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binutils-gdb/gdb/fbsd-tdep.c
Andrew Burgess 95ce627aeb gdb: write target description into core file 
When a core file is created from within GDB add the target description
into a note within the core file.

When loading a core file, if the target description note is present
then load the target description from the core file.

The benefit of this is that we can be sure that, when analysing the
core file within GDB, that we are using the exact same target
description as was in use at the time the core file was created.

GDB already supports a mechanism for figuring out the target
description from a given corefile; gdbarch_core_read_description.
This new mechanism (GDB adding the target description) is not going to
replace the old mechanism.  Core files generated outside of GDB will
not include a target description, and so GDB still needs to be able to
figure out a target description for these files.

My primary motivation for adding this feature is that, in a future
commit, I will be adding support for bare metal core dumps on some
targets.  For RISC-V specifically, I want to be able to dump all the
available control status registers.  As different targets will present
different sets of register in their target description, including
registers that are possibly not otherwise known to GDB I wanted a way
to capture these registers in the core dump.

I therefore need a mechanism to write out an arbitrary set of
registers, and to then derive a target description from this arbitrary
set when later loading the core file.  The obvious approach (I think)
is to just reuse the target description.

Once I'd decided to add support for writing out the target description
I could either choose to make this RISC-V only, or make it generic.  I
figure that having the target description in the core file doesn't
hurt, and _might_ be helpful.  So that's how I got here, general
support for including the target description in GDB generated core
files.

In previous versions of this patch I added the target description from
generic code (in gcore.c).  However, doing this creates a dependency
between GDB's common code and bfd ELF support.  As ELF support in gdb
is optional (for example the target x86_64-apple-darwin20.3.0 does not
include ELF support) then having gcore.c require ELF support would
break the GDB build in some cases.

Instead, in this version of the patch, writing the target description
note is done from each specific targets make notes function.  Each of
these now calls a common function in gcore-elf.c (which is only linked
in when bfd has ELF support).  And so only targets that are ELF based
will call the new function and we can therefore avoid an unconditional
dependency on ELF support.

gdb/ChangeLog:

	* corelow.c: Add 'xml-tdesc.h' include.
	(core_target::read_description): Load the target description from
	the core file when possible.
	* fbsd-tdep.c (fbsd_make_corefile_notes): Add target description
	note.
	* gcore-elf.c: Add 'gdbsupport/tdesc.h' include.
	(gcore_elf_make_tdesc_note): New function.
	* gcore-elf.h (gcore_elf_make_tdesc_note): Declare.
	* linux-tdep.c (linux_make_corefile_notes): Add target description
	note.
2021-03-05 17:21:41 +00:00

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/* Target-dependent code for FreeBSD, architecture-independent.
Copyright (C) 2002-2021 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 "auxv.h"
#include "gdbcore.h"
#include "inferior.h"
#include "objfiles.h"
#include "regcache.h"
#include "regset.h"
#include "gdbthread.h"
#include "objfiles.h"
#include "xml-syscall.h"
#include <sys/socket.h>
#include <arpa/inet.h>
#include "elf-bfd.h"
#include "fbsd-tdep.h"
#include "gcore-elf.h"
/* This enum is derived from FreeBSD's <sys/signal.h>. */
enum
{
FREEBSD_SIGHUP = 1,
FREEBSD_SIGINT = 2,
FREEBSD_SIGQUIT = 3,
FREEBSD_SIGILL = 4,
FREEBSD_SIGTRAP = 5,
FREEBSD_SIGABRT = 6,
FREEBSD_SIGEMT = 7,
FREEBSD_SIGFPE = 8,
FREEBSD_SIGKILL = 9,
FREEBSD_SIGBUS = 10,
FREEBSD_SIGSEGV = 11,
FREEBSD_SIGSYS = 12,
FREEBSD_SIGPIPE = 13,
FREEBSD_SIGALRM = 14,
FREEBSD_SIGTERM = 15,
FREEBSD_SIGURG = 16,
FREEBSD_SIGSTOP = 17,
FREEBSD_SIGTSTP = 18,
FREEBSD_SIGCONT = 19,
FREEBSD_SIGCHLD = 20,
FREEBSD_SIGTTIN = 21,
FREEBSD_SIGTTOU = 22,
FREEBSD_SIGIO = 23,
FREEBSD_SIGXCPU = 24,
FREEBSD_SIGXFSZ = 25,
FREEBSD_SIGVTALRM = 26,
FREEBSD_SIGPROF = 27,
FREEBSD_SIGWINCH = 28,
FREEBSD_SIGINFO = 29,
FREEBSD_SIGUSR1 = 30,
FREEBSD_SIGUSR2 = 31,
FREEBSD_SIGTHR = 32,
FREEBSD_SIGLIBRT = 33,
FREEBSD_SIGRTMIN = 65,
FREEBSD_SIGRTMAX = 126,
};
/* 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
/* Offsets in data structure used in NT_FREEBSD_PROCSTAT_VMMAP core
dump notes. See <sys/user.h> for the definition of struct
kinfo_vmentry. This data structure should have the same layout on
all architectures.
Note that FreeBSD 7.0 used an older version of this structure
(struct kinfo_vmentry), but the NT_FREEBSD_PROCSTAT_VMMAP core
dump note wasn't introduced until FreeBSD 9.2. As a result, the
core dump note has always used the 7.1 and later structure
format. */
#define KVE_STRUCTSIZE 0x0
#define KVE_START 0x8
#define KVE_END 0x10
#define KVE_OFFSET 0x18
#define KVE_FLAGS 0x2c
#define KVE_PROTECTION 0x38
#define KVE_PATH 0x88
/* Flags in the 'kve_protection' field in struct kinfo_vmentry. These
match the KVME_PROT_* constants in <sys/user.h>. */
#define KINFO_VME_PROT_READ 0x00000001
#define KINFO_VME_PROT_WRITE 0x00000002
#define KINFO_VME_PROT_EXEC 0x00000004
/* Flags in the 'kve_flags' field in struct kinfo_vmentry. These
match the KVME_FLAG_* constants in <sys/user.h>. */
#define KINFO_VME_FLAG_COW 0x00000001
#define KINFO_VME_FLAG_NEEDS_COPY 0x00000002
#define KINFO_VME_FLAG_NOCOREDUMP 0x00000004
#define KINFO_VME_FLAG_SUPER 0x00000008
#define KINFO_VME_FLAG_GROWS_UP 0x00000010
#define KINFO_VME_FLAG_GROWS_DOWN 0x00000020
/* Offsets in data structure used in NT_FREEBSD_PROCSTAT_FILES core
dump notes. See <sys/user.h> for the definition of struct
kinfo_file. This data structure should have the same layout on all
architectures.
