Mercurial > hg-old > index.cgi
annotate lwasm/pseudo.c @ 232:1009f302ac11
Documented the "Flags" term for object files
author | lost |
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date | Fri, 12 Jun 2009 04:17:22 +0000 |
parents | 59a138df0401 |
children | aa0056ca7319 |
rev | line source |
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0 | 1 /* |
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2 pseudo.c |
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3 Copyright © 2009 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 |
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21 This file implements the various pseudo operations. |
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22 */ |
212 | 23 #include <config.h> |
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24 #include <errno.h> |
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25 #include <stdio.h> |
0 | 26 #include <stdlib.h> |
50 | 27 #include <string.h> |
0 | 28 #include "lwasm.h" |
29 #include "instab.h" | |
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30 #include "expr.h" |
52 | 31 #include "util.h" |
0 | 32 |
52 | 33 extern int lwasm_read_file(asmstate_t *as, const char *filename); |
0 | 34 |
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35 OPFUNC(pseudo_noop) |
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36 { |
229 | 37 skip_operand(p); |
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38 } |
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39 |
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40 OPFUNC(pseudo_org) |
0 | 41 { |
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42 int v, r; |
52 | 43 |
74 | 44 if (as -> csect) |
45 { | |
46 register_error(as, l, 1, "ORG not allowed within sections"); | |
47 return; | |
48 } | |
49 | |
52 | 50 if (as -> passnum != 1) |
51 { | |
52 // org is not needed to be processed on pass 2 | |
53 // this will prevent phasing errors for forward references that | |
54 // resolve on the second pass | |
55 // we saved the org address in l -> codeaddr on pass 1 | |
56 as -> addr = l -> codeaddr; | |
229 | 57 skip_operand(p); |
52 | 58 return; |
59 } | |
0 | 60 |
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61 if (l -> sym) |
0 | 62 { |
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63 register_error(as, l, 1, "No symbol allowed with ORG"); |
0 | 64 } |
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65 |
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66 r = lwasm_expr_result2(as, l, p, EXPR_PASS1CONST, &v, 0); |
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67 if (r != 0) |
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68 return; |
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69 l -> codeaddr = v; |
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70 l -> addrset = 1; |
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71 as -> addr = v; |
0 | 72 } |
73 | |
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74 /* |
52 | 75 The operand for include is a string optionally enclosed in " |
76 */ | |
77 OPFUNC(pseudo_include) | |
0 | 78 { |
79 int v1; | |
52 | 80 char *fn; |
57 | 81 |
52 | 82 // only include files on pass 1 |
83 // but make sure local include context is right | |
84 // for the next line... | |
0 | 85 if (as -> passnum != 1) |
52 | 86 { |
57 | 87 as -> context = lwasm_next_context(as); |
229 | 88 skip_operand(p); |
0 | 89 return; |
52 | 90 } |
91 | |
92 while (**p && isspace(**p)) | |
93 (*p)++; | |
94 | |
95 if (!**p) | |
0 | 96 { |
52 | 97 register_error(as, l, 1, "Bad file name"); |
0 | 98 return; |
99 } | |
52 | 100 |
101 if (**p == '"') | |
102 { | |
103 // search for ending " | |
104 (*p)++; | |
105 for (v1 = 0; *((*p)+v1) && *((*p)+v1) != '"'; v1++) | |
106 /* do nothing */ ; | |
107 if (*((*p)+v1) != '"') | |
108 { | |
109 register_error(as, l, 1, "Bad file name"); | |
110 return; | |
111 } | |
112 } | |
113 else | |
0 | 114 { |
52 | 115 // search for a space type character |
116 for (v1 = 0; *((*p)+v1) && !isspace(*((*p)+v1)); v1++) | |
117 ; | |
0 | 118 } |
52 | 119 |
120 fn = lwasm_alloc(v1 + 1); | |
121 memcpy(fn, *p, v1); | |
122 fn[v1] = '\0'; | |
123 | |
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124 (*p) += v1; |
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125 if (**p == '"') |
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126 (*p)++; |
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127 |
52 | 128 // end local label context on include |
57 | 129 as -> context = lwasm_next_context(as); |
52 | 130 if (lwasm_read_file(as, fn) < 0) |
131 { | |
132 register_error(as, l, 1, "File include error (%s)", fn); | |
133 } | |
134 lwasm_free(fn); | |
0 | 135 } |
136 | |
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137 /* |
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138 The operand for includebin is a string optionally enclosed in " |
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139 */ |
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140 OPFUNC(pseudo_includebin) |
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141 { |
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142 int v1; |
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143 char *fn; |
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144 FILE *f; |
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145 |
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146 // only include files on pass 1 |
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147 while (**p && isspace(**p)) |
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148 (*p)++; |
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149 |
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150 if (!**p) |
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151 { |
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152 register_error(as, l, 1, "Bad file name"); |
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153 return; |
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154 } |
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155 |
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156 if (**p == '"') |
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157 { |
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158 // search for ending " |
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159 (*p)++; |
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160 for (v1 = 0; *((*p)+v1) && *((*p)+v1) != '"'; v1++) |
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161 /* do nothing */ ; |
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162 if (*((*p)+v1) != '"') |
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163 { |
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164 register_error(as, l, 1, "Bad file name"); |
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165 return; |
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166 } |
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167 } |
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168 else |
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169 { |
