/* Native debugging support for GNU/Linux (LWP layer).
- Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+
+ Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
+ 2010 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include "target.h"
-/* Structure describing an LWP. */
+#include <signal.h>
+
+/* Structure describing an LWP. This is public only for the purposes
+ of ALL_LWPS; target-specific code should generally not access it
+ directly. */
struct lwp_info
{
/* Non-zero if we were stepping this LWP. */
int step;
+ /* Non-zero si_signo if this LWP stopped with a trap. si_addr may
+ be the address of a hardware watchpoint. */
+ struct siginfo siginfo;
+
+ /* STOPPED_BY_WATCHPOINT is non-zero if this LWP stopped with a data
+ watchpoint trap. */
+ int stopped_by_watchpoint;
+
+ /* On architectures where it is possible to know the data address of
+ a triggered watchpoint, STOPPED_DATA_ADDRESS_P is non-zero, and
+ STOPPED_DATA_ADDRESS contains such data address. Otherwise,
+ STOPPED_DATA_ADDRESS_P is false, and STOPPED_DATA_ADDRESS is
+ undefined. Only valid if STOPPED_BY_WATCHPOINT is true. */
+ int stopped_data_address_p;
+ CORE_ADDR stopped_data_address;
+
+ /* Non-zero if we expect a duplicated SIGINT. */
+ int ignore_sigint;
+
+ /* If WAITSTATUS->KIND != TARGET_WAITKIND_SPURIOUS, the waitstatus
+ for this LWP's last event. This may correspond to STATUS above,
+ or to a local variable in lin_lwp_wait. */
+ struct target_waitstatus waitstatus;
+
+ /* Signal wether we are in a SYSCALL_ENTRY or
+ in a SYSCALL_RETURN event.
+ Values:
+ - TARGET_WAITKIND_SYSCALL_ENTRY
+ - TARGET_WAITKIND_SYSCALL_RETURN */
+ int syscall_state;
+
+ /* The processor core this LWP was last seen on. */
+ int core;
+
/* Next LWP in list. */
struct lwp_info *next;
};
-/* Read/write to target memory via Linux's "proc file system". */
-struct mem_attrib;
-extern int linux_proc_xfer_memory (CORE_ADDR addr, char *myaddr, int len,
- int write, struct mem_attrib *attrib,
- struct target_ops *target);
+/* The global list of LWPs, for ALL_LWPS. Unlike the threads list,
+ there is always at least one LWP on the list while the GNU/Linux
+ native target is active. */
+extern struct lwp_info *lwp_list;
+
+/* Iterate over the PTID each active thread (light-weight process). There
+ must be at least one. */
+#define ALL_LWPS(LP, PTID) \
+ for ((LP) = lwp_list, (PTID) = (LP)->ptid; \
+ (LP) != NULL; \
+ (LP) = (LP)->next, (PTID) = (LP) ? (LP)->ptid : (PTID))
+
+#define GET_LWP(ptid) ptid_get_lwp (ptid)
+#define GET_PID(ptid) ptid_get_pid (ptid)
+#define is_lwp(ptid) (GET_LWP (ptid) != 0)
+#define BUILD_LWP(lwp, pid) ptid_build (pid, lwp, 0)
+
+/* Attempt to initialize libthread_db. */
+void check_for_thread_db (void);
-extern void linux_record_stopped_pid (int pid);
+int thread_db_attach_lwp (ptid_t ptid);
+
+/* Find process PID's pending signal set from /proc/pid/status. */
+void linux_proc_pending_signals (int pid, sigset_t *pending, sigset_t *blocked, sigset_t *ignored);
+
+/* Return the TGID of LWPID from /proc/pid/status. Returns -1 if not
+ found. */
+extern int linux_proc_get_tgid (int lwpid);
+
+/* linux-nat functions for handling fork events. */
+extern void linux_enable_event_reporting (ptid_t ptid);
+
+extern int lin_lwp_attach_lwp (ptid_t ptid);
/* Iterator function for lin-lwp's lwp list. */
-struct lwp_info *iterate_over_lwps (int (*callback) (struct lwp_info *,
+struct lwp_info *iterate_over_lwps (ptid_t filter,
+ int (*callback) (struct lwp_info *,
void *),
void *data);
+
+/* 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 (*) (ptid_t));
+
+/* 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 (*) (struct siginfo *,
+ gdb_byte *,
+ int));
+
+/* Update linux-nat internal state when changing from one fork
+ to another. */
+void linux_nat_switch_fork (ptid_t new_ptid);
+
+/* Return the saved siginfo associated with PTID. */
+struct siginfo *linux_nat_get_siginfo (ptid_t ptid);
+
+/* Compute and return the processor core of a given thread. */
+int linux_nat_core_of_thread_1 (ptid_t ptid);
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