[reactos] 04/06: [NTOS:KE] Implement the internal FPU state context structure

[George Bișoc]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=c020966091e85cfe1f827…

commit c020966091e85cfe1f827f0b7d40be23c416317c
Author:     George Bișoc <george.bisoc(a)reactos.org>
AuthorDate: Tue Jan 25 13:17:49 2022 +0100
Commit:     George Bișoc <george.bisoc(a)reactos.org>
CommitDate: Tue May 24 18:39:45 2022 +0200

    [NTOS:KE] Implement the internal FPU state context structure
    
    This is needed to store FPU state information when saving or restoring the floating
point state of a system due to a call to KeSaveFloatingPointState or
KeRestoreFloatingPointState.
---
 ntoskrnl/include/internal/i386/ke.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/ntoskrnl/include/internal/i386/ke.h b/ntoskrnl/include/internal/i386/ke.h
index 95242fdbfa0..cdeba9ab87d 100644
--- a/ntoskrnl/include/internal/i386/ke.h
+++ b/ntoskrnl/include/internal/i386/ke.h
@@ -235,6 +235,17 @@ typedef struct _LARGE_IDENTITY_MAP
     PVOID PagesList[30];
 } LARGE_IDENTITY_MAP, *PLARGE_IDENTITY_MAP;
 
+//
+// Floating Point Internal Context Structure
+//
+typedef struct _FLOATING_SAVE_CONTEXT
+{
+    PKTHREAD CurrentThread;
+    KIRQL OldNpxIrql;
+    PFX_SAVE_AREA Buffer;
+    PFX_SAVE_AREA PfxSaveArea;
+} FLOATING_SAVE_CONTEXT, *PFLOATING_SAVE_CONTEXT;
+
 /* Diable interrupts and return whether they were enabled before */
 FORCEINLINE
 BOOLEAN