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annotate src/main.c @ 143:0ee5f65bccf9
Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option
| author | lost |
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| date | Thu, 29 Jan 2009 01:32:11 +0000 |
| parents | 36ca3fa755e0 |
| children |
| rev | line source |
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| 0 | 1 /* |
| 2 main.c | |
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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 |
| 0 | 20 |
| 21 Implements the program startup code | |
| 22 | |
| 23 */ | |
| 24 | |
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25 #ifdef HAVE_CONFIG_H |
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26 #include "config.h" |
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27 #endif |
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28 |
| 0 | 29 #include <argp.h> |
| 30 #include <errno.h> | |
| 31 #include <stdio.h> | |
| 32 #include <stdlib.h> | |
| 33 | |
| 34 #include "lwasm.h" | |
| 35 | |
| 36 // external declarations | |
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37 extern void lwasm_pass1(asmstate_t *as); |
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38 extern void lwasm_pass2(asmstate_t *as); |
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39 extern void lwasm_list(asmstate_t *as); |
| 46 | 40 extern void lwasm_output(asmstate_t *as); |
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143
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41 extern void pseudo_pragma_real(asmstate_t *as, lwasm_line_t *cl, char **optr, int error); |
| 0 | 42 |
| 43 // command line option handling | |
| 142 | 44 const char *argp_program_version = "LWASM from " PACKAGE_STRING; |
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45 const char *argp_program_bug_address = PACKAGE_BUGREPORT; |
| 0 | 46 |
| 47 static error_t parse_opts(int key, char *arg, struct argp_state *state) | |
| 48 { | |
| 49 asmstate_t *as = state -> input; | |
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50 char *p; |
| 0 | 51 |
| 52 switch (key) | |
| 53 { | |
| 54 case 'o': | |
| 55 // output | |
| 56 if (as -> outfile) | |
| 57 { | |
| 58 } | |
| 59 as -> outfile = arg; | |
| 60 break; | |
| 61 | |
| 62 case 'd': | |
| 63 // debug | |
| 38 | 64 debug_level++; |
| 0 | 65 break; |
| 66 | |
| 67 case 'l': | |
| 68 // list | |
| 69 if (arg) | |
| 70 as -> listfile = arg; | |
| 71 else | |
| 72 as -> listfile = "-"; | |
| 73 break; | |
| 74 | |
| 75 case 'b': | |
| 76 // decb output | |
| 77 as -> outformat = OUTPUT_DECB; | |
| 78 break; | |
| 79 | |
| 80 case 'r': | |
| 81 // raw binary output | |
| 82 as -> outformat = OUTPUT_RAW; | |
| 83 break; | |
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84 |
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85 case 0x100: |
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86 // proprietary object format |
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87 as -> outformat = OUTPUT_OBJ; |
| 19 | 88 break; |
| 89 | |
| 90 case 'f': | |
| 91 // output format | |
| 92 if (!strcasecmp(arg, "decb")) | |
| 93 as -> outformat = OUTPUT_DECB; | |
| 94 else if (!strcasecmp(arg, "raw")) | |
| 95 as -> outformat = OUTPUT_RAW; | |
| 96 else if (!strcasecmp(arg, "obj")) | |
| 97 as -> outformat = OUTPUT_OBJ; | |
| 98 else | |
| 99 { | |
| 100 fprintf(stderr, "Invalid output format: %s\n", arg); | |
| 101 exit(1); | |
| 102 } | |
| 103 break; | |
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104 |
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105 case 'p': |
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106 // pragmas |
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107 p = arg; |
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108 pseudo_pragma_real(as, NULL, &p, 2); |
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109 if (!p) |
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110 { |
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111 fprintf(stderr, "Invalid pragma string: %s\n", arg); |
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112 exit(1); |
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113 } |
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114 break; |
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115 |
| 0 | 116 case ARGP_KEY_END: |
| 117 // done; sanity check | |
| 118 if (!as -> outfile) | |
| 119 as -> outfile = "a.out"; | |
| 120 break; | |
| 121 | |
| 122 case ARGP_KEY_ARG: | |
| 123 // non-option arg | |
| 124 if (as -> infile) | |
| 125 argp_usage(state); | |
| 126 as -> infile = arg; | |
| 127 break; | |
| 128 | |
| 129 default: | |
| 130 return ARGP_ERR_UNKNOWN; | |
| 131 } | |
| 132 return 0; | |
| 133 } | |
| 134 | |
| 135 static struct argp_option options[] = | |
| 136 { | |
| 137 { "output", 'o', "FILE", 0, | |
| 138 "Output to FILE"}, | |
| 139 { "debug", 'd', 0, 0, | |
| 140 "Set debug mode"}, | |
| 19 | 141 { "format", 'f', "TYPE", 0, |
| 142 "Select output format: decb, raw, obj"}, | |
| 0 | 143 { "list", 'l', "FILE", OPTION_ARG_OPTIONAL, |
| 144 "Generate list [to FILE]"}, | |
| 145 { "decb", 'b', 0, 0, | |
| 19 | 146 "Generate DECB .bin format output, equivalent of --format=decb"}, |
| 0 | 147 { "raw", 'r', 0, 0, |
| 19 | 148 "Generate raw binary format output, equivalent of --format=raw"}, |
| 74 | 149 { "obj", 0x100, 0, 0, |
| 19 | 150 "Generate proprietary object file format for later linking, equivalent of --format=obj" }, |
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151 { "pragma", 'p', "PRAGMA", 0, |
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152 "Set an assembler pragma to any value understood by the \"pragma\" pseudo op"}, |
| 0 | 153 { 0 } |
| 154 }; | |
| 155 | |
| 156 static struct argp argp = | |
| 157 { | |
| 158 options, | |
| 159 parse_opts, | |
| 160 "<input file>", | |
| 161 "LWASM, a HD6309 and MC6809 cross-assembler" | |
| 162 }; | |
| 163 | |
| 164 // main function; parse command line, set up assembler state, and run the | |
| 165 // assembler on the first file | |
| 166 int main(int argc, char **argv) | |
| 167 { | |
| 168 // assembler state | |
| 169 asmstate_t asmstate = { 0 }; | |
| 170 | |
| 171 argp_parse(&argp, argc, argv, 0, 0, &asmstate); | |
| 172 | |
| 19 | 173 if (!asmstate.infile) |
| 174 { | |
| 175 fprintf(stderr, "No input files specified.\n"); | |
| 176 exit(1); | |
| 177 } | |
| 178 | |
| 0 | 179 /* pass 1 - collect the symbols and assign addresses where possible */ |
| 180 /* pass 1 also resolves included files, etc. */ | |
| 181 /* that means files are read exactly once unless included multiple times */ | |
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182 lwasm_pass1(&asmstate); |
| 0 | 183 |
| 184 // pass 2: actually generate the code; if any phasing errors appear | |
| 185 // at this stage, we have a bug | |
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186 lwasm_pass2(&asmstate); |
| 0 | 187 |
| 188 // now make a pretty listing | |
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189 lwasm_list(&asmstate); |
| 0 | 190 |
| 191 // now write the code out to the output file | |
| 46 | 192 lwasm_output(&asmstate); |
| 0 | 193 |
| 194 if (asmstate.errorcount > 0) | |
| 195 exit(1); | |
| 196 | |
| 197 exit(0); | |
| 198 } | |
| 199 |