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1/* Generic definitions for dealing with Mach thread states.
2 Copyright (C) 1994-2019 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19
20/* Everything else is called `thread_state', but CMU's header file is
21 called `thread_status'. Oh boy. */
22#include <mach/thread_status.h>
23
24/* The machine-dependent thread_state.h file can either define these
25 macros, or just define PC and SP to the register names. */
26
27#ifndef MACHINE_THREAD_STATE_SET_PC
28#define MACHINE_THREAD_STATE_SET_PC(ts, pc) \
29 ((ts)->PC = (unsigned long int) (pc))
30#endif
31#ifndef MACHINE_THREAD_STATE_SET_SP
32#ifdef STACK_GROWTH_UP
33#define MACHINE_THREAD_STATE_SET_SP(ts, stack, size) \
34 ((ts)->SP = (unsigned long int) (stack))
35#else
36#define MACHINE_THREAD_STATE_SET_SP(ts, stack, size) \
37 ((ts)->SP = (unsigned long int) (stack) + (size))
38#endif
39#endif
40
41/* This copies architecture-specific bits from the current thread to the new
42 thread state. */
43#ifndef MACHINE_THREAD_STATE_FIX_NEW
44# define MACHINE_THREAD_STATE_FIX_NEW(ts)
45#endif
46
47/* These functions are of use in machine-dependent signal trampoline
48 implementations. */
49
50#include <string.h> /* size_t, memcpy */
51#include <mach/mach_interface.h> /* __thread_get_state */
52
53static inline int
54machine_get_state (thread_t thread, struct machine_thread_all_state *state,
55 int flavor, void *stateptr, void *scpptr, size_t size)
56{
57 if (state->set & (1 << flavor))
58 {
59 /* Copy the saved state. */
60 memcpy (scpptr, stateptr, size);
61 return 1;
62 }
63 else
64 {
65 /* No one asked about this flavor of state before; fetch the state
66 directly from the kernel into the sigcontext. */
67 mach_msg_type_number_t got = (size / sizeof (int));
68 return (! __thread_get_state (thread, flavor, scpptr, &got)
69 && got == (size / sizeof (int)));
70 }
71}
72
73static inline int
74machine_get_basic_state (thread_t thread,
75 struct machine_thread_all_state *state)
76{
77 mach_msg_type_number_t count;
78
79 if (state->set & (1 << MACHINE_THREAD_STATE_FLAVOR))
80 return 1;
81
82 count = MACHINE_THREAD_STATE_COUNT;
83 if (__thread_get_state (thread, MACHINE_THREAD_STATE_FLAVOR,
84 (natural_t *) &state->basic,
85 &count) != KERN_SUCCESS
86 || count != MACHINE_THREAD_STATE_COUNT)
87 /* What kind of thread?? */
88 return 0; /* XXX */
89
90 state->set |= 1 << MACHINE_THREAD_STATE_FLAVOR;
91 return 1;
92}
93

Warning: That file was not part of the compilation database. It may have many parsing errors.