mirror of
https://github.com/pound-emu/ballistic.git
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163 lines
7.2 KiB
XML
163 lines
7.2 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<?xml-stylesheet type="text/xsl" encoding="UTF-8" href="iform.xsl" version="1.0"?>
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<!DOCTYPE instructionsection PUBLIC "-//ARM//DTD instructionsection //EN" "iform-p.dtd">
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<!-- Copyright (c) 2010-2022 Arm Limited or its affiliates. All rights reserved. -->
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<!-- This document is Non-Confidential. This document may only be used and distributed in accordance with the terms of the agreement entered into by Arm and the party that Arm delivered this document to. -->
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<instructionsection id="AUTDB" title="AUTDB, AUTDZB -- A64" type="instruction">
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<docvars>
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<docvar key="instr-class" value="general" />
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<docvar key="isa" value="A64" />
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</docvars>
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<heading>AUTDB, AUTDZB</heading>
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<desc>
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<brief>
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<para>Authenticate Data address, using key B</para>
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</brief>
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<authored>
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<para>Authenticate Data address, using key B. This instruction authenticates a data address, using a modifier and key B.</para>
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<para>The address is in the general-purpose register that is specified by <syntax><Xd></syntax>.</para>
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<para>The modifier is:</para>
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<list type="unordered">
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<listitem><content>In the general-purpose register or stack pointer that is specified by <syntax><Xn|SP></syntax> for <instruction>AUTDB</instruction>.</content></listitem>
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<listitem><content>The value zero, for <instruction>AUTDZB</instruction>.</content></listitem>
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</list>
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<para>If the authentication passes, the upper bits of the address are restored to enable subsequent use of the address. For information on behavior if the authentication fails, see <xref>Faulting on pointer authentication</xref>.</para>
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</authored>
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</desc>
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<alias_list howmany="0"></alias_list>
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<classes>
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<iclass name="Integer" oneof="1" id="iclass_general" no_encodings="2" isa="A64">
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<docvars>
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<docvar key="instr-class" value="general" />
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<docvar key="isa" value="A64" />
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</docvars>
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<iclassintro count="2"></iclassintro>
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<arch_variants>
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<arch_variant name="ARMv8.3" feature="FEAT_PAuth" />
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</arch_variants>
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<regdiagram form="32" psname="aarch64/instrs/integer/pac/autdb/dp_1src">
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<box hibit="31" name="sf" settings="1">
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<c>1</c>
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</box>
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<box hibit="30" settings="1">
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<c>1</c>
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</box>
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<box hibit="29" name="S" settings="1">
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<c>0</c>
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</box>
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<box hibit="28" width="8" settings="8">
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<c>1</c>
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<c>1</c>
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<c>0</c>
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<c>1</c>
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<c>0</c>
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<c>1</c>
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<c>1</c>
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<c>0</c>
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</box>
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<box hibit="20" width="5" name="opcode2" settings="5">
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<c>0</c>
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<c>0</c>
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<c>0</c>
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<c>0</c>
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<c>1</c>
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</box>
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<box hibit="15" name="opcode[5]" settings="1">
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<c>0</c>
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</box>
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<box hibit="14" name="opcode[4]" settings="1">
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<c>0</c>
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</box>
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<box hibit="13" name="Z" usename="1">
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<c></c>
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</box>
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<box hibit="12" width="3" name="opcode[2:0]" settings="3">
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<c>1</c>
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<c>1</c>
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<c>1</c>
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</box>
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<box hibit="9" width="5" name="Rn" usename="1">
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<c colspan="5"></c>
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</box>
