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phnt: fix ALPC structure layouts #2982

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Merged
dmex merged 2 commits into from
Jul 9, 2026
+31 −20
Merged

phnt: fix ALPC structure layouts #2982

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404e806
phnt: fix ALPC structure layouts
RatinCN Jul 8, 2026
d84d608
Merge branch 'master' into fix-alpc-structure-layouts
dmex Jul 9, 2026
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51 changes: 31 additions & 20 deletions phnt/include/ntlpcapi.h
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Original file line number Diff line number Diff line change
Expand Up @@ -700,41 +700,52 @@ typedef struct _ALPC_CONTEXT_ATTR
// begin_rev
#define ALPC_HANDLEFLG_DUPLICATE_SAME_ACCESS 0x10000
#define ALPC_HANDLEFLG_DUPLICATE_SAME_ATTRIBUTES 0x20000
#define ALPC_HANDLEFLG_INDIRECT 0x40000
#define ALPC_HANDLEFLG_DUPLICATE_INHERIT 0x80000
// end_rev

#define ALPC_INDIRECT_HANDLE_MAX 512

// private
typedef struct _ALPC_HANDLE_ATTR32
{
ULONG Flags;
ULONG Reserved0;
ULONG SameAccess;
ULONG SameAttributes;
ULONG Indirect;
ULONG Inherit;
ULONG Reserved1;
ULONG Handle;
ULONG ObjectType; // ObjectTypeCode, not ObjectTypeIndex
ACCESS_MASK DesiredAccess;
ACCESS_MASK GrantedAccess;
} ALPC_HANDLE_ATTR32, *PALPC_HANDLE_ATTR32;

// private
typedef struct _ALPC_HANDLE_ATTR
{
ULONG Flags;
ULONG Reserved0;
ULONG SameAccess;
ULONG SameAttributes;
ULONG Indirect;
ULONG Inherit;
ULONG Reserved1;
HANDLE Handle;
PALPC_HANDLE_ATTR32 HandleAttrArray;
ULONG ObjectType; // ObjectTypeCode, not ObjectTypeIndex
ULONG HandleCount;
ACCESS_MASK DesiredAccess;
ACCESS_MASK GrantedAccess;
union
{
ULONG Flags;
struct
{
ULONG Reserved0 : 16;
ULONG SameAccess : 1;
ULONG SameAttributes : 1;
ULONG Indirect : 1;
ULONG Inherit : 1;
ULONG Reserved1 : 12;
};
};

union
{
struct
{
HANDLE Handle;
ULONG ObjectType; // ObjectTypeCode, not ObjectTypeIndex
ACCESS_MASK DesiredAccess;
};
struct
{
PALPC_HANDLE_ATTR32 HandleAttrArray;
ULONG HandleCount;
};
};
} ALPC_HANDLE_ATTR, *PALPC_HANDLE_ATTR;

/*
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