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Bochs/bochs/iodev/cdrom.cc
Volker Ruppert 5109a7e679 - fixed toc size returned by IOCTL_CDROM_READ_TOC_EX using the size field of toc data 
- prepared read_block() function for block size 2352
- report block number at cdrom read block panic
2005-11-02 20:26:24 +00:00

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/////////////////////////////////////////////////////////////////////////
// $Id: cdrom.cc,v 1.85 2005-11-02 20:26:24 vruppert Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
//
// MandrakeSoft S.A.
// 43, rue d'Aboukir
// 75002 Paris - France
// http://www.linux-mandrake.com/
// http://www.mandrakesoft.com/
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
// These are the low-level CDROM functions which are called
// from 'harddrv.cc'. They effect the OS specific functionality
// needed by the CDROM emulation in 'harddrv.cc'. Mostly, just
// ioctl() calls and such. Should be fairly easy to add support
// for your OS if it is not supported yet.
// Define BX_PLUGGABLE in files that can be compiled into plugins. For
// platforms that require a special tag on exported symbols, BX_PLUGGABLE
// is used to know when we are exporting symbols and when we are importing.
#define BX_PLUGGABLE
#include "bochs.h"
#if BX_SUPPORT_CDROM
#include "cdrom.h"
#define LOG_THIS /* no SMF tricks here, not needed */
extern "C" {
#include <errno.h>
}
#ifdef __linux__
extern "C" {
#include <sys/ioctl.h>
#include <linux/cdrom.h>
// I use the framesize in non OS specific code too
#define BX_CD_FRAMESIZE CD_FRAMESIZE
}
#elif defined(__GNU__) || (defined(__CYGWIN32__) && !defined(WIN32))
extern "C" {
#include <sys/ioctl.h>
#define BX_CD_FRAMESIZE 2048
#define CD_FRAMESIZE 2048
}
#elif BX_WITH_MACOS
#define BX_CD_FRAMESIZE 2048
#define CD_FRAMESIZE 2048
#elif defined(__sun)
extern "C" {
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/cdio.h>
#define BX_CD_FRAMESIZE CDROM_BLK_2048
}
#elif defined(__DJGPP__)
extern "C" {
#include <sys/ioctl.h>
#define BX_CD_FRAMESIZE 2048
#define CD_FRAMESIZE 2048
}
#elif defined(__BEOS__)
#include "cdrom_beos.h"
#define BX_CD_FRAMESIZE 2048
#elif (defined(__NetBSD__) || defined(__NetBSD_kernel__) || defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__))
// OpenBSD pre version 2.7 may require extern "C" { } structure around
// all the includes, because the i386 sys/disklabel.h contains code which
// c++ considers invalid.
#include <sys/types.h>
#include <sys/param.h>
#include <sys/file.h>
#include <sys/cdio.h>
#include <sys/ioctl.h>
#include <sys/disklabel.h>
// ntohl(x) et al have been moved out of sys/param.h in FreeBSD 5
#include <netinet/in.h>
// XXX
#define BX_CD_FRAMESIZE 2048
#define CD_FRAMESIZE 2048
#elif defined(__APPLE__)
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#if defined (__GNUC__) && ( __GNUC__ >= 4 )
#include <sys/disk.h>
#else
#include <dev/disk.h>
#endif
#include <errno.h>
#include <paths.h>
#include <sys/param.h>
#define Float32 KLUDGE_Float32
#define Float64 KLUDGE_Float64
#include <IOKit/IOKitLib.h>
#include <IOKit/IOBSD.h>
#include <IOKit/storage/IOCDMedia.h>
#include <IOKit/storage/IOMedia.h>
#include <IOKit/storage/IOCDTypes.h>
#include <CoreFoundation/CoreFoundation.h>
#undef Float32
#undef Float64
// These definitions were taken from mount_cd9660.c
// There are some similar definitions in IOCDTypes.h
// however there seems to be some dissagreement in
// the definition of CDTOC.length
struct _CDMSF {
u_char minute;
u_char second;
u_char frame;
};
#define MSF_TO_LBA(msf) \
(((((msf).minute * 60UL) + (msf).second) * 75UL) + (msf).frame - 150)
struct _CDTOC_Desc {
u_char session;
u_char ctrl_adr; /* typed to be machine and compiler independent */
u_char tno;
u_char point;
struct _CDMSF address;
u_char zero;
struct _CDMSF p;
};
struct _CDTOC {
u_short length; /* in native cpu endian */
u_char first_session;
u_char last_session;
struct _CDTOC_Desc trackdesc[1];
};
static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator, mach_port_t *masterPort );
static kern_return_t GetDeviceFilePath( io_iterator_t mediaIterator, char *deviceFilePath, CFIndex maxPathSize );
//int OpenDrive( const char *deviceFilePath );
static struct _CDTOC * ReadTOC( const char * devpath );
static char CDDevicePath[ MAXPATHLEN ];
#define BX_CD_FRAMESIZE 2048
#define CD_FRAMESIZE 2048
#elif defined(WIN32)
// windows.h included by bochs.h
#include <winioctl.h>
#include "aspi-win32.h"
#include "scsidefs.h"
DWORD (*GetASPI32SupportInfo)(void);
DWORD (*SendASPI32Command)(LPSRB);
BOOL (*GetASPI32Buffer)(PASPI32BUFF);
BOOL (*FreeASPI32Buffer)(PASPI32BUFF);
BOOL (*TranslateASPI32Address)(PDWORD,PDWORD);
