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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 | |||
22 | #include "cpu_features.h" |
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23 | |||
24 | |||
25 | /* NOTE: The code for initializing the _argv, _argc, and environ variables |
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26 | * has been moved to a separate .c file which is included in both |
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27 | * crt1.c and dllcrt1.c. This means changes in the code don't have to |
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28 | * be manually synchronized, but it does lead to this not-generally- |
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29 | * a-good-idea use of include. */ |
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30 | |||
31 | |||
32 | extern char __cmdline[]; |
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33 | extern char __pgmname[]; |
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34 | |||
35 | extern int main (int, char **, char **); |
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36 | |||
37 | int _errno; |
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38 | int _fmode; |
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39 | |||
40 | int _argc; |
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41 | char **_argv; |
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42 | |||
43 | static char *arg[2]; |
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44 | |||
45 | void _exit(int __status) __attribute__((noreturn)); |
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46 | |||
47 | |||
48 | char * __libc_getenv(const char *name) |
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49 | { |
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50 | return NULL; |
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51 | } |
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52 | |||
53 | void __main (){}; |
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54 | |||
55 | struct app_hdr |
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56 | { |
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57 | char banner[8]; |
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58 | int version; |
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59 | int start; |
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60 | int iend; |
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61 | int memsize; |
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62 | int stacktop; |
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63 | char *cmdline; |
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64 | char *path; |
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65 | }; |
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66 | |||
67 | typedef void (*ctp)(); |
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68 | static void __do_global_ctors () |
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69 | { |
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70 | extern int __CTOR_LIST__; |
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71 | int *c = &__CTOR_LIST__; |
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72 | c++; |
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73 | while (*c) |
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74 | { |
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75 | ctp d = (ctp)*c; |
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76 | (d)(); |
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77 | c++; |
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78 | } |
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79 | } |
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80 | |||
81 | void __attribute__((noreturn)) |
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82 | __crt_startup (void) |
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83 | { |
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84 | int nRet; |
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85 | struct app_hdr *header; |
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86 | |||
87 | |||
88 | init_global_reent(); |
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89 | |||
90 | /* |
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91 | * Initialize floating point unit. |
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92 | */ |
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93 | __cpu_features_init (); /* Do we have SSE, etc.*/ |
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94 | // _fpreset (); /* Supplied by the runtime library. */ |
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95 | |||
96 | __do_global_ctors(); |
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97 | |||
98 | arg[0] = &__pgmname[0]; |
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99 | |||
100 | if( __cmdline[0] != 0) |
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101 | { |
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102 | _argc = 2; |
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103 | arg[1] = &__cmdline[0]; |
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104 | } else _argc = 1; |
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105 | |||
106 | _argv = arg; |
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107 | |||
108 | /* |
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109 | * Sets the default file mode. |
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110 | * If _CRT_fmode is set, also set mode for stdin, stdout |
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111 | * and stderr, as well |
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112 | * NOTE: DLLs don't do this because that would be rude! |
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113 | */ |
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114 | // _mingw32_init_fmode (); |
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115 | |||
116 | |||
117 | nRet = main (_argc, _argv, NULL); |
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118 | |||
119 | /* |
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120 | * Perform exit processing for the C library. This means |
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121 | * flushing output and calling 'atexit' registered functions. |
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122 | */ |
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123 | exit (nRet); |
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124 | } |
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125 |