195 lines
6.5 KiB
C++
195 lines
6.5 KiB
C++
/* _cygwin_crt0_common.cc: common crt0 function for cygwin crt0's.
|
|
|
|
Copyright 2000, 2001, 2002, 2003, 2004, 2009, 2010, 2011, 2012, 2013
|
|
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 "crt0.h"
|
|
#include "cygwin-cxx.h"
|
|
|
|
/* Weaken these declarations so the references don't pull in C++ dependencies
|
|
unnecessarily. */
|
|
#define WEAK __attribute__ ((weak))
|
|
|
|
#ifdef __x86_64__
|
|
#define REAL_ZNWX "__real__Znwm"
|
|
#define REAL_ZNAX "__real__Znam"
|
|
#define REAL_ZNWX_NOTHROW_T "__real__ZnwmRKSt9nothrow_t"
|
|
#define REAL_ZNAX_NOTHROW_T "__real__ZnamRKSt9nothrow_t"
|
|
#else
|
|
#define REAL_ZNWX "___real__Znwj"
|
|
#define REAL_ZNAX "___real__Znaj"
|
|
#define REAL_ZNWX_NOTHROW_T "___real__ZnwjRKSt9nothrow_t"
|
|
#define REAL_ZNAX_NOTHROW_T "___real__ZnajRKSt9nothrow_t"
|
|
#endif
|
|
#define REAL_ZDLPV _SYMSTR (__real__ZdlPv)
|
|
#define REAL_ZDAPV _SYMSTR (__real__ZdaPv)
|
|
#define REAL_ZDLPV_NOTHROW_T _SYMSTR (__real__ZdlPvRKSt9nothrow_t)
|
|
#define REAL_ZDAPV_NOTHROW_T _SYMSTR (__real__ZdaPvRKSt9nothrow_t)
|
|
|
|
/* Use asm names to bypass the --wrap that is being applied to redirect all other
|
|
references to these operators toward the redirectors in the Cygwin DLL; this
|
|
way we can record what definitions were visible at final link time but still
|
|
send all calls to the redirectors. */
|
|
extern WEAK void *operator new(std::size_t sz) throw (std::bad_alloc)
|
|
__asm__ (REAL_ZNWX);
|
|
extern WEAK void *operator new[](std::size_t sz) throw (std::bad_alloc)
|
|
__asm__ (REAL_ZNAX);
|
|
extern WEAK void operator delete(void *p) throw()
|
|
__asm__ (REAL_ZDLPV);
|
|
extern WEAK void operator delete[](void *p) throw()
|
|
__asm__ (REAL_ZDAPV);
|
|
extern WEAK void *operator new(std::size_t sz, const std::nothrow_t &nt) throw()
|
|
__asm__ (REAL_ZNWX_NOTHROW_T);
|
|
extern WEAK void *operator new[](std::size_t sz, const std::nothrow_t &nt) throw()
|
|
__asm__ (REAL_ZNAX_NOTHROW_T);
|
|
extern WEAK void operator delete(void *p, const std::nothrow_t &nt) throw()
|
|
__asm__ (REAL_ZDLPV_NOTHROW_T);
|
|
extern WEAK void operator delete[](void *p, const std::nothrow_t &nt) throw()
|
|
__asm__ (REAL_ZDAPV_NOTHROW_T);
|
|
|
|
/* Avoid an info message from linker when linking applications. */
|
|
extern __declspec(dllimport) struct _reent *_impure_ptr;
|
|
|
|
/* Initialised in _cygwin_dll_entry. */
|
|
extern int __dynamically_loaded;
|
|
|
|
#undef environ
|
|
|
|
extern "C"
|
|
{
|
|
#ifndef __x86_64__
|
|
char **environ;
|
|
#endif
|
|
int _fmode;
|
|
|
|
extern char __RUNTIME_PSEUDO_RELOC_LIST__;
|
|
extern char __RUNTIME_PSEUDO_RELOC_LIST_END__;
|
|
#ifdef __x86_64__
|
|
extern char __image_base__;
|
|
#define _image_base__ __image_base__
|
|
#else
|
|
extern char _image_base__;
|
|
#endif
|
|
|
|
struct per_process_cxx_malloc __cygwin_cxx_malloc =
|
|
{
|
|
&(operator new), &(operator new[]),
|
|
&(operator delete), &(operator delete[]),
|
|
&(operator new), &(operator new[]),
|
|
&(operator delete), &(operator delete[])
|
|
};
|
|
|
|
/* Set up pointers to various pieces so the dll can then use them,
|
|
and then jump to the dll. */
|
|
|
|
int __stdcall
|
|
_cygwin_crt0_common (MainFunc f, per_process *u)
|
|
{
|
|
per_process *newu = (per_process *) cygwin_internal (CW_USER_DATA);
|
|
bool uwasnull;
|
|
|
|
/* u is non-NULL if we are in a DLL, and NULL in the main exe.
