[Xen-users] tls and segfaults

[jacques Normand <jnormand@xxxxxxxxx>]

Hi,

I am runnign a debian etch system with the packaged xen3.0.3 and the
patched kernel for the source distrib (2.6.16.29). I try both pae and
none pae modes on my 4G dual athlon. But in all cases I un into problems
in the domu. I see segfaults in what seem to be tls libraries but not in
/lib/tls/ (/lib/libnsl.so.1 to be exact). I have installed libc6-xen and
moved /lib/tls out of the way. 

My question is then, why isn't the emulation mode activted? I would not
mind a slowdown for the occasionnal call to that library rather than the
segfault....

jacques

PS: bcfg2 is what I use to trigger it:
> strace bcfg2 -vvvv -d
...
open("/usr/lib/libgpg-error.so.0", O_RDONLY) = 5
read(5, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\220\6\0"..., 512) = 512
fstat64(5, {st_mode=S_IFREG|0644, st_size=11556, ...}) = 0
mmap2(NULL, 14568, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 5, 0) = 
0xb7a0c000
mmap2(0xb7a0f000, 4096, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 5, 0x2) = 0xb7a0f000
close(5)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/usr/lib/libz.so.1", O_RDONLY)    = 5
read(5, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\340\26"..., 512) = 512
fstat64(5, {st_mode=S_IFREG|0644, st_size=78500, ...}) = 0
mmap2(NULL, 81456, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 5, 0) = 
0xb79f8000
mmap2(0xb7a0b000, 4096, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 5, 0x12) = 0xb7a0b000
close(5)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/lib/tls/i686/cmov/libnsl.so.1", O_RDONLY) = -1 ENOENT (No such file or 
directory)
open("/lib/libnsl.so.1", O_RDONLY)      = 5
read(5, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0`5\0\000"..., 512) = 512
fstat64(5, {st_mode=S_IFREG|0644, st_size=72452, ...}) = 0
mmap2(NULL, 83712, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 5, 0) = 
0xb79e3000
mmap2(0xb79f4000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 5, 0x10) = 0xb79f4000
mmap2(0xb79f6000, 5888, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb79f6000
close(5)                                = 0
munmap(0xb7bbf000, 11093)               = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++
Process 1487 detached

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