1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/* Common code for targets with the none ABI (bare-metal), but where the
BFD library is build with ELF support.
Copyright (C) 2020-2024 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "elf-none-tdep.h"
#include "regset.h"
#include "elf-bfd.h"
#include "inferior.h"
#include "regcache.h"
#include "gdbarch.h"
#include "gcore.h"
#include "gcore-elf.h"
/* Build the note section for a corefile, and return it in a malloc
buffer. Currently this just dumps all available registers for each
thread. */
static gdb::unique_xmalloc_ptr<char>
elf_none_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd,
int *note_size)
{
gdb::unique_xmalloc_ptr<char> note_data;
/* Add note information about the executable and its arguments. */
std::string fname;
std::string psargs;
static const size_t fname_len = 16;
static const size_t psargs_len = 80;
if (get_exec_file (0))
{
const char *exe = get_exec_file (0);
fname = lbasename (exe);
psargs = std::string (exe);
const std::string &infargs = current_inferior ()->args ();
if (!infargs.empty ())
psargs += ' ' + infargs;
/* All existing targets that handle writing out prpsinfo expect the
fname and psargs strings to be at least 16 and 80 characters long
respectively, including a null terminator at the end. Resize to
the expected length minus one to ensure there is a null within the
required length. */
fname.resize (fname_len - 1);
psargs.resize (psargs_len - 1);
}
/* Resize the buffers up to their required lengths. This will fill any
remaining space with the null character. */
fname.resize (fname_len);
psargs.resize (psargs_len);
/* Now write out the prpsinfo structure. */
note_data.reset (elfcore_write_prpsinfo (obfd, note_data.release (),
note_size, fname.c_str (),
psargs.c_str ()));
if (note_data == nullptr)
return nullptr;
/* Thread register information. */
try
{
update_thread_list ();
}
catch (const gdb_exception_error &e)
{
exception_print (gdb_stderr, e);
}
/* Like the Linux kernel, prefer dumping the signalled thread first.
"First thread" is what tools use to infer the signalled thread. */
thread_info *signalled_thr = gcore_find_signalled_thread ();
/* All threads are reported as having been stopped by the same signal
that stopped SIGNALLED_THR. */
gdb_signal stop_signal;
if (signalled_thr != nullptr)
stop_signal = signalled_thr->stop_signal ();
else
stop_signal = GDB_SIGNAL_0;
if (signalled_thr != nullptr)
gcore_elf_build_thread_register_notes (gdbarch, signalled_thr,
stop_signal, obfd, ¬e_data,
note_size);
for (thread_info *thr : current_inferior ()->non_exited_threads ())
{
if (thr == signalled_thr)
continue;
gcore_elf_build_thread_register_notes (gdbarch, thr, stop_signal, obfd,
¬e_data, note_size);
}
/* Include the target description when possible. Some architectures
allow for per-thread gdbarch so we should really be emitting a tdesc
per-thread, however, we don't currently support reading in a
per-thread tdesc, so just emit the tdesc for the signalled thread. */
gdbarch = target_thread_architecture (signalled_thr->ptid);
gcore_elf_make_tdesc_note (gdbarch, obfd, ¬e_data, note_size);
return note_data;
}
/* See none-tdep.h. */
void
elf_none_init_abi (struct gdbarch *gdbarch)
{
/* Default core file support. */
set_gdbarch_make_corefile_notes (gdbarch, elf_none_make_corefile_notes);
}
|
