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Sat Jan 6 16:39:14 1996 Roland McGrath <roland@churchy.gnu.ai.mit.edu>

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* Makefile (subdirs): Added db.

	* resolv/Makefile (routines): Add res_data.
	* resolv/res_data.c, resolv/res_debug.c, resolv/resolv.h:
	Updated from BIND 4.9.3 final release.

	* elf/dynamic-link.h (elf_get_dynamic_info): Handle
	processor-specific tags.
	(ELF_DYNAMIC_DO_REL, ELF_DYNAMIC_DO_RELA): Handle absent DT_PLTREL tag.

	* elf/elf.h (DT_MIPS_NUM, DT_PROCNUM): New macros.
	* elf/link.h (struct link_map): Extend `l_info' by DT_PROCNUM.

	* sysdeps/i386/dl-machine.h (elf_machine_runtime_setup): Take new
	arg LAZY.  Only do our work if LAZY and there is a DT_JMPREL record.
	* elf/dl-reloc.c (_dl_relocate_object): Call
	elf_machine_runtime_setup unconditionally, and pass it LAZY flag.

	* elf/dl-load.c: Fixed ELFMAG check to work for either byte order.
	Align end of load segment only to page size, not to segment alignment.
This commit is contained in:
Roland McGrath 1996-01-07 10:00:21 +00:00
parent c4b7291877
commit a2e1b046f6
11 changed files with 191 additions and 73 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
ChangeLog
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@ -1,3 +1,26 @@
Sat Jan 6 16:39:14 1996 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* Makefile (subdirs): Added db.
* resolv/Makefile (routines): Add res_data.
* resolv/res_data.c, resolv/res_debug.c, resolv/resolv.h:
Updated from BIND 4.9.3 final release.
* elf/dynamic-link.h (elf_get_dynamic_info): Handle
processor-specific tags.
(ELF_DYNAMIC_DO_REL, ELF_DYNAMIC_DO_RELA): Handle absent DT_PLTREL tag.
* elf/elf.h (DT_MIPS_NUM, DT_PROCNUM): New macros.
* elf/link.h (struct link_map): Extend `l_info' by DT_PROCNUM.
* sysdeps/i386/dl-machine.h (elf_machine_runtime_setup): Take new
arg LAZY. Only do our work if LAZY and there is a DT_JMPREL record.
* elf/dl-reloc.c (_dl_relocate_object): Call
elf_machine_runtime_setup unconditionally, and pass it LAZY flag.
* elf/dl-load.c: Fixed ELFMAG check to work for either byte order.
Align end of load segment only to page size, not to segment alignment.
Thu Jan 4 11:35:18 1996 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* sysdeps/mach/hurd/setitimer.c: Code rearranged a bit to use new

4
Makefile
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@ -1,4 +1,4 @@
# Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
# Copyright (C) 1991, 92, 93, 94, 95, 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
@ -51,7 +51,7 @@ sysdep-subdirs := $(subst $(\n), ,$(sysdep-subdirs))
endif
# These are the subdirectories containing the library source.
subdirs = csu assert ctype locale intl math setjmp signal stdlib \
subdirs = csu assert ctype db locale intl math setjmp signal stdlib \
stdio-common $(stdio) malloc string time dirent grp pwd \
posix io termios resource misc socket sysvipc gmon gnulib \
$(wildcard crypt) manual $(sysdep-subdirs) elf

9
elf/dl-reloc.c
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@ -1,5 +1,5 @@
/* Relocate a shared object and resolve its references to other loaded objects.
Copyright (C) 1995 Free Software Foundation, Inc.
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
@ -93,10 +93,9 @@ _dl_relocate_object (struct link_map *l, int lazy)
l->l_prev->l_next = l;
}
if (l->l_info[DT_JMPREL] && lazy)
/* Set up the PLT so its unrelocated entries will
jump to _dl_runtime_resolve, which will relocate them. */
elf_machine_runtime_setup (l);
/* Set up the PLT so its unrelocated entries will
jump to _dl_runtime_resolve, which will relocate them. */
elf_machine_runtime_setup (l, lazy);
l->l_relocated = 1;

