/* Target-dependent code for FreeBSD, architecture-independent.
- Copyright (C) 2002-2020 Free Software Foundation, Inc.
+ Copyright (C) 2002-2021 Free Software Foundation, Inc.
This file is part of GDB.
#include "auxv.h"
#include "gdbcore.h"
#include "inferior.h"
+#include "objfiles.h"
#include "regcache.h"
#include "regset.h"
#include "gdbthread.h"
#include "elf-bfd.h"
#include "fbsd-tdep.h"
+#include "gcore-elf.h"
/* This enum is derived from FreeBSD's <sys/signal.h>. */
FREEBSD_SIGRTMAX = 126,
};
+/* Constants for values of si_code as defined in FreeBSD's
+ <sys/signal.h>. */
+
+#define FBSD_SI_USER 0x10001
+#define FBSD_SI_QUEUE 0x10002
+#define FBSD_SI_TIMER 0x10003
+#define FBSD_SI_ASYNCIO 0x10004
+#define FBSD_SI_MESGQ 0x10005
+#define FBSD_SI_KERNEL 0x10006
+#define FBSD_SI_LWP 0x10007
+
+#define FBSD_ILL_ILLOPC 1
+#define FBSD_ILL_ILLOPN 2
+#define FBSD_ILL_ILLADR 3
+#define FBSD_ILL_ILLTRP 4
+#define FBSD_ILL_PRVOPC 5
+#define FBSD_ILL_PRVREG 6
+#define FBSD_ILL_COPROC 7
+#define FBSD_ILL_BADSTK 8
+
+#define FBSD_BUS_ADRALN 1
+#define FBSD_BUS_ADRERR 2
+#define FBSD_BUS_OBJERR 3
+#define FBSD_BUS_OOMERR 100
+
+#define FBSD_SEGV_MAPERR 1
+#define FBSD_SEGV_ACCERR 2
+#define FBSD_SEGV_PKUERR 100
+
+#define FBSD_FPE_INTOVF 1
+#define FBSD_FPE_INTDIV 2
+#define FBSD_FPE_FLTDIV 3
+#define FBSD_FPE_FLTOVF 4
+#define FBSD_FPE_FLTUND 5
+#define FBSD_FPE_FLTRES 6
+#define FBSD_FPE_FLTINV 7
+#define FBSD_FPE_FLTSUB 8
+
+#define FBSD_TRAP_BRKPT 1
+#define FBSD_TRAP_TRACE 2
+#define FBSD_TRAP_DTRACE 3
+#define FBSD_TRAP_CAP 4
+
+#define FBSD_CLD_EXITED 1
+#define FBSD_CLD_KILLED 2
+#define FBSD_CLD_DUMPED 3
+#define FBSD_CLD_TRAPPED 4
+#define FBSD_CLD_STOPPED 5
+#define FBSD_CLD_CONTINUED 6
+
+#define FBSD_POLL_IN 1
+#define FBSD_POLL_OUT 2
+#define FBSD_POLL_MSG 3
+#define FBSD_POLL_ERR 4
+#define FBSD_POLL_PRI 5
+#define FBSD_POLL_HUP 6
+
/* FreeBSD kernels 12.0 and later include a copy of the
'ptrace_lwpinfo' structure returned by the PT_LWPINFO ptrace
operation in an ELF core note (NT_FREEBSD_PTLWPINFO) for each LWP.