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170 // search for a space type character |
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171 for (v1 = 0; *((*p)+v1) && !isspace(*((*p)+v1)); v1++) |
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172 ; |
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173 } |
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174 |
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175 fn = lwasm_alloc(v1 + 1); |
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176 memcpy(fn, *p, v1); |
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177 fn[v1] = '\0'; |
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178 |
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179 (*p) += v1; |
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180 if (**p == '"') |
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181 (*p)++; |
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182 |
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183 // open the file |
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184 f = fopen(fn, "rb"); |
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185 if (!f) |
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186 { |
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187 register_error(as, l, 1, "Cannot open file: %s", strerror(errno)); |
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188 register_error(as, l, 2, "Cannot open file: %s", strerror(errno)); |
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189 } |
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190 |
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191 // don't need fn any more |
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192 lwasm_free(fn); |
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193 |
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194 // read the contents of the file and "emit()" it |
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195 while (!feof(f) && !ferror(f)) |
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196 { |
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197 v1 = fgetc(f); |
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198 if (v1 == EOF) |
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199 break; |
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200 lwasm_emit(as, l, v1); |
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201 } |
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202 // close file |
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203 fclose(f); |
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204 } |
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205 |
50 | 206 OPFUNC(pseudo_rmb) |
0 | 207 { |
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208 int r, v; |
0 | 209 |
95 | 210 if (as -> passnum == 2) |
0 | 211 { |
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212 as -> addr += l -> nocodelen; |
229 | 213 skip_operand(p); |
0 | 214 return; |
215 } | |
103 | 216 r = lwasm_expr_result2(as, l, p, EXPR_SECTCONST | EXPR_PASS1CONST, &v, -1); |
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217 if (r != 0) |
0 | 218 return; |
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219 l -> nocodelen = v; |
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220 as -> addr += v; |
0 | 221 } |
53 | 222 |
223 OPFUNC(pseudo_rmd) | |
0 | 224 { |
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225 int r, v; |
0 | 226 |
95 | 227 if (as -> passnum == 2) |
0 | 228 { |
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229 as -> addr += l -> nocodelen; |
229 | 230 skip_operand(p); |
0 | 231 return; |
232 } | |
103 | 233 r = lwasm_expr_result2(as, l, p, EXPR_SECTCONST | EXPR_PASS1CONST, &v, 0); |
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234 if (r != 0) |
0 | 235 return; |
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236 v *= 2; |
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237 l -> nocodelen = v; |
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238 as -> addr += v; |
0 | 239 } |
240 | |
53 | 241 OPFUNC(pseudo_rmq) |
0 | 242 { |
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243 int r, v; |
0 | 244 |
95 | 245 if (as -> passnum == 2) |
0 | 246 { |
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247 as -> addr += l -> nocodelen; |
229 | 248 skip_operand(p); |
0 | 249 return; |
250 } | |
103 | 251 r = lwasm_expr_result2(as, l, p, EXPR_SECTCONST | EXPR_PASS1CONST, &v, 0); |
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252 if (r != 0) |
0 | 253 return; |
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254 v *= 4; |
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255 l -> nocodelen = v; |
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256 as -> addr += v; |
0 | 257 } |
258 | |
53 | 259 OPFUNC(pseudo_zmb) |
0 | 260 { |
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261 int r, v; |
0 | 262 |
103 | 263 r = lwasm_expr_result2(as, l, p, EXPR_SECTCONST | EXPR_PASS1CONST, &v, 0); |
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264 if (r != 0) |
0 | 265 return; |
78
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266 while (v--) |
53 | 267 lwasm_emit(as, l, 0); |
0 | 268 } |
269 | |
53 | 270 OPFUNC(pseudo_zmd) |
0 | 271 { |
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272 int r, v; |
0 | 273 |
103 | 274 r = lwasm_expr_result2(as, l, p, EXPR_SECTCONST | EXPR_PASS1CONST, &v, 0); |
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275 if (r != 0) |
0 | 276 return; |
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277 v *= 2; |
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278 while (v--) |
53 | 279 lwasm_emit(as, l, 0); |
0 | 280 } |
281 | |
53 | 282 OPFUNC(pseudo_zmq) |
283 { | |
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284 int r, v; |
53 | 285 |
103 | 286 r = lwasm_expr_result2(as, l, p, EXPR_SECTCONST | EXPR_PASS1CONST, &v, 0); |
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287 if (r != 0) |
53 | 288 return; |
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289 v *= 4; |
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290 while (v--) |
53 | 291 lwasm_emit(as, l, 0); |
292 } | |
293 | |
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294 OPFUNC(pseudo_end) |
0 | 295 { |
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296 int r, v; |
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297 lwasm_expr_stack_t *s; |
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298 |
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299 |
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300 as -> endseen = 1; |
0 | 301 |
54
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302 // address only matters for DECB output |
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303 if (as -> outformat != OUTPUT_DECB) |
229 | 304 { |
305 skip_operand(p); | |
54
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306 return; |
229 | 307 } |
54
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308 |
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309 r = lwasm_expr_result2(as, l, p, 0, &v, 0); |
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310 if (r != 0) |
