/* 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.
#include "fbsd-tdep.h"
+/* 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.
+ The constants below define the offset of field members and flags in
+ this structure used by methods in this file. Note that the
+ 'ptrace_lwpinfo' struct in the note is preceded by a 4 byte integer
+ containing the size of the structure. */
+
+#define LWPINFO_OFFSET 0x4
+
+/* Offsets in ptrace_lwpinfo. */
+#define LWPINFO_PL_FLAGS 0x8
+#define LWPINFO64_PL_SIGINFO 0x30
+#define LWPINFO32_PL_SIGINFO 0x2c
+
+/* Flags in pl_flags. */
+#define PL_FLAG_SI 0x20 /* siginfo is valid */
+
+/* Sizes of siginfo_t. */
+#define SIZE64_SIGINFO_T 80
+#define SIZE32_SIGINFO_T 64
+
+static struct gdbarch_data *fbsd_gdbarch_data_handle;
+
+struct fbsd_gdbarch_data
+ {
+ struct type *siginfo_type;
+ };
+
+static void *
+init_fbsd_gdbarch_data (struct gdbarch *gdbarch)
+{
+ return GDBARCH_OBSTACK_ZALLOC (gdbarch, struct fbsd_gdbarch_data);
+}
+
+static struct fbsd_gdbarch_data *
+get_fbsd_gdbarch_data (struct gdbarch *gdbarch)
+{
+ return ((struct fbsd_gdbarch_data *)
+ gdbarch_data (gdbarch, fbsd_gdbarch_data_handle));
+}
+
/* This is how we want PTIDs from core files to be printed. */
-static char *
+static const char *
fbsd_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid)
{
static char buf[80];
static char buf[80];
struct bfd_section *section;
bfd_size_type size;
- char sectionstr[32];
if (ptid_get_lwp (thr->ptid) != 0)
{
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);
+ thread_section_name section_name (".thrmisc", thr->ptid);
+
+ section = bfd_get_section_by_name (core_bfd, section_name.c_str ());
if (section != NULL && bfd_section_size (core_bfd, section) > 0)
{
/* Truncate the name if it is longer than "buf". */
return NULL;
}
+/* Implement the "core_xfer_siginfo" gdbarch method. */
+
+static LONGEST
+fbsd_core_xfer_siginfo (struct gdbarch *gdbarch, gdb_byte *readbuf,
+ ULONGEST offset, ULONGEST len)
+{
+ size_t siginfo_size;
+
+ if (gdbarch_long_bit (gdbarch) == 32)
+ siginfo_size = SIZE32_SIGINFO_T;
+ else
+ siginfo_size = SIZE64_SIGINFO_T;
+ if (offset > siginfo_size)
+ return -1;
+
+ thread_section_name section_name (".note.freebsdcore.lwpinfo", inferior_ptid);
+ asection *section = bfd_get_section_by_name (core_bfd, section_name.c_str ());
+ if (section == NULL)
+ return -1;
+
+ gdb_byte buf[4];
+ if (!bfd_get_section_contents (core_bfd, section, buf,
+ LWPINFO_OFFSET + LWPINFO_PL_FLAGS, 4))
+ return -1;
+
+ int pl_flags = extract_signed_integer (buf, 4, gdbarch_byte_order (gdbarch));
+ if (!(pl_flags & PL_FLAG_SI))
+ return -1;
+
+ if (offset + len > siginfo_size)
+ len = siginfo_size - offset;
+
+ ULONGEST siginfo_offset;
+ if (gdbarch_long_bit (gdbarch) == 32)
+ siginfo_offset = LWPINFO_OFFSET + LWPINFO32_PL_SIGINFO;
+ else
+ siginfo_offset = LWPINFO_OFFSET + LWPINFO64_PL_SIGINFO;
+
+ if (!bfd_get_section_contents (core_bfd, section, readbuf,
+ siginfo_offset + offset, len))
+ return -1;
+
+ return len;
+}
+
static int
find_signalled_thread (struct thread_info *info, void *data)
{
char *note_data, int *note_size,
enum gdb_signal stop_signal)
{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
struct fbsd_collect_regset_section_cb_data data;
data.regcache = regcache;
fbsd_corefile_thread (struct thread_info *info,
struct fbsd_corefile_thread_data *args)
{
- struct cleanup *old_chain;
struct regcache *regcache;
regcache = get_thread_arch_regcache (info->ptid, args->gdbarch);
- old_chain = save_inferior_ptid ();
- inferior_ptid = info->ptid;
target_fetch_registers (regcache, -1);
- do_cleanups (old_chain);
args->note_data = fbsd_collect_thread_registers
(regcache, info->ptid, args->obfd, args->note_data,
TAG (PAGESIZESLEN, _("Number of pagesizes"), AUXV_FORMAT_DEC);
TAG (TIMEKEEP, _("Pointer to timehands"), AUXV_FORMAT_HEX);
TAG (STACKPROT, _("Initial stack protection"), AUXV_FORMAT_HEX);
+ TAG (EHDRFLAGS, _("ELF header e_flags"), AUXV_FORMAT_HEX);
+ TAG (HWCAP, _("Machine-dependent CPU capability hints"), 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_siginfo_type" gdbarch method. */
+
