Editing Talk:SELF File Format

== Authentication ID ==

Difference in auth id :
PSP : ? PSP SELF doesn't have the same sort of SELF header (magic = "PSP" instead of "SCE")
PS3 : 1x xx xx xx xx xx xx xx
PSVita : 2x xx xx xx xx xx xx xx
PS4 : 3x xx xx xx xx xx xx xx

Offset 0x80 in the SELF header. <code>SceWebCore</code> (NPXS10017 / NPXS10037 on 1.69, replaced later by SceWebKit) has 0x8000 set; the only system app with that flag set.

<code>sceAppMgrConvertVs0UserDrivePath</code> checks the authentication id to limit mount points.

<code>0x2800000000008003</code> seen used by [[SceWebCore]] can access <code>vs0:data/external/cert/</code> and <code>vs0:data/external/webcore/</code>.

<code>0x2800000000008004</code> seen used by games and <code>0x210000101CD20007</code> seen used by [[PSM]] can only access <code>vs0:data/external</code> and <code>vs0:sys/external</code>

== Relocations ==

{| class="wikitable"
|-
! Offset !! Size !! Description
|-
| 0x0 || 0x4 || Relocation Type
|-
| 0x4 || 0x4 || Long entry: Addend
|-
| 0x4 || 0x4 || Short entry: 0-19 = Bits 10-29 of offset, 20-31 = addend
|-
| 0x8 || 0x4 || Long entry: Offset
|-
|}

Relocations can be of two types: 8 byte "short" entries or 12 byte "long" entries. The relocation code is the same as ARM ELF format.


Segment start = Buffer address of segment indexed at "Patch segment"

Symbol start = Buffer address of segment indexed at "Symbol segment"

Address to patch = segment start + offset

P = address to patch

S = "Symbol segment" == 15 ? 0 : symbol start

A = addend

=== Relocation Type ===

{| class="wikitable"
|-
! Start !! End !! Description
|-
| 0 || 3 || Short entry if set
|-
| 4 || 7 || Symbol segment
|-
| 8 || 15 || Relocation code
|-
| 16 || 19 || Patch segment
|-
| 20 || 27 || Long entry: Optional relocation code 2
|-
| 28 || 31 || Long entry: Optional distance 2
|-
| 20 || 31 || Short entry: Lower 12 bits of offset
|-
|}

=== Supported Relocation Codes (1.69) ===

{| class="wikitable"
|-
! Code !! Description
|-
| 0 ||  R_ARM_NONE
|-
| 2 ||  R_ARM_ABS32
|-
| 3 ||  R_ARM_REL32
|-
| 10||  R_ARM_THM_CALL
|-
| 28||  R_ARM_CALL
|-
| 29||  R_ARM_JUMP24
|-
| 38||  R_ARM_TARGET1 (same as R_ARM_ABS32)
|-
| 40||  R_ARM_V4BX (same as R_ARM_NONE)
|-
| 41||  R_ARM_TARGET2 (same as R_ARM_REL32)
|-
| 42||  R_ARM_PREL31
|-
| 43||  R_ARM_MOVW_ABS_NC
|-
| 44||  R_ARM_MOVT_ABS
|-
| 47||  R_ARM_THM_MOVW_ABS_NC
|-
| 48||  R_ARM_THM_MOVT_ABS
|-
|}