The means for unprivileged code to query the Hypervisor for privileged tasks.
Anywhere in unprivileged code you can make a system call by loading r0 with the call ID and executing the ‘sc’ instruction. Some system calls take additional parameters in r3-r9
# Send 0xFF to POST output
li r3, 0xFF
li r0, 0xD
sc
blr
| File Structure |
|---|
| ID |
| 0x00 |
| 0x01 |
| 0x02 |
| 0x03 |
| 0x04 |
| 0x05 |
| 0x06 |
| 0x07 |
| 0x08 |
| 0x09 |
| 0x0A |
| 0x0B |
| 0x0C |
| 0x0D |
| 0x0E |
| 0x0F |
| 0x10 |
| 0x11 |
| 0x12 |
| 0x13 |
| 0x14 |
| 0x15 |
| 0x16 |
| 0x17 |
| 0x18 |
| 0x19 |
| 0x1A |
| 0x1B |
| 0x1C |
| 0x1D |
| 0x1E |
| 0x1F |
| 0x20 |
| 0x21 |
| 0x22 |
| 0x23 |
| 0x24 |
| 0x25 |
| 0x26 |
| 0x27 |
| 0x28 |
| 0x29 |
| 0x2A |
| 0x2B |
| 0x2C |
| 0x2D |
| 0x2E |
| 0x2F |
| 0x30 |
| 0x31 |
| 0x32 |
| 0x33 |
| 0x34 |
| 0x35 |
| 0x36 |
| 0x37 |
| 0x38 |
| 0x39 |
| 0x3A |
| 0x3B |
| 0x3C |
| 0x3D |
| 0x3E |
| 0x3F |
| 0x40 |
| 0x41 |
| 0x42 |
| 0x43 |
| 0x44 |
| 0x45 |
| 0x46 |
| 0x47 |
| 0x48 |
| 0x49 |
| 0x4A |
| 0x4B |
| 0x4C |
| 0x4D |
| 0x4E |
| 0x4F |
| 0x50 |
| 0x51 |
| 0x52 |
| 0x53 |
| 0x54 |
| 0x55 |
| 0x56 |
| 0x57 |
| 0x58 |
| 0x59 |
| 0x5A |
| 0x5B |
| 0x5C |
| 0x5D |
| 0x5E |
| 0x5F |
| 0x60 |
| 0x61 |
| 0x62 |
| 0x63 |
| 0x64 |
| 0x65 |
| 0x66 |
| 0x67 |
| 0x68 |
| 0x69 |
| 0x6A |
| 0x6B |
| 0x6C |
| 0x6D |
| 0x6E |
| 0x6F |
| 0x70 |
| 0x71 |
| 0x72 |
| 0x73 |
| 0x74 |
| 0x75 |
| 0x76 |