forked from OSchip/llvm-project
Support nested target.xml register definition files, lack of reg group markers.
The qemu x86_64 target returns a target.xml register definition file which includes other xml files and they include others, etc. Also, the registers are not put in register groups like lldb wants to see. This patch (1) puts registers that aren't in a register group in a "general" register group, (2) change ProcessGDBRemote::GetGDBServerRegisterInfo to be a method that starts the parsing, asking a recurisve function to fetch and parse target.xml, (3) adds ProcessGDBRemote::GetGDBServerRegisterInfoXMLAndProcess which can recusively call itself to read and parse included xml files, (4) in addition to expecting the top-level <target> element (which only happens in the top level xml file), also an xml file that consists of a <feature> node - read the register defintions and includes from that <feature> element. <rdar://problem/49537922> Differential revision: https://reviews.llvm.org/D63802 llvm-svn: 364484
This commit is contained in:
Jason Molenda
parent
e311a4d5c4
commit
1659276bee
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@ -0,0 +1,238 @@
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from __future__ import print_function
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import lldb
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test.decorators import *
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from gdbclientutils import *
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class TestNestedRegDefinitions(GDBRemoteTestBase):
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@skipIfXmlSupportMissing
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@skipIfRemote
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def test(self):
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"""
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Test lldb's parsing of the <architecture> tag in the target.xml register
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description packet.
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"""
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class MyResponder(MockGDBServerResponder):
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def qXferRead(self, obj, annex, offset, length):
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if annex == "target.xml":
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return """<?xml version="1.0"?><!DOCTYPE target SYSTEM "gdb-target.dtd"><target><architecture>i386:x86-64</architecture><xi:include href="i386-64bit.xml"/></target>""", False
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if annex == "i386-64bit.xml":
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return """<?xml version="1.0"?>
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<!-- Copyright (C) 2010-2017 Free Software Foundation, Inc.
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Copying and distribution of this file, with or without modification,
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are permitted in any medium without royalty provided the copyright
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notice and this notice are preserved. -->
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<!-- I386 64bit -->
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<!DOCTYPE target SYSTEM "gdb-target.dtd">
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<feature name="org.gnu.gdb.i386.64bit">
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<xi:include href="i386-64bit-core.xml"/>
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<xi:include href="i386-64bit-sse.xml"/>
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</feature>""", False
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if annex == "i386-64bit-core.xml":
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return """<?xml version="1.0"?>
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<!-- Copyright (C) 2010-2015 Free Software Foundation, Inc.
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Copying and distribution of this file, with or without modification,
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are permitted in any medium without royalty provided the copyright
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notice and this notice are preserved. -->
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<!DOCTYPE feature SYSTEM "gdb-target.dtd">
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<feature name="org.gnu.gdb.i386.core">
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<flags id="i386_eflags" size="4">
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<field name="CF" start="0" end="0"/>
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<field name="" start="1" end="1"/>
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<field name="PF" start="2" end="2"/>
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<field name="AF" start="4" end="4"/>
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<field name="ZF" start="6" end="6"/>
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<field name="SF" start="7" end="7"/>
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<field name="TF" start="8" end="8"/>
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<field name="IF" start="9" end="9"/>
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<field name="DF" start="10" end="10"/>
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<field name="OF" start="11" end="11"/>
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<field name="NT" start="14" end="14"/>
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<field name="RF" start="16" end="16"/>
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<field name="VM" start="17" end="17"/>
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<field name="AC" start="18" end="18"/>
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<field name="VIF" start="19" end="19"/>
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<field name="VIP" start="20" end="20"/>
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<field name="ID" start="21" end="21"/>
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</flags>
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<reg name="rax" bitsize="64" type="int64"/>
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<reg name="rbx" bitsize="64" type="int64"/>
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<reg name="rcx" bitsize="64" type="int64"/>
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<reg name="rdx" bitsize="64" type="int64"/>
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<reg name="rsi" bitsize="64" type="int64"/>
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<reg name="rdi" bitsize="64" type="int64"/>
