Loaders
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Explaination
Loaders are used for loading other modules.
Commonly found in CoreOS and Flash.
Known loaders
| Loader | Location | Type | Remarks |
|---|---|---|---|
| bootldr | Flash | Boot Loader | primairy loader from chain of trust |
| metldr | Flash | Meta Loader | aka asecure_loader. Loads other loaders |
| appldr | CoreOS | Application Loader | loads vsh.self (Userspace Module) |
| isoldr | CoreOS | Isolation Loader | loading isolated SPU modules |
| lv1ldr | CoreOS | Hypervisor Loader | loads lv1.self (Hypervisor) |
| lv2ldr | CoreOS | Supervisor Loader | loads lv2_kernel.self (Supervisor kernel) |
Stop Codes
| Stop Code | Module | Remark |
|---|---|---|
| 0x30 | isoldr | Version mismatch (isoldr version differs from version returned by SPU channel 73). |
isoldr
Used for loading isolated SPU modules.
LS Parameters layout
| Address | Usage | Comments |
|---|---|---|
| 0x3E000 | Wait flag | If (flag==0){wait;} // use 0xFF00000000ULL |
| 0x3E400 | EID0 | |
| 0x3E800 | Arguments | |
| 0x3EC00 | QA-Token | If not used set to -1 |
| 0x3F000 | Program revoke list |
Arguments
Depending which isolated module you want to load, you would need to pass it different arguments.
| Size | Name | spp_verifier | |
|---|---|---|---|
| u64 | prog_auth_id; | 0x1050000003000001 | |
| u64 | lpar_auth_id; | 0x1070000002000001 | |
| u64 | *spu_module; | SPU - address in ram | |
| u64 | *spu_module_arg1; | Profile - address in ram | |
| u64 | spu_module_arg1_size; | sizeof(profile) | |
| u64 | *spu_module_arg2; | Not used | |
| u64 | spu_module_arg2_size; | Not used | |
| u8 | res1[16]; | Unknown | |
| u64 | field48; | 3 | |
| u8 res2[16]; | Unknown |