Mercurial > hg-old > index.cgi
annotate src/lwasm.h @ 82:03be43ae19cf
Added EXTERN directive
| author | lost |
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| date | Sat, 10 Jan 2009 22:24:29 +0000 |
| parents | 121bf4a588ea |
| children | 918be0c02239 |
| rev | line source |
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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 |
| 74 | 35 // structure for tracking sections |
| 36 #define SECTION_BSS 1 // the section contains no actual code - just uninit vars | |
| 37 typedef struct sectiontab_s sectiontab_t; | |
| 38 struct sectiontab_s | |
| 39 { | |
| 40 char *name; // name of the section | |
| 41 int offset; // current offset in the section | |
| 42 int flags; // section flags | |
| 43 sectiontab_t *next; // next section | |
| 44 }; | |
| 45 | |
| 57 | 46 // structure for tracking macros |
| 47 typedef struct macrotab_s macrotab_t; | |
| 48 struct macrotab_s | |
| 49 { | |
| 50 char *name; | |
| 51 char **lines; | |
| 52 int numlines; | |
| 53 macrotab_t *next; | |
| 54 }; | |
| 55 | |
| 26 | 56 // structure for tracking errors |
| 57 typedef struct lwasm_error_s lwasm_error_t; | |
| 58 struct lwasm_error_s | |
| 59 { | |
| 60 char *mess; // the actual error message | |
| 61 lwasm_error_t *next; // ptr to next error | |
| 62 }; | |
| 63 | |
| 21 | 64 // structure for keeping track of lines |
| 77 | 65 // it also as space for 4 expressions which is enough for all known |
| 66 // instructions and addressing modes | |
| 67 // on pass 1, the expressions are parsed, on pass 2 they are re-evaluated | |
| 68 // to determine constancy | |
| 21 | 69 typedef struct lwasm_line_s lwasm_line_t; |
| 70 struct lwasm_line_s { | |
| 71 char *text; // the actual text of the line | |
| 72 int lineno; // line number within the file | |
| 73 char *filename; // file name reference | |
| 74 lwasm_line_t *next; // next line | |
| 75 lwasm_line_t *prev; // previous line | |
| 26 | 76 lwasm_error_t *err; // error messages |
| 28 | 77 int fsize; // forced size (0 = no forced size) |
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78 char *sym; // scratch area to record the presence of a symbol |
| 42 | 79 unsigned char *bytes; // actual bytes emitted |
| 80 int codelen; // number of bytes emitted | |
| 81 int codesize; // the size of the code buffer | |
| 44 | 82 int codeaddr; // address the code goes at |
| 46 | 83 int nocodelen; // for "RMB" type instructions |
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84 int addrset; // set if this instruction sets the assembly address |
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85 int symaddr; // set if this instruction sets a symbol addr with EQU or the like |
| 67 | 86 int badop; // bad operation - ignore it |
| 74 | 87 |
| 88 // the following are used for obj format - for external references, inter-section | |
| 89 // references, and intrasection relocations | |
| 90 int relocoff; // offset into insn where relocation value goes | |
| 77 | 91 lwasm_expr_stack_t *exprs[4]; // non-constant expression values |
| 92 int exprvals[4]; // constant expression values | |
| 93 char *exprends[4]; // pointer to character after end of expression | |
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94 }; |
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95 |
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96 // for keeping track of symbols |
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97 #define SYMBOL_SET 1 // the symbol was used for "SET" |
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98 #define SYMBOL_COMPLEX 2 // register symbol as a complex symbol (from l -> expr) |
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99 #define SYMBOL_FORCE 4 // force resetting the symbol value if it already exists on pass 2 |
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100 #define SYMBOL_NORM 0 // no flags |
| 82 | 101 #define SYMBOL_EXTERN 8 // the symbol is an external reference |
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102 typedef struct lwasm_symbol_ent_s lwasm_symbol_ent_t; |
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103 struct lwasm_symbol_ent_s |
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104 { |
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105 char *sym; // the symbol |
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106 int context; // the context number of the symbol (-1 for global) |
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107 int value; // the value of the symbol |
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108 int flags; // flags for the symbol |
| 82 | 109 char *externalname; // for external references that are aliased locally |
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110 sectiontab_t *sect; // the section the symbol exists in; NULL for none |
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111 lwasm_expr_stack_t *expr; // expression for a symbol that is not constant NULL for const |
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112 lwasm_symbol_ent_t *next; // next symbol in the table |
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113 lwasm_symbol_ent_t *prev; // previous symbol in the table |
| 21 | 114 }; |
| 0 | 115 |
| 116 // keep track of current assembler state | |
| 117 typedef struct { | |
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118 int dpval; // current dp value (setdp) |
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119 int addr; // current address |
