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- /* 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. */
- unsigned int 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)
- {
- unsigned int 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,
- (int *) &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;
- }
-