Note that FreeBSD 7.0 used an older version of this structure
(struct kinfo_ofile), but the NT_FREEBSD_PROCSTAT_FILES core dump
note wasn't introduced until FreeBSD 9.2. As a result, the core
dump note has always used the 7.1 and later structure format. */
#define KF_STRUCTSIZE 0x0
#define KF_TYPE 0x4
#define KF_FD 0x8
#define KF_FLAGS 0x10
#define KF_OFFSET 0x18
#define KF_VNODE_TYPE 0x20
#define KF_SOCK_DOMAIN 0x24
#define KF_SOCK_TYPE 0x28
#define KF_SOCK_PROTOCOL 0x2c
#define KF_SA_LOCAL 0x30
#define KF_SA_PEER 0xb0
#define KF_PATH 0x170
/* Constants for the 'kf_type' field in struct kinfo_file. These
match the KF_TYPE_* constants in <sys/user.h>. */
#define KINFO_FILE_TYPE_VNODE 1
#define KINFO_FILE_TYPE_SOCKET 2
#define KINFO_FILE_TYPE_PIPE 3
#define KINFO_FILE_TYPE_FIFO 4
#define KINFO_FILE_TYPE_KQUEUE 5
#define KINFO_FILE_TYPE_CRYPTO 6
#define KINFO_FILE_TYPE_MQUEUE 7
#define KINFO_FILE_TYPE_SHM 8
#define KINFO_FILE_TYPE_SEM 9
#define KINFO_FILE_TYPE_PTS 10
#define KINFO_FILE_TYPE_PROCDESC 11
/* Special values for the 'kf_fd' field in struct kinfo_file. These
match the KF_FD_TYPE_* constants in <sys/user.h>. */
#define KINFO_FILE_FD_TYPE_CWD -1
#define KINFO_FILE_FD_TYPE_ROOT -2
#define KINFO_FILE_FD_TYPE_JAIL -3
#define KINFO_FILE_FD_TYPE_TRACE -4
#define KINFO_FILE_FD_TYPE_TEXT -5
#define KINFO_FILE_FD_TYPE_CTTY -6
/* Flags in the 'kf_flags' field in struct kinfo_file. These match
the KF_FLAG_* constants in <sys/user.h>. */
#define KINFO_FILE_FLAG_READ 0x00000001
#define KINFO_FILE_FLAG_WRITE 0x00000002
#define KINFO_FILE_FLAG_APPEND 0x00000004
#define KINFO_FILE_FLAG_ASYNC 0x00000008
#define KINFO_FILE_FLAG_FSYNC 0x00000010
#define KINFO_FILE_FLAG_NONBLOCK 0x00000020
#define KINFO_FILE_FLAG_DIRECT 0x00000040
#define KINFO_FILE_FLAG_HASLOCK 0x00000080
#define KINFO_FILE_FLAG_EXEC 0x00004000
/* Constants for the 'kf_vnode_type' field in struct kinfo_file.
These match the KF_VTYPE_* constants in <sys/user.h>. */
#define KINFO_FILE_VTYPE_VREG 1
#define KINFO_FILE_VTYPE_VDIR 2
#define KINFO_FILE_VTYPE_VCHR 4
#define KINFO_FILE_VTYPE_VLNK 5
#define KINFO_FILE_VTYPE_VSOCK 6
#define KINFO_FILE_VTYPE_VFIFO 7
/* Constants for socket address families. These match AF_* constants
in <sys/socket.h>. */
#define FBSD_AF_UNIX 1
#define FBSD_AF_INET 2
#define FBSD_AF_INET6 28
/* Constants for socket types. These match SOCK_* constants in
<sys/socket.h>. */
#define FBSD_SOCK_STREAM 1
#define FBSD_SOCK_DGRAM 2
#define FBSD_SOCK_SEQPACKET 5
/* Constants for IP protocols. These match IPPROTO_* constants in
<netinet/in.h>. */
#define FBSD_IPPROTO_ICMP 1
#define FBSD_IPPROTO_TCP 6
#define FBSD_IPPROTO_UDP 17
#define FBSD_IPPROTO_SCTP 132
/* Socket address structures. These have the same layout on all
FreeBSD architectures. In addition, multibyte fields such as IP
addresses are always stored in network byte order. */
struct fbsd_sockaddr_in
{
uint8_t sin_len;
uint8_t sin_family;
uint8_t sin_port[2];
uint8_t sin_addr[4];
char sin_zero[8];
};
struct fbsd_sockaddr_in6
{
uint8_t sin6_len;
uint8_t sin6_family;
uint8_t sin6_port[2];
uint32_t sin6_flowinfo;
uint8_t sin6_addr[16];
uint32_t sin6_scope_id;
};
struct fbsd_sockaddr_un
{
uint8_t sun_len;
uint8_t sun_family;
char sun_path[104];
};
/* Number of 32-bit words in a signal set. This matches _SIG_WORDS in
<sys/_sigset.h> and is the same value on all architectures. */
#define SIG_WORDS 4
/* Offsets in data structure used in NT_FREEBSD_PROCSTAT_PROC core
dump notes. See <sys/user.h> for the definition of struct
kinfo_proc. This data structure has different layouts on different
architectures mostly due to ILP32 vs LP64. However, FreeBSD/i386
uses a 32-bit time_t while all other architectures use a 64-bit
time_t.
The core dump note actually contains one kinfo_proc structure for
each thread, but all of the process-wide data can be obtained from
the first structure. One result of this note's format is that some
of the process-wide status available in the native target method
from the kern.proc.pid.<pid> sysctl such as ki_stat and ki_siglist
is not available from a core dump. Instead, the per-thread data
structures contain the value of these fields for individual
threads. */
struct kinfo_proc_layout
{
/* Offsets of struct kinfo_proc members. */
int ki_layout;
int ki_pid;
int ki_ppid;
int ki_pgid;
int ki_tpgid;
int ki_sid;
int ki_tdev_freebsd11;
int ki_sigignore;
int ki_sigcatch;
int ki_uid;
int ki_ruid;
int ki_svuid;
int ki_rgid;
int ki_svgid;
int ki_ngroups;
int ki_groups;
int ki_size;
int ki_rssize;
int ki_tsize;
int ki_dsize;
int ki_ssize;
int ki_start;
int ki_nice;
int ki_comm;
int ki_tdev;
int ki_rusage;
int ki_rusage_ch;
/* Offsets of struct rusage members. */
int ru_utime;
int ru_stime;
int ru_maxrss;
int ru_minflt;
int ru_majflt;
};
const struct kinfo_proc_layout kinfo_proc_layout_32 =
{
.ki_layout = 0x4,
.ki_pid = 0x28,
.ki_ppid = 0x2c,
.ki_pgid = 0x30,
.ki_tpgid = 0x34,
.ki_sid = 0x38,
.ki_tdev_freebsd11 = 0x44,
.ki_sigignore = 0x68,
.ki_sigcatch = 0x78,
.ki_uid = 0x88,
.ki_ruid = 0x8c,
.ki_svuid = 0x90,
.ki_rgid = 0x94,
.ki_svgid = 0x98,
.ki_ngroups = 0x9c,
.ki_groups = 0xa0,
.ki_size = 0xe0,
.ki_rssize = 0xe4,
.ki_tsize = 0xec,
.ki_dsize = 0xf0,
.ki_ssize = 0xf4,
.ki_start = 0x118,
.ki_nice = 0x145,
.ki_comm = 0x17f,
.ki_tdev = 0x1f0,
.ki_rusage = 0x220,
.ki_rusage_ch = 0x278,
.ru_utime = 0x0,
.ru_stime = 0x10,
.ru_maxrss = 0x20,
.ru_minflt = 0x30,
.ru_majflt = 0x34,
};
const struct kinfo_proc_layout kinfo_proc_layout_i386 =
{
.ki_layout = 0x4,
.ki_pid = 0x28,
.ki_ppid = 0x2c,
.ki_pgid = 0x30,
.ki_tpgid = 0x34,
.ki_sid = 0x38,
.ki_tdev_freebsd11 = 0x44,
.ki_sigignore = 0x68,
.ki_sigcatch = 0x78,
.ki_uid = 0x88,
.ki_ruid = 0x8c,
.ki_svuid = 0x90,
.ki_rgid = 0x94,
.ki_svgid = 0x98,
.ki_ngroups = 0x9c,
.ki_groups = 0xa0,
.ki_size = 0xe0,
.ki_rssize = 0xe4,
.ki_tsize = 0xec,
.ki_dsize = 0xf0,
.ki_ssize = 0xf4,
.ki_start = 0x118,
.ki_nice = 0x135,
.ki_comm = 0x16f,
.ki_tdev = 0x1e0,
.ki_rusage = 0x210,
.ki_rusage_ch = 0x258,
