Date: Mon, 16 Feb 2026 10:30:15 +0000 From: Olivier Certner <olce@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 7c2fc4419db4 - main - sys/compat/freebsd32: FF clock struct: Don't pack, use 'ffcounter32' Message-ID: <6992f1b7.2730d.2ecb61cc@gitrepo.freebsd.org>
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The branch main has been updated by olce: URL: https://cgit.FreeBSD.org/src/commit/?id=7c2fc4419db43a8a7d1886b0b8e08aa97bfa31e4 commit 7c2fc4419db43a8a7d1886b0b8e08aa97bfa31e4 Author: Olivier Certner <olce@FreeBSD.org> AuthorDate: 2026-02-13 17:03:31 +0000 Commit: Olivier Certner <olce@FreeBSD.org> CommitDate: 2026-02-16 10:28:48 +0000 sys/compat/freebsd32: FF clock struct: Don't pack, use 'ffcounter32' Packing 'struct ffclock_estimate32', in absence of substitution of 'ffcounter' (some 'uint64_t') by a 32-bit compatible type, was necessary on amd64 since 'uint64_t' is 8-byte aligned, which leaves a padding gap of 4-byte between fields 'update_time' and 'update_ffcount'. This gap does not exist on i386 (or amd64 32-bit mode), as 'uint64_t' there is only 4-byte aligned. Change the type of the 'update_ffcount' and 'leapsec_next' fields to the recently introduced 'freebsd32_uint64_t', and adapt copy-in and copy-out accordingly. Using `CP()` previously worked due to the '__packed__' attribute. Reviewed by: kib MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D55282 --- sys/compat/freebsd32/freebsd32.h | 12 +++++------- sys/compat/freebsd32/freebsd32_misc.c | 8 ++++---- 2 files changed, 9 insertions(+), 11 deletions(-) diff --git a/sys/compat/freebsd32/freebsd32.h b/sys/compat/freebsd32/freebsd32.h index 5210ce55b228..1436b630689f 100644 --- a/sys/compat/freebsd32/freebsd32.h +++ b/sys/compat/freebsd32/freebsd32.h @@ -60,8 +60,8 @@ struct bintime32 { struct ffclock_estimate32 { struct bintime32 update_time; - ffcounter update_ffcount; - ffcounter leapsec_next; + freebsd32_uint64_t update_ffcount; + freebsd32_uint64_t leapsec_next; freebsd32_uint64_t period; uint32_t errb_abs; uint32_t errb_rate; @@ -69,11 +69,9 @@ struct ffclock_estimate32 { int16_t leapsec_total; int8_t leapsec; int8_t _pad; -} -#if defined(__amd64__) -__attribute__((packed)) -#endif -; +}; +_Static_assert(sizeof(ffcounter) == sizeof(freebsd32_uint64_t), + "'ffcounter' size discrepancy'"); #if defined(__amd64__) || defined(__i386__) _Static_assert(sizeof(struct ffclock_estimate32) == 52, "ffclock_estimate32 size"); #else diff --git a/sys/compat/freebsd32/freebsd32_misc.c b/sys/compat/freebsd32/freebsd32_misc.c index 457e599c22d2..1064987c3abf 100644 --- a/sys/compat/freebsd32/freebsd32_misc.c +++ b/sys/compat/freebsd32/freebsd32_misc.c @@ -4147,8 +4147,8 @@ freebsd32_ffclock_setestimate(struct thread *td, CP(cest.update_time, cest32.update_time, sec); memcpy(&cest.update_time.frac, &cest32.update_time.frac, sizeof(uint64_t)); - CP(cest, cest32, update_ffcount); - CP(cest, cest32, leapsec_next); + FU64_CP(cest, cest32, update_ffcount); + FU64_CP(cest, cest32, leapsec_next); FU64_CP(cest, cest32, period); CP(cest, cest32, errb_abs); CP(cest, cest32, errb_rate); @@ -4177,8 +4177,8 @@ freebsd32_ffclock_getestimate(struct thread *td, CP(cest32.update_time, cest.update_time, sec); memcpy(&cest32.update_time.frac, &cest.update_time.frac, sizeof(uint64_t)); - CP(cest32, cest, update_ffcount); - CP(cest32, cest, leapsec_next); + FU64_CP(cest32, cest, update_ffcount); + FU64_CP(cest32, cest, leapsec_next); FU64_CP(cest32, cest, period); CP(cest32, cest, errb_abs); CP(cest32, cest, errb_rate);home | help
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