return 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
-{
- const struct regcache *regcache;
- bfd *obfd;
- char *note_data;
- int *note_size;
- unsigned long lwp;
- enum gdb_signal stop_signal;
- int abort_iteration;
-};
-
-static void
-fbsd_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)
-{
- char *buf;
- 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 (collect_size);
- regset->collect_regset (regset, data->regcache, -1, buf, collect_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, 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, collect_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 = regcache->arch ();
- 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.lwp ();
-
- 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->inf->process_target (),
- 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);
-}
-
/* Return a byte_vector containing the contents of a core dump note
for the target object of type OBJECT. If STRUCTSIZE is non-zero,
the data is prefixed with a 32-bit integer size to match the format
fbsd_make_note_desc (enum target_object object, uint32_t structsize)
{
gdb::optional<gdb::byte_vector> buf =
- target_read_alloc (current_top_target (), object, NULL);
+ target_read_alloc (current_inferior ()->top_target (), object, NULL);
if (!buf || buf->empty ())
return {};
/* Create appropriate note sections for a corefile, returning them in
allocated memory. */
-static char *
+static gdb::unique_xmalloc_ptr<char>
fbsd_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size)
{
- struct fbsd_corefile_thread_data thread_args;
- char *note_data = NULL;
+ gdb::unique_xmalloc_ptr<char> note_data;
Elf_Internal_Ehdr *i_ehdrp;
struct thread_info *curr_thr, *signalled_thr;
if (infargs != NULL)
psargs = psargs + " " + infargs;
- note_data = elfcore_write_prpsinfo (obfd, note_data, note_size,
- fname, psargs.c_str ());
+ note_data.reset (elfcore_write_prpsinfo (obfd, note_data.release (),
+ note_size, fname,
+ psargs.c_str ()));
}
/* Thread register information. */
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);
+ enum gdb_signal stop_signal = signalled_thr->suspend.stop_signal;
+ 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;
- fbsd_corefile_thread (thr, &thread_args);
+ gcore_elf_build_thread_register_notes (gdbarch, thr, stop_signal,
+ obfd, ¬e_data, note_size);
}
- note_data = thread_args.note_data;
-
/* Auxiliary vector. */
uint32_t structsize = gdbarch_ptr_bit (gdbarch) / 4; /* Elf_Auxinfo */
gdb::optional<gdb::byte_vector> note_desc =
fbsd_make_note_desc (TARGET_OBJECT_AUXV, structsize);
if (note_desc && !note_desc->empty ())
{
- note_data = elfcore_write_note (obfd, note_data, note_size, "FreeBSD",
- NT_FREEBSD_PROCSTAT_AUXV,
- note_desc->data (), note_desc->size ());
+ note_data.reset (elfcore_write_note (obfd, note_data.release (),
+ note_size, "FreeBSD",
+ NT_FREEBSD_PROCSTAT_AUXV,
+ note_desc->data (),
+ note_desc->size ()));
if (!note_data)
return NULL;
}
note_desc = fbsd_make_note_desc (TARGET_OBJECT_FREEBSD_VMMAP, 0);
if (note_desc && !note_desc->empty ())
{
- note_data = elfcore_write_note (obfd, note_data, note_size, "FreeBSD",
- NT_FREEBSD_PROCSTAT_VMMAP,
- note_desc->data (), note_desc->size ());
+ note_data.reset (elfcore_write_note (obfd, note_data.release (),
+ note_size, "FreeBSD",
+ NT_FREEBSD_PROCSTAT_VMMAP,
+ note_desc->data (),
+ note_desc->size ()));
if (!note_data)
return NULL;
}
note_desc = fbsd_make_note_desc (TARGET_OBJECT_FREEBSD_PS_STRINGS, 0);
if (note_desc && !note_desc->empty ())
{
- note_data = elfcore_write_note (obfd, note_data, note_size, "FreeBSD",
