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annotate lwasm/main.c @ 182:833d392fec82
Arranged for lwasm and lwlink to remove the output file in case they fail
| author | lost |
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| date | Fri, 06 Mar 2009 01:35:40 +0000 |
| parents | 427e268e876b |
| children | bae1e3ecdce1 |
| 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> | |
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33 #include <unistd.h> |
| 0 | 34 |
| 35 #include "lwasm.h" | |
| 36 | |
| 37 // external declarations | |
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38 extern void lwasm_pass1(asmstate_t *as); |
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39 extern void lwasm_pass2(asmstate_t *as); |
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40 extern void lwasm_list(asmstate_t *as); |
| 46 | 41 extern void lwasm_output(asmstate_t *as); |
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42 extern void pseudo_pragma_real(asmstate_t *as, lwasm_line_t *cl, char **optr, int error); |
| 0 | 43 |
| 44 // command line option handling | |
| 142 | 45 const char *argp_program_version = "LWASM from " PACKAGE_STRING; |
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46 const char *argp_program_bug_address = PACKAGE_BUGREPORT; |
| 0 | 47 |
| 48 static error_t parse_opts(int key, char *arg, struct argp_state *state) | |
| 49 { | |
| 50 asmstate_t *as = state -> input; | |
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51 char *p; |
| 0 | 52 |
| 53 switch (key) | |
| 54 { | |
| 55 case 'o': | |
| 56 // output | |
| 57 if (as -> outfile) | |
| 58 { | |
| 59 } | |
| 60 as -> outfile = arg; | |
| 61 break; | |
| 62 | |
| 63 case 'd': | |
| 64 // debug | |
| 38 | 65 debug_level++; |
| 0 | 66 break; |
| 67 | |
| 68 case 'l': | |
| 69 // list | |
| 70 if (arg) | |
| 71 as -> listfile = arg; | |
| 72 else | |
| 73 as -> listfile = "-"; | |
| 74 break; | |
| 75 | |
| 76 case 'b': | |
| 77 // decb output | |
| 78 as -> outformat = OUTPUT_DECB; | |
| 79 break; | |
| 80 | |
| 81 case 'r': | |
| 82 // raw binary output | |
| 83 as -> outformat = OUTPUT_RAW; | |
| 84 break; | |
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85 |
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86 case 0x100: |
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87 // proprietary object format |
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88 as -> outformat = OUTPUT_OBJ; |
| 19 | 89 break; |
| 90 | |
| 91 case 'f': | |
| 92 // output format | |
| 93 if (!strcasecmp(arg, "decb")) | |
| 94 as -> outformat = OUTPUT_DECB; | |
| 95 else if (!strcasecmp(arg, "raw")) | |
| 96 as -> outformat = OUTPUT_RAW; | |
| 97 else if (!strcasecmp(arg, "obj")) | |
| 98 as -> outformat = OUTPUT_OBJ; | |
| 99 else | |
| 100 { | |
| 101 fprintf(stderr, "Invalid output format: %s\n", arg); | |
| 102 exit(1); | |
| 103 } | |
| 104 break; | |
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105 |
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106 case 'p': |
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107 // pragmas |
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108 p = arg; |
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109 pseudo_pragma_real(as, NULL, &p, 2); |
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110 if (!p) |
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111 { |
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112 fprintf(stderr, "Invalid pragma string: %s\n", arg); |
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113 exit(1); |
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114 } |
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115 break; |
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116 |
| 0 | 117 case ARGP_KEY_END: |
| 118 // done; sanity check | |
| 119 if (!as -> outfile) | |
| 120 as -> outfile = "a.out"; | |
| 121 break; | |
| 122 | |
| 123 case ARGP_KEY_ARG: | |
| 124 // non-option arg | |
| 125 if (as -> infile) | |
| 126 argp_usage(state); | |
| 127 as -> infile = arg; | |
| 128 break; | |
| 129 | |
| 130 default: | |
| 131 return ARGP_ERR_UNKNOWN; | |
| 132 } | |
| 133 return 0; | |
| 134 } | |
| 135 | |
| 136 static struct argp_option options[] = | |
| 137 { | |
| 138 { "output", 'o', "FILE", 0, | |
| 139 "Output to FILE"}, | |
| 140 { "debug", 'd', 0, 0, | |
| 141 "Set debug mode"}, | |
| 19 | 142 { "format", 'f', "TYPE", 0, |
| 143 "Select output format: decb, raw, obj"}, | |
| 0 | 144 { "list", 'l', "FILE", OPTION_ARG_OPTIONAL, |
| 145 "Generate list [to FILE]"}, | |
| 146 { "decb", 'b', 0, 0, | |
| 19 | 147 "Generate DECB .bin format output, equivalent of --format=decb"}, |
| 0 | 148 { "raw", 'r', 0, 0, |
| 19 | 149 "Generate raw binary format output, equivalent of --format=raw"}, |
| 74 | 150 { "obj", 0x100, 0, 0, |
| 19 | 151 "Generate proprietary object file format for later linking, equivalent of --format=obj" }, |
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152 { "pragma", 'p', "PRAGMA", 0, |
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153 "Set an assembler pragma to any value understood by the \"pragma\" pseudo op"}, |
| 0 | 154 { 0 } |
| 155 }; | |
| 156 | |
| 157 static struct argp argp = | |
| 158 { | |
| 159 options, | |
| 160 parse_opts, | |
| 161 "<input file>", | |
| 162 "LWASM, a HD6309 and MC6809 cross-assembler" | |
| 163 }; | |
| 164 | |
| 165 // main function; parse command line, set up assembler state, and run the | |
| 166 // assembler on the first file | |
| 167 int main(int argc, char **argv) | |
| 168 { | |
| 169 // assembler state | |
| 170 asmstate_t asmstate = { 0 }; | |
| 171 | |
| 172 argp_parse(&argp, argc, argv, 0, 0, &asmstate); | |
| 173 | |
| 19 | 174 if (!asmstate.infile) |
| 175 { | |
| 176 fprintf(stderr, "No input files specified.\n"); | |
| 177 exit(1); | |
| 178 } | |
| 179 | |
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180 // lose the output file if it already exists... |
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181 unlink(asmstate.outfile); |
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182 |
| 0 | 183 /* pass 1 - collect the symbols and assign addresses where possible */ |
| 184 /* pass 1 also resolves included files, etc. */ | |
| 185 /* that means files are read exactly once unless included multiple times */ | |
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186 lwasm_pass1(&asmstate); |
| 0 | 187 |
| 188 // pass 2: actually generate the code; if any phasing errors appear | |
| 189 // at this stage, we have a bug | |
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190 lwasm_pass2(&asmstate); |
| 0 | 191 |
| 192 // now make a pretty listing | |
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193 lwasm_list(&asmstate); |
| 0 | 194 |
| 195 // now write the code out to the output file | |
| 46 | 196 lwasm_output(&asmstate); |
| 0 | 197 |
| 198 if (asmstate.errorcount > 0) | |
| 199 exit(1); | |
| 200 | |
| 201 exit(0); | |
| 202 } | |
| 203 |