Removed some Linux specific changes

Author: DhruvSrivastavaX

lldb/source/Plugins/Platform/AIX/PlatformAIX.cpp

@@ -80,11 +80,9 @@ void PlatformAIX::Initialize() {
   PlatformPOSIX::Initialize();
 
   if (g_initialize_count++ == 0) {
-#if defined(_AIX)
     PlatformSP default_platform_sp(new PlatformAIX(true));
     default_platform_sp->SetSystemArchitecture(HostInfo::GetArchitecture());
     Platform::SetHostPlatform(default_platform_sp);
-#endif
     PluginManager::RegisterPlugin(
         PlatformAIX::GetPluginNameStatic(false),
         PlatformAIX::GetPluginDescriptionStatic(false),
@@ -115,10 +113,6 @@ PlatformAIX::PlatformAIX(bool is_host)
     }
   } else {
     m_supported_architectures = CreateArchList(
-        {llvm::Triple::x86_64, llvm::Triple::x86, llvm::Triple::arm,
-         llvm::Triple::aarch64, llvm::Triple::mips64, llvm::Triple::mips64,
-         llvm::Triple::hexagon, llvm::Triple::mips, llvm::Triple::mips64el,
-         llvm::Triple::mipsel, llvm::Triple::systemz},
         llvm::Triple::AIX);
   }
 }
@@ -200,93 +194,9 @@ void PlatformAIX::CalculateTrapHandlerSymbolNames() {
   m_trap_handlers.push_back(ConstString("__restore_rt"));
 }
 
-static lldb::UnwindPlanSP GetAArch64TrapHanlderUnwindPlan(ConstString name) {
-  UnwindPlanSP unwind_plan_sp;
-  if (name != "__kernel_rt_sigreturn")
-    return unwind_plan_sp;
-
-  UnwindPlan::RowSP row = std::make_shared<UnwindPlan::Row>();
-  row->SetOffset(0);
-
-  // In the signal trampoline frame, sp points to an rt_sigframe[1], which is:
-  //  - 128-byte siginfo struct
-  //  - ucontext struct:
-  //     - 8-byte long (uc_flags)
-  //     - 8-byte pointer (uc_link)
-  //     - 24-byte stack_t
-  //     - 128-byte signal set
-  //     - 8 bytes of padding because sigcontext has 16-byte alignment
-  //     - sigcontext/mcontext_t
-  // [1]
-  // https://github.com/torvalds/linux/blob/master/arch/arm64/kernel/signal.c
-  int32_t offset = 128 + 8 + 8 + 24 + 128 + 8;
-  // Then sigcontext[2] is:
-  // - 8 byte fault address
-  // - 31 8 byte registers
-  // - 8 byte sp
-  // - 8 byte pc
-  // [2]
-  // https://github.com/torvalds/linux/blob/master/arch/arm64/include/uapi/asm/sigcontext.h
-
-  // Skip fault address
-  offset += 8;
-  row->GetCFAValue().SetIsRegisterPlusOffset(arm64_dwarf::sp, offset);
-
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x0, 0 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x1, 1 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x2, 2 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x3, 3 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x4, 4 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x5, 5 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x6, 6 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x7, 7 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x8, 8 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x9, 9 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x10, 10 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x11, 11 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x12, 12 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x13, 13 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x14, 14 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x15, 15 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x16, 16 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x17, 17 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x18, 18 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x19, 19 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x20, 20 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x21, 21 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x22, 22 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x23, 23 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x24, 24 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x25, 25 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x26, 26 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x27, 27 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x28, 28 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::fp, 29 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x30, 30 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::sp, 31 * 8, false);
-  row->SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::pc, 32 * 8, false);
-
-  // The sigcontext may also contain floating point and SVE registers.
-  // However this would require a dynamic unwind plan so they are not included
-  // here.
-
-  unwind_plan_sp = std::make_shared<UnwindPlan>(eRegisterKindDWARF);
-  unwind_plan_sp->AppendRow(row);
-  unwind_plan_sp->SetSourceName("AArch64 AIX sigcontext");
-  unwind_plan_sp->SetSourcedFromCompiler(eLazyBoolYes);
-  // Because sp is the same throughout the function
-  unwind_plan_sp->SetUnwindPlanValidAtAllInstructions(eLazyBoolYes);
-  unwind_plan_sp->SetUnwindPlanForSignalTrap(eLazyBoolYes);
-
-  return unwind_plan_sp;
-}
-
 lldb::UnwindPlanSP
 PlatformAIX::GetTrapHandlerUnwindPlan(const llvm::Triple &triple,
                                         ConstString name) {
-  if (triple.isAArch64())
-    return GetAArch64TrapHanlderUnwindPlan(name);
-
   return {};
 }
 
@@ -451,17 +361,6 @@ CompilerType PlatformAIX::GetSiginfoType(const llvm::Triple &triple) {
                                      }),
       lldb::eAccessPublic, 0);
 
-  // NB: SIGSYS is not present on ia64 but we don't seem to support that
-  ast->AddFieldToRecordType(
-      union_type, "_sigsys",
-      ast->CreateStructForIdentifier(ConstString(),
-                                     {
-                                         {"_call_addr", voidp_type},
-                                         {"_syscall", int_type},
-                                         {"_arch", uint_type},
-                                     }),
-      lldb::eAccessPublic, 0);
-
   ast->CompleteTagDeclarationDefinition(union_type);
   ast->AddFieldToRecordType(siginfo_type, "_sifields", union_type,
                             lldb::eAccessPublic, 0);