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2000-05-21  H.J. Lu  <hjl@gnu.org>

	* elf/do-lookup.h (do_lookup_versioned): Replace reloc_type parameter
	with noexec and noplt parameter.
	(do_lookup): Likewise.

	* elf/dl-lookup.c (_dl_lookup_symbol): Change for new parameters of
	do_lookup.  Support STV_PROTECTED.
	(_dl_lookup_symbol_skip): Likewise.
	(_dl_lookup_versioned_symbol): Likewise.
	(_dl_lookup_versioned_symbol_skip): Likewise.

	* elf/dl-reloc.c (RESOLVE): Check STB_LOCAL instead of ST_VISIBILITY.

	* elf/dl-runtime.c (profile_fixup): Fix a typo in comment.
This commit is contained in:
Ulrich Drepper 2000-05-22 16:33:19 +00:00
parent 07d3c1bfc2
commit 6aa29abe9f
4 changed files with 158 additions and 23 deletions
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16
ChangeLog
View File

@ -1,3 +1,19 @@
2000-05-21 H.J. Lu <hjl@gnu.org>
* elf/do-lookup.h (do_lookup_versioned): Replace reloc_type parameter
with noexec and noplt parameter.
(do_lookup): Likewise.
* elf/dl-lookup.c (_dl_lookup_symbol): Change for new parameters of
do_lookup. Support STV_PROTECTED.
(_dl_lookup_symbol_skip): Likewise.
(_dl_lookup_versioned_symbol): Likewise.
(_dl_lookup_versioned_symbol_skip): Likewise.
* elf/dl-reloc.c (RESOLVE): Check STB_LOCAL instead of ST_VISIBILITY.
* elf/dl-runtime.c (profile_fixup): Fix a typo in comment.
2000-05-21 Jakub Jelinek <jakub@redhat.com>
* sysdeps/arm/bits/huge_val.h: Prereq gcc 2.96+, not 2.95.

