From 03c6f1d3858ff0fdb6af6ce4b61bea51f16b33be Mon Sep 17 00:00:00 2001 From: Kartik Agaram Date: Sat, 2 Feb 2019 22:05:11 -0800 Subject: 4949 --- subx/060write-stream.subx | 243 ---------------------------------------------- 1 file changed, 243 deletions(-) delete mode 100644 subx/060write-stream.subx (limited to 'subx/060write-stream.subx') diff --git a/subx/060write-stream.subx b/subx/060write-stream.subx deleted file mode 100644 index f112dee9..00000000 --- a/subx/060write-stream.subx +++ /dev/null @@ -1,243 +0,0 @@ -# write-stream: like write, but write streams rather than strings - -== 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 - -# main: - # manual test -#? # write-stream(stdout, _test-stream2) -#? 68/push _test-stream2/imm32 -#? 68/push 1/imm32/stdout -#? e8/call write-stream/disp32 - # automatic test -#? e8/call test-write-stream-appends/disp32 - e8/call run-tests/disp32 # 'run-tests' is a function created automatically by SubX. It calls all functions that start with 'test-'. - # 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 - b8/copy-to-EAX 1/imm32/exit - cd/syscall 0x80/imm8 - -write-stream: # f : fd or (address stream), s : (address stream) -> - # . prolog - 55/push-EBP - 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP - # if (f < 0x08000000) _write-stream(f, s), return # f can't be a user-mode address, so treat it as a kernel file descriptor - 81 7/subop/compare 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 0x08000000/imm32 # compare *(EBP+8) - 7d/jump-if-greater-or-equal $write-stream:fake/disp8 - # . . push args - 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 _write-stream/disp32 - # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP - eb/jump $write-stream:end/disp8 -$write-stream:fake: - # otherwise, treat 'f' as a stream to append to - # . save registers - 50/push-EAX - 56/push-ESI - 57/push-EDI - # EDI = f - 8b/copy 1/mod/*+disp8 5/rm32/EBP . . 7/r32/EDI 8/disp8 . # copy *(EBP+8) to EDI - # ESI = s - 8b/copy 1/mod/*+disp8 5/rm32/EBP . . 6/r32/ESI 0xc/disp8 . # copy *(EBP+12) to ESI - # EAX = _append-4(&f->data[f->write], &f->data[f->length], &s->data[s->read], &s->data[s->write]) - # . . push &s->data[s->write] - 8b/copy 0/mod/indirect 6/rm32/ESI . . . 0/r32/EAX . . # copy *ESI to EAX - 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 - 50/push-EAX - # . . push &s->data[s->read] - 8b/copy 1/mod/*+disp8 6/rm32/ESI . . . 0/r32/EAX 4/disp8 . # copy *(ESI+4) to EAX - 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 - 50/push-EAX - # . . push &f->data[f->length] - 8b/copy 1/mod/*+disp8 7/rm32/EDI . . . 0/r32/EAX 8/disp8 . # copy *(EDI+8) to EAX - 8d/copy-address 1/mod/*+disp8 4/rm32/sib 7/base/EDI 0/index/EAX . 0/r32/EAX 0xc/disp8 . # copy EDI+EAX+12 to EAX - 50/push-EAX - # . . push &f->data[f->write] - 8b/copy 0/mod/indirect 7/rm32/EDI . . . 0/r32/EAX . . # copy *EDI to EAX - 8d/copy-address 1/mod/*+disp8 4/rm32/sib 7/base/EDI 0/index/EAX . 0/r32/EAX 0xc/disp8 . # copy EDI+EAX+12 to EAX - 50/push-EAX - # . . call - e8/call _append-4/disp32 - # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x10/imm32 # add to ESP - # f->write += EAX - 01/add 0/mod/indirect 7/rm32/EDI . . . 0/r32/EAX . . # add EAX to *EDI - # s->read += EAX - 01/add 1/mod/*+disp8 6/rm32/ESI . . . 0/r32/EAX 4/disp8 . # add EAX to *(ESI+4) - # . restore registers - 5f/pop-to-EDI - 5e/pop-to-ESI - 58/pop-to-EAX -$write-stream:end: - # . epilog - 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP - 5d/pop-to-EBP - c3/return - -_write-stream: # fd : int, s : (address stream) -> - # . prolog - 55/push-EBP - 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP - # . save registers - 50/push-EAX - 51/push-ECX - 52/push-EDX - 53/push-EBX - 56/push-ESI - 57/push-EDI - # ESI = s - 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 0xc/disp8 . # copy *(EBP+12) to ESI - # EDI = s->read - 8b/copy 1/mod/*+disp8 6/rm32/ESI . . . 