956 lines
33 KiB
C
956 lines
33 KiB
C
/*
|
|
* Server-side file mapping management
|
|
*
|
|
* Copyright (C) 1999 Alexandre Julliard
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "wine/port.h"
|
|
|
|
#include <assert.h>
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/stat.h>
|
|
#ifdef HAVE_SYS_MMAN_H
|
|
# include <sys/mman.h>
|
|
#endif
|
|
#include <unistd.h>
|
|
|
|
#include "ntstatus.h"
|
|
#define WIN32_NO_STATUS
|
|
#include "windef.h"
|
|
#include "winternl.h"
|
|
|
|
#include "file.h"
|
|
#include "handle.h"
|
|
#include "thread.h"
|
|
#include "process.h"
|
|
#include "request.h"
|
|
#include "security.h"
|
|
|
|
/* list of memory ranges, used to store committed info */
|
|
struct ranges
|
|
{
|
|
struct object obj; /* object header */
|
|
unsigned int count; /* number of used ranges */
|
|
unsigned int max; /* number of allocated ranges */
|
|
struct range
|
|
{
|
|
file_pos_t start;
|
|
file_pos_t end;
|
|
} *ranges;
|
|
};
|
|
|
|
static void ranges_dump( struct object *obj, int verbose );
|
|
static void ranges_destroy( struct object *obj );
|
|
|
|
static const struct object_ops ranges_ops =
|
|
{
|
|
sizeof(struct ranges), /* size */
|
|
ranges_dump, /* dump */
|
|
no_get_type, /* get_type */
|
|
no_add_queue, /* add_queue */
|
|
NULL, /* remove_queue */
|
|
NULL, /* signaled */
|
|
NULL, /* satisfied */
|
|
no_signal, /* signal */
|
|
no_get_fd, /* get_fd */
|
|
no_map_access, /* map_access */
|
|
default_get_sd, /* get_sd */
|
|
default_set_sd, /* set_sd */
|
|
no_lookup_name, /* lookup_name */
|
|
no_link_name, /* link_name */
|
|
NULL, /* unlink_name */
|
|
no_open_file, /* open_file */
|
|
no_close_handle, /* close_handle */
|
|
ranges_destroy /* destroy */
|
|
};
|
|
|
|
/* memory view mapped in client address space */
|
|
struct memory_view
|
|
{
|
|
struct list entry; /* entry in per-process view list */
|
|
struct fd *fd; /* fd for mapped file */
|
|
struct ranges *committed; /* list of committed ranges in this mapping */
|
|
unsigned int flags; /* SEC_* flags */
|
|
client_ptr_t base; /* view base address (in process addr space) */
|
|
mem_size_t size; /* view size */
|
|
file_pos_t start; /* start offset in mapping */
|
|
};
|
|
|
|
struct mapping
|
|
{
|
|
struct object obj; /* object header */
|
|
mem_size_t size; /* mapping size */
|
|
unsigned int flags; /* SEC_* flags */
|
|
struct fd *fd; /* fd for mapped file */
|
|
enum cpu_type cpu; /* client CPU (for PE image mapping) */
|
|
pe_image_info_t image; /* image info (for PE image mapping) */
|
|
struct ranges *committed; /* list of committed ranges in this mapping */
|
|
struct file *shared_file; /* temp file for shared PE mapping */
|
|
struct list shared_entry; /* entry in global shared PE mappings list */
|
|
};
|
|
|
|
static void mapping_dump( struct object *obj, int verbose );
|
|
static struct object_type *mapping_get_type( struct object *obj );
|
|
static struct fd *mapping_get_fd( struct object *obj );
|
|
static unsigned int mapping_map_access( struct object *obj, unsigned int access );
|
|
static void mapping_destroy( struct object *obj );
|
|
static enum server_fd_type mapping_get_fd_type( struct fd *fd );
|
|
|
|
static const struct object_ops mapping_ops =
|
|
{
|
|
sizeof(struct mapping), /* size */
|
|
mapping_dump, /* dump */
|
|
mapping_get_type, /* get_type */
|
|
no_add_queue, /* add_queue */
|
|
NULL, /* remove_queue */
|
|
NULL, /* signaled */
|
|
NULL, /* satisfied */
|
|
no_signal, /* signal */
|
|
mapping_get_fd, /* get_fd */
|
|
mapping_map_access, /* map_access */
|
|
default_get_sd, /* get_sd */
|
|
default_set_sd, /* set_sd */
|
|
no_lookup_name, /* lookup_name */
|
|
directory_link_name, /* link_name */
|
|
default_unlink_name, /* unlink_name */
|
|
no_open_file, /* open_file */
|
|
fd_close_handle, /* close_handle */
|
|
mapping_destroy /* destroy */
|
|
};
|
|
|
|
