2009-01-03 13:12:22 +08:00
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/* _cygwin_crt0_common.cc: common crt0 function for cygwin crt0's.
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2000-07-01 11:51:55 +08:00
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2009-01-03 13:12:22 +08:00
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Copyright 2000, 2001, 2002, 2003, 2004, 2009 Red Hat, Inc.
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2000-07-01 11:51:55 +08:00
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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 "crt0.h"
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winsup/ChangeLog:
* Makefile.common (COMPILE_CXX): Add support for per-file overrides
to exclude $(nostdinc) and $(nostdincxx) from compiler flags.
(COMPILE_CC): Likewise for $(nostdinc).
winsup/cygwin/ChangeLog:
* Makefile.in (DLL_OFILES): Add libstdcxx_wrapper.o
(libstdcxx_wrapper_CFLAGS): Add flags for new module.
(_cygwin_crt0_common_STDINCFLAGS): Define per-file override.
(libstdcxx_wrapper_STDINCFLAGS, cxx_STDINCFLAGS): Likewise.
* cxx.cc: Include "cygwin-cxx.h".
(operator new): Tweak prototype for full standards compliance.
(operator new[]): Likewise.
(operator new (nothrow)): New fallback function.
(operator new[] (nothrow), operator delete (nothrow),
operator delete[] (nothrow)): Likewise.
(default_cygwin_cxx_malloc): New struct of pointers to the above,
for final last-resort fallback default.
* cygwin-cxx.h: New file.
(struct per_process_cxx_malloc): Define.
(default_cygwin_cxx_malloc): Declare extern.
* cygwin.din (__wrap__ZdaPv): Export new wrapper.
(__wrap__ZdaPvRKSt9nothrow_t, __wrap__ZdlPv,
__wrap__ZdlPvRKSt9nothrow_t, __wrap__Znaj,
__wrap__ZnajRKSt9nothrow_t, __wrap__Znwj,
__wrap__ZnwjRKSt9nothrow_t): Likewise.
* globals.cc (__cygwin_user_data): Init newly-repurposed 'forkee'
field (now 'cxx_malloc') to point to default_cygwin_cxx_malloc.
* libstdcxx_wrapper.cc: New file.
(__wrap__ZdaPv, __wrap__ZdaPvRKSt9nothrow_t, __wrap__ZdlPv,
__wrap__ZdlPvRKSt9nothrow_t, __wrap__Znaj,
__wrap__ZnajRKSt9nothrow_t, __wrap__Znwj,
__wrap__ZnwjRKSt9nothrow_t): Define wrapper functions for libstdc++
malloc operators and their overrides.
* winsup.h (default_cygwin_cxx_malloc): Declare extern.
* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
* include/sys/cygwin.h (struct per_process_cxx_malloc): Forward
declare here.
(struct per_process::forkee): Rename and repurpose from this ...
(struct per_process::cxx_malloc): ... to this.
* lib/_cygwin_crt0_common.cc: Include cygwin-cxx.h.
(WEAK): Define shorthand helper macro.
(__cygwin_cxx_malloc): Define and populate with weak references
to whatever libstdc++ malloc operators will be visible at final
link time for Cygwin apps and dlls.
(_cygwin_crt0_common): Always look up cygwin DLL's internal
per_process data, and don't test for (impossible) failure. Inherit
any members of __cygwin_cxx_malloc that we don't have overrides
for from the DLL's default and store the resulting overall set of
overrides back into the DLL's global per_process data.
