Date: Sun, 27 Nov 2011 18:51:03 -0500 From: Ryan Stone <rysto32@gmail.com> To: Andriy Gapon <avg@freebsd.org> Cc: FreeBSD current <freebsd-current@freebsd.org> Subject: Re: array index of '-16' indexes before the beginning of the array Message-ID: <CAFMmRNyN_bve%2B0yY44=i_6UdKrxvN0%2BF9yVq7Fp45rqmX1EbwQ@mail.gmail.com> In-Reply-To: <4ED2CAFF.7070608@FreeBSD.org> References: <4ED2CAFF.7070608@FreeBSD.org>
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On Sun, Nov 27, 2011 at 6:42 PM, Andriy Gapon <avg@freebsd.org> wrote: > > Looks like clang has found a real issue here: > /usr/src/sys/x86/x86/local_apic.c:311:2: warning: array index of '-16' in= dexes > before the beginning of the array [-Warray-bounds] > =A0 =A0 =A0 =A0lapics[apic_id].la_ioint_irqs[IDT_DTRACE_RET - APIC_IO_INT= S] =3D > IRQ_DTRACE_RET; > > IDT_DTRACE_RET (0x20) indeed seems to be less than APIC_IO_INTS. Uh-oh, I appear to have broken this in r227290. I'll try to figure out what's actually supposed to be done here.
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