u_int32 read_file (u_int32 handle,u_int32 buf_len,void*buf ,u_int32 send_pid){
/*patch：判断权限*/
int i;
int8*buffer=(int8*)transTolinerAddr((u_int32)buf,send_pid,1);
/*patch：判断handle的有效性*/
u_int32 size=fat.i_node_arr[handle].byte_size;
/*请求长度超过了文件长度，只读取本文件*/
if(buf_len>size)
buf_len=size;
u_int32 read_sects=buf_len/512;
u_int32 start=fat.i_node_arr[handle].startSector;
u_int32 pos=0;
for(i=start;i<start+read_sects;i++,pos+=512)
while(read_sector(i,buffer+pos)==FALSE);
if((buf_len%512)==0)
{
return buf_len;
}
else
{/*否则对最后一个扇区特殊处理*/
int8 tempBuf[512];
while(read_sector(start+read_sects,tempBuf)==FALSE);
memcpy8(tempBuf,buffer+read_sects*512,buf_len%512);
return buf_len;
}
}
void
report(int fd)
{
uint8_t *vdit, *vdit2, *tmpvdit;
size_t vditsize, vditsize2;
struct vdm_label *dl;
struct vdm_boot_info *bi;
struct disklabel *lp;
uint8_t sector[VDM_BLOCK_SIZE];
struct vdit_block_header *hdr;
read_sector(fd, VDM_LABEL_SECTOR, sector);
analyze_label_sector(sector, &dl, &bi);
if (dl == NULL)
return;
printf("label version %04x\n", betoh16(dl->version));
if (bi != NULL)
printf("disk boot info: start %08x size %08x version %08x\n",
betoh32(bi->boot_start),
betoh32(bi->boot_size), betoh32(bi->version));
read_sector(fd, VDIT_SECTOR, sector);
hdr = (struct vdit_block_header *)sector;
if (VDM_ID_KIND(&hdr->id) != VDIT_BLOCK_HEAD_BE) {
lp = (struct disklabel *)(sector + LABELOFFSET);
if (lp->d_magic == DISKMAGIC && lp->d_magic2 == DISKMAGIC) {
if (verbose)
printf("no VDIT but a native OpenBSD label\n");
return;
}
errx(3, "unexpected block kind on sector %08x: %02x",
1, VDM_ID_KIND(&hdr->id));
}
vdit = read_vdit(fd, 1, &vditsize);
if (vdit != NULL) {
tmpvdit = vdit;
while (tmpvdit != NULL)
tmpvdit = print_vdit_entry(tmpvdit);
vdit2 = read_vdit(fd, betoh32(hdr->secondary_vdit), &vditsize2);
if (vdit2 == NULL)
printf("can't read backup VDIT\n");
else {
if (vditsize2 < vditsize) {
printf("WARNING: backup VDIT is smaller "
"than main VDIT!\n");
vditsize = vditsize2;
}
if (memcmp(vdit, vdit2, vditsize) != 0)
printf("VDIT and backup VDIT differ!\n");
free(vdit2);
}
free(vdit);
}
}
// reads the FAT to determine the next cluster in the
// list after the given cluster.
