initial import

1 files changed, 87 insertions, 0 deletions

diff --git a/sysdeps/mach/thread_state.h b/sysdeps/mach/thread_state.h
new file mode 100644
index 0000000000..06f168bb55
--- /dev/null
+++ b/sysdeps/mach/thread_state.h
@@ -0,0 +1,87 @@
+/* Generic definitions for dealing with Mach thread states.
+Copyright (C) 1994 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+
+/* 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
+    {
+      /* Noone 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;
+}