.ru_utime = 0x0,
.ru_stime = 0x8,
.ru_maxrss = 0x10,
.ru_minflt = 0x20,
.ru_majflt = 0x24,
};
const struct kinfo_proc_layout kinfo_proc_layout_64 =
{
.ki_layout = 0x4,
.ki_pid = 0x48,
.ki_ppid = 0x4c,
.ki_pgid = 0x50,
.ki_tpgid = 0x54,
.ki_sid = 0x58,
.ki_tdev_freebsd11 = 0x64,
.ki_sigignore = 0x88,
.ki_sigcatch = 0x98,
.ki_uid = 0xa8,
.ki_ruid = 0xac,
.ki_svuid = 0xb0,
.ki_rgid = 0xb4,
.ki_svgid = 0xb8,
.ki_ngroups = 0xbc,
.ki_groups = 0xc0,
.ki_size = 0x100,
.ki_rssize = 0x108,
.ki_tsize = 0x118,
.ki_dsize = 0x120,
.ki_ssize = 0x128,
.ki_start = 0x150,
.ki_nice = 0x185,
.ki_comm = 0x1bf,
.ki_tdev = 0x230,
.ki_rusage = 0x260,
.ki_rusage_ch = 0x2f0,
.ru_utime = 0x0,
.ru_stime = 0x10,
.ru_maxrss = 0x20,
.ru_minflt = 0x40,
.ru_majflt = 0x48,
};
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));
}
struct fbsd_pspace_data
{
/* Offsets in the runtime linker's 'Obj_Entry' structure. */
LONGEST off_linkmap = 0;
LONGEST off_tlsindex = 0;
bool rtld_offsets_valid = false;
};
/* Per-program-space data for FreeBSD architectures. */
static const struct program_space_key<fbsd_pspace_data>
fbsd_pspace_data_handle;
static struct fbsd_pspace_data *
get_fbsd_pspace_data (struct program_space *pspace)
{
struct fbsd_pspace_data *data;
data = fbsd_pspace_data_handle.get (pspace);
if (data == NULL)
data = fbsd_pspace_data_handle.emplace (pspace);
return data;
}
/* This is how we want PTIDs from core files to be printed. */
static std::string
fbsd_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid)
{
if (ptid.lwp () != 0)
return string_printf ("LWP %ld", ptid.lwp ());
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;
if (thr->ptid.lwp () != 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. */
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 (section) > 0)
{
/* Truncate the name if it is longer than "buf". */
size = bfd_section_size (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;
}
/* 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)
{
if (info->suspend.stop_signal != GDB_SIGNAL_0
&& info->ptid.pid () == inferior_ptid.pid ())
return 1;
return 0;
}
/* 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
used in FreeBSD NT_PROCSTAT_* notes. */
static gdb::optional<gdb::byte_vector>
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);
if (!buf || buf->empty ())
return {};
if (structsize == 0)
return buf;
gdb::byte_vector desc (sizeof (structsize) + buf->size ());
memcpy (desc.data (), &structsize, sizeof (structsize));
memcpy (desc.data () + sizeof (structsize), buf->data (), buf->size ());
return desc;
}
/* Create appropriate note sections for a corefile, returning them in
allocated memory. */
static gdb::unique_xmalloc_ptr<char>
fbsd_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size)
{
gdb::unique_xmalloc_ptr<char> note_data;
Elf_Internal_Ehdr *i_ehdrp;
struct thread_info *curr_thr, *signalled_thr;
/* Put a "FreeBSD" label in the ELF header. */
i_ehdrp = elf_elfheader (obfd);
i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
gdb_assert (gdbarch_iterate_over_regset_sections_p (gdbarch));
if (get_exec_file (0))
{
const char *fname = lbasename (get_exec_file (0));
std::string psargs = fname;
const char *infargs = get_inferior_args ();
if (infargs != NULL)
psargs = psargs + " " + infargs;
note_data.reset (elfcore_write_prpsinfo (obfd, note_data.release (),
note_size, fname,
psargs.c_str ()));
}
/* 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.
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;
}
enum gdb_signal stop_signal = signalled_thr->suspend.stop_signal;
gcore_elf_build_thread_register_notes (gdbarch, signalled_thr, stop_signal,
obfd, &note_data, note_size);
for (thread_info *thr : current_inferior ()->non_exited_threads ())
{
if (thr == signalled_thr)
continue;
gcore_elf_build_thread_register_notes (gdbarch, thr, stop_signal,
obfd, &note_data, note_size);
}
/* 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.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;
}
/* Virtual memory mappings. */
note_desc = fbsd_make_note_desc (TARGET_OBJECT_FREEBSD_VMMAP, 0);
if (note_desc && !note_desc->empty ())
{
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.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, &note_data, note_size);
return note_data;
}
/* Helper function to generate the file descriptor description for a
single open file in 'info proc files'. */
static const char *
fbsd_file_fd (int kf_fd)
{
switch (kf_fd)
{
case KINFO_FILE_FD_TYPE_CWD:
return "cwd";
case KINFO_FILE_FD_TYPE_ROOT:
return "root";
case KINFO_FILE_FD_TYPE_JAIL:
return "jail";
case KINFO_FILE_FD_TYPE_TRACE:
return "trace";
case KINFO_FILE_FD_TYPE_TEXT:
return "text";
case KINFO_FILE_FD_TYPE_CTTY:
return "ctty";
default:
return int_string (kf_fd, 10, 1, 0, 0);
}
}
/* Helper function to generate the file type for a single open file in
'info proc files'. */
static const char *
fbsd_file_type (int kf_type, int kf_vnode_type)
{
switch (kf_type)
{
case KINFO_FILE_TYPE_VNODE:
switch (kf_vnode_type)
{
case KINFO_FILE_VTYPE_VREG:
return "file";
case KINFO_FILE_VTYPE_VDIR:
return "dir";
case KINFO_FILE_VTYPE_VCHR:
return "chr";
case KINFO_FILE_VTYPE_VLNK:
return "link";
case KINFO_FILE_VTYPE_VSOCK:
return "socket";
case KINFO_FILE_VTYPE_VFIFO:
return "fifo";
default:
{
char *str = get_print_cell ();
xsnprintf (str, PRINT_CELL_SIZE, "vn:%d", kf_vnode_type);
return str;
}
}
case KINFO_FILE_TYPE_SOCKET:
return "socket";
case KINFO_FILE_TYPE_PIPE:
return "pipe";
case KINFO_FILE_TYPE_FIFO:
return "fifo";
case KINFO_FILE_TYPE_KQUEUE:
return "kqueue";
case KINFO_FILE_TYPE_CRYPTO:
return "crypto";
case KINFO_FILE_TYPE_MQUEUE:
return "mqueue";
case KINFO_FILE_TYPE_SHM:
return "shm";
case KINFO_FILE_TYPE_SEM:
return "sem";
case KINFO_FILE_TYPE_PTS:
return "pts";
case KINFO_FILE_TYPE_PROCDESC:
return "proc";
default:
return int_string (kf_type, 10, 1, 0, 0);
}
}
/* Helper function to generate the file flags for a single open file in
'info proc files'. */
