| ; ----------------------------------------------------------------------- |
| ; |
| ; Copyright 2005-2008 H. Peter Anvin - All Rights Reserved |
| ; Copyright 2009-2010 Intel Corporation; author: H. Peter Anvin |
| ; |
| ; This program is free software; you can redistribute it and/or modify |
| ; it under the terms of the GNU General Public License as published by |
| ; the Free Software Foundation, Inc., 53 Temple Place Ste 330, |
| ; Boston MA 02111-1307, USA; either version 2 of the License, or |
| ; (at your option) any later version; incorporated herein by reference. |
| ; |
| ; ----------------------------------------------------------------------- |
| |
| ; |
| ; stack.inc |
| ; |
| ; How to reset the stack pointer |
| ; |
| |
| %ifndef _STACK_INC |
| %define _STACK_INC |
| |
| ; |
| ; This macro resets the stack pointer (including SS), and sets |
| ; DS == ES == 0, interrupts on, DF = 0. |
| ; |
| ; It takes a 16-bit register that can be safely clobbered as parameter. |
| ; |
| %macro RESET_STACK_AND_SEGS 1 |
| xor %1,%1 |
| mov ds,%1 |
| mov es,%1 |
| lss esp,[BaseStack] |
| mov dword [PMESP],__stack_end ; Reset PM stack |
| sti |
| cld |
| %endmacro |
| |
| section .data16 |
| alignz 4 |
| global BaseStack:data hidden |
| BaseStack dd StackHome ; ESP of the "home" stack pointer |
| dw 0 ; SS of the "home" stack pointer |
| |
| section .text16 |
| |
| %endif ; _STACK_INC |
