/* Native debugging support for GNU/Linux (LWP layer).
- Copyright (C) 2000-2018 Free Software Foundation, Inc.
+ Copyright (C) 2000-2020 Free Software Foundation, Inc.
This file is part of GDB.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
+#ifndef LINUX_NAT_H
+#define LINUX_NAT_H
+
#include "nat/linux-nat.h"
+#include "inf-ptrace.h"
#include "target.h"
#include <signal.h>
+/* A prototype generic GNU/Linux target. A concrete instance should
+ override it with local methods. */
+
+class linux_nat_target : public inf_ptrace_target
+{
+public:
+ linux_nat_target ();
+ ~linux_nat_target () override = 0;
+
+ thread_control_capabilities get_thread_control_capabilities () override
+ { return tc_schedlock; }
+
+ void create_inferior (const char *, const std::string &,
+ char **, int) override;
+
+ void attach (const char *, int) override;
+
+ void detach (inferior *, int) override;
+
+ void resume (ptid_t, int, enum gdb_signal) override;
+
+ ptid_t wait (ptid_t, struct target_waitstatus *, int) override;
+
+ void pass_signals (gdb::array_view<const unsigned char>) override;
+
+ enum target_xfer_status xfer_partial (enum target_object object,
+ const char *annex,
+ gdb_byte *readbuf,
+ const gdb_byte *writebuf,
+ ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len) override;
+
+ void kill () override;
+
+ void mourn_inferior () override;
+ bool thread_alive (ptid_t ptid) override;
+
+ void update_thread_list () override;
+
+ std::string pid_to_str (ptid_t) override;
+
+ const char *thread_name (struct thread_info *) override;
+
+ struct address_space *thread_address_space (ptid_t) override;
+
+ bool stopped_by_watchpoint () override;
+
+ bool stopped_data_address (CORE_ADDR *) override;
+
+ bool stopped_by_sw_breakpoint () override;
+ bool supports_stopped_by_sw_breakpoint () override;
+
+ bool stopped_by_hw_breakpoint () override;
+ bool supports_stopped_by_hw_breakpoint () override;
+
+ void thread_events (int) override;
+
+ bool can_async_p () override;
+ bool is_async_p () override;
+
+ bool supports_non_stop () override;
+ bool always_non_stop_p () override;
+
+ int async_wait_fd () override;
+ void async (int) override;
+
+ void close () override;
+
+ void stop (ptid_t) override;
+
+ bool supports_multi_process () override;
+
+ bool supports_disable_randomization () override;
+
+ int core_of_thread (ptid_t ptid) override;
+
+ bool filesystem_is_local () override;
+
+ int fileio_open (struct inferior *inf, const char *filename,
+ int flags, int mode, int warn_if_slow,
+ int *target_errno) override;
+
+ gdb::optional<std::string>
+ fileio_readlink (struct inferior *inf,
+ const char *filename,
+ int *target_errno) override;
+
+ int fileio_unlink (struct inferior *inf,
+ const char *filename,
+ int *target_errno) override;
+
+ int insert_fork_catchpoint (int) override;
+ int remove_fork_catchpoint (int) override;
+ int insert_vfork_catchpoint (int) override;
+ int remove_vfork_catchpoint (int) override;
+
+ int insert_exec_catchpoint (int) override;
+ int remove_exec_catchpoint (int) override;
+
+ int set_syscall_catchpoint (int pid, bool needed, int any_count,
+ gdb::array_view<const int> syscall_counts) override;
+
+ char *pid_to_exec_file (int pid) override;
+
+ void post_startup_inferior (ptid_t) override;
+
+ void post_attach (int) override;
+
+ int follow_fork (int, int) override;
+
+ std::vector<static_tracepoint_marker>
+ static_tracepoint_markers_by_strid (const char *id) override;
+
+ /* Methods that are meant to overridden by the concrete
+ arch-specific target instance. */
+
+ virtual void low_resume (ptid_t ptid, int step, enum gdb_signal sig)
+ { inf_ptrace_target::resume (ptid, step, sig); }
+
+ virtual bool low_stopped_by_watchpoint ()
+ { return false; }
+
+ virtual bool low_stopped_data_address (CORE_ADDR *addr_p)
