Date: Wed, 25 Jun 2025 09:25:37 GMT From: Andrew Turner <andrew@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: fa1c23da01e0 - main - libsys: Add AT_HWCAP3 and AT_HWCAP4 Message-ID: <202506250925.55P9PbXe077179@gitrepo.freebsd.org>
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The branch main has been updated by andrew: URL: https://cgit.FreeBSD.org/src/commit/?id=fa1c23da01e07f308aa30d3cf3625d014c55ba94 commit fa1c23da01e07f308aa30d3cf3625d014c55ba94 Author: Andrew Turner <andrew@FreeBSD.org> AuthorDate: 2025-06-24 14:56:54 +0000 Commit: Andrew Turner <andrew@FreeBSD.org> CommitDate: 2025-06-24 16:26:40 +0000 libsys: Add AT_HWCAP3 and AT_HWCAP4 This is needed to read these values. Reviewed by: brooks, imp, kib Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D51006 --- lib/libsys/auxv.3 | 8 +++++++- lib/libsys/auxv.c | 28 ++++++++++++++++++++++++++-- 2 files changed, 33 insertions(+), 3 deletions(-) diff --git a/lib/libsys/auxv.3 b/lib/libsys/auxv.3 index 10ec10e8755c..b3b741937ac7 100644 --- a/lib/libsys/auxv.3 +++ b/lib/libsys/auxv.3 @@ -22,7 +22,7 @@ .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. .\" -.Dd September 16, 2022 +.Dd June 24, 2025 .Dt ELF_AUX_INFO 3 .Os .Sh NAME @@ -59,6 +59,12 @@ CPU / hardware feature flags .It AT_HWCAP2 CPU / hardware feature flags .Dv (sizeof(u_long)). +.It AT_HWCAP3 +CPU / hardware feature flags +.Dv (sizeof(u_long)). +.It AT_HWCAP4 +CPU / hardware feature flags +.Dv (sizeof(u_long)). .It AT_NCPUS Number of CPUs .Dv (sizeof(int)). diff --git a/lib/libsys/auxv.c b/lib/libsys/auxv.c index 1a4fd352950e..80702c66ba22 100644 --- a/lib/libsys/auxv.c +++ b/lib/libsys/auxv.c @@ -69,10 +69,10 @@ __init_elf_aux_vector(void) static int aux_once; static int pagesize, osreldate, canary_len, ncpus, pagesizes_len, bsdflags; -static int hwcap_present, hwcap2_present; +static int hwcap_present, hwcap2_present, hwcap3_present, hwcap4_present; static char *canary, *pagesizes, *execpath; static void *ps_strings, *timekeep; -static u_long hwcap, hwcap2; +static u_long hwcap, hwcap2, hwcap3, hwcap4; static void *fxrng_seed_version; static u_long usrstackbase, usrstacklim; @@ -123,6 +123,16 @@ init_aux(void) hwcap2 = (u_long)(aux->a_un.a_val); break; + case AT_HWCAP3: + hwcap3_present = 1; + hwcap3 = (u_long)(aux->a_un.a_val); + break; + + case AT_HWCAP4: + hwcap4_present = 1; + hwcap4 = (u_long)(aux->a_un.a_val); + break; + case AT_PAGESIZES: pagesizes = (char *)(aux->a_un.a_ptr); break; @@ -318,6 +328,20 @@ _elf_aux_info(int aux, void *buf, int buflen) } else res = ENOENT; break; + case AT_HWCAP3: + if (hwcap3_present && buflen == sizeof(u_long)) { + *(u_long *)buf = hwcap3; + res = 0; + } else + res = ENOENT; + break; + case AT_HWCAP4: + if (hwcap4_present && buflen == sizeof(u_long)) { + *(u_long *)buf = hwcap4; + res = 0; + } else + res = ENOENT; + break; case AT_PAGESIZES: if (pagesizes != NULL && pagesizes_len >= buflen) { memcpy(buf, pagesizes, buflen);
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