SceSblSsSmComm

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SceSblSsSmComm is a kernel module that is primarily responsible for calling SM functions.

Module

Version World Privilege
0.931.010-3.740.011 Non-secure Kernel

Libraries

Known NIDs

Version Name World Visibility NID
0.931.010-3.740.011 SceSblSmCommForKernel Non-secure Kernel 0xCD3C89B6
0.931.010-1.692.000 SceSblSsSmComm Non-secure User 0xD8DC7847
1.800.071-3.740.011 SceSblSsSmComm Non-secure User not present

Types

/* example of spawner_self_auth_info
char data[0x90] =
{
   0x01,0x00,0x00,0x00, 0x00,0x00,0x08,0x28, // KBL program-authority-id
   0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,
   0x80,0x00,0x00,0x00, 0xC0,0x00,0xF0,0x00, // KBL capability
   0x00,0x00,0x00,0x00, 0xFF,0xFF,0xFF,0xFF,
   0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,
   0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,
   0x80,0x09,0x80,0x03, 0x00,0x00,0xC3,0x00, // KBL attribute
   0x00,0x00,0x80,0x09, 0x80,0x00,0x00,0x00,
   0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,
   0x00,0x00,0x00,0x00, 0xFF,0xFF,0xFF,0xFF,
   0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, // KBL shared secret
   0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,
   0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,
   0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,
   0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,
   0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,
   0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,
   0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,
}; */

typedef struct SceSelfAuthInfo { // size is 0x90 on FWs 0.931.010-3.740.011
   SceUInt64 program_authority_id;
   uint8_t padding[8];
   uint8_t capability[0x20];
   uint8_t attribute[0x20];
   SceSharedSecret shared_secret; // current hypothesis of SceSharedSecret is full (0x40 bytes) shared_secret overwritten with klicensee at offset 0x10
} SceSelfAuthInfo;

typedef struct SceSblSmCommContext130 { // size is 0x130 on FWs 0.931.010-3.740.011 (as its name indicates)
   SceUInt32 unk_0;
   SceUInt32 self_type; // kernel = 0, user = 1, SM = 2, 0x10, 0x100, ?0x10001 main user process?
   SceSelfAuthInfo spawner_self_auth_info; // can be obtained with sceKernelGetSelfAuthInfoForKernel
   SceSelfAuthInfo spawned_self_auth_info; // set by secure_kernel in response SceSblSmCommContext130
   SceUInt32 media_type; // can be obtained with sceSblACMgrGetMediaTypeForKernel or sceIoGetMediaTypeForDriver
   SceUInt32 unk_0x12C; // if (kbl_param->boot_type_indicator_1????? & 0x40) == 1, then set unk_0x12C to 1, else set to 10, ?mistook with media_type?
} SceSblSmCommContext130;

SceSblSmCommForKernel

sceSblSmCommCallFunc_ForKernel

Version NID
0.931.010-1.000.041 0x4960DF9E
1.692.000-3.740.011 not present

This function is just a 4-argument wrapper for #sceSblSmCommCallFuncForKernel. 

typedef struct sceSblSmCommCallFunc_Param {
    void *pData;
    SceSize dataSize;
} sceSblSmCommCallFunc_Param;

int sceSblSmCommCallFunc_ForKernel(SceSmSchedRequestId req_id, SceUInt32 func_id, SceUInt32 *pResponse, sceSblSmCommCallFunc_Param *pParam);

sceSblSmCommStopCommForKernel

Version NID
0.931.010-1.000.041 0xC35FB95A
1.692.000-3.740.011 not present 
int sceSblSmCommStopCommForKernel(SceSmSchedRequestId req_id);

sceSblSmCommStartSmForKernel

Version NID
0.931.010-1.000.041 0x7863A0CC
1.692.000-1.810.021 not present
3.600.011-3.740.011 0x7863A0CC

Priority is binary: 1 = low, 0 = high. Running a high priority SM while a low priority one is currently running will suspend the low one.

The following conditions must be met in order for this function to be called successfully: - In kernel thread. - In kernel context.

