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annotate lwasm/lwasm.h @ 254:c7a41b4c89b3 2.x
Added struct support to LWASM
| author | lost |
|---|---|
| date | Sat, 19 Dec 2009 06:38:43 +0000 |
| parents | f9f01a499525 |
| children | e27279180a73 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 lwasm.h |
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3 Copyright © 2008 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 the main defs used by the assembler |
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21 */ |
| 0 | 22 |
| 23 | |
| 24 #ifndef __lwasm_h_seen__ | |
| 25 #define __lwasm_h_seen__ | |
| 26 | |
| 58 | 27 #include <stdio.h> |
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28 #include "expr.h" |
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29 |
| 0 | 30 #define OUTPUT_DECB 0 // DECB multirecord format |
| 31 #define OUTPUT_RAW 1 // raw sequence of bytes | |
| 21 | 32 #define OUTPUT_OBJ 2 // proprietary object file format |
| 46 | 33 #define OUTPUT_RAWREL 3 // raw bytes where ORG causes a SEEK in the file |
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34 #define OUTPUT_OS9 4 // os9 module target |
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35 |
| 74 | 36 // structure for tracking sections |
| 86 | 37 typedef struct section_reloc_list_s section_reloc_list_t; |
| 38 struct section_reloc_list_s | |
| 39 { | |
| 40 int offset; // offset into section | |
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41 int relocsize; // size of relocation in bytes |
| 86 | 42 lwasm_expr_stack_t *expr; // value definition |
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43 int context; // symbol context (for local syms) |
| 86 | 44 section_reloc_list_t *next; // next relocation |
| 45 }; | |
| 46 | |
| 90 | 47 typedef struct export_list_s export_list_t; |
| 48 struct export_list_s | |
| 49 { | |
| 50 int offset; // offset of symbol | |
| 51 char *sym; // name of symbol | |
| 52 export_list_t *next; // next export | |
| 53 }; | |
| 54 | |
| 74 | 55 #define SECTION_BSS 1 // the section contains no actual code - just uninit vars |
| 56 typedef struct sectiontab_s sectiontab_t; | |
| 57 struct sectiontab_s | |
| 58 { | |
| 59 char *name; // name of the section | |
| 60 int offset; // current offset in the section | |
| 61 int flags; // section flags | |
| 62 sectiontab_t *next; // next section | |
| 86 | 63 // the following are used during code output |
| 85 | 64 unsigned char *obytes; // output bytes |
| 65 int oblen; // how many bytes output so far? | |
| 66 int obsize; // how big is output buffer so far? | |
| 86 | 67 section_reloc_list_t *rl; // relocation list |
| 90 | 68 export_list_t *exports; // export list for the section |
| 74 | 69 }; |
| 70 | |
| 57 | 71 // structure for tracking macros |
| 72 typedef struct macrotab_s macrotab_t; | |
| 73 struct macrotab_s | |
| 74 { | |
| 75 char *name; | |
| 76 char **lines; | |
| 77 int numlines; | |
| 78 macrotab_t *next; | |
| 79 }; | |
| 80 | |
| 254 | 81 // structure for tracking structs |
| 82 struct struct_sym_e; | |
| 83 | |
| 84 typedef struct structtab_s structtab_t; | |
| 85 struct structtab_s | |
| 86 { | |
| 87 char *name; | |
| 88 int size; | |
| 89 struct struct_sym_e *fields; | |
| 90 structtab_t *next; | |
| 91 }; | |
| 92 | |
| 93 struct struct_sym_e | |
| 94 { | |
| 95 char *name; | |
| 96 int size; | |
| 97 structtab_t *substruct; | |
| 98 struct struct_sym_e *next; | |
| 99 }; | |
| 100 | |
| 26 | 101 // structure for tracking errors |
| 102 typedef struct lwasm_error_s lwasm_error_t; | |
| 103 struct lwasm_error_s | |
| 104 { | |
| 105 char *mess; // the actual error message | |
| 106 lwasm_error_t *next; // ptr to next error | |
| 107 }; | |
| 108 | |
| 21 | 109 // structure for keeping track of lines |
| 77 | 110 // it also as space for 4 expressions which is enough for all known |
| 111 // instructions and addressing modes | |
| 112 // on pass 1, the expressions are parsed, on pass 2 they are re-evaluated | |
| 113 // to determine constancy | |
| 21 | 114 typedef struct lwasm_line_s lwasm_line_t; |
| 115 struct lwasm_line_s { | |
| 116 char *text; // the actual text of the line | |
| 117 int lineno; // line number within the file | |
| 118 char *filename; // file name reference | |
| 119 lwasm_line_t *next; // next line | |
| 120 lwasm_line_t *prev; // previous line | |
| 26 | 121 lwasm_error_t *err; // error messages |
| 28 | 122 int fsize; // forced size (0 = no forced size) |
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123 char *sym; // scratch area to record the presence of a symbol |
| 42 | 124 unsigned char *bytes; // actual bytes emitted |
| 125 int codelen; // number of bytes emitted | |
| 126 int codesize; // the size of the code buffer | |
| 44 | 127 int codeaddr; // address the code goes at |
| 46 | 128 int nocodelen; // for "RMB" type instructions |
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129 int addrset; // set if this instruction sets the assembly address |
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130 int symaddr; // set if this instruction sets a symbol addr with EQU or the like |
| 67 | 131 int badop; // bad operation - ignore it |