static const char *
fbsd_file_flags (int kf_flags)
{
static char file_flags[10];
file_flags[0] = (kf_flags & KINFO_FILE_FLAG_READ) ? 'r' : '-';
file_flags[1] = (kf_flags & KINFO_FILE_FLAG_WRITE) ? 'w' : '-';
file_flags[2] = (kf_flags & KINFO_FILE_FLAG_EXEC) ? 'x' : '-';
file_flags[3] = (kf_flags & KINFO_FILE_FLAG_APPEND) ? 'a' : '-';
file_flags[4] = (kf_flags & KINFO_FILE_FLAG_ASYNC) ? 's' : '-';
file_flags[5] = (kf_flags & KINFO_FILE_FLAG_FSYNC) ? 'f' : '-';
file_flags[6] = (kf_flags & KINFO_FILE_FLAG_NONBLOCK) ? 'n' : '-';
file_flags[7] = (kf_flags & KINFO_FILE_FLAG_DIRECT) ? 'd' : '-';
file_flags[8] = (kf_flags & KINFO_FILE_FLAG_HASLOCK) ? 'l' : '-';
file_flags[9] = '\0';
return file_flags;
}
/* Helper function to generate the name of an IP protocol. */
static const char *
fbsd_ipproto (int protocol)
{
switch (protocol)
{
case FBSD_IPPROTO_ICMP:
return "icmp";
case FBSD_IPPROTO_TCP:
return "tcp";
case FBSD_IPPROTO_UDP:
return "udp";
case FBSD_IPPROTO_SCTP:
return "sctp";
default:
{
char *str = get_print_cell ();
xsnprintf (str, PRINT_CELL_SIZE, "ip<%d>", protocol);
return str;
}
}
}
/* Helper function to print out an IPv4 socket address. */
static void
fbsd_print_sockaddr_in (const void *sockaddr)
{
const struct fbsd_sockaddr_in *sin =
reinterpret_cast<const struct fbsd_sockaddr_in *> (sockaddr);
char buf[INET_ADDRSTRLEN];
if (inet_ntop (AF_INET, sin->sin_addr, buf, sizeof buf) == nullptr)
error (_("Failed to format IPv4 address"));
printf_filtered ("%s:%u", buf,
(sin->sin_port[0] << 8) | sin->sin_port[1]);
}
/* Helper function to print out an IPv6 socket address. */
static void
fbsd_print_sockaddr_in6 (const void *sockaddr)
{
const struct fbsd_sockaddr_in6 *sin6 =
reinterpret_cast<const struct fbsd_sockaddr_in6 *> (sockaddr);
char buf[INET6_ADDRSTRLEN];
if (inet_ntop (AF_INET6, sin6->sin6_addr, buf, sizeof buf) == nullptr)
error (_("Failed to format IPv6 address"));
printf_filtered ("%s.%u", buf,
(sin6->sin6_port[0] << 8) | sin6->sin6_port[1]);
}
/* See fbsd-tdep.h. */
void
fbsd_info_proc_files_header ()
{
printf_filtered (_("Open files:\n\n"));
printf_filtered (" %6s %6s %10s %9s %s\n",
"FD", "Type", "Offset", "Flags ", "Name");
}
/* See fbsd-tdep.h. */
void
fbsd_info_proc_files_entry (int kf_type, int kf_fd, int kf_flags,
LONGEST kf_offset, int kf_vnode_type,
int kf_sock_domain, int kf_sock_type,
int kf_sock_protocol, const void *kf_sa_local,
const void *kf_sa_peer, const void *kf_path)
{
printf_filtered (" %6s %6s %10s %8s ",
fbsd_file_fd (kf_fd),
fbsd_file_type (kf_type, kf_vnode_type),
kf_offset > -1 ? hex_string (kf_offset) : "-",
fbsd_file_flags (kf_flags));
if (kf_type == KINFO_FILE_TYPE_SOCKET)
{
switch (kf_sock_domain)
{
case FBSD_AF_UNIX:
{
switch (kf_sock_type)
{
case FBSD_SOCK_STREAM:
printf_filtered ("unix stream:");
break;
case FBSD_SOCK_DGRAM:
printf_filtered ("unix dgram:");
break;
case FBSD_SOCK_SEQPACKET:
printf_filtered ("unix seqpacket:");
break;
default:
printf_filtered ("unix <%d>:", kf_sock_type);
break;
}
/* For local sockets, print out the first non-nul path
rather than both paths. */
const struct fbsd_sockaddr_un *saddr_un
= reinterpret_cast<const struct fbsd_sockaddr_un *> (kf_sa_local);
if (saddr_un->sun_path[0] == 0)
saddr_un = reinterpret_cast<const struct fbsd_sockaddr_un *>
(kf_sa_peer);
printf_filtered ("%s", saddr_un->sun_path);
break;
}
case FBSD_AF_INET:
printf_filtered ("%s4 ", fbsd_ipproto (kf_sock_protocol));
fbsd_print_sockaddr_in (kf_sa_local);
printf_filtered (" -> ");
fbsd_print_sockaddr_in (kf_sa_peer);
break;
case FBSD_AF_INET6:
printf_filtered ("%s6 ", fbsd_ipproto (kf_sock_protocol));
fbsd_print_sockaddr_in6 (kf_sa_local);
printf_filtered (" -> ");
fbsd_print_sockaddr_in6 (kf_sa_peer);
break;
}
}
else
printf_filtered ("%s", reinterpret_cast<const char *> (kf_path));
printf_filtered ("\n");
}
/* Implement "info proc files" for a corefile. */
static void
fbsd_core_info_proc_files (struct gdbarch *gdbarch)
{
asection *section
= bfd_get_section_by_name (core_bfd, ".note.freebsdcore.files");
if (section == NULL)
{
warning (_("unable to find open files in core file"));
return;
}
size_t note_size = bfd_section_size (section);
if (note_size < 4)
error (_("malformed core note - too short for header"));
gdb::def_vector<unsigned char> contents (note_size);
if (!bfd_get_section_contents (core_bfd, section, contents.data (),
0, note_size))
error (_("could not get core note contents"));
unsigned char *descdata = contents.data ();
unsigned char *descend = descdata + note_size;
/* Skip over the structure size. */
descdata += 4;
fbsd_info_proc_files_header ();
while (descdata + KF_PATH < descend)
{
ULONGEST structsize = bfd_get_32 (core_bfd, descdata + KF_STRUCTSIZE);
if (structsize < KF_PATH)
error (_("malformed core note - file structure too small"));
LONGEST type = bfd_get_signed_32 (core_bfd, descdata + KF_TYPE);
LONGEST fd = bfd_get_signed_32 (core_bfd, descdata + KF_FD);
LONGEST flags = bfd_get_signed_32 (core_bfd, descdata + KF_FLAGS);
LONGEST offset = bfd_get_signed_64 (core_bfd, descdata + KF_OFFSET);
LONGEST vnode_type = bfd_get_signed_32 (core_bfd,
descdata + KF_VNODE_TYPE);
LONGEST sock_domain = bfd_get_signed_32 (core_bfd,
descdata + KF_SOCK_DOMAIN);
LONGEST sock_type = bfd_get_signed_32 (core_bfd, descdata + KF_SOCK_TYPE);
LONGEST sock_protocol = bfd_get_signed_32 (core_bfd,
descdata + KF_SOCK_PROTOCOL);
fbsd_info_proc_files_entry (type, fd, flags, offset, vnode_type,
sock_domain, sock_type, sock_protocol,
descdata + KF_SA_LOCAL, descdata + KF_SA_PEER,
descdata + KF_PATH);
descdata += structsize;
}
}
/* Helper function to generate mappings flags for a single VM map
entry in 'info proc mappings'. */
static const char *
fbsd_vm_map_entry_flags (int kve_flags, int kve_protection)
{
static char vm_flags[9];
vm_flags[0] = (kve_protection & KINFO_VME_PROT_READ) ? 'r' : '-';
vm_flags[1] = (kve_protection & KINFO_VME_PROT_WRITE) ? 'w' : '-';
vm_flags[2] = (kve_protection & KINFO_VME_PROT_EXEC) ? 'x' : '-';
