glibc/sysdeps/generic/dl-sysdep.c

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/* Operating system support for run-time dynamic linker. Generic Unix version.
Sun Feb 18 15:08:10 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/posix/utimes.c (__utimes): There are 1000000 usecs in a sec. Sun Feb 18 13:56:00 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * elf/Makefile, time/Makefile: Make `all' the default target. Mon Feb 19 18:09:04 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu> * misc/sys/ptrace.h: Moved to ... * sysdeps/generic/sys/ptrace.h: ... here. * sys/ptrace.h: File removed. Sun Feb 18 12:13:07 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/sysv/linux/Makefile (headers): Add fpu_control.h. * sysdeps/unix/sysv/linux/i386/sysdep.S (errno): Put it into .bss so that the symbol alias works. * sysdeps/unix/sysv/linux/m68k/fpu_control.h (_FPU_SETCW): Corrected. * sysdeps/unix/sysv/linux/resourcebits.h: New file. * sysdeps/unix/sysv/linux/sys/ptrace.h: New file. * sysdeps/unix/sysv/linux/syscalls.list: Add getegid, geteuid, getppid and reboot. * sysdeps/unix/sysv/linux/sysconf.c: Special version that does not use getdtablesize. Sat Feb 17 10:30:21 1996 David Mosberger-Tang <davidm@AZStarNet.com> * stdio-common/printf_fp.c, stdlib/strtod.c, sysdeps/ieee754/dbl2mpn.c, sysdeps/ieee754/ldbl2mpn.c, sysdeps/ieee754/mpn2dbl.c, sysdeps/ieee754/mpn2ldbl.c: Cast left operands of shift instructions to `long' where necessary. Thu Feb 15 20:04:50 1996 Ulrich Drepper <drepper@gnu.ai.mit.edu> * stdlib/fpioconst.h: Introduce new constant _FPIO_CONST_OFFSET. * stdio-common/printf_fp.c, stdlib/strtod.c: Use _FPIO_CONST_OFFSET to correctly access MPN array depending on architecture.
1996-02-19 23:14:44 +00:00
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>
Sat Jul 22 01:56:03 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> * sysdeps/unix/i386/sysdep.h (JUMPTARGET): New macro; use name@PLT #ifdef PIC. (PSEUDO): Use JUMPTARGET(syscall_error) in jump insn. * sysdeps/unix/i386/syscall.S: Use JUMPTARGET(syscall_error) in jump insn. * sysdeps/unix/sysv/sysv4/linux/i386/sysdep.h: Rewritten. * sysdeps/unix/sysv/sysv4/linux/i386/syscall.S: New file. * sysdeps/unix/sysv/sysv4/linux/i386/socket.S: Include <sys/socketcall.h>. Save %ebx in call-clobbered %edx instead of stack. Use JUMPTARGET(syscall_error) in jump insn. * Makeconfig (+gccwarn): Add -Wbad-function-cast -Wconversion. * sysdeps/unix/i386/sysdep.h (ENTRY): Use ASM_GLOBAL_DIRECTIVE and ASM_TYPE_DIRECTIVE. (ASM_TYPE_DIRECTIVE): New macro; defined using `.type' #ifdef ELF. * sysdeps/unix/sysv/sysv4/linux/i386/sysdep.S (__syscall_error): Rewritten, #include'ing unix/i386/sysdep.S for most of the code. * sysdeps/unix/i386/sysdep.S [PIC]: Store into `errno' through the GOT. Fixes to help Linux, inspired by drepper's work: * configure.in (os=linux*): Use unix/sysv/sysv4 for $base_os, instead of unix/sysv. * sysdeps/posix/utimes.c: New file. * sysdeps/generic/getdomain.c: New file. * sysdeps/i386/init-first.c: Removed gratuitous #include <hurd.h>. * sysdeps/generic/dl-sysdep.c: Include <unistd.h> and declare externals _dl_argc, _dl_argc, and _environ. * sysdeps/unix/sysv/linux/{accept,connect,getsockname,rename, socketpair,waitpid,bind,getpeername,listen,setsid,wait4}.S: Moved to new directory sysdeps/unix/sysv/sysv4/linux. * sysdeps/unix/sysv/linux: Directory removed. * sysdeps/unix/sysv/i386/linux/{socket.S,sysdep.h,sysdep.S}: Moved to new directory sysdeps/unix/sysv/sysv4/linux/i386. * sysdeps/unix/sysv/linux/i386: Directory removed.
