-/* Work with core dump and executable files, for GDB.
+/* Core dump and executable file functions above target vector, for GDB.
Copyright 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc.
This file is part of GDB.
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-#include <stdio.h>
+#include "defs.h"
#include <errno.h>
#include <signal.h>
#include <fcntl.h>
-#include "defs.h"
#include "frame.h" /* required by inferior.h */
#include "inferior.h"
#include "symtab.h"
#include "command.h"
+#include "gdbcmd.h"
#include "bfd.h"
#include "target.h"
#include "gdbcore.h"
-
-#ifdef SOLIB_ADD
-static int
-solib_add_stub PARAMS ((char *));
-#endif
-
-static void
-core_close PARAMS ((int));
-
-static void
-core_open PARAMS ((char *, int));
-
-static void
-core_detach PARAMS ((char *, int));
-
-static void
-get_core_registers PARAMS ((int));
-
-static void
-core_files_info PARAMS ((struct target_ops *));
-
-extern int sys_nerr;
-extern char *sys_errlist[];
-extern char *sys_siglist[];
+#include "dis-asm.h"
+#include "language.h"
extern char registers[];
bfd *core_bfd = NULL;
-/* Forward decl */
-extern struct target_ops core_ops;
-
\f
-/* Discard all vestiges of any previous core file
- and mark data and stack spaces as empty. */
-
-/* ARGSUSED */
-static void
-core_close (quitting)
- int quitting;
-{
- if (core_bfd) {
- free (bfd_get_filename (core_bfd));
- bfd_close (core_bfd);
- core_bfd = NULL;
-#ifdef CLEAR_SOLIB
- CLEAR_SOLIB ();
-#endif
- if (core_ops.to_sections) {
- free (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. */
-
-static int
-solib_add_stub (from_tty)
- char *from_tty;
-{
- SOLIB_ADD (NULL, (int)from_tty, &core_ops);
- return 0;
-}
-#endif /* SOLIB_ADD */
-
-/* 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, NULL, scratch_chan);
- if (temp_bfd == NULL)
- {
- perror_with_name (filename);
- }
-
- if (!bfd_check_format (temp_bfd, bfd_core))
- {
- /* Do it after the err msg */
- make_cleanup (bfd_close, temp_bfd);
- error ("\"%s\" is not a core dump: %s", filename, bfd_errmsg(bfd_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 ("Can't find sections in `%s': %s", bfd_get_filename(core_bfd),
- bfd_errmsg (bfd_error));
-
- ontop = !push_target (&core_ops);
- discard_cleanups (old_chain);
-
- p = bfd_core_file_failing_command (core_bfd);
- if (p)
- printf ("Core was generated by `%s'.\n", p);
-
- siggy = bfd_core_file_failing_signal (core_bfd);
- if (siggy > 0)
- printf ("Program terminated with signal %d, %s.\n", siggy,
- siggy < NSIG ? sys_siglist[siggy] : "(undocumented)");
-
- if (ontop) {
- /* Fetch all registers from core file */
- target_fetch_registers (-1);
-
- /* Add symbols and section mappings for any shared libraries */
-#ifdef SOLIB_ADD
- (void) catch_errors (solib_add_stub, (char *)from_tty, (char *)0);
-#endif
-
- /* Now, set up the frame cache, and print the top of stack */
- set_current_frame (create_new_frame (read_register (FP_REGNUM),
- read_pc ()));
- select_frame (get_current_frame (), 0);
- print_stack_frame (selected_frame, selected_frame_level, 1);
- } else {
- printf (
-"Warning: you won't be able to access this core file until you terminate\n\
-your %s; do ``info files''\n", current_target->to_longname);
- }
-}
-
-static void
-core_detach (args, from_tty)
- char *args;
- int from_tty;
-{
- if (args)
- error ("Too many arguments");
- unpush_target (&core_ops);
- if (from_tty)
- printf ("No core file now.\n");
-}
-
/* Backward compatability with old way of specifying core files. */
void
char *filename;
int from_tty;
{
+ struct target_ops *t;
+
dont_repeat (); /* Either way, seems bogus. */
- if (!filename)
- core_detach (filename, from_tty);
+
+ t = find_core_target ();
+ if (t != NULL)
