Reverse Area-related MP calls
- MPCreateArea - MPCreateAliasArea - MPSetAreaBackingProvider - MPSetAreaAccess (only renamed from KC...)
This commit is contained in:
Elliot Nunn
parent
423b809e87
commit
4d5929ffd8
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@ -777,58 +777,83 @@ KCSetTaskAddressSpace ; OUTSIDE REFERER
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DeclareMPCall 72, MPCall_72
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; This MP call does some of the heavy lifting for the MPLibrary function
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; of the same name. No pages are mapped into the Area.
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MPCall_72 ; OUTSIDE REFERER
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; ARG AddressSpaceID r3 (optional)
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; long r4 PTEConfig
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; long r5 length
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; long r6 LogicalSeparation
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; long r7 flagsAndMinAlign
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; char *r8 LogicalBase
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; RET r3 OSErr
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; char *r8 LogicalBase
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; AreaID r9
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; Hint: in the 9.2.2 System MPLibrary, MPCreateArea calls a syscall
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; wrapper function at code offset 0x7fa8, with arguments pointing to save
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; locations for r8 and r9.
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DeclareMPCall 72, MPCreateArea
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MPCreateArea
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_Lock PSA.SchLock, scratch1=r16, scratch2=r17
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; If !r3 then use the current address space
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mr. r8, r3
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mfsprg r28, 0
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lwz r30, EWA.PA_CurAddressSpace(r28)
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beq- MPCall_72_0x38
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beq- @use_current_space
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; r8 = id
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; ... else use the one specified.
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bl LookupID
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cmpwi r9, AddressSpace.kIDClass
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mr r30, r8
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bne+ ReleaseAndReturnMPCallInvalidIDErr
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@use_current_space
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MPCall_72_0x38
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li r8, 160
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; r1 = kdp
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; r8 = size
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; Allocate the new Area
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li r8, Area.Size
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bl PoolAlloc
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; r8 = ptr
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mr. r31, r8
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beq+ major_0x0af60
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; Populate
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stw r30, Area.AddressSpacePtr(r31)
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stw r4, 0x001c(r31)
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stw r4, Area.PTEConfig(r31)
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stw r5, Area.Length(r31)
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lwz r8, 0x0134(r6)
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lwz r8, ContextBlock.r6(r6)
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stw r8, Area.LogicalSeparation(r31)
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lwz r8, 0x013c(r6)
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stw r8, 0x0020(r31)
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lwz r8, 0x0144(r6)
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lwz r8, ContextBlock.r7(r6)
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stw r8, Area.FlagsAndMinAlign(r31)
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lwz r8, ContextBlock.r8(r6)
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stw r8, Area.LogicalBase(r31)
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; "Create" the area
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mr r8, r31
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bl createarea
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_AssertAndRelease PSA.SchLock, scratch=r16
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MPCall_72_0x90
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stw r16, PSA.SchLock + Lock.Count(r1)
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mr. r3, r9
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bne- MPCall_72_0xb0
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bne- @error
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; CreateArea returned successfully
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lwz r8, Area.LogicalBase(r31)
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stw r8, 0x0144(r6)
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stw r8, ContextBlock.r8(r6)
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lwz r8, Area.ID(r31)
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stw r8, 0x014c(r6)
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stw r8, ContextBlock.r9(r6)
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b CommonMPCallReturnPath
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MPCall_72_0xb0
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@error
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bl PoolFree
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b CommonMPCallReturnPath
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@ -1475,9 +1500,28 @@ FindAreaAbove ; OUTSIDE REFERER
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DeclareMPCall 73, MPCall_73
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; This MP call does most of the work for the same-named MPLibrary
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; function. An "alias" Area is created from a template. This code is very
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; similar to regular MPCreateArea above, so differences are commented.
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MPCall_73 ; OUTSIDE REFERER
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; ARG AreaID r3 ; Alias-specific
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; long r4 PTEConfig
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; long r5 length
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; long r6 LogicalSeparation
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; long r7 flagsAndMinAlign
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; char *r8 LogicalBase
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; long r9 unknown ; Alias-specific
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; RET r3 OSErr
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; char *r8 LogicalBase
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; AreaID r10 ; Alias-specific
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; Hint: in the 9.2.2 System MPLibrary, MPCreateAliasArea calls a syscall
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; wrapper function at code offset 0x7fe8, with arguments pointing to save
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; locations for r8 and r10.
