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4aa995e1 PA |
1 | /* Target-dependent code for GNU/Linux, architecture independent. |
2 | ||
4c38e0a4 | 3 | Copyright (C) 2009, 2010 Free Software Foundation, Inc. |
4aa995e1 PA |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "gdbtypes.h" | |
2c0b251b | 22 | #include "linux-tdep.h" |
6c95b8df PA |
23 | #include "auxv.h" |
24 | #include "target.h" | |
6c95b8df | 25 | #include "elf/common.h" |
4aa995e1 PA |
26 | |
27 | /* This function is suitable for architectures that don't | |
28 | extend/override the standard siginfo structure. */ | |
29 | ||
30 | struct type * | |
31 | linux_get_siginfo_type (struct gdbarch *gdbarch) | |
32 | { | |
33 | struct type *int_type, *uint_type, *long_type, *void_ptr_type; | |
34 | struct type *uid_type, *pid_type; | |
35 | struct type *sigval_type, *clock_type; | |
36 | struct type *siginfo_type, *sifields_type; | |
37 | struct type *type; | |
38 | ||
e9bb382b UW |
39 | int_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), |
40 | 0, "int"); | |
41 | uint_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), | |
42 | 1, "unsigned int"); | |
43 | long_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), | |
44 | 0, "long"); | |
4aa995e1 PA |
45 | void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void); |
46 | ||
47 | /* sival_t */ | |
e9bb382b | 48 | sigval_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION); |
4aa995e1 PA |
49 | TYPE_NAME (sigval_type) = xstrdup ("sigval_t"); |
50 | append_composite_type_field (sigval_type, "sival_int", int_type); | |
51 | append_composite_type_field (sigval_type, "sival_ptr", void_ptr_type); | |
52 | ||
53 | /* __pid_t */ | |
e9bb382b UW |
54 | pid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, TYPE_LENGTH (int_type), |
55 | xstrdup ("__pid_t")); | |
4aa995e1 | 56 | TYPE_TARGET_TYPE (pid_type) = int_type; |
e9bb382b | 57 | TYPE_TARGET_STUB (pid_type) = 1; |
4aa995e1 PA |
58 | |
59 | /* __uid_t */ | |
e9bb382b UW |
60 | uid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, TYPE_LENGTH (uint_type), |
61 | xstrdup ("__uid_t")); | |
4aa995e1 | 62 | TYPE_TARGET_TYPE (uid_type) = uint_type; |
e9bb382b | 63 | TYPE_TARGET_STUB (uid_type) = 1; |
4aa995e1 PA |
64 | |
65 | /* __clock_t */ | |
e9bb382b UW |
66 | clock_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, TYPE_LENGTH (long_type), |
67 | xstrdup ("__clock_t")); | |
4aa995e1 | 68 | TYPE_TARGET_TYPE (clock_type) = long_type; |
e9bb382b | 69 | TYPE_TARGET_STUB (clock_type) = 1; |
4aa995e1 PA |
70 | |
71 | /* _sifields */ | |
e9bb382b | 72 | sifields_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION); |
4aa995e1 PA |
73 | |
74 | { | |
75 | const int si_max_size = 128; | |
76 | int si_pad_size; | |
77 | int size_of_int = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT; | |
78 | ||
79 | /* _pad */ | |
80 | if (gdbarch_ptr_bit (gdbarch) == 64) | |
81 | si_pad_size = (si_max_size / size_of_int) - 4; | |
82 | else | |
83 | si_pad_size = (si_max_size / size_of_int) - 3; | |
84 | append_composite_type_field (sifields_type, "_pad", | |
85 | init_vector_type (int_type, si_pad_size)); | |
86 | } | |
87 | ||
88 | /* _kill */ | |
e9bb382b | 89 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
90 | append_composite_type_field (type, "si_pid", pid_type); |
91 | append_composite_type_field (type, "si_uid", uid_type); | |
92 | append_composite_type_field (sifields_type, "_kill", type); | |
93 | ||
94 | /* _timer */ | |
e9bb382b | 95 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
96 | append_composite_type_field (type, "si_tid", int_type); |
97 | append_composite_type_field (type, "si_overrun", int_type); | |
98 | append_composite_type_field (type, "si_sigval", sigval_type); | |
99 | append_composite_type_field (sifields_type, "_timer", type); | |
100 | ||
101 | /* _rt */ | |
e9bb382b | 102 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
103 | append_composite_type_field (type, "si_pid", pid_type); |
104 | append_composite_type_field (type, "si_uid", uid_type); | |
105 | append_composite_type_field (type, "si_sigval", sigval_type); | |
106 | append_composite_type_field (sifields_type, "_rt", type); | |
107 | ||
108 | /* _sigchld */ | |
e9bb382b | 109 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
110 | append_composite_type_field (type, "si_pid", pid_type); |
111 | append_composite_type_field (type, "si_uid", uid_type); | |
112 | append_composite_type_field (type, "si_status", int_type); | |
113 | append_composite_type_field (type, "si_utime", clock_type); | |
114 | append_composite_type_field (type, "si_stime", clock_type); | |
115 | append_composite_type_field (sifields_type, "_sigchld", type); | |
116 | ||
117 | /* _sigfault */ | |
e9bb382b | 118 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
119 | append_composite_type_field (type, "si_addr", void_ptr_type); |
120 | append_composite_type_field (sifields_type, "_sigfault", type); | |
121 | ||
122 | /* _sigpoll */ | |
e9bb382b | 123 | type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
124 | append_composite_type_field (type, "si_band", long_type); |
125 | append_composite_type_field (type, "si_fd", int_type); | |
126 | append_composite_type_field (sifields_type, "_sigpoll", type); | |
127 | ||
128 | /* struct siginfo */ | |
e9bb382b | 129 | siginfo_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
4aa995e1 PA |
130 | TYPE_NAME (siginfo_type) = xstrdup ("siginfo"); |
131 | append_composite_type_field (siginfo_type, "si_signo", int_type); | |
132 | append_composite_type_field (siginfo_type, "si_errno", int_type); | |
133 | append_composite_type_field (siginfo_type, "si_code", int_type); | |
134 | append_composite_type_field_aligned (siginfo_type, | |
135 | "_sifields", sifields_type, | |
136 | TYPE_LENGTH (long_type)); | |
137 | ||
138 | return siginfo_type; | |
139 | } | |
6b3ae818 | 140 | |
6c95b8df PA |
141 | int |
142 | linux_has_shared_address_space (void) | |
143 | { | |
144 | /* Determine whether we are running on uClinux or normal Linux | |
145 | kernel. */ | |
146 | CORE_ADDR dummy; | |
147 | int target_is_uclinux; | |
148 | ||
149 | target_is_uclinux | |
150 | = (target_auxv_search (¤t_target, AT_NULL, &dummy) > 0 | |
151 | && target_auxv_search (¤t_target, AT_PAGESZ, &dummy) == 0); | |
152 | ||
153 | return target_is_uclinux; | |
154 | } |