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1 /*
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2 main.c
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3
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4 Implements the program startup code
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5
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6 */
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7
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8 #include <argp.h>
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9 #include <errno.h>
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10 #include <stdio.h>
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11 #include <stdlib.h>
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12
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13 #include "lwasm.h"
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14
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15 // external declarations
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16 extern void resolve_phasing(asmstate_t *as);
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17 extern void generate_code(asmstate_t *as);
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18 extern void list_code(asmstate_t *as);
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19 extern void write_code(asmstate_t *as);
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20
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21
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22 // command line option handling
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23 const char *argp_program_version = "LWASM Version 0.0";
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24 const char *argp_program_bug_address = "lost@l-w.ca";
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25
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26 static error_t parse_opts(int key, char *arg, struct argp_state *state)
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27 {
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28 asmstate_t *as = state -> input;
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29
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30 switch (key)
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31 {
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32 case 'o':
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33 // output
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34 if (as -> outfile)
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35 {
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36 }
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37 as -> outfile = arg;
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38 break;
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39
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40 case 'd':
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41 // debug
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42 as -> debug++;
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43 break;
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44
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45 case 'l':
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46 // list
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47 if (arg)
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48 as -> listfile = arg;
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49 else
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50 as -> listfile = "-";
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51 break;
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52
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53 case 'b':
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54 // decb output
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55 as -> outformat = OUTPUT_DECB;
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56 break;
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57
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58 case 'r':
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59 // raw binary output
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60 as -> outformat = OUTPUT_RAW;
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61 break;
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62
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63 case ARGP_KEY_END:
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64 // done; sanity check
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65 if (!as -> outfile)
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66 as -> outfile = "a.out";
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67 break;
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68
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69 case ARGP_KEY_ARG:
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70 // non-option arg
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71 if (as -> infile)
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72 argp_usage(state);
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73 as -> infile = arg;
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74 break;
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75
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76 default:
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77 return ARGP_ERR_UNKNOWN;
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78 }
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79 return 0;
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80 }
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81
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82 static struct argp_option options[] =
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83 {
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84 { "output", 'o', "FILE", 0,
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85 "Output to FILE"},
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86 { "debug", 'd', 0, 0,
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87 "Set debug mode"},
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88 { "list", 'l', "FILE", OPTION_ARG_OPTIONAL,
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89 "Generate list [to FILE]"},
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90 { "decb", 'b', 0, 0,
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91 "Generate DECB .bin format output"},
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92 { "raw", 'r', 0, 0,
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93 "Generate raw binary format output"},
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94 { "rawrel", 0, 0, 0,
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95 "Generate raw binary respecing ORG statements as offsets from the start of the file"},
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96 { 0 }
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97 };
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98
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99 static struct argp argp =
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100 {
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101 options,
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102 parse_opts,
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103 "<input file>",
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104 "LWASM, a HD6309 and MC6809 cross-assembler"
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105 };
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106
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107 // main function; parse command line, set up assembler state, and run the
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108 // assembler on the first file
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109 int main(int argc, char **argv)
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110 {
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111 // assembler state
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112 asmstate_t asmstate = { 0 };
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113
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114 argp_parse(&argp, argc, argv, 0, 0, &asmstate);
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115 if (!asmstate.listfile)
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116 asmstate.listfile = "-";
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117
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118 // printf("Assembling %s to %s; list to %s\n", asmstate.infile, asmstate.outfile, asmstate.listfile);
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119
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120 /* pass 1 - collect the symbols and assign addresses where possible */
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121 /* pass 1 also resolves included files, etc. */
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122 /* that means files are read exactly once unless included multiple times */
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123 lwasm_read_file(&asmstate, (char *)(asmstate.infile));
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124
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125 // pass 2: actually generate the code; if any phasing errors appear
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126 // at this stage, we have a bug
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127 generate_code(&asmstate);
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128
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129 // now make a pretty listing
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130 list_code(&asmstate);
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131
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132 // now write the code out to the output file
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133 write_code(&asmstate);
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134
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135 if (asmstate.errorcount > 0)
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136 exit(1);
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137
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138 exit(0);
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139 }
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140
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