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DeclareMPCall 73, MPCreateAliasArea
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MPCreateAliasArea
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_Lock PSA.SchLock, scratch1=r16, scratch2=r17
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@ -1486,193 +1530,263 @@ MPCall_73 ; OUTSIDE REFERER
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cmpwi r9, Area.kIDClass
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bne+ ReleaseAndReturnMPCallInvalidIDErr
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; Confirm that the template Area is not itself an alias
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mr r30, r8
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lwz r16, 0x0008(r30)
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rlwinm. r8, r16, 0, 28, 28
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lwz r16, Area.Flags(r30)
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rlwinm. r8, r16, 0, Area.kAliasFlag, Area.kAliasFlag
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bne+ major_0x0b054
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; Allocate the new Area
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li r8, Area.Size
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bl PoolAlloc
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mr. r31, r8
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beq+ major_0x0af60
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; Populate
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mfsprg r28, 0
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lwz r8, EWA.PA_CurAddressSpace(r28)
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stw r8, Area.AddressSpacePtr(r31)
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stw r3, 0x0014(r31)
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stw r30, 0x0044(r31)
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stw r4, 0x001c(r31)
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stw r3, Area.ParentAreaID(r31) ; Alias-specific
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stw r30, Area.AliasLLL + LLL.Freeform(r31) ; Alias-specific
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stw r4, Area.PTEConfig(r31)
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stw r5, Area.Length(r31)
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lwz r8, 0x0134(r6)
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lwz r8, ContextBlock.r6(r6)
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stw r8, Area.LogicalSeparation(r31)
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lwz r8, 0x013c(r6)
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stw r8, 0x0020(r31)
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lwz r8, 0x0144(r6)
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lwz r8, ContextBlock.r7(r6)
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stw r8, Area.FlagsAndMinAlign(r31)
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lwz r8, ContextBlock.r8(r6)
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stw r8, Area.LogicalBase(r31)
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lwz r8, 0x014c(r6)
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lwz r8, ContextBlock.r9(r6) ; Alias-specific
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stw r8, 0x0080(r31)
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li r8, 0x08
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li r8, 1 << (31 - Area.kAliasFlag) ; Alias-specific
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stw r8, Area.Flags(r31)
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; "Create" the area (everything after here is identical to MPCreateArea)
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mr r8, r31
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bl createarea
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_AssertAndRelease PSA.SchLock, scratch=r16
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MPCall_73_0xb0
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stw r16, PSA.SchLock + Lock.Count(r1)
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mr. r3, r9
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bne- MPCall_73_0xd0
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bne- @error
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; CreateArea returned successfully
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lwz r8, Area.LogicalBase(r31)
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stw r8, 0x0144(r6)
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stw r8, ContextBlock.r8(r6)
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lwz r8, Area.ID(r31)
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stw r8, 0x0154(r6)
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stw r8, ContextBlock.r10(r6) ; Alias-specific
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b CommonMPCallReturnPath
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MPCall_73_0xd0
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; ...or not
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@error
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bl PoolFree
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b CommonMPCallReturnPath
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DeclareMPCall 74, MPCall_74
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; Delete an Area: the eponymous MPLibrary function is a simple wrapper
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MPCall_74 ; OUTSIDE REFERER
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; 1. Only works on unprivileged Areas with no mapped pages.
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; 2. Remove from parent address space.
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; 3. Remove from template Area's alias list if applicable.
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; 4. Delete the "PageMap" array if present.
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; 5. Delete the "Fault Counter" array if present.
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; 6. Delete the structure from the pool.
