Date: Tue, 17 Feb 2026 20:48:16 +0000 From: John Baldwin <jhb@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 5a02f004fbac - main - sdt: Disable SDT probes in kernel modules for GCC on aarch64 Message-ID: <6994d410.1f1ad.492b511f@gitrepo.freebsd.org>
index | next in thread | raw e-mail
The branch main has been updated by jhb: URL: https://cgit.FreeBSD.org/src/commit/?id=5a02f004fbacee9b2d59b59b11f8910e5736b89c commit 5a02f004fbacee9b2d59b59b11f8910e5736b89c Author: John Baldwin <jhb@FreeBSD.org> AuthorDate: 2026-02-17 20:48:04 +0000 Commit: John Baldwin <jhb@FreeBSD.org> CommitDate: 2026-02-17 20:48:04 +0000 sdt: Disable SDT probes in kernel modules for GCC on aarch64 For PIC code, the existing assembly constraints do compile on aarch64. Some kernel modules build ok using the 'p' constraint with the 'a' operand modifier, but not all. Reviewed by: markj Differential Revision: https://reviews.freebsd.org/D55166 --- sys/sys/sdt.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/sys/sys/sdt.h b/sys/sys/sdt.h index 0be4e9ba6240..26c60831f667 100644 --- a/sys/sys/sdt.h +++ b/sys/sys/sdt.h @@ -212,6 +212,12 @@ struct sdt_tracepoint { STAILQ_ENTRY(sdt_tracepoint) tracepoint_entry; }; +/* XXX: GCC is not able to compile probes in kernel modules for aarch64. */ +#if !defined(__clang__) && defined(KLD_MODULE) && defined(__aarch64__) +#undef __sdt_used +#define __sdt_used __unused +#define __SDT_PROBE(prov, mod, func, name, uniq, f, ...) +#else #define __SDT_PROBE(prov, mod, func, name, uniq, f, ...) do { \ __WEAK(__CONCAT(__start_set_, _SDT_TRACEPOINT_SET)); \ __WEAK(__CONCAT(__stop_set_, _SDT_TRACEPOINT_SET)); \ @@ -234,6 +240,7 @@ __sdt_probe##uniq:; \ f(_SDT_PROBE_NAME(prov, mod, func, name).id, __VA_ARGS__); \ } \ } while (0) +#endif #define _SDT_PROBE(prov, mod, func, name, uniq, f, ...) \ __SDT_PROBE(prov, mod, func, name, uniq, f, __VA_ARGS__) #define SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4) \home | help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?6994d410.1f1ad.492b511f>