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annotate lwasm/struct.c @ 100:7ce01324e391

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Added tag lwtools-4.2 for changeset 1cb23a4e1e7d
author lost@l-w.ca
date Sat, 06 Aug 2011 10:51:33 -0600
parents ccaecdff3fc2
children 211fc8038b8d
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1 /*
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2 struct.c
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3 Copyright © 2010 William Astle
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4
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5 This file is part of LWASM.
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6
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7 LWASM is free software: you can redistribute it and/or modify it under the
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8 terms of the GNU General Public License as published by the Free Software
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9 Foundation, either version 3 of the License, or (at your option) any later
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10 version.
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11
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12 This program is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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15 more details.
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16
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17 You should have received a copy of the GNU General Public License along with
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18 this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 Contains stuff associated with structure processing
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21 */
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22
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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 PARSEFUNC(pseudo_parse_struct)
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32 {
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33 structtab_t *s;
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34
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35 if (as -> instruct)
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36 {
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37 lwasm_register_error(as, l, "Attempt to define a structure inside a structure");
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38 return;
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39 }
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40
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41 if (l -> sym == NULL)
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42 {
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43 lwasm_register_error(as, l, "Structure definition with no effect - no symbol");
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44 return;
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45 }
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46
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47 for (s = as -> structs; s; s = s -> next)
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48 {
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49 if (!strcmp(s -> name, l -> sym))
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50 break;
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51 }
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52
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53 if (s)
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54 {
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55 lwasm_register_error(as, l, "Duplicate structure definition");
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56 return;
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57 }
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58
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59 as -> instruct = 1;
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60
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61 s = lw_alloc(sizeof(structtab_t));
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62 s -> name = lw_strdup(l -> sym);
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63 s -> next = as -> structs;
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64 s -> fields = NULL;
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65 s -> size = 0;
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66 as -> structs = s;
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67 as -> cstruct = s;
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68
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69 skip_operand(p);
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70
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71 l -> len = 0;
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72 l -> symset = 1;
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73
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74 // save current assembly address and initialize to 0
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75 as -> savedaddr = l -> addr;
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76 l -> addr = lw_expr_build(lw_expr_type_int, 0);
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77 }
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78
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79 static void instantiate_struct(asmstate_t *as, line_t *l, structtab_t *s, char *pref, lw_expr_t baseaddr)
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80 {
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81 int len;
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82 char *t;
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83 int plen;
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84 int addr = 0;
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85 lw_expr_t te, te2;
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86 structtab_field_t *e;
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87
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88 if (baseaddr == NULL)
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89 baseaddr = l -> addr;
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90
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91 plen = strlen(pref);
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92 for (e = s -> fields; e; e = e -> next)
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93 {
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94 if (e -> name)
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95 {
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96 len = plen + strlen(e -> name) + 1;
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97 t = lw_alloc(len + 1);
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98 sprintf(t, "%s.%s", pref, e -> name);
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99 }
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100 else
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101 {
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102 len = plen + 30;
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103 t = lw_alloc(len + 1);
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104 sprintf(t, "%s.____%d", pref, addr);
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105 }
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106
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107 te = lw_expr_build(lw_expr_type_int, addr);
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108 te2 = lw_expr_build(lw_expr_type_oper, lw_expr_oper_plus, te, baseaddr);
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109 register_symbol(as, l, t, te2, symbol_flag_nocheck);
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110 lw_expr_destroy(te);
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111
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112 if (e -> substruct)
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113 {
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114 instantiate_struct(as, l, e -> substruct, t, te2);
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115 }
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116
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117 lw_expr_destroy(te2);
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118
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119 lw_free(t);
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120 addr += e -> size;
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121 }
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122
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123 /* register the "sizeof" symbol */
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124 len = plen + 8;
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125 t = lw_alloc(len + 1);
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126 sprintf(t, "sizeof{%s}", pref);
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127 te = lw_expr_build(lw_expr_type_int, s -> size);
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128 register_symbol(as, l, t, te, symbol_flag_nocheck);
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129 lw_expr_destroy(te);
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130 lw_free(t);
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131 }
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132
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133
