Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/host-darwin.c @ 67:f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
| author | nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Tue, 22 Mar 2011 17:18:12 +0900 |
| parents | a06113de4d67 |
| children | 04ced10e8804 |
| rev | line source |
|---|---|
| 0 | 1 /* Darwin host-specific hook definitions. |
|
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2 Copyright (C) 2003, 2004, 2005, 2007, 2010 Free Software Foundation, Inc. |
| 0 | 3 |
| 4 This file is part of GCC. | |
| 5 | |
| 6 GCC is free software; you can redistribute it and/or modify it | |
| 7 under the terms of the GNU General Public License as published | |
| 8 by the Free Software Foundation; either version 3, or (at your | |
| 9 option) any later version. | |
| 10 | |
| 11 GCC is distributed in the hope that it will be useful, but WITHOUT | |
| 12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
| 13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
| 14 License for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU General Public License | |
| 17 along with GCC; see the file COPYING3. If not see | |
| 18 <http://www.gnu.org/licenses/>. */ | |
| 19 | |
| 20 #include "config.h" | |
| 21 #include "system.h" | |
| 22 #include "coretypes.h" | |
|
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
23 #include "diagnostic-core.h" |
| 0 | 24 #include "config/host-darwin.h" |
| 25 | |
| 26 /* Yes, this is really supposed to work. */ | |
| 27 static char pch_address_space[1024*1024*1024] __attribute__((aligned (4096))); | |
| 28 | |
| 29 /* Return the address of the PCH address space, if the PCH will fit in it. */ | |
| 30 | |
| 31 void * | |
| 32 darwin_gt_pch_get_address (size_t sz, int fd ATTRIBUTE_UNUSED) | |
| 33 { | |
| 34 if (sz <= sizeof (pch_address_space)) | |
| 35 return pch_address_space; | |
| 36 else | |
| 37 return NULL; | |
| 38 } | |
| 39 | |
| 40 /* Check ADDR and SZ for validity, and deallocate (using munmap) that part of | |
| 41 pch_address_space beyond SZ. */ | |
| 42 | |
| 43 int | |
| 44 darwin_gt_pch_use_address (void *addr, size_t sz, int fd, size_t off) | |
| 45 { | |
| 46 const size_t pagesize = getpagesize(); | |
| 47 void *mmap_result; | |
| 48 int ret; | |
| 49 | |
| 50 gcc_assert ((size_t)pch_address_space % pagesize == 0 | |
| 51 && sizeof (pch_address_space) % pagesize == 0); | |
| 52 | |
| 53 ret = (addr == pch_address_space && sz <= sizeof (pch_address_space)); | |
| 54 if (! ret) | |
| 55 sz = 0; | |
| 56 | |
| 57 /* Round the size to a whole page size. Normally this is a no-op. */ | |
| 58 sz = (sz + pagesize - 1) / pagesize * pagesize; | |
| 59 | |
| 60 if (munmap (pch_address_space + sz, sizeof (pch_address_space) - sz) != 0) | |
|
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
61 fatal_error ("couldn%'t unmap pch_address_space: %m"); |
| 0 | 62 |
| 63 if (ret) | |
| 64 { | |
| 65 mmap_result = mmap (addr, sz, | |
| 66 PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, | |
| 67 fd, off); | |
| 68 | |
| 69 /* The file might not be mmap-able. */ | |
| 70 ret = mmap_result != (void *) MAP_FAILED; | |
| 71 | |
| 72 /* Sanity check for broken MAP_FIXED. */ | |
| 73 gcc_assert (!ret || mmap_result == addr); | |
| 74 } | |
| 75 | |
| 76 return ret; | |
| 77 } |