Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 86 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/mach/thread_state.h b/REORG.TODO/sysdeps/mach/thread_state.h
new file mode 100644
index 0000000000..1a154cd0fa
--- /dev/null
+++ b/REORG.TODO/sysdeps/mach/thread_state.h
@@ -0,0 +1,86 @@
+/* Generic definitions for dealing with Mach thread states.
+   Copyright (C) 1994-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+
+/* Everything else is called `thread_state', but CMU's header file is
+   called `thread_status'.  Oh boy.  */
+#include <mach/thread_status.h>
+
+/* The machine-dependent thread_state.h file can either define these
+   macros, or just define PC and SP to the register names.  */
+
+#ifndef MACHINE_THREAD_STATE_SET_PC
+#define MACHINE_THREAD_STATE_SET_PC(ts, pc) \
+  ((ts)->PC = (unsigned long int) (pc))
+#endif
+#ifndef MACHINE_THREAD_STATE_SET_SP
+#ifdef STACK_GROWTH_UP
+#define MACHINE_THREAD_STATE_SET_SP(ts, stack, size) \
+  ((ts)->SP = (unsigned long int) (stack))
+#else
+#define MACHINE_THREAD_STATE_SET_SP(ts, stack, size) \
+  ((ts)->SP = (unsigned long int) (stack) + (size))
+#endif
+#endif
+
+/* These functions are of use in machine-dependent signal trampoline
+   implementations.  */
+
+#include <string.h>		/* size_t, memcpy */
+#include <mach/mach_interface.h> /* __thread_get_state */
+
+static inline int
+machine_get_state (thread_t thread, struct machine_thread_all_state *state,
+		   int flavor, void *stateptr, void *scpptr, size_t size)
+{
+  if (state->set & (1 << flavor))
+    {
+      /* Copy the saved state.  */
+      memcpy (scpptr, stateptr, size);
+      return 1;
+    }
+  else
+    {
+      /* No one asked about this flavor of state before; fetch the state
+	 directly from the kernel into the sigcontext.  */
+      mach_msg_type_number_t got = (size / sizeof (int));
+      return (! __thread_get_state (thread, flavor, scpptr, &got)
+	      && got == (size / sizeof (int)));
+    }
+}
+
+static inline int
+machine_get_basic_state (thread_t thread,
+			 struct machine_thread_all_state *state)
+{
+  mach_msg_type_number_t count;
+
+  if (state->set & (1 << MACHINE_THREAD_STATE_FLAVOR))
+    return 1;
+
+  count = MACHINE_THREAD_STATE_COUNT;
+  if (__thread_get_state (thread, MACHINE_THREAD_STATE_FLAVOR,
+			  (natural_t *) &state->basic,
+			  &count) != KERN_SUCCESS ||
+      count != MACHINE_THREAD_STATE_COUNT)
+    /* What kind of thread?? */
+    return 0;			/* XXX */
+
+  state->set |= 1 << MACHINE_THREAD_STATE_FLAVOR;
+  return 1;
+}