static const struct fd_ops mapping_fd_ops =
|
|
{
|
|
default_fd_get_poll_events, /* get_poll_events */
|
|
default_poll_event, /* poll_event */
|
|
mapping_get_fd_type, /* get_fd_type */
|
|
no_fd_read, /* read */
|
|
no_fd_write, /* write */
|
|
no_fd_flush, /* flush */
|
|
no_fd_get_volume_info, /* get_volume_info */
|
|
no_fd_ioctl, /* ioctl */
|
|
no_fd_queue_async, /* queue_async */
|
|
default_fd_reselect_async /* reselect_async */
|
|
};
|
|
|
|
static struct list shared_list = LIST_INIT(shared_list);
|
|
|
|
static size_t page_mask;
|
|
|
|
#define ROUND_SIZE(size) (((size) + page_mask) & ~page_mask)
|
|
|
|
|
|
static void ranges_dump( struct object *obj, int verbose )
|
|
{
|
|
struct ranges *ranges = (struct ranges *)obj;
|
|
fprintf( stderr, "Memory ranges count=%u\n", ranges->count );
|
|
}
|
|
|
|
static void ranges_destroy( struct object *obj )
|
|
{
|
|
struct ranges *ranges = (struct ranges *)obj;
|
|
free( ranges->ranges );
|
|
}
|
|
|
|
/* extend a file beyond the current end of file */
|
|
static int grow_file( int unix_fd, file_pos_t new_size )
|
|
{
|
|
static const char zero;
|
|
off_t size = new_size;
|
|
|
|
if (sizeof(new_size) > sizeof(size) && size != new_size)
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
return 0;
|
|
}
|
|
/* extend the file one byte beyond the requested size and then truncate it */
|
|
/* this should work around ftruncate implementations that can't extend files */
|
|
if (pwrite( unix_fd, &zero, 1, size ) != -1)
|
|
{
|
|
ftruncate( unix_fd, size );
|
|
return 1;
|
|
}
|
|
file_set_error();
|
|
return 0;
|
|
}
|
|
|
|
/* check if the current directory allows exec mappings */
|
|
static int check_current_dir_for_exec(void)
|
|
{
|
|
int fd;
|
|
char tmpfn[] = "anonmap.XXXXXX";
|
|
void *ret = MAP_FAILED;
|
|
|
|
fd = mkstemps( tmpfn, 0 );
|
|
if (fd == -1) return 0;
|
|
if (grow_file( fd, 1 ))
|
|
{
|
|
ret = mmap( NULL, get_page_size(), PROT_READ | PROT_EXEC, MAP_PRIVATE, fd, 0 );
|
|
if (ret != MAP_FAILED) munmap( ret, get_page_size() );
|
|
}
|
|
close( fd );
|
|
unlink( tmpfn );
|
|
return (ret != MAP_FAILED);
|
|
}
|
|
|
|
/* create a temp file for anonymous mappings */
|
|
static int create_temp_file( file_pos_t size )
|
|
{
|
|
static int temp_dir_fd = -1;
|
|
char tmpfn[] = "anonmap.XXXXXX";
|
|
int fd;
|
|
|
|
if (temp_dir_fd == -1)
|
|
{
|
|
temp_dir_fd = server_dir_fd;
|
|
if (!check_current_dir_for_exec())
|
|
{
|
|
/* the server dir is noexec, try the config dir instead */
|
|
fchdir( config_dir_fd );
|
|
if (check_current_dir_for_exec())
|
|
temp_dir_fd = config_dir_fd;
|
|
else /* neither works, fall back to server dir */
|
|
fchdir( server_dir_fd );
|
|
}
|
|
}
|
|
else if (temp_dir_fd != server_dir_fd) fchdir( temp_dir_fd );
|
|
|
|
fd = mkstemps( tmpfn, 0 );
|
|
if (fd != -1)
|
|
{
|
|
if (!grow_file( fd, size ))
|
|
{
|
|
close( fd );
|
|
fd = -1;
|
|
}
|
|
unlink( tmpfn );
|
|
}
|
|
else file_set_error();
|
|
|
|
if (temp_dir_fd != server_dir_fd) fchdir( server_dir_fd );
|
|
return fd;
|
|
}
|
|
|
|
/* find a memory view from its base address */
|
|
static struct memory_view *find_mapped_view( struct process *process, client_ptr_t base )
|
|
{
|
|
struct memory_view *view;
|
|
|
|
LIST_FOR_EACH_ENTRY( view, &process->views, struct memory_view, entry )
|
|
if (view->base == base) return view;
|
|
|
|
set_error( STATUS_NOT_MAPPED_VIEW );
|
|
return NULL;
|
|
}
|
|
|
|
static void free_memory_view( struct memory_view *view )
|
|
{
|
|
if (view->fd) release_object( view->fd );
|
|
if (view->committed) release_object( view->committed );
|
|
list_remove( &view->entry );
|
|
free( view );
|
|
}
|
|
|
|
/* free all mapped views at process exit */
|
|
void free_mapped_views( struct process *process )
|
|
{
|
|
struct list *ptr;
|
|
|
|
while ((ptr = list_head( &process->views )))
|
|
free_memory_view( LIST_ENTRY( ptr, struct memory_view, entry ));
|
|
}
|
|
|
|
