1# Copyright (c) 2007-2008 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 9# use which is NOT directed to receiving any direct monetary 10# compensation for, or commercial advantage from such use. Illustrative 11# examples of non-commercial use are academic research, personal study, 12# teaching, education and corporate research & development. 13# Illustrative examples of commercial use are distributing products for 14# commercial advantage and providing services using the software for 15# commercial advantage. 16# 17# If you wish to use this software or functionality therein that may be 18# covered by patents for commercial use, please contact: 19# Director of Intellectual Property Licensing 20# Office of Strategy and Technology 21# Hewlett-Packard Company 22# 1501 Page Mill Road 23# Palo Alto, California 94304 24# 25# Redistributions of source code must retain the above copyright notice, 26# this list of conditions and the following disclaimer. Redistributions 27# in binary form must reproduce the above copyright notice, this list of 28# conditions and the following disclaimer in the documentation and/or 29# other materials provided with the distribution. Neither the name of 30# the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its 31# contributors may be used to endorse or promote products derived from 32# this software without specific prior written permission. No right of 33# sublicense is granted herewith. Derivatives of the software and 34# output created using the software may be prepared, but only for 35# Non-Commercial Uses. Derivatives of the software may be shared with 36# others provided: (i) the others agree to abide by the list of 37# conditions herein which includes the Non-Commercial Use restrictions; 38# and (ii) such Derivatives of the software include the above copyright 39# notice to acknowledge the contribution from this software where 40# applicable, this list of conditions and the disclaimer below. 41# 42# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 43# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 44# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 45# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 46# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 47# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 48# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 49# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 50# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 51# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 52# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 53# 54# Authors: Gabe Black 55 56microcode = ''' 57def macroop RET_NEAR 58{ 59 # Make the default data size of rets 64 bits in 64 bit mode 60 .adjust_env oszIn64Override 61 62 ld t1, ss, [1, t0, rsp] 63 # Check address of return 64 addi rsp, rsp, dsz 65 wripi t1, 0 66}; 67 68def macroop RET_NEAR_I 69{ 70 # Make the default data size of rets 64 bits in 64 bit mode 71 .adjust_env oszIn64Override 72 73 limm t2, imm 74 ld t1, ss, [1, t0, rsp] 75 # Check address of return 76 addi rsp, rsp, dsz 77 add rsp, rsp, t2 78 wripi t1, 0 79}; 80 81def macroop RET_FAR { 82 .adjust_env oszIn64Override 83 84 # Get the return RIP 85 ld t1, ss, [1, t0, rsp] 86 87 # Get the return CS 88 ld t2, ss, [1, t0, rsp], ssz 89 90 # Get the rpl 91 andi t3, t2, 0x3 92 93 # Get the cpl 94 95 # Here we'd check if we're changing priviledge levels. We'll just hope 96 # that doesn't happen yet. 97 98 # Do stuff if they're equal 99 andi t0, t2, 0xFC, flags=(EZF,), dataSize=2 100 bri t0, label("processDescriptor"), flags=(CEZF,) 101 andi t3, t2, 0xF8, dataSize=8 102 andi t0, t2, 0x4, flags=(EZF,), dataSize=2 103 bri t0, label("globalDescriptor"), flags=(CEZF,) 104 ld t3, tsl, [1, t0, t3], dataSize=8 105 bri t0, label("processDescriptor") 106globalDescriptor: 107 ld t3, tsg, [1, t0, t3], dataSize=8 108processDescriptor: 109 chks t2, t3, IretCheck, dataSize=8 110 # There should be validity checks on the RIP checks here, but I'll do 111 # that later.
| 1# Copyright (c) 2007-2008 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 9# use which is NOT directed to receiving any direct monetary 10# compensation for, or commercial advantage from such use. Illustrative 11# examples of non-commercial use are academic research, personal study, 12# teaching, education and corporate research & development. 13# Illustrative examples of commercial use are distributing products for 14# commercial advantage and providing services using the software for 15# commercial advantage. 16# 17# If you wish to use this software or functionality therein that may be 18# covered by patents for commercial use, please contact: 19# Director of Intellectual Property Licensing 20# Office of Strategy and Technology 21# Hewlett-Packard Company 22# 1501 Page Mill Road 23# Palo Alto, California 94304 24# 25# Redistributions of source code must retain the above copyright notice, 26# this list of conditions and the following disclaimer. Redistributions 27# in binary form must reproduce the above copyright notice, this list of 28# conditions and the following disclaimer in the documentation and/or 29# other materials provided with the distribution. Neither the name of 30# the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its 31# contributors may be used to endorse or promote products derived from 32# this software without specific prior written permission. No right of 33# sublicense is granted herewith. Derivatives of the software and 34# output created using the software may be prepared, but only for 35# Non-Commercial Uses. Derivatives of the software may be shared with 36# others provided: (i) the others agree to abide by the list of 37# conditions herein which includes the Non-Commercial Use restrictions; 38# and (ii) such Derivatives of the software include the above copyright 39# notice to acknowledge the contribution from this software where 40# applicable, this list of conditions and the disclaimer below. 41# 42# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 43# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 44# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 45# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 46# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 47# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 48# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 49# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 50# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 51# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 52# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 53# 54# Authors: Gabe Black 55 56microcode = ''' 57def macroop RET_NEAR 58{ 59 # Make the default data size of rets 64 bits in 64 bit mode 60 .adjust_env oszIn64Override 61 62 ld t1, ss, [1, t0, rsp] 63 # Check address of return 64 addi rsp, rsp, dsz 65 wripi t1, 0 66}; 67 68def macroop RET_NEAR_I 69{ 70 # Make the default data size of rets 64 bits in 64 bit mode 71 .adjust_env oszIn64Override 72 73 limm t2, imm 74 ld t1, ss, [1, t0, rsp] 75 # Check address of return 76 addi rsp, rsp, dsz 77 add rsp, rsp, t2 78 wripi t1, 0 79}; 80 81def macroop RET_FAR { 82 .adjust_env oszIn64Override 83 84 # Get the return RIP 85 ld t1, ss, [1, t0, rsp] 86 87 # Get the return CS 88 ld t2, ss, [1, t0, rsp], ssz 89 90 # Get the rpl 91 andi t3, t2, 0x3 92 93 # Get the cpl 94 95 # Here we'd check if we're changing priviledge levels. We'll just hope 96 # that doesn't happen yet. 97 98 # Do stuff if they're equal 99 andi t0, t2, 0xFC, flags=(EZF,), dataSize=2 100 bri t0, label("processDescriptor"), flags=(CEZF,) 101 andi t3, t2, 0xF8, dataSize=8 102 andi t0, t2, 0x4, flags=(EZF,), dataSize=2 103 bri t0, label("globalDescriptor"), flags=(CEZF,) 104 ld t3, tsl, [1, t0, t3], dataSize=8 105 bri t0, label("processDescriptor") 106globalDescriptor: 107 ld t3, tsg, [1, t0, t3], dataSize=8 108processDescriptor: 109 chks t2, t3, IretCheck, dataSize=8 110 # There should be validity checks on the RIP checks here, but I'll do 111 # that later.
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