0 | 311 { |
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312 register_error(as, l, 2, "Bad operand"); |
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313 } |
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314 |
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315 v = v & 0xffff; |
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316 if (as -> passnum == 2) |
0 | 317 { |
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318 as -> execaddr = v; |
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319 l -> symaddr = v; |
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320 l -> addrset = 2; |
0 | 321 } |
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322 } |
0 | 323 |
56 | 324 |
325 OPFUNC(pseudo_align) | |
0 | 326 { |
327 int cn; | |
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328 int r, v; |
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329 |
56 | 330 if (as -> passnum == 2) |
0 | 331 { |
229 | 332 skip_operand(p); |
56 | 333 while (as -> addr < l -> symaddr) |
334 lwasm_emit(as, l, 0); | |
335 return; | |
336 } | |
337 | |
103 | 338 r = lwasm_expr_result2(as, l, p, EXPR_SECTCONST | EXPR_PASS1CONST, &v, 0); |
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339 if (r != 0) |
56 | 340 { |
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341 l -> symaddr = as -> addr; |
0 | 342 return; |
343 } | |
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344 |
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345 if (v < 1) |
56 | 346 { |
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347 register_error(as, l, 1, "Illegal alignment %d", v); |
56 | 348 return; |
0 | 349 } |
56 | 350 |
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351 cn = l -> codeaddr % v; |
56 | 352 if (cn) |
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353 cn = v - cn; |
56 | 354 |
355 while (cn--) | |
356 { | |
357 lwasm_emit(as, l, 0); | |
358 } | |
359 l -> symaddr = as -> addr; | |
0 | 360 } |
56 | 361 |
50 | 362 OPFUNC(pseudo_equ) |
0 | 363 { |
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364 int r, v; |
52 | 365 |
50 | 366 if (l -> sym == NULL) |
0 | 367 { |
50 | 368 register_error(as, l, 1, "No symbol specified"); |
0 | 369 return; |
370 } | |
50 | 371 |
103 | 372 r = lwasm_expr_result2(as, l, p, EXPR_SECTCONST | EXPR_PASS1CONST, &v, 0); |
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373 if (r < 0) |
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374 v = 0; |
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375 |
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376 l -> symaddr = v & 0xFFFF; |
50 | 377 l -> addrset = 2; |
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378 |
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379 // note: we need to do this because the symbol might have resolved |
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380 // to a constant! |
190 | 381 lwasm_register_symbol(as, l, l -> sym, v, (r > 0 ? SYMBOL_COMPLEX: SYMBOL_NORM) | SYMBOL_FORCE | (l -> forceglobal ? SYMBOL_GLOBAL : SYMBOL_NORM)); |
0 | 382 } |
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383 |
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384 OPFUNC(pseudo_set) |
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385 { |
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386 int r, v; |
64 | 387 |
388 // set MUST run on both passes as the symbol value changes! | |
389 | |
390 if (l -> sym == NULL) | |
391 { | |
392 register_error(as, l, 1, "No symbol specified"); | |
393 return; | |
394 } | |
395 | |
103 | 396 r = lwasm_expr_result2(as, l, p, EXPR_SECTCONST | EXPR_PASS1CONST, &v, 0); |
79
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397 if (r < 0) |
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398 v = 0; |
64 | 399 |
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400 l -> symaddr = v & 0xFFFF; |
64 | 401 l -> addrset = 2; |
402 | |
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403 lwasm_register_symbol(as, l, l -> sym, v, (r > 0 ? SYMBOL_COMPLEX: SYMBOL_NORM) | SYMBOL_SET); |
63
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404 } |
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405 |
65
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406 OPFUNC(pseudo_setdp) |
0 | 407 { |
79
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408 int r, v; |
0 | 409 |
79
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410 if (as -> outformat == OUTPUT_OBJ) |
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411 { |
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412 register_error(as, l, 1, "SETDP not permitted with OBJ target"); |
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413 return; |
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414 } |
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415 |
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416 // setdp is needed on both passes; must resolve to a constant on pass 1 |
103 | 417 r = lwasm_expr_result2(as, l, p, EXPR_SECTCONST | EXPR_PASS1CONST, &v, 0); |
79
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418 if (r != 0) |
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419 return; |
65
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420 |
79
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421 if (v < -127 || v > 255) |
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422 { |
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423 register_error(as, l, 1, "Byte overflow"); |
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424 return; |
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425 } |
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426 |
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427 l -> symaddr = v & 0xFF; |
65
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428 l -> addrset = 2; |
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429 |
79
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430 as -> dpval = v & 0xFF; |
0 | 431 } |
432 | |
160
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433 // used to get a byte from a string |
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434 // -1 is end of line |
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435 int pseudo_fcc_fetchchar(asmstate_t *as, char **p) |
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436 { |
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437 int c; |
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438 |
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439 // - |
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440 if (!**p) |
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441 return -1; |
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442 |
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443 c = (unsigned char)(**p); |
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444 (*p)++; |
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445 |
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446 if (as -> pragmas & PRAGMA_CESCAPES && c == '\\') |
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447 { |
