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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * crt1.c |
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| 3 | * This file has no copyright assigned and is placed in the Public Domain. |
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| 4 | * This file is a part of the mingw-runtime package. |
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| 5 | * No warranty is given; refer to the file DISCLAIMER within the package. |
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| 6 | * |
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| 7 | * Source code for the startup proceedures used by all programs. This code |
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| 8 | * is compiled to make crt1.o, which should be located in the library path. |
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| 9 | * |
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| 10 | */ |
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| 11 | |||
| 12 | /* Hide the declaration of _fmode with dllimport attribute in stdlib.h to |
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| 13 | avoid problems with older GCC. */ |
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| 14 | |||
| 15 | #include |
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| 16 | #include |
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| 17 | #include |
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| 18 | #include |
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| 19 | #include |
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| 20 | #include |
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| 21 | |||
| 6068 | serge | 22 | struct app_hdr |
| 23 | { |
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| 24 | char banner[8]; |
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| 25 | int version; |
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| 26 | int start; |
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| 27 | int iend; |
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| 28 | int memsize; |
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| 29 | int stacktop; |
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| 30 | char *cmdline; |
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| 31 | char *path; |
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| 32 | }; |
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| 4349 | Serge | 33 | |
| 6068 | serge | 34 | extern int main (int, char **, char **); |
| 4349 | Serge | 35 | |
| 36 | /* NOTE: The code for initializing the _argv, _argc, and environ variables |
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| 37 | * has been moved to a separate .c file which is included in both |
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| 38 | * crt1.c and dllcrt1.c. This means changes in the code don't have to |
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| 39 | * be manually synchronized, but it does lead to this not-generally- |
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| 40 | * a-good-idea use of include. */ |
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| 41 | |||
| 6068 | serge | 42 | char* __appenv; |
| 43 | int __appenv_size; |
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| 4349 | Serge | 44 | |
| 6068 | serge | 45 | extern char _tls_map[128]; |
| 4349 | Serge | 46 | |
| 6068 | serge | 47 | char * __libc_getenv(const char *name) |
| 48 | { |
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| 49 | return NULL; |
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| 50 | } |
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| 4349 | Serge | 51 | |
| 6068 | serge | 52 | static int split_cmdline(char *cmdline, char **argv) |
| 53 | { |
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| 54 | enum quote_state |
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| 55 | { |
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| 56 | QUOTE_NONE, /* no " active in current parm */ |
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| 57 | QUOTE_DELIMITER, /* " was first char and must be last */ |
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| 58 | QUOTE_STARTED /* " was seen, look for a match */ |
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| 59 | }; |
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| 4349 | Serge | 60 | |
| 6068 | serge | 61 | enum quote_state state; |
| 62 | unsigned int argc; |
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| 63 | char *p = cmdline; |
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| 64 | char *new_arg, *start; |
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| 4349 | Serge | 65 | |
| 6068 | serge | 66 | argc = 0; |
| 4349 | Serge | 67 | |
| 6068 | serge | 68 | for(;;) |
| 69 | { |
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| 70 | /* skip over spaces and tabs */ |
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| 71 | if ( *p ) |
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| 72 | { |
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| 73 | while (*p == ' ' || *p == '\t') |
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| 74 | ++p; |
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| 75 | } |
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| 4349 | Serge | 76 | |
| 6068 | serge | 77 | if (*p == '\0') |
| 78 | break; |
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| 4349 | Serge | 79 | |
| 6068 | serge | 80 | state = QUOTE_NONE; |
| 81 | if( *p == '\"' ) |
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| 82 | { |
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| 83 | p++; |
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| 84 | state = QUOTE_DELIMITER; |
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| 85 | } |
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| 86 | new_arg = start = p; |
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| 87 | for (;;) |
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| 88 | { |
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| 89 | if( *p == '\"' ) |
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| 90 | { |
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| 91 | p++; |
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| 92 | if( state == QUOTE_NONE ) |
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| 93 | { |
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| 94 | state = QUOTE_STARTED; |
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| 95 | } |
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| 96 | else |
