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Line 3:
Line 3: − === SegmentHeader ===+ − {| class="wikitable" border="1" − |- − ! Offset − ! Size − ! Description − |- − | 0x0 − | 4 − | file offset of data − |- − | 0x4 − | 4 − | memory offset loaded to − |- − | 0x8 − | 4 − | size of data copied to memory offset (i.e. size after decompression) − |- − | 0xC − | 4 − | alignment used on memory size / size of .bss in the case of .data segment − |} − − === .rodata-relative extent === − {| class="wikitable" border="1" − |- − ! Offset − ! Size − ! Description − |- − | 0x0 − | 4 − | offset (relative to .rodata) − |- − | 0x4 − | 4 − | size of region − |} − − === NSO Header === Line 68:
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Line 115: − + − + − +
no edit summary
It starts with the "NSO" header and mainly describes .text, .rodata, and .data segments (like a short-form of ELF program headers):
It starts with the "NSO" header and mainly describes .text, .rodata, and .data segments (like a short-form of ELF program headers):
= NSO Header =
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
| 0x10
| 0x10
| 0x10 * 3
| 0x10 * 3
| SegmentHeader for each segment
| SegmentHeader[3]
|-
|-
| 0x40
| 0x40
| 0x60
| 0x60
| 0x4 * 3
| 0x4 * 3
| file size of each segment (i.e. LZ4-compressed size)
| CompressedSize[3]
|-
|-
| 0x6c
| 0x6c
For example, the MOD header is essentially a replacement for a PT_DYNAMIC program header.
For example, the MOD header is essentially a replacement for a PT_DYNAMIC program header.
=== MOD ===
== SegmentHeader ==
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 4
| FileOffset
|-
| 0x4
| 4
| MemoryOffset
|-
| 0x8
| 4
| DecompressedSize
|-
| 0xC
| 4
| UnkOffset/UnkSize/BssSize
|}
== .rodata-relative extent ==
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 4
| RegionRoDataOffset
|-
| 0x4
| 4
| RegionSize
|}
== MOD ==
All offsets are signed 32bit values relative to the magic field.
All offsets are signed 32bit values relative to the magic field.
The 32bits at image base + 4 must point to the magic field.
The 32bits at image base + 4 must point to the magic field.
| 0x00
| 0x00
| 4
| 4
| zero padding
| ZeroPadding
|-
|-
| 0x04
| 0x04
| 4
| 4
| offset to magic. Always 8 (so it works when MOD is at image_base + 0).
| MagicOffset. Always 8 (so it works when MOD is at image_base + 0).
|-
|-
| 0x08
| 0x08
| 4
| 4
| magic "MOD0"
| Magic "MOD0"
|-
|-
| 0x0C
| 0x0C