Mercurial > hg-old > index.cgi
annotate src/lwasm.h @ 85:918be0c02239
Started adding object target output
| author | lost |
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| date | Fri, 16 Jan 2009 05:14:49 +0000 |
| parents | 03be43ae19cf |
| children | 033a328a10ae |
| 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 | |
| 85 | 44 unsigned char *obytes; // output bytes |
| 45 int oblen; // how many bytes output so far? | |
| 46 int obsize; // how big is output buffer so far? | |
| 74 | 47 }; |
| 48 | |
| 57 | 49 // structure for tracking macros |
| 50 typedef struct macrotab_s macrotab_t; | |
| 51 struct macrotab_s | |
| 52 { | |
| 53 char *name; | |
| 54 char **lines; | |
| 55 int numlines; | |
| 56 macrotab_t *next; | |
| 57 }; | |
| 58 | |
| 26 | 59 // structure for tracking errors |
| 60 typedef struct lwasm_error_s lwasm_error_t; | |
| 61 struct lwasm_error_s | |
| 62 { | |
| 63 char *mess; // the actual error message | |
| 64 lwasm_error_t *next; // ptr to next error | |
| 65 }; | |
| 66 | |
| 21 | 67 // structure for keeping track of lines |
| 77 | 68 // it also as space for 4 expressions which is enough for all known |
| 69 // instructions and addressing modes | |
| 70 // on pass 1, the expressions are parsed, on pass 2 they are re-evaluated | |
| 71 // to determine constancy | |
| 21 | 72 typedef struct lwasm_line_s lwasm_line_t; |
| 73 struct lwasm_line_s { | |
| 74 char *text; // the actual text of the line | |
| 75 int lineno; // line number within the file | |
| 76 char *filename; // file name reference | |
| 77 lwasm_line_t *next; // next line | |
| 78 lwasm_line_t *prev; // previous line | |
| 26 | 79 lwasm_error_t *err; // error messages |
| 28 | 80 int fsize; // forced size (0 = no forced size) |
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81 char *sym; // scratch area to record the presence of a symbol |
| 42 | 82 unsigned char *bytes; // actual bytes emitted |
| 83 int codelen; // number of bytes emitted | |
| 84 int codesize; // the size of the code buffer | |
| 44 | 85 int codeaddr; // address the code goes at |
| 46 | 86 int nocodelen; // for "RMB" type instructions |
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87 int addrset; // set if this instruction sets the assembly address |
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88 int symaddr; // set if this instruction sets a symbol addr with EQU or the like |
| 67 | 89 int badop; // bad operation - ignore it |
| 74 | 90 |
| 91 // the following are used for obj format - for external references, inter-section | |
| 92 // references, and intrasection relocations | |
| 93 int relocoff; // offset into insn where relocation value goes | |
| 77 | 94 lwasm_expr_stack_t *exprs[4]; // non-constant expression values |
| 95 int exprvals[4]; // constant expression values | |
| 96 char *exprends[4]; // pointer to character after end of expression | |
| 85 | 97 |
| 98 sectiontab_t *sect; // which section is the line in? | |
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99 }; |
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100 |
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101 // for keeping track of symbols |
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102 #define SYMBOL_SET 1 // the symbol was used for "SET" |
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103 #define SYMBOL_COMPLEX 2 // register symbol as a complex symbol (from l -> expr) |
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104 #define SYMBOL_FORCE 4 // force resetting the symbol value if it already exists on pass 2 |
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105 #define SYMBOL_NORM 0 // no flags |
| 82 | 106 #define SYMBOL_EXTERN 8 // the symbol is an external reference |
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107 typedef struct lwasm_symbol_ent_s lwasm_symbol_ent_t; |
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108 struct lwasm_symbol_ent_s |
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109 { |
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110 char *sym; // the symbol |
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111 int context; // the context number of the symbol (-1 for global) |
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112 int value; // the value of the symbol |
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113 int flags; // flags for the symbol |
| 82 | 114 char *externalname; // for external references that are aliased locally |
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115 sectiontab_t *sect; // the section the symbol exists in; NULL for none |
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116 lwasm_expr_stack_t *expr; // expression for a symbol that is not constant NULL for const |
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117 lwasm_symbol_ent_t *next; // next symbol in the table |
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118 lwasm_symbol_ent_t *prev; // previous symbol in the table |
| 21 | 119 }; |
| 0 | 120 |
| 121 // keep track of current assembler state | |
| 122 typedef struct { | |
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123 int dpval; // current dp value (setdp) |
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124 int addr; // current address |
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125 int context; // context counter (for local symbols) |
