linux_nat_target: More low methods

This converts the remaining linux-nat.c hooks low_ methods like had
been started in a previous patch.  The linux_nat_set_foo routines are
all gone with this.

gdb/ChangeLog:
2018-05-02  Pedro Alves  <palves@redhat.com>

	* linux-nat.h (linux_nat_target) <low_new_thread,
	low_delete_thread, low_new_fork, low_forget_process,
	low_prepare_to_resume, low_siginfo_fixup, low_status_is_event>:
	New virtual methods.
	(linux_nat_set_new_thread, linux_nat_set_delete_thread)
	(linux_nat_new_fork_ftype, linux_nat_set_new_fork)
	(linux_nat_forget_process_ftype, linux_nat_set_forget_process)
	(linux_nat_forget_process, linux_nat_set_siginfo_fixup)
	(linux_nat_set_prepare_to_resume, linux_nat_set_status_is_event):
	Delete.
	* linux-fork.c (delete_fork): Adjust to call low method.
	* linux-nat.c (linux_nat_new_thread, linux_nat_delete_thread)
	(linux_nat_new_fork, linux_nat_forget_process_hook)
	(linux_nat_prepare_to_resume, linux_nat_siginfo_fixup)
	(linux_nat_status_is_event):
	(linux_nat_target::follow_fork, lwp_free, add_lwp, detach_one_lwp)
	(linux_resume_one_lwp_throw, linux_handle_extended_wait): Adjust
	to call low method.
	(sigtrap_is_event): Rename to ...
	(linux_nat_target::low_status_is_event): ... this.
	(linux_nat_set_status_is_event): Delete.
	(save_stop_reason, linux_nat_wait_1)
	(linux_nat_target::mourn_inferior, siginfo_fixup): Adjust to call
	low methods.
	(linux_nat_set_new_thread, linux_nat_set_delete_thread)
	(linux_nat_set_new_fork, linux_nat_set_forget_process)
	(linux_nat_forget_process, linux_nat_set_siginfo_fixup)
	(linux_nat_set_prepare_to_resume): Delete.
	* aarch64-linux-nat.c: All linux_nat_set_* callbacks converted to
	low virtual methods.
	* amd64-linux-nat.c: Likewise.
	* arm-linux-nat.c: Likewise.
	* i386-linux-nat.c: Likewise.
	* ia64-linux-nat.c: Likewise.
	* mips-linux-nat.c: Likewise.
	* ppc-linux-nat.c: Likewise.
	* s390-linux-nat.c: Likewise.
	* sparc64-linux-nat.c: Likewise.
	* x86-linux-nat.c: Likewise.
	* x86-linux-nat.h: Include "nat/x86-linux.h".
	(x86_linux_nat_target) <low_new_fork, low_forget_process,
	low_prepare_to_resume, low_new_thread, low_delete_thread>:
	Override methods.

1 files changed, 13 insertions, 11 deletions

diff --git a/gdb/amd64-linux-nat.c b/gdb/amd64-linux-nat.c
index cee3644..9177c3e 100644
--- a/gdb/amd64-linux-nat.c
+++ b/gdb/amd64-linux-nat.c
@@ -50,6 +50,9 @@ struct amd64_linux_nat_target final : public x86_linux_nat_target
   /* Add our register access methods.  */
   void fetch_registers (struct regcache *, int) override;
   void store_registers (struct regcache *, int) override;
+
+  bool low_siginfo_fixup (siginfo_t *ptrace, gdb_byte *inf, int direction)
+    override;
 };
 
 static amd64_linux_nat_target the_amd64_linux_nat_target;
@@ -384,22 +387,24 @@ ps_get_thread_area (struct ps_prochandle *ph,
    from INF to PTRACE.  If DIRECTION is 0, copy from PTRACE to
    INF.  */
 
-static int
-amd64_linux_siginfo_fixup (siginfo_t *ptrace, gdb_byte *inf, int direction)
+bool
+amd64_linux_nat_target::low_siginfo_fixup (siginfo_t *ptrace,
+					   gdb_byte *inf,
+					   int direction)
 {
   struct gdbarch *gdbarch = get_frame_arch (get_current_frame ());
 
   /* Is the inferior 32-bit?  If so, then do fixup the siginfo
      object.  */
   if (gdbarch_bfd_arch_info (gdbarch)->bits_per_word == 32)
-      return amd64_linux_siginfo_fixup_common (ptrace, inf, direction,
-					       FIXUP_32);
+    return amd64_linux_siginfo_fixup_common (ptrace, inf, direction,
+					     FIXUP_32);
   /* No fixup for native x32 GDB.  */
   else if (gdbarch_addr_bit (gdbarch) == 32 && sizeof (void *) == 8)
-      return amd64_linux_siginfo_fixup_common (ptrace, inf, direction,
-					       FIXUP_X32);
+    return amd64_linux_siginfo_fixup_common (ptrace, inf, direction,
+					     FIXUP_X32);
   else
-    return 0;
+    return false;
 }
 
 void
@@ -416,8 +421,5 @@ _initialize_amd64_linux_nat (void)
   linux_target = &the_amd64_linux_nat_target;
 
   /* Add the target.  */
-  x86_linux_add_target (linux_target);
-
-  /* Add our siginfo layout converter.  */
-  linux_nat_set_siginfo_fixup (linux_target, amd64_linux_siginfo_fixup);
+  add_target (linux_target);
 }