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authorUlrich Drepper <drepper@redhat.com>1997-03-23 01:54:07 +0000
committerUlrich Drepper <drepper@redhat.com>1997-03-23 01:54:07 +0000
commitbc9f6000f6752153e5e1902259d5f491a88a1ae5 (patch)
treeaffff963d9f44f476e13e4ee673f67509456096f /elf
parent5ae9d168f66cc6b40f74cfb4a8f2631fc1df6a2a (diff)
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1997-03-23 02:11 Ulrich Drepper <drepper@cygnus.com> * time/sys/time.h: Make values ITIMER_* also available as macros. * elf/dl-support.c (_dl_sysdep_read_whole_file): Don't call __fstat but instead __fxstat directly to avoid dependency on libc.a when inline failed. * sysdeps/generic/dl-sysdep.c (_dl_sysdep_read_whole_file): Likewise. * math/Makefile (libm-routines): Add s_remquo. * sysdeps/libm-i387/s_remquo.S: New file. * sysdeps/libm-i387/s_remquof.S: New file. * sysdeps/libm-i387/s_remquol.S: New file. * sysdeps/libm-ieee754/s_remquo.c: New file. * sysdeps/libm-ieee754/s_remquof.c: New file. * sysdeps/libm-ieee754/s_remquol.c: New file. * math/libm-test.c (remquo_test): New function. * sysdeps/libm-ieee754/s_rintl.c: Handle implicit leading one correctly. 1997-03-22 14:06 Ulrich Drepper <drepper@cygnus.com> * math/Makefile (libm-calls): Add s_nan. * sysdeps/libm-ieee754/s_nan.c: New file. Implement `nan' function. * sysdeps/libm-ieee754/s_nanf.c: New file. Implement `nanf' function. * sysdeps/libm-ieee754/s_nanl.c: New file. Implement `nanl' function. * math/libm-test.c (basic_tests): Add tests for `nan' function. * math/libm-test.c (copysign_test): New function. (main): Call copysign_test. 1997-03-22 06:28 Ulrich Drepper <drepper@cygnus.com> * sysdeps/libm-ieee754/s_nextafter.c: Return y if x == y. * sysdeps/libm-ieee754/s_nextafterf.c: Likewise. * sysdeps/libm-ieee754/s_nextafterl.c: Likewise. * sysdeps/libm-i387/s_nextafterl.c: Likewise. * math/libm-test.c (fdim_test, fmin_test, fmax_test, nextafter_test): New functions. Test these functions. (main): Call above new functions. 1997-03-22 04:53 Ulrich Drepper <drepper@cygnus.com> * Net release 2.0.2. 1997-03-22 04:37 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/termbits.h (OXTABS): Define as alias for XTABS. * sysdeps/unix/sysv/linux/alpha/termbits.h (OXTABS): Likewise. * termios/sys/ttydefaults.h: Partly revert patch by Andreas Schwab of Sun Dec 15 16:33:44 1996. Proposed by Thomas Bushnell <thomas@gnu.ai.mit.edu>. 1997-03-21 13:41 Roland McGrath <roland@baalperazim.frob.com> * sysdeps/sparc/dl-machine.h (elf_machine_rel): Rewritten as for i386. Check here for non-SHN_UNDEF STB_LOCAL symbols don't do any lookup or consult their values. (elf_machine_lookup_noexec_p, elf_machine_lookup_noplt_p, ELF_MACHINE_RELOC_NOPLT): New macros. * elf/rtld.c (dl_main): Pass ELF_MACHINE_RELOC_NOPLT to _dl_lookup_symbol in place of DL_LOOKUP_NOPLT. * sysdeps/i386/dl-machine.h (ELF_MACHINE_RELOC_NOPLT): New macro. * sysdeps/i386/dl-machine.h (elf_machine_rel): Rewritten to do the symbol lookup before checking reloc type except for R_386_RELATIVE. (elf_machine_lookup_noexec_p, elf_machine_lookup_noplt_p): New macros. * elf/dl-reloc.c (RESOLVE): Remove STB_LOCAL check; let it be per-machine since it supposedly can't happen on i386. * elf/dl-lookup.c (do_lookup): Change arg FLAGS to RELOC_TYPE. Use elf_machine_lookup_{noexec,noplt}_p macros on it. Remove gratuitous indirection from REF arg; change callers. (_dl_lookup_symbol, _dl_lookup_versioned_symbol): Change arg name. (_dl_lookup_symbol_skip, _dl_lookup_versioned_symbol_skip): Remove FLAGS arg altogether. * elf/dlsym.c: Remove argument of FLAGS parameter. * elf/dlvsym.c: Likewise. * elf/link.h: Update decls. * Makefile (distribute): Add BUGS.