+ if (!filename)
+ (t->to_detach) (filename, from_tty);
+ else
+ (t->to_open) (filename, from_tty);
else
- core_open (filename, from_tty);
+ error ("GDB can't read core files on this machine.");
}
\f
if (exec_bfd && core_bfd)
{
if (!core_file_matches_executable_p (core_bfd, exec_bfd))
- printf ("Warning: core file may not match specified executable file.\n");
+ warning ("core file may not match specified executable file.");
else if (bfd_get_mtime(exec_bfd) > bfd_get_mtime(core_bfd))
- printf ("Warning: exec file is newer than core file.\n");
+ warning ("exec file is newer than core file.");
}
}
return NULL;
}
-static void
-core_files_info (t)
- struct target_ops *t;
-{
- print_section_info (t, core_bfd);
-}
\f
/* Report a memory error with error(). */
int status;
CORE_ADDR memaddr;
{
-
+ /* FIXME-32x64--casting CORE_ADDR to unsigned long */
if (status == EIO)
{
/* Actually, address between memaddr and memaddr + len
was out of bounds. */
- error ("Cannot access memory at address %s.", local_hex_string(memaddr));
+ error ("Cannot access memory at address %s.",
+ local_hex_string((unsigned long) memaddr));
}
else
{
- if (status >= sys_nerr || status < 0)
- error ("Error accessing memory address %s: unknown error (%d).",
- local_hex_string(memaddr), status);
- else
- error ("Error accessing memory address %s: %s.",
- local_hex_string(memaddr), sys_errlist[status]);
+ error ("Error accessing memory address %s: %s.",
+ local_hex_string ((unsigned long) memaddr),
+ safe_strerror (status));
}
}
memory_error (status, memaddr);
}
+/* Like target_read_memory, but slightly different parameters. */
+
+int
+dis_asm_read_memory (memaddr, myaddr, len, info)
+ bfd_vma memaddr;
+ bfd_byte *myaddr;
+ int len;
+ disassemble_info *info;
+{
+ return target_read_memory (memaddr, (char *) myaddr, len);
+}
+
+/* Like memory_error with slightly different parameters. */
+void
+dis_asm_memory_error (status, memaddr, info)
+ int status;
+ bfd_vma memaddr;
+ disassemble_info *info;
+{
+ memory_error (status, memaddr);
+}
+
+/* Like print_address with slightly different parameters. */
+void
+dis_asm_print_address (addr, info)
+ bfd_vma addr;
+ struct disassemble_info *info;
+{
+ print_address (addr, info->stream);
+}
+
/* Same as target_write_memory, but report an error if can't write. */
void
write_memory (memaddr, myaddr, len)
/* Read an integer from debugged memory, given address and number of bytes. */
-long
+LONGEST
read_memory_integer (memaddr, len)
CORE_ADDR memaddr;
int len;
{
- char cbuf;
- short sbuf;
- int ibuf;
- long lbuf;
+ char buf[sizeof (LONGEST)];
- if (len == sizeof (char))
- {
- read_memory (memaddr, &cbuf, len);
- return cbuf;
- }
- if (len == sizeof (short))
- {
- read_memory (memaddr, (char *)&sbuf, len);
- SWAP_TARGET_AND_HOST (&sbuf, sizeof (short));
- return sbuf;
- }
- if (len == sizeof (int))
- {
- read_memory (memaddr, (char *)&ibuf, len);
- SWAP_TARGET_AND_HOST (&ibuf, sizeof (int));
- return ibuf;
- }
- if (len == sizeof (lbuf))
+ read_memory (memaddr, buf, len);
+ return extract_signed_integer (buf, len);
+}
+
+unsigned LONGEST
+read_memory_unsigned_integer (memaddr, len)
+ CORE_ADDR memaddr;
+ int len;
+{
+ char buf[sizeof (unsigned LONGEST)];
+
+ read_memory (memaddr, buf, len);
+ return extract_unsigned_integer (buf, len);
+}
+\f
+#if 0
+/* Enable after 4.12. It is not tested. */
+
+/* Search code. Targets can just make this their search function, or
+ if the protocol has a less general search function, they can call this
+ in the cases it can't handle. */
+void
+generic_search (len, data, mask, startaddr, increment, lorange, hirange
+ addr_found, data_found)
+ int len;
+ char *data;
+ char *mask;
+ CORE_ADDR startaddr;
+ int increment;
