diff options
Diffstat (limited to 'winsup/cygwin/fhandler_mem.cc')
| -rw-r--r-- | winsup/cygwin/fhandler_mem.cc | 436 |
1 files changed, 0 insertions, 436 deletions
diff --git a/winsup/cygwin/fhandler_mem.cc b/winsup/cygwin/fhandler_mem.cc deleted file mode 100644 index 177e645c0..000000000 --- a/winsup/cygwin/fhandler_mem.cc +++ /dev/null @@ -1,436 +0,0 @@ -/* fhandler_mem.cc. See fhandler.h for a description of the fhandler classes. - - Copyright 2000, 2001, 2002 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 <errno.h> -#include <unistd.h> -#include <sys/mman.h> -#include <ntdef.h> - -#include "cygerrno.h" -#include "security.h" -#include "fhandler.h" -#include "ntdll.h" - -/**********************************************************************/ -/* fhandler_dev_mem */ - -fhandler_dev_mem::fhandler_dev_mem (int nunit) - : fhandler_base (FH_MEM), unit (nunit) -{ - /* Reading physical memory only supported on NT/W2K. */ - if (!wincap.has_physical_mem_access ()) - { - mem_size = 0; - return; - } - - if (unit == 1) /* /dev/mem */ - { - NTSTATUS ret; - SYSTEM_BASIC_INFORMATION sbi; - if ((ret = NtQuerySystemInformation (SystemBasicInformation, (PVOID) &sbi, - sizeof sbi, NULL)) != STATUS_SUCCESS) - { - __seterrno_from_win_error (RtlNtStatusToDosError (ret)); - debug_printf("NtQuerySystemInformation: ret = %d, Dos(ret) = %d", - ret, RtlNtStatusToDosError (ret)); - mem_size = 0; - } - else - mem_size = sbi.PhysicalPageSize * sbi.NumberOfPhysicalPages; - debug_printf ("MemSize: %d MB", mem_size >> 20); - } - else if (unit == 2) /* /dev/kmem - Not yet supported */ - { - mem_size = 0; - debug_printf ("KMemSize: %d MB", mem_size >> 20); - } - else if (unit == 4) /* /dev/port == First 64K of /dev/mem */ - { - mem_size = 65536; - debug_printf ("PortSize: 64 KB"); - } - else - { - mem_size = 0; - debug_printf ("Illegal minor number!!!"); - } -} - -fhandler_dev_mem::~fhandler_dev_mem (void) -{ -} - -int -fhandler_dev_mem::open (path_conv *, int flags, mode_t) -{ - if (!wincap.has_physical_mem_access ()) - { - set_errno (ENOENT); - debug_printf ("%s is accessible under NT/W2K only", - unit == 1 ? "/dev/mem" : - unit == 2 ? "/dev/kmem" : - "/dev/port"); - return 0; - } - - /* 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_RDONLY | O_WRONLY | O_RDWR)) == O_RDONLY) - { - set_access (GENERIC_READ); - section_access = SECTION_MAP_READ; - } - else if ((flags & (O_RDONLY | O_WRONLY | O_RDWR)) == 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_win_error (RtlNtStatusToDosError (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 + getpagesize () - 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_win_error (RtlNtStatusToDosError (ret)); - return -1; - } - - memcpy ((char *) viewmem + (pos - phys.QuadPart), ptr, ulen); - - if (!NT_SUCCESS (ret = NtUnmapViewOfSection (INVALID_HANDLE_VALUE, viewmem))) - { - __seterrno_from_win_error (RtlNtStatusToDosError (ret)); - return -1; - } - - pos += ulen; - return ulen; -} - -int __stdcall -fhandler_dev_mem::read (void *ptr, size_t ulen) -{ - if (!ulen || pos >= mem_size) - return 0; - - if (!