Diffstat (limited to 'elf')
-rw-r--r--elf/dl-lookup.c54
-rw-r--r--elf/dl-reloc.c5
-rw-r--r--elf/dl-support.c4
-rw-r--r--elf/dlsym.c3
-rw-r--r--elf/dlvsym.c2
-rw-r--r--elf/link.h21
-rw-r--r--elf/rtld.c2
7 files changed, 40 insertions, 51 deletions
diff --git a/elf/dl-lookup.c b/elf/dl-lookup.c
index 8702a85..f85aa37 100644
--- a/elf/dl-lookup.c
+++ b/elf/dl-lookup.c
@@ -22,7 +22,8 @@
#include <assert.h>
#include <string.h>
-#include <dl-hash.h>
+#include "dl-hash.h"
+#include <dl-machine.h>
#include "../stdio-common/_itoa.h"
#define VERSTAG(tag) (DT_NUM + DT_PROCNUM + DT_VERSIONTAGIDX (tag))
@@ -57,10 +58,10 @@ struct sym_val
something bad happened. */
static inline int
do_lookup (const char *undef_name, unsigned long int hash,
- const ElfW(Sym) **ref, struct sym_val *result,
+ const ElfW(Sym) *ref, struct sym_val *result,
struct link_map *list[], size_t i, size_t n,
const char *reference_name, const struct r_found_version *version,
- struct link_map *skip, int flags)
+ struct link_map *skip, int reloc_type)
{
struct link_map *map;
@@ -78,7 +79,8 @@ do_lookup (const char *undef_name, unsigned long int hash,
continue;
/* Don't search the executable when resolving a copy reloc. */
- if (flags & DL_LOOKUP_NOEXEC && map->l_type == lt_executable)
+ if (elf_machine_lookup_noexec_p (reloc_type) &&
+ map->l_type == lt_executable)
continue;
symtab = ((void *) map->l_addr + map->l_info[DT_SYMTAB]->d_un.d_ptr);
@@ -98,7 +100,7 @@ do_lookup (const char *undef_name, unsigned long int hash,
const ElfW(Sym) *sym = &symtab[symidx];
if (sym->st_value == 0 || /* No value. */
- ((flags & DL_LOOKUP_NOPLT) != 0 /* Reject PLT entry. */
+ (elf_machine_lookup_noplt_p (reloc_type) /* Reject PLT entry. */
&& sym->st_shndx == SHN_UNDEF))
continue;
@@ -113,7 +115,7 @@ do_lookup (const char *undef_name, unsigned long int hash,
continue;
}
- if (sym != *ref && strcmp (strtab + sym->st_name, undef_name))
+ if (sym != ref && strcmp (strtab + sym->st_name, undef_name))
/* Not the symbol we are looking for. */
continue;
@@ -188,16 +190,13 @@ do_lookup (const char *undef_name, unsigned long int hash,
}
/* Search loaded objects' symbol tables for a definition of the symbol
- UNDEF_NAME. FLAGS is a set of flags. If DL_LOOKUP_NOEXEC is set,
- then don't search the executable for a definition; this used for
- copy relocs. If DL_LOOKUP_NOPLT is set, then a PLT entry cannot
- satisfy the reference; some different binding must be found. */
+ UNDEF_NAME. */
ElfW(Addr)
_dl_lookup_symbol (const char *undef_name, const ElfW(Sym) **ref,
struct link_map *symbol_scope[],
const char *reference_name,
- int flags)
+ int reloc_type)
{
const unsigned long int hash = _dl_elf_hash (undef_name);
struct sym_val current_value = { 0, NULL };
@@ -205,9 +204,9 @@ _dl_lookup_symbol (const char *undef_name, const ElfW(Sym) **ref,
/* Search the relevant loaded objects for a definition. */
for (scope = symbol_scope; *scope; ++scope)
- if (do_lookup (undef_name, hash, ref, &current_value,
+ if (do_lookup (undef_name, hash, *ref, &current_value,
(*scope)->l_searchlist, 0, (*scope)->l_nsearchlist,
- reference_name, NULL, NULL, flags))
+ reference_name, NULL, NULL, reloc_type))
break;
if (current_value.s == NULL &&
@@ -230,8 +229,7 @@ ElfW(Addr)
_dl_lookup_symbol_skip (const char *undef_name, const ElfW(Sym) **ref,
struct link_map *symbol_scope[],
const char *reference_name,
- struct link_map *skip_map,
- int flags)
+ struct link_map *skip_map)
{
const unsigned long int hash = _dl_elf_hash (undef_name);
struct sym_val current_value = { 0, NULL };
