Yet another step in the slow divergence of survey_baremetal from its survey_elf roots.
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@ -111,7 +111,7 @@ subx-survey: # infile: (addr buffered-file), out: (addr buffered-file)
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# var in: (stream byte Input-size)
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# slurp(infile, in)
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# var labels: (stream {label-name, address} Max-labels)
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# compute-offsets(in, labels)
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# compute-addresses(in, labels)
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# rewind-stream(in)
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# emit-output(in, out, labels)
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#
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@ -151,12 +151,12 @@ subx-survey: # infile: (addr buffered-file), out: (addr buffered-file)
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e8/call slurp/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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# compute-offsets(in, labels)
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# compute-addresses(in, labels)
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# . . push args
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52/push-edx
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56/push-esi
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# . . call
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e8/call compute-offsets/disp32
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e8/call compute-addresses/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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# rewind-stream(in)
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@ -459,7 +459,7 @@ test-subx-survey-computes-addresses-with-padding:
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5d/pop-to-ebp
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c3/return
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compute-offsets: # in: (addr stream byte), labels: (addr stream {(handle array byte), address})
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compute-addresses: # in: (addr stream byte), labels: (addr stream {(handle array byte), address})
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# pseudocode:
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# var current-address = 0x7c00
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# var line: (stream byte 512)
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@ -514,7 +514,7 @@ compute-offsets: # in: (addr stream byte), labels: (addr stream {(handle array
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68/push 0/imm32
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68/push 0/imm32
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89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx
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$compute-offsets:line-loop:
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$compute-addresses:line-loop:
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# clear-stream(line)
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# . . push args
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51/push-ecx
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@ -533,7 +533,7 @@ $compute-offsets:line-loop:
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# if (line->write == 0) break
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8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax
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3d/compare-eax-and 0/imm32
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0f 84/jump-if-= $compute-offsets:end/disp32
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0f 84/jump-if-= $compute-addresses:end/disp32
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#? # dump line {{{
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#? # . write(2/stderr, "LL: ")
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#? # . . push args
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@ -567,7 +567,7 @@ $compute-offsets:line-loop:
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#? # . . discard args
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#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
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#? # }}}
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$compute-offsets:word-loop:
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$compute-addresses:word-loop:
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# next-word(line, word-slice)
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# . . push args
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52/push-edx
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@ -576,7 +576,7 @@ $compute-offsets:word-loop:
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e8/call next-word/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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$compute-offsets:case-empty:
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$compute-addresses:case-empty:
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# if slice-empty?(word-slice) break
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# . eax = slice-empty?(word-slice)
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# . . push args
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@ -587,8 +587,8 @@ $compute-offsets:case-empty:
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
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# . if (eax != false) break
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3d/compare-eax-and 0/imm32/false
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0f 85/jump-if-!= $compute-offsets:line-loop/disp32
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$compute-offsets:case-comment:
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0f 85/jump-if-!= $compute-addresses:line-loop/disp32
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$compute-addresses:case-comment:
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# if slice-starts-with?(word-slice, "#") break
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# . . push args
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68/push "#"/imm32
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@ -599,8 +599,8 @@ $compute-offsets:case-comment:
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# . if (eax != false) break
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3d/compare-eax-and 0/imm32/false
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0f 85/jump-if-!= $compute-offsets:line-loop/disp32
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$compute-offsets:case-segment-header:
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0f 85/jump-if-!= $compute-addresses:line-loop/disp32
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$compute-addresses:case-segment-header:
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# if !slice-equal?(word-slice, "==") goto next case
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# . eax = slice-equal?(word-slice, "==")
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# . . push args
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@ -612,7 +612,7 @@ $compute-offsets:case-segment-header:
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# . if (eax != false) break
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3d/compare-eax-and 0/imm32/false
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0f 84/jump-if-= $compute-offsets:case-label/disp32
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0f 84/jump-if-= $compute-addresses:case-label/disp32
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# next-word(line, word-slice)
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# . . push args
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52/push-edx
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@ -631,7 +631,7 @@ $compute-offsets:case-segment-header:
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
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# . if (eax != false) abort
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3d/compare-eax-and 0/imm32/false
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0f 85/jump-if-!= $compute-offsets:abort/disp32
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0f 85/jump-if-!= $compute-addresses:abort/disp32
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# next-word(line, word-slice)
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# . . push args
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52/push-edx
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@ -650,7 +650,7 @@ $compute-offsets:case-segment-header:
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
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# . if (eax != false) break
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3d/compare-eax-and 0/imm32/false
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0f 85/jump-if-!= $compute-offsets:line-loop/disp32
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0f 85/jump-if-!= $compute-addresses:line-loop/disp32
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# var new-address/eax: int = parse-hex-int-from-slice(word-slice)
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# . . push args