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448 // decode escapes if needed |
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449 if (!**p) |
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450 return c; |
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451 |
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452 c = **p; |
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453 (*p)++; |
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454 |
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455 switch (c) |
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456 { |
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457 // octal value |
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458 // 1, 2, or 3 digits |
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459 // NOTE: \0 for NUL is included in this... |
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460 case '0': |
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461 case '1': |
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462 case '2': |
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463 case '3': |
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464 case '4': |
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465 case '5': |
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466 case '6': |
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467 case '7': |
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468 c -= '0'; |
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469 if (**p < '0' || **p > '9') |
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470 return c; |
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471 c = c << 3; |
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|
472 c |= **p - '0'; |
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Added cescapes pragma and a few other compatibility pseudo ops
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parents:
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diff
changeset
|
473 (*p)++; |
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Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
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diff
changeset
|
474 if (**p < '0' || **p > '9') |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
475 return c; |
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Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
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diff
changeset
|
476 c = c << 3; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
477 c |= **p - '0'; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
478 (*p)++; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
479 return c; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
480 |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
481 // LF |
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Added cescapes pragma and a few other compatibility pseudo ops
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parents:
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diff
changeset
|
482 case 'n': |
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Added cescapes pragma and a few other compatibility pseudo ops
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parents:
158
diff
changeset
|
483 return 10; |
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Added cescapes pragma and a few other compatibility pseudo ops
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parents:
158
diff
changeset
|
484 |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
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diff
changeset
|
485 // CR |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
486 case 'r': |
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Added cescapes pragma and a few other compatibility pseudo ops
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parents:
158
diff
changeset
|
487 return 13; |
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Added cescapes pragma and a few other compatibility pseudo ops
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parents:
158
diff
changeset
|
488 |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
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parents:
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diff
changeset
|
489 // TAB |
b061350c17e4
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parents:
158
diff
changeset
|
490 case 't': |
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parents:
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diff
changeset
|
491 return 9; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
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parents:
158
diff
changeset
|
492 |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
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parents:
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diff
changeset
|
493 // VT |
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Added cescapes pragma and a few other compatibility pseudo ops
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diff
changeset
|
494 case 'v': |
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Added cescapes pragma and a few other compatibility pseudo ops
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parents:
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diff
changeset
|
495 return 11; |
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parents:
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diff
changeset
|
496 |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
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parents:
158
diff
changeset
|
497 // BS |
b061350c17e4
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158
diff
changeset
|
498 case 'b': |
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diff
changeset
|
499 return 8; |
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Added cescapes pragma and a few other compatibility pseudo ops
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diff
changeset
|
500 |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
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parents:
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diff
changeset
|
501 // FF |
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Added cescapes pragma and a few other compatibility pseudo ops
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parents:
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diff
changeset
|
502 case 'f': |
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parents:
158
diff
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|
503 return 12; |
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parents:
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diff
changeset
|
504 |
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Added cescapes pragma and a few other compatibility pseudo ops
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parents:
158
diff
changeset
|
505 // BEL |
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diff
changeset
|
506 case 'a': |
b061350c17e4
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|
