diff options
Diffstat (limited to 'winsup/cygwin/fhandler_mem.cc')
| -rw-r--r-- | winsup/cygwin/fhandler_mem.cc | 284 |
1 files changed, 0 insertions, 284 deletions
diff --git a/winsup/cygwin/fhandler_mem.cc b/winsup/cygwin/fhandler_mem.cc deleted file mode 100644 index 24d681d4e..000000000 --- a/winsup/cygwin/fhandler_mem.cc +++ /dev/null @@ -1,284 +0,0 @@ -/* fhandler_mem.cc. See fhandler.h for a description of the fhandler classes. - - Copyright 2000, 2001, 2002, 2003, 2004, 2005 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 <sys/mman.h> -#include <ntdef.h> - -#include "cygerrno.h" -#include "security.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) -{ - if (!wincap.has_physical_mem_access ()) - { - set_errno (ENOENT); - debug_printf ("%s is accessible under NT/W2K only", dev ().name); - return 0; - } - - if (dev () == FH_MEM) /* /dev/mem */ - { - NTSTATUS ret; - SYSTEM_BASIC_INFORMATION sbi; - if ((ret = NtQuerySystemInformation (SystemBasicInformation, (PVOID) &sbi, - sizeof sbi, NULL)) != STATUS_SUCCESS) - { - __seterrno_from_nt_status (ret); - debug_printf("NtQuerySystemInformation: ret %d, Dos(ret) %E", ret); - 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; - } - - UNICODE_STRING memstr; - RtlInitUnicodeString (&memstr, L"\\device\\physicalmemory"); - - OBJECT_ATTRIBUTES attr; - InitializeObjectAttributes (&attr, &memstr, - OBJ_CASE_INSENSITIVE | 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; - NTSTATUS ret = NtOpenSection (&mem, section_access, &attr); - if (!NT_SUCCESS (ret)) - { - __seterrno_from_nt_status (ret); - set_io_handle (NULL); - return 0; - } - - set_io_handle (mem); - set_open_status (); - return 1; -} - -int -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 ret; - void *viewmem = NULL; - DWORD len = ulen + getsystempagesize () - 1; - - phys.QuadPart = (ULONGLONG) pos; - if ((ret = NtMapViewOfSection (get_handle (), - INVALID_HANDLE_VALUE, - &viewmem, - 0L, - len, - &phys, - &len, - ViewShare, - 0, - PAGE_READONLY)) != STATUS_SUCCESS) - { - __seterrno_from_nt_status (ret); - return -1; - } - - memcpy ((char *) viewmem + (pos - phys.QuadPart), ptr, ulen); - - if (!NT_SUCCESS (ret = NtUnmapViewOfSection (INVALID_HANDLE_VALUE, viewmem))) - { - __seterrno_from_nt_status (ret); - 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 ret; - void *viewmem = NULL; - DWORD len = ulen + getsystempagesize () - 1; - - phys.QuadPart = (ULONGLONG) pos; - if ((ret = NtMapViewOfSection (get_handle (), - INVALID_HANDLE_VALUE, - &viewmem, - 0L, - len, - &phys, - &len, - ViewShare, - 0, - PAGE_READONLY)) != STATUS_SUCCESS) - { - __seterrno_from_nt_status (ret); - ulen = (size_t) -1; - return; - } - - memcpy (ptr, (char *) viewmem + (pos - phys.QuadPart), ulen); - - if (!NT_SUCCESS (ret = NtUnmapViewOfSection (INVALID_HANDLE_VALUE, viewmem))) - { - __seterrno_from_nt_status (ret); - 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 = getsystempagesize (); - 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; -} - -int -fhandler_dev_mem::dup (fhandler_base *child) -{ - int ret = fhandler_base::dup (child); - - if (! ret) - { - fhandler_dev_mem *fhc = (fhandler_dev_mem *) child; - - fhc->mem_size = mem_size; - fhc->pos = pos; - } - return ret; -} |