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Implement HlLoadSegment() intrinsics routine
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This commit is contained in:
Rafal Kupiec 2023-01-24 19:27:18 +01:00
parent d3d8d144a0
commit 35aa514f95
Signed by: belliash
GPG Key ID: 4E829243E0CFE6B4
4 changed files with 116 additions and 0 deletions
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5
sdk/xtdk/amd64/hlfuncs.h
View File

@ -63,6 +63,11 @@ XTCDECL
VOID
HlLoadGlobalDescriptorTable(IN PVOID Source);
XTCDECL
VOID
HlLoadSegment(IN USHORT Segment,
IN PVOID Source);
XTCDECL
VOID
HlLoadTaskRegister(USHORT Source);

5
sdk/xtdk/i686/hlfuncs.h
View File

@ -63,6 +63,11 @@ XTCDECL
VOID
HlLoadGlobalDescriptorTable(IN PVOID Source);
XTCDECL
VOID
HlLoadSegment(IN USHORT Segment,
IN PVOID Source);
XTCDECL
VOID
HlLoadTaskRegister(USHORT Source);

53
xtoskrnl/hl/amd64/cpufunc.c
View File

@ -256,6 +256,59 @@ HlLoadGlobalDescriptorTable(IN PVOID Source)
: "memory");
}
/**
* Loads source data into specified segment.
*
* @param Segment
* Supplies a segment identification.
*
* @param Source
* Supplies a pointer to the memory area containing data that will be loaded into specified segment.
*
* @return This routine does not return any value.
*
* @since XT 1.0
*/
XTCDECL
VOID
HlLoadSegment(IN USHORT Segment,
IN PVOID Source)
{
switch(Segment)
{
case SEGMENT_CS:
asm volatile("movl %0, %%cs"
:
: "r" (Source));
break;
case SEGMENT_DS:
asm volatile("movl %0, %%ds"
:
: "r" (Source));
break;
case SEGMENT_ES:
asm volatile("movl %0, %%es"
:
: "r" (Source));
break;
case SEGMENT_FS:
asm volatile("movl %0, %%fs"
:
: "r" (Source));
break;
case SEGMENT_GS:
asm volatile("movl %0, %%gs"
:
: "r" (Source));
break;
case SEGMENT_SS:
asm volatile("movl %0, %%ss"
:
: "r" (Source));
break;
}
}
/**
* Loads Task Register (TR) with a segment selector that points to TSS.
*

53
xtoskrnl/hl/i686/cpufunc.c
View File

@ -256,6 +256,59 @@ HlLoadGlobalDescriptorTable(IN PVOID Source)
: "memory");
}
/**
* Loads source data into specified segment.
*
* @param Segment
* Supplies a segment identification.
*
* @param Source
* Supplies a pointer to the memory area containing data that will be loaded into specified segment.
*
* @return This routine does not return any value.
*
* @since XT 1.0
*/
XTCDECL
VOID
HlLoadSegment(IN USHORT Segment,
IN PVOID Source)
{
switch(Segment)
{
case SEGMENT_CS:
asm volatile("movl %0, %%cs"
:
: "r" (Source));
break;
case SEGMENT_DS:
asm volatile("movl %0, %%ds"
:
: "r" (Source));
break;
case SEGMENT_ES:
asm volatile("movl %0, %%es"
:
: "r" (Source));
break;
case SEGMENT_FS:
asm volatile("movl %0, %%fs"
:
: "r" (Source));
break;
case SEGMENT_GS:
asm volatile("movl %0, %%gs"
:
: "r" (Source));
break;
case SEGMENT_SS:
asm volatile("movl %0, %%ss"
:
: "r" (Source));
break;
}
}
/**
* Loads Task Register (TR) with a segment selector that points to TSS.
*