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Various bugfixes and output tuning Tuned output of preprocessor to include line markers similar to the ones added by the gcc preprocessor. Also, many fixes for various bits of dumbosity leading to misbehaviour and crashing.
author William Astle <lost@l-w.ca>
date Wed, 18 Sep 2013 19:17:52 -0600
parents 02804b7c051c
children 8764142b3192
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
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1 /*
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2 pass6.c
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3
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4 Copyright © 2010 William Astle
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5
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6 This file is part of LWTOOLS.
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7
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8 LWTOOLS is free software: you can redistribute it and/or modify it under the
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9 terms of the GNU General Public License as published by the Free Software
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10 Foundation, either version 3 of the License, or (at your option) any later
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11 version.
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12
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13 This program is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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16 more details.
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17
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18 You should have received a copy of the GNU General Public License along with
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19 this program. If not, see <http://www.gnu.org/licenses/>.
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20 */
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21
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22 #include <stdio.h>
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23 #include <string.h>
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24
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25 #include <lw_alloc.h>
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26 #include <lw_string.h>
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27
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28 #include "lwasm.h"
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29 #include "instab.h"
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30
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31 /*
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32 Finalize Pass
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33
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34 Reduce all expressions in a final pass.
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35
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36 Observation:
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37
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38 Everything should reduce as far as it is going to in a single pass
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39 because all line addresses are now constant (or section-base offset)
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40 */
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41
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42 static int exprok_aux(lw_expr_t e, void *priv)
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43 {
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44 asmstate_t *as = priv;
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45
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46 if (lw_expr_istype(e, lw_expr_type_int))
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47 return 0;
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48
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49 if (as -> output_format == OUTPUT_OBJ)
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50 {
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51 if (lw_expr_istype(e, lw_expr_type_oper))
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52 return 0;
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53 if (lw_expr_istype(e, lw_expr_type_special) && as -> output_format == OUTPUT_OBJ)
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54 {
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55 int t;
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56 t = lw_expr_specint(e);
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57 if (t == lwasm_expr_secbase || t == lwasm_expr_syment || t == lwasm_expr_import)
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58 return 0;
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59 }
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60 }
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61
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62 return 1;
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63 }
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64
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65 static int exprok(asmstate_t *as, lw_expr_t e)
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66 {
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67 if (lw_expr_testterms(e, exprok_aux, as))
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68 return 0;
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69 return 1;
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70 }
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72
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73 void do_pass6(asmstate_t *as)
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74 {
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75 line_t *cl;
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76 struct line_expr_s *le;
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77
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78 for (cl = as -> line_head; cl; cl = cl -> next)
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79 {
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80 as -> cl = cl;
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81 for (le = cl -> exprs; le; le = le -> next)
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82 {
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83 lwasm_reduce_expr(as, le -> expr);
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84 if (!exprok(as, le -> expr))
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85 {
160
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86 lwasm_register_error(as, cl, "Invalid expression: %s", lw_expr_print(le -> expr));
0
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87 }
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88 }
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89 }
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90 }