problem with task switching

[yemista]

when I call schedule from the kernel, tasks switch properly and I have no problems, however, whenever I put the call to schedule in a timer callback, I get a page fault. Any suggestions as to what to look into? here is the code for my proc switch function

Code: Select all

asm_proc_switch:
	mov eax, [esp + 8]
        mov [eax], ebx
        mov [eax + 4], esi
        mov [eax + 8], edi	
	mov [eax + 12], esp	
	mov [eax + 16], ebp
	mov ecx, [esp]
	mov [eax + 24], ecx
	;; second half
	mov eax, [esp + 4]
        mov ebx, [eax]
        mov esi, [eax + 4]
        mov edi, [eax + 8]
	mov esp, [eax + 12]
	mov ebp, [eax + 16]
        mov ecx, [eax + 24]
	mov [esp], ecx
        ret

the stack copies correctly and I verified this by printing each processes pid.

[djsilence]

are all registers in your timer IRQ stored correctly?

see, if you get page fault it means then you return not to that place, where you started "your trip"...

Daniel.