-/* Work with core dump and executable files, for GDB.
- Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
-
-GDB is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY. No author or distributor accepts responsibility to anyone
-for the consequences of using it or for whether it serves any
-particular purpose or works at all, unless he says so in writing.
-Refer to the GDB General Public License for full details.
-
-Everyone is granted permission to copy, modify and redistribute GDB,
-but only under the conditions described in the GDB General Public
-License. A copy of this license is supposed to have been given to you
-along with GDB so you can know your rights and responsibilities. It
-should be in a file named COPYING. Among other things, the copyright
-notice and this notice must be preserved on all copies.
-
-In other words, go ahead and share GDB, but don't try to stop
-anyone else from sharing it farther. Help stamp out software hoarding!
-*/
+/* Core dump and executable file functions above target vector, for GDB.
+ Copyright 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc.
-#include "defs.h"
-#include "param.h"
-#include "gdbcore.h"
+This file is part of GDB.
-#ifdef USG
-#include <sys/types.h>
-#include <fcntl.h>
-#endif
+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.
-#ifdef COFF_ENCAPSULATE
-#include "a.out.encap.h"
-#else
-#include <a.out.h>
-#endif
+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.
-#ifndef N_MAGIC
-#ifdef COFF_FORMAT
-#define N_MAGIC(exec) ((exec).magic)
-#else
-#define N_MAGIC(exec) ((exec).a_magic)
-#endif
-#endif
+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 <stdio.h>
+#include "defs.h"
+#include <errno.h>
#include <signal.h>
-#include <sys/param.h>
-#include <sys/dir.h>
-#include <sys/file.h>
-#include <sys/stat.h>
-
-#ifdef UNISOFT_ASSHOLES
-#define PMMU
-#define NEW_PMMU
-#include <sys/seg.h> /* Required for user.ps */
-#include <sys/time.h> /* '' */
-#include <sys/mmu.h> /* '' */
-#include <sys/reg.h>
-#define mc68881 /* Required to get float in user.ps */
-#endif
-
-#ifdef UMAX_CORE
-#include <sys/ptrace.h>
-#else
-#include <sys/user.h>
-#endif
-
-#ifndef N_TXTADDR
-#define N_TXTADDR(hdr) 0
-#endif /* no N_TXTADDR */
-
-#ifndef N_DATADDR
-#define N_DATADDR(hdr) hdr.a_text
-#endif /* no N_DATADDR */
-
-#ifndef COFF_FORMAT
-#define AOUTHDR struct exec
-#endif
-
-extern char *sys_siglist[];
+#include <fcntl.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"
+#include "dis-asm.h"
+#include "language.h"
-extern core_file_command (), exec_file_command ();
+extern char registers[];
/* Hook for `exec_file_command' command to call. */
-void (*exec_file_display_hook) ();
-
-/* File names of core file and executable file. */
-
-char *corefile;
-char *execfile;
-
-/* Descriptors on which core file and executable file are open.
- Note that the execchan is closed when an inferior is created
- and reopened if the inferior dies or is killed. */
-
-int corechan;
-int execchan;
-
-/* Last modification time of executable file.
- Also used in source.c to compare against mtime of a source file. */
-
-int exec_mtime;
-
-/* Virtual addresses of bounds of the two areas of memory in the core file. */
-
-CORE_ADDR data_start;
-CORE_ADDR data_end;
-CORE_ADDR stack_start;
-CORE_ADDR stack_end;
-
-/* Virtual addresses of bounds of two areas of memory in the exec file.