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; ARG AreaID r3
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; RET OSErr r3
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DeclareMPCall 74, MPDeleteArea
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MPDeleteArea
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_Lock PSA.SchLock, scratch1=r16, scratch2=r17
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; Look up and validate
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mr r8, r3
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; r8 = id
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bl LookupID
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cmpwi r9, Area.kIDClass
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bne+ ReleaseAndReturnMPCallInvalidIDErr
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mr r31, r8
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; If pages are still mapped in, fail with OOM
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; If area is privileged, fail with privileged
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lwz r17, Area.BytesMapped(r31)
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lwz r29, Area.Flags(r31)
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cmpwi cr1, r17, 0x00
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rlwinm. r8, r29, 0, 29, 29
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cmpwi cr1, r17, 0
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rlwinm. r8, r29, 0, Area.kPrivilegedFlag, Area.kPrivilegedFlag
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bne+ cr1, ReleaseAndReturnMPCallOOM
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bne+ ReleaseAndReturnMPCallPrivilegedErr
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rlwinm. r8, r29, 0, 28, 28
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lwz r16, 0x004c(r31)
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bne- MPCall_74_0x5c
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addi r17, r31, 0x44
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; If is alias area and is not at back of queue (???), fail with OOM
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rlwinm. r8, r29, 0, Area.kAliasFlag, Area.kAliasFlag
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lwz r16, Area.AliasLLL + LLL.Next(r31)
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bne- @dont_check_for_nonempty_alias
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addi r17, r31, Area.AliasLLL
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cmpw r16, r17
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bne+ ReleaseAndReturnMPCallOOM
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@dont_check_for_nonempty_alias
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MPCall_74_0x5c
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; HTAB lock wraps around all Address Space structures?
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_Lock PSA.HTABLock, scratch1=r18, scratch2=r9
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addi r16, r31, 0x54
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lwz r17, 0x0008(r16)
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lwz r18, 0x000c(r16)
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stw r17, 0x0008(r18)
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stw r18, 0x000c(r17)
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li r17, 0x00
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stw r17, 0x0008(r16)
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stw r17, 0x000c(r16)
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rlwinm. r8, r29, 0, 28, 28
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addi r16, r31, 0x44
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beq- MPCall_74_0xbc
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lwz r17, 0x0008(r16)
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lwz r18, 0x000c(r16)
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stw r17, 0x0008(r18)
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stw r18, 0x000c(r17)
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li r17, 0x00
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stw r17, 0x0008(r16)
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stw r17, 0x000c(r16)
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; Remove from parent address space
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addi r16, r31, Area.LLL
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RemoveFromList r16, scratch1=r17, scratch2=r18
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; Remove from template area's list of aliases, if necessary
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rlwinm. r8, r29, 0, Area.kAliasFlag, Area.kAliasFlag
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addi r16, r31, Area.AliasLLL
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beq- @not_alias_so_dont_remove_from_alias_list
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RemoveFromList r16, scratch1=r17, scratch2=r18
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@not_alias_so_dont_remove_from_alias_list
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MPCall_74_0xbc
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_AssertAndRelease PSA.HTABLock, scratch=r18
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lwz r8, 0x0040(r31)
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rlwinm. r16, r29, 0, 25, 25
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cmpwi cr1, r8, 0x00
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bne- MPCall_74_0x178
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rlwinm. r16, r29, 0, 27, 27
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beq- cr1, MPCall_74_0x178
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bne- MPCall_74_0x174
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; DELETE PAGEMAP (array of [array of] per-page data)
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; There are a few cases here...
