gdb: add target_ops::supports_displaced_step
[deliverable/binutils-gdb.git] / gdbserver / target.h
index d728646d274c5b6a221cb17efab22fa2ce1d8390..701c8ef87675fa05327f668d7156acde0982942c 100644 (file)
@@ -63,78 +63,15 @@ struct thread_resume
   CORE_ADDR step_range_end;    /* Exclusive */
 };
 
-class process_target;
-
 /* GDBserver doesn't have a concept of strata like GDB, but we call
    its target vector "process_stratum" anyway for the benefit of
    shared code.  */
-struct process_stratum_target
-{
-  /* Multiple-filesystem-aware open.  Like open(2), but operating in
-     the filesystem as it appears to process PID.  Systems where all
-     processes share a common filesystem should set this to NULL.
-     If NULL, the caller should fall back to open(2).  */
-  int (*multifs_open) (int pid, const char *filename,
-                      int flags, mode_t mode);
-
-  /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
-     in the filesystem as it appears to process PID.  Systems where
-     all processes share a common filesystem should set this to NULL.
-     If NULL, the caller should fall back to unlink(2).  */
-  int (*multifs_unlink) (int pid, const char *filename);
-
-  /* Multiple-filesystem-aware readlink.  Like readlink(2), but
-     operating in the filesystem as it appears to process PID.
-     Systems where all processes share a common filesystem should
-     set this to NULL.  If NULL, the caller should fall back to
-     readlink(2).  */
-  ssize_t (*multifs_readlink) (int pid, const char *filename,
-                              char *buf, size_t bufsiz);
-
-  /* Return the breakpoint kind for this target based on PC.  The PCPTR is
-     adjusted to the real memory location in case a flag (e.g., the Thumb bit on
-     ARM) was present in the PC.  */
-  int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr);
-
-  /* Return the software breakpoint from KIND.  KIND can have target
-     specific meaning like the Z0 kind parameter.
-     SIZE is set to the software breakpoint's length in memory.  */
-  const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
 
-  /* Return the thread's name, or NULL if the target is unable to determine it.
-     The returned value must not be freed by the caller.  */
-  const char *(*thread_name) (ptid_t thread);
-
-  /* Return the breakpoint kind for this target based on the current
-     processor state (e.g. the current instruction mode on ARM) and the
-     PC.  The PCPTR is adjusted to the real memory location in case a flag
-     (e.g., the Thumb bit on ARM) is present in the PC.  */
-  int (*breakpoint_kind_from_current_state) (CORE_ADDR *pcptr);
-
-  /* Returns true if the target can software single step.  */
-  int (*supports_software_single_step) (void);
-
-  /* Return 1 if the target supports catch syscall, 0 (or leave the
-     callback NULL) otherwise.  */
-  int (*supports_catch_syscall) (void);
-
-  /* Return tdesc index for IPA.  */
-  int (*get_ipa_tdesc_idx) (void);
-
-  /* Thread ID to (numeric) thread handle: Return true on success and
-     false for failure.  Return pointer to thread handle via HANDLE
-     and the handle's length via HANDLE_LEN.  */
-  bool (*thread_handle) (ptid_t ptid, gdb_byte **handle, int *handle_len);
-
-  /* The object that will gradually replace this struct.  */
-  process_target *pt;
-};
-
-class process_target
+class process_stratum_target
 {
 public:
 
-  virtual ~process_target () = default;
+  virtual ~process_stratum_target () = default;
 
   /* Start a new process.
 
