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Move version header into a common direction to better reflect what it is. The version header isn't really associated with lwlib itself since that is intended to be some generic type routines that can be used by other programs. It is, however, directly associated with lwtools. Thus, it should be related to lwtools itself rather than the more generic lwlib.
author William Astle <lost@l-w.ca>
date Thu, 01 Mar 2018 21:25:51 -0700
parents 8764142b3192
children
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1 /*
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2 pass2.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 pass 2: deal with undefined symbols and do a simplification pass
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33 on all the expressions. Handle PRAGMA_IMPORTUNDEFEXPORT
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34
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35 */
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36 void do_pass2(asmstate_t *as)
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37 {
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38 line_t *cl;
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39 exportlist_t *ex;
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40 struct symtabe *s;
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41 importlist_t *im;
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42 struct line_expr_s *le;
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43
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44 // verify the export list
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45 if (as -> output_format == OUTPUT_OBJ)
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46 {
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47 for (ex = as -> exportlist; ex; ex = ex -> next)
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48 {
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49 s = lookup_symbol(as, NULL, ex -> symbol);
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50 if (!s)
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51 {
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52 if (CURPRAGMA(ex -> line, PRAGMA_IMPORTUNDEFEXPORT))
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53 {
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54 for (im = as -> importlist; im; im = im -> next)
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55 {
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56 if (!strcmp(ex -> symbol, im -> symbol))
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57 break;
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58 }
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59 if (!im)
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60 {
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61 im = lw_alloc(sizeof(importlist_t));
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62 im -> symbol = lw_strdup(ex -> symbol);
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63 im -> next = as -> importlist;
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64 as -> importlist = im;
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65 }
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66 }
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67 else
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68 {
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69 // undefined export - register error
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70 lwasm_register_error(as, ex->line, E_SYMBOL_UNDEFINED_EXPORT);
0
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71 }
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72 }
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73 ex -> se = s;
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74 }
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75 if (as -> errorcount > 0)
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76 return;
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77 }
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78
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79 // we want to throw errors on undefined symbols here
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80 as -> badsymerr = 1;
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81
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82 // now do some reductions on expressions
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83 for (cl = as -> line_head; cl; cl = cl -> next)
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84 {
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85 as -> cl = cl;
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86
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87 // simplify address
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88 lwasm_reduce_expr(as, cl -> addr);
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89
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90 // simplify data address
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91 lwasm_reduce_expr(as, cl -> daddr);
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92
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93 // simplify each expression
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94 for (le = cl -> exprs; le; le = le -> next)
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95 lwasm_reduce_expr(as, le -> expr);
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96 }
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97 }