| 1 | /* umax host stuff. |
| 2 | Copyright (C) 1986, 1987, 1989, 1991 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "frame.h" |
| 22 | #include "inferior.h" |
| 23 | |
| 24 | #include <sys/param.h> |
| 25 | #include <sys/dir.h> |
| 26 | #include <signal.h> |
| 27 | #include <sys/ioctl.h> |
| 28 | #include <fcntl.h> |
| 29 | |
| 30 | #include "gdbcore.h" |
| 31 | #include <sys/ptrace.h> |
| 32 | #define PTRACE_ATTACH PT_ATTACH |
| 33 | #define PTRACE_DETACH PT_FREEPROC |
| 34 | |
| 35 | #include <sys/file.h> |
| 36 | #include <sys/stat.h> |
| 37 | |
| 38 | /* Work with core dump and executable files, for GDB. |
| 39 | This code would be in core.c if it weren't machine-dependent. */ |
| 40 | |
| 41 | void |
| 42 | core_file_command (filename, from_tty) |
| 43 | char *filename; |
| 44 | int from_tty; |
| 45 | { |
| 46 | int val; |
| 47 | extern char registers[]; |
| 48 | |
| 49 | /* Discard all vestiges of any previous core file |
| 50 | and mark data and stack spaces as empty. */ |
| 51 | |
| 52 | if (corefile) |
| 53 | free (corefile); |
| 54 | corefile = 0; |
| 55 | |
| 56 | if (corechan >= 0) |
| 57 | close (corechan); |
| 58 | corechan = -1; |
| 59 | |
| 60 | data_start = 0; |
| 61 | data_end = 0; |
| 62 | stack_start = STACK_END_ADDR; |
| 63 | stack_end = STACK_END_ADDR; |
| 64 | |
| 65 | /* Now, if a new core file was specified, open it and digest it. */ |
| 66 | |
| 67 | if (filename) |
| 68 | { |
| 69 | filename = tilde_expand (filename); |
| 70 | make_cleanup (free, filename); |
| 71 | |
| 72 | if (have_inferior_p ()) |
| 73 | error ("To look at a core file, you must kill the program with \"kill\"."); |
| 74 | corechan = open (filename, O_RDONLY, 0); |
| 75 | if (corechan < 0) |
| 76 | perror_with_name (filename); |
| 77 | /* 4.2-style (and perhaps also sysV-style) core dump file. */ |
| 78 | { |
| 79 | struct ptrace_user u; |
| 80 | int reg_offset; |
| 81 | |
| 82 | val = myread (corechan, &u, sizeof u); |
| 83 | if (val < 0) |
| 84 | perror_with_name (filename); |
| 85 | data_start = exec_data_start; |
| 86 | |
| 87 | data_end = data_start + u.pt_dsize; |
| 88 | stack_start = stack_end - u.pt_ssize; |
| 89 | data_offset = sizeof u; |
| 90 | stack_offset = data_offset + u.pt_dsize; |
| 91 | reg_offset = 0; |
| 92 | |
| 93 | memcpy (&core_aouthdr, &u.pt_aouthdr, sizeof (AOUTHDR)); |
| 94 | printf_unfiltered ("Core file is from \"%s\".\n", u.pt_comm); |
| 95 | if (u.pt_signal > 0) |
| 96 | printf_unfiltered ("Program terminated with signal %d, %s.\n", |
| 97 | u.pt_signal, safe_strsignal (u.pt_signal)); |
| 98 | |
| 99 | /* Read the register values out of the core file and store |
| 100 | them where `read_register' will find them. */ |
| 101 | |
| 102 | { |
| 103 | register int regno; |
| 104 | |
| 105 | for (regno = 0; regno < NUM_REGS; regno++) |
| 106 | { |
| 107 | char buf[MAX_REGISTER_RAW_SIZE]; |
| 108 | |
| 109 | val = lseek (corechan, register_addr (regno, reg_offset), 0); |
| 110 | if (val < 0) |
| 111 | perror_with_name (filename); |
| 112 | |
| 113 | val = myread (corechan, buf, sizeof buf); |
| 114 | if (val < 0) |
| 115 | perror_with_name (filename); |
| 116 | supply_register (regno, buf); |
| 117 | } |
| 118 | } |
| 119 | } |
| 120 | if (filename[0] == '/') |
| 121 | corefile = savestring (filename, strlen (filename)); |
| 122 | else |
| 123 | { |
| 124 | corefile = concat (current_directory, "/", filename, NULL); |
| 125 | } |
| 126 | |
| 127 | set_current_frame ( create_new_frame (read_register (FP_REGNUM), |
| 128 | read_pc ())); |
| 129 | select_frame (get_current_frame (), 0); |
| 130 | validate_files (); |
| 131 | } |
| 132 | else if (from_tty) |
| 133 | printf_unfiltered ("No core file now.\n"); |
| 134 | } |