(enum bfd_reloc_code_real): Put simple power-to-two relocs together, and add

[binutils.git] / gdb / target.c

diff --git a/gdb/target.c b/gdb/target.c
index d2536232365ad12b1d9e7b0f42e1bb6f3bcb8db2..5af8aae8bc81ca23c94a3235fb457bb176e11468 100644 (file)
--- a/gdb/target.c
+++ b/gdb/target.c
@@ -58,11 +58,18 @@ tcomplain PARAMS ((void));
 static int
 nomemory PARAMS ((CORE_ADDR, char *, int, int));
 
+static int
+return_zero PARAMS ((void));
+
 static void
 ignore PARAMS ((void));
+
 static void
 target_command PARAMS ((char *, int));
 
+static struct target_ops *
+find_default_run_target PARAMS ((char *));
+
 /* Pointer to array of target architecture structures; the size of the
    array; the current index into the array; the allocated size of the 
    array.  */
@@ -76,15 +83,18 @@ unsigned target_struct_allocsize;
    current target.  */
 
 struct target_ops dummy_target = {"None", "None", "",
-    0, 0, 0, 0,                /* open, close, attach, detach */
+    0, 0,              /* open, close */
+    find_default_attach, 0,  /* attach, detach */
     0, 0,              /* resume, wait */
-    0, 0, 0, 0, 0,     /* registers */
+    0, 0, 0,           /* registers */
     0, 0,              /* memory */
     0, 0,              /* bkpts */
     0, 0, 0, 0, 0,     /* terminal */
     0, 0,              /* kill, load */
     0,                         /* lookup_symbol */
-    0, 0,              /* create_inferior, mourn_inferior */
+    find_default_create_inferior, /* create_inferior */
+    0,                 /* mourn_inferior */
+    0,                 /* can_run */
     dummy_stratum, 0,  /* stratum, next */
     0, 0, 0, 0, 0,     /* all mem, mem, stack, regs, exec */
     0, 0,              /* section pointers */
@@ -112,7 +122,8 @@ target_command (arg, from_tty)
      char *arg;
      int from_tty;
 {
-  fputs_filtered ("Argument required (target name).\n", stdout);
+  fputs_filtered ("Argument required (target name).  Try `help target'\n",
+                 stdout);
 }
 
 /* Add a possible target architecture to the list.  */
@@ -309,8 +320,6 @@ cleanup_target (t)
   de_fault (to_fetch_registers,        (void (*)())ignore);
   de_fault (to_store_registers,                (void (*)())noprocess);
   de_fault (to_prepare_to_store,       (void (*)())noprocess);
-  de_fault (to_convert_to_virtual,     host_convert_to_virtual);
-  de_fault (to_convert_from_virtual,   host_convert_from_virtual);
   de_fault (to_xfer_memory,            (int (*)())nomemory);
   de_fault (to_files_info,             (void (*)())ignore);
   de_fault (to_insert_breakpoint,      memory_insert_breakpoint);
@@ -325,6 +334,7 @@ cleanup_target (t)
   de_fault (to_lookup_symbol,          nosymbol);
   de_fault (to_create_inferior,                maybe_kill_then_create_inferior);
   de_fault (to_mourn_inferior,         (void (*)())noprocess);
+  de_fault (to_can_run,                        return_zero);
   de_fault (to_next,                   0);
   de_fault (to_has_all_memory,         0);
   de_fault (to_has_memory,             0);
@@ -522,7 +532,7 @@ target_xfer_memory (memaddr, myaddr, len, write)
          /* If this address is for nonexistent memory,
             read zeros if reading, or do nothing if writing.  Return error. */
          if (!write)
-           (void) memset (myaddr, 0, len);
+           memset (myaddr, 0, len);
          if (errno == 0)
            return EIO;
          else
@@ -586,6 +596,69 @@ target_preopen (from_tty)
     }
 }
 
+/* Look through the list of possible targets for a target that can
+   execute a run or attach command without any other data.  This is
+   used to locate the default process stratum.
+
+   Result is always valid (error() is called for errors).  */
+
+static struct target_ops *
+find_default_run_target (do_mesg)
+     char *do_mesg;
+{
+  struct target_ops **t;
+  struct target_ops *runable;
+  int count;
+
+  count = 0;
+
+  for (t = target_structs; t < target_structs + target_struct_size;
+       ++t)
+    {
+      if (target_can_run(*t))
+       {
+         runable = *t;
+         ++count;
+       }
+    }
+
+  if (count != 1)
+    error ("Don't know how to %s.  Try \"help target\".", do_mesg);
+
+  return runable;
+}
+
+void
+find_default_attach (args, from_tty)
+     char *args;
+     int from_tty;
+{
+  struct target_ops *t;
+
+  t = find_default_run_target("attach");
+  (t->to_attach) (args, from_tty);
+  return;
+}
+
+void
+find_default_create_inferior (exec_file, allargs, env)
+     char *exec_file;
+     char *allargs;
+     char **env;
+{
+  struct target_ops *t;
+
+  t = find_default_run_target("run");
+  (t->to_create_inferior) (exec_file, allargs, env);
+  return;
+}
+
+static int
+return_zero ()
+{
+  return 0;
+}
+
 static char targ_desc[] = 
     "Names of targets and files being debugged.\n\
 Shows the entire stack of targets currently in use (including the exec-file,\n\