/* Target-dependent code for FreeBSD, architecture-independent.
- Copyright (C) 2002-2016 Free Software Foundation, Inc.
+ Copyright (C) 2002-2017 Free Software Foundation, Inc.
This file is part of GDB.
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
+#include "auxv.h"
#include "gdbcore.h"
#include "inferior.h"
#include "regcache.h"
#include "regset.h"
#include "gdbthread.h"
+#include "xml-syscall.h"
#include "elf-bfd.h"
#include "fbsd-tdep.h"
+/* This is how we want PTIDs from core files to be printed. */
+
+static const char *
+fbsd_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid)
+{
+ static char buf[80];
+
+ if (ptid_get_lwp (ptid) != 0)
+ {
+ xsnprintf (buf, sizeof buf, "LWP %ld", ptid_get_lwp (ptid));
+ return buf;
+ }
+
+ return normal_pid_to_str (ptid);
+}
+
+/* Extract the name assigned to a thread from a core. Returns the
+ string in a static buffer. */
+
+static const char *
+fbsd_core_thread_name (struct gdbarch *gdbarch, struct thread_info *thr)
+{
+ static char buf[80];
+ struct bfd_section *section;
+ bfd_size_type size;
+ char sectionstr[32];
+
+ if (ptid_get_lwp (thr->ptid) != 0)
+ {
+ /* FreeBSD includes a NT_FREEBSD_THRMISC note for each thread
+ whose contents are defined by a "struct thrmisc" declared in
+ <sys/procfs.h> on FreeBSD. The per-thread name is stored as
+ a null-terminated string as the first member of the
+ structure. Rather than define the full structure here, just
+ extract the null-terminated name from the start of the
+ note. */
+ xsnprintf (sectionstr, sizeof sectionstr, ".thrmisc/%ld",
+ ptid_get_lwp (thr->ptid));
+ section = bfd_get_section_by_name (core_bfd, sectionstr);
+ if (section != NULL && bfd_section_size (core_bfd, section) > 0)
+ {
+ /* Truncate the name if it is longer than "buf". */
+ size = bfd_section_size (core_bfd, section);
+ if (size > sizeof buf - 1)
+ size = sizeof buf - 1;
+ if (bfd_get_section_contents (core_bfd, section, buf, (file_ptr) 0,
+ size)
+ && buf[0] != '\0')
+ {
+ buf[size] = '\0';
+
+ /* Note that each thread will report the process command
+ as its thread name instead of an empty name if a name
+ has not been set explicitly. Return a NULL name in
+ that case. */
+ if (strcmp (buf, elf_tdata (core_bfd)->core->program) != 0)
+ return buf;
+ }
+ }
+ }
+
+ return NULL;
+}
+
static int
find_signalled_thread (struct thread_info *info, void *data)
{
return 0;
}
-static enum gdb_signal
-find_stop_signal (void)
-{
- struct thread_info *info =
- iterate_over_threads (find_signalled_thread, NULL);
-
- if (info)
- return info->suspend.stop_signal;
- else
- return GDB_SIGNAL_0;
-}
+/* Structure for passing information from
+ fbsd_collect_thread_registers via an iterator to
+ fbsd_collect_regset_section_cb. */
struct fbsd_collect_regset_section_cb_data
{
bfd *obfd;
char *note_data;
int *note_size;
+ unsigned long lwp;
+ enum gdb_signal stop_signal;
+ int abort_iteration;
};
static void
struct fbsd_collect_regset_section_cb_data *data
= (struct fbsd_collect_regset_section_cb_data *) cb_data;
+ if (data->abort_iteration)
+ return;
+
gdb_assert (regset->collect_regset);
buf = (char *) xmalloc (size);
