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author | Will Newton <will.newton@linaro.org> | 2014-06-25 12:21:17 +0100 |
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committer | Will Newton <will.newton@linaro.org> | 2014-06-25 16:02:04 +0100 |
commit | 9aea0cb842f02098d9c09b4855f883ddc8a8a97e (patch) | |
tree | a7b9c14ad610066b5ffabf1c1a68cf986d9c636f /sysdeps/unix/sysv/linux/arm/dl-procinfo.h | |
parent | 6eaa65cefb0224a3cf6ee4b6649e3576802487b3 (diff) | |
download | glibc-9aea0cb842f02098d9c09b4855f883ddc8a8a97e.tar.gz glibc-9aea0cb842f02098d9c09b4855f883ddc8a8a97e.tar.xz glibc-9aea0cb842f02098d9c09b4855f883ddc8a8a97e.zip |
ARM: Add support for AT_HWCAP2 in _dl_procinfo
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.
Diffstat (limited to 'sysdeps/unix/sysv/linux/arm/dl-procinfo.h')
-rw-r--r-- | sysdeps/unix/sysv/linux/arm/dl-procinfo.h | 67 |
1 files changed, 41 insertions, 26 deletions
diff --git a/sysdeps/unix/sysv/linux/arm/dl-procinfo.h b/sysdeps/unix/sysv/linux/arm/dl-procinfo.h index 20a3e92bbb..f7557b9d86 100644 --- a/sysdeps/unix/sysv/linux/arm/dl-procinfo.h +++ b/sysdeps/unix/sysv/linux/arm/dl-procinfo.h @@ -23,32 +23,17 @@ #include <ldsodefs.h> #include <sysdep.h> -#define _DL_HWCAP_COUNT 22 +#define _DL_HWCAP_COUNT 37 -/* The kernel provides platform data but it is not interesting. */ -#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: "); +/* Low 22 bits are allocated in HWCAP. */ +#define _DL_HWCAP_LAST 21 - for (i = 0; i < _DL_HWCAP_COUNT; ++i) - if (word & (1 << i)) - _dl_printf (" %s", GLRO(dl_arm_cap_flags)[i]); +/* Low 5 bits are allocated in HWCAP2. */ +#define _DL_HWCAP2_LAST 4 - _dl_printf ("\n"); +/* The kernel provides platform data but it is not interesting. */ +#define _DL_HWCAP_PLATFORM 0 - return 0; -} static inline const char * __attribute__ ((unused)) @@ -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; |