static unsigned int next_cluster(int cluster)
{
void* b = fat;
unsigned offset;
if (fat_type == TFAT12)
offset = cluster + (cluster / 2);
else if (fat_type == TFAT16)
offset = cluster * 2;
else
offset = cluster * 4;
int sector = offset / bpb.BytsPerSec + bpb.RsvdSecCnt;
if (sector != cur_fat_sec)
{
read_sector(sector, &b);
if (fat_type == TFAT12)
read_sector(sector+1, &b);
}
cur_fat_sec = sector;
if (fat_type == TFAT12)
{
if (cluster & 1)
return *(unsigned short*)(fat+(offset % bpb.BytsPerSec)) >> 4;
else
return *(unsigned short*)(fat+(offset % bpb.BytsPerSec)) & 0xFFF;
}
uint8_t floppy_read(uint8_t C,uint8_t H,uint8_t S) {
if(S != 18) {
read_sector(C,H,S+1);
} else {
if(H != 1) {
read_sector(C,H+1,0);
} else if(C != 80) {
read_sector(C+1,0,0);
}
}
memcpy((uint8_t *)0xA00,(uint8_t *)0xC00,0x200);
read_sector(C,H,S);
return 0;
}
// FSM
void disk_sched_irq_handler(){
irq_disable();
disk_job_str* current = disk_queue;
assert(current);
ctx_s* owner = current->ctx;
_dprint("DISK_IRQ\n");
switch(disk_state){
case DS_IDLE:
fprintf(stderr, "WARNING - %s:%d - UNEXPECTED INTERRUPT IN IDLE STATE.\n", __FILE__, __LINE__);
return;
case DS_SEEK:{
_dprint("SEEK TERMINE\n");
// on vient de finir le seek.
// Que faire maintenant ? > Dépend du type de tâche
switch(current->type){
case DJT_READ:
// on lance le read
disk_state = DS_READ;
read_sector(current->cyl, current->sect, current->buffer);
irq_enable();
return;
case DJT_WRITE:
// on lance le write
disk_state = DS_WRITE;
write_sector(current->cyl, current->sect, current->buffer);
irq_enable();
return;
case DJT_FORMAT:
// on lance le format
disk_state = DS_FORMAT;
mFormat(current->cyl, current->sect, 1, 0x0);
irq_enable();
return;
default:
// ???
return;
}
}
case DS_READ: // les données sont présentes dans le MASTERBUFFER. On les copie dans l buffer du job
_dprint("READ TERMINE\n");
assert(current->buffer);
memcpy(current->buffer, MASTERBUFFER, secSize);
case DS_WRITE:
case DS_FORMAT:
//disk_delete_job(current);
disk_queue = current->next;
// retour à idle
disk_state = DS_IDLE;
disk_ctx->status = CTXS_ACTIVABLE;
// réactiver contexte propriétaire.
owner->status = CTXS_ACTIVABLE;
_dprint("JOB DONE\n");
irq_enable();
return;
default:
return;
}
}
void UPD765A::read_data(bool deleted, bool scan)
{
result = check_cond(false);
if(result & ST1_MA) {
REGISTER_PHASE_EVENT(PHASE_EXEC, 10000);
return;
}
if(result) {
shift_to_result7();
return;
}
result = read_sector();
if(deleted) {
result ^= ST2_CM;
}
if((result & ~ST2_CM) && !(result & ST2_DD)) {
shift_to_result7();
return;
}
if((result & ST2_CM) && (command & 0x20)) {
REGISTER_PHASE_EVENT(PHASE_TIMER, 100000);
return;
}
int length = (id[3] & 7) ? (0x80 << (id[3] & 7)) : (__min(dtl, 0x80));
if(!scan) {
shift_to_read(length);
} else {
shift_to_scan(length);
}
return;
}
int main (int argc, char ** argv) {
int i;
unsigned int cylinder, sector;
unsigned char buffer[BUFSIZE];
if(argc !=3){
printf("Format necessite 2 arguments: le cylindre et le secteur\n");
exit(EXIT_FAILURE);
}
cylinder = atoi(argv[1]);
sector = atoi(argv[2]);
