FUUUUUUUUUUUUUUUUUUUUUUU
git-svn-id: https://spexeah.com:8443/svn/Asuro@176 6dbc8c32-bb84-406f-8558-d1cf31a0ab0c
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kieron
parent
f1dc0516df
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BIN
bin/kernel.bin
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bin/kernel.bin
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lib/gdt.ppu
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lib/gdt.ppu
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lib/isr13.ppu
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lib/isr13.ppu
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lib/kernel.ppu
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lib/kernel.ppu
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lib/libpsystem.a
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lib/libpsystem.a
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lib/tss.ppu
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lib/tss.ppu
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42
src/gdt.pas
42
src/gdt.pas
@ -15,7 +15,7 @@ uses
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console;
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type
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TGDT_Entry = bitpacked record
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TGDT_Entry = packed record
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limit_low : uint16;
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base_low : uint16;
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base_middle : uint8;
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@ -25,17 +25,19 @@ type
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end;
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PGDT_Entry = ^TGDT_Entry;
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TGDT_Pointer = bitpacked record
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TGDT_Pointer = packed record
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limit : uint16;
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base : uint32;
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end;
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var
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gdt_entries : array[0..4] of TGDT_Entry;
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gdt_entries : array[0..6] of TGDT_Entry;
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gdt_pointer : TGDT_Pointer;
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procedure init();
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procedure set_gate(Gate_Number : uint32; Base : uint32; Limit : uint32; Access : uint8; Granularity : uint8);
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procedure flush;
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procedure reload;
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implementation
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@ -54,8 +56,35 @@ asm
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@@flush: // It's just data, honest gov'.
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end;
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procedure set_gate(Gate_Number : uint32; Base : uint32; Limit : uint32; Access : uint8; Granularity : uint8);
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procedure flush;
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begin
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console.writestringln('GDT: FLUSH.');
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flush_gdt(uint32(@gdt_pointer));
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end;
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procedure reload_gdt(gdt_ptr : uint32); assembler;
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asm
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MOV EAX, gdt_ptr
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LGDT [EAX]
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end;
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procedure reload;
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begin
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reload_gdt(uint32(@gdt_pointer));
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end;
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procedure set_gate(Gate_Number : uint32; Base : uint32; Limit : uint32; Access : uint8; Granularity : uint8);
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var
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lLimit : uint32;
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begin
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lLimit:= (Gate_Number + 1) * 8;
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lLimit:= lLimit - 1;
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writestring('lLimit: ');
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writewordln(lLimit);
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if lLimit > gdt_pointer.limit then begin
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gdt_pointer.limit:= lLimit;
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end;
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gdt_entries[Gate_Number].base_low := (Base AND $FFFF);
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gdt_entries[Gate_Number].base_middle := (Base SHR 16) AND $FF;
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gdt_entries[Gate_Number].base_high := (Base SHR 24) AND $FF;
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@ -70,15 +99,14 @@ end;
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procedure init();
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begin
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console.writestringln('GDT: INIT START.');
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gdt_pointer.limit := (sizeof(TGDT_Entry) * 5) - 1;
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gdt_pointer.limit:= 0;
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gdt_pointer.base := uint32(@gdt_entries);
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set_gate($00, $00, $00, $00, $00); //OFFSET: 0
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set_gate($01, $00, $FFFFFFFF, $9A, $CF); //OFFSET: 8
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set_gate($02, $00, $FFFFFFFF, $92, $CF); //OFFSET: 16
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set_gate($03, $00, $FFFFFFFF, $FA, $CF); //OFFSET: 24
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set_gate($04, $00, $FFFFFFFF, $F2, $CF); //OFFSET: 32
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console.writestringln('GDT: FLUSH.');
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flush_gdt(uint32(@gdt_pointer));
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flush;
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console.writestringln('GDT: INIT END.');
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end;
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@ -28,14 +28,21 @@ var
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procedure Main(); interrupt;
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var
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i : integer;
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i : integer;
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ec : uint32;
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begin
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asm
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MOV EAX, [ESP-4]
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MOV ec, EAX
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end;
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CLI;
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for i:=0 to MAX_HOOKS-1 do begin
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if uint32(Hooks[i]) <> 0 then Hooks[i](void(13));
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end;
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console.writestringln('General Protection Fault.');
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console.writestring('General Protection Fault. [');
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console.writehex(ec);
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console.writestringln(']');
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util.halt_and_catch_fire;
