/* Core dump and executable file functions below target vector, for GDB.
- Copyright (C) 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
- 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
- Free Software Foundation, Inc.
+ Copyright (C) 1986-2014 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "arch-utils.h"
-#include "gdb_string.h"
+#include <string.h>
#include <errno.h>
#include <signal.h>
#include <fcntl.h>
#include "filenames.h"
#include "progspace.h"
#include "objfiles.h"
-
+#include "gdb_bfd.h"
+#include "completer.h"
+#include "filestuff.h"
#ifndef O_LARGEFILE
#define O_LARGEFILE 0
static struct core_fns *core_file_fns = NULL;
-/* The core_fns for a core file handler that is prepared to read the core
- file currently open on core_bfd. */
+/* The core_fns for a core file handler that is prepared to read the
+ core file currently open on core_bfd. */
static struct core_fns *core_vec = NULL;
/* FIXME: kettenis/20031023: Eventually this variable should
disappear. */
-struct gdbarch *core_gdbarch = NULL;
+static struct gdbarch *core_gdbarch = NULL;
/* Per-core data. Currently, only the section table. Note that these
target sections are *not* mapped in the current address spaces' set
unix child targets. */
static struct target_section_table *core_data;
-/* True if we needed to fake the pid of the loaded core inferior. */
-static int core_has_fake_pid = 0;
-
static void core_files_info (struct target_ops *);
static struct core_fns *sniff_core_bfd (bfd *);
static void core_open (char *, int);
-static void core_detach (struct target_ops *ops, char *, int);
-
-static void core_close (int);
+static void core_close (void);
static void core_close_cleanup (void *ignore);
/* An arbitrary identifier for the core inferior. */
#define CORELOW_PID 1
-/* Link a new core_fns into the global core_file_fns list. Called on gdb
- startup by the _initialize routine in each core file register reader, to
- register information about each format the the reader is prepared to
- handle. */
+/* Link a new core_fns into the global core_file_fns list. Called on
+ gdb startup by the _initialize routine in each core file register
+ reader, to register information about each format the reader is
+ prepared to handle. */
void
deprecated_add_core_fns (struct core_fns *cf)
/* The default function that core file handlers can use to examine a
core file BFD and decide whether or not to accept the job of
- reading the core file. */
+ reading the core file. */
int
default_core_sniffer (struct core_fns *our_fns, bfd *abfd)
}
/* Walk through the list of core functions to find a set that can
- handle the core file open on ABFD. Default to the first one in the
- list if nothing matches. Returns pointer to set that is
- selected. */
+ handle the core file open on ABFD. Returns pointer to set that is
+ selected. */
static struct core_fns *
sniff_core_bfd (bfd *abfd)
struct core_fns *yummy = NULL;
int matches = 0;;
- /* Don't sniff if we have support for register sets in CORE_GDBARCH. */
+ /* Don't sniff if we have support for register sets in
+ CORE_GDBARCH. */
if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch))
return NULL;
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;
- }
+ error (_("\"%s\": no core file handler recognizes format"),
+ bfd_get_filename (abfd));
+
return (yummy);
}
/* The default is to reject every core file format we see. Either
