/* Core dump and executable file functions below target vector, for GDB.
- Copyright 1986, 87, 89, 91, 92, 93, 94, 95, 96, 97, 1998
+ Copyright 1986, 87, 89, 91, 92, 93, 94, 95, 96, 97, 1998, 2000
Free Software Foundation, Inc.
This file is part of GDB.
#include <errno.h>
#include <signal.h>
#include <fcntl.h>
-#include <unistd.h>
#include "frame.h" /* required by inferior.h */
#include "inferior.h"
#include "symtab.h"
#include "gdbcore.h"
#include "gdbthread.h"
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
/* List of all available core_fns. On gdb startup, each core file register
reader calls add_core_fns() to register information on each core format it
is prepared to read. */
static struct core_fns *core_file_fns = NULL;
-static void core_files_info PARAMS ((struct target_ops *));
+/* 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;
+
+static void core_files_info (struct target_ops *);
#ifdef SOLIB_ADD
-static int solib_add_stub PARAMS ((PTR));
+static int solib_add_stub (PTR);
#endif
-static void core_open PARAMS ((char *, int));
+static struct core_fns *sniff_core_bfd (bfd *);
+
+static boolean gdb_check_format (bfd *);
+
+static void core_open (char *, int);
-static void core_detach PARAMS ((char *, int));
+static void core_detach (char *, int);
-static void core_close PARAMS ((int));
+static void core_close (int);
-static void get_core_registers PARAMS ((int));
+static void core_close_cleanup (void *ignore);
-static void add_to_thread_list PARAMS ((bfd *, asection *, PTR));
+static void get_core_registers (int);
-static int ignore PARAMS ((CORE_ADDR, char *));
+static void add_to_thread_list (bfd *, asection *, PTR);
-static char *core_file_to_sym_file PARAMS ((char *));
+static int ignore (CORE_ADDR, char *);
-static int core_file_thread_alive PARAMS ((int tid));
+static char *core_file_to_sym_file (char *);
-static void init_core_ops PARAMS ((void));
+static int core_file_thread_alive (int tid);
-void _initialize_corelow PARAMS ((void));
+static void init_core_ops (void);
+
+void _initialize_corelow (void);
struct target_ops core_ops;
handle. */
void
-add_core_fns (cf)
- struct core_fns *cf;
+add_core_fns (struct core_fns *cf)
{
cf->next = core_file_fns;
core_file_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. */
+
+int
+default_core_sniffer (struct core_fns *our_fns, bfd *abfd)
+{
+ int result;
+
+ result = (bfd_get_flavour (abfd) == our_fns -> core_flavour);
+ return (result);
+}
+
+/* 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. */
+
+static struct core_fns *
+sniff_core_bfd (bfd *abfd)
+{
+ struct core_fns *cf;
+ struct core_fns *yummy = NULL;
+ int matches = 0;;
+
+ 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);
+}
+
+/* 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. */
+
+int
+default_check_format (bfd *abfd)
+{
+ return (0);
+}
+
+/* Attempt to recognize core file formats that BFD rejects. */
+
+static boolean
+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 (true);
+ }
+ }
+ return (false);
+}
/* Discard all vestiges of any previous core file and mark data and stack
spaces as empty. */
/* ARGSUSED */
static void
-core_close (quitting)
- int quitting;
+core_close (int quitting)
{
char *name;
core_ops.to_sections_end = NULL;
}
}
+ core_vec = NULL;
+}
+
+static void
+core_close_cleanup (void *ignore)
+{
+ core_close (0/*ignored*/);
}
#ifdef SOLIB_ADD
is really an int * which points to from_tty. */
static int
-solib_add_stub (from_ttyp)
- PTR from_ttyp;
+solib_add_stub (PTR from_ttyp)
{
SOLIB_ADD (NULL, *(int *) from_ttyp, ¤t_target);
re_enable_breakpoints_in_shlibs ();
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;
+add_to_thread_list (bfd *abfd, asection *asect, PTR reg_sect_arg)
{
int thread_id;
asection *reg_sect = (asection *) reg_sect_arg;
/* This routine opens and sets up the core file bfd. */
static void
-core_open (filename, from_tty)
- char *filename;
- int from_tty;
+core_open (char *filename, int from_tty)
{
const char *p;
int siggy;
old_chain = make_cleanup (free, filename);
- scratch_chan = open (filename, write_files ? O_RDWR : O_RDONLY, 0);
+ scratch_chan = open (filename, O_BINARY | ( write_files ? O_RDWR : O_RDONLY ), 0);
if (scratch_chan < 0)
perror_with_name (filename);
if (temp_bfd == NULL)
perror_with_name (filename);
- if (!bfd_check_format (temp_bfd, bfd_core))
+ 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,
on error it does not free all the storage associated with the
bfd). */
- make_cleanup ((make_cleanup_func) bfd_close, 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); /* Don't free filename any more */
unpush_target (&core_ops);
core_bfd = temp_bfd;
- old_chain = make_cleanup ((make_cleanup_func) core_close, core_bfd);
+ old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/);
+
+ /* Find a suitable core file handler to munch on core_bfd */
+ core_vec = sniff_core_bfd (core_bfd);
validate_files ();
error ("\"%s\": Can't find sections: %s",
bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ()));
+ set_gdbarch_from_file (core_bfd);
+
ontop = !push_target (&core_ops);
discard_cleanups (old_chain);
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. Unfortunatly 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,
- safe_strsignal (siggy));
+ target_signal_to_string (target_signal_from_host (siggy)));
/* Build up thread list from BFD sections. */
}
static void
-core_detach (args, from_tty)
- char *args;
- int from_tty;
+core_detach (char *args, int from_tty)
{
if (args)
error ("Too many arguments");
printf_filtered ("No core file now.\n");
}
+
+/* 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_pid is zero, do the single-threaded thing: look for a
+ section named NAME. If inferior_pid 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_pid.