/* PRSTATUS still needs to be treated specially. */
if (strcmp (sect_name, ".reg") == 0)
data->note_data = (char *) elfcore_write_prstatus
- (data->obfd, data->note_data, data->note_size,
- ptid_get_pid (inferior_ptid), find_stop_signal (), buf);
+ (data->obfd, data->note_data, data->note_size, data->lwp,
+ gdb_signal_to_host (data->stop_signal), buf);
else
data->note_data = (char *) elfcore_write_register_note
(data->obfd, data->note_data, data->note_size,
sect_name, buf, size);
xfree (buf);
+
+ if (data->note_data == NULL)
+ data->abort_iteration = 1;
+}
+
+/* Records the thread's register state for the corefile note
+ section. */
+
+static char *
+fbsd_collect_thread_registers (const struct regcache *regcache,
+ ptid_t ptid, bfd *obfd,
+ char *note_data, int *note_size,
+ enum gdb_signal stop_signal)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct fbsd_collect_regset_section_cb_data data;
+
+ data.regcache = regcache;
+ data.obfd = obfd;
+ data.note_data = note_data;
+ data.note_size = note_size;
+ data.stop_signal = stop_signal;
+ data.abort_iteration = 0;
+ data.lwp = ptid_get_lwp (ptid);
+
+ gdbarch_iterate_over_regset_sections (gdbarch,
+ fbsd_collect_regset_section_cb,
+ &data, regcache);
+ return data.note_data;
+}
+
+struct fbsd_corefile_thread_data
+{
+ struct gdbarch *gdbarch;
+ bfd *obfd;
+ char *note_data;
+ int *note_size;
+ enum gdb_signal stop_signal;
+};
+
+/* Records the thread's register state for the corefile note
+ section. */
+
+static void
+fbsd_corefile_thread (struct thread_info *info,
+ struct fbsd_corefile_thread_data *args)
+{
+ struct regcache *regcache;
+
+ regcache = get_thread_arch_regcache (info->ptid, args->gdbarch);
+
+ target_fetch_registers (regcache, -1);
+
+ args->note_data = fbsd_collect_thread_registers
+ (regcache, info->ptid, args->obfd, args->note_data,
+ args->note_size, args->stop_signal);
}
/* Create appropriate note sections for a corefile, returning them in
static char *
fbsd_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size)
{
- struct regcache *regcache = get_current_regcache ();
- char *note_data;
+ struct fbsd_corefile_thread_data thread_args;
+ char *note_data = NULL;
Elf_Internal_Ehdr *i_ehdrp;
- struct fbsd_collect_regset_section_cb_data data;
+ struct thread_info *curr_thr, *signalled_thr, *thr;
/* Put a "FreeBSD" label in the ELF header. */
i_ehdrp = elf_elfheader (obfd);
gdb_assert (gdbarch_iterate_over_regset_sections_p (gdbarch));
- data.regcache = regcache;
- data.obfd = obfd;
- data.note_data = NULL;
- data.note_size = note_size;
- target_fetch_registers (regcache, -1);
- gdbarch_iterate_over_regset_sections (gdbarch,
- fbsd_collect_regset_section_cb,
- &data, regcache);
- note_data = data.note_data;
-
if (get_exec_file (0))
{
const char *fname = lbasename (get_exec_file (0));
fname, psargs);
}
+ /* Thread register information. */
+ TRY
+ {
+ update_thread_list ();
+ }
+ CATCH (e, RETURN_MASK_ERROR)
+ {
+ exception_print (gdb_stderr, e);
+ }
+ END_CATCH
+
+ /* Like the kernel, prefer dumping the signalled thread first.
+ "First thread" is what tools use to infer the signalled thread.