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132 int context; // the symbol context for this line |
| 190 | 133 int forceglobal; // force a "global" symbol definition if constant |
| 74 | 134 |
| 135 // the following are used for obj format - for external references, inter-section | |
| 136 // references, and intrasection relocations | |
| 137 int relocoff; // offset into insn where relocation value goes | |
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138 int reloc8bit; // size of relocation (0 = 16 bit, 1 = 8 bit) |
| 77 | 139 lwasm_expr_stack_t *exprs[4]; // non-constant expression values |
| 140 int exprvals[4]; // constant expression values | |
| 141 char *exprends[4]; // pointer to character after end of expression | |
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142 int inmod; // in an os9 module |
| 85 | 143 |
| 144 sectiontab_t *sect; // which section is the line in? | |
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145 }; |
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146 |
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147 // for keeping track of symbols |
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148 #define SYMBOL_SET 1 // the symbol was used for "SET" |
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149 #define SYMBOL_COMPLEX 2 // register symbol as a complex symbol (from l -> expr) |
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150 #define SYMBOL_FORCE 4 // force resetting the symbol value if it already exists on pass 2 |
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151 #define SYMBOL_NORM 0 // no flags |
| 82 | 152 #define SYMBOL_EXTERN 8 // the symbol is an external reference |
| 190 | 153 #define SYMBOL_GLOBAL 16 // force global if non-complex symbol |
| 254 | 154 #define SYMBOL_NOCHECK 32 // don't check characters for validity |
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155 typedef struct lwasm_symbol_ent_s lwasm_symbol_ent_t; |
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156 struct lwasm_symbol_ent_s |
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157 { |
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158 char *sym; // the symbol |
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159 int context; // the context number of the symbol (-1 for global) |
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160 int value; // the value of the symbol |
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161 int flags; // flags for the symbol |
| 82 | 162 char *externalname; // for external references that are aliased locally |
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163 sectiontab_t *sect; // the section the symbol exists in; NULL for none |
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164 lwasm_expr_stack_t *expr; // expression for a symbol that is not constant NULL for const |
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165 lwasm_symbol_ent_t *next; // next symbol in the table |
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166 lwasm_symbol_ent_t *prev; // previous symbol in the table |
| 21 | 167 }; |
| 0 | 168 |
| 169 // keep track of current assembler state | |
| 170 typedef struct { | |
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171 int dpval; // current dp value (setdp) |
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172 int addr; // current address |
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173 int context; // context counter (for local symbols) |
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174 int errorcount; // error count |
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175 int passnum; // which pass are we on? |
| 21 | 176 int execaddr; // execution address for the program (END ....) |
| 177 int pragmas; // what pragmas are in effect? | |
| 178 | |
| 179 lwasm_line_t *lineshead; // first line of source code | |
| 180 lwasm_line_t *linestail; // last line of source code | |
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181 |
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182 lwasm_symbol_ent_t *symhead; // first entry in symbol table |
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183 lwasm_symbol_ent_t *symtail; // last entry in symbol table |
| 57 | 184 |
| 185 macrotab_t *macros; // macro table | |
| 254 | 186 structtab_t *structs; // structure table |
| 187 structtab_t *cstruct; // address within the current structure def | |
| 21 | 188 |
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189 const char *infile; // input file |
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190 const char *outfile; // output file |
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191 const char *listfile; // output listing file |
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192 int outformat; // output format type |
| 21 | 193 char **filelist; // files that have been read |
| 194 int filelistlen; // number of files in the list | |
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195 |
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196 int endseen; // set to true if "end" has been seen |
| 57 | 197 int skipcond; // skipping a condition? |
| 198 int skipcount; // how many? | |
| 199 int skipmacro; // skipping a macro? | |
