Date: Mon, 8 Mar 2021 19:07:32 GMT From: Brandon Bergren <bdragon@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 1a4b9c2827dc - stable/12 - [PowerPC] [PowerPCSPE] Fix multiple issues in fpsetmask(). Message-ID: <202103081907.128J7Wlv063107@gitrepo.freebsd.org>
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The branch stable/12 has been updated by bdragon: URL: https://cgit.FreeBSD.org/src/commit/?id=1a4b9c2827dc74867ceed85febf89f3924605c43 commit 1a4b9c2827dc74867ceed85febf89f3924605c43 Author: Brandon Bergren <bdragon@FreeBSD.org> AuthorDate: 2021-03-01 03:06:59 +0000 Commit: Brandon Bergren <bdragon@FreeBSD.org> CommitDate: 2021-03-08 18:58:37 +0000 [PowerPC] [PowerPCSPE] Fix multiple issues in fpsetmask(). Building R on powerpc64 exposed a problem in fpsetmask() whereby we were not properly clamping the provided mask to the valid range. This same issue affects powerpc and powerpcspe. Properly limit the range of bits that can be set via fpsetmask(). While here, use the correct fp_except_t type instead of fp_rnd_t. Reported by: pkubaj, jhibbits (in IRC) Sponsored by: Tag1 Consulting, Inc. (cherry picked from commit 384ee7cc6e9e4ddc91a6e9e623fcbbe5826bce38) (cherry picked from commit 8b96d6ac04e7e761ec6b9eff47c801a2b89fbd6d) --- lib/libc/powerpc/gen/fpsetmask.c | 6 +++--- lib/libc/powerpcspe/gen/fpsetmask.c | 6 +++--- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/lib/libc/powerpc/gen/fpsetmask.c b/lib/libc/powerpc/gen/fpsetmask.c index 4d63552470be..f5d52eec5482 100644 --- a/lib/libc/powerpc/gen/fpsetmask.c +++ b/lib/libc/powerpc/gen/fpsetmask.c @@ -43,11 +43,11 @@ fp_except_t fpsetmask(fp_except_t mask) { u_int64_t fpscr; - fp_rnd_t old; + fp_except_t old; __asm__("mffs %0" : "=f"(fpscr)); - old = (fp_rnd_t)((fpscr >> 3) & 0x1f); - fpscr = (fpscr & 0xffffff07) | (mask << 3); + old = (fp_except_t)((fpscr >> 3) & 0x1f); + fpscr = (fpscr & 0xffffff07) | ((mask & 0x1f) << 3); __asm__ __volatile("mtfsf 0xff,%0" :: "f"(fpscr)); return (old); } diff --git a/lib/libc/powerpcspe/gen/fpsetmask.c b/lib/libc/powerpcspe/gen/fpsetmask.c index e71b822d6e0b..2f48802d9ca3 100644 --- a/lib/libc/powerpcspe/gen/fpsetmask.c +++ b/lib/libc/powerpcspe/gen/fpsetmask.c @@ -42,11 +42,11 @@ fp_except_t fpsetmask(fp_except_t mask) { uint32_t fpscr; - fp_rnd_t old; + fp_except_t old; __asm__ __volatile("mfspr %0, %1" : "=r"(fpscr) : "K"(SPR_SPEFSCR)); - old = (fp_rnd_t)((fpscr >> 2) & 0x1f); - fpscr = (fpscr & 0xffffff83) | (mask << 2); + old = (fp_except_t)((fpscr >> 2) & 0x1f); + fpscr = (fpscr & 0xffffff83) | ((mask & 0x1f) << 2); __asm__ __volatile("mtspr %1,%0;isync" :: "r"(fpscr), "K"(SPR_SPEFSCR)); return (old); }
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