Triple Fault While Enabling Higher Half Kernel

0

I get a triple fault when i try to enable Higher Half Kernel in my OS. Basically this is my linker.ld:

/* The bootloader will look at this image and start execution at the symbol
   designated as the entry point. */
ENTRY(loader)

SECTIONS {
   /* The kernel will live at 3GB + 1MB in the virtual
      address space, which will be mapped to 1MB in the
      physical address space. */
   . = 0xC0100000;

   .text ALIGN (0x1000) : AT(ADDR(.text) - 0xC0000000) {
       *(.multiboot)
       *(.text)
       *(.rodata*)
   }

   .data ALIGN (0x1000) : AT(ADDR(.data) - 0xC0000000) {
        start_ctors = .;
        KEEP(*( .init_array ));
        KEEP(*(SORT_BY_INIT_PRIORITY( .init_array.* )));
        end_ctors = .;
        *(.data)
   }

   .bss : AT(ADDR(.bss) - 0xC0000000) {
       _sbss = .;
       *(COMMON)
       *(.bss)
       _ebss = .;
   }
}

boot.asm:

    ;Global MultiBoot Kernel Recongnzation
MAGIC equ 0x1badb002
FLAGS equ (1<<0 | 1<<1)
CHECKSUM equ -(MAGIC + FLAGS)


;Putting in object file
section .multiboot
    dd MAGIC
    dd FLAGS
    dd CHECKSUM




section .data

KERNEL_VIRTUAL_BASE equ 0xC0000000                  ; 3GB
KERNEL_PAGE_NUMBER equ (KERNEL_VIRTUAL_BASE >> 22)  ; Page directory index of kernel's 4MB PTE.

align 0x1000
BootPageDirectory:
    ; This page directory entry identity-maps the first 4MB of the 32-bit physical address space.
    ; All bits are clear except the following:
    ; bit 7: PS The kernel page is 4MB.
    ; bit 1: RW The kernel page is read/write.
    ; bit 0: P  The kernel page is present.
    ; This entry must be here -- otherwise the kernel will crash immediately after paging is
    ; enabled because it can't fetch the next instruction! It's ok to unmap this page later.
    dd 0x00000083
    times (KERNEL_PAGE_NUMBER - 1) dd 0                 ; Pages before kernel space.
    ; This page directory entry defines a 4MB page containing the kernel.
    dd 0x00000083
    times (1024 - KERNEL_PAGE_NUMBER - 1) dd 0  ; Pages after the kernel image.


section .text
    extern kernelMain
    extern callConstructors
    extern page_directory
    extern pages_init
    ; reserve initial kernel stack space -- that's 16k.
    STACKSIZE equ 0x4000
    ; setting up entry point for linker
    loader equ (_loader - 0xC0000000)
    global loader

        _loader:
                ;Enable Paging START

                    ; NOTE: Until paging is set up, the code must be position-independent and use physical
                    ; addresses, not virtual ones!
                    mov ecx, (BootPageDirectory - KERNEL_VIRTUAL_BASE)
                    mov cr3, ecx                                        ; Load Page Directory Base Register.

                    mov ecx, cr4
                    or ecx, 0x00000010                          ; Set PSE bit in CR4 to enable 4MB pages.
                    mov cr4, ecx

                    mov ecx, cr0
                    or ecx, 0x80000000                          ; Set PG bit in CR0 to enable paging.
                    mov cr0, ecx


                    lea ecx, [higherhalf]
                    jmp ecx

        higherhalf:
                ; Unmap the identity-mapped first 4MB of physical address space. It should not be needed
                ; anymore.
                mov dword [BootPageDirectory], 0
                invlpg [0]

                mov esp, stack           ; set up the stack
                call callConstructors

                push eax
                push ebx
                call kernelMain

        _eof:
             cli
             hlt 
             jmp _eof


section .bss
align 32
stack:
    resb STACKSIZE      ; reserve 16k stack on a uint64_t boundary

I tried debugging it and i get this in my qemu.log(cut down to last part of log, where check_exceptions occur):

Trace 0x7f99594ba2c0 [001023ed] 
check_exception old: 0xffffffff new 0xe
     0: v=0e e=0000 i=0 cpl=0 IP=0008:001023f9 pc=001023f9 SP=0010:00006f08 CR2=001023f9
EAX=00106000 EBX=80000011 ECX=001023e0 EDX=003ff003
ESI=00000000 EDI=00111000 EBP=00000000 ESP=00006f08
EIP=001023f9 EFL=00000086 [--S--P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00cf9300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00cf9a00 DPL=0 CS32 [-R-]
SS =0010 00000000 ffffffff 00cf9300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00cf9300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00cf9300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00cf9300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000cb268 00000027
IDT=     00000000 000003ff
CR0=80000011 CR2=001023f9 CR3=00106000 CR4=00000000
DR0=00000000 DR1=00000000 DR2=00000000 DR3=00000000 
DR6=ffff0ff0 DR7=00000400
CCS=000003ff CCD=80000011 CCO=LOGICL  
EFER=0000000000000000
check_exception old: 0xe new 0xd
     1: v=08 e=0000 i=0 cpl=0 IP=0008:001023f9 pc=001023f9 SP=0010:00006f08 env->regs[R_EAX]=00106000
EAX=00106000 EBX=80000011 ECX=001023e0 EDX=003ff003
ESI=00000000 EDI=00111000 EBP=00000000 ESP=00006f08
EIP=001023f9 EFL=00000086 [--S--P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00cf9300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00cf9a00 DPL=0 CS32 [-R-]
SS =0010 00000000 ffffffff 00cf9300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00cf9300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00cf9300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00cf9300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000cb268 00000027
IDT=     00000000 000003ff
CR0=80000011 CR2=001023f9 CR3=00106000 CR4=00000000
DR0=00000000 DR1=00000000 DR2=00000000 DR3=00000000 
DR6=ffff0ff0 DR7=00000400
CCS=000003ff CCD=80000011 CCO=LOGICL  
EFER=0000000000000000
check_exception old: 0x8 new 0xd
Triple fault

If you want to see my full source code, to investigate this problem more here it is: https://github.com/amanuel2/OS_Mirror . Here is where i got the tutorial from: http://wiki.osdev.org/Higher_Half_x86_Bare_Bones . Help would be appreciated!

assembly
linker
x86
paging
osdev
asked on Stack Overflow Aug 16, 2016 by amanuel2

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