diff options
Diffstat (limited to '04b/in03')
| -rw-r--r-- | 04b/in03 | 159 |
1 files changed, 121 insertions, 38 deletions
@@ -4,28 +4,54 @@ D=:global_variables 8C=D ; initialize static_memory_end C=:static_memory_end -; 0x40000 = 256KB for code -D=x440000 +; 0x80000 = 512KB for code +D=x480000 8C=D ; initialize labels_end C=:labels_end D=:labels 8C=D -; open input file - J=:input_filename +I=8S +A=d2 +?I>A:argv_file_names + ; use default input/output filenames + ; open input file + J=:input_filename + I=d0 + syscall x2 + J=A + ?J<0:input_file_error + ; open output file + J=:output_filename + I=x241 + D=x1ed + syscall x2 + J=A + ?J<0:output_file_error + !:second_pass_starting_point +:argv_file_names + ; open input file + J=S + ; argv[1] is at *(rsp+16) + J+=d16 + J=8J I=d0 syscall x2 J=A ?J<0:input_file_error -; open output file - J=:output_filename + ; open output file + J=S + ; argv[2] is at *(rsp+24) + J+=d24 + J=8J I=x241 D=x1ed syscall x2 J=A ?J<0:output_file_error + :second_pass_starting_point ; write ELF header J=d4 @@ -161,15 +187,16 @@ call :string= D=A ?D!0:handle_if -; set delimiter to newline -C=xa - I=:line J=:"function" call :string= D=A ?D!0:handle_function + +; set delimiter to newline +C=xa + I=:line J=:"return\n" call :string= @@ -203,6 +230,7 @@ I=:line !:call_check_loop :call_check_loop_end +!:bad_statement !:read_line @@ -217,6 +245,7 @@ I=:line J=d4 I=:static_memory_end I=8I + I-=x400000 syscall x4d ; seek both files back to start J=d3 @@ -292,15 +321,6 @@ align !:read_line :handle_local - R=I - - ; emit sub rsp, 8 - J=d4 - I=:sub_rsp_8 - D=d7 - syscall x1 - - I=R ; skip ' ' I+=d1 @@ -333,23 +353,36 @@ align ; update :local_variables_end I=:local_variables_end 8I=J + + ; set rsp appropriately + C=:rbp_offset + J=d0 + J-=D + 4C=J + + J=d4 + I=:lea_rsp_[rbp_offset] + D=d7 + syscall x1 + + ; read the next line !:read_line - -:sub_rsp_8 + +:lea_rsp_[rbp_offset] x48 - x81 - xec - x08 - x00 - x00 - x00 + x8d + xa5 +:rbp_offset + reserve d4 align :global_start reserve d8 :global_variable_name reserve d8 +:global_variable_size + reserve d8 :handle_global ; ignore if this is the second pass C=:second_pass @@ -359,6 +392,27 @@ align ; skip ' ' I+=d1 + C=1I + D='9 + ?C>D:global_default_size + ; read specific size of global + call :read_number + D=A + C=:global_variable_size + 8C=D + ; check and skip space after number + C=1I + D=x20 + ?C!D:bad_number + I+=d1 + !:global_cont + :global_default_size + ; default size = 8 + C=:global_variable_size + D=d8 + 8C=D + :global_cont + ; store away pointer to variable name C=:global_variable_name 8C=I @@ -380,8 +434,11 @@ align C=4D 4J=C J+=d4 - ; increase static_memory_end - C+=d8 + ; increase static_memory_end by size + D=:global_variable_size + D=8D + C+=D + D=:static_memory_end 4D=C ; store null terminator 1J=0 @@ -392,6 +449,12 @@ align !:read_line :handle_function + I=:line + ; length of "function " + I+=d9 + ; make function name a label + call :add_label + ; emit prologue J=d4 I=:function_prologue @@ -450,14 +513,25 @@ align ; total length = 15 bytes :handle_label_definition + I=:line + I+=d1 + call :add_label + !:read_line + +align +:label_name + reserve d8 +; add the label in rsi to the label list (with the current pc address) +:add_label ; ignore if this is the second pass C=:second_pass C=1C - ?C!0:read_line + ?C!0:return_0 + + C=:label_name + 8C=I ; make sure label only has identifier characters - I=:line - I+=d1 :label_checking_loop C=1I D=xa @@ -470,8 +544,8 @@ align !:bad_label :label_checking_loop_end - I=:line - I+=d1 + C=:label_name + I=8C J=:labels call :ident_lookup C=A @@ -479,8 +553,8 @@ align J=:labels_end J=8J - I=:line - I+=d1 + C=:label_name + I=8C call :ident_copy R=J @@ -500,8 +574,7 @@ align C=:labels_end 8C=J - ; read the next line - !:read_line + return :handle_goto J=d4 @@ -2004,6 +2077,15 @@ align xa x0 +:bad_statement + B=:bad_statement_error_message + !:program_error + +:bad_statement_error_message + str Bad statement. + xa + x0 + :bad_jump B=:bad_jump_error_message !:program_error @@ -2205,6 +2287,7 @@ align 1J=D J-=d1 ?I!0:eputn_loop + J+=d1 D=S D-=J I=J @@ -2271,7 +2354,7 @@ align x20 :"function" str function - xa + x20 :"==" str == x20 |