145
elf/dl-lookup.c
View File

@ -75,9 +75,11 @@ __libc_lock_define (extern, _dl_load_lock)
without versioning. gcc is not able to optimize a single function
definition serving for both purposes so we define two functions. */
#define VERSIONED 0
#define PROTECTED 0
#include "do-lookup.h"
#define VERSIONED 1
#define PROTECTED 0
#include "do-lookup.h"
@ -194,13 +196,16 @@ _dl_lookup_symbol (const char *undef_name, struct link_map *undef_map,
const unsigned long int hash = _dl_elf_hash (undef_name);
struct sym_val current_value = { NULL, NULL };
struct r_scope_elem **scope;
int protected;
int noexec = elf_machine_lookup_noexec_p (reloc_type);
int noplt = elf_machine_lookup_noplt_p (reloc_type);
++_dl_num_relocations;
/* Search the relevant loaded objects for a definition. */
for (scope = symbol_scope; *scope; ++scope)
if (do_lookup (undef_name, undef_map, hash, *ref, &current_value,
*scope, 0, NULL, reloc_type))
*scope, 0, NULL, noexec, noplt))
{
/* We have to check whether this would bind UNDEF_MAP to an object
in the global scope which was dynamically loaded. In this case
@ -232,6 +237,8 @@ _dl_lookup_symbol (const char *undef_name, struct link_map *undef_map,
return 0;
}
protected = *ref && ELFW(ST_VISIBILITY) ((*ref)->st_other) == STV_PROTECTED;
if (__builtin_expect (_dl_debug_bindings, 0))
_dl_debug_message (1, "binding file ",
(reference_name && reference_name[0]
@ -239,10 +246,33 @@ _dl_lookup_symbol (const char *undef_name, struct link_map *undef_map,
: (_dl_argv[0] ?: "<main program>")),
" to ", current_value.m->l_name[0]
? current_value.m->l_name : _dl_argv[0],
": symbol `", undef_name, "'\n", NULL);
": ", protected ? "protected" : "normal",
" symbol `", undef_name, "'\n", NULL);
if (__builtin_expect (protected == 0, 1))
{
*ref = current_value.s;
return LOOKUP_VALUE (current_value.m);
}
else
{
/* It is very tricky. We need to figure out what value to
return for the protected symbol */
struct sym_val protected_value = { NULL, NULL };
for (scope = symbol_scope; *scope; ++scope)
if (do_lookup (undef_name, undef_map, hash, *ref,
&protected_value, *scope, 0, NULL, 0, 1))
break;
if (protected_value.s == NULL || protected_value.m == undef_map)
{
*ref = current_value.s;
return LOOKUP_VALUE (current_value.m);
}
return LOOKUP_VALUE (undef_map);
}
}
@ -263,6 +293,7 @@ _dl_lookup_symbol_skip (const char *undef_name,
struct sym_val current_value = { NULL, NULL };
struct r_scope_elem **scope;
size_t i;
int protected;
++_dl_num_relocations;
@ -273,7 +304,7 @@ _dl_lookup_symbol_skip (const char *undef_name,
if (i < (*scope)->r_nlist
&& do_lookup (undef_name, undef_map, hash, *ref, &current_value,
*scope, i, skip_map, 0))
*scope, i, skip_map, 0, 0))
{
/* We have to check whether this would bind UNDEF_MAP to an object
in the global scope which was dynamically loaded. In this case
@ -293,7 +324,7 @@ _dl_lookup_symbol_skip (const char *undef_name,
else
while (*++scope)
if (do_lookup (undef_name, undef_map, hash, *ref, &current_value,
*scope, 0, skip_map, 0))
*scope, 0, skip_map, 0, 0))
{
/* We have to check whether this would bind UNDEF_MAP to an object
in the global scope which was dynamically loaded. In this case
@ -319,6 +350,8 @@ _dl_lookup_symbol_skip (const char *undef_name,
return 0;
}
protected = *ref && ELFW(ST_VISIBILITY) ((*ref)->st_other) == STV_PROTECTED;
if (__builtin_expect (_dl_debug_bindings, 0))
_dl_debug_message (1, "binding file ",
(reference_name && reference_name[0]
@ -326,10 +359,36 @@ _dl_lookup_symbol_skip (const char *undef_name,
: (_dl_argv[0] ?: "<main program>")),
" to ", current_value.m->l_name[0]
? current_value.m->l_name : _dl_argv[0],
": symbol `", undef_name, "' (skip)\n", NULL);
": ", protected ? "protected" : "normal",
" symbol `", undef_name, "'\n", NULL);
if (__builtin_expect (protected == 0, 1))
{
*ref = current_value.s;
return LOOKUP_VALUE (current_value.m);
}
else
{
/* It is very tricky. We need to figure out what value to
return for the protected symbol */
struct sym_val protected_value = { NULL, NULL };
if (i >= (*scope)->r_nlist
|| !do_lookup (undef_name, undef_map, hash, *ref, &protected_value,
*scope, i, skip_map, 0, 1))
while (*++scope)
if (do_lookup (undef_name, undef_map, hash, *ref, &protected_value,
*scope, 0, skip_map, 0, 1))
break;
if (protected_value.s == NULL || protected_value.m == undef_map)
{
*ref = current_value.s;
return LOOKUP_VALUE (current_value.m);
}
return LOOKUP_VALUE (undef_map);
}
}
@ -350,6 +409,9 @@ _dl_lookup_versioned_symbol (const char *undef_name,
const unsigned long int hash = _dl_elf_hash (undef_name);
struct sym_val current_value = { NULL, NULL };
struct r_scope_elem **scope;
int protected;
int noexec = elf_machine_lookup_noexec_p (reloc_type);