@@ -501,6 +438,65 @@ public:
      string should be copied into a buffer by the client if the string
      will not be immediately used, or if it must persist.  */
   virtual char *pid_to_exec_file (int pid);
+
+  /* Return true if any of the multifs ops is supported.  */
+  virtual bool supports_multifs ();
+
+  /* Multiple-filesystem-aware open.  Like open(2), but operating in
+     the filesystem as it appears to process PID.  Systems where all
+     processes share a common filesystem should not override this.
+     The default behavior is to use open(2).  */
+  virtual int multifs_open (int pid, const char *filename,
+                           int flags, mode_t mode);
+
+  /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
+     in the filesystem as it appears to process PID.  Systems where
+     all processes share a common filesystem should not override this.
+     The default behavior is to use unlink(2).  */
+  virtual int multifs_unlink (int pid, const char *filename);
+
+  /* Multiple-filesystem-aware readlink.  Like readlink(2), but
+     operating in the filesystem as it appears to process PID.
+     Systems where all processes share a common filesystem should
+     not override this.  The default behavior is to use readlink(2).  */
+  virtual ssize_t multifs_readlink (int pid, const char *filename,
+                                   char *buf, size_t bufsiz);
+
+  /* Return the breakpoint kind for this target based on PC.  The
+     PCPTR is adjusted to the real memory location in case a flag
+     (e.g., the Thumb bit on ARM) was present in the PC.  */
+  virtual int breakpoint_kind_from_pc (CORE_ADDR *pcptr);
+
+  /* Return the software breakpoint from KIND.  KIND can have target
+     specific meaning like the Z0 kind parameter.
+     SIZE is set to the software breakpoint's length in memory.  */
+  virtual const gdb_byte *sw_breakpoint_from_kind (int kind, int *size) = 0;
+
+  /* Return the breakpoint kind for this target based on the current
+     processor state (e.g. the current instruction mode on ARM) and the
+     PC.  The PCPTR is adjusted to the real memory location in case a
+     flag (e.g., the Thumb bit on ARM) is present in the  PC.  */
+  virtual int breakpoint_kind_from_current_state (CORE_ADDR *pcptr);
+
+  /* Return the thread's name, or NULL if the target is unable to
+     determine it.  The returned value must not be freed by the
+     caller.  */
+  virtual const char *thread_name (ptid_t thread);
+
+  /* Thread ID to (numeric) thread handle: Return true on success and
+     false for failure.  Return pointer to thread handle via HANDLE
+     and the handle's length via HANDLE_LEN.  */
+  virtual bool thread_handle (ptid_t ptid, gdb_byte **handle,
+                             int *handle_len);
+
+  /* Returns true if the target can software single step.  */
+  virtual bool supports_software_single_step ();
+
+  /* Return true if the target supports catch syscall.  */
+  virtual bool supports_catch_syscall ();
+
+  /* Return tdesc index for IPA.  */
+  virtual int get_ipa_tdesc_idx ();
 };
 
 extern process_stratum_target *the_target;
@@ -508,80 +504,78 @@ extern process_stratum_target *the_target;
 void set_target_ops (process_stratum_target *);
 
 #define target_create_inferior(program, program_args)  \
-  the_target->pt->create_inferior (program, program_args)
+  the_target->create_inferior (program, program_args)
 
 #define target_post_create_inferior()                   \
-  the_target->pt->post_create_inferior ()
+  the_target->post_create_inferior ()
 
 #define myattach(pid) \
-  the_target->pt->attach (pid)
+  the_target->attach (pid)
 
 int kill_inferior (process_info *proc);
 
 #define target_supports_fork_events() \
-  the_target->pt->supports_fork_events ()
+  the_target->supports_fork_events ()
 
 #define target_supports_vfork_events() \
-  the_target->pt->supports_vfork_events ()
+  the_target->supports_vfork_events ()
 
 #define target_supports_exec_events() \
-  the_target->pt->supports_exec_events ()
+  the_target->supports_exec_events ()
 
 #define target_handle_new_gdb_connection()              \
-  the_target->pt->handle_new_gdb_connection ()
+  the_target->handle_new_gdb_connection ()
 
 #define detach_inferior(proc) \
-  the_target->pt->detach (proc)
+  the_target->detach (proc)
 
 #define mythread_alive(pid) \
-  the_target->pt->thread_alive (pid)
+  the_target->thread_alive (pid)
 
 #define fetch_inferior_registers(regcache, regno)      \
-  the_target->pt->fetch_registers (regcache, regno)
+  the_target->fetch_registers (regcache, regno)
 
