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New kernel stack, fixing pmem alloc bug, updated to maintain free page positions
[tpg/acess2.git]
/
Kernel
/
arch
/
x86_64
/
start64.asm
diff --git
a/Kernel/arch/x86_64/start64.asm
b/Kernel/arch/x86_64/start64.asm
index
c98afdb
..
33c77d6
100644
(file)
--- a/
Kernel/arch/x86_64/start64.asm
+++ b/
Kernel/arch/x86_64/start64.asm
@@
-2,9
+2,13
@@
; Acess2 x86_64 Port
;
[bits 64]
; Acess2 x86_64 Port
;
[bits 64]
+KERNEL_BASE equ 0xFFFF800000000000
[extern kmain]
[extern kmain]
+[extern gMultibootPtr]
+[extern gMultibootMagic]
+
[section .text]
[global start64]
start64:
[section .text]
[global start64]
start64:
@@
-30,6
+34,8
@@
start64:
mov rsp, gInitialKernelStack
; Call main
mov rsp, gInitialKernelStack
; Call main
+ mov edi, [gMultibootMagic - KERNEL_BASE]
+ mov esi, [gMultibootPtr - KERNEL_BASE]
call kmain
cli
call kmain
cli
@@
-44,10
+50,10
@@
GetRIP:
[global GetCPUNum]
GetCPUNum:
[global GetCPUNum]
GetCPUNum:
- str ax
- mov gs, ax
xor rax, rax
xor rax, rax
- mov al, [gs:104] ; End of TSS
+ str ax
+ sub ax, 0x38 ; TSS Base
+ shr ax, 4 ; One 16-byte TSS per CPU
ret
KSTACK_USERSTATE_SIZE equ (16+1+5)*8 ; GPRegs, CPU, IRET
ret
KSTACK_USERSTATE_SIZE equ (16+1+5)*8 ; GPRegs, CPU, IRET
@@
-121,6
+127,6
@@
User_Syscall_Exit:
[section .bss]
[global gInitialKernelStack]
[section .bss]
[global gInitialKernelStack]
- resd 1024*
1 ; 1 Page
+ resd 1024*
4 ; 4 Pages
gInitialKernelStack:
gInitialKernelStack:
UCC
git Repository :: git.ucc.asn.au