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git-svn-id: https://spexeah.com:8443/svn/Asuro@172 6dbc8c32-bb84-406f-8558-d1cf31a0ab0c
This commit is contained in:
kieron
2017-05-21 20:45:05 +00:00
parent b7d7f17c3a
commit 781914b160
9 changed files with 93 additions and 23 deletions
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116
src/tss.pas
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@ -17,7 +17,7 @@ uses
console;
type
TTaskStateSegment = packed record
{
Res1 : uint16;
IOPBOffset : uint16;
LDTR : uint16;
@ -54,6 +54,92 @@ type
ESP0 : uint32;
LINK : uint16;
Res12 : uint16;
}
{
Res12 : uint16;
LINK : uint16;
ESP0 : uint32;
Res11 : uint16;
SS0 : uint16;
Res10 : uint16;
SS1 : uint16;
Res9 : uint16;
SS2 : uint16;
CR3 : uint32;
EIP : uint32;
EFLAGS : uint32;
EAX : uint32;
ECX : uint32;
EDX : uint32;
EBX : uint32;
ESP : uint32;
EBP : uint32;
ESI : uint32;
EDI : uint32;
Res8 : uint16;
ES : uint16;
Res7 : uint16;
CS : uint16;
Res6 : uint16;
SS : uint16;
Res5 : uint16;
DS : uint16;
Res4 : uint16;
FS : uint16;
Res3 : uint16;
GS : uint16;
Res2 : uint16;
LDTR : uint16;
IOPBOffset : uint16;
Res1 : uint16;
}
TTaskStateSegment = packed record
link : uint16;
link_h : uint16;
esp0 : uint32;
ss0 : uint16;
ss0_h : uint16;
esp1 : uint32;
ss1 : uint16;
ss1_h : uint16;
esp2 : uint32;
ss2 : uint16;
ss2_h : uint16;
cr3 : uint32;
eip : uint32;
eflags : uint32;
eax : uint32;
ecx : uint32;
edx : uint32;
ebx : uint32;
esp : uint32;
ebp : uint32;
esi : uint32;
edi : uint32;
es : uint16;
es_h : uint16;
cs : uint16;
cs_h : uint16;
ss : uint16;
ss_h : uint16;
ds : uint16;
ds_h : uint16;
fs : uint16;
fs_h : uint16;
gs : uint16;
gs_h : uint16;
ldt : uint16;
ldt_h : uint16;
trap : uint16;
iomap : uint16;
end;
PTaskStateSegment = ^TTaskStateSegment;
@ -67,38 +153,22 @@ implementation
procedure init;
var
i : uint32;
cESP : uint32;
begin
console.writestringln('A');
i:=KERNEL_PAGE_NUMBER+4;
console.writestringln('B');
while not vmemorymanager.new_page(i) do begin
i:= i + 1;
end;
console.writestringln('C');
ptrTaskStateSegment:= PTaskStateSegment(i SHL 22);
console.writestringln('D');
ptrTaskStateSegment^.SS0:= $10;
console.writestringln('E');
ptrTaskStateSegment^.ESP0:= $00;
console.writestringln('F');
ptrTaskStateSegment^.IOPBOffset:= sizeof(TTaskStateSegment);
console.writestringln('G');
gdt.set_gate($05, i SHL 22 - KERNEL_VIRTUAL_BASE, sizeof(TTaskStateSegment), $89, $40); //OFFSET: 40
console.writestringln('H');
ptrTaskStateSegment^.ss0:= $10;
ptrTaskStateSegment^.iomap:= sizeof(TTaskStateSegment);
gdt.set_gate($05, uint32(ptrTaskStateSegment) - KERNEL_VIRTUAL_BASE, sizeof(TTaskStateSegment), $89, $40); //OFFSET: 40
asm
MOV cESP, ESP
end;
console.writestringln('I');
ptrTaskStateSegment^.ESP0:= cESP;
console.writestringln('J');
ptrTaskStateSegment^.esp0:= cESP;
console.writestringln('A');
asm
mov AX, 40
ltr AX
end;
console.writestringln('K');
console.writestringln('B');
end;
end.