commit 5870472fdd17f33d923b02e3e0acb9cbb18dbc9a
author zhanglimin <zhanglimin@loongson.cn> Tue Nov 15 14:36:30 2022 +0800
committer Copybara-Service <copybara-worker@google.com> Mon Nov 14 22:40:49 2022 -0800
tree c976c799814866a44b373a06608136bce70a63c6
parent 86213b7902ad64cad566fc4878024ad26654d56a

[libunwind][LoongArch] Add 64-bit LoongArch support

Defines enums for the LoongArch registers.
Adds the register class implementation for LoongArch.
Adds save and restore context functionality.

This only supports 64 bits integer and float-point register
implementation.

Fix https://github.com/llvm/llvm-project/issues/55398

Reviewed By: SixWeining

Differential Revision: https://reviews.llvm.org/D137010

NOKEYCHECK=True
GitOrigin-RevId: c5072695127e767a76973cdbed683215df31fa40

src/UnwindCursor.hpp

diff --git a/src/UnwindCursor.hpp b/src/UnwindCursor.hpp
index f118497..0c6cda3 100644
--- a/src/UnwindCursor.hpp
+++ b/src/UnwindCursor.hpp
@@ -1064,6 +1064,10 @@
   }
 #endif
 
+#if defined(_LIBUNWIND_TARGET_LOONGARCH)
+  int stepWithCompactEncoding(Registers_loongarch &) { return UNW_EINVAL; }
+#endif
+
 #if defined(_LIBUNWIND_TARGET_SPARC)
   int stepWithCompactEncoding(Registers_sparc &) { return UNW_EINVAL; }
 #endif
@@ -1140,6 +1144,12 @@
   }
 #endif
 
+#if defined(_LIBUNWIND_TARGET_LOONGARCH)
+  bool compactSaysUseDwarf(Registers_loongarch &, uint32_t *) const {
+    return true;
+  }
+#endif
+
 #if defined(_LIBUNWIND_TARGET_SPARC)
   bool compactSaysUseDwarf(Registers_sparc &, uint32_t *) const { return true; }
 #endif
@@ -1224,6 +1234,12 @@
   }
 #endif
 
+#if defined(_LIBUNWIND_TARGET_LOONGARCH)
+  compact_unwind_encoding_t dwarfEncoding(Registers_loongarch &) const {
+    return 0;
+  }
+#endif
+
 #if defined(_LIBUNWIND_TARGET_SPARC)
   compact_unwind_encoding_t dwarfEncoding(Registers_sparc &) const { return 0; }
 #endif