86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
|
/* OpenBSD host-specific hook definitions.
|
|||
|
|
Copyright (C) 2004-2021 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 "hosthooks.h"
|
|||
|
|
#include "hosthooks-def.h"
|
|||
|
|
|
|||
|
|
|
|||
|
|
#undef HOST_HOOKS_GT_PCH_GET_ADDRESS
|
|||
|
|
#define HOST_HOOKS_GT_PCH_GET_ADDRESS openbsd_gt_pch_get_address
|
|||
|
|
#undef HOST_HOOKS_GT_PCH_USE_ADDRESS
|
|||
|
|
#define HOST_HOOKS_GT_PCH_USE_ADDRESS openbsd_gt_pch_use_address
|
|||
|
|
|
|||
|
|
/* For various ports, try to guess a fixed spot in the vm space
|
|||
|
|
that's probably free. */
|
|||
|
|
#if defined(__amd64__)
|
|||
|
|
# define TRY_EMPTY_VM_SPACE 0x400000000000
|
|||
|
|
#elif defined(__hppa__)
|
|||
|
|
# define TRY_EMPTY_VM_SPACE 0xb0000000
|
|||
|
|
#elif defined(__i386__)
|
|||
|
|
# define TRY_EMPTY_VM_SPACE 0xb0000000
|
|||
|
|
#else
|
|||
|
|
# define TRY_EMPTY_VM_SPACE 0
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
/* Determine a location where we might be able to reliably allocate
|
|||
|
|
SIZE bytes. FD is the PCH file, though we should return with the
|
|||
|
|
file unmapped. */
|
|||
|
|
|
|||
|
|
static void *
|
|||
|
|
openbsd_gt_pch_get_address (size_t size, int fd)
|
|||
|
|
{
|
|||
|
|
void *addr;
|
|||
|
|
|
|||
|
|
addr = mmap ((void *) TRY_EMPTY_VM_SPACE, size, PROT_READ | PROT_WRITE,
|
|||
|
|
MAP_PRIVATE, fd, 0);
|
|||
|
|
|
|||
|
|
/* If we failed the map, that means there's *no* free space. */
|
|||
|
|
if (addr == (void *) MAP_FAILED)
|
|||
|
|
return NULL;
|
|||
|
|
/* Unmap the area before returning. */
|
|||
|
|
munmap (addr, size);
|
|||
|
|
|
|||
|
|
return addr;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* 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
|
|||
|
|
openbsd_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);
|
|||
|
|
|
|||
|
|
return addr == base ? 1 : -1;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
const struct host_hooks host_hooks = HOST_HOOKS_INITIALIZER;
|