* corelow.c (get_core_registers): Adjust.

(core_file_thread_alive): Rename to...
	(core_thread_alive): ... this.
	(core_pid_to_str): Try gdbarch_core_pid_to_str first.
	(init_core_ops): Adjust.
	(coreops_suppress_target): Delete.
	(_initialize_corelow): Unconditionally add core_ops.
	* procfs.c: Include "inf-child.h".
	(procfs_ops): Delete.
	(init_procfs_ops): Delete.  Reimplement as...
	(procfs_target): ... this, inheriting from inf-child.
	(procfs_attach, procfs_detach, procfs_fetch_registers): Adjust.
	(procfs_prepare_to_store): Delete.
	(procfs_store_registers, procfs_resume): Adjust.
	(procfs_open): Delete.
	(procfs_suppress_run): Delete.
	(procfs_can_run): Delete.
	(procfs_mourn_inferior): Adjust.
	(procfs_init_inferior): Add target_ops parameter.  Adjust.
	(procfs_create_inferior): Don't pass procfs_init_inferior to
	fork_inferior.  Instead call it after fork_inferior returns.
	(procfs_find_new_threads): Adjust.
	(_initialize_procfs): Adjust to use procfs_target instead of
	init_procfs_ops.
	* sol-thread.c (orig_core_ops, sol_core_ops): Delete.
	(lwp_to_thread): Use target_thread_alive.
	(sol_thread_open): Delete.
	(sol_thread_attach): Delete.
	(sol_thread_detach, sol_thread_resume, sol_thread_wait)
	(sol_thread_fetch_registers, sol_thread_store_registers): Adjust
	to use find_target_beneath.
	(sol_thread_prepare_to_store, sol_thread_xfer_memory): Delete.
	(sol_thread_xfer_partial): Adjust to use find_target_beneath.
	(sol_thread_files_info, sol_thread_kill_inferior): Delete.
	(check_for_thread_db): New.
	(sol_thread_notice_signals, sol_thread_create_inferior): Delete.
	(sol_thread_new_objfile): Call check_for_thread_db.
	(sol_thread_mourn_inferior): Adjust to use find_target_beneath.
	(sol_thread_can_run): Delete.
	(sol_thread_alive): Adjust to use find_target_beneath.
	(sol_thread_stop): Delete.
	(rw_common): Use target_write_memory or target_read_memory.
	(ps_lgetregs, ps_lgetfpregs): Use target_fetch_registers.
	(ps_lsetregs, ps_lsetfpregs): Use target_store_registers.
	(solaris_pid_to_str): Remove check for libthread_db initialization
	failing.
	(sol_find_new_threads): Remove check for libthread_db
	initialization failing, or for an invalid inferior_ptid.  Adjust
	to use find_target_beneath.
	(sol_core_open, sol_core_close, sol_core_detach,
	sol_core_files_info, sol_find_memory_regions,
	sol_make_note_section, ignore): Delete.
	(init_sol_thread_ops): Make it a thread_stratum target.  Remove
	unneeded callback settings.
	(init_sol_core_ops): Delete.
	(_initialize_sol_thread): No longer call init_sol_core_ops, set
	procfs_suppress_run, or hack with core_ops.

	* target.h (struct target_ops): Add a target_ops * parameter to
	to_resume, to_fetch_registers, to_store_registers, to_thread_alive
	and to_find_new_threads.
	(target_fetch_registers, target_store_registers)
	(target_thread_alive, target_find_new_threads): Redeclare as
	function.

	* target.c (update_current_target): Do not inherit or de_fault
	to_resume, to_fetch_registers, to_store_registers,
	to_thread_alive, to_find_new_threads.
	(target_resume): Adjust.
	(target_thread_alive, target_find_new_threads): New.
	(debug_to_resume, debug_to_fetch_registers): Delete.
	(target_fetch_registers): New.
	(debug_to_store_registers): Delete.
	(target_store_registers): New.
	(debug_to_thread_alive, debug_to_find_new_threads): Delete.
	(setup_target_debug): Adjust.

	* gdbcore.h (core_ops): Delete declaration.

	* inf-ptrace.c, linux-nat.c, remote.c, amd64-linux-nat.c,
	inf-child.c, linux-thread-db.c, bsd-uthread.c, inf-ttrace.c,
	i386-sol2-tdep.c, darwin-nat.c, gnu-nat.c, go32-nat.c,
	hpux-thread.c, i386-linux-nat.c, i386fbsd-nat.c, monitor.c,
	nto-procfs.c, remote-m32r-sdi.c, remote-mips.c, windows-nat.c,
	alphabsd-nat.c, amd64bsd-nat.c, arm-linux-nat.c, armnbsd-nat.c,
	bsd-kvm.c, hppa-hpux-nat.c, hppa-linux-nat.c, hppabsd-nat.c,
	hppanbsd-nat.c, i386-darwin-nat.c, i386bsd-nat.c,
	ia64-linux-nat.c, m32r-linux-nat.c, m68kbsd-nat.c,
	m68klinux-nat.c, m88kbsd-nat.c, mips-linux-nat.c,
	mips64obsd-nat.c, mipsnbsd-nat.c, ppc-linux-nat.c, ppcnbsd-nat.c,
	ppcobsd-nat.c, remote-sim.c, rs6000-nat.c, s390-nat.c,
	shnbsd-nat.c, sparc-nat.c, sparc-nat.h, spu-linux-nat.c,
	vaxbsd-nat.c, xtensa-linux-nat.c: Adjust to target_ops changes.

