SVC: Difference between revisions - Nintendo Switch Brew

Line 252:

'''Description:''' Maps a memory range into a different range.

~~Useful~~ for adding guard pages around stack.

Mainly used for adding guard pages around stack.

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

In this case, the mapped memory will have state <code>~~0x482907~~</code>.

In this case, the mapped memory will have state <code>0x5C3C0B</code>.

As long as (dstaddr+size) < LowerThreshold, then you can map anywhere but the mapped memory will have state <code>~~0x5C3C0B~~</code> instead.

As long as (dstaddr+size) < LowerThreshold, then you can map anywhere but the mapped memory will have state <code>0x482907</code> instead.

LowerTreshold is 0x80000000 for 36-bit address spaces, and 0x40000000 for 32-bit ones.

[2.0.0+] Support for the <code>0x482907</code> mappings outside the "MapRegion" were removed.

== svcUnmapMemory ==

@@ Line 252: / Line 252: @@
 '''Description:''' Maps a memory range into a different range.
-Useful for adding guard pages around stack.
+Mainly used for adding guard pages around stack.
-Source range gets reprotected to --- (it can no longer be accessed), and bit0 is set in [[#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.
-In this case, the mapped memory will have state <code>0x482907</code>.
+In this case, the mapped memory will have state <code>0x5C3C0B</code>.
-As long as (dstaddr+size) < LowerThreshold, then you can map anywhere but the mapped memory will have state <code>0x5C3C0B</code> instead.
+As long as (dstaddr+size) < LowerThreshold, then you can map anywhere but the mapped memory will have state <code>0x482907</code> instead.
 LowerTreshold is 0x80000000 for 36-bit address spaces, and 0x40000000 for 32-bit ones.
+[2.0.0+] Support for the <code>0x482907</code> mappings outside the "MapRegion" were removed.
 == svcUnmapMemory ==