PRX
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Overview
Playstation Relocatable Executable (PRX)
PRX2
A PRX module is PRX2 format only if ehdr.e_type is ET_SCE_EXEC or ET_SCE_RELEXEC.
A Program Segment is PRX2 format only if p_type is PT_SCE_RELA or PT_SCE_COMMENT.
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 PRXs but it is currently unknown what it is used for.
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