/* find the shared PE mapping for a given mapping */
|
|
static struct file *get_shared_file( struct mapping *mapping )
|
|
{
|
|
struct mapping *ptr;
|
|
|
|
LIST_FOR_EACH_ENTRY( ptr, &shared_list, struct mapping, shared_entry )
|
|
if (is_same_file_fd( ptr->fd, mapping->fd ))
|
|
return (struct file *)grab_object( ptr->shared_file );
|
|
return NULL;
|
|
}
|
|
|
|
/* return the size of the memory mapping and file range of a given section */
|
|
static inline void get_section_sizes( const IMAGE_SECTION_HEADER *sec, size_t *map_size,
|
|
off_t *file_start, size_t *file_size )
|
|
{
|
|
static const unsigned int sector_align = 0x1ff;
|
|
|
|
if (!sec->Misc.VirtualSize) *map_size = ROUND_SIZE( sec->SizeOfRawData );
|
|
else *map_size = ROUND_SIZE( sec->Misc.VirtualSize );
|
|
|
|
*file_start = sec->PointerToRawData & ~sector_align;
|
|
*file_size = (sec->SizeOfRawData + (sec->PointerToRawData & sector_align) + sector_align) & ~sector_align;
|
|
if (*file_size > *map_size) *file_size = *map_size;
|
|
}
|
|
|
|
/* add a range to the committed list */
|
|
static void add_committed_range( struct memory_view *view, file_pos_t start, file_pos_t end )
|
|
{
|
|
unsigned int i, j;
|
|
struct ranges *committed = view->committed;
|
|
struct range *ranges;
|
|
|
|
if ((start & page_mask) || (end & page_mask) ||
|
|
start >= view->size || end >= view->size ||
|
|
start >= end)
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
return;
|
|
}
|
|
|
|
if (!committed) return; /* everything committed already */
|
|
|
|
start += view->start;
|
|
end += view->start;
|
|
|
|
for (i = 0, ranges = committed->ranges; i < committed->count; i++)
|
|
{
|
|
if (ranges[i].start > end) break;
|
|
if (ranges[i].end < start) continue;
|
|
if (ranges[i].start > start) ranges[i].start = start; /* extend downwards */
|
|
if (ranges[i].end < end) /* extend upwards and maybe merge with next */
|
|
{
|
|
for (j = i + 1; j < committed->count; j++)
|
|
{
|
|
if (ranges[j].start > end) break;
|
|
if (ranges[j].end > end) end = ranges[j].end;
|
|
}
|
|
if (j > i + 1)
|
|
{
|
|
memmove( &ranges[i + 1], &ranges[j], (committed->count - j) * sizeof(*ranges) );
|
|
committed->count -= j - (i + 1);
|
|
}
|
|
ranges[i].end = end;
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* now add a new range */
|
|
|
|
if (committed->count == committed->max)
|
|
{
|
|
unsigned int new_size = committed->max * 2;
|
|
struct range *new_ptr = realloc( committed->ranges, new_size * sizeof(*new_ptr) );
|
|
if (!new_ptr) return;
|
|
committed->max = new_size;
|
|
committed->ranges = new_ptr;
|
|
}
|
|
memmove( &ranges[i + 1], &ranges[i], (committed->count - i) * sizeof(*ranges) );
|
|
ranges[i].start = start;
|
|
ranges[i].end = end;
|
|
committed->count++;
|
|
}
|
|
|
|
/* find the range containing start and return whether it's committed */
|
|
static int find_committed_range( struct memory_view *view, file_pos_t start, mem_size_t *size )
|
|
{
|
|
unsigned int i;
|
|
struct ranges *committed = view->committed;
|
|
struct range *ranges;
|
|
|
|
if ((start & page_mask) || start >= view->size)
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
return 0;
|
|
}
|
|
if (!committed) /* everything is committed */
|
|
{
|
|
*size = view->size - start;
|
|
return 1;
|
|
}
|
|
for (i = 0, ranges = committed->ranges; i < committed->count; i++)
|
|
{
|
|
if (ranges[i].start > view->start + start)
|
|
{
|
|
*size = min( ranges[i].start, view->start + view->size ) - (view->start + start);
|
|
return 0;
|
|
}
|
|
if (ranges[i].end > view->start + start)
|
|
{
|
|
*size = min( ranges[i].end, view->start + view->size ) - (view->start + start);
|
|
return 1;
|
|
}
|
|
}
|
|
*size = view->size - start;
|
|
return 0;
|
|
}
|
|
|
|
/* allocate and fill the temp file for a shared PE image mapping */
|
|
static int build_shared_mapping( struct mapping *mapping, int fd,
|
|