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<reg name="rbp" bitsize="64" type="data_ptr"/>
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<reg name="rsp" bitsize="64" type="data_ptr"/>
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<reg name="r8" bitsize="64" type="int64"/>
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<reg name="r9" bitsize="64" type="int64"/>
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<reg name="r10" bitsize="64" type="int64"/>
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<reg name="r11" bitsize="64" type="int64"/>
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<reg name="r12" bitsize="64" type="int64"/>
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<reg name="r13" bitsize="64" type="int64"/>
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<reg name="r14" bitsize="64" type="int64"/>
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<reg name="r15" bitsize="64" type="int64"/>
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<reg name="rip" bitsize="64" type="code_ptr"/>
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<reg name="eflags" bitsize="32" type="i386_eflags"/>
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<reg name="cs" bitsize="32" type="int32"/>
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<reg name="ss" bitsize="32" type="int32"/>
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<reg name="ds" bitsize="32" type="int32"/>
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<reg name="es" bitsize="32" type="int32"/>
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<reg name="fs" bitsize="32" type="int32"/>
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<reg name="gs" bitsize="32" type="int32"/>
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<reg name="st0" bitsize="80" type="i387_ext"/>
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<reg name="st1" bitsize="80" type="i387_ext"/>
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<reg name="st2" bitsize="80" type="i387_ext"/>
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<reg name="st3" bitsize="80" type="i387_ext"/>
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<reg name="st4" bitsize="80" type="i387_ext"/>
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<reg name="st5" bitsize="80" type="i387_ext"/>
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<reg name="st6" bitsize="80" type="i387_ext"/>
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<reg name="st7" bitsize="80" type="i387_ext"/>
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<reg name="fctrl" bitsize="32" type="int" group="float"/>
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<reg name="fstat" bitsize="32" type="int" group="float"/>
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<reg name="ftag" bitsize="32" type="int" group="float"/>
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<reg name="fiseg" bitsize="32" type="int" group="float"/>
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<reg name="fioff" bitsize="32" type="int" group="float"/>
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<reg name="foseg" bitsize="32" type="int" group="float"/>
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<reg name="fooff" bitsize="32" type="int" group="float"/>
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<reg name="fop" bitsize="32" type="int" group="float"/>
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</feature>""", False
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if annex == "i386-64bit-sse.xml":
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return """<?xml version="1.0"?>
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<!-- Copyright (C) 2010-2017 Free Software Foundation, Inc.
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Copying and distribution of this file, with or without modification,
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are permitted in any medium without royalty provided the copyright
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notice and this notice are preserved. -->
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<!DOCTYPE feature SYSTEM "gdb-target.dtd">
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<feature name="org.gnu.gdb.i386.64bit.sse">
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<vector id="v4f" type="ieee_single" count="4"/>
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<vector id="v2d" type="ieee_double" count="2"/>
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<vector id="v16i8" type="int8" count="16"/>
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<vector id="v8i16" type="int16" count="8"/>
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<vector id="v4i32" type="int32" count="4"/>
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<vector id="v2i64" type="int64" count="2"/>
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<union id="vec128">
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<field name="v4_float" type="v4f"/>
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<field name="v2_double" type="v2d"/>
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<field name="v16_int8" type="v16i8"/>
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<field name="v8_int16" type="v8i16"/>
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<field name="v4_int32" type="v4i32"/>
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<field name="v2_int64" type="v2i64"/>
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<field name="uint128" type="uint128"/>
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</union>
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<flags id="i386_mxcsr" size="4">
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<field name="IE" start="0" end="0"/>
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<field name="DE" start="1" end="1"/>
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<field name="ZE" start="2" end="2"/>
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<field name="OE" start="3" end="3"/>
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<field name="UE" start="4" end="4"/>
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<field name="PE" start="5" end="5"/>
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<field name="DAZ" start="6" end="6"/>
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<field name="IM" start="7" end="7"/>
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<field name="DM" start="8" end="8"/>
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<field name="ZM" start="9" end="9"/>
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<field name="OM" start="10" end="10"/>
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<field name="UM" start="11" end="11"/>
