[Bug 1860553] Re: cmake crashes on qemu-alpha-user with Illegal Instruction

[Laurent Vivier <Laurent@vivier.eu>]

It seems halt instruction is not implemented for qemu-user, only for
qemu-system:


1286 #ifndef CONFIG_USER_ONLY
...
1365 static DisasJumpType gen_mtpr(DisasContext *ctx, TCGv vb, int regno)
1366 {
1367     int data;
1368 
1369     switch (regno) {
...
1390     case 252:
1391         /* HALT */
1392         gen_helper_halt(vb);
1393         return DISAS_PC_STALE;
...
1437 }
1438 #endif /* !USER_ONLY*/

...
2673     case 0x1D:
2674         /* HW_MTPR (PALcode) */
2675 #ifndef CONFIG_USER_ONLY
2676         REQUIRE_TB_FLAG(ENV_FLAG_PAL_MODE);
2677         vb = load_gpr(ctx, rb);
2678         ret = gen_mtpr(ctx, vb, insn & 0xffff);
2679         break;
2680 #else
2681         goto invalid_opc;
2682 #endif

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https://bugs.launchpad.net/bugs/1860553

Title:
  cmake crashes on qemu-alpha-user with Illegal Instruction

Status in QEMU:
  New

Bug description:
  I tried building cmake on Debian unstable for Alpha today using qemu-
  user and the compiled cmake binary crashed with "Illegal Instruction":

