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| author | Leo Tenenbaum <pommicket@gmail.com> | 2021-11-20 11:38:34 -0500 |
|---|---|---|
| committer | Leo Tenenbaum <pommicket@gmail.com> | 2021-11-20 11:38:34 -0500 |
| commit | d74db670118dc4afdf9e6ecf01432aea4bc1ad39 (patch) | |
| tree | a9123e53e6d874d7cc4fd3b1edd5d845708e4449 /04b/in03 | |
| parent | dfd06106983d7a512f0e8aa3da2084f85f2261e5 (diff) | |
label definitions?
Diffstat (limited to '04b/in03')
| -rw-r--r-- | 04b/in03 | 81 |
1 files changed, 75 insertions, 6 deletions
@@ -5,6 +5,11 @@ D=:global_variables ; initialize static_memory_end C=:static_memory_end D=x500000 +8C=D +; initialize labels_end +C=:labels_end +D=:labels +8C=D I=8S A=d3 @@ -104,6 +109,9 @@ D=1C C=xa ?C=D:read_line +C=': +?C=D:handle_label_definition + I=:line J=:"global" C=x20 @@ -245,6 +253,49 @@ D=A :mov_rbp_rsp R=S +:handle_label_definition + ; make sure label only has identifier characters + I=:line + I+=d1 + :label_checking_loop + C=1I + D=xa + ?C=D:label_checking_loop_end + I+=d1 + B=C + call :isident + D=A + ?D!0:label_checking_loop + !:bad_label + :label_checking_loop_end + + ; @TODO: check if already exists + + J=:labels_end + J=8J + I=:line + I+=d1 + call :ident_copy + R=J + + J=d4 + I=d0 + D=d1 + syscall x8 + C=A + C+=x400000 + J=R + 4J=C + J+=d4 + + ; update labels_end + C=:labels_end + 8C=J + + ; read the next line + !:read_line + + :handle_return ; @TODO: handle argument @@ -280,16 +331,15 @@ D=A :ident_loop C=1I + 1J=C + I+=d1 + J+=d1 D=xa ?C=D:ident_loop_end B=C call :isident D=A ?D=0:bad_identifier - C=1I - 1J=C - I+=d1 - J+=d1 !:ident_loop :ident_loop_end return @@ -397,6 +447,15 @@ D=A str Bad identifier. xa x0 + +:bad_label + B=:bad_label_error_message + !:program_error + +:bad_label_error_message + str Bad label. + xa + x0 :bad_type B=:bad_type_error_message @@ -577,7 +636,15 @@ D=A J+=d1 D-=d1 !:memcpy - + +; copy from rdi to rsi, until byte cl is reached +:memccpy + D=1I + 1J=D + I+=d1 + J+=d1 + ?D!C:memccpy + return :"char" str char @@ -623,13 +690,15 @@ align reserve d8 :stack_end reserve d8 +:labels_end + reserve d8 :line_number reserve d8 :global_variables reserve d50000 :local_variables reserve d20000 -:label_table +:labels reserve d200000 :ELF_header |