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annotate lwasm/lwasm.h @ 243:f9f01a499525 2.x
Added zero-width external references
author | lost |
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date | Tue, 15 Sep 2009 03:16:17 +0000 |
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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 | |
26 | 81 // structure for tracking errors |
82 typedef struct lwasm_error_s lwasm_error_t; | |
83 struct lwasm_error_s | |
84 { | |
85 char *mess; // the actual error message | |
86 lwasm_error_t *next; // ptr to next error | |
87 }; | |
88 | |
21 | 89 // structure for keeping track of lines |
77 | 90 // it also as space for 4 expressions which is enough for all known |
91 // instructions and addressing modes | |
92 // on pass 1, the expressions are parsed, on pass 2 they are re-evaluated | |
93 // to determine constancy | |
21 | 94 typedef struct lwasm_line_s lwasm_line_t; |
95 struct lwasm_line_s { | |
96 char *text; // the actual text of the line | |
97 int lineno; // line number within the file | |
98 char *filename; // file name reference | |
99 lwasm_line_t *next; // next line | |
100 lwasm_line_t *prev; // previous line | |
26 | 101 lwasm_error_t *err; // error messages |
28 | 102 int fsize; // forced size (0 = no forced size) |
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103 char *sym; // scratch area to record the presence of a symbol |
42 | 104 unsigned char *bytes; // actual bytes emitted |
105 int codelen; // number of bytes emitted | |
106 int codesize; // the size of the code buffer | |
44 | 107 int codeaddr; // address the code goes at |
46 | 108 int nocodelen; // for "RMB" type instructions |
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109 int addrset; // set if this instruction sets the assembly address |
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110 int symaddr; // set if this instruction sets a symbol addr with EQU or the like |
67 | 111 int badop; // bad operation - ignore it |
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112 int context; // the symbol context for this line |
190 | 113 int forceglobal; // force a "global" symbol definition if constant |
74 | 114 |
115 // the following are used for obj format - for external references, inter-section | |
116 // references, and intrasection relocations | |
117 int relocoff; // offset into insn where relocation value goes | |
204
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118 int reloc8bit; // size of relocation (0 = 16 bit, 1 = 8 bit) |
77 | 119 lwasm_expr_stack_t *exprs[4]; // non-constant expression values |
120 int exprvals[4]; // constant expression values | |
121 char *exprends[4]; // pointer to character after end of expression | |
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122 int inmod; // in an os9 module |
85 | 123 |
124 sectiontab_t *sect; // which section is the line in? | |
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125 }; |
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126 |
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127 // for keeping track of symbols |
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128 #define SYMBOL_SET 1 // the symbol was used for "SET" |
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129 #define SYMBOL_COMPLEX 2 // register symbol as a complex symbol (from l -> expr) |
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130 #define SYMBOL_FORCE 4 // force resetting the symbol value if it already exists on pass 2 |
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131 #define SYMBOL_NORM 0 // no flags |
82 | 132 #define SYMBOL_EXTERN 8 // the symbol is an external reference |
190 | 133 #define SYMBOL_GLOBAL 16 // force global if non-complex symbol |
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134 typedef struct lwasm_symbol_ent_s lwasm_symbol_ent_t; |
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135 struct lwasm_symbol_ent_s |
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136 { |
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137 char *sym; // the symbol |
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138 int context; // the context number of the symbol (-1 for global) |
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139 int value; // the value of the symbol |
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140 int flags; // flags for the symbol |
82 | 141 char *externalname; // for external references that are aliased locally |
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142 sectiontab_t *sect; // the section the symbol exists in; NULL for none |
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143 lwasm_expr_stack_t *expr; // expression for a symbol that is not constant NULL for const |
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144 lwasm_symbol_ent_t *next; // next symbol in the table |
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145 lwasm_symbol_ent_t *prev; // previous symbol in the table |
21 | 146 }; |
0 | 147 |
148 // keep track of current assembler state | |
149 typedef struct { | |
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150 int dpval; // current dp value (setdp) |
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151 int addr; // current address |
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152 int context; // context counter (for local symbols) |
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153 int errorcount; // error count |
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154 int passnum; // which pass are we on? |
21 | 155 int execaddr; // execution address for the program (END ....) |
156 int pragmas; // what pragmas are in effect? | |
157 | |
158 lwasm_line_t *lineshead; // first line of source code | |
159 lwasm_line_t *linestail; // last line of source code | |
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160 |
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161 lwasm_symbol_ent_t *symhead; // first entry in symbol table |
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162 lwasm_symbol_ent_t *symtail; // last entry in symbol table |
57 | 163 |
