ReceiveTempSMS
/
Sweden-Number
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

server: Add support for image mappings for both 32- and 64-bit PE formats.

This commit is contained in:
Alexandre Julliard 2009-08-12 12:53:16 +02:00
parent 0ddc6d5287
commit 95d3a722ab
1 changed files with 35 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
server/mapping.c
View File

@ -303,11 +303,20 @@ static int build_shared_mapping( struct mapping *mapping, int fd,
static int get_image_params( struct mapping *mapping )
{
IMAGE_DOS_HEADER dos;
IMAGE_NT_HEADERS nt;
IMAGE_SECTION_HEADER *sec = NULL;
struct
{
DWORD Signature;
IMAGE_FILE_HEADER FileHeader;
union
{
IMAGE_OPTIONAL_HEADER32 hdr32;
IMAGE_OPTIONAL_HEADER64 hdr64;
} opt;
} nt;
struct fd *fd;
off_t pos;
int unix_fd, size, toread;
int unix_fd, size;
/* load the headers */
@ -317,22 +326,34 @@ static int get_image_params( struct mapping *mapping )
if (dos.e_magic != IMAGE_DOS_SIGNATURE) goto error;
pos = dos.e_lfanew;
if (pread( unix_fd, &nt.Signature, sizeof(nt.Signature), pos ) != sizeof(nt.Signature))
goto error;
pos += sizeof(nt.Signature);
if (nt.Signature != IMAGE_NT_SIGNATURE) goto error;
if (pread( unix_fd, &nt.FileHeader, sizeof(nt.FileHeader), pos ) != sizeof(nt.FileHeader))
goto error;
pos += sizeof(nt.FileHeader);
size = pread( unix_fd, &nt, sizeof(nt), pos );
if (size < sizeof(nt.Signature) + sizeof(nt.FileHeader)) goto error;
/* zero out Optional header in the case it's not present or partial */
memset(&nt.OptionalHeader, 0, sizeof(nt.OptionalHeader));
toread = min( sizeof(nt.OptionalHeader), nt.FileHeader.SizeOfOptionalHeader );
if (pread( unix_fd, &nt.OptionalHeader, toread, pos ) != toread) goto error;
pos += nt.FileHeader.SizeOfOptionalHeader;
if (size < sizeof(nt)) memset( (char *)&nt + size, 0, sizeof(nt) - size );
if (nt.Signature != IMAGE_NT_SIGNATURE) goto error;
switch (nt.opt.hdr32.Magic)
{
case IMAGE_NT_OPTIONAL_HDR32_MAGIC:
mapping->size = ROUND_SIZE( nt.opt.hdr32.SizeOfImage );
mapping->base = nt.opt.hdr32.ImageBase;
mapping->header_size = nt.opt.hdr32.SizeOfHeaders;
break;
case IMAGE_NT_OPTIONAL_HDR64_MAGIC:
mapping->size = ROUND_SIZE( nt.opt.hdr64.SizeOfImage );
mapping->base = nt.opt.hdr64.ImageBase;
mapping->header_size = nt.opt.hdr64.SizeOfHeaders;
break;
default:
goto error;
}
/* load the section headers */
pos += sizeof(nt.Signature) + sizeof(nt.FileHeader) + nt.FileHeader.SizeOfOptionalHeader;
size = sizeof(*sec) * nt.FileHeader.NumberOfSections;
if (pos + size > mapping->size) goto error;
if (pos + size > mapping->header_size) mapping->header_size = pos + size;
if (!(sec = malloc( size ))) goto error;
if (pread( unix_fd, sec, size, pos ) != size) goto error;
@ -340,14 +361,7 @@ static int get_image_params( struct mapping *mapping )
if (mapping->shared_file) list_add_head( &shared_list, &mapping->shared_entry );
mapping->size = ROUND_SIZE( nt.OptionalHeader.SizeOfImage );
mapping->base = nt.OptionalHeader.ImageBase;
mapping->header_size = max( pos + size, nt.OptionalHeader.SizeOfHeaders );
mapping->protect = VPROT_IMAGE;
/* sanity check */
if (pos + size > mapping->size) goto error;
mapping->protect = VPROT_IMAGE;
free( sec );
release_object( fd );
return 1;