[cl-debian] Bug#394775: Sparc64 install fails: 'sbcl.sh install-clc' segfaults

[Peter Van Eynde]

Hello,

Your logs show that there is a memory layout conflict in sbcl:

On Saturday 04 November 2006 10:45, J.P. Larocque wrote:
> > cat /proc/self/maps
> 
> ---8<---8<---
> 00010000-00014000 r-xp 00000000 08:01 6201                               /bin/cat
> 00022000-00024000 rwxp 00002000 08:01 6201                               /bin/cat
> 00024000-00046000 rwxp 00024000 00:00 0                                  [heap]
> f7d24000-f7e78000 r--p 00000000 fe:00 16461                              /usr/lib/locale/locale-archive

And then sbcl does an allocation of the linkage tables from 
0xf800000 upto 0x10000000. This goes right over where the 
libraries are in memory:

src/compiler/sparc/parms.lisp
...
  (def!constant linkage-table-space-start #x0f800000)
  (def!constant linkage-table-space-end   #x10000000)

and in the strace:


> mmap(0xf800000, 8388608, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = 0xf800000

A while later it crashes. To fix this one would need access to 
a sparc64 machine to further debug this problem, but vore
is still down so I cannot use a debian machine to investigate this.

If you can recompile sbcl you could try to change the parms.lisp file move the 
LT to some other place. Maybe #xa0000000 to #xa0800000?

Groetjes, Peter

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