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| author | Manjunath Matti <mmatti@linux.ibm.com> | 2024-03-19 15:29:48 -0500 |
|---|---|---|
| committer | Peter Bergner <bergner@linux.ibm.com> | 2024-03-20 18:09:32 -0500 |
| commit | ee7f4c54e19738c2c27d3846e1e9b3595c89221f (patch) | |
| tree | 01fa49f5b8d720ea62de03f1ab9331fb7949cbe7 /elf/elf.h | |
| parent | 71fcdba577884627c3ee4e43beb915da752efb1f (diff) | |
| download | glibc-ee7f4c54e19738c2c27d3846e1e9b3595c89221f.zip glibc-ee7f4c54e19738c2c27d3846e1e9b3595c89221f.tar.gz glibc-ee7f4c54e19738c2c27d3846e1e9b3595c89221f.tar.bz2 | |
powerpc: Add HWCAP3/HWCAP4 data to TCB for Power Architecture.
This patch adds a new feature for powerpc. In order to get faster
access to the HWCAP3/HWCAP4 masks, similar to HWCAP/HWCAP2 (i.e. for
implementing __builtin_cpu_supports() in GCC) without the overhead of
reading them from the auxiliary vector, we now reserve space for them
in the TCB.
Suggested-by: Peter Bergner <bergner@linux.ibm.com>
Reviewed-by: Peter Bergner <bergner@linux.ibm.com>
(cherry picked from commit 3ab9b88e2ac91062b6d493fe32bd101a55006c6a)
Diffstat (limited to 'elf/elf.h')
| -rw-r--r-- | elf/elf.h | 4 |
1 files changed, 4 insertions, 0 deletions
@@ -1234,6 +1234,10 @@ typedef struct #define AT_RSEQ_FEATURE_SIZE 27 /* rseq supported feature size. */ #define AT_RSEQ_ALIGN 28 /* rseq allocation alignment. */ +/* More machine-dependent hints about processor capabilities. */ +#define AT_HWCAP3 29 /* extension of AT_HWCAP. */ +#define AT_HWCAP4 30 /* extension of AT_HWCAP. */ + #define AT_EXECFN 31 /* Filename of executable. */ /* Pointer to the global system page used for system calls and other |