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* elf/Versions [ld]: Don't export _dl_debug_message anymore.  Export
	_dl_debug_printf.
	* elf/dl-misc.c: Remove definition of _dl_sysdep_output and
	_dl_debug_message.  Define _dl_debug_vdprintf, _dl_debug_printf,
	_dl_debug_printf_c, and _dl_printf.
	* sysdeps/generic/ldsodefs.h: Don't declare _dl_sysdep_output,
	_dl_debug_message, _dl_sysdep_message, _dl_sysdep_error, and
	_dl_sysdep_fatal.  Declare _dl_debug_printf, _dl_debug_printf_c,
	_dl_printf, _dl_error_printf, and _dl_fatal_printf.
	* elf/dl-close.c: Replace use of old output functions with the new
	ones.
	* elf/dl-deps.c: Likewise.
	* elf/dl-error.c: Likewise.
	* elf/dl-fini.c: Likewise.
	* elf/dl-init.c: Likewise.
	* elf/dl-load.c: Likewise.
	* elf/dl-lookup.c: Likewise.
	* elf/dl-minimal.c: Likewise.
	* elf/dl-open.c: Likewise.
	* elf/dl-profile.c: Likewise.
	* elf/dl-reloc.c: Likewise.
	* elf/dl-version.c: Likewise.
	* elf/do-lookup.h: Likewise.
	* elf/rtld.c: Likewise.
	* sysdeps/generic/dl-cache.c: Likewise.
	* sysdeps/generic/dl-sysdep.c: Likewise.
	* sysdeps/generic/libc-start.c: Likewise.
	* sysdeps/i386/dl-machine.h: Likewise.
	* sysdeps/unix/sysv/linux/dl-osinfo.h: Likewise.
	* sysdeps/unix/sysv/linux/i386/dl-librecon.h: Likewise.
	* sysdeps/unix/sysv/linux/i386/dl-procinfo.h: Likewise.

	* sysdeps/generic/ldsodefs.h: Remove _dl_secure declaration.

	* dlfcn/Makefile: Don't run tstatexit test unless .hidden is
	supported by assembler.
This commit is contained in:
Ulrich Drepper
2001-02-28 06:24:03 +00:00
parent edd8e70fea
commit b5ba065963
5 changed files with 256 additions and 94 deletions
Download Patch File Download Diff File Expand all files Collapse all files

