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fb8f3fc0 AB |
1 | /* Common code for targets with the none ABI (bare-metal), but where the |
2 | BFD library is build with ELF support. | |
3 | ||
1d506c26 | 4 | Copyright (C) 2020-2024 Free Software Foundation, Inc. |
fb8f3fc0 AB |
5 | |
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | #include "defs.h" | |
22 | #include "elf-none-tdep.h" | |
23 | #include "regset.h" | |
ef0f16cc | 24 | #include "elf-bfd.h" |
fb8f3fc0 AB |
25 | #include "inferior.h" |
26 | #include "regcache.h" | |
27 | #include "gdbarch.h" | |
28 | #include "gcore.h" | |
29 | #include "gcore-elf.h" | |
30 | ||
31 | /* Build the note section for a corefile, and return it in a malloc | |
32 | buffer. Currently this just dumps all available registers for each | |
33 | thread. */ | |
34 | ||
35 | static gdb::unique_xmalloc_ptr<char> | |
36 | elf_none_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, | |
37 | int *note_size) | |
38 | { | |
39 | gdb::unique_xmalloc_ptr<char> note_data; | |
40 | ||
41 | /* Add note information about the executable and its arguments. */ | |
42 | std::string fname; | |
43 | std::string psargs; | |
44 | static const size_t fname_len = 16; | |
45 | static const size_t psargs_len = 80; | |
46 | if (get_exec_file (0)) | |
47 | { | |
48 | const char *exe = get_exec_file (0); | |
49 | fname = lbasename (exe); | |
50 | psargs = std::string (exe); | |
51 | ||
fd2dec2a SM |
52 | const std::string &infargs = current_inferior ()->args (); |
53 | if (!infargs.empty ()) | |
54 | psargs += ' ' + infargs; | |
fb8f3fc0 AB |
55 | |
56 | /* All existing targets that handle writing out prpsinfo expect the | |
57 | fname and psargs strings to be at least 16 and 80 characters long | |
58 | respectively, including a null terminator at the end. Resize to | |
59 | the expected length minus one to ensure there is a null within the | |
60 | required length. */ | |
61 | fname.resize (fname_len - 1); | |
62 | psargs.resize (psargs_len - 1); | |
63 | } | |
64 | ||
65 | /* Resize the buffers up to their required lengths. This will fill any | |
66 | remaining space with the null character. */ | |
67 | fname.resize (fname_len); | |
68 | psargs.resize (psargs_len); | |
69 | ||
70 | /* Now write out the prpsinfo structure. */ | |
71 | note_data.reset (elfcore_write_prpsinfo (obfd, note_data.release (), | |
72 | note_size, fname.c_str (), | |
73 | psargs.c_str ())); | |
74 | if (note_data == nullptr) | |
75 | return nullptr; | |
76 | ||
77 | /* Thread register information. */ | |
78 | try | |
79 | { | |
80 | update_thread_list (); | |
81 | } | |
82 | catch (const gdb_exception_error &e) | |
83 | { | |
84 | exception_print (gdb_stderr, e); | |
85 | } | |
86 | ||
87 | /* Like the Linux kernel, prefer dumping the signalled thread first. | |
88 | "First thread" is what tools use to infer the signalled thread. */ | |
89 | thread_info *signalled_thr = gcore_find_signalled_thread (); | |
90 | ||
91 | /* All threads are reported as having been stopped by the same signal | |
92 | that stopped SIGNALLED_THR. */ | |
93 | gdb_signal stop_signal; | |
94 | if (signalled_thr != nullptr) | |
1edb66d8 | 95 | stop_signal = signalled_thr->stop_signal (); |
fb8f3fc0 AB |
96 | else |
97 | stop_signal = GDB_SIGNAL_0; | |
98 | ||
99 | if (signalled_thr != nullptr) | |
100 | gcore_elf_build_thread_register_notes (gdbarch, signalled_thr, | |
101 | stop_signal, obfd, ¬e_data, | |
102 | note_size); | |
103 | for (thread_info *thr : current_inferior ()->non_exited_threads ()) | |
104 | { | |
105 | if (thr == signalled_thr) | |
106 | continue; | |
107 | ||
108 | gcore_elf_build_thread_register_notes (gdbarch, thr, stop_signal, obfd, | |
109 | ¬e_data, note_size); | |
110 | } | |
111 | ||
112 | ||
c14993e9 AB |
113 | /* Include the target description when possible. Some architectures |
114 | allow for per-thread gdbarch so we should really be emitting a tdesc | |
115 | per-thread, however, we don't currently support reading in a | |
116 | per-thread tdesc, so just emit the tdesc for the signalled thread. */ | |
117 | gdbarch = target_thread_architecture (signalled_thr->ptid); | |
118 | gcore_elf_make_tdesc_note (gdbarch, obfd, ¬e_data, note_size); | |
fb8f3fc0 AB |
119 | |
120 | return note_data; | |
121 | } | |
122 | ||
123 | /* See none-tdep.h. */ | |
124 | ||
125 | void | |
126 | elf_none_init_abi (struct gdbarch *gdbarch) | |
127 | { | |
128 | /* Default core file support. */ | |
129 | set_gdbarch_make_corefile_notes (gdbarch, elf_none_make_corefile_notes); | |
130 | } |