static int readwrite_pio(int devno, uint64_t sect, void *buf, void (*rwdata)(struct device*, void*))
{
int use_irq, cmd, st, res = -1;
uint32_t sect_low, sect_high;
struct device *dev = devices + devno;
if(dev->id == -1) {
return -1;
}
use_irq = get_current_proc() != 0;
if(use_irq) {
/* wait for the interface to become available */
mutex_lock(&pending);
}
select_dev(dev);
/* LBA48 requires the high-order bits first */
if(sect >= dev->nsect_lba) {
sect_high = (uint32_t)(sect >> 24);
sect_low = (uint32_t)sect & 0xffffff;
if(sect >= dev->nsect_lba48) {
goto end;
}
cmd = CMD_READ48;
write_reg8(dev, REG_COUNT, 0);
write_reg8(dev, REG_LBA0, sect_high & 0xff);
write_reg8(dev, REG_LBA1, (sect_high >> 8) & 0xff);
write_reg8(dev, REG_LBA2, (sect_high >> 16) & 0xff);
} else {
void windows_read_enter(CPUState *cpu, target_ulong pc, uint32_t FileHandle, uint32_t Event, uint32_t UserApcRoutine, uint32_t UserApcContext, uint32_t IoStatusBlock, uint32_t Buffer, uint32_t BufferLength, uint32_t ByteOffset, uint32_t Key) {
int64_t offset = -1;
if (ByteOffset != 0) {
// Byte offset into file is specified (pointer to LARGE_INTEGER). Read and interpret.
panda_virtual_memory_rw(cpu, ByteOffset, (uint8_t *)&offset, sizeof(offset), 0);
//printf("NtReadFile: %lu[%ld]\n", (unsigned long)FileHandle, offset);
} else {
//printf("NtReadFile: %lu[]\n", (unsigned long)FileHandle);
}
char *filename = get_handle_name(cpu, get_current_proc(cpu), FileHandle);
if (ByteOffset && (offset >= 0 && offset < (1L << 48))) {
read_enter(cpu, pc, filename, offset, Buffer, BufferLength);
}
else {
offset = get_file_handle_pos(cpu, get_current_proc(cpu), FileHandle);
if (offset != -1)
read_enter(cpu, pc, filename, offset, Buffer, BufferLength);
else // last resort. just assume last_pos.
read_enter(cpu, pc, filename, last_pos, Buffer, BufferLength);
}
}