#include "defs.h"
#include "arch-utils.h"
#include "gdb_string.h"
#include <errno.h>
#include <signal.h>
#include <fcntl.h>
#ifdef HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#include "frame.h"
#include "inferior.h"
#include "symtab.h"
#include "command.h"
#include "bfd.h"
#include "target.h"
#include "gdbcore.h"
#include "gdbthread.h"
#include "regcache.h"
#include "regset.h"
#include "symfile.h"
#include "exec.h"
#include "readline/readline.h"
#include "observer.h"
#include "gdb_assert.h"
#include "exceptions.h"
#include "solib.h"
#include "inlining."
#ifndef O_BINARY
#define O_BINARY 0
#endif
#ifndef O_LARGEFILE
#define O_LARGEFILE 0
#endif
static struct core_fns *core_file_fns = NULL;
static struct core_fns *core_vec = NULL;
struct gdbarch *core_gdbarch = NULL;
static void core_files_info (struct target_ops *);
static struct core_fns *sniff_core_bfd (bfd *);
static int gdb_check_format (bfd *);
static void core_open (char *, int);
static void core_detach (char *, int);
static void core_close (int);
static void core_close_cleanup (void *ignore);
static void get_core_registers (int);
static void add_to_thread_list (bfd *, asection *, void *);
static int ignore (CORE_ADDR, bfd_byte *);
static int core_file_thread_alive (ptid_t tid);
static void init_core_ops (void);
void _initialize_corelow (void);
struct target_ops core_ops;
void
deprecated_add_core_fns (struct core_fns *cf)
{
cf->next = core_file_fns;
core_file_fns = cf;
}
int
default_core_sniffer (struct core_fns *our_fns, bfd *abfd)
{
int result;
result = (bfd_get_flavour (abfd) == our_fns -> core_flavour);
return (result);
}
static struct core_fns *
sniff_core_bfd (bfd *abfd)
{
struct core_fns *cf;
struct core_fns *yummy = NULL;
int matches = 0;;
if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch))
return NULL;
for (cf = core_file_fns; cf != NULL; cf = cf->next)
{
if (cf->core_sniffer (cf, abfd))
{
yummy = cf;
matches++;
}
}
if (matches > 1)
{
warning (_("\"%s\": ambiguous core format, %d handlers match"),
bfd_get_filename (abfd), matches);
}
else if (matches == 0)
{
warning (_("\"%s\": no core file handler recognizes format, using default"),
bfd_get_filename (abfd));
}
if (yummy == NULL)
{
yummy = core_file_fns;
}
return (yummy);
}
int
default_check_format (bfd *abfd)
{
return (0);
}
static int
gdb_check_format (bfd *abfd)
{
struct core_fns *cf;
for (cf = core_file_fns; cf != NULL; cf = cf->next)
{
if (cf->check_format (abfd))
{
return (1);
}
}
return (0);
}
static void
core_close (int quitting)
{
char *name;
if (core_bfd)
{
inferior_ptid = null_ptid;
#ifdef CLEAR_SOLIB
CLEAR_SOLIB ();
#else
clear_solib ();
#endif
name = bfd_get_filename (core_bfd);
if (!bfd_close (core_bfd))
warning (_("cannot close \"%s\": %s"),
name, bfd_errmsg (bfd_get_error ()));
xfree (name);
core_bfd = NULL;
if (core_ops.to_sections)
{
target_resize_to_sections
(&core_ops, core_ops.to_sections_end - core_ops.to_sections);
}
}
core_vec = NULL;
core_gdbarch = NULL;
}
static void
core_close_cleanup (void *ignore)
{
core_close (0);
}
static int
solib_add_stub (void *from_ttyp)
{
#ifdef SOLIB_ADD
SOLIB_ADD (NULL, *(int *) from_ttyp, ¤t_target, auto_solib_add);
#else
solib_add (NULL, *(int *)from_ttyp, ¤t_target, auto_solib_add);
#endif
re_enable_breakpoints_in_shlibs (0);
return 0;
}
static void
add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg)
{
int thread_id;
asection *reg_sect = (asection *) reg_sect_arg;
if (strncmp (bfd_section_name (abfd, asect), ".reg/", 5) != 0)
return;
thread_id = atoi (bfd_section_name (abfd, asect) + 5);
add_thread (pid_to_ptid (thread_id));
if (reg_sect != NULL
&& asect->filepos == reg_sect->filepos)
inferior_ptid = pid_to_ptid (thread_id);