vm_flags[3] = ' ';
vm_flags[4] = (kve_flags & KINFO_VME_FLAG_COW) ? 'C' : '-';
vm_flags[5] = (kve_flags & KINFO_VME_FLAG_NEEDS_COPY) ? 'N' : '-';
vm_flags[6] = (kve_flags & KINFO_VME_FLAG_SUPER) ? 'S' : '-';
vm_flags[7] = (kve_flags & KINFO_VME_FLAG_GROWS_UP) ? 'U'
: (kve_flags & KINFO_VME_FLAG_GROWS_DOWN) ? 'D' : '-';
vm_flags[8] = '\0';
return vm_flags;
}
/* See fbsd-tdep.h. */
void
fbsd_info_proc_mappings_header (int addr_bit)
{
printf_filtered (_("Mapped address spaces:\n\n"));
if (addr_bit == 64)
{
printf_filtered (" %18s %18s %10s %10s %9s %s\n",
"Start Addr",
" End Addr",
" Size", " Offset", "Flags ", "File");
}
else
{
printf_filtered ("\t%10s %10s %10s %10s %9s %s\n",
"Start Addr",
" End Addr",
" Size", " Offset", "Flags ", "File");
}
}
/* See fbsd-tdep.h. */
void
fbsd_info_proc_mappings_entry (int addr_bit, ULONGEST kve_start,
ULONGEST kve_end, ULONGEST kve_offset,
int kve_flags, int kve_protection,
const void *kve_path)
{
if (addr_bit == 64)
{
printf_filtered (" %18s %18s %10s %10s %9s %s\n",
hex_string (kve_start),
hex_string (kve_end),
hex_string (kve_end - kve_start),
hex_string (kve_offset),
fbsd_vm_map_entry_flags (kve_flags, kve_protection),
reinterpret_cast<const char *> (kve_path));
}
else
{
printf_filtered ("\t%10s %10s %10s %10s %9s %s\n",
hex_string (kve_start),
hex_string (kve_end),
hex_string (kve_end - kve_start),
hex_string (kve_offset),
fbsd_vm_map_entry_flags (kve_flags, kve_protection),
reinterpret_cast<const char *> (kve_path));
}
}
/* Implement "info proc mappings" for a corefile. */
static void
fbsd_core_info_proc_mappings (struct gdbarch *gdbarch)
{
asection *section;
unsigned char *descdata, *descend;
size_t note_size;
section = bfd_get_section_by_name (core_bfd, ".note.freebsdcore.vmmap");
if (section == NULL)
{
warning (_("unable to find mappings in core file"));
return;
}
note_size = bfd_section_size (section);
if (note_size < 4)
error (_("malformed core note - too short for header"));
gdb::def_vector<unsigned char> contents (note_size);
if (!bfd_get_section_contents (core_bfd, section, contents.data (),
0, note_size))
error (_("could not get core note contents"));
descdata = contents.data ();
descend = descdata + note_size;
/* Skip over the structure size. */
descdata += 4;
fbsd_info_proc_mappings_header (gdbarch_addr_bit (gdbarch));
while (descdata + KVE_PATH < descend)
{
ULONGEST structsize = bfd_get_32 (core_bfd, descdata + KVE_STRUCTSIZE);
if (structsize < KVE_PATH)
error (_("malformed core note - vmmap entry too small"));
ULONGEST start = bfd_get_64 (core_bfd, descdata + KVE_START);
ULONGEST end = bfd_get_64 (core_bfd, descdata + KVE_END);
ULONGEST offset = bfd_get_64 (core_bfd, descdata + KVE_OFFSET);
LONGEST flags = bfd_get_signed_32 (core_bfd, descdata + KVE_FLAGS);
LONGEST prot = bfd_get_signed_32 (core_bfd, descdata + KVE_PROTECTION);
fbsd_info_proc_mappings_entry (gdbarch_addr_bit (gdbarch), start, end,
offset, flags, prot, descdata + KVE_PATH);
descdata += structsize;
}
}
/* Fetch the pathname of a vnode for a single file descriptor from the
file table core note. */
static gdb::unique_xmalloc_ptr<char>
fbsd_core_vnode_path (struct gdbarch *gdbarch, int fd)
{
asection *section;
unsigned char *descdata, *descend;
size_t note_size;
section = bfd_get_section_by_name (core_bfd, ".note.freebsdcore.files");
if (section == NULL)
return nullptr;
note_size = bfd_section_size (section);
if (note_size < 4)
error (_("malformed core note - too short for header"));
gdb::def_vector<unsigned char> contents (note_size);
if (!bfd_get_section_contents (core_bfd, section, contents.data (),
0, note_size))
error (_("could not get core note contents"));
descdata = contents.data ();
descend = descdata + note_size;
/* Skip over the structure size. */
descdata += 4;
while (descdata + KF_PATH < descend)
{
ULONGEST structsize;
structsize = bfd_get_32 (core_bfd, descdata + KF_STRUCTSIZE);
if (structsize < KF_PATH)
error (_("malformed core note - file structure too small"));
if (bfd_get_32 (core_bfd, descdata + KF_TYPE) == KINFO_FILE_TYPE_VNODE
&& bfd_get_signed_32 (core_bfd, descdata + KF_FD) == fd)
{
char *path = (char *) descdata + KF_PATH;
return make_unique_xstrdup (path);
}
descdata += structsize;
}
return nullptr;
}
/* Helper function to read a struct timeval. */
static void
fbsd_core_fetch_timeval (struct gdbarch *gdbarch, unsigned char *data,
LONGEST &sec, ULONGEST &usec)
{
if (gdbarch_addr_bit (gdbarch) == 64)
{
sec = bfd_get_signed_64 (core_bfd, data);
usec = bfd_get_64 (core_bfd, data + 8);
}
else if (bfd_get_arch (core_bfd) == bfd_arch_i386)
{
sec = bfd_get_signed_32 (core_bfd, data);
usec = bfd_get_32 (core_bfd, data + 4);
}
else
{
sec = bfd_get_signed_64 (core_bfd, data);
usec = bfd_get_32 (core_bfd, data + 8);
}
}
/* Print out the contents of a signal set. */
static void
fbsd_print_sigset (const char *descr, unsigned char *sigset)
{
printf_filtered ("%s: ", descr);
for (int i = 0; i < SIG_WORDS; i++)
printf_filtered ("%08x ",
(unsigned int) bfd_get_32 (core_bfd, sigset + i * 4));
printf_filtered ("\n");
}
/* Implement "info proc status" for a corefile. */
static void
fbsd_core_info_proc_status (struct gdbarch *gdbarch)
{
const struct kinfo_proc_layout *kp;
asection *section;
unsigned char *descdata;
int addr_bit, long_bit;
size_t note_size;
ULONGEST value;
LONGEST sec;
section = bfd_get_section_by_name (core_bfd, ".note.freebsdcore.proc");
if (section == NULL)
{
warning (_("unable to find process info in core file"));
return;
}
addr_bit = gdbarch_addr_bit (gdbarch);
if (addr_bit == 64)
kp = &kinfo_proc_layout_64;
else if (bfd_get_arch (core_bfd) == bfd_arch_i386)
kp = &kinfo_proc_layout_i386;
else
kp = &kinfo_proc_layout_32;
long_bit = gdbarch_long_bit (gdbarch);
/*
* Ensure that the note is large enough for all of the fields fetched
* by this function. In particular, the note must contain the 32-bit
* structure size, then it must be long enough to access the last
* field used (ki_rusage_ch.ru_majflt) which is the size of a long.
