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dd3b648e RP |
1 | /* umax host stuff. |
2 | Copyright (C) 1986, 1987, 1989, 1991 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
99a7de40 | 6 | This program is free software; you can redistribute it and/or modify |
dd3b648e | 7 | it under the terms of the GNU General Public License as published by |
99a7de40 JG |
8 | the Free Software Foundation; either version 2 of the License, or |
9 | (at your option) any later version. | |
dd3b648e | 10 | |
99a7de40 | 11 | This program is distributed in the hope that it will be useful, |
dd3b648e RP |
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 | |
99a7de40 JG |
17 | along with this program; if not, write to the Free Software |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
dd3b648e RP |
19 | |
20 | #include <stdio.h> | |
21 | #include "defs.h" | |
22 | #include "param.h" | |
23 | #include "frame.h" | |
24 | #include "inferior.h" | |
25 | ||
26 | #include <sys/param.h> | |
27 | #include <sys/dir.h> | |
28 | #include <signal.h> | |
29 | #include <sys/ioctl.h> | |
30 | #include <fcntl.h> | |
31 | ||
32 | #include "gdbcore.h" | |
33 | #include <sys/ptrace.h> | |
34 | #define PTRACE_ATTACH PT_ATTACH | |
35 | #define PTRACE_DETACH PT_FREEPROC | |
36 | ||
37 | #include <sys/file.h> | |
38 | #include <sys/stat.h> | |
39 | ||
40 | /* Work with core dump and executable files, for GDB. | |
41 | This code would be in core.c if it weren't machine-dependent. */ | |
42 | ||
43 | void | |
44 | core_file_command (filename, from_tty) | |
45 | char *filename; | |
46 | int from_tty; | |
47 | { | |
48 | int val; | |
49 | extern char registers[]; | |
50 | ||
51 | /* Discard all vestiges of any previous core file | |
52 | and mark data and stack spaces as empty. */ | |
53 | ||
54 | if (corefile) | |
55 | free (corefile); | |
56 | corefile = 0; | |
57 | ||
58 | if (corechan >= 0) | |
59 | close (corechan); | |
60 | corechan = -1; | |
61 | ||
62 | data_start = 0; | |
63 | data_end = 0; | |
64 | stack_start = STACK_END_ADDR; | |
65 | stack_end = STACK_END_ADDR; | |
66 | ||
67 | /* Now, if a new core file was specified, open it and digest it. */ | |
68 | ||
69 | if (filename) | |
70 | { | |
71 | filename = tilde_expand (filename); | |
72 | make_cleanup (free, filename); | |
73 | ||
74 | if (have_inferior_p ()) | |
75 | error ("To look at a core file, you must kill the inferior with \"kill\"."); | |
76 | corechan = open (filename, O_RDONLY, 0); | |
77 | if (corechan < 0) | |
78 | perror_with_name (filename); | |
79 | /* 4.2-style (and perhaps also sysV-style) core dump file. */ | |
80 | { | |
81 | struct ptrace_user u; | |
82 | int reg_offset; | |
83 | ||
84 | val = myread (corechan, &u, sizeof u); | |
85 | if (val < 0) | |
86 | perror_with_name (filename); | |
87 | data_start = exec_data_start; | |
88 | ||
89 | data_end = data_start + u.pt_dsize; | |
90 | stack_start = stack_end - u.pt_ssize; | |
91 | data_offset = sizeof u; | |
92 | stack_offset = data_offset + u.pt_dsize; | |
93 | reg_offset = 0; | |
94 | ||
95 | bcopy (&u.pt_aouthdr, &core_aouthdr, sizeof (AOUTHDR)); | |
96 | printf ("Core file is from \"%s\".\n", u.pt_comm); | |
97 | if (u.pt_signal > 0) | |
98 | printf ("Program terminated with signal %d, %s.\n", | |
99 | u.pt_signal, | |
100 | u.pt_signal < NSIG | |
101 | ? sys_siglist[u.pt_signal] | |
102 | : "(undocumented)"); | |
103 | ||
104 | /* Read the register values out of the core file and store | |
105 | them where `read_register' will find them. */ | |
106 | ||
107 | { | |
108 | register int regno; | |
109 | ||
110 | for (regno = 0; regno < NUM_REGS; regno++) | |
111 | { | |
112 | char buf[MAX_REGISTER_RAW_SIZE]; | |
113 | ||
114 | val = lseek (corechan, register_addr (regno, reg_offset), 0); | |
115 | if (val < 0) | |
116 | perror_with_name (filename); | |
117 | ||
118 | val = myread (corechan, buf, sizeof buf); | |
119 | if (val < 0) | |
120 | perror_with_name (filename); | |
121 | supply_register (regno, buf); | |
122 | } | |
123 | } | |
124 | } | |
125 | if (filename[0] == '/') | |
126 | corefile = savestring (filename, strlen (filename)); | |
127 | else | |
128 | { | |
58ae87f6 | 129 | corefile = concat (current_directory, "/", filename, NULL); |
dd3b648e RP |
130 | } |
131 | ||
132 | set_current_frame ( create_new_frame (read_register (FP_REGNUM), | |
133 | read_pc ())); | |
134 | select_frame (get_current_frame (), 0); | |
135 | validate_files (); | |
136 | } | |
137 | else if (from_tty) | |
138 | printf ("No core file now.\n"); | |
139 | } |