+static struct type *
+fbsd_get_siginfo_type (struct gdbarch *gdbarch)
+{
+ struct fbsd_gdbarch_data *fbsd_gdbarch_data;
+ struct type *int_type, *int32_type, *uint32_type, *long_type, *void_ptr_type;
+ struct type *uid_type, *pid_type;
+ struct type *sigval_type, *reason_type;
+ struct type *siginfo_type;
+ struct type *type;
+
+ fbsd_gdbarch_data = get_fbsd_gdbarch_data (gdbarch);
+ if (fbsd_gdbarch_data->siginfo_type != NULL)
+ return fbsd_gdbarch_data->siginfo_type;
+
+ int_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
+ 0, "int");
+ int32_type = arch_integer_type (gdbarch, 32, 0, "int32_t");
+ uint32_type = arch_integer_type (gdbarch, 32, 1, "uint32_t");
+ long_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch),
+ 0, "long");
+ void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void);
+
+ /* union sigval */
+ sigval_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
+ TYPE_NAME (sigval_type) = xstrdup ("sigval");
+ append_composite_type_field (sigval_type, "sival_int", int_type);
+ append_composite_type_field (sigval_type, "sival_ptr", void_ptr_type);
+
+ /* __pid_t */
+ 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;
+
+ /* __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;
+
+ /* _reason */
+ reason_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
+
+ /* _fault */
+ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
+ append_composite_type_field (type, "si_trapno", int_type);
+ append_composite_type_field (reason_type, "_fault", type);
+
+ /* _timer */
+ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
+ append_composite_type_field (type, "si_timerid", int_type);
+ append_composite_type_field (type, "si_overrun", int_type);
+ append_composite_type_field (reason_type, "_timer", type);
+
+ /* _mesgq */
+ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
+ append_composite_type_field (type, "si_mqd", int_type);
+ append_composite_type_field (reason_type, "_mesgq", type);
+
+ /* _poll */
+ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
+ append_composite_type_field (type, "si_band", long_type);
+ append_composite_type_field (reason_type, "_poll", type);
+
+ /* __spare__ */
+ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
+ append_composite_type_field (type, "__spare1__", long_type);
+ append_composite_type_field (type, "__spare2__",
+ init_vector_type (int_type, 7));
+ append_composite_type_field (reason_type, "__spare__", type);
+
+ /* struct siginfo */
+ siginfo_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
+ TYPE_NAME (siginfo_type) = xstrdup ("siginfo");
+ append_composite_type_field (siginfo_type, "si_signo", int_type);
+ append_composite_type_field (siginfo_type, "si_errno", int_type);
+ append_composite_type_field (siginfo_type, "si_code", int_type);
+ append_composite_type_field (siginfo_type, "si_pid", pid_type);
+ append_composite_type_field (siginfo_type, "si_uid", uid_type);
+ append_composite_type_field (siginfo_type, "si_status", int_type);
+ append_composite_type_field (siginfo_type, "si_addr", void_ptr_type);
+ append_composite_type_field (siginfo_type, "si_value", sigval_type);
+ append_composite_type_field (siginfo_type, "_reason", reason_type);
+
+ fbsd_gdbarch_data->siginfo_type = siginfo_type;
+
+ return siginfo_type;
+}
+
/* Implement the "get_syscall_number" gdbarch method. */
static LONGEST
internal_error (__FILE__, __LINE__, _("fbsd_get_sycall_number called"));
}
-/* To be called from GDB_OSABI_FREEBSD_ELF handlers. */
+/* 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_core_xfer_siginfo (gdbarch, fbsd_core_xfer_siginfo);
set_gdbarch_make_corefile_notes (gdbarch, fbsd_make_corefile_notes);
set_gdbarch_print_auxv_entry (gdbarch, fbsd_print_auxv_entry);
+ set_gdbarch_get_siginfo_type (gdbarch, fbsd_get_siginfo_type);
/* `catch syscall' */
set_xml_syscall_file_name (gdbarch, "syscalls/freebsd.xml");
set_gdbarch_get_syscall_number (gdbarch, fbsd_get_syscall_number);
}
+
+void
+_initialize_fbsd_tdep (void)
+{
+ fbsd_gdbarch_data_handle =
+ gdbarch_data_register_post_init (init_fbsd_gdbarch_data);
+}
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