*/
note_size = bfd_section_size (section);
if (note_size < (4 + kp->ki_rusage_ch + kp->ru_majflt
+ long_bit / TARGET_CHAR_BIT))
error (_("malformed core note - too short"));
gdb::def_vector<unsigned char> contents (note_size);
if (!bfd_get_section_contents (core_bfd, section, contents.data (),
0, note_size))
error (_("could not get core note contents"));
descdata = contents.data ();
/* Skip over the structure size. */
descdata += 4;
/* Verify 'ki_layout' is 0. */
if (bfd_get_32 (core_bfd, descdata + kp->ki_layout) != 0)
{
warning (_("unsupported process information in core file"));
return;
}
printf_filtered ("Name: %.19s\n", descdata + kp->ki_comm);
printf_filtered ("Process ID: %s\n",
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_pid)));
printf_filtered ("Parent process: %s\n",
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_ppid)));
printf_filtered ("Process group: %s\n",
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_pgid)));
printf_filtered ("Session id: %s\n",
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_sid)));
/* FreeBSD 12.0 and later store a 64-bit dev_t at 'ki_tdev'. Older
kernels store a 32-bit dev_t at 'ki_tdev_freebsd11'. In older
kernels the 64-bit 'ki_tdev' field is in a reserved section of
the structure that is cleared to zero. Assume that a zero value
in ki_tdev indicates a core dump from an older kernel and use the
value in 'ki_tdev_freebsd11' instead. */
value = bfd_get_64 (core_bfd, descdata + kp->ki_tdev);
if (value == 0)
value = bfd_get_32 (core_bfd, descdata + kp->ki_tdev_freebsd11);
printf_filtered ("TTY: %s\n", pulongest (value));
printf_filtered ("TTY owner process group: %s\n",
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_tpgid)));
printf_filtered ("User IDs (real, effective, saved): %s %s %s\n",
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_ruid)),
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_uid)),
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_svuid)));
printf_filtered ("Group IDs (real, effective, saved): %s %s %s\n",
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_rgid)),
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_groups)),
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_svgid)));
printf_filtered ("Groups: ");
uint16_t ngroups = bfd_get_16 (core_bfd, descdata + kp->ki_ngroups);
for (int i = 0; i < ngroups; i++)
printf_filtered ("%s ",
pulongest (bfd_get_32 (core_bfd,
descdata + kp->ki_groups + i * 4)));
printf_filtered ("\n");
value = bfd_get (long_bit, core_bfd,
descdata + kp->ki_rusage + kp->ru_minflt);
printf_filtered ("Minor faults (no memory page): %s\n", pulongest (value));
value = bfd_get (long_bit, core_bfd,
descdata + kp->ki_rusage_ch + kp->ru_minflt);
printf_filtered ("Minor faults, children: %s\n", pulongest (value));
value = bfd_get (long_bit, core_bfd,
descdata + kp->ki_rusage + kp->ru_majflt);
printf_filtered ("Major faults (memory page faults): %s\n",
pulongest (value));
value = bfd_get (long_bit, core_bfd,
descdata + kp->ki_rusage_ch + kp->ru_majflt);
printf_filtered ("Major faults, children: %s\n", pulongest (value));
fbsd_core_fetch_timeval (gdbarch,
descdata + kp->ki_rusage + kp->ru_utime,
sec, value);
printf_filtered ("utime: %s.%06d\n", plongest (sec), (int) value);
fbsd_core_fetch_timeval (gdbarch,
descdata + kp->ki_rusage + kp->ru_stime,
sec, value);
printf_filtered ("stime: %s.%06d\n", plongest (sec), (int) value);
fbsd_core_fetch_timeval (gdbarch,
descdata + kp->ki_rusage_ch + kp->ru_utime,
sec, value);
printf_filtered ("utime, children: %s.%06d\n", plongest (sec), (int) value);
fbsd_core_fetch_timeval (gdbarch,
descdata + kp->ki_rusage_ch + kp->ru_stime,
sec, value);
printf_filtered ("stime, children: %s.%06d\n", plongest (sec), (int) value);
printf_filtered ("'nice' value: %d\n",
(int) bfd_get_signed_8 (core_bfd, descdata + kp->ki_nice));
fbsd_core_fetch_timeval (gdbarch, descdata + kp->ki_start, sec, value);
printf_filtered ("Start time: %s.%06d\n", plongest (sec), (int) value);
printf_filtered ("Virtual memory size: %s kB\n",
pulongest (bfd_get (addr_bit, core_bfd,
descdata + kp->ki_size) / 1024));
printf_filtered ("Data size: %s pages\n",
pulongest (bfd_get (addr_bit, core_bfd,
descdata + kp->ki_dsize)));
printf_filtered ("Stack size: %s pages\n",
pulongest (bfd_get (addr_bit, core_bfd,
descdata + kp->ki_ssize)));
printf_filtered ("Text size: %s pages\n",
pulongest (bfd_get (addr_bit, core_bfd,
descdata + kp->ki_tsize)));
printf_filtered ("Resident set size: %s pages\n",
pulongest (bfd_get (addr_bit, core_bfd,
descdata + kp->ki_rssize)));
printf_filtered ("Maximum RSS: %s pages\n",
pulongest (bfd_get (long_bit, core_bfd,
descdata + kp->ki_rusage
+ kp->ru_maxrss)));
fbsd_print_sigset ("Ignored Signals", descdata + kp->ki_sigignore);
fbsd_print_sigset ("Caught Signals", descdata + kp->ki_sigcatch);
}
/* Implement the "core_info_proc" gdbarch method. */
static void
fbsd_core_info_proc (struct gdbarch *gdbarch, const char *args,
enum info_proc_what what)
{
bool do_cmdline = false;
bool do_cwd = false;
bool do_exe = false;
bool do_files = false;
bool do_mappings = false;
bool do_status = false;
int pid;
switch (what)
{
case IP_MINIMAL:
do_cmdline = true;
do_cwd = true;
do_exe = true;
break;
case IP_MAPPINGS:
do_mappings = true;
break;
case IP_STATUS:
case IP_STAT:
do_status = true;
break;
case IP_CMDLINE:
do_cmdline = true;
break;
case IP_EXE:
do_exe = true;
break;
case IP_CWD:
do_cwd = true;
break;
case IP_FILES:
do_files = true;
break;
case IP_ALL:
do_cmdline = true;
do_cwd = true;
do_exe = true;
do_files = true;
do_mappings = true;
do_status = true;
break;
default:
return;
}
pid = bfd_core_file_pid (core_bfd);
if (pid != 0)
printf_filtered (_("process %d\n"), pid);
if (do_cmdline)
{
const char *cmdline;
cmdline = bfd_core_file_failing_command (core_bfd);
if (cmdline)
printf_filtered ("cmdline = '%s'\n", cmdline);
else
warning (_("Command line unavailable"));
}
if (do_cwd)
{
gdb::unique_xmalloc_ptr<char> cwd =
fbsd_core_vnode_path (gdbarch, KINFO_FILE_FD_TYPE_CWD);
if (cwd)
printf_filtered ("cwd = '%s'\n", cwd.get ());
else
warning (_("unable to read current working directory"));
}
if (do_exe)
{
gdb::unique_xmalloc_ptr<char> exe =
fbsd_core_vnode_path (gdbarch, KINFO_FILE_FD_TYPE_TEXT);
if (exe)
printf_filtered ("exe = '%s'\n", exe.get ());
else
warning (_("unable to read executable path name"));
}
if (do_files)
fbsd_core_info_proc_files (gdbarch);
if (do_mappings)
fbsd_core_info_proc_mappings (gdbarch);
if (do_status)
fbsd_core_info_proc_status (gdbarch);
}
/* 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 = AUXV_FORMAT_HEX;
switch (type)
{
case AT_NULL:
case AT_IGNORE:
case AT_EXECFD:
case AT_PHDR:
case AT_PHENT:
case AT_PHNUM:
case AT_PAGESZ:
case AT_BASE:
case AT_FLAGS:
case AT_ENTRY:
case AT_NOTELF:
case AT_UID:
case AT_EUID:
case AT_GID:
case AT_EGID:
default_print_auxv_entry (gdbarch, file, type, val);
return;
#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);
TAG (EHDRFLAGS, _("ELF header e_flags"), AUXV_FORMAT_HEX);
TAG (HWCAP, _("Machine-dependent CPU capability hints"), AUXV_FORMAT_HEX);
TAG (HWCAP2, _("Extension of AT_HWCAP"), AUXV_FORMAT_HEX);
TAG (BSDFLAGS, _("ELF BSD flags"), AUXV_FORMAT_HEX);
TAG (ARGC, _("Argument count"), AUXV_FORMAT_DEC);
TAG (ARGV, _("Argument vector"), AUXV_FORMAT_HEX);
TAG (ENVC, _("Environment count"), AUXV_FORMAT_DEC);
TAG (ENVV, _("Environment vector"), AUXV_FORMAT_HEX);
TAG (PS_STRINGS, _("Pointer to ps_strings"), AUXV_FORMAT_HEX);
}
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);
sigval_type->set_name (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;
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;
pid_type->set_target_is_stub (true);
/* _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);
siginfo_type->set_name (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 "gdb_signal_from_target" gdbarch method. */
static enum gdb_signal
fbsd_gdb_signal_from_target (struct gdbarch *gdbarch, int signal)
{
switch (signal)
{
case 0:
return GDB_SIGNAL_0;
case FREEBSD_SIGHUP:
return GDB_SIGNAL_HUP;
case FREEBSD_SIGINT:
return GDB_SIGNAL_INT;
case FREEBSD_SIGQUIT:
return GDB_SIGNAL_QUIT;
case FREEBSD_SIGILL:
return GDB_SIGNAL_ILL;
case FREEBSD_SIGTRAP:
return GDB_SIGNAL_TRAP;
case FREEBSD_SIGABRT:
return GDB_SIGNAL_ABRT;
case FREEBSD_SIGEMT:
return GDB_SIGNAL_EMT;
case FREEBSD_SIGFPE:
return GDB_SIGNAL_FPE;
case FREEBSD_SIGKILL:
return GDB_SIGNAL_KILL;
case FREEBSD_SIGBUS:
return GDB_SIGNAL_BUS;
case FREEBSD_SIGSEGV:
return GDB_SIGNAL_SEGV;
case FREEBSD_SIGSYS:
return GDB_SIGNAL_SYS;
case FREEBSD_SIGPIPE:
return GDB_SIGNAL_PIPE;
case FREEBSD_SIGALRM:
return GDB_SIGNAL_ALRM;
case FREEBSD_SIGTERM:
return GDB_SIGNAL_TERM;
case FREEBSD_SIGURG:
return GDB_SIGNAL_URG;
case FREEBSD_SIGSTOP:
return GDB_SIGNAL_STOP;
case FREEBSD_SIGTSTP:
return GDB_SIGNAL_TSTP;
case FREEBSD_SIGCONT:
return GDB_SIGNAL_CONT;
case FREEBSD_SIGCHLD:
return GDB_SIGNAL_CHLD;
case FREEBSD_SIGTTIN:
return GDB_SIGNAL_TTIN;
case FREEBSD_SIGTTOU:
return GDB_SIGNAL_TTOU;
case FREEBSD_SIGIO:
return GDB_SIGNAL_IO;
case FREEBSD_SIGXCPU:
return GDB_SIGNAL_XCPU;
case FREEBSD_SIGXFSZ:
return GDB_SIGNAL_XFSZ;
case FREEBSD_SIGVTALRM:
return GDB_SIGNAL_VTALRM;
case FREEBSD_SIGPROF:
return GDB_SIGNAL_PROF;
case FREEBSD_SIGWINCH:
return GDB_SIGNAL_WINCH;
case FREEBSD_SIGINFO:
return GDB_SIGNAL_INFO;
case FREEBSD_SIGUSR1:
return GDB_SIGNAL_USR1;
case FREEBSD_SIGUSR2:
return GDB_SIGNAL_USR2;
/* SIGTHR is the same as SIGLWP on FreeBSD. */
case FREEBSD_SIGTHR:
return GDB_SIGNAL_LWP;
case FREEBSD_SIGLIBRT:
return GDB_SIGNAL_LIBRT;
}
if (signal >= FREEBSD_SIGRTMIN && signal <= FREEBSD_SIGRTMAX)
{
int offset = signal - FREEBSD_SIGRTMIN;
return (enum gdb_signal) ((int) GDB_SIGNAL_REALTIME_65 + offset);
}
return GDB_SIGNAL_UNKNOWN;
}
/* Implement the "gdb_signal_to_target" gdbarch method. */
static int
fbsd_gdb_signal_to_target (struct gdbarch *gdbarch,
enum gdb_signal signal)
{
switch (signal)
{
case GDB_SIGNAL_0:
return 0;
case GDB_SIGNAL_HUP:
return FREEBSD_SIGHUP;
case GDB_SIGNAL_INT:
return FREEBSD_SIGINT;
case GDB_SIGNAL_QUIT:
return FREEBSD_SIGQUIT;
case GDB_SIGNAL_ILL:
return FREEBSD_SIGILL;
case GDB_SIGNAL_TRAP:
return FREEBSD_SIGTRAP;
case GDB_SIGNAL_ABRT:
return FREEBSD_SIGABRT;
case GDB_SIGNAL_EMT:
return FREEBSD_SIGEMT;
case GDB_SIGNAL_FPE:
return FREEBSD_SIGFPE;
case GDB_SIGNAL_KILL:
return FREEBSD_SIGKILL;
case GDB_SIGNAL_BUS:
return FREEBSD_SIGBUS;
case GDB_SIGNAL_SEGV:
return FREEBSD_SIGSEGV;
case GDB_SIGNAL_SYS:
return FREEBSD_SIGSYS;
case GDB_SIGNAL_PIPE:
return FREEBSD_SIGPIPE;
case GDB_SIGNAL_ALRM:
return FREEBSD_SIGALRM;
