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[/] [openrisc/] [tags/] [gnu-src/] [gcc-4.5.1/] [gcc-4.5.1-or32-1.0rc2/] [gcc/] [config/] [host-solaris.c] - Rev 492
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/* Solaris host-specific hook definitions. Copyright (C) 2004, 2007, 2008, 2010 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 <sys/mman.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 0x8000000000000000 #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;
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