gdb: add target_ops::supports_displaced_step

[deliverable/binutils-gdb.git] / gdb / bfd-target.c

diff --git a/gdb/bfd-target.c b/gdb/bfd-target.c
index a7dee242008e7ab4b82aab24e5a8321e77ea4d28..b75abd7fb0e62952865862503c48f528b95a1c08 100644 (file)
--- a/gdb/bfd-target.c
+++ b/gdb/bfd-target.c
@@ -1,6 +1,6 @@
 /* Very simple "bfd" target, for GDB, the GNU debugger.
 
-   Copyright (C) 2003-2013 Free Software Foundation, Inc.
+   Copyright (C) 2003-2020 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -23,79 +23,95 @@
 #include "exec.h"
 #include "gdb_bfd.h"
 
-/* The object that is stored in the target_ops->to_data field has this
-   type.  */
-struct target_bfd_data
+/* A target that wraps a BFD.  */
+
+static const target_info target_bfd_target_info = {
+  "bfd",
+  N_("BFD backed target"),
+  N_("You should never see this")
+};
+
+class target_bfd : public target_ops
 {
+public:
+  explicit target_bfd (struct bfd *bfd);
+  ~target_bfd () override;
+
+  const target_info &info () const override
+  { return target_bfd_target_info; }
+
+  strata stratum () const override { return file_stratum; }
+
+  void close () override;
+
+  target_xfer_status
+    xfer_partial (target_object object,
+                 const char *annex, gdb_byte *readbuf,
+                 const gdb_byte *writebuf,
+                 ULONGEST offset, ULONGEST len,
+                 ULONGEST *xfered_len) override;
+
+  target_section_table *get_section_table () override;
+
+private:
   /* The BFD we're wrapping.  */
-  struct bfd *bfd;
+  gdb_bfd_ref_ptr m_bfd;
 
   /* The section table build from the ALLOC sections in BFD.  Note
      that we can't rely on extracting the BFD from a random section in
      the table, since the table can be legitimately empty.  */
-  struct target_section_table table;
+  struct target_section_table m_table;
 };
 
-static LONGEST
-target_bfd_xfer_partial (struct target_ops *ops,
-                        enum target_object object,
-                        const char *annex, gdb_byte *readbuf,
-                        const gdb_byte *writebuf,
-                        ULONGEST offset, LONGEST len)
+target_xfer_status
+target_bfd::xfer_partial (target_object object,
+                         const char *annex, gdb_byte *readbuf,
+                         const gdb_byte *writebuf,
+                         ULONGEST offset, ULONGEST len,
+                         ULONGEST *xfered_len)
 {
   switch (object)
     {
     case TARGET_OBJECT_MEMORY:
       {
-       struct target_bfd_data *data = ops->to_data;
        return section_table_xfer_memory_partial (readbuf, writebuf,
-                                                 offset, len,
-                                                 data->table.sections,
-                                                 data->table.sections_end,
+                                                 offset, len, xfered_len,
+                                                 m_table.sections,
+                                                 m_table.sections_end,
                                                  NULL);
       }
     default:
-      return -1;
+      return TARGET_XFER_E_IO;
     }
 }
 
-static struct target_section_table *
-target_bfd_get_section_table (struct target_ops *ops)
+target_section_table *
+target_bfd::get_section_table ()
 {
-  struct target_bfd_data *data = ops->to_data;
-  return &data->table;
+  return &m_table;
 }
 
-static void
-target_bfd_xclose (struct target_ops *t)
+target_bfd::target_bfd (struct bfd *abfd)
+  : m_bfd (gdb_bfd_ref_ptr::new_reference (abfd))
 {
-  struct target_bfd_data *data = t->to_data;
+  m_table.sections = NULL;
+  m_table.sections_end = NULL;
+  build_section_table (abfd, &m_table.sections, &m_table.sections_end);
+}
 
-  gdb_bfd_unref (data->bfd);
-  xfree (data->table.sections);
-  xfree (data);
-  xfree (t);
+target_bfd::~target_bfd ()
+{
+  xfree (m_table.sections);
 }
 
-struct target_ops *
+target_ops *
 target_bfd_reopen (struct bfd *abfd)
 {
-  struct target_ops *t;
-  struct target_bfd_data *data;
-
-  data = XZALLOC (struct target_bfd_data);
-  data->bfd = abfd;
-  gdb_bfd_ref (abfd);
-  build_section_table (abfd, &data->table.sections, &data->table.sections_end);
-
-  t = XZALLOC (struct target_ops);
-  t->to_shortname = "bfd";
-  t->to_longname = _("BFD backed target");
-  t->to_doc = _("You should never see this");
-  t->to_get_section_table = target_bfd_get_section_table;
-  t->to_xfer_partial = target_bfd_xfer_partial;
-  t->to_xclose = target_bfd_xclose;
-  t->to_data = data;
-
-  return t;
+  return new target_bfd (abfd);
+}
+
+void
+target_bfd::close ()
+{
+  delete this;
 }