- Note that the data area in the exec file is used only when there is no core file. */
+void (*exec_file_display_hook) PARAMS ((char *)) = NULL;
-CORE_ADDR text_start;
-CORE_ADDR text_end;
+/* Binary file diddling handle for the core file. */
-CORE_ADDR exec_data_start;
-CORE_ADDR exec_data_end;
+bfd *core_bfd = NULL;
-/* Address in executable file of start of text area data. */
-
-int text_offset;
-
-/* Address in executable file of start of data area data. */
-
-int exec_data_offset;
-
-/* Address in core file of start of data area data. */
-
-int data_offset;
-
-/* Address in core file of start of stack area data. */
-
-int stack_offset;
-
-#ifdef COFF_FORMAT
-/* various coff data structures */
-
-FILHDR file_hdr;
-SCNHDR text_hdr;
-SCNHDR data_hdr;
-
-#endif /* not COFF_FORMAT */
+\f
+/* Backward compatability with old way of specifying core files. */
-/* a.out header saved in core file. */
-
-AOUTHDR core_aouthdr;
+void
+core_file_command (filename, from_tty)
+ char *filename;
+ int from_tty;
+{
+ struct target_ops *t;
-/* a.out header of exec file. */
+ dont_repeat (); /* Either way, seems bogus. */
-AOUTHDR exec_aouthdr;
+ t = find_core_target ();
+ if (t != NULL)
+ if (!filename)
+ (t->to_detach) (filename, from_tty);
+ else
+ (t->to_open) (filename, from_tty);
+ else
+ error ("GDB can't read core files on this machine.");
+}
-void validate_files ();
-unsigned int register_addr ();
\f
/* Call this to specify the hook for exec_file_command to call back.
This is called from the x-window display code. */
void
specify_exec_file_hook (hook)
- void (*hook) ();
+ void (*hook) PARAMS ((char *));
{
exec_file_display_hook = hook;
}
void
close_exec_file ()
{
- if (execchan >= 0)
- close (execchan);
- execchan = -1;
+#ifdef FIXME
+ if (exec_bfd)
+ bfd_tempclose (exec_bfd);
+#endif
}
void
reopen_exec_file ()
{
- if (execchan < 0 && execfile != 0)
- {
- char *filename = concat (execfile, "", "");
- exec_file_command (filename, 0);
- free (filename);
- }
+#ifdef FIXME
+ if (exec_bfd)
+ bfd_reopen (exec_bfd);
+#endif
}
\f
/* If we have both a core file and an exec file,
- print a warning if they don't go together.
- This should really check that the core file came
- from that exec file, but I don't know how to do it. */
+ print a warning if they don't go together. */
void
validate_files ()
{
- if (execfile != 0 && corefile != 0)
+ if (exec_bfd && core_bfd)
{
- struct stat st_core;
-
- fstat (corechan, &st_core);
-
- if (N_MAGIC (core_aouthdr) != 0
- && bcmp (&core_aouthdr, &exec_aouthdr, sizeof core_aouthdr))
- printf ("Warning: core file does not match specified executable file.\n");
- else if (exec_mtime > st_core.st_mtime)
- printf ("Warning: exec file is newer than core file.\n");
+ if (!core_file_matches_executable_p (core_bfd, exec_bfd))
+ warning ("core file may not match specified executable file.");
+ else if (bfd_get_mtime(exec_bfd) > bfd_get_mtime(core_bfd))
+ warning ("exec file is newer than core file.");
}
}
get_exec_file (err)
int err;
{
- if (err && execfile == 0)
- error ("No executable file specified.\n\
-Use the \"exec-file\" and \"symbol-file\" commands.");
- return execfile;
-}
+ if (exec_bfd) return bfd_get_filename(exec_bfd);
+ if (!err) return NULL;
-int
-have_core_file_p ()
-{
- return corefile != 0;
+ error ("No executable file specified.\n\
+Use the \"file\" or \"exec-file\" command.");
+ return NULL;
}
-static void
-files_info ()
-{
- char *symfile;
- extern char *get_sym_file ();
-
- if (execfile)
- printf ("Executable file \"%s\".\n", execfile);
- else
- printf ("No executable file\n");
+\f
+/* Report a memory error with error(). */
- if (corefile)
- printf ("Core dump file \"%s\".\n", corefile);
+void
+memory_error (status, memaddr)
+ 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((unsigned long) memaddr));
+ }
else
- printf ("No core dump file\n");
-
- if (have_inferior_p ())
- printf ("Using the running image of the program, rather than these files.\n");
-
- symfile = get_sym_file ();
- if (symfile != 0)
- printf ("Symbols from \"%s\".\n", symfile);
-
- if (! have_inferior_p ())
{
- if (execfile)
- {
- printf ("Text segment in executable from 0x%x to 0x%x.\n",
- text_start, text_end);
- printf ("Data segment in executable from 0x%x to 0x%x.\n",
- exec_data_start, exec_data_end);
- if (corefile)
- printf("(But since we have a core file, we're using...)\n");
- }
- if (corefile)
- {
- printf ("Data segment in core file from 0x%x to 0x%x.\n",
- data_start, data_end);
- printf ("Stack segment in core file from 0x%x to 0x%x.\n",
- stack_start, stack_end);
- }
+ error ("Error accessing memory address %s: %s.",
+ local_hex_string ((unsigned long) memaddr),
+ safe_strerror (status));
}
}
-\f
-/* Read "memory data" from core file and/or executable file.
