Comment 49 for bug 789198

H
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-----Original Message-----
From: derf <email address hidden>
Sender: <email address hidden>
Date: Sun, 03 Jul 2011 19:35:58
To: <email address hidden>
Reply-To: Bug 789198 <email address hidden>
Subject: [Bug 789198]

Comment on attachment 542230
Enforce alignment for ARM code in Thumb mode in libvpx

># HG changeset patch
># User Timothy B. Terriberry <email address hidden>
># Date 1309201530 25200
># Node ID 1e745d4b39c8f8d7ffb3d4b8cdd7fafce68c5349
># Parent e338daa71bc2fdb9c05a276ef1a477e1730f0aca
>Bug 666931 - Enforce alignment for ARM code in Thumb mode in libvpx
>
>diff --git a/media/libvpx/build/make/ads2gas.pl b/media/libvpx/build/make/ads2gas.pl
>--- a/media/libvpx/build/make/ads2gas.pl
>+++ b/media/libvpx/build/make/ads2gas.pl
>@@ -74,17 +74,20 @@ while (<STDIN>)
>
> # Convert INCLUDE to .INCLUDE "file"
> s/INCLUDE(\s*)(.*)$/.include $1\"$2\"/;
>
> # Code directive (ARM vs Thumb)
> s/CODE([0-9][0-9])/.code $1/;
>
> # No AREA required
>- s/^\s*AREA.*$/.text/;
>+ # But ALIGNs in AREA must be obeyed
>+ s/^\s*AREA.*ALIGN=([0-9])$/.text\n.p2align $1/;
>+ # If no ALIGN, strip the AREA and align to 4 bytes
>+ s/^\s*AREA.*$/.text\n.p2align 2/;
>
> # DCD to .word
> # This one is for incoming symbols
> s/DCD\s+\|(\w*)\|/.long $1/;
>
> # DCW to .short
> s/DCW\s+\|(\w*)\|/.short $1/;
> s/DCW(.*)/.short $1/;
>diff --git a/media/libvpx/update.sh b/media/libvpx/update.sh
>--- a/media/libvpx/update.sh
>+++ b/media/libvpx/update.sh
>@@ -321,8 +321,11 @@ patch -p3 < solaris.patch
> # Patch to fix link with xcode4
> patch -p1 < xcode4.patch
>
> # Patch to fix data race on global function pointers
> patch -p3 < bug640935.patch
>
> # Patch to avoid text relocations on ARM
> patch -p3 < bug646815.patch
>+
>+# Patch to fix alignment problems with using ARM asm in Thumb mode.
>+patch -p3 < bug666931.patch

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https://bugs.launchpad.net/bugs/789198

Title:
  Firefox crashes when attempting to play webm video on ARM with Thumb2
  enabled

Status in binutils:
  Fix Released
Status in The Mozilla Firefox Browser:
  Fix Released
Status in Linaro Ubuntu Evaluation Builds:
  Fix Released
Status in “binutils” package in Ubuntu:
  New
Status in “firefox” package in Ubuntu:
  Triaged

Bug description:
  Binary package hint: firefox

  This bug was discovered on Linaro 11.05 LEB image "ubuntu-desktop"
  with "panda" hwpack.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: firefox 4.0.1+build1+nobinonly-0ubuntu0.11.04.2
  ProcVersionSignature: Ubuntu 2.6.38-1003.4~ppa5-hostname-omap 2.6.38.7
  Uname: Linux 2.6.38-1003-linaro-omap armv7l
  Architecture: armel
  Date: Fri May 27 15:56:39 2011
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-linaro-n-ubuntu-desktop-20110526-0
  FirefoxPackages:
   firefox 4.0.1+build1+nobinonly-0ubuntu0.11.04.2
   flashplugin-installer N/A
   adobe-flashplugin N/A
   icedtea-plugin N/A
  ProcEnviron:
   LANGUAGE=C:en
   LANG=C
   SHELL=/bin/bash
  SourcePackage: firefox
  UpgradeStatus: No upgrade log present (probably fresh install)

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