153e5879c6
When in 64-bit mode, if the stack is accessed implicitly by an instruction the alternate address prefix should be ignored if present. This patch adds an extra flag to the ldstop which signifies when the address override should be ignored. Then, for all of the affected instructions, this patch adds two options to the ld and st opcode to use the current stack addressing mode for all addresses and to ignore the AddressSizeFlagBit. Finally, this patch updates the x86 TLB to not truncate the address if it is in 64-bit mode and the IgnoreAddrSizeFlagBit is set. This fixes a problem when calling __libc_start_main with a binary that is linked with a recent version of ld. This version of ld uses the address override prefix (0x67) on the call instruction instead of a nop. Note: This has not been tested in compatibility mode and only the call instruction with the address override prefix has been tested. See [1] page 9 (pdf page 45) For instructions that are affected see [1] page 519 (pdf page 555). [1] http://support.amd.com/TechDocs/24594.pdf Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
98 lines
3.3 KiB
Python
98 lines
3.3 KiB
Python
# Copyright (c) 2007 The Hewlett-Packard Development Company
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# All rights reserved.
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#
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# The license below extends only to copyright in the software and shall
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# not be construed as granting a license to any other intellectual
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# property including but not limited to intellectual property relating
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# to a hardware implementation of the functionality of the software
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# licensed hereunder. You may use the software subject to the license
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# terms below provided that you ensure that this notice is replicated
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# unmodified and in its entirety in all distributions of the software,
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# modified or unmodified, in source code or in binary form.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met: redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer;
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# redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution;
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# neither the name of the copyright holders nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# Authors: Gabe Black
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microcode = '''
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def macroop CALL_NEAR_I
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{
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# Make the default data size of calls 64 bits in 64 bit mode
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.adjust_env oszIn64Override
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.function_call
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limm t1, imm
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rdip t7
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# Check target of call
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stis t7, ss, [0, t0, rsp], "-env.dataSize"
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subi rsp, rsp, ssz
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wrip t7, t1
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};
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def macroop CALL_NEAR_R
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{
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# Make the default data size of calls 64 bits in 64 bit mode
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.adjust_env oszIn64Override
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.function_call
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rdip t1
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# Check target of call
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stis t1, ss, [0, t0, rsp], "-env.dataSize"
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subi rsp, rsp, ssz
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wripi reg, 0
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};
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def macroop CALL_NEAR_M
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{
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# Make the default data size of calls 64 bits in 64 bit mode
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.adjust_env oszIn64Override
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.function_call
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rdip t7
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ld t1, seg, sib, disp
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# Check target of call
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st t7, ss, [0, t0, rsp], "-env.dataSize"
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subi rsp, rsp, ssz
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wripi t1, 0
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};
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def macroop CALL_NEAR_P
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{
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# Make the default data size of calls 64 bits in 64 bit mode
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.adjust_env oszIn64Override
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.function_call
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rdip t7
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ld t1, seg, riprel, disp
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# Check target of call
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st t7, ss, [0, t0, rsp], "-env.dataSize"
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subi rsp, rsp, ssz
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wripi t1, 0
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};
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'''
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#let {{
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# class CALL(Inst):
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# "GenFault ${new UnimpInstFault}"
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#}};
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