1995-07-22 10:48:43 +00:00
#include <unistd.h>
#include <stdarg.h>
#include <string.h>
Sat Jul 22 01:56:03 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> * sysdeps/unix/i386/sysdep.h (JUMPTARGET): New macro; use name@PLT #ifdef PIC. (PSEUDO): Use JUMPTARGET(syscall_error) in jump insn. * sysdeps/unix/i386/syscall.S: Use JUMPTARGET(syscall_error) in jump insn. * sysdeps/unix/sysv/sysv4/linux/i386/sysdep.h: Rewritten. * sysdeps/unix/sysv/sysv4/linux/i386/syscall.S: New file. * sysdeps/unix/sysv/sysv4/linux/i386/socket.S: Include <sys/socketcall.h>. Save %ebx in call-clobbered %edx instead of stack. Use JUMPTARGET(syscall_error) in jump insn. * Makeconfig (+gccwarn): Add -Wbad-function-cast -Wconversion. * sysdeps/unix/i386/sysdep.h (ENTRY): Use ASM_GLOBAL_DIRECTIVE and ASM_TYPE_DIRECTIVE. (ASM_TYPE_DIRECTIVE): New macro; defined using `.type' #ifdef ELF. * sysdeps/unix/sysv/sysv4/linux/i386/sysdep.S (__syscall_error): Rewritten, #include'ing unix/i386/sysdep.S for most of the code. * sysdeps/unix/i386/sysdep.S [PIC]: Store into `errno' through the GOT. Fixes to help Linux, inspired by drepper's work: * configure.in (os=linux*): Use unix/sysv/sysv4 for $base_os, instead of unix/sysv. * sysdeps/posix/utimes.c: New file. * sysdeps/generic/getdomain.c: New file. * sysdeps/i386/init-first.c: Removed gratuitous #include <hurd.h>. * sysdeps/generic/dl-sysdep.c: Include <unistd.h> and declare externals _dl_argc, _dl_argc, and _environ. * sysdeps/unix/sysv/linux/{accept,connect,getsockname,rename, socketpair,waitpid,bind,getpeername,listen,setsid,wait4}.S: Moved to new directory sysdeps/unix/sysv/sysv4/linux. * sysdeps/unix/sysv/linux: Directory removed. * sysdeps/unix/sysv/i386/linux/{socket.S,sysdep.h,sysdep.S}: Moved to new directory sysdeps/unix/sysv/sysv4/linux/i386. * sysdeps/unix/sysv/linux/i386: Directory removed.
1995-07-22 10:48:43 +00:00
extern int _dl_argc;
extern char **_dl_argv;
extern char **_environ;
Sat Sep 16 17:47:19 1995 Ulrich Drepper <drepper@ipd.info.uni-karlsruhe.de> * elf/elf.h (AT_GID): Fix typo: Read -> Real. * misc/efgvt_r.c: New file. Reentrant version of [efg]cvt functions. * misc/efgcvt.c: Rewrite to use reentrant functions. * misc/hsearch_r.c: New file. Reentrant version of functions from hsearch family. * misc/hsearch.c, misc/tsearch.c: New files. * misc/Makefile (routines): Add efgcvt_r, hsearch_r, hsearch, tsearch. * posix/unistd.h (ttyname_r): Add prototype for new function. * stdlib/drand48_r.c, stdlib/erand48_r.c, stdlib/jrand48_r.c, stdlib/lrand48_r.c, stdlib/mrand48_r.c, stdlib/nrand48_r.c, stdlib/seed48_r.c, stdlib/srand48_r.c, stdlib/lcong48_r.c, stdlib/drand48-iter.c: New files implementing reentrant versions of functions from drand48 family. * stdlib/seed48.c, stdlib/drand48.c, stdlib/erand48.c, stdlib/jrand48.c, stdlib/lrand48.c, stdlib/mrand48.c, stdlib/nrand48.c, stdlib/srand48.c, stdlib/lcong48.c: Rewrite to use reentrant versions. * stdlib/a64l.c, stdlib/l64a.c: New files. Implement a64l() and l64a() functions from SysV library. * stdlib/Makefile (routines): Add drand48_r, erand48_r, lrand48_r, nrand48_r, mrand48_r, jrand48_r, srand48_r, seed48_r, lcong48_r, drand48-iter, a64l, l64a. * stdlib/stdlib.h: Declare them. * stdlib/random_r.c: New file. Reentrant version of functions from random family. * stdlib/stdlib.h: Declare them. * stdlib/random.c: Rewrite to use