IMAGE_SECTION_HEADER *sec, unsigned int nb_sec )
|
|
{
|
|
unsigned int i;
|
|
mem_size_t total_size;
|
|
size_t file_size, map_size, max_size;
|
|
off_t shared_pos, read_pos, write_pos;
|
|
char *buffer = NULL;
|
|
int shared_fd;
|
|
long toread;
|
|
|
|
/* compute the total size of the shared mapping */
|
|
|
|
total_size = max_size = 0;
|
|
for (i = 0; i < nb_sec; i++)
|
|
{
|
|
if ((sec[i].Characteristics & IMAGE_SCN_MEM_SHARED) &&
|
|
(sec[i].Characteristics & IMAGE_SCN_MEM_WRITE))
|
|
{
|
|
get_section_sizes( &sec[i], &map_size, &read_pos, &file_size );
|
|
if (file_size > max_size) max_size = file_size;
|
|
total_size += map_size;
|
|
}
|
|
}
|
|
if (!total_size) return 1; /* nothing to do */
|
|
|
|
if ((mapping->shared_file = get_shared_file( mapping ))) return 1;
|
|
|
|
/* create a temp file for the mapping */
|
|
|
|
if ((shared_fd = create_temp_file( total_size )) == -1) return 0;
|
|
if (!(mapping->shared_file = create_file_for_fd( shared_fd, FILE_GENERIC_READ|FILE_GENERIC_WRITE, 0 )))
|
|
return 0;
|
|
|
|
if (!(buffer = malloc( max_size ))) goto error;
|
|
|
|
/* copy the shared sections data into the temp file */
|
|
|
|
shared_pos = 0;
|
|
for (i = 0; i < nb_sec; i++)
|
|
{
|
|
if (!(sec[i].Characteristics & IMAGE_SCN_MEM_SHARED)) continue;
|
|
if (!(sec[i].Characteristics & IMAGE_SCN_MEM_WRITE)) continue;
|
|
get_section_sizes( &sec[i], &map_size, &read_pos, &file_size );
|
|
write_pos = shared_pos;
|
|
shared_pos += map_size;
|
|
if (!sec[i].PointerToRawData || !file_size) continue;
|
|
toread = file_size;
|
|
while (toread)
|
|
{
|
|
long res = pread( fd, buffer + file_size - toread, toread, read_pos );
|
|
if (!res && toread < 0x200) /* partial sector at EOF is not an error */
|
|
{
|
|
file_size -= toread;
|
|
break;
|
|
}
|
|
if (res <= 0) goto error;
|
|
toread -= res;
|
|
read_pos += res;
|
|
}
|
|
if (pwrite( shared_fd, buffer, file_size, write_pos ) != file_size) goto error;
|
|
}
|
|
free( buffer );
|
|
return 1;
|
|
|
|
error:
|
|
release_object( mapping->shared_file );
|
|
mapping->shared_file = NULL;
|
|
free( buffer );
|
|
return 0;
|
|
}
|
|
|
|
/* retrieve the mapping parameters for an executable (PE) image */
|
|
static unsigned int get_image_params( struct mapping *mapping, file_pos_t file_size, int unix_fd )
|
|
{
|
|
IMAGE_DOS_HEADER dos;
|
|
IMAGE_SECTION_HEADER *sec = NULL;
|
|
struct
|
|
{
|
|
DWORD Signature;
|
|
IMAGE_FILE_HEADER FileHeader;
|
|
union
|
|
{
|
|
IMAGE_OPTIONAL_HEADER32 hdr32;
|
|
IMAGE_OPTIONAL_HEADER64 hdr64;
|
|
} opt;
|
|
} nt;
|
|
off_t pos;
|
|
int size;
|
|
|
|
/* load the headers */
|
|
|
|
if (!file_size) return STATUS_INVALID_FILE_FOR_SECTION;
|
|
if (pread( unix_fd, &dos, sizeof(dos), 0 ) != sizeof(dos)) return STATUS_INVALID_IMAGE_NOT_MZ;
|
|
if (dos.e_magic != IMAGE_DOS_SIGNATURE) return STATUS_INVALID_IMAGE_NOT_MZ;
|
|
pos = dos.e_lfanew;
|
|
|
|
size = pread( unix_fd, &nt, sizeof(nt), pos );
|
|
if (size < sizeof(nt.Signature) + sizeof(nt.FileHeader)) return STATUS_INVALID_IMAGE_FORMAT;
|
|
/* zero out Optional header in the case it's not present or partial */
|
|
size = min( size, sizeof(nt.Signature) + sizeof(nt.FileHeader) + nt.FileHeader.SizeOfOptionalHeader );
|
|
if (size < sizeof(nt)) memset( (char *)&nt + size, 0, sizeof(nt) - size );
|
|
if (nt.Signature != IMAGE_NT_SIGNATURE)
|
|
{
|
|
if (*(WORD *)&nt.Signature == IMAGE_OS2_SIGNATURE) return STATUS_INVALID_IMAGE_NE_FORMAT;
|
|
return STATUS_INVALID_IMAGE_PROTECT;
|
|
}
|
|
|
|
mapping->cpu = current->process->cpu;
|
|
switch (mapping->cpu)
|
|
{
|
|
case CPU_x86:
|
|
if (nt.FileHeader.Machine != IMAGE_FILE_MACHINE_I386) return STATUS_INVALID_IMAGE_FORMAT;
|
|
if (nt.opt.hdr32.Magic != IMAGE_NT_OPTIONAL_HDR32_MAGIC) return STATUS_INVALID_IMAGE_FORMAT;
|
|
break;
|
|
case CPU_x86_64:
|
|
if (nt.FileHeader.Machine != IMAGE_FILE_MACHINE_AMD64) return STATUS_INVALID_IMAGE_FORMAT;
|
|
