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2001-01-05  H.J. Lu  <hjl@gnu.org>

	* elf/dl-support.c (non_dynamic_init): Move the auxiliary
	vector checking to ...
	(_dl_aux_init): Here. New function. Defined only if
	HAVE_AUX_VECTOR is defined.

	* sysdeps/generic/libc-start.c (__libc_start_main): Call
	_dl_aux_init for static binaries if HAVE_AUX_VECTOR is defined.

	* sysdeps/powerpc/elf/libc-start.c (__libc_start_main): Call
	_dl_aux_init.

	* sysdeps/unix/sysv/linux/ldsodefs.h (DL_FIND_AUXV): Removed.
	(HAVE_AUX_VECTOR): Defined.
	(_dl_aux_init): Declared.
This commit is contained in:
Ulrich Drepper 2001-01-07 02:00:21 +00:00
parent bf798a9534
commit e4a5f77de6
6 changed files with 45 additions and 24 deletions
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17
ChangeLog
View File

@ -1,3 +1,20 @@
2001-01-05 H.J. Lu <hjl@gnu.org>
* elf/dl-support.c (non_dynamic_init): Move the auxiliary
vector checking to ...
(_dl_aux_init): Here. New function. Defined only if
HAVE_AUX_VECTOR is defined.
* sysdeps/generic/libc-start.c (__libc_start_main): Call
_dl_aux_init for static binaries if HAVE_AUX_VECTOR is defined.
* sysdeps/powerpc/elf/libc-start.c (__libc_start_main): Call
_dl_aux_init.
* sysdeps/unix/sysv/linux/ldsodefs.h (DL_FIND_AUXV): Removed.
(HAVE_AUX_VECTOR): Defined.
(_dl_aux_init): Declared.
2001-01-05 Ben Collins <bcollins@debian.org>
* manual/string.texi (Finding Tokens in a String): Document XPG

23
elf/dl-support.c
View File

@ -108,34 +108,31 @@ int _dl_starting_up = 1;
__libc_lock_define_initialized_recursive (, _dl_load_lock)
#ifdef HAVE_AUX_VECTOR
extern int _dl_clktck;
static void non_dynamic_init (int argc, char **argv, char **envp)
__attribute__ ((unused));
static void
non_dynamic_init (int argc, char **argv, char **envp)
void
internal_function
_dl_aux_init (ElfW(auxv_t) *av)
{
#ifdef DL_FIND_AUXV
ElfW(auxv_t) *av;
DL_FIND_AUXV (av, envp);
for (; av->a_type != AT_NULL; ++av)
switch (av->a_type)
{
case AT_PAGESZ:
_dl_pagesize = av->a_un.a_val;
break;
case AT_PLATFORM:
_dl_platform = av->a_un.a_ptr;
break;
case AT_CLKTCK:
_dl_clktck = av->a_un.a_val;
break;
}
}
#endif
static void non_dynamic_init (void) __attribute__ ((unused));
static void
non_dynamic_init (void)
{
if (!_dl_pagesize)
_dl_pagesize = __getpagesize ();

2
manual/string.texi
View File

@ -1464,7 +1464,7 @@ spirit to the GNU version, but may modify the @var{path} by removing
trailing '/' characters. If the @var{path} is made up entirely of '/'
characters, then "/" will be returned. Also, if @var{path} is
@code{NULL} or an empty string, then "." is returned. The prototype for
the XPG version can be found in @file{string.h}.
the XPG version can be found in @file{libgen.h}.
Example of using XPG @code{basename}:

11
sysdeps/generic/libc-start.c
View File

@ -59,6 +59,10 @@ BP_SYM (__libc_start_main) (int (*main) (int, char **, char **),
#endif
#ifndef SHARED
# ifdef HAVE_AUX_VECTOR
void *__unbounded *__unbounded auxvec;
# endif
/* The next variable is only here to work around a bug in gcc <= 2.7.2.2.
If the address would be taken inside the expression the optimizer
would try to be too smart and throws it away. Grrr. */
@ -85,6 +89,13 @@ BP_SYM (__libc_start_main) (int (*main) (int, char **, char **),
loader did the work already. */
if (__builtin_expect (__libc_enable_secure, 0))
__libc_check_standard_fds ();
# ifdef HAVE_AUX_VECTOR
for (auxvec = (void *__unbounded *__unbounded) ubp_ev;
*auxvec; auxvec++);
++auxvec;
_dl_aux_init ((ElfW(auxv_t) *) auxvec);
# endif
#endif
/* Register the destructor of the dynamic linker if there is any. */

1
sysdeps/powerpc/elf/libc-start.c
View File

@ -76,6 +76,7 @@ BP_SYM (__libc_start_main) (int argc, char *__unbounded *__unbounded ubp_av,
while (*(char *__unbounded *__unbounded) auxvec != NULL)
++auxvec;
++auxvec;
_dl_aux_init ((ElfW(auxv_t) *) auxvec);
rtld_fini = NULL;
}

15
sysdeps/unix/sysv/linux/ldsodefs.h
View File

@ -24,15 +24,10 @@
/* Now define our stuff. */
/* Locating the auxiliary vector. */
#ifndef DL_FIND_AUXV
# define DL_FIND_AUXV(auxp, envp) \
do { \
void **_tmp; \
for (_tmp = (void **) (envp); *_tmp; ++_tmp) \
continue; \
(auxp) = (void *) ++_tmp; \
} while (0)
#endif
/* We have the auxiliary vector. */
#define HAVE_AUX_VECTOR
/* Used by static binaries to check the auxiliary vector. */
extern void _dl_aux_init (ElfW(auxv_t) *av) internal_function;
#endif /* ldsodefs.h */