 #define store_inferior_registers(regcache, regno) \
-  the_target->pt->store_registers (regcache, regno)
+  the_target->store_registers (regcache, regno)
 
 #define join_inferior(pid) \
-  the_target->pt->join (pid)
+  the_target->join (pid)
 
 #define target_supports_non_stop() \
-  the_target->pt->supports_non_stop ()
+  the_target->supports_non_stop ()
 
 #define target_async(enable) \
-  the_target->pt->async (enable)
+  the_target->async (enable)
 
 #define target_process_qsupported(features, count)     \
-  the_target->pt->process_qsupported (features, count)
+  the_target->process_qsupported (features, count)
 
 #define target_supports_catch_syscall()                \
-  (the_target->supports_catch_syscall ?                        \
-   (*the_target->supports_catch_syscall) () : 0)
+  the_target->supports_catch_syscall ()
 
 #define target_get_ipa_tdesc_idx()                     \
-  (the_target->get_ipa_tdesc_idx                       \
-   ? (*the_target->get_ipa_tdesc_idx) () : 0)
+  the_target->get_ipa_tdesc_idx ()
 
 #define target_supports_tracepoints()                  \
-  the_target->pt->supports_tracepoints ()
+  the_target->supports_tracepoints ()
 
 #define target_supports_fast_tracepoints()             \
-  the_target->pt->supports_fast_tracepoints ()
+  the_target->supports_fast_tracepoints ()
 
 #define target_get_min_fast_tracepoint_insn_len()      \
-  the_target->pt->get_min_fast_tracepoint_insn_len ()
+  the_target->get_min_fast_tracepoint_insn_len ()
 
 #define target_thread_stopped(thread) \
-  the_target->pt->thread_stopped (thread)
+  the_target->thread_stopped (thread)
 
 #define target_pause_all(freeze)               \
-  the_target->pt->pause_all (freeze)
+  the_target->pause_all (freeze)
 
 #define target_unpause_all(unfreeze)           \
-  the_target->pt->unpause_all (unfreeze)
+  the_target->unpause_all (unfreeze)
 
 #define target_stabilize_threads()             \
-  the_target->pt->stabilize_threads ()
+  the_target->stabilize_threads ()
 
 #define target_install_fast_tracepoint_jump_pad(tpoint, tpaddr,                \
                                                collector, lockaddr,    \
@@ -593,36 +587,36 @@ int kill_inferior (process_info *proc);
                                                adjusted_insn_addr,     \
                                                adjusted_insn_addr_end, \
                                                err)                    \
-  the_target->pt->install_fast_tracepoint_jump_pad (tpoint, tpaddr,    \
-                                                   collector,lockaddr, \
-                                                   orig_size, jump_entry, \
-                                                   trampoline,         \
-                                                   trampoline_size,    \
-                                                   jjump_pad_insn,     \
-                                                   jjump_pad_insn_size, \
-                                                   adjusted_insn_addr, \
-                                                   adjusted_insn_addr_end, \
-                                                   err)
+  the_target->install_fast_tracepoint_jump_pad (tpoint, tpaddr,        \
+                                               collector,lockaddr,     \
+                                               orig_size, jump_entry,  \
+                                               trampoline,             \
+                                               trampoline_size,        \
+                                               jjump_pad_insn,         \
+                                               jjump_pad_insn_size,    \
+                                               adjusted_insn_addr,     \
+                                               adjusted_insn_addr_end, \
+                                               err)
 
 #define target_emit_ops() \
-  the_target->pt->emit_ops ()
+  the_target->emit_ops ()
 
 #define target_supports_disable_randomization() \
-  the_target->pt->supports_disable_randomization ()
+  the_target->supports_disable_randomization ()
 