reentrant functions. * string/strerror_r.c: New file. Reentrant version. * string/strerror.c: Change for new _strerror_internal form. * string/Makefile (routines): Add strerror_r. * sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): Set default value of user_entry to `_start'. Close AT_ENTRY case with `break'. * sysdeps/generic/strstr.c: New and much faster implementation by Stephen R. van den Berg. * sysdeps/generic/_strerror.c: _strerror_internal now takes three argument and has and explicit buffer length. * sysdeps/mach/_strerror.c: Change for new interface with three arguments. * stdio/perror.c, stdio/vfprintf.c: Callers changed. * sysdeps/mach/hurd/ttyname_r.c: New file. Reentrant version. * sysdeps/posix/ttyname_r.c: New file. Reentrant version. * sysdeps/stub/ttyname_r: New file. Define as dummy function. * sysdeps/posix/utimes.c: Include <utime.h> for prototype. (utimes): First parameter to utime must be file, not path. * sysdeps/posix/sysconf.c (__sysconf): Test for CLK_TCK in case _SC_CLK_TCK and return it when available. Test for STREAM_MAX in case _SC_STREAM_MAX and return it when available. Add case for _SC_2_LOCALEDEF which is now available. * posix/sys/types.h [__USE_SVID] (key_t): New type. * sysvipc/Makefile, sysvipc/ftok.c, sysvipc/sys/ipc.h, sysvipc/sys/msg.h, sysvipc/sys/sem.h, sysvipc/sys/shm.h, sysdeps/stub/sys/msq_buf.h, sysdeps/stub/sys/sem_buf.h, sysdeps/stub/sys/shm_buf.h, sysdeps/stub/sys/ipc_buf.h, sysdeps/stub/semctl.c, sysdeps/stub/semget.c, sysdeps/stub/semop.c, sysdeps/stub/shmat.c, sysdeps/stub/shmctl.c, sysdeps/stub/shmdt.c, sysdeps/stub/shmget.c, sysdeps/stub/msgctl.c, sysdeps/stub/msgget.c, sysdeps/stub/msgrcv.c, sysdeps/stub/msgsnd.c: New files. Add implementation of System V IPC.
1995-09-17 20:23:15 +00:00
extern void _start (void);
Sun Feb 18 15:08:10 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/posix/utimes.c (__utimes): There are 1000000 usecs in a sec. Sun Feb 18 13:56:00 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * elf/Makefile, time/Makefile: Make `all' the default target. Mon Feb 19 18:09:04 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu> * misc/sys/ptrace.h: Moved to ... * sysdeps/generic/sys/ptrace.h: ... here. * sys/ptrace.h: File removed. Sun Feb 18 12:13:07 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/sysv/linux/Makefile (headers): Add fpu_control.h. * sysdeps/unix/sysv/linux/i386/sysdep.S (errno): Put it into .bss so that the symbol alias works. * sysdeps/unix/sysv/linux/m68k/fpu_control.h (_FPU_SETCW): Corrected. * sysdeps/unix/sysv/linux/resourcebits.h: New file. * sysdeps/unix/sysv/linux/sys/ptrace.h: New file. * sysdeps/unix/sysv/linux/syscalls.list: Add getegid, geteuid, getppid and reboot. * sysdeps/unix/sysv/linux/sysconf.c: Special version that does not use getdtablesize. Sat Feb 17 10:30:21 1996 David Mosberger-Tang <davidm@AZStarNet.com> * stdio-common/printf_fp.c, stdlib/strtod.c, sysdeps/ieee754/dbl2mpn.c, sysdeps/ieee754/ldbl2mpn.c, sysdeps/ieee754/mpn2dbl.c, sysdeps/ieee754/mpn2ldbl.c: Cast left operands of shift instructions to `long' where necessary. Thu Feb 15 20:04:50 1996 Ulrich Drepper <drepper@gnu.ai.mit.edu> * stdlib/fpioconst.h: Introduce new constant _FPIO_CONST_OFFSET. * stdio-common/printf_fp.c, stdlib/strtod.c: Use _FPIO_CONST_OFFSET to correctly access MPN array depending on architecture.
