/* 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
+ 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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 2 of the License, or
+ 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,
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, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "arch-utils.h"
#include "gdb_assert.h"
#include "exceptions.h"
#include "solib.h"
+#include "filenames.h"
+#include "progspace.h"
#ifndef O_LARGEFILE
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
+ of target sections --- those should come only from pure executable
+ or shared library bfds. The core bfd sections are an
+ implementation detail of the core target, just like ptrace is for
+ 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 (char *, int);
+static void core_detach (struct target_ops *ops, char *, int);
static void core_close (int);
static void core_close_cleanup (void *ignore);
-static void get_core_registers (struct regcache *, int);
-
static void add_to_thread_list (bfd *, asection *, void *);
-static int core_file_thread_alive (ptid_t tid);
-
static void init_core_ops (void);
void _initialize_corelow (void);
struct target_ops core_ops;
+/* 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
if (core_bfd)
{
+ int pid = ptid_get_pid (inferior_ptid);
inferior_ptid = null_ptid; /* Avoid confusion from thread stuff */
+ exit_inferior_silent (pid);
/* Clear out solib state while the bfd is still open. See
comments in clear_solib in solib.c. */
-#ifdef CLEAR_SOLIB
- CLEAR_SOLIB ();
-#else
clear_solib ();
-#endif
+
+ xfree (core_data->sections);
+ xfree (core_data);
+ core_data = NULL;
+ core_has_fake_pid = 0;
name = bfd_get_filename (core_bfd);
if (!bfd_close (core_bfd))
name, bfd_errmsg (bfd_get_error ()));
xfree (name);
core_bfd = NULL;
- if (core_ops.to_sections)
- {
- xfree (core_ops.to_sections);
- core_ops.to_sections = NULL;
- core_ops.to_sections_end = NULL;
- }
}
core_vec = NULL;
core_gdbarch = NULL;
static void
add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg)
{
- int thread_id;
+ ptid_t ptid;
+ int core_tid;
+ int pid, lwpid;
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);
+ core_tid = atoi (bfd_section_name (abfd, asect) + 5);
+
+ if (core_gdbarch
+ && gdbarch_core_reg_section_encodes_pid (core_gdbarch))
+ {
+ uint32_t merged_pid = core_tid;
+ pid = merged_pid & 0xffff;
+ lwpid = merged_pid >> 16;
+
+ /* This can happen on solaris core, for example, if we don't
+ find a NT_PSTATUS note in the core, but do find NT_LWPSTATUS
+ notes. */
+ if (pid == 0)
+ {
+ core_has_fake_pid = 1;
+ pid = CORELOW_PID;
+ }
+ }
+ else
+ {
+ core_has_fake_pid = 1;
+ pid = CORELOW_PID;
+ lwpid = core_tid;
+ }
+
+ if (current_inferior ()->pid == 0)
+ inferior_appeared (current_inferior (), pid);
+
+ ptid = ptid_build (pid, lwpid, 0);
- add_thread (pid_to_ptid (thread_id));
+ add_thread (ptid);
/* Warning, Will Robinson, looking at BFD private data! */
if (reg_sect != NULL
&& asect->filepos == reg_sect->filepos) /* Did we find .reg? */
- inferior_ptid = pid_to_ptid (thread_id); /* Yes, make it current */
+ inferior_ptid = ptid; /* Yes, make it current */
}
/* This routine opens and sets up the core file bfd. */
struct cleanup *old_chain;
char *temp;
bfd *temp_bfd;
- int ontop;
int scratch_chan;
int flags;
+ int corelow_pid = CORELOW_PID;
+ struct inferior *inf;
target_preopen (from_tty);
if (!filename)
}
filename = tilde_expand (filename);
- if (filename[0] != '/')
+ if (!IS_ABSOLUTE_PATH(filename))
{
temp = concat (current_directory, "/", filename, (char *)NULL);
xfree (filename);
if (temp_bfd == NULL)
perror_with_name (filename);
- if (!bfd_check_format (temp_bfd, bfd_core) &&
- !gdb_check_format (temp_bfd))
+ if (!bfd_check_format (temp_bfd, bfd_core)
+ && !gdb_check_format (temp_bfd))
{
/* Do it after the err msg */
/* FIXME: should be checking for errors from bfd_close (for one thing,
validate_files ();
+ core_data = XZALLOC (struct target_section_table);
+
/* Find the data section */
- if (build_section_table (core_bfd, &core_ops.to_sections,
- &core_ops.to_sections_end))
+ if (build_section_table (core_bfd,
+ &core_data->sections, &core_data->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);
+ push_target (&core_ops);
discard_cleanups (old_chain);
- /* This is done first, before anything has a chance to query the
- inferior for information such as symbols. */
+ /* Do this before acknowledging the inferior, so if
+ post_create_inferior throws (can happen easilly if you're loading
+ a core file with the wrong exec), we aren't left with threads
+ from the previous inferior. */
+ 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
+ last debug session --- e.g., b foo; run; gcore core1; step; gcore
+ core2; core core1; core core2 --- then there's potential for
+ get_current_regcache to return the cached regcache of the
+ previous session, and the frame cache being stale. */
+ registers_changed ();
+
+ /* Build up thread list from BFD sections, and possibly set the
+ current thread to the .reg/NN section matching the .reg
+ section. */
+ bfd_map_over_sections (core_bfd, add_to_thread_list,
+ bfd_get_section_by_name (core_bfd, ".reg"));
+
+ if (ptid_equal (inferior_ptid, null_ptid))
+ {
+ /* Either we found no .reg/NN section, and hence we have a
+ non-threaded core (single-threaded, from gdb's perspective),
+ or for some reason add_to_thread_list couldn't determine
+ which was the "main" thread. The latter case shouldn't
+ usually happen, but we're dealing with input here, which can
+ always be broken in different ways. */
+ struct thread_info *thread = first_thread_of_process (-1);
+ if (thread == NULL)
+ {
+ add_inferior_silent (CORELOW_PID);
+ inferior_ptid = pid_to_ptid (CORELOW_PID);
+ add_thread_silent (inferior_ptid);
+ }
+ else
+ switch_to_thread (thread->ptid);
+ }
+
post_create_inferior (&core_ops, from_tty);
+ /* Now go through the target stack looking for threads since there
+ 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 ();
+
p = bfd_core_file_failing_command (core_bfd);
if (p)
printf_filtered (_("Core was generated by `%s'.\n"), p);
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 (target_signal_from_host (siggy)));
+ target_signal_to_string (
+ (core_gdbarch != NULL) ?
