old-cross-binutils/gdb/corelow.c
Jeff Law 43fc25c87e * inftarg.c (child_thread_alive): New function to see if a
particular thread is still running.
        (child_ops): Add child_thread_alive entry.
        * remote.c (remote_thread_alive): New function to see if a
        particular thread is still alive.
        (remote_ops): Add remote_thread_alive.
        * target.c (dummy_target): Add dummy entry for thread_alive.
        (cleanup_target): de_fault thread_alive too.
        (update_current_target): INHERIT thread_alive too.
        (debug_to_thread_alive): New function.
        (setup_target_debug): Add debug_to_thread_alive.
        * target.h (struct target_ops): Add to_thread_alive.
        (target_thread_alive): Define.
        * thread.c (info_threads_command): Don't call kill; use
        target_thread_alive instead.
        * config/nm-lynx.h (CHILD_THREAD_ALIVE): Define.
        * gdbserver/low-lynx.c (mythread_alive): New function.
        (mywait): Don't restart any threads after a new thread notification,
        let the generic code handle it.
        * gdbserver/low-sparc.c (mythread_alive): Dummy version.
        * gdbserver/low-sun3.c (mythread_alive): Likewise.
        * gdbserver/server.c (main): Handle thread_alive requests.
        * gdbserver/server.h (mythread_alive): Declare.
        * corelow.c (core_ops): Add dummy entry for thread_alive.
        * exec.c (exec_ops): Likewise.
        * m3-nat.c (m3_ops): Likewise.
        * monitor.c (monitor_ops): Likewise.
        * procfs.c (procfs_ops): Likewise.
        * remote-arc.c (arc_ops): Likewise.
        * remote-array.c (array_ops): Likewise.
        * remote-e7000.c (e7000_ops): Likewise.
        * remote-es.c (es1800_ops, es1800_child_ops): Likewise.
        * remote-mips.c (mips_ops): Likewise.
        * remote-pa.c (remote_hppro_ops): Likewise.
        * remote-sim.c (gdbsim_ops): Likewise.
        * sparcl-tdep.c (sparclite_ops): Likewise.

More lynx-6100 work
1995-07-13 21:40:22 +00:00

380 lines
10 KiB
C
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/* Core dump and executable file functions below target vector, for GDB.
Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995
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
(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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "defs.h"
#include <string.h>
#include <errno.h>
#include <signal.h>
#include <fcntl.h>
#include "frame.h" /* required by inferior.h */
#include "inferior.h"
#include "symtab.h"
#include "command.h"
#include "bfd.h"
#include "target.h"
#include "gdbcore.h"
#include "thread.h"
static void core_files_info PARAMS ((struct target_ops *));
#ifdef SOLIB_ADD
static int solib_add_stub PARAMS ((char *));
#endif
static void core_open PARAMS ((char *, int));
static void core_detach PARAMS ((char *, int));
static void core_close PARAMS ((int));
static void get_core_registers PARAMS ((int));
/* Discard all vestiges of any previous core file and mark data and stack
spaces as empty. */
/* ARGSUSED */
static void
core_close (quitting)
int quitting;
{
char *name;
inferior_pid = 0; /* Avoid confusion from thread stuff */
if (core_bfd)
{
name = bfd_get_filename (core_bfd);
if (!bfd_close (core_bfd))
warning ("cannot close \"%s\": %s",
name, bfd_errmsg (bfd_get_error ()));
free (name);
core_bfd = NULL;
#ifdef CLEAR_SOLIB
CLEAR_SOLIB ();
#endif
if (core_ops.to_sections)
{
free ((PTR)core_ops.to_sections);
core_ops.to_sections = NULL;
core_ops.to_sections_end = NULL;
}
}
}
#ifdef SOLIB_ADD
/* Stub function for catch_errors around shared library hacking. FROM_TTYP
is really an int * which points to from_tty. */
static int
solib_add_stub (from_ttyp)
char *from_ttyp;
{
SOLIB_ADD (NULL, *(int *)from_ttyp, &current_target);
return 0;
}
#endif /* SOLIB_ADD */
/* 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 (abfd, asect, reg_sect_arg)
bfd *abfd;
asection *asect;
PTR 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 (thread_id);
/* Warning, Will Robinson, looking at BFD private data! */
if (asect->filepos == reg_sect->filepos) /* Did we find .reg? */
inferior_pid = thread_id; /* Yes, make it current */
}
/* This routine opens and sets up the core file bfd. */
static void
core_open (filename, from_tty)
char *filename;
int from_tty;
{
const char *p;
int siggy;
struct cleanup *old_chain;
char *temp;
bfd *temp_bfd;
int ontop;
int scratch_chan;
target_preopen (from_tty);
if (!filename)
{
error (core_bfd ?
"No core file specified. (Use `detach' to stop debugging a core file.)"
