/*---------------------------------------------------------------------------*/
static int32_t
find_file(const char *name)
{
struct file_header hdr;
int32_t page;
page = dir_cache_find(name);
if(page >= 0) {
return page;
}
page = 0;
do {
READ_HEADER(&hdr, page);
if(COFFEE_PAGE_ACTIVE(hdr)) {
if(strcmp(name, hdr.name) == 0) {
dir_cache_add(name[0], page);
return page;
}
page += hdr.max_pages;
} else if(COFFEE_PAGE_ISOLATED(hdr)) {
++page;
} else if(COFFEE_PAGE_OBSOLETE(hdr)) {
page += hdr.max_pages;
} else {
/* It follows from the properties of the page allocation algorithm
that if a free page is encountered, then the rest of the sector
is also free. */
page = (page + COFFEE_PAGES_PER_SECTOR) & ~(COFFEE_PAGES_PER_SECTOR - 1);
}
watchdog_periodic();
} while(page < COFFEE_PAGE_COUNT);
return -1;
}
/*---------------------------------------------------------------------------*/
static int
find_contiguous_pages(unsigned wanted)
{
int page, start;
struct file_header hdr;
start = -1;
for(page = 0; page < COFFEE_PAGE_COUNT;) {
READ_HEADER(&hdr, page);
if(COFFEE_PAGE_FREE(hdr)) {
if(start == -1) {
start = page;
} else {
if(start + wanted <= page) {
return start;
}
}
/* Jump to the next sector. */
page = (page + COFFEE_PAGES_PER_SECTOR) & ~(COFFEE_PAGES_PER_SECTOR - 1);
} else if(COFFEE_PAGE_ISOLATED(hdr)) {
++page;
} else {
start = -1;
page += hdr.max_pages;
}
}
return -1;
}
/*!
******************************************************************************
@Function PVRSRVTimeTraceItemSize
@Description
Calculate the size of a trace item
@Input psTraceItem : Trace item
@Return size of trace item
******************************************************************************/
static IMG_UINT32
PVRSRVTimeTraceItemSize(IMG_UINT32 *psTraceItem)
{
IMG_UINT32 ui32Size = PVRSRV_TRACE_ITEM_SIZE;
ui32Size += READ_HEADER(SIZE, psTraceItem[PVRSRV_TRACE_DATA_HEADER]);
return ui32Size;
}
int print_trx(const char* filename){
u_int8_t buf[TRX_HEADER_SIZE];
int fd = open(filename,O_RDONLY);
if(fd < 0){
perror("can't open file:");
return -1;
}
int size;
struct trx_header header;
READ_HEADER(header.magic);
READ_HEADER(header.file_length);
READ_HEADER(header.crc32);
READ_HEADER(header.flags);
READ_HEADER(header.version);
for (int i = 0; i < NUM_OFFSETS; i++){
READ_HEADER(header.offsets[i]);
}
printf("magic = 0x%04x\n",header.magic);
printf("length = %d\n", header.file_length);
printf("crc32 = %u\n", header.crc32);
printf("~crc32 = %u\n", ~header.crc32);
printf("flags = 0x%04x\n", header.flags);
printf("version = %d\n", header.version);
for (int i = 0; i < NUM_OFFSETS; i++){
printf("offset[%d] = %d\n", i, header.offsets[i]);
}
close(fd);
return 0;
}
/*---------------------------------------------------------------------------*/
static int32_t
find_offset_in_file(int first_page)
{
struct file_header hdr;
unsigned char buf[COFFEE_PAGE_SIZE];
int page;
int i;
int search_limit;
uint32_t range_start, range_end, part_size;
READ_HEADER(&hdr, first_page);
for(search_limit = i = 0; i < sizeof(hdr.eof_hint) * CHAR_BIT; i++) {
if(hdr.eof_hint >> i) {
search_limit = i + 1;
}
}
part_size = hdr.max_pages / sizeof(hdr.eof_hint) / CHAR_BIT;
if(part_size == 0) {
part_size = 1;
}
range_start = part_size * search_limit;
range_end = range_start + part_size;
if(range_end > hdr.max_pages) {
range_end = hdr.max_pages;
}
/*
* Move from the end of the range towards the beginning and look for
* a byte that has been modified.
*
* An important implication of this is that if the last written bytes
* are zeroes, then these are skipped from the calculation.