if (nt.opt.hdr64.Magic != IMAGE_NT_OPTIONAL_HDR64_MAGIC) return STATUS_INVALID_IMAGE_FORMAT;
|
|
break;
|
|
case CPU_POWERPC:
|
|
if (nt.FileHeader.Machine != IMAGE_FILE_MACHINE_POWERPC) return STATUS_INVALID_IMAGE_FORMAT;
|
|
if (nt.opt.hdr32.Magic != IMAGE_NT_OPTIONAL_HDR32_MAGIC) return STATUS_INVALID_IMAGE_FORMAT;
|
|
break;
|
|
case CPU_ARM:
|
|
if (nt.FileHeader.Machine != IMAGE_FILE_MACHINE_ARM &&
|
|
nt.FileHeader.Machine != IMAGE_FILE_MACHINE_THUMB &&
|
|
nt.FileHeader.Machine != IMAGE_FILE_MACHINE_ARMNT) return STATUS_INVALID_IMAGE_FORMAT;
|
|
if (nt.opt.hdr32.Magic != IMAGE_NT_OPTIONAL_HDR32_MAGIC) return STATUS_INVALID_IMAGE_FORMAT;
|
|
break;
|
|
case CPU_ARM64:
|
|
if (nt.FileHeader.Machine != IMAGE_FILE_MACHINE_ARM64) return STATUS_INVALID_IMAGE_FORMAT;
|
|
if (nt.opt.hdr64.Magic != IMAGE_NT_OPTIONAL_HDR64_MAGIC) return STATUS_INVALID_IMAGE_FORMAT;
|
|
break;
|
|
default:
|
|
return STATUS_INVALID_IMAGE_FORMAT;
|
|
}
|
|
|
|
switch (nt.opt.hdr32.Magic)
|
|
{
|
|
case IMAGE_NT_OPTIONAL_HDR32_MAGIC:
|
|
mapping->image.base = nt.opt.hdr32.ImageBase;
|
|
mapping->image.entry_point = nt.opt.hdr32.ImageBase + nt.opt.hdr32.AddressOfEntryPoint;
|
|
mapping->image.map_size = ROUND_SIZE( nt.opt.hdr32.SizeOfImage );
|
|
mapping->image.stack_size = nt.opt.hdr32.SizeOfStackReserve;
|
|
mapping->image.stack_commit = nt.opt.hdr32.SizeOfStackCommit;
|
|
mapping->image.subsystem = nt.opt.hdr32.Subsystem;
|
|
mapping->image.subsystem_low = nt.opt.hdr32.MinorSubsystemVersion;
|
|
mapping->image.subsystem_high = nt.opt.hdr32.MajorSubsystemVersion;
|
|
mapping->image.dll_charact = nt.opt.hdr32.DllCharacteristics;
|
|
mapping->image.loader_flags = nt.opt.hdr32.LoaderFlags;
|
|
mapping->image.header_size = nt.opt.hdr32.SizeOfHeaders;
|
|
mapping->image.checksum = nt.opt.hdr32.CheckSum;
|
|
break;
|
|
case IMAGE_NT_OPTIONAL_HDR64_MAGIC:
|
|
mapping->image.base = nt.opt.hdr64.ImageBase;
|
|
mapping->image.entry_point = nt.opt.hdr64.ImageBase + nt.opt.hdr64.AddressOfEntryPoint;
|
|
mapping->image.map_size = ROUND_SIZE( nt.opt.hdr64.SizeOfImage );
|
|
mapping->image.stack_size = nt.opt.hdr64.SizeOfStackReserve;
|
|
mapping->image.stack_commit = nt.opt.hdr64.SizeOfStackCommit;
|
|
mapping->image.subsystem = nt.opt.hdr64.Subsystem;
|
|
mapping->image.subsystem_low = nt.opt.hdr64.MinorSubsystemVersion;
|
|
mapping->image.subsystem_high = nt.opt.hdr64.MajorSubsystemVersion;
|
|
mapping->image.dll_charact = nt.opt.hdr64.DllCharacteristics;
|
|
mapping->image.loader_flags = nt.opt.hdr64.LoaderFlags;
|
|
mapping->image.header_size = nt.opt.hdr64.SizeOfHeaders;
|
|
mapping->image.checksum = nt.opt.hdr64.CheckSum;
|
|
break;
|
|
}
|
|
mapping->image.image_charact = nt.FileHeader.Characteristics;
|
|
mapping->image.machine = nt.FileHeader.Machine;
|
|
mapping->image.zerobits = 0; /* FIXME */
|
|
mapping->image.gp = 0; /* FIXME */
|
|
mapping->image.contains_code = 0; /* FIXME */
|
|
mapping->image.image_flags = 0; /* FIXME */
|
|
mapping->image.file_size = file_size;
|
|
|
|
/* load the section headers */
|
|
|
|
pos += sizeof(nt.Signature) + sizeof(nt.FileHeader) + nt.FileHeader.SizeOfOptionalHeader;
|
|
size = sizeof(*sec) * nt.FileHeader.NumberOfSections;
|
|
if (!mapping->size) mapping->size = mapping->image.map_size;
|
|
else if (mapping->size > mapping->image.map_size) return STATUS_SECTION_TOO_BIG;
|
|
if (pos + size > mapping->image.map_size) return STATUS_INVALID_FILE_FOR_SECTION;
|
|
if (pos + size > mapping->image.header_size) mapping->image.header_size = pos + size;
|
|
if (!(sec = malloc( size ))) goto error;
|
|
if (pread( unix_fd, sec, size, pos ) != size) goto error;
|
|
|
|
if (!build_shared_mapping( mapping, unix_fd, sec, nt.FileHeader.NumberOfSections )) goto error;
|
|
|
|
if (mapping->shared_file) list_add_head( &shared_list, &mapping->shared_entry );
|
|
|
|
free( sec );
|
|
return 0;
|
|
|
|
error:
|
|
free( sec );
|
|
