--- /dev/null
+/* Target-dependent code for none, architecture independent.
+
+ Copyright (C) 2020 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 "gdbtypes.h"
+#include "none-tdep.h"
+#include "target.h"
+#include "gdbthread.h"
+#include "gdbcore.h"
+#include "regcache.h"
+#include "regset.h"
+#include "elf/common.h"
+#include "elf-bfd.h" /* for elfcore_write_* */
+#include "inferior.h"
+#include "cli/cli-utils.h"
+#include "arch-utils.h"
+#include "gdb_obstack.h"
+#include "observable.h"
+#include "objfiles.h"
+#include "infcall.h"
+#include "gdbcmd.h"
+#include "gdb_regex.h"
+#include "gdbsupport/enum-flags.h"
+#include "gdbsupport/gdb_optional.h"
+
+#include <ctype.h>
+
+using none_collect_thread_registers_ftype
+ = void (const struct regcache *, ptid_t, bfd *,
+ gdb::unique_xmalloc_ptr<char> &, int *, enum gdb_signal);
+
+/* The ARM none corefile setup is based on the ARM GNU/Linux design. */
+
+/* Structure for passing information from
+ none_collect_thread_registers via an iterator to
+ none_collect_regset_section_cb. */
+
+struct none_collect_regset_section_cb_data
+{
+ none_collect_regset_section_cb_data (struct gdbarch *gdbarch,
+ const struct regcache *regcache,
+ bfd *obfd,
+ gdb::unique_xmalloc_ptr<char> ¬e_data,
+ int *note_size,
+ unsigned long lwp,
+ enum gdb_signal stop_signal)
+ : gdbarch (gdbarch), regcache (regcache), obfd (obfd),
+ note_data (note_data), note_size (note_size),
+ lwp (lwp), stop_signal (stop_signal)
+ {}
+
+ struct gdbarch *gdbarch;
+ const struct regcache *regcache;
+ bfd *obfd;
+ gdb::unique_xmalloc_ptr<char> ¬e_data;
+ int *note_size;
+ unsigned long lwp;
+ enum gdb_signal stop_signal;
+ bool abort_iteration = false;
+};
+
+/* Callback for iterate_over_regset_sections that records a single
+ regset in the corefile note section. */
+
+static void
+none_collect_regset_section_cb (const char *sect_name, int supply_size,
+ int collect_size, const struct regset *regset,
+ const char *human_name, void *cb_data)
+{
+ struct none_collect_regset_section_cb_data *data
+ = (struct none_collect_regset_section_cb_data *) cb_data;
+ bool variable_size_section = (regset != nullptr
+ && regset->flags & REGSET_VARIABLE_SIZE);
+
+ if (!variable_size_section)
+ gdb_assert (supply_size == collect_size);
+
+ if (data->abort_iteration)
+ return;
+
+ gdb_assert (regset && regset->collect_regset);
+
+ /* This is intentionally zero-initialized by using std::vector, so
+ that any padding bytes in the core file will show as 0. */
+ std::vector<gdb_byte> buf (collect_size);
+
+ regset->collect_regset (regset, data->regcache, -1, buf.data (),
+ collect_size);
+
+ /* PRSTATUS still needs to be treated specially. */
+ if (strcmp (sect_name, ".reg") == 0)
+ data->note_data.reset (elfcore_write_prstatus
+ (data->obfd, data->note_data.release (),
+ data->note_size, data->lwp,
+ gdb_signal_to_host (data->stop_signal),
+ buf.data ()));
+ else
+ data->note_data.reset (elfcore_write_register_note
+ (data->obfd, data->note_data.release (),
+ data->note_size, sect_name, buf.data (),
+ collect_size));
+
+ if (data->note_data == nullptr)
+ data->abort_iteration = 1;
+}
+
+/* Records the thread's register state for the corefile note
+ section. */
+
+static void
+none_collect_thread_registers (const struct regcache *regcache,
+ ptid_t ptid, bfd *obfd,
+ gdb::unique_xmalloc_ptr<char> ¬e_data,
+ int *note_size, enum gdb_signal stop_signal)
+{
+ struct gdbarch *gdbarch = regcache->arch ();
+ unsigned long lwp;
+
+ /* For remote targets the LWP may not be available, so use the TID. */
+ lwp = ptid.lwp ();
+ if (lwp == 0)
+ lwp = ptid.tid ();
+
+ none_collect_regset_section_cb_data data (gdbarch, regcache, obfd, note_data,
+ note_size, lwp, stop_signal);
+
+ gdbarch_iterate_over_regset_sections (gdbarch,
+ none_collect_regset_section_cb,
+ &data, regcache);
+}
+