507 return 7; |
b061350c17e4
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parents:
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diff
changeset
|
508 |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
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diff
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|
509 // hex char code (2 chars) |
b061350c17e4
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parents:
158
diff
changeset
|
510 case 'x': |
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parents:
158
diff
changeset
|
511 { |
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Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
512 int c2; |
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parents:
158
diff
changeset
|
513 if (!**p) |
b061350c17e4
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158
diff
changeset
|
514 return 'x'; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
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diff
changeset
|
515 c = toupper(**p); |
b061350c17e4
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parents:
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diff
changeset
|
516 (*p)++; |
b061350c17e4
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parents:
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diff
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|
517 if (c < '0' || (c > '9' && c < 'A') || c > 'F') |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
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parents:
158
diff
changeset
|
518 return 0; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
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parents:
158
diff
changeset
|
519 c -= '0'; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
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parents:
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diff
changeset
|
520 if (c > 9) |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
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parents:
158
diff
changeset
|
521 c -= 7; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
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diff
changeset
|
522 c2 = c << 4; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
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diff
changeset
|
523 if (!**p) |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
524 return 0; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
525 c = toupper(**p); |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
526 (*p)++; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
527 if (c < '0' || (c > '9' && c < 'A') || c > 'F') |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
528 return 0; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
529 c -= '0'; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
530 if (c > 9) |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
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parents:
158
diff
changeset
|
531 c -= 7; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
532 c2 |= c; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
533 return c2; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
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diff
changeset
|
534 } |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
535 // everything else stands for itself as a fall back or legit |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
536 default: |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
537 return c; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
538 } |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
539 } |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
540 return c; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
541 } |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
542 |
56 | 543 OPFUNC(pseudo_fcc) |
544 { | |
0 | 545 int delim = 0; |
160
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
546 int c; |
0 | 547 |
56 | 548 delim = **p; |
0 | 549 if (!delim) |
550 { | |
56 | 551 register_error(as, l, 1, "Bad operand"); |
552 return; | |
0 | 553 } |
56 | 554 *p += 1; |
160
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
555 for (;;) |
0 | 556 { |
160
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
557 c = pseudo_fcc_fetchchar(as, p); |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
558 if (c == delim || c < 0) |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
559 break; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
560 |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
561 lwasm_emit(as, l, c); |
0 | 562 } |
563 } | |
564 | |
56 | 565 |
566 OPFUNC(pseudo_fcs) | |
0 | 567 { |
568 int delim = 0; | |
160
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
569 int c, lc = -1; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
570 |
56 | 571 delim = **p; |
0 | 572 if (!delim) |
573 { | |
56 | 574 register_error(as, l, 1, "Bad operand"); |
575 return; | |
0 | 576 } |
56 | 577 *p += 1; |
160
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
578 for (;;) |
0 | 579 { |
160
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
580 c = pseudo_fcc_fetchchar(as, p); |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
581 if (c == delim || c < 0) |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
582 { |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
583 if (lc >= 0) |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
584 lwasm_emit(as, l, lc | 0x80); |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
585 break; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
586 } |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
587 if (lc >= 0) |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
588 lwasm_emit(as, l, lc); |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
589 lc = c; |
0 | 590 } |
591 } | |
592 | |
56 | 593 OPFUNC(pseudo_fcn) |
0 | 594 { |
595 int delim = 0; | |
160
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
596 int c; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
597 |
56 | 598 delim = **p; |
0 | 599 if (!delim) |
600 { | |
56 | 601 register_error(as, l, 1, "Bad operand"); |
602 return; | |
0 | 603 } |
56 | 604 *p += 1; |
160
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
605 for (;;) |
0 | 606 { |
160
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
607 c = pseudo_fcc_fetchchar(as, p); |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
608 if (c == delim || c < 0) |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
609 break; |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
610 |
b061350c17e4
Added cescapes pragma and a few other compatibility pseudo ops
lost
parents:
158
diff
changeset
|
611 lwasm_emit(as, l, c); |
0 | 612 } |
56 | 613 lwasm_emit(as, l, 0); |
0 | 614 } |
56 | 615 |
616 OPFUNC(pseudo_fcb) | |
0 | 617 { |
79
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
618 int r, v; |
0 | 619 |
620 fcb_again: | |
79
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
621 r = lwasm_expr_result2(as, l, p, 0, &v, -1); |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
622 if (r < 0) |
