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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6068 | serge | 1 | /* |
| 2 | * crtdll.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 shared libc startup proceedures. This code is compiled |
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| 8 | * to make libc.dll, which should be located in the library path. |
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| 9 | * |
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| 10 | */ |
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| 4349 | Serge | 11 | |
| 12 | #include <_ansi.h> |
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| 13 | #include |
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| 14 | #include |
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| 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 | |||
| 22 | struct app_hdr |
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| 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 | int reserved; |
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| 33 | void *__idata_start; |
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| 34 | void *__idata_end; |
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| 35 | int (*main)(int argc, char **argv, char **envp); |
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| 36 | }; |
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| 37 | |||
| 5190 | serge | 38 | void _pei386_runtime_relocator (void); |
| 39 | void init_loader(void *libc_image); |
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| 40 | void init_reent(); |
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| 4349 | Serge | 41 | |
| 5190 | serge | 42 | int link_app(); |
| 4349 | Serge | 43 | void* get_entry_point(void *raw); |
| 44 | int (*entry)(int, char **, char **); |
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| 45 | |||
| 5190 | serge | 46 | char* __appenv; |
| 47 | int __appenv_size; |
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| 4349 | Serge | 48 | |
| 5190 | serge | 49 | extern char _tls_map[128]; |
| 4349 | Serge | 50 | |
| 51 | char * __libc_getenv(const char *name) |
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| 52 | { |
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| 53 | return NULL; |
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| 54 | } |
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| 55 | |||
| 5190 | serge | 56 | static int split_cmdline(char *cmdline, char **argv) |
| 57 | { |
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| 58 | enum quote_state |
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| 59 | { |
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| 60 | QUOTE_NONE, /* no " active in current parm */ |
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| 61 | QUOTE_DELIMITER, /* " was first char and must be last */ |
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| 62 | QUOTE_STARTED /* " was seen, look for a match */ |
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| 63 | }; |
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| 4349 | Serge | 64 | |
| 5190 | serge | 65 | enum quote_state state; |
| 66 | unsigned int argc; |
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| 67 | char *p = cmdline; |
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| 68 | char *new_arg, *start; |
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| 4349 | Serge | 69 | |
| 5190 | serge | 70 | argc = 0; |
| 4349 | Serge | 71 | |
| 5190 | serge | 72 | for(;;) |
| 73 | { |
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| 74 | /* skip over spaces and tabs */ |
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| 75 | if ( *p ) |
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| 76 | { |
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| 77 | while (*p == ' ' || *p == '\t') |
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| 78 | ++p; |
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| 79 | } |
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| 4349 | Serge | 80 | |
| 5190 | serge | 81 | if (*p == '\0') |
| 82 | break; |
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| 83 | |||
| 84 | state = QUOTE_NONE; |
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| 85 | if( *p == '\"' ) |
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| 86 | { |
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| 87 | p++; |
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| 88 | state = QUOTE_DELIMITER; |
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| 89 | } |
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| 90 | new_arg = start = p; |
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| 91 | for (;;) |
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| 92 | { |
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| 93 | if( *p == '\"' ) |
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| 94 | { |
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| 95 | p++; |
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| 96 | if( state == QUOTE_NONE ) |
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| 97 | { |
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| 98 | state = QUOTE_STARTED; |
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| 99 | } |
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| 100 | else |
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| 101 | { |
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| 102 | state = QUOTE_NONE; |
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| 103 | } |
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| 104 | continue; |
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| 105 | } |
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| 106 | |||
| 107 | if( *p == ' ' || *p == '\t' ) |
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| 108 | { |
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| 109 | if( state == QUOTE_NONE ) |
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| 110 | { |
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| 111 | break; |
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| 112 | } |
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| 113 | } |
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| 114 | |||
| 115 | if( *p == '\0' ) |
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| 116 | break; |
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| 117 | |||
| 118 | if( *p == '\\' ) |
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| 119 | { |
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| 120 | if( p[1] == '\"' ) |
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| 121 | { |
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| 122 | ++p; |
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| 123 | if( p[-2] == '\\' ) |
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| 124 | { |
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| 125 | continue; |
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| 126 | } |
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| 127 | } |
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| 128 | } |
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| 129 | if( argv ) |
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| 130 | { |
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| 131 | *(new_arg++) = *p; |
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| 132 | } |
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| 133 | ++p; |
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| 134 | }; |
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| 135 | |||
| 136 | if( argv ) |
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| 137 | { |
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| 138 | argv[ argc ] = start; |
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| 139 | ++argc; |
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| 140 | |||
| 141 | /* |
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| 142 | The *new = '\0' is req'd in case there was a \" to " |
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| 143 | translation. It must be after the *p check against |
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| 144 | '\0' because new and p could point to the same char |
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| 145 | in which case the scan would be terminated too soon. |
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| 146 | */ |
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| 147 | |||
| 148 | if( *p == '\0' ) |
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| 149 | { |
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| 150 | *new_arg = '\0'; |
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| 151 | break; |
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| 152 | } |
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| 153 | *new_arg = '\0'; |
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| 154 | ++p; |
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| 155 | } |
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| 156 | else |
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| 157 | { |
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| 158 | ++argc; |
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| 159 | if( *p == '\0' ) |
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| 160 | { |
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| 161 | break; |
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| 162 | } |
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| 163 | ++p; |
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| 164 | } |
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| 165 | } |
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| 166 | |||
| 167 | return argc; |
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| 168 | }; |
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| 169 | |||
| 4349 | Serge | 170 | void __attribute__((noreturn)) |
| 171 | libc_crt_startup (void *libc_base) |
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| 172 | { |
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| 173 | struct app_hdr *header = NULL; |
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| 5190 | serge | 174 | int retval = 0; |
| 4349 | Serge | 175 | |
| 5190 | serge | 176 | char **argv; |
| 177 | int argc; |
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| 4349 | Serge | 178 | |
| 179 | _pei386_runtime_relocator(); |
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| 180 | |||
| 181 | memset(_tls_map, 0xFF, 32*4); |
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| 182 | _tls_map[0] = 0xE0; |
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| 183 | init_reent(); |
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| 4921 | Serge | 184 | init_stdio(); |
| 6068 | serge | 185 | __do_global_ctors(); |
| 4349 | Serge | 186 | |
| 187 | // __appenv = load_file("/sys/system.env", &__appenv_size); |
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| 188 | |||
| 189 | init_loader(libc_base); |
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| 190 | |||
| 191 | if( link_app() == 0) |
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| 192 | goto done; |
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| 193 | |||
| 194 | if( header->cmdline[0] != 0) |
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| 195 | { |
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| 5190 | serge | 196 | argc = split_cmdline(header->cmdline, NULL) + 1; |
| 197 | argv = alloca((argc+1)*sizeof(char*)); |
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| 198 | argv[0] = header->path; |
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| 199 | |||
| 200 | split_cmdline(header->cmdline, argv + 1); |
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| 4349 | Serge | 201 | } |
| 5190 | serge | 202 | else |
| 203 | { |
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| 204 | argc = 1; |
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| 205 | argv = alloca((argc+1)*sizeof(char*)); |
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| 206 | argv[0] = header->path; |
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| 207 | } |
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| 208 | argv[argc] = NULL; |
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| 4349 | Serge | 209 | |
| 5190 | serge | 210 | retval = header->main(argc, argv, NULL); |
| 4349 | Serge | 211 | done: |
| 212 | exit (retval); |
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| 213 | } |
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| 214 |