2009-07-08 04:12:44 +08:00
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#include "cygwin-cxx.h"
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/* Weaken these declarations so the references don't pull in C++ dependencies
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unnecessarily. */
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#define WEAK __attribute__ ((weak))
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/* Use asm names to bypass the --wrap that is being applied to redirect all other
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references to these operators toward the redirectors in the Cygwin DLL; this
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way we can record what definitions were visible at final link time but still
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send all calls to the redirectors. */
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extern WEAK void *operator new(std::size_t sz) throw (std::bad_alloc)
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__asm__ ("___real__Znwj");
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extern WEAK void *operator new[](std::size_t sz) throw (std::bad_alloc)
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__asm__ ("___real__Znaj");
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extern WEAK void operator delete(void *p) throw()
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__asm__ ("___real__ZdlPv ");
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extern WEAK void operator delete[](void *p) throw()
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__asm__ ("___real__ZdaPv");
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extern WEAK void *operator new(std::size_t sz, const std::nothrow_t &nt) throw()
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__asm__ ("___real__ZnwjRKSt9nothrow_t");
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extern WEAK void *operator new[](std::size_t sz, const std::nothrow_t &nt) throw()
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__asm__ ("___real__ZnajRKSt9nothrow_t");
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extern WEAK void operator delete(void *p, const std::nothrow_t &nt) throw()
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__asm__ ("___real__ZdlPvRKSt9nothrow_t");
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extern WEAK void operator delete[](void *p, const std::nothrow_t &nt) throw()
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__asm__ ("___real__ZdaPvRKSt9nothrow_t");
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/* Avoid an info message from linker when linking applications. */
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2004-09-28 00:30:44 +08:00
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extern __declspec(dllimport) struct _reent *_impure_ptr;
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2009-08-13 15:35:50 +08:00
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/* Initialised in _cygwin_dll_entry. */
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extern int __dynamically_loaded;
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2000-07-17 08:24:56 +08:00
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#undef environ
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2000-07-01 11:51:55 +08:00
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extern "C"
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{
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char **environ;
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int cygwin_attach_dll (HMODULE, MainFunc);
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int cygwin_attach_noncygwin_dll (HMODULE, MainFunc);
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int main (int, char **, char **);
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int _fmode;
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2002-12-10 06:49:12 +08:00
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void _pei386_runtime_relocator ();
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2000-07-01 11:51:55 +08:00
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winsup/ChangeLog:
* Makefile.common (COMPILE_CXX): Add support for per-file overrides
to exclude $(nostdinc) and $(nostdincxx) from compiler flags.
(COMPILE_CC): Likewise for $(nostdinc).
winsup/cygwin/ChangeLog:
* Makefile.in (DLL_OFILES): Add libstdcxx_wrapper.o
(libstdcxx_wrapper_CFLAGS): Add flags for new module.
(_cygwin_crt0_common_STDINCFLAGS): Define per-file override.
(libstdcxx_wrapper_STDINCFLAGS, cxx_STDINCFLAGS): Likewise.
* cxx.cc: Include "cygwin-cxx.h".
(operator new): Tweak prototype for full standards compliance.
(operator new[]): Likewise.
(operator new (nothrow)): New fallback function.
(operator new[] (nothrow), operator delete (nothrow),
operator delete[] (nothrow)): Likewise.
(default_cygwin_cxx_malloc): New struct of pointers to the above,
for final last-resort fallback default.
* cygwin-cxx.h: New file.
(struct per_process_cxx_malloc): Define.
(default_cygwin_cxx_malloc): Declare extern.
* cygwin.din (__wrap__ZdaPv): Export new wrapper.
(__wrap__ZdaPvRKSt9nothrow_t, __wrap__ZdlPv,
__wrap__ZdlPvRKSt9nothrow_t, __wrap__Znaj,
__wrap__ZnajRKSt9nothrow_t, __wrap__Znwj,
__wrap__ZnwjRKSt9nothrow_t): Likewise.
* globals.cc (__cygwin_user_data): Init newly-repurposed 'forkee'
field (now 'cxx_malloc') to point to default_cygwin_cxx_malloc.
* libstdcxx_wrapper.cc: New file.
(__wrap__ZdaPv, __wrap__ZdaPvRKSt9nothrow_t, __wrap__ZdlPv,
__wrap__ZdlPvRKSt9nothrow_t, __wrap__Znaj,
__wrap__ZnajRKSt9nothrow_t, __wrap__Znwj,
__wrap__ZnwjRKSt9nothrow_t): Define wrapper functions for libstdc++
malloc operators and their overrides.
