1 /* Target-dependent code for GNU/Linux, architecture independent.
3 Copyright (C) 2009, 2010, 2011 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
,
80 TYPE_LENGTH (int_type
), "__pid_t");
81 TYPE_TARGET_TYPE (pid_type
) = int_type
;
82 TYPE_TARGET_STUB (pid_type
) = 1;
85 uid_type
= arch_type (gdbarch
, TYPE_CODE_TYPEDEF
,
86 TYPE_LENGTH (uint_type
), "__uid_t");
87 TYPE_TARGET_TYPE (uid_type
) = uint_type
;
88 TYPE_TARGET_STUB (uid_type
) = 1;
91 clock_type
= arch_type (gdbarch
, TYPE_CODE_TYPEDEF
,
92 TYPE_LENGTH (long_type
), "__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
);