Bug#768360: iceweasel: crashes with Illegal instruction at startup

[Ondrej Zary]

On Tuesday 11 November 2014 00:17:59 Mike Hommey wrote:
> On Tue, Nov 11, 2014 at 12:06:30AM +0100, Ondrej Zary wrote:
> > (gdb) print JSC::MacroAssemblerX86Common::s_sseCheckState
> > $1 = JSC::MacroAssemblerX86Common::HasSSE3
>
> Aha! At least now it's clear what part is doing wrong.
>
> Can you compile and run the following code, and give its output?
>
> #include <stdio.h>
>
> int main() {
>   int flags_edx = 0;
>   int flags_ecx = 0;
>   asm (
>        "movl $0x1, %%eax;"
>        "pushl %%ebx;"
>        "cpuid;"
>        "popl %%ebx;"
>
>        : "=c" (flags_ecx), "=d" (flags_edx)
>        :
>        : "%eax"
>
>        );
>   printf("%04x %04x\n", flags_ecx, flags_edx);
>   return 0;
> }

$ cc -Wall test.c -o test
$ ./test
4db6ebee 80a135
$ ./test
24953363 80a135
$ ./test
235945c1 80a135
$ ./test
e6ad9217 80a135
$ ./test
c74a535e 80a135
$ ./test
8671f3 80a135

This was the same bug, only in kernel: 
https://bugzilla.kernel.org/show_bug.cgi?id=3767

-- 
Ondrej Zary