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1 | /* Native-dependent code for FreeBSD. |
2 | ||
32d0add0 | 3 | Copyright (C) 2002-2015 Free Software Foundation, Inc. |
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4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
578c1c03 MK |
10 | (at your option) any later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
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19 | |
20 | #include "defs.h" | |
21 | #include "gdbcore.h" | |
22 | #include "inferior.h" | |
23 | #include "regcache.h" | |
24 | #include "regset.h" | |
2020b7ab | 25 | #include "gdbthread.h" |
578c1c03 | 26 | #include <sys/types.h> |
68b9939a MK |
27 | #include <sys/procfs.h> |
28 | #include <sys/sysctl.h> | |
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29 | |
30 | #include "elf-bfd.h" | |
31 | #include "fbsd-nat.h" | |
32 | ||
766062f6 | 33 | /* Return the name of a file that can be opened to get the symbols for |
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34 | the child process identified by PID. */ |
35 | ||
36 | char * | |
8dd27370 | 37 | fbsd_pid_to_exec_file (struct target_ops *self, int pid) |
578c1c03 | 38 | { |
b4ab256d HZ |
39 | ssize_t len = PATH_MAX; |
40 | static char buf[PATH_MAX]; | |
41 | char name[PATH_MAX]; | |
578c1c03 | 42 | |
68b9939a MK |
43 | #ifdef KERN_PROC_PATHNAME |
44 | int mib[4]; | |
578c1c03 | 45 | |
68b9939a MK |
46 | mib[0] = CTL_KERN; |
47 | mib[1] = KERN_PROC; | |
48 | mib[2] = KERN_PROC_PATHNAME; | |
49 | mib[3] = pid; | |
50 | if (sysctl (mib, 4, buf, &len, NULL, 0) == 0) | |
578c1c03 | 51 | return buf; |
68b9939a | 52 | #endif |
578c1c03 | 53 | |
b4ab256d HZ |
54 | xsnprintf (name, PATH_MAX, "/proc/%d/exe", pid); |
55 | len = readlink (name, buf, PATH_MAX - 1); | |
56 | if (len != -1) | |
68b9939a | 57 | { |
b4ab256d HZ |
58 | buf[len] = '\0'; |
59 | return buf; | |
68b9939a MK |
60 | } |
61 | ||
b4ab256d | 62 | return NULL; |
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63 | } |
64 | ||
65 | static int | |
66 | fbsd_read_mapping (FILE *mapfile, unsigned long *start, unsigned long *end, | |
67 | char *protection) | |
68 | { | |
69 | /* FreeBSD 5.1-RELEASE uses a 256-byte buffer. */ | |
70 | char buf[256]; | |
71 | int resident, privateresident; | |
72 | unsigned long obj; | |
73 | int ret = EOF; | |
74 | ||
75 | /* As of FreeBSD 5.0-RELEASE, the layout is described in | |
76 | /usr/src/sys/fs/procfs/procfs_map.c. Somewhere in 5.1-CURRENT a | |
77 | new column was added to the procfs map. Therefore we can't use | |
78 | fscanf since we need to support older releases too. */ | |
79 | if (fgets (buf, sizeof buf, mapfile) != NULL) | |
80 | ret = sscanf (buf, "%lx %lx %d %d %lx %s", start, end, | |
81 | &resident, &privateresident, &obj, protection); | |
82 | ||
83 | return (ret != 0 && ret != EOF); | |
84 | } | |
85 | ||
86 | /* Iterate over all the memory regions in the current inferior, | |
87 | calling FUNC for each memory region. OBFD is passed as the last | |
88 | argument to FUNC. */ | |
89 | ||
90 | int | |
2e73927c TT |
91 | fbsd_find_memory_regions (struct target_ops *self, |
92 | find_memory_region_ftype func, void *obfd) | |
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93 | { |
94 | pid_t pid = ptid_get_pid (inferior_ptid); | |
95 | char *mapfilename; | |
96 | FILE *mapfile; | |
97 | unsigned long start, end, size; | |
98 | char protection[4]; | |
99 | int read, write, exec; | |
7c8a8b04 | 100 | struct cleanup *cleanup; |
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101 | |
102 | mapfilename = xstrprintf ("/proc/%ld/map", (long) pid); | |
7c8a8b04 | 103 | cleanup = make_cleanup (xfree, mapfilename); |
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104 | mapfile = fopen (mapfilename, "r"); |
105 | if (mapfile == NULL) | |
8a3fe4f8 | 106 | error (_("Couldn't open %s."), mapfilename); |
7c8a8b04 | 107 | make_cleanup_fclose (mapfile); |
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108 | |
109 | if (info_verbose) | |
110 | fprintf_filtered (gdb_stdout, | |
111 | "Reading memory regions from %s\n", mapfilename); | |
112 | ||
113 | /* Now iterate until end-of-file. */ | |
114 | while (fbsd_read_mapping (mapfile, &start, &end, &protection[0])) | |
115 | { | |
116 | size = end - start; | |
117 | ||
118 | read = (strchr (protection, 'r') != 0); | |
119 | write = (strchr (protection, 'w') != 0); | |
120 | exec = (strchr (protection, 'x') != 0); | |
121 | ||
122 | if (info_verbose) | |
123 | { | |
124 | fprintf_filtered (gdb_stdout, | |
5af949e3 | 125 | "Save segment, %ld bytes at %s (%c%c%c)\n", |
f5656ead | 126 | size, paddress (target_gdbarch (), start), |
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127 | read ? 'r' : '-', |
128 | write ? 'w' : '-', | |
129 | exec ? 'x' : '-'); | |
130 | } | |
131 | ||
4f69f4c2 JK |
132 | /* Invoke the callback function to create the corefile segment. |
133 | Pass MODIFIED as true, we do not know the real modification state. */ | |
134 | func (start, size, read, write, exec, 1, obfd); | |
578c1c03 MK |
135 | } |
136 | ||
7c8a8b04 | 137 | do_cleanups (cleanup); |
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138 | return 0; |
139 | } |