DWORD (*GetASPI32DLLVersion)(void);
static OSVERSIONINFO osinfo;
static BOOL isWindowsXP;
static BOOL bHaveDev;
static UINT cdromCount = 0;
static HINSTANCE hASPI = NULL;
#define BX_CD_FRAMESIZE 2048
#define CD_FRAMESIZE 2048
// READ_TOC_EX structure(s) and #defines
#define CDROM_READ_TOC_EX_FORMAT_TOC 0x00
#define CDROM_READ_TOC_EX_FORMAT_SESSION 0x01
#define CDROM_READ_TOC_EX_FORMAT_FULL_TOC 0x02
#define CDROM_READ_TOC_EX_FORMAT_PMA 0x03
#define CDROM_READ_TOC_EX_FORMAT_ATIP 0x04
#define CDROM_READ_TOC_EX_FORMAT_CDTEXT 0x05
#define IOCTL_CDROM_BASE FILE_DEVICE_CD_ROM
#define IOCTL_CDROM_READ_TOC_EX CTL_CODE(IOCTL_CDROM_BASE, 0x0015, METHOD_BUFFERED, FILE_READ_ACCESS)
#define IOCTL_DISK_GET_LENGTH_INFO CTL_CODE(IOCTL_DISK_BASE, 0x0017, METHOD_BUFFERED, FILE_READ_ACCESS)
typedef struct _CDROM_READ_TOC_EX {
UCHAR Format : 4;
UCHAR Reserved1 : 3; // future expansion
UCHAR Msf : 1;
UCHAR SessionTrack;
UCHAR Reserved2; // future expansion
UCHAR Reserved3; // future expansion
} CDROM_READ_TOC_EX, *PCDROM_READ_TOC_EX;
typedef struct _TRACK_DATA {
UCHAR Reserved;
UCHAR Control : 4;
UCHAR Adr : 4;
UCHAR TrackNumber;
UCHAR Reserved1;
UCHAR Address[4];
} TRACK_DATA, *PTRACK_DATA;
typedef struct _CDROM_TOC_SESSION_DATA {
// Header
UCHAR Length[2]; // add two bytes for this field
UCHAR FirstCompleteSession;
UCHAR LastCompleteSession;
// One track, representing the first track
// of the last finished session
TRACK_DATA TrackData[1];
} CDROM_TOC_SESSION_DATA, *PCDROM_TOC_SESSION_DATA;
// End READ_TOC_EX structure(s) and #defines
#else // all others (Irix, Tru64)
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#define BX_CD_FRAMESIZE 2048
#define CD_FRAMESIZE 2048
#endif
#include <stdio.h>
#ifdef __APPLE__
static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator,
mach_port_t *masterPort )
{
kern_return_t kernResult;
CFMutableDictionaryRef classesToMatch;
kernResult = IOMasterPort( bootstrap_port, masterPort );
if ( kernResult != KERN_SUCCESS )
{
fprintf ( stderr, "IOMasterPort returned %d\n", kernResult );
return kernResult;
}
// CD media are instances of class kIOCDMediaClass.
classesToMatch = IOServiceMatching( kIOCDMediaClass );
if ( classesToMatch == NULL )
fprintf ( stderr, "IOServiceMatching returned a NULL dictionary.\n" );
else
{
// Each IOMedia object has a property with key kIOMediaEjectableKey
// which is true if the media is indeed ejectable. So add property
// to CFDictionary for matching.
CFDictionarySetValue( classesToMatch,
CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
}
kernResult = IOServiceGetMatchingServices( *masterPort,
classesToMatch, mediaIterator );
if ( (kernResult != KERN_SUCCESS) || (*mediaIterator == NULL) )
fprintf( stderr, "No ejectable CD media found.\n kernResult = %d\n", kernResult );
return kernResult;
}
static kern_return_t GetDeviceFilePath( io_iterator_t mediaIterator,
char *deviceFilePath, CFIndex maxPathSize )
{
io_object_t nextMedia;
kern_return_t kernResult = KERN_FAILURE;
nextMedia = IOIteratorNext( mediaIterator );
if ( nextMedia == NULL )
{
*deviceFilePath = '\0';
}
else
{
CFTypeRef deviceFilePathAsCFString;
deviceFilePathAsCFString = IORegistryEntryCreateCFProperty(
nextMedia, CFSTR( kIOBSDNameKey ),
kCFAllocatorDefault, 0 );
*deviceFilePath = '\0';
if ( deviceFilePathAsCFString )
{
size_t devPathLength = strlen( _PATH_DEV );
strcpy( deviceFilePath, _PATH_DEV );
if ( CFStringGetCString( (const __CFString *) deviceFilePathAsCFString,
deviceFilePath + devPathLength,
maxPathSize - devPathLength,
kCFStringEncodingASCII ) )
{
// fprintf( stderr, "BSD path: %s\n", deviceFilePath );
kernResult = KERN_SUCCESS;
}
CFRelease( deviceFilePathAsCFString );
}
}
IOObjectRelease( nextMedia );
return kernResult;
}
static int OpenDrive( const char *deviceFilePath )
{
int fileDescriptor;
fileDescriptor = open( deviceFilePath, O_RDONLY );
if ( fileDescriptor == -1 )
fprintf( stderr, "Error %d opening device %s.\n", errno, deviceFilePath );
return fileDescriptor;
}
static struct _CDTOC * ReadTOC( const char * devpath ) {
struct _CDTOC * toc_p = NULL;
io_iterator_t iterator = 0;
io_registry_entry_t service = 0;
CFDictionaryRef properties = 0;
CFDataRef data = 0;
mach_port_t port = 0;
char * devname;
if (( devname = strrchr( devpath, '/' )) != NULL ) {
++devname;
}
else {
devname = (char *) devpath;
}
if ( IOMasterPort(bootstrap_port, &port ) != KERN_SUCCESS ) {
fprintf( stderr, "IOMasterPort failed\n" );
goto Exit;
}
if ( IOServiceGetMatchingServices( port, IOBSDNameMatching( port, 0, devname ),
&iterator ) != KERN_SUCCESS ) {
fprintf( stderr, "IOServiceGetMatchingServices failed\n" );
goto Exit;
}
service = IOIteratorNext( iterator );
IOObjectRelease( iterator );
iterator = 0;
