149 lines
3.1 KiB
C++
149 lines
3.1 KiB
C++
/* dll_init.h
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Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2007, 2008, 2009, 2010,
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2011, 2012 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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struct per_module
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{
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char ***envptr;
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void (**ctors)(void);
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void (**dtors)(void);
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void *data_start;
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void *data_end;
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void *bss_start;
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void *bss_end;
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int (*main)(int, char **, char **);
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per_module &operator = (per_process *p)
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{
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envptr = p->envptr;
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ctors = p->ctors;
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dtors = p->dtors;
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data_start = p->data_start;
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data_end = p->data_end;
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bss_start = p->bss_start;
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bss_end = p->bss_end;
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main = p->main;
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return *this;
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}
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void run_ctors ();
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void run_dtors ();
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};
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typedef enum
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{
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DLL_NONE,
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DLL_LINK,
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DLL_LOAD,
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DLL_ANY
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} dll_type;
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struct dll
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{
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struct dll *next, *prev;
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per_module p;
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HMODULE handle;
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int count;
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bool has_dtors;
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dll_type type;
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long ndeps;
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dll** deps;
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DWORD image_size;
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void* preferred_base;
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PWCHAR modname;
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WCHAR name[1];
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void detach ();
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int init ();
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void run_dtors ()
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{
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if (has_dtors)
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{
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has_dtors = 0;
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p.run_dtors ();
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}
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}
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};
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#define MAX_DLL_BEFORE_INIT 100
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class dll_list
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{
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dll *end;
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dll *hold;
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dll_type hold_type;
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static muto protect;
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public:
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dll start;
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int loaded_dlls;
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int reload_on_fork;
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dll *operator [] (const PWCHAR name);
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dll *alloc (HINSTANCE, per_process *, dll_type);
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dll *find (void *);
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void detach (void *);
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void init ();
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void load_after_fork (HANDLE);
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void reserve_space ();
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void load_after_fork_impl (HANDLE, dll* which, int retries);
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dll *find_by_modname (const PWCHAR name);
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void populate_deps (dll* d);
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void topsort ();
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void topsort_visit (dll* d, bool goto_tail);
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void append (dll* d);
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dll *inext ()
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{
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while ((hold = hold->next))
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if (hold_type == DLL_ANY || hold->type == hold_type)
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break;
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return hold;
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}
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dll *istart (dll_type t)
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{
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hold_type = t;
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hold = &start;
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return inext ();
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}
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void guard(bool lockit)
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{
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if (lockit)
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protect.acquire ();
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else
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protect.release ();
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}
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friend void dll_global_dtors ();
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dll_list () { protect.init ("dll_list"); }
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};
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/* References:
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http://msdn.microsoft.com/en-us/windows/hardware/gg463125
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http://msdn.microsoft.com/en-us/library/ms809762.aspx
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*/
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struct pefile
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{
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IMAGE_DOS_HEADER dos_hdr;
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char* rva (long offset) { return (char*) this + offset; }
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PIMAGE_NT_HEADERS32 pe_hdr () { return (PIMAGE_NT_HEADERS32) rva (dos_hdr.e_lfanew); }
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PIMAGE_OPTIONAL_HEADER32 optional_hdr () { return &pe_hdr ()->OptionalHeader; }
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PIMAGE_DATA_DIRECTORY idata_dir (DWORD which)
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{
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PIMAGE_OPTIONAL_HEADER32 oh = optional_hdr ();
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return (which < oh->NumberOfRvaAndSizes)? oh->DataDirectory + which : 0;
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}
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};
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extern dll_list dlls;
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void dll_global_dtors ();
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/* These probably belong in a newlib header but we can keep them here
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for now. */
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extern "C" int __cxa_atexit(void (*)(void*), void*, void*);
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extern "C" int __cxa_finalize(void*);
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