diff options
Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/crtstuff.c')
| -rw-r--r-- | gcc-4.2.1-5666.3/gcc/crtstuff.c | 586 |
1 files changed, 0 insertions, 586 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/crtstuff.c b/gcc-4.2.1-5666.3/gcc/crtstuff.c deleted file mode 100644 index 8fdc021d0..000000000 --- a/gcc-4.2.1-5666.3/gcc/crtstuff.c +++ /dev/null @@ -1,586 +0,0 @@ -/* Specialized bits of code needed to support construction and - destruction of file-scope objects in C++ code. - Copyright (C) 1991, 1994, 1995, 1996, 1997, 1998, - 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. - Contributed by Ron Guilmette (rfg@monkeys.com). - -This file is part of GCC. - -GCC is free software; you can redistribute it and/or modify it under -the terms of the GNU General Public License as published by the Free -Software Foundation; either version 2, or (at your option) any later -version. - -In addition to the permissions in the GNU General Public License, the -Free Software Foundation gives you unlimited permission to link the -compiled version of this file into combinations with other programs, -and to distribute those combinations without any restriction coming -from the use of this file. (The General Public License restrictions -do apply in other respects; for example, they cover modification of -the file, and distribution when not linked into a combine -executable.) - -GCC is distributed in the hope that it will be useful, but WITHOUT ANY -WARRANTY; without even the implied warranty of MERCHANTABILITY or -FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -for more details. - -You should have received a copy of the GNU General Public License -along with GCC; see the file COPYING. If not, write to the Free -Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301, USA. */ - -/* This file is a bit like libgcc2.c in that it is compiled - multiple times and yields multiple .o files. - - This file is useful on target machines where the object file format - supports multiple "user-defined" sections (e.g. COFF, ELF, ROSE). On - such systems, this file allows us to avoid running collect (or any - other such slow and painful kludge). Additionally, if the target - system supports a .init section, this file allows us to support the - linking of C++ code with a non-C++ main program. - - Note that if INIT_SECTION_ASM_OP is defined in the tm.h file, then - this file *will* make use of the .init section. If that symbol is - not defined however, then the .init section will not be used. - - Currently, only ELF and COFF are supported. It is likely however that - ROSE could also be supported, if someone was willing to do the work to - make whatever (small?) adaptations are needed. (Some work may be - needed on the ROSE assembler and linker also.) - - This file must be compiled with gcc. */ - -/* Target machine header files require this define. */ -#define IN_LIBGCC2 - -/* FIXME: Including auto-host is incorrect, but until we have - identified the set of defines that need to go into auto-target.h, - this will have to do. */ -#include "auto-host.h" -#undef gid_t -#undef pid_t -#undef rlim_t -#undef ssize_t -#undef uid_t -#undef vfork -#include "tconfig.h" -#include "tsystem.h" -#include "coretypes.h" -#include "tm.h" -#include "unwind-dw2-fde.h" - -#ifndef FORCE_CODE_SECTION_ALIGN -# define FORCE_CODE_SECTION_ALIGN -#endif - -#ifndef CRT_CALL_STATIC_FUNCTION -# define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \ -static void __attribute__((__used__)) \ -call_ ## FUNC (void) \ -{ \ - asm (SECTION_OP); \ - FUNC (); \ - FORCE_CODE_SECTION_ALIGN \ - asm (TEXT_SECTION_ASM_OP); \ -} -#endif - -#if defined(OBJECT_FORMAT_ELF) && defined(HAVE_LD_EH_FRAME_HDR) \ - && !defined(inhibit_libc) && !defined(CRTSTUFFT_O) \ - && defined(__GLIBC__) && __GLIBC__ >= 2 -#include <link.h> -# if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) \ - || (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && defined(DT_CONFIG))) -# define USE_PT_GNU_EH_FRAME -# endif -#endif -#if defined(EH_FRAME_SECTION_NAME) && !defined(USE_PT_GNU_EH_FRAME) -# define USE_EH_FRAME_REGISTRY -#endif -#if defined(EH_FRAME_SECTION_NAME) && EH_TABLES_CAN_BE_READ_ONLY -# define EH_FRAME_SECTION_CONST const -#else -# define EH_FRAME_SECTION_CONST -#endif - -/* We do not want to add the weak attribute to the declarations of these - routines in unwind-dw2-fde.h because that will cause the definition of - these symbols to be weak as well. - - This exposes a core issue, how to handle creating weak references vs - how to create weak definitions. Either we have to have the definition - of TARGET_WEAK_ATTRIBUTE be conditional in the shared header files or - have a second declaration if we want a function's references to be weak, - but not its definition. - - Making TARGET_WEAK_ATTRIBUTE conditional seems like a good solution until - one thinks about scaling to larger problems -- i.e., the condition under - which TARGET_WEAK_ATTRIBUTE is active will eventually get far too - complicated. - - So, we take an approach similar to #pragma weak -- we have a second - declaration for functions that we want to have weak references. - - Neither way is particularly good. */ - -/* References to __register_frame_info and __deregister_frame_info should - be weak in this file if at all possible. */ -extern void __register_frame_info (const void *, struct object *) - TARGET_ATTRIBUTE_WEAK; -extern void __register_frame_info_bases (const void *, struct object *, - void *, void *) - TARGET_ATTRIBUTE_WEAK; -extern void *__deregister_frame_info (const void *) - TARGET_ATTRIBUTE_WEAK; -extern void *__deregister_frame_info_bases (const void *) - TARGET_ATTRIBUTE_WEAK; -extern void __do_global_ctors_1 (void); - -/* Likewise for _Jv_RegisterClasses. */ -extern void _Jv_RegisterClasses (void *) TARGET_ATTRIBUTE_WEAK; - -#ifdef OBJECT_FORMAT_ELF - -/* Declare a pointer to void function type. */ -typedef void (*func_ptr) (void); -#define STATIC static - -#else /* OBJECT_FORMAT_ELF */ - -#include "gbl-ctors.h" - -#define STATIC - -#endif /* OBJECT_FORMAT_ELF */ - -#ifdef CRT_BEGIN - -/* NOTE: In order to be able to support SVR4 shared libraries, we arrange - to have one set of symbols { __CTOR_LIST__, __DTOR_LIST__, __CTOR_END__, - __DTOR_END__ } per root executable and also one set of these symbols - per shared library. So in any given whole process image, we may have - multiple definitions of each of these symbols. In order to prevent - these definitions from conflicting with one another, and in order to - ensure that the proper lists are used for the initialization/finalization - of each individual shared library (respectively), we give these symbols - only internal (i.e. `static') linkage, and we also make it a point to - refer to only the __CTOR_END__ symbol in crtend.o and the __DTOR_LIST__ - symbol in crtbegin.o, where they are defined. */ - -/* The -1 is a flag to __do_global_[cd]tors indicating that this table - does not start with a count of