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1998-03-30  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/generic/dl-sysdep.c (_dl_important_hwcaps): New
	function.

	* sysdeps/generic/dl-procinfo.h (HWCAP_IMPORTANT): New definition.

	* sysdeps/unix/sysv/linux/i386/dl-procinfo.h (_dl_hwcap_string):
	New function.
	(HWCAP_IMPORTANT): New definition.

1998-03-30 17:26  H.J. Lu  <hjl@gnu.org>

	* elf/dl-open.c (_dl_open): Fix a typo.
	(_dl_global_scope_alloc): Make it static.

	* nss/getXXent_r.c (REENTRANT_GETNAME): Avoid endless loop.
This commit is contained in:
Ulrich Drepper 1998-03-30 18:45:41 +00:00
parent 001426b899
commit e8e0bee5dd
5 changed files with 77 additions and 15 deletions
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18
ChangeLog
View File

@ -1,3 +1,19 @@
1998-03-30 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/generic/dl-sysdep.c (_dl_important_hwcaps): New
function.
* sysdeps/generic/dl-procinfo.h (HWCAP_IMPORTANT): New definition.
* sysdeps/unix/sysv/linux/i386/dl-procinfo.h (_dl_hwcap_string):
New function.
(HWCAP_IMPORTANT): New definition.
1998-03-30 17:26 H.J. Lu <hjl@gnu.org>
* elf/dl-open.c (_dl_open): Fix a typo.
(_dl_global_scope_alloc): Make it static.
1998-03-30 17:20 Ulrich Drepper <drepper@cygnus.com>
* Makerules: Remove duplicate rules to handle stamp.oS.
@ -158,6 +174,8 @@
* setjmp/tst-setjmp.c: Don't test __setjmp, test _setjmp instead.
* nss/getXXent_r.c (REENTRANT_GETNAME): Avoid endless loop.
1998-03-29 02:02 H.J. Lu <hjl@gnu.org>
* sysdeps/i386/i486/bits/string.h: Fix typos.

8
elf/dl-open.c
View File

@ -37,7 +37,7 @@ extern char **__libc_argv;
extern char **__environ;
size_t _dl_global_scope_alloc;
static size_t _dl_global_scope_alloc;
/* During the program run we must not modify the global data of
@ -121,7 +121,8 @@ _dl_open (const char *file, int mode)
{
/* This is the first dynamic object given global scope. */
_dl_global_scope_alloc = 8;
_dl_global_scope = malloc (8 * sizeof (struct link_map *));
_dl_global_scope = malloc (_dl_global_scope_alloc
* sizeof (struct link_map *));
if (! _dl_global_scope)
{
_dl_global_scope = _dl_default_scope;
@ -142,7 +143,8 @@ _dl_open (const char *file, int mode)
{
/* Must extend the list. */
struct link_map **new = realloc (_dl_global_scope,
_dl_global_scope_alloc * 2);
_dl_global_scope_alloc * 2
* sizeof (struct link_map *));
if (! new)
goto nomem;
_dl_global_scope_end = new + (_dl_global_scope_end -

3
sysdeps/generic/dl-procinfo.h
View File

@ -24,4 +24,7 @@
/* We cannot provide a general printing function. */
#define _dl_procinfo(word) -1
/* By default there is no important hardware capability. */
#define HWCAP_IMPORTANT (0)
#endif /* dl-procinfo.h */

34
sysdeps/generic/dl-sysdep.c
View File

@ -45,6 +45,7 @@ int __libc_enable_secure;
int __libc_multiple_libcs; /* Defining this here avoids the inclusion
of init-first. */
static ElfW(auxv_t) *_dl_auxv;
static unsigned long hwcap;
#ifndef DL_FIND_ARG_COMPONENTS
@ -235,10 +236,10 @@ _dl_show_auxv (void)
_dl_sysdep_message ("AT_PLATFORM: ", av->a_un.a_ptr, "\n", NULL);
break;
case AT_HWCAP:
if (_dl_procinfo (av->a_un.a_val) < 0)
hwcap = av->a_un.a_val;
if (_dl_procinfo (hwcap) < 0)
_dl_sysdep_message ("AT_HWCAP: ",
_itoa_word (av->a_un.a_val, buf + sizeof buf - 1,
16, 0),
_itoa_word (hwcap, buf + sizeof buf - 1, 16, 0),
"\n", NULL);
break;
}
@ -269,3 +270,30 @@ _dl_next_ld_env_entry (char ***position)
return result;
}
/* Return an array of useful/necessary hardware capability names. */
char **
_dl_important_hwcaps (size_t *sz)
{
/* Determine how many important bits are set. */
unsigned long int important = hwcap & HWCAP_IMPORTANT;
size_t cnt = 0;
size_t n;
char **result;
for (n = 0; (~((1UL << n) - 1) & important) != 0; ++n)
if ((important & (1UL << n)) != 0)
++cnt;
*sz = 0;
if (cnt == 0)
return NULL;
result = (char **) malloc (cnt * sizeof (char *));
if (result != NULL)
for (n = 0; (~((1UL << n) - 1) & important) != 0; ++n)
if ((important & (1UL << n)) != 0)
result[*sz++] = _dl_hwcap_string (n);
return result;
}

29
sysdeps/unix/sysv/linux/i386/dl-procinfo.h
View File

@ -21,19 +21,20 @@
#ifndef _DL_PROCINFO_H
#define _DL_PROCINFO_H 1
static const char *x86_cap_flags[] =
{
"fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
"cx8", "apic", "10", "sep", "mtrr", "pge", "mca", "cmov",
"fcmov", "17", "18", "19", "20", "21", "22", "mmx",
"osfxsr", "25", "26", "27", "28", "29", "30", "amd3d"
};
static inline int
__attribute__ ((unused))
_dl_procinfo (int word)
{
/* This table should match the information from arch/i386/kernel/setup.c
in the kernel sources. */
static const char *x86_cap_flags[] =
{
"fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
"cx8", "apic", "10", "sep", "mtrr", "pge", "mca", "cmov",
"fcmov", "17", "18", "19", "20", "21", "22", "mmx",
"cxmmx", "25", "26", "27", "28", "29", "30", "amd3d"
};
int i;
_dl_sysdep_message ("AT_HWCAP: ", NULL);
@ -47,6 +48,13 @@ _dl_procinfo (int word)
return 0;
}
static inline const char *
__attribute__ ((unused))
_dl_hwcap_string (int idx)
{
return x86_cap_flags[idx];
};
enum
{
HWCAP_I386_FPU = 1 << 0,
@ -66,8 +74,11 @@ enum
HWCAP_I386_CMOV = 1 << 15,
HWCAP_I386_FCMOV = 1 << 16,
HWCAP_I386_MMX = 1 << 23,
HWCAP_I386_CXMMX = 1 << 24,
HWCAP_I386_AMD3D = 1 << 31
HWCAP_I386_OSFXSR = 1 << 24,
HWCAP_I386_AMD3D = 1 << 31,
/* XXX Which others to add here? */
HWCAP_IMPORTANT = (HWCAP_I386_MMX)
};
#endif /* dl-procinfo.h */