/* initialisation hardware */
if(init_hardware(HARDWARE_INI) == 0) {
fprintf(stderr, "Erreur lors de l'initialisation du hardware\n");
exit(EXIT_FAILURE);
}
for(i = 0; i < 15; i++)
IRQVECTOR[i] = nothing;
read_sector(cylinder,sector,buffer);
toHexa(buffer);
exit(EXIT_SUCCESS);
}
static int
cda_seek_sample (DB_fileinfo_t *_info, int sample)
{
trace("cda_seek_sample %d\n", sample);
cdda_info_t *info = (cdda_info_t *)_info;
const int sector = sample * SAMPLESIZE / SECTORSIZE + info->first_sector;
const int offset = sample * SAMPLESIZE % SECTORSIZE;
#if USE_PARANOIA
if (info->paranoia) {
paranoia_seek(info->paranoia, sector, SEEK_SET);
}
#endif
info->current_sector = sector;
const char *p_readbuf = read_sector(info);
if (!p_readbuf) {
return -1;
}
info->tail = (char *)p_readbuf + offset;
info->tail_length = SECTORSIZE - offset;
_info->readpos = (float)sample / _info->fmt.samplerate;
return 0;
}
/*
main qui prend 3 arguments en entrée:
./dmps cylinder sector value
il affiche la partie du disque désignée par les arguments cylinder & sector
*/
int main(int argc, char **argv){
init_hard();
int cylinder, sector;
uchar buffer[HDA_SECTORSIZE];
if(argc < 3){
printf("exe: ./dmps cylinder sector\n");
printf("Numero de cylindre: ");
scanf("%d", &cylinder);
printf("\tsector: ");
scanf("%d", §or);
} else {
cylinder = atoi(argv[1]);
sector = atoi(argv[2]);
}
assert(cylinder >= 0 && cylinder < HDA_MAXCYLINDER);
assert(sector >= 0 && sector < HDA_MAXSECTOR);
read_sector( (uint)cylinder, (uint)sector, buffer );
int i = 0;
int j = 0;
for(i=0; i<HDA_SECTORSIZE / 16; i++){
printf("0%03d: ", i * 16);
for(j=0; j<16; j++){
printf(" %02x", buffer[i*16 + j]);
}
printf("\n");
}
return 0;
}
// checks whether a file or folder exists in the root
// directory. If it does, the appropriate info structure is
// loaded when the function returns.
static int read_root_file(const char* filename, int is_dir)
{
int i;
void* b;
unsigned cluster = bpb32.RootClus;
if (fat_type == TFAT32)
{
while (!eof(cluster))
{
b = disk;
read_cluster(cluster, &b);
if (find_file(filename,cluster_size,is_dir)) return 1;
cluster = next_cluster(cluster);
}
}
else
{
for (i = 0; i < root_sectors; i++)
{
b = disk;
read_sector(root_start+i, &b);
if (find_file(filename,bpb.BytsPerSec,is_dir)) return 1;
}
}
return 0;
}
u_int32 write_file (u_int32 handle,u_int32 buf_len,void*buf,u_int32 send_pid ){
/*patch：判断权限*/
int i;
/*patch：判断handle的有效性*/
int8*buffer=(int8*)transTolinerAddr((u_int32)buf,send_pid,1);
u_int32 write_sects=buf_len/512;
/*patch:增加判断扇区超出文件拥有扇区*/
u_int32 start=fat.i_node_arr[handle].startSector;
u_int32 pos=0;
for(i=start;i<start+write_sects;i++,pos+=512)
while(write_sector(i,buffer+pos)==FALSE);
/*文件若变得更长，则需要更新信息*/
u_int32 size=fat.i_node_arr[handle].byte_size;
if(buf_len>size)
fat.i_node_arr[handle].byte_size=buf_len;
if((buf_len%512)==0)
{
return TRUE;
}
else
{/*否则对最后一个扇区特殊处理*/
int8 tempBuf[512];
while(read_sector(start+write_sects,tempBuf)==FALSE);
memcpy8(buffer+write_sects*512,tempBuf,buf_len%512);
while(write_sector(start+write_sects,tempBuf)==FALSE);
return TRUE;
}
}
