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setupapi: Allocate a virtual memory buffer to read fake dll files.

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This commit is contained in:
Alexandre Julliard 2011-08-02 12:58:26 +02:00
parent 81bb472db9
commit 39a4c2532b
1 changed files with 17 additions and 21 deletions
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38
dlls/setupapi/fakedll.c
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@ -55,7 +55,7 @@ static const unsigned int section_alignment = 4096;
static const unsigned int max_dll_name_len = 64;
static void *file_buffer;
static size_t file_buffer_size;
static SIZE_T file_buffer_size;
static unsigned int handled_count;
static unsigned int handled_total;
static char **handled_dlls;
@ -187,11 +187,9 @@ failed:
/* read in the contents of a file into the global file buffer */
/* return 1 on success, 0 on nonexistent file, -1 on other error */
static int read_file( const char *name, void **data, size_t *size )
static int read_file( const char *name, void **data, SIZE_T *size )
{
static char static_file_buffer[4096];
struct stat st;
void *buffer = static_file_buffer;
int fd, ret = -1;
size_t header_size;
IMAGE_DOS_HEADER *dos;
@ -202,29 +200,27 @@ static int read_file( const char *name, void **data, size_t *size )
if ((fd = open( name, O_RDONLY | O_BINARY )) == -1) return 0;
if (fstat( fd, &st ) == -1) goto done;
*size = st.st_size;
if (st.st_size > sizeof(static_file_buffer))
if (!file_buffer || st.st_size > file_buffer_size)
{
if (!file_buffer || st.st_size > file_buffer_size)
{
HeapFree( GetProcessHeap(), 0, file_buffer );
if (!(file_buffer = HeapAlloc( GetProcessHeap(), 0, st.st_size ))) goto done;
file_buffer_size = st.st_size;
}
buffer = file_buffer;
VirtualFree( file_buffer, 0, MEM_RELEASE );
file_buffer = NULL;
file_buffer_size = st.st_size;
if (NtAllocateVirtualMemory( GetCurrentProcess(), &file_buffer, 0, &file_buffer_size,
MEM_COMMIT, PAGE_READWRITE )) goto done;
}
/* check for valid fake dll file */
if (st.st_size < min_size) goto done;
header_size = min( st.st_size, 4096 );
if (pread( fd, buffer, header_size, 0 ) != header_size) goto done;
dos = buffer;
if (pread( fd, file_buffer, header_size, 0 ) != header_size) goto done;
dos = file_buffer;
if (dos->e_magic != IMAGE_DOS_SIGNATURE) goto done;
if (dos->e_lfanew < sizeof(fakedll_signature)) goto done;
if (memcmp( dos + 1, fakedll_signature, sizeof(fakedll_signature) )) goto done;
if (dos->e_lfanew + FIELD_OFFSET(IMAGE_NT_HEADERS,OptionalHeader.MajorLinkerVersion) > header_size)
goto done;
nt = (IMAGE_NT_HEADERS *)((char *)buffer + dos->e_lfanew);
nt = (IMAGE_NT_HEADERS *)((char *)file_buffer + dos->e_lfanew);
if (nt->Signature == IMAGE_NT_SIGNATURE && nt->OptionalHeader.Magic != IMAGE_NT_OPTIONAL_HDR_MAGIC)
{
/* wrong 32/64 type, pretend it doesn't exist */
@ -232,10 +228,10 @@ static int read_file( const char *name, void **data, size_t *size )
goto done;
}
if (st.st_size == header_size ||
pread( fd, (char *)buffer + header_size,
pread( fd, (char *)file_buffer + header_size,
st.st_size - header_size, header_size ) == st.st_size - header_size)
{
*data = buffer;
*data = file_buffer;
ret = 1;
}
done:
@ -380,7 +376,7 @@ static inline char *prepend( char *buffer, const char *str, size_t len )
}
/* try to load a pre-compiled fake dll */
static void *load_fake_dll( const WCHAR *name, size_t *size )
static void *load_fake_dll( const WCHAR *name, SIZE_T *size )
{
const char *build_dir = wine_get_build_dir();
const char *path;
@ -473,7 +469,7 @@ static HANDLE create_dest_file( const WCHAR *name )
static void install_fake_dll( WCHAR *dest, char *file, const char *ext )
{
int ret;
size_t size;
SIZE_T size;
void *data;
DWORD written;
WCHAR *destname = dest + strlenW(dest);
@ -581,7 +577,7 @@ BOOL create_fake_dll( const WCHAR *name, const WCHAR *source )
{
HANDLE h;
BOOL ret;
size_t size;
SIZE_T size;
const WCHAR *filename;
void *buffer;
@ -631,7 +627,7 @@ BOOL create_fake_dll( const WCHAR *name, const WCHAR *source )
*/
void cleanup_fake_dlls(void)
{
HeapFree( GetProcessHeap(), 0, file_buffer );
if (file_buffer) VirtualFree( file_buffer, 0, MEM_RELEASE );
file_buffer = NULL;
HeapFree( GetProcessHeap(), 0, handled_dlls );
handled_dlls = NULL;