fn main [
  call write 1/stdout, x, size
  call exit, 0
]

fn write fd : int, x : (address array byte), size : int [
  EBX <- copy fd
  ECX <- copy x
  EDX <- copy size
  EAX <- copy 4/write
  syscall
]

fn exit x : int [
  code/EBX <- copy x
  code/EAX <- copy 1/exit
  syscall
]
generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-11-17 00:34:57 +0000
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 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) # . . 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 # 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) # . . 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 $compute-offsets:case-empty: # 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 != 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 # . . push args 68/push "#"/imm32 52/push-edx # . . call 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, "==") # . . 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) 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) # . . push args 68/push compute-offsets:segment-tmp/imm32 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?(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) # . . push args 68/push compute-offsets:segment-tmp/imm32 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?(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 (!label?(word-slice)) goto next case # . eax = label?(word-slice) # . . push args 52/push-edx # . . call e8/call 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 optionally an address\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 far-jump-or-call? = 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 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 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 # 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 far-jump-or-call?/edi: boolean = far-jump-or-call?(line) # . . push args 51/push-ecx # . . call e8/call 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 label?(word-slice) break # . eax = label?(word-slice) # . . push args 52/push-edx # . . call e8/call 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 (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: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 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 $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-!= $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-!= $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-!= $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-= $far-jump-or-call?:end/disp8 $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-!= $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-!= $far-jump-or-call?:end/disp8 # otherwise return true $far-jump-or-call?:return-true: bf/copy-to-edi 1/imm32/true $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 "$\n"/imm32 #? 68/push 2/imm32/stderr #? # . . call #? e8/call write/disp32 #? # . . discard args #? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp #? # }}} # check-trace-contains("Abcde") # . . push args 68/push "F - test-trace-slsss"/imm32 68/push "Abcde"/imm32 # . . call e8/call check-trace-contains/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return num-bytes: # line: (addr stream byte) -> eax: int # pseudocode: # result = 0 # while true # var word-slice = next-word(line) # if slice-empty?(word-slice) # end of line # break # if slice-starts-with?(word-slice, "#") # comment # break # if label?(word-slice) # no need for label declarations anymore # break # if slice-equal?(word-slice, "==") # break # no need for segment header lines # result += compute-width(word-slice) # return result # # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # . save registers 51/push-ecx 52/push-edx 53/push-ebx # var result/eax = 0 31/xor 3/mod/direct 0/rm32/eax . . . 0/r32/eax . . # clear eax # var word-slice/ecx: slice 68/push 0/imm32/end 68/push 0/imm32/start 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx #? # dump line {{{ #? # . write(2/stderr, "LL: ") #? # . . push args #? 68/push "LL: "/imm32 #? 68/push 2/imm32/stderr #? # . . call #? e8/call write/disp32 #? # . . discard args #? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp #? # write-stream(2/stderr, line) #? # . . push args #? ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) #? 68/push 2/imm32/stderr #? # . . call #? e8/call write-stream/disp32 #? # . . discard args #? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp #? # . write(2/stderr, "$\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