gdb: add target_ops::supports_displaced_step

[deliverable/binutils-gdb.git] / gdb / linux-nat-trad.h

diff --git a/gdb/linux-nat-trad.h b/gdb/linux-nat-trad.h
index 3b4a6c8595a92fed6dc63ee76570d39493d65d9f..04ff602d8c50184f6828c2ea4e963bc631e3612f 100644 (file)
--- a/gdb/linux-nat-trad.h
+++ b/gdb/linux-nat-trad.h
@@ -1,6 +1,6 @@
 /* Generic GNU/Linux target using traditional ptrace register access.
 
-   Copyright (C) 2000-2018 Free Software Foundation, Inc.
+   Copyright (C) 2000-2020 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -22,9 +22,25 @@
 
 #include "linux-nat.h"
 
-/* Create a generic GNU/Linux target using traditional
-   ptrace register access.  */
-struct target_ops *linux_trad_target
-  (CORE_ADDR (*register_u_offset)(struct gdbarch *, int, int));
+/* A prototype GNU/Linux target using traditional ptrace register
+   access.  A concrete type should override REGISTER_U_OFFSET.  */
+
+class linux_nat_trad_target : public linux_nat_target
+{
+public:
+  void fetch_registers (struct regcache *, int) override;
+  void store_registers (struct regcache *, int) override;
+
+protected:
+  /* Return the offset within the user area where a particular
+     register is stored.  */
+  virtual CORE_ADDR register_u_offset (struct gdbarch *gdbarch,
+                                      int regnum, int store) = 0;
+
+private:
+  /* Helpers.  See definition.  */
+  void fetch_register (struct regcache *regcache, int regnum);
+  void store_register (const struct regcache *regcache, int regnum);
+};
 
 #endif /* LINUX_NAT_TRAD_H */