glibc/elf/dl-reloc.c
Ulrich Drepper afd4eb3759 update from main archive 961116
Sun Nov 17 03:13:57 1996  Ulrich Drepper  <drepper@cygnus.com>

	* db/makedb.c: Update and reformat copyright.
	* elf/Makefile: Likewise.
	* elf/dl-close.c: Likewise.
	* elf/dl-debug.c: Likewise.
	* 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-object.c: Likewise.
	* elf/dl-open.c: Likewise.
	* elf/dl-reloc.c: Likewise.
	* elf/dl-runtime.c: Likewise.
	* elf/dl-support.c: Likewise.
	* elf/dl-symbol.c: Likewise.
	* elf/dladdr.c: Likewise.
	* elf/dlclose.c: Likewise.
	* elf/dlerror.c: Likewise.
	* elf/dlopen.c: Likewise.
	* elf/dlsym.c: Likewise.
	* elf/do-rel.h: Likewise.
	* elf/dynamic-link.h: Likewise.
	* elf/eval.c: Likewise.
	* elf/rtld.c: Likewise.
	* inet/ether_hton.c: Likewise.
	* inet/ether_ntoh.c: Likewise.
	* inet/ether_line.c: Likewise.
	* inet/getnetgrent_r.c: Likewise.

	* inet/Makefile (+gccwarn): Remove definition.
	Instead set CFLAGS-rcmd.c, CFLAGS-rexec.c, and CFLAGS-ruserpass.c
	to `-w'.
	* inet/aliases.h: Add C++ protection.
	* inet/ether_hton.c: Add prototype for __nss_ethers_lookup.
	(ether_hostton): Remove unused variable result.
	* inet/ether_ntoh.c: Likewise.
	* inet/ether_line.c: Include <ctype.h> and <string.h>.
	* inet/getnetgrent_r.c: Include <stdlib.h>.
	Use casts to prevent warnings.
	(innetgr): Initialize `known' and `needed'.
	* inet/inet_net.c: Make local variable `i' of type u_int32_t.
	* nss/getXXbyYY_r.c (INTERNAL (REENTRANT_NAME)) [NEED__RES]: Don't
	return NULL.  Instead set *RESULT to NULL and return -1.
	* nss/getXXent_r.c (INTERNAL (REENTRANT_GETNAME)): Likewise.
	(SETFUNC_NAME, ENDFUNC_NAME) [NEED__RES]: Don't return anything.

	* nss/nss_files/files-alias.c: Debug function.  I didn't worked at
	all before.

Sat Nov 16 15:25:34 1996  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/posix/readv.c: Don't use PTR anymore.
	* sysdeps/posix/writev.c: Likewise.

	* version.h (VERSION): Bump to 1.98.

	* nss/db-Makefile: Generate lines for getXXXent iteration.

	* sysdeps/alpha/Dist: Don't distribute removed files divlu.S,
	divqu.S, remlu.S, and remqu.S.

Fri Nov 15 08:55:54 1996  Andreas Jaeger  <aj@arthur.pfalz.de>

	* posix/unistd.h: Correct typo in documentation.

Thu Nov 14 18:08:14 1996  a sun  <asun@zoology.washington.edu>

	* inet/netinet/tcp.h: Use __ protected versions instead of
	BYTE_ORDER, LITTLE_ENDIAN, and BIG_ENDIAN directly.

Sat Nov 16 13:44:55 1996  Ulrich Drepper  <drepper@cygnus.com>

	* intl/loadmsgcat.c (_nl_msg_cat_cntr): Initialize so that
	references in libc.so are not anymore undefined.

Sat Nov 16 18:17:36 1996  NIIBE Yutaka  <gniibe@mri.co.jp>

	* io/utime.h: Rename second parameter for utime to prevent warning
	for -Wshadow.
	* dirent/dirent.h: Same here for scandir prototype.
	* math/mathcalls.h: Likewise for frexp and ldexp.
	* sysdeps/unix/sysv/linux/netinet/in.h: Likewise for bindresvport.

Sat Nov 16 03:49:27 1996  Ulrich Drepper  <drepper@cygnus.com>

	* stdlib/tst-strtod.c: Add test for error case below.

