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Line 420:
// Heap chunk header+ struct
− {
− 0x00: magic
− 0x04: size
− 0x08: back
− 0x0C: next
− } heap_chunk_header_t; // sizeof() = 0x10
−There are 3 valid magic values:+When memory is allocated to a heap, the linked list (terminated using nullptr's) is traversed to find a large enough chunk, chunks are split and back and forward pointers are cleared for the allocated chunk. When a chunk is allocated aligned, a chunk bigger than the needed one may be allocated. Inside this chunk, a second heap chunk is set up in a fashion that the beginning of the memory block described by this "inner" chunk is aligned according to the specified alignment. It's magic is set to 0xBABE0002 and the back pointer is set to the chunk containing it. These inner chunks can not be expanded.+
| 0x2A || 0x2A || IOSError || FreeAndClear || IOSHeapId id, void *ptr
| 0x2A || 0x2A || IOSError || FreeAndClear || IOSHeapId id, void *ptr
|-
|-
−| 0x2B || 0x2B || IOSError || Expand || IOSHeapId id, void *ptr, u32 size
+| 0x2B || 0x2B || IOSError || ReAlloc || IOSHeapId id, void *ptr, u32 size
|-
|-
| 0x2C || 0x2C || IOSError || IOS_RegisterResourceManager || const char* path, IOSMessageQueueId id
| 0x2C || 0x2C || IOSError || IOS_RegisterResourceManager || const char* path, IOSMessageQueueId id
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| 0x76 || 0x6A || IOSError || IOS_GetSemaphoreUtilization ||
| 0x76 || 0x6A || IOSError || IOS_GetSemaphoreUtilization ||
|-
|-
−| 0x77 || 0x6B || IOSError || GetHeapProfile ||
+| 0x77 || 0x6B || IOSError || GetHeapProfile || IOSHeapId id, [[#IOSHeapProfile|IOSHeapProfile]] *profile
|-
|-
| 0x78 || 0x6C || IOSError || EnableIopClockMultiplier || bool enable
| 0x78 || 0x6C || IOSError || EnableIopClockMultiplier || bool enable
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| 0x0 || 0x4 || Base
| 0x0 || 0x4 || Base
|-
|-
−| 0x4 || 0x4 || Pid
+| 0x4 || 0x4 || Owner
|-
|-
| 0x8 || 0x4 || Size
| 0x8 || 0x4 || Size
|-
|-
−| 0xC || 0x4 || FirstFree
+| 0xC || 0x4 || [[#IOSChunk|FreeList]]
|-
|-
−| 0x10 || 0x4 || ErrorCountOutOfMemory
+| 0x10 || 0x4 || AllocErrors
|-
|-
−| 0x14 || 0x4 || ErrorCountFreeBlockNotInHeap
+| 0x14 || 0x4 || FreeErrors
|-
|-
−| 0x18 || 0x4 || ErrorCountExpandInvalidBlock
+| 0x18 || 0x4 || ReAllocErrors
|-
|-
−| 0x1C || 0x4 || ErrorCountCorruptedBlock
+| 0x1C || 0x4 || InvalidChunks
|-
|-
| 0x20 || 0x4 || Flags
| 0x20 || 0x4 || Flags
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| 0x28 || 0x4 || LargestAllocatedSize
| 0x28 || 0x4 || LargestAllocatedSize
|-
|-
−| 0x2C || 0x4 || TotalAllocationCount
+| 0x2C || 0x4 || AllocatedChunks
|-
|-
−| 0x30 || 0x4 || TotalFreedCount
+| 0x30 || 0x4 || FreeChunks
|-
|-
−| 0x34 || 0x4 || ErrorCountFreeUnallocatedBlock
+| 0x34 || 0x4 || FreeUnusedChunkErrors
|-
|-
−| 0x38 || 0x4 || ErrorCountAllocInvalidHeap
+| 0x38 || 0x4 || AllocInvalidHeapErrors
|-
|-
−| 0x3C || 0x4 || Id
+| 0x3C || 0x4 || AllocInvalidHeapId
|}
|}
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{| class="wikitable"
{| class="wikitable"
|-
|-
−! Heap ID
+! Value
−! Purpose
+! Description
|-
|-
| 0x0001
| 0x0001
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0x2: Cross process heap
0x2: Cross process heap
−Each heap is created from memory of the shared heap. It is initialized as one big seperate memory chunk. Memory chunks have the following structure:
+Each heap is created from memory of the shared heap. It is initialized as one big seperate memory chunk.
−When memory is allocated to a heap, the linked list (terminated using nullptr's) is traversed to find a large enough chunk, chunks are split and back and forward pointers are cleared for the allocated chunk. When a chunk is allocated aligned, a chunk bigger than the needed one may be allocated. Inside this chunk, a second heap chunk is set up in a fashion that the beginning of the memory block described by this "inner" chunk is aligned according to the specified alignment. It's magic is set to 0xBABE0002 and the back pointer is set to the chunk containing it. These inner chunks can not be expanded.
−== IOSChunk ==
+{| class="wikitable" border="1"
+|-
+! Offset || Size || Description
+|-
+| 0x0 || 0x4 || [[#Status|Status]]
+|-
+| 0x4 || 0x4 || Size
+|-
+| 0x8 || 0x4 || [[#IOSChunk|PrevFree]]
+|-
+| 0xC || 0x4 || [[#IOSChunk|NextFree]]
+|}
+=== Status ===
{| class="wikitable"
{| class="wikitable"
|-
|-
−! Magic
+! Value
−! Meaning
+! Description
|-
|-
| 0xBABE0000
| 0xBABE0000
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|}
|}
−== IOSHeapProfile ==
+{| class="wikitable" border="1"
+|-
+! Offset || Size || Description
+|-
+| 0x0 || 0x4 || Owner
+|-
+| 0x4 || 0x4 || Base
+|-
+| 0x8 || 0x4 || Size
+|-
+| 0xC || 0x4 || FreeChunks
+|-
+| 0x10 || 0x4 || LargestChunkSize
+|-
+| 0x14 || 0x4 || SmallestChunkSize
+|-
+| 0x18 || 0x4 || TotalFreeSize
+|-
+| 0x1C || 0x4 || AllocErrors
+|-
+| 0x20 || 0x4 || FreeErrors
+|-
+| 0x24 || 0x4 || ReAllocErrors
+|-
+| 0x28 || 0x4 || CorruptChunks
+|-
+| 0x2C || 0x4 || InvalidChunks
+|-
+| 0x30 || 0x4 || Flags
+|}
== IOSTimeStruct ==
== IOSTimeStruct ==