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setupapi: Extract the 16-bit fake dll from the 32-bit PE one. 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2019-05-18 09:29:04 +02:00
parent c4e0b9d092
commit 16851b1c12
1 changed files with 46 additions and 0 deletions
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46
dlls/setupapi/fakedll.c
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@ -190,6 +190,50 @@ failed:
return FALSE;
}
static int is_valid_ptr( const void *data, SIZE_T size, const void *ptr, SIZE_T ptr_size )
{
if (ptr < data) return 0;
if ((char *)ptr - (char *)data >= size) return 0;
return (size - ((char *)ptr - (char *)data) >= ptr_size);
}
/* extract the 16-bit NE dll from a PE builtin */
static void extract_16bit_image( IMAGE_NT_HEADERS *nt, void **data, SIZE_T *size )
{
DWORD exp_size, *size_ptr;
IMAGE_DOS_HEADER *dos;
IMAGE_EXPORT_DIRECTORY *exports;
IMAGE_SECTION_HEADER *section = NULL;
WORD *ordinals;
DWORD *names, *functions;
int i;
exports = RtlImageDirectoryEntryToData( *data, FALSE, IMAGE_DIRECTORY_ENTRY_EXPORT, &exp_size );
if (!is_valid_ptr( *data, *size, exports, exp_size )) return;
ordinals = RtlImageRvaToVa( nt, *data, exports->AddressOfNameOrdinals, &section );
names = RtlImageRvaToVa( nt, *data, exports->AddressOfNames, &section );
functions = RtlImageRvaToVa( nt, *data, exports->AddressOfFunctions, &section );
if (!is_valid_ptr( *data, *size, ordinals, exports->NumberOfNames * sizeof(*ordinals) )) return;
if (!is_valid_ptr( *data, *size, names, exports->NumberOfNames * sizeof(*names) )) return;
for (i = 0; i < exports->NumberOfNames; i++)
{
char *ename = RtlImageRvaToVa( nt, *data, names[i], &section );
if (strcmp( ename, "__wine_spec_dos_header" )) continue;
if (ordinals[i] >= exports->NumberOfFunctions) return;
if (!is_valid_ptr( *data, *size, functions, sizeof(*functions) )) return;
if (!functions[ordinals[i]]) return;
dos = RtlImageRvaToVa( nt, *data, functions[ordinals[i]], NULL );
if (!is_valid_ptr( *data, *size, dos, sizeof(*dos) )) return;
if (dos->e_magic != IMAGE_DOS_SIGNATURE) return;
size_ptr = (DWORD *)dos->e_res2;
*size = min( *size_ptr, *size - ((const char *)dos - (const char *)*data) );
*size_ptr = 0;
*data = dos;
break;
}
}
/* 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, BOOL expect_builtin )
@ -238,6 +282,8 @@ static int read_file( const char *name, void **data, SIZE_T *size, BOOL expect_b
st.st_size - header_size, header_size ) == st.st_size - header_size)
{
*data = file_buffer;
if (strlen(name) > 2 && !strcmp( name + strlen(name) - 2, "16" ))
extract_16bit_image( nt, data, size );
ret = 1;
}
done: