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SVC: Difference between revisions

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Source range gets reprotected to --- (it can no longer be accessed), and bit0 is set in the source [[#MemoryAttribute]].
Source range gets reprotected to --- (it can no longer be accessed), and bit0 is set in the source [[#MemoryAttribute]].


If dstaddr >= LowerTreshold, the dst-range is enforced to be within the process' "MapRegion". Code can get the range of this region from [[#svcGetInfo]] id0=2,3.
[1.0.0] This could be used to map into either the Alias Region or the Stack region.


In this case, the mapped memory will have state 0x5C3C0B.
[2.0.0+] This can only be used to map into the Stack region.


As long as (dstaddr+size) < LowerThreshold, then you can map anywhere but the mapped memory will have state 0x482907 instead.
Code can get the range of the Alias region from [[#svcGetInfo]] id0=2,3, and on 2.0.0+ the range of the Stack region via [[#svcGetInfo]] id0=14, 15 (on 1.0.0, the Stack region had hardcoded limits).


LowerTreshold is 0x80000000 for 36-bit address spaces, and 0x40000000 for 32-bit ones.
When mapped into the Alias region, the mapped memory will have state 0x482907.


[2.0.0+] Support for the 0x482907 mappings outside the "MapRegion" were removed.
When mapped into the Stack region, the mapped memory will have state 0x5C3C0B.


== svcUnmapMemory ==
== svcUnmapMemory ==
Line 799: Line 799:
| Process || 13 || 0 || [2.0.0+] AddressSpaceSize
| Process || 13 || 0 || [2.0.0+] AddressSpaceSize
|-
|-
| Process || 14 || 0 || [2.0.0+] NewMapRegionBaseAddr
| Process || 14 || 0 || [2.0.0+] StackRegionBaseAddr
|-
|-
| Process || 15 || 0 || [2.0.0+] NewMapRegionSize
| Process || 15 || 0 || [2.0.0+] StackRegionSize
|-
|-
| Process || 16 || 0 || [3.0.0+] PersonalMmHeapSize
| Process || 16 || 0 || [3.0.0+] PersonalMmHeapSize
Line 1,791: Line 1,791:
| 0x00402006 || MemoryType_SharedMemory || Mapped using [[#svcMapSharedMemory]].
| 0x00402006 || MemoryType_SharedMemory || Mapped using [[#svcMapSharedMemory]].
|-
|-
| 0x00482907 || [1.0.0] MemoryType_WeirdMappedMemory || Mapped using [[#svcMapMemory]].
| 0x00482907 || [1.0.0] MemoryType_Alias || Mapped using [[#svcMapMemory]].
|-
|-
| 0x00DD7E08 || MemoryType_ModuleCodeStatic || Mapped using [[#svcMapProcessCodeMemory]].
| 0x00DD7E08 || MemoryType_ModuleCodeStatic || Mapped using [[#svcMapProcessCodeMemory]].
Line 1,806: Line 1,806:
| 0x005C3C0A || [[IPC_Marshalling|MemoryType_IpcBuffer0]] || IPC buffers with descriptor flags=0.
| 0x005C3C0A || [[IPC_Marshalling|MemoryType_IpcBuffer0]] || IPC buffers with descriptor flags=0.
|-
|-
| 0x005C3C0B || MemoryType_MappedMemory || Mapped using [[#svcMapMemory]].
| 0x005C3C0B || MemoryType_Stack || Mapped using [[#svcMapMemory]].
|-
|-
| 0x0040200C || [[Thread Local Storage|MemoryType_ThreadLocal]] || Mapped during [[#svcCreateThread]].
| 0x0040200C || [[Thread Local Storage|MemoryType_ThreadLocal]] || Mapped during [[#svcCreateThread]].
Retrieved from "https://switchbrew.org/wiki/SVC"