Talk:SELF File Format: Difference between revisions

From Vita Developer wiki
Jump to navigation Jump to search
Line 6: Line 6:
Well the question is for sure long time answered but the Vita CPU is a 32 bit one.
Well the question is for sure long time answered but the Vita CPU is a 32 bit one.
<br/>[[User:Cfwprophet|Cfwprophet]] 00:29, 22 Sept 2016
<br/>[[User:Cfwprophet|Cfwprophet]] 00:29, 22 Sept 2016
== Authentication ID ==
Offset 0x80 in the SELF header. <code>SceWebCore</code> 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 only 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
|-
|}

Revision as of 22:07, 2 November 2016

psp2swu.self

By looking this reference (http://www.sco.com/developers/gabi/latest/ch4.eheader.html) seems that the self data is written for 32 bit, instead of 64 as i should expect. anybody knows why?
Deroad 04:58, 25 June 2012 (EDT)

Well the question is for sure long time answered but the Vita CPU is a 32 bit one.
Cfwprophet 00:29, 22 Sept 2016

Authentication ID

Offset 0x80 in the SELF header. SceWebCore has 0x8000 set; the only system app with that flag set.

sceAppMgrConvertVs0UserDrivePath checks the authentication id to limit mount points.

0x2800000000008003 seen used by SceWebCore can only access vs0:data/external/cert/ and vs0:data/external/webcore/

0x2800000000008004 seen used by games and 0x210000101CD20007 seen used by PSM can only access vs0:data/external and vs0:sys/external

Relocations

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

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)

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
Retrieved from "http://www.psdevwiki.com/vita/index.php?title=Talk:SELF_File_Format&oldid=4976"