32bit protected mode init problem

[egos]

dw gdt_end - gdt - 1

It seems to me that should be: dw gdt_end - gdt + 1.

No. GDT_SIZE = GDT_END-GDT, GDT_LIMIT = GDT_SIZE-1.

Code: Select all

[bits 32]         ;before jump

No comments...

[Casm]

Are you sure ds has got zero in it when your code gets control?

[czlowieczek]

Ok, I'm finally in 32 bit protected mode, thank you guys for help

part of my log in bosch:

00104800000p[WGUI ] >>PANIC<< POWER button turned off.
00104800000i[CPU0 ] CPU is in protected mode (active)
00104800000i[CPU0 ] CS.mode = 32 bit
00104800000i[CPU0 ] SS.mode = 32 bit
00104800000i[CPU0 ] EFER = 0x00000000
00104800000i[CPU0 ] | EAX=00000010 EBX=00000002 ECX=00090010 EDX=00000000
00104800000i[CPU0 ] | ESP=00008000 EBP=00000000 ESI=000e0203 EDI=00000200
00104800000i[CPU0 ] | IOPL=0 id vip vif ac vm rf nt of df if tf sf ZF af PF cf
00104800000i[CPU0 ] | SEG sltr(index|ti|rpl) base limit G D
00104800000i[CPU0 ] | CS:0008( 0001| 0| 0) 00000000 ffffffff 1 1
00104800000i[CPU0 ] | DS:0010( 0002| 0| 0) 00000000 ffffffff 1 1
00104800000i[CPU0 ] | SS:0010( 0002| 0| 0) 00000000 ffffffff 1 1
00104800000i[CPU0 ] | ES:0010( 0002| 0| 0) 00000000 ffffffff 1 1
00104800000i[CPU0 ] | FS:0010( 0002| 0| 0) 00000000 ffffffff 1 1
00104800000i[CPU0 ] | GS:0010( 0002| 0| 0) 00000000 ffffffff 1 1
00104800000i[CPU0 ] | EIP=00000553 (00000553)
00104800000i[CPU0 ] | CR0=0x60000011 CR2=0x00000000
00104800000i[CPU0 ] | CR3=0x00000000 CR4=0x00000000
00104800000i[CPU0 ] 0x0000000000000553>> jmp .-2 (0x00000553) : EBFE

Every segment is loaded and cs is loaded good.
(Last jump is in infinite loop)
Thank you again