+ gdbarch_target_signal_from_host (core_gdbarch, siggy)
+ : siggy));
- /* Build up thread list from BFD sections. */
+ /* Fetch all registers from core file. */
+ target_fetch_registers (get_current_regcache (), -1);
- init_thread_list ();
- bfd_map_over_sections (core_bfd, add_to_thread_list,
- bfd_get_section_by_name (core_bfd, ".reg"));
-
- if (ontop)
- {
- /* Fetch all registers from core file. */
- target_fetch_registers (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);
- }
- else
- {
- warning (
- "you won't be able to access this core file until you terminate\n\
-your %s; do ``info files''", target_longname);
- }
+ /* 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);
}
static void
-core_detach (char *args, int from_tty)
+core_detach (struct target_ops *ops, char *args, int from_tty)
{
if (args)
error (_("Too many arguments"));
- unpush_target (&core_ops);
+ unpush_target (ops);
reinit_frame_cache ();
if (from_tty)
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.
- If inferior_ptid is zero, do the single-threaded thing: look for a
- section named NAME. If inferior_ptid is non-zero, do the
- multi-threaded thing: look for a section named "NAME/PID", where
- PID is the shortest ASCII decimal representation of inferior_ptid.
+ If inferior_ptid's lwp member is zero, do the single-threaded
+ thing: look for a section named NAME. If inferior_ptid's lwp
+ member is non-zero, do the multi-threaded thing: look for a section
+ named "NAME/LWP", where LWP is the shortest ASCII decimal
+ representation of inferior_ptid's lwp member.
HUMAN_NAME is a human-readable name for the kind of registers the
NAME section contains, for use in error messages.
char *contents;
xfree (section_name);
- if (PIDGET (inferior_ptid))
- section_name = xstrprintf ("%s/%d", name, PIDGET (inferior_ptid));
+
+ if (core_gdbarch
+ && gdbarch_core_reg_section_encodes_pid (core_gdbarch))
+ {
+ uint32_t merged_pid;
+ int pid = ptid_get_pid (inferior_ptid);
+
+ if (core_has_fake_pid)
+ pid = 0;
+
+ merged_pid = ptid_get_lwp (inferior_ptid);
+ merged_pid = merged_pid << 16 | pid;
+
+ section_name = xstrprintf ("%s/%s", name, plongest (merged_pid));
+ }
+ else if (ptid_get_lwp (inferior_ptid))
+ section_name = xstrprintf ("%s/%ld", name, ptid_get_lwp (inferior_ptid));
else
section_name = xstrdup (name);
/* We just get all the registers, so we don't use regno. */
static void
-get_core_registers (struct regcache *regcache, int regno)
+get_core_registers (struct target_ops *ops,
+ struct regcache *regcache, int regno)
{
int i;
".reg2", 2, "floating-point", 0);
get_core_register_section (regcache,
".reg-xfp", 3, "extended floating-point", 0);
+ get_core_register_section (regcache,
+ ".reg-ppc-vmx", 3, "ppc Altivec", 0);
+ get_core_register_section (regcache,
+ ".reg-ppc-vsx", 4, "POWER7 VSX", 0);
/* Supply dummy value for all registers not found in the core. */
- for (i = 0; i < NUM_REGS; i++)
+ for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
if (!regcache_valid_p (regcache, i))
regcache_raw_supply (regcache, i, NULL);
}
static void
core_files_info (struct target_ops *t)
{
- print_section_info (t, core_bfd);
+ print_section_info (core_data, core_bfd);
}
\f
+struct spuid_list
+{
+ gdb_byte *buf;
+ ULONGEST offset;
+ LONGEST len;
+ ULONGEST pos;
+ ULONGEST written;
+};
+
+static void
+add_to_spuid_list (bfd *abfd, asection *asect, void *list_p)
+{
+ struct spuid_list *list = list_p;
+ enum bfd_endian byte_order
+ = 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);
+ if (pos == 0)
+ return;
+
+ if (list->pos >= list->offset && list->pos + 4 <= list->offset + list->len)
+ {
+ store_unsigned_integer (list->buf + list->pos - list->offset,
+ 4, byte_order, fd);
+ list->written += 4;
+ }
+ list->pos += 4;
+}
+
static LONGEST
core_xfer_partial (struct target_ops *ops, enum target_object object,