int noplt = elf_machine_lookup_noplt_p (reloc_type);
++_dl_num_relocations;
@ -358,7 +420,7 @@ _dl_lookup_versioned_symbol (const char *undef_name,
{
int res = do_lookup_versioned (undef_name, undef_map, hash, *ref,
&current_value, *scope, 0, version, NULL,
reloc_type);
noexec, noplt);
if (res > 0)
{
/* We have to check whether this would bind UNDEF_MAP to an object
@ -412,6 +474,8 @@ _dl_lookup_versioned_symbol (const char *undef_name,
return 0;
}
protected = *ref && ELFW(ST_VISIBILITY) ((*ref)->st_other) == STV_PROTECTED;
if (__builtin_expect (_dl_debug_bindings, 0))
_dl_debug_message (1, "binding file ",
(reference_name && reference_name[0]
@ -419,11 +483,35 @@ _dl_lookup_versioned_symbol (const char *undef_name,
: (_dl_argv[0] ?: "<main program>")),
" to ", current_value.m->l_name[0]
? current_value.m->l_name : _dl_argv[0],
": symbol `", undef_name, "' [", version->name,
": ", protected ? "protected" : "normal",
" symbol `", undef_name, "' [", version->name,
"]\n", NULL);
if (__builtin_expect (protected == 0, 1))
{
*ref = current_value.s;
return LOOKUP_VALUE (current_value.m);
}
else
{
/* It is very tricky. We need to figure out what value to
return for the protected symbol */
struct sym_val protected_value = { NULL, NULL };
for (scope = symbol_scope; *scope; ++scope)
if (do_lookup_versioned (undef_name, undef_map, hash, *ref,
&protected_value, *scope, 0, version, NULL,
0, 1))
break;
if (protected_value.s == NULL || protected_value.m == undef_map)
{
*ref = current_value.s;
return LOOKUP_VALUE (current_value.m);
}
return LOOKUP_VALUE (undef_map);
}
}
@ -443,6 +531,7 @@ _dl_lookup_versioned_symbol_skip (const char *undef_name,
struct sym_val current_value = { NULL, NULL };
struct r_scope_elem **scope;
size_t i;
int protected;
++_dl_num_relocations;
@ -453,7 +542,8 @@ _dl_lookup_versioned_symbol_skip (const char *undef_name,
if (i < (*scope)->r_nlist
&& do_lookup_versioned (undef_name, undef_map, hash, *ref,
&current_value, *scope, i, version, skip_map, 0))
&current_value, *scope, i, version, skip_map,
0, 0))
{
/* We have to check whether this would bind UNDEF_MAP to an object
in the global scope which was dynamically loaded. In this case
@ -475,7 +565,7 @@ _dl_lookup_versioned_symbol_skip (const char *undef_name,
while (*++scope)
if (do_lookup_versioned (undef_name, undef_map, hash, *ref,
&current_value, *scope, 0, version, skip_map,
0))
0, 0))
{
/* We have to check whether this would bind UNDEF_MAP to an object
in the global scope which was dynamically loaded. In this case
@ -512,19 +602,48 @@ _dl_lookup_versioned_symbol_skip (const char *undef_name,
return 0;
}
protected = *ref && ELFW(ST_VISIBILITY) ((*ref)->st_other) == STV_PROTECTED;
if (__builtin_expect (_dl_debug_bindings, 0))
_dl_debug_message (1, "binding file ",
(reference_name && reference_name[0]
? reference_name
: (_dl_argv[0] ?: "<main program>")),
" to ",
current_value.m->l_name[0]
" to ", current_value.m->l_name[0]
? current_value.m->l_name : _dl_argv[0],
": symbol `", undef_name, "' [", version->name,
"] (skip)\n", NULL);
": ", protected ? "protected" : "normal",
" symbol `", undef_name, "' [", version->name,
"]\n", NULL);
if (__builtin_expect (protected == 0, 1))
{
*ref = current_value.s;
return LOOKUP_VALUE (current_value.m);
}
else
{
/* It is very tricky. We need to figure out what value to
return for the protected symbol */
struct sym_val protected_value = { NULL, NULL };
if (i >= (*scope)->r_nlist
|| !do_lookup_versioned (undef_name, undef_map, hash, *ref,
&protected_value, *scope, i, version,
skip_map, 0, 1))
while (*++scope)
if (do_lookup_versioned (undef_name, undef_map, hash, *ref,
&protected_value, *scope, 0, version,
skip_map, 0, 1))
break;
if (protected_value.s == NULL || protected_value.m == undef_map)
{
*ref = current_value.s;
return LOOKUP_VALUE (current_value.m);
}
return LOOKUP_VALUE (undef_map);
}
}

2
elf/dl-reloc.c
View File

@ -79,7 +79,7 @@ _dl_relocate_object (struct link_map *l, struct r_scope_elem *scope[],
(flags))) \
: l)
#define RESOLVE(ref, version, flags) \
(__builtin_expect (ELFW(ST_VISIBILITY) ((*ref)->st_other), 0) == 0 \
(ELFW(ST_BIND) ((*ref)->st_info) != STB_LOCAL \
? ((version) != NULL && (version)->hash != 0 \
? _dl_lookup_versioned_symbol (strtab + (*ref)->st_name, l, (ref), \
scope, (version), (flags)) \

2
elf/dl-runtime.c
View File

@ -158,7 +158,7 @@ profile_fixup (
/* Sanity check that we're really looking at a PLT relocation. */
assert (ELFW(R_TYPE)(reloc->r_info) == ELF_MACHINE_JMP_SLOT);
/* Look up the target symbol. If the symbol is marked STV_PROTEXTED
/* Look up the target symbol. If the symbol is marked STV_PROTECTED
don't look in the global scope. */
if (__builtin_expect (ELFW(ST_VISIBILITY) (sym->st_other), 0) == 0)
{