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/* Solaris host-specific hook definitions.
Copyright (C) 2004 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 2, 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 COPYING. If not, write to the
Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA. */
#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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