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<field name="PM" start="12" end="12"/>
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<field name="FZ" start="15" end="15"/>
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</flags>
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<reg name="xmm0" bitsize="128" type="vec128" regnum="40"/>
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<reg name="xmm1" bitsize="128" type="vec128"/>
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<reg name="xmm2" bitsize="128" type="vec128"/>
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<reg name="xmm3" bitsize="128" type="vec128"/>
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<reg name="xmm4" bitsize="128" type="vec128"/>
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<reg name="xmm5" bitsize="128" type="vec128"/>
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<reg name="xmm6" bitsize="128" type="vec128"/>
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<reg name="xmm7" bitsize="128" type="vec128"/>
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<reg name="xmm8" bitsize="128" type="vec128"/>
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<reg name="xmm9" bitsize="128" type="vec128"/>
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<reg name="xmm10" bitsize="128" type="vec128"/>
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<reg name="xmm11" bitsize="128" type="vec128"/>
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<reg name="xmm12" bitsize="128" type="vec128"/>
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<reg name="xmm13" bitsize="128" type="vec128"/>
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<reg name="xmm14" bitsize="128" type="vec128"/>
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<reg name="xmm15" bitsize="128" type="vec128"/>
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<reg name="mxcsr" bitsize="32" type="i386_mxcsr" group="vector"/>
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</feature>""", False
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return None, False
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def readRegister(self, regnum):
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return ""
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def readRegisters(self):
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return "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"
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def haltReason(self):
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return "T02thread:dead;threads:dead;"
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def qfThreadInfo(self):
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return "mdead"
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def qC(self):
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return ""
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def qSupported(self, client_supported):
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return "PacketSize=4000;qXfer:features:read+"
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def QThreadSuffixSupported(self):
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return "OK"
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def QListThreadsInStopReply(self):
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return "OK"
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self.server.responder = MyResponder()
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if self.TraceOn():
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self.runCmd("log enable gdb-remote packets")
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self.addTearDownHook(
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lambda: self.runCmd("log disable gdb-remote packets"))
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target = self.dbg.CreateTargetWithFileAndArch(None, None)
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process = self.connect(target)
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if self.TraceOn():
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interp = self.dbg.GetCommandInterpreter()
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result = lldb.SBCommandReturnObject()
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interp.HandleCommand("target list", result)
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print(result.GetOutput())
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rip_valobj = process.GetThreadAtIndex(0).GetFrameAtIndex(0).FindRegister("rip")
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self.assertEqual(rip_valobj.GetValueAsUnsigned(), 0x00ffff800041120e)
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r15_valobj = process.GetThreadAtIndex(0).GetFrameAtIndex(0).FindRegister("r15")
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self.assertEqual(r15_valobj.GetValueAsUnsigned(), 0xffffff8000c0b778)
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mxcsr_valobj = process.GetThreadAtIndex(0).GetFrameAtIndex(0).FindRegister("mxcsr")
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self.assertEqual(mxcsr_valobj.GetValueAsUnsigned(), 0x00001f80)
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gpr_reg_set_name = process.GetThreadAtIndex(0).GetFrameAtIndex(0).GetRegisters().GetValueAtIndex(0).GetName()
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self.assertEqual(gpr_reg_set_name, "general")
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float_reg_set_name = process.GetThreadAtIndex(0).GetFrameAtIndex(0).GetRegisters().GetValueAtIndex(1).GetName()
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self.assertEqual(float_reg_set_name, "float")
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vector_reg_set_name = process.GetThreadAtIndex(0).GetFrameAtIndex(0).GetRegisters().GetValueAtIndex(2).GetName()
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self.assertEqual(vector_reg_set_name, "vector")
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if self.TraceOn():
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print("rip is 0x%x" % rip_valobj.GetValueAsUnsigned())
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print("r15 is 0x%x" % r15_valobj.GetValueAsUnsigned())
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print("mxcsr is 0x%x" % mxcsr_valobj.GetValueAsUnsigned())
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@ -4490,8 +4490,15 @@ bool ParseRegisters(XMLNode feature_node, GdbServerTargetInfo &target_info,
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// Only update the register set name if we didn't get a "reg_set"
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// attribute. "set_name" will be empty if we didn't have a "reg_set"
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// attribute.