+ CORE_ADDR lorange;
+ CORE_ADDR hirange;
+ CORE_ADDR *addr_found;
+ char *data_found;
+{
+ int i;
+ CORE_ADDR curaddr = startaddr;
+
+ while (curaddr >= lorange && curaddr < hirange)
{
- read_memory (memaddr, (char *)&lbuf, len);
- SWAP_TARGET_AND_HOST (&lbuf, sizeof (lbuf));
- return lbuf;
+ read_memory (curaddr, data_found, len);
+ for (i = 0; i < len; ++i)
+ if ((data_found[i] & mask[i]) != data[i])
+ goto try_again;
+ /* It matches. */
+ *addr_found = curaddr;
+ return;
+
+ try_again:
+ curaddr += increment;
}
- error ("Cannot handle integers of %d bytes.", len);
- return -1; /* for lint */
+ *addr_found = (CORE_ADDR)0;
+ return;
}
+#endif /* 0 */
\f
-/* 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. */
+/* The current default bfd target. Points to storage allocated for
+ gnutarget_string. */
+char *gnutarget;
+
+/* Same thing, except it is "auto" not NULL for the default case. */
+static char *gnutarget_string;
+
+static void set_gnutarget_command
+ PARAMS ((char *, int, struct cmd_list_element *));
-/* We just get all the registers, so we don't use regno. */
-/* ARGSUSED */
static void
-get_core_registers (regno)
- int regno;
+set_gnutarget_command (ignore, from_tty, c)
+ char *ignore;
+ int from_tty;
+ struct cmd_list_element *c;
{
- sec_ptr reg_sec;
- unsigned size;
- char *the_regs;
-
- reg_sec = bfd_get_section_by_name (core_bfd, ".reg");
- 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));
- }
+ if (STREQ (gnutarget_string, "auto"))
+ gnutarget = NULL;
else
- {
-cant:
- fprintf (stderr, "Couldn't fetch registers from core file: %s\n",
- bfd_errmsg (bfd_error));
- }
+ gnutarget = gnutarget_string;
+}
- /* 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 (stderr, "Couldn't fetch register set 2 from core file: %s\n",
- bfd_errmsg (bfd_error));
- }
- }
- registers_fetched();
+/* Set the gnutarget. */
+void
+set_gnutarget (newtarget)
+ char *newtarget;
+{
+ if (gnutarget_string != NULL)
+ free (gnutarget_string);
+ gnutarget_string = savestring (newtarget, strlen (newtarget));
+ set_gnutarget_command (NULL, 0, NULL);
}
-\f
-struct target_ops core_ops = {
- "core", "Local core dump file",
- "Use a core file as a target. Specify the filename of the core file.",
- core_open, core_close,
- child_attach, core_detach, 0, 0, /* resume, wait */
- get_core_registers,
- 0, 0, 0, 0, /* store_regs, prepare_to_store, conv_to, conv_from */
- xfer_memory, core_files_info,
- 0, 0, /* core_insert_breakpoint, core_remove_breakpoint, */
- 0, 0, 0, 0, 0, /* terminal stuff */
- 0, 0, 0, /* kill, load, lookup sym */
- child_create_inferior, 0, /* mourn_inferior */
- core_stratum, 0, /* next */
- 0, 1, 1, 1, 0, /* all mem, mem, stack, regs, exec */
- 0, 0, /* section pointers */
- OPS_MAGIC, /* Always the last thing */
-};
void
_initialize_core()
{
-
- add_com ("core-file", class_files, core_file_command,
- "Use FILE as core dump for examining memory and registers.\n\
+ struct cmd_list_element *c;
+ c = add_cmd ("core-file", class_files, core_file_command,
+ "Use FILE as core dump for examining memory and registers.\n\
No arg means have no core file. This command has been superseded by the\n\
-`target core' and `detach' commands.");
- add_target (&core_ops);
+`target core' and `detach' commands.", &cmdlist);
+ c->completer = filename_completer;
+
+ c = add_set_cmd ("gnutarget", class_files, var_string_noescape,
+ (char *) &gnutarget_string,
+ "Set the current BFD target.\n\
+Use `set gnutarget auto' to specify automatic detection.",
+ &setlist);
+ c->function.sfunc = set_gnutarget_command;
+ add_show_from_set (c, &showlist);
+
+ if (getenv ("GNUTARGET"))
+ set_gnutarget (getenv ("GNUTARGET"));
+ else
+ set_gnutarget ("auto");
}