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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> | 2024-03-19 17:19:27 -0500 |
| commit | 3ab9b88e2ac91062b6d493fe32bd101a55006c6a (patch) | |
| tree | a13cf4a7a73bb6f77748d2bfefedce381591be56 /sysdeps/unix/sysv/linux | |
| parent | 3d53d18fc71c5d9ef4773b8bce04d54b80181926 (diff) | |
| download | glibc-3ab9b88e2ac91062b6d493fe32bd101a55006c6a.tar.gz glibc-3ab9b88e2ac91062b6d493fe32bd101a55006c6a.tar.xz glibc-3ab9b88e2ac91062b6d493fe32bd101a55006c6a.zip | |
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. This is an ABI change for GLIBC 2.39. Suggested-by: Peter Bergner <bergner@linux.ibm.com> Reviewed-by: Peter Bergner <bergner@linux.ibm.com>
Diffstat (limited to 'sysdeps/unix/sysv/linux')
| -rw-r--r-- | sysdeps/unix/sysv/linux/dl-parse_auxv.h | 2 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/dl-sysdep.c | 2 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/cpu-features.c | 2 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/cpu-features.h | 2 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/libc-start.c | 6 |
5 files changed, 14 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/dl-parse_auxv.h b/sysdeps/unix/sysv/linux/dl-parse_auxv.h index e3d758b163..ea2a58ecb1 100644 --- a/sysdeps/unix/sysv/linux/dl-parse_auxv.h +++ b/sysdeps/unix/sysv/linux/dl-parse_auxv.h @@ -47,6 +47,8 @@ void _dl_parse_auxv (ElfW(auxv_t) *av, dl_parse_auxv_t auxv_values) GLRO(dl_platform) = (void *) auxv_values[AT_PLATFORM]; GLRO(dl_hwcap) = auxv_values[AT_HWCAP]; GLRO(dl_hwcap2) = auxv_values[AT_HWCAP2]; + GLRO(dl_hwcap3) = auxv_values[AT_HWCAP3]; + GLRO(dl_hwcap4) = auxv_values[AT_HWCAP4]; GLRO(dl_clktck) = auxv_values[AT_CLKTCK]; GLRO(dl_fpu_control) = auxv_values[AT_FPUCW]; _dl_random = (void *) auxv_values[AT_RANDOM]; diff --git a/sysdeps/unix/sysv/linux/dl-sysdep.c b/sysdeps/unix/sysv/linux/dl-sysdep.c index ad3692d738..e1b14e9eb3 100644 --- a/sysdeps/unix/sysv/linux/dl-sysdep.c +++ b/sysdeps/unix/sysv/linux/dl-sysdep.c @@ -197,6 +197,8 @@ _dl_show_auxv (void) [AT_SYSINFO_EHDR - 2] = { "SYSINFO_EHDR: 0x", hex }, [AT_RANDOM - 2] = { "RANDOM: 0x", hex }, [AT_HWCAP2 - 2] = { "HWCAP2: 0x", hex }, + [AT_HWCAP3 - 2] = { "HWCAP3: 0x", hex }, + [AT_HWCAP4 - 2] = { "HWCAP4: 0x", hex }, [AT_MINSIGSTKSZ - 2] = { "MINSIGSTKSZ: ", dec }, [AT_L1I_CACHESIZE - 2] = { "L1I_CACHESIZE: ", dec }, [AT_L1I_CACHEGEOMETRY - 2] = { "L1I_CACHEGEOMETRY: 0x", hex }, diff --git a/sysdeps/unix/sysv/linux/powerpc/cpu-features.c b/sysdeps/unix/sysv/linux/powerpc/cpu-features.c index 8e8a5ec2ea..a947d62db6 100644 --- a/sysdeps/unix/sysv/linux/powerpc/cpu-features.c +++ b/sysdeps/unix/sysv/linux/powerpc/cpu-features.c @@ -94,6 +94,8 @@ init_cpu_features (struct cpu_features *cpu_features, uint64_t hwcaps[]) which are set by __tcb_parse_hwcap_and_convert_at_platform. */ cpu_features->hwcap = hwcaps[0]; cpu_features->hwcap2 = hwcaps[1]; + cpu_features->hwcap3 = hwcaps[2]; + cpu_features->hwcap4 = hwcaps[3]; /* Default is to use aligned memory access on optimized function unless tunables is enable, since for this case user can explicit disable unaligned optimizations. */ diff --git a/sysdeps/unix/sysv/linux/powerpc/cpu-features.h b/sysdeps/unix/sysv/linux/powerpc/cpu-features.h index 1294f0b601..e9eb6a13c8 100644 --- a/sysdeps/unix/sysv/linux/powerpc/cpu-features.h +++ b/sysdeps/unix/sysv/linux/powerpc/cpu-features.h @@ -26,6 +26,8 @@ struct cpu_features bool use_cached_memopt; unsigned long int hwcap; unsigned long int hwcap2; + unsigned long int hwcap3; + unsigned long int hwcap4; }; static const char hwcap_names[] = { diff --git a/sysdeps/unix/sysv/linux/powerpc/libc-start.c b/sysdeps/unix/sysv/linux/powerpc/libc-start.c index a4705daf1c..6a00cd88cd 100644 --- a/sysdeps/unix/sysv/linux/powerpc/libc-start.c +++ b/sysdeps/unix/sysv/linux/powerpc/libc-start.c @@ -87,6 +87,12 @@ __libc_start_main_impl (int argc, char **argv, case AT_HWCAP2: _dl_hwcap2 = (unsigned long int) av->a_un.a_val; break; + case AT_HWCAP3: + _dl_hwcap3 = (unsigned long int) av->a_un.a_val; + break; + case AT_HWCAP4: + _dl_hwcap4 = (unsigned long int) av->a_un.a_val; + break; case AT_PLATFORM: _dl_platform = (void *) av->a_un.a_val; break; |