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git-svn-id: https://spexeah.com:8443/svn/Asuro@176 6dbc8c32-bb84-406f-8558-d1cf31a0ab0c
This commit is contained in:
kieron
2017-05-22 00:49:38 +00:00
parent f1dc0516df
commit 5a2004b486
15 changed files with 104 additions and 20 deletions
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57
src/tss.pas
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@ -17,9 +17,9 @@ uses
console;
type
{
{TTaskStateSegment = packed record
Res1 : uint16;
IOPBOffset : uint16;
IOMap : uint16;
LDTR : uint16;
Res2 : uint16;
GS : uint16;
@ -54,8 +54,9 @@ type
ESP0 : uint32;
LINK : uint16;
Res12 : uint16;
}
end;
PTaskStateSegment = ^TTaskStateSegment;}
{
Res12 : uint16;
LINK : uint16;
@ -143,6 +144,36 @@ type
end;
PTaskStateSegment = ^TTaskStateSegment;
{TTaskStateSegment = packed record
link : uint32;
esp0 : uint32;
ss0 : uint32;
esp1 : uint32;
ss1 : uint32;
esp2 : uint32;
ss2 : uint32;
cr3 : uint32;
eip : uint32;
eflags : uint32;
eax : uint32;
ecx : uint32;
edx : uint32;
ebx : uint32;
esp : uint32;
ebp : uint32;
esi : uint32;
edi : uint32;
es : uint32;
cs : uint32;
ss : uint32;
ds : uint32;
fs : uint32;
gs : uint32;
ldt : uint32;
iomap : uint32;
end;
PTaskStateSegment = ^TTaskStateSegment;}
var
TaskStateSegment : TTaskStateSegment;
ptrTaskStateSegment : PTaskStateSegment = @TaskStateSegment;
@ -154,15 +185,27 @@ implementation
procedure init;
var
cESP : uint32;
cCR3 : uint32;
begin
ptrTaskStateSegment^.ss0:= $10;
ptrTaskStateSegment^.iomap:= sizeof(TTaskStateSegment);
gdt.set_gate($05, uint32(ptrTaskStateSegment) - KERNEL_VIRTUAL_BASE, sizeof(TTaskStateSegment), $89, $40); //OFFSET: 40
console.writehexln(uint32(ptrTaskStateSegment));
ptrTaskStateSegment^.ss0:= $08;
ptrTaskStateSegment^.iomap:= sizeof(TTaskStateSegment)-1;
asm
MOV cESP, ESP
MOV EAX, CR3
MOV cCR3, EAX
end;
console.writewordln(sizeof(TTaskStateSegment));
ptrTaskStateSegment^.esp0:= cESP;
//ptrTaskStateSegment^.CR3:= cCR3;
console.writestring('OLD LIMIT: ');
console.writewordln(gdt.gdt_pointer.limit);
//gdt.set_gate($05, uint32(ptrTaskStateSegment)-KERNEL_VIRTUAL_BASE, sizeof(TTaskStateSegment)-1, $89, $40); //OFFSET: 40
console.writestring('NEW LIMIT: ');
console.writewordln(gdt.gdt_pointer.limit);
gdt.reload;
while true do begin end;
console.writestringln('A');
asm
mov AX, 40