}
static void
core_open (char *filename, int from_tty)
{
const char *p;
int siggy;
struct cleanup *old_chain;
char *temp;
bfd *temp_bfd;
int ontop;
int scratch_chan;
int flags;
target_preopen (from_tty);
if (!filename)
{
if (core_bfd)
error (_("No core file specified. (Use `detach' to stop debugging a core file.)"));
else
error (_("No core file specified."));
}
filename = tilde_expand (filename);
if (filename[0] != '/')
{
temp = concat (current_directory, "/", filename, (char *)NULL);
xfree (filename);
filename = temp;
}
old_chain = make_cleanup (xfree, filename);
flags = O_BINARY | O_LARGEFILE;
if (write_files)
flags |= O_RDWR;
else
flags |= O_RDONLY;
scratch_chan = open (filename, flags, 0);
if (scratch_chan < 0)
perror_with_name (filename);
temp_bfd = bfd_fopen (filename, gnutarget,
write_files ? FOPEN_RUB : FOPEN_RB,
scratch_chan);
if (temp_bfd == NULL)
perror_with_name (filename);
if (!bfd_check_format (temp_bfd, bfd_core) &&
!gdb_check_format (temp_bfd))
{
make_cleanup_bfd_close (temp_bfd);
error (_("\"%s\" is not a core dump: %s"),
filename, bfd_errmsg (bfd_get_error ()));
}
discard_cleanups (old_chain);
unpush_target (&core_ops);
core_bfd = temp_bfd;
old_chain = make_cleanup (core_close_cleanup, 0 );
core_gdbarch = gdbarch_from_bfd (core_bfd);
core_vec = sniff_core_bfd (core_bfd);
validate_files ();
if (build_section_table (core_bfd, &core_ops.to_sections,
&core_ops.to_sections_end))
error (_("\"%s\": Can't find sections: %s"),
bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ()));
if (!exec_bfd)
set_gdbarch_from_file (core_bfd);
ontop = !push_target (&core_ops);
discard_cleanups (old_chain);
observer_notify_inferior_created (&core_ops, from_tty);
p = bfd_core_file_failing_command (core_bfd);
if (p)
printf_filtered (_("Core was generated by `%s'.\n"), p);
siggy = bfd_core_file_failing_signal (core_bfd);
if (siggy > 0)
printf_filtered (_("Program terminated with signal %d, %s.\n"), siggy,
target_signal_to_string (target_signal_from_host (siggy)));
init_thread_list ();
bfd_map_over_sections (core_bfd, add_to_thread_list,
bfd_get_section_by_name (core_bfd, ".reg"));
if (ontop)
{
target_fetch_registers (-1);
catch_errors (solib_add_stub, &from_tty, (char *) 0, RETURN_MASK_ALL);
flush_cached_frames ();
select_frame (get_current_frame ());
print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
clear_inlined_subroutine_print_frames ();
}
else
{
warning (
"you won't be able to access this core file until you terminate\n\
your %s; do ``info files''", target_longname);
}
}
static void
core_detach (char *args, int from_tty)
{
if (args)
error (_("Too many arguments"));
unpush_target (&core_ops);
reinit_frame_cache ();
if (from_tty)
printf_filtered (_("No core file now.\n"));
}
static void
get_core_register_section (char *name,
int which,
char *human_name,
int required)
{
static char *section_name = NULL;
struct bfd_section *section;
bfd_size_type size;
char *contents;
xfree (section_name);
if (PIDGET (inferior_ptid))
section_name = xstrprintf ("%s/%d", name, PIDGET (inferior_ptid));
else
section_name = xstrdup (name);
section = bfd_get_section_by_name (core_bfd, section_name);
if (! section)
{
if (required)
warning (_("Couldn't find %s registers in core file."), human_name);
return;
}
size = bfd_section_size (core_bfd, section);
contents = alloca (size);
if (! bfd_get_section_contents (core_bfd, section, contents,
(file_ptr) 0, size))
{
warning (_("Couldn't read %s registers from `%s' section in core file."),
human_name, name);
return;
}
if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch))
{
const struct regset *regset;
regset = gdbarch_regset_from_core_section (core_gdbarch, name, size);