1996-02-19 23:14:44 +00:00
extern int _dl_secure;
ElfW(Addr)
_dl_sysdep_start (void **start_argptr,
void (*dl_main) (const ElfW(Phdr) *phdr, ElfW(Word) phnum,
ElfW(Addr) *user_entry))
{
const ElfW(Phdr) *phdr;
ElfW(Word) phnum;
ElfW(Addr) user_entry;
ElfW(auxv_t) *av;
uid_t uid, euid;
gid_t gid, egid;
unsigned int seen;
user_entry = (ElfW(Addr)) &_start;
_dl_argc = *(long *) 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;
Sat Sep 16 17:47:19 1995 Ulrich Drepper <drepper@ipd.info.uni-karlsruhe.de> * elf/elf.h (AT_GID): Fix typo: Read -> Real. * misc/efgvt_r.c: New file. Reentrant version of [efg]cvt functions. * misc/efgcvt.c: Rewrite to use reentrant functions. * misc/hsearch_r.c: New file. Reentrant version of functions from hsearch family. * misc/hsearch.c, misc/tsearch.c: New files. * misc/Makefile (routines): Add efgcvt_r, hsearch_r, hsearch, tsearch. * posix/unistd.h (ttyname_r): Add prototype for new function. * stdlib/drand48_r.c, stdlib/erand48_r.c, stdlib/jrand48_r.c, stdlib/lrand48_r.c, stdlib/mrand48_r.c, stdlib/nrand48_r.c, stdlib/seed48_r.c, stdlib/srand48_r.c, stdlib/lcong48_r.c, stdlib/drand48-iter.c: New files implementing reentrant versions of functions from drand48 family. * stdlib/seed48.c, stdlib/drand48.c, stdlib/erand48.c, stdlib/jrand48.c, stdlib/lrand48.c, stdlib/mrand48.c, stdlib/nrand48.c, stdlib/srand48.c, stdlib/lcong48.c: Rewrite to use reentrant versions. * stdlib/a64l.c, stdlib/l64a.c: New files. Implement a64l() and l64a() functions from SysV library. * stdlib/Makefile (routines): Add drand48_r, erand48_r, lrand48_r, nrand48_r, mrand48_r, jrand48_r, srand48_r, seed48_r, lcong48_r, drand48-iter, a64l, l64a. * stdlib/stdlib.h: Declare them. * stdlib/random_r.c: New file. Reentrant version of functions from random family. * stdlib/stdlib.h: Declare them. * stdlib/random.c: Rewrite to use reentrant functions. * string/strerror_r.c: New file. Reentrant version. * string/strerror.c: Change for new _strerror_internal form. * string/Makefile (routines): Add strerror_r. * sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): Set default value of user_entry to `_start'. Close AT_ENTRY case with `break'. * sysdeps/generic/strstr.c: New and much faster implementation by Stephen R. van den Berg. * sysdeps/generic/_strerror.c: _strerror_internal now takes three argument and has and explicit buffer length. * sysdeps/mach/_strerror.c: Change for new interface with three arguments. * stdio/perror.c, stdio/vfprintf.c: Callers changed. * sysdeps/mach/hurd/ttyname_r.c: New file. Reentrant version. * sysdeps/posix/ttyname_r.c: New file. Reentrant version. * sysdeps/stub/ttyname_r: New file. Define as dummy function. * sysdeps/posix/utimes.c: Include <utime.h> for prototype. (utimes): First parameter to utime must be file, not path. * sysdeps/posix/sysconf.c (__sysconf): Test for CLK_TCK in case _SC_CLK_TCK and return it when available. Test for STREAM_MAX in case _SC_STREAM_MAX and return it when available. Add case for _SC_2_LOCALEDEF which is now available. * posix/sys/types.h [__USE_SVID] (key_t): New type. * sysvipc/Makefile, sysvipc/ftok.c, sysvipc/sys/ipc.h, sysvipc/sys/msg.h, sysvipc/sys/sem.h, sysvipc/sys/shm.h, sysdeps/stub/sys/msq_buf.h, sysdeps/stub/sys/sem_buf.h, sysdeps/stub/sys/shm_buf.h, sysdeps/stub/sys/ipc_buf.h, sysdeps/stub/semctl.c, sysdeps/stub/semget.c, sysdeps/stub/semop.c, sysdeps/stub/shmat.c, sysdeps/stub/shmctl.c, sysdeps/stub/shmdt.c, sysdeps/stub/shmget.c, sysdeps/stub/msgctl.c, sysdeps/stub/msgget.c, sysdeps/stub/msgrcv.c, sysdeps/stub/msgsnd.c: New files. Add implementation of System V IPC.
1995-09-17 20:23:15 +00:00
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);
}
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);
}