jump.py (5081:2ccce8600a9d) | jump.py (6060:3d524dc980a8) |
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1# Copyright (c) 2007 The Hewlett-Packard Development Company 2# All rights reserved. 3# 4# Redistribution and use of this software in source and binary forms, 5# with or without modification, are permitted provided that the 6# following conditions are met: 7# 8# The software must be used only for Non-Commercial Use which means any --- 76 unchanged lines hidden (view full) --- 85{ 86 # Make the default data size of jumps 64 bits in 64 bit mode 87 .adjust_env oszIn64Override 88 89 rdip t7 90 ld t1, seg, riprel, disp 91 wripi t1, 0 92}; | 1# Copyright (c) 2007 The Hewlett-Packard Development Company 2# All rights reserved. 3# 4# Redistribution and use of this software in source and binary forms, 5# with or without modification, are permitted provided that the 6# following conditions are met: 7# 8# The software must be used only for Non-Commercial Use which means any --- 76 unchanged lines hidden (view full) --- 85{ 86 # Make the default data size of jumps 64 bits in 64 bit mode 87 .adjust_env oszIn64Override 88 89 rdip t7 90 ld t1, seg, riprel, disp 91 wripi t1, 0 92}; |
93 94def macroop JMP_FAR_M 95{ 96 limm t1, 0, dataSize=8 97 limm t2, 0, dataSize=8 98 lea t1, seg, sib, disp, dataSize=asz 99 ld t2, seg, [1, t0, t1], dsz 100 ld t1, seg, [1, t0, t1] 101 br rom_label("jmpFarWork") 102}; 103 104def macroop JMP_FAR_P 105{ 106 limm t1, 0, dataSize=8 107 limm t2, 0, dataSize=8 108 rdip t7, dataSize=asz 109 lea t1, seg, riprel, disp, dataSize=asz 110 ld t2, seg, [1, t0, t1], dsz 111 ld t1, seg, [1, t0, t1] 112 br rom_label("jmpFarWork") 113}; 114 115def macroop JMP_FAR_I 116{ 117 # Put the whole far pointer into a register. 118 limm t2, imm, dataSize=8 119 # Figure out the width of the offset. 120 limm t3, dsz, dataSize=8 121 sll t3, t3, 3, dataSize=8 122 # Get the selector into t1. 123 sll t1, t2, t3, dataSize=8 124 mov t1, t0, t1, dataSize=2 125 # And get the offset into t2 126 mov t2, t0, t2 127 br rom_label("jmpFarWork") 128}; 129 130def rom 131{ 132 extern jmpFarWork: 133 # t1 has the offset and t2 has the new selector. 134 # This is intended to run in protected mode. 135 andi t0, t2, 0xFC, flags=(EZF,), dataSize=2 136 fault "new GeneralProtection(0)", flags=(CEZF,) 137 andi t3, t2, 0xF8, dataSize=8 138 andi t0, t2, 0x4, flags=(EZF,), dataSize=2 139 br rom_local_label("farJmpGlobalDescriptor"), flags=(CEZF,) 140 ld t4, tsl, [1, t0, t3], dataSize=8, addressSize=8, atCPL0=True 141 br rom_local_label("farJmpProcessDescriptor") 142farJmpGlobalDescriptor: 143 ld t4, tsg, [1, t0, t3], dataSize=8, addressSize=8, atCPL0=True 144farJmpProcessDescriptor: 145 rcri t0, t4, 13, flags=(ECF,), dataSize=2 146 br rom_local_label("farJmpSystemDescriptor"), flags=(nCECF,) 147 chks t2, t4, CSCheck, dataSize=8 148 wrdl cs, t4, t2 149 wrsel cs, t2 150 wrip t0, t1 151 eret 152 153farJmpSystemDescriptor: 154 panic "Far jumps to system descriptors aren't implemented" 155 eret 156}; 157 158def macroop JMP_FAR_REAL_M 159{ 160 lea t1, seg, sib, disp, dataSize=asz 161 ld t2, seg, [1, t0, t1], dsz 162 ld t1, seg, [1, t0, t1] 163 zexti t3, t1, 15, dataSize=8 164 slli t3, t3, 4, dataSize=8 165 wrsel cs, t1, dataSize=2 166 wrbase cs, t3 167 wrip t0, t2, dataSize=asz 168}; 169 170def macroop JMP_FAR_REAL_P 171{ 172 panic "Real mode far jump executed in 64 bit mode!" 173}; 174 175def macroop JMP_FAR_REAL_I 176{ 177 # Put the whole far pointer into a register. 178 limm t2, imm, dataSize=8 179 # Figure out the width of the offset. 180 limm t3, dsz, dataSize=8 181 sll t3, t3, 3, dataSize=8 182 # Get the selector into t1. 183 sll t1, t2, t3, dataSize=8 184 mov t1, t0, t1, dataSize=2 185 # And get the offset into t2 186 mov t2, t0, t2 187 slli t3, t3, 4, dataSize=8 188 wrsel cs, t1, dataSize=2 189 wrbase cs, t3 190 wrip t0, t2, dataSize=asz 191}; |
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93''' | 192''' |