* event-loop.c (event_handle_func): Adjust to use gdb_fildes_t.

[deliverable/binutils-gdb.git] / gdb / gdbserver / target.h

diff --git a/gdb/gdbserver/target.h b/gdb/gdbserver/target.h
index e974ecb0b5acb427edf34b36e254426f27a728fd..a621b324713eb21a1ba717b8b2e80f52bbe47624 100644 (file)
--- a/gdb/gdbserver/target.h
+++ b/gdb/gdbserver/target.h
@@ -53,7 +53,8 @@ struct thread_resume
   /* If non-zero, send this signal when we resume, or to stop the
      thread.  If stopping a thread, and this is 0, the target should
      stop the thread however it best decides to (e.g., SIGSTOP on
-     linux; SuspendThread on win32).  */
+     linux; SuspendThread on win32).  This is a host signal value (not
+     enum target_signal).  */
   int sig;
 };
 
@@ -180,6 +181,23 @@ struct target_ops
 
   void (*store_registers) (struct regcache *regcache, int regno);
 
+  /* Prepare to read or write memory from the inferior process.
+     Targets use this to do what is necessary to get the state of the
+     inferior such that it is possible to access memory.
+
+     This should generally only be called from client facing routines,
+     such as gdb_read_memory/gdb_write_memory, or the insert_point
+     callbacks.
+
+     Like `read_memory' and `write_memory' below, returns 0 on success
+     and errno on failure.  */
+
+  int (*prepare_to_access_memory) (void);
+
+  /* Undo the effects of prepare_to_access_memory.  */
+
+  void (*done_accessing_memory) (void);
+
   /* Read memory from the inferior process.  This should generally be
      called through read_inferior_memory, which handles breakpoint shadowing.
 
@@ -468,6 +486,18 @@ int start_non_stop (int nonstop);
 ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
               int connected_wait);
 
+#define prepare_to_access_memory()             \
+  (the_target->prepare_to_access_memory                \
+   ? (*the_target->prepare_to_access_memory) () \
+   : 0)
+
+#define done_accessing_memory()                                \
+  do                                                   \
+    {                                                  \
+      if (the_target->done_accessing_memory)           \
+       (*the_target->done_accessing_memory) ();        \
+    } while (0)
+
 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 
 int write_inferior_memory (CORE_ADDR memaddr, const unsigned char *myaddr,