1/* Solaris host-specific hook definitions. 2 Copyright (C) 2004 Free Software Foundation, Inc. 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 2, 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 COPYING. If not, write to the 18 Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston, 19 MA 02110-1301, USA. */ 20 21#include "config.h" 22#include "system.h" 23#include "coretypes.h" 24#include <sys/mman.h> 25#include "hosthooks.h" 26#include "hosthooks-def.h" 27 28 29#undef HOST_HOOKS_GT_PCH_USE_ADDRESS 30#define HOST_HOOKS_GT_PCH_USE_ADDRESS sol_gt_pch_use_address 31 32/* Map SIZE bytes of FD+OFFSET at BASE. Return 1 if we succeeded at 33 mapping the data at BASE, -1 if we couldn't. */ 34 35static int 36sol_gt_pch_use_address (void *base, size_t size, int fd, size_t offset) 37{ 38 void *addr; 39 40 /* We're called with size == 0 if we're not planning to load a PCH 41 file at all. This allows the hook to free any static space that 42 we might have allocated at link time. */ 43 if (size == 0) 44 return -1; 45 46 addr = mmap (base, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, 47 fd, offset); 48 49 /* Solaris isn't good about honoring the mmap START parameter 50 without MAP_FIXED set. Before we give up, search the desired 51 address space with mincore to see if the space is really free. */ 52 if (addr != base) 53 { 54 size_t page_size = getpagesize(); 55 char one_byte; 56 size_t i; 57 58 if (addr != (void *) MAP_FAILED) 59 munmap (addr, size); 60 61 errno = 0; 62 for (i = 0; i < size; i += page_size) 63 if (mincore ((char *)base + i, page_size, (void *)&one_byte) == -1 64 && errno == ENOMEM) 65 continue; /* The page is not mapped. */ 66 else 67 break; 68 69 if (i >= size) 70 addr = mmap (base, size, 71 PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, 72 fd, offset); 73 } 74 75 return addr == base ? 1 : -1; 76} 77 78 79const struct host_hooks host_hooks = HOST_HOOKS_INITIALIZER; 80