Date: Mon, 17 Oct 2016 17:25:25 -0400 From: Shawn Webb <shawn.webb@hardenedbsd.org> To: Ed Maste <emaste@freebsd.org> Cc: "freebsd-toolchain@freebsd.org" <freebsd-toolchain@freebsd.org> Subject: Re: RPI3 - clang 3.9.0 issues Message-ID: <20161017212525.GB20952@mutt-hardenedbsd> In-Reply-To: <CAPyFy2DMhkUY3MV=%2BbXmFeCiJidQa%2B72_MacLaRXyO2DhnZtTg@mail.gmail.com> References: <20161017211143.GA20952@mutt-hardenedbsd> <CAPyFy2DMhkUY3MV=%2BbXmFeCiJidQa%2B72_MacLaRXyO2DhnZtTg@mail.gmail.com>
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--O5XBE6gyVG5Rl6Rj Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Oct 17, 2016 at 05:18:42PM -0400, Ed Maste wrote: > On 17 October 2016 at 17:11, Shawn Webb <shawn.webb@hardenedbsd.org> wrot= e: > > > > When the kernel is compiled with clang 3.9.0, it seems to freeze after > > being loaded by the clang 3.8 boot1.efi/loader.efi. I'm unsure if it's > > actually frozen or if simply nothing is being outputted to the console. > > Either way, I don't see console messages and the RPI3 _appears_ frozen. >=20 > This will probably be a bit tricky to track down. Have you tried > booting a Clang 3.8-compiled kernel with a Clang 3.9 boot1.efi and > loader.efi? Do you get any kernel output, or nothing after the last > lines of loader output? I haven't. clang 3.9 boot1.efi won't run in the slightest. It crashes prior to me being able to even use printf. I could try a 3.9 loader.efi with some extra printf debugging, though. A clang 3.8 kernel works perfectly when matched with a clang 3.8 boot1.efi and loader.efi. The clang 3.9 kernel doesn't output a single thing. I could probably try some printf based debugging early in the process. But it's clear that loader.efi loads the kernel and tries to execute it. Thanks, --=20 Shawn Webb Cofounder and Security Engineer HardenedBSD GPG Key ID: 0x6A84658F52456EEE GPG Key Fingerprint: 2ABA B6BD EF6A F486 BE89 3D9E 6A84 658F 5245 6EEE --O5XBE6gyVG5Rl6Rj Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJYBUHCAAoJEGqEZY9SRW7uWXUP/3E7aNo4UVp0FMe4py1gG7D/ fNU5jK4Q/22E4oJg47v70WyAdFdfpFxjrqre45ntwEtBoXxIR0eNhzZpKQIWOGf7 gM3n/WU+8doCmNQ6V/HL5IAxoBnxPtb8cBjIcp4qDlPH0FHtfpx2xcndhC1n3JIw 1kJywinIDGtnT1PptylyaWaRs/oi6OtS7TpZTJ4OJ3CKtM6ZcY8k/cTKMd9rqhpF Zyyf7mPbpZaWz/9P8box4yR5399mGYbNoxPzdICTZQm6u0sWNeV9ZXTAK6p1jUVz uOnRujNVxAHW7xZhvrXYhTbt+GXOULTMiraapY7Jmw47uQgDpjUZeBQNLzhb2PCA 6+kwcOkEq66HYl4vQo1MznKliJ34ZZMWM5GSOdmHLc7XKbEF5/C23IpV3lEhFfAQ 37/depuv7brniJVonopyRmKvn41Q2idUerI6CYouktf+/XAg+6uKnrrVv/+feAx5 WWH8c3HZ1qhtT6HO375G5c5goBsUiDZNJSZBZg9jIz8HHG9kcF5RpHu85Zmb8EeW bK1pSmnoM4SUZdUI320zFViY1XGz3JNC/FW+ZZrOnsIN3XxwRGAmzE7u4kdQO2tt n7ti4Y5Xv/5knIUNGeWfD7GOgVoglDiM0jk+Ky23LFDTmesc/tPbHCk8x4sjMyew gDlcXFX8CnFNpTpFDrbt =CokU -----END PGP SIGNATURE----- --O5XBE6gyVG5Rl6Rj--
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