#ifndef TARGET_H
#define TARGET_H
+struct emit_ops;
+
/* Ways to "resume" a thread. */
enum resume_kind
/* 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;
};
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.
/* Return true if THREAD is known to be stopped now. */
int (*thread_stopped) (struct thread_info *thread);
- /* Pause all threads. */
- void (*pause_all) (void);
-
/* 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 be
+ 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. 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. */
+ 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,
+ unsigned char *jjump_pad_insn,
+ ULONGEST *jjump_pad_insn_size,
+ CORE_ADDR *adjusted_insn_addr,
+ CORE_ADDR *adjusted_insn_addr_end);
+
+ /* Return the bytecode operations vector for the current inferior.
+ Returns NULL if bytecode compilation is not supported. */
+ struct emit_ops *(*emit_ops) (void);
};
extern struct target_ops *the_target;
(the_target->supports_tracepoints \
? (*the_target->supports_tracepoints) () : 0)
+#define target_supports_fast_tracepoints() \
+ (the_target->install_fast_tracepoint_jump_pad != NULL)
+
#define thread_stopped(thread) \
(*the_target->thread_stopped) (thread)
-#define pause_all() \
- do \
- { \
- if (the_target->pause_all) \
- (*the_target->pause_all) (); \
+#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, jjump_pad_insn, \
+ jjump_pad_insn_size, \
+ adjusted_insn_addr, \
+ adjusted_insn_addr_end) \
+ (*the_target->install_fast_tracepoint_jump_pad) (tpoint, tpaddr, \
+ collector,lockaddr, \
+ orig_size, jump_entry, \
+ jjump_pad_insn, \
+ jjump_pad_insn_size, \
+ adjusted_insn_addr, \
+ adjusted_insn_addr_end)
+
+#define target_emit_ops() \
+ (the_target->emit_ops ? (*the_target->emit_ops) () : NULL)
+
/* 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)
+
int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
int write_inferior_memory (CORE_ADDR memaddr, const unsigned char *myaddr,