while ( service && !IOObjectConformsTo( service, "IOCDMedia" )) {
if ( IORegistryEntryGetParentIterator( service, kIOServicePlane,
&iterator ) != KERN_SUCCESS ) {
fprintf( stderr, "IORegistryEntryGetParentIterator failed\n" );
goto Exit;
}
IOObjectRelease( service );
service = IOIteratorNext( iterator );
IOObjectRelease( iterator );
}
if ( service == NULL ) {
fprintf( stderr, "CD media not found\n" );
goto Exit;
}
if ( IORegistryEntryCreateCFProperties( service, (__CFDictionary **) &properties,
kCFAllocatorDefault,
kNilOptions ) != KERN_SUCCESS ) {
fprintf( stderr, "IORegistryEntryGetParentIterator failed\n" );
goto Exit;
}
data = (CFDataRef) CFDictionaryGetValue( properties, CFSTR(kIOCDMediaTOCKey) );
if ( data == NULL ) {
fprintf( stderr, "CFDictionaryGetValue failed\n" );
goto Exit;
}
else {
CFRange range;
CFIndex buflen;
buflen = CFDataGetLength( data ) + 1;
range = CFRangeMake( 0, buflen );
toc_p = (struct _CDTOC *) malloc( buflen );
if ( toc_p == NULL ) {
fprintf( stderr, "Out of memory\n" );
goto Exit;
}
else {
CFDataGetBytes( data, range, (unsigned char *) toc_p );
}
/*
fprintf( stderr, "Table of contents\n length %d first %d last %d\n",
toc_p->length, toc_p->first_session, toc_p->last_session );
*/
CFRelease( properties );
}
Exit:
if ( service ) {
IOObjectRelease( service );
}
return toc_p;
}
#endif
#ifdef WIN32
bool ReadCDSector(unsigned int hid, unsigned int tid, unsigned int lun, unsigned long frame, unsigned char *buf, int bufsize)
{
HANDLE hEventSRB;
SRB_ExecSCSICmd srb;
DWORD dwStatus;
hEventSRB = CreateEvent(NULL, TRUE, FALSE, NULL);
memset(&srb,0,sizeof(SRB_ExecSCSICmd));
srb.SRB_Cmd = SC_EXEC_SCSI_CMD;
srb.SRB_HaId = hid;
srb.SRB_Target = tid;
srb.SRB_Lun = lun;
srb.SRB_Flags = SRB_DIR_IN | SRB_EVENT_NOTIFY;
srb.SRB_SenseLen = SENSE_LEN;
srb.SRB_PostProc = hEventSRB;
srb.SRB_BufPointer = buf;
srb.SRB_BufLen = bufsize;
srb.SRB_CDBLen = 10;
srb.CDBByte[0] = SCSI_READ10;
srb.CDBByte[2] = (unsigned char) (frame>>24);
srb.CDBByte[3] = (unsigned char) (frame>>16);
srb.CDBByte[4] = (unsigned char) (frame>>8);
srb.CDBByte[5] = (unsigned char) (frame);
srb.CDBByte[7] = 0;
srb.CDBByte[8] = 1; /* read 1 frames */
ResetEvent(hEventSRB);
dwStatus = SendASPI32Command((SRB *)&srb);
if(dwStatus == SS_PENDING) {
WaitForSingleObject(hEventSRB, 100000);
}
CloseHandle(hEventSRB);
return (srb.SRB_TargStat == STATUS_GOOD);
}
int GetCDCapacity(unsigned int hid, unsigned int tid, unsigned int lun)
{
HANDLE hEventSRB;
SRB_ExecSCSICmd srb;
DWORD dwStatus;
unsigned char buf[8];
hEventSRB = CreateEvent(NULL, TRUE, FALSE, NULL);
memset(&buf, 0, sizeof(buf));
memset(&srb,0,sizeof(SRB_ExecSCSICmd));
srb.SRB_Cmd = SC_EXEC_SCSI_CMD;
srb.SRB_HaId = hid;
srb.SRB_Target = tid;
srb.SRB_Lun = lun;
srb.SRB_Flags = SRB_DIR_IN | SRB_EVENT_NOTIFY;
srb.SRB_SenseLen = SENSE_LEN;
srb.SRB_PostProc = hEventSRB;
srb.SRB_BufPointer = (unsigned char *)buf;
srb.SRB_BufLen = 8;
srb.SRB_CDBLen = 10;
srb.CDBByte[0] = SCSI_READCDCAP;
srb.CDBByte[2] = 0;
srb.CDBByte[3] = 0;
srb.CDBByte[4] = 0;
srb.CDBByte[5] = 0;
srb.CDBByte[8] = 0;
ResetEvent(hEventSRB);
dwStatus = SendASPI32Command((SRB *)&srb);
if(dwStatus == SS_PENDING) {
WaitForSingleObject(hEventSRB, 100000);
}
CloseHandle(hEventSRB);
return ((buf[0] << 24) + (buf[1] << 16) + (buf[2] << 8) + buf[3]) * ((buf[4] << 24) + (buf[5] << 16) + (buf[6] << 8) + buf[7]);
}
#endif
cdrom_interface::cdrom_interface(char *dev)
{
put("CD");
settype(CDLOG);
fd = -1; // File descriptor not yet allocated
if (dev == NULL) {
path = NULL;
} else {
path = strdup(dev);
}
using_file=0;
#ifdef WIN32
bUseASPI = FALSE;
osinfo.dwOSVersionInfoSize = sizeof(osinfo);
GetVersionEx(&osinfo);
isWindowsXP = (osinfo.dwMajorVersion >= 5) && (osinfo.dwMinorVersion >= 1);
#endif
}
void
cdrom_interface::init(void) {
BX_DEBUG(("Init $Id: cdrom.cc,v 1.85 2005-11-02 20:26:24 vruppert Exp $"));
BX_INFO(("file = '%s'",path));
}
cdrom_interface::~cdrom_interface(void)
{
#ifdef WIN32
#else
if (fd >= 0)
close(fd);
#endif
if (path)
free(path);
BX_DEBUG(("Exit"));
}
bx_bool
cdrom_interface::insert_cdrom(char *dev)
{
unsigned char buffer[BX_CD_FRAMESIZE];
#ifndef WIN32
ssize_t ret;
#endif
// Load CD-ROM. Returns 0 if CD is not ready.
if (dev != NULL) path = strdup(dev);
BX_INFO (("load cdrom with path=%s", path));
#ifdef WIN32
char drive[256];
if ( (path[1] == ':') && (strlen(path) == 2) )
{
if(osinfo.dwPlatformId == VER_PLATFORM_WIN32_NT) {
// Use direct device access under windows NT/2k/XP
// With all the backslashes it's hard to see, but to open D: drive
// the name would be: \\.\d:
sprintf(drive, "\\\\.\\%s", path);
BX_INFO (("Using direct access for cdrom."));
// This trick only works for Win2k and WinNT, so warn the user of that.