@@ -243,13 +241,13 @@ _dl_lookup_symbol_skip (const char *undef_name, const ElfW(Sym) **ref,
for (i = 0; (*scope)->l_dupsearchlist[i] != skip_map; ++i)
assert (i < (*scope)->l_ndupsearchlist);
- if (! do_lookup (undef_name, hash, ref, &current_value,
+ if (! do_lookup (undef_name, hash, *ref, &current_value,
(*scope)->l_dupsearchlist, i, (*scope)->l_ndupsearchlist,
- reference_name, NULL, skip_map, flags))
+ reference_name, NULL, skip_map, 0))
while (*++scope)
- if (do_lookup (undef_name, hash, ref, &current_value,
+ if (do_lookup (undef_name, hash, *ref, &current_value,
(*scope)->l_dupsearchlist, 0, (*scope)->l_ndupsearchlist,
- reference_name, NULL, skip_map, flags))
+ reference_name, NULL, skip_map, 0))
break;
*ref = current_value.s;
@@ -266,7 +264,8 @@ ElfW(Addr)
_dl_lookup_versioned_symbol (const char *undef_name, const ElfW(Sym) **ref,
struct link_map *symbol_scope[],
const char *reference_name,
- const struct r_found_version *version, int flags)
+ const struct r_found_version *version,
+ int reloc_type)
{
const unsigned long int hash = _dl_elf_hash (undef_name);
struct sym_val current_value = { 0, NULL };
@@ -275,9 +274,9 @@ _dl_lookup_versioned_symbol (const char *undef_name, const ElfW(Sym) **ref,
/* Search the relevant loaded objects for a definition. */
for (scope = symbol_scope; *scope; ++scope)
{
- int res = do_lookup (undef_name, hash, ref, &current_value,
+ int res = do_lookup (undef_name, hash, *ref, &current_value,
(*scope)->l_searchlist, 0, (*scope)->l_nsearchlist,
- reference_name, version, NULL, flags);
+ reference_name, version, NULL, reloc_type);
if (res > 0)
break;
@@ -312,8 +311,7 @@ _dl_lookup_versioned_symbol_skip (const char *undef_name,
struct link_map *symbol_scope[],
const char *reference_name,
const struct r_found_version *version,
- struct link_map *skip_map,
- int flags)
+ struct link_map *skip_map)
{
const unsigned long int hash = _dl_elf_hash (undef_name);
struct sym_val current_value = { 0, NULL };
@@ -325,13 +323,13 @@ _dl_lookup_versioned_symbol_skip (const char *undef_name,
for (i = 0; (*scope)->l_dupsearchlist[i] != skip_map; ++i)
assert (i < (*scope)->l_ndupsearchlist);
- if (! do_lookup (undef_name, hash, ref, &current_value,
+ if (! do_lookup (undef_name, hash, *ref, &current_value,
(*scope)->l_dupsearchlist, i, (*scope)->l_ndupsearchlist,
- reference_name, version, skip_map, flags))
+ reference_name, version, skip_map, 0))
while (*++scope)
- if (do_lookup (undef_name, hash, ref, &current_value,
+ if (do_lookup (undef_name, hash, *ref, &current_value,
(*scope)->l_dupsearchlist, 0, (*scope)->l_ndupsearchlist,
- reference_name, version, skip_map, flags))
+ reference_name, version, skip_map, 0))
break;
*ref = current_value.s;
diff --git a/elf/dl-reloc.c b/elf/dl-reloc.c
index d2122a8..f1c43ea 100644
--- a/elf/dl-reloc.c
+++ b/elf/dl-reloc.c
@@ -58,10 +58,7 @@ _dl_relocate_object (struct link_map *l, struct link_map *scope[], int lazy)
/* This macro is used as a callback from the ELF_DYNAMIC_RELOCATE code. */
#define RESOLVE(ref, version, flags) \
- ((*ref)->st_shndx != SHN_UNDEF && \
- ELFW(ST_BIND) ((*ref)->st_info) == STB_LOCAL \
- ? l->l_addr : \
- (version) != NULL && (version)->hash != 0 \
+ ((version) != NULL && (version)->hash != 0 \
? _dl_lookup_versioned_symbol (strtab + (*ref)->st_name, (ref), scope, \
l->l_name, (version), (flags)) \
: _dl_lookup_symbol (strtab + (*ref)->st_name, (ref), scope, \
diff --git a/elf/dl-support.c b/elf/dl-support.c
index 593f967..5c70b4f 100644
--- a/elf/dl-support.c
+++ b/elf/dl-support.c
@@ -1,5 +1,5 @@
/* Support for dynamic linking code in static libc.
