/***********************************************************************
* add_fd_to_cache
*
* Caller must hold fd_cache_section.
*/
static int add_fd_to_cache( HANDLE handle, int fd, enum server_fd_type type,
unsigned int access, unsigned int options )
{
unsigned int entry, idx = handle_to_index( handle, &entry );
int prev_fd;
if (entry >= FD_CACHE_ENTRIES)
{
FIXME( "too many allocated handles, not caching %p\n", handle );
return 0;
}
if (!fd_cache[entry]) /* do we need to allocate a new block of entries? */
{
if (!entry) fd_cache[0] = fd_cache_initial_block;
else
{
void *ptr = wine_anon_mmap( NULL, FD_CACHE_BLOCK_SIZE * sizeof(struct fd_cache_entry),
PROT_READ | PROT_WRITE, 0 );
if (ptr == MAP_FAILED) return 0;
fd_cache[entry] = ptr;
}
}
/* store fd+1 so that 0 can be used as the unset value */
prev_fd = interlocked_xchg( &fd_cache[entry][idx].fd, fd + 1 ) - 1;
fd_cache[entry][idx].type = type;
fd_cache[entry][idx].access = access;
fd_cache[entry][idx].options = options;
if (prev_fd != -1) close( prev_fd );
return 1;
}
static inline void reserve_area( void *addr, size_t size )
{
wine_anon_mmap( addr, size, PROT_NONE, MAP_FIXED | MAP_NORESERVE );
wine_mmap_add_reserved_area( addr, size );
}
/* map a builtin dll in memory and fixup RVAs */
static void *map_dll( const IMAGE_NT_HEADERS *nt_descr )
{
#ifdef HAVE_MMAP
IMAGE_DATA_DIRECTORY *dir;
IMAGE_DOS_HEADER *dos;
IMAGE_NT_HEADERS *nt;
IMAGE_SECTION_HEADER *sec;
BYTE *addr;
DWORD code_start, data_start, data_end;
const size_t page_size = getpagesize();
const size_t page_mask = page_size - 1;
int delta, nb_sections = 2; /* code + data */
unsigned int i;
size_t size = (sizeof(IMAGE_DOS_HEADER)
+ sizeof(IMAGE_NT_HEADERS)
+ nb_sections * sizeof(IMAGE_SECTION_HEADER));
assert( size <= page_size );
/* module address must be aligned on 64K boundary */
addr = (BYTE *)((nt_descr->OptionalHeader.ImageBase + 0xffff) & ~0xffff);
if (wine_anon_mmap( addr, page_size, PROT_READ|PROT_WRITE, MAP_FIXED ) != addr) return NULL;
dos = (IMAGE_DOS_HEADER *)addr;
nt = (IMAGE_NT_HEADERS *)(dos + 1);
sec = (IMAGE_SECTION_HEADER *)(nt + 1);
/* Build the DOS and NT headers */
dos->e_magic = IMAGE_DOS_SIGNATURE;
dos->e_cblp = 0x90;
dos->e_cp = 3;
dos->e_cparhdr = (sizeof(*dos)+0xf)/0x10;
dos->e_minalloc = 0;
dos->e_maxalloc = 0xffff;
dos->e_ss = 0x0000;
dos->e_sp = 0x00b8;
dos->e_lfarlc = sizeof(*dos);
dos->e_lfanew = sizeof(*dos);
*nt = *nt_descr;
delta = (const BYTE *)nt_descr - addr;
code_start = page_size;
data_start = delta & ~page_mask;
data_end = (nt->OptionalHeader.SizeOfImage + delta + page_mask) & ~page_mask;
fixup_rva_ptrs( &nt->OptionalHeader.AddressOfEntryPoint, addr, 1 );
nt->FileHeader.NumberOfSections = nb_sections;
nt->OptionalHeader.BaseOfCode = code_start;
#ifndef _WIN64
nt->OptionalHeader.BaseOfData = data_start;
#endif
nt->OptionalHeader.SizeOfCode = data_start - code_start;
nt->OptionalHeader.SizeOfInitializedData = data_end - data_start;
nt->OptionalHeader.SizeOfUninitializedData = 0;
nt->OptionalHeader.SizeOfImage = data_end;
nt->OptionalHeader.ImageBase = (ULONG_PTR)addr;
/* Build the code section */
memcpy( sec->Name, ".text", sizeof(".text") );
sec->SizeOfRawData = data_start - code_start;
sec->Misc.VirtualSize = sec->SizeOfRawData;
sec->VirtualAddress = code_start;
sec->PointerToRawData = code_start;
sec->Characteristics = (IMAGE_SCN_CNT_CODE | IMAGE_SCN_MEM_EXECUTE | IMAGE_SCN_MEM_READ);
sec++;
/* Build the data section */
memcpy( sec->Name, ".data", sizeof(".data") );
sec->SizeOfRawData = data_end - data_start;
sec->Misc.VirtualSize = sec->SizeOfRawData;
sec->VirtualAddress = data_start;
sec->PointerToRawData = data_start;
sec->Characteristics = (IMAGE_SCN_CNT_INITIALIZED_DATA |
IMAGE_SCN_MEM_WRITE | IMAGE_SCN_MEM_READ);
sec++;
for (i = 0; i < nt->OptionalHeader.NumberOfRvaAndSizes; i++)
fixup_rva_dwords( &nt->OptionalHeader.DataDirectory[i].VirtualAddress, delta, 1 );
/* Build the import directory */
dir = &nt->OptionalHeader.DataDirectory[IMAGE_FILE_IMPORT_DIRECTORY];
if (dir->Size)
{
IMAGE_IMPORT_DESCRIPTOR *imports = (void *)(addr + dir->VirtualAddress);
fixup_imports( imports, addr, delta );
}
/* Build the resource directory */
dir = &nt->OptionalHeader.DataDirectory[IMAGE_FILE_RESOURCE_DIRECTORY];
if (dir->Size)
{
void *ptr = (void *)(addr + dir->VirtualAddress);
fixup_resources( ptr, ptr, delta );
}
/* Build the export directory */
dir = &nt->OptionalHeader.DataDirectory[IMAGE_FILE_EXPORT_DIRECTORY];
if (dir->Size)
{
IMAGE_EXPORT_DIRECTORY *exports = (void *)(addr + dir->VirtualAddress);
fixup_exports( exports, addr, delta );
}
return addr;
#else /* HAVE_MMAP */
return NULL;
#endif /* HAVE_MMAP */
}