} else {
BX_INFO(("Using ASPI for cdrom. Drive letters are unused yet."));
bUseASPI = TRUE;
}
using_file = 0;
}
else
{
strcpy(drive,path);
using_file = 1;
BX_INFO (("Opening image file as a cd"));
}
if(bUseASPI) {
DWORD d;
UINT cdr, cnt, max;
UINT i, j, k;
SRB_HAInquiry sh;
SRB_GDEVBlock sd;
if (!hASPI) {
hASPI = LoadLibrary("WNASPI32.DLL");
if (hASPI) {
SendASPI32Command = (DWORD(*)(LPSRB))GetProcAddress( hASPI, "SendASPI32Command" );
GetASPI32DLLVersion = (DWORD(*)(void))GetProcAddress( hASPI, "GetASPI32DLLVersion" );
GetASPI32SupportInfo = (DWORD(*)(void))GetProcAddress( hASPI, "GetASPI32SupportInfo" );
d = GetASPI32DLLVersion();
BX_INFO(("WNASPI32.DLL version %d.%02d initialized", d & 0xff, (d >> 8) & 0xff));
} else {
BX_PANIC(("Could not load ASPI drivers, so cdrom access will fail"));
return 0;
}
}
cdr = 0;
bHaveDev = FALSE;
d = GetASPI32SupportInfo();
cnt = LOBYTE(LOWORD(d));
for(i = 0; i < cnt; i++) {
memset(&sh, 0, sizeof(sh));
sh.SRB_Cmd = SC_HA_INQUIRY;
sh.SRB_HaId = i;
SendASPI32Command((LPSRB)&sh);
if(sh.SRB_Status != SS_COMP)
continue;
max = (int)sh.HA_Unique[3];
for(j = 0; j < max; j++) {
for(k = 0; k < 8; k++) {
memset(&sd, 0, sizeof(sd));
sd.SRB_Cmd = SC_GET_DEV_TYPE;
sd.SRB_HaId = i;
sd.SRB_Target = j;
sd.SRB_Lun = k;
SendASPI32Command((LPSRB)&sd);
if(sd.SRB_Status == SS_COMP) {
if(sd.SRB_DeviceType == DTYPE_CDROM) {
cdr++;
if(cdr > cdromCount) {
hid = i;
tid = j;
lun = k;
cdromCount++;
bHaveDev = TRUE;
}
}
}
if(bHaveDev) break;
}
if(bHaveDev) break;
}
}
fd=1;
} else {
hFile=CreateFile((char *)&drive, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, NULL);
if (hFile !=(void *)0xFFFFFFFF)
fd=1;
if (!using_file) {
DWORD lpBytesReturned;
DeviceIoControl(hFile, IOCTL_STORAGE_LOAD_MEDIA, NULL, 0, NULL, 0, &lpBytesReturned, NULL);
}
}
#elif defined(__APPLE__)
if(strcmp(path, "drive") == 0)
{
mach_port_t masterPort = NULL;
io_iterator_t mediaIterator;
kern_return_t kernResult;
BX_INFO(( "Insert CDROM" ));
kernResult = FindEjectableCDMedia( &mediaIterator, &masterPort );
if ( kernResult != KERN_SUCCESS ) {
BX_INFO (("Unable to find CDROM"));
return 0;
}
kernResult = GetDeviceFilePath( mediaIterator, CDDevicePath, sizeof( CDDevicePath ) );
if ( kernResult != KERN_SUCCESS ) {
BX_INFO (("Unable to get CDROM device file path" ));
return 0;
}
// Here a cdrom was found so see if we can read from it.
// At this point a failure will result in panic.
if ( strlen( CDDevicePath ) ) {
fd = open(CDDevicePath, O_RDONLY);
}
}
else
{
fd = open(path, O_RDONLY);
}
#else
// all platforms except win32
fd = open(path, O_RDONLY);
#endif
if (fd < 0) {
BX_ERROR(( "open cd failed for %s: %s", path, strerror(errno)));
return 0;
}
#ifndef WIN32
// do fstat to determine if it's a file or a device, then set using_file.
struct stat stat_buf;
ret = fstat (fd, &stat_buf);
if (ret) {
BX_PANIC (("fstat cdrom file returned error: %s", strerror (errno)));
}
if (S_ISREG (stat_buf.st_mode)) {
using_file = 1;
BX_INFO (("Opening image file %s as a cd.", path));
} else {
using_file = 0;
BX_INFO (("Using direct access for cdrom."));
}
#endif
// I just see if I can read a sector to verify that a
// CD is in the drive and readable.
return read_block(buffer, 0, 2048);
}
bx_bool
cdrom_interface::start_cdrom()
{
// Spin up the cdrom drive.
if (fd >= 0) {
#if defined(__NetBSD__) || defined(__NetBSD_kernel__)
if (ioctl (fd, CDIOCSTART) < 0)
BX_DEBUG(( "start_cdrom: start returns error: %s", strerror (errno) ));
return 1;
#else
BX_INFO(("start_cdrom: your OS is not supported yet."));
return 0; // OS not supported yet, return 0 always.
#endif
}
return 0;
}
void
cdrom_interface::eject_cdrom()
{
// Logically eject the CD. I suppose we could stick in
// some ioctl() calls to really eject the CD as well.
if (fd >= 0) {
#if (defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__))
(void) ioctl (fd, CDIOCALLOW);
if (ioctl (fd, CDIOCEJECT) < 0)
BX_DEBUG(( "eject_cdrom: eject returns error." ));
#endif
#ifdef WIN32
if (using_file == 0)
{
if(bUseASPI) {
} else {
DWORD lpBytesReturned;
DeviceIoControl(hFile, IOCTL_STORAGE_EJECT_MEDIA, NULL, 0, NULL, 0, &lpBytesReturned, NULL);
}
}
#else // WIN32
#if __linux__
if (!using_file)
ioctl (fd, CDROMEJECT, NULL);
#endif
close(fd);
#endif // WIN32
fd = -1;
}
}
bx_bool
cdrom_interface::read_toc(Bit8u* buf, int* length, bx_bool msf, int start_track, int format)
{
unsigned i;
// Read CD TOC. Returns 0 if start track is out of bounds.
