diff options
Diffstat (limited to 'winsup/cygwin/lib/_cygwin_crt0_common.cc')
| -rw-r--r-- | winsup/cygwin/lib/_cygwin_crt0_common.cc | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/winsup/cygwin/lib/_cygwin_crt0_common.cc b/winsup/cygwin/lib/_cygwin_crt0_common.cc new file mode 100644 index 000000000..ca249c69b --- /dev/null +++ b/winsup/cygwin/lib/_cygwin_crt0_common.cc @@ -0,0 +1,76 @@ +/* common.cc: common crt0 function for cygwin crt0's. + + Copyright 2000 Cygnus Solutions. + +This file is part of Cygwin. + +This software is a copyrighted work licensed under the terms of the +Cygwin license. Please consult the file "CYGWIN_LICENSE" for +details. */ + +#include "winsup.h" +#include "crt0.h" +#include <reent.h> +#include <stdlib.h> + +extern __declspec(dllimport) per_process __cygwin_user_data; + +extern "C" +{ +char **environ; +void cygwin_crt0 (MainFunc); +int cygwin_attach_dll (HMODULE, MainFunc); +int cygwin_attach_noncygwin_dll (HMODULE, MainFunc); +int main (int, char **, char **); +struct _reent *_impure_ptr; +int _fmode; + +/* Set up pointers to various pieces so the dll can then use them, + and then jump to the dll. */ + +void +_cygwin_crt0_common (MainFunc f) +{ + /* This is used to record what the initial sp was. The value is needed + when copying the parent's stack to the child during a fork. */ + int onstack; + + /* The version numbers are the main source of compatibility checking. + As a backup to them, we use the size of the per_process struct. */ + __cygwin_user_data.magic_biscuit = sizeof (per_process); + + /* cygwin.dll version number in effect at the time the app was created. */ + __cygwin_user_data.dll_major = CYGWIN_VERSION_DLL_MAJOR; + __cygwin_user_data.dll_minor = CYGWIN_VERSION_DLL_MINOR; + __cygwin_user_data.api_major = CYGWIN_VERSION_API_MAJOR; + __cygwin_user_data.api_minor = CYGWIN_VERSION_API_MINOR; + + __cygwin_user_data.ctors = &__CTOR_LIST__; + __cygwin_user_data.dtors = &__DTOR_LIST__; + __cygwin_user_data.envptr = &environ; + __cygwin_user_data.impure_ptr_ptr = &_impure_ptr; + __cygwin_user_data.main = f; + __cygwin_user_data.premain[0] = cygwin_premain0; + __cygwin_user_data.premain[1] = cygwin_premain1; + __cygwin_user_data.premain[2] = cygwin_premain2; + __cygwin_user_data.premain[3] = cygwin_premain3; + __cygwin_user_data.fmode_ptr = &_fmode; + __cygwin_user_data.initial_sp = (char *) &onstack; + + /* Remember whatever the user linked his application with - or + point to entries in the dll. */ + __cygwin_user_data.malloc = &malloc; + __cygwin_user_data.free = &free; + __cygwin_user_data.realloc = &realloc; + __cygwin_user_data.calloc = &calloc; + + /* Setup the module handle so fork can get the path name. */ + __cygwin_user_data.hmodule = GetModuleHandle (0); + + /* variables for fork */ + __cygwin_user_data.data_start = &_data_start__; + __cygwin_user_data.data_end = &_data_end__; + __cygwin_user_data.bss_start = &_bss_start__; + __cygwin_user_data.bss_end = &_bss_end__; +} +} /* "C" */ |