20
elf/dynamic-link.h
View File

@ -25,11 +25,11 @@ Cambridge, MA 02139, USA. */
/* Read the dynamic section at DYN and fill in INFO with indices DT_*. */
static inline void
elf_get_dynamic_info (Elf32_Dyn *dyn, Elf32_Dyn *info[DT_NUM])
elf_get_dynamic_info (Elf32_Dyn *dyn, Elf32_Dyn *info[DT_NUM + DT_PROCNUM])
{
unsigned int i;
for (i = 0; i < DT_NUM; ++i)
for (i = 0; i < DT_NUM + DT_PROCNUM; ++i)
info[i] = NULL;
if (! dyn)
@ -37,8 +37,14 @@ elf_get_dynamic_info (Elf32_Dyn *dyn, Elf32_Dyn *info[DT_NUM])
while (dyn->d_tag != DT_NULL)
{
assert (dyn->d_tag < DT_NUM);
info[dyn->d_tag] = dyn++;
if (dyn->d_tag < DT_NUM)
info[dyn->d_tag] = dyn;
else if (dyn->d_tag >= DT_LOPROC &&
dyn->d_tag < DT_LOPROC + DT_PROCNUM)
info[dyn->d_tag - DT_LOPROC + DT_NUM] = dyn;
else
assert (! "bad dynamic tag");
dyn++;
}
if (info[DT_RELA])
@ -60,7 +66,8 @@ elf_get_dynamic_info (Elf32_Dyn *dyn, Elf32_Dyn *info[DT_NUM])
#define ELF_DYNAMIC_DO_REL(map, lazy, resolve) \
if ((map)->l_info[DT_REL]) \
elf_dynamic_do_rel ((map), DT_REL, DT_RELSZ, (resolve), 0); \
if ((map)->l_info[DT_PLTREL]->d_un.d_val == DT_REL) \
if ((map)->l_info[DT_PLTREL] && \
(map)->l_info[DT_PLTREL]->d_un.d_val == DT_REL) \
elf_dynamic_do_rel ((map), DT_JMPREL, DT_PLTRELSZ, (resolve), (lazy));
#else
#define ELF_DYNAMIC_DO_RELA(map, lazy, resolve) /* Nothing to do. */
@ -72,7 +79,8 @@ elf_get_dynamic_info (Elf32_Dyn *dyn, Elf32_Dyn *info[DT_NUM])
#define ELF_DYNAMIC_DO_RELA(map, lazy, resolve) \
if ((map)->l_info[DT_RELA]) \
elf_dynamic_do_rela ((map), DT_RELA, DT_RELASZ, (resolve), 0); \
if ((map)->l_info[DT_PLTREL]->d_un.d_val == DT_RELA) \
if ((map)->l_info[DT_PLTREL] && \
(map)->l_info[DT_PLTREL]->d_un.d_val == DT_RELA) \
elf_dynamic_do_rela ((map), DT_JMPREL, DT_PLTRELSZ, (resolve), (lazy));
#else
#define ELF_DYNAMIC_DO_RELA(map, lazy, resolve) /* Nothing to do. */

6
elf/elf.h
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@ -1,5 +1,5 @@
/* This file defines standard ELF types, structures, and macros.
Copyright (C) 1995 Free Software Foundation, Inc.
Copyright (C) 1995, 1996 Free Software Foundation, Inc.
Contributed by Ian Lance Taylor (ian@cygnus.com).
This file is part of the GNU C Library.
@ -326,9 +326,10 @@ typedef struct
#define DT_DEBUG 21 /* For debugging; unspecified */
#define DT_TEXTREL 22 /* Reloc might modify .text */
#define DT_JMPREL 23 /* Address of PLT relocs */
#define DT_NUM 24 /* Number used. */
#define DT_NUM 24 /* Number used */
#define DT_LOPROC 0x70000000 /* Start of processor-specific */
#define DT_HIPROC 0x7fffffff /* End of processor-specific */
#define DT_PROCNUM DT_MIPS_NUM /* Most used by any processor */
/* Standard 64 bit ELF types. */
@ -573,6 +574,7 @@ typedef struct
#define DT_MIPS_UNREFEXTNO 0x70000012 /* First external DYNSYM */
#define DT_MIPS_GOTSYM 0x70000013 /* First GOT entry in DYNSYM */
#define DT_MIPS_HIPAGENO 0x70000014 /* Number of GOT page table entries */
#define DT_MIPS_NUM 0x15
/* Legal values for DT_MIPS_FLAG Elf32_Dyn entry. */