Sat Nov 16 03:48:39 1996  Wolfram Gloger  <Wolfram.Gloger@dent.med.uni-muenchen.de>

	* stdlib/strtod.c: Recognize numbers like 0e-19.

Fri Nov 15 08:38:43 1996  Andreas Jaeger  <aj@arthur.pfalz.de>

	* time/Makefile ($(installed-localtime-file)): Fix path to
	rellns-sh.

	* Makefile: Don't generate and install gnu/lib-names.h if
	$(build-shared) is not `yes'.

Thu Nov 14 09:23:58 1996  H.J. Lu (hjl@gnu.ai.mit.edu)

	* sysdeps/posix/Makefile ($(common-objpfx)mk-stdiolim): Depend
	on $(..)posix/posix1_lim.h, not ../posix/posix1_lim.h.

	* Makerules (REAL_MAKE_VERSION): New, use it instead of
	MAKE_VERSION.

Thu Nov 14 22:10:43 1996  Ulrich Drepper  <drepper@cygnus.com>

	* nss/nss_files/files-XXX.x (_nss_files_get,ENTNAME_r): Fix typo.
	* nss/getXXent_r.c: Fix typo.  Set correct return value when
	no further service is available.

Thu Nov 14 17:48:13 1996  Ulrich Drepper  <drepper@cygnus.com>

	* db/recno/rec_put.c: Add cast to avoid warning.
	* db/recno/rec_close.c: Likewise.
	* db/mpool/mpool.c: Likewise.
	* db/hash/hash_bigkey.h: Likewise.
	* db/hash/hash.c: Likewise.
	* db/btree/bt_split.c: Likewise.
	* db/btree/bt_put.c: Likewise.

