1 /* Miscellaneous support functions for dynamic linker
2 Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
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 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
30 #include <sys/param.h>
33 #include <stdio-common/_itoa.h>
36 /* This is the only dl-sysdep.c function that is actually needed at run-time
40 _dl_sysdep_open_zero_fill (void)
42 return __open ("/dev/zero", O_RDONLY);
46 /* Read the whole contents of FILE into new mmap'd space with given
47 protections. *SIZEP gets the size of the file. */
51 _dl_sysdep_read_whole_file (const char *file, size_t *sizep, int prot)
55 int fd = __open (file, O_RDONLY);
58 if (__fxstat64 (_STAT_VER, fd, &st) < 0
59 /* No need to map the file if it is empty. */
64 /* Map a copy of the file contents. */
65 result = __mmap (0, st.st_size, prot,
75 if (result == MAP_FAILED)
85 /* Descriptor to write debug messages to. */
89 /* Bare-bone printf implementation. This function only knows about
90 the formats and flags needed and can handle only up to 64 stripes in
93 _dl_debug_vdprintf (int fd, int tag_p, const char *fmt, va_list arg)
95 const int niovmax = 64;
96 struct iovec iov[niovmax];
103 const char *startp = fmt;
107 /* Generate the tag line once. It consists of the PID and a
108 colon followed by a tab. */
113 assert (pid >= 0 && pid < 100000);
114 p = _itoa_word (pid, &pidbuf[5], 10, 0);
121 /* Append to the output. */
122 assert (niov < niovmax);
123 iov[niov].iov_len = 7;
124 iov[niov++].iov_base = pidbuf;
126 /* No more tags until we see the next newline. */
130 /* Skip everything except % and \n (if tags are needed). */
131 while (*fmt != '\0' && *fmt != '%' && (! tag_p || *fmt != '\n'))
134 /* Append constant string. */
135 assert (niov < niovmax);
136 if ((iov[niov].iov_len = fmt - startp) != 0)
137 iov[niov++].iov_base = (char *) startp;
141 /* It is a format specifier. */
144 #if LONG_MAX != INT_MAX
148 /* Recognize zero-digit fill flag. */
155 /* See whether with comes from a parameter. Note that no other
156 way to specify the width is implemented. */
159 width = va_arg (arg, int);
163 /* Recognize the l modifier. It is only important on some
164 platforms where long and int have a different size. We
165 can use the same code for size_t. */
166 if (*fmt == 'l' || *fmt == 'Z')
168 #if LONG_MAX != INT_MAX
176 /* Integer formatting. */
180 /* We have to make a difference if long and int have a
182 #if LONG_MAX != INT_MAX
183 unsigned long int num = (long_mod
184 ? va_arg (arg, unsigned long int)
185 : va_arg (arg, unsigned int));
187 unsigned long int num = va_arg (arg, unsigned int);
189 /* We use alloca() to allocate the buffer with the most
190 pessimistic guess for the size. Using alloca() allows
191 having more than one integer formatting in a call. */
192 char *buf = (char *) alloca (3 * sizeof (unsigned long int));
193 char *endp = &buf[3 * sizeof (unsigned long int)];
194 char *cp = _itoa_word (num, endp, *fmt == 'x' ? 16 : 10, 0);
196 /* Pad to the width the user specified. */
198 while (endp - cp < width)
201 iov[niov].iov_base = cp;
202 iov[niov].iov_len = endp - cp;
208 /* Get the string argument. */
209 iov[niov].iov_base = va_arg (arg, char *);
210 iov[niov].iov_len = strlen (iov[niov].iov_base);
215 assert (! "invalid format specifier");
219 else if (*fmt == '\n')
221 /* See whether we have to print a single newline character. */
224 iov[niov].iov_base = (char *) startp;
225 iov[niov++].iov_len = 1;
228 /* No, just add it to the rest of the string. */
229 ++iov[niov - 1].iov_len;
231 /* Next line, print a tag again. */
237 /* Finally write the result. */
238 __writev (fd, iov, niov);
242 /* Write to debug file. */
244 _dl_debug_printf (const char *fmt, ...)
249 _dl_debug_vdprintf (_dl_debug_fd, 1, fmt, arg);
254 /* Write to debug file but don't start with a tag. */
256 _dl_debug_printf_c (const char *fmt, ...)
261 _dl_debug_vdprintf (_dl_debug_fd, -1, fmt, arg);
266 /* Write the given file descriptor. */
268 _dl_dprintf (int fd, const char *fmt, ...)
273 _dl_debug_vdprintf (fd, 0, fmt, arg);