*/
for(page = first_page + range_end; page >= first_page + range_start; page--) {
watchdog_periodic();
COFFEE_READ(buf, sizeof(buf), page * COFFEE_PAGE_SIZE);
for(i = COFFEE_PAGE_SIZE - 1; i >= 0; i--) {
if(buf[i] != 0) {
if(page == first_page) {
return i < sizeof(hdr) ? 0 : 1 + i - sizeof(hdr);
} else {
return 1 + i + (page - first_page) * COFFEE_PAGE_SIZE - sizeof(hdr);
}
}
}
}
/* All bytes are writable. */
return 0;
}
/*---------------------------------------------------------------------------*/
static int
remove_by_page(uint16_t page, int remove_log, int close_fds)
{
struct file_header hdr;
int i;
uint16_t log_page;
if(page >= COFFEE_PAGE_COUNT) {
return -1;
}
READ_HEADER(&hdr, page);
if(!COFFEE_PAGE_ACTIVE(hdr)) {
return -1;
}
dir_cache_del(page);
hdr.flags |= COFFEE_FLAG_OBSOLETE;
WRITE_HEADER(&hdr, page);
if(remove_log && COFFEE_PAGE_MODIFIED(hdr)) {
log_page = hdr.log_page;
dir_cache_del(log_page);
READ_HEADER(&hdr, log_page);
hdr.flags |= COFFEE_FLAG_OBSOLETE;
WRITE_HEADER(&hdr, log_page);
}
/* Close all file descriptors that reference the remove file. */
if(close_fds) {
for(i = 0; i < COFFEE_FD_SET_SIZE; i++) {
if(coffee_fd_set[i].file_page == page) {
coffee_fd_set[i].flags = COFFEE_FD_FREE;
}
}
}
return 0;
}
/*---------------------------------------------------------------------------*/
static int32_t
dir_cache_find(const char *name)
{
int i;
struct file_header hdr;
for(i = 0; i < COFFEE_DIR_CACHE_ENTRIES; i++) {
if(*name == dir_cache[i].filename_start) {
READ_HEADER(&hdr, dir_cache[i].page);
if(!COFFEE_PAGE_ACTIVE(hdr)) {
dir_cache[i].filename_start = '\0';
} else if(strcmp(hdr.name, name) == 0) {
return dir_cache[i].page;
}
}
}
return -1;
}
/*----------------------------------------------------------------------+*/
protocol_request_ptr SPC_Read_Protocol(SPC_Connection_Ptr connection)
/*----------------------------------------------------------------------+*/
{
int channel_id;
protocol_request_ptr prot;
buffered_data_ptr dptr;
int len;
if(!connection->connected)
return(SPC_ERROR);
if((prot=SPC_New_Protocol_Ptr(NULL, 0, 0))==SPC_ERROR) {
SPC_Close_Connection(connection);
return(SPC_ERROR);
}
/* read header */
dptr=prot->dataptr;
len=SPC_Read_Chars(connection, REQUEST_HEADER_LENGTH, dptr->data);
if(len != REQUEST_HEADER_LENGTH) {
SPC_Close_Connection(connection);
SPC_Free_Protocol_Ptr(prot);
return(SPC_ERROR);
}
/* we have the header. Parse out the fields */
READ_HEADER(dptr,
&channel_id, &prot->request_type, &dptr->len, &prot->seqno);
prot->channel=SPC_Lookup_Channel(channel_id, connection);
/* JET - 11/12/2001 - correct an exploitable buffer overrun where the user */
/* can supply a data len that is larger than the available buffer */
/* MAXREQLEN */
/* CERT - VU#172583 */
if (dptr->len >= MAXREQLEN)
{ /* we have a problem. Initiate DefCon 1 */
/* and launch our missiles. */
XeString connection_hostname = CONNECTION_HOSTNAME(connection);
SPC_Error(SPC_Buffer_Overflow, connection_hostname);
XeFree(connection_hostname);
SPC_Close_Connection(connection);
SPC_Free_Protocol_Ptr(prot);
return(SPC_ERROR);
}
/* read header */
len=SPC_Read_Chars(connection, dptr->len, dptr->data+REQUEST_HEADER_LENGTH);
if(len != dptr->len) {
SPC_Close_Connection(connection);
SPC_Free_Protocol_Ptr(prot);
return(SPC_ERROR);
}
dptr->offset=REQUEST_HEADER_LENGTH;
return(prot);
}