- NT_FREEBSD_PROCSTAT_PSSTRINGS,
- note_desc->data (), note_desc->size ());
+ note_data.reset (elfcore_write_note (obfd, note_data.release (),
+ note_size, "FreeBSD",
+ NT_FREEBSD_PROCSTAT_PSSTRINGS,
+ note_desc->data (),
+ note_desc->size ()));
if (!note_data)
return NULL;
}
+ /* Include the target description when possible. */
+ gcore_elf_make_tdesc_note (obfd, ¬e_data, note_size);
+
return note_data;
}
pid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF,
TYPE_LENGTH (int32_type) * TARGET_CHAR_BIT, "__pid_t");
TYPE_TARGET_TYPE (pid_type) = int32_type;
- TYPE_TARGET_STUB (pid_type) = 1;
+ pid_type->set_target_is_stub (true);
/* __uid_t */
uid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF,
TYPE_LENGTH (uint32_type) * TARGET_CHAR_BIT,
"__uid_t");
TYPE_TARGET_TYPE (uid_type) = uint32_type;
- TYPE_TARGET_STUB (uid_type) = 1;
+ pid_type->set_target_is_stub (true);
/* _reason */
reason_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
static int
fbsd_gdb_signal_to_target (struct gdbarch *gdbarch,
- enum gdb_signal signal)
+ enum gdb_signal signal)
{
switch (signal)
{
return addr + offset;
}
+/* See fbsd-tdep.h. */
+
+CORE_ADDR
+fbsd_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc)
+{
+ struct bound_minimal_symbol msym = lookup_bound_minimal_symbol ("_rtld_bind");
+ if (msym.minsym != nullptr && BMSYMBOL_VALUE_ADDRESS (msym) == pc)
+ return frame_unwind_caller_pc (get_current_frame ());
+
+ return 0;
+}
+
+/* Return description of signal code or nullptr. */
+
+static const char *
+fbsd_signal_cause (enum gdb_signal siggnal, int code)
+{
+ /* Signal-independent causes. */
+ switch (code)
+ {
+ case FBSD_SI_USER:
+ return _("Sent by kill()");
+ case FBSD_SI_QUEUE:
+ return _("Sent by sigqueue()");
+ case FBSD_SI_TIMER:
+ return _("Timer expired");
+ case FBSD_SI_ASYNCIO:
+ return _("Asynchronous I/O request completed");
+ case FBSD_SI_MESGQ:
+ return _("Message arrived on empty message queue");
+ case FBSD_SI_KERNEL:
+ return _("Sent by kernel");
+ case FBSD_SI_LWP:
+ return _("Sent by thr_kill()");
+ }
+
+ switch (siggnal)
+ {
+ case GDB_SIGNAL_ILL:
+ switch (code)
+ {
+ case FBSD_ILL_ILLOPC:
+ return _("Illegal opcode");
+ case FBSD_ILL_ILLOPN:
+ return _("Illegal operand");
+ case FBSD_ILL_ILLADR:
+ return _("Illegal addressing mode");
+ case FBSD_ILL_ILLTRP:
+ return _("Illegal trap");
+ case FBSD_ILL_PRVOPC:
+ return _("Privileged opcode");
+ case FBSD_ILL_PRVREG:
+ return _("Privileged register");
+ case FBSD_ILL_COPROC:
+ return _("Coprocessor error");
+ case FBSD_ILL_BADSTK:
+ return _("Internal stack error");
+ }
+ break;
+ case GDB_SIGNAL_BUS:
+ switch (code)
+ {
+ case FBSD_BUS_ADRALN:
+ return _("Invalid address alignment");
+ case FBSD_BUS_ADRERR:
+ return _("Address not present");
+ case FBSD_BUS_OBJERR:
+ return _("Object-specific hardware error");
+ case FBSD_BUS_OOMERR:
+ return _("Out of memory");
+ }
+ break;
+ case GDB_SIGNAL_SEGV:
+ switch (code)
+ {
+ case FBSD_SEGV_MAPERR:
+ return _("Address not mapped to object");
+ case FBSD_SEGV_ACCERR:
+ return _("Invalid permissions for mapped object");
+ case FBSD_SEGV_PKUERR:
+ return _("PKU violation");
+ }
+ break;
+ case GDB_SIGNAL_FPE:
+ switch (code)
+ {
+ case FBSD_FPE_INTOVF:
+ return _("Integer overflow");
+ case FBSD_FPE_INTDIV:
+ return _("Integer divide by zero");
+ case FBSD_FPE_FLTDIV:
+ return _("Floating point divide by zero");
+ case FBSD_FPE_FLTOVF:
+ return _("Floating point overflow");
+ case FBSD_FPE_FLTUND:
+ return _("Floating point underflow");
+ case FBSD_FPE_FLTRES:
+ return _("Floating point inexact result");
+ case FBSD_FPE_FLTINV:
