80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
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/* Solaris host-specific hook definitions.
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Copyright (C) 2004 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 2, or (at your
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option) any later version.
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GCC is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the
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Free Software Foundation, 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA. */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include <sys/mman.h>
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#include "hosthooks.h"
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#include "hosthooks-def.h"
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#undef HOST_HOOKS_GT_PCH_USE_ADDRESS
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#define HOST_HOOKS_GT_PCH_USE_ADDRESS sol_gt_pch_use_address
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/* Map SIZE bytes of FD+OFFSET at BASE. Return 1 if we succeeded at
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mapping the data at BASE, -1 if we couldn't. */
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static int
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sol_gt_pch_use_address (void *base, size_t size, int fd, size_t offset)
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{
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void *addr;
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/* We're called with size == 0 if we're not planning to load a PCH
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file at all. This allows the hook to free any static space that
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we might have allocated at link time. */
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if (size == 0)
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return -1;
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addr = mmap (base, size, PROT_READ | PROT_WRITE, MAP_PRIVATE,
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fd, offset);
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/* Solaris isn't good about honoring the mmap START parameter
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without MAP_FIXED set. Before we give up, search the desired
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address space with mincore to see if the space is really free. */
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if (addr != base)
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{
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size_t page_size = getpagesize();
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char one_byte;
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size_t i;
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if (addr != (void *) MAP_FAILED)
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munmap (addr, size);
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errno = 0;
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for (i = 0; i < size; i += page_size)
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if (mincore ((char *)base + i, page_size, (void *)&one_byte) == -1
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&& errno == ENOMEM)
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continue; /* The page is not mapped. */
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else
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break;
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if (i >= size)
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addr = mmap (base, size,
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PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED,
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fd, offset);
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}
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return addr == base ? 1 : -1;
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}
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const struct host_hooks host_hooks = HOST_HOOKS_INITIALIZER;
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