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37a1fdee4f
constructors are invoked, and after all local destructors have been invoked. git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@15205 87f5fb63-7c3d-0410-a384-fd976d0f7a62
182 lines
4.2 KiB
C
182 lines
4.2 KiB
C
/*
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* $Id: crtbegin.c,v 1.12 2010-08-21 09:57:50 obarthel Exp $
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*
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* :ts=4
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*
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* Handles global constructors and destructors for the OS4 GCC build.
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*/
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#if defined(__amigaos4__)
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/****************************************************************************/
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#ifndef _STDLIB_HEADERS_H
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#include "stdlib_headers.h"
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#endif /* _STDLIB_HEADERS_H */
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/****************************************************************************/
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#include <libraries/elf.h>
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#include <proto/elf.h>
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#include <proto/dos.h>
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/****************************************************************************/
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/*
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* Dummy constructor and destructor array. The linker script will put these at the
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* very beginning of section ".ctors" and ".dtors". crtend.o contains a similar entry
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* with a NULL pointer entry and is put at the end of the sections. This way, the init
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* code can find the global constructor/destructor pointers
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*/
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static void (*__CTOR_LIST__[1]) (void) __attribute__(( used, section(".ctors"), aligned(sizeof(void (*)(void))) ));
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static void (*__DTOR_LIST__[1]) (void) __attribute__(( used, section(".dtors"), aligned(sizeof(void (*)(void))) ));
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/****************************************************************************/
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void _init(void);
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void _fini(void);
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/****************************************************************************/
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/* These are used to initialize the shared objects linked to this binary,
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and for the dlopen(), dlclose() and dlsym() functions. */
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struct Library * __ElfBase;
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struct ElfIFace * __IElf;
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Elf32_Handle __elf_handle;
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/****************************************************************************/
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static VOID close_elf_library(void)
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{
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if(__IElf != NULL)
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{
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DropInterface((struct Interface *)__IElf);
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__IElf = NULL;
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}
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if(__ElfBase != NULL)
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{
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CloseLibrary(__ElfBase);
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__ElfBase = NULL;
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}
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}
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/****************************************************************************/
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static BOOL open_elf_library(void)
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{
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BOOL success = FALSE;
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/* We need elf.library V52.2 or higher. */
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__ElfBase = OpenLibrary("elf.library",0);
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if(__ElfBase == NULL || (__ElfBase->lib_Version < 52) || (__ElfBase->lib_Version == 52 && __ElfBase->lib_Revision < 2))
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goto out;
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__IElf = (struct ElfIFace *)GetInterface(__ElfBase,"main",1,NULL);
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if(__IElf == NULL)
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goto out;
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success = TRUE;
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out:
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return(success);
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}
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/****************************************************************************/
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static void shared_obj_exit(void)
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{
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/* If we got what we wanted, trigger the destructors,
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etc. in the shared objects linked to this binary. */
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if(__elf_handle != NULL)
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InitSHLibs(__elf_handle,FALSE);
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close_elf_library();
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}
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/****************************************************************************/
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static void shared_obj_init(void)
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{
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struct ElfIFace * IElf;
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BOOL success = FALSE;
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BPTR segment_list;
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if(!open_elf_library())
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goto out;
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/* Try to find the Elf handle associated with this
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program's segment list. */
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segment_list = GetProcSegList(NULL,GPSLF_CLI | GPSLF_SEG);
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if(segment_list == ZERO)
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goto out;
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if(GetSegListInfoTags(segment_list,
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GSLI_ElfHandle,&__elf_handle,
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TAG_DONE) != 1)
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{
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goto out;
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}
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if(__elf_handle == NULL)
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goto out;
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IElf = __IElf;
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/* Trigger the constructors, etc. in the shared objects
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linked to this binary. */
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InitSHLibs(__elf_handle,TRUE);
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success = TRUE;
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out:
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if(!success)
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close_elf_library();
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}
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/****************************************************************************/
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void
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_init(void)
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{
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int num_ctors,i;
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int j;
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/* The shared objects need to be set up before any local
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constructors are invoked. */
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shared_obj_init();
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for(i = 1, num_ctors = 0 ; __CTOR_LIST__[i] != NULL ; i++)
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num_ctors++;
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for(j = 0 ; j < num_ctors ; j++)
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__CTOR_LIST__[num_ctors - j]();
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}
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/****************************************************************************/
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void
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_fini(void)
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{
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int num_dtors,i;
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static int j;
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for(i = 1, num_dtors = 0 ; __DTOR_LIST__[i] != NULL ; i++)
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num_dtors++;
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while(j++ < num_dtors)
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__DTOR_LIST__[j]();
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/* The shared objects need to be cleaned up after all local
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destructors have been invoked. */
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shared_obj_exit();
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}
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/****************************************************************************/
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#endif /*__amigaos4__ */
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