* winsup.h (default_cygwin_cxx_malloc): Declare extern.
* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
* include/sys/cygwin.h (struct per_process_cxx_malloc): Forward
declare here.
(struct per_process::forkee): Rename and repurpose from this ...
(struct per_process::cxx_malloc): ... to this.
* lib/_cygwin_crt0_common.cc: Include cygwin-cxx.h.
(WEAK): Define shorthand helper macro.
(__cygwin_cxx_malloc): Define and populate with weak references
to whatever libstdc++ malloc operators will be visible at final
link time for Cygwin apps and dlls.
(_cygwin_crt0_common): Always look up cygwin DLL's internal
per_process data, and don't test for (impossible) failure. Inherit
any members of __cygwin_cxx_malloc that we don't have overrides
for from the DLL's default and store the resulting overall set of
overrides back into the DLL's global per_process data.
2009-07-08 04:12:44 +08:00
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struct per_process_cxx_malloc __cygwin_cxx_malloc =
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{
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&(operator new), &(operator new[]),
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&(operator delete), &(operator delete[]),
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&(operator new), &(operator new[]),
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&(operator delete), &(operator delete[])
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};
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2000-07-01 11:51:55 +08:00
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/* Set up pointers to various pieces so the dll can then use them,
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and then jump to the dll. */
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2000-07-08 12:36:27 +08:00
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int __stdcall
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_cygwin_crt0_common (MainFunc f, per_process *u)
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2000-07-01 11:51:55 +08:00
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{
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winsup/ChangeLog:
* Makefile.common (COMPILE_CXX): Add support for per-file overrides
to exclude $(nostdinc) and $(nostdincxx) from compiler flags.
(COMPILE_CC): Likewise for $(nostdinc).
winsup/cygwin/ChangeLog:
* Makefile.in (DLL_OFILES): Add libstdcxx_wrapper.o
(libstdcxx_wrapper_CFLAGS): Add flags for new module.
(_cygwin_crt0_common_STDINCFLAGS): Define per-file override.
(libstdcxx_wrapper_STDINCFLAGS, cxx_STDINCFLAGS): Likewise.
* cxx.cc: Include "cygwin-cxx.h".
(operator new): Tweak prototype for full standards compliance.
(operator new[]): Likewise.
(operator new (nothrow)): New fallback function.
(operator new[] (nothrow), operator delete (nothrow),
operator delete[] (nothrow)): Likewise.
(default_cygwin_cxx_malloc): New struct of pointers to the above,
for final last-resort fallback default.
* cygwin-cxx.h: New file.
(struct per_process_cxx_malloc): Define.
(default_cygwin_cxx_malloc): Declare extern.
* cygwin.din (__wrap__ZdaPv): Export new wrapper.
(__wrap__ZdaPvRKSt9nothrow_t, __wrap__ZdlPv,
__wrap__ZdlPvRKSt9nothrow_t, __wrap__Znaj,
__wrap__ZnajRKSt9nothrow_t, __wrap__Znwj,
__wrap__ZnwjRKSt9nothrow_t): Likewise.
* globals.cc (__cygwin_user_data): Init newly-repurposed 'forkee'
field (now 'cxx_malloc') to point to default_cygwin_cxx_malloc.
* libstdcxx_wrapper.cc: New file.
(__wrap__ZdaPv, __wrap__ZdaPvRKSt9nothrow_t, __wrap__ZdlPv,
__wrap__ZdlPvRKSt9nothrow_t, __wrap__Znaj,
__wrap__ZnajRKSt9nothrow_t, __wrap__Znwj,
__wrap__ZnwjRKSt9nothrow_t): Define wrapper functions for libstdc++
malloc operators and their overrides.
* winsup.h (default_cygwin_cxx_malloc): Declare extern.
* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
* include/sys/cygwin.h (struct per_process_cxx_malloc): Forward
declare here.
(struct per_process::forkee): Rename and repurpose from this ...
(struct per_process::cxx_malloc): ... to this.