Thu Nov 14 14:11:44 1996  Ulrich Drepper  <drepper@cygnus.com>

	* dirent/dirent.h: Update copyright.
	* elf/elf.h: Likewise.
	* elf/link.h: Likewise.
	* gmon/sys/gmon_out.h: Likewise.
	* gnu-versions.h: Likewise.
	* intl/libintl.h: Likewise.
	* io/fcntl.h: Likewise.
	* io/ftw.h: Likewise.
	* io/sys/statfs.h: Likewise.
	* io/utime.h: Likewise.
	* locale/langinfo.h: Likewise.
	* malloc/malloc.h: Likewise.
	* malloc/obstack.h: Likewise.
	* misc/ar.h: Likewise.
	* misc/error.h: Likewise.
	* misc/mntent.h: Likewise.
	* misc/sgtty.h: Likewise.
	* misc/sys/cdefs.h: Likewise.
	* misc/sys/dir.h: Likewise.
	* misc/sys/file.h: Likewise.
	* misc/sys/ioctl.h: Likewise.
	* misc/sys/ustat.h: Likewise.
	* posix/fnmatch.h: Likewise.
	* posix/getopt.h: Likewise.
	* posix/glob.h: Likewise.
	* posix/posix2_lim.h: Likewise.
	* posix/regex.h: Likewise.
	* posix/sys/times.h: Likewise.
	* posix/sys/types.h: Likewise.
	* posix/sys/utsname.h: Likewise.
	* posix/tar.h: Likewise.
	* posix/wordexp.h: Likewise.
	* resource/sys/resource.h: Likewise.
	* resource/sys/vlimit.h: Likewise.
	* resource/sys/vtimes.h: Likewise.
	* socket/sys/socket.h: Likewise.
	* socket/sys/un.h: Likewise.
	* stdio-common/printf.h: Likewise.
	* stdlib/alloca.h: Likewise.
	* string/argz.h: Likewise.
	* string/endian.h: Likewise.
	* string/envz.h: Likewise.
	* string/memory.h: Likewise.
	* string/strings.h: Likewise.
	* sysdeps/generic/crypt.h: Likewise.
	* sysdeps/generic/direntry.h: Likewise.
	* sysdeps/generic/gnu/types.h: Likewise.
	* sysdeps/generic/ioctl-types.h: Likewise.
	* sysdeps/generic/netinet/in.h: Likewise.
	* sysdeps/generic/resourcebits.h: Likewise.
	* sysdeps/generic/sigset.h: Likewise.
	* sysdeps/generic/sockaddrcom.h: Likewise.
	* sysdeps/generic/sys/mman.h: Likewise.
	* sysdeps/generic/sys/ptrace.h: Likewise.
	* sysdeps/generic/termbits.h: Likewise.
	* sysdeps/generic/waitstatus.h: Likewise.
	* sysdeps/ieee754/huge_val.h: Likewise.
	* sysdeps/ieee754/nan.h: Likewise.
	* sysdeps/mach/hurd/local_lim.h: Likewise.
	* sysdeps/mach/hurd/statbuf.h: Likewise.
	* sysdeps/stub/huge_val.h: Likewise.
	* sysdeps/stub/libc-lock.h: Likewise.
	* sysdeps/stub/signum.h: Likewise.
	* sysdeps/stub/statbuf.h: Likewise.
	* sysdeps/stub/waitflags.h: Likewise.
	* sysdeps/unix/bsd/bsd4.4/sockaddrcom.h: Likewise.
	* sysdeps/unix/bsd/osf/alpha/statbuf.h: Likewise.
	* sysdeps/unix/bsd/osf/sys/mman.h: Likewise.
	* sysdeps/unix/bsd/signum.h: Likewise.
	* sysdeps/unix/bsd/statbuf.h: Likewise.
	* sysdeps/unix/bsd/sun/signum.h: Likewise.
	* sysdeps/unix/bsd/sun/sunos4/resourcebits.h: Likewise.
	* sysdeps/unix/bsd/sun/sunos4/sys/mman.h: Likewise.
	* sysdeps/unix/bsd/sun/sunos4/termbits.h: Likewise.
	* sysdeps/unix/bsd/ultrix4/sys/mman.h: Likewise.
	* sysdeps/unix/bsd/waitflags.h: Likewise.
	* sysdeps/unix/sysv/irix4/signum.h: Likewise.
	* sysdeps/unix/sysv/irix4/statbuf.h: Likewise.
	* sysdeps/unix/sysv/irix4/sys/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/statbuf.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/sys/io.h: Likewise.
	* sysdeps/unix/sysv/linux/direntry.h: Likewise.
	* sysdeps/unix/sysv/linux/gnu/types.h: Likewise.
	* sysdeps/unix/sysv/linux/ioctl-types.h: Likewise.
	* sysdeps/unix/sysv/linux/local_lim.h: Likewise.
	* sysdeps/unix/sysv/linux/netinet/in.h: Likewise.
	* sysdeps/unix/sysv/linux/resourcebits.h: Likewise.
	* sysdeps/unix/sysv/linux/signum.h: Likewise.
	* sysdeps/unix/sysv/linux/statbuf.h: Likewise.
	* sysdeps/unix/sysv/linux/sys/io.h: Likewise.
	* sysdeps/unix/sysv/linux/sys/klog.h: Likewise.
	* sysdeps/unix/sysv/linux/sys/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/sys/ptrace.h: Likewise.
	* sysdeps/unix/sysv/linux/syscall.h: Likewise.
	* sysdeps/unix/sysv/linux/termbits.h: Likewise.
	* sysdeps/unix/sysv/local_lim.h: Likewise.
	* sysdeps/unix/sysv/sco3.2.4/syscall.h: Likewise.
	* sysdeps/unix/sysv/sco3.2/local_lim.h: Likewise.
	* sysdeps/unix/sysv/signum.h: Likewise.
	* sysdeps/unix/sysv/sysv4/i386/statbuf.h: Likewise.
	* sysdeps/unix/sysv/sysv4/signum.h: Likewise.
	* sysdeps/unix/sysv/sysv4/sigset.h: Likewise.
	* sysdeps/unix/sysv/sysv4/solaris2/signum.h: Likewise.
	* sysdeps/unix/sysv/sysv4/solaris2/statbuf.h: Likewise.
	* sysdeps/unix/sysv/sysv4/waitflags.h: Likewise.
	* sysdeps/vax/huge_val.h: Likewise.
	* values.h: Likewise.