unsigned int chained_cluster(unsigned int cluster)
{
unsigned int retVal=0;
do {
int fat_sector_num=cluster/(512/4);
int fat_sector_offset=(cluster*4)&0x1FF;
if (fat_sector_num>=sectors_per_fat) {
printf("ERROR: cluster number too large.\n");
retVal=-1; break;
}
// Read in the sector of FAT1
unsigned char fat_sector[512];
if (read_sector(partition_start+fat1_sector+fat_sector_num,fat_sector,0)) {
printf("ERROR: Failed to read sector $%x of first FAT\n",fat_sector_num);
retVal=-1; break;
}
// Set the bytes for this cluster to $0FFFFF8 to mark end of chain and in use
retVal=fat_sector[fat_sector_offset+0];
retVal|=fat_sector[fat_sector_offset+1]<<8;
retVal|=fat_sector[fat_sector_offset+2]<<16;
retVal|=fat_sector[fat_sector_offset+3]<<24;
printf("Cluster %d chains to cluster %d ($%x)\n",cluster,retVal,retVal);
} while(0);
return retVal;
}
FATDrive::FATDrive(LPCTSTR path)
: FATDirectory(*this, TEXT("\\"))
{
_bufl = 0;
_bufents = 0;
_SClus = 0;
_FATCache = NULL;
_CacheCount = 0;
_CacheSec = NULL;
_CacheCnt = NULL;
_CacheDty = NULL;
_Caches = 0;
_hDrive = CreateFile(path, GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, 0);
if (_hDrive != INVALID_HANDLE_VALUE) {
_boot_sector.BytesPerSector = 512;
if (read_sector(0, (Buffer*)&_boot_sector, 1)) {
_bufl = _boot_sector.BytesPerSector;
_SClus = _boot_sector.SectorsPerCluster;
_bufents = _bufl / sizeof(union DEntry);
}
small_cache();
}
}
static int read_vcd(bgav_input_context_t* ctx,
uint8_t * buffer, int len)
{
int bytes_read = 0;
int bytes_to_copy;
vcd_priv * priv;
priv = ctx->priv;
while(bytes_read < len)
{
if(priv->buffer_ptr - priv->buffer >= SECTOR_SIZE)
{
if(!read_sector(ctx, priv->sector))
return bytes_read;
}
if(len - bytes_read < SECTOR_SIZE - (priv->buffer_ptr - priv->buffer))
bytes_to_copy = len - bytes_read;
else
bytes_to_copy = SECTOR_SIZE - (priv->buffer_ptr - priv->buffer);
memcpy(buffer + bytes_read, priv->buffer_ptr, bytes_to_copy);
priv->buffer_ptr += bytes_to_copy;
bytes_read += bytes_to_copy;
}
return bytes_read;
}
int getRootSize()
{
int done = 0;
int currentSector = 19;
int sectorsRead = 0;
ubyte* image;
while (done != 1) {
image = (ubyte*)malloc(BYTES_PER_SECTOR * sizeof(ubyte));
read_sector(currentSector, image);
for (int i = 0; i < 16; i++) {
if (image[i * 32] == 0x00) {
done = 1;
break;
}
}
sectorsRead++;
currentSector++;
free(image);
}
return sectorsRead;
}
uint32_t
get_vdit_size(int fd, uint32_t secno)
{
uint8_t sector[VDM_BLOCK_SIZE];
struct vdit_block_header *hdr;
uint32_t cursize = 0;
int kind = VDIT_BLOCK_HEAD_BE;
for (;;) {
read_sector(fd, secno, sector);
hdr = (struct vdit_block_header *)sector;
if (VDM_ID_KIND(&hdr->id) != kind) {
printf("unexpected VDIT block kind "
"on sector %08x: %02x\n",
secno, VDM_ID_KIND(&hdr->id));
return 0;
}
if (verbose)
printf("sector %08x: vdit frag type %02x, length %04x, "
"next frag at %08x\n",
secno, VDM_ID_KIND(&hdr->id),
betoh16(hdr->chunksz), secno);
cursize += betoh16(hdr->chunksz);
if (betoh32(hdr->nextblk) == VDM_NO_BLK_NUMBER)
break;
secno = betoh32(hdr->nextblk);
kind = VDIT_PORTION_HEADER_BLOCK;
