[llvm-branch-commits] [lldb] [lldb][LoongArch] Function calls support in lldb expressions (PR #114742)

[Lu Weining via llvm-branch-commits]

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@@ -0,0 +1,104 @@
+//===-- ABISysV_loongarch.h -------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_SOURCE_PLUGINS_ABI_LOONGARCH_ABISYSV_LOONGARCH_H
+#define LLDB_SOURCE_PLUGINS_ABI_LOONGARCH_ABISYSV_LOONGARCH_H
+
+// Other libraries and framework includes
+#include "llvm/TargetParser/Triple.h"
+
+// Project includes
+#include "lldb/Target/ABI.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Utility/Flags.h"
+#include "lldb/lldb-private.h"
+
+class ABISysV_loongarch : public lldb_private::RegInfoBasedABI {
+public:
+  ~ABISysV_loongarch() override = default;
+
+  size_t GetRedZoneSize() const override { return 0; }
+
+  bool PrepareTrivialCall(lldb_private::Thread &thread, lldb::addr_t sp,
+                          lldb::addr_t functionAddress,
+                          lldb::addr_t returnAddress,
+                          llvm::ArrayRef<lldb::addr_t> args) const override;
+
+  bool GetArgumentValues(lldb_private::Thread &thread,
+                         lldb_private::ValueList &values) const override;
+
+  lldb_private::Status
+  SetReturnValueObject(lldb::StackFrameSP &frame_sp,
+                       lldb::ValueObjectSP &new_value) override;
+
+  lldb::ValueObjectSP
+  GetReturnValueObjectImpl(lldb_private::Thread &thread,
+                           lldb_private::CompilerType &type) const override;
+
+  bool
+  CreateFunctionEntryUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override;
+
+  bool CreateDefaultUnwindPlan(lldb_private::UnwindPlan &unwind_plan) override;
+
+  bool RegisterIsVolatile(const lldb_private::RegisterInfo *reg_info) override;
+
+  bool CallFrameAddressIsValid(lldb::addr_t cfa) override {
+    // The CFA must be 16 byte aligned.
+    return (cfa & 0xfull) == 0;
+  }
+
+  void SetIsLA64(bool is_la64) { m_is_la64 = is_la64; }
+
+  bool CodeAddressIsValid(lldb::addr_t pc) override {
+    // Code address must be 4 byte aligned.
+    if (pc & (4ull - 1ull))
+      return false;
+
+    return true;
+  }
+
+  const lldb_private::RegisterInfo *
+  GetRegisterInfoArray(uint32_t &count) override;
+
+  //------------------------------------------------------------------
+  // Static Functions
+  //------------------------------------------------------------------
+
+  static void Initialize();
+
+  static void Terminate();
+
+  static lldb::ABISP CreateInstance(lldb::ProcessSP process_sp,
+                                    const lldb_private::ArchSpec &arch);
+
+  static llvm::StringRef GetPluginNameStatic() { return "sysv-loongarch"; }
+
+  //------------------------------------------------------------------
+  // PluginInterface protocol
+  //------------------------------------------------------------------
+
+  llvm::StringRef GetPluginName() override { return GetPluginNameStatic(); }
+
+protected:
+  void AugmentRegisterInfo(
+      std::vector<lldb_private::DynamicRegisterInfo::Register> &regs) override;
+
+  bool RegisterIsCalleeSaved(const lldb_private::RegisterInfo *reg_info);
+
+private:
+  lldb::ValueObjectSP
+  GetReturnValueObjectSimple(lldb_private::Thread &thread,
+                             lldb_private::CompilerType &ast_type) const;
+
+  using lldb_private::RegInfoBasedABI::RegInfoBasedABI; // Call CreateInstance
+                                                        // instead.
+  bool m_is_la64; // true if target is loongarch64; false if target is
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SixWeining wrote:

Seems the comments are redundant.

https://github.com/llvm/llvm-project/pull/114742