case GDB_SIGNAL_TERM:
return FREEBSD_SIGTERM;
case GDB_SIGNAL_URG:
return FREEBSD_SIGURG;
case GDB_SIGNAL_STOP:
return FREEBSD_SIGSTOP;
case GDB_SIGNAL_TSTP:
return FREEBSD_SIGTSTP;
case GDB_SIGNAL_CONT:
return FREEBSD_SIGCONT;
case GDB_SIGNAL_CHLD:
return FREEBSD_SIGCHLD;
case GDB_SIGNAL_TTIN:
return FREEBSD_SIGTTIN;
case GDB_SIGNAL_TTOU:
return FREEBSD_SIGTTOU;
case GDB_SIGNAL_IO:
return FREEBSD_SIGIO;
case GDB_SIGNAL_XCPU:
return FREEBSD_SIGXCPU;
case GDB_SIGNAL_XFSZ:
return FREEBSD_SIGXFSZ;
case GDB_SIGNAL_VTALRM:
return FREEBSD_SIGVTALRM;
case GDB_SIGNAL_PROF:
return FREEBSD_SIGPROF;
case GDB_SIGNAL_WINCH:
return FREEBSD_SIGWINCH;
case GDB_SIGNAL_INFO:
return FREEBSD_SIGINFO;
case GDB_SIGNAL_USR1:
return FREEBSD_SIGUSR1;
case GDB_SIGNAL_USR2:
return FREEBSD_SIGUSR2;
case GDB_SIGNAL_LWP:
return FREEBSD_SIGTHR;
case GDB_SIGNAL_LIBRT:
return FREEBSD_SIGLIBRT;
}
if (signal >= GDB_SIGNAL_REALTIME_65
&& signal <= GDB_SIGNAL_REALTIME_126)
{
int offset = signal - GDB_SIGNAL_REALTIME_65;
return FREEBSD_SIGRTMIN + offset;
}
return -1;
}
/* Implement the "get_syscall_number" gdbarch method. */
static LONGEST
fbsd_get_syscall_number (struct gdbarch *gdbarch, thread_info *thread)
{
/* 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"));
}
/* Read an integer symbol value from the current target. */
static LONGEST
fbsd_read_integer_by_name (struct gdbarch *gdbarch, const char *name)
{
bound_minimal_symbol ms = lookup_minimal_symbol (name, NULL, NULL);
if (ms.minsym == NULL)
error (_("Unable to resolve symbol '%s'"), name);
gdb_byte buf[4];
if (target_read_memory (BMSYMBOL_VALUE_ADDRESS (ms), buf, sizeof buf) != 0)
error (_("Unable to read value of '%s'"), name);
return extract_signed_integer (buf, sizeof buf, gdbarch_byte_order (gdbarch));
}
/* Lookup offsets of fields in the runtime linker's 'Obj_Entry'
structure needed to determine the TLS index of an object file. */
static void
fbsd_fetch_rtld_offsets (struct gdbarch *gdbarch, struct fbsd_pspace_data *data)
{
try
{
/* Fetch offsets from debug symbols in rtld. */
struct symbol *obj_entry_sym
= lookup_symbol_in_language ("Struct_Obj_Entry", NULL, STRUCT_DOMAIN,
language_c, NULL).symbol;
if (obj_entry_sym == NULL)
error (_("Unable to find Struct_Obj_Entry symbol"));
data->off_linkmap = lookup_struct_elt (SYMBOL_TYPE (obj_entry_sym),
"linkmap", 0).offset / 8;
data->off_tlsindex = lookup_struct_elt (SYMBOL_TYPE (obj_entry_sym),
"tlsindex", 0).offset / 8;
data->rtld_offsets_valid = true;
return;
}
catch (const gdb_exception_error &e)
{
data->off_linkmap = -1;
}
try
{
/* Fetch offsets from global variables in libthr. Note that
this does not work for single-threaded processes that are not
linked against libthr. */
data->off_linkmap = fbsd_read_integer_by_name (gdbarch,
"_thread_off_linkmap");
data->off_tlsindex = fbsd_read_integer_by_name (gdbarch,
"_thread_off_tlsindex");
data->rtld_offsets_valid = true;
return;
}
catch (const gdb_exception_error &e)
{
data->off_linkmap = -1;
}
}
/* Helper function to read the TLS index of an object file associated
with a link map entry at LM_ADDR. */
static LONGEST
fbsd_get_tls_index (struct gdbarch *gdbarch, CORE_ADDR lm_addr)
{
struct fbsd_pspace_data *data = get_fbsd_pspace_data (current_program_space);
if (!data->rtld_offsets_valid)
fbsd_fetch_rtld_offsets (gdbarch, data);
if (data->off_linkmap == -1)
throw_error (TLS_GENERIC_ERROR,
_("Cannot fetch runtime linker structure offsets"));
/* Simulate container_of to convert from LM_ADDR to the Obj_Entry
pointer and then compute the offset of the tlsindex member. */
CORE_ADDR tlsindex_addr = lm_addr - data->off_linkmap + data->off_tlsindex;
gdb_byte buf[4];
if (target_read_memory (tlsindex_addr, buf, sizeof buf) != 0)
throw_error (TLS_GENERIC_ERROR,
_("Cannot find thread-local variables on this target"));
return extract_signed_integer (buf, sizeof buf, gdbarch_byte_order (gdbarch));
}
/* See fbsd-tdep.h. */
CORE_ADDR
fbsd_get_thread_local_address (struct gdbarch *gdbarch, CORE_ADDR dtv_addr,
CORE_ADDR lm_addr, CORE_ADDR offset)
{
LONGEST tls_index = fbsd_get_tls_index (gdbarch, lm_addr);
gdb_byte buf[gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT];
if (target_read_memory (dtv_addr, buf, sizeof buf) != 0)
throw_error (TLS_GENERIC_ERROR,
_("Cannot find thread-local variables on this target"));
const struct builtin_type *builtin = builtin_type (gdbarch);
CORE_ADDR addr = gdbarch_pointer_to_address (gdbarch,
builtin->builtin_data_ptr, buf);
addr += (tls_index + 1) * TYPE_LENGTH (builtin->builtin_data_ptr);
if (target_read_memory (addr, buf, sizeof buf) != 0)
throw_error (TLS_GENERIC_ERROR,
_("Cannot find thread-local variables on this target"));
addr = gdbarch_pointer_to_address (gdbarch, builtin->builtin_data_ptr, buf);
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;
}
/* 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_core_info_proc (gdbarch, fbsd_core_info_proc);
set_gdbarch_print_auxv_entry (gdbarch, fbsd_print_auxv_entry);
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_skip_solib_resolver (gdbarch, fbsd_skip_solib_resolver);
/* `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
_initialize_fbsd_tdep ()
{
fbsd_gdbarch_data_handle =
gdbarch_data_register_post_init (init_fbsd_gdbarch_data);
}
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