+ { return false; }
+
+ /* The method to call, if any, when a new thread is attached. */
+ virtual void low_new_thread (struct lwp_info *)
+ {}
+
+ /* The method to call, if any, when a thread is destroyed. */
+ virtual void low_delete_thread (struct arch_lwp_info *lp)
+ {
+ gdb_assert (lp == NULL);
+ }
+
+ /* The method to call, if any, when a new fork is attached. */
+ virtual void low_new_fork (struct lwp_info *parent, pid_t child_pid)
+ {}
+
+ /* The method to call, if any, when a process is no longer
+ attached. */
+ virtual void low_forget_process (pid_t pid)
+ {}
+
+ /* Hook to call prior to resuming a thread. */
+ virtual void low_prepare_to_resume (struct lwp_info *)
+ {}
+
+ /* Convert a ptrace/host siginfo object, into/from the siginfo in
+ the layout of the inferiors' architecture. Returns true if any
+ conversion was done; false otherwise, in which case the caller
+ does a straight memcpy. If DIRECTION is 1, then copy from INF to
+ PTRACE. If DIRECTION is 0, copy from PTRACE to INF. */
+ virtual bool low_siginfo_fixup (siginfo_t *ptrace, gdb_byte *inf,
+ int direction)
+ { return false; }
+
+ /* SIGTRAP-like breakpoint status events recognizer. The default
+ recognizes SIGTRAP only. */
+ virtual bool low_status_is_event (int status);
+};
+
+/* The final/concrete instance. */
+extern linux_nat_target *linux_target;
+
struct arch_lwp_info;
/* Structure describing an LWP. This is public only for the purposes
left stopped.) */
extern void linux_unstop_all_lwps (void);
-/* Create a prototype generic GNU/Linux target. The client can
- override it with local methods. */
-struct target_ops * linux_target (void);
-
-/* Create a generic GNU/Linux target using traditional
- ptrace register access. */
-struct target_ops *
-linux_trad_target (CORE_ADDR (*register_u_offset)(struct gdbarch *, int, int));
-
-/* Register the customized GNU/Linux target. This should be used
- instead of calling add_target directly. */
-void linux_nat_add_target (struct target_ops *);
-
-/* Register a method to call whenever a new thread is attached. */
-void linux_nat_set_new_thread (struct target_ops *, void (*) (struct lwp_info *));
-
-/* Register a method to call whenever a new thread is deleted. */
-void linux_nat_set_delete_thread (struct target_ops *,
- void (*) (struct arch_lwp_info *));
-
-/* Register a method to call whenever a new fork is attached. */
-typedef void (linux_nat_new_fork_ftype) (struct lwp_info *parent,
- pid_t child_pid);
-void linux_nat_set_new_fork (struct target_ops *ops,
- linux_nat_new_fork_ftype *fn);
-
-/* Register a method to call whenever a process is killed or
- detached. */
-typedef void (linux_nat_forget_process_ftype) (pid_t pid);
-void linux_nat_set_forget_process (struct target_ops *ops,
- linux_nat_forget_process_ftype *fn);
-
-/* Call the method registered with the function above. PID is the
- process to forget about. */
-void linux_nat_forget_process (pid_t pid);
-
-/* Register a method that converts a siginfo object between the layout
- that ptrace returns, and the layout in the architecture of the
- inferior. */
-void linux_nat_set_siginfo_fixup (struct target_ops *,
- int (*) (siginfo_t *,
- gdb_byte *,
- int));
-
-/* Register a method to call prior to resuming a thread. */
-
-void linux_nat_set_prepare_to_resume (struct target_ops *,
- void (*) (struct lwp_info *));
-
/* Update linux-nat internal state when changing from one fork
to another. */
void linux_nat_switch_fork (ptid_t new_ptid);
uninitialized in such case). */
int linux_nat_get_siginfo (ptid_t ptid, siginfo_t *siginfo);
-/* Set alternative SIGTRAP-like events recognizer. */
-void linux_nat_set_status_is_event (struct target_ops *t,
- int (*status_is_event) (int status));
+#endif /* LINUX_NAT_H */
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