segmentation.py revision 8290:3c628a51f6e1
1# Copyright (c) 2007 The Hewlett-Packard Development Company 2# All rights reserved. 3# 4# The license below extends only to copyright in the software and shall 5# not be construed as granting a license to any other intellectual 6# property including but not limited to intellectual property relating 7# to a hardware implementation of the functionality of the software 8# licensed hereunder. You may use the software subject to the license 9# terms below provided that you ensure that this notice is replicated 10# unmodified and in its entirety in all distributions of the software, 11# modified or unmodified, in source code or in binary form. 12# 13# Redistribution and use in source and binary forms, with or without 14# modification, are permitted provided that the following conditions are 15# met: redistributions of source code must retain the above copyright 16# notice, this list of conditions and the following disclaimer; 17# redistributions in binary form must reproduce the above copyright 18# notice, this list of conditions and the following disclaimer in the 19# documentation and/or other materials provided with the distribution; 20# neither the name of the copyright holders nor the names of its 21# contributors may be used to endorse or promote products derived from 22# this software without specific prior written permission. 23# 24# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 25# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 26# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 27# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 28# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 29# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 30# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 34# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35# 36# Authors: Gabe Black 37 38microcode = ''' 39def macroop LGDT_M 40{ 41 .serializing 42 .adjust_env maxOsz 43 44 # Get the limit 45 ld t1, seg, sib, disp, dataSize=2 46 # Get the base 47 ld t2, seg, sib, 'adjustedDisp + 2' 48 wrbase tsg, t2 49 wrlimit tsg, t1 50}; 51 52def macroop LGDT_P 53{ 54 .serializing 55 .adjust_env maxOsz 56 57 rdip t7 58 # Get the limit 59 ld t1, seg, riprel, disp, dataSize=2 60 # Get the base 61 ld t2, seg, riprel, 'adjustedDisp + 2' 62 wrbase tsg, t2 63 wrlimit tsg, t1 64}; 65 66# 67# These versions are for when the original data size was 16 bits. The base is 68# still 32 bits, but the top byte is zeroed before being used. 69# 70 71def macroop LGDT_16_M 72{ 73 .serializing 74 .adjust_env maxOsz 75 76 # Get the limit 77 ld t1, seg, sib, disp, dataSize=2 78 # Get the base 79 ld t2, seg, sib, 'adjustedDisp + 2', dataSize=4 80 zexti t2, t2, 23, dataSize=8 81 wrbase tsg, t2 82 wrlimit tsg, t1 83}; 84 85def macroop LGDT_16_P 86{ 87 .serializing 88 .adjust_env maxOsz 89 90 rdip t7 91 # Get the limit 92 ld t1, seg, riprel, disp, dataSize=2 93 # Get the base 94 ld t2, seg, riprel, 'adjustedDisp + 2', dataSize=4 95 zexti t2, t2, 23, dataSize=8 96 wrbase tsg, t2 97 wrlimit tsg, t1 98}; 99 100def macroop LIDT_M 101{ 102 .serializing 103 .adjust_env maxOsz 104 105 # Get the limit 106 ld t1, seg, sib, disp, dataSize=2 107 # Get the base 108 ld t2, seg, sib, 'adjustedDisp + 2' 109 wrbase idtr, t2 110 wrlimit idtr, t1 111}; 112 113def macroop LIDT_P 114{ 115 .serializing 116 .adjust_env maxOsz 117 118 rdip t7 119 # Get the limit 120 ld t1, seg, riprel, disp, dataSize=2 121 # Get the base 122 ld t2, seg, riprel, 'adjustedDisp + 2' 123 wrbase idtr, t2 