71e4f38129
Baremetal is now the default build target and therefore has its sources at the top-level. Baremetal programs build using the phase-2 Mu toolchain that requires a Linux kernel. This phase-2 codebase which used to be at the top-level is now under the linux/ directory. Finally, the phase-2 toolchain, while self-hosting, has a way to bootstrap from a C implementation, which is now stored in linux/bootstrap. The bootstrap C implementation uses some literate programming tools that are now in linux/bootstrap/tools. So the whole thing has gotten inverted. Each directory should build one artifact and include the main sources (along with standard library). Tools used for building it are relegated to sub-directories, even though those tools are often useful in their own right, and have had lots of interesting programs written using them. A couple of things have gotten dropped in this process: - I had old ways to run on just a Linux kernel, or with a Soso kernel. No more. - I had some old tooling for running a single test at the cursor. I haven't used that lately. Maybe I'll bring it back one day. The reorg isn't done yet. Still to do: - redo documentation everywhere. All the README files, all other markdown, particularly vocabulary.md. - clean up how-to-run comments at the start of programs everywhere - rethink what to do with the html/ directory. Do we even want to keep supporting it? In spite of these shortcomings, all the scripts at the top-level, linux/ and linux/bootstrap are working. The names of the scripts also feel reasonable. This is a good milestone to take stock at.
417 lines
25 KiB
Plaintext
417 lines
25 KiB
Plaintext
== code
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# instruction effective address register displacement immediate
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# . op subop mod rm32 base index scale r32
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# . 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
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# (re)compute the bounds of the next word or string literal in the line
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# return empty string on reaching end of file
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next-word-or-string: # line: (addr stream byte), out: (addr slice)
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# . save registers
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50/push-eax
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51/push-ecx
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56/push-esi
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57/push-edi
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# esi = line
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8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 8/disp8 . # copy *(ebp+8) to esi
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# edi = out
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8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 7/r32/edi 0xc/disp8 . # copy *(ebp+12) to edi
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# skip-chars-matching(line, ' ')
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# . . push args
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68/push 0x20/imm32/space
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ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8)
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# . . call
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e8/call skip-chars-matching/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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$next-word-or-string:check0:
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# if (line->read >= line->write) clear out and return
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# . eax = line->read
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8b/copy 1/mod/*+disp8 6/rm32/esi . . . 0/r32/eax 4/disp8 . # copy *(esi+4) to eax
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# . if (eax < line->write) goto next check
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3b/compare 0/mod/indirect 6/rm32/esi . . . 0/r32/eax . . # compare eax with *esi
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7c/jump-if-< $next-word-or-string:check-for-comment/disp8
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# . return out
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c7 0/subop/copy 0/mod/direct 7/rm32/edi . . . . . 0/imm32 # copy to *edi
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c7 0/subop/copy 1/mod/*+disp8 7/rm32/edi . . . . 4/disp8 0/imm32 # copy to *(edi+4)
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eb/jump $next-word-or-string:end/disp8
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$next-word-or-string:check-for-comment:
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# out->start = &line->data[line->read]
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8b/copy 1/mod/*+disp8 6/rm32/esi . . . 1/r32/ecx 4/disp8 . # copy *(esi+4) to ecx
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8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 1/index/ecx . 0/r32/eax 0xc/disp8 . # copy esi+ecx+12 to eax
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89/copy 0/mod/indirect 7/rm32/edi . . . 0/r32/eax . . # copy eax to *edi
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# if (line->data[line->read] != '#') goto next check
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# . eax = line->data[line->read]
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31/xor 3/mod/direct 0/rm32/eax . . . 0/r32/eax . . # clear eax
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8a/copy-byte 1/mod/*+disp8 4/rm32/sib 6/base/esi 1/index/ecx . 0/r32/AL 0xc/disp8 . # copy byte at *(esi+ecx+12) to AL
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# . compare
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3d/compare-eax-and 0x23/imm32/pound
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75/jump-if-!= $next-word-or-string:check-for-string-literal/disp8
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$next-word-or-string:comment:
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# out->end = &line->data[line->write]
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8b/copy 0/mod/indirect 6/rm32/esi . . . 0/r32/eax . . # copy *esi to eax
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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
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89/copy 1/mod/*+disp8 7/rm32/edi . . . 0/r32/eax 4/disp8 . # copy eax to *(edi+4)
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# line->read = line->write # skip rest of line
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8b/copy 0/mod/indirect 6/rm32/esi . . . 0/r32/eax . . # copy *esi to eax
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89/copy 1/mod/*+disp8 6/rm32/esi . . . 0/r32/eax 4/disp8 . # copy eax to *(esi+4)
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# return
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eb/jump $next-word-or-string:end/disp8
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$next-word-or-string:check-for-string-literal:
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# if (line->data[line->read] != '"') goto next check