|
|
newu is the Cygwin DLL's internal per_process and never NULL. */
|
|
if (u != NULL)
|
|
uwasnull = false; /* Caller allocated space for per_process structure. */
|
|
else
|
|
{
|
|
u = newu; /* Using DLL built-in per_process. */
|
|
uwasnull = true; /* Remember for later. */
|
|
}
|
|
|
|
/* The version numbers are the main source of compatibility checking.
|
|
As a backup to them, we use the size of the per_process struct. */
|
|
u->magic_biscuit = sizeof (per_process);
|
|
|
|
/* cygwin.dll version number in effect at the time the app was created. */
|
|
u->dll_major = CYGWIN_VERSION_DLL_MAJOR;
|
|
u->dll_minor = CYGWIN_VERSION_DLL_MINOR;
|
|
u->api_major = CYGWIN_VERSION_API_MAJOR;
|
|
u->api_minor = CYGWIN_VERSION_API_MINOR;
|
|
|
|
u->ctors = &__CTOR_LIST__;
|
|
u->dtors = &__DTOR_LIST__;
|
|
#ifndef __x86_64__
|
|
u->envptr = &environ;
|
|
#endif
|
|
if (uwasnull)
|
|
_impure_ptr = u->impure_ptr; /* Use field initialized in newer DLLs. */
|
|
else
|
|
u->impure_ptr_ptr = &_impure_ptr; /* Older DLLs need this. */
|
|
|
|
u->main = f;
|
|
|
|
/* These functions are executed prior to main. They are just stubs unless the
|
|
user overrides them. */
|
|
u->premain[0] = cygwin_premain0;
|
|
u->premain[1] = cygwin_premain1;
|
|
u->premain[2] = cygwin_premain2;
|
|
u->premain[3] = cygwin_premain3;
|
|
u->fmode_ptr = &_fmode;
|
|
|
|
/* This is used to record what the initial sp was. The value is needed
|
|
when copying the parent's stack to the child during a fork. */
|
|
u->initial_sp = (char *) __builtin_frame_address (1);
|
|
|
|
/* Remember whatever the user linked his application with - or
|
|
point to entries in the dll. */
|
|
u->malloc = &malloc;
|
|
u->free = &free;
|
|
u->realloc = &realloc;
|
|
u->calloc = &calloc;
|
|
u->posix_memalign = &posix_memalign;
|
|
|
|
/* Likewise for the C++ memory operators, if any, but not if we
|
|
were dlopen()'d, as we might get dlclose()'d and that would
|
|
leave stale function pointers behind. */
|
|
if (newu && newu->cxx_malloc && !__dynamically_loaded)
|
|
{
|
|
/* Inherit what we don't override. */
|
|
#define CONDITIONALLY_OVERRIDE(MEMBER) \
|
|
if (!__cygwin_cxx_malloc.MEMBER) \
|
|
__cygwin_cxx_malloc.MEMBER = newu->cxx_malloc->MEMBER;
|
|
CONDITIONALLY_OVERRIDE(oper_new);
|
|
CONDITIONALLY_OVERRIDE(oper_new__);
|
|
CONDITIONALLY_OVERRIDE(oper_delete);
|
|
CONDITIONALLY_OVERRIDE(oper_delete__);
|
|
CONDITIONALLY_OVERRIDE(oper_new_nt);
|
|
CONDITIONALLY_OVERRIDE(oper_new___nt);
|
|
CONDITIONALLY_OVERRIDE(oper_delete_nt);
|
|
CONDITIONALLY_OVERRIDE(oper_delete___nt);
|
|
/* Now update the resulting set into the global redirectors. */
|
|
*newu->cxx_malloc = __cygwin_cxx_malloc;
|
|
}
|
|
|
|
/* Setup the module handle so fork can get the path name. */
|
|
u->hmodule = GetModuleHandle (0);
|
|
|
|
/* variables for fork */
|
|
#ifdef __x86_64__
|
|
u->data_start = &__data_start__;
|
|
u->data_end = &__data_end__;
|
|
u->bss_start = &__bss_start__;
|
|
u->bss_end = &__bss_end__;
|
|
#else
|
|
u->data_start = &_data_start__;
|
|
u->data_end = &_data_end__;
|
|
u->bss_start = &_bss_start__;
|
|
u->bss_end = &_bss_end__;
|
|
#endif
|
|
u->pseudo_reloc_start = &__RUNTIME_PSEUDO_RELOC_LIST__;
|
|
u->pseudo_reloc_end = &__RUNTIME_PSEUDO_RELOC_LIST_END__;
|
|
u->image_base = &_image_base__;
|
|
/* This is actually a dummy call to force the linker to load this
|
|
symbol for older apps which need it. */
|
|
_pei386_runtime_relocator (NULL);
|
|
return 1;
|
|
}
|
|
} /* "C" */
|