126 lines
3.6 KiB
C
126 lines
3.6 KiB
C
/* Solaris 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 sol_gt_pch_get_address
|
||
#undef HOST_HOOKS_GT_PCH_USE_ADDRESS
|
||
#define HOST_HOOKS_GT_PCH_USE_ADDRESS sol_gt_pch_use_address
|
||
|
||
/* Before Solaris 11, the mmap ADDR parameter is mostly ignored without
|
||
MAP_FIXED set. Before we give up, search the desired address space with
|
||
mincore to see if the space is really free. */
|
||
|
||
static void *
|
||
mmap_fixed (void *addr, size_t len, int prot, int flags, int fd, off_t off)
|
||
{
|
||
void *base;
|
||
|
||
base = mmap ((caddr_t) addr, len, prot, flags, fd, off);
|
||
|
||
if (base != addr)
|
||
{
|
||
size_t page_size = getpagesize();
|
||
char one_byte;
|
||
size_t i;
|
||
|
||
if (base != (void *) MAP_FAILED)
|
||
munmap ((caddr_t) base, len);
|
||
|
||
errno = 0;
|
||
for (i = 0; i < len; i += page_size)
|
||
if (mincore ((char *)addr + i, page_size, (char *) &one_byte) == -1
|
||
&& errno == ENOMEM)
|
||
continue; /* The page is not mapped. */
|
||
else
|
||
break;
|
||
|
||
if (i >= len)
|
||
base = mmap ((caddr_t) addr, len, prot, flags | MAP_FIXED, fd, off);
|
||
}
|
||
|
||
return base;
|
||
}
|
||
|
||
/* For various ports, try to guess a fixed spot in the vm space
|
||
that's probably free. Based on McDougall, Mauro, Solaris Internals, 2nd
|
||
ed., p.460-461, fig. 9-3, 9-4, 9-5. */
|
||
#if defined(__sparcv9__)
|
||
/* This low to avoid VA hole on UltraSPARC I/II. */
|
||
# define TRY_EMPTY_VM_SPACE 0x70000000000
|
||
#elif defined(__sparc__)
|
||
# define TRY_EMPTY_VM_SPACE 0x80000000
|
||
#elif defined(__x86_64__)
|
||
# define TRY_EMPTY_VM_SPACE 0x80000000000
|
||
#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 *
|
||
sol_gt_pch_get_address (size_t size, int fd)
|
||
{
|
||
void *addr;
|
||
|
||
addr = mmap_fixed ((caddr_t) 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 ((caddr_t) 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
|
||
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_fixed ((caddr_t) base, size,
|
||
PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, offset);
|
||
|
||
return addr == base ? 1 : -1;
|
||
}
|
||
|
||
|
||
const struct host_hooks host_hooks = HOST_HOOKS_INITIALIZER;
|