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# . eax = line->data[line->read]
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31/xor 3/mod/direct 0/rm32/eax . . . 0/r32/eax . . # clear eax
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8a/copy-byte 1/mod/*+disp8 4/rm32/sib 6/base/esi 1/index/ecx . 0/r32/AL 0xc/disp8 . # copy byte at *(esi+ecx+12) to AL
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# . compare
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3d/compare-eax-and 0x22/imm32/dquote
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75/jump-if-!= $next-word-or-string:regular-word/disp8
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$next-word-or-string:string-literal:
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# skip-string(line)
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# . . push args
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56/push-esi
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# . . call
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e8/call skip-string/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
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# fall through
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$next-word-or-string:regular-word:
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# skip-chars-not-matching-whitespace(line) # including trailing newline
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# . . push args
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ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8)
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# . . call
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e8/call skip-chars-not-matching-whitespace/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
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# out->end = &line->data[line->read]
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8b/copy 1/mod/*+disp8 6/rm32/esi . . . 1/r32/ecx 4/disp8 . # copy *(esi+4) to ecx
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8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 1/index/ecx . 0/r32/eax 0xc/disp8 . # copy esi+ecx+12 to eax
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89/copy 1/mod/*+disp8 7/rm32/edi . . . 0/r32/eax 4/disp8 . # copy eax to *(edi+4)
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$next-word-or-string:end:
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# . restore registers
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5f/pop-to-edi
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5e/pop-to-esi
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59/pop-to-ecx
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58/pop-to-eax
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# . epilogue
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89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
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5d/pop-to-ebp
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c3/return
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test-next-word-or-string:
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# setup
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# . clear-stream(_test-input-stream)
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# . . push args
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68/push _test-input-stream/imm32
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# . . call
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e8/call clear-stream/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
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# var slice/ecx: slice
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68/push 0/imm32/end
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68/push 0/imm32/start
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89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
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# write(_test-input-stream, " ab")
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# . . push args
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68/push " ab"/imm32
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68/push _test-input-stream/imm32
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# next-word-or-string(_test-input-stream, slice)
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# . . push args
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51/push-ecx
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68/push _test-input-stream/imm32
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# . . call
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e8/call next-word-or-string/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# check-ints-equal(_test-input-stream->read, 4, msg)
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# . . push args
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68/push "F - test-next-word-or-string/updates-stream-read-correctly"/imm32
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68/push 4/imm32
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b8/copy-to-eax _test-input-stream/imm32
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ff 6/subop/push 1/mod/*+disp8 0/rm32/eax . . . . 4/disp8 . # push *(eax+4)
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# check-ints-equal(slice->start - _test-input-stream->data, 2, msg)
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# . check-ints-equal(slice->start - _test-input-stream, 14, msg)
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# . . push args
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68/push "F - test-next-word-or-string: start"/imm32
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68/push 0xe/imm32
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# . . push slice->start - _test-input-stream
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8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax
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81 5/subop/subtract 3/mod/direct 0/rm32/eax . . . . . _test-input-stream/imm32 # subtract from eax
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50/push-eax
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# check-ints-equal(slice->end - _test-input-stream->data, 4, msg)
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# . check-ints-equal(slice->end - _test-input-stream, 16, msg)
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# . . push args
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68/push "F - test-next-word-or-string: end"/imm32
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68/push 0x10/imm32
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# . . push slice->end - _test-input-stream
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8b/copy 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy *(ecx+4) to eax
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81 5/subop/subtract 3/mod/direct 0/rm32/eax . . . . . _test-input-stream/imm32 # subtract from eax
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50/push-eax
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# . epilogue
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89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