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126 int errorcount; // error count |
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127 int passnum; // which pass are we on? |
| 21 | 128 int execaddr; // execution address for the program (END ....) |
| 129 int pragmas; // what pragmas are in effect? | |
| 130 | |
| 131 lwasm_line_t *lineshead; // first line of source code | |
| 132 lwasm_line_t *linestail; // last line of source code | |
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133 |
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134 lwasm_symbol_ent_t *symhead; // first entry in symbol table |
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135 lwasm_symbol_ent_t *symtail; // last entry in symbol table |
| 57 | 136 |
| 137 macrotab_t *macros; // macro table | |
| 21 | 138 |
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139 const char *infile; // input file |
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140 const char *outfile; // output file |
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141 const char *listfile; // output listing file |
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142 int outformat; // output format type |
| 21 | 143 char **filelist; // files that have been read |
| 144 int filelistlen; // number of files in the list | |
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145 |
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146 int endseen; // set to true if "end" has been seen |
| 57 | 147 int skipcond; // skipping a condition? |
| 148 int skipcount; // how many? | |
| 149 int skipmacro; // skipping a macro? | |
| 150 int inmacro; // are we currently in a macro? | |
| 151 int macroex; // current depth of macro expansion | |
| 152 int nextcontext; // next context number | |
| 153 int skiplines; // number of lines to skip | |
| 74 | 154 |
| 155 // items used only for the "object" target | |
| 156 sectiontab_t *sections; // pointer to section table | |
| 157 sectiontab_t *csect; // current section - NULL if not in one | |
| 0 | 158 } asmstate_t; |
| 159 | |
| 160 #define PRAGMA_NOINDEX0TONONE 1 | |
| 161 | |
| 26 | 162 #ifndef __lwasm_c_seen__ |
| 163 #define __lwasm_E__ extern | |
| 164 #else | |
| 165 #define __lwasm_E__ | |
| 166 #endif | |
| 167 | |
| 38 | 168 __lwasm_E__ int debug_level; |
| 169 | |
| 26 | 170 __lwasm_E__ int register_error(asmstate_t *as, lwasm_line_t *l, int pass, const char *fmt, ...); |
| 38 | 171 __lwasm_E__ void debug_message(int level, const char *fmt, ...); |
| 26 | 172 |
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173 __lwasm_E__ void lwasm_emit(asmstate_t *as, lwasm_line_t *l, int b); |
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174 __lwasm_E__ void lwasm_emitop(asmstate_t *as, lwasm_line_t *l, int o); |
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175 __lwasm_E__ int lwasm_lookupreg2(const char *reglist, char **str); |
| 32 | 176 __lwasm_E__ int lwasm_lookupreg3(const char *rlist, const char **str); |
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177 |
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178 __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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179 |
| 55 | 180 |
| 57 | 181 // return next context number and update it |
| 182 __lwasm_E__ int lwasm_next_context(asmstate_t *as); | |
| 183 | |
| 55 | 184 // also throw an error on expression eval failure |
| 76 | 185 // return 0 on ok, -1 on error, 1 if a complex expression was returned |
| 55 | 186 #define EXPR_NOFLAG 0 |
| 76 | 187 #define EXPR_PASS1CONST 1 // no forward references on pass 1 |
| 188 #define EXPR_PASS2CONST 2 // no undefined references on pass 2 | |
| 189 #define EXPR_BYTE 4 // the result must fit within 8 bits | |
| 190 #define EXPR_COMPLEX 8 // a non-constant result is permitted (stored in l -> expr) | |
| 77 | 191 #define EXPR_NOINTERSECT 16 // only allow intra-section values (pass 2) |
| 76 | 192 |
| 55 | 193 __lwasm_E__ int lwasm_expr_result(asmstate_t *as, lwasm_line_t *l, char **inp, int flag, int *val); |
| 77 | 194 __lwasm_E__ int lwasm_expr_result2(asmstate_t *as, lwasm_line_t *l, char **inp, int flag, int *val, int slot); |
| 55 | 195 |
| 26 | 196 #undef __lwasm_E__ |
| 197 | |
| 198 | |
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199 #ifndef __symbol_c_seen__ |
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200 #define __lwasm_E__ extern |
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201 #else |
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202 #define __lwasm_E__ |
| 0 | 203 #endif |
| 204 | |
| 64 | 205 __lwasm_E__ int lwasm_register_symbol(asmstate_t *as, lwasm_line_t *l, char *sym, int val, int flags); |
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206 __lwasm_E__ lwasm_symbol_ent_t *lwasm_find_symbol(asmstate_t *as, char *sym, int scontext); |
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207 __lwasm_E__ int lwasm_set_symbol(asmstate_t *as, char *sym, int scontext, int val); |
| 58 | 208 __lwasm_E__ void lwasm_list_symbols(asmstate_t *as, FILE *f); |
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209 #undef __lwasm_E__ |
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210 |
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211 |
| 0 | 212 |
| 213 #endif //__lwasm_h_seen__ |