static long multiboot_LoadExtraDrivers(FileLoadDrivers_t FileLoadDrivers_p)
{
char extensionsSpec[1024];
int ramdiskUnit;
for(ramdiskUnit = 0; ramdiskUnit < gMI->mi_mods_count; ++ramdiskUnit)
{
int partCount; // unused
BVRef ramdiskChain = diskScanBootVolumes(0x100 + ramdiskUnit, &partCount);
if(ramdiskChain == NULL)
{
verbose("Ramdisk contains no partitions\n");
continue;
}
for(; ramdiskChain != NULL; ramdiskChain = ramdiskChain->next)
{
sprintf(extensionsSpec, "rd(%d,%d)/Extra/", ramdiskUnit, ramdiskChain->part_no);
struct dirstuff *extradir = opendir(extensionsSpec);
closedir(extradir);
if(extradir != NULL)
{
int ret = FileLoadDrivers_p(extensionsSpec, 0 /* this is a kext root dir, not a kext with plugins */);
if(ret != 0)
{
verbose("FileLoadDrivers failed on a ramdisk\n");
return ret;
}
}
}
}
return 0;
}
void scanBootVolumes( int biosdev, int * count )
{
BVRef bvr = 0;
bvr = diskScanBootVolumes(biosdev, count);
if (bvr == NULL)
{
bvr = nbpScanBootVolumes(biosdev, count);
if (bvr != NULL)
{
gBootFileType = kNetworkDeviceType;
}
}
else
{
gBootFileType = kBlockDeviceType;
}
}
int mountRAMDisk(const char * param)
{
int fh = 0, ramDiskSize;
int error = 0;
// Get file handle for ramdisk file.
fh = open(param, 0);
if (fh != -1)
{
printf("\nreading ramdisk image: %s", param);
ramDiskSize = file_size(fh);
if (ramDiskSize > 0)
{
// Unmount previously mounted image if exists.
umountRAMDisk();
// Read new ramdisk image contents into PREBOOT_DATA area.
if (read(fh, (char *)PREBOOT_DATA, ramDiskSize) != ramDiskSize) error = -1;
}
else error = -1;
close(fh);
}
else error = -1;
if (error == 0)
{
// Save filename in gRAMDiskFile to display information.
strcpy(gRAMDiskFile, param);
// Set gMI as well for the multiboot ramdisk driver hook.
gMI = gRAMDiskMI = malloc(sizeof(multiboot_info));
struct multiboot_module * ramdisk_module = malloc(sizeof(multiboot_module));
// Fill in multiboot info and module structures.
if (gRAMDiskMI != NULL && ramdisk_module != NULL)
{
gRAMDiskMI->mi_mods_count = 1;
gRAMDiskMI->mi_mods_addr = (uint32_t)ramdisk_module;
ramdisk_module->mm_mod_start = PREBOOT_DATA;
ramdisk_module->mm_mod_end = PREBOOT_DATA + ramDiskSize;
// Set ramdisk driver hooks.
p_get_ramdisk_info = &multiboot_get_ramdisk_info;
p_ramdiskReadBytes = &multibootRamdiskReadBytes;
int partCount; // unused
// Save bvr of the mounted image.
gRAMDiskVolume = diskScanBootVolumes(0x100, &partCount);
if(gRAMDiskVolume == NULL)
{
umountRAMDisk();
printf("\nRamdisk contains no partitions.");
}
else
{
char dirSpec[128];
// Reading ramdisk configuration.
strcpy(dirSpec, RAMDISKCONFIG_FILENAME);
if (loadConfigFile(dirSpec, &bootInfo->ramdiskConfig) == 0)
{
getBoolForKey("BTAlias", &gRAMDiskBTAliased, &bootInfo->ramdiskConfig);
}
else
{
printf("\nno ramdisk config...\n");
}
printf("\nmounting: done");
}
}
}
return error;
}