56 | 623 return; |
79
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
624 |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
625 if (r > 0) |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
626 { |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
627 register_error(as, l, 2, "Illegal external or inter-segment reference"); |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
628 v = 0; |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
629 } |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
630 |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
631 if (v < -127 || v > 255) |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
632 { |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
633 register_error(as, l, 1, "Byte overflow"); |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
634 } |
56 | 635 |
79
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
636 lwasm_emit(as, l, v); |
56 | 637 if (**p == ',') |
0 | 638 { |
56 | 639 (*p)++; |
0 | 640 goto fcb_again; |
641 } | |
642 } | |
643 | |
79
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
644 // FIXME: handle external references in an intelligent way |
56 | 645 OPFUNC(pseudo_fdb) |
0 | 646 { |
79
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
647 int r, v; |
103 | 648 int extseen = 0; |
649 char *p1; | |
0 | 650 |
651 fdb_again: | |
103 | 652 p1 = *p; |
79
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
653 r = lwasm_expr_result2(as, l, p, 0, &v, -1); |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
654 if (r < 0) |
56 | 655 return; |
79
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
656 |
103 | 657 if (r > 0 && extseen == 1) |
79
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
658 { |
103 | 659 register_error(as, l, 2, "Illegal external or inter-segment reference (only 1 per FDB line)"); |
79
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
660 v = 0; |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
661 } |
103 | 662 else if (r > 0) |
663 { | |
664 l -> relocoff = as -> addr - l -> codeaddr; | |
665 *p = p1; | |
666 r = lwasm_expr_result2(as, l, p, 0, &v, 0); | |
667 } | |
79
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
668 |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
669 lwasm_emit(as, l, v >> 8); |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
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parents:
78
diff
changeset
|
670 lwasm_emit(as, l, v & 0xff); |
56 | 671 if (**p == ',') |
0 | 672 { |
56 | 673 (*p)++; |
0 | 674 goto fdb_again; |
675 } | |
676 } | |
677 | |
79
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
678 // FIXME: handle external references in a sensible way |
56 | 679 OPFUNC(pseudo_fqb) |
0 | 680 { |
79
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
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parents:
78
diff
changeset
|
681 int r, v; |
56 | 682 |
0 | 683 fqb_again: |
79
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
684 r = lwasm_expr_result2(as, l, p, 0, &v, -1); |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
685 if (r < 0) |
56 | 686 return; |
79
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
687 |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
688 if (r > 0) |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
689 { |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
690 register_error(as, l, 2, "Illegal external or inter-segment reference"); |
d0ce3f5f6797
Checkpointing deployment of non-constant expression handling
lost
parents:
78
diff
changeset
|
691 v = 0; |
d0ce3f5f6797
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692 } |
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693 |
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694 lwasm_emit(as, l, v >> 24); |
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695 lwasm_emit(as, l, v >> 16); |
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696 lwasm_emit(as, l, v >> 8); |
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697 lwasm_emit(as, l, v & 0xff); |
56 | 698 if (**p == ',') |
0 | 699 { |
56 | 700 (*p)++; |
0 | 701 goto fqb_again; |
702 } | |
703 } | |
704 | |
705 // don't need to do anything if we are executing one of these | |
57 | 706 OPFUNC(pseudo_endc) |
0 | 707 { |
57 | 708 if (as -> skipcond && !(as -> skipmacro)) |
709 { | |
710 as -> skipcount -= 1; | |
711 if (as -> skipcount <= 0) | |
712 { | |
713 as -> skipcond = 0; | |
714 } | |
715 } | |
0 | 716 return; |
717 } | |
718 | |
719 // if "else" executes, we must be going into an "ignore" state | |
57 | 720 OPFUNC(pseudo_else) |
0 | 721 { |
57 | 722 if (as -> skipmacro) |
723 return; | |
724 | |
725 if (as -> skipcond) | |
726 { | |
727 if (as -> skipcount == 1) | |
728 { | |
729 as -> skipcount = 0; | |
730 as -> skipcond = 0; | |
731 } | |
732 return; | |
733 } | |
734 | |
0 | 735 as -> skipcond = 1; |
736 as -> skipcount = 1; | |
737 } | |
738 | |
57 | 739 OPFUNC(pseudo_ifne) |
0 | 740 { |
741 int v1; | |
742 int rval; | |
57 | 743 |
744 if (as -> skipcond && !(as -> skipmacro)) | |
0 | 745 { |
57 | 746 as -> skipcount++; |
747 return; | |
748 } | |
749 | |
103 | 750 rval = lwasm_expr_result2(as, l, p, EXPR_SECTCONST | EXPR_PASS1CONST, &v1, 0); |
79
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751 if (rval != 0) |
57 | 752 return; |
753 if (!v1) | |
754 { | |
755 as -> skipcond = 1; | |
756 as -> skipcount = 1; | |
0 | 757 } |
758 } | |
57 | 759 |
104 | 760 OPFUNC(pseudo_ifdef) |
761 { | |
762 lwasm_symbol_ent_t *se; | |
763 char *sym; | |
764 char *p2; | |
765 | |
766 if (as -> skipcond && !(as -> skipmacro)) | |
767 { | |
768 as -> skipcount++; | |
769 return; | |
770 } | |
771 | |
772 if (as -> passnum != 1) | |
773 { | |
229 | 774 skip_operand(p); |
104 | 775 if (!(l -> fsize)) |
776 { | |
777 as -> skipcond = 1; | |
778 as -> skipcount = 1; | |
779 } | |
780 return; | |
781 } | |
782 | |
783 if (!**p) | |
784 { | |
785 register_error(as, l, 1, "Need symbol name"); | |
786 return; | |
787 } | |
788 | |
789 for (p2 = *p; *p2 && !isspace(*p2); p2++) | |
790 /* do nothing */ ; | |
791 | |
792 sym = lwasm_alloc(p2 - *p + 1); | |
793 memcpy(sym, *p, p2 - *p); | |
794 sym[p2 - *p] = '\0'; | |
795 | |
796 *p = p2; | |
797 | |
798 se = lwasm_find_symbol(as, sym, l -> context); | |
799 if (!se) | |
800 se = lwasm_find_symbol(as, sym, -1); | |
801 | |
802 lwasm_free(sym); | |
803 | |
804 if (!se) | |
805 { | |
806 as -> skipcond = 1; | |
807 as -> skipcount = 1; | |
808 l -> fsize = 0; | |
809 } | |
810 else | |
811 { | |
812 l -> fsize = 1; | |
813 } | |
814 } | |
815 | |
816 OPFUNC(pseudo_ifndef) | |
817 { | |
818 lwasm_symbol_ent_t *se; | |
819 char *sym; | |
820 char *p2; | |
821 | |
822 if (as -> skipcond && !(as -> skipmacro)) | |
823 { | |
824 as -> skipcount++; | |
825 return; | |
826 } | |
827 | |
828 if (as -> passnum != 1) | |
829 { | |
229 | 830 skip_operand(p); |
104 | 831 if (l -> fsize) |
832 { | |
833 as -> skipcond = 1; | |
834 as -> skipcount = 1; | |
835 } | |
836 return; | |
837 } | |
838 | |
839 if (!**p) | |
840 { | |
841 register_error(as, l, 1, "Need symbol name"); | |
842 return; | |
843 } | |
844 | |
