VSH

VSH is the internal name used by Sony for the VShell aka VirtualShell. It then loads up the XMB you know.XrossMediaBar (XMB). This, is a user space executable (vsh.self), loaded by lv2_kernel/sys_init_osd.

from here several other functions/syscalls to other modules are made, e.g. lv2 (SELF decryption), lv1 (Secure_RTC, Storage_Manager, Gelic_Device, BD_Drive) etc.

not much is documented (yet) about this module. Please fill in where possible.

Modes

possible arguments to pass when executing vsh.self:

• --mode=gametool
• --mode=gametool2
• --arcade=true

Offsets

Function	3.55	3.41	3.15	Notes
-	-	-	-	-
			sub_308EE4	check_Is_Act_Dat_for_This_Acc_ID

Exports

Export Library	Export NID	Notes
sys_io	-	-
sys_fs	-	-
sys_fs_ps2disc	0x8160A811	switches /dev_ps2disc(1) mount?
vsh	0xF48562D	cellSsAimIsCEX
vsh	0x145991B4	cellSsAimIsArcade
vsh	0x172B05CD	update_mgr_write_eprom syscall
vsh	0x1B890AD2	update_mgr_get_token_seed syscall
vsh	0x1F80E287	cellSsAimIsTool
vsh	0x2C563C92	update_mgr_read_eprom syscall
vsh	0x3231E012	vtrm_Decrypt_Master syscall
vsh	0x349F1535	update_mgr_set_token syscall
vsh	0x3B4A1AC4	AIM GetDeviceId syscall
vsh	0x3F062337	AIM GetPsCode syscall
sdk	0x5FAFE92B	cellCryptoPuSha1Hash
sdk	0xB45387CD	AesCbcCfb128Decrypt
paf	-	-
vshcommon	-	-
vshnet	-	-
vshmain	-	-
vshtask	-	-

To help documenting offsets+exports, you can use this dumper tool for vsh (actually,no need to dump anymore).

Display Buffers

VSH uses 2 of 8 available display buffers. Information about them can be aquired by vsh plugins using this code snippet: [[1]]
In FW 4.46 DEX the buffer info looks like this (for 1920x1080):

GCMBUFINFO 0
offset: 0xdc80000
pitch: 0x2000
width: 0x780
height: 0x438

GCMBUFINFO 1
offset: 0xe500000
pitch: 0x2000
width: 0x780
height: 0x438