124 wrlimit idtr, t1 125}; 126 127# 128# These versions are for when the original data size was 16 bits. The base is 129# still 32 bits, but the top byte is zeroed before being used. 130# 131 132def macroop LIDT_16_M 133{ 134 .serializing 135 .adjust_env maxOsz 136 137 # Get the limit 138 ld t1, seg, sib, disp, dataSize=2 139 # Get the base 140 ld t2, seg, sib, 'adjustedDisp + 2', dataSize=4 141 zexti t2, t2, 23, dataSize=8 142 wrbase idtr, t2 143 wrlimit idtr, t1 144}; 145 146def macroop LIDT_16_P 147{ 148 .serializing 149 .adjust_env maxOsz 150 151 rdip t7 152 # Get the limit 153 ld t1, seg, riprel, disp, dataSize=2 154 # Get the base 155 ld t2, seg, riprel, 'adjustedDisp + 2', dataSize=4 156 zexti t2, t2, 23, dataSize=8 157 wrbase idtr, t2 158 wrlimit idtr, t1 159}; 160 161def macroop LTR_R 162{ 163 .serializing 164 chks reg, t0, TRCheck 165 limm t4, 0, dataSize=8 166 srli t4, reg, 3, dataSize=2 167 ldst t1, tsg, [8, t4, t0], dataSize=8 168 ld t2, tsg, [8, t4, t0], 8, dataSize=8 169 chks reg, t1, TSSCheck 170 wrdh t3, t1, t2 171 wrdl tr, t1, reg 172 wrbase tr, t3, dataSize=8 173 limm t5, (1 << 9) 174 or t1, t1, t5 175 st t1, tsg, [8, t4, t0], dataSize=8 176}; 177 178def macroop LTR_M 179{ 180 .serializing 181 ld t5, seg, sib, disp, dataSize=2 182 chks t5, t0, TRCheck 183 limm t4, 0, dataSize=8 184 srli t4, t5, 3, dataSize=2 185 ldst t1, tsg, [8, t4, t0], dataSize=8 186 ld t2, tsg, [8, t4, t0], 8, dataSize=8 187 chks t5, t1, TSSCheck 188 wrdh t3, t1, t2 189 wrdl tr, t1, t5 190 wrbase tr, t3, dataSize=8 191 limm t5, (1 << 9) 192 or t1, t1, t5 193 st t1, tsg, [8, t4, t0], dataSize=8 194}; 195 196def macroop LTR_P 197{ 198 .serializing 199 rdip t7 200 ld t5, seg, riprel, disp, dataSize=2 201 chks t5, t0, TRCheck 202 limm t4, 0, dataSize=8 203 srli t4, t5, 3, dataSize=2 204 ldst t1, tsg, [8, t4, t0], dataSize=8 205 ld t2, tsg, [8, t4, t0], 8, dataSize=8 206 chks t5, t1, TSSCheck 207 wrdh t3, t1, t2 208 wrdl tr, t1, t5 209 wrbase tr, t3, dataSize=8 210 limm t5, (1 << 9) 211 or t1, t1, t5 212 st t1, tsg, [8, t4, t0], dataSize=8 213}; 214 215def macroop LLDT_R 216{ 217 .serializing 218 chks reg, t0, InGDTCheck, flags=(EZF,) 219 br label("end"), flags=(CEZF,) 220 limm t4, 0, dataSize=8 221 srli t4, reg, 3, dataSize=2 222 ldst t1, tsg, [8, t4, t0], dataSize=8 223 ld t2, tsg, [8, t4, t0], 8, dataSize=8 224 chks reg, t1, LDTCheck 225 wrdh t3, t1, t2 226 wrdl tsl, t1, reg 227 wrbase tsl, t3, dataSize=8 228end: 229 fault "NoFault" 230}; 231 232def macroop LLDT_M 233{ 234 .serializing 235 ld t5, seg, sib, disp, dataSize=2 236 chks t5, t0, InGDTCheck, flags=(EZF,) 237 br label("end"), flags=(CEZF,) 238 limm t4, 0, dataSize=8 239 srli t4, t5, 3, dataSize=2 240 ldst t1, tsg, [8, t4, t0], dataSize=8 241 ld t2, tsg, [8, t4, t0], 8, dataSize=8 242 chks t5, t1, LDTCheck 243 wrdh t3, t1, t2 244 wrdl tsl, t1, t5 245 wrbase tsl, t3, dataSize=8 246end: 247 fault "NoFault" 248}; 249 250def macroop LLDT_P 251{ 252 .serializing 253 rdip t7 254 ld t5, seg, riprel, disp, dataSize=2 255 chks t5, t0, InGDTCheck, flags=(EZF,) 256 br label("end"), flags=(CEZF,) 257 limm t4, 0, dataSize=8 258 srli t4, t5, 3, dataSize=2 259 ldst t1, tsg, [8, t4, t0], dataSize=8 260 ld t2, tsg, [8, t4, t0], 8, dataSize=8 261 chks t5, t1, LDTCheck 262 wrdh t3, t1, t2 263 wrdl tsl, t1, t5 264 wrbase tsl, t3, dataSize=8 265end: 266 fault "NoFault" 267}; 268 269def macroop SWAPGS 270{ 271 rdval t1, kernel_gs_base, dataSize=8 272 rdbase t2, gs, dataSize=8 273 wrbase gs, t1, dataSize=8 274 wrval kernel_gs_base, t2, dataSize=8 275}; 276''' 277