[Qemu-devel] [Bug 1529226] Re: qemu-i386-user on 32-bit Linux: uncaught target signal 11

[PeteVine]

My recollection is fuzzy but it would probably amount to something like
this on any platform currently:

- download rust-1.10 beta source https://static.rust-lang.org/dist
/rustc-beta-src.tar.gz

- download this stage0 snapshot
https://www.dropbox.com/s/01ywl9mwwo6xojw/rust-stage0-2016-04-18-b324fa7
-linux-armv7.tar.xz?dl=0

- unpack the stage0 rustc binary to ~/somewhere/bin, renaming it to
rustc.bin, and create a wrapper script named rustc in that directory
containing:

`/usr/bin/qemu-arm ~/somewhere/rustc.bin "$@"`

In the rustc source directory, start the rust bootstrap process (with LLVM 3.7 
or higher installed) issuing the following command:
`./configure --enable-optimize --enable-local-rust 
--local-rust-root=~/somewhere --llvm-root=/usr`

Followed by `make`.

At the time of the original report, QEMU wasn't able to complete all
crates' build commands naturally. (the stamp file had to be created
manually to continue)

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https://bugs.launchpad.net/bugs/1529226

Title:
  qemu-i386-user on 32-bit Linux: uncaught target signal 11

Status in QEMU:
  New

Bug description:
  Even though the command I'm trying to run (a wrapper script for
  qemu-i386-user running rustc, the rust compiler)  produces the
  expected  compiled output, the build process is interrupted:

  qemu: uncaught target signal 11 (Segmentation fault) - core dumped
  i686-unknown-linux-gnu/stage0/bin/rustc: line 1:  7474 Segmentation fault     
 /usr/local/bin/qemu-i386 -cpu qemu32 /home/petevine/stage0/rustc.bin -C 
target-cpu=pentium2 -L 
/home/petevine/unpacked/rust-master/i686-unknown-linux-gnu/stage0/lib/rustlib/i686-unknown-linux-gnu/lib/
 "$@"
  make: *** 
[i686-unknown-linux-gnu/stage0/lib/rustlib/i686-unknown-linux-gnu/lib/stamp.rustc_back]
 Error 139

  The stamp file is not being created so this could be about forking
  bash after finishing the wrapper script.

  Qemu was compiled from the latest git source.

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