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5d/pop-to-ebp
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c3/return
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test-next-word-or-string-returns-whole-comment:
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# setup
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# . clear-stream(_test-input-stream)
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# . . push args
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68/push _test-input-stream/imm32
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# . . call
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e8/call clear-stream/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
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# var slice/ecx: slice
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68/push 0/imm32/end
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68/push 0/imm32/start
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89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
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# write(_test-input-stream, " # a")
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# . . push args
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68/push " # a"/imm32
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68/push _test-input-stream/imm32
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# next-word-or-string(_test-input-stream, slice)
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# . . push args
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51/push-ecx
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68/push _test-input-stream/imm32
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# . . call
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e8/call next-word-or-string/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# check-ints-equal(_test-input-stream->read, 5, msg)
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# . . push args
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68/push "F - test-next-word-or-string-returns-whole-comment/updates-stream-read-correctly"/imm32
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68/push 5/imm32
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b8/copy-to-eax _test-input-stream/imm32
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ff 6/subop/push 1/mod/*+disp8 0/rm32/eax . . . . 4/disp8 . # push *(eax+4)
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# check-ints-equal(slice->start - _test-input-stream->data, 2, msg)
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# . check-ints-equal(slice->start - _test-input-stream, 14, msg)
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# . . push args
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68/push "F - test-next-word-or-string-returns-whole-comment: start"/imm32
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68/push 0xe/imm32
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# . . push slice->start - _test-input-stream
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8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax
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81 5/subop/subtract 3/mod/direct 0/rm32/eax . . . . . _test-input-stream/imm32 # subtract from eax
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50/push-eax
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# check-ints-equal(slice->end - _test-input-stream->data, 5, msg)
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# . check-ints-equal(slice->end - _test-input-stream, 17, msg)
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# . . push args
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68/push "F - test-next-word-or-string-returns-whole-comment: end"/imm32
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68/push 0x11/imm32
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# . . push slice->end - _test-input-stream
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8b/copy 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy *(ecx+4) to eax
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81 5/subop/subtract 3/mod/direct 0/rm32/eax . . . . . _test-input-stream/imm32 # subtract from eax
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50/push-eax
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# . epilogue
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89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
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5d/pop-to-ebp
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c3/return
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test-next-word-or-string-returns-empty-slice-on-eof:
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# setup
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# . clear-stream(_test-input-stream)
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# . . push args
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68/push _test-input-stream/imm32
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# . . call
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e8/call clear-stream/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
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# var slice/ecx: slice
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68/push 0/imm32/end
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68/push 0/imm32/start
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89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
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# write nothing to _test-input-stream
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# next-word-or-string(_test-input-stream, slice)
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# . . push args
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51/push-ecx
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68/push _test-input-stream/imm32
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# . . call
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e8/call next-word-or-string/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# check-ints-equal(slice->end - slice->start, 0, msg)
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# . . push args
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68/push "F - test-next-word-or-string-returns-empty-string-on-eof"/imm32
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68/push 0/imm32
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# . . push slice->end - slice->start
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8b/copy 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy *(ecx+4) to eax
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2b/subtract 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # subtract *ecx from eax
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50/push-eax
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# . epilogue
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89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
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5d/pop-to-ebp
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c3/return
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test-next-word-or-string-returns-string-literal:
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# setup