- Returns zero if successful, 1 if xfer_core_file failed, errno value if
- ptrace failed. */
-int
+/* Same as target_read_memory, but report an error if can't read. */
+void
read_memory (memaddr, myaddr, len)
CORE_ADDR memaddr;
char *myaddr;
int len;
{
- if (have_inferior_p ())
- return read_inferior_memory (memaddr, myaddr, len);
- else
- return xfer_core_file (memaddr, myaddr, len);
+ int status;
+ status = target_read_memory (memaddr, myaddr, len);
+ if (status != 0)
+ memory_error (status, memaddr);
}
-/* Write LEN bytes of data starting at address MYADDR
- into debugged program memory at address MEMADDR.
- Returns zero if successful, or an errno value if ptrace failed. */
+/* 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)
CORE_ADDR memaddr;
char *myaddr;
int len;
{
- if (have_inferior_p ())
- return write_inferior_memory (memaddr, myaddr, len);
- else
- error ("Can write memory only when program being debugged is running.");
+ int status;
+
+ status = target_write_memory (memaddr, myaddr, len);
+ if (status != 0)
+ memory_error (status, memaddr);
}
-/* Read from the program's memory (except for inferior processes).
- This function is misnamed, since it only reads, never writes; and
- since it will use the core file and/or executable file as necessary.
+/* Read an integer from debugged memory, given address and number of bytes. */
- It should be extended to write as well as read, FIXME, for patching files.
+LONGEST
+read_memory_integer (memaddr, len)
+ CORE_ADDR memaddr;
+ int len;
+{
+ char buf[sizeof (LONGEST)];
- Return 0 if address could be read, 1 if not. */
+ read_memory (memaddr, buf, len);
+ return extract_signed_integer (buf, len);
+}
-int
-xfer_core_file (memaddr, myaddr, len)
+unsigned LONGEST
+read_memory_unsigned_integer (memaddr, len)
CORE_ADDR memaddr;
- char *myaddr;
int len;
{
- register int i;
- register int val;
- int xferchan;
- char **xferfile;
- int fileptr;
- int returnval = 0;
-
- while (len > 0)
- {
- xferfile = 0;
- xferchan = 0;
-
- /* Determine which file the next bunch of addresses reside in,
- and where in the file. Set the file's read/write pointer
- to point at the proper place for the desired address
- and set xferfile and xferchan for the correct file.
-
- If desired address is nonexistent, leave them zero.
-
- i is set to the number of bytes that can be handled
- along with the next address.
-
- We put the most likely tests first for efficiency. */
-
- /* Note that if there is no core file
- data_start and data_end are equal. */
- if (memaddr >= data_start && memaddr < data_end)
- {
- i = min (len, data_end - memaddr);
- fileptr = memaddr - data_start + data_offset;
- xferfile = &corefile;
- xferchan = corechan;
- }
- /* Note that if there is no core file
- stack_start and stack_end are equal. */
- else if (memaddr >= stack_start && memaddr < stack_end)
- {
- i = min (len, stack_end - memaddr);
- fileptr = memaddr - stack_start + stack_offset;
- xferfile = &corefile;
- xferchan = corechan;
- }
- else if (corechan < 0
- && memaddr >= exec_data_start && memaddr < exec_data_end)
- {
- i = min (len, exec_data_end - memaddr);
- fileptr = memaddr - exec_data_start + exec_data_offset;
- xferfile = &execfile;
- xferchan = execchan;
- }
- else if (memaddr >= text_start && memaddr < text_end)
- {
- i = min (len, text_end - memaddr);
- fileptr = memaddr - text_start + text_offset;
- xferfile = &execfile;
- xferchan = execchan;
- }
- else if (memaddr < text_start)
- {
- i = min (len, text_start - memaddr);
- }
- else if (memaddr >= text_end
- && memaddr < (corechan >= 0? data_start : exec_data_start))
- {
- i = min (len, data_start - memaddr);
- }
- else if (memaddr >= (corechan >= 0 ? data_end : exec_data_end)
- && memaddr < stack_start)
- {
- i = min (len, stack_start - memaddr);
- }
- else if (memaddr >= stack_end && stack_end != 0)
- {
- i = min (len, - memaddr);
- }
- else
- {
- /* Address did not classify into one of the known ranges.