9
elf/link.h
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@ -1,5 +1,5 @@
/* Run-time dynamic linker data structures for loaded ELF shared objects.
Copyright (C) 1995 Free Software Foundation, Inc.
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
@ -82,7 +82,10 @@ struct link_map
They may change without notice. */
const char *l_libname; /* Name requested (before search). */
Elf32_Dyn *l_info[DT_NUM]; /* Indexed pointers to dynamic section. */
/* Indexed pointers to dynamic section.
[0,DT_NUM) are indexed by the processor-independent tags.
[DT_NUM,DT_NUM+DT_PROCNUM] are indexed by the tag minus DT_LOPROC. */
Elf32_Dyn *l_info[DT_NUM + DT_PROCNUM];
const Elf32_Phdr *l_phdr; /* Pointer to program header table in core. */
Elf32_Word l_phnum; /* Number of program header entries. */
Elf32_Addr l_entry; /* Entry point location. */
@ -141,7 +144,7 @@ extern int _dl_secure;
zero; OBJECT is the name of the problematical shared object, or null if
it is a general problem; ERRSTRING is a string describing the specific
problem. */
extern void _dl_signal_error (int errcode,
const char *object,
const char *errstring)

4
resolv/Makefile
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@ -1,4 +1,4 @@
# Copyright (C) 1994, 1995 Free Software Foundation, Inc.
# Copyright (C) 1994, 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
@ -25,7 +25,7 @@ headers := resolv.h netdb.h arpa/nameser.h sys/bitypes.h
distribute := ../conf/portability.h
routines := gethnamaddr getnetbyaddr getnetbyname getnetent getnetnamadr \
herror nsap_addr res_comp res_debug res_init res_mkquery \
herror nsap_addr res_comp res_debug res_data res_init res_mkquery \
res_query res_send sethostent inet_addr
include ../Rules

114
resolv/res_data.c Normal file
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@ -0,0 +1,114 @@
/*
* ++Copyright++ 1995
* -
* Copyright (c) 1995
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* -
* Portions Copyright (c) 1993 by Digital Equipment Corporation.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies, and that
* the name of Digital Equipment Corporation not be used in advertising or
* publicity pertaining to distribution of the document or software without
* specific, written prior permission.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
* -
* --Copyright--
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char rcsid[] = "$Id$";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <stdio.h>
#include <ctype.h>
#include <resolv.h>
#if defined(BSD) && (BSD >= 199103)
# include <unistd.h>
# include <stdlib.h>
# include <string.h>
#else
# include "../conf/portability.h"
#endif
const char *_res_opcodes[] = {
"QUERY",
"IQUERY",
"CQUERYM",
"CQUERYU", /* experimental */
"NOTIFY", /* experimental */
"5",
"6",
"7",
"8",
"UPDATEA",
"UPDATED",
"UPDATEDA",
"UPDATEM",
"UPDATEMA",
"ZONEINIT",
"ZONEREF",
};
const char *_res_resultcodes[] = {
"NOERROR",
"FORMERR",
"SERVFAIL",
"NXDOMAIN",
"NOTIMP",
"REFUSED",
"6",
"7",
"8",
"9",
"10",
"11",
"12",
"13",
"14",
"NOCHANGE",
};