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<box hibit="4" width="5" name="Rd" usename="1">
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<c colspan="5"></c>
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</box>
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</regdiagram>
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<encoding name="AUTDB_64P_dp_1src" oneofinclass="2" oneof="2" label="AUTDB" bitdiffs="Z == 0">
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<docvars>
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<docvar key="instr-class" value="general" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="AUTDB" />
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</docvars>
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<box hibit="13" width="1" name="Z">
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<c>0</c>
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</box>
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<asmtemplate><text>AUTDB </text><a link="sa_xd" hover="64-bit general-purpose destination register (field "Rd")"><Xd></a><text>, </text><a link="sa_xn_sp" hover="64-bit general-purpose source register or SP (field "Rn")"><Xn|SP></a></asmtemplate>
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</encoding>
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<encoding name="AUTDZB_64Z_dp_1src" oneofinclass="2" oneof="2" label="AUTDZB" bitdiffs="Z == 1 && Rn == 11111">
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<docvars>
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<docvar key="instr-class" value="general" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="AUTDZB" />
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</docvars>
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<box hibit="13" width="1" name="Z">
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<c>1</c>
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</box>
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<box hibit="9" width="5" name="Rn">
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<c>1</c>
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<c>1</c>
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<c>1</c>
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<c>1</c>
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<c>1</c>
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</box>
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<asmtemplate><text>AUTDZB </text><a link="sa_xd" hover="64-bit general-purpose destination register (field "Rd")"><Xd></a></asmtemplate>
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</encoding>
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<ps_section howmany="1">
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<ps name="aarch64/instrs/integer/pac/autdb/dp_1src" mylink="aarch64.instrs.integer.pac.autdb.dp_1src" enclabels="" sections="1" secttype="noheading">
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<pstext mayhavelinks="1" section="Decode" rep_section="decode">boolean source_is_sp = FALSE;
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integer d = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Rd);
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integer n = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Rn);
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if !<a link="impl-aarch64.HavePACExt.0" file="shared_pseudocode.xml" hover="function: boolean HavePACExt()">HavePACExt</a>() then
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UNDEFINED;
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if Z == '0' then // AUTDB
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if n == 31 then source_is_sp = TRUE;
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else // AUTDZB
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if n != 31 then UNDEFINED;</pstext>
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</ps>
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</ps_section>
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</iclass>
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</classes>
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<explanations scope="all">
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<explanation enclist="AUTDB_64P_dp_1src, AUTDZB_64Z_dp_1src" symboldefcount="1">
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<symbol link="sa_xd"><Xd></symbol>
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<account encodedin="Rd">
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<intro>
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<para>Is the 64-bit name of the general-purpose destination register, encoded in the "Rd" field.</para>
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</intro>
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</account>
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</explanation>
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<explanation enclist="AUTDB_64P_dp_1src" symboldefcount="1">
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<symbol link="sa_xn_sp"><Xn|SP></symbol>
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<account encodedin="Rn">
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<intro>
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<para>Is the 64-bit name of the general-purpose source register or stack pointer, encoded in the "Rn" field.</para>
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</intro>
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</account>
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</explanation>
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</explanations>
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<ps_section howmany="1">
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<ps name="aarch64/instrs/integer/pac/autdb/dp_1src" mylink="execute" enclabels="" sections="1" secttype="Operation">
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<pstext mayhavelinks="1" section="Execute" rep_section="execute">auth_then_branch = FALSE;
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if <a link="impl-aarch64.HavePACExt.0" file="shared_pseudocode.xml" hover="function: boolean HavePACExt()">HavePACExt</a>() then
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if source_is_sp then
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<a link="impl-aarch64.X.write.2" file="shared_pseudocode.xml" hover="accessor: X[integer n, integer width] = bits(width) value">X</a>[d, 64] = AuthDB(X[d, 64], SP[], auth_then_branch);
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else
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<a link="impl-aarch64.X.write.2" file="shared_pseudocode.xml" hover="accessor: X[integer n, integer width] = bits(width) value">X</a>[d, 64] = AuthDB(X[d, 64], X[n, 64], auth_then_branch);</pstext>
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</ps>
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</ps_section>
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</instructionsection>
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