Re: 32-bit segfaults on x86_64 in recent mm kernels

[Andy Lutomirski <luto@myrealbox.com>]

Andy Lutomirski wrote:
> I've had segfaults in 32-bit emulation in recent (and not-so-recent) -mm
> kernels on x86_64.
> 
> 2.6.7-gentoo-r11 and 2.6.10-rc1 both work fine (even wine works for the 
> most part).
> 
> 2.6.9-rc3-mm3 can't run wine -- it always segfaults.  Other apps seem OK.
> 
> 2.6.10-rc1-mm1 can't run anything -- even this segfaults (compiled with 
> both
> 'gcc -o foo -m32 foo.c' and 'gcc -o foo -m32 -Wl,-zexecstack foo.c'):
> 
> #include <stdio.h>
> 
> int main()
> {
>        printf("Hello %d\n", (int)(sizeof(int*)));
>        return 0;
> }
> 
> Sorry, no debug info, since debugging tools segfault too.
> 
> This is my syslog for 2.6.10-rc1-mm1, with some userspace stuff stripped:

s/2.6.10-rc1-mm1/2.6.10-rc1-mm3/g, obviously.

> 
> Nov  7 08:37:41 luto Linux version 2.6.10-rc1-mm3 

etc.

--Andy