* lib/_cygwin_crt0_common.cc: Include cygwin-cxx.h.
(WEAK): Define shorthand helper macro.
(__cygwin_cxx_malloc): Define and populate with weak references
to whatever libstdc++ malloc operators will be visible at final
link time for Cygwin apps and dlls.
(_cygwin_crt0_common): Always look up cygwin DLL's internal
per_process data, and don't test for (impossible) failure. Inherit
any members of __cygwin_cxx_malloc that we don't have overrides
for from the DLL's default and store the resulting overall set of
overrides back into the DLL's global per_process data.
2009-07-08 04:12:44 +08:00
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per_process *newu = (per_process *) cygwin_internal (CW_USER_DATA);
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2009-08-17 20:45:51 +08:00
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bool uwasnull;
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2000-07-08 12:36:27 +08:00
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2009-08-13 15:35:50 +08:00
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/* u is non-NULL if we are in a DLL, and NULL in the main exe.
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newu is the Cygwin DLL's internal per_process and never NULL. */
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2000-07-08 12:36:27 +08:00
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if (u != NULL)
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2009-08-17 20:45:51 +08:00
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uwasnull = false; /* Caller allocated space for per_process structure. */
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2000-07-08 12:36:27 +08:00
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else
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{
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2009-08-13 15:35:50 +08:00
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u = newu; /* Using DLL built-in per_process. */
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2009-08-17 20:45:51 +08:00
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uwasnull = true; /* Remember for later. */
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2000-07-08 12:36:27 +08:00
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}
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2000-07-01 11:51:55 +08:00
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/* The version numbers are the main source of compatibility checking.
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As a backup to them, we use the size of the per_process struct. */
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2000-07-08 12:36:27 +08:00
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u->magic_biscuit = sizeof (per_process);
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2000-07-01 11:51:55 +08:00
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/* cygwin.dll version number in effect at the time the app was created. */
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2000-07-08 12:36:27 +08:00
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u->dll_major = CYGWIN_VERSION_DLL_MAJOR;
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u->dll_minor = CYGWIN_VERSION_DLL_MINOR;
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u->api_major = CYGWIN_VERSION_API_MAJOR;
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u->api_minor = CYGWIN_VERSION_API_MINOR;
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u->ctors = &__CTOR_LIST__;
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u->dtors = &__DTOR_LIST__;
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2000-07-15 10:48:11 +08:00
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u->envptr = &environ;
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2004-09-28 00:30:44 +08:00
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if (uwasnull)
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_impure_ptr = u->impure_ptr; /* Use field initialized in newer DLLs. */
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else
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u->impure_ptr_ptr = &_impure_ptr; /* Older DLLs need this. */
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2000-11-13 12:06:41 +08:00
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2000-07-08 12:36:27 +08:00
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u->main = f;
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2000-07-01 11:51:55 +08:00
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2000-07-08 12:36:27 +08:00
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/* These functions are executed prior to main. They are just stubs unless the
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user overrides them. */
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u->premain[0] = cygwin_premain0;
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u->premain[1] = cygwin_premain1;
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u->premain[2] = cygwin_premain2;
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u->premain[3] = cygwin_premain3;
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u->fmode_ptr = &_fmode;
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2009-09-21 10:19:31 +08:00
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/* This is used to record what the initial sp was. The value is needed
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when copying the parent's stack to the child during a fork. */
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2000-07-08 12:36:27 +08:00
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u->initial_sp = (char *) __builtin_frame_address (1);
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2000-07-01 11:51:55 +08:00
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/* Remember whatever the user linked his application with - or
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point to entries in the dll. */
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2000-07-08 12:36:27 +08:00
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u->malloc = &malloc;
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u->free = &free;
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u->realloc = &realloc;
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u->calloc = &calloc;
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2000-07-01 11:51:55 +08:00
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2009-08-13 15:35:50 +08:00
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/* Likewise for the C++ memory operators, if any, but not if we
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were dlopen()'d, as we might get dlclose()'d and that would
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leave stale function pointers behind. */
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if (newu && newu->cxx_malloc && !__dynamically_loaded)
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winsup/ChangeLog:
* Makefile.common (COMPILE_CXX): Add support for per-file overrides
to exclude $(nostdinc) and $(nostdincxx) from compiler flags.
