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