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lwz r8, Area.PageMapArrayPtr(r31)
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rlwinm. r16, r29, 0, Area.kDontOwnPageMapArray, Area.kDontOwnPageMapArray
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cmpwi cr1, r8, 0
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bne- @no_pagemap
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rlwinm. r16, r29, 0, Area.kPageMapArrayInPool, Area.kPageMapArrayInPool
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beq- cr1, @no_pagemap
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bne- @pagemap_in_pool
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; If PageMap occupies whole pages then return those pages
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; directly to the free list without bothering the pool
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; (Pool lock still protects free list)
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_Lock PSA.PoolLock, scratch1=r18, scratch2=r9
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rlwinm. r16, r29, 0, 26, 26
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beq- MPCall_74_0x14c
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rlwinm. r16, r29, 0, Area.kPageMapArrayIs2D, Area.kPageMapArrayIs2D
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beq- @pagemap_is_1d
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; CASE: 2D array, all in whole pages
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; r19 := size of ptr array in primary page
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lwz r19, Area.Length(r31)
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mr r20, r8
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srwi r19, r19, 12
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addi r19, r19, 0x3ff
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addi r19, r19, 0x3ff
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srwi r19, r19, 10
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slwi r19, r19, 2
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subi r19, r19, 4
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slwi r19, r19, 2
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MPCall_74_0x134
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; Free every second-level page
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subi r19, r19, 4
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@2d_pagemap_delete_loop
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lwzx r8, r19, r20
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; r1 = kdp
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; r8 = maybe the page
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bl free_list_add_page
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cmpwi r19, 0x00
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cmpwi r19, 0
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subi r19, r19, 4
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bgt+ MPCall_74_0x134
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bgt+ @2d_pagemap_delete_loop
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mr r8, r20
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MPCall_74_0x14c
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; r1 = kdp
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; r8 = maybe the page
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bl free_list_add_page
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_AssertAndRelease PSA.PoolLock, scratch=r18
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b MPCall_74_0x178
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MPCall_74_0x174
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; COMMON CASE: single first-level page of 2D or 1D-in-whole-page case
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@pagemap_is_1d
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bl free_list_add_page
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_AssertAndRelease PSA.PoolLock, scratch=r18
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b @pagemap_deleted
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; CASE: 1D array in pool block (not whole page)
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@pagemap_in_pool
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bl PoolFree
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MPCall_74_0x178
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lwz r8, 0x003c(r31)