if (fd < 0) {
BX_PANIC(("cdrom: read_toc: file not open."));
return 0;
}
// This is a hack and works okay if there's one rom track only
#if defined(WIN32)
if (!isWindowsXP || using_file) {
#else
if (using_file || (format != 0)) {
#endif
Bit32u blocks;
int len = 4;
switch (format) {
case 0:
// From atapi specs : start track can be 0-63, AA
if ((start_track > 1) && (start_track != 0xaa))
return 0;
buf[2] = 1;
buf[3] = 1;
if (start_track <= 1) {
buf[len++] = 0; // Reserved
buf[len++] = 0x14; // ADR, control
buf[len++] = 1; // Track number
buf[len++] = 0; // Reserved
// Start address
if (msf) {
buf[len++] = 0; // reserved
buf[len++] = 0; // minute
buf[len++] = 2; // second
buf[len++] = 0; // frame
} else {
buf[len++] = 0;
buf[len++] = 0;
buf[len++] = 0;
buf[len++] = 0; // logical sector 0
}
}
// Lead out track
buf[len++] = 0; // Reserved
buf[len++] = 0x16; // ADR, control
buf[len++] = 0xaa; // Track number
buf[len++] = 0; // Reserved
blocks = capacity();
// Start address
if (msf) {
buf[len++] = 0; // reserved
buf[len++] = (Bit8u)(((blocks + 150) / 75) / 60); // minute
buf[len++] = (Bit8u)(((blocks + 150) / 75) % 60); // second
buf[len++] = (Bit8u)((blocks + 150) % 75); // frame;
} else {
buf[len++] = (blocks >> 24) & 0xff;
buf[len++] = (blocks >> 16) & 0xff;
buf[len++] = (blocks >> 8) & 0xff;
buf[len++] = (blocks >> 0) & 0xff;
}
buf[0] = ((len-2) >> 8) & 0xff;
buf[1] = (len-2) & 0xff;
break;
case 1:
// multi session stuff - emulate a single session only
buf[0] = 0;
buf[1] = 0x0a;
buf[2] = 1;
buf[3] = 1;
for (i = 0; i < 8; i++)
buf[4+i] = 0;
len = 12;
break;
case 2:
// raw toc - emulate a single session only (ported from qemu)
buf[2] = 1;
buf[3] = 1;
for (i = 0; i < 4; i++) {
buf[len++] = 1;
buf[len++] = 0x14;
buf[len++] = 0;
if (i < 3) {
buf[len++] = 0xa0 + i;
} else {
buf[len++] = 1;
}
buf[len++] = 0;
buf[len++] = 0;
buf[len++] = 0;
if (i < 2) {
buf[len++] = 0;
buf[len++] = 1;
buf[len++] = 0;
buf[len++] = 0;
} else if (i == 2) {
blocks = capacity();
if (msf) {
buf[len++] = 0; // reserved
buf[len++] = (Bit8u)(((blocks + 150) / 75) / 60); // minute
buf[len++] = (Bit8u)(((blocks + 150) / 75) % 60); // second
buf[len++] = (Bit8u)((blocks + 150) % 75); // frame;
} else {
buf[len++] = (blocks >> 24) & 0xff;
buf[len++] = (blocks >> 16) & 0xff;
buf[len++] = (blocks >> 8) & 0xff;
buf[len++] = (blocks >> 0) & 0xff;
}
} else {
buf[len++] = 0;
buf[len++] = 0;
buf[len++] = 0;
buf[len++] = 0;
}
}
buf[0] = ((len-2) >> 8) & 0xff;
buf[1] = (len-2) & 0xff;
break;
default:
BX_PANIC(("cdrom: read_toc: unknown format"));
return 0;
}
*length = len;
return 1;
}
// all these implementations below are the platform-dependent code required
// to read the TOC from a physical cdrom.
#ifdef WIN32
if (isWindowsXP)
{
// This only works with WinXP
CDROM_READ_TOC_EX input;
memset(&input, 0, sizeof(input));
input.Format = format;
input.Msf = msf;
input.SessionTrack = start_track;
// We have to allocate a chunk of memory to make sure it is aligned on a sector base.
UCHAR *data = (UCHAR *) VirtualAlloc(NULL, 2048*2, MEM_COMMIT|MEM_RESERVE, PAGE_READWRITE);
unsigned long iBytesReturned;
DeviceIoControl(hFile, IOCTL_CDROM_READ_TOC_EX, &input, sizeof(input), data, 804, &iBytesReturned, NULL);
// now copy it to the users buffer and free our buffer
*length = data[1] + (data[0] << 8) + 2;
memcpy(buf, data, *length);
VirtualFree(data, 0, MEM_RELEASE);
return 1;
} else {
return 0;
}
#elif __linux__ || defined(__sun)
{
struct cdrom_tochdr tochdr;
if (ioctl(fd, CDROMREADTOCHDR, &tochdr))
BX_PANIC(("cdrom: read_toc: READTOCHDR failed."));
if ((start_track > tochdr.cdth_trk1) && (start_track != 0xaa))
return 0;
buf[2] = tochdr.cdth_trk0;
buf[3] = tochdr.cdth_trk1;
if (start_track < tochdr.cdth_trk0)
start_track = tochdr.cdth_trk0;
int len = 4;
for (int i = start_track; i <= tochdr.cdth_trk1; i++) {
struct cdrom_tocentry tocentry;
tocentry.cdte_format = (msf) ? CDROM_MSF : CDROM_LBA;
tocentry.cdte_track = i;
if (ioctl(fd, CDROMREADTOCENTRY, &tocentry))
BX_PANIC(("cdrom: read_toc: READTOCENTRY failed."));