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134 PARSEFUNC(pseudo_parse_endstruct)
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135 {
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136 lw_expr_t te;
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137
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138 if (as -> instruct == 0)
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139 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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140 lwasm_register_warning(as, l, "endstruct without struct");
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141 skip_operand(p);
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142 return;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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143 }
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127e5b1e01c0 Removed use of asprintf() and added Makefile options for cross compiling; also a bugfix with sizeof{} in lwasm
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144
61
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145 te = lw_expr_build(lw_expr_type_int, 0);
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146
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147 // make all the relevant generic struct symbols
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148 instantiate_struct(as, l, as -> cstruct, as -> cstruct -> name, te);
0
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149 lw_expr_destroy(te);
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150
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151 l -> soff = as -> cstruct -> size;
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152 as -> instruct = 0;
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153
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154 skip_operand(p);
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155
61
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156 lw_expr_destroy(l -> addr);
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157 l -> addr = as -> savedaddr;
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158 as -> savedaddr = NULL;
0
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159
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160 l -> len = 0;
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161 }
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162
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163 void register_struct_entry(asmstate_t *as, line_t *l, int size, structtab_t *ss)
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164 {
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165 structtab_field_t *e, *e2;
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166
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167 l -> soff = as -> cstruct -> size;
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168 e = lw_alloc(sizeof(structtab_field_t));
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169 e -> next = NULL;
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170 e -> size = size;
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171 if (l -> sym)
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172 e -> name = lw_strdup(l -> sym);
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173 else
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174 e -> name = NULL;
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175 e -> substruct = ss;
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176 if (as -> cstruct -> fields)
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177 {
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178 for (e2 = as -> cstruct -> fields; e2 -> next; e2 = e2 -> next)
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179 /* do nothing */ ;
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180 e2 -> next = e;
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181 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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182 else
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183 {
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184 as -> cstruct -> fields = e;
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185 }
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186 as -> cstruct -> size += size;
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187 }
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188
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189 int expand_struct(asmstate_t *as, line_t *l, char **p, char *opc)
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190 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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191 structtab_t *s;
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127e5b1e01c0 Removed use of asprintf() and added Makefile options for cross compiling; also a bugfix with sizeof{} in lwasm
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192
0
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193 debug_message(as, 200, "Checking for structure expansion: %s", opc);
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194
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195 for (s = as -> structs; s; s = s -> next)
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196 {
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197 if (!strcmp(opc, s -> name))
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198 break;
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199 }
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200
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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201 if (!s)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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202 return -1;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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203
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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204 debug_message(as, 10, "Expanding structure: %s", opc);
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205
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206 if (!(l -> sym))
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207 {
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208 lwasm_register_error(as, l, "Cannot declare a structure without a symbol name.");
2
7317fbe024af Clean up insane number of compiler warnings under -Wall
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209 return -1;
0
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210 }
47
1d6a31a2586b Fixed multiple symbol error with nested structs
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diff changeset
211
0
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212 l -> len = s -> size;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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213
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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214 if (as -> instruct)
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127e5b1e01c0 Removed use of asprintf() and added Makefile options for cross compiling; also a bugfix with sizeof{} in lwasm
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215 {
61
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216 /* register substruct here */
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217 register_struct_entry(as, l, s -> size, s);
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218 /* mark the symbol consumed */
ccaecdff3fc2 Make structure definitions not affect current assembly address and fix up cosmetic offset display in listings
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219 l -> symset = 1;
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220 l -> len = 0;
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221 return 0;
10
127e5b1e01c0 Removed use of asprintf() and added Makefile options for cross compiling; also a bugfix with sizeof{} in lwasm
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222 }
0
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223 else
10
127e5b1e01c0 Removed use of asprintf() and added Makefile options for cross compiling; also a bugfix with sizeof{} in lwasm
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diff changeset
224 {
61
ccaecdff3fc2 Make structure definitions not affect current assembly address and fix up cosmetic offset display in listings
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diff changeset
225 /* instantiate the struct here */
ccaecdff3fc2 Make structure definitions not affect current assembly address and fix up cosmetic offset display in listings
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226 instantiate_struct(as, l, s, l -> sym, NULL);
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227 return 0;
10
127e5b1e01c0 Removed use of asprintf() and added Makefile options for cross compiling; also a bugfix with sizeof{} in lwasm
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228 }
0
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229
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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230 return 0;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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231 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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232