- This could be because data_start != exec_data_start
- or data_end similarly. */
- abort();
- }
-
- /* Now we know which file to use.
- Set up its pointer and transfer the data. */
- if (xferfile)
- {
- if (*xferfile == 0)
- if (xferfile == &execfile)
- error ("No program file to examine.");
- else
- error ("No core dump file or running program to examine.");
- val = lseek (xferchan, fileptr, 0);
- if (val < 0)
- perror_with_name (*xferfile);
- val = myread (xferchan, myaddr, i);
- if (val < 0)
- perror_with_name (*xferfile);
- }
- /* If this address is for nonexistent memory,
- read zeros if reading, or do nothing if writing.
- (FIXME we never write.) */
- else
- {
- bzero (myaddr, i);
- returnval = 1;
- }
-
- memaddr += i;
- myaddr += i;
- len -= i;
- }
- return returnval;
+ char buf[sizeof (unsigned LONGEST)];
+
+ read_memory (memaddr, buf, len);
+ return extract_unsigned_integer (buf, len);
}
\f
-/* My replacement for the read system call.
- Used like `read' but keeps going if `read' returns too soon. */
+#if 0
+/* Enable after 4.12. It is not tested. */
-int
-myread (desc, addr, len)
- int desc;
- char *addr;
+/* 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;
{
- register int val;
- int orglen = len;
+ int i;
+ CORE_ADDR curaddr = startaddr;
- while (len > 0)
+ while (curaddr >= lorange && curaddr < hirange)
{
- val = read (desc, addr, len);
- if (val < 0)
- return val;
- if (val == 0)
- return orglen - len;
- len -= val;
- addr += val;
+ 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;
}
- return orglen;
+ *addr_found = (CORE_ADDR)0;
+ return;
}
+#endif /* 0 */
\f
-#ifdef REGISTER_U_ADDR
-
-/* Return the address in the core dump or inferior of register REGNO.
- BLOCKEND is the address of the end of the user structure. */
+/* The current default bfd target. Points to storage allocated for
+ gnutarget_string. */
+char *gnutarget;
-unsigned int
-register_addr (regno, blockend)
- int regno;
- int blockend;
-{
- int addr;
+/* Same thing, except it is "auto" not NULL for the default case. */
+static char *gnutarget_string;
- if (regno < 0 || regno >= NUM_REGS)
- error ("Invalid register number %d.", regno);
+static void set_gnutarget_command
+ PARAMS ((char *, int, struct cmd_list_element *));
- REGISTER_U_ADDR (addr, blockend, regno);
+static void
+set_gnutarget_command (ignore, from_tty, c)
+ char *ignore;
+ int from_tty;
+ struct cmd_list_element *c;
+{
+ if (STREQ (gnutarget_string, "auto"))
+ gnutarget = NULL;
+ else
+ gnutarget = gnutarget_string;
+}
- return addr;
+/* 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);
}
-#endif /* REGISTER_U_ADDR */
-\f
void
_initialize_core()
{
- corechan = -1;
- execchan = -1;
- corefile = 0;
- execfile = 0;
- exec_file_display_hook = 0;
-
- text_start = 0;
- text_end = 0;
- data_start = 0;
- data_end = 0;
- exec_data_start = 0;
- exec_data_end = 0;
- stack_start = STACK_END_ADDR;
- stack_end = STACK_END_ADDR;
-
- add_com ("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.");
- add_com ("exec-file", class_files, exec_file_command,
- "Use FILE as program for getting contents of pure memory.\n\
-If FILE cannot be found as specified, your execution directory path\n\
-is searched for a command of that name.\n\
-No arg means have no executable file.");
- add_info ("files", files_info, "Names of files being debugged.");
+ 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.", &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");
}
-
projects / deliverable / binutils-gdb.git / blobdiff