(get_access () & GENERIC_READ)) - { - 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 + getpagesize () - 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_win_error (RtlNtStatusToDosError (ret)); - return -1; - } - - memcpy (ptr, (char *) viewmem + (pos - phys.QuadPart), ulen); - - if (!NT_SUCCESS (ret = NtUnmapViewOfSection (INVALID_HANDLE_VALUE, viewmem))) - { - __seterrno_from_win_error (RtlNtStatusToDosError (ret)); - return -1; - } - - pos += ulen; - return ulen; -} - -int -fhandler_dev_mem::close (void) -{ - return fhandler_base::close (); -} - -__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; -} - -HANDLE -fhandler_dev_mem::mmap (caddr_t *addr, size_t len, DWORD access, - int flags, __off64_t off) -{ - if (off >= mem_size - || (DWORD) len >= mem_size - || off + len >= mem_size) - { - set_errno (EINVAL); - syscall_printf ("-1 = mmap(): illegal parameter, set EINVAL"); - return INVALID_HANDLE_VALUE; - } - - 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; - ULONG protect; - - if (access & FILE_MAP_COPY) - { - section_access = SECTION_MAP_READ | SECTION_MAP_WRITE; - protect = PAGE_WRITECOPY; - } - else if (access & FILE_MAP_WRITE) - { - section_access = SECTION_MAP_READ | SECTION_MAP_WRITE; - protect = PAGE_READWRITE; - } - else - { - section_access = SECTION_MAP_READ; - protect = PAGE_READONLY; - } - - HANDLE h; - NTSTATUS ret = NtOpenSection (&h, section_access, &attr); - if (!NT_SUCCESS (ret)) - { - __seterrno_from_win_error (RtlNtStatusToDosError (ret)); - syscall_printf ("-1 = mmap(): NtOpenSection failed with %E"); - return INVALID_HANDLE_VALUE; - } - - PHYSICAL_ADDRESS phys; - void *base = *addr; - DWORD dlen = len; - - phys.QuadPart = (ULONGLONG) off; - - if ((ret = NtMapViewOfSection (h, - INVALID_HANDLE_VALUE, - &base, - 0L, - dlen, - &phys, - &dlen, - ViewShare /*??*/, - 0, - protect)) != STATUS_SUCCESS) - { - __seterrno_from_win_error (RtlNtStatusToDosError (ret)); - syscall_printf ("-1 = mmap(): NtMapViewOfSection failed with %E"); - return INVALID_HANDLE_VALUE; - } - if ((flags & MAP_FIXED) && base != *addr) - { - set_errno (EINVAL); - syscall_printf ("-1 = mmap(): address shift with MAP_FIXED given"); - NtUnmapViewOfSection (INVALID_HANDLE_VALUE, base); - return INVALID_HANDLE_VALUE; - } - - *addr = (caddr_t) base; - return h; -} - -int -fhandler_dev_mem::munmap (HANDLE h, caddr_t addr, size_t len) -{ - NTSTATUS ret; - if (!NT_SUCCESS (ret = NtUnmapViewOfSection (INVALID_HANDLE_VALUE, addr))) - { - __seterrno_from_win_error (RtlNtStatusToDosError (ret)); - return -1; - } - CloseHandle (h); - return 0; -} - -int -fhandler_dev_mem::msync (HANDLE h, caddr_t addr, size_t len, int flags) -{ - return 0; -} - -BOOL -fhandler_dev_mem::fixup_mmap_after_fork (HANDLE h, DWORD access, DWORD offset, - DWORD size, void *address) -{ - DWORD ret; - PHYSICAL_ADDRESS phys; - void *base = address; - DWORD dlen = size; - ULONG protect; - - if (access & FILE_MAP_COPY) - protect = PAGE_WRITECOPY; - else if (access & FILE_MAP_WRITE) - protect = PAGE_READWRITE; - else - protect = PAGE_READONLY; - - phys.QuadPart = (ULONGLONG) offset; - - if ((ret = NtMapViewOfSection (h, - INVALID_HANDLE_VALUE, - &base, - 0L, - dlen, - &phys, - &dlen, - ViewShare /*??*/, - 0, - protect)) != STATUS_SUCCESS) - { - __seterrno_from_win_error (RtlNtStatusToDosError (ret)); - syscall_printf ("-1 = fixup_mmap_after_fork(): NtMapViewOfSection failed with %E"); - return FALSE; - } - return base == address; -} - -int -fhandler_dev_mem::fstat (struct __stat64 *buf, path_conv *pc) -{ - this->fhandler_base::fstat (buf, pc); - 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; - buf->st_blksize = getpagesize (); - - 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; -} - -void -fhandler_dev_mem::dump () -{ - paranoid_printf ("here, fhandler_dev_mem"); -} |