47
resolv/res_debug.c
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@ -76,43 +76,8 @@ static char rcsid[] = "$Id$";
# include "../conf/options.h"
#endif
const char *_res_opcodes[] = {
"QUERY",
"IQUERY",
"CQUERYM",
"CQUERYU", /* experimental */
"NOTIFY", /* experimental */
"5",
"6",
"7",
"8",
"UPDATEA",
"UPDATED",
"UPDATEDA",
"UPDATEM",
"UPDATEMA",
"ZONEINIT",
"ZONEREF",
};
const char *_res_resultcodes[] = {
"NOERROR",
"FORMERR",
"SERVFAIL",
"NXDOMAIN",
"NOTIMP",
"REFUSED",
"6",
"7",
"8",
"9",
"10",
"11",
"12",
"13",
"14",
"NOCHANGE",
};
extern const char *_res_opcodes[];
extern const char *_res_resultcodes[];
/* XXX: we should use getservbyport() instead. */
static const char *
@ -310,7 +275,7 @@ __fp_nquery(msg, len, file)
putc('\n', file);
}
if ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEADX))
putc(';', file);
putc(';', file);
if ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEAD2)) {
fprintf(file, "; flags:");
if (hp->qr)
@ -342,10 +307,10 @@ __fp_nquery(msg, len, file)
fprintf(file, ";; QUESTIONS:\n");
while (--n >= 0) {
if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES))
fprintf(file, ";;\t");
fprintf(file, ";;\t");
TruncTest(cp);
if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES))
cp = p_cdnname(cp, msg, len, file);
cp = p_cdnname(cp, msg, len, file);
else {
int n;
char name[MAXDNAME];
@ -368,7 +333,7 @@ __fp_nquery(msg, len, file)
__p_class(_getshort((u_char*)cp)));
cp += INT16SZ;
if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES))
putc('\n', file);
putc('\n', file);
}
}
/*

3
resolv/resolv.h
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@ -78,7 +78,7 @@
* is new enough to contain a certain feature.
*/
#define __RES 19950621
#define __RES 19951031
/*
* Resolver configuration file.
@ -121,6 +121,7 @@ struct __res_state {
struct in_addr addr;
u_int32_t mask;
} sort_list[MAXRESOLVSORT];
char pad[72]; /* On an i38this means 512b total. */
};
/*

25
sysdeps/i386/dl-machine.h
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@ -1,5 +1,5 @@
/* Machine-dependent ELF dynamic relocation inline functions. i386 version.
Copyright (C) 1995 Free Software Foundation, Inc.
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
@ -140,20 +140,23 @@ elf_machine_lazy_rel (struct link_map *map, const Elf32_Rel *reloc)
entries will jump to the on-demand fixup code in dl-runtime.c. */
static inline void
elf_machine_runtime_setup (struct link_map *l)
elf_machine_runtime_setup (struct link_map *l, int lazy)
{
Elf32_Addr *got;
extern void _dl_runtime_resolve (Elf32_Word);
/* The GOT entries for functions in the PLT have not yet been filled
in. Their initial contents will arrange when called to push an
offset into the .rel.plt section, push _GLOBAL_OFFSET_TABLE_[1],
and then jump to _GLOBAL_OFFSET_TABLE[2]. */
got = (Elf32_Addr *) (l->l_addr + l->l_info[DT_PLTGOT]->d_un.d_ptr);
got[1] = (Elf32_Addr) l; /* Identify this shared object. */
/* This function will get called to fix up the GOT entry indicated by
the offset on the stack, and then jump to the resolved address. */
got[2] = (Elf32_Addr) &_dl_runtime_resolve;
if (l->l_info[DT_JMPREL] && lazy)
{
/* The GOT entries for functions in the PLT have not yet been filled
in. Their initial contents will arrange when called to push an
offset into the .rel.plt section, push _GLOBAL_OFFSET_TABLE_[1],
and then jump to _GLOBAL_OFFSET_TABLE[2]. */
got = (Elf32_Addr *) (l->l_addr + l->l_info[DT_PLTGOT]->d_un.d_ptr);
got[1] = (Elf32_Addr) l; /* Identify this shared object. */
/* This function will get called to fix up the GOT entry indicated by
the offset on the stack, and then jump to the resolved address. */
got[2] = (Elf32_Addr) &_dl_runtime_resolve;
}
}