/* Target operations for the remote server for GDB.
- Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008
+ Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
Contributed by MontaVista Software.
#ifndef TARGET_H
#define TARGET_H
-/* This structure describes how to resume a particular thread (or
- all threads) based on the client's request. If thread is -1, then
- this entry applies to all threads. These are generally passed around
- as an array, and terminated by a thread == -1 entry. */
+/* Ways to "resume" a thread. */
-struct thread_resume
+enum resume_kind
{
- unsigned long thread;
+ /* Thread should continue. */
+ resume_continue,
+
+ /* Thread should single-step. */
+ resume_step,
+
+ /* Thread should be stopped. */
+ resume_stop
+};
- /* If non-zero, leave this thread stopped. */
- int leave_stopped;
+/* This structure describes how to resume a particular thread (or all
+ threads) based on the client's request. If thread is -1, then this
+ entry applies to all threads. These are passed around as an
+ array. */
+
+struct thread_resume
+{
+ ptid_t thread;
- /* If non-zero, we want to single-step. */
- int step;
+ /* How to "resume". */
+ enum resume_kind kind;
- /* If non-zero, send this signal when we 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). */
int sig;
};
+/* Generally, what has the program done? */
+enum target_waitkind
+ {
+ /* The program has exited. The exit status is in
+ value.integer. */
+ TARGET_WAITKIND_EXITED,
+
+ /* The program has stopped with a signal. Which signal is in
+ value.sig. */
+ TARGET_WAITKIND_STOPPED,
+
+ /* The program has terminated with a signal. Which signal is in
+ value.sig. */
+ TARGET_WAITKIND_SIGNALLED,
+
+ /* The program is letting us know that it dynamically loaded
+ something. */
+ TARGET_WAITKIND_LOADED,
+
+ /* The program has exec'ed a new executable file. The new file's
+ pathname is pointed to by value.execd_pathname. */
+ TARGET_WAITKIND_EXECD,
+
+ /* Nothing of interest to GDB happened, but we stopped anyway. */
+ TARGET_WAITKIND_SPURIOUS,
+
+ /* An event has occurred, but we should wait again. In this case,
+ we want to go back to the event loop and wait there for another
+ event from the inferior. */
+ TARGET_WAITKIND_IGNORE
+ };
+
+struct target_waitstatus
+ {
+ enum target_waitkind kind;
+
+ /* Forked child pid, execd pathname, exit status or signal number. */
+ union
+ {
+ int integer;
+ enum target_signal sig;
+ ptid_t related_pid;
+ char *execd_pathname;
+ }
+ value;
+ };
+
+/* Options that can be passed to target_ops->wait. */
+
+#define TARGET_WNOHANG 1
+
struct target_ops
{
/* Start a new process.
int (*attach) (unsigned long pid);
- /* Kill all inferiors. */
-
- void (*kill) (void);
+ /* Kill inferior PID. Return -1 on failure, and 0 on success. */
- /* Detach from all inferiors.
- Return -1 on failure, and 0 on success. */
+ int (*kill) (int pid);
- int (*detach) (void);
+ /* Detach from inferior PID. Return -1 on failure, and 0 on
+ success. */
- /* Wait for inferiors to end. */
+ int (*detach) (int pid);
- void (*join) (void);
+ /* Wait for inferior PID to exit. */
+ void (*join) (int pid);
/* Return 1 iff the thread with process ID PID is alive. */
- int (*thread_alive) (unsigned long pid);
+ int (*thread_alive) (ptid_t pid);
/* Resume the inferior process. */
- void (*resume) (struct thread_resume *resume_info);
+ void (*resume) (struct thread_resume *resume_info, size_t n);
- /* Wait for the inferior process to change state.
+ /* Wait for the inferior process or thread to change state. Store
+ status through argument pointer STATUS.
- STATUS will be filled in with a response code to send to GDB.
+ PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
+ wait for any thread of process pid to do something. Return ptid
+ of child, or -1 in case of error; store status through argument
+ pointer STATUS. OPTIONS is a bit set of options defined as
+ TARGET_W* above. If options contains TARGET_WNOHANG and there's
+ no child stop to report, return is
+ null_ptid/TARGET_WAITKIND_IGNORE. */
- Returns the signal which caused the process to stop, in the
- remote protocol numbering (e.g. TARGET_SIGNAL_STOP), or the
- exit code as an integer if *STATUS is 'W'. */
-
- unsigned char (*wait) (char *status);
+ ptid_t (*wait) (ptid_t ptid, struct target_waitstatus *status, int options);
/* Fetch registers from the inferior process.
int (*read_auxv) (CORE_ADDR offset, unsigned char *myaddr,
unsigned int len);
- /* Insert and remove a hardware watchpoint.
- Returns 0 on success, -1 on failure and 1 on unsupported.
+ /* Insert and remove a break or watchpoint.
+ Returns 0 on success, -1 on failure and 1 on unsupported.
The type is coded as follows:
- 2 = write watchpoint
- 3 = read watchpoint
- 4 = access watchpoint
- */
+ '0' - software-breakpoint
+ '1' - hardware-breakpoint
+ '2' - write watchpoint
+ '3' - read watchpoint
+ '4' - access watchpoint */
- int (*insert_watchpoint) (char type, CORE_ADDR addr, int len);
- int (*remove_watchpoint) (char type, CORE_ADDR addr, int len);
+ int (*insert_point) (char type, CORE_ADDR addr, int len);
+ int (*remove_point) (char type, CORE_ADDR addr, int len);
/* Returns 1 if target was stopped due to a watchpoint hit, 0 otherwise. */
int (*stopped_by_watchpoint) (void);
- /* Returns the address associated with the watchpoint that hit, if any;
+ /* Returns the address associated with the watchpoint that hit, if any;
returns 0 otherwise. */
CORE_ADDR (*stopped_data_address) (void);
/* Reports the text, data offsets of the executable. This is
needed for uclinux where the executable is relocated during load
time. */
-
+
int (*read_offsets) (CORE_ADDR *text, CORE_ADDR *data);
/* Fetch the address associated with a specific thread local storage
int (*get_tls_address) (struct thread_info *thread, CORE_ADDR offset,
CORE_ADDR load_module, CORE_ADDR *address);
- /* Return a string identifying the current architecture, or NULL if
- this operation is not supported. */
- const char *(*arch_string) (void);
-
/* Read/Write from/to spufs using qXfer packets. */
int (*qxfer_spu) (const char *annex, unsigned char *readbuf,
unsigned const char *writebuf, CORE_ADDR offset, int len);
+
+ /* Fill BUF with an hostio error packet representing the last hostio
+ error. */
+ void (*hostio_last_error) (char *buf);
+
+ /* Read/Write OS data using qXfer packets. */
+ int (*qxfer_osdata) (const char *annex, unsigned char *readbuf,
+ unsigned const char *writebuf, CORE_ADDR offset,
+ int len);
+
+ /* Read/Write extra signal info. */
+ int (*qxfer_siginfo) (const char *annex, unsigned char *readbuf,
+ unsigned const char *writebuf,
+ CORE_ADDR offset, int len);
+
+ int (*supports_non_stop) (void);
+
+ /* Enables async target events. Returns the previous enable
+ state. */
+ int (*async) (int enable);
+
+ /* Switch to non-stop (1) or all-stop (0) mode. Return 0 on
+ success, -1 otherwise. */
+ int (*start_non_stop) (int);
+
+ /* Returns true if the target supports multi-process debugging. */
+ int (*supports_multi_process) (void);
+
+ /* If not NULL, target-specific routine to process monitor command.
+ Returns 1 if handled, or 0 to perform default processing. */
+ int (*handle_monitor_command) (char *);
};
extern struct target_ops *the_target;
#define myattach(pid) \
(*the_target->attach) (pid)
-#define kill_inferior() \
- (*the_target->kill) ()
+#define kill_inferior(pid) \
+ (*the_target->kill) (pid)
-#define detach_inferior() \
- (*the_target->detach) ()
+#define detach_inferior(pid) \
+ (*the_target->detach) (pid)
#define mythread_alive(pid) \
(*the_target->thread_alive) (pid)
#define store_inferior_registers(regno) \
(*the_target->store_registers) (regno)
-#define join_inferior() \
- (*the_target->join) ()
+#define join_inferior(pid) \
+ (*the_target->join) (pid)
+
+#define target_supports_non_stop() \
+ (the_target->supports_non_stop ? (*the_target->supports_non_stop ) () : 0)
+
+#define target_async(enable) \
+ (the_target->async ? (*the_target->async) (enable) : 0)
+
+#define target_supports_multi_process() \
+ (the_target->supports_multi_process ? \
+ (*the_target->supports_multi_process) () : 0)
-unsigned char mywait (char *statusp, int connected_wait);
+/* Start non-stop mode, returns 0 on success, -1 on failure. */
+
+int start_non_stop (int nonstop);
+
+ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
+ int connected_wait);
int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
void set_desired_inferior (int id);
+const char *target_pid_to_str (ptid_t);
+
#endif /* TARGET_H */
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