buf[len++] = 0; // Reserved
buf[len++] = (tocentry.cdte_adr << 4) | tocentry.cdte_ctrl ; // ADR, control
buf[len++] = i; // Track number
buf[len++] = 0; // Reserved
// Start address
if (msf) {
buf[len++] = 0; // reserved
buf[len++] = tocentry.cdte_addr.msf.minute;
buf[len++] = tocentry.cdte_addr.msf.second;
buf[len++] = tocentry.cdte_addr.msf.frame;
} else {
buf[len++] = (((unsigned)tocentry.cdte_addr.lba) >> 24) & 0xff;
buf[len++] = (((unsigned)tocentry.cdte_addr.lba) >> 16) & 0xff;
buf[len++] = (((unsigned)tocentry.cdte_addr.lba) >> 8) & 0xff;
buf[len++] = (((unsigned)tocentry.cdte_addr.lba) >> 0) & 0xff;
}
}
// Lead out track
struct cdrom_tocentry tocentry;
tocentry.cdte_format = (msf) ? CDROM_MSF : CDROM_LBA;
#ifdef CDROM_LEADOUT
tocentry.cdte_track = CDROM_LEADOUT;
#else
tocentry.cdte_track = 0xaa;
#endif
if (ioctl(fd, CDROMREADTOCENTRY, &tocentry))
BX_PANIC(("cdrom: read_toc: READTOCENTRY lead-out failed."));
buf[len++] = 0; // Reserved
buf[len++] = (tocentry.cdte_adr << 4) | tocentry.cdte_ctrl ; // ADR, control
buf[len++] = 0xaa; // Track number
buf[len++] = 0; // Reserved
// Start address
if (msf) {
buf[len++] = 0; // reserved
buf[len++] = tocentry.cdte_addr.msf.minute;
buf[len++] = tocentry.cdte_addr.msf.second;
buf[len++] = tocentry.cdte_addr.msf.frame;
} else {
buf[len++] = (((unsigned)tocentry.cdte_addr.lba) >> 24) & 0xff;
buf[len++] = (((unsigned)tocentry.cdte_addr.lba) >> 16) & 0xff;
buf[len++] = (((unsigned)tocentry.cdte_addr.lba) >> 8) & 0xff;
buf[len++] = (((unsigned)tocentry.cdte_addr.lba) >> 0) & 0xff;
}
buf[0] = ((len-2) >> 8) & 0xff;
buf[1] = (len-2) & 0xff;
*length = len;
return 1;
}
#elif (defined(__NetBSD__) || defined(__NetBSD_kernel__) || defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__))
{
struct ioc_toc_header h;
struct ioc_read_toc_entry t;
if (ioctl (fd, CDIOREADTOCHEADER, &h) < 0)
BX_PANIC(("cdrom: read_toc: READTOCHDR failed."));
if ((start_track > h.ending_track) && (start_track != 0xaa))
return 0;
buf[2] = h.starting_track;
buf[3] = h.ending_track;
if (start_track < h.starting_track)
start_track = h.starting_track;
int len = 4;
for (int i = start_track; i <= h.ending_track; i++) {
struct cd_toc_entry tocentry;
t.address_format = (msf) ? CD_MSF_FORMAT : CD_LBA_FORMAT;
t.starting_track = i;
t.data_len = sizeof(tocentry);
t.data = &tocentry;
if (ioctl (fd, CDIOREADTOCENTRYS, &t) < 0)
BX_PANIC(("cdrom: read_toc: READTOCENTRY failed."));
buf[len++] = 0; // Reserved
buf[len++] = (tocentry.addr_type << 4) | tocentry.control ; // ADR, control
buf[len++] = i; // Track number
buf[len++] = 0; // Reserved
// Start address
if (msf) {
buf[len++] = 0; // reserved
buf[len++] = tocentry.addr.msf.minute;
buf[len++] = tocentry.addr.msf.second;
buf[len++] = tocentry.addr.msf.frame;
} else {
buf[len++] = (((unsigned)tocentry.addr.lba) >> 24) & 0xff;
buf[len++] = (((unsigned)tocentry.addr.lba) >> 16) & 0xff;
buf[len++] = (((unsigned)tocentry.addr.lba) >> 8) & 0xff;
buf[len++] = (((unsigned)tocentry.addr.lba) >> 0) & 0xff;
}
}
// Lead out track
struct cd_toc_entry tocentry;
t.address_format = (msf) ? CD_MSF_FORMAT : CD_LBA_FORMAT;
t.starting_track = 0xaa;
t.data_len = sizeof(tocentry);
t.data = &tocentry;
if (ioctl (fd, CDIOREADTOCENTRYS, &t) < 0)
BX_PANIC(("cdrom: read_toc: READTOCENTRY lead-out failed."));
buf[len++] = 0; // Reserved
buf[len++] = (tocentry.addr_type << 4) | tocentry.control ; // ADR, control
buf[len++] = 0xaa; // Track number
buf[len++] = 0; // Reserved
// Start address
if (msf) {
buf[len++] = 0; // reserved
buf[len++] = tocentry.addr.msf.minute;
buf[len++] = tocentry.addr.msf.second;
buf[len++] = tocentry.addr.msf.frame;
} else {
buf[len++] = (((unsigned)tocentry.addr.lba) >> 24) & 0xff;
buf[len++] = (((unsigned)tocentry.addr.lba) >> 16) & 0xff;
buf[len++] = (((unsigned)tocentry.addr.lba) >> 8) & 0xff;
buf[len++] = (((unsigned)tocentry.addr.lba) >> 0) & 0xff;
}
buf[0] = ((len-2) >> 8) & 0xff;
buf[1] = (len-2) & 0xff;
*length = len;
return 1;
}
#elif defined(__APPLE__)
// Read CD TOC. Returns 0 if start track is out of bounds.
