/* dll_init.h
- Copyright 1998 Cygnus Solutions
+ Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2007, 2008,
+ 2009 Red Hat, Inc.
This file is part of Cygwin.
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
-//-----------------------------------------------------------------------------
-// list of loaded DLL (used by fork & init)
-class DllList
+struct per_module
{
-public:
- static DllList& the ();
-
- // return dll index used for freeDll
- int recordDll (HMODULE, per_process*);
- void detachDll (int dll_index);
-
- // called after initialization of main module in dll_crt0
- void initAll ();
-
- // global destructors of loaded dlls
- void doGlobalDestructorsOfDlls ();
-
- // number of dlls dlopened
- int numberOfOpenedDlls ();
-
- // boolean to determine if forked process must reload dlls opened with
- // LoadLibrary or dlopen ...
- // default = 0 (FALSE)
- int forkeeMustReloadDlls ();
- void forkeeMustReloadDlls (int);
-
- void forkeeLoadDlls ();
-
- // set name of current library opened with dlopen
- void currentDlOpenedLib (const char*);
+ char ***envptr;
+ void (**ctors)(void);
+ void (**dtors)(void);
+ void *data_start;
+ void *data_end;
+ void *bss_start;
+ void *bss_end;
+ int (*main)(int, char **, char **);
+ per_module &operator = (per_process *p)
+ {
+ envptr = p->envptr;
+ ctors = p->ctors;
+ dtors = p->dtors;
+ data_start = p->data_start;
+ data_end = p->data_end;
+ bss_start = p->bss_start;
+ bss_end = p->bss_end;
+ main = p->main;
+ return *this;
+ }
+ void run_ctors ();
+ void run_dtors ();
};
-//-----------------------------------------------------------------------------
-//-----------------------------------------------------------------------------
-class DllListIterator
+typedef enum
{
- int _type;
- int _index;
-
-protected:
- DllListIterator (int type);
- int index () const { return _index; }
+ DLL_NONE,
+ DLL_LINK,
+ DLL_LOAD,
+ DLL_ANY
+} dll_type;
-public:
- virtual ~DllListIterator();
-
- int ok() { return _index!=-1; }
- void operator++ ();
- void operator++ (int) { operator++ (); }
- operator per_process* ();
+struct dll
+{
+ struct dll *next, *prev;
+ per_module p;
+ HMODULE handle;
+ int count;
+ bool has_dtors;
+ dll_type type;
+ long ndeps;
+ dll** deps;
+ PWCHAR modname;
+ DWORD image_size;
+ void* preferred_base;
+ WCHAR name[1];
+ void detach ();
+ int init ();
+ void run_dtors ()
+ {
+ if (has_dtors)
+ {
+ has_dtors = 0;
+ p.run_dtors ();
+ }
+ }
};
-//-----------------------------------------------------------------------------
+#define MAX_DLL_BEFORE_INIT 100
-class LinkedDllIterator : public DllListIterator
+class dll_list
{
+ dll *end;
+ dll *hold;
+ dll_type hold_type;
+ static muto protect;
public:
- LinkedDllIterator ();
- ~LinkedDllIterator ();
+ dll start;
+ int loaded_dlls;
+ int reload_on_fork;
+ dll *operator [] (const PWCHAR name);
+ dll *alloc (HINSTANCE, per_process *, dll_type);
+ dll *find (void *);
+ void detach (void *);
+ void init ();
+ void load_after_fork (HANDLE);
+ void reserve_space ();
+ void load_after_fork_impl (HANDLE, dll* which, int retries);
+ dll *find_by_modname (const PWCHAR name);
+ void populate_deps (dll* d);
+ void topsort ();
+ void topsort_visit (dll* d, bool goto_tail);
+ void append (dll* d);
+
+ dll *inext ()
+ {
+ while ((hold = hold->next))
+ if (hold_type == DLL_ANY || hold->type == hold_type)
+ break;
+ return hold;
+ }
+
+ dll *istart (dll_type t)
+ {
+ hold_type = t;
+ hold = &start;
+ return inext ();
+ }
+ void guard(bool lockit)
+ {
+ if (lockit)
+ protect.acquire ();
+ else
+ protect.release ();
+ }
+ friend void dll_global_dtors ();
+ dll_list () { protect.init ("dll_list"); }
};
-//-----------------------------------------------------------------------------
-
-class LoadedDllIterator : public DllListIterator
+/* References:
+ http://msdn.microsoft.com/en-us/windows/hardware/gg463125
+ http://msdn.microsoft.com/en-us/library/ms809762.aspx
+*/
+struct pefile
{
-public:
- LoadedDllIterator ();
- ~LoadedDllIterator ();
+ IMAGE_DOS_HEADER dos_hdr;
+
+ char* rva (long offset) { return (char*) this + offset; }
+ PIMAGE_NT_HEADERS32 pe_hdr () { return (PIMAGE_NT_HEADERS32) rva (dos_hdr.e_lfanew); }
+ PIMAGE_OPTIONAL_HEADER32 optional_hdr () { return &pe_hdr ()->OptionalHeader; }
+ PIMAGE_DATA_DIRECTORY idata_dir (DWORD which)
+ {
+ PIMAGE_OPTIONAL_HEADER32 oh = optional_hdr ();
+ return (which < oh->NumberOfRvaAndSizes)? oh->DataDirectory + which : 0;
+ }
};
-//-----------------------------------------------------------------------------
-
-#define DO_LINKED_DLL(var) \
-{ \
-LinkedDllIterator iterator; \
-while (iterator.ok ()) \
-{ \
- per_process *var = (per_process *) iterator;
-
-#define DO_LOADED_DLL(var) \
-{ \
-LoadedDllIterator iterator; \
-while (iterator.ok ()) \
-{ \
- per_process *var = (per_process *) iterator;
-
-#define DLL_DONE \
- iterator++; \
-} \
-}
+extern dll_list dlls;
+void dll_global_dtors ();
+/* These probably belong in a newlib header but we can keep them here
+ for now. */
+extern "C" int __cxa_atexit(void (*)(void*), void*, void*);
+extern "C" int __cxa_finalize(void*);
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