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end;
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@ -42,6 +42,7 @@ var
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pint2 : puint32;
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keyboard_layout : array [0..1] of TKeyInfo;
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i : uint32;
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cEIP : uint32;
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begin
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multibootinfo:= mbinfo;
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@ -51,6 +52,10 @@ begin
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console.writestringln('Booting Asuro...');
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for i:=0 to 100000000 do begin
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end;
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if (multibootmagic <> MULTIBOOT_BOOTLOADER_MAGIC) then begin
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console.setdefaultattribute(console.combinecolors(Red, Black));
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console.writestringln('Multiboot Compliant Boot-Loader Needed!');
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@ -62,12 +67,13 @@ begin
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idt.init();
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isr.init();
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irq.init();
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tss.init();
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pmemorymanager.init();
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vmemorymanager.init();
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lmemorymanager.init();
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tss.init();
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scheduler.init();
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while true do begin end;
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STI;
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55
src/tss.pas
55
src/tss.pas
@ -17,9 +17,9 @@ uses
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console;
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type
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{
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{TTaskStateSegment = packed record
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Res1 : uint16;
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IOPBOffset : uint16;
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IOMap : uint16;
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LDTR : uint16;
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Res2 : uint16;
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GS : uint16;
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@ -54,7 +54,8 @@ type
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ESP0 : uint32;
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LINK : uint16;
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Res12 : uint16;
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}
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end;
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PTaskStateSegment = ^TTaskStateSegment;}
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{
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Res12 : uint16;
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@ -143,6 +144,36 @@ type
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end;
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PTaskStateSegment = ^TTaskStateSegment;
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{TTaskStateSegment = packed record
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link : uint32;
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esp0 : uint32;
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ss0 : uint32;
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esp1 : uint32;
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ss1 : uint32;
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esp2 : uint32;
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ss2 : uint32;
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cr3 : uint32;
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eip : uint32;
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eflags : uint32;
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eax : uint32;
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ecx : uint32;
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edx : uint32;
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ebx : uint32;
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esp : uint32;
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ebp : uint32;
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esi : uint32;
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edi : uint32;
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es : uint32;
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cs : uint32;
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ss : uint32;
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ds : uint32;
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fs : uint32;
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gs : uint32;
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ldt : uint32;
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iomap : uint32;
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end;
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PTaskStateSegment = ^TTaskStateSegment;}
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var
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TaskStateSegment : TTaskStateSegment;
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ptrTaskStateSegment : PTaskStateSegment = @TaskStateSegment;
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@ -154,15 +185,27 @@ implementation
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procedure init;
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var
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cESP : uint32;
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cCR3 : uint32;
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begin
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ptrTaskStateSegment^.ss0:= $10;
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ptrTaskStateSegment^.iomap:= sizeof(TTaskStateSegment);
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gdt.set_gate($05, uint32(ptrTaskStateSegment) - KERNEL_VIRTUAL_BASE, sizeof(TTaskStateSegment), $89, $40); //OFFSET: 40
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console.writehexln(uint32(ptrTaskStateSegment));
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ptrTaskStateSegment^.ss0:= $08;
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ptrTaskStateSegment^.iomap:= sizeof(TTaskStateSegment)-1;
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asm
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MOV cESP, ESP
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MOV EAX, CR3
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MOV cCR3, EAX
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end;
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console.writewordln(sizeof(TTaskStateSegment));
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ptrTaskStateSegment^.esp0:= cESP;
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//ptrTaskStateSegment^.CR3:= cCR3;
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console.writestring('OLD LIMIT: ');
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console.writewordln(gdt.gdt_pointer.limit);
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//gdt.set_gate($05, uint32(ptrTaskStateSegment)-KERNEL_VIRTUAL_BASE, sizeof(TTaskStateSegment)-1, $89, $40); //OFFSET: 40
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console.writestring('NEW LIMIT: ');
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console.writewordln(gdt.gdt_pointer.limit);
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gdt.reload;
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while true do begin end;
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console.writestringln('A');
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asm
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mov AX, 40
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