BFD has to recognize it, or we have to provide a function in the
- core file handler that recognizes it. */
+ core file handler that recognizes it. */
int
default_check_format (bfd *abfd)
return (0);
}
-/* Attempt to recognize core file formats that BFD rejects. */
+/* Attempt to recognize core file formats that BFD rejects. */
static int
gdb_check_format (bfd *abfd)
return (0);
}
-/* Discard all vestiges of any previous core file and mark data and stack
- spaces as empty. */
+/* Discard all vestiges of any previous core file and mark data and
+ stack spaces as empty. */
static void
-core_close (int quitting)
+core_close (void)
{
- char *name;
-
if (core_bfd)
{
int pid = ptid_get_pid (inferior_ptid);
- inferior_ptid = null_ptid; /* Avoid confusion from thread stuff */
- exit_inferior_silent (pid);
+ inferior_ptid = null_ptid; /* Avoid confusion from thread
+ stuff. */
+ if (pid != 0)
+ exit_inferior_silent (pid);
- /* Clear out solib state while the bfd is still open. See
- comments in clear_solib in solib.c. */
+ /* Clear out solib state while the bfd is still open. See
+ comments in clear_solib in solib.c. */
clear_solib ();
- xfree (core_data->sections);
- xfree (core_data);
- core_data = NULL;
- core_has_fake_pid = 0;
+ if (core_data)
+ {
+ xfree (core_data->sections);
+ xfree (core_data);
+ core_data = NULL;
+ }
- name = bfd_get_filename (core_bfd);
- gdb_bfd_close_or_warn (core_bfd);
- xfree (name);
+ gdb_bfd_unref (core_bfd);
core_bfd = NULL;
}
core_vec = NULL;
static void
core_close_cleanup (void *ignore)
{
- core_close (0/*ignored*/);
+ core_close ();
}
-/* Look for sections whose names start with `.reg/' so that we can extract the
- list of threads in a core file. */
+/* Look for sections whose names start with `.reg/' so that we can
+ extract the list of threads in a core file. */
static void
add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg)
int core_tid;
int pid, lwpid;
asection *reg_sect = (asection *) reg_sect_arg;
+ int fake_pid_p = 0;
+ struct inferior *inf;
if (strncmp (bfd_section_name (abfd, asect), ".reg/", 5) != 0)
return;
pid = bfd_core_file_pid (core_bfd);
if (pid == 0)
{
- core_has_fake_pid = 1;
+ fake_pid_p = 1;
pid = CORELOW_PID;
}
lwpid = core_tid;
- if (current_inferior ()->pid == 0)
- inferior_appeared (current_inferior (), pid);
+ inf = current_inferior ();
+ if (inf->pid == 0)
+ {
+ inferior_appeared (inf, pid);
+ inf->fake_pid_p = fake_pid_p;
+ }
ptid = ptid_build (pid, lwpid, 0);
/* Warning, Will Robinson, looking at BFD private data! */
if (reg_sect != NULL
- && asect->filepos == reg_sect->filepos) /* Did we find .reg? */
- inferior_ptid = ptid; /* Yes, make it current */
+ && asect->filepos == reg_sect->filepos) /* Did we find .reg? */
+ inferior_ptid = ptid; /* Yes, make it current. */
}
/* This routine opens and sets up the core file bfd. */
bfd *temp_bfd;
int scratch_chan;
int flags;
+ volatile struct gdb_exception except;
target_preopen (from_tty);
if (!filename)
{
if (core_bfd)
- error (_("No core file specified. (Use `detach' to stop debugging a core file.)"));
+ error (_("No core file specified. (Use `detach' "
+ "to stop debugging a core file.)"));
else
error (_("No core file specified."));
}
filename = tilde_expand (filename);
- if (!IS_ABSOLUTE_PATH(filename))
+ if (!IS_ABSOLUTE_PATH (filename))
{
- temp = concat (current_directory, "/", filename, (char *)NULL);