	* gdbarch.sh (core_pid_to_str): New gdbarch callback.
	* gdbarch.h, gdbarch.c: Regenerate.

	* sol2-tdep.c: Include "inferior.h".
	(sol2_core_pid_to_str): New.
	* sol2-tdep.h (sol2_core_pid_to_str): Declare.

	* amd64-sol2-tdep.c (amd64_sol2_init_abi): Set it.
	* sparc-sol2-tdep.c (sparc32_sol2_init_abi): Set it.
	* sparc64-sol2-tdep.c (sparc64_sol2_init_abi): Set it.
	* i386-sol2-tdep.c (i386_sol2_init_abi): Set it.

gdb/inf-ttrace.c

@@ -39,8 +39,6 @@
 #include "inf-child.h"
 #include "inf-ttrace.h"
 
-/* HACK: Save the ttrace ops returned by inf_ttrace_target.  */
-static struct target_ops *ttrace_ops_hack;
 
 
 /* HP-UX uses a threading model where each user-space thread
@@ -618,7 +616,7 @@ inf_ttrace_me (void)
 /* Start tracing PID.  */
 
 static void
-inf_ttrace_him (int pid)
+inf_ttrace_him (struct target_ops *ops, int pid)
 {
   struct cleanup *old_chain = make_cleanup (do_cleanup_pfds, 0);
   ttevent_t tte;
@@ -646,7 +644,7 @@ inf_ttrace_him (int pid)
 
   do_cleanups (old_chain);
 
-  push_target (ttrace_ops_hack);
+  push_target (ops);
 
   /* On some targets, there must be some explicit synchronization
      between the parent and child processes after the debugger forks,
@@ -669,14 +667,18 @@ static void
 inf_ttrace_create_inferior (struct target_ops *ops, char *exec_file, 
 			    char *allargs, char **env, int from_tty)
 {
+  int pid;
+
   gdb_assert (inf_ttrace_num_lwps == 0);
   gdb_assert (inf_ttrace_num_lwps_in_syscall == 0);
   gdb_assert (inf_ttrace_page_dict.count == 0);
   gdb_assert (inf_ttrace_reenable_page_protections == 0);
   gdb_assert (inf_ttrace_vfork_ppid == -1);
 
-  fork_inferior (exec_file, allargs, env, inf_ttrace_me, inf_ttrace_him,
-		 inf_ttrace_prepare, NULL);
+  pid = fork_inferior (exec_file, allargs, env, inf_ttrace_me, NULL,
+		       inf_ttrace_prepare, NULL);
+
+  inf_ttrace_him (ops, pid);
 }
 
 static void
@@ -703,7 +705,7 @@ inf_ttrace_mourn_inferior (struct target_ops *ops)
     }
   inf_ttrace_page_dict.count = 0;
 
-  unpush_target (ttrace_ops_hack);
+  unpush_target (ops);
   generic_mourn_inferior ();
 }
 
@@ -763,7 +765,7 @@ inf_ttrace_attach (struct target_ops *ops, char *args, int from_tty)
 	      (uintptr_t)&tte, sizeof tte, 0) == -1)
     perror_with_name (("ttrace"));
 
-  push_target (ttrace_ops_hack);
+  push_target (ops);
 
   /* We'll bump inf_ttrace_num_lwps up and add the private data to the
      thread as soon as we get to inf_ttrace_wait.  At this point, we
@@ -808,7 +810,7 @@ inf_ttrace_detach (struct target_ops *ops, char *args, int from_tty)
   inferior_ptid = null_ptid;
   detach_inferior (pid);
 
-  unpush_target (ttrace_ops_hack);
+  unpush_target (ops);
 }
 
 static void
@@ -891,7 +893,8 @@ inf_ttrace_resume_callback (struct thread_info *info, void *arg)
 }
 
 static void
-inf_ttrace_resume (ptid_t ptid, int step, enum target_signal signal)
+inf_ttrace_resume (struct target_ops *ops,
+		   ptid_t ptid, int step, enum target_signal signal)
 {
   int resume_all;
   ttreq_t request = step ? TT_LWP_SINGLE : TT_LWP_CONTINUE;
@@ -1232,7 +1235,7 @@ inf_ttrace_files_info (struct target_ops *ignore)
 }
 
 static int
-inf_ttrace_thread_alive (ptid_t ptid)
+inf_ttrace_thread_alive (struct target_ops *ops, ptid_t ptid)
 {
   return 1;
 }
@@ -1294,7 +1297,6 @@ inf_ttrace_target (void)
   t->to_pid_to_str = inf_ttrace_pid_to_str;
   t->to_xfer_partial = inf_ttrace_xfer_partial;
 
-  ttrace_ops_hack = t;
   return t;
 }
 #endif