#if 1
{
struct _CDTOC * toc = ReadTOC( CDDevicePath );
if ((start_track > toc->last_session) && (start_track != 0xaa))
return 0;
buf[2] = toc->first_session;
buf[3] = toc->last_session;
if (start_track < toc->first_session)
start_track = toc->first_session;
int len = 4;
for (int i = start_track; i <= toc->last_session; i++) {
buf[len++] = 0; // Reserved
buf[len++] = toc->trackdesc[i].ctrl_adr ; // ADR, control
buf[len++] = i; // Track number
buf[len++] = 0; // Reserved
// Start address
if (msf) {
buf[len++] = 0; // reserved
buf[len++] = toc->trackdesc[i].address.minute;
buf[len++] = toc->trackdesc[i].address.second;
buf[len++] = toc->trackdesc[i].address.frame;
} else {
unsigned lba = (unsigned)(MSF_TO_LBA(toc->trackdesc[i].address));
buf[len++] = (lba >> 24) & 0xff;
buf[len++] = (lba >> 16) & 0xff;
buf[len++] = (lba >> 8) & 0xff;
buf[len++] = (lba >> 0) & 0xff;
}
}
// Lead out track
buf[len++] = 0; // Reserved
buf[len++] = 0x16; // ADR, control
buf[len++] = 0xaa; // Track number
buf[len++] = 0; // Reserved
Bit32u blocks = capacity();
// Start address
if (msf) {
buf[len++] = 0; // reserved
buf[len++] = (Bit8u)(((blocks + 150) / 75) / 60); // minute
buf[len++] = (Bit8u)(((blocks + 150) / 75) % 60); // second
buf[len++] = (Bit8u)((blocks + 150) % 75); // frame;
} else {
buf[len++] = (blocks >> 24) & 0xff;
buf[len++] = (blocks >> 16) & 0xff;
buf[len++] = (blocks >> 8) & 0xff;
buf[len++] = (blocks >> 0) & 0xff;
}
buf[0] = ((len-2) >> 8) & 0xff;
buf[1] = (len-2) & 0xff;
*length = len;
return 1;
}
#else
BX_INFO(( "Read TOC - Not Implemented" ));
return 0;
#endif
#else
BX_INFO(("read_toc: your OS is not supported yet."));
return 0; // OS not supported yet, return 0 always.
#endif
}
Bit32u
cdrom_interface::capacity()
{
// Return CD-ROM capacity. I believe you want to return
// the number of blocks of capacity the actual media has.
#if !defined WIN32
// win32 has its own way of doing this
if (using_file) {
// return length of the image file
struct stat stat_buf;
int ret = fstat (fd, &stat_buf);
if (ret) {
BX_PANIC (("fstat on cdrom image returned err: %s", strerror(errno)));
}
if ((stat_buf.st_size % 2048) != 0) {
BX_ERROR (("expected cdrom image to be a multiple of 2048 bytes"));
}
return (stat_buf.st_size / 2048) + 150;
}
#endif
#ifdef __BEOS__
return GetNumDeviceBlocks(fd, BX_CD_FRAMESIZE);
#elif defined(__sun)
{
struct stat buf = {0};
if (fd < 0) {
BX_PANIC(("cdrom: capacity: file not open."));
}
if( fstat(fd, &buf) != 0 )
BX_PANIC(("cdrom: capacity: stat() failed."));
return(buf.st_size);
}
#elif (defined(__NetBSD__) || defined(__NetBSD_kernel__) || defined(__OpenBSD__))
{
// We just read the disklabel, imagine that...
struct disklabel lp;
if (fd < 0)
BX_PANIC(("cdrom: capacity: file not open."));
if (ioctl(fd, DIOCGDINFO, &lp) < 0)
BX_PANIC(("cdrom: ioctl(DIOCGDINFO) failed"));
BX_DEBUG(( "capacity: %u", lp.d_secperunit ));
return(lp.d_secperunit);
}
#elif defined(__linux__)
{
// Read the TOC to get the data size, since BLKGETSIZE doesn't work on
// non-ATAPI drives. This is based on Keith Jones code below.
// <splite@purdue.edu> 21 June 2001
int i, dtrk_lba, num_sectors;
int dtrk = 0;
struct cdrom_tochdr td;
struct cdrom_tocentry te;
if (fd < 0)
BX_PANIC(("cdrom: capacity: file not open."));
if (ioctl(fd, CDROMREADTOCHDR, &td) < 0)
BX_PANIC(("cdrom: ioctl(CDROMREADTOCHDR) failed"));
num_sectors = -1;
dtrk_lba = -1;
for (i = td.cdth_trk0; i <= td.cdth_trk1; i++) {
te.cdte_track = i;
te.cdte_format = CDROM_LBA;
if (ioctl(fd, CDROMREADTOCENTRY, &te) < 0)
BX_PANIC(("cdrom: ioctl(CDROMREADTOCENTRY) failed"));
if (dtrk_lba != -1) {
num_sectors = te.cdte_addr.lba - dtrk_lba;
break;
}
if (te.cdte_ctrl & CDROM_DATA_TRACK) {
dtrk = i;
dtrk_lba = te.cdte_addr.lba;
}
}
if (num_sectors < 0) {
if (dtrk_lba != -1) {
te.cdte_track = CDROM_LEADOUT;
te.cdte_format = CDROM_LBA;
if (ioctl(fd, CDROMREADTOCENTRY, &te) < 0)
BX_PANIC(("cdrom: ioctl(CDROMREADTOCENTRY) failed"));
num_sectors = te.cdte_addr.lba - dtrk_lba;
} else
BX_PANIC(("cdrom: no data track found"));
}
BX_INFO(("cdrom: Data track %d, length %d", dtrk, num_sectors));
return(num_sectors);
}
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
{
// Read the TOC to get the size of the data track.
