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annotate packages/hal/synth/i386linux/current/include/arch.inc @ 161:ac086aa3217e

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Merge from eCos master repository on 2001-06-08-21:11:51-BST
author jlarmour
date Sun, 10 Jun 2001 19:35:23 +0000
parents
children 3902ef905c9c
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1 ##=============================================================================
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2 ##
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3 ## arch.inc
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4 ##
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5 ## i386 assembler header file for the synthetic target
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6 ##
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7 ##=============================================================================
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8 #####COPYRIGHTBEGIN####
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9 #
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10 # -------------------------------------------
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11 # The contents of this file are subject to the Red Hat eCos Public License
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12 # Version 1.1 (the "License"); you may not use this file except in
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13 # compliance with the License. You may obtain a copy of the License at
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14 # http://www.redhat.com/
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15 #
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16 # Software distributed under the License is distributed on an "AS IS"
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17 # basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 # License for the specific language governing rights and limitations under
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19 # the License.
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20 #
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21 # The Original Code is eCos - Embedded Configurable Operating System,
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22 # released September 30, 1998.
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23 #
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24 # The Initial Developer of the Original Code is Red Hat.
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25 # Portions created by Red Hat are
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26 # Copyright (C) 1998, 1999, 2000, 2001 Red Hat, Inc.
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27 # All Rights Reserved.
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28 # -------------------------------------------
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29 #
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30 #####COPYRIGHTEND####
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31 ##=============================================================================
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32 #######DESCRIPTIONBEGIN####
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33 ##
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34 ## Author(s): jskov
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35 ## Contributors:jskov, nickg, bartv
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36 ## Date: 1999-01-20
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37 ## Purpose: i386 definitions.
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38 ## Description: This file contains various definitions and macros that are
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39 ## useful for writing assembly code for the i386
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40 ## Usage:
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41 ## #include <cyg/hal/arch.inc>
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42 ## ...
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43 ##
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44 ##
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45 ######DESCRIPTIONEND####
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46 ##
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47 ##=============================================================================
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48
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49 #------------------------------------------------------------------------------
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50 # Exception, interrupt and thread context save area layout
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51 # The layout of this structure is also defined in "hal_arch.h", for C
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52 # code. Do not change this without changing that (or vice versa).
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53
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54 # See SYSV ABI4, i386 supplement (page 37-38)
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55 # http://www.sco.com/products/layered/develop/devspecs/abi386-4.pdf
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56
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57 # Callee save registers (eax, ecx, and edx are scratch registers)
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58 .equ i386reg_esp, 0
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59 .equ i386reg_next_context, 4 # only used when dropping through...
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60 .equ i386reg_ebp, 8 # ...from switch_ to load_context.
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61 .equ i386reg_ebx, 12
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62 .equ i386reg_esi, 16
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63 .equ i386reg_edi, 20
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64 .equ i386reg_context_size, 24
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65
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66 #------------------------------------------------------------------------------
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67 # end of arch.inc