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clrlwi. r16, r29, 0x1f
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cmpwi cr1, r8, 0x00
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beq- cr1, MPCall_74_0x20c
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bne- MPCall_74_0x208
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@pagemap_deleted
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@no_pagemap
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; DELETE FAULT COUNTER ARRAY
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; Again, the code to manage the cases is tricky.
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lwz r8, Area.FaultCtrArrayPtr(r31)
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rlwinm. r16, r29, 0, Area.kFaultCtrArrayInPool, Area.kFaultCtrArrayInPool
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cmpwi cr1, r8, 0
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beq- cr1, @no_faultctr
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bne- @faultctr_in_pool
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; Whole-page cases require us to get the Pool lock manually (for free list)
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_Lock PSA.PoolLock, scratch1=r18, scratch2=r9
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rlwinm. r16, r29, 0, 30, 30
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beq- MPCall_74_0x1e0
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rlwinm. r16, r29, 0, Area.kFaultCtrArrayIs2D, Area.kFaultCtrArrayIs2D
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beq- @faultctr_is_1d
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; CASE: 2D array, all in whole pages
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; Once again, r19 = the size of the primary array
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lwz r19, Area.Length(r31)
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mr r20, r8
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srwi r19, r19, 12
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addi r19, r19, 0x7ff
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addi r19, r19, 0x7ff
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srwi r19, r19, 11
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slwi r19, r19, 2
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subi r19, r19, 4
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slwi r19, r19, 2
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MPCall_74_0x1c8
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; Free every second-level page
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subi r19, r19, 4
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@2d_faultctr_delete_loop
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lwzx r8, r19, r20
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; r1 = kdp
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; r8 = maybe the page
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bl free_list_add_page
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cmpwi r19, 0x00
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cmpwi r19, 0
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subi r19, r19, 4
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bgt+ MPCall_74_0x1c8
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bgt+ @2d_faultctr_delete_loop
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mr r8, r20
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MPCall_74_0x1e0
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; r1 = kdp
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; r8 = maybe the page
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bl free_list_add_page
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_AssertAndRelease PSA.PoolLock, scratch=r18
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b MPCall_74_0x20c
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MPCall_74_0x208
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; COMMON CASE: single first-level page of 2D or 1D-in-whole-page case
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||||
|
||||
@faultctr_is_1d
|
||||
bl free_list_add_page
|
||||
|
||||
_AssertAndRelease PSA.PoolLock, scratch=r18
|
||||
|
||||
b @faultctr_deleted
|
||||
|
||||
|
||||
; CASE: 1D array in pool block (not whole page)
|
||||
|
||||
@faultctr_in_pool
|
||||
bl PoolFree
|
||||
|
||||
MPCall_74_0x20c
|
||||
|
||||
@faultctr_deleted
|
||||
@no_faultctr
|
||||
|
||||
|
||||
; Delete the struct from the pool
|
||||
lwz r8, Area.ID(r31)
|
||||
bl DeleteID