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# . clear-stream(_test-input-stream)
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# . . push args
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68/push _test-input-stream/imm32
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# . . call
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e8/call clear-stream/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
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# var slice/ecx: slice
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68/push 0/imm32/end
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68/push 0/imm32/start
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89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
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# write(_test-input-stream, " \"a b\"/imm32 ")
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# . . push args
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68/push " \"a b\"/imm32 "/imm32
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68/push _test-input-stream/imm32
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# next-word-or-string(_test-input-stream, slice)
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# . . push args
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51/push-ecx
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68/push _test-input-stream/imm32
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# . . call
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e8/call next-word-or-string/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# check-ints-equal(slice->start - _test-input-stream->data, 1, msg)
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# . check-ints-equal(slice->start - _test-input-stream, 13, msg)
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# . . push args
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68/push "F - test-next-word-or-string-returns-string-literal: start"/imm32
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68/push 0xd/imm32
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# . . push slice->start - _test-input-stream
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8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax
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81 5/subop/subtract 3/mod/direct 0/rm32/eax . . . . . _test-input-stream/imm32 # subtract from eax
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50/push-eax
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# check-ints-equal(slice->end - _test-input-stream->data, 12, msg)
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# . check-ints-equal(slice->end - _test-input-stream, 24, msg)
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# . . push args
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68/push "F - test-next-word-or-string-returns-string-literal: end"/imm32
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68/push 0x18/imm32
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# . . push slice->end - _test-input-stream
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8b/copy 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy *(ecx+4) to eax
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81 5/subop/subtract 3/mod/direct 0/rm32/eax . . . . . _test-input-stream/imm32 # subtract from eax
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50/push-eax
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# . epilogue
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89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
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5d/pop-to-ebp
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c3/return
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test-next-word-or-string-returns-string-with-escapes:
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# setup
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# . clear-stream(_test-input-stream)
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# . . push args
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68/push _test-input-stream/imm32
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# . . call
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e8/call clear-stream/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
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# var slice/ecx: slice
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68/push 0/imm32/end
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68/push 0/imm32/start
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89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
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# write(_test-input-stream, " \"a\\\"b\"/x")
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# . . push args
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68/push " \"a\\\"b\"/x"/imm32
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68/push _test-input-stream/imm32
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# . . call
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e8/call write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# next-word-or-string(_test-input-stream, slice)
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# . . push args
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51/push-ecx
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68/push _test-input-stream/imm32
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# . . call
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e8/call next-word-or-string/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# check-ints-equal(slice->start - _test-input-stream->data, 1, msg)
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# . check-ints-equal(slice->start - _test-input-stream, 13, msg)
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# . . push args
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68/push "F - test-next-word-or-string-returns-string-with-escapes: start"/imm32
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|
68/push 0xd/imm32
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# . . push slice->start - _test-input-stream
|
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8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax
|
|
81 5/subop/subtract 3/mod/direct 0/rm32/eax . . . . . _test-input-stream/imm32 # subtract from eax
|
|
50/push-eax
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|
# . . call
|
|
e8/call check-ints-equal/disp32
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|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-ints-equal(slice->end - _test-input-stream->data, 9, msg)
|
|
# . check-ints-equal(slice->end - _test-input-stream, 21, msg)
|
|
# . . push args
|
|
68/push "F - test-next-word-or-string-returns-string-with-escapes: end"/imm32
|
|
68/push 0x15/imm32
|
|
# . . push slice->end - _test-input-stream
|
|
8b/copy 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy *(ecx+4) to eax
|
|
81 5/subop/subtract 3/mod/direct 0/rm32/eax . . . . . _test-input-stream/imm32 # subtract from eax
|
|
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
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|
|
|
# . . vim:nowrap:textwidth=0
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