+ temp = concat (current_directory, "/",
+ filename, (char *) NULL);
xfree (filename);
filename = temp;
}
flags |= O_RDWR;
else
flags |= O_RDONLY;
- scratch_chan = open (filename, flags, 0);
+ scratch_chan = gdb_open_cloexec (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);
+ temp_bfd = gdb_bfd_fopen (filename, gnutarget,
+ write_files ? FOPEN_RUB : FOPEN_RB,
+ scratch_chan);
if (temp_bfd == NULL)
perror_with_name (filename);
&& !gdb_check_format (temp_bfd))
{
/* Do it after the err msg */
- /* FIXME: should be checking for errors from bfd_close (for one thing,
- on error it does not free all the storage associated with the
- bfd). */
- make_cleanup_bfd_close (temp_bfd);
+ /* FIXME: should be checking for errors from bfd_close (for one
+ thing, on error it does not free all the storage associated
+ with the bfd). */
+ make_cleanup_bfd_unref (temp_bfd);
error (_("\"%s\" is not a core dump: %s"),
filename, bfd_errmsg (bfd_get_error ()));
}
- /* Looks semi-reasonable. Toss the old core file and work on the new. */
+ /* Looks semi-reasonable. Toss the old core file and work on the
+ new. */
- discard_cleanups (old_chain); /* Don't free filename any more */
+ do_cleanups (old_chain);
unpush_target (&core_ops);
core_bfd = temp_bfd;
old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/);
- /* FIXME: kettenis/20031023: This is very dangerous. The
- CORE_GDBARCH that results from this call may very well be
- different from CURRENT_GDBARCH. However, its methods may only
- work if it is selected as the current architecture, because they
- rely on swapped data (see gdbarch.c). We should get rid of that
- swapped data. */
core_gdbarch = gdbarch_from_bfd (core_bfd);
/* Find a suitable core file handler to munch on core_bfd */
/* Find the data section */
if (build_section_table (core_bfd,
- &core_data->sections, &core_data->sections_end))
+ &core_data->sections,
+ &core_data->sections_end))
error (_("\"%s\": Can't find sections: %s"),
bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ()));
init_thread_list ();
inferior_ptid = null_ptid;
- core_has_fake_pid = 0;
/* Need to flush the register cache (and the frame cache) from a
previous debug session. If inferior_ptid ends up the same as the
/* Build up thread list from BFD sections, and possibly set the
current thread to the .reg/NN section matching the .reg
- section. */
+ section. */
bfd_map_over_sections (core_bfd, add_to_thread_list,
bfd_get_section_by_name (core_bfd, ".reg"));
may be a thread_stratum target loaded on top of target core by
now. The layer above should claim threads found in the BFD
sections. */
- target_find_new_threads ();
+ TRY_CATCH (except, RETURN_MASK_ERROR)
+ {
+ target_find_new_threads ();
+ }
+
+ if (except.reason < 0)
+ exception_print (gdb_stderr, except);
p = bfd_core_file_failing_command (core_bfd);
if (p)
printf_filtered (_("Core was generated by `%s'.\n"), p);
+ /* Clearing any previous state of convenience variables. */
+ clear_exit_convenience_vars ();
+
siggy = bfd_core_file_failing_signal (core_bfd);
if (siggy > 0)
- /* NOTE: target_signal_from_host() converts a target signal value
- into gdb's internal signal value. Unfortunately gdb's internal
- value is called ``target_signal'' and this function got the
- name ..._from_host(). */
- printf_filtered (_("Program terminated with signal %d, %s.\n"), siggy,
- target_signal_to_string (
- (core_gdbarch != NULL) ?