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120 int context; // context counter (for local symbols) |
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121 int errorcount; // error count |
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122 int passnum; // which pass are we on? |
| 21 | 123 int execaddr; // execution address for the program (END ....) |
| 124 int pragmas; // what pragmas are in effect? | |
| 125 | |
| 126 lwasm_line_t *lineshead; // first line of source code | |
| 127 lwasm_line_t *linestail; // last line of source code | |
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128 |
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129 lwasm_symbol_ent_t *symhead; // first entry in symbol table |
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130 lwasm_symbol_ent_t *symtail; // last entry in symbol table |
| 57 | 131 |
| 132 macrotab_t *macros; // macro table | |
| 21 | 133 |
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134 const char *infile; // input file |
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135 const char *outfile; // output file |
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136 const char *listfile; // output listing file |
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137 int outformat; // output format type |
| 21 | 138 char **filelist; // files that have been read |
| 139 int filelistlen; // number of files in the list | |
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140 |
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141 int endseen; // set to true if "end" has been seen |
| 57 | 142 int skipcond; // skipping a condition? |
| 143 int skipcount; // how many? | |
| 144 int skipmacro; // skipping a macro? | |
| 145 int inmacro; // are we currently in a macro? | |
| 146 int macroex; // current depth of macro expansion | |
| 147 int nextcontext; // next context number | |
| 148 int skiplines; // number of lines to skip | |
| 74 | 149 |
| 150 // items used only for the "object" target | |
| 151 sectiontab_t *sections; // pointer to section table | |
| 152 sectiontab_t *csect; // current section - NULL if not in one | |
| 0 | 153 } asmstate_t; |
| 154 | |
| 155 #define PRAGMA_NOINDEX0TONONE 1 | |
| 156 | |
| 26 | 157 #ifndef __lwasm_c_seen__ |
| 158 #define __lwasm_E__ extern | |
| 159 #else | |
| 160 #define __lwasm_E__ | |
| 161 #endif | |
| 162 | |
| 38 | 163 __lwasm_E__ int debug_level; |
| 164 | |
| 26 | 165 __lwasm_E__ int register_error(asmstate_t *as, lwasm_line_t *l, int pass, const char *fmt, ...); |
| 38 | 166 __lwasm_E__ void debug_message(int level, const char *fmt, ...); |
| 26 | 167 |
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168 __lwasm_E__ void lwasm_emit(asmstate_t *as, lwasm_line_t *l, int b); |
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169 __lwasm_E__ void lwasm_emitop(asmstate_t *as, lwasm_line_t *l, int o); |
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170 __lwasm_E__ int lwasm_lookupreg2(const char *reglist, char **str); |
| 32 | 171 __lwasm_E__ int lwasm_lookupreg3(const char *rlist, const char **str); |
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172 |
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173 __lwasm_E__ lwasm_expr_stack_t *lwasm_evaluate_expr(asmstate_t *as, lwasm_line_t *l, const char *inp, const char **outp); |
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174 |
| 55 | 175 |
| 57 | 176 // return next context number and update it |
| 177 __lwasm_E__ int lwasm_next_context(asmstate_t *as); | |
| 178 | |
| 55 | 179 // also throw an error on expression eval failure |
| 76 | 180 // return 0 on ok, -1 on error, 1 if a complex expression was returned |
| 55 | 181 #define EXPR_NOFLAG 0 |
| 76 | 182 #define EXPR_PASS1CONST 1 // no forward references on pass 1 |
| 183 #define EXPR_PASS2CONST 2 // no undefined references on pass 2 | |
| 184 #define EXPR_BYTE 4 // the result must fit within 8 bits | |
| 185 #define EXPR_COMPLEX 8 // a non-constant result is permitted (stored in l -> expr) | |
| 77 | 186 #define EXPR_NOINTERSECT 16 // only allow intra-section values (pass 2) |
| 76 | 187 |
| 55 | 188 __lwasm_E__ int lwasm_expr_result(asmstate_t *as, lwasm_line_t *l, char **inp, int flag, int *val); |
| 77 | 189 __lwasm_E__ int lwasm_expr_result2(asmstate_t *as, lwasm_line_t *l, char **inp, int flag, int *val, int slot); |
| 55 | 190 |
| 26 | 191 #undef __lwasm_E__ |
| 192 | |
| 193 | |
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194 #ifndef __symbol_c_seen__ |
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195 #define __lwasm_E__ extern |
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196 #else |
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197 #define __lwasm_E__ |
| 0 | 198 #endif |
| 199 | |
| 64 | 200 __lwasm_E__ int lwasm_register_symbol(asmstate_t *as, lwasm_line_t *l, char *sym, int val, int flags); |
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201 __lwasm_E__ lwasm_symbol_ent_t *lwasm_find_symbol(asmstate_t *as, char *sym, int scontext); |
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202 __lwasm_E__ int lwasm_set_symbol(asmstate_t *as, char *sym, int scontext, int val); |
| 58 | 203 __lwasm_E__ void lwasm_list_symbols(asmstate_t *as, FILE *f); |
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204 #undef __lwasm_E__ |
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205 |
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206 |
| 0 | 207 |
| 208 #endif //__lwasm_h_seen__ |