return STATUS_INVALID_FILE_FOR_SECTION;
|
|
}
|
|
|
|
static struct ranges *create_ranges(void)
|
|
{
|
|
struct ranges *ranges = alloc_object( &ranges_ops );
|
|
|
|
if (!ranges) return NULL;
|
|
ranges->count = 0;
|
|
ranges->max = 8;
|
|
if (!(ranges->ranges = mem_alloc( ranges->max * sizeof(*ranges->ranges) )))
|
|
{
|
|
release_object( ranges );
|
|
return NULL;
|
|
}
|
|
return ranges;
|
|
}
|
|
|
|
static unsigned int get_mapping_flags( obj_handle_t handle, unsigned int flags )
|
|
{
|
|
switch (flags & (SEC_IMAGE | SEC_RESERVE | SEC_COMMIT | SEC_FILE))
|
|
{
|
|
case SEC_IMAGE:
|
|
if (flags & (SEC_WRITECOMBINE | SEC_LARGE_PAGES)) break;
|
|
if (handle) return SEC_FILE | SEC_IMAGE;
|
|
set_error( STATUS_INVALID_FILE_FOR_SECTION );
|
|
return 0;
|
|
case SEC_COMMIT:
|
|
if (!handle) return flags;
|
|
/* fall through */
|
|
case SEC_RESERVE:
|
|
if (flags & SEC_LARGE_PAGES) break;
|
|
if (handle) return SEC_FILE | (flags & (SEC_NOCACHE | SEC_WRITECOMBINE));
|
|
return flags;
|
|
}
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct object *create_mapping( struct object *root, const struct unicode_str *name,
|
|
unsigned int attr, mem_size_t size, unsigned int flags,
|
|
obj_handle_t handle, unsigned int file_access,
|
|
const struct security_descriptor *sd )
|
|
{
|
|
struct mapping *mapping;
|
|
struct file *file;
|
|
struct fd *fd;
|
|
int unix_fd;
|
|
struct stat st;
|
|
|
|
if (!page_mask) page_mask = sysconf( _SC_PAGESIZE ) - 1;
|
|
|
|
if (!(mapping = create_named_object( root, &mapping_ops, name, attr, sd )))
|
|
return NULL;
|
|
if (get_error() == STATUS_OBJECT_NAME_EXISTS)
|
|
return &mapping->obj; /* Nothing else to do */
|
|
|
|
mapping->size = size;
|
|
mapping->fd = NULL;
|
|
mapping->shared_file = NULL;
|
|
mapping->committed = NULL;
|
|
|
|
if (!(mapping->flags = get_mapping_flags( handle, flags ))) goto error;
|
|
|
|
if (handle)
|
|
{
|
|
const unsigned int sharing = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
|
|
unsigned int mapping_access = FILE_MAPPING_ACCESS;
|
|
|
|
if (!(file = get_file_obj( current->process, handle, file_access ))) goto error;
|
|
fd = get_obj_fd( (struct object *)file );
|
|
|
|
/* file sharing rules for mappings are different so we use magic the access rights */
|
|
if (flags & SEC_IMAGE) mapping_access |= FILE_MAPPING_IMAGE;
|
|
else if (file_access & FILE_WRITE_DATA) mapping_access |= FILE_MAPPING_WRITE;
|
|
|
|
if (!(mapping->fd = get_fd_object_for_mapping( fd, mapping_access, sharing )))
|
|
{
|
|
mapping->fd = dup_fd_object( fd, mapping_access, sharing, FILE_SYNCHRONOUS_IO_NONALERT );
|
|
if (mapping->fd) set_fd_user( mapping->fd, &mapping_fd_ops, NULL );
|
|
}
|
|
release_object( file );
|
|
release_object( fd );
|
|
if (!mapping->fd) goto error;
|
|
|
|
if ((unix_fd = get_unix_fd( mapping->fd )) == -1) goto error;
|
|
if (fstat( unix_fd, &st ) == -1)
|
|
{
|
|
file_set_error();
|
|
goto error;
|
|
}
|
|
if (flags & SEC_IMAGE)
|
|
{
|
|
unsigned int err = get_image_params( mapping, st.st_size, unix_fd );
|
|
if (!err) return &mapping->obj;
|
|
set_error( err );
|
|
goto error;
|
|
}
|
|
if (!mapping->size)
|
|
{
|
|
if (!(mapping->size = st.st_size))
|
|
{
|
|
set_error( STATUS_MAPPED_FILE_SIZE_ZERO );
|
|
goto error;
|
|
}
|
|
}
|
|
else if (st.st_size < mapping->size)
|
|
{
|
|
if (!(file_access & FILE_WRITE_DATA))
|
|
{
|
|
set_error( STATUS_SECTION_TOO_BIG );
|
|
goto error;
|
|
}
|
|
if (!grow_file( unix_fd, mapping->size )) goto error;
|
|
}
|
|
}
|
|
else /* Anonymous mapping (no associated file) */
|
|
{
|
|
if (!mapping->size)
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
goto error;
|
|
}
|
|
if ((flags & SEC_RESERVE) && !(mapping->committed = create_ranges())) goto error;
|
|
mapping->size = (mapping->size + page_mask) & ~((mem_size_t)page_mask);
|
|
if ((unix_fd = create_temp_file( mapping->size )) == -1) goto error;
|
|
