Various notes: Good point by Chituc. I had assumed this was already cross-compiled, but according to the Ubuntu build log: > checking whether cross compiling... no
Who here knows how the Arch Linux armhf package is built? It's also still possible that a newer toolchain could fix things. I read somewhere that Ubuntu 18.04 Bionic would be upgrading to gcc 7. Anyone tried Firefox 58 or 59 on there? The SkJumper_generated source is available on Mercurial: https://hg.mozilla.org/mozilla-central/raw- file/tip/gfx/skia/skia/src/jumper/SkJumper_generated.S It's possible to take a closer look at the "illegal instruction" with firefox -g. At the crash point in gdb, run: layout asm; set arm fallback-mode arm; tui disable; disas /r <starting instruction>,<ending instruction>. Initially it gets confused about the instruction layout, but after trying different ranges it'll eventually decode properly: (gdb) disas /r 0xf458bb28,0xf458bb3e Dump of assembler code from 0xf458bb28 to 0xf458bb3e: 0xf458bb28: 92 2c 44 f2 vfma.f32 d18, d20, d2 0xf458bb2c: 93 3c 44 f2 vfma.f32 d19, d20, d3 0xf458bb30: b0 01 20 f2 vorr d0, d16, d16 0xf458bb34: b1 11 21 f2 vorr d1, d17, d17 0xf458bb38: b2 21 22 f2 vorr d2, d18, d18 0xf458bb3c: b3 31 23 f2 vorr d3, d19, d19 End of assembler dump. However, those are exactly the instructions specified for _sk_xor__vfp4 in SkJumper_generated.S. It's hard to see how the compiler or binutils could be directly responsible for generating an illegal instruction here. You can actually hexedit libxul.so and change those four vorr instructions into NOPs. Firefox then makes it past this point but crashes obscurely elsewhere, with different crash signatures on Firefox 58 vs 59. Firefox arm64 (Pi 3 or other 64-bit board required) 58 and 59 still work. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1711337 Title: Firefox crashes at start on armv7L after 55.0.1 update To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1711337/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
