Update.
[glibc.git] / sysdeps / mach / thread_state.h
blob34904aa550e7610089f56ee71ab384beba0bea45
1 /* Generic definitions for dealing with Mach thread states.
2 Copyright (C) 1994, 1996 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
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 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
21 /* Everything else is called `thread_state', but CMU's header file is
22 called `thread_status'. Oh boy. */
23 #include <mach/thread_status.h>
25 /* The machine-dependent thread_state.h file can either define these
26 macros, or just define PC and SP to the register names. */
28 #ifndef MACHINE_THREAD_STATE_SET_PC
29 #define MACHINE_THREAD_STATE_SET_PC(ts, pc) \
30 ((ts)->PC = (unsigned long int) (pc))
31 #endif
32 #ifndef MACHINE_THREAD_STATE_SET_SP
33 #ifdef STACK_GROWTH_UP
34 #define MACHINE_THREAD_STATE_SET_SP(ts, stack, size) \
35 ((ts)->SP = (unsigned long int) (stack))
36 #else
37 #define MACHINE_THREAD_STATE_SET_SP(ts, stack, size) \
38 ((ts)->SP = (unsigned long int) (stack) + (size))
39 #endif
40 #endif
42 /* These functions are of use in machine-dependent signal trampoline
43 implementations. */
45 #include <string.h> /* size_t, memcpy */
46 #include <mach/mach_interface.h> /* __thread_get_state */
48 static inline int
49 machine_get_state (thread_t thread, struct machine_thread_all_state *state,
50 int flavor, void *stateptr, void *scpptr, size_t size)
52 if (state->set & (1 << flavor))
54 /* Copy the saved state. */
55 memcpy (scpptr, stateptr, size);
56 return 1;
58 else
60 /* No one asked about this flavor of state before; fetch the state
61 directly from the kernel into the sigcontext. */
62 mach_msg_type_number_t got = (size / sizeof (int));
63 return (! __thread_get_state (thread, flavor, scpptr, &got)
64 && got == (size / sizeof (int)));
68 static inline int
69 machine_get_basic_state (thread_t thread,
70 struct machine_thread_all_state *state)
72 mach_msg_type_number_t count;
74 if (state->set & (1 << MACHINE_THREAD_STATE_FLAVOR))
75 return 1;
77 count = MACHINE_THREAD_STATE_COUNT;
78 if (__thread_get_state (thread, MACHINE_THREAD_STATE_FLAVOR,
79 (natural_t *) &state->basic,
80 &count) != KERN_SUCCESS ||
81 count != MACHINE_THREAD_STATE_COUNT)
82 /* What kind of thread?? */
83 return 0; /* XXX */
85 state->set |= 1 << MACHINE_THREAD_STATE_FLAVOR;
86 return 1;