Calling a function without satisfying the conditions freezes the system. 

int sceSblSmCommStartSmForKernel(SceBool priority, const char *sm_self_path, SceSblSmCommContext130 *ctx_130, SceSmSchedRequestId *req_id);

sceSblSmCommStartSm_ForKernel

Version NID
0.931.010-1.800.071 0x992BB9DB
3.600.011-3.740.011 not present 
int sceSblSmCommStartSm_ForKernel(SceBool priority, const char *path, SceBool some_bool, int unk_a4, int unk_a5, int unk_a6, SceSblSmCommContext130 *pCtx, SceSmSchedRequestId *pReqId);

sceSblSmCommStartSmFromDataForKernel

Version NID
0.931.010-1.800.071 not present
3.600.011-3.740.011 0x039C73B1 
int sceSblSmCommStartSmFromDataForKernel(SceBool priority, const void *sm_self, SceSize sm_self_size, int cmd_id, SceSblSmCommContext130 *ctx_130, SceSmSchedRequestId *req_id);

sceSblSmCommCallFuncForKernel

Version NID
0.931.010-3.740.011 0xDB9FC204 
int sceSblSmCommCallFuncForKernel(SceSmSchedRequestId req_id, SceUInt32 func_id, SceUInt32 *pResponse, void *pData, SceSize dataSize);

sceSblSmCommStopSmForKernel

Version NID
0.931.010-3.740.011 0x0631F8ED

This function calls sceSblSmCommCallFuncForKernel with -1 (0xFFFFFFFF) as func_id and then calls sceSblSmSchedProxyWaitForKernel. 

int sceSblSmCommStopSmForKernel(SceSmSchedRequestId req_id, status_handler *pStatusHandler);

SceSblSsSmComm

This library is present up to and including System Software version 1.692.000, then removed since System Software version 1.800.071 for security reasons.

sceSblSmCommStartSm

Version NID
0.931.010-1.000.041 0x7863A0CC
1.692.000-3.740.011 not present

Alias for #sceSblSmCommStartSmForKernel.

sceSblSmCommCallFunc_

Version NID
0.931.010-1.000.041 0x4960DF9E
1.692.000-3.740.011 not present

Alias for #sceSblSmCommCallFunc_ForKernel.

sceSblSmCommStopComm

Version NID
0.931.010-1.000.041 0xC35FB95A
1.692.000-3.740.011 not present

Alias for #sceSblSmCommStopCommForKernel.

sceSblSmCommStartSm_

Version NID
0.931.010-1.692.000 0x992BB9DB
1.800.071-3.740.011 not present

Alias for #sceSblSmCommStartSm_ForKernel.

sceSblSmCommCallFunc

Version NID
0.931.010-1.692.000 0xDB9FC204
1.800.071-3.740.011 not present

Alias for #sceSblSmCommCallFuncForKernel.

sceSblSmCommStopSm

Version NID
0.931.010-1.692.000 0x0631F8ED
1.800.071-3.740.011 not present

Alias for #sceSblSmCommStopSmForKernel.

Changelog

Between 1.000.041 and 1.692.000 (to precise): many exported functions were removed. These functions were exported both to usermode and to kernel.

Between 1.692.000 and 1.800.071: the usermode library SceSblSsSmComm was removed. It should not have been exported to usermode for two security reasons: firstly SM communication should not be handled by usermode programs, secondly these exported functions were pointing to their kernel equivalent without any check on input addresses.

Between 1.800.071 and 2.500.071 (to precise): sceSblSmCommStartSm_ForKernel was replaced by two functions: sceSblSmCommStartSmForKernel (same name as in 0.931.010) that has the same features and sceSblSmCommStartSmFromDataForKernel that loads a SM from a buffer instead of a file.

Obfuscated names

Since some System Software version between 1.000.041 and 1.692.000 (to precise), the module is compiled with a MACRO that converts some object names to obfuscated names. The algorithm is obfuscated_name = "SceSblSmComm" + hash(real_name) where hash is an unknown function.

Real name Hash of real name Obfuscated name Comments
SceSblSmComm 0xB639DB03 SceSblSmCommB639DB03 event flag
SceSblSmCommMutex 0xAB75E2BE SceSblSmCommAB75E2BE fast mutex
SceSblSmCommSema (guessed name) 0x62970C2D SceSblSmComm62970c2d sema (not present on <=1.000.041)
SceSblSmCommReadBuff 0x8D26C678 SceSblSmComm8D26C678 memblock
SceSblCmCommBuff 0x7EB92BED SceSblSmComm7EB92BED memblock
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