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author | Ben Cheng <bccheng@google.com> | 2013-03-28 11:14:20 -0700 |
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committer | Ben Cheng <bccheng@google.com> | 2013-03-28 12:40:33 -0700 |
commit | af0c51ac87ab2a87caa03fa108f0d164987a2764 (patch) | |
tree | 4b8b470f7c5b69642fdab8d0aa1fbc148d02196b /gcc-4.8/gcc/config/host-darwin.c | |
parent | d87cae247d39ebf4f5a6bf25c932a14d2fdb9384 (diff) | |
download | toolchain_gcc-af0c51ac87ab2a87caa03fa108f0d164987a2764.tar.gz toolchain_gcc-af0c51ac87ab2a87caa03fa108f0d164987a2764.tar.bz2 toolchain_gcc-af0c51ac87ab2a87caa03fa108f0d164987a2764.zip |
[GCC 4.8] Initial check-in of GCC 4.8.0
Change-Id: I0719d8a6d0f69b367a6ab6f10eb75622dbf12771
Diffstat (limited to 'gcc-4.8/gcc/config/host-darwin.c')
-rw-r--r-- | gcc-4.8/gcc/config/host-darwin.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/gcc-4.8/gcc/config/host-darwin.c b/gcc-4.8/gcc/config/host-darwin.c new file mode 100644 index 000000000..7cfa52a8d --- /dev/null +++ b/gcc-4.8/gcc/config/host-darwin.c @@ -0,0 +1,77 @@ +/* Darwin host-specific hook definitions. + Copyright (C) 2003-2013 Free Software Foundation, Inc. + + 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. + + You should have received a copy of the GNU General Public License + along with GCC; see the file COPYING3. If not see + <http://www.gnu.org/licenses/>. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "diagnostic-core.h" +#include "config/host-darwin.h" + +/* Yes, this is really supposed to work. */ +static char pch_address_space[1024*1024*1024] __attribute__((aligned (4096))); + +/* Return the address of the PCH address space, if the PCH will fit in it. */ + +void * +darwin_gt_pch_get_address (size_t sz, int fd ATTRIBUTE_UNUSED) +{ + if (sz <= sizeof (pch_address_space)) + return pch_address_space; + else + return NULL; +} + +/* Check ADDR and SZ for validity, and deallocate (using munmap) that part of + pch_address_space beyond SZ. */ + +int +darwin_gt_pch_use_address (void *addr, size_t sz, int fd, size_t off) +{ + const size_t pagesize = getpagesize(); + void *mmap_result; + int ret; + + gcc_assert ((size_t)pch_address_space % pagesize == 0 + && sizeof (pch_address_space) % pagesize == 0); + + ret = (addr == pch_address_space && sz <= sizeof (pch_address_space)); + if (! ret) + sz = 0; + + /* Round the size to a whole page size. Normally this is a no-op. */ + sz = (sz + pagesize - 1) / pagesize * pagesize; + + if (munmap (pch_address_space + sz, sizeof (pch_address_space) - sz) != 0) + fatal_error ("couldn%'t unmap pch_address_space: %m"); + + if (ret) + { + mmap_result = mmap (addr, sz, + PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, + fd, off); + + /* The file might not be mmap-able. */ + ret = mmap_result != (void *) MAP_FAILED; + + /* Sanity check for broken MAP_FIXED. */ + gcc_assert (!ret || mmap_result == addr); + } + + return ret; +} |