mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-20 12:00:06 +00:00
b0d20a87b5
* Makerules (no-whole-archive): Test $(have-no-whole-archive), not $(libc_cv_ld_no_whole_archive). Sat Apr 20 17:07:17 1996 Ulrich Drepper <drepper@cygnus.com> * assert/assert.h, ctype/ctype.h, dirent/dirent.h, errno.h, grp/grp.h, io/fcntl.h, io/sys/stat.h, io/utime.h, locale/locale.h, math/math.h, misc/nlist.h, misc/sgtty.h, misc/sys/file.h, misc/sys/ioctl.h, misc/sys/uio.h, posix/sys/times.h, posix/sys/types.h, posix/sys/utsname.h, posix/sys/wait.h, posix/tar.h, posix/wordexp.h, pwd/pwd.h, resource/sys/vlimit.h, resource/sys/vtimes.h, setjmp/setjmp.h, signal/signal.h, stdio-common/printf.h, stdlib/alloca.h, stdlib/stdlib.h, string/string.h, sysdeps/generic/sigaction.h, sysdeps/generic/sigset.h, sysdeps/generic/sys/ptrace.h, sysdeps/generic/sys/ptrace.h, sysdeps/unix/bsd/osf/sigaction.h, sysdeps/unix/sysv/linux/sys/ptrace.h, sysdeps/unix/sysv/minix/sigaction.h, sysdeps/unix/sysv/sco3.2.4/sigaction.h, sysdeps/unix/sysv/sysv4/sigaction.h, sysdeps/unix/sysv/sysv4/sigset.h, termios/termios.h, time/sys/time.h, time/time.h: Fix copyright comment. * sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): If uids and gids are not given in stack aux vector, fetch them with syscalls.
149 lines
3.2 KiB
C
149 lines
3.2 KiB
C
/* Operating system support for run-time dynamic linker. Generic Unix version.
|
|
Copyright (C) 1995, 96 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
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
#include <elf.h>
|
|
#include <sys/types.h>
|
|
#include <fcntl.h>
|
|
#include <link.h>
|
|
#include <unistd.h>
|
|
|
|
extern int _dl_argc;
|
|
extern char **_dl_argv;
|
|
extern char **_environ;
|
|
extern void _start (void);
|
|
extern int _dl_secure;
|
|
|
|
Elf32_Addr
|
|
_dl_sysdep_start (void **start_argptr,
|
|
void (*dl_main) (const Elf32_Phdr *phdr, Elf32_Word phnum,
|
|
Elf32_Addr *user_entry))
|
|
{
|
|
const Elf32_Phdr *phdr;
|
|
Elf32_Word phnum;
|
|
Elf32_Addr user_entry;
|
|
Elf32_auxv_t *av;
|
|
uid_t uid, euid;
|
|
gid_t gid, egid;
|
|
unsigned int seen;
|
|
|
|
user_entry = (Elf32_Addr) &_start;
|
|
_dl_argc = *(int *) start_argptr;
|
|
_dl_argv = (char **) start_argptr + 1;
|
|
_environ = &_dl_argv[_dl_argc + 1];
|
|
start_argptr = (void **) _environ;
|
|
while (*start_argptr)
|
|
++start_argptr;
|
|
|
|
seen = 0;
|
|
#define M(type) (1 << (type))
|
|
|
|
for (av = (void *) ++start_argptr;
|
|
av->a_type != AT_NULL;
|
|
seen |= M ((++av)->a_type))
|
|
switch (av->a_type)
|
|
{
|
|
case AT_PHDR:
|
|
phdr = av->a_un.a_ptr;
|
|
break;
|
|
case AT_PHNUM:
|
|
phnum = av->a_un.a_val;
|
|
break;
|
|
case AT_ENTRY:
|
|
user_entry = av->a_un.a_val;
|
|
break;
|
|
case AT_UID:
|
|
uid = av->a_un.a_val;
|
|
break;
|
|
case AT_GID:
|
|
gid = av->a_un.a_val;
|
|
break;
|
|
case AT_EUID:
|
|
euid = av->a_un.a_val;
|
|
break;
|
|
case AT_EGID:
|
|
egid = av->a_un.a_val;
|
|
break;
|
|
}
|
|
|
|
/* Linux doesn't provide us with any of these values on the stack
|
|
when the dynamic linker is run directly as a program. */
|
|
|
|
#define SEE(UID, uid) if ((seen & M (AT_##UID)) == 0) uid = __get##uid ()
|
|
SEE (UID, uid);
|
|
SEE (GID, gid);
|
|
SEE (EUID, euid);
|
|
SEE (EGID, egid);
|
|
|
|
|
|
_dl_secure = uid != euid || gid != egid;
|
|
|
|
#ifdef DL_SYSDEP_INIT
|
|
DL_SYSDEP_INIT;
|
|
#endif
|
|
|
|
(*dl_main) (phdr, phnum, &user_entry);
|
|
return user_entry;
|
|
}
|
|
|
|
void
|
|
_dl_sysdep_start_cleanup (void)
|
|
{
|
|
}
|
|
|
|
int
|
|
_dl_sysdep_open_zero_fill (void)
|
|
{
|
|
return open ("/dev/zero", O_RDONLY);
|
|
}
|
|
|
|
#include <stdarg.h>
|
|
|
|
void
|
|
_dl_sysdep_fatal (const char *msg, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start (ap, msg);
|
|
do
|
|
{
|
|
size_t len = strlen (msg);
|
|
write (STDERR_FILENO, msg, len);
|
|
msg = va_arg (ap, const char *);
|
|
} while (msg);
|
|
va_end (ap);
|
|
|
|
_exit (127);
|
|
}
|
|
|
|
|
|
void
|
|
_dl_sysdep_message (const char *msg, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start (ap, msg);
|
|
do
|
|
{
|
|
size_t len = strlen (msg);
|
|
write (STDOUT_FILENO, msg, len);
|
|
msg = va_arg (ap, const char *);
|
|
} while (msg);
|
|
va_end (ap);
|
|
}
|