+
+ HUMAN_NAME is a human-readable name for the kind of registers the
+ 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. */
+
+static void
+get_core_register_section (char *name,
+ int which,
+ char *human_name,
+ int required)
+{
+ char section_name[100];
+ sec_ptr section;
+ bfd_size_type size;
+ char *contents;
+
+ if (inferior_pid)
+ sprintf (section_name, "%s/%d", name, inferior_pid);
+ else
+ strcpy (section_name, name);
+
+ section = bfd_get_section_by_name (core_bfd, section_name);
+ if (! section)
+ {
+ if (required)
+ warning ("Couldn't find %s registers in core file.\n", 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.\n",
+ human_name, name);
+ return;
+ }
+
+ core_vec->core_read_registers (contents, size, which,
+ ((CORE_ADDR)
+ bfd_section_vma (core_bfd, section)));
+}
+
+
/* 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. */
/* ARGSUSED */
static void
-get_core_registers (regno)
- int regno;
+get_core_registers (int regno)
{
- sec_ptr reg_sec;
- unsigned size;
- char *the_regs;
- char secname[30];
- enum bfd_flavour our_flavour = bfd_get_flavour (core_bfd);
- struct core_fns *cf = NULL;
-
- if (core_file_fns == NULL)
+ int status;
+
+ if (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;
}
- /* 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'. */
+ 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);
- /* 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);
- /* Look for the core functions that match this flavor. Default to the
- first one if nothing matches. */
- for (cf = core_file_fns; cf != NULL; cf = cf->next)
- {
- if (our_flavour == cf->core_flavour)
- {
- break;
- }
- }
- if (cf == NULL)
- {
- cf = core_file_fns;
- }
- if (cf != NULL &&
- bfd_get_section_contents (core_bfd, reg_sec, the_regs, (file_ptr) 0, size) &&
- cf->core_read_registers != NULL)
- {
- (cf->core_read_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 (cf != NULL &&
- bfd_get_section_contents (core_bfd, reg_sec, the_regs, (file_ptr) 0, size) &&
- cf->core_read_registers != NULL)
- {
- (cf->core_read_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 char *
-core_file_to_sym_file (core)
- char *core;
+core_file_to_sym_file (char *core)
{
CONST char *failing_command;
char *p;
/* 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 ((make_cleanup_func) bfd_close, temp_bfd);
+ make_cleanup_bfd_close (temp_bfd);
error ("\"%s\" is not a core dump: %s",
core, bfd_errmsg (bfd_get_error ()));
}
}
static void
-core_files_info (t)
- struct target_ops *t;
+core_files_info (struct target_ops *t)
{
print_section_info (t, core_bfd);
}
`gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */
static int
-ignore (addr, contents)
- CORE_ADDR addr;
- char *contents;
+ignore (CORE_ADDR addr, char *contents)
{
return 0;
}
behaviour.
*/
static int
-core_file_thread_alive (tid)
- int tid;
+core_file_thread_alive (int tid)
{
return 1;
}
/* Fill in core_ops with its defined operations and properties. */
static void
-init_core_ops ()
+init_core_ops (void)
{
core_ops.to_shortname = "core";
core_ops.to_longname = "Local core dump file";
int coreops_suppress_target;
void
-_initialize_corelow ()
+_initialize_corelow (void)
{
init_core_ops ();