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=== 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 ===
+
+
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"
|-
|-
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| 0x10
| 0x10
| 0x10 * 3
| 0x10 * 3
−| SegmentHeader for each segment
+| SegmentHeader[3]
|-
|-
| 0x40
| 0x40
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| 0x60
| 0x60
| 0x4 * 3
| 0x4 * 3
−| file size of each segment (i.e. LZ4-compressed size)
+| CompressedSize[3]
|-
|-
| 0x6c
| 0x6c
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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.
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| 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