elements. */ -#ifdef CTOR_LIST_BEGIN -CTOR_LIST_BEGIN; -#elif defined(CTORS_SECTION_ASM_OP) -/* Hack: force cc1 to switch to .data section early, so that assembling - __CTOR_LIST__ does not undo our behind-the-back change to .ctors. */ -static func_ptr force_to_data[1] __attribute__ ((__unused__)) = { }; -asm (CTORS_SECTION_ASM_OP); -STATIC func_ptr __CTOR_LIST__[1] - __attribute__ ((__unused__, aligned(sizeof(func_ptr)))) - = { (func_ptr) (-1) }; -#else -STATIC func_ptr __CTOR_LIST__[1] - __attribute__ ((__unused__, section(".ctors"), aligned(sizeof(func_ptr)))) - = { (func_ptr) (-1) }; -#endif /* __CTOR_LIST__ alternatives */ - -#ifdef DTOR_LIST_BEGIN -DTOR_LIST_BEGIN; -#elif defined(DTORS_SECTION_ASM_OP) -asm (DTORS_SECTION_ASM_OP); -STATIC func_ptr __DTOR_LIST__[1] - __attribute__ ((aligned(sizeof(func_ptr)))) - = { (func_ptr) (-1) }; -#else -STATIC func_ptr __DTOR_LIST__[1] - __attribute__((section(".dtors"), aligned(sizeof(func_ptr)))) - = { (func_ptr) (-1) }; -#endif /* __DTOR_LIST__ alternatives */ - -#ifdef USE_EH_FRAME_REGISTRY -/* Stick a label at the beginning of the frame unwind info so we can register - and deregister it with the exception handling library code. */ -STATIC EH_FRAME_SECTION_CONST char __EH_FRAME_BEGIN__[] - __attribute__((section(EH_FRAME_SECTION_NAME), aligned(4))) - = { }; -#endif /* USE_EH_FRAME_REGISTRY */ - -#ifdef JCR_SECTION_NAME -/* Stick a label at the beginning of the java class registration info - so we can register them properly. */ -STATIC void *__JCR_LIST__[] - __attribute__ ((unused, section(JCR_SECTION_NAME), aligned(sizeof(void*)))) - = { }; -#endif /* JCR_SECTION_NAME */ - -#if defined(INIT_SECTION_ASM_OP) || defined(INIT_ARRAY_SECTION_ASM_OP) - -#ifdef OBJECT_FORMAT_ELF - -/* Declare the __dso_handle variable. It should have a unique value - in every shared-object; in a main program its value is zero. The - object should in any case be protected. This means the instance - in one DSO or the main program is not used in another object. The - dynamic linker takes care of this. */ - -#ifdef TARGET_LIBGCC_SDATA_SECTION -extern void *__dso_handle __attribute__ ((__section__ (TARGET_LIBGCC_SDATA_SECTION))); -#endif -#ifdef HAVE_GAS_HIDDEN -extern void *__dso_handle __attribute__ ((__visibility__ ("hidden"))); -#endif -#ifdef CRTSTUFFS_O -void *__dso_handle = &__dso_handle; -#else -void *__dso_handle = 0; -#endif - -/* The __cxa_finalize function may not be available so we use only a - weak declaration. */ -extern void __cxa_finalize (void *) TARGET_ATTRIBUTE_WEAK; - -/* Run all the global destructors on exit from the program. */ - -/* Some systems place the number of pointers in the first word of the - table. On SVR4 however, that word is -1. In all cases, the table is - null-terminated. On SVR4, we start from the beginning of the list and - invoke each per-compilation-unit destructor routine in order - until we find that null. - - Note that this function MUST be static. There will be one of these - functions in each root executable and one in each shared library, but - although they all have the same code, each one is unique in that it - refers to one particular associated `__DTOR_LIST__' which belongs to the - same particular root executable or shared library file. - - On some systems, this routine is run more than once from the .fini, - when exit is called recursively, so we arrange to remember where in - the list we left off processing, and we resume at that point, - should we be re-invoked. */ - -static void __attribute__((used)) -__do_global_dtors_aux (void) -{ -#ifndef FINI_ARRAY_SECTION_ASM_OP - static func_ptr *p = __DTOR_LIST__ + 1; - func_ptr f; -#endif /* !defined(FINI_ARRAY_SECTION_ASM_OP) */ - static _Bool completed; - - if (__builtin_expect (completed, 0)) - return; - -#ifdef CRTSTUFFS_O - if (__cxa_finalize) - __cxa_finalize (__dso_handle); -#endif - -#ifdef FINI_ARRAY_SECTION_ASM_OP - /* If we are using .fini_array then destructors will be run via that - mechanism. */ -#else /* !defined (FINI_ARRAY_SECTION_ASM_OP) */ - while ((f = *p)) - { - p++; - f (); - } -#endif /* !defined(FINI_ARRAY_SECTION_ASM_OP) */ - -#ifdef USE_EH_FRAME_REGISTRY -#ifdef CRT_GET_RFIB_DATA - /* If we used the new __register_frame_info_bases interface, - make sure that we deregister from the same place. */ - if (__deregister_frame_info_bases) - __deregister_frame_info_bases (__EH_FRAME_BEGIN__); -#else - if (__deregister_frame_info) - __deregister_frame_info (__EH_FRAME_BEGIN__); -#endif -#endif - - completed = 1; -} - -/* Stick a call to __do_global_dtors_aux into the .fini section. */ -#ifdef FINI_SECTION_ASM_OP -CRT_CALL_STATIC_FUNCTION (FINI_SECTION_ASM_OP, __do_global_dtors_aux) -#else /* !defined(FINI_SECTION_ASM_OP) */ -static func_ptr __do_global_dtors_aux_fini_array_entry[] - __attribute__ ((__unused__, section(".fini_array"))) - = { __do_global_dtors_aux }; -#endif /* !defined(FINI_SECTION_ASM_OP) */ - -#if defined(USE_EH_FRAME_REGISTRY) || defined(JCR_SECTION_NAME) -/* Stick a call to __register_frame_info into the .init section. For some - reason calls with no arguments work more reliably in .init, so stick the - call in another function. */ - -static void __attribute__((used)) -frame_dummy (void) -{ -#ifdef USE_EH_FRAME_REGISTRY - static struct object object; -#ifdef CRT_GET_RFIB_DATA - void *tbase, *dbase; - tbase = 0; - CRT_GET_RFIB_DATA (dbase); - if (__register_frame_info_bases) - __register_frame_info_bases (__EH_FRAME_BEGIN__, &object, tbase, dbase); -#else - if (__register_frame_info) - __register_frame_info (__EH_FRAME_BEGIN__, &object); -#endif /* CRT_GET_RFIB_DATA */ -#endif /* USE_EH_FRAME_REGISTRY */ -#ifdef JCR_SECTION_NAME - if (__JCR_LIST__[0]) - { - void (*register_classes) (void *) = _Jv_RegisterClasses; - __asm ("" : "+r" (register_classes)); - if (register_classes) - register_classes (__JCR_LIST__); - } -#endif /* JCR_SECTION_NAME */ -} - -#ifdef INIT_SECTION_ASM_OP -CRT_CALL_STATIC_FUNCTION (INIT_SECTION_ASM_OP, frame_dummy) -#else /* defined(INIT_SECTION_ASM_OP) */ -static func_ptr __frame_dummy_init_array_entry[] - __attribute__ ((__unused__, section(".init_array"))) - = { frame_dummy }; -#endif /* !defined(INIT_SECTION_ASM_OP) */ -#endif /* USE_EH_FRAME_REGISTRY || JCR_SECTION_NAME */ - -#else /* OBJECT_FORMAT_ELF */ - -/* The function __do_global_ctors_aux is compiled twice (once in crtbegin.o - and once in crtend.o). It must be declared static to avoid a link - error. Here, we define __do_global_ctors as an externally callable - function. It is externally callable so that __main can invoke it when - INVOKE__main is defined. This has the additional effect of forcing cc1 - to switch to the .text section. */ - -static void __do_global_ctors_aux (void); -void -__do_global_ctors (void) -{ -#ifdef INVOKE__main - /* If __main won't actually call __do_global_ctors then it doesn't matter - what's inside the function. The inside of __do_global_ctors_aux is - called automatically in that case. And the Alliant fx2800 linker - crashes on this reference. So prevent the crash. */ - __do_global_ctors_aux (); -#endif -} - -asm (INIT_SECTION_ASM_OP); /* cc1 doesn't know that we are switching! */ - -/* A routine to invoke all of the global constructors upon entry to the - program. We put this into the .init section (for systems that have - such a thing) so that we can properly perform the construction of - file-scope static-storage C++ objects within shared libraries. */ - -static void __attribute__((used)) -__do_global_ctors_aux (void) /* prologue goes in .init section */ -{ - FORCE_CODE_SECTION_ALIGN /* explicit align before switch to .text */ - asm (TEXT_SECTION_ASM_OP); /* don't put epilogue and body in .init */ - DO_GLOBAL_CTORS_BODY; - atexit (__do_global_dtors); -} - -#endif /* OBJECT_FORMAT_ELF */ - -#elif defined(HAS_INIT_SECTION) /* ! INIT_SECTION_ASM_OP */ - -extern void __do_global_dtors (void); - -/* This case is used by the Irix 6 port, which supports named sections but - not an SVR4-style .fini section. __do_global_dtors can be non-static - in this case because we protect it with -hidden_symbol. */ - -void -__do_global_dtors (void) -{ - func_ptr *p, f; - for (p = __DTOR_LIST__ + 1; (f = *p); p++) - f (); - -#ifdef USE_EH_FRAME_REGISTRY - if (__deregister_frame_info) - __deregister_frame_info (__EH_FRAME_BEGIN__); -#endif -} - -#if defined(USE_EH_FRAME_REGISTRY) || defined(JCR_SECTION_NAME) -/* A helper function for __do_global_ctors, which is in crtend.o. Here - in crtbegin.o, we can reference a couple of symbols not visible there. - Plus, since we're before libgcc.a, we have no problems referencing - functions from there. */ -void -__do_global_ctors_1(void) -{ -#ifdef USE_EH_FRAME_REGISTRY - static struct object object; - if (__register_frame_info) - __register_frame_info (__EH_FRAME_BEGIN__, &object); -#endif -#ifdef JCR_SECTION_NAME - if (__JCR_LIST__[0]) - { - void (*register_classes) (void *) = _Jv_RegisterClasses; - __asm ("" : "+r" (register_classes)); - if (register_classes) - register_classes (__JCR_LIST__); - } -#endif -} -#endif /* USE_EH_FRAME_REGISTRY || JCR_SECTION_NAME */ - -#else /* ! INIT_SECTION_ASM_OP && ! HAS_INIT_SECTION */ -#error "What are you doing with crtstuff.c, then?" -#endif - -#elif defined(CRT_END) /* ! CRT_BEGIN */ - -/* Put a word containing zero at the end of each of our two lists of function - addresses. Note that the words defined here go into the .ctors and .dtors - sections of the crtend.o file, and since that file is always linked in - last, these words naturally end up at the very ends of the two lists - contained in these two sections. */ - -#ifdef CTOR_LIST_END -CTOR_LIST_END; -#elif defined(CTORS_SECTION_ASM_OP) -/* Hack: force cc1 to switch to .data section early, so that assembling - __CTOR_LIST__ does not undo our behind-the-back change to .ctors. */ -static func_ptr force_to_data[1] __attribute__ ((__unused__)) = { }; -asm (CTORS_SECTION_ASM_OP); -STATIC func_ptr __CTOR_END__[1] - __attribute__((aligned(sizeof(func_ptr)))) - = { (func_ptr) 0 }; -#else -STATIC func_ptr __CTOR_END__[1] - __attribute__((section(".ctors"), aligned(sizeof(func_ptr)))) - = { (func_ptr) 0 }; -#endif - -#ifdef DTOR_LIST_END -DTOR_LIST_END; -#elif defined(DTORS_SECTION_ASM_OP) -asm (DTORS_SECTION_ASM_OP); -STATIC func_ptr __DTOR_END__[1] - __attribute__ ((unused, aligned(sizeof(func_ptr)))) - = { (func_ptr) 0 }; -#else -STATIC func_ptr __DTOR_END__[1] - __attribute__((unused, section(".dtors"), aligned(sizeof(func_ptr)))) - = { (func_ptr) 