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52/push-edx
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@ -660,12 +660,12 @@ $compute-offsets:case-segment-header:
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
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# if (new-address < current-address) abort
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39/compare 3/mod/direct 0/rm32/eax . . . 6/r32/esi . . # compare eax with esi
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0f 82/jump-if-addr< $compute-offsets:error-bad-segment-address/disp32
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0f 82/jump-if-addr< $compute-addresses:error-bad-segment-address/disp32
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# current-address = new-address
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89/copy 3/mod/direct 6/rm32/esi . . . 0/r32/eax . . # copy eax to esi
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# break
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e9/jump $compute-offsets:line-loop/disp32
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$compute-offsets:case-label:
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e9/jump $compute-addresses:line-loop/disp32
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$compute-addresses:case-label:
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# if (!label?(word-slice)) goto next case
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# . eax = label?(word-slice)
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# . . push args
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@ -676,7 +676,7 @@ $compute-offsets:case-label:
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
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# . if (eax == false) goto next case
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3d/compare-eax-and 0/imm32/false
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0f 84/jump-if-= $compute-offsets:case-default/disp32
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0f 84/jump-if-= $compute-addresses:case-default/disp32
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# strip trailing ':' from word-slice
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ff 1/subop/decrement 1/mod/*+disp8 2/rm32/edx . . . . 4/disp8 . # decrement *(edx+4)
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# var tmp/eax: (addr int) = get-or-insert-slice(labels, word-slice, row-size=12)
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@ -703,8 +703,8 @@ $compute-offsets:case-label:
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x14/imm32 # add to esp
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# continue
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e9/jump $compute-offsets:word-loop/disp32
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$compute-offsets:case-default:
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e9/jump $compute-addresses:word-loop/disp32
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$compute-addresses:case-default:
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# width/eax = compute-width-of-slice(word-slice)
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# . . push args
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52/push-edx
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@ -733,7 +733,7 @@ $compute-offsets:case-default:
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#? # . write-int32-hex-buffered(Stderr, segment-offset)
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#? # . . push args
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#? 52/push-edx
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#? ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . compute-offsets:segment-offset/disp32 # push *segment-offset
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#? ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . compute-addresses:segment-offset/disp32 # push *segment-offset
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#? 68/push Stderr/imm32
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#? # . . call
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#? e8/call write-int32-hex-buffered/disp32
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@ -755,8 +755,8 @@ $compute-offsets:case-default:
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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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#? # }}}
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e9/jump $compute-offsets:word-loop/disp32
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$compute-offsets:end:
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e9/jump $compute-addresses:word-loop/disp32
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$compute-addresses:end:
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# . reclaim locals
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x214/imm32 # add to esp
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# . restore registers
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@ -771,7 +771,7 @@ $compute-offsets:end:
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5d/pop-to-ebp
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c3/return
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$compute-offsets:abort:
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$compute-addresses:abort:
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# . _write(2/stderr, error)
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# . . push args
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68/push "'==' must be followed by segment name and optionally an address\n"/imm32
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@ -785,7 +785,7 @@ $compute-offsets:abort:
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e8/call syscall_exit/disp32
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# never gets here
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$compute-offsets:error-bad-segment-address:
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$compute-addresses:error-bad-segment-address:
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# . _write(2/stderr, error)
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# . . push args
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68/push "'==' specifies an address that implies negative padding\n"/imm32
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@ -799,7 +799,7 @@ $compute-offsets:error-bad-segment-address:
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e8/call syscall_exit/disp32
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# never gets here
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test-compute-offsets:
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test-compute-addresses:
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# input:
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# == code
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# ab x/imm32 # skip comment
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@ -877,12 +877,12 @@ test-compute-offsets:
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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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# compute-offsets(_test-input-stream, labels)
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# compute-addresses(_test-input-stream, labels)
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# . . push args
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52/push-edx
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68/push _test-input-stream/imm32
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# . . call
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e8/call compute-offsets/disp32
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e8/call compute-addresses/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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#? # dump *Trace-stream {{{
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#? # }}}
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# . check-trace-contains("label 'x' is at address 0x00007c06.", msg)
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# . . push args
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68/push "F - test-compute-offsets"/imm32
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68/push "F - test-compute-addresses"/imm32
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68/push "label 'x' is at address 0x00007c06."/imm32
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# . . call
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e8/call check-trace-contains/disp32
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@ -921,7 +921,7 @@ test-compute-offsets:
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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(labels->write, 0xc, msg)
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# . . push args
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68/push "F - test-compute-offsets-maintains-labels-write-index"/imm32
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68/push "F - test-compute-addresses-maintains-labels-write-index"/imm32
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68/push 0xc/imm32/1-entry
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ff 6/subop/push 0/mod/indirect 2/rm32/edx . . . . . . # push *edx
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# . . call
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