if (!(mapping->fd = create_anonymous_fd( &mapping_fd_ops, unix_fd, &mapping->obj,
|
|
FILE_SYNCHRONOUS_IO_NONALERT ))) goto error;
|
|
allow_fd_caching( mapping->fd );
|
|
}
|
|
return &mapping->obj;
|
|
|
|
error:
|
|
release_object( mapping );
|
|
return NULL;
|
|
}
|
|
|
|
struct mapping *get_mapping_obj( struct process *process, obj_handle_t handle, unsigned int access )
|
|
{
|
|
return (struct mapping *)get_handle_obj( process, handle, access, &mapping_ops );
|
|
}
|
|
|
|
/* open a new file for the file descriptor backing the mapping */
|
|
struct file *get_mapping_file( struct process *process, client_ptr_t base,
|
|
unsigned int access, unsigned int sharing )
|
|
{
|
|
struct memory_view *view = find_mapped_view( process, base );
|
|
|
|
if (!view || !view->fd) return NULL;
|
|
return create_file_for_fd_obj( view->fd, access, sharing );
|
|
}
|
|
|
|
static void mapping_dump( struct object *obj, int verbose )
|
|
{
|
|
struct mapping *mapping = (struct mapping *)obj;
|
|
assert( obj->ops == &mapping_ops );
|
|
fprintf( stderr, "Mapping size=%08x%08x flags=%08x fd=%p shared_file=%p\n",
|
|
(unsigned int)(mapping->size >> 32), (unsigned int)mapping->size,
|
|
mapping->flags, mapping->fd, mapping->shared_file );
|
|
}
|
|
|
|
static struct object_type *mapping_get_type( struct object *obj )
|
|
{
|
|
static const WCHAR name[] = {'S','e','c','t','i','o','n'};
|
|
static const struct unicode_str str = { name, sizeof(name) };
|
|
return get_object_type( &str );
|
|
}
|
|
|
|
static struct fd *mapping_get_fd( struct object *obj )
|
|
{
|
|
struct mapping *mapping = (struct mapping *)obj;
|
|
return (struct fd *)grab_object( mapping->fd );
|
|
}
|
|
|
|
static unsigned int mapping_map_access( struct object *obj, unsigned int access )
|
|
{
|
|
if (access & GENERIC_READ) access |= STANDARD_RIGHTS_READ | SECTION_QUERY | SECTION_MAP_READ;
|
|
if (access & GENERIC_WRITE) access |= STANDARD_RIGHTS_WRITE | SECTION_MAP_WRITE;
|
|
if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE | SECTION_MAP_EXECUTE;
|
|
if (access & GENERIC_ALL) access |= SECTION_ALL_ACCESS;
|
|
return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
|
|
}
|
|
|
|
static void mapping_destroy( struct object *obj )
|
|
{
|
|
struct mapping *mapping = (struct mapping *)obj;
|
|
assert( obj->ops == &mapping_ops );
|
|
if (mapping->fd) release_object( mapping->fd );
|
|
if (mapping->committed) release_object( mapping->committed );
|
|
if (mapping->shared_file)
|
|
{
|
|
release_object( mapping->shared_file );
|
|
list_remove( &mapping->shared_entry );
|
|
}
|
|
}
|
|
|
|
static enum server_fd_type mapping_get_fd_type( struct fd *fd )
|
|
{
|
|
return FD_TYPE_FILE;
|
|
}
|
|
|
|
int get_page_size(void)
|
|
{
|
|
if (!page_mask) page_mask = sysconf( _SC_PAGESIZE ) - 1;
|
|
return page_mask + 1;
|
|
}
|
|
|
|
/* create a file mapping */
|
|
DECL_HANDLER(create_mapping)
|
|
{
|
|
struct object *root, *obj;
|
|
struct unicode_str name;
|
|
const struct security_descriptor *sd;
|
|
const struct object_attributes *objattr = get_req_object_attributes( &sd, &name, &root );
|
|
|
|
if (!objattr) return;
|
|
|
|
if ((obj = create_mapping( root, &name, objattr->attributes, req->size, req->flags,
|
|
req->file_handle, req->file_access, sd )))
|
|
{
|
|
if (get_error() == STATUS_OBJECT_NAME_EXISTS)
|
|
reply->handle = alloc_handle( current->process, obj, req->access, objattr->attributes );
|
|
else
|
|
reply->handle = alloc_handle_no_access_check( current->process, obj,
|
|
req->access, objattr->attributes );
|
|
release_object( obj );
|
|
}
|
|
|
|
if (root) release_object( root );
|
|
}
|
|
|
|
/* open a handle to a mapping */
|
|
DECL_HANDLER(open_mapping)
|
|
{
|
|
struct unicode_str name = get_req_unicode_str();
|
|
|
|
reply->handle = open_object( current->process, req->rootdir, req->access,
|
|
&mapping_ops, &name, req->attributes );
|
|
}
|
|
|
|