845 for (p2 = *p; *p2 && !isspace(*p2); p2++) | |
846 /* do nothing */ ; | |
847 | |
848 sym = lwasm_alloc(p2 - *p + 1); | |
849 memcpy(sym, *p, p2 - *p); | |
850 sym[p2 - *p] = '\0'; | |
851 | |
852 *p = p2; | |
853 | |
854 se = lwasm_find_symbol(as, sym, l -> context); | |
855 if (!se) | |
856 se = lwasm_find_symbol(as, sym, -1); | |
857 | |
858 lwasm_free(sym); | |
859 | |
860 if (se) | |
861 { | |
862 as -> skipcond = 1; | |
863 as -> skipcount = 1; | |
864 l -> fsize = 0; | |
865 } | |
866 else | |
867 { | |
868 l -> fsize = 1; | |
869 } | |
870 } | |
871 | |
57 | 872 OPFUNC(pseudo_ifeq) |
0 | 873 { |
874 int v1; | |
875 int rval; | |
57 | 876 |
877 if (as -> skipcond && !(as -> skipmacro)) | |
0 | 878 { |
57 | 879 as -> skipcount++; |
880 return; | |
0 | 881 } |
57 | 882 |
103 | 883 rval = lwasm_expr_result2(as, l, p, EXPR_SECTCONST | EXPR_PASS1CONST, &v1, 0); |
79
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884 if (rval != 0) |
57 | 885 return; |
886 if (v1) | |
0 | 887 { |
57 | 888 as -> skipcond = 1; |
889 as -> skipcount = 1; | |
0 | 890 } |
891 } | |
57 | 892 |
893 OPFUNC(pseudo_iflt) | |
0 | 894 { |
895 int v1; | |
896 int rval; | |
57 | 897 |
898 if (as -> skipcond && !(as -> skipmacro)) | |
0 | 899 { |
57 | 900 as -> skipcount++; |
901 return; | |
0 | 902 } |
57 | 903 |
103 | 904 rval = lwasm_expr_result2(as, l, p, EXPR_SECTCONST | EXPR_PASS1CONST, &v1, 0); |
79
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905 if (rval != 0) |
57 | 906 return; |
907 if (v1 >= 0) | |
0 | 908 { |
57 | 909 as -> skipcond = 1; |
910 as -> skipcount = 1; | |
0 | 911 } |
912 } | |
57 | 913 |
914 OPFUNC(pseudo_ifle) | |
0 | 915 { |
916 int v1; | |
917 int rval; | |
57 | 918 |
919 if (as -> skipcond && !(as -> skipmacro)) | |
0 | 920 { |
57 | 921 as -> skipcount++; |
922 return; | |
0 | 923 } |
57 | 924 |
103 | 925 rval = lwasm_expr_result2(as, l, p, EXPR_SECTCONST | EXPR_PASS1CONST, &v1, 0); |
79
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|
926 if (rval != 0) |
57 | 927 return; |
928 if (v1 > 0) | |
0 | 929 { |
57 | 930 as -> skipcond = 1; |
931 as -> skipcount = 1; | |
0 | 932 } |
933 } | |
57 | 934 |
935 OPFUNC(pseudo_ifgt) | |
0 | 936 { |
937 int v1; | |
938 int rval; | |
57 | 939 |
940 if (as -> skipcond && !(as -> skipmacro)) | |
0 | 941 { |
57 | 942 as -> skipcount++; |
943 return; | |
0 | 944 } |
57 | 945 |
103 | 946 rval = lwasm_expr_result2(as, l, p, EXPR_SECTCONST | EXPR_PASS1CONST, &v1, 0); |
79
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|
947 if (rval != 0) |
57 | 948 return; |
949 if (v1 <= 0) | |
0 | 950 { |
57 | 951 as -> skipcond = 1; |
952 as -> skipcount = 1; | |
0 | 953 } |
954 } | |
57 | 955 |
956 OPFUNC(pseudo_ifge) | |
0 | 957 { |
958 int v1; | |
959 int rval; | |
57 | 960 |
961 if (as -> skipcond && !(as -> skipmacro)) | |
0 | 962 { |
57 | 963 as -> skipcount++; |
964 return; | |
0 | 965 } |
57 | 966 |
103 | 967 rval = lwasm_expr_result2(as, l, p, EXPR_SECTCONST | EXPR_PASS1CONST, &v1, 0); |
79
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|
968 if (rval != 0) |
57 | 969 return; |
970 if (v1 < 0) | |
0 | 971 { |
57 | 972 as -> skipcond = 1; |
973 as -> skipcount = 1; | |
0 | 974 } |
975 } | |
976 | |
56 | 977 OPFUNC(pseudo_error) |
0 | 978 { |
56 | 979 register_error(as, l, 1, "User error: %s", *p); |
0 | 980 } |
56 | 981 |
74 | 982 |
983 OPFUNC(pseudo_section) | |
984 { | |
985 sectiontab_t *s; | |
986 char *p2; | |
987 char *sn; | |
988 char *opts; | |
989 | |
99 | 990 |
74 | 991 if (as -> outformat != OUTPUT_OBJ) |
992 { | |
993 register_error(as, l, 1, "Sections only supported for obj target"); | |
994 return; | |
995 } | |
996 | |
997 if (as -> csect) | |
998 { | |
999 as -> csect -> offset = as -> addr; | |
1000 as -> csect = NULL; | |
1001 } | |
1002 | |
1003 if (!**p) | |
1004 { | |
1005 register_error(as, l, 1, "Need section name"); | |
1006 return; | |
1007 } | |
1008 | |
1009 for (p2 = *p; *p2 && !isspace(*p2); p2++) | |
1010 /* do nothing */ ; | |
1011 | |
1012 sn = lwasm_alloc(p2 - *p + 1); | |
1013 memcpy(sn, *p, p2 - *p); | |
1014 sn[p2 - *p] = '\0'; | |
1015 | |
1016 *p = p2; | |
1017 | |
1018 opts = strchr(sn, ','); | |
1019 if (opts) | |
1020 { | |
1021 *opts++ = '\0'; | |
1022 } | |
1023 | |
1024 // have we seen the section name already? | |
1025 for (s = as -> sections; s; s = s -> next) | |
1026 { | |
1027 if (!strcmp(s -> name, sn)) | |
1028 break; | |
1029 } | |
1030 | |
99 | 1031 if (s && as -> passnum == 1) |
74 | 1032 { |
1033 lwasm_free(sn); | |
1034 if (opts) | |
1035 { | |
1036 register_error(as, l, 1, "Section options can only be specified the first time"); | |
1037 return; | |
1038 } | |
1039 } | |
1040 else if (!s) | |
1041 { | |
1042 s = lwasm_alloc(sizeof(sectiontab_t)); | |
1043 s -> name = sn; | |
1044 s -> offset = 0; | |
1045 s -> flags = 0; | |
85 | 1046 s -> obytes = NULL; |
1047 s -> oblen = 0; | |
1048 s -> obsize = 0; | |
86 | 1049 s -> rl = NULL; |
90 | 1050 s -> exports = NULL; |
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1051 // if name of section is "bss" or ".bss", assume bss flag |
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1052 // which can be overridden with !bss flag |
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1053 if (!strcasecmp(sn, "bss") || !strcasecmp(sn, ".bss")) |
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|
1054 s -> flags = SECTION_BSS; |
74 | 1055 // parse options; only one "bss" |
1056 if (opts && as -> passnum == 1) | |
1057 { | |
1058 if (!strcasecmp(opts, "bss")) | |
1059 { | |
160
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Added cescapes pragma and a few other compatibility pseudo ops
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|
1060 s -> flags |= SECTION_BSS; |
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|
1061 } |
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diff
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|
1062 else if (!strcasecmp(opts, "!bss")) |
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|
1063 { |
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|
1064 s -> flags &= ~SECTION_BSS; |
74 | 1065 } |
1066 else | |
1067 { | |
1068 register_error(as, l, 1, "Unrecognized section option '%s'", opts); | |
1069 lwasm_free(s -> name); | |
1070 lwasm_free(s); | |
1071 return; | |
1072 } | |
1073 } | |
1074 | |
1075 s -> next = as -> sections; | |
1076 as -> sections = s; | |
1077 } | |
1078 as -> addr = s -> offset; | |
1079 as -> csect = s; | |
1080 as -> context = lwasm_next_context(as); | |
1081 } | |
1082 | |
1083 OPFUNC(pseudo_endsection) | |
1084 { | |
1085 if (as -> outformat != OUTPUT_OBJ) | |
1086 { | |
1087 register_error(as, l, 1, "Sections only supported for obj target"); | |
1088 return; | |
1089 } | |
1090 | |
1091 if (!(as -> csect)) | |
1092 { | |
1093 register_error(as, l, 1, "ENDSECTION when not in a section"); | |
1094 return; | |
1095 } | |
1096 | |
1097 as -> csect -> offset = as -> addr; | |
1098 as -> addr = 0; | |
1099 as -> csect = 0; | |
1100 as -> context = lwasm_next_context(as); | |
229 | 1101 skip_operand(p); |
74 | 1102 } |
82 | 1103 |
1104 OPFUNC(pseudo_extern) | |
1105 { | |
1106 if (as -> passnum != 1) | |
1107 return; | |
