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annotate src/lwasm.h @ 57:035b95a3690f
Added conditional assembly and macros
author | lost |
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date | Mon, 05 Jan 2009 00:01:21 +0000 |
parents | 8e32696380f3 |
children | b1d81800bc91 |
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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 | |
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27 #include "expr.h" |
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28 |
0 | 29 #define OUTPUT_DECB 0 // DECB multirecord format |
30 #define OUTPUT_RAW 1 // raw sequence of bytes | |
21 | 31 #define OUTPUT_OBJ 2 // proprietary object file format |
46 | 32 #define OUTPUT_RAWREL 3 // raw bytes where ORG causes a SEEK in the file |
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33 |
57 | 34 // structure for tracking macros |
35 typedef struct macrotab_s macrotab_t; | |
36 struct macrotab_s | |
37 { | |
38 char *name; | |
39 char **lines; | |
40 int numlines; | |
41 macrotab_t *next; | |
42 }; | |
43 | |
26 | 44 // structure for tracking errors |
45 typedef struct lwasm_error_s lwasm_error_t; | |
46 struct lwasm_error_s | |
47 { | |
48 char *mess; // the actual error message | |
49 lwasm_error_t *next; // ptr to next error | |
50 }; | |
51 | |
21 | 52 // structure for keeping track of lines |
53 typedef struct lwasm_line_s lwasm_line_t; | |
54 struct lwasm_line_s { | |
55 char *text; // the actual text of the line | |
56 int lineno; // line number within the file | |
57 char *filename; // file name reference | |
58 lwasm_line_t *next; // next line | |
59 lwasm_line_t *prev; // previous line | |
26 | 60 lwasm_error_t *err; // error messages |
28 | 61 int fsize; // forced size (0 = no forced size) |
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62 char *sym; // scratch area to record the presence of a symbol |
42 | 63 unsigned char *bytes; // actual bytes emitted |
64 int codelen; // number of bytes emitted | |
65 int codesize; // the size of the code buffer | |
44 | 66 int codeaddr; // address the code goes at |
46 | 67 int nocodelen; // for "RMB" type instructions |
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68 int addrset; // set if this instruction sets the assembly address |
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69 int symaddr; // set if this instruction sets a symbol addr with EQU or the like |
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70 }; |
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71 |
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72 // for keeping track of symbols |
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73 typedef struct lwasm_symbol_ent_s lwasm_symbol_ent_t; |
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74 struct lwasm_symbol_ent_s |
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75 { |
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76 char *sym; // the symbol |
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77 int context; // the context number of the symbol (-1 for global) |
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78 int value; // the value of the symbol |
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79 lwasm_symbol_ent_t *next; // next symbol in the table |
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80 lwasm_symbol_ent_t *prev; // previous symbol in the table |
21 | 81 }; |
0 | 82 |
83 // keep track of current assembler state | |
84 typedef struct { | |
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85 int dpval; // current dp value (setdp) |
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86 int addr; // current address |
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87 int context; // context counter (for local symbols) |
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88 int errorcount; // error count |
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89 int passnum; // which pass are we on? |
21 | 90 int execaddr; // execution address for the program (END ....) |
91 int pragmas; // what pragmas are in effect? | |
92 | |
93 lwasm_line_t *lineshead; // first line of source code | |
94 lwasm_line_t *linestail; // last line of source code | |
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95 |
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96 lwasm_symbol_ent_t *symhead; // first entry in symbol table |
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97 lwasm_symbol_ent_t *symtail; // last entry in symbol table |
57 | 98 |
99 macrotab_t *macros; // macro table | |
21 | 100 |
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101 const char *infile; // input file |
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102 const char *outfile; // output file |
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103 const char *listfile; // output listing file |
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104 int outformat; // output format type |
21 | 105 char **filelist; // files that have been read |
106 int filelistlen; // number of files in the list | |
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107 |
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108 int endseen; // set to true if "end" has been seen |
57 | 109 int skipcond; // skipping a condition? |
110 int skipcount; // how many? | |
111 int skipmacro; // skipping a macro? | |
112 int inmacro; // are we currently in a macro? | |
113 int macroex; // current depth of macro expansion | |
114 int nextcontext; // next context number | |
115 int skiplines; // number of lines to skip | |
0 | 116 } asmstate_t; |
117 | |
118 #define PRAGMA_NOINDEX0TONONE 1 | |
119 | |
26 | 120 #ifndef __lwasm_c_seen__ |
121 #define __lwasm_E__ extern | |
122 #else | |
123 #define __lwasm_E__ | |
124 #endif | |
125 | |
38 | 126 __lwasm_E__ int debug_level; |
127 | |
26 | 128 __lwasm_E__ int register_error(asmstate_t *as, lwasm_line_t *l, int pass, const char *fmt, ...); |
38 | 129 __lwasm_E__ void debug_message(int level, const char *fmt, ...); |
26 | 130 |
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131 __lwasm_E__ void lwasm_emit(asmstate_t *as, lwasm_line_t *l, int b); |
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132 __lwasm_E__ void lwasm_emitop(asmstate_t *as, lwasm_line_t *l, int o); |
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133 __lwasm_E__ int lwasm_lookupreg2(const char *reglist, char **str); |
32 | 134 __lwasm_E__ int lwasm_lookupreg3(const char *rlist, const char **str); |
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135 |
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136 __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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137 |
55 | 138 |
57 | 139 // return next context number and update it |
140 __lwasm_E__ int lwasm_next_context(asmstate_t *as); | |
141 | |
55 | 142 // also throw an error on expression eval failure |
143 // return 0 on ok, -1 on error | |
144 #define EXPR_NOFLAG 0 | |
145 #define EXPR_PASS1CONST 1 | |
146 #define EXPR_PASS2CONST 2 | |
147 #define EXPR_BYTE 4 | |
148 __lwasm_E__ int lwasm_expr_result(asmstate_t *as, lwasm_line_t *l, char **inp, int flag, int *val); | |
149 | |
26 | 150 #undef __lwasm_E__ |
151 | |
152 | |
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153 #ifndef __symbol_c_seen__ |
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154 #define __lwasm_E__ extern |
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155 #else |
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156 #define __lwasm_E__ |
0 | 157 #endif |
158 | |
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159 __lwasm_E__ int lwasm_register_symbol(asmstate_t *as, lwasm_line_t *l, char *sym, int val); |
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160 __lwasm_E__ lwasm_symbol_ent_t *lwasm_find_symbol(asmstate_t *as, char *sym, int scontext); |
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161 __lwasm_E__ int lwasm_set_symbol(asmstate_t *as, char *sym, int scontext, int val); |
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162 |
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163 #undef __lwasm_E__ |
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164 |
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165 |
0 | 166 |
167 #endif //__lwasm_h_seen__ |