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0501d603 | 1 | /* Miscellaneous support functions for dynamic linker |
fc7f617d | 2 | Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc. |
9498096c UD |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Library General Public License as | |
7 | published by the Free Software Foundation; either version 2 of the | |
8 | License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Library General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Library General Public | |
16 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
18 | Boston, MA 02111-1307, USA. */ | |
19 | ||
0501d603 UD |
20 | #include <assert.h> |
21 | #include <fcntl.h> | |
48896b9d | 22 | #include <ldsodefs.h> |
fc7f617d | 23 | #include <link.h> |
9498096c UD |
24 | #include <stdarg.h> |
25 | #include <string.h> | |
8193034b | 26 | #include <unistd.h> |
0501d603 UD |
27 | #include <sys/mman.h> |
28 | #include <sys/stat.h> | |
8193034b | 29 | #include <stdio-common/_itoa.h> |
0501d603 UD |
30 | |
31 | #ifndef MAP_ANON | |
32 | /* This is the only dl-sysdep.c function that is actually needed at run-time | |
33 | by _dl_map_object. */ | |
34 | ||
35 | int | |
36 | _dl_sysdep_open_zero_fill (void) | |
37 | { | |
38 | return __open ("/dev/zero", O_RDONLY); | |
39 | } | |
40 | #endif | |
41 | ||
42 | /* Read the whole contents of FILE into new mmap'd space with given | |
43 | protections. *SIZEP gets the size of the file. */ | |
44 | ||
45 | void * | |
48896b9d | 46 | internal_function |
0501d603 UD |
47 | _dl_sysdep_read_whole_file (const char *file, size_t *sizep, int prot) |
48 | { | |
49 | void *result; | |
5763742f | 50 | struct stat64 st; |
0501d603 UD |
51 | int fd = __open (file, O_RDONLY); |
52 | if (fd < 0) | |
53 | return NULL; | |
5763742f | 54 | if (__fxstat64 (_STAT_VER, fd, &st) < 0 |
49891c10 UD |
55 | /* No need to map the file if it is empty. */ |
56 | || st.st_size == 0) | |
0501d603 UD |
57 | result = NULL; |
58 | else | |
59 | { | |
60 | /* Map a copy of the file contents. */ | |
61 | result = __mmap (0, st.st_size, prot, | |
62 | #ifdef MAP_COPY | |
63 | MAP_COPY | |
64 | #else | |
65 | MAP_PRIVATE | |
66 | #endif | |
67 | #ifdef MAP_FILE | |
68 | | MAP_FILE | |
69 | #endif | |
70 | , fd, 0); | |
0413b54c | 71 | if (result == MAP_FAILED) |
0501d603 UD |
72 | result = NULL; |
73 | else | |
74 | *sizep = st.st_size; | |
75 | } | |
76 | __close (fd); | |
77 | return result; | |
78 | } | |
9498096c UD |
79 | |
80 | ||
7dea968e | 81 | /* Descriptor to write debug messages to. */ |
bc526b60 | 82 | int _dl_debug_fd = 2; |
9498096c UD |
83 | |
84 | ||
85 | void | |
7dea968e | 86 | _dl_sysdep_output (int fd, const char *msg, ...) |
9498096c UD |
87 | { |
88 | va_list ap; | |
89 | ||
90 | va_start (ap, msg); | |
91 | do | |
92 | { | |
93 | size_t len = strlen (msg); | |
2bcf29ba | 94 | __libc_write (fd, msg, len); |
9498096c | 95 | msg = va_arg (ap, const char *); |
8193034b UD |
96 | } |
97 | while (msg != NULL); | |
98 | va_end (ap); | |
99 | } | |
100 | ||
101 | ||
102 | void | |
103 | _dl_debug_message (int new_line, const char *msg, ...) | |
104 | { | |
105 | /* We print the strings we get passed one after the other but start all | |
106 | lines using the current PID. */ | |
fdacb17d | 107 | int pid = 0; |
8193034b UD |
108 | va_list ap; |
109 | ||
8193034b UD |
110 | va_start (ap, msg); |
111 | do | |
112 | if (msg[0] == '\0') | |
113 | /* Get the next argument. */ | |
114 | msg = va_arg (ap, const char *); | |
115 | else | |
116 | { | |
117 | const char *endp; | |
118 | ||
119 | /* We actually will print something in this line. So print the | |
120 | PID now if needed. */ | |
121 | if (new_line) | |
122 | { | |
14c44e2e UD |
123 | char buf[7]; |
124 | char *p; | |
fdacb17d UD |
125 | if (pid == 0) |
126 | pid = __getpid (); | |
bc526b60 | 127 | assert (pid >= 0 && pid < 100000); |
14c44e2e UD |
128 | p = _itoa_word (pid, &buf[5], 10, 0); |
129 | while (p > buf) | |
130 | *--p = '0'; | |
131 | buf[5] = ':'; | |
132 | buf[6] = '\t'; | |
2bcf29ba | 133 | __libc_write (_dl_debug_fd, buf, 7); |
8193034b UD |
134 | new_line = 0; |
135 | } | |
136 | ||
14c44e2e UD |
137 | endp = msg + strcspn (msg, "\n"); |
138 | if (*endp == '\0') | |
8193034b | 139 | { |
14c44e2e | 140 | __libc_write (_dl_debug_fd, msg, endp - msg); |
8193034b UD |
141 | msg = va_arg (ap, const char *); |
142 | } | |
143 | else | |
144 | { | |
2bcf29ba | 145 | __libc_write (_dl_debug_fd, msg, endp - msg + 1); |
8193034b UD |
146 | msg = endp + 1; |
147 | new_line = 1; | |
148 | } | |
149 | } | |
150 | while (msg != NULL); | |
9498096c UD |
151 | va_end (ap); |
152 | } |