diff options
Diffstat (limited to 'gcc-4.9/libgcc/config/darwin-crt-tm.c')
-rw-r--r-- | gcc-4.9/libgcc/config/darwin-crt-tm.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/gcc-4.9/libgcc/config/darwin-crt-tm.c b/gcc-4.9/libgcc/config/darwin-crt-tm.c new file mode 100644 index 000000000..e11a0afb8 --- /dev/null +++ b/gcc-4.9/libgcc/config/darwin-crt-tm.c @@ -0,0 +1,105 @@ +/* Provide the runtime infrastructure for the transactional memory lib. + Copyright (C) 2011-2014 Free Software Foundation, Inc. + Contributed by Iain Sandoe <iains@gcc.gnu.org> + + 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 3, or (at your option) any later +version. + +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. + +Under Section 7 of GPL version 3, you are granted additional +permissions described in the GCC Runtime Library Exception, version +3.1, as published by the Free Software Foundation. + +You should have received a copy of the GNU General Public License and +a copy of the GCC Runtime Library Exception along with this program; +see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +<http://www.gnu.org/licenses/>. */ + +#include "tsystem.h" +#include <stddef.h> +#include <dlfcn.h> +#include <mach-o/dyld.h> +#include <mach-o/getsect.h> + +#ifdef __LP64__ +#define GET_DATA_TMCT(mh,size) \ + getsectdatafromheader_64 ((struct mach_header_64*) mh, \ + "__DATA", "__tm_clone_table", (uint64_t *)size) +#else +#define GET_DATA_TMCT(mh,size) \ + getsectdatafromheader (mh, "__DATA", "__tm_clone_table", (uint32_t *)size) +#endif + +#define WEAK __attribute__((weak)) + +extern void _ITM_registerTMCloneTable (void *, size_t) WEAK; +extern void _ITM_deregisterTMCloneTable (void *) WEAK; + +#if defined(START) || defined(END) +static inline void *getTMCloneTable (const void *f, size_t *tmct_siz) +{ + char *tmct_fixed, *tmct = NULL; + unsigned int i, img_count; + struct mach_header *mh; + Dl_info info; + + if (! dladdr (f, &info) || info.dli_fbase == NULL) + abort (); + + mh = (struct mach_header *) info.dli_fbase; + tmct_fixed = GET_DATA_TMCT (mh, tmct_siz); + *tmct_siz /= (sizeof (size_t) * 2); + /* No tm_clone_table or no clones. */ + if (tmct_fixed == NULL || *tmct_siz == 0) + return NULL; + + img_count = _dyld_image_count(); + for (i = 0; i < img_count && tmct == NULL; i++) + { + if (mh == _dyld_get_image_header(i)) + tmct = tmct_fixed + (unsigned long)_dyld_get_image_vmaddr_slide(i); + } + + return tmct; +} +#endif + +#ifdef START + +void __doTMRegistrations (void) __attribute__ ((constructor)); + +void __doTMRegistrations (void) +{ + size_t tmct_siz; + void *tmct; + + tmct = getTMCloneTable ((const void *)&__doTMRegistrations, &tmct_siz); + if (_ITM_registerTMCloneTable != NULL && tmct != NULL) + _ITM_registerTMCloneTable (tmct, (size_t)tmct_siz); +} + +#endif + +#ifdef END + +void __doTMdeRegistrations (void) __attribute__ ((destructor)); + +void __doTMdeRegistrations (void) +{ + size_t tmct_siz; + void *tmct; + + tmct = getTMCloneTable ((const void *)&__doTMdeRegistrations, &tmct_siz); + if (_ITM_deregisterTMCloneTable != NULL && tmct != NULL) + _ITM_deregisterTMCloneTable (tmct); +} + +#endif |