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
vsh	0xE44F29F4	cellFsUtilMount syscall
vsh	0xE932A8C0	reboot and show minimum version
vsh	0xFF4A1633	cellFsUtilMount 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