diff options
Diffstat (limited to 'linux/130emit.subx')
| -rw-r--r-- | linux/130emit.subx | 473 |
1 files changed, 473 insertions, 0 deletions
diff --git a/linux/130emit.subx b/linux/130emit.subx new file mode 100644 index 00000000..154b1bea --- /dev/null +++ b/linux/130emit.subx @@ -0,0 +1,473 @@ +== 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 + +# If datum of 'word' is not a valid name, it must be a hex int. Parse and print +# it in 'width' bytes of hex, least significant first. +# Otherwise just print the entire word including metadata. +# Always print a trailing space. +emit: # out: (addr buffered-file), word: (addr slice), width: int + # . 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 + 57/push-edi + # esi = word + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 0xc/disp8 . # copy *(ebp+12) to esi + # var datum/edi: slice + 68/push 0/imm32/end + 68/push 0/imm32/start + 89/copy 3/mod/direct 7/rm32/edi . . . 4/r32/esp . . # copy esp to edi + # datum = next-token-from-slice(word->start, word->end, '/') + # . . push args + 57/push-edi + 68/push 0x2f/imm32/slash + 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 next-token-from-slice/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # add to esp + # if (is-valid-name?(datum)) write-slice-buffered(out, word) and return + # . eax = is-valid-name?(name) + # . . push args + 57/push-edi + # . . call + e8/call is-valid-name?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . if (eax != false) + 3d/compare-eax-and 0/imm32/false + 74/jump-if-= $emit:hex-int/disp8 +$emit:name: + # . write-slice-buffered(out, word) + # . . push args + 56/push-esi + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + # . . 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 . . . . 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 + # . return + eb/jump $emit:end/disp8 + # otherwise emit-hex(out, parse-hex-int-from-slice(datum), width) + # (Weird shit can happen here if the datum of 'word' isn't either a valid + # name or a hex number. `emit` is mostly used by translate_subx, which + # is currently designed to only receive legal SubX programs. We just + # want to make sure that valid names aren't treated as (valid) hex + # numbers.) +$emit:hex-int: + # . var value/eax: int = parse-hex-int-from-slice(datum) + # . . push args + 57/push-edi + # . . 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 + # . emit-hex(out, value, width) + # . . push args + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x10/disp8 . # push *(ebp+16) + 50/push-eax + ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) + # . . call + e8/call emit-hex/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp +$emit:end: + # . reclaim locals + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + # . restore registers + 5f/pop-to-edi + 5e/pop-to-esi + 58/pop-to-eax + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-emit-number: + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . clear-stream(_test-output-stream) + # . . push args + 68/push _test-output-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream($_test-output-buffered-file->buffer) + # . . push args + 68/push $_test-output-buffered-file->buffer/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # (eax..ecx) = "30" + b8/copy-to-eax "30"/imm32 + 8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx + 05/add-to-eax 4/imm32 + # var slice/ecx: slice = {eax, ecx} + 51/push-ecx + 50/push-eax + 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx + # emit(_test-output-buffered-file, slice, 1) + # . . push args + 68/push 1/imm32 + 51/push-ecx + 68/push _test-output-buffered-file/imm32 + # . . call + e8/call emit/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # flush(_test-output-buffered-file) + # . . push args + 68/push _test-output-buffered-file/imm32 + # . . call + e8/call flush/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # check-stream-equal(_test-output-stream, "30 ", msg) + # . . push args + 68/push "F - test-emit-number/1"/imm32 + 68/push "30 "/imm32 + 68/push _test-output-stream/imm32 + # . . call + e8/call check-stream-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-emit-negative-number: + # test support for sign-extending negative numbers + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . clear-stream(_test-output-stream) + # . . push args + 68/push _test-output-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream($_test-output-buffered-file->buffer) + # . . push args + 68/push $_test-output-buffered-file->buffer/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # (eax..ecx) = "-2" + b8/copy-to-eax "-2"/imm32 + 8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx + 05/add-to-eax 4/imm32 + # var slice/ecx: slice = {eax, ecx} + 51/push-ecx + 50/push-eax + 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx + # emit(_test-output-buffered-file, slice, 2) + # . . push args + 68/push 2/imm32 + 51/push-ecx + 68/push _test-output-buffered-file/imm32 + # . . call + e8/call emit/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # flush(_test-output-buffered-file) + # . . push args + 68/push _test-output-buffered-file/imm32 + # . . call + e8/call flush/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # check-stream-equal(_test-output-stream, "fe ff ", msg) + # . . push args + 68/push "F - test-emit-number/1"/imm32 + 68/push "fe ff "/imm32 + 68/push _test-output-stream/imm32 + # . . call + e8/call check-stream-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-emit-number-with-metadata: + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . clear-stream(_test-output-stream) + # . . push args + 68/push _test-output-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream($_test-output-buffered-file->buffer) + # . . push args + 68/push $_test-output-buffered-file->buffer/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # (eax..ecx) = "-2/foo" + b8/copy-to-eax "-2/foo"/imm32 + 8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx + 05/add-to-eax 4/imm32 + # var slice/ecx: slice = {eax, ecx} + 51/push-ecx + 50/push-eax + 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx + # emit(_test-output-buffered-file, slice, 2) + # . . push args + 68/push 2/imm32 + 51/push-ecx + 68/push _test-output-buffered-file/imm32 + # . . call + e8/call emit/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # flush(_test-output-buffered-file) + # . . push args + 68/push _test-output-buffered-file/imm32 + # . . call + e8/call flush/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # the '/foo' will have no impact on the output + # check-stream-equal(_test-output-stream, "fe ff ", msg) + # . . push args + 68/push "F - test-emit-number-with-metadata"/imm32 + 68/push "fe ff "/imm32 + 68/push _test-output-stream/imm32 + # . . call + e8/call check-stream-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-emit-non-number: + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . clear-stream(_test-output-stream) + # . . push args + 68/push _test-output-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream($_test-output-buffered-file->buffer) + # . . push args + 68/push $_test-output-buffered-file->buffer/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # (eax..ecx) = "xyz" + b8/copy-to-eax "xyz"/imm32 + 8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx + 05/add-to-eax 4/imm32 + # var slice/ecx: slice = {eax, ecx} + 51/push-ecx + 50/push-eax + 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx + # emit(_test-output-buffered-file, slice, 2) + # . . push args + 68/push 2/imm32 + 51/push-ecx + 68/push _test-output-buffered-file/imm32 + # . . call + e8/call emit/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # flush(_test-output-buffered-file) + # . . push args + 68/push _test-output-buffered-file/imm32 + # . . call + e8/call flush/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # check-stream-equal(_test-output-stream, "xyz", msg) + # . . push args + 68/push "F - test-emit-non-number"/imm32 + 68/push "xyz "/imm32 + 68/push _test-output-stream/imm32 + # . . call + e8/call check-stream-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-emit-non-number-with-metadata: + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . clear-stream(_test-output-stream) + # . . push args + 68/push _test-output-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream($_test-output-buffered-file->buffer) + # . . push args + 68/push $_test-output-buffered-file->buffer/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # (eax..ecx) = "xyz/" + b8/copy-to-eax "xyz/"/imm32 + 8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx + 05/add-to-eax 4/imm32 + # var slice/ecx: slice = {eax, ecx} + 51/push-ecx + 50/push-eax + 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx + # emit(_test-output-buffered-file, slice, 2) + # . . push args + 68/push 2/imm32 + 51/push-ecx + 68/push _test-output-buffered-file/imm32 + # . . call + e8/call emit/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # flush(_test-output-buffered-file) + # . . push args + 68/push _test-output-buffered-file/imm32 + # . . call + e8/call flush/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # check-stream-equal(_test-output-stream, "xyz/", msg) + # . . push args + 68/push "F - test-emit-non-number-with-metadata"/imm32 + 68/push "xyz/ "/imm32 + 68/push _test-output-stream/imm32 + # . . call + e8/call check-stream-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # . epilogue + 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp + 5d/pop-to-ebp + c3/return + +test-emit-non-number-with-all-hex-digits-and-metadata: + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # setup + # . clear-stream(_test-output-stream) + # . . push args + 68/push _test-output-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # . clear-stream($_test-output-buffered-file->buffer) + # . . push args + 68/push $_test-output-buffered-file->buffer/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp + # (eax..ecx) = "abcd/xyz" + b8/copy-to-eax "abcd/xyz"/imm32 + 8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx + 05/add-to-eax 4/imm32 + # var slice/ecx: slice = {eax, ecx} + 51/push-ecx + 50/push-eax + 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx + # emit(_test-output-buffered-file, slice, 2) + # . . push args + 68/push 2/imm32 + 51/push-ecx + 68/push _test-output-buffered-file/imm32 + # . . call + e8/call emit/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp + # flush(_test-output-buffered-file) + # . . push args + 68/push _test-output-buffered-file/imm32 + # . . call + e8/call flush/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp +#? # dump output {{{ +#? # . write(2/stderr, "^") +#? # . . push args +#? 68/push "^"/imm32 +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # . write-stream(2/stderr, _test-output-stream) +#? # . . push args +#? 68/push _test-output-stream/imm32 +#? 68/push 2/imm32/stderr +#? # . . call +#? e8/call write-stream/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # . write(2/stderr, "$\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 +#? # }}} + # check-stream-equal(_test-output-stream, "abcd/xyz") + # . . push args + 68/push "F - test-emit-non-number-with-all-hex-digits"/imm32 + 68/push "abcd/xyz "/imm32 + 68/push _test-output-stream/imm32 + # . . call + e8/call check-stream-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 |