|
||||
mr r8, r31
|
||||
bl PoolFree
|
||||
|
||||
; r1 = kdp
|
||||
|
||||
; Return noErr
|
||||
b ReleaseAndReturnZeroFromMPCall
|
||||
|
||||
|
||||
|
|
@ -1937,12 +2051,12 @@ MPCall_130_0x19c
|
|||
|
||||
|
||||
|
||||
; KCSetAreaAccess
|
||||
; MPSetAreaAccess
|
||||
|
||||
|
||||
DeclareMPCall 76, KCSetAreaAccess
|
||||
DeclareMPCall 76, MPSetAreaAccess
|
||||
|
||||
KCSetAreaAccess ; OUTSIDE REFERER
|
||||
MPSetAreaAccess ; OUTSIDE REFERER
|
||||
|
||||
_Lock PSA.SchLock, scratch1=r16, scratch2=r17
|
||||
|
||||
|
|
@ -1975,21 +2089,21 @@ KCSetAreaAccess ; OUTSIDE REFERER
|
|||
cmplw cr2, r28, r19
|
||||
blt+ cr1, major_0x0b054
|
||||
bgt+ cr2, major_0x0b054
|
||||
bne- KCSetAreaAccess_0x154
|
||||
bne- MPSetAreaAccess_0x154
|
||||
|
||||
_Lock PSA.HTABLock, scratch1=r14, scratch2=r15
|
||||
|
||||
|
||||
KCSetAreaAccess_0x9c
|
||||
MPSetAreaAccess_0x9c
|
||||
mr r8, r29
|
||||
bl MPCall_95_0x1e4
|
||||
beq+ Local_Panic
|
||||
bl MPCall_95_0x2b0
|
||||
bns- cr7, KCSetAreaAccess_0xb8
|
||||
bns- cr7, MPSetAreaAccess_0xb8
|
||||
bltl- cr5, MPCall_95_0x2e0
|
||||
bltl- cr5, MPCall_95_0x348
|
||||
|
||||
KCSetAreaAccess_0xb8
|
||||
MPSetAreaAccess_0xb8
|
||||
lwz r17, 0x0000(r30)
|
||||
bl major_0x10d38
|
||||
and r8, r4, r5
|
||||
|
|
@ -1998,40 +2112,40 @@ KCSetAreaAccess_0xb8
|
|||
and r18, r18, r9
|
||||
lwz r17, 0x0000(r30)
|
||||
rlwinm. r8, r18, 0, 26, 26
|
||||
bns- cr7, KCSetAreaAccess_0x118
|
||||
bgt- cr6, KCSetAreaAccess_0x118
|
||||
beq- KCSetAreaAccess_0x118
|
||||
bns- cr7, MPSetAreaAccess_0x118
|
||||
bgt- cr6, MPSetAreaAccess_0x118
|
||||
beq- MPSetAreaAccess_0x118
|
||||
rlwinm r9, r17, 0, 0, 19
|
||||
lwz r8, 0x0068(r31)
|
||||
|
||||
KCSetAreaAccess_0xec
|
||||
MPSetAreaAccess_0xec
|
||||
addi r8, r8, -0x20
|
||||
dcbf r8, r9
|
||||
cmpwi r8, 0x00
|
||||
bgt+ KCSetAreaAccess_0xec
|
||||
bgt+ MPSetAreaAccess_0xec
|
||||
sync
|
||||
lwz r8, 0x0068(r31)
|
||||
|
||||
KCSetAreaAccess_0x104
|
||||
MPSetAreaAccess_0x104
|
||||
addi r8, r8, -0x20
|
||||
icbi r8, r9
|
||||
cmpwi r8, 0x00
|
||||
bgt+ KCSetAreaAccess_0x104
|
||||
bgt+ MPSetAreaAccess_0x104
|
||||
isync
|
||||
|
||||
KCSetAreaAccess_0x118
|
||||
MPSetAreaAccess_0x118
|
||||
bl major_0x10cb8
|
||||
lwz r19, 0x0068(r31)
|
||||
stw r17, 0x0000(r30)
|
||||
add r29, r29, r19
|
||||
subf. r8, r29, r28
|
||||
bge+ KCSetAreaAccess_0x9c
|
||||
bge+ MPSetAreaAccess_0x9c
|
||||
_AssertAndRelease PSA.HTABLock, scratch=r14
|
||||
|
||||
; r1 = kdp
|
||||
b ReleaseAndReturnZeroFromMPCall
|
||||
|
||||
KCSetAreaAccess_0x154
|
||||
MPSetAreaAccess_0x154
|
||||
bne+ cr1, major_0x0b054
|
||||
lwz r18, 0x001c(r31)
|
||||
and r8, r4, r5
|
||||
|
|
@ -2050,18 +2164,18 @@ KCSetAreaAccess_0x154
|
|||
lwz r27, 0x0068(r31)
|
||||
mr r28, r19
|
||||
|
||||
KCSetAreaAccess_0x1a4
|
||||
MPSetAreaAccess_0x1a4
|
||||
mr r8, r29
|
||||
lwz r9, Area.AddressSpacePtr(r31)
|
||||
bl MPCall_95_0x45c
|
||||
beq- KCSetAreaAccess_0x1bc
|
||||
beq- MPSetAreaAccess_0x1bc
|
||||
bl MPCall_95_0x2e0
|
||||
bl MPCall_95_0x348
|
||||
|
||||
KCSetAreaAccess_0x1bc
|
||||
MPSetAreaAccess_0x1bc
|
||||
add r29, r29, r27
|
||||
subf. r8, r29, r28
|
||||
bge+ KCSetAreaAccess_0x1a4
|
||||
bge+ MPSetAreaAccess_0x1a4
|
||||
_AssertAndRelease PSA.HTABLock, scratch=r14
|
||||
|
||||
; r1 = kdp
|
||||
|
|
@ -2259,34 +2373,39 @@ MPCall_123 ; OUTSIDE REFERER
|
|||
|
||||
|
||||
|
||||
DeclareMPCall 77, MPCall_77
|
||||
; Does the blue task always get these notifications?
|
||||
|
||||
MPCall_77 ; OUTSIDE REFERER
|
||||
; (MPLibrary function is a simple wrapper.)
|
||||
|
||||
; ARG AreaID r3, NotificationID r4, long r5
|
||||
; RET OSErr r3
|
||||
|
||||
DeclareMPCall 77, MPSetAreaBackingProvider
|
||||
|
||||
MPSetAreaBackingProvider
|
||||
|
||||
_Lock PSA.SchLock, scratch1=r16, scratch2=r17
|
||||
|
||||
; Expect Area ID in r3
|
||||
mr r8, r3
|
||||
|
||||
; r8 = id
|
||||
bl LookupID
|
||||
cmpwi r9, Area.kIDClass
|
||||
|
||||
bne+ ReleaseAndReturnMPCallInvalidIDErr
|
||||
mr r31, r8
|
||||
mr. r8, r4
|
||||
beq- MPCall_77_0x40
|
||||
|
||||
; r8 = id
|
||||
; r4 optionally contains...
|
||||
mr. r8, r4
|
||||
beq- @no_notification
|
||||
|
||||
; a Notification ID
|
||||
bl LookupID
|
||||
cmpwi r9, Notification.kIDClass
|
||||
|
||||
bne+ ReleaseAndReturnMPCallInvalidIDErr
|
||||
@no_notification
|
||||
|
||||
MPCall_77_0x40
|
||||
stw r4, 0x0018(r31)
|
||||
stw r5, 0x0084(r31)
|
||||
stw r4, Area.BackingProviderID(r31)
|
||||
stw r5, Area.BackingProviderMisc(r31)
|
||||
|
||||
; r1 = kdp
|
||||
b ReleaseAndReturnZeroFromMPCall
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue