68 lines
1.5 KiB
C++
68 lines
1.5 KiB
C++
/* init.cc
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include <stdlib.h>
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#include "thread.h"
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#include "perprocess.h"
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#include "cygthread.h"
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#include "cygtls.h"
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int NO_COPY dynamically_loaded;
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static void WINAPI
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threadfunc_fe (VOID *arg)
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{
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_threadinfo::call ((DWORD (*) (void *, void *)) (((char **) _tlsbase)[-1]), arg);
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}
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static void
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munge_threadfunc (HANDLE cygwin_hmodule)
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{
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char **ebp = (char **) __builtin_frame_address (0);
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static unsigned threadfunc_ix;
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if (!threadfunc_ix)
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{
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for (char **peb = ebp; peb < (char **) _tlsbase; peb++)
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if (*peb == (char *) cygthread::stub)
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{
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threadfunc_ix = peb - ebp;
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goto foundit;
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}
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return;
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}
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foundit:
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char *threadfunc = ebp[threadfunc_ix];
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ebp[threadfunc_ix] = (char *) threadfunc_fe;
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((char **) _tlsbase)[-1] = threadfunc;
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}
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extern "C" int WINAPI
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dll_entry (HANDLE h, DWORD reason, void *static_load)
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{
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switch (reason)
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{
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case DLL_PROCESS_ATTACH:
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dynamically_loaded = (static_load == NULL);
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// __cygwin_user_data.impure_ptr = &_my_tls.local_clib;
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_my_tls.stackptr = _my_tls.stack;
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break;
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case DLL_PROCESS_DETACH:
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break;
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case DLL_THREAD_ATTACH:
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munge_threadfunc (h);
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break;
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case DLL_THREAD_DETACH:
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break;
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}
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return 1;
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}
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