0 }; -#endif - -#ifdef EH_FRAME_SECTION_NAME -/* Terminate the frame unwind info section with a 4byte 0 as a sentinel; - this would be the 'length' field in a real FDE. */ -# if __INT_MAX__ == 2147483647 -typedef int int32; -# elif __LONG_MAX__ == 2147483647 -typedef long int32; -# elif __SHRT_MAX__ == 2147483647 -typedef short int32; -# else -# error "Missing a 4 byte integer" -# endif -STATIC EH_FRAME_SECTION_CONST int32 __FRAME_END__[] - __attribute__ ((unused, section(EH_FRAME_SECTION_NAME), - aligned(sizeof(int32)))) - = { 0 }; -#endif /* EH_FRAME_SECTION_NAME */ - -#ifdef JCR_SECTION_NAME -/* Null terminate the .jcr section array. */ -STATIC void *__JCR_END__[1] - __attribute__ ((unused, section(JCR_SECTION_NAME), - aligned(sizeof(void *)))) - = { 0 }; -#endif /* JCR_SECTION_NAME */ - -#ifdef INIT_ARRAY_SECTION_ASM_OP - -/* If we are using .init_array, there is nothing to do. */ - -#elif defined(INIT_SECTION_ASM_OP) - -#ifdef OBJECT_FORMAT_ELF -static void __attribute__((used)) -__do_global_ctors_aux (void) -{ - func_ptr *p; - for (p = __CTOR_END__ - 1; *p != (func_ptr) -1; p--) - (*p) (); -} - -/* Stick a call to __do_global_ctors_aux into the .init section. */ -CRT_CALL_STATIC_FUNCTION (INIT_SECTION_ASM_OP, __do_global_ctors_aux) -#else /* OBJECT_FORMAT_ELF */ - -/* Stick the real initialization code, followed by a normal sort of - function epilogue at the very end of the .init section for this - entire root executable file or for this entire shared library file. - - Note that we use some tricks here to get *just* the body and just - a function epilogue (but no function prologue) into the .init - section of the crtend.o file. Specifically, we switch to the .text - section, start to define a function, and then we switch to the .init - section just before the body code. - - Earlier on, we put the corresponding function prologue into the .init - section of the crtbegin.o file (which will be linked in first). - - Note that we want to invoke all constructors for C++ file-scope static- - storage objects AFTER any other possible initialization actions which - may be performed by the code in the .init section contributions made by - other libraries, etc. That's because those other initializations may - include setup operations for very primitive things (e.g. initializing - the state of the floating-point coprocessor, etc.) which should be done - before we start to execute any of the user's code. */ - -static void -__do_global_ctors_aux (void) /* prologue goes in .text section */ -{ - asm (INIT_SECTION_ASM_OP); - DO_GLOBAL_CTORS_BODY; - atexit (__do_global_dtors); -} /* epilogue and body go in .init section */ - -FORCE_CODE_SECTION_ALIGN -asm (TEXT_SECTION_ASM_OP); - -#endif /* OBJECT_FORMAT_ELF */ - -#elif defined(HAS_INIT_SECTION) /* ! INIT_SECTION_ASM_OP */ - -extern void __do_global_ctors (void); - -/* This case is used by the Irix 6 port, which supports named sections but - not an SVR4-style .init section. __do_global_ctors can be non-static - in this case because we protect it with -hidden_symbol. */ -void -__do_global_ctors (void) -{ - func_ptr *p; -#if defined(USE_EH_FRAME_REGISTRY) || defined(JCR_SECTION_NAME) - __do_global_ctors_1(); -#endif - for (p = __CTOR_END__ - 1; *p != (func_ptr) -1; p--) - (*p) (); -} - -#else /* ! INIT_SECTION_ASM_OP && ! HAS_INIT_SECTION */ -#error "What are you doing with crtstuff.c, then?" -#endif - -#else /* ! CRT_BEGIN && ! CRT_END */ -#error "One of CRT_BEGIN or CRT_END must be defined." -#endif |