(COMPILE_CC): Likewise for $(nostdinc).
winsup/cygwin/ChangeLog:
* Makefile.in (DLL_OFILES): Add libstdcxx_wrapper.o
(libstdcxx_wrapper_CFLAGS): Add flags for new module.
(_cygwin_crt0_common_STDINCFLAGS): Define per-file override.
(libstdcxx_wrapper_STDINCFLAGS, cxx_STDINCFLAGS): Likewise.
* cxx.cc: Include "cygwin-cxx.h".
(operator new): Tweak prototype for full standards compliance.
(operator new[]): Likewise.
(operator new (nothrow)): New fallback function.
(operator new[] (nothrow), operator delete (nothrow),
operator delete[] (nothrow)): Likewise.
(default_cygwin_cxx_malloc): New struct of pointers to the above,
for final last-resort fallback default.
* cygwin-cxx.h: New file.
(struct per_process_cxx_malloc): Define.
(default_cygwin_cxx_malloc): Declare extern.
* cygwin.din (__wrap__ZdaPv): Export new wrapper.
(__wrap__ZdaPvRKSt9nothrow_t, __wrap__ZdlPv,
__wrap__ZdlPvRKSt9nothrow_t, __wrap__Znaj,
__wrap__ZnajRKSt9nothrow_t, __wrap__Znwj,
__wrap__ZnwjRKSt9nothrow_t): Likewise.
* globals.cc (__cygwin_user_data): Init newly-repurposed 'forkee'
field (now 'cxx_malloc') to point to default_cygwin_cxx_malloc.
* libstdcxx_wrapper.cc: New file.
(__wrap__ZdaPv, __wrap__ZdaPvRKSt9nothrow_t, __wrap__ZdlPv,
__wrap__ZdlPvRKSt9nothrow_t, __wrap__Znaj,
__wrap__ZnajRKSt9nothrow_t, __wrap__Znwj,
__wrap__ZnwjRKSt9nothrow_t): Define wrapper functions for libstdc++
malloc operators and their overrides.
* winsup.h (default_cygwin_cxx_malloc): Declare extern.
* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
* include/sys/cygwin.h (struct per_process_cxx_malloc): Forward
declare here.
(struct per_process::forkee): Rename and repurpose from this ...
(struct per_process::cxx_malloc): ... to this.
* lib/_cygwin_crt0_common.cc: Include cygwin-cxx.h.
(WEAK): Define shorthand helper macro.
(__cygwin_cxx_malloc): Define and populate with weak references
to whatever libstdc++ malloc operators will be visible at final
link time for Cygwin apps and dlls.
(_cygwin_crt0_common): Always look up cygwin DLL's internal
per_process data, and don't test for (impossible) failure. Inherit
any members of __cygwin_cxx_malloc that we don't have overrides
for from the DLL's default and store the resulting overall set of
overrides back into the DLL's global per_process data.
2009-07-08 04:12:44 +08:00
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{
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/* Inherit what we don't override. */
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#define CONDITIONALLY_OVERRIDE(MEMBER) \
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if (!__cygwin_cxx_malloc.MEMBER) \
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__cygwin_cxx_malloc.MEMBER = newu->cxx_malloc->MEMBER;
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CONDITIONALLY_OVERRIDE(oper_new);
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CONDITIONALLY_OVERRIDE(oper_new__);
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CONDITIONALLY_OVERRIDE(oper_delete);
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CONDITIONALLY_OVERRIDE(oper_delete__);
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CONDITIONALLY_OVERRIDE(oper_new_nt);
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CONDITIONALLY_OVERRIDE(oper_new___nt);
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CONDITIONALLY_OVERRIDE(oper_delete_nt);
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CONDITIONALLY_OVERRIDE(oper_delete___nt);
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2009-08-13 15:35:50 +08:00
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/* Now update the resulting set into the global redirectors. */
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*newu->cxx_malloc = __cygwin_cxx_malloc;
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winsup/ChangeLog:
* Makefile.common (COMPILE_CXX): Add support for per-file overrides
to exclude $(nostdinc) and $(nostdincxx) from compiler flags.