247
elf/dl-misc.c
View File

@ -1,5 +1,5 @@
/* Miscellaneous support functions for dynamic linker
Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -20,12 +20,16 @@
#include <assert.h>
#include <fcntl.h>
#include <ldsodefs.h>
#include <limits.h>
#include <link.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <stdio-common/_itoa.h>
#ifndef MAP_ANON
@ -82,71 +86,190 @@ _dl_sysdep_read_whole_file (const char *file, size_t *sizep, int prot)
int _dl_debug_fd = 2;
void
_dl_sysdep_output (int fd, const char *msg, ...)
/* Bare-bone printf implementation. This function only knows about
the formats and flags needed and can handle only up to 64 stripes in
the output. */
static void
_dl_debug_vdprintf (int fd, int tag_p, const char *fmt, va_list arg)
{
va_list ap;
const int niovmax = 64;
struct iovec iov[niovmax];
int niov = 0;
pid_t pid = 0;
char pidbuf[7];
va_start (ap, msg);
do
while (*fmt != '\0')
{
size_t len = strlen (msg);
__libc_write (fd, msg, len);
msg = va_arg (ap, const char *);
}
while (msg != NULL);
va_end (ap);
}
const char *startp = fmt;
void
_dl_debug_message (int new_line, const char *msg, ...)
{
/* We print the strings we get passed one after the other but start all
lines using the current PID. */
int pid = 0;
va_list ap;
va_start (ap, msg);
do
if (msg[0] == '\0')
/* Get the next argument. */
msg = va_arg (ap, const char *);
else
{
const char *endp;
/* We actually will print something in this line. So print the
PID now if needed. */
if (new_line)
{
char buf[7];
char *p;
if (pid == 0)
if (tag_p > 0)
{
/* Generate the tag line once. It consists of the PID and a
colon followed by a tab. */
if (pid == 0)
{
char *p;
pid = __getpid ();
assert (pid >= 0 && pid < 100000);
p = _itoa_word (pid, &buf[5], 10, 0);
while (p > buf)
*--p = '0';
buf[5] = ':';
buf[6] = '\t';
__libc_write (_dl_debug_fd, buf, 7);
new_line = 0;
}
assert (pid >= 0 && pid < 100000);
p = _itoa_word (pid, &pidbuf[5], 10, 0);
while (p > pidbuf)
*--p = '0';
pidbuf[5] = ':';
pidbuf[6] = '\t';
}
endp = msg + strcspn (msg, "\n");
if (*endp == '\0')
{
__libc_write (_dl_debug_fd, msg, endp - msg);
msg = va_arg (ap, const char *);
}
else
{
__libc_write (_dl_debug_fd, msg, endp - msg + 1);
msg = endp + 1;
new_line = 1;
}
}
while (msg != NULL);
va_end (ap);
/* Append to the output. */
assert (niov < niovmax);
iov[niov].iov_len = 7;
iov[niov++].iov_base = pidbuf;
/* No more tags until we see the next newline. */
tag_p = -1;
}
/* Skip everything except % and \n (if tags are needed). */
while (*fmt != '\0' && *fmt != '%' && (! tag_p || *fmt != '\n'))
++fmt;
/* Append constant string. */
assert (niov < niovmax);
if ((iov[niov].iov_len = fmt - startp) != 0)
iov[niov++].iov_base = (char *) startp;
if (*fmt == '%')
{
/* It is a format specifier. */
char fill = ' ';
int width = -1;
#if LONG_MAX != INT_MAX
int long_mod = 0;
#endif
/* Recognize zero-digit fill flag. */
if (*++fmt == '0')
{
fill = '0';
++fmt;
}
/* See whether with comes from a parameter. Note that no other
way to specify the width is implemented. */
if (*fmt == '*')
{
width = va_arg (arg, int);
++fmt;
}
/* Recognize the l modifier. It is only important on some
platforms where long and int have a different size. We
can use the same code for size_t. */
if (*fmt == 'l' || *fmt == 'Z')
{
#if LONG_MAX != INT_MAX
long_mod = 1;
#endif
++fmt;
}
switch (*fmt)
{
/* Integer formatting. */
case 'u':
case 'x':
{
/* We have to make a difference if long and int have a
different size. */
#if LONG_MAX != INT_MAX
unsigned long int num = (long_mod
? va_arg (arg, unsigned long int);
: va_arg (arg, unsigned int));
#else
unsigned long int num = va_arg (arg, unsigned int);
#endif
/* We use alloca() to allocate the buffer with the most
pessimistic guess for the size. Using alloca() allows
having more than one integer formatting in a call. */
char *buf = (char *) alloca (3 * sizeof (unsigned long int));
char *endp = &buf[3 * sizeof (unsigned long int)];
char *cp = _itoa_word (num, endp, *fmt == 'x' ? 16 : 10, 0);
/* Pad to the width the user specified. */
if (width != -1)
while (endp - cp < width)
*--cp = fill;
iov[niov].iov_base = cp;
iov[niov].iov_len = endp - cp;
++niov;
}
break;
case 's':
/* Get the string argument. */
iov[niov].iov_base = va_arg (arg, char *);
iov[niov].iov_len = strlen (iov[niov].iov_base);
++niov;
break;
default:
assert (! "invalid format specifier");
}
++fmt;
}
else if (*fmt == '\n')
{
/* See whether we have to print a single newline character. */
if (fmt == startp)
{
iov[niov].iov_base = (char *) startp;
iov[niov++].iov_len = 1;
}
else
/* No, just add it to the rest of the string. */
++iov[niov - 1].iov_len;
/* Next line, print a tag again. */
tag_p = 1;
++fmt;
}
}
/* Finally write the result. */
__writev (fd, iov, niov);
}
/* Write to debug file. */
void
_dl_debug_printf (const char *fmt, ...)
{
va_list arg;
va_start (arg, fmt);
_dl_debug_vdprintf (_dl_debug_fd, 1, fmt, arg);
va_end (arg);
}
/* Write to debug file but don't start with a tag. */
void
_dl_debug_printf_c (const char *fmt, ...)
{
va_list arg;
va_start (arg, fmt);
_dl_debug_vdprintf (_dl_debug_fd, -1, fmt, arg);
va_end (arg);
}
/* Write the given file descriptor. */
void
_dl_dprintf (int fd, const char *fmt, ...)
{
va_list arg;
va_start (arg, fmt);
_dl_debug_vdprintf (fd, 0, fmt, arg);
va_end (arg);
}