diff options
Diffstat (limited to 'linkers/elftoolchain/libelf/mmap_win32.c')
| -rw-r--r-- | linkers/elftoolchain/libelf/mmap_win32.c | 247 |
1 files changed, 0 insertions, 247 deletions
diff --git a/linkers/elftoolchain/libelf/mmap_win32.c b/linkers/elftoolchain/libelf/mmap_win32.c deleted file mode 100644 index f801fc6..0000000 --- a/linkers/elftoolchain/libelf/mmap_win32.c +++ /dev/null @@ -1,247 +0,0 @@ -/*- - * Copyright (c) 2011 Chris Johns <chrisj@rtems.org> - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -/* - * Basic mmap/munmap set of functions that allows software that needs to use - * these functions to work without changing. Currently only the basic read - * has been tested. - * - * The basic was taken from the implementation in Python 3.x by Sam Rushing - * <rushing@nightmare.com>. - */ - -#ifndef __WIN32__ -#error "Wrong OS; only for WIN32" -#endif - -#include <errno.h> -#include <stdint.h> -#include <windows.h> - -/* - * Bring in the local mman.h header to make sure the interface is in sync. - */ -#include <sys/mman.h> - -/* - * The data for each map. Maintained as a list. If performance is important maybe - * some other container can be used. - */ -typedef struct mmap_data_s -{ - struct mmap_data_s* next; - void* data; - HANDLE file_handle; - HANDLE map_handle; - size_t size; - off_t offset; -} mmap_data; - -/* - * Head of the map list. - */ -static mmap_data* map_head; - -void* -mmap(void* addr, size_t len, int prot, int flags, int fd, off_t offset) -{ - mmap_data* map = NULL; - DWORD flProtect; - DWORD dwDesiredAccess; - HANDLE fh = 0; - DWORD dwErr = 0; - DWORD size_lo; - DWORD size_hi; - DWORD off_lo; - DWORD off_hi; - uint64_t size = 0; - - if ((fd == 0) || (fd == -1)) - return MAP_FAILED; - - /* - * Not implemented. Patches welcome. - */ - if (prot & PROT_EXEC) - return MAP_FAILED; - - /* - * Map the protection. - */ - if ((prot & PROT_READ) == PROT_READ) - { - flProtect = PAGE_READONLY; - dwDesiredAccess = FILE_MAP_READ; - } - if ((prot & PROT_WRITE) == PROT_WRITE) - { - flProtect = PAGE_WRITECOPY; - dwDesiredAccess = FILE_MAP_WRITE; - } - if ((prot & (PROT_READ | PROT_WRITE)) == (PROT_READ | PROT_WRITE)) - { - flProtect = PAGE_READWRITE; - dwDesiredAccess = FILE_MAP_WRITE; - } - - fh = (HANDLE) _get_osfhandle (fd); - if (fh == (HANDLE) -1) - return MAP_FAILED; - - /* - * Win9x appears to need us seeked to zero. - */ - lseek (fd, 0, SEEK_SET); - - /* - * Allocate the space to handle the mapping. - */ - map = malloc (sizeof (mmap_data)); - if (!map) - return MAP_FAILED; - - map->next = NULL; - map->data = NULL; - map->file_handle = fh; - map->map_handle = NULL; - map->offset = offset; - - if (len == 0) - { - DWORD low; - DWORD high; - - low = GetFileSize (fh, &high); - - /* - * Low might just happen to have the value INVALID_FILE_SIZE; so we need to - * check the last error also. - */ - if ((low == INVALID_FILE_SIZE) && (dwErr = GetLastError()) != NO_ERROR) - { - free (map); - return MAP_FAILED; - } - - size = (((uint64_t) high) << 32) + low; - - if (offset >= size) - { - free (map); - return MAP_FAILED; - } - - if (offset - size > (size_t) -1LL) - /* Map area too large to fit in memory */ - map->size = (size_t) -1; - else - map->size = (size_t) (size - offset); - } - else - { - map->size = len; - size = offset + len; - } - - size_hi = (DWORD)(size >> 32); - size_lo = (DWORD)(size & 0xFFFFFFFF); - off_hi = (DWORD)(0); - off_lo = (DWORD)(offset & 0xFFFFFFFF); - - /* - * For files, it would be sufficient to pass 0 as size. For anonymous maps, - * we have to pass the size explicitly. - */ - map->map_handle = CreateFileMapping (map->file_handle, - NULL, - flProtect, - size_hi, - size_lo, - NULL); - if (!map->map_handle) - { - free (map); - return MAP_FAILED; - } - - map->data = (char *) MapViewOfFileEx (map->map_handle, - dwDesiredAccess, - off_hi, - off_lo, - map->size, - addr); - if (!map->data) - { - CloseHandle (map->map_handle); - free (map); - return MAP_FAILED; - } - - /* - * Add to the list. - */ - map->next = map_head; - map_head = map; - - return map->data; -} - -int -munmap (void* addr, size_t len) -{ - mmap_data* map = map_head; - mmap_data** prev_next = &map_head; - - /* - * Find the map and remove from the list. - */ - while (map) - { - if (map->data == addr) - { - *prev_next = map->next; - break; - } - prev_next = &map->next; - map = map->next; - } - - if (!map) - { - errno = EINVAL; - return -1; - } - - if (map->data != NULL) - UnmapViewOfFile (map->data); - if (map->map_handle != NULL) - CloseHandle (map->map_handle); - - free (map); - - errno = 0; - return 0; -} |