 #define target_supports_agent() \
-  the_target->pt->supports_agent ()
+  the_target->supports_agent ()
 
 static inline struct btrace_target_info *
 target_enable_btrace (ptid_t ptid, const struct btrace_config *conf)
 {
-  return the_target->pt->enable_btrace (ptid, conf);
+  return the_target->enable_btrace (ptid, conf);
 }
 
 static inline int
 target_disable_btrace (struct btrace_target_info *tinfo)
 {
-  return the_target->pt->disable_btrace (tinfo);
+  return the_target->disable_btrace (tinfo);
 }
 
 static inline int
@@ -630,47 +624,42 @@ target_read_btrace (struct btrace_target_info *tinfo,
                    struct buffer *buffer,
                    enum btrace_read_type type)
 {
-  return the_target->pt->read_btrace (tinfo, buffer, type);
+  return the_target->read_btrace (tinfo, buffer, type);
 }
 
 static inline int
 target_read_btrace_conf (struct btrace_target_info *tinfo,
                         struct buffer *buffer)
 {
-  return the_target->pt->read_btrace_conf (tinfo, buffer);
+  return the_target->read_btrace_conf (tinfo, buffer);
 }
 
 #define target_supports_range_stepping() \
-  the_target->pt->supports_range_stepping ()
+  the_target->supports_range_stepping ()
 
 #define target_supports_stopped_by_sw_breakpoint() \
-  the_target->pt->supports_stopped_by_sw_breakpoint ()
+  the_target->supports_stopped_by_sw_breakpoint ()
 
 #define target_stopped_by_sw_breakpoint() \
-  the_target->pt->stopped_by_sw_breakpoint ()
+  the_target->stopped_by_sw_breakpoint ()
 
 #define target_supports_stopped_by_hw_breakpoint() \
-  the_target->pt->supports_stopped_by_hw_breakpoint ()
+  the_target->supports_stopped_by_hw_breakpoint ()
 
 #define target_supports_hardware_single_step() \
-  the_target->pt->supports_hardware_single_step ()
+  the_target->supports_hardware_single_step ()
 
 #define target_stopped_by_hw_breakpoint() \
-  the_target->pt->stopped_by_hw_breakpoint ()
+  the_target->stopped_by_hw_breakpoint ()
 
 #define target_breakpoint_kind_from_pc(pcptr) \
-  (the_target->breakpoint_kind_from_pc \
-   ? (*the_target->breakpoint_kind_from_pc) (pcptr) \
-   : default_breakpoint_kind_from_pc (pcptr))
+  the_target->breakpoint_kind_from_pc (pcptr)
 
 #define target_breakpoint_kind_from_current_state(pcptr) \
-  (the_target->breakpoint_kind_from_current_state \
-   ? (*the_target->breakpoint_kind_from_current_state) (pcptr) \
-   : target_breakpoint_kind_from_pc (pcptr))
+  the_target->breakpoint_kind_from_current_state (pcptr)
 
 #define target_supports_software_single_step() \
-  (the_target->supports_software_single_step ? \
-   (*the_target->supports_software_single_step) () : 0)
+  the_target->supports_software_single_step ()
 
 ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
               int connected_wait);
@@ -682,16 +671,13 @@ int prepare_to_access_memory (void);
 void done_accessing_memory (void);
 
 #define target_core_of_thread(ptid)            \
-  the_target->pt->core_of_thread (ptid)
+  the_target->core_of_thread (ptid)
 
 #define target_thread_name(ptid)                                \
-  (the_target->thread_name ? (*the_target->thread_name) (ptid)  \
-   : NULL)
+  the_target->thread_name (ptid)
 
 #define target_thread_handle(ptid, handle, handle_len) \
-   (the_target->thread_handle ? (*the_target->thread_handle) \
-                                  (ptid, handle, handle_len) \
-   : false)
+  the_target->thread_handle (ptid, handle, handle_len)
 
 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 
@@ -699,6 +685,4 @@ int set_desired_thread ();
 
 const char *target_pid_to_str (ptid_t);
 
-int default_breakpoint_kind_from_pc (CORE_ADDR *pcptr);
-
 #endif /* GDBSERVER_TARGET_H */
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