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/* init.cc
Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Red Hat, Inc.
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 <stdlib.h>
#include "thread.h"
#include "perprocess.h"
#include "cygthread.h"
#include "cygtls.h"
int NO_COPY dynamically_loaded;
static void WINAPI
threadfunc_fe (VOID *arg)
{
_threadinfo::call ((DWORD (*) (void *, void *)) (((char **) _tlsbase)[-1]), arg);
}
static void
munge_threadfunc (HANDLE cygwin_hmodule)
{
char **ebp = (char **) __builtin_frame_address (0);
static unsigned threadfunc_ix;
if (!threadfunc_ix)
{
for (char **peb = ebp; peb < (char **) _tlsbase; peb++)
if (*peb == (char *) cygthread::stub)
{
threadfunc_ix = peb - ebp;
goto foundit;
}
return;
}
foundit:
char *threadfunc = ebp[threadfunc_ix];
ebp[threadfunc_ix] = (char *) threadfunc_fe;
((char **) _tlsbase)[-1] = threadfunc;
}
extern "C" int WINAPI
dll_entry (HANDLE h, DWORD reason, void *static_load)
{
switch (reason)
{
case DLL_PROCESS_ATTACH:
dynamically_loaded = (static_load == NULL);
__cygwin_user_data.impure_ptr = &_my_tls.local_clib;
_my_tls.stackptr = _my_tls.stack;
break;
case DLL_PROCESS_DETACH:
break;
case DLL_THREAD_ATTACH:
munge_threadfunc (h);
break;
}
return 1;
}
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