/* Low level interface to ptrace, for GDB when running under m68k SVR2 Unix on Altos 3068. Report bugs to Jyrki Kuoppala <jkp@cs.hut.fi> Copyright (C) 1989, 1991 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "defs.h" #include "frame.h" #include "inferior.h" #ifdef USG #include <sys/types.h> #endif #include <sys/param.h> #include <sys/dir.h> #include <signal.h> #include <sys/ioctl.h> #include <fcntl.h> #ifdef USG #include <sys/page.h> #ifdef ALTOS #include <sys/net.h> #include <errno.h> #endif #endif #include "gdbcore.h" #include <sys/user.h> /* After a.out.h */ #include <sys/file.h> #include "gdb_stat.h" /* Work with core dump and executable files, for GDB. This code would be in core.c if it weren't machine-dependent. */ void core_file_command (filename, from_tty) char *filename; int from_tty; { int val; extern char registers[]; /* Discard all vestiges of any previous core file and mark data and stack spaces as empty. */ if (corefile) free (corefile); corefile = 0; if (corechan >= 0) close (corechan); corechan = -1; data_start = 0; data_end = 0; stack_start = STACK_END_ADDR; stack_end = STACK_END_ADDR; /* Now, if a new core file was specified, open it and digest it. */ if (filename) { filename = tilde_expand (filename); make_cleanup (free, filename); if (have_inferior_p ()) error ("To look at a core file, you must kill the program with \"kill\"."); corechan = open (filename, O_RDONLY, 0); if (corechan < 0) perror_with_name (filename); /* 4.2-style (and perhaps also sysV-style) core dump file. */ { struct user u; unsigned int reg_offset; val = myread (corechan, &u, sizeof u); if (val < 0) perror_with_name ("Not a core file: reading upage"); if (val != sizeof u) error ("Not a core file: could only read %d bytes", val); data_start = exec_data_start; #if !defined (NBPG) #define NBPG NBPP #endif #if !defined (UPAGES) #define UPAGES USIZE #endif data_end = data_start + NBPG * u.u_dsize; stack_start = stack_end - NBPG * u.u_ssize; data_offset = NBPG * UPAGES + exec_data_start % NBPG /* Not sure about this //jkp */; stack_offset = NBPG * (UPAGES + u.u_dsize); /* Some machines put an absolute address in here and some put the offset in the upage of the regs. */ reg_offset = (int) u.u_state; if (reg_offset > NBPG * UPAGES) reg_offset -= KERNEL_U_ADDR; memcpy (&core_aouthdr, &u.u_exdata, sizeof (AOUTHDR)); printf_unfiltered ("Core file is from \"%s\".\n", u.u_comm); /* I don't know where to find this info. So, for now, mark it as not available. */ N_SET_MAGIC (core_aouthdr, 0); /* Read the register values out of the core file and store them where `read_register' will find them. */ { register int regno; for (regno = 0; regno < NUM_REGS; regno++) { char buf[MAX_REGISTER_RAW_SIZE]; val = lseek (corechan, register_addr (regno, reg_offset), 0); if (val < 0 || (val = myread (corechan, buf, sizeof buf)) < 0) { char * buffer = (char *) alloca (strlen (reg_names[regno]) + 30); strcpy (buffer, "Reading register "); strcat (buffer, reg_names[regno]); perror_with_name (buffer); } supply_register (regno, buf); } } } if (filename[0] == '/') corefile = savestring (filename, strlen (filename)); else { corefile = concat (current_directory, "/", filename, NULL); } flush_cached_frames (); select_frame (get_current_frame (), 0); validate_files (); } else if (from_tty) printf_unfiltered ("No core file now.\n"); }