: "No core file specified.");
}
filename = tilde_expand (filename);
if (filename[0] != '/')
{
temp = concat (current_directory, "/", filename, NULL);
free (filename);
filename = temp;
}
old_chain = make_cleanup (free, filename);
scratch_chan = open (filename, write_files ? O_RDWR : O_RDONLY, 0);
if (scratch_chan < 0)
perror_with_name (filename);
temp_bfd = bfd_fdopenr (filename, gnutarget, scratch_chan);
if (temp_bfd == NULL)
perror_with_name (filename);
if (!bfd_check_format (temp_bfd, bfd_core))
{
/* 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);
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. */
discard_cleanups (old_chain); /* Don't free filename any more */
unpush_target (&core_ops);
core_bfd = temp_bfd;
old_chain = make_cleanup (core_close, core_bfd);
validate_files ();
/* Find the data section */
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 ()));
ontop = !push_target (&core_ops);
discard_cleanups (old_chain);
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,
safe_strsignal (siggy));
/* Build up thread list from BFD sections. */
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 (-1);
/* Add symbols and section mappings for any shared libraries. */
#ifdef SOLIB_ADD
catch_errors (solib_add_stub, &from_tty, (char *)0,
RETURN_MASK_ALL);
/* solib_add_stub usually modifies current_target.to_sections, which
has to be reflected in core_ops to enable proper freeing of
the to_sections vector in core_close and correct section
mapping in xfer_memory and core_files_info. */
core_ops.to_sections = current_target.to_sections;
core_ops.to_sections_end = current_target.to_sections_end;
#endif
/* Now, set up the frame cache, and print the top of stack. */
flush_cached_frames ();
select_frame (get_current_frame (), 0);
print_stack_frame (selected_frame, selected_frame_level, 1);
}
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 (args, from_tty)
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");
}
/* 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. */
/* We just get all the registers, so we don't use regno. */
/* ARGSUSED */
static void
get_core_registers (regno)
int regno;
{
sec_ptr reg_sec;
unsigned size;
char *the_regs;
char secname[10];
/* Thread support. If inferior_pid is non-zero, then we have found a core
file with threads (or multiple processes). In that case, we need to
use the appropriate register section, else we just use `.reg'. */
/* XXX - same thing needs to be done for floating-point (.reg2) sections. */
if (inferior_pid)
sprintf (secname, ".reg/%d", inferior_pid);
else
strcpy (secname, ".reg");
reg_sec = bfd_get_section_by_name (core_bfd, secname);
if (!reg_sec)
goto cant;
size = bfd_section_size (core_bfd, reg_sec);
the_regs = alloca (size);
if (bfd_get_section_contents (core_bfd, reg_sec, the_regs, (file_ptr)0, size))
{
fetch_core_registers (the_regs, size, 0,
(unsigned) bfd_section_vma (abfd,reg_sec));
}
else
{
cant:
fprintf_filtered (gdb_stderr,
"Couldn't fetch registers from core file: %s\n",
bfd_errmsg (bfd_get_error ()));
}
/* Now do it again for the float registers, if they exist. */
reg_sec = bfd_get_section_by_name (core_bfd, ".reg2");
if (reg_sec)
{
size = bfd_section_size (core_bfd, reg_sec);
the_regs = alloca (size);
if (bfd_get_section_contents (core_bfd, reg_sec, the_regs, (file_ptr)0,
size))
{
fetch_core_registers (the_regs, size, 2,
(unsigned) bfd_section_vma (abfd,reg_sec));
}
else
{
fprintf_filtered (gdb_stderr,
"Couldn't fetch register set 2 from core file: %s\n",
bfd_errmsg (bfd_get_error ()));
}
}
registers_fetched ();
}
static void
core_files_info (t)
struct target_ops *t;
{
print_section_info (t, core_bfd);
}
/* If mourn is being called in all the right places, this could be say
`gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */
static int
ignore (addr, contents)
CORE_ADDR addr;
char *contents;
{
return 0;
}
struct target_ops core_ops = {
"core", /* to_shortname */
"Local core dump file", /* to_longname */
"Use a core file as a target. Specify the filename of the core file.", /* to_doc */
core_open, /* to_open */
core_close, /* to_close */
find_default_attach, /* to_attach */
core_detach, /* to_detach */
0, /* to_resume */
0, /* to_wait */
get_core_registers, /* to_fetch_registers */
0, /* to_store_registers */
0, /* to_prepare_to_store */
xfer_memory, /* to_xfer_memory */
core_files_info, /* to_files_info */
ignore, /* to_insert_breakpoint */
ignore, /* to_remove_breakpoint */
0, /* to_terminal_init */
0, /* to_terminal_inferior */
0, /* to_terminal_ours_for_output */
0, /* to_terminal_ours */
0, /* to_terminal_info */
0, /* to_kill */
0, /* to_load */
0, /* to_lookup_symbol */
find_default_create_inferior, /* to_create_inferior */
0, /* to_mourn_inferior */
0, /* to_can_run */
0, /* to_notice_signals */
0, /* to_thread_alive */
0, /* to_stop */
core_stratum, /* to_stratum */
0, /* to_next */
0, /* to_has_all_memory */
1, /* to_has_memory */
1, /* to_has_stack */
1, /* to_has_registers */
0, /* to_has_execution */
0, /* to_sections */
0, /* to_sections_end */
OPS_MAGIC, /* to_magic */
};
void
_initialize_corelow()
{
add_target (&core_ops);
}