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ARM: Add support for AT_HWCAP2 in _dl_procinfo

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Add support for the new HWCAP2 values for ARMv8 added in the
3.15 kernel. Tested using QEMU which supports these extensions.

ChangeLog:

2014-06-25  Will Newton  <will.newton@linaro.org>

	* sysdeps/unix/sysv/linux/arm/dl-procinfo.c
	(_dl_arm_cap_flags): Add HWCAP2 values.
	* sysdeps/unix/sysv/linux/arm/dl-procinfo.h
	(_DL_HWCAP_COUNT): Increase to 37.
	(_DL_HWCAP_LAST): New define.
	(_DL_HWCAP2_LAST): New define.
	(_dl_procinfo): Add support for printing
	AT_HWCAP2 entries.
	(_dl_string_hwcap): Use _dl_hwcap_string.
This commit is contained in:
Will Newton 2014-06-25 12:21:17 +01:00
parent 6eaa65cefb
commit 9aea0cb842
3 changed files with 57 additions and 29 deletions
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12
ChangeLog
View File

@ -1,3 +1,15 @@
2014-06-25 Will Newton <will.newton@linaro.org>
* sysdeps/unix/sysv/linux/arm/dl-procinfo.c
(_dl_arm_cap_flags): Add HWCAP2 values.
* sysdeps/unix/sysv/linux/arm/dl-procinfo.h
(_DL_HWCAP_COUNT): Increase to 37.
(_DL_HWCAP_LAST): New define.
(_DL_HWCAP2_LAST): New define.
(_dl_procinfo): Add support for printing
AT_HWCAP2 entries.
(_dl_string_hwcap): Use _dl_hwcap_string.
2014-06-25 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
* sysdeps/powerpc/fpu/libm-test-ulps: Update.

5
sysdeps/unix/sysv/linux/arm/dl-procinfo.c
View File

@ -23,7 +23,7 @@
If anything should be added here check whether the size of each string
is still ok with the given array size.
All the #ifdefs in the definitions ar equite irritating but
All the #ifdefs in the definitions are quite irritating but
necessary if we want to avoid duplicating the information. There
are three different modes:
@ -46,13 +46,14 @@
#if !defined PROCINFO_DECL && defined SHARED
._dl_arm_cap_flags
#else
PROCINFO_CLASS const char _dl_arm_cap_flags[22][10]
PROCINFO_CLASS const char _dl_arm_cap_flags[37][10]
#endif
#ifndef PROCINFO_DECL
= {
"swp", "half", "thumb", "26bit", "fastmult", "fpa", "vfp", "edsp",
"java", "iwmmxt", "crunch", "thumbee", "neon", "vfpv3", "vfpv3d16",
"tls", "vfpv4", "idiva", "idivt", "vfpd32", "lpae", "evtstrm",
"aes", "pmull", "sha1", "sha2", "crc32",
}
#endif
#if !defined SHARED || defined PROCINFO_DECL

69
sysdeps/unix/sysv/linux/arm/dl-procinfo.h
View File

@ -23,33 +23,18 @@
#include <ldsodefs.h>
#include <sysdep.h>
#define _DL_HWCAP_COUNT 22
#define _DL_HWCAP_COUNT 37
/* Low 22 bits are allocated in HWCAP. */
#define _DL_HWCAP_LAST 21
/* Low 5 bits are allocated in HWCAP2. */
#define _DL_HWCAP2_LAST 4
/* The kernel provides platform data but it is not interesting. */
#define _DL_HWCAP_PLATFORM 0
#define _DL_HWCAP_PLATFORM 0
static inline int
__attribute__ ((unused))
_dl_procinfo (unsigned int type, unsigned long int word)
{
int i;
/* Fallback to unknown output mechanism. */
if (type == AT_HWCAP2)
return -1;
_dl_printf ("AT_HWCAP: ");
for (i = 0; i < _DL_HWCAP_COUNT; ++i)
if (word & (1 << i))
_dl_printf (" %s", GLRO(dl_arm_cap_flags)[i]);
_dl_printf ("\n");
return 0;
}
static inline const char *
__attribute__ ((unused))
_dl_hwcap_string (int idx)
@ -57,17 +42,47 @@ _dl_hwcap_string (int idx)
return GLRO(dl_arm_cap_flags)[idx];
};
static inline int
__attribute__ ((unused))
_dl_procinfo (unsigned int type, unsigned long int word)
{
switch(type)
{
case AT_HWCAP:
_dl_printf ("AT_HWCAP: ");
for (int i = 0; i <= _DL_HWCAP_LAST; ++i)
if (word & (1 << i))
_dl_printf (" %s", _dl_hwcap_string (i));
break;
case AT_HWCAP2:
{
unsigned int offset = _DL_HWCAP_LAST + 1;
_dl_printf ("AT_HWCAP2: ");
for (int i = 0; i <= _DL_HWCAP2_LAST; ++i)
if (word & (1 << i))
_dl_printf (" %s", _dl_hwcap_string (offset + i));
break;
}
default:
/* This should not happen. */
return -1;
}
_dl_printf ("\n");
return 0;
}
#define HWCAP_IMPORTANT (HWCAP_ARM_VFP | HWCAP_ARM_NEON)
static inline int
__attribute__ ((unused))
_dl_string_hwcap (const char *str)
{
int i;
for (i = 0; i < _DL_HWCAP_COUNT; i++)
for (int i = 0; i < _DL_HWCAP_COUNT; i++)
{
if (strcmp (str, GLRO(dl_arm_cap_flags)[i]) == 0)
if (strcmp (str, _dl_hwcap_string (i)) == 0)
return i;
}
return -1;