106 lines
3.0 KiB
C
106 lines
3.0 KiB
C
/* Provide the runtime infrastructure for the transactional memory lib.
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Copyright (C) 2011-2017 Free Software Foundation, Inc.
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Contributed by Iain Sandoe <iains@gcc.gnu.org>
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "tsystem.h"
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#include <stddef.h>
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#include <dlfcn.h>
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#include <mach-o/dyld.h>
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#include <mach-o/getsect.h>
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#ifdef __LP64__
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#define GET_DATA_TMCT(mh,size) \
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getsectdatafromheader_64 ((struct mach_header_64*) mh, \
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"__DATA", "__tm_clone_table", (uint64_t *)size)
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#else
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#define GET_DATA_TMCT(mh,size) \
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getsectdatafromheader (mh, "__DATA", "__tm_clone_table", (uint32_t *)size)
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#endif
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#define WEAK __attribute__((weak))
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extern void _ITM_registerTMCloneTable (void *, size_t) WEAK;
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extern void _ITM_deregisterTMCloneTable (void *) WEAK;
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#if defined(START) || defined(END)
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static inline void *getTMCloneTable (const void *f, size_t *tmct_siz)
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{
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char *tmct_fixed, *tmct = NULL;
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unsigned int i, img_count;
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struct mach_header *mh;
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Dl_info info;
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if (! dladdr (f, &info) || info.dli_fbase == NULL)
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abort ();
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mh = (struct mach_header *) info.dli_fbase;
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tmct_fixed = GET_DATA_TMCT (mh, tmct_siz);
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*tmct_siz /= (sizeof (size_t) * 2);
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/* No tm_clone_table or no clones. */
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if (tmct_fixed == NULL || *tmct_siz == 0)
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return NULL;
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img_count = _dyld_image_count();
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for (i = 0; i < img_count && tmct == NULL; i++)
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{
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if (mh == _dyld_get_image_header(i))
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tmct = tmct_fixed + (unsigned long)_dyld_get_image_vmaddr_slide(i);
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}
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return tmct;
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}
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#endif
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#ifdef START
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void __doTMRegistrations (void) __attribute__ ((constructor));
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void __doTMRegistrations (void)
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{
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size_t tmct_siz;
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void *tmct;
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tmct = getTMCloneTable ((const void *)&__doTMRegistrations, &tmct_siz);
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if (_ITM_registerTMCloneTable != NULL && tmct != NULL)
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_ITM_registerTMCloneTable (tmct, (size_t)tmct_siz);
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}
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#endif
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#ifdef END
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void __doTMdeRegistrations (void) __attribute__ ((destructor));
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void __doTMdeRegistrations (void)
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{
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size_t tmct_siz;
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void *tmct;
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tmct = getTMCloneTable ((const void *)&__doTMdeRegistrations, &tmct_siz);
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if (_ITM_deregisterTMCloneTable != NULL && tmct != NULL)
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_ITM_deregisterTMCloneTable (tmct);
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}
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#endif
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