const char *annex, gdb_byte *readbuf,
switch (object)
{
case TARGET_OBJECT_MEMORY:
- if (readbuf)
- return (*ops->deprecated_xfer_memory) (offset, readbuf, len,
- 0/*write*/, NULL, ops);
- if (writebuf)
- return (*ops->deprecated_xfer_memory) (offset, readbuf, len,
- 1/*write*/, NULL, ops);
- return -1;
+ return section_table_xfer_memory_partial (readbuf, writebuf,
+ offset, len,
+ core_data->sections,
+ core_data->sections_end,
+ NULL);
case TARGET_OBJECT_AUXV:
if (readbuf)
}
return -1;
+ case TARGET_OBJECT_LIBRARIES:
+ if (core_gdbarch
+ && gdbarch_core_xfer_shared_libraries_p (core_gdbarch))
+ {
+ if (writebuf)
+ return -1;
+ return
+ gdbarch_core_xfer_shared_libraries (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>". */
+
+ struct bfd_section *section;
+ bfd_size_type size;
+ char *contents;
+
+ char sectionstr[100];
+ xsnprintf (sectionstr, sizeof sectionstr, "SPU/%s", annex);
+
+ section = bfd_get_section_by_name (core_bfd, sectionstr);
+ 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 SPU section in core file."));
+ return -1;
+ }
+
+ return size;
+ }
+ else if (readbuf)
+ {
+ /* NULL annex requests list of all present spuids. */
+ struct spuid_list list;
+ list.buf = readbuf;
+ list.offset = offset;
+ list.len = len;
+ list.pos = 0;
+ list.written = 0;
+ bfd_map_over_sections (core_bfd, add_to_spuid_list, &list);
+ return list.written;
+ }
+ return -1;
+
default:
if (ops->beneath != NULL)
return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
`gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */
static int
-ignore (struct bp_target_info *bp_tgt)
+ignore (struct gdbarch *gdbarch, struct bp_target_info *bp_tgt)
{
return 0;
}
behaviour.
*/
static int
-core_file_thread_alive (ptid_t tid)
+core_thread_alive (struct target_ops *ops, ptid_t ptid)
{
return 1;
}
+/* Ask the current architecture what it knows about this core file.
+ That will be used, in turn, to pick a better architecture. This
+ wrapper could be avoided if targets got a chance to specialize
+ core_ops. */
+
+static const struct target_desc *
+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 NULL;
+}
+
+static char *
+core_pid_to_str (struct target_ops *ops, ptid_t ptid)
+{
+ static char buf[64];
+
+ if (core_gdbarch
+ && gdbarch_core_pid_to_str_p (core_gdbarch))
+ {
+ char *ret = gdbarch_core_pid_to_str (core_gdbarch, ptid);
+ if (ret != NULL)
+ return ret;
+ }
+
+ if (ptid_get_lwp (ptid) == 0)
+ xsnprintf (buf, sizeof buf, "<main task>");
+ else
+ xsnprintf (buf, sizeof buf, "Thread %ld", ptid_get_lwp (ptid));
+
+ return buf;
+}
+
+static int
+core_has_memory (struct target_ops *ops)
+{
+ return (core_bfd != NULL);
+}
+
+static int
+core_has_stack (struct target_ops *ops)
+{
+ return (core_bfd != NULL);
+}
+
+static int
+core_has_registers (struct target_ops *ops)
+{
+ return (core_bfd != NULL);
+}
+
/* Fill in core_ops with its defined operations and properties. */
static void
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_thread_alive = core_thread_alive;
+ core_ops.to_read_description = core_read_description;
+ core_ops.to_pid_to_str = core_pid_to_str;
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_has_memory = core_has_memory;
+ core_ops.to_has_stack = core_has_stack;
+ core_ops.to_has_registers = core_has_registers;
core_ops.to_magic = OPS_MAGIC;
}
-/* non-zero if we should not do the add_target call in
- _initialize_corelow; not initialized (i.e., bss) so that
- the target can initialize it (i.e., data) if appropriate.
- This needs to be set at compile time because we don't know
- for sure whether the target's initialize routine is called
- before us or after us. */
-int coreops_suppress_target;
-
void
_initialize_corelow (void)
{
init_core_ops ();
- if (!coreops_suppress_target)
- add_target (&core_ops);
+ add_target (&core_ops);
}
projects / deliverable / binutils-gdb.git / blobdiff