164 macrotab_t *macros; // macro table | |
21 | 165 |
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166 const char *infile; // input file |
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167 const char *outfile; // output file |
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168 const char *listfile; // output listing file |
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169 int outformat; // output format type |
21 | 170 char **filelist; // files that have been read |
171 int filelistlen; // number of files in the list | |
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172 |
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173 int endseen; // set to true if "end" has been seen |
57 | 174 int skipcond; // skipping a condition? |
175 int skipcount; // how many? | |
176 int skipmacro; // skipping a macro? | |
177 int inmacro; // are we currently in a macro? | |
178 int macroex; // current depth of macro expansion | |
179 int nextcontext; // next context number | |
180 int skiplines; // number of lines to skip | |
74 | 181 |
182 // items used only for the "object" target | |
183 sectiontab_t *sections; // pointer to section table | |
184 sectiontab_t *csect; // current section - NULL if not in one | |
230
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185 |
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186 // only 6809 ops? |
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187 int no6309; |
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188 |
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189 // for os9 mode |
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190 int inmod; // in a module? |
238 | 191 unsigned char crc[3]; // running crc count |
243 | 192 |
193 int nextdeps; // number forced external deps | |
194 char **extdeps; // external dependencies | |
0 | 195 } asmstate_t; |
196 | |
143
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197 // do not rewrite XXX,r to ,r if XXX evaluates to 0 |
0 | 198 #define PRAGMA_NOINDEX0TONONE 1 |
143
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199 // any undefined symbols are considered external |
160
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200 #define PRAGMA_UNDEFEXTERN 2 |
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201 // allow C-style escapes in fcc, fcs, and fcn directives |
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202 #define PRAGMA_CESCAPES 4 |
198 | 203 // allow "export <undefsym>" to import the symbol |
204 #define PRAGMA_IMPORTUNDEFEXPORT 8 | |
236
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205 // don't have $ as a local symbol |
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206 #define PRAGMA_DOLLARNOTLOCAL 16 |
198 | 207 |
26 | 208 #ifndef __lwasm_c_seen__ |
209 #define __lwasm_E__ extern | |
210 #else | |
211 #define __lwasm_E__ | |
212 #endif | |
213 | |
38 | 214 __lwasm_E__ int debug_level; |
215 | |
26 | 216 __lwasm_E__ int register_error(asmstate_t *as, lwasm_line_t *l, int pass, const char *fmt, ...); |
38 | 217 __lwasm_E__ void debug_message(int level, const char *fmt, ...); |
26 | 218 |
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219 __lwasm_E__ void lwasm_emit(asmstate_t *as, lwasm_line_t *l, int b); |
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220 __lwasm_E__ void lwasm_emitop(asmstate_t *as, lwasm_line_t *l, int o); |
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221 __lwasm_E__ int lwasm_lookupreg2(const char *reglist, char **str); |
32 | 222 __lwasm_E__ int lwasm_lookupreg3(const char *rlist, const char **str); |
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223 |
101
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224 __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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225 |
55 | 226 |
57 | 227 // return next context number and update it |
228 __lwasm_E__ int lwasm_next_context(asmstate_t *as); | |
229 | |
55 | 230 // also throw an error on expression eval failure |
76 | 231 // return 0 on ok, -1 on error, 1 if a complex expression was returned |
55 | 232 #define EXPR_NOFLAG 0 |
76 | 233 #define EXPR_PASS1CONST 1 // no forward references on pass 1 |
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234 #define EXPR_SECTCONST 2 // resolve symbols local to section |
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235 #define EXPR_REEVAL 4 // re-evaluate the expression |
55 | 236 __lwasm_E__ int lwasm_expr_result(asmstate_t *as, lwasm_line_t *l, char **inp, int flag, int *val); |
77 | 237 __lwasm_E__ int lwasm_expr_result2(asmstate_t *as, lwasm_line_t *l, char **inp, int flag, int *val, int slot); |
55 | 238 |
26 | 239 #undef __lwasm_E__ |
240 | |
241 | |
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242 #ifndef __symbol_c_seen__ |
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243 #define __lwasm_E__ extern |
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244 #else |
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245 #define __lwasm_E__ |
0 | 246 #endif |
247 | |
64 | 248 __lwasm_E__ int lwasm_register_symbol(asmstate_t *as, lwasm_line_t *l, char *sym, int val, int flags); |
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249 __lwasm_E__ lwasm_symbol_ent_t *lwasm_find_symbol(asmstate_t *as, char *sym, int scontext); |
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250 __lwasm_E__ int lwasm_set_symbol(asmstate_t *as, char *sym, int scontext, int val); |
58 | 251 __lwasm_E__ void lwasm_list_symbols(asmstate_t *as, FILE *f); |
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538e15927776
Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
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252 #undef __lwasm_E__ |
538e15927776
Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents:
32
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253 |
538e15927776
Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents:
32
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254 |
229 | 255 #define skip_operand(p) do { char **p2 = (char **)(p); for ( ; **p2; (*p2)++ ) ; } while (0) |
0 | 256 |
257 #endif //__lwasm_h_seen__ |