This commit is contained in:
Kartik Agaram
parent
ba93234603
commit
d6c6aebef4
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@ -373,8 +373,8 @@ compute-offsets: # in : (address buffered-file), segments : (address stream {st
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# abort
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# seg = get-or-insert-slice(segments, curr-segment-name)
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# seg->starting-address = parse-hex-int(segment-start)
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# seg->starting-offset = *file-offset
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# trace("segment '", curr-segment-name, "' is at file offset 0x", seg->starting-offset)
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# seg->file-offset = *file-offset
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# trace("segment '", curr-segment-name, "' is at file offset 0x", seg->file-offset)
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# segment-offset = 0
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# else
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# width = compute-width-of-slice(word-slice)
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@ -400,12 +400,15 @@ compute-offsets: # in : (address buffered-file), segments : (address stream {st
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# segment-offset = 0
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b8/copy-to-EAX 0/imm32
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89/copy 0/mod/indirect 5/rm32/.disp32 . . 0/r32/EAX compute-offsets:segment-offset/disp32 # copy EAX to *segment-offset
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# line/ECX = new-stream(heap, 512, 1)
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# line/ECX = new-stream(512, 1)
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# . EAX = new-stream(512, 1)
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# . . push args
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68/push 1/imm32
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68/push 0x200/imm32
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68/push Heap/imm32
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# . . call
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e8/call new-stream/disp32
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# . discard args
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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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# . line/ECX = EAX
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89/copy 3/mod/direct 1/rm32/ECX . . . 0/r32/EAX . . # copy EAX to ECX
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@ -415,18 +418,15 @@ $compute-offsets:line-loop:
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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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# read-line-buffered(in, line/EAX)
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# read-line-buffered(in, line/ECX)
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51/push-ECX
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ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8)
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e8/call read-line-buffered/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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# if(line->write == 0)
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# . EAX = line/ECX->write
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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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# . line->write/EAX == 0 ?
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3d/compare-EAX-and 0/imm32
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# . if so, break
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0f 84/jump-if-equal $compute-offsets:end/disp32
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$compute-offsets:word-loop:
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# var word-slice/EDX = {0, 0}
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@ -512,11 +512,9 @@ $compute-offsets:segment:
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e8/call slice-equal?/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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# . EAX == 0 ?
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# . if (EAX == 0) goto next check
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3d/compare-EAX-and 0/imm32
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# . if so, goto else
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0f 84/jump-if-equal $compute-offsets:else/disp32
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# . or fallthrough
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# if (curr-segment-name->start == 0) goto construct-next-segment
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8b/copy 0/mod/indirect 5/rm32/.disp32 . . 0/r32/EAX compute-offsets:curr-segment-name/disp32 # copy *curr-segment-name to EAX
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3d/compare-EAX-and 0/imm32
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@ -530,12 +528,12 @@ $compute-offsets:segment:
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e8/call get-or-insert-slice/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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# seg->size/EBX = file-offset - seg->starting-offset
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# seg->size/EBX = file-offset - seg->file-offset
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# . save ECX
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51/push-ECX
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# . EBX = *file-offset
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8b/copy 0/mod/indirect 5/rm32/.disp32 . . 3/r32/EBX compute-offsets:file-offset/disp32 # copy *file-offset to EBX
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# . ECX = seg->starting-offset
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# . ECX = seg->file-offset
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8b/copy 1/mod/*+disp8 0/rm32/EAX . . . 1/r32/ECX 4/disp8 . # copy *(EAX+4) to ECX
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# . EBX -= ECX
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29/subtract 3/mod/direct 3/rm32/EBX . . . 1/r32/ECX . . # subtract ECX from EBX
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@ -543,16 +541,16 @@ $compute-offsets:segment:
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89/copy 1/mod/*+disp8 0/rm32/EAX . . . 3/r32/EBX 8/disp8 . # copy EBX to *(EAX+8)
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# . restore ECX
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59/pop-to-ECX
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# trace-slsns("segment '", curr-segment-name, "' has size 0x", seg->size/EBX, "")
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# . push args
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# trace-slsns("segment '", curr-segment-name, "' has size 0x", seg->size/EBX, ".")
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# . . push args
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68/push "."/imm32
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53/push-EBX
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68/push "' has size "/imm32
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68/push compute-offsets:curr-segment-name/imm32
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68/push "segment '"/imm32
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# . call
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# . . call
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e8/call trace-slsns/disp32
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# . discard args
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x14/imm32 # add to ESP
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$compute-offsets:construct-next-segment:
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# next-word(line/ECX, curr-segment-name)
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@ -606,7 +604,7 @@ $compute-offsets:construct-next-segment:
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81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
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# . seg->address = EAX
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89/copy 0/mod/indirect 3/rm32/EBX . . . 0/r32/EAX . . # copy EAX to *EBX
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# seg->file-offset = *file-offset/EAX
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# seg->file-offset = *file-offset
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# . EAX = *file-offset
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b8/copy-to-EAX compute-offsets:file-offset/imm32
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8b/copy 0/mod/indirect 0/rm32/EAX . . . 0/r32/EAX . . # copy *EAX to EAX
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