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if (!set_name && !gdb_group.empty())
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set_name.SetCString(gdb_group.c_str());
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if (!set_name) {
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if (!gdb_group.empty()) {
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set_name.SetCString(gdb_group.c_str());
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} else {
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// If no register group name provided anywhere,
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// we'll create a 'general' register set
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set_name.SetCString("general");
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}
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}
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reg_info.byte_offset = reg_offset;
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assert(reg_info.byte_size != 0);
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@ -4516,38 +4523,33 @@ bool ParseRegisters(XMLNode feature_node, GdbServerTargetInfo &target_info,
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} // namespace
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// query the target of gdb-remote for extended target information return:
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// 'true' on success
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// 'false' on failure
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bool ProcessGDBRemote::GetGDBServerRegisterInfo(ArchSpec &arch_to_use) {
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// Make sure LLDB has an XML parser it can use first
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if (!XMLDocument::XMLEnabled())
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return false;
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// redirect libxml2's error handler since the default prints to stdout
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GDBRemoteCommunicationClient &comm = m_gdb_comm;
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// check that we have extended feature read support
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if (!comm.GetQXferFeaturesReadSupported())
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return false;
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// This method fetches a register description feature xml file from
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// the remote stub and adds registers/register groupsets/architecture
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// information to the current process. It will call itself recursively
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// for nested register definition files. It returns true if it was able
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// to fetch and parse an xml file.
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bool ProcessGDBRemote::GetGDBServerRegisterInfoXMLAndProcess(ArchSpec &arch_to_use,
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std::string xml_filename,
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uint32_t &cur_reg_num,
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uint32_t ®_offset) {
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// request the target xml file
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std::string raw;
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lldb_private::Status lldberr;
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if (!comm.ReadExtFeature(ConstString("features"), ConstString("target.xml"),
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if (!m_gdb_comm.ReadExtFeature(ConstString("features"),
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ConstString(xml_filename.c_str()),
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raw, lldberr)) {
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return false;
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}
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XMLDocument xml_document;
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if (xml_document.ParseMemory(raw.c_str(), raw.size(), "target.xml")) {
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if (xml_document.ParseMemory(raw.c_str(), raw.size(), xml_filename.c_str())) {
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GdbServerTargetInfo target_info;
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std::vector<XMLNode> feature_nodes;
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// The top level feature XML file will start with a <target> tag.
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XMLNode target_node = xml_document.GetRootElement("target");
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if (target_node) {
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std::vector<XMLNode> feature_nodes;
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target_node.ForEachChildElement([&target_info, &feature_nodes](
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const XMLNode &node) -> bool {
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llvm::StringRef name = node.GetName();
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@ -4585,32 +4587,48 @@ bool ProcessGDBRemote::GetGDBServerRegisterInfo(ArchSpec &arch_to_use) {
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}
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return true; // Keep iterating through all children of the target_node
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});
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} else {
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// In an included XML feature file, we're already "inside" the <target>
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// tag of the initial XML file; this included file will likely only have
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// a <feature> tag. Need to check for any more included files in this
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// <feature> element.
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XMLNode feature_node = xml_document.GetRootElement("feature");
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if (feature_node) {
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feature_nodes.push_back(feature_node);
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feature_node.ForEachChildElement([&target_info](
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const XMLNode &node) -> bool {
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llvm::StringRef name = node.GetName();
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if (name == "xi:include" || name == "include") {
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llvm::StringRef href = node.GetAttributeValue("href");
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if (!href.empty())
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target_info.includes.push_back(href.str());
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}
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return true;
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});
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}
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}
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// If the target.xml includes an architecture entry like
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// <architecture>i386:x86-64</architecture> (seen from VMWare ESXi)
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// <architecture>arm</architecture> (seen from Segger JLink on unspecified arm board)
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// use that if we don't have anything better.
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if (!arch_to_use.IsValid() && !target_info.arch.empty()) {
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if (target_info.arch == "i386:x86-64") {
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// We don't have any information about vendor or OS.
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arch_to_use.SetTriple("x86_64--");
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GetTarget().MergeArchitecture(arch_to_use);
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}
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// SEGGER J-Link jtag boards send this very-generic arch name,
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// we'll need to use this if we have absolutely nothing better
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// to work with or the register definitions won't be accepted.