/* get a mapping information */
|
|
DECL_HANDLER(get_mapping_info)
|
|
{
|
|
struct mapping *mapping;
|
|
|
|
if (!(mapping = get_mapping_obj( current->process, req->handle, req->access ))) return;
|
|
|
|
reply->size = mapping->size;
|
|
reply->flags = mapping->flags;
|
|
|
|
if (mapping->flags & SEC_IMAGE)
|
|
set_reply_data( &mapping->image, min( sizeof(mapping->image), get_reply_max_size() ));
|
|
|
|
if (!(req->access & (SECTION_MAP_READ | SECTION_MAP_WRITE))) /* query only */
|
|
{
|
|
release_object( mapping );
|
|
return;
|
|
}
|
|
|
|
if ((mapping->flags & SEC_IMAGE) && mapping->cpu != current->process->cpu)
|
|
{
|
|
set_error( STATUS_INVALID_IMAGE_FORMAT );
|
|
release_object( mapping );
|
|
return;
|
|
}
|
|
|
|
if (mapping->shared_file)
|
|
reply->shared_file = alloc_handle( current->process, mapping->shared_file,
|
|
GENERIC_READ|GENERIC_WRITE, 0 );
|
|
release_object( mapping );
|
|
}
|
|
|
|
/* add a memory view in the current process */
|
|
DECL_HANDLER(map_view)
|
|
{
|
|
struct mapping *mapping = NULL;
|
|
struct memory_view *view;
|
|
|
|
if (!req->size || (req->base & page_mask) || req->base + req->size < req->base) /* overflow */
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
return;
|
|
}
|
|
|
|
/* make sure we don't already have an overlapping view */
|
|
LIST_FOR_EACH_ENTRY( view, ¤t->process->views, struct memory_view, entry )
|
|
{
|
|
if (view->base + view->size <= req->base) continue;
|
|
if (view->base >= req->base + req->size) continue;
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
return;
|
|
}
|
|
|
|
if (!(mapping = get_mapping_obj( current->process, req->mapping, req->access ))) return;
|
|
|
|
if (mapping->flags & SEC_IMAGE)
|
|
{
|
|
if (req->start || req->size > mapping->image.map_size)
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
goto done;
|
|
}
|
|
}
|
|
else if (req->start >= mapping->size ||
|
|
req->start + req->size < req->start ||
|
|
req->start + req->size > ((mapping->size + page_mask) & ~(mem_size_t)page_mask))
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
goto done;
|
|
}
|
|
|
|
if ((view = mem_alloc( sizeof(*view) )))
|
|
{
|
|
view->base = req->base;
|
|
view->size = req->size;
|
|
view->start = req->start;
|
|
view->flags = mapping->flags;
|
|
view->fd = !is_fd_removable( mapping->fd ) ? (struct fd *)grab_object( mapping->fd ) : NULL;
|
|
view->committed = mapping->committed ? (struct ranges *)grab_object( mapping->committed ) : NULL;
|
|
list_add_tail( ¤t->process->views, &view->entry );
|
|
}
|
|
|
|
done:
|
|
release_object( mapping );
|
|
}
|
|
|
|
/* unmap a memory view from the current process */
|
|
DECL_HANDLER(unmap_view)
|
|
{
|
|
struct memory_view *view = find_mapped_view( current->process, req->base );
|
|
|
|
if (view) free_memory_view( view );
|
|
}
|
|
|
|
/* get a range of committed pages in a file mapping */
|
|
DECL_HANDLER(get_mapping_committed_range)
|
|
{
|
|
struct memory_view *view = find_mapped_view( current->process, req->base );
|
|
|
|
if (view) reply->committed = find_committed_range( view, req->offset, &reply->size );
|
|
}
|
|
|
|
/* add a range to the committed pages in a file mapping */
|
|
DECL_HANDLER(add_mapping_committed_range)
|
|
{
|
|
struct memory_view *view = find_mapped_view( current->process, req->base );
|
|
|
|
if (view) add_committed_range( view, req->offset, req->offset + req->size );
|
|
}
|
|
|
|
/* check if two memory maps are for the same file */
|
|
DECL_HANDLER(is_same_mapping)
|
|
{
|
|
struct memory_view *view1 = find_mapped_view( current->process, req->base1 );
|
|
struct memory_view *view2 = find_mapped_view( current->process, req->base2 );
|
|
|
|
if (!view1 || !view2) return;
|
|
if (!view1->fd || !view2->fd ||
|
|
!(view1->flags & SEC_IMAGE) || !(view2->flags & SEC_IMAGE) ||
|
|
!is_same_file_fd( view1->fd, view2->fd ))
|
|
set_error( STATUS_NOT_SAME_DEVICE );
|
|
}
|