if (regset == NULL)
{
if (required)
warning (_("Couldn't recognize %s registers in core file."),
human_name);
return;
}
regset->supply_regset (regset, current_regcache, -1, contents, size);
return;
}
gdb_assert (core_vec);
core_vec->core_read_registers (contents, size, which,
((CORE_ADDR)
bfd_section_vma (core_bfd, section)));
}
static void
get_core_registers (int regno)
{
int status;
if (!(core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch))
&& (core_vec == NULL || core_vec->core_read_registers == NULL))
{
fprintf_filtered (gdb_stderr,
"Can't fetch registers from this type of core file\n");
return;
}
get_core_register_section (".reg", 0, "general-purpose", 1);
get_core_register_section (".reg2", 2, "floating-point", 0);
get_core_register_section (".reg-xfp", 3, "extended floating-point", 0);
deprecated_registers_fetched ();
}
static void
core_files_info (struct target_ops *t)
{
print_section_info (t, core_bfd);
}
static LONGEST
core_xfer_partial (struct target_ops *ops, enum target_object object,
const char *annex, gdb_byte *readbuf,
const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
{
switch (object)
{
case TARGET_OBJECT_MEMORY:
if (readbuf)
return (*ops->deprecated_xfer_memory) (offset, readbuf, len,
0, NULL, ops);
if (writebuf)
return (*ops->deprecated_xfer_memory) (offset, readbuf, len,
1, NULL, ops);
return -1;
case TARGET_OBJECT_AUXV:
if (readbuf)
{
struct bfd_section *section;
bfd_size_type size;
char *contents;
section = bfd_get_section_by_name (core_bfd, ".auxv");
if (section == NULL)
return -1;
size = bfd_section_size (core_bfd, section);
if (offset >= size)
return 0;
size -= offset;
if (size > len)
size = len;
if (size > 0
&& !bfd_get_section_contents (core_bfd, section, readbuf,
(file_ptr) offset, size))
{
warning (_("Couldn't read NT_AUXV note in core file."));
return -1;
}
return size;
}
return -1;
case TARGET_OBJECT_WCOOKIE:
if (readbuf)
{
struct bfd_section *section;
bfd_size_type size;
char *contents;
section = bfd_get_section_by_name (core_bfd, ".wcookie");
if (section == NULL)
return -1;
size = bfd_section_size (core_bfd, section);
if (offset >= size)
return 0;
size -= offset;
if (size > len)
size = len;
if (size > 0
&& !bfd_get_section_contents (core_bfd, section, readbuf,
(file_ptr) offset, size))
{
warning (_("Couldn't read StackGhost cookie in core file."));
return -1;
}
return size;
}
return -1;
default:
if (ops->beneath != NULL)
return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
readbuf, writebuf, offset, len);
return -1;
}
}
static int
ignore (CORE_ADDR addr, bfd_byte *contents)
{
return 0;
}
static int
core_file_thread_alive (ptid_t tid)
{
return 1;
}
static void
init_core_ops (void)
{
core_ops.to_shortname = "core";
core_ops.to_longname = "Local core dump file";
core_ops.to_doc =
"Use a core file as a target. Specify the filename of the core file.";
core_ops.to_open = core_open;
core_ops.to_close = core_close;
core_ops.to_attach = find_default_attach;
core_ops.to_detach = core_detach;
core_ops.to_fetch_registers = get_core_registers;
core_ops.to_xfer_partial = core_xfer_partial;
core_ops.deprecated_xfer_memory = xfer_memory;
core_ops.to_files_info = core_files_info;
core_ops.to_insert_breakpoint = ignore;
core_ops.to_remove_breakpoint = ignore;
core_ops.to_create_inferior = find_default_create_inferior;
core_ops.to_thread_alive = core_file_thread_alive;
core_ops.to_stratum = core_stratum;
core_ops.to_has_memory = 1;
core_ops.to_has_stack = 1;
core_ops.to_has_registers = 1;
core_ops.to_magic = OPS_MAGIC;
}
int coreops_suppress_target;
void
_initialize_corelow (void)
{
init_core_ops ();
if (!coreops_suppress_target)
add_target (&core_ops);
}