diff options
Diffstat (limited to 'winsup/cygwin/fhandler_mem.cc')
| -rw-r--r-- | winsup/cygwin/fhandler_mem.cc | 45 |
1 files changed, 43 insertions, 2 deletions
diff --git a/winsup/cygwin/fhandler_mem.cc b/winsup/cygwin/fhandler_mem.cc index 9c41dda0b..81bfdc66b 100644 --- a/winsup/cygwin/fhandler_mem.cc +++ b/winsup/cygwin/fhandler_mem.cc @@ -94,7 +94,9 @@ fhandler_dev_mem::open (const char *, int flags, mode_t) RtlInitUnicodeString (&memstr, L"\\device\\physicalmemory"); OBJECT_ATTRIBUTES attr; - InitializeObjectAttributes(&attr, &memstr, OBJ_CASE_INSENSITIVE, NULL, NULL); + InitializeObjectAttributes(&attr, &memstr, + OBJ_CASE_INSENSITIVE | OBJ_INHERIT, + NULL, NULL); ACCESS_MASK section_access; if ((flags & (O_RDONLY | O_WRONLY | O_RDWR)) == O_RDONLY) @@ -277,7 +279,9 @@ fhandler_dev_mem::mmap (caddr_t *addr, size_t len, DWORD access, RtlInitUnicodeString (&memstr, L"\\device\\physicalmemory"); OBJECT_ATTRIBUTES attr; - InitializeObjectAttributes(&attr, &memstr, OBJ_CASE_INSENSITIVE, NULL, NULL); + InitializeObjectAttributes(&attr, &memstr, + OBJ_CASE_INSENSITIVE | OBJ_INHERIT, + NULL, NULL); ACCESS_MASK section_access; ULONG protect; @@ -359,6 +363,43 @@ 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 stat *buf) { |