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| 97 | { |
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| 98 | state = QUOTE_NONE; |
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| 99 | } |
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| 100 | continue; |
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| 101 | } |
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| 4349 | Serge | 102 | |
| 6068 | serge | 103 | if( *p == ' ' || *p == '\t' ) |
| 104 | { |
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| 105 | if( state == QUOTE_NONE ) |
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| 106 | { |
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| 107 | break; |
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| 108 | } |
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| 109 | } |
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| 4349 | Serge | 110 | |
| 6068 | serge | 111 | if( *p == '\0' ) |
| 112 | break; |
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| 4349 | Serge | 113 | |
| 6068 | serge | 114 | if( *p == '\\' ) |
| 115 | { |
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| 116 | if( p[1] == '\"' ) |
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| 117 | { |
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| 118 | ++p; |
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| 119 | if( p[-2] == '\\' ) |
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| 120 | { |
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| 121 | continue; |
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| 122 | } |
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| 123 | } |
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| 124 | } |
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| 125 | if( argv ) |
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| 126 | { |
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| 127 | *(new_arg++) = *p; |
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| 128 | } |
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| 129 | ++p; |
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| 130 | }; |
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| 131 | |||
| 132 | if( argv ) |
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| 133 | { |
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| 134 | argv[ argc ] = start; |
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| 135 | ++argc; |
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| 136 | |||
| 137 | /* |
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| 138 | The *new = '\0' is req'd in case there was a \" to " |
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| 139 | translation. It must be after the *p check against |
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| 140 | '\0' because new and p could point to the same char |
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| 141 | in which case the scan would be terminated too soon. |
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| 142 | */ |
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| 143 | |||
| 144 | if( *p == '\0' ) |
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| 145 | { |
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| 146 | *new_arg = '\0'; |
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| 147 | break; |
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| 148 | } |
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| 149 | *new_arg = '\0'; |
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| 150 | ++p; |
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| 151 | } |
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| 152 | else |
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| 153 | { |
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| 154 | ++argc; |
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| 155 | if( *p == '\0' ) |
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| 156 | { |
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| 157 | break; |
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| 158 | } |
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| 159 | ++p; |
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| 160 | } |
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| 4349 | Serge | 161 | } |
| 162 | |||
| 6068 | serge | 163 | return argc; |
| 164 | }; |
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| 165 | |||
| 4349 | Serge | 166 | void __attribute__((noreturn)) |
| 167 | __crt_startup (void) |
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| 168 | { |
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| 6068 | serge | 169 | struct app_hdr *header = NULL; |
| 170 | int retval = 0; |
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| 4349 | Serge | 171 | |
| 6068 | serge | 172 | char **argv; |
| 173 | int argc; |
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| 4349 | Serge | 174 | |
| 6068 | serge | 175 | memset(_tls_map, 0xFF, 32*4); |
| 176 | _tls_map[0] = 0xE0; |
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| 177 | init_reent(); |
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| 178 | init_stdio(); |
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| 4349 | Serge | 179 | |
| 180 | |||
| 6068 | serge | 181 | if( header->cmdline[0] != 0) |
| 182 | { |
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| 183 | argc = split_cmdline(header->cmdline, NULL) + 1; |
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| 184 | argv = alloca((argc+1)*sizeof(char*)); |
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| 185 | argv[0] = header->path; |
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| 4349 | Serge | 186 | |
| 6068 | serge | 187 | split_cmdline(header->cmdline, argv + 1); |
| 188 | } |
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| 189 | else |
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| 4349 | Serge | 190 | { |
| 6068 | serge | 191 | argc = 1; |
| 192 | argv = alloca((argc+1)*sizeof(char*)); |
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| 193 | argv[0] = header->path; |
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| 194 | } |
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| 195 | argv[argc] = NULL; |
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| 4349 | Serge | 196 | |
| 6068 | serge | 197 | retval = main(argc, argv, NULL); |
| 198 | done: |
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| 199 | exit (retval); |
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| 4349 | Serge | 200 | } |
| 201 |