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| author | Kartik Agaram <vc@akkartik.com> | 2019-02-14 16:24:20 -0800 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2019-02-14 16:24:20 -0800 |
| commit | 1639687ba098aa81b0584f7dd609cb9690dc5a04 (patch) | |
| tree | 1a5ee40c30bf906c6ba5e55b8c5138a467022105 /subx/056trace.subx | |
| parent | 1ab48a69ccfa4ddaa2e1fa803ea6fe568b890abc (diff) | |
| download | mu-1639687ba098aa81b0584f7dd609cb9690dc5a04.tar.gz | |
4961
Diffstat (limited to 'subx/056trace.subx')
| -rw-r--r-- | subx/056trace.subx | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/subx/056trace.subx b/subx/056trace.subx index 96e5646b..aa73bbdd 100644 --- a/subx/056trace.subx +++ b/subx/056trace.subx @@ -99,7 +99,7 @@ trace: # t : (address trace-stream), line : string e8/call _append-3/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP - # if EAX == 0 return + # if (EAX == 0) return 81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0/imm32 # compare EDX 74/jump-if-equal $trace:end/disp8 # t->write += EAX @@ -153,9 +153,8 @@ clear-trace-stream: # t : (address trace-stream) c7 0/subop/copy 1/mod/*+disp8 0/rm32/EAX . . . . 4/disp8 0/imm32 # copy to *(EAX+4) # EAX = t->data 81 0/subop/add 3/mod/direct 0/rm32/EAX . . . . . 0xc/imm32 # add to EAX - # while (true) $clear-trace-stream:loop: - # if EAX >= ECX break + # if (EAX >= ECX) break 39/compare 3/mod/direct 0/rm32/EAX . . . 1/r32/ECX . . # compare EAX with ECX 7d/jump-if-greater-or-equal $clear-trace-stream:end/disp8 # *EAX = 0 @@ -328,18 +327,20 @@ _append-4: # out : address, outend : address, in : address, inend : address -> # ECX = inend 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 1/r32/ECX 0x14/disp8 . # copy *(EBP+20) to ECX $_append-4:loop: - # if ESI/in >= ECX/inend break + # if (in >= inend) break 39/compare 3/mod/direct 6/rm32/ESI . . . 1/r32/ECX . . # compare ESI with ECX 7d/jump-if-greater-or-equal $_append-4:end/disp8 - # if EDI/out >= EDX/outend break (for now silently ignore filled up buffer) + # if (out >= outend) break # for now silently ignore filled up buffer 39/compare 3/mod/direct 7/rm32/EDI . . . 2/r32/EDX . . # compare EDI with EDX 7d/jump-if-greater-or-equal $_append-4:end/disp8 - # copy one byte from ESI/in to EDI/out + # *out = *in 8a/copy-byte 0/mod/indirect 6/rm32/ESI . . . 3/r32/BL . . # copy byte at *ESI to BL 88/copy-byte 0/mod/indirect 7/rm32/EDI . . . 3/r32/BL . . # copy byte at BL to *EDI - # updates + # ++num_bytes_appended 40/increment-EAX + # ++in 46/increment-ESI + # ++out 47/increment-EDI eb/jump $_append-4:loop/disp8 $_append-4:end: |