- gdbarch_target_signal_from_host (core_gdbarch, siggy)
- : siggy));
+ {
+ /* If we don't have a CORE_GDBARCH to work with, assume a native
+ core (map gdb_signal from host signals). If we do have
+ CORE_GDBARCH to work with, but no gdb_signal_from_target
+ implementation for that gdbarch, as a fallback measure,
+ assume the host signal mapping. It'll be correct for native
+ cores, but most likely incorrect for cross-cores. */
+ enum gdb_signal sig = (core_gdbarch != NULL
+ && gdbarch_gdb_signal_from_target_p (core_gdbarch)
+ ? gdbarch_gdb_signal_from_target (core_gdbarch,
+ siggy)
+ : gdb_signal_from_host (siggy));
+
+ printf_filtered (_("Program terminated with signal %s, %s.\n"),
+ gdb_signal_to_name (sig), gdb_signal_to_string (sig));
+
+ /* Set the value of the internal variable $_exitsignal,
+ which holds the signal uncaught by the inferior. */
+ set_internalvar_integer (lookup_internalvar ("_exitsignal"),
+ siggy);
+ }
/* Fetch all registers from core file. */
target_fetch_registers (get_current_regcache (), -1);
/* Now, set up the frame cache, and print the top of stack. */
reinit_frame_cache ();
- print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
+ print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1);
}
static void
-core_detach (struct target_ops *ops, char *args, int from_tty)
+core_detach (struct target_ops *ops, const char *args, int from_tty)
{
if (args)
error (_("Too many arguments"));
printf_filtered (_("No core file now.\n"));
}
-#ifdef DEPRECATED_IBM6000_TARGET
-
-/* Resize the core memory's section table, by NUM_ADDED. Returns a
- pointer into the first new slot. This will not be necessary when
- the rs6000 target is converted to use the standard solib
- framework. */
-
-struct target_section *
-deprecated_core_resize_section_table (int num_added)
-{
- int old_count;
-
- old_count = resize_section_table (core_data, num_added);
- return core_data->sections + old_count;
-}
-
-#endif
-
/* Try to retrieve registers from a section in core_bfd, and supply
them to core_vec->core_read_registers, as the register set numbered
WHICH.
NAME section contains, for use in error messages.
If REQUIRED is non-zero, print an error if the core file doesn't
- have a section by the appropriate name. Otherwise, just do nothing. */
+ have a section by the appropriate name. Otherwise, just do
+ nothing. */
static void
get_core_register_section (struct regcache *regcache,
xfree (section_name);
if (ptid_get_lwp (inferior_ptid))
- section_name = xstrprintf ("%s/%ld", name, ptid_get_lwp (inferior_ptid));
+ section_name = xstrprintf ("%s/%ld", name,
+ ptid_get_lwp (inferior_ptid));
else
section_name = xstrdup (name);
if (! section)
{
if (required)
- warning (_("Couldn't find %s registers in core file."), human_name);
+ warning (_("Couldn't find %s registers in core file."),
+ human_name);
return;
}
{
const struct regset *regset;
- regset = gdbarch_regset_from_core_section (core_gdbarch, name, size);
+ regset = gdbarch_regset_from_core_section (core_gdbarch,
+ name, size);
if (regset == NULL)
{
if (required)
/* Get the registers out of a core file. This is the machine-
independent part. Fetch_core_registers is the machine-dependent
- part, typically implemented in the xm-file for each architecture. */
+ part, typically implemented in the xm-file for each
+ architecture. */
/* We just get all the registers, so we don't use regno. */
".reg2", 2, "floating-point", 0);
}
- /* Supply dummy value for all registers not found in the core. */
+ /* Mark all registers not found in the core as unavailable. */
for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
- if (!regcache_valid_p (regcache, i))
+ if (regcache_register_status (regcache, i) == REG_UNKNOWN)
regcache_raw_supply (regcache, i, NULL);
}
{
struct spuid_list *list = list_p;
enum bfd_endian byte_order
- = bfd_big_endian (abfd)? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
+ = bfd_big_endian (abfd) ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
int fd, pos = 0;
sscanf (bfd_section_name (abfd, asect), "SPU/%d/regs%n", &fd, &pos);