Thu Nov 14 04:22:41 1996  Ulrich Drepper  <drepper@cygnus.com>

	* malloc/obstack.h: Use memcpy instead of bcopy and define a macro
	`memcpy' using bcopy if memcpy is not available.

	* manual/stdio.texi: Correct description of printf customization.
	The argument info function is not optional anymore and the
	interface for `printf_function' also changed.
	* manual/examples/rprintf.c: Define and use argument info function.

	* stdio-common/printf.h (struct printf_info): Change type for field
	`pad' to wchar_t.
	Correct comment for `register_printf_function'.

	* nss/getXXbyYY.c [NEED_H_ERRNO]: Don't pass pointer to h_errno
	to reentrant function.  Instead use temporary variable and set
	h_errno if an error occured.
	Reported by NIIBE Yutaka.

	are no bits set in the masks.  Reported by baldazzi@csr.unibo.it.
1996-11-17 03:15:52 +00:00

98 lines
3.3 KiB
C

/* Relocate a shared object and resolve its references to other loaded objects.
Copyright (C) 1995, 1996 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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <link.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <unistd.h>
#include <errno.h>
#include "dynamic-link.h"
void
_dl_relocate_object (struct link_map *l, struct link_map *scope[], int lazy)
{
if (l->l_relocated)
return;
if (l->l_info[DT_TEXTREL])
{
/* Bletch. We must make read-only segments writable
long enough to relocate them. */
const ElfW(Phdr) *ph;
for (ph = l->l_phdr; ph < &l->l_phdr[l->l_phnum]; ++ph)
if (ph->p_type == PT_LOAD && (ph->p_flags & PF_W) == 0)
{
caddr_t mapstart = ((caddr_t) l->l_addr +
(ph->p_vaddr & ~(_dl_pagesize - 1)));
caddr_t mapend = ((caddr_t) l->l_addr +
((ph->p_vaddr + ph->p_memsz + _dl_pagesize - 1)
& ~(_dl_pagesize - 1)));
if (__mprotect (mapstart, mapend - mapstart,
PROT_READ|PROT_WRITE) < 0)
_dl_signal_error (errno, l->l_name,
"cannot make segment writable for relocation");
}
}
{
/* Do the actual relocation of the object's GOT and other data. */
const char *strtab /* String table object symbols. */
= ((void *) l->l_addr + l->l_info[DT_STRTAB]->d_un.d_ptr);
/* This macro is used as a callback from the ELF_DYNAMIC_RELOCATE code. */
#define RESOLVE(ref, flags) \
(_dl_lookup_symbol (strtab + (*ref)->st_name, ref, scope, \
l->l_name, flags))
#include "dynamic-link.h"
ELF_DYNAMIC_RELOCATE (l, lazy);
}
/* Set up the PLT so its unrelocated entries will jump to
_dl_runtime_resolve (dl-runtime.c), which will relocate them. */
elf_machine_runtime_setup (l, lazy);
/* Mark the object so we know ths work has been done. */
l->l_relocated = 1;
if (l->l_info[DT_TEXTREL])
{
/* Undo the protection change we made before relocating. */
const ElfW(Phdr) *ph;
for (ph = l->l_phdr; ph < &l->l_phdr[l->l_phnum]; ++ph)
if (ph->p_type == PT_LOAD && (ph->p_flags & PF_W) == 0)
{
caddr_t mapstart = ((caddr_t) l->l_addr +
(ph->p_vaddr & ~(_dl_pagesize - 1)));
caddr_t mapend = ((caddr_t) l->l_addr +
((ph->p_vaddr + ph->p_memsz + _dl_pagesize - 1)
& ~(_dl_pagesize - 1)));
int prot = 0;
if (ph->p_flags & PF_R)
prot |= PROT_READ;
if (ph->p_flags & PF_X)
prot |= PROT_EXEC;
if (__mprotect (mapstart, mapend - mapstart, prot) < 0)
_dl_signal_error (errno, l->l_name,
"can't restore segment prot after reloc");
}
}
}