+struct none_corefile_thread_data
+{
+ none_corefile_thread_data (struct gdbarch *gdbarch,
+ bfd *obfd,
+ gdb::unique_xmalloc_ptr<char> ¬e_data,
+ int *note_size,
+ enum gdb_signal stop_signal)
+ : gdbarch (gdbarch), obfd (obfd), note_data (note_data),
+ note_size (note_size), stop_signal (stop_signal)
+ {}
+
+ struct gdbarch *gdbarch;
+ bfd *obfd;
+ gdb::unique_xmalloc_ptr<char> ¬e_data;
+ int *note_size;
+ enum gdb_signal stop_signal;
+};
+
+/* Records the thread's register state for the corefile note
+ section. */
+
+static void
+none_corefile_thread (struct thread_info *info,
+ struct none_corefile_thread_data *args)
+{
+ struct regcache *regcache;
+
+ regcache = get_thread_arch_regcache (info->inf->process_target (),
+ info->ptid, args->gdbarch);
+
+ target_fetch_registers (regcache, -1);
+ none_collect_thread_registers
+ (regcache, info->ptid, args->obfd, args->note_data,
+ args->note_size, args->stop_signal);
+}
+
+/* Find the signalled thread. In case there's more than one signalled
+ thread, prefer the current thread, if it is signalled. If no
+ thread was signalled, default to the current thread, unless it has
+ exited, in which case return nullptr. */
+
+static thread_info *
+find_signalled_thread ()
+{
+ thread_info *curr_thr = inferior_thread ();
+ if (curr_thr->state != THREAD_EXITED
+ && curr_thr->suspend.stop_signal != GDB_SIGNAL_0)
+ return curr_thr;
+
+ for (thread_info *thr : current_inferior ()->non_exited_threads ())
+ if (thr->suspend.stop_signal != GDB_SIGNAL_0)
+ return thr;
+
+ /* Default to the current thread, unless it has exited. */
+ if (curr_thr->state != THREAD_EXITED)
+ return curr_thr;
+
+ return nullptr;
+}
+
+/* Fills the "to_make_corefile_note" target vector. Builds the note
+ section for a corefile, and returns it in a malloc buffer. */
+
+static gdb::unique_xmalloc_ptr<char>
+none_make_corefile_notes_1 (struct gdbarch *gdbarch, bfd *obfd, int *note_size,
+ none_collect_thread_registers_ftype collect)
+{
+ gdb::unique_xmalloc_ptr<char> note_data;
+
+ /* Process information. */
+ if (get_exec_file (0))
+ {
+ const char *fname = lbasename (get_exec_file (0));
+ std::string psargs = fname;
+
+ if (get_inferior_args ())
+ {
+ psargs += " ";
+ psargs += get_inferior_args ();
+ }
+
+ note_data.reset (elfcore_write_prpsinfo (obfd, note_data.release (),
+ note_size, fname,
+ psargs.c_str ()));
+ }
+
+ if (!note_data)
+ return nullptr;
+
+ /* Thread register information. */
+ try
+ {
+ update_thread_list ();
+ }
+ catch (const gdb_exception_error &e)
+ {
+ exception_print (gdb_stderr, e);
+ }
+
+ /* Like the kernel, prefer dumping the signalled thread first.
+ "First thread" is what tools use to infer the signalled
+ thread. */
+ thread_info *signalled_thr = find_signalled_thread ();
+ gdb_signal stop_signal;
+
+ if (signalled_thr != nullptr)
+ stop_signal = signalled_thr->suspend.stop_signal;
+ else
+ stop_signal = GDB_SIGNAL_0;
+
+ none_corefile_thread_data thread_args (gdbarch, obfd, note_data, note_size,
+ stop_signal);
+
+ if (signalled_thr != nullptr)
+ none_corefile_thread (signalled_thr, &thread_args);
+ for (thread_info *thr : current_inferior ()->non_exited_threads ())
+ {
+ if (thr == signalled_thr)
+ continue;
+
+ none_corefile_thread (thr, &thread_args);
+ }
+
+ return note_data;
+}
+
+static gdb::unique_xmalloc_ptr<char>
+none_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size)
+{
+ return none_make_corefile_notes_1 (gdbarch, obfd, note_size,
+ none_collect_thread_registers);
+}
+
+/* Setup default core file support for none targets.
+ Can be overridden later by OSABI. */
+
+void
+none_init_corefile (struct gdbarch_info info,
+ struct gdbarch *gdbarch)
+{
+ /* Default core file support. */
+ set_gdbarch_make_corefile_notes (gdbarch, none_make_corefile_notes);
+}
projects / thirdparty / binutils-gdb.git / blobdiff