Date: Mon, 02 Feb 2026 17:20:02 +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: f7144a9c4a11 - main - sdt: Use the "cc" operand modifier for the address of probes for GCC 15+ Message-ID: <6980dcc2.2191a.ebc239a@gitrepo.freebsd.org>
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The branch main has been updated by jhb: URL: https://cgit.FreeBSD.org/src/commit/?id=f7144a9c4a11214a71a3091ce1b232a8243b83ea commit f7144a9c4a11214a71a3091ce1b232a8243b83ea Author: John Baldwin <jhb@FreeBSD.org> AuthorDate: 2026-02-02 17:19:51 +0000 Commit: John Baldwin <jhb@FreeBSD.org> CommitDate: 2026-02-02 17:19:51 +0000 sdt: Use the "cc" operand modifier for the address of probes for GCC 15+ This is required for GCC on RISC-V. The GCC 15 docs claim that "cc" is similar to "c" except that it "tries harder". NB: I have not yet found a way to make the DTrace probes compile on RISC-V with older versions of GCC. Reviewed by: markj Differential Revision: https://reviews.freebsd.org/D54964 --- sys/sys/sdt.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sys/sys/sdt.h b/sys/sys/sdt.h index f705be915684..0be4e9ba6240 100644 --- a/sys/sys/sdt.h +++ b/sys/sys/sdt.h @@ -194,8 +194,12 @@ SET_DECLARE(sdt_argtypes_set, struct sdt_argtype); #define _SDT_ASM_PROBE_CONSTRAINT "i" #endif #ifndef _SDT_ASM_PROBE_OPERAND +#if !defined(__clang__) && __GNUC_PREREQ__(15, 0) +#define _SDT_ASM_PROBE_OPERAND "cc" +#else #define _SDT_ASM_PROBE_OPERAND "c" #endif +#endif /* * The asm below generates records corresponding to the structure's layout, sohome | help
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