}
return cursize;
}
uint8_t *
append_vdit_portion(int fd, uint32_t secno, uint8_t *buf, uint8_t *sector,
int kind)
{
struct vdit_block_header *hdr;
u_int chunksz;
hdr = (struct vdit_block_header *)sector;
if (VDM_ID_KIND(&hdr->id) != kind) {
printf("unexpected block kind on sector %08x: %02x\n",
secno, VDM_ID_KIND(&hdr->id));
return NULL;
}
/* store first sector of the portion */
chunksz = betoh16(hdr->chunksz);
buf = append_vdit_sector(secno, buf, sector, kind);
chunksz--;
secno++;
/* do the others */
while (chunksz-- != 0) {
read_sector(fd, secno, sector);
buf = append_vdit_sector(secno, buf, sector, VDIT_BLOCK);
if (buf == NULL)
return NULL;
secno++;
}
return buf;
}
static int decode_C7(void)
{
if( !read_sector(fin) )
return 0;
if( !write_sector(fout) )
return 0;
return 1;
}
int main(int argc, char **argv)
{
unsigned int i;
unsigned char buffer[HDA_SECTORSIZE];
unsigned int cylinder;
unsigned int sector;
if(argc < 3) {
fprintf(stderr, "Error arguments missing\n");
exit(EXIT_FAILURE);
}
cylinder = atoi(argv[1]);
sector = atoi(argv[2]);
if(cylinder < 0 || cylinder >= HDA_MAXCYLINDER) {
fprintf(stderr, "Error cylinder\n");
exit(EXIT_FAILURE);
}
if(sector < 0 || sector >= HDA_MAXSECTOR) {
fprintf(stderr, "Error sector\n");
exit(EXIT_FAILURE);
}
/* init hardware */
if(init_hardware("hardware.ini") == 0) {
fprintf(stderr, "Error in hardware initialization\n");
exit(EXIT_FAILURE);
}
/* Interreupt handlers */
for(i=0; i<16; i++)
IRQVECTOR[i] = empty_it;
/* Allows all IT */
_mask(1);
read_sector(cylinder, sector, buffer);
printf("--------------------------------------------------------------------------------\n");
printf("Cylindre %i | Secteur %i\n", cylinder, sector);
printf("--------------------------------------------------------------------------------");
for(i = 0; i < HDA_SECTORSIZE; i++)
{
if(i%8 == 0) {
printf("\n");
}
printf("\t0x%x ",buffer[i]);
}
printf("\n");
printf("--------------------------------------------------------------------------------\n");
/* and exit! */
exit(EXIT_SUCCESS);
}
/* Allocate a buffer and read a partition table sector */
static void read_pte(struct fdisk_context *cxt, int pno, sector_t offset)
{
struct pte *pe = &ptes[pno];
pe->offset = offset;
pe->sectorbuffer = xmalloc(cxt->sector_size);
read_sector(cxt, offset, pe->sectorbuffer);
pe->changed = 0;
pe->part_table = pe->ext_pointer = NULL;
}
void read_bloc(const unsigned int vol,
const unsigned int nbloc,
unsigned char* buffer) {
unsigned int secteur, cylindre;
calc_secteur_cylindre(vol, nbloc, §eur, &cylindre);
read_sector(cylindre, secteur, buffer);
}
int load_fs(struct fs *the_fs)
{
size_t size = sizeof(struct fs);
char *data = malloc(sizeof(char) * size);
size_t offset = 0;
int cur_sect = 0;
for(int i = 0; i < size / BYTES_PER_SECTOR; ++i) {
read_sector(0, cur_sect, data + offset);
cur_sect++;
offset += BYTES_PER_SECTOR;
}
char leftover[BYTES_PER_SECTOR];
read_sector(0, cur_sect, leftover);
memcpy(data, leftover, size - offset);
memcpy(the_fs, data, size);
free(data);
return 0;
}
ubyte* readFatTable(int fatTableSize,int numFatSectors,int bytesPerSector)
{
ubyte* fat = malloc(fatTableSize);
for (int i = 0; i < numFatSectors; i++)
{
read_sector(i + 1, &fat[i * bytesPerSector]);
}
return fat;
}
u_int32 identify_fs ( ){
int8 buf[512];
u_int32 status=read_sector(SUPERBLOCK_START,buf);
if(status==FALSE)
return FALSE;
else
{
memcpy8(buf,(u_int8*)&superBlock,SUPERBLOCK_SIZE);
return TRUE;
}
}
static void* readThreadRun(void* args) {
while(1) {
struct voucher* v = (struct voucher*) blockingReadBB(readVoucherBuffer);
int status = read_sector(diskDevice, &(v->sector));
pthread_mutex_lock(&(v->voucherMutex));
v->status = status;
pthread_cond_signal(&(v->voucherCond));
pthread_mutex_unlock(&(v->voucherMutex));
}
pthread_exit(NULL);
}
void read_directory(int sector, int len)
{
int ptr = 0;
unsigned char *sector_buffer = (unsigned char*)memalign(32,2048);
read_sector(sector_buffer, sector);
files = 0;
memset(DVDToc,0,sizeof(file_entries));
while (len > 0)
{
ptr += read_direntry(sector_buffer + ptr);
if (ptr >= 2048 || !sector_buffer[ptr])
{
len -= 2048;
sector++;
read_sector(sector_buffer, sector);
ptr = 0;
}
}
free(sector_buffer);
}
int sdhc_check(void)
{
unsigned char buffer[512];
sdhc=0;
// Force early detection of old vs new uart monitor
if (onceOnly) slow_write(fd,"r\r",2,2500);
onceOnly=0;
int r0=read_sector(0,buffer,1);
int r1=read_sector(1,buffer,1);
int r200=read_sector(0x200,buffer,1);
// printf("%d %d %d\n",r0,r1,r200);
if (r0||r200) {
fprintf(stderr,"Could not detect SD/SDHC card\n");
exit(-3);
}
sdhc=r1;
return sdhc;
}
void mem_map()
{
int cyl, sect;
int blank[BYTES_PER_SECTOR+1] = {0};
for(cyl = 1; cyl < CYLINDERS; ++cyl) {
for(sect = 0; sect < SECTORS_PER_CYLINDER; ++sect) {
char data[BYTES_PER_SECTOR];
read_sector(cyl, sect, data);
printf("Cylinder: %d\nSector: %d\n\tData: %s\n\n", cyl, sect, data);
}
}
}
void main(void)
{
int i, j, k;
unsigned int base = 0x8000;
unsigned int server_a_base = 0x2000;
unsigned int server_b_base = 0x3000;
prints("Bootloader:\r\n");
prints(" Loading #2..#129 sectors into M[0x8000:0x0000].");
for(i = 0;i < 128; i++)
{
if((i &63) == 0)
prints("\r\n ");
read_sector(i+2, base, 0);
base += 32;
prints(".");
}
prints("Done. \r\n");
prints(" Loading #130..#257 sectors into M[0x2000:0x0000].");
for(j = 0;j < 128;j++)
{
if((j &63) == 0)
prints("\r\n ");
read_sector(j+2+128, server_a_base, 0);
server_a_base += 32;
prints(".");
}
prints("done. \r\n");
prints(" Loading #258..# sectors into M[0x3000:0x0000].");
for( k= 0;k < 128;k++)
{
if((k &63) == 0)
prints("\r\n ");
read_sector(k+2+256, server_b_base, 0);
server_b_base += 32;
prints(".");
}
prints("done. \r\n");
}
/* Allocate a buffer and read a partition table sector */
static void read_pte(struct fdisk_context *cxt, int pno, sector_t offset)
{
struct pte *pe = &ptes[pno];
pe->offset = offset;
pe->sectorbuffer = xcalloc(1, cxt->sector_size);
if (read_sector(cxt, offset, pe->sectorbuffer) != 0)
fprintf(stderr, _("Failed to read extended partition table (offset=%jd)\n"),
(uintmax_t) offset);
pe->changed = 0;
pe->part_table = pe->ext_pointer = NULL;
}