| 200 int inmacro; // are we currently in a macro? | |
| 201 int macroex; // current depth of macro expansion | |
| 202 int nextcontext; // next context number | |
| 203 int skiplines; // number of lines to skip | |
| 254 | 204 int instruct; // are we currently in a structure def? |
| 74 | 205 |
| 206 // items used only for the "object" target | |
| 207 sectiontab_t *sections; // pointer to section table | |
| 208 sectiontab_t *csect; // current section - NULL if not in one | |
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209 |
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210 // only 6809 ops? |
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211 int no6309; |
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212 |
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213 // for os9 mode |
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214 int inmod; // in a module? |
| 238 | 215 unsigned char crc[3]; // running crc count |
| 243 | 216 |
| 217 int nextdeps; // number forced external deps | |
| 218 char **extdeps; // external dependencies | |
| 0 | 219 } asmstate_t; |
| 220 | |
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221 // do not rewrite XXX,r to ,r if XXX evaluates to 0 |
| 0 | 222 #define PRAGMA_NOINDEX0TONONE 1 |
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223 // any undefined symbols are considered external |
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224 #define PRAGMA_UNDEFEXTERN 2 |
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225 // allow C-style escapes in fcc, fcs, and fcn directives |
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226 #define PRAGMA_CESCAPES 4 |
| 198 | 227 // allow "export <undefsym>" to import the symbol |
| 228 #define PRAGMA_IMPORTUNDEFEXPORT 8 | |
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229 // don't have $ as a local symbol |
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230 #define PRAGMA_DOLLARNOTLOCAL 16 |
| 198 | 231 |
| 26 | 232 #ifndef __lwasm_c_seen__ |
| 233 #define __lwasm_E__ extern | |
| 234 #else | |
| 235 #define __lwasm_E__ | |
| 236 #endif | |
| 237 | |
| 38 | 238 __lwasm_E__ int debug_level; |
| 239 | |
| 26 | 240 __lwasm_E__ int register_error(asmstate_t *as, lwasm_line_t *l, int pass, const char *fmt, ...); |
| 38 | 241 __lwasm_E__ void debug_message(int level, const char *fmt, ...); |
| 26 | 242 |
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243 __lwasm_E__ void lwasm_emit(asmstate_t *as, lwasm_line_t *l, int b); |
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244 __lwasm_E__ void lwasm_emitop(asmstate_t *as, lwasm_line_t *l, int o); |
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245 __lwasm_E__ int lwasm_lookupreg2(const char *reglist, char **str); |
| 32 | 246 __lwasm_E__ int lwasm_lookupreg3(const char *rlist, const char **str); |
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247 |
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248 __lwasm_E__ lwasm_expr_stack_t *lwasm_evaluate_expr(asmstate_t *as, lwasm_line_t *l, const char *inp, const char **outp, int flags); |
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249 |
| 55 | 250 |
| 57 | 251 // return next context number and update it |
| 252 __lwasm_E__ int lwasm_next_context(asmstate_t *as); | |
| 253 | |
| 55 | 254 // also throw an error on expression eval failure |
| 76 | 255 // return 0 on ok, -1 on error, 1 if a complex expression was returned |
| 55 | 256 #define EXPR_NOFLAG 0 |
| 76 | 257 #define EXPR_PASS1CONST 1 // no forward references on pass 1 |
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258 #define EXPR_SECTCONST 2 // resolve symbols local to section |
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259 #define EXPR_REEVAL 4 // re-evaluate the expression |
| 55 | 260 __lwasm_E__ int lwasm_expr_result(asmstate_t *as, lwasm_line_t *l, char **inp, int flag, int *val); |
| 77 | 261 __lwasm_E__ int lwasm_expr_result2(asmstate_t *as, lwasm_line_t *l, char **inp, int flag, int *val, int slot); |
| 55 | 262 |
| 26 | 263 #undef __lwasm_E__ |
| 264 | |
| 265 | |
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266 #ifndef __symbol_c_seen__ |
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267 #define __lwasm_E__ extern |
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268 #else |
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269 #define __lwasm_E__ |
| 0 | 270 #endif |
| 271 | |
| 64 | 272 __lwasm_E__ int lwasm_register_symbol(asmstate_t *as, lwasm_line_t *l, char *sym, int val, int flags); |
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273 __lwasm_E__ lwasm_symbol_ent_t *lwasm_find_symbol(asmstate_t *as, char *sym, int scontext); |
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274 __lwasm_E__ int lwasm_set_symbol(asmstate_t *as, char *sym, int scontext, int val); |
| 58 | 275 __lwasm_E__ void lwasm_list_symbols(asmstate_t *as, FILE *f); |
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276 #undef __lwasm_E__ |
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277 |
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278 |
| 229 | 279 #define skip_operand(p) do { char **p2 = (char **)(p); for ( ; **p2; (*p2)++ ) ; } while (0) |
| 0 | 280 |
| 281 #endif //__lwasm_h_seen__ |