+ return _("Invalid floating point operation");
+ case FBSD_FPE_FLTSUB:
+ return _("Subscript out of range");
+ }
+ break;
+ case GDB_SIGNAL_TRAP:
+ switch (code)
+ {
+ case FBSD_TRAP_BRKPT:
+ return _("Breakpoint");
+ case FBSD_TRAP_TRACE:
+ return _("Trace trap");
+ case FBSD_TRAP_DTRACE:
+ return _("DTrace-induced trap");
+ case FBSD_TRAP_CAP:
+ return _("Capability violation");
+ }
+ break;
+ case GDB_SIGNAL_CHLD:
+ switch (code)
+ {
+ case FBSD_CLD_EXITED:
+ return _("Child has exited");
+ case FBSD_CLD_KILLED:
+ return _("Child has terminated abnormally");
+ case FBSD_CLD_DUMPED:
+ return _("Child has dumped core");
+ case FBSD_CLD_TRAPPED:
+ return _("Traced child has trapped");
+ case FBSD_CLD_STOPPED:
+ return _("Child has stopped");
+ case FBSD_CLD_CONTINUED:
+ return _("Stopped child has continued");
+ }
+ break;
+ case GDB_SIGNAL_POLL:
+ switch (code)
+ {
+ case FBSD_POLL_IN:
+ return _("Data input available");
+ case FBSD_POLL_OUT:
+ return _("Output buffers available");
+ case FBSD_POLL_MSG:
+ return _("Input message available");
+ case FBSD_POLL_ERR:
+ return _("I/O error");
+ case FBSD_POLL_PRI:
+ return _("High priority input available");
+ case FBSD_POLL_HUP:
+ return _("Device disconnected");
+ }
+ break;
+ }
+
+ return nullptr;
+}
+
+/* Report additional details for a signal stop. */
+
+static void
+fbsd_report_signal_info (struct gdbarch *gdbarch, struct ui_out *uiout,
+ enum gdb_signal siggnal)
+{
+ LONGEST code, mqd, pid, status, timerid, uid;
+
+ try
+ {
+ code = parse_and_eval_long ("$_siginfo.si_code");
+ pid = parse_and_eval_long ("$_siginfo.si_pid");
+ uid = parse_and_eval_long ("$_siginfo.si_uid");
+ status = parse_and_eval_long ("$_siginfo.si_status");
+ timerid = parse_and_eval_long ("$_siginfo._reason._timer.si_timerid");
+ mqd = parse_and_eval_long ("$_siginfo._reason._mesgq.si_mqd");
+ }
+ catch (const gdb_exception_error &e)
+ {
+ return;
+ }
+
+ const char *meaning = fbsd_signal_cause (siggnal, code);
+ if (meaning == nullptr)
+ return;
+
+ uiout->text (".\n");
+ uiout->field_string ("sigcode-meaning", meaning);
+
+ switch (code)
+ {
+ case FBSD_SI_USER:
+ case FBSD_SI_QUEUE:
+ case FBSD_SI_LWP:
+ uiout->text (" from pid ");
+ uiout->field_string ("sending-pid", plongest (pid));
+ uiout->text (" and user ");
+ uiout->field_string ("sending-uid", plongest (uid));
+ return;
+ case FBSD_SI_TIMER:
+ uiout->text (": timerid ");
+ uiout->field_string ("timerid", plongest (timerid));
+ return;
+ case FBSD_SI_MESGQ:
+ uiout->text (": message queue ");
+ uiout->field_string ("message-queue", plongest (mqd));
+ return;
+ case FBSD_SI_ASYNCIO:
+ return;
+ }
+
+ if (siggnal == GDB_SIGNAL_CHLD)
+ {
+ uiout->text (": pid ");
+ uiout->field_string ("child-pid", plongest (pid));
+ uiout->text (", uid ");
+ uiout->field_string ("child-uid", plongest (uid));
+ if (code == FBSD_CLD_EXITED)
+ {
+ uiout->text (", exit status ");
+ uiout->field_string ("exit-status", plongest (status));
+ }
+ else
+ {
+ uiout->text (", signal ");
+ uiout->field_string ("signal", plongest (status));
+ }
+ }
+}
+
/* To be called from GDB_OSABI_FREEBSD handlers. */
void
set_gdbarch_get_siginfo_type (gdbarch, fbsd_get_siginfo_type);
set_gdbarch_gdb_signal_from_target (gdbarch, fbsd_gdb_signal_from_target);
set_gdbarch_gdb_signal_to_target (gdbarch, fbsd_gdb_signal_to_target);
+ set_gdbarch_report_signal_info (gdbarch, fbsd_report_signal_info);
+ set_gdbarch_skip_solib_resolver (gdbarch, fbsd_skip_solib_resolver);
/* `catch syscall' */
set_xml_syscall_file_name (gdbarch, "syscalls/freebsd.xml");
projects / deliverable / binutils-gdb.git / blobdiff