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if (target_info.arch == "arm") {
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arch_to_use.SetTriple("arm--");
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GetTarget().MergeArchitecture(arch_to_use);
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}
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// If the target.xml includes an architecture entry like
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// <architecture>i386:x86-64</architecture> (seen from VMWare ESXi)
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// <architecture>arm</architecture> (seen from Segger JLink on unspecified arm board)
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// use that if we don't have anything better.
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if (!arch_to_use.IsValid() && !target_info.arch.empty()) {
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if (target_info.arch == "i386:x86-64") {
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// We don't have any information about vendor or OS.
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arch_to_use.SetTriple("x86_64--");
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GetTarget().MergeArchitecture(arch_to_use);
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}
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// Initialize these outside of ParseRegisters, since they should not be
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// reset inside each include feature
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uint32_t cur_reg_num = 0;
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uint32_t reg_offset = 0;
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// SEGGER J-Link jtag boards send this very-generic arch name,
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// we'll need to use this if we have absolutely nothing better
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// to work with or the register definitions won't be accepted.
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if (target_info.arch == "arm") {
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arch_to_use.SetTriple("arm--");
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GetTarget().MergeArchitecture(arch_to_use);
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}
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}
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if (arch_to_use.IsValid()) {
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// Don't use Process::GetABI, this code gets called from DidAttach, and
|
||||
// in that context we haven't set the Target's architecture yet, so the
|
||||
// ABI is also potentially incorrect.
|
||||
|
|
@ -4621,26 +4639,31 @@ bool ProcessGDBRemote::GetGDBServerRegisterInfo(ArchSpec &arch_to_use) {
|
|||
}
|
||||
|
||||
for (const auto &include : target_info.includes) {
|
||||
// request register file
|
||||
std::string xml_data;
|
||||
if (!comm.ReadExtFeature(ConstString("features"), ConstString(include),
|
||||
xml_data, lldberr))
|
||||
continue;
|
||||
|
||||
XMLDocument include_xml_document;
|
||||
include_xml_document.ParseMemory(xml_data.data(), xml_data.size(),
|
||||
include.c_str());
|
||||
XMLNode include_feature_node =
|
||||
include_xml_document.GetRootElement("feature");
|
||||
if (include_feature_node) {
|
||||
ParseRegisters(include_feature_node, target_info,
|
||||
this->m_register_info, abi_to_use_sp, cur_reg_num,
|
||||
reg_offset);
|
||||
}
|
||||
GetGDBServerRegisterInfoXMLAndProcess(arch_to_use, include,
|
||||
cur_reg_num, reg_offset);
|
||||
}
|
||||
this->m_register_info.Finalize(arch_to_use);
|
||||
}
|
||||
} else {
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
// query the target of gdb-remote for extended target information returns
|
||||
// true on success (got register definitions), false on failure (did not).
|
||||
bool ProcessGDBRemote::GetGDBServerRegisterInfo(ArchSpec &arch_to_use) {
|
||||
// Make sure LLDB has an XML parser it can use first
|
||||
if (!XMLDocument::XMLEnabled())
|
||||
return false;
|
||||
|
||||
// check that we have extended feature read support
|
||||
if (!m_gdb_comm.GetQXferFeaturesReadSupported())
|
||||
return false;
|
||||
|
||||
uint32_t cur_reg_num = 0;
|
||||
uint32_t reg_offset = 0;
|
||||
if (GetGDBServerRegisterInfoXMLAndProcess (arch_to_use, "target.xml", cur_reg_num, reg_offset))
|
||||
this->m_register_info.Finalize(arch_to_use);
|
||||
|
||||
return m_register_info.GetNumRegisters() > 0;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -383,6 +383,11 @@ protected:
|
|||
|
||||
DynamicLoader *GetDynamicLoader() override;
|
||||
|
||||
bool GetGDBServerRegisterInfoXMLAndProcess(ArchSpec &arch_to_use,
|
||||
std::string xml_filename,
|
||||
uint32_t &cur_reg_num,
|
||||
uint32_t ®_offset);
|
||||
|
||||
// Query remote GDBServer for register information
|
||||
bool GetGDBServerRegisterInfo(ArchSpec &arch);
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue