/* Target operations for the remote server for GDB.
- Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008, 2009
- Free Software Foundation, Inc.
+ Copyright (C) 2002-2013 Free Software Foundation, Inc.
Contributed by MontaVista Software.
#ifndef TARGET_H
#define TARGET_H
-/* Ways to "resume" a thread. */
+#include "target/resume.h"
+#include "target/wait.h"
+#include "target/waitstatus.h"
-enum resume_kind
-{
- /* Thread should continue. */
- resume_continue,
-
- /* Thread should single-step. */
- resume_step,
-
- /* Thread should be stopped. */
- resume_stop
-};
+struct emit_ops;
+struct btrace_target_info;
+struct buffer;
/* This structure describes how to resume a particular thread (or all
threads) based on the client's request. If thread is -1, then this
/* 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 gdb_signal). */
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
+ /* Range to single step within. Valid only iff KIND is resume_step.
+
+ Single-step once, and then continuing stepping as long as the
+ thread stops in this range. (If the range is empty
+ [STEP_RANGE_START == STEP_RANGE_END], then this is a single-step
+ request.) */
+ CORE_ADDR step_range_start; /* Inclusive */
+ CORE_ADDR step_range_end; /* Exclusive */
+};
struct target_ops
{
int (*detach) (int pid);
+ /* The inferior process has died. Do what is right. */
+
+ void (*mourn) (struct process_info *proc);
+
/* Wait for inferior PID to exit. */
void (*join) (int pid);
If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO. */
- void (*fetch_registers) (int regno);
+ void (*fetch_registers) (struct regcache *regcache, int regno);
/* Store registers to the inferior process.
If REGNO is -1, store all registers; otherwise, store at least REGNO. */
- void (*store_registers) (int regno);
+ 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.
/* 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 *);
+
+ /* Returns the core given a thread, or -1 if not known. */
+ int (*core_of_thread) (ptid_t);
+
+ /* Read loadmaps. Read LEN bytes at OFFSET into a buffer at MYADDR. */
+ int (*read_loadmap) (const char *annex, CORE_ADDR offset,
+ unsigned char *myaddr, unsigned int len);
+
+ /* Target specific qSupported support. */
+ void (*process_qsupported) (const char *);
+
+ /* Return 1 if the target supports tracepoints, 0 (or leave the
+ callback NULL) otherwise. */
+ int (*supports_tracepoints) (void);
+
+ /* Read PC from REGCACHE. */
+ CORE_ADDR (*read_pc) (struct regcache *regcache);
+
+ /* Write PC to REGCACHE. */
+ void (*write_pc) (struct regcache *regcache, CORE_ADDR pc);
+
+ /* Return true if THREAD is known to be stopped now. */
+ int (*thread_stopped) (struct thread_info *thread);
+
+ /* Read Thread Information Block address. */
+ int (*get_tib_address) (ptid_t ptid, CORE_ADDR *address);
+
+ /* Pause all threads. If FREEZE, arrange for any resume attempt to
+ be ignored until an unpause_all call unfreezes threads again.
+ There can be nested calls to pause_all, so a freeze counter
+ should be maintained. */
+ void (*pause_all) (int freeze);
+
+ /* Unpause all threads. Threads that hadn't been resumed by the
+ client should be left stopped. Basically a pause/unpause call
+ pair should not end up resuming threads that were stopped before
+ the pause call. */
+ void (*unpause_all) (int unfreeze);
+
+ /* Cancel all pending breakpoints hits in all threads. */
+ void (*cancel_breakpoints) (void);
+
+ /* Stabilize all threads. That is, force them out of jump pads. */
+ void (*stabilize_threads) (void);
+
+ /* Install a fast tracepoint jump pad. TPOINT is the address of the
+ tracepoint internal object as used by the IPA agent. TPADDR is
+ the address of tracepoint. COLLECTOR is address of the function
+ the jump pad redirects to. LOCKADDR is the address of the jump
+ pad lock object. ORIG_SIZE is the size in bytes of the
+ instruction at TPADDR. JUMP_ENTRY points to the address of the
+ jump pad entry, and on return holds the address past the end of
+ the created jump pad. If a trampoline is created by the function,
+ then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
+ the trampoline, else they remain unchanged. JJUMP_PAD_INSN is a
+ buffer containing a copy of the instruction at TPADDR.
+ ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
+ return the address range where the instruction at TPADDR was relocated
+ to. If an error occurs, the ERR may be used to pass on an error
+ message. */
+ int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
+ CORE_ADDR collector,
+ CORE_ADDR lockaddr,
+ ULONGEST orig_size,
+ CORE_ADDR *jump_entry,
+ CORE_ADDR *trampoline,
+ ULONGEST *trampoline_size,
+ unsigned char *jjump_pad_insn,
+ ULONGEST *jjump_pad_insn_size,
+ CORE_ADDR *adjusted_insn_addr,
+ CORE_ADDR *adjusted_insn_addr_end,
+ char *err);
+
+ /* Return the bytecode operations vector for the current inferior.
+ Returns NULL if bytecode compilation is not supported. */
+ struct emit_ops *(*emit_ops) (void);
+
+ /* Returns true if the target supports disabling randomization. */
+ int (*supports_disable_randomization) (void);
+
+ /* Return the minimum length of an instruction that can be safely overwritten
+ for use as a fast tracepoint. */
+ int (*get_min_fast_tracepoint_insn_len) (void);
+
+ /* Read solib info on SVR4 platforms. */
+ int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
+ unsigned const char *writebuf,
+ CORE_ADDR offset, int len);
+
+ /* Return true if target supports debugging agent. */
+ int (*supports_agent) (void);
+
+ /* Check whether the target supports branch tracing. */
+ int (*supports_btrace) (void);
+
+ /* Enable branch tracing for @ptid and allocate a branch trace target
+ information struct for reading and for disabling branch trace. */
+ struct btrace_target_info *(*enable_btrace) (ptid_t ptid);
+
+ /* Disable branch tracing. */
+ int (*disable_btrace) (struct btrace_target_info *tinfo);
+
+ /* Read branch trace data into buffer. We use an int to specify the type
+ to break a cyclic dependency. */
+ void (*read_btrace) (struct btrace_target_info *, struct buffer *, int type);
+
+ /* Return true if target supports range stepping. */
+ int (*supports_range_stepping) (void);
};
extern struct target_ops *the_target;
#define myattach(pid) \
(*the_target->attach) (pid)
-#define kill_inferior(pid) \
- (*the_target->kill) (pid)
+int kill_inferior (int);
#define detach_inferior(pid) \
(*the_target->detach) (pid)
+#define mourn_inferior(PROC) \
+ (*the_target->mourn) (PROC)
+
#define mythread_alive(pid) \
(*the_target->thread_alive) (pid)
-#define fetch_inferior_registers(regno) \
- (*the_target->fetch_registers) (regno)
+#define fetch_inferior_registers(regcache, regno) \
+ (*the_target->fetch_registers) (regcache, regno)
-#define store_inferior_registers(regno) \
- (*the_target->store_registers) (regno)
+#define store_inferior_registers(regcache, regno) \
+ (*the_target->store_registers) (regcache, regno)
#define join_inferior(pid) \
(*the_target->join) (pid)
(the_target->supports_multi_process ? \
(*the_target->supports_multi_process) () : 0)
+#define target_process_qsupported(query) \
+ do \
+ { \
+ if (the_target->process_qsupported) \
+ the_target->process_qsupported (query); \
+ } while (0)
+
+#define target_supports_tracepoints() \
+ (the_target->supports_tracepoints \
+ ? (*the_target->supports_tracepoints) () : 0)
+
+#define target_supports_fast_tracepoints() \
+ (the_target->install_fast_tracepoint_jump_pad != NULL)
+
+#define target_get_min_fast_tracepoint_insn_len() \
+ (the_target->get_min_fast_tracepoint_insn_len \
+ ? (*the_target->get_min_fast_tracepoint_insn_len) () : 0)
+
+#define thread_stopped(thread) \
+ (*the_target->thread_stopped) (thread)
+
+#define pause_all(freeze) \
+ do \
+ { \
+ if (the_target->pause_all) \
+ (*the_target->pause_all) (freeze); \
+ } while (0)
+
+#define unpause_all(unfreeze) \
+ do \
+ { \
+ if (the_target->unpause_all) \
+ (*the_target->unpause_all) (unfreeze); \
+ } while (0)
+
+#define cancel_breakpoints() \
+ do \
+ { \
+ if (the_target->cancel_breakpoints) \
+ (*the_target->cancel_breakpoints) (); \
+ } while (0)
+
+#define stabilize_threads() \
+ do \
+ { \
+ if (the_target->stabilize_threads) \
+ (*the_target->stabilize_threads) (); \
+ } while (0)
+
+#define 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->emit_ops ? (*the_target->emit_ops) () : NULL)
+
+#define target_supports_disable_randomization() \
+ (the_target->supports_disable_randomization ? \
+ (*the_target->supports_disable_randomization) () : 0)
+
+#define target_supports_agent() \
+ (the_target->supports_agent ? \
+ (*the_target->supports_agent) () : 0)
+
+#define target_supports_btrace() \
+ (the_target->supports_btrace ? (*the_target->supports_btrace) () : 0)
+
+#define target_enable_btrace(ptid) \
+ (*the_target->enable_btrace) (ptid)
+
+#define target_disable_btrace(tinfo) \
+ (*the_target->disable_btrace) (tinfo)
+
+#define target_read_btrace(tinfo, buffer, type) \
+ (*the_target->read_btrace) (tinfo, buffer, type)
+
+#define target_supports_range_stepping() \
+ (the_target->supports_range_stepping ? \
+ (*the_target->supports_range_stepping) () : 0)
+
/* 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);
+#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)
+
+#define target_core_of_thread(ptid) \
+ (the_target->core_of_thread ? (*the_target->core_of_thread) (ptid) \
+ : -1)
+
int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
int write_inferior_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
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