- Copyright (C) 1996 Free Software Foundation, Inc.
+ Copyright (C) 1996, 1997 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
@@ -62,7 +62,7 @@ _dl_sysdep_read_whole_file (const char *file, size_t *sizep, int prot)
int fd = __open (file, O_RDONLY);
if (fd < 0)
return NULL;
- if (__fstat (fd, &st) < 0)
+ if (__fxstat (_STAT_VER, fd, &st) < 0)
result = NULL;
else
{
diff --git a/elf/dlsym.c b/elf/dlsym.c
index 73f6e86..d05619b 100644
--- a/elf/dlsym.c
+++ b/elf/dlsym.c
@@ -53,8 +53,7 @@ RTLD_NEXT used in code not dynamically loaded"));
while (l->l_loader)
l = l->l_loader;
- loadbase = _dl_lookup_symbol_skip
- (name, &ref, &_dl_loaded, NULL, l, 0);
+ loadbase = _dl_lookup_symbol_skip (name, &ref, &_dl_loaded, NULL, l);
}
else
{
diff --git a/elf/dlvsym.c b/elf/dlvsym.c
index 922a6ee..b3d4c1a 100644
--- a/elf/dlvsym.c
+++ b/elf/dlvsym.c
@@ -57,7 +57,7 @@ RTLD_NEXT used in code not dynamically loaded"));
l = l->l_loader;
loadbase = _dl_lookup_versioned_symbol_skip
- (name, &ref, &_dl_loaded, NULL, &version, l, 0);
+ (name, &ref, &_dl_loaded, NULL, &version, l);
}
else
{
diff --git a/elf/link.h b/elf/link.h
index 62bf74c..3934aed 100644
--- a/elf/link.h
+++ b/elf/link.h
@@ -290,18 +290,15 @@ extern void _dl_close (struct link_map *map);
null-terminated list of object scopes to search; each object's
l_searchlist (i.e. the segment of the dependency tree starting at that
object) is searched in turn. REFERENCE_NAME should name the object
- containing the reference; it is used in error messages. FLAGS is a
- set of flags: */
-#define DL_LOOKUP_NOEXEC 1 /* Don't search the executable for a
- definition; this is used for copy
- relocs. */
-#define DL_LOOKUP_NOPLT 2 /* The reference must not be resolved
- to a PLT entry. */
+ containing the reference; it is used in error messages.
+ RELOC_TYPE is a machine-dependent reloc type, which is passed to
+ the `elf_machine_lookup_*_p' macros in dl-machine.h to affect which
+ symbols can be chosen. */
extern ElfW(Addr) _dl_lookup_symbol (const char *undef,
const ElfW(Sym) **sym,
struct link_map *symbol_scope[],
const char *reference_name,
- int flags);
+ int reloc_type);
/* Lookup versioned symbol. */
extern ElfW(Addr) _dl_lookup_versioned_symbol (const char *undef,
@@ -309,15 +306,14 @@ extern ElfW(Addr) _dl_lookup_versioned_symbol (const char *undef,
struct link_map *symbol_scope[],
const char *reference_name,
const struct r_found_version *version,
- int flags);
+ int reloc_type);
/* For handling RTLD_NEXT we must be able to skip shared objects. */
extern ElfW(Addr) _dl_lookup_symbol_skip (const char *undef,
const ElfW(Sym) **sym,
struct link_map *symbol_scope[],
const char *reference_name,
- struct link_map *skip_this,
- int flags);
+ struct link_map *skip_this);
/* For handling RTLD_NEXT with versioned symbols we must be able to
skip shared objects. */
@@ -326,8 +322,7 @@ extern ElfW(Addr) _dl_lookup_versioned_symbol_skip (const char *undef,
struct link_map *symbol_scope[],
const char *reference_name,
const struct r_found_version *version,
- struct link_map *skip_this,
- int flags);
+ struct link_map *skip_this);
/* Look up symbol NAME in MAP's scope and return its run-time address. */
extern ElfW(Addr) _dl_symbol_value (struct link_map *map, const char *name);
diff --git a/elf/rtld.c b/elf/rtld.c
index 84ab379..295a6ae 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -518,7 +518,7 @@ of this helper program; chances are you did not intend to run this program.\n",
ElfW(Addr) loadbase = _dl_lookup_symbol (_dl_argv[i], &ref,
&_dl_default_scope[2],
"argument",
- DL_LOOKUP_NOPLT);
+ ELF_MACHINE_RELOC_NOPLT);
char buf[20], *bp;
buf[sizeof buf - 1] = '\0';
bp = _itoa (ref->st_value, &buf[sizeof buf - 1], 16, 0);