(COMPILE_CC): Likewise for $(nostdinc).
winsup/cygwin/ChangeLog:
* Makefile.in (DLL_OFILES): Add libstdcxx_wrapper.o
(libstdcxx_wrapper_CFLAGS): Add flags for new module.
(_cygwin_crt0_common_STDINCFLAGS): Define per-file override.
(libstdcxx_wrapper_STDINCFLAGS, cxx_STDINCFLAGS): Likewise.
* cxx.cc: Include "cygwin-cxx.h".
(operator new): Tweak prototype for full standards compliance.
(operator new[]): Likewise.
(operator new (nothrow)): New fallback function.
(operator new[] (nothrow), operator delete (nothrow),
operator delete[] (nothrow)): Likewise.
(default_cygwin_cxx_malloc): New struct of pointers to the above,
for final last-resort fallback default.
* cygwin-cxx.h: New file.
(struct per_process_cxx_malloc): Define.
(default_cygwin_cxx_malloc): Declare extern.
* cygwin.din (__wrap__ZdaPv): Export new wrapper.
(__wrap__ZdaPvRKSt9nothrow_t, __wrap__ZdlPv,
__wrap__ZdlPvRKSt9nothrow_t, __wrap__Znaj,
__wrap__ZnajRKSt9nothrow_t, __wrap__Znwj,
__wrap__ZnwjRKSt9nothrow_t): Likewise.
* globals.cc (__cygwin_user_data): Init newly-repurposed 'forkee'
field (now 'cxx_malloc') to point to default_cygwin_cxx_malloc.
* libstdcxx_wrapper.cc: New file.
(__wrap__ZdaPv, __wrap__ZdaPvRKSt9nothrow_t, __wrap__ZdlPv,
__wrap__ZdlPvRKSt9nothrow_t, __wrap__Znaj,
__wrap__ZnajRKSt9nothrow_t, __wrap__Znwj,
__wrap__ZnwjRKSt9nothrow_t): Define wrapper functions for libstdc++
malloc operators and their overrides.
* winsup.h (default_cygwin_cxx_malloc): Declare extern.
* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
* include/sys/cygwin.h (struct per_process_cxx_malloc): Forward
declare here.
(struct per_process::forkee): Rename and repurpose from this ...
(struct per_process::cxx_malloc): ... to this.
* lib/_cygwin_crt0_common.cc: Include cygwin-cxx.h.
(WEAK): Define shorthand helper macro.
(__cygwin_cxx_malloc): Define and populate with weak references
to whatever libstdc++ malloc operators will be visible at final
link time for Cygwin apps and dlls.
(_cygwin_crt0_common): Always look up cygwin DLL's internal
per_process data, and don't test for (impossible) failure. Inherit
any members of __cygwin_cxx_malloc that we don't have overrides
for from the DLL's default and store the resulting overall set of
overrides back into the DLL's global per_process data.
2009-07-08 04:12:44 +08:00
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}
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/* Setup the module handle so fork can get the path name. */
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2000-07-08 12:36:27 +08:00
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u->hmodule = GetModuleHandle (0);
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2000-07-01 11:51:55 +08:00
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/* variables for fork */
|
2000-07-08 12:36:27 +08:00
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u->data_start = &_data_start__;
|
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u->data_end = &_data_end__;
|
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u->bss_start = &_bss_start__;
|
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|
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u->bss_end = &_bss_end__;
|
2002-12-10 06:49:12 +08:00
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|
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_pei386_runtime_relocator ();
|
2000-07-08 12:36:27 +08:00
|
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return 1;
|
2000-07-01 11:51:55 +08:00
|
|
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}
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} /* "C" */
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