PRX: Difference between revisions

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'''P'''laystation '''R'''elocatable E'''x'''ecutable (PRX)
'''P'''laystation '''R'''elocatable E'''x'''ecutable (PRX)


= Structure =
= Relocations =


First LOAD segment p_paddr points to module info.
== PS3 ==
 
== Module Info ==
 
{| class="wikitable"
! Offset
! Type
! Description
|-
| 0
| short
| Module attributes
|-
| 2
| char[2]
| Module version
|-
| 4
| char[28]
| Module name
|-
| 0x20
| long
| TOC address
|-
| 0x24
| long
| Pointer to the start of exports section
|-
| 0x28
| long
| Pointer to end of exports section
|-
| 0x2C
| long
| Points to the start of imports section
|-
| 0x30
| long
| Points to the end of imports section
|}
 
=== Exports ===
 
{| class="wikitable"
! Offset
! Type
! Description
|-
| 0
| char[2]
| Structure size (0x1C 32-bit or 0x28 64-bit), padding
|-
| 2
| short
| Version
|-
| 4
| short
| Attributes
|-
| 6
| short
| Number of functions
|-
| 8
| short
| Number of variables
|-
| 0xA
| short
| Number of thread local storage variables
|-
| 0xC
| char
| Hash info
|-
| 0xD
| char
| Thread local storage hash info
|-
| 0xE
| char[2]
| Reserved
|-
| 0x10
| long
| Pointer to exported library name
|-
| 0x14
| long
| Pointer to function NID table
|-
| 0x18
| long
| Pointer to function stub table
|}
 
=== Imports ===
 
{| class="wikitable"
! Offset
! Type
! Description
|-
| 0
| char
| Structure size (0x2C)
|-
| 1
| char
| Unused
|-
| 2
| short
| Version
|-
| 4
| short
| Attributes. AUTO_EXPORT=0x0001, WEAK_EXPORT=0x0002, NOLINK_EXPORT=0x0004, WEAK_IMPORT=0x0008, 0x2000 seems to indicate a non-PRX library (like "stdc" or "allocator") that comes from somewhere else (LV2?)
|-
| 6
| short
| Number of functions
|-
| 8
| short
| Number of variables
|-
| 0xA
| short
| Number of thread local storage variables
|-
| 0xC
| byte[4]
| reserved
|-
| 0x10
| long
| Pointer to imported library name.
|-
| 0x14
| long
| Pointer to the list of NID's for the exported functions.
|-
| 0x18
| long
| Pointer to the list of exported functions.
|-
| 0x1C
| long
| var_nid_table
|-
| 0x20
| long
| var_entry_table
|-
| 0x24
| long
| tls_nid_table
|-
| 0x28
| long
| tls_entry_table
|}
 
== Relocations ==
 
=== PS3 ===


Relocations can be found in either PT_SCE_PPURELA segments or SHT_SCE_PPURELA / SHT_RELA sections. RELA relocations are standard relocations while PPURELA relocations have 2 segment (program header) indexes stored in r_sym of r_info.  
Relocations can be found in either PT_SCE_PPURELA segments or SHT_SCE_PPURELA / SHT_RELA sections. RELA relocations are standard relocations while PPURELA relocations have 2 segment (program header) indexes stored in r_sym of r_info.  

Revision as of 01:09, 28 December 2019

Overview

Playstation Relocatable Executable (PRX)

Relocations

PS3

Relocations can be found in either PT_SCE_PPURELA segments or SHT_SCE_PPURELA / SHT_RELA sections. RELA relocations are standard relocations while PPURELA relocations have 2 segment (program header) indexes stored in r_sym of r_info.

  • The first index can be extracted with 0x7FFFFF00 as a mask and is used as a base address for r_addend. This sum will be the value applied to the patch.
  • The second index can be extracted with 0x000000FF as a mask and is used as a base address for the target segment to patch and is added to r_offset.
  • The first bit (0x80000000) is also set on earlier PRX's but it is currently unknown what it is used for.


SCE File Types
Certified File
NPDRM
NPDRM · App Types · ACT.DAT · RIF
PKG
EDAT
RCOXML
CXML
XMBML
XMB Config
DB Config
Databases
System Data
XMB Preload
Licences
 ·
Games/Apps
PS3
Emulators
Web
Unsorted
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