+ In case there's more than one signalled thread, prefer the
+ current thread, if it is signalled. */
+ curr_thr = inferior_thread ();
+ if (curr_thr->suspend.stop_signal != GDB_SIGNAL_0)
+ signalled_thr = curr_thr;
+ else
+ {
+ signalled_thr = iterate_over_threads (find_signalled_thread, NULL);
+ if (signalled_thr == NULL)
+ signalled_thr = curr_thr;
+ }
+
+ thread_args.gdbarch = gdbarch;
+ thread_args.obfd = obfd;
+ thread_args.note_data = note_data;
+ thread_args.note_size = note_size;
+ thread_args.stop_signal = signalled_thr->suspend.stop_signal;
+
+ fbsd_corefile_thread (signalled_thr, &thread_args);
+ ALL_NON_EXITED_THREADS (thr)
+ {
+ if (thr == signalled_thr)
+ continue;
+ if (ptid_get_pid (thr->ptid) != ptid_get_pid (inferior_ptid))
+ continue;
+
+ fbsd_corefile_thread (thr, &thread_args);
+ }
+
+ note_data = thread_args.note_data;
+
return note_data;
}
-/* To be called from GDB_OSABI_FREEBSD_ELF handlers. */
+/* Print descriptions of FreeBSD-specific AUXV entries to FILE. */
+
+static void
+fbsd_print_auxv_entry (struct gdbarch *gdbarch, struct ui_file *file,
+ CORE_ADDR type, CORE_ADDR val)
+{
+ const char *name;
+ const char *description;
+ enum auxv_format format;
+
+ switch (type)
+ {
+#define _TAGNAME(tag) #tag
+#define TAGNAME(tag) _TAGNAME(AT_##tag)
+#define TAG(tag, text, kind) \
+ case AT_FREEBSD_##tag: name = TAGNAME(tag); description = text; format = kind; break
+ TAG (EXECPATH, _("Executable path"), AUXV_FORMAT_STR);
+ TAG (CANARY, _("Canary for SSP"), AUXV_FORMAT_HEX);
+ TAG (CANARYLEN, ("Length of the SSP canary"), AUXV_FORMAT_DEC);
+ TAG (OSRELDATE, _("OSRELDATE"), AUXV_FORMAT_DEC);
+ TAG (NCPUS, _("Number of CPUs"), AUXV_FORMAT_DEC);
+ TAG (PAGESIZES, _("Pagesizes"), AUXV_FORMAT_HEX);
+ TAG (PAGESIZESLEN, _("Number of pagesizes"), AUXV_FORMAT_DEC);
+ TAG (TIMEKEEP, _("Pointer to timehands"), AUXV_FORMAT_HEX);
+ TAG (STACKPROT, _("Initial stack protection"), AUXV_FORMAT_HEX);
+ default:
+ default_print_auxv_entry (gdbarch, file, type, val);
+ return;
+ }
+
+ fprint_auxv_entry (file, name, description, format, type, val);
+}
+
+/* Implement the "get_syscall_number" gdbarch method. */
+
+static LONGEST
+fbsd_get_syscall_number (struct gdbarch *gdbarch,
+ ptid_t ptid)
+{
+
+ /* FreeBSD doesn't use gdbarch_get_syscall_number since FreeBSD
+ native targets fetch the system call number from the
+ 'pl_syscall_code' member of struct ptrace_lwpinfo in fbsd_wait.
+ However, system call catching requires this function to be
+ set. */
+
+ internal_error (__FILE__, __LINE__, _("fbsd_get_sycall_number called"));
+}
+
+/* To be called from GDB_OSABI_FREEBSD handlers. */
void
fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
+ set_gdbarch_core_pid_to_str (gdbarch, fbsd_core_pid_to_str);
+ set_gdbarch_core_thread_name (gdbarch, fbsd_core_thread_name);
set_gdbarch_make_corefile_notes (gdbarch, fbsd_make_corefile_notes);
+ set_gdbarch_print_auxv_entry (gdbarch, fbsd_print_auxv_entry);
+
+ /* `catch syscall' */
+ set_xml_syscall_file_name (gdbarch, "syscalls/freebsd.xml");
+ set_gdbarch_get_syscall_number (gdbarch, fbsd_get_syscall_number);
}
projects / deliverable / binutils-gdb.git / blobdiff