diff options
Diffstat (limited to 'winsup/cygwin/fhandler_mem.cc')
| -rw-r--r-- | winsup/cygwin/fhandler_mem.cc | 257 |
1 files changed, 0 insertions, 257 deletions
diff --git a/winsup/cygwin/fhandler_mem.cc b/winsup/cygwin/fhandler_mem.cc deleted file mode 100644 index 6b3431bbb..000000000 --- a/winsup/cygwin/fhandler_mem.cc +++ /dev/null @@ -1,257 +0,0 @@ -/* fhandler_mem.cc. See fhandler.h for a description of the fhandler classes. - - Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2008, 2009, - 2010, 2011, 2012 Red Hat, Inc. - - This file is part of Cygwin. - - This software is a copyrighted work licensed under the terms of the - Cygwin license. Please consult the file "CYGWIN_LICENSE" for - details. */ - -#include "winsup.h" -#include <unistd.h> - -#include "cygerrno.h" -#include "path.h" -#include "fhandler.h" -#include "ntdll.h" - -/**********************************************************************/ -/* fhandler_dev_mem */ - -fhandler_dev_mem::fhandler_dev_mem () - : fhandler_base () -{ -} - -fhandler_dev_mem::~fhandler_dev_mem () -{ -} - -int -fhandler_dev_mem::open (int flags, mode_t) -{ - NTSTATUS status; - - if (!wincap.has_physical_mem_access ()) - { - set_errno (EACCES); - debug_printf ("%s is accessible under NT4/W2K/XP only", dev ().name); - return 0; - } - - if (dev () == FH_MEM) /* /dev/mem */ - { - SYSTEM_BASIC_INFORMATION sbi; - status = NtQuerySystemInformation (SystemBasicInformation, (PVOID) &sbi, - sizeof sbi, NULL); - if (NT_SUCCESS (status)) - { - __seterrno_from_nt_status (status); - debug_printf("NtQuerySystemInformation: status %p, %E", status); - mem_size = 0; - } - else - mem_size = sbi.PhysicalPageSize * sbi.NumberOfPhysicalPages; - debug_printf ("MemSize: %d MB", mem_size >> 20); - } - else if (dev () == FH_KMEM) /* /dev/kmem - Not yet supported */ - { - mem_size = 0; - debug_printf ("KMemSize: %d MB", mem_size >> 20); - } - else if (dev () == FH_PORT) /* /dev/port == First 64K of /dev/mem */ - { - mem_size = 65536; - debug_printf ("PortSize: 64 KB"); - } - else - { - mem_size = 0; - debug_printf ("Illegal minor number"); - } - - /* Check for illegal flags. */ - if (flags & (O_APPEND | O_TRUNC | O_EXCL)) - { - set_errno (EINVAL); - return 0; - } - - OBJECT_ATTRIBUTES attr; - InitializeObjectAttributes (&attr, &ro_u_pmem, - OBJ_CASE_INSENSITIVE - | (flags & O_CLOEXEC ? 0 : OBJ_INHERIT), - NULL, NULL); - - ACCESS_MASK section_access; - if ((flags & O_ACCMODE) == O_RDONLY) - { - set_access (GENERIC_READ); - section_access = SECTION_MAP_READ; - } - else if ((flags & O_ACCMODE) == O_WRONLY) - { - set_access (GENERIC_WRITE); - section_access = SECTION_MAP_READ | SECTION_MAP_WRITE; - } - else - { - set_access (GENERIC_READ | GENERIC_WRITE); - section_access = SECTION_MAP_READ | SECTION_MAP_WRITE; - } - - HANDLE mem; - status = NtOpenSection (&mem, section_access, &attr); - if (!NT_SUCCESS (status)) - { - __seterrno_from_nt_status (status); - set_io_handle (NULL); - return 0; - } - - set_io_handle (mem); - set_open_status (); - return 1; -} - -ssize_t __stdcall -fhandler_dev_mem::write (const void *ptr, size_t ulen) -{ - if (!ulen || pos >= mem_size) - return 0; - - if (!(get_access () & GENERIC_WRITE)) - { - set_errno (EINVAL); - return -1; - } - - if (pos + ulen > mem_size) - ulen = mem_size - pos; - - PHYSICAL_ADDRESS phys; - NTSTATUS status; - void *viewmem = NULL; - DWORD len = ulen + wincap.page_size () - 1; - - phys.QuadPart = (ULONGLONG) pos; - status = NtMapViewOfSection (get_handle (), INVALID_HANDLE_VALUE, &viewmem, - 0L, len, &phys, &len, ViewShare, 0, - PAGE_READONLY); - if (!NT_SUCCESS (status)) - { - __seterrno_from_nt_status (status); - return -1; - } - - memcpy ((char *) viewmem + (pos - phys.QuadPart), ptr, ulen); - - status = NtUnmapViewOfSection (INVALID_HANDLE_VALUE, viewmem); - if (!NT_SUCCESS (status)) - { - __seterrno_from_nt_status (status); - return -1; - } - - pos += ulen; - return ulen; -} - -void __stdcall -fhandler_dev_mem::read (void *ptr, size_t& ulen) -{ - if (!ulen || pos >= mem_size) - { - ulen = 0; - return; - } - - if (!(get_access () & GENERIC_READ)) - { - set_errno (EINVAL); - ulen = (size_t) -1; - return; - } - - if (pos + ulen > mem_size) - ulen = mem_size - pos; - - PHYSICAL_ADDRESS phys; - NTSTATUS status; - void *viewmem = NULL; - DWORD len = ulen + wincap.page_size () - 1; - - phys.QuadPart = (ULONGLONG) pos; - status = NtMapViewOfSection (get_handle (), INVALID_HANDLE_VALUE, &viewmem, - 0L, len, &phys, &len, ViewShare, 0, - PAGE_READONLY); - if (!NT_SUCCESS (status)) - { - __seterrno_from_nt_status (status); - ulen = (size_t) -1; - return; - } - - memcpy (ptr, (char *) viewmem + (pos - phys.QuadPart), ulen); - - status = NtUnmapViewOfSection (INVALID_HANDLE_VALUE, viewmem); - if (!NT_SUCCESS (status)) - { - __seterrno_from_nt_status (status); - ulen = (size_t) -1; - return; - } - - pos += ulen; -} - -_off64_t -fhandler_dev_mem::lseek (_off64_t offset, int whence) -{ - switch (whence) - { - case SEEK_SET: - pos = offset; - break; - - case SEEK_CUR: - pos += offset; - break; - - case SEEK_END: - pos = mem_size; - pos += offset; - break; - - default: - set_errno (EINVAL); - return ILLEGAL_SEEK; - } - - if (pos > mem_size) - { - set_errno (EINVAL); - return ILLEGAL_SEEK; - } - - return pos; -} - -int -fhandler_dev_mem::fstat (struct __stat64 *buf) -{ - fhandler_base::fstat (buf); - buf->st_blksize = wincap.page_size (); - if (is_auto_device ()) - { - buf->st_mode = S_IFCHR; - if (wincap.has_physical_mem_access ()) - buf->st_mode |= S_IRUSR | S_IWUSR | - S_IRGRP | S_IWGRP | - S_IROTH | S_IWOTH; - } - - return 0; -} |