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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.2.2/] [gcc/] [config/] [host-solaris.c] - Rev 348
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/* Solaris host-specific hook definitions. Copyright (C) 2004, 2007 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 <sys/mman.h> #include "hosthooks.h" #include "hosthooks-def.h" #undef HOST_HOOKS_GT_PCH_USE_ADDRESS #define HOST_HOOKS_GT_PCH_USE_ADDRESS sol_gt_pch_use_address /* Map SIZE bytes of FD+OFFSET at BASE. Return 1 if we succeeded at mapping the data at BASE, -1 if we couldn't. */ static int sol_gt_pch_use_address (void *base, size_t size, int fd, size_t offset) { void *addr; /* We're called with size == 0 if we're not planning to load a PCH file at all. This allows the hook to free any static space that we might have allocated at link time. */ if (size == 0) return -1; addr = mmap (base, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, offset); /* Solaris isn't good about honoring the mmap START parameter without MAP_FIXED set. Before we give up, search the desired address space with mincore to see if the space is really free. */ if (addr != base) { size_t page_size = getpagesize(); char one_byte; size_t i; if (addr != (void *) MAP_FAILED) munmap (addr, size); errno = 0; for (i = 0; i < size; i += page_size) if (mincore ((char *)base + i, page_size, (void *)&one_byte) == -1 && errno == ENOMEM) continue; /* The page is not mapped. */ else break; if (i >= size) addr = mmap (base, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, fd, offset); } return addr == base ? 1 : -1; } const struct host_hooks host_hooks = HOST_HOOKS_INITIALIZER;
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