projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 3cf50fcd | 1 | /* NetBSD host-specific hook definitions. |
| aeee4812 | 2 | Copyright (C) 2004-2023 Free Software Foundation, Inc. |
| 3cf50fcd MR |
3 | |
| 4 | This file is part of GCC. | |
| 5 | ||
| 6 | GCC is free software; you can redistribute it and/or modify it | |
| 7 | under the terms of the GNU General Public License as published | |
| 8 | by the Free Software Foundation; either version 3, or (at your | |
| 9 | option) any later version. | |
| 10 | ||
| 11 | GCC is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
| 13 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
| 14 | License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU General Public License | |
| 17 | along with GCC; see the file COPYING3. If not see | |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| 19 | ||
| 20 | #include "config.h" | |
| 21 | #include "system.h" | |
| 22 | #include "coretypes.h" | |
| 23 | #include "hosthooks.h" | |
| 24 | #include "hosthooks-def.h" | |
| 25 | ||
| 26 | ||
| 27 | #undef HOST_HOOKS_GT_PCH_GET_ADDRESS | |
| 28 | #define HOST_HOOKS_GT_PCH_GET_ADDRESS netbsd_gt_pch_get_address | |
| 29 | #undef HOST_HOOKS_GT_PCH_USE_ADDRESS | |
| 30 | #define HOST_HOOKS_GT_PCH_USE_ADDRESS netbsd_gt_pch_use_address | |
| 31 | ||
| 32 | /* For various ports, try to guess a fixed spot in the vm space | |
| 33 | that's probably free. */ | |
| 34 | #if defined(__sparc64__) | |
| 35 | # define TRY_EMPTY_VM_SPACE 0x40000000000 | |
| 36 | #elif defined(_LP64) | |
| 37 | # define TRY_EMPTY_VM_SPACE 0x400000000000 | |
| 38 | #elif defined(__mips__) || defined(__vax__) || defined (__arm__) | |
| 39 | # define TRY_EMPTY_VM_SPACE 0x60000000 | |
| 40 | #else | |
| 41 | # define TRY_EMPTY_VM_SPACE 0xb0000000 | |
| 42 | #endif | |
| 43 | ||
| 44 | /* Determine a location where we might be able to reliably allocate | |
| 45 | SIZE bytes. FD is the PCH file, though we should return with the | |
| 46 | file unmapped. */ | |
| 47 | ||
| 48 | static void * | |
| 49 | netbsd_gt_pch_get_address (size_t size, int fd) | |
| 50 | { | |
| 51 | void *addr; | |
| 52 | ||
| 53 | addr = mmap ((void *) TRY_EMPTY_VM_SPACE, size, PROT_READ | PROT_WRITE, | |
| 54 | MAP_PRIVATE | MAP_FIXED, fd, 0); | |
| 55 | ||
| 56 | /* If we failed the map, that means there's *no* free space. */ | |
| 57 | if (addr == (void *) MAP_FAILED) | |
| 58 | return NULL; | |
| 59 | /* Unmap the area before returning. */ | |
| 60 | munmap (addr, size); | |
| 61 | ||
| 62 | return addr; | |
| 63 | } | |
| 64 | ||
| 65 | /* Map SIZE bytes of FD+OFFSET at BASE. Return 1 if we succeeded at | |
| 66 | mapping the data at BASE, -1 if we couldn't. */ | |
| 67 | ||
| 68 | static int | |
| 747380f4 | 69 | netbsd_gt_pch_use_address (void *&base, size_t size, int fd, size_t offset) |
| 3cf50fcd MR |
70 | { |
| 71 | void *addr; | |
| 72 | ||
| 73 | /* We're called with size == 0 if we're not planning to load a PCH | |
| 74 | file at all. This allows the hook to free any static space that | |
| 75 | we might have allocated at link time. */ | |
| 76 | if (size == 0) | |
| 77 | return -1; | |
| 78 | ||
| 79 | addr = mmap (base, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, fd, offset); | |
| 80 | ||
| 81 | return addr == base ? 1 : -1; | |
| 82 | } | |
| 83 | ||
| 84 | ||
| 85 | const struct host_hooks host_hooks = HOST_HOOKS_INITIALIZER; |