  g++ -Wl,-z,relro -Wl,--as-needed -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2             -I/<<PKGBUILDDIR>>/Build/Bootstrap.cmk   -I/<<PKGBUILDDIR>>/Source   -I/<<PKGBUILDDIR>>/Source/LexerParser   -I/<<PKGBUILDDIR>>/Utilities  cmAddCustomCommandCommand.o cmAddCustomTargetCommand.o cmAddDefinitionsCommand.o cmAddDependenciesCommand.o cmAddExecutableCommand.o cmAddLibraryCommand.o cmAddSubDirectoryCommand.o cmAddTestCommand.o cmArgumentParser.o cmBreakCommand.o cmBuildCommand.o cmCMakeMinimumRequired.o cmCMakePolicyCommand.o cmCPackPropertiesGenerator.o cmCacheManager.o cmCommand.o cmCommandArgumentParserHelper.o cmCommands.o cmCommonTargetGenerator.o cmComputeComponentGraph.o cmComputeLinkDepends.o cmComputeLinkInformation.o cmComputeTargetDepends.o cmConditionEvaluator.o cmConfigureFileCommand.o cmContinueCommand.o cmCoreTryCompile.o cmCreateTestSourceList.o cmCustomCommand.o cmCustomCommandGenerator.o cmDefinePropertyCommand.o cmDefinitions.o cmDepends.o cmDependsC.o cmDisallowedCommand.o cmDocumentationFormatter.o cmEnableLanguageCommand.o cmEnableTestingCommand.o cmExecProgramCommand.o cmExecuteProcessCommand.o cmExpandedCommandArgument.o cmExportBuildFileGenerator.o cmExportFileGenerator.o cmExportInstallFileGenerator.o cmExportSet.o cmExportSetMap.o cmExportTryCompileFileGenerator.o cmExprParserHelper.o cmExternalMakefileProjectGenerator.o cmFileCommand.o cmFileCopier.o cmFileInstaller.o cmFileTime.o cmFileTimeCache.o cmFileTimes.o cmFindBase.o cmFindCommon.o cmFindFileCommand.o cmFindLibraryCommand.o cmFindPackageCommand.o cmFindPathCommand.o cmFindProgramCommand.o cmForEachCommand.o cmFunctionCommand.o cmFSPermissions.o cmGeneratedFileStream.o cmGeneratorExpression.o cmGeneratorExpressionContext.o cmGeneratorExpressionDAGChecker.o cmGeneratorExpressionEvaluationFile.o cmGeneratorExpressionEvaluator.o cmGeneratorExpressionLexer.o cmGeneratorExpressionNode.o cmGeneratorExpressionParser.o cmGeneratorTarget.o cmGetCMakePropertyCommand.o cmGetDirectoryPropertyCommand.o cmGetFilenameComponentCommand.o cmGetPipes.o cmGetPropertyCommand.o cmGetSourceFilePropertyCommand.o cmGetTargetPropertyCommand.o cmGetTestPropertyCommand.o cmGlobalCommonGenerator.o cmGlobalGenerator.o cmGlobalUnixMakefileGenerator3.o cmGlobVerificationManager.o cmHexFileConverter.o cmIfCommand.o cmIncludeCommand.o cmIncludeGuardCommand.o cmIncludeDirectoryCommand.o cmIncludeRegularExpressionCommand.o cmInstallCommand.o cmInstallCommandArguments.o cmInstallDirectoryGenerator.o cmInstallExportGenerator.o cmInstallFilesCommand.o cmInstallFilesGenerator.o cmInstallGenerator.o cmInstallScriptGenerator.o cmInstallSubdirectoryGenerator.o cmInstallTargetGenerator.o cmInstallTargetsCommand.o cmInstalledFile.o cmLinkDirectoriesCommand.o cmLinkItem.o cmLinkLineComputer.o cmLinkLineDeviceComputer.o cmListCommand.o cmListFileCache.o cmLocalCommonGenerator.o cmLocalGenerator.o cmLocalUnixMakefileGenerator3.o cmMSVC60LinkLineComputer.o cmMacroCommand.o cmMakeDirectoryCommand.o cmMakefile.o cmMakefileExecutableTargetGenerator.o cmMakefileLibraryTargetGenerator.o cmMakefileTargetGenerator.o cmMakefileUtilityTargetGenerator.o cmMarkAsAdvancedCommand.o cmMathCommand.o cmMessageCommand.o cmMessenger.o cmNewLineStyle.o cmOSXBundleGenerator.o cmOptionCommand.o cmOrderDirectories.o cmOutputConverter.o cmParseArgumentsCommand.o cmPathLabel.o cmPolicies.o cmProcessOutput.o cmProjectCommand.o cmProperty.o cmPropertyDefinition.o cmPropertyDefinitionMap.o cmPropertyMap.o cmReturnCommand.o cmRulePlaceholderExpander.o cmScriptGenerator.o cmSearchPath.o cmSeparateArgumentsCommand.o cmSetCommand.o cmSetDirectoryPropertiesCommand.o cmSetPropertyCommand.o cmSetSourceFilesPropertiesCommand.o cmSetTargetPropertiesCommand.o cmSetTestsPropertiesCommand.o cmSiteNameCommand.o cmSourceFile.o cmSourceFileLocation.o cmState.o cmStateDirectory.o cmStateSnapshot.o cmStringReplaceHelper.o cmStringCommand.o cmSubdirCommand.o cmSystemTools.o cmTarget.o cmTargetCompileDefinitionsCommand.o cmTargetCompileFeaturesCommand.o cmTargetCompileOptionsCommand.o cmTargetIncludeDirectoriesCommand.o cmTargetLinkLibrariesCommand.o cmTargetPropCommandBase.o cmTargetPropertyComputer.o cmTargetSourcesCommand.o cmTest.o cmTestGenerator.o cmTimestamp.o cmTryCompileCommand.o cmTryRunCommand.o cmUnexpectedCommand.o cmUnsetCommand.o cmUVHandlePtr.o cmUVProcessChain.o cmVersion.o cmWhileCommand.o cmWorkingDirectory.o cmake.o cmakemain.o cmcmd.o cm_string_view.o cmCommandArgumentLexer.o cmCommandArgumentParser.o cmExprLexer.o cmExprParser.o cmListFileLexer.o Directory.o EncodingCXX.o FStream.o Glob.o RegularExpression.o SystemTools.o EncodingC.o ProcessUNIX.o String.o System.o Terminal.o uv-src-strscpy.c.o uv-src-timer.c.o uv-src-uv-common.c.o uv-src-unix-cmake-bootstrap.c.o uv-src-unix-core.c.o uv-src-unix-fs.c.o uv-src-unix-loop.c.o uv-src-unix-loop-watcher.c.o uv-src-unix-no-fsevents.c.o uv-src-unix-pipe.c.o uv-src-unix-poll.c.o uv-src-unix-posix-hrtime.c.o uv-src-unix-posix-poll.c.o uv-src-unix-process.c.o uv-src-unix-signal.c.o uv-src-unix-stream.c.o  -ldl -lrt -o cmake
  make[2]: Leaving directory '/<<PKGBUILDDIR>>/Build/Bootstrap.cmk'
  loading initial cache file /<<PKGBUILDDIR>>/Build/Bootstrap.cmk/InitialCacheFlags.cmake
  Illegal instruction
  ---------------------------------------------
  Error when bootstrapping CMake:
  Problem while running initial CMake
  ---------------------------------------------

  I'm working on creating a chroot for download to reproduce the issue.

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