// Keith Jones <freebsd.dev@blueyonder.co.uk>, 16 January 2000
#define MAX_TRACKS 100
int i, num_tracks, num_sectors;
struct ioc_toc_header td;
struct ioc_read_toc_entry rte;
struct cd_toc_entry toc_buffer[MAX_TRACKS + 1];
if (fd < 0)
BX_PANIC(("cdrom: capacity: file not open."));
if (ioctl(fd, CDIOREADTOCHEADER, &td) < 0)
BX_PANIC(("cdrom: ioctl(CDIOREADTOCHEADER) failed"));
num_tracks = (td.ending_track - td.starting_track) + 1;
if (num_tracks > MAX_TRACKS)
BX_PANIC(("cdrom: TOC is too large"));
rte.address_format = CD_LBA_FORMAT;
rte.starting_track = td.starting_track;
rte.data_len = (num_tracks + 1) * sizeof(struct cd_toc_entry);
rte.data = toc_buffer;
if (ioctl(fd, CDIOREADTOCENTRYS, &rte) < 0)
BX_PANIC(("cdrom: ioctl(CDIOREADTOCENTRYS) failed"));
num_sectors = -1;
for (i = 0; i < num_tracks; i++) {
if (rte.data[i].control & 4) { /* data track */
num_sectors = ntohl(rte.data[i + 1].addr.lba)
- ntohl(rte.data[i].addr.lba);
BX_INFO(( "cdrom: Data track %d, length %d",
rte.data[i].track, num_sectors));
break;
}
}
if (num_sectors < 0)
BX_PANIC(("cdrom: no data track found"));
return(num_sectors);
}
#elif defined WIN32
{
if (bUseASPI) {
return ((GetCDCapacity(hid, tid, lun) / 2352) + 1);
} else if (using_file) {
ULARGE_INTEGER FileSize;
FileSize.LowPart = GetFileSize(hFile, &FileSize.HighPart);
return (Bit32u)((FileSize.QuadPart / 2048) + 150);
} else { /* direct device access */
if (isWindowsXP) {
LARGE_INTEGER length;
DWORD iBytesReturned;
DeviceIoControl(hFile, IOCTL_DISK_GET_LENGTH_INFO, NULL, 0, &length, sizeof(length), &iBytesReturned, NULL);
return (Bit32u)(length.QuadPart / 2048);
} else {
ULARGE_INTEGER FreeBytesForCaller;
ULARGE_INTEGER TotalNumOfBytes;
ULARGE_INTEGER TotalFreeBytes;
GetDiskFreeSpaceEx( path, &FreeBytesForCaller, &TotalNumOfBytes, &TotalFreeBytes);
return (Bit32u)(TotalNumOfBytes.QuadPart / 2048);
}
}
}
#elif defined __APPLE__
// Find the size of the first data track on the cd. This has produced
// the same results as the linux version on every cd I have tried, about
// 5. The differences here seem to be that the entries in the TOC when
// retrieved from the IOKit interface appear in a reversed order when
// compared with the linux READTOCENTRY ioctl.
{
// Return CD-ROM capacity. I believe you want to return
// the number of bytes of capacity the actual media has.
BX_INFO(( "Capacity" ));
struct _CDTOC * toc = ReadTOC( CDDevicePath );
if ( toc == NULL ) {
BX_PANIC(( "capacity: Failed to read toc" ));
}
size_t toc_entries = ( toc->length - 2 ) / sizeof( struct _CDTOC_Desc );
BX_DEBUG(( "reading %d toc entries\n", toc_entries ));
int start_sector = -1;
int data_track = -1;
// Iterate through the list backward. Pick the first data track and
// get the address of the immediately previous (or following depending
// on how you look at it). The difference in the sector numbers
// is returned as the sized of the data track.
for ( int i=toc_entries - 1; i>=0; i-- ) {
BX_DEBUG(( "session %d ctl_adr %d tno %d point %d lba %d z %d p lba %d\n",
(int)toc->trackdesc[i].session,
(int)toc->trackdesc[i].ctrl_adr,
(int)toc->trackdesc[i].tno,
(int)toc->trackdesc[i].point,
MSF_TO_LBA( toc->trackdesc[i].address ),
(int)toc->trackdesc[i].zero,
MSF_TO_LBA(toc->trackdesc[i].p )));
if ( start_sector != -1 ) {
start_sector = MSF_TO_LBA(toc->trackdesc[i].p) - start_sector;
break;
}
if ((toc->trackdesc[i].ctrl_adr >> 4) != 1) continue;
if ( toc->trackdesc[i].ctrl_adr & 0x04 ) {
data_track = toc->trackdesc[i].point;
start_sector = MSF_TO_LBA(toc->trackdesc[i].p);
}
}
free( toc );
if ( start_sector == -1 ) {
start_sector = 0;
}
BX_INFO(("first data track %d data size is %d", data_track, start_sector));
return start_sector;
}
#else
BX_ERROR(( "capacity: your OS is not supported yet." ));
return(0);
#endif
}
bx_bool BX_CPP_AttrRegparmN(3)
cdrom_interface::read_block(Bit8u* buf, int lba, int blocksize)
{
// Read a single block from the CD
#ifdef WIN32
LARGE_INTEGER pos;
#else
off_t pos;
#endif
ssize_t n = 0;
Bit8u try_count = 3;
Bit8u* buf1;
if (blocksize == 2352) {
memset(buf, 0, 2352);
memset(buf+1, 0xff, 10);
int raw_block = lba + 150;
buf[12] = (raw_block / 75) / 60;
buf[13] = (raw_block / 75) % 60;
buf[14] = (raw_block % 75);
buf[15] = 0x01;
buf1 = buf + 16;
} else {
buf1 = buf;
}
do {
#ifdef WIN32
if(bUseASPI) {
ReadCDSector(hid, tid, lun, lba, buf1, BX_CD_FRAMESIZE);
n = BX_CD_FRAMESIZE;
} else {
pos.QuadPart = (LONGLONG)lba*BX_CD_FRAMESIZE;
pos.LowPart = SetFilePointer(hFile, pos.LowPart, &pos.HighPart, SEEK_SET);
if ((pos.LowPart == 0xffffffff) && (GetLastError() != NO_ERROR)) {
BX_PANIC(("cdrom: read_block: SetFilePointer returned error."));
} else {
ReadFile(hFile, (void *) buf1, BX_CD_FRAMESIZE, (unsigned long *) &n, NULL);
}
}
#elif defined(__APPLE__)
#define CD_SEEK_DISTANCE kCDSectorSizeWhole
if(using_file)
{
pos = lseek(fd, lba*BX_CD_FRAMESIZE, SEEK_SET);
if (pos < 0) {
BX_PANIC(("cdrom: read_block: lseek returned error."));
} else {
n = read(fd, buf1, BX_CD_FRAMESIZE);
}
}
else
{
// This seek will leave us 16 bytes from the start of the data
// hence the magic number.
pos = lseek(fd, lba*CD_SEEK_DISTANCE + 16, SEEK_SET);
if (pos < 0) {
BX_PANIC(("cdrom: read_block: lseek returned error."));
} else {
n = read(fd, buf1, CD_FRAMESIZE);
}
}
#else
pos = lseek(fd, lba*BX_CD_FRAMESIZE, SEEK_SET);
if (pos < 0) {
BX_PANIC(("cdrom: read_block: lseek returned error."));
} else {
n = read(fd, (char*) buf1, BX_CD_FRAMESIZE);
}
#endif
} while ((n != BX_CD_FRAMESIZE) && (--try_count > 0));
return (n == BX_CD_FRAMESIZE);
}
#endif /* if BX_SUPPORT_CDROM */
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