Date: Thu, 15 Jun 2017 02:08:10 -0700 From: Mark Millard <markmi@dsl-only.net> To: Warner Losh <imp@bsdimp.com> Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: Next up on creating armv7 MACHINE_ARCH: pre FCP stage Message-ID: <6EC26472-CE31-4B14-A049-3F153E590647@dsl-only.net> In-Reply-To: <C0FEFDC3-A873-4110-928A-E534D3FB5FE7@dsl-only.net> References: <CANCZdfqw4dwkrMtNO9zpdnuXkrmVrWf_M4Odcn5MY%2B0jz7h_dA@mail.gmail.com> <C0FEFDC3-A873-4110-928A-E534D3FB5FE7@dsl-only.net>
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On 2017-Jun-14, at 11:20 PM, Mark Millard <markmi at dsl-only.net> = wrote: > On 2017-Jun-14, at 10:22 PM, Warner Losh <imp at bsdimp.com> wrote: >=20 >> . . . >> Comments? >=20 > I booted Ubuntu Mate on a BPI-M3 and tried: >=20 > $ uname -p > armv7l >=20 > $ uname -ap > Linux bpi-iot-ros-ai 3.4.39-BPI-M3-Kernel #1 SMP PREEMPT Tue May 3 = 13:47:01 UTC 2016 armv7l armv7l armv7l GNU/Linux >=20 > I was actually thinking that a "hf" might > show up in how they name things if it was > a hard float based build. But looking I > see in /lib/ : >=20 > . . . > drwxr-xr-x 3 root root 16384 Nov 4 2016 arm-linux-gnueabihf > . . . > lrwxrwxrwx 1 root root 30 Oct 14 2016 ld-linux-armhf.so.3 -> = arm-linux-gnueabihf/ld-2.23.so > lrwxrwxrwx 1 root root 24 Apr 21 2016 ld-linux.so.3 -> = /lib/ld-linux-armhf.so.3 > . . . >=20 > and in /lib/arm-linux-gnueabihf/ : >=20 > lrwxrwxrwx 1 root root 10 Oct 14 2016 = /lib/arm-linux-gnueabihf/ld-linux-armhf.so.3 -> ld-2.23.so >=20 > so it appears armv7l was used for naming a > hard float build in uname -p. >=20 > Of course this does not check how uniform the > various linux distributions are about such > naming. >=20 > Still it may mean that for linux-matching "armv7" > might not be the right name for uname -p output. I tried another linux on the BPI-M3: gentoo . # uname -p ARMv7 Processor rev 5 (v7l) (Wow. Not what I expected.) # uname -pa Linux bananapi 3.4.39-BPI-M3-Kernel #1 SMP PREEMPT Tue May 3 13:47:01 = UTC 2016 armv7l ARMv7 Processor rev 5 (v7l) sun8i GNU/Linux # uname -m armv7l # uname -i sun8i # ls -l /lib/ld-* -rwxr-xr-x 1 root root 134192 Mar 26 2016 /lib/ld-2.21.so lrwxrwxrwx 1 root root 10 Mar 26 2016 /lib/ld-linux-armhf.so.3 -> = ld-2.21.so So again armv7l seems to be the base name used for a hardfloat little-endian context --although it appears that "uname -m" gives text more likely to be used in testing for how to configure to match the live context. "uname -p" seems far less standardized for its results. The same for "uname -i". =3D=3D=3D Mark Millard markmi at dsl-only.net
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