7/r32/EDI 4/disp8 . # copy *(ESI+4) to EDI - # EDX = s->write - 8b/copy 0/mod/indirect 6/rm32/ESI . . . 2/r32/EDX . . # copy *ESI to EDX - # syscall(write, fd, &s->data[s->read], s->write - s->read) - # . . fd : EBX - 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 3/r32/EBX 8/disp8 . # copy *(EBP+8) to EBX - # . . data : ECX = &s->data[s->read] - 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/ESI 7/index/EDI . 1/r32/ECX 0xc/disp8 . # copy ESI+EDI+12 to ECX - # . . size : EDX = s->write - s->read - 29/subtract 3/mod/direct 2/rm32/EDX . . . 7/r32/EDI . . # subtract EDI from EDX - # . . syscall - b8/copy-to-EAX 4/imm32/write - cd/syscall 0x80/imm8 - # . 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 - # . epilog - 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP - 5d/pop-to-EBP - c3/return - -test-write-stream-single: - # setup - # . clear-stream(_test-stream) - # . . push args - 68/push _test-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-stream2) - # . . push args - 68/push _test-stream2/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(_test-stream2, "Ab") - # . . push args - 68/push "Ab"/imm32 - 68/push _test-stream2/imm32 - # . . call - e8/call write/disp32 - # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP - # write-stream(_test-stream, _test-stream2) - # . . push args - 68/push _test-stream2/imm32 - 68/push _test-stream/imm32 - # . . call - e8/call write-stream/disp32 - # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP - # check-ints-equal(*_test-stream->data, 41/A 62/b 00 00, msg) - # . . push args - 68/push "F - test-write-stream-single"/imm32 - 68/push 0x006241/imm32/Ab - # . . push *_test-stream->data - b8/copy-to-EAX _test-stream/imm32 - ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0xc/disp8 . # push *(EAX+12) - # . . call - e8/call check-ints-equal/disp32 - # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP - # . end - c3/return - -test-write-stream-appends: - # setup - # . clear-stream(_test-stream) - # . . push args - 68/push _test-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-stream2) - # . . push args - 68/push _test-stream2/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(_test-stream2, "C") - # . . push args - 68/push "C"/imm32 - 68/push _test-stream2/imm32 - # . . call - e8/call write/disp32 - # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP - # first write - # . write-stream(_test-stream, _test-stream2) - # . . push args - 68/push _test-stream2/imm32 - 68/push _test-stream/imm32 - # . . call - e8/call write-stream/disp32 - # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP - # second write - # . write(_test-stream2, "D") - # . . push args - 68/push "D"/imm32 - 68/push _test-stream2/imm32 - # . . call - e8/call write/disp32 - # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP - # . write-stream(_test-stream, _test-stream2) - # . . push args - 68/push _test-stream2/imm32 - 68/push _test-stream/imm32 - # . . call - e8/call write-stream/disp32 - # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP - # check-ints-equal(*_test-stream->data, 43/C 44/D 00 00, msg) - # . . push args - 68/push "F - test-write-stream-appends"/imm32 - 68/push 0x00004443/imm32/C-D - # . . push *_test-stream->data - b8/copy-to-EAX _test-stream/imm32 - ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0xc/disp8 . # push *(EAX+12) - # . . call - e8/call check-ints-equal/disp32 - # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP - # . end - c3/return - -== data - -_test-stream2: - # current write index - 04 00 00 00 - # current read index - 01 00 00 00 - # length (= 8) - 08 00 00 00 - # data - 41 42 43 44 00 00 00 00 # 8 bytes - -# . . vim:nowrap:textwidth=0 -- cgit 1.4.1-2-gfad0