1 /* Target-dependent code for GNU/Linux, architecture independent.
3 Copyright (C) 2009, 2010 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
22 #include "linux-tdep.h"
25 #include "elf/common.h"
28 static struct gdbarch_data *linux_gdbarch_data_handle;
30 struct linux_gdbarch_data
32 struct type *siginfo_type;
36 init_linux_gdbarch_data (struct gdbarch *gdbarch)
38 return GDBARCH_OBSTACK_ZALLOC (gdbarch, struct linux_gdbarch_data);
41 static struct linux_gdbarch_data *
42 get_linux_gdbarch_data (struct gdbarch *gdbarch)
44 return gdbarch_data (gdbarch, linux_gdbarch_data_handle);
47 /* This function is suitable for architectures that don't
48 extend/override the standard siginfo structure. */
51 linux_get_siginfo_type (struct gdbarch *gdbarch)
53 struct linux_gdbarch_data *linux_gdbarch_data;
54 struct type *int_type, *uint_type, *long_type, *void_ptr_type;
55 struct type *uid_type, *pid_type;
56 struct type *sigval_type, *clock_type;
57 struct type *siginfo_type, *sifields_type;
60 linux_gdbarch_data = get_linux_gdbarch_data (gdbarch);
61 if (linux_gdbarch_data->siginfo_type != NULL)
62 return linux_gdbarch_data->siginfo_type;
64 int_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
66 uint_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
68 long_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch),
70 void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void);
73 sigval_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
74 TYPE_NAME (sigval_type) = xstrdup ("sigval_t");
75 append_composite_type_field (sigval_type, "sival_int", int_type);
76 append_composite_type_field (sigval_type, "sival_ptr", void_ptr_type);
79 pid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, TYPE_LENGTH (int_type),
81 TYPE_TARGET_TYPE (pid_type) = int_type;
82 TYPE_TARGET_STUB (pid_type) = 1;
85 uid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, TYPE_LENGTH (uint_type),
87 TYPE_TARGET_TYPE (uid_type) = uint_type;
88 TYPE_TARGET_STUB (uid_type) = 1;
91 clock_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, TYPE_LENGTH (long_type),
92 xstrdup ("__clock_t"));
93 TYPE_TARGET_TYPE (clock_type) = long_type;
94 TYPE_TARGET_STUB (clock_type) = 1;
97 sifields_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
100 const int si_max_size = 128;
102 int size_of_int = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT;
105 if (gdbarch_ptr_bit (gdbarch) == 64)
106 si_pad_size = (si_max_size / size_of_int) - 4;
108 si_pad_size = (si_max_size / size_of_int) - 3;
109 append_composite_type_field (sifields_type, "_pad",
110 init_vector_type (int_type, si_pad_size));
114 type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
115 append_composite_type_field (type, "si_pid", pid_type);
116 append_composite_type_field (type, "si_uid", uid_type);
117 append_composite_type_field (sifields_type, "_kill", type);
120 type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
121 append_composite_type_field (type, "si_tid", int_type);
122 append_composite_type_field (type, "si_overrun", int_type);
123 append_composite_type_field (type, "si_sigval", sigval_type);
124 append_composite_type_field (sifields_type, "_timer", type);
127 type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
128 append_composite_type_field (type, "si_pid", pid_type);
129 append_composite_type_field (type, "si_uid", uid_type);
130 append_composite_type_field (type, "si_sigval", sigval_type);
131 append_composite_type_field (sifields_type, "_rt", type);
134 type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
135 append_composite_type_field (type, "si_pid", pid_type);
136 append_composite_type_field (type, "si_uid", uid_type);
137 append_composite_type_field (type, "si_status", int_type);
138 append_composite_type_field (type, "si_utime", clock_type);
139 append_composite_type_field (type, "si_stime", clock_type);
140 append_composite_type_field (sifields_type, "_sigchld", type);
143 type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
144 append_composite_type_field (type, "si_addr", void_ptr_type);
145 append_composite_type_field (sifields_type, "_sigfault", type);
148 type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
149 append_composite_type_field (type, "si_band", long_type);
150 append_composite_type_field (type, "si_fd", int_type);
151 append_composite_type_field (sifields_type, "_sigpoll", type);
154 siginfo_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
155 TYPE_NAME (siginfo_type) = xstrdup ("siginfo");
156 append_composite_type_field (siginfo_type, "si_signo", int_type);
157 append_composite_type_field (siginfo_type, "si_errno", int_type);
158 append_composite_type_field (siginfo_type, "si_code", int_type);
159 append_composite_type_field_aligned (siginfo_type,
160 "_sifields", sifields_type,
161 TYPE_LENGTH (long_type));
163 linux_gdbarch_data->siginfo_type = siginfo_type;
169 linux_has_shared_address_space (void)
171 /* Determine whether we are running on uClinux or normal Linux
174 int target_is_uclinux;
177 = (target_auxv_search (¤t_target, AT_NULL, &dummy) > 0
178 && target_auxv_search (¤t_target, AT_PAGESZ, &dummy) == 0);
180 return target_is_uclinux;
183 /* This is how we want PTIDs from core files to be printed. */
186 linux_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid)
190 if (ptid_get_lwp (ptid) != 0)
192 snprintf (buf, sizeof (buf), "LWP %ld", ptid_get_lwp (ptid));
196 return normal_pid_to_str (ptid);
199 /* To be called from the various GDB_OSABI_LINUX handlers for the
200 various GNU/Linux architectures and machine types. */
203 linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
205 set_gdbarch_core_pid_to_str (gdbarch, linux_core_pid_to_str);
209 _initialize_linux_tdep (void)
211 linux_gdbarch_data_handle =
212 gdbarch_data_register_post_init (init_linux_gdbarch_data);