]>
Commit | Line | Data |
---|---|---|
28f540f4 | 1 | /* Generic definitions for dealing with Mach thread states. |
04277e02 | 2 | Copyright (C) 1994-2019 Free Software Foundation, Inc. |
6d52618b | 3 | This file is part of the GNU C Library. |
28f540f4 | 4 | |
6d52618b | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
28f540f4 | 9 | |
6d52618b UD |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
28f540f4 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 RM |
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 | ||
f8baf2a2 ST |
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 | ||
28f540f4 RM |
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 | ||
53 | static inline int | |
54 | machine_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 | { | |
6d52618b | 65 | /* No one asked about this flavor of state before; fetch the state |
28f540f4 RM |
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 | ||
73 | static inline int | |
74 | machine_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, | |
c5f65462 JM |
85 | &count) != KERN_SUCCESS |
86 | || count != MACHINE_THREAD_STATE_COUNT) | |
28f540f4 RM |
87 | /* What kind of thread?? */ |
88 | return 0; /* XXX */ | |
89 | ||
90 | state->set |= 1 << MACHINE_THREAD_STATE_FLAVOR; | |
91 | return 1; | |
92 | } |