1108 | |
1109 if (as -> outformat != OUTPUT_OBJ) | |
1110 { | |
1111 register_error(as, l, 1, "External references only supported for obj target"); | |
1112 return; | |
1113 } | |
1114 | |
1115 if (as -> csect) | |
1116 { | |
1117 register_error(as, l, 1, "Cannot declare external symbols within a section"); | |
1118 return; | |
1119 } | |
1120 | |
221 | 1121 if (l -> sym) |
1122 { | |
1123 lwasm_register_symbol(as, l, l -> sym, 0, SYMBOL_EXTERN); | |
229 | 1124 for ( ; **p; (*p)++) ; |
221 | 1125 return; |
1126 } | |
1127 | |
1128 while (**p) | |
1129 { | |
1130 char *sym2, *sym3; | |
1131 for (sym2 = *p; **p && !isspace(**p) && **p != ','; (*p)++) | |
1132 /* do nothing */ ; | |
1133 | |
1134 if (l -> sym) | |
1135 lwasm_free(l -> sym); | |
1136 | |
1137 sym3 = lwasm_alloc(*p - sym2 + 1); | |
1138 memcpy(sym3, sym2, *p - sym2); | |
1139 sym3[*p - sym2] = '\0'; | |
1140 | |
1141 l -> sym = sym3; | |
1142 debug_message(2, "import symbol: '%s'", sym3); | |
1143 lwasm_register_symbol(as, l, l -> sym, 0, SYMBOL_EXTERN); | |
1144 if (**p && (**p != ',')) | |
1145 { | |
1146 register_error(as, l, 1, "Bad import list"); | |
1147 return; | |
1148 } | |
1149 if (**p == ',') | |
1150 (*p)++; | |
1151 } | |
1152 if (!(l -> sym)) | |
1153 register_error(as, l, 1, "Bad import list"); | |
82 | 1154 } |
90 | 1155 |
1156 OPFUNC(pseudo_export) | |
1157 { | |
1158 lwasm_symbol_ent_t *se; | |
1159 export_list_t *ex; | |
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1160 char *sym2, *sym3; |
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1161 int after = 0; |
158
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1162 |
90 | 1163 if (as -> outformat != OUTPUT_OBJ) |
1164 { | |
1165 register_error(as, l, 1, "Symbol exports only supported for obj target"); | |
1166 return; | |
1167 } | |
158
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1168 |
90 | 1169 if (as -> passnum == 1) |
229 | 1170 { |
1171 skip_operand(p); | |
90 | 1172 return; |
229 | 1173 } |
1174 | |
1175 if (l -> sym) | |
1176 { | |
1177 for ( ; **p; (*p)++) ; | |
1178 } | |
90 | 1179 |
192
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1180 again: |
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1181 if (!(l -> sym) || after == 1) |
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1182 { |
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1183 |
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1184 after = 1; |
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1185 // look for symbol after op |
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1186 if (**p) |
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1187 { |
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1188 for (sym2 = *p; **p && !isspace(**p) && **p != ','; (*p)++) |
162 | 1189 /* do nothing */ ; |
192
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1190 |
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1191 debug_message(2, "export expression: %s", sym2); |
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1192 if (l -> sym) |
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1193 lwasm_free(l -> sym); |
158
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1194 sym3 = lwasm_alloc(*p - sym2 + 1); |
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1195 memcpy(sym3, sym2, *p - sym2); |
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1196 sym3[*p - sym2] = '\0'; |
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1197 |
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1198 l -> sym = sym3; |
192
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1199 debug_message(2, "export symbol: '%s'", sym3); |
158
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1200 } |
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1201 } |
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1202 if (!(l -> sym)) |
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1203 { |
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1204 register_error(as, l, 2, "No symbol"); |
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1205 return; |
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1206 } |
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1207 |
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1208 |
90 | 1209 // the symbol better be defined at this point (pass 2) |
1210 // local symbols cannot be exported nor can "global" symbols | |
1211 se = lwasm_find_symbol(as, l -> sym, -1); | |
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1212 if ((!se || (se -> flags & SYMBOL_EXTERN)) && (as -> pragmas & PRAGMA_IMPORTUNDEFEXPORT)) |
198 | 1213 { |
201 | 1214 void *p; |
1215 p = as -> csect; | |
1216 as -> csect = NULL; | |
198 | 1217 lwasm_register_symbol(as, l, l -> sym, 0, SYMBOL_EXTERN); |
201 | 1218 as -> csect = p; |
198 | 1219 } |
199 | 1220 else |
90 | 1221 { |
201 | 1222 if (!se) |
199 | 1223 { |
1224 register_error(as, l, 2, "Exported symbols must be fully defined within a section"); | |
1225 return; | |
1226 } | |
1227 if (se -> sect == NULL) | |
1228 { | |
1229 register_error(as, l, 2, "Only non-local symbols within a section can be exported"); | |
1230 return; | |
1231 } | |
90 | 1232 |
199 | 1233 if (se -> flags & SYMBOL_SET) |
1234 { | |
1235 register_error(as, l, 2, "You cannot export symbols defined with SET"); | |
1236 return; | |
1237 } | |
90 | 1238 |
199 | 1239 // if the symbol is not already a simple value, re-evaluate it |
1240 // and see if it becomes simple | |
90 | 1241 |
1242 | |
199 | 1243 if (se -> flags & SYMBOL_COMPLEX) |
1244 { | |
1245 register_error(as, l, 2, "Exported symbols must be fully resolved on pass 2"); | |
1246 return; | |
1247 } | |
90 | 1248 |
199 | 1249 // search for existing export |
1250 for (ex = se -> sect -> exports; ex; ex = ex -> next) | |
1251 if (!strcmp(l -> sym, ex -> sym)) | |
1252 break; | |
1253 if (ex) | |
1254 { | |
1255 register_error(as, l, 2, "Symbol %s already exported", l -> sym); | |
1256 return; | |
1257 } | |
1258 | |
1259 // add an external reference | |
1260 ex = lwasm_alloc(sizeof(export_list_t)); | |
1261 ex -> next = se -> sect -> exports; | |
1262 se -> sect -> exports = ex; | |
1263 ex -> offset = se -> value; | |
1264 ex -> sym = lwasm_strdup(se -> sym); | |
90 | 1265 } |
202
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1266 next: |
192
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1267 if (after == 1) |
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1268 { |
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1269 if (**p == ',') |
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1270 { |
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1271 debug_message(2, "Export another symbol: %s", *p); |
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1272 (*p)++; |
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1273 for ( ; **p && isspace(**p); (*p)++) |
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1274 /* do nothing */ ; |
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1275 goto again; |
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1276 } |
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1277 } |
90 | 1278 } |