list->pos += 4;
}
+/* Read siginfo data from the core, if possible. Returns -1 on
+ failure. Otherwise, returns the number of bytes read. ABFD is the
+ core file's BFD; READBUF, OFFSET, and LEN are all as specified by
+ the to_xfer_partial interface. */
+
+static LONGEST
+get_core_siginfo (bfd *abfd, gdb_byte *readbuf, ULONGEST offset, LONGEST len)
+{
+ asection *section;
+ char *section_name;
+ const char *name = ".note.linuxcore.siginfo";
+
+ if (ptid_get_lwp (inferior_ptid))
+ section_name = xstrprintf ("%s/%ld", name,
+ ptid_get_lwp (inferior_ptid));
+ else
+ section_name = xstrdup (name);
+
+ section = bfd_get_section_by_name (abfd, section_name);
+ xfree (section_name);
+ if (section == NULL)
+ return -1;
+
+ if (!bfd_get_section_contents (abfd, section, readbuf, offset, len))
+ return -1;
+
+ return len;
+}
+
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)
+ const gdb_byte *writebuf, ULONGEST offset,
+ LONGEST len)
{
switch (object)
{
if (readbuf)
{
/* When the StackGhost cookie is stored in core file, BFD
- represents this with a fake section called ".wcookie". */
+ represents this with a fake section called
+ ".wcookie". */
struct bfd_section *section;
bfd_size_type size;
}
/* FALL THROUGH */
+ case TARGET_OBJECT_LIBRARIES_AIX:
+ if (core_gdbarch
+ && gdbarch_core_xfer_shared_libraries_aix_p (core_gdbarch))
+ {
+ if (writebuf)
+ return -1;
+ return
+ gdbarch_core_xfer_shared_libraries_aix (core_gdbarch,
+ readbuf, offset, len);
+ }
+ /* FALL THROUGH */
+
case TARGET_OBJECT_SPU:
if (readbuf && annex)
{
/* When the SPU contexts are stored in a core file, BFD
- represents this with a fake section called "SPU/<annex>". */
+ represents this with a fake section called
+ "SPU/<annex>". */
struct bfd_section *section;
bfd_size_type size;
}
return -1;
+ case TARGET_OBJECT_SIGNAL_INFO:
+ if (readbuf)
+ return get_core_siginfo (core_bfd, readbuf, offset, len);
+ return -1;
+
default:
if (ops->beneath != NULL)
- return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
- readbuf, writebuf, offset, len);
+ return ops->beneath->to_xfer_partial (ops->beneath, object,
+ annex, readbuf,
+ writebuf, offset, len);
return -1;
}
}
\f
/* If mourn is being called in all the right places, this could be say
- `gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */
+ `gdb internal error' (since generic_mourn calls
+ breakpoint_init_inferior). */
static int
ignore (struct gdbarch *gdbarch, struct bp_target_info *bp_tgt)
core_read_description (struct target_ops *target)
{
if (core_gdbarch && gdbarch_core_read_description_p (core_gdbarch))
- return gdbarch_core_read_description (core_gdbarch, target, core_bfd);
+ return gdbarch_core_read_description (core_gdbarch,
+ target, core_bfd);
return NULL;
}
core_pid_to_str (struct target_ops *ops, ptid_t ptid)
{
static char buf[64];
+ struct inferior *inf;
int pid;
/* The preferred way is to have a gdbarch/OS specific
/* Otherwise, this isn't a "threaded" core -- use the PID field, but
only if it isn't a fake PID. */
- if (!core_has_fake_pid)
+ inf = find_inferior_pid (ptid_get_pid (ptid));
+ if (inf != NULL && !inf->fake_pid_p)
return normal_pid_to_str (ptid);
/* No luck. We simply don't have a valid PID to print. */
return (core_bfd != NULL);
}
+/* Implement the to_info_proc method. */
+
+static void
+core_info_proc (struct target_ops *ops, char *args, enum info_proc_what request)
+{
+ struct gdbarch *gdbarch = get_current_arch ();
+
+ /* Since this is the core file target, call the 'core_info_proc'
+ method on gdbarch, not 'info_proc'. */
+ if (gdbarch_core_info_proc_p (gdbarch))
+ gdbarch_core_info_proc (gdbarch, args, request);
+}
+
/* Fill in core_ops with its defined operations and properties. */
static void
core_ops.to_has_memory = core_has_memory;
core_ops.to_has_stack = core_has_stack;
core_ops.to_has_registers = core_has_registers;
+ core_ops.to_info_proc = core_info_proc;
core_ops.to_magic = OPS_MAGIC;
if (core_target)
{
init_core_ops ();
- add_target (&core_ops);
+ add_target_with_completer (&core_ops, filename_completer);
}