diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/arch/x86/isa/decoder/two_byte_opcodes.isa | 10 | ||||
| -rw-r--r-- | src/arch/x86/isa/insts/system/__init__.py | 3 | ||||
| -rw-r--r-- | src/arch/x86/isa/insts/system/segmentation.py | 113 | ||||
| -rw-r--r-- | src/arch/x86/isa/microasm.isa | 11 | ||||
| -rw-r--r-- | src/arch/x86/isa/microops/regop.isa | 4 | ||||
| -rw-r--r-- | src/arch/x86/isa/operands.isa | 4 | ||||
| -rw-r--r-- | src/arch/x86/segmentregs.hh | 10 |
7 files changed, 149 insertions, 6 deletions
diff --git a/src/arch/x86/isa/decoder/two_byte_opcodes.isa b/src/arch/x86/isa/decoder/two_byte_opcodes.isa index f3485bc4e..ecd575a5d 100644 --- a/src/arch/x86/isa/decoder/two_byte_opcodes.isa +++ b/src/arch/x86/isa/decoder/two_byte_opcodes.isa @@ -109,7 +109,15 @@ default: decode MODRM_REG { 0x0: sgdt_Ms(); 0x1: sidt_Ms(); - 0x2: lgdt_Ms(); + 0x2: decode MODE_SUBMODE { + 0x0: Inst::LGDT(M); + default: decode OPSIZE { + // 16 bit operand sizes are special, but only + // in legacy and compatability modes. + 0x2: Inst::LGDT_16(M); + default: Inst::LGDT(M); + } + } 0x3: lidt_Ms(); 0x4: smsw_Mw(); 0x6: lmsw_Mw(); diff --git a/src/arch/x86/isa/insts/system/__init__.py b/src/arch/x86/isa/insts/system/__init__.py index 422438b1c..5984761a6 100644 --- a/src/arch/x86/isa/insts/system/__init__.py +++ b/src/arch/x86/isa/insts/system/__init__.py @@ -55,7 +55,8 @@ categories = ["halt", "undefined_operation", - "msrs"] + "msrs", + "segmentation"] microcode = "" for category in categories: diff --git a/src/arch/x86/isa/insts/system/segmentation.py b/src/arch/x86/isa/insts/system/segmentation.py new file mode 100644 index 000000000..6067f64a0 --- /dev/null +++ b/src/arch/x86/isa/insts/system/segmentation.py @@ -0,0 +1,113 @@ +# Copyright (c) 2007 The Hewlett-Packard Development Company +# All rights reserved. +# +# Redistribution and use of this software in source and binary forms, +# with or without modification, are permitted provided that the +# following conditions are met: +# +# The software must be used only for Non-Commercial Use which means any +# use which is NOT directed to receiving any direct monetary +# compensation for, or commercial advantage from such use. Illustrative +# examples of non-commercial use are academic research, personal study, +# teaching, education and corporate research & development. +# Illustrative examples of commercial use are distributing products for +# commercial advantage and providing services using the software for +# commercial advantage. +# +# If you wish to use this software or functionality therein that may be +# covered by patents for commercial use, please contact: +# Director of Intellectual Property Licensing +# Office of Strategy and Technology +# Hewlett-Packard Company +# 1501 Page Mill Road +# Palo Alto, California 94304 +# +# Redistributions of source code must retain the above copyright notice, +# this list of conditions and the following disclaimer. Redistributions +# in binary form must reproduce the above copyright notice, this list of +# conditions and the following disclaimer in the documentation and/or +# other materials provided with the distribution. Neither the name of +# the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its +# contributors may be used to endorse or promote products derived from +# this software without specific prior written permission. No right of +# sublicense is granted herewith. Derivatives of the software and +# output created using the software may be prepared, but only for +# Non-Commercial Uses. Derivatives of the software may be shared with +# others provided: (i) the others agree to abide by the list of +# conditions herein which includes the Non-Commercial Use restrictions; +# and (ii) such Derivatives of the software include the above copyright +# notice to acknowledge the contribution from this software where +# applicable, this list of conditions and the disclaimer below. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +# +# Authors: Gabe Black + +microcode = ''' +def macroop LGDT_M +{ + .adjust_env oszForPseudoDesc + + # Get the limit + ld t1, seg, sib, disp, dataSize=2 + # Get the base + ld t2, seg, sib, 'adjustedDisp + 2' + wrbase gdtr, t2 + wrlimit gdtr, t1 +}; + +def macroop LGDT_P +{ + .adjust_env oszForPseudoDesc + + rdip t7 + # Get the limit + ld t1, seg, riprel, disp, dataSize=2 + # Get the base + ld t2, seg, riprel, 'adjustedDisp + 2' + wrbase gdtr, t2 + wrlimit gdtr, t1 +}; + +# +# These versions are for when the original data size was 16 bits. The base is +# still 32 bits, but the top byte is zeroed before being used. +# + +def macroop LGDT_16_M +{ + .adjust_env oszForPseudoDesc + + # Get the limit + ld t1, seg, sib, disp, dataSize=2 + # Get the base + ld t2, seg, sib, 'adjustedDisp + 2', dataSize=4 + zexti t2, t2, 23 + wrbase gdtr, t2 + wrlimit gdtr, t1 +}; + +def macroop LGDT_16_P +{ + .adjust_env oszForPseudoDesc + + rdip t7 + # Get the limit + ld t1, seg, riprel, disp, dataSize=2 + # Get the base + ld t2, seg, riprel, 'adjustedDisp + 2', dataSize=4 + zexti t2, t2, 23 + wrbase gdtr, t2 + wrlimit gdtr, t1 +}; +''' diff --git a/src/arch/x86/isa/microasm.isa b/src/arch/x86/isa/microasm.isa index 040bb2036..8c499eeed 100644 --- a/src/arch/x86/isa/microasm.isa +++ b/src/arch/x86/isa/microasm.isa @@ -80,6 +80,10 @@ let {{ # Add in symbols for the segment descriptor registers for letter in ("C", "D", "E", "F", "G", "S"): assembler.symbols["%ss" % letter.lower()] = "SEGMENT_REG_%sS" % letter + + for reg in ("LDTR", "TR", "GDTR", "IDTR"): + assembler.symbols[reg.lower()] = "SYS_SEGMENT_REG_%s" % reg + # Miscellaneous symbols symbols = { "reg" : "env.reg", @@ -138,6 +142,13 @@ let {{ env.dataSize = 8; ''' + assembler.symbols["oszForPseudoDesc"] = ''' + if (machInst.mode.submode == SixtyFourBitMode) + env.dataSize = 8; + else + env.dataSize = 4; + ''' + def trimImm(width): return "adjustedImm = adjustedImm & mask(%s);" % width diff --git a/src/arch/x86/isa/microops/regop.isa b/src/arch/x86/isa/microops/regop.isa index 67e6fa1e9..f37b4327b 100644 --- a/src/arch/x86/isa/microops/regop.isa +++ b/src/arch/x86/isa/microops/regop.isa @@ -942,7 +942,7 @@ let {{ super(Wrbase, self).__init__(dest, \ src1, "NUM_INTREGS", flags, dataSize) code = ''' - SegBaseDest = psrc1; + SysSegBaseDest = psrc1; ''' class Wrlimit(RegOp): @@ -950,6 +950,6 @@ let {{ super(Wrlimit, self).__init__(dest, \ src1, "NUM_INTREGS", flags, dataSize) code = ''' - SegLimitDest = psrc1; + SysSegLimitDest = psrc1; ''' }}; diff --git a/src/arch/x86/isa/operands.isa b/src/arch/x86/isa/operands.isa index fff60ce60..40c8ee9c2 100644 --- a/src/arch/x86/isa/operands.isa +++ b/src/arch/x86/isa/operands.isa @@ -127,8 +127,8 @@ def operands {{ 'EferOp': ('ControlReg', 'uqw', 'MISCREG_EFER', (None, None, ['IsSerializeAfter','IsSerializing','IsNonSpeculative']), 73), 'CR4Op': ('ControlReg', 'uqw', 'MISCREG_CR4', (None, None, ['IsSerializeAfter','IsSerializing','IsNonSpeculative']), 74), 'CSBase': ('ControlReg', 'udw', 'MISCREG_CS_EFF_BASE', (None, None, ['IsSerializeAfter','IsSerializing','IsNonSpeculative']), 80), - 'SegBaseDest': ('ControlReg', 'uqw', 'MISCREG_SEG_BASE(dest)', (None, None, ['IsSerializeAfter','IsSerializing','IsNonSpeculative']), 75), - 'SegLimitDest': ('ControlReg', 'uqw', 'MISCREG_SEG_LIMIT(dest)', (None, None, ['IsSerializeAfter','IsSerializing','IsNonSpeculative']), 76), + 'SysSegBaseDest': ('ControlReg', 'uqw', 'MISCREG_SYSSEG_BASE(dest)', (None, None, ['IsSerializeAfter','IsSerializing','IsNonSpeculative']), 75), + 'SysSegLimitDest': ('ControlReg', 'uqw', 'MISCREG_SYSSEG_LIMIT(dest)', (None, None, ['IsSerializeAfter','IsSerializing','IsNonSpeculative']), 76), 'Mem': ('Mem', 'uqw', None, ('IsMemRef', 'IsLoad', 'IsStore'), 100) }}; diff --git a/src/arch/x86/segmentregs.hh b/src/arch/x86/segmentregs.hh index 524b756d6..e6079da6d 100644 --- a/src/arch/x86/segmentregs.hh +++ b/src/arch/x86/segmentregs.hh @@ -72,6 +72,16 @@ namespace X86ISA NUM_SEGMENTREGS }; + + enum SysSegmentRegIndex + { + SYS_SEGMENT_REG_LDTR, + SYS_SEGMENT_REG_TR, + SYS_SEGMENT_REG_GDTR